Patent Publication Number: US-2021179390-A1

Title: Door-pinch detection device and elevator door device

Description:
FIELD 
     The present invention relates to a door-pinch detection device and an elevator door device. 
     BACKGROUND 
     An elevator door device is equipped with a variety of sensors that detect an alien object likely to get pinched between doors when the doors are closed for the purpose of ensuring safety for boarding and alighting passengers. A thin elongated object and a string-shaped object to be attached to a pet such as a dog are relatively difficult for the sensors to detect due to the small diameters thereof 
     As a method for solving such a problem, for example, a method as in PTL 1 has been known, where a pressure sensor is provided in a vertical direction on a door hitting face of one of doors while a cushioning member is provided at an end portion of the other door. 
     In PTL 1, the pressure sensor detects a pressure resulting from an elongated object or a string-shaped object, which intersects the door hitting face, being pressed via the cushioning member to detect an alien object. 
     In addition, for example, PTL 2 discloses a pressure-sensitive sensor for detecting a string-shaped object on a side face of one of doors. The pressure-sensitive sensor is fixed to a car door via a fixation hole made in a receiving member. 
     CITATION LIST 
     Patent Literature 
     
         
         [PTL 1] JP 2008-143619 A (see paragraph 0024, FIG. 2, etc.) 
         [PTL 2] JP 2007-131389 A (see paragraph 0015, FIG. 4, etc.) 
       
    
     SUMMARY 
     Technical Problem 
     Meanwhile, to reduce a door hitting sound caused immediately before door panels of an elevator are fully closed, the two door panels are often installed with door hitting faces thereof inclined in an inverted V-shape and thus the door hitting faces of the doors on both sides are unlikely to be parallel with each other. In a case where the pressure sensor and the cushioning member of PTL 1 are installed with the door hitting faces of the doors on both sides being not in parallel with each other, one of a lower side and an upper side of the pressure sensor is spaced from the cushioning member at a distance of several millimeters. If the lower side of the pressure sensor is spaced from the cushioning member, the door-pinch of an alien object cannot be detected at the lower side of the pressure sensor due to a failure of the pressure sensor and the cushioning member to contact with each other even when the doors are closed, although the door-pinch of an alien object can be correctly detected at the upper side of the pressure sensor. 
     Accordingly, in installing the pressure sensor and the cushioning member in an existing elevator, it is necessary to reinstall the doors to adjust the angles of the doors, which makes the installation of the door-pinch detection device time-consuming. 
     Further, PTL 2, which discloses the receiving member having the fixation hole for attaching the pressure-sensitive sensor to the car door, is silent about adjusting the inclination of the pressure-sensitive sensor with respect to the inclination of the door of an elevator. Therefore, in a case where the door hitting faces are attached while being inclined in an inverted V-shape, the door-pinch of an alien object fails to be correctly detected. 
     An object of the present application is to obtain a door-pinch detection device and an elevator door device that solve the above-described problems and enable detection of a string-shaped object. 
     Solution to Problem 
     A door-pinch detection device of the present application includes: a first attachment section and a second attachment section attached to at least either side face of a front face or a back face of a door panel of an elevator, the first attachment section including a pressure sensor, the second attachment section including a repulsive member installed in a manner for the pressure sensor to be housed therein; and at least either one of a first angle adjustment section provided in the first attachment section to adjust an attachment angle of the pressure sensor with respect to the door panel for installation or a second angle adjustment section provided in the second attachment section to adjust an attachment angle of the repulsive member with respect to the door panel for installation. 
     Further, an elevator door device of the present application includes: a door panel of an elevator; a door-pinch detection device including a first attachment section and a second attachment section installed on at least either one of a front face or a back face of the door panel, the first attachment section including a pressure sensor, the second attachment section including a repulsive member installed in a manner for the pressure sensor to be housed therein when doors of the elevator are closed; and a third angle adjustment section provided in the door panel to adjust an attachment angle of at least either one of the first attachment section or the second attachment section for installation. 
