WO2005090219A1

WO2005090219A1 - Safety device of door of elevator

Info

Publication number: WO2005090219A1
Application number: PCT/JP2004/003530
Authority: WO
Inventors: Mamoru Yamada; Satiomi Mizuno
Original assignee: Mitsubishi Denki Kabushiki Kaisha
Priority date: 2004-03-17
Filing date: 2004-03-17
Publication date: 2005-09-29

Abstract

A safety device of the door of an elevator capable of suppressing the occurrence of defective breakage of a cable for transmitting an output from a photoelectric detector to the control device of a door drive device by preventing the cable from being bent by the opening/closing movements of the door and also capable of increasing abnormality detection accuracy by securely detecting the operation of a movable edge part. The safety device comprises the movable edge part and the photoelectric detector formed of a light emitting device and a light receiving device. The movable edge part is disposed at the side-edge parts of door side walls in the door closing direction through their generally overall length in a direction orthogonal to the door opening/closing directions, held, in a stationary state, at a position extended a specified amount from the end face of the door in the door closing direction, and moving, when a pressing force in the door opening direction acts thereon, in the door opening direction while shifting in a direction orthogonal to the door opening/closing directions to operate so as to reduce the extended amount from the end face of the door in the door closing direction. The photoelectric detector fitted to an entrance member in the door opening/closing directions to form an optical path so that, when the movable edge part is positioned in the stationary state, the optical path crosses an entrance in the door opening/closing directions and, when the movable edge part is operating, the optical path is shielded.

Description

Description Elevator door safety device Technical field

The present invention relates to an elevator door safety device in a door device in which a chin door and a landing door open and close synchronously. Background art

Conventional elevator door safety devices include, as described in, for example, Japanese Patent Application Laid-Open No. Hei 6-316692, a floodlight provided on the side wall of the landing of one of the car doors, and the other car door. And a photodetector provided on the side wall surface of the landing. The detector is configured to operate when light emitted from the light emitter toward the light receiver is blocked by a passenger or the like. A movable edge is provided along the edge of the car door in the door closing direction.

The conventional elevator door safety device configured as described above requires a cable for transmitting the abnormality detection output of the detector to the control device of the Too moving device. This cable is usually routed using a link that opens and closes the door as a guide to avoid interference with other equipment. However, since the detector was mounted on a movable car door, the cable would bend each time the door was opened and closed, which could cause a disconnection failure.

In addition, since the operation of the detector is not linked to the operation of the movable edge arranged along the edge of the car door on the door closing direction side, only abnormalities at the detector installation position can be detected. The detection accuracy has been reduced. Disclosure of the invention

According to the present invention, a photoelectric detector that detects an abnormality by blocking an optical path is provided at an entrance / exit member, and the optical path of the photoelectric detector is blocked by an operation of a movable edge.

The cable for transmitting the output of the photoelectric detector to the control device of the door drive unit is connected to the door. An elevator door safety device that can prevent the occurrence of disconnection failure of the cable by wiring so that it does not bend due to the opening and closing operation, and can detect the operation of the movable edge more reliably and improve the accuracy of abnormality detection. is there. .

A door safety device for an elevator according to the present invention includes: a door that opens and closes an entrance of an elevator; a door drive device that opens and closes the door; and a side edge of a side wall of the door in a door closing direction in a direction orthogonal to the door opening and closing direction. It is disposed over substantially the entire length, and in a steady state, is held at a position extending a predetermined amount from the end face in the door closing direction of the door, and a pressing force in the door opening direction acts to orthogonally cross the door opening and closing direction. A movable edge that moves in the door opening direction while being displaced in the direction to reduce the amount of extension of the door from the end face in the door closing direction, and when the movable edge is located in a steady state, When the movable edge is operating, the photoelectric system comprises a projector and a light receiver attached to the door member in the door opening and closing direction so as to form an optical path so as to be blocked when the movable edge is operating. Kanya device and, Kihikariro is receiving a detection output of the photoelectric type detector when blocked, Ru der those and a control device for controlling the door drive device so as to opening operation of the door. Brief Description of Drawings

FIG. 1 is a front view of a door side showing an elevator door safety device according to Embodiment 1 of the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG.

Fig. 3 is a view of the area around the floodlight of the door safety device in Fig. 1 as viewed from the direction A.

Fig. 4 is a view of the area around the optical axis hole of the movable edge of the door safety device in Fig. 1 as viewed from the direction B.

FIG. 5 shows an elevator door safety device according to Embodiment 2 of the present invention; FIG.

FIG. 6 is a sectional view taken along the line VI-VI of FIG.

FIG. 7 is a 7k plan sectional view showing an elevator door safety device according to Embodiment 3 of the present invention.

Fig. 8 shows the light shield plate mounting part of the door safety device of the elevator in Fig. 7 viewed from the C direction. FIG.

FIG. 9 is a perspective view of a principal part showing a periphery of a light shielding plate of a door safety device for an elevator according to a third embodiment of the present invention.

FIG. 10 is a car side front view showing a door safety device for an elevator according to a fourth embodiment of the present invention.

FIG. 11 is a car-side front view showing a main part of an elevator door safety device according to Embodiment 5 of the present invention.

FIG. 12 is a car side front view showing an elevator door safety device according to Embodiment 6 of the present invention.

FIG. 13 is a cross-sectional view taken along the line XII-XIII in FIG.

FIG. 14 is a car side front view showing an elevator door safety device according to Embodiment 7 of the present invention.

FIG. 15 is a diagram illustrating a power mechanism in an elevator door safety device according to Embodiment 7 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.

