JP6220591B2 - Elevator door safety device - Google Patents

Description

  The present invention relates to an elevator door safety device, and more particularly to an elevator door safety device that can prevent a car from traveling while a string-like foreign object is sandwiched in a door provided in the elevator car.

  Conventionally, what is described in Patent Documents 2 and 3 in addition to that described in Patent Document 1 has been proposed as similar to this type of elevator door safety device.

  In the techniques described in these Patent Documents 1 to 3, all of the doors are fully closed, assuming that a string-like foreign object, for example, a lead connected to a pet or a cord of a vacuum cleaner, etc. Sometimes, the safety shoes (including lever members having the same function) attached to the door overlap each other in the direction perpendicular to the surface of the door.

JP 2010-13224 A Japanese Patent Laid-Open No. 6-24675 JP 2000-44148 A

  However, in the techniques described in these Patent Documents 1 to 3, when the safety shoe attached to the door forms a parallel link mechanism with the door, the safety shoe moves forward and backward in the door opening / closing direction. At the same time, the displacement of the safety shoe in the vertical direction is accompanied. This means that, for example, when a foreign object is caught in a string in the door, it is impossible to detect the inclusion of the foreign object unless the tension that can lift the weight of the safety shoe is applied to the foreign object in a string shape. Means. Therefore, there is still room for improvement in making it easier to detect the trapping of the string-like foreign matter and improving detection accuracy and safety.

  The present invention has been made paying attention to such problems, and provides an elevator door safety device that makes it easier to detect string-like foreign matters and improves detection accuracy and safety. It is.

The invention according to claim 1 is a double door double door that opens and closes the entrance / exit of the elevator car in the left-right direction, and the front end surfaces of the doors that are brought into contact with each other when the door is fully closed An elevator door safety device for detecting that a foreign object is sandwiched between the movable members provided at the front ends of the doors, and a displacement detection means for individually detecting the displacement of the movable members. , And. In addition, the movable member is attached to each door so as to be rotatable about the vertical axis, so that the movable member moves forward and backward in the opening / closing direction of the door based on the rotation operation. , the doorway is fully closed by the both door, movable between members of each door is adapted to overlap on top of each other in terms perpendicular direction of the door. Furthermore, the first extension from the movable member provided on one of the doors is engaged with the groove on the sill side, and the second extension from the other door is engaged with the groove on the sill side. When the doorway is fully closed by the both doors, the first and second extension portions are overlapped with each other in the direction perpendicular to the surface of the door .

In this case, preferably, as described in claim 2 , for example, when the doorway is fully closed by the both doors, the other door provided with the second extension portion and the movable member on the other door side It is assumed that a movable member having the first extension portion on one door side enters between them.

For example, as described in claim 3 , the movable member also serves as a safety shoe, and as described in claim 4 , the movable member is a door other than the front end surface of each door. It shall protrude to the side.

  Therefore, in at least the first aspect of the present invention, when a string-like foreign object is sandwiched in the car-side door and a tension is applied to the string-like foreign substance, the vertical axis is formed while the movable member is pushed into the door side accordingly. It will be rotationally displaced around. Then, this rotational displacement is detected by the displacement detection means as the occurrence of pinching of the string-like foreign material, and for example, the door during the fully closing operation is immediately reversed.