     Advantageous Effects of Invention 
     The door-pinch detection device and the elevator door device according to the present application enable the adjustment of an angle of the pressure sensor relative to the door panel, thus enabling an improvement in accuracy in detecting the door-pinch of an alien object. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is block diagram of a door device including a door-pinch detection device of the present application. 
         FIG. 2 a    is a figure showing the inclination of a car-side door panel of a door-pinch detection device of Embodiment 1 of the present application. 
         FIG. 2 b    is a figure showing the inclination of the car-side door panel of the door-pinch detection device of Embodiment 1 of the present application in another case. 
         FIG. 3  is a perspective drawing of a door device including the door-pinch detection device of Embodiment 1 of the present application. 
         FIG. 4 a    is a sectional drawing of the door device including the door-pinch detection device of Embodiment 1 of the present application. 
         FIG. 4 b    is a sectional drawing of the door device including the door-pinch detection device of Embodiment 1 of the present application. 
         FIG. 5  is a perspective drawing of a door device including a door-pinch detection device of Embodiment 2 of the present application. 
         FIG. 6  is a sectional drawing of the door device including the door-pinch detection device of Embodiment 2 of the present application. 
         FIG. 7  is a perspective drawing of a door device including a door-pinch detection device of Embodiment 3 of the present application. 
         FIG. 8  is a sectional drawing of the door device including the door-pinch detection device of Embodiment 3 of the present application. 
         FIG. 9  is a control flowchart of the door device of the present application. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     Embodiment 1 
     A door-pinch detection device  10  and a door device  100  for an elevator according to Embodiment 1 of the present application will be described below with reference to the drawings. 
       FIG. 1  shows a structure of the door device  100  for an elevator of Embodiment 1 of the present application. The door device  100  is a door device for an elevator car. The door device  100  includes the door-pinch detection device  10 . The door-pinch detection device  10  includes a first attachment member  11  (first attachment section) and a second attachment member  12  (second attachment section). The first attachment member  11  is attached to a car-side door panel  21 , while the second attachment member  12  is attached to a car-side door panel  22 . 
     The car-side door panels  21  and  22  are coupled to a door device support frame  20  provided above. A coupler  23   a,  a coupler  23   b,  a rail  24 , a door hanger  25   a,  a door hanger  25   b,  a hanging handle  26   a,  a hanging handle  26   b,  a belt  27 , a lazy-side pulley  28 , and a motor  29  are provided in the door device support frame  20 . 
     The car-side door panels  21  and  22  are fixed to the coupler  23   a  and the coupler  23   b,  respectively. The coupler  23   a  and the coupler  23   b  move right and left in  FIG. 1  along the rail  24 , which is horizontally provided, via the door hanger  25   a  and the door hanger  25   b.    
     The door hanger  25   a  and the door hanger  25   b  roll right and left on the rail  24 . The hanging handle  26   a  is attached to the coupler  23   a.  The hanging handle  26   b  is attached to the coupler  23   b.  The hanging handle  26   a  is fixed to the coupler  23   a  at one end while being fixed to the belt  27  at the other end. The hanging handle  26   b  is fixed to the coupler  23   b  at one end while being fixed to the belt  27  at the other end. The belt  27  is an endless belt wound on the lazy-side pulley  28  and a pulley of the motor  29 . 
     The lazy-side pulley  28  and the motor  29  are horizontally fixed to the door device support frame  20 . The belt  27  rotates with the driving of the motor  29 . The hanging handle  26   a  is fixed to the belt  27  on an upper side relative to the lazy-side pulley  28  and the pulley of the motor  29 . The hanging handle  26   b  is fixed to the belt  27  on the upper side relative to the lazy-side pulley  28  and the pulley of the motor  29 . 
     Thus, when the belt  27  rotates clockwise, the car-side door panel  21  moves right in  FIG. 1  and the car-side door panel  22  moves left. Meanwhile, when the belt  27  rotates counterclockwise, the car-side door panel  21  moves left in  FIG. 1  and the car-side door panel  22  moves right. 
