JP5201826B2 - Elevator door safety device and door safe driving method - Google Patents

Description

  The present invention relates to an elevator door safety device and a door safe driving method for preventing various objects from being caught between elevator doors.

Conventionally, as an elevator door safety device, an obstacle such as an elevator user, an animal, a luggage or the like (hereinafter referred to as an obstacle) is detected on the upper part of the landing door in order to prevent the object from being caught by the landing door. An optical obstacle detection device is installed.

  This obstacle detection device is provided with a projector and a light receiver facing directly below, and projects light from the projector toward the landing floor. Since the light from the projector hits the floor surface almost perpendicularly, the reflected light after being reflected by the floor surface returns along a path substantially the same as that at the time of projection, and is received by the light receiver that is in a positional relationship close to the projector. .

  By the way, in this kind of obstacle detection device, the floor surface is merely a background, and the purpose is to detect an obstacle that originally exists between the floor surface and the upper frame of the landing door device.

  However, in the installation state of the obstacle detection device as described above, since the projector and the light receiver are installed together in a close positional relationship, most of the amount of light reflected on the floor surface is high when the floor surface reflectance is high. Is received by the light receiver, and there is a problem of erroneous detection as if there is an obstacle between the floor surface and the upper frame of the landing door device.

  In the obstacle detection device, the light emitted from the projector is close to a light beam, so that it is easy to detect in the case of a large obstacle, but difficult to detect in the case of a small obstacle.

Therefore, in order to solve the above problems, a projector and a light receiver are provided in close proximity as described above, and a distance calculation circuit and a distance determination circuit are provided to project light in the state of a light beam from the projector. The reflected light is received by the light receiver. The distance calculation circuit calculates the distance from the light reception signal level by the light receiver to the obstacle. Furthermore, the distance determination circuit determines that there is an obstacle if the obstacle is within a predetermined distance range based on the calculation result by the distance calculation circuit (Patent Document 1).
Japanese Patent Laid-Open No. 10-265157 (see FIG. 1)

  However, the elevator door safety device as described above irradiates the projector in the direction of the light beam in the state of light flux. However, as described above, if the reflectance of the floor surface and other members which are elevator structures is high, the reflection Strong light enters the receiver and normal detection cannot be performed.

  Therefore, although this obstacle detection device is provided with a distance calculation circuit and a distance determination circuit, there is a problem that the configuration of the entire device becomes complicated.

  The present invention has been made in view of the above circumstances, and an elevator door safety device and a door for detecting an obstacle present in a predetermined area near the elevator door without being affected by the reflectance of the floor surface and other elevator structures. The purpose is to provide a safe driving method.

(1) In order to solve the above-mentioned problem, an elevator door safety device according to the present invention is installed on an upper part of an upper frame constituting a door frame of the elevator door, and constitutes at least the door frame of the elevator with a predetermined inclination angle. When there is no obstacle in a predetermined area in the vicinity of the elevator door, and a light projector that irradiates light below the entrance pillar or elevator door to be operated, the light emitted from the projector projects the entrance pillar or the elevator constituting the door frame And a light receiver that guides reflection from the door to the outside of the predetermined light receiving area and receives reflected light from the obstacle in the predetermined light receiving area when an obstacle exists in the predetermined area near the elevator door. It is a configuration.

An elevator door safety device according to the present invention is attached to an upper part of an upper frame constituting a door frame of an elevator door, and is an attachment member that can be adjusted in a predetermined angular range in a predetermined one direction or two orthogonal directions. And an obstacle detection device rotatably attached to the attachment member,
The obstacle detection device includes at least a door frame of the elevator at a predetermined inclination angle in a predetermined direction in accordance with rotation adjustment of one or both of the attachment member and the obstacle detection device with respect to the attachment member. When there is no obstacle in a predetermined area in the vicinity of the elevator door and the projector column or the elevator door that constitutes the light, the light emitted from the projector is the entrance pillar that constitutes the door frame or the A light receiving device that guides reflection from the elevator door to the outside of the predetermined light receiving area and receives reflected light from the obstacle in the predetermined light receiving area when an obstacle exists in the predetermined area near the elevator door. This is a configuration provided.