  According to the present invention, since the displacement detecting means detects the forward / backward movement of the movable member due to the trapping of the string-like foreign matter as the rotational displacement of the movable member, it is affected by the weight of the rotational member. Therefore, it becomes easier to detect the entanglement of the string-like foreign matter, and the detection accuracy can be improved by reliably detecting the entanglement of the string-like foreign matter, and it can contribute to further improvement of safety.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a diagram showing a more specific first embodiment of an elevator door safety device according to the present invention, and is a front view of an elevator car in an entrance / exit fully closed state as viewed from the outside of the car 1. The expansion perspective view of the door-end vicinity of both the car side doors in FIG. The expanded sectional view along the AA line of FIG. The perspective view which expanded the principal part of FIG. (A) is a principal part perspective view of the site | part which adjoins the site | part of FIG. 4, (B) is a perspective view of the back side of the same figure (A). The expanded sectional view along the BB line of FIG. Sectional drawing along CC line of FIG. Operation | movement explanatory drawing at the time of pinching the string-like foreign material in a site | part equivalent to FIG. The flowchart which shows the control content in the main-control apparatus of FIG. FIG. 4 is a diagram illustrating a second embodiment of an elevator door safety device according to the present invention, and is a cross-sectional explanatory diagram illustrating another example of the swing bar illustrated in FIG. 3.

  1 to 9 show a more specific first embodiment for implementing an elevator door safety device according to the present invention. In particular, FIG. 1 shows an elevator car 1 in an entrance / exit fully closed state of the car 1. The front view seen from the outer side is shown. 2 is an enlarged perspective view in the vicinity of the door tips of both the car-side doors 3 and 4 in FIG. 1, and FIG. 3 is an enlarged cross-sectional view along the line AA in FIG.

  FIG. 2 shows the car side doors 3 and 4 in FIG. 1 cut in the height direction, and only the upper and lower portions and the center in the height direction of both doors 3 and 4 are extracted and drawn. Further, in FIGS. 3, 6, 7, 8, etc., the landing side doors that are close to both the car side doors 3, 4 are not shown.

  As shown in FIG. 1, an entrance 2 on the car 1 side for passengers to get on and off the car 1 is formed in the front surface of the car 1 of the elevator apparatus. This doorway 2 is opened and closed in the left-right direction by a first door 3 on the right side and a second door 4 on the left side. As shown in FIGS. A certain front end surface 3a is opposed to the front end surface 4a of the second door 4 in the door opening / closing direction. The door opening / closing system of the entrance / exit 2 on the side of the car 1 is a so-called double-opening type, and the door control device 6 drives the door motor 7 based on a command from the main control device 5 that manages the operation of the elevator. The doors 3 and 4 on the one side are opened and closed in the left-right direction.

  That is, both the doors 3 and 4 have closed the entrance / exit 2 by mutually abutting the front end surfaces 3a and 4a of both at the center position of the entrance / exit 2 in the width direction. The doorway 2 is opened when the 4 is slid and displaced in the directions away from each other. In addition, when the door opening / closing method is, for example, a one-side opening method using only the second door 4, the right first door 3 equivalent portion functions as a wall body such as a sleeve wall.

  Specifically, a first driven pulley 8 and a second driven pulley 9 are disposed opposite to each other in the door opening / closing direction on the front upper portion of the car 1, and an endless driven belt 10 is provided between the driven pulleys 8 and 9. Is wrapped around. And while the 1st door 3 is latched by the latching part 11 in the site | part spanned between the upper parts of both the driven pulleys 8 and 9 among the driven belts 10, both of the driven belts 10 The second door 4 is locked with a locking portion 12 at a portion spanned between the lower portions of the driven pulleys 8 and 9.

  Further, a drive pulley 13 is arranged on the same axis as the first driven pulley 8 arranged on the right side of the driven pulleys 8 and 9 in the front view shown in FIG. 1, and the drive pulley 13 and the first driven pulley are arranged. The pulley 8 rotates integrally. The door motor 7 rotates and drives the drive pulley 13 via the drive belt 14, so that the driven belt 10 rotates and thus both doors 3 and 4 are opened and closed.

  Further, as is well known, both doors 3 and 4 are suspended and supported by guide rails 15 provided above the entrance 2, and a pair of doors are provided at the lower ends of the doors 3 and 4, respectively. Guide shoes 16 are provided (see FIG. 7), and each door guide shoe 16 is guided by a threshold 17 provided along the width direction of the entrance 2.