     Such a structure causes a torque of the motor  29  to be transmitted to each of the car-side door panels  21  and  22 . Further, the open and close motion of the car-side door panels  21  and  22  is enabled by switching the rotation direction of the motor  29 . 
     Meanwhile, dotted lines in  FIG. 1  show hall-side door panels  31  and  32 . The hall-side door panels  31  and  32  are removably fixed to the car-side door panels  21  and  22  by a coupling device  33   a  and a coupling device  33   b.    
     During the open and close motion of the car-side door panels  21  and  22 , since the hall-side door panels  31  and  32  are fixed to the car-side door panels  21  and  22 , the hall-side door panels  31  and  32  also perform an open and close motion with the open and close motion of the car-side door panels  21  and  22 . 
     A pressure sensor  11   a  of the first attachment member  11  and the motor  29  are coupled to a door controller  40 . When a car arrives at each floor, the door controller  40  transmits a control instruction to the motor  29 . The door controller  40  also transmits a control instruction to the motor  29  on the basis of an operation of an operating panel (not shown) in the car performed by a user. 
     Further, the first attachment member  11  transmits a detection result to the door controller  40 . When it is detected that an alien object is pinched by the first attachment member  11  during the door close motion of the car-side door panels  21  and  22 , the door controller  40  transmits a signal for stopping the door close motion or a signal for switching to the door open motion to the motor  29 . 
     A detailed configuration of each of the first attachment member  11  and the second attachment member  12  will be described later. 
     It should be noted that the door controller  40  manages the open and close motion of the car-side door panels  21  and  22  while communicating with a control panel (not shown) that manages the motion of the whole of an elevator. The control panel controls the driving of a traction machine of the elevator on the basis of, for example, call registration and destination floor registration. 
     Here, the inclination of each of the car-side door panels  21  and  22  and the attachment angle of each of the first attachment member  11  and the second attachment member  12  will be described with reference to  FIG. 2   a.    
     To reduce a door hitting sound caused immediately before full close, the car-side door panel  21  is attached to the coupler  23   a  with a slight counterclockwise inclination. 
     Meanwhile, the car-side door panel  22  is attached to the coupler  23   b  with a slight clockwise inclination. 
     That is, the door hitting face  21   a  of the car-side door panel  21  and the door hitting face  22   a  of the car-side door panel  22  are in a V-shape. 
     Thus, even when a lower end of the door hitting face  21   a  and a lower end of the door hitting face  22   a  come into contact with each other during the door close motion, an upper end of the door hitting face  21   a  and an upper end of the car-side door panel  21  are spaced from each other by several millimeters. 
     Since the car-side door panels  21  and  22  are installed while being inclined in opposite directions to each other as described, the entire face of the door hitting face  21   a  and the entire face of the door hitting face  22   a  are prevented from simultaneously coming into contact with each other during the door close motion, thereby making it possible to reduce a contact sound caused by the door hitting faces  21   a  and  22   a.    
     However, attaching the first attachment member  11  and the second attachment member  12  respectively to the car-side door panels  21  and  22  in parallel with the door hitting faces  21   a  and  22   a  entails a problem that the accuracy of the first attachment member  11  in detecting an alien object is different between upper portion and lower portion of each of the car-side door panels  21  and  22 . 
     Hence, it is necessary to attach the first attachment member  11  and the second attachment member  12  to the car-side door panels  21  and  22  at angles different from those of the door hitting faces  21   a  and  22   a.    
     Accordingly, in the present application, the first attachment member  11  and the second attachment member  12  are attached while being angled with respect to the door hitting faces  21   a  and  22   a.  The first attachment member  11  and the second attachment member  12  are attached such that they are parallel with each other when doors of the elevator are closed. 