Embodiment 1

FIG. 1 is a car side front view showing an elevator door safety device according to Embodiment 1 of the present invention, FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 1, and FIG. 3 is around a floodlight of the door safety device in FIG. Fig. 4 is a view of the vicinity of the optical axis hole of the movable edge of the door safety device in Fig. 1 as viewed from the direction B.

In FIGS. 1 to 4, the car room 1 is configured by assembling a peripheral wall and a ceiling on a car floor 2. A rail 6 extends in the door opening / closing direction on a girder 5 provided at the upper edge of the entrance 4 of the cab 1, and doors 3a and 3b are suspended from the rail 6 via a door hanger 7. It is guided by rails 6 to open and close doorway 4. A threshold 8 for guiding legs (not shown) provided at the lower ends of the doors 3 a and 3 b is provided at the lower edge of the entrance 4.

The door drive device 9 is provided on the girder 5, and drives the two doors 3a and 3b to open and close. this In this case, the door 3a on the cab 1 side opens and closes at a low speed, and the landing side door 3b opens and closes at a high speed because it is a two-sided sliding door.

The movable edge 10 is formed in a U-shaped cross section, with the U-shaped opening facing the door opening direction, and extending over almost the entire height along the edge of the landing side wall (side wall) of the door 3b in the door closing direction. It is arranged. The first link 11 has one end pivotally connected to the movable edge 10 and the other end pivotally connected to the landing side wall surface of the door 3b, and is disposed near the upper end of the movable edge 10. The second link 12 has one end pivotally connected to the movable edge 10 and the other end pivotally attached to the landing side wall surface of the door 3b, and is disposed near the lower end of the movable edge 10. Note that the first link 11 and the second link 12 are arranged in parallel with each other. Then, the pressing spring 13 is attached to the door 3 b so as to urge the second link 12 around the axis 14 b in a predetermined direction, and the stopper 15 comes into contact with the second link 12 to move the movable edge 1. The door 3b is attached to the door 3b so as to regulate the amount of protrusion of the door 3b from the end face in the door closing direction.

As a result, the second link 12 is rotated counterclockwise around the shaft 14b in FIG. 1 by the urging force of the pressing spring 13 and comes into contact with the stopper 15 to stop. Further, the first link 11 is rotated around the shaft 14 a in conjunction with the rotation of the second link 12. Therefore, the movable edge 10 moves in the door closing direction while being displaced downward, and is kept in a state of protruding a predetermined amount from the end face of the door 3b in the door closing direction (steady state). When the force in the door opening direction acts on the movable edge 10, the movable edge 10 moves so as to reduce the amount of protrusion from the end face in the door closing direction against the urging force of the pressing spring 13. At this time, the first link 11 and the second link 12 rotate clockwise around the axes 14a and 14b in FIG. 1, and the movable edge 10 is displaced upward. It will operate to move in the door opening direction. Therefore, the length of the movable edge 10 is adjusted so as not to hinder the vertical displacement in the operation of the movable edge 10.

The transmitter 16 of the photoelectric detector is installed on the column 18 of the doorway 4 in the door closing direction. Here, since the door 3b comes into contact with the pillar 18 when the door is fully closed, as shown in FIG. 2 and FIG. 3, the floodlight 16 turns the light exit direction toward the door opening direction as shown in FIGS. It is installed on the back of the pillar 18 in the direction of closing the door, and the emitted light passes through the optical axis hole 20 formed in the pillar 18. Also, as shown in FIG. 2, the light receiver 17 of the photoelectric sensor faces the light emitter 16 with the light receiving surface facing the door closing direction and the movable edge 10 therebetween. The door 4 of the entrance 4 is installed on the pillar 19 in the direction of Hi. Further, as shown in FIGS. 2 and 4, an optical axis hole 21 is formed at the bottom of the movable edge 10. Thus, when the movable edge 10 is in the steady state, the light emitted from the optical device 16 passes through the optical axis holes 20 and 21 and is received by the light receiver 17 . When the movable edge 10 operates, the optical axis hole 21 is displaced upward. Then, when the optical axis hole 21 deviates from the optical path 22, the optical path 22 is blocked by the movable edge 10, and the light receiver 17 cannot receive the light emitted from the light emitter 16, and the abnormality detection signal is output. Output.

The abnormality detection signal from the photoelectric detector is transmitted from the photodetector 17 along the column 19 to the control device 24 installed on the girder 5 and at a required position by a tap (not shown). ) Is transmitted to the control device 24 via the cable 23 fixed and wired to the pole 19 by some means. Then, upon receiving the abnormality detection output from the photoelectric detector, the control device 24 outputs a reversing door opening command to the door driving device 9, interrupts the door closing operation of the doors 3a and 3b, and opens the door. Let it.

As described above, according to the first embodiment, the light emitter 16 and the light receiver 17 constituting the photoelectric detector are attached to the doorway members, that is, the columns 18 and 19 on both sides of the doorway of the doorway 4 in the door opening and closing direction. Since it is attached, the cable 23 that transmits the abnormality detection signal of the photoelectric detector to the control device 24 is connected to the fixed pillar 19, avoiding movable bodies such as the doors 3a and 3b. Can be wired along. Therefore, the cable 23 does not bend due to the opening and closing operations of the doors 3a and 3b, the occurrence of disconnection is suppressed, and an abnormality can be stably detected over a long period of time.

Further, since the optical path 22 of the photoelectric detector is configured to be interrupted by the operation of the movable edge 10, the operation of the movable edge 10 can be reliably detected, and the abnormality detection accuracy can be increased. .