  Here, as shown in FIGS. 2 and 3, swing bars 18 and 19 as movable members are respectively provided on the back side of the front ends of the doors 3 and 4. The swing bars 18 and 19 are made of, for example, aluminum and are long in length and are also used as safety shoes.

  The swing bar 18 of the first door 3 is arranged on the rear side of the front end of the first door 3 so as to overlap with the first door 3, and in the steady stationary position (steady stationary state) shown in FIGS. Two doors 4 protrude toward the door. As shown in FIG. 2, the swing bar 18 of the first door 3 is connected to hinge plates 21 of hinges 20 provided at two locations in the vertical direction in the first door 3, for example, and is a hinge pin that is a vertical axis. It can be swung or rotated about 22 as a rotation center. That is, the swing bar 18 of the first door 3 can be moved back and forth in the door opening / closing direction based on the above-described rotation operation with the stationary stationary position (steady stationary state) in FIG. 3 as the forward limit position.

  Further, as shown in FIGS. 3 and 4, an urging mechanism 23 is provided in the vicinity of the hinge 20 that supports the swing bar 18 of the first door 3. The urging mechanism 23 inserts and supports a guide rod 25 that can move forward and backward in a holder block 24 fixed to the first door 3, and a large-diameter head 25 a at the tip of the guide rod 25 and the holder block 24. A return spring 26, which is a compression coil spring, is interposed therebetween, and a head portion 25a at the tip of the guide rod 25 is brought into contact with the hinge plate 21 of the hinge 20. As a result, the swing bar 18 of the first door 3 is always elastically biased toward the stationary stationary position (steady stationary state) in FIG.

  On the other hand, the structure of the swing bar 19, the biasing mechanism 23 and the hinge 27 of the second door 4 shown in FIGS. 2 to 4 is basically the same as that of the first door 3 described above on the swing bar 18 side. The length of the hinge plate 28 in the hinge 27 is set longer than that of the hinge plate 21 on the hinge 20 side. As a result, the swing bar 19 of the second door 4 has a stationary stationary position (steady stationary state) in FIG. 3 as the forward limit position, and the door opening / closing direction is based on a pivoting operation with the hinge pin 29 that is the vertical axis as the rotational center. It is possible to move forward and backward.

  Here, since FIG. 3 shows the fully closed state of the entrance / exit 2 by both the doors 3 and 4, in this state, while the front end surfaces 3a and 4a of both the doors 3 and 4 are abutted, The swing bars 18 and 19 are set to overlap each other in the direction perpendicular to the planes of the doors 3 and 4 so as to overlap each other under a lap allowance Q. Further, each of the swing bars 18 and 19 may be formed of rubber or another flexible member due to its function.

  FIGS. 5A and 5B show the structure of a portion that is slightly closer to the upper side than the illustrated position in FIG. 3, which is a position corresponding to the cross section along line AA in FIG. As shown in FIG. 3, a substantially triangular rotating body 30 is arranged on the rear side of the swing bar 18 in the first door 3. The rotating body 30 is close to the rear end of the swing bar 18 and can swing around the pin 31 as a rotation center. The pin 31 passes through the panel 33 forming the first door 3, and as shown in FIG. 5B, another rotating body 32 sharing the pin 31 is provided on the back side of the panel. is there. The rotating body 32 shares the pin 31 with the rotating body 30, and the rotating body 30 and the other rotating body 32 are connected by a screw 35 that passes through a long hole 34 formed in the panel 33. Further, a micro switch 36 that uses the rotating body 32 as a dog is provided in the vicinity of the rotating body 32. The micro switch 36 functions as a displacement detection means of the swing bar 18 and includes a lever 36a as an actuator.