     It should be noted that the configuration where the door hitting face  21   a  of the car-side door panel  21  and the door hitting face  22   a  of the car-side door panel  22  are in a V-shape is described with reference to  FIG. 2 a   . However, the door hitting faces  21   a  and  22   a  are sometimes in an inverted V-shape when the doors are closed as shown in  FIG. 2 b    depending on the installation manner of the car-side door panels  21  and  22 . Even in such a case, the first attachment member  11  and the second attachment member  12  are attached with respect to the door hitting faces  21   a  and  22   a  such that the first attachment member  11  and the second attachment member  12  are in parallel with each other when the doors are closed. 
     Further, even in a case where the car-side door panels  21  and  22  are installed with the door hitting faces  21   a  and  22   a  being in parallel with each other, the car-side door panels  21  and  22  are sometimes inclined in a V-shape or an inverted V-shape as shown in  FIG. 2 a    or  FIG. 2 b    during the door close motion. Accordingly, with the inclination of each of the car-side door panels  21  and  22  during the door close motion taken into consideration in advance, the first attachment member  11  and the second attachment member  12  are attached while being inclined with respect to the door hitting faces  21   a  and  22   a.    
       FIG. 3  is a perspective drawing of the car-side door panels  21  and  22 .  FIG. 4 a    is an A-A sectional drawing in  FIG. 3  and  FIG. 4 b    is a B-B sectional drawing in  FIG. 3 .  FIG. 3  is a perspective drawing of the car-side door panels  21  and  22  with the door hitting faces  21   a  and  22   a  inclined in a V-shape as shown in  FIG. 2 a   . In  FIG. 4 a    and  FIG. 4 b   , an upper side in the figure is a car side and a lower side in the figure is a hall side. It should be noted that  FIG. 3  shows an alien object, namely, string  1 , between the car-side door panels  21  and  22 . 
     A detailed configuration of each of the first attachment member  11  and the second attachment member  12  will be described. The pressure sensor  11   a  is provided at a distal end of the first attachment member  11 . An elongated hole  11   b  (first angle adjustment section) and a pin hole  11   c  are made in the first attachment member  11 . The first attachment member  11  is fixed to the car-side door panel  21  with a fitting  13 , such as a pin, a screw, or bolt and nut, penetrating each of the elongated hole  11   b  and the pin hole  11   c.  The elongated holes  11   b  and  12   b  are each a hole elongated in the opening-closing direction of the doors. 
     A repulsive member  12   a  is provided at a distal end of the second attachment member  12 . Similarly to the first attachment member  11 , the elongated hole  12   b  (second angle adjustment section) and a pin hole  12   c  are made in a hall-side side face of the second attachment member  12 . The second attachment member  12  is fixed to the car-side door panel  22  with the fitting  13  in each of the elongated hole  12   b  and the pin hole  12   c.    
     By adjusting the position for the fitting  13  to penetrate in each of the elongated holes  11   b  and  12   b,  which are arc-shaped elongated holes, it is possible to adjust the attachment angle of the first attachment member  11  relative to the first attachment member  11  and the attachment angle of the second attachment member  12  relative to the second attachment member  12 . 
     The first attachment member  11  and the second attachment member  12  are attached to hall-side side faces (back faces) of the car-side door panels  21  and  22 , so that a passenger in the car cannot usually touch the door hitting face  21   a.  Further, when the hall-side door panels  31  and  32  are opened, the attachment angle of each of the first attachment member  11  and the second attachment member  12  can be adjusted from the hall. 
     However, although the configuration where the door-pinch detection device  10  is attached to the back faces of the car-side door panels  21  and  22  is described in the present application, the door-pinch detection device  10  may be attached to car-side side faces (front faces) of the car-side door panels  21  and  22 . 
     It should be noted that although the pin holes  11   c  and  12   c  are each a pin hole, the pin holes  11   c  and  12   c  may each be an elongated hole as the elongated holes  11   b  and  12   b.  With the pin holes  11   c  and  12   c  each being an elongated hole, it is possible to adjust the projection distance of the pressure sensor  11   a  relative to the door hitting face  21   a  and the retraction distance of the repulsive member  12   a  relative to the door hitting face  22   a.    