Furthermore, even if the movable edge 10 is in the steady state, an abnormality can be detected when an object such as a passenger or luggage blocks the optical path 22 of the photoelectric detector, so that an object such as a passenger or luggage can be detected. Can also be prevented from hitting the door 3b during the door closing operation. Also, movable edge

By pressing 10 to detect an abnormality, the doors 3a and 3b can be reversed to open the door at any time.

Note that, in the first embodiment, a description is given of a two-sided sliding door of a horizontal sliding type. However, the horizontal sliding type single sliding door is not limited to the double sliding door, and the same effect can be obtained by applying to a single sliding door or a triple sliding door, for example.

Further, in the first embodiment, a description has been given assuming that a pair of the light emitter 16 and the light receiver 17 are used as the photoelectric detector, but a plurality of pairs of the light emitter 16 and the light receiver 17 are connected to the movable edge 1. The columns 18 and 19 may be provided side by side in the height direction so as to face each other. In this case, a plurality of optical paths 22 for detection are provided in the height direction, so that the detection accuracy can be further improved.

Embodiment 2

FIG. 5 is a car side front view showing a door safety device for an elevator according to a second embodiment of the present invention, and FIG. 6 is a sectional view taken along the line VI-VI in FIG.

In FIGS. 5 and 6, doors 30a and 3Ob are two-sided sliding doors, each of which is hung on a rail 6 via a door-to-hanger 7. The doors 30a and 3Ob are guided by the rail 6 by the door driving device 9A to open and close the doorway 4.

The movable edge 10 is arranged over almost the entire height at the edge of the side wall of the door 30a in the door closing direction with the U-shaped opening facing the door opening direction. One end of the first link 11 is pivotally connected to the movable edge 10, and the other end is pivotally connected to the landing side wall surface of the door 30 a, and is disposed near the upper end of the movable edge 10. The second link 12 has one end pivotally connected to the movable edge 10 and the other end pivotally attached to the landing side wall surface of the door 30a, and is disposed near the lower end of the movable edge 10. Note that the first link 11 and the second link 12 are arranged in parallel with each other. Then, the pressing spring 13 is attached to the door 30a so as to urge the second link 12 around the axis 14b in a predetermined direction, and the stopper 15 comes into contact with the second link 12 to move the movable edge. The door 30a is attached to the door 30a so as to regulate the amount of protrusion of the door 30a from the end face in the door closing direction.

As a result, the second link 12 is rotated counterclockwise around the shaft 14b in FIG. 5 by the urging force of the pressing spring 13 and comes into contact with the stopper 15 to stop. Further, the first link 11 is rotated around the shaft 14 a in conjunction with the rotation of the second link 12. Therefore, the movable edge 10 moves in the door closing direction while being displaced downward, and is kept in a state of protruding a predetermined amount from the end face of the door 30a in the door closing direction (steady state). And the force in the door opening direction Acts on the movable edge 10, the movable edge 10 moves so as to reduce the amount of protrusion from the end face in the door closing direction against the urging force of the pressing spring 13. At this time, the first link 11 and the second link 12 rotate clockwise around the axes 14a and 14b in FIG. 5, and the movable rim 10 is displaced upward and the door is opened. Acts to move in the direction.

In addition, the movable edge 10 is similarly disposed at the edge of the side wall of the door 30b in the door closing direction.

Then, the light emitter 16 and the light receiver 17 of the photoelectric detector are arranged so that the light emitting surface and the light receiving surface face each other, and the columns 18 on both sides in the door opening and closing direction of the doorway 4 across the movable edge 10. , 19 are installed. Further, the optical axis holes 31 and 32 are formed at the bottom of the movable edge 10 located in the steady state so as to coincide with the optical path 22. Thus, when the movable edge 10 is in the steady state, the light emitted from the light emitter 16 passes through the optical axis holes 31 and 32 and is received by the light receiver 17. When the movable edge 10 is operated, the optical axis holes 31 and 32 are displaced upward. When the optical axis holes 31 and 32 deviate from the optical path 22, the optical path 22 is blocked by the movable edge 10, and the light receiver 17 cannot receive the light emitted from the light emitter 16.

The abnormality detection signal from the photoelectric detector is fixed to the pole 19 by a clip (not shown) or the like at the required position so as to reach the control device 24 along the pole 19 from the receiver 17. It is transmitted to the control device 24 via the cable 23 wired. When the controller 24 receives the abnormality detection output from the photoelectric detector, the controller 24 outputs a reversing door opening command to the door driving device 9A, and interrupts the door closing operation of the doors 30a and 30b. Open the door. Therefore, also in the second embodiment, the same effect as in the first embodiment can be obtained.

In addition, since the doors 30a and 30b are two-sided double sliding doors, there is no need to install the light emitter 16 and the light receiver 17 on the back of the pillars 18 and 19. Installation work and position adjustment work of the light emitter 16 and the light receiver 17 are facilitated.

In the above-mentioned Embodiment 2, the double sliding door of the horizontal sliding type is described, but the double sliding door of the horizontal sliding type is not limited to the double double sliding door, and is applied to, for example, a double double sliding door. The same effect can be obtained.

In the second embodiment, a pair of the light emitter 16 and the light receiver 16 are used as the photoelectric detector. Although it has been described that the optical device 17 is used, a plurality of pairs of the light emitters 16 and the light receivers 17 are arranged side by side on the columns 18 and 19 so as to face each other with the movable edge 10 therebetween. You may. In this case, a plurality of optical paths 22 for detection are provided in the height direction, so that the detection accuracy can be further improved.