  Both of these rotating bodies 30 and 32 and the pin 31 shared by them are in a so-called coaxial integral relationship in which they cannot rotate relative to each other, and both of the rotating bodies 30 and 32 are integrated within the range of the elongated hole 34. Will rotate as. That is, in FIGS. 5A and 5B, when the swing bar 18 is displaced in the direction of the arrow a1, the rotating body 30 is rotationally displaced in the direction of the arrow a2 accordingly, and at the same time, the other rotating body 32 is moved in the direction of the arrow a3. It will be rotationally displaced in the direction. When the lever 36a of the micro switch 36 is pressed along with the rotational displacement of the rotating body 32, the micro switch 36 is turned on. The ON operation signal of the micro switch 36 is input to the emergency stop control device 37 of FIG. 1 as an emergency stop signal.

  5 is also provided at the same position of the second door 4 and at the lower part of both doors 3 and 4 in FIG. 1. In FIG. Only 36 is shown.

  6 shows an enlarged cross-sectional view taken along the line BB in FIG. 1, and FIG. 7 shows a cross-sectional view taken along the line CC in FIG.

  As described above, both the doors 3 and 4 are guided and supported by the sill 17 through the door guide shoe 16 so as to be slidable. As shown in FIGS. Apart from the guide groove 38 in which 16 is accommodated, an auxiliary guide groove 39 parallel to the guide groove 38 is provided in the sill 17.

As shown in FIGS. 2, 6, and 7, a locking piece 40 as a first extension protruding toward the sill 17 is attached to the lower end of the swing bar 18 in the first door 3 with a screw. Yes, this locking piece 40 is engaged with the auxiliary guide groove 39. On the other hand, with respect to the second door 4, a locking piece 41 as a second extension projecting toward the sill 17 side is attached to the lower end of the second door 4 itself, and this locking piece 41 is attached to the door guide shoe. 16 and the guide groove 38 are engaged.

  Thus, as is apparent from FIGS. 6 and 7, in the closed state of both doors 3, 4, that is, in the fully closed state of the entrance / exit 2 by both doors 3, 4, the front end surface 3 a of both doors 3, 4. , 4a are abutted with each other, and both locking pieces 40, 41 overlap each other in the direction perpendicular to the plane of each door 3, 4, so that they overlap each other under the lapping allowance Q1 in FIG. It is set to.

Here, if even the above-described overlapping relationship can be ensured, even the locking piece 40 attached to the swing bar 18 of the first door 3 is engaged with the guide groove 38 of FIGS. but it may also be in.

  According to the elevator door safety device configured as described above, for example, the door closing state of FIG. 8B from the middle of the door closing operation by both the doors 3 and 4 as shown in FIG. In the process of reaching the fully closed state of the doorway 2 by both doors 3 and 4, if a string-like foreign matter F exists between the doors 3 and 4, the doorway 2 shown in FIG. Since the swing bars 18 and 19 attached to the doors 3 and 4 overlap each other in the state, the string-like foreign matter F is caught between the swing bars 18 and 19. It will be caught.

  In this state, tension is applied to the string-like foreign matter F as shown in FIG. 3C regardless of whether the car 1 is before starting to move toward the destination floor or after starting to move. Then, both the swing bars 18, 19 or at least one of the swing bars 18 or 19 is rotationally displaced, and accordingly, the microswitch 36 of FIGS. 1 and 5 is turned on. The emergency stop control device 37 in FIG. 1 monitors the operating state of the micro switch 36. When the micro switch 36 is turned on, the emergency stop control device 37 immediately sends an emergency stop signal to the main control device 5 in FIG. Will be output.

  Further, as is well known, a gap of about several millimeters inevitably exists between the lower ends of the doors 3 and 4 and the sill 17, so that both doors 3 as shown in FIGS. , 4, the string-shaped foreign matter F may enter the gap between the lower ends of the doors 3, 4 and the sill 17. Also in this case, as shown in FIG. 6, when the doorway 2 is fully closed, the locking pieces 40 and 41 attached to the doors 3 and 4 overlap each other. F is sandwiched between the locking pieces 40 and 41. Therefore, as in the case of FIG. 8, when tension is applied to the string-like foreign matter F, the swing bar 18 attached to the first door 3 is rotationally displaced, and the micro switch 36 of FIG. An emergency stop signal is output to the main controller 37 of FIG.