     In the case shown in  FIG. 4 a    and  FIG. 4 b   , the projection distance refers to a distance from the door hitting face  21   a  to a distal end of the pressure sensor  11   a.  The retraction distance refers to a distance from the door hitting face  22   a  to a distal end of the second attachment member  12 . 
     The pressure sensor  11   a  is a string-shaped cylinder. A wire where a certain voltage or current is to flow is provided in the pressure sensor  11   a.  When an alien object comes into contact with the pressure sensor  11   a,  the shape of the pressure sensor  11   a  deforms, causing a change in a resistance value of the current flowing in the pressure sensor  11   a.  The alien object can thus be detected. 
     The pressure sensor  11   a  is fixed to a distal end face of the first attachment member  11  with a bonding material, a tape, or the like. 
     The repulsive member  12   a  is machined into a shape that covers the pressure sensor  11   a  when the car-side door panels  21  and  22  are fully closed. 
     The repulsive member  12   a  is provided with a recessed portion. When the car-side door panels  21  and  22  are fully closed, the pressure sensor l la is received in the recessed portion of the repulsive member  12   a.  Thus, in the absence of an alien object, no pressure is applied to the pressure sensor  11   a.    
     In a case where a string-shaped alien object is pinched between the car-side door panels  21  and  22 , the repulsive member  12   a  causes a tensile force to be generated in the string-shaped alien object. Thus, the tensile force generated in the alien object causes a pressure to be applied to the pressure sensor  11   a,  so that the alien object can be detected. 
     It should be noted that the first attachment member  11  and the second attachment member  12  are attached in a vertical direction over a range from lower ends of the car-side door panels  21  and  22  to a predetermined height (for example, 1.0 m to 1.5 m). This is because it is less necessary to reach a height higher than the level of the hand of a person, i.e., a height of 1.5 m or higher, with the assumption that a string-shaped alien object is usually a string for leashing a pet such as a dog. 
     Further, as shown in  FIG. 4 a    and  FIG. 4 b   , the pressure sensor  11   a  is installed at a projected position in a door close direction with respect to the door hitting face  21   a,  while the repulsive member  12   a  is installed at a retracted position with respect to the door hitting face  22   a.    
     Installing at such positions makes, when a string-shaped alien object is pinched, a tensile force likely to be generated in the alien object, so that the accuracy of the pressure sensor  11   a  in detecting an alien object can be improved. 
     With the pressure sensor  11   a  projected with respect to the door hitting face  31   a,  the accuracy of the pressure sensor  11   a  in detecting an alien object can be further improved. 
     Inversely, the pressure sensor  11   a  may be installed at a retracted position in the door close direction with respect to the door hitting face  21   a,  while the repulsive member  12   a  is installed at a projected direction with respect to the door hitting face  22   a.    
     Installing at such positions prevents the pressure sensor  11   a  from projecting with respect to the door hitting face  21   a,  so that a failure of the pressure sensor  11   a  is less likely to be caused. 
     It should be noted that since the door hitting faces  21   a  and  22   a  are inclined in a V-shape in  FIG. 4 a    and  FIG. 4 b   , the projection distance of the pressure sensor  11   a  relative to the door hitting face  21   a  in  FIG. 4 b    is smaller than that in  FIG. 4   a.    
     Assuming that the car-side door panel  21  is divided into at least upper side and lower side, at least the lower side, the pressure sensor  11   a  projects with respect to the door hitting face  21   a.  Such a configuration makes, when a string-shaped alien object is pinched, a tensile force likely to be generated in the alien object, so that the accuracy of the pressure sensor  11   a  in detecting an alien object can be improved. 
     As described above, in Embodiment 1, the first attachment member  11  and the second attachment member  12  are provided with the angle adjustment sections, namely, the elongated holes  11   b  and  12   b.  This makes it possible to adjust the attachment angle of each of the first attachment member  11  and the second attachment member  12  even though the door hitting faces  21   a  and  22   a  are not in parallel but inclined, thus enabling an alien object pinched between the car-side door panels  21  and  22  to be detected with an improved accuracy. 