(2) In order to solve the above-described problem, an elevator door safe driving method according to the present invention is based on a stop signal to a destination floor of an elevator car, and the control unit instructs the door drive unit to open a door at a predetermined speed. A door opening step for sending a signal and opening the elevator door at a predetermined speed, and when the door is opened, the light is emitted from the projector according to any one of claims 1 to 3 and claim 5 . When the reflected light returning when the light hits an obstacle is detected by the light receiver according to any one of claims 1 to 3 and claim 5 , the control unit is sent from the light receiver. A step of receiving an obstacle detection signal, and a door opening speed command signal or an alarm signal for lowering the predetermined speed when the control unit receives the obstacle detection signal to the door drive unit. Send , Opening the elevator door with the door opening speed lowered, or outputting a warning signal to call attention.

ADVANTAGE OF THE INVENTION According to this invention, the door safety device and door safe driving method of an elevator which can detect the obstruction which exists in the predetermined area | region near an elevator door reliably without being influenced by the reflectance of an elevator structure can be provided.

Embodiments of the present invention will be described below with reference to the drawings.
(Embodiment of invention concerning door safety device)
FIG. 1 is a configuration diagram around an elevator car door for explaining an embodiment of an elevator door safety device according to the present invention.

  The elevator car 1 has two side plates 2a and 2b that face each other, a door frame that includes left and right inlet columns 3a and 3b and an upper frame 3c that constitute an opening for entering and exiting into the car 1, and the door frame. A matching back plate 4 (see FIG. 2B described later), a car floor plate 5 and a ceiling plate 6 form a box shape. 7 is a car operation panel arranged on the right side of the entrance post 3b, and 8 is a curtain.

  Car doors 10 and 10 are provided in the door frame so as to be openable and closable. Further, as shown by cutting out a part of the curtain plate 7, an obstacle detection device 11 is installed on the upper frame 3c, and a transparent plate 12 is provided in front of the obstacle detection device 11 so as not to block light. Is placed.

  The obstacle detection device 11 includes a light projector 11a and a light receiver 11b, both of which are disposed downward.

  The light projector 11a is arranged downward, but does not project light directly below but irradiates in a direction inclined by a predetermined angle. As a result, the light 13 emitted from the projector 11a passes through the vicinity of the entrance pillar 3b, is obliquely incident on the floor surface of the car floor board 5, hits the floor surface, and is reflected. The reflected light from the floor surface is reflected at a reflection angle equal to the incident angle. As a result, the light receiver 11b does not receive the reflected light when there is no obstacle near the entrance column 3b, but receives the reflected light from the obstacle when there is an obstacle near the entrance column 3b. That is, when there is an obstacle near the entrance post 3b, the light receiver 11b is installed in a positional relationship in which reflected light from the obstacle can be received.

  In addition, as the light receiver 11b, for example, a single light receiver having a wide-field light receiving range may be used, or a plurality of light receivers may be provided.

FIG. 2 is a perspective view of an attachment member 15 as a specific example for attaching the obstacle detection device 11.
As shown in FIG. 2A, the attachment member 15 includes a stationary plate 16 having an L-shaped cross section and an apparatus support plate 17 having an L-shaped cross section.

  The stationary plate 16 includes a stationary surface plate 16a and a mounting surface plate 16b extending upward from one end surface of the stationary surface plate 16a. The stationary face plate 16a is fixed to the upper frame 3c or an appropriate plate (not shown) by sticking or screwing or the like, and at least two screw rod bodies 16ba with a predetermined interval in the vertical direction on the outer surface portion of the other mounting face plate 16b. , 16bb are projected.