  FIG. 9 shows an example of control contents of the main controller 5 of FIG. As shown in the figure, when both the doors 3 and 4 start the door closing operation (step S1) and the main controller 5 detects an emergency stop signal from the emergency stop controller 37 thereafter, The door control device 6 is immediately commanded to stop the door closing operation (steps S2 and S3). On the other hand, when the emergency stop signal is not detected, the doors 1 and 2 on the side of the car 1 are closed with the door closing operation. 2 is fully closed (step S6).

  If the door closing operation is stopped in step S3, the detection information based on the emergency stop signal is recorded (step S4), and a command is sent to the door control device 6 so that both doors 3 and 4 are reversed, that is, both The doors 3 and 4 are opened and the doorway 2 is fully opened (step S5). At the same time, an alarm signal is output, for example, a buzzer is sounded, a voice announcement is given, or a warning is given with a visual display on the display to inform the passenger that the operation has been forced to open ( In step S5) and thereafter, each operation after the door closing operation in step S1 is repeated. As a result, it is possible to release the string-like foreign substance F by opening the doors 3 and 4 as described above.

  If the emergency stop signal from the emergency stop control device 37 is detected in step S7 after the doorway 2 is fully closed based on the door closing operation of both the doors 3 and 4 in step S6, the process proceeds to step S4. The subsequent processing is executed. On the other hand, when the emergency stop signal from the emergency stop control device 37 is not detected in step S7, the process proceeds to the next step S8, and the car 2 moves toward the destination floor.

  Thereafter, when the emergency stop signal from the emergency stop control device 37 is detected in step S9 after the car 2 departs toward the destination floor, the car 2 is immediately stopped (step S10). Then, the car 2 is moved (returned) to the departure floor, and an alarm signal is output, for example, a buzzer is sounded or a voice announcement is made to notify the passengers that they will return to the departure floor once ( Step S11). Thereafter, after recording the detection information based on the emergency stop signal in step S12, the process proceeds to step S14 to open both doors 3 and 4. That is, after returning to the departure floor, the doorway 2 is fully opened based on the door opening operation of both the doors 3 and 4. Thereafter, each operation after the door closing operation in step S1 is repeated.

  As a result, it is possible to prevent the car 2 from continuing to run while the string-like foreign matter F is sandwiched between the doors 3 and 4, and both the doors 3 and 4 are the same as described above. With this door opening operation, it becomes possible to release the string-like foreign matter F from being caught.

  Further, after the car 2 departs toward the destination floor in step S8, the car 2 is in steady operation unless the emergency stop signal from the emergency stop control device 37 is detected in step S9. Arrives at the destination floor, the doorway 2 is fully opened based on the opening operation of both doors 3 and 4 (step S14). Thereafter, each operation after the door closing operation in step S1 is repeated.

  Therefore, according to the present embodiment, both swing bars 18 and 19 which are movable members are mounted on the respective doors 3 and 4 so as to be rotatable about the vertical axis, so that the rotation operation thereof is performed. The swing bars 18 and 19 are moved forward and backward in the opening and closing direction of the doors 3 and 4 when the door 2 is fully closed by the doors 3 and 4. Since they overlap each other in the direction perpendicular to the surface, unlike the conventional case, it is possible to reliably detect the trapping of the string-like foreign matter F without lifting the swing bars 18 and 19 upward. Safety will be further improved.

  A locking piece 40 that is an extension from the swing bar 18 provided on one door 3 faces the auxiliary guide groove 39 on the side of the sill 17 and a locking piece that is an extension from the other door 4. 41 faces the guide groove 38 on the side of the sill 17, and when the doorway 2 is fully closed by both doors 3, 4, both locking pieces 40, 41 overlap each other in the direction perpendicular to the plane of each door 3, 4. Since the string-like foreign matter F is sandwiched between the doors 3 and 4 and the sill 17 even if the string-like foreign matter F is sandwiched between the doors 3 and 4, the string-like foreign matter is not lifted up. The trapping of F can be reliably detected, and the safety of the elevator is further improved.