Embodiment 3.

FIG. 7 is a horizontal cross-sectional view showing an elevator door safety device according to Embodiment 3 of the present invention, FIG. 8 is a view of a light shielding plate mounting portion of the elevator door safety device in FIG. FIG. 9 is a perspective view of a principal part showing a periphery of a light shielding plate of an elevator door safety device according to a third embodiment of the present invention.

7 to 9, the light emitter 16 and the light receiver 17 of the photoelectric detector are arranged so that the light emitting surface and the light receiving surface face each other, and the columns 18, 1 on both sides in the door opening and closing direction of the entrance 4. 9 is installed. Then, an optical path 22 emitted from the light emitter 16 and reaching the light receiving surface of the light receiver 17 is located close to the movable edge 10 on the landing side of the movable edge 10. Further, the light shielding plate 33 is provided at each movable edge 10 so as to block the optical path 22 when moving upward from the steady state.

The other configuration is the same as that of the second embodiment.

In the third embodiment, when the movable edge 10 is in the steady state, the light emitted from the light emitter 16 is received by the light receiver 17. When the movable edge 10 is operated, the light shielding plate 33 is displaced upward. When the light shielding plate 33 blocks the optical path 22, the light receiver 17 cannot receive the light emitted from the light emitter 16. Then, the abnormality detection signal from the photoelectric detector is transmitted to the control device 24 along the post 19 from the photodetector 17 and to the post 19 at a required position by a clip (not shown) or the like. The data is transmitted to the control device 24 via the cable 23 fixed and wired. Then, upon receiving the abnormality detection output from the photoelectric detector, the control device 24 outputs a reversing door opening command to the door driving device 9A to interrupt the door closing operation of the doors 30a and 30b. And open the door.

Therefore, also in the third embodiment, the same effect as in the second embodiment can be obtained.

Further, in the third embodiment, since the light shielding plate 33 is disposed on the movable edge 10 so as to block the optical path 22 when the movable edge 10 is operated, an optical axis hole is formed in the movable edge 10. Must be set up There is no need to obtain an elevator with excellent design.

Embodiment 4.

In FIG. 10, the light emitter 16 and the light receiver 17 of the photoelectric detector are installed on the column 18 of the doorway 4 of the doorway 4 in the direction of closing the door, and are vertically separated from each other. Since the door 3b comes into contact with the pillar 18 when the door is fully closed, the floodlight 16 is installed on the back of the pillar 18 with the light emitting direction facing the door opening direction, and the optical axis hole 34 comes out. It is drilled in the pillar 18 to allow the light to pass through. When the movable edge 10 is positioned in a steady state, the optical axis hole 35 is formed at the bottom of the movable edge 10 so that the light emitted from the projector 16 passes therethrough. 38a is arranged in the movable edge 10 so that the emitted light passing through the optical axis hole 35 is reflected upward (in a direction orthogonal to the direction of opening and closing the door) at an angle of 90 degrees. Also, the second reflecting mirror 38b is disposed in the movable edge 10 so as to reflect the emitted light reflected by the first reflecting mirror 38a in a direction of closing the door by changing the angle by 90 degrees. I have. Further, the optical axis hole 36 is formed at the bottom of the movable edge 10 so as to pass the light reflected by the second reflecting mirror 38b, and the optical axis hole 37 passes through the optical axis hole 36. The pillar 18 is provided so as to pass the emitted light. The light receiver 17 is disposed on the column 18 so that the light receiving surface faces the door opening direction and receives the outgoing light passing through the optical axis hole 37. Also, the cable 23 should be connected to the control device 24 installed on the spar 5 along the column 18 from the receiver 17 and to the column 18 by a clip (not shown) at a required position. It is fixed and wired.

The other configuration is the same as that of the first embodiment.

In the fourth embodiment, when the movable edge 10 is in the steady state,

The light emitted from 6 in the door opening direction passes through the optical axis holes 3 4 and 3 5 and reaches the movable edge 10. The light is reflected upward by the first reflecting mirror 38 a, and then the second reflecting mirror 38. After being reflected in the direction of closing the door at b, it passes through the optical axis holes 36 and 37 to form an optical path 22 to the optical receiver 17.

Then, an object such as a passenger or luggage hits the movable edge 10, and when the movable edge 10 operates, the optical axis holes 35, 36 are displaced upward. And the optical axis holes 3 5 and 3 6 are the optical path 2 2 When the optical path 22 deviates from the optical path 22, the optical path 22 is blocked by the movable edge 10 and the light receiver 17 cannot receive the light emitted from the light emitter 16 and outputs an abnormality detection signal.

Also, even when the movable edge 10 is in the steady state, an object such as a passenger or a luggage may be in the optical path 22 between the optical axis holes 34, 35 or the optical path 22 between the optical axis holes 36, 37. If the light is blocked, the light receiver 17 cannot receive the light emitted from the light emitter 16 and outputs an abnormality detection signal.

Then, the abnormality detection signal from the photoelectric detector is transmitted to the control device 24 via the cable 23. Then, upon receiving the abnormality detection output from the photoelectric detector, the control device 24 outputs a reversing door opening command to the door driving device 9, interrupts the door closing operation of the doors 3a and 3b, and opens the door. Let it.

Therefore, also in the fourth embodiment, the same effect as in the first embodiment can be obtained.