  On the other hand, the apparatus support plate 17 includes a mounted surface plate 17a attached to the mounting surface plate 16b and a supporting surface plate 17b bent in the opposite direction to the stationary plate 16 from the end surface in the depth direction of the mounted surface plate 17a. . The mounted face plate 17a is provided with a circular hole portion 17aa and an arc-shaped hole portion 17ab with a predetermined interval in the vertical direction. Corresponding screw rod bodies 16ba and 16bb projecting from the mounting face plate 16b are inserted into the circular hole 17aa and the arc-shaped hole 17ab, and screwed with nuts (not shown) from the opposite side of the mounted face plate 17a. The device support plate 17 is attached to the mounting face plate 16b of the stationary plate 16.

  The support face plate 17b of the apparatus support plate 17 has, for example, a circular hole 17ba at the right end in the figure, and is slightly inclined to the left at a predetermined distance from the circular hole 17ba in the left lateral direction. The arc-shaped hole 17bb is opened.

  The obstacle detecting device 11 is supported on the support face plate 17b. That is, the obstacle detection device 11 is formed, for example, in a box shape, and a projector 11a and a light receiver 11b are respectively installed downward on a bottom plate inside the box, and further, front portions corresponding to the projector 11a and the light receiver 11b are provided. For example, an opening (not shown) for passing light is formed.

  Further, two screw rod bodies 11c and 11d protrude from the back plate of the obstacle detection device 11 at a predetermined interval, and are inserted into a circular hole 17ba and an arc-shaped hole 17bb formed in the support surface plate 17b. Then, nuts (not shown) are screwed into the threaded rod bodies 11c and 11d protruding from the back surface of the support surface plate 17b, and the obstacle detection device 11 is supported on the support surface plate 17b.

Next, the operation of the elevator door safety apparatus as described above will be described.
(1) Prior to detecting the presence or absence of an obstacle with the obstacle detection device 11 installed on the upper part of the car, the obstacle detection device 11 is attached to the mounting member 15.

  The screw rods 11c and 11d protruding from the back side of the obstacle detection device 11 are inserted into a circular hole portion 17ba and an arc-shaped hole portion 17bb opened in the device support surface plate 17b of the device support plate 17. Then, nuts are screwed into the screw rod bodies 11c and 11d protruding from the back surface side of the support face plate 17b, and temporarily tightened with a moderate tightening force.

  Further, the device support plate 17 is attached to the stationary plate 16. The two threaded rod bodies 16ba and 16bb protruding from the mounting face plate 16b are inserted so that the circular hole portion 17aa and the arc-shaped hole portion 17ab provided on the mounted face plate 17a of the apparatus support plate 17 are fitted together. At this time, since the two screw rod bodies 16ba and 16bb protrude from the circular hole portion 17aa and the arcuate hole portion 17ab of the face plate 17a to be attached, a nut is screwed onto the two screw rod bodies 16ba and 16bb protruding. Temporarily tighten with a gentle tightening force.

(2) After the obstacle detection device 11 is temporarily attached to the attachment member 15 as described above, the obstacle detection device 11 is adjusted to have a predetermined inclination angle.

The inclination angle of the obstacle detection device 11 is adjusted so as to satisfy two conditions.
The first condition is that light is emitted from the projector 11a, the screw rod body 16ba provided on the stationary plate 16 is used as a support shaft, and the device mounting plate 17 is rotated along the arcuate hole portion 17ab. As a result, the projector 11a swings within a predetermined angle range in the depth direction as shown in FIG. Further, the screw rod body 16ba provided on the back side of the obstacle detection device 11 is used as a support shaft, and the obstacle detection device 11 is rotated along the arcuate hole portion 17bb. In this case, the projector 11a swings within a predetermined angle range in the left-right direction as shown in (b) of FIG.

  At the time of adjusting the inclination angle in the obstacle detection device 11, a manpower or other obstacle 18 is placed at a plurality of points in the height direction around the door bag as shown in FIG. At this time, the light 13 irradiated from the projector 11a is reflected by the obstacle 18, and the tilt angle is set so that the reflected light is received by the light receiver 11b. That is, the first condition is set so that the presence of the obstacle 18 can be reliably detected when the obstacle 18 exists around the door bag.