  Furthermore, according to the present embodiment, since both the swing bars 18 and 19 also serve as safety shoes as described above, even when foreign matter other than the string-like foreign matter F is caught, the foreign matter is caught. Needless to say, it can be reliably detected.

  FIG. 10 is a diagram showing a second embodiment of an elevator door safety device according to the present invention, and shows a modification of both swing bars 18 and 19 which are main components. In addition, the same code | symbol is attached | subjected to the part which is common in previous 1st Embodiment.

  The swing bar 18 on the first door 3 side shown in FIG. 10A is a combination of a base portion 44 made of extruded material made of aluminum or the like and a cushioning material 45 made of a flexible member such as rubber. . Although not shown, the swing bar 19 on the second door 4 side has the same structure.

  In this case, a receiving groove 46 having a C-shaped cross section is formed in a long base portion 44 having a uniform cross section, while a bead portion 47 having a circular cross section is formed in a long cushioning material 45 having a hollow uniform cross section. In addition, the receiving groove 46 on the base portion 44 side and the bead portion 47 on the cushioning material 45 side are concavo-convexly fitted. The cushioning material 45 is formed with a relatively shallow V-grooved easily deformable portion 48. The base portion 44 is fixed to the hinge plate 21 of the hinge 20 by rivets or the like.

  By doing so, as shown in FIG. 5B, the cushioning material 45 is easily deformed starting from the deepest portion of the easily deformable portion 48, and a buffering effect when the string-like foreign matter F is sandwiched can be expected. By the deformation mode of the cushioning material 45 as a whole and the grip force on the surface, it can be effectively transmitted as a force for rotating the hinge lever 21 regardless of the direction in which the string-like foreign matter F is applied. Further, the presence of the cushioning material 45 can be expected to provide a cushioning effect when the swing bar 18 functions as a safety shoe.

DESCRIPTION OF SYMBOLS 1 ... Car 2 ... Entrance / exit 3 ... 1st door 3a ... Front end surface 4 ... 2nd door 4a ... Front end surface F ... String-like foreign material 17 ... Sill 18 ... Swing bar (movable member)
19 ... Swing bar (movable member)
20 ... Hinge 22 ... Hinge pin (vertical axis)
27 ... Hinge 29 ... Hinge pin (vertical axis)
36 ... Micro switch (displacement detection means)
40 ... locking piece (first extension)
41 ... locking piece (second extension)

Claims (4)

The door of the elevator car is a double-open door that opens and closes in the left-right direction, and foreign objects are sandwiched between the front end surfaces of each door that will be abutted with each other when the door is fully closed An elevator door safety device for detecting
A movable member provided at the tip of each door;
Displacement detecting means for individually detecting the displacement of the movable member;
With
The movable member is attached to each door so as to be rotatable about the vertical axis, so that the movable member moves forward and backward in the opening and closing direction of the door based on the rotation operation.
When the doorway of both the doors is fully closed, the movable members of each door overlap each other in the direction perpendicular to the surface of the door and overlap each other.
While the first extension from the movable member provided on either door is engaged with the groove on the sill side,
The second extension from the other door is engaged with the groove on the sill side,
The elevator door safety device according to claim 1, wherein the first and second extensions overlap each other in the direction perpendicular to the surface of the door when the doorway is fully closed by both doors . The movable member having the first extension on one door side between the other door on which the second extension is provided and the movable member on the other door side when the doorway is fully closed by both doors. elevator door safety device according to claim 1, characterized in that so enters. 3. The elevator door safety apparatus according to claim 1, wherein each of the movable members also serves as a safety shoe . The elevator door safety device according to claim 3, wherein the movable member protrudes from the front end surface of each door to the other door side .

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