In addition, since the two optical paths 22 for abnormality detection are configured using the projector 16 and the light receiver 17 of a pair, the detection accuracy can be improved with an inexpensive configuration.

'In addition, since the light emitter 16 and the light receiver 17 are provided on the pillar 18 in the door closing direction, the pillar 19 in the door opening direction is not required, the number of parts is reduced, and the cost is reduced accordingly. Embodiment 5

In FIG. 11, the light emitter 16 and the light receiver 17 of the photoelectric detector are installed on the pillar 18 of the doorway 4 of the doorway 4 in the direction of closing the door, and are vertically separated from each other. The floodlight 16 is installed on the back of the pillar 18 with the light emitting direction facing the door opening direction, and is drilled in the pillar 18 so that the optical axis hole 39 passes the emitted light. Further, a light receiver 17 is provided on the pillar 18 with the light receiving surface facing the door opening direction.

Then, when the movable edge 10 is positioned in the steady state, the

The first reflector 41a is formed at the bottom of the movable edge 10 so as to pass the light emitted from the optical axis 6, and the first reflecting mirror 41a changes the angle of the emitted light passing through the optical axis hole 40 by 90 degrees upward (doors). It is disposed inside the movable edge 10 so as to reflect in the direction perpendicular to the opening / closing direction. Also, the second reflector

4 1b changes the angle of the outgoing light reflected by the first reflecting mirror 4 1a by 90 degrees to the door closing direction It is disposed within the movable edge 10 so as to reflect light. Further, the optical axis hole 40 is formed in the pillar 18 so as to pass the light reflected by the second reflecting mirror 41b. Also, the third reflecting mirror 41c is disposed inside the column 18 so that the emitted light passing through the optical axis hole 39 is reflected upward at an angle of 90 degrees, and the fourth reflecting mirror 41d However, it is arranged in the column 18 so that the emitted light reflected by the third reflecting mirror 41c is changed in the angle of 90 degrees and reflected in the door opening direction. The optical axis holes 39 and 40 are formed in the bottom of the column 18 and the movable edge 10 so as to pass the light reflected by the fourth reflecting mirror 41d. Similarly, the fifth to tenth reflecting mirrors 4 1 e to 41 j are disposed in the movable edge 10 and the column 18, and the optical axis holes 39 and 40 are connected to the sixth reflecting mirror 41 f and The bottom of the movable edge 10 and the column 18 are formed so as to allow the light reflected by the eighth reflecting mirror 41 h and the tenth reflecting mirror 41 j to pass therethrough.

The other configuration is the same as that of the fourth embodiment.

In the fifth embodiment, when the movable edge 10 is in the steady state,

The light emitted in the direction of opening the door from 6 is reflected by the first to tenth reflecting mirrors 41 a to 41 j at an angle of 90 degrees, respectively, and is reflected by the column 18 and the movable edge 10. 3 round trips between

The optical path 22 leading to 17 is constituted.

Then, an object such as a passenger or luggage hits the movable edge 10, and when the movable edge 10 operates, the optical axis hole 40 is displaced upward. Then, when the optical axis hole 40 deviates from the optical path 22. The optical path 22 is blocked by the movable edge 10 so that the light receiver 17 cannot receive the light emitted from the light emitter 16 and outputs an abnormality detection signal. I do.

Even if the movable edge 10 is in the steady state, if an object such as a passenger or luggage blocks the optical path 22 between the optical axis holes 39 and 40, the light receiver 17 emits from the light emitter 16 The received light cannot be received, and an error detection signal is output.

Therefore, also in the fifth embodiment, the same effect as in the fourth embodiment can be obtained. In addition, since the optical paths 22 for detecting the six abnormalities are formed by using the projector 16 and the light receiver 17 of a pair, the detection accuracy can be further improved with an inexpensive configuration. Embodiment 6

FIG. 12 is a car-side front view showing an elevator door safety device according to Embodiment 6 of the present invention, and FIG. 13 is a cross-sectional view taken along the line XII-XII of FIG.

In Figs. 12 and 13, doors 45a and 45b are double-sliding doors that can be pulled up and down, in a direction perpendicular to the opening and closing direction of doorway 2 (horizontal direction). , 43 are arranged to be able to move up and down via rollers 44. Further, a door drive device 9B is disposed on one side of the girder 5 in a direction orthogonal to the door opening / closing direction of the doors 45a, 45b, and the pulley 46 is a girder 5 door 45a, 4g. It is located on the other side in the direction perpendicular to the door opening and closing direction of 5b. Further, a pair of pulleys 47a and 4.7b are arranged on both sides of the upper edge of the door 45a in a direction perpendicular to the opening and closing direction of the door.

Then, a first rope 48 a is fixed at one end to the counterweight 49, and is wound around the pulley 46 and the sheave 9 a of the door drive device 9 B, and then a pair of pulleys 4 7 a, 4 7 After being hung on b, it is hung on a pulley 46, and the other end is fixed to a weight 49. In addition, one end of the second rope 48 b force is fixed to one side of the upper end of the door 45 b in a direction orthogonal to the opening and closing direction of the door 45 b, and is wound around the sheave 9 a and the pulley 46 of the door driving device 9 B. After that, the other end is fixed to the weight 49. Furthermore, one end of the third rope 48c is fixed to the other side of the upper end of the door 45b in a direction perpendicular to the opening and closing direction of the door, and after being wound around the pulley 46, the other end is balanced. It is fixed to. Thus, the doors 45a and 45b open and close the doorway 4 by the door drive device 9B.