     It should be noted that although the configuration where the first attachment member  11  and the second attachment member  12  are both provided with the angle adjustment sections, namely, the elongated holes  11   b  and  12   b,  is described in Embodiment 1, it is sufficient if either one of the first attachment member  11  and the second attachment member  12  is provided with the angle adjustment section. 
     Further, in a case where the pressure sensor  11   a  and the door hitting face  21   a  are directly attached to the door hitting faces  21   a  and  22   a,  a door width is increased by an amount corresponding to the width of each of the first attachment member  11  and the second attachment member  12 , so that it is necessary to adjust the movable distance of each of the car-side door panels  21  and  22  during the open and close motion or replace them with door panels each having a width smaller by an amount corresponding to the width of each of the first attachment member  11  and the second attachment member  12 . 
     However, in the configuration of the present application, the first attachment member  11  and the second attachment member  12  are fixed to not the distal end faces of the car-side door panels  21  and  22  but the side faces thereof, so that neither adjustment of the movable distance of each of the car-side door panels  21  and  22  nor replacement of the door panels is necessary. 
     Therefore, in newly attaching the door-pinch detection device of the present application to an elevator that has already been installed, the attachment work can be easily performed. 
     Embodiment 2 
     In Embodiment 1, description is made on the configuration where the first attachment member  11  and the second attachment member  12  are provided with the elongated holes  11   b  and  12   b  to allow the attachment angles of the first attachment member  11  and the second attachment member  12  to be adjusted. 
     In Embodiment 2, description will be made on a configuration where the angles of the first attachment member  11  and the second attachment member  12  relative to the door hitting faces  21   a  and  22   a  are automatically adjusted in accordance with the door close motion. 
       FIG. 5  is a perspective drawing of a door device including a door-pinch detection device of Embodiment 2.  FIG. 6  is a C-C sectional drawing of  FIG. 5 . 
     In Embodiment 2, a first attachment member  51  and a second attachment member  52  are attached to the car-side door panels  21  and  22 , respectively. 
     The second attachment member  52  includes a fixation portion fixed with the fitting  13 , a repulsive member  52   a,  and an intermediate portion provided between the fixation portion and the repulsive member  52   a.    
     An adjustment member  52   c  (adjustment member) including an elastic blank material is inserted in the intermediate portion of the second attachment member  52 . The blank material of the adjustment member  52   c  is, for example, a resin or the like. 
     An upper portion or a lower portion of the repulsive member  52   a  is extended and retracted with respect to a door hitting face vertical face by a door hitting force to cause the second attachment member  52  to swingably move to enable the attachment angle to be adjusted. 
     The door close force of each of the car-side door panels  21  and  22  during door full close is set larger than the repulsive force of the pressure sensor  51   a.    
     The repulsive force of the repulsive member  52   a  is set larger than the motion sensitivity of a pressure sensor to enable a string-shaped alien object to be detected by the pressure sensor. However, since an excessive repulsive force of the repulsive member  52   a  is unlikely to allow the doors (the car-side door panels  21  and  22 ) to be closed, a door pressing force for full close is set larger than the repulsive force of the repulsive member  52   a.  The relationship of the repulsive force of the pressure sensor  51   a,  the repulsive force of the repulsive member  52   a,  and the door pressing force satisfies the following Expressions (1) and (2). 
       The repulsive force of the pressure sensor 51a&lt;the repulsive force of the adjustment member 52 c    (Expression 1)
 
       The repulsive force of the adjustment member 52c&lt;the door pressing force   (Expression 2)
 
     A unit for the repulsive force of the pressure sensor  51   a,  the repulsive force of the repulsive member  52   a,  and the door pressing force is N. 