The movable edge is arranged over the entire width at the edge of the side wall of the door 45b with the U-shaped opening facing the door opening direction (upper) and the door closing direction (lower) edge. I have. One end of the first link 11 is pivotally connected to the movable edge 10 and the other end is pivotally connected to the landing side wall surface of the door 45b, and is orthogonal to the opening and closing direction of the movable edge 10. It is located near one end in the direction. In addition, one end of the second link 12 is pivotally connected to the movable edge 10 and the other end is pivotally connected to the landing side wall surface of the door 45 b in a direction perpendicular to the opening and closing direction of the movable edge 10. It is located near the edge. Note that the first link 11 and the second link 12 are mutually Are arranged in parallel with each other. Then, the push spring 13 is attached to the door 45 b so that the second link 12 urges the second link 12 around the shaft 14 b in a predetermined direction, and the stopper 15 comes into contact with the second link 12. The movable edge 10 is attached to the door 45b so as to define the amount of protrusion of the door 45b from the end face in the door closing direction.

As a result, the second link 1 2 is pushed by the biasing force of the push spring 13 in FIG.

4 Rotated counterclockwise around b, abuts stopper 15 and stops. In addition, the first link 11 rotates about the shaft 14 a in conjunction with the rotation of the second link 12. Thus, the movable edge 10 moves in the door closing direction while being displaced to the other side in the horizontal direction, and is kept in a state of protruding a predetermined amount from the end surface of the door 45b in the door closing direction (steady state). When the force in the door opening direction acts on the movable edge 10, the movable edge 10 moves so as to reduce the amount of protrusion from the door closing direction end face against the urging force of the pressing spring 13. At this time, the first link 11 and the second link 12 rotate clockwise around the axes 14a and 14b in FIG. 12, and the movable edge 10 is moved to one side in the horizontal direction. Operates to move in the door opening direction while displacing.

Then, the transmitter 16 and the receiver 17 of the photoelectric detector are separated from each other in the direction (horizontal direction) perpendicular to the door opening / closing direction on the landing side end surface of the car floor 2 located at the lower edge of the entrance 4. is set up. The floodlight 16 is installed on the landing side end of the car floor 2 with the light emission direction facing the door opening direction (upward), and is mounted on the extension of the threshold 8 so that the optical axis hole 50 passes through the emitted light. Has been drilled. When the movable edge 10 is positioned in a steady state, the optical axis hole 5 is formed at the bottom of the movable edge 10 so that the light emitted from the projector 16 passes therethrough. 4 Displaced inside movable edge 10 so that a changes the 90 degree angle of emitted light that has passed through optical axis hole 51 and reflects it to the other side (horizontal direction other side) in the direction orthogonal to the door opening and closing direction. Is established. In addition, the output light reflected by the second reflecting mirror 54b is arranged in the movable edge 10 so that the emitted light reflected by the first reflecting mirror 54a is reflected in the direction of closing the door (downward) by changing the angle by 90 degrees. Is established. Further, an optical axis hole 52 is formed in the bottom of the movable edge 10 so as to pass the light reflected by the second reflecting mirror 54b, and the optical axis hole 53 is formed in the optical axis hole.

It is bored in the extension of the threshold 8 so as to pass the light that has passed through 52. The light receiver 17 is disposed on the landing-side end surface of the car floor 2 so that the light receiving surface faces the door opening direction (upward) and receives the light emitted through the optical axis hole 53. . Also, Bull 2 3 force From the light receiver 17 to the control device 24 installed on the spar 5 along the end face of the car floor 2 and the pillar 4 3, and at the required position with a clip (not shown) etc. The wiring is fixed to the floor 2 and pillars 4 3 (entrance and exit members).

In the sixth embodiment, when the movable edge 10 is in the steady state, the light emitted from the light emitter 16 passes through the optical axis holes 50 and 51 and the first and second reflecting mirrors 5 After being reflected at 4 a, the light passes through the optical axis holes 52 and 53 to form an optical path 22 which is received by the optical receiver 17. Also, an object such as a passenger or luggage hits the movable edge 10, and when the movable edge 10 is operated, the optical axis holes 51 and 52 are displaced to one side in the horizontal direction. If the optical axis holes 51 and 52 deviate from the optical path 22, the optical path 22 is blocked by the movable edge 10, and the light receiver 17 cannot receive the light emitted from the light emitter 16, and the abnormality is detected. Output signal.

The abnormality detection signal from the photoelectric detector is transmitted from the light receiver 17 to the control device 24 via the cable 23. Then, upon receiving the abnormality detection output from the photoelectric detector, the control device 24 outputs a reversing door opening command to the door driving device 9B, and interrupts the door closing operation of the doors 45a and 45b. And open the door.

Therefore, also in the sixth embodiment, the same effect as in the first embodiment can be obtained.

In the sixth embodiment, the light emitter 16 and the light receiver 17 are horizontally separated from each other on the end face of the car floor 2 at the landing side, and the light receiver 1 passes through the movable edge 10 from the light emitter 16. Returning to optical path 22 Returning force that constitutes optical path 2 Transmitter 16 is arranged on the end face of car floor 2 at the landing side of car floor 2, and receiver 17 is positioned opposite movable emitter 16 with movable edge 10 interposed. 5 to form an optical path from the light emitter 16 through the movable edge 10 to the light receiver 17.

Further, in the sixth embodiment, when the movable edge 10 is operated, the optical path 22 from the light emitter 16 to the light receiver 17 is provided with the optical axis holes 51, 52 formed at the bottom of the movable edge 10. As in the third embodiment, a light-shielding plate is attached so as to extend from the movable edge 10 to the landing side, and when the movable edge 10 is activated, light is received from the light emitter 16. Optical path 22 to vessel 17 is configured to be shielded by a light-shielding plate attached to movable edge 1 ° Embodiment 7

Fig. 14 is a car side front view showing an elevator door safety device according to Embodiment 7 of the present invention, and Fig. 15 illustrates a cam mechanism in the elevator door safety device according to Embodiment 7 of the present invention. FIG.

In FIGS. 14 and 15, the movable edge mounting base 55 has a rectangular flat plate shape, and a pair of guide arms 55 a are parallel to the short sides from both ends of the long side of the movable edge mounting base 55. Has been extended. Also, a pair of guide cylinders 56 with low friction material adhered to the inside are fixed to the landing side wall surface of the door 3b with the axial direction aligned with the door opening / closing direction and separated vertically. . The movable edge mounting base 55 is mounted movably in the door opening and closing direction along the landing side wall surface of the door 3b by inserting each guide arm 55a into the guide cylinder 56.

As shown in FIG. 15, the cam 57 has a sector shape including an arc portion having a radius r 1 and an arc portion having a radius r 2 (r 2 <r 1) continuously formed on both sides of the arc portion. Cam section

58 and an arm 59 extending from the base of the cam 58. The upright side 58 a extends to the tip edge of the cam 58 along the shape of the tip of the cam 58. The cam 57 is pivotally attached to the landing side wall of the door 3 with a pin 6◦ at the base side of the cam portion 58. The link 61 is pivotally attached at one end to the tip of the arm portion 59, and is attached at the other end to the door 3a. Further, the upright side 58 a of the cam portion 58 is sandwiched between a pair of guide rollers 62 erected in the middle of the movable edge mount 55. Where cam 57, link 61, guide roller

62 constitutes a cam mechanism.

The movable edge 10 is formed in a U-shaped cross section, and is disposed over almost the entire height at the edge of the side wall of the door 3b in the door closing direction with the U-shaped opening facing the door opening direction. Have been. The first link 11 has one end pivotally connected to the movable edge 10 and the other end connected to the movable edge mount.

55 It is pivotally attached to the landing side wall surface and is located near the upper end of the movable edge 10. The second link 12 has one end pivotally connected to the movable edge 10 and the other end pivotally attached to the landing side wall surface of the movable edge mount 55, and is disposed near the lower end of the movable edge 10. I have. Note that the first link 11 and the second link 12 are arranged in parallel with each other. Then, the movable spring is moved so that the pressing spring 13 urges the second link 12 around the axis 14 b in a predetermined direction. The movable edge mounting base 55 is attached to the mounting base 55 so that the stopper 15 abuts on the second link 12 to regulate the amount of protrusion of the movable edge 10 from the door closing direction end face of the door 3 b. Installed.

As a result, the second link 12 is rotated counterclockwise around the shaft 14b in FIG. 14 by the urging force of the pressing spring 13 and comes into contact with the stopper 15 to stop. In addition, the first link 11 and the second link 12 rotate around the shaft 14 a in conjunction with the rotation of the first link S and the second link 12. Therefore, the movable edge 10 moves in the door closing direction while being displaced downward, and is kept in a state of protruding a predetermined amount from the end face of the door 3b in the door closing direction (steady state). When the force in the door opening direction acts on the movable edge 10, the movable edge 10 moves so as to reduce the amount of protrusion from the end face in the door closing direction against the urging force of the pressing spring 13. At this time, the first link 11 and the second link 12 rotate clockwise around the axes 14a and 14b in FIG. 14, and the movable edge 10 is displaced upward. Operates to move in the door opening direction.

When the doors 3a and 3b open and close, the cam 57 rotates around the pin 60 due to the difference in the opening and closing speeds of the doors 3a and 3b. In conjunction with the rotation of the cam 57 around the pin 60, the engagement position of the upright side 58a with the pair of guide rollers 62 becomes the radius r in the initial stage and the late stage of the door opening / closing operation. In the middle period of the door opening / closing operation, the radius is 1 and the radius is 1. Then, by the engagement between the pair of guide rollers 62 and the upright side 58a, the guide arm 55a is guided by the guide cylinder 56, and the movable edge mount 55 moves in the door opening and closing direction. In other words, in the initial and late stages of the door opening and closing operation, the end surface of the movable edge mounting base 55 in the door closing direction is separated from the end surface of the door 3b in the door closing direction, and in the intermediate period of the door opening and closing operation, the movable edge mounting base 55 is closed. The door closing direction end face is close to the door closing direction end face of door 3b. As a result, the amount of protrusion of the movable edge 10 in the steady state from the end face in the door closing direction decreases in the early and late stages of the door opening / closing operation, and increases in the middle period of the door opening / closing operation. The other configuration is the same as that of the first embodiment.

In the seventh embodiment, as in the first embodiment, an object such as a passenger or luggage hits the movable edge 10, and when the movable edge 10 operates, the optical axis hole 21 is displaced upward. When the optical axis hole 21 deviates from the optical path 22, the optical path 22 is blocked by the movable edge 10, and the light receiver 17 cannot receive the light emitted from the light emitter 16, and the abnormality detection signal is output. Output. Also, even if the movable edge 10 is in the steady state, if an object such as luggage or a passenger blocks the optical path 22 between the optical axis holes 20 and 21, the light receiver 17 emits from the light emitter 16 The received light cannot be received, and an error detection signal is output.

Therefore, also in the seventh embodiment, the same effects as in the first embodiment can be obtained.