     In Expression 1, the repulsive force of the pressure sensor  51   a  is a value given by multiplying the motion sensitivity of the pressure sensor  51   a  by the contact area (mm{circumflex over ( )}2) of a pinched string or the diameter (mm) of the string. For example, in a case where the motion sensitivity of the pressure sensor Ma is a value calculated by dividing the force (N) by the area (mm{circumflex over ( )}2), a value given by multiplying the motion sensitivity (N/mm{circumflex over ( )}2) by the contact area (mm{circumflex over ( )}2) of the string is the repulsive force of the pressure sensor Ma. Meanwhile, for example, in a case where the motion sensitivity of the pressure sensor  51   a  is a value calculated by dividing the force (N) by a length (mm), a value given by multiplying the motion sensitivity (N/mm) by the contact length (mm) of the string is the repulsive force of the pressure sensor  51   a.    
     The repulsive force of the adjustment member  52   c  is a value given by multiplying the elastic force (N/mm{circumflex over ( )}2) of the adjustment member  52   c  by the contact area (mm{circumflex over ( )}2) of the string. 
     That is, the motion sensitivity (N/mm{circumflex over ( )}2) of the pressure sensor Ma is a value smaller than the elastic force (N/mm{circumflex over ( )}2) of the adjustment member  52   c.    
     It should be noted that although the repulsive force of the pressure sensor  51   a  and the repulsive force of the adjustment member  52   c  are each a value dependent on the thickness of a string, the contact area and the contact distance of the string are the same between the pressure sensor Ma and the adjustment member  52   c,  so that a blank material that satisfies the conditions of Expression 1 may be selected by comparing the motion sensitivity of the pressure sensor  51   a  and the elastic force of the adjustment member  52   c  with each other. In other words, the adjustment member  52   c  includes a blank material harder than that of the pressure sensor  51   a.    
     In Expression 2, the repulsive force of the adjustment member  52   c  is a force (N) with which the entire adjustment member  52   c  pushes back the door panels  21  and  22  when the doors are fully closed, and a door pressing force is a force (N) with which the door panels  21  and  22  are pushed when the doors are fully closed. Since door panels  21  and  22  cannot be closed if the blank material of the adjustment member  52   c  is too hard, a blank material that satisfies the conditions of Expression 2 is selected or the door pressing force is increased. 
     As described above, in the configuration of Embodiment 2, the adjustment member  52   c  is provided at the intermediate portion, which is not fixed with the fitting  13 , of the second attachment member  52 . This causes the repulsive member  52   a  to automatically rotate by virtue of the pressing force of the car doors applied when the car-side door panels  21  and  22  are fully closed, enabling the repulsive member  52   a  to be parallel with respect to the pressure sensor  51   a.    
     It should be noted that the adjustment member  52   c  may include a spring or a leaf spring instead of a resin. Further, the fitting  13  inserted in the pin hole  52   b  may include an elastic member with an elastic force. 
     It should be noted that although the configuration where the adjustment member  52   c  is inserted in the intermediate portion of the second attachment member  52  is described, an adjustment member may be inserted in an intermediate portion of the first attachment member  51 . Alternatively, an adjustment member may be inserted in the intermediate portion of each of the first attachment member  51  and the second attachment member  52 . 
     Embodiment 3 
     While the configuration where the first attachment member  11 , the second attachment member  12 , the first attachment member  51 , and the second attachment member  52  are each provided with an angle adjustment section is described in Embodiments 1 and 2, a configuration where the car-side door panels  21  and  22  are each provided with an angle adjustment section will be described in Embodiment 3 with reference to  FIG. 7  and  FIG. 8 . 
     In Embodiment 3, respective third angle adjustment sections, namely, elongated holes  21   b  and  22   b,  are made in the car-side door panels  21  and  22 . The elongated holes  21   b  and  22   b  are each an arc-shaped elongated hole. 
     Respective pin holes  61   b  are made in the first attachment member  61  and the second attachment member  62 . The first attachment member  61  and the second attachment member  62  are fixed to the car-side door panels  21  and  22  with the fittings  13  inserted in the pin holes  61   b.    