In addition, the amount of protrusion of the movable edge 10 from the door closing direction end of the door 3b in the steady state is small in the early and late stages of the door opening / closing operation, and is large in the middle period of the door opening / closing operation. Therefore, in the middle period of the door closing operation in which the door opening / closing speed of the door 3b increases, even if the object hits the door 3b, the door 3b opens before the object hits the end face of the door 3b in the door closing direction. Operate. Thereby, when the object hits the door 3b of the door closing operation, the impact received by the object can be reduced by zj.

In each of the above embodiments, the description has been made assuming that the present invention is applied to the movable edge of the car-side door. However, similar effects can be obtained by applying the present invention to the movable edge of the landing-side door. .

As described above, according to the present invention, since the photoelectric detector that detects an abnormality due to the interruption of the optical path is provided at the doorway member, the output of the photoelectric detector is transmitted to the control device of the door drive device. Cables are routed around movable bodies such as doors. Therefore, the cable does not bend due to the opening / closing operation of the door, the occurrence of disconnection is suppressed, and an abnormality can be detected stably over a long period of time. Further, since the optical path of the photoelectric detector is configured to be interrupted by the operation of the movable edge, the operation of the movable edge can be reliably detected, and the abnormality detection accuracy can be improved. Furthermore, even if the movable edge is in the steady state, an abnormality can be detected when an object such as a passenger or luggage blocks the optical path of the photoelectric detector, so that the object hits the door during the door closing operation This can be prevented beforehand. Industrial applicability As described above, since the elevator door safety device according to the present invention is configured to detect the operation of the movable edge by the photoelectric sensor attached to the non-movable member, the output of the photoelectric sensor is controlled. The cable to be transmitted to the device can be wired using a non-movable member, and it can also detect when an object blocks the optical path of the photoelectric sensor regardless of the operation of the movable edge. Therefore, it is useful as an elevator door safety device with an inexpensive structure that suppresses the occurrence of disconnection of the cable due to bending due to the opening and closing operation of the door and that can detect objects in a non-contact manner and has improved object detection accuracy. is there.

Claims

The scope of the claims

1. Doors that open and close the elevator doors,

A door drive device for opening and closing the door,

It is disposed on the side edge of the side wall of the door in the door closing direction over substantially the entire length in a direction orthogonal to the door opening and closing direction, and in a steady state, is held at a position extending a predetermined amount from the end face of the door in the door closing direction. When a pressing force is applied in the door opening direction, the door moves in the door opening direction while being displaced in a direction perpendicular to the door opening / closing direction to reduce the amount of extension of the door from the end face in the door closing direction. A movable edge that operates like

When the movable edge is in a steady state, the door crosses the doorway in the door opening / closing direction, and when the movable edge is operating, the door opening / closing direction is configured so as to form an optical path so as to be blocked. A photoelectric sensor consisting of a sender and a receiver attached to the doorway member,

A control device for receiving the detection output of the photoelectric detector when the optical path is interrupted and controlling the door driving device to open the door. apparatus.

2. The first optical axis hole is formed in the movable edge so as to coincide with the optical path when it is located in a steady state, and to deviate from the optical path when operating from the steady state. The door safety device for an elevator according to claim 1, characterized in that:

3.2 n (伹, n: integer) first optical axis holes are bored in the movable edge in a row in a direction perpendicular to the door opening / closing direction, and the first reflecting mirror is provided. Are provided on the movable edge in close proximity to each of the eleven pairs of optical axis holes that are in contact with each other in a direction orthogonal to the door opening / closing direction. Are changed by 180 degrees by the pair of the reflecting mirrors arranged close to each of the optical axis holes of each pair, and are emitted from the other of the optical axis holes of each pair.

Two (n—1) second optical axis holes are arranged in a row in a direction orthogonal to the door opening / closing direction. A second reflector is formed on the entrance member, and the second reflector is disposed on the entrance member in close proximity to each of the (n-1) pairs of the second optical axis holes adjacent in a direction orthogonal to the door opening / closing direction. The light emitted from one of the first optical axis holes of each pair is incident on one of the second optical axis holes of each pair, and is proximate to each of the second optical axis holes of each pair. The 180 degrees are changed by the pair of the second reflecting mirrors arranged, and the light is emitted from the other force of the second optical axis hole of each pair, and is incident on the other of the first optical axis hole of each pair. The door safety device for an elevator according to claim 2, characterized in that the door safety device is configured to:

4. The optical path is configured to avoid the movable edge, and the light blocking plate avoids the optical path when the movable edge is in a steady state, and blocks the optical path when the movable edge is operating. The elevator door safety device according to claim 1, wherein the elevator door safety device is attached to the movable edge.

5. A movable edge mounting base movably mounted on the side wall of the door in the opening and closing direction of the door,

In the initial and late stages of the opening and closing operations of the door, the door is separated from the end surface in the door closing direction, and in the middle period of the opening and closing operations of the door, the door is brought close to the end surface in the door closing direction. And a cam mechanism for moving the movable edge mounting base in conjunction with the opening and closing operation of the door.

In the steady state, the movable edge is held at a position extending a predetermined amount from the end surface of the movable edge mounting base in the door closing direction, and when the pressing force in the door opening direction is applied, the movable edge is orthogonal to the door opening / closing direction. The movable edge mount is attached to the movable edge mount so as to move in the door opening direction while being displaced in the direction to reduce the amount of extension of the movable edge mount from the end face in the door closing direction. The door safety device for an elevator according to any one of claims 1 to 4.