     With the holes made in the car-side door panels  21  and  22  each being an arc-shaped elongated hole, it is possible to adjust the attachment angles and the attachment positions of the first attachment member  61  and the second attachment member  62 . The attachment positions refer to the projection distance of the pressure sensor  61   a  relative to the door hitting face  21   a  and the retraction distance of the repulsive member  62   a  relative to the door hitting face  22   a.    
     As described above, in the configuration of Embodiment 3, although neither the first attachment member  61  nor the second attachment member  62  has an elongated hole and neither the first attachment member  61  nor the second attachment member  62  includes an adjustment member, the angle adjustment sections, namely, the elongated holes  21   b  and  22   b,  provided in the car-side door panels  21  and  22  make it possible to adjust the attachment angles of the first attachment member  61  and the second attachment member  62 . 
     It should be noted that the pin holes  61   b  and  62   b  may each be an elongated hole as in Embodiment 1 instead of a pin hole. With the pin holes  61   b  and  62   b  each being an elongated hole, it is possible to more easily adjust the angles and the positions of the car-side door panels  21  and  22  in attaching them to the first attachment member  61  and the second attachment member  62 . 
     Further, in Embodiment 3, the fittings  13  each include a resin, a spring, or the like with an elastic force, so that the fittings  13  can be used as the adjustment members. In this case, even when the elongated holes  21   b  and  22   b  are each a pin hole, by virtue of the elastic forces of the adjustment members, the pressing forces of the car doors applied when the car-side door panels  21  and  22  are fully closed cause the pressure sensor  61   a  and the repulsive member  62   a  to automatically rotate, enabling them to be parallel with each other as in Embodiment 2. 
     Further, in a case of such a configuration, Expression (1) described above is satisfied. 
       FIG. 9  is a control flowchart for a door device including a door-pinch detection device. This control flowchart is applicable to the configurations of Embodiments 1 to 3. 
     In step 1 (S1), the door controller  40  judges, during the door close motion, whether or not the doors are within 30 mm from each other before being fully closed. If they are within 30 mm, the process proceeds to step 2. 
     In step 2 (S2), the door controller  40  judges whether or not the pressure sensor ( 11   a,    51   a,    61   a ) has detected an alien object. If the pressure sensor has detected an alien object, the process proceeds to step 3. If the pressure sensor has detected no alien object, the process proceeds to step 4. 
     In step 3 (S3), the door controller  40  transmits a running stop signal for the car to a control panel (not shown) in order for the car not to run. When receiving the running stop signal, the control panel performs a control to cause a traction machine (not shown) not to be driven. 
     In step 4 (S4), the door controller  40  judges whether or not a predetermined time (for example, 3 seconds) has elapsed since the start of the running of the car. If the predetermined time has elapsed, the process proceeds to S1. If the predetermined time has not elapsed, the process returns to S2. It should be noted that the predetermined time may be set at the time of shipment from the factory or may be changed by a maintainer after the elevator is installed. 
     By providing S4, even after the running of the car is started, detection performed by the pressure sensor is to continue until the predetermined time elapses. The running of the car can be stopped even if the pressure sensor detects an alien object immediately after the running of the car is started, which enabling the safety of the elevator to be improved. 
     Although Embodiments 1 to 3 described above each relate to a double-doored configuration, a similar effect can be obtained in a case of a single-swinging door by attaching one of a pressure sensor and a repulsive member to a door-hitting-side frame. 
     REFERENCE SIGNS LIST 
     
         
           100  door device 
           10  door-pinch detection device 
           1  string 
           11  first attachment member 
           11   a  pressure sensor 
           11   b  elongated hole 
           11   c  pin hole 
           12  second attachment member 
           12   a  repulsive member 
           12   b  elongated hole 
           12   c  pin hole 
           13  fitting 
           21  car-side door panel 
           21   a  door hitting face 
           21   b  elongated hole 
           22  car-side door panel 
           22   a  door hitting face 
           22   b  elongated hole 
           40  door controller 
           52   c  adjustment member