  The second condition is that when the light receiver 11b is able to receive the reflected light from the obstacle 18, the obstacle 18 is removed from the periphery of the door bag, and light is emitted from the projector 11a without any obstacle 18 present. Irradiate. The light 13 irradiated from the projector 11a hits the floor surface of the car floor plate 4 and is reflected at a reflection angle equal to the incident angle, and the reflected light 14 travels obliquely upward from the floor surface. At this time, the light receiver 11b checks whether or not the reflected light 14 from the floor surface is detected. Here, when the light receiver 11b does not detect the reflected light 14, the second condition is satisfied.

  If the light receiver 11b detects the reflected light 14, the same adjustment is repeated again. When the two conditions are cleared, the nuts are tightened to fix the device support plate 17 to the stationary plate 16. The obstacle detection device 11 is fixed to the device support plate 17.

  Therefore, according to the embodiment as described above, when the light 13 from the light projector 11a is projected at a predetermined angle, the light receiver 11b is reflected by the floor surface of the elevator car 1. Since the light 14 is not received, it is not affected at all by the reflectance of the floor surface, and erroneous detection due to the reflectance of the floor surface can be eliminated.

  When the light 13 from the projector 11a is reflected by the obstacle 18 around the door bag, the reflected light 14 is received by the light receiver 11b and the presence of the obstacle 18 is detected. Ensure that the obstacle 18 is pulled into the door bag by blocking the opening and closing operation of the car 10, slowing the opening speed of the car doors 10, 10 or sounding a buzzer (not shown). Can be prevented.

  In the above embodiment, after the obstacle detection device 11 is temporarily attached to the attachment member 15, the device support plate 17 and the obstacle detection device are attached to the stationary plate 16 that is a constituent member of the attachment member 15. The tilt angle of the light 13 emitted from the projector 11a is adjusted while rotating the projector 11. However, for example, only the projector 11a may be installed to tilt at a predetermined angle without the attachment member 15.

  Further, when adjusting the inclination angle of the obstacle detection device 11 and performing the angle adjustment only in the left-right direction shown in (b) of FIG. 2B, the stationary plate 16 is deleted, as shown in FIG. A stationary face plate 17c bent vertically from the lower end surface of the attached face plate 17a may be provided, and the apparatus support plate 17 may be directly fixed to the car upper frame 3c.

  Further, the projector 11a and the light receiver 11b of the obstacle detection device 11 are rotatably attached to the device support plate 17. For example, the projector 11a and the light receiver 11b are completely separated, and the light receiver 11b is a support face plate. It is good also as a structure which can fix to 17b and can rotate only the light projector 11a.

(Other embodiments)
(1) As the projector 11a, a semiconductor light emitting element such as a general light emitting diode or a semiconductor laser is used. For example, an infrared emitting / receiving element that emits infrared light may be used. When an infrared light emitting element is used, it is possible to reliably detect the presence or absence of the obstacle 18 regardless of day and night without being affected by the brightness in the car.

(2) In the above embodiment, the individual projector 11a and the light receiver 11b are provided side by side. However, for example, the same effect can be obtained by using the object detection device 11 in which the projector 11a and the light receiver 11b are integrated. Play. In the integrated object detection device 11, it is desirable that the light receiver 11b has a wide light receiving region. The reason is that the light receiver 11b is also inclined according to the angle inclination of the projector 11a and the light receiving area is narrowed, so that the obstacle 18 around the door bag can be reliably detected even in a state of being inclined to some extent. .

(3) Since the projector 11a is inclined at an arbitrary angle and projected downward, for example, as shown in FIG. 5A, the light 13 from the projector 11a is irradiated toward the entrance column 3b. Good. When the light 13 irradiated from the projector 11a hits the entrance pillar 3b and is reflected, the reflected light 14 travels toward the floor surface in the car 1, and the reflected light 14 from the floor surface is received by the light receiver 11b. Absent.

  Moreover, you may irradiate the light 13 from the light projector 11a toward the car door 10, as shown in FIG.5 (b), (c). The light 13 emitted from the light projector 11a hits the structure of the car 1 twice as in FIG. 5A and is reflected and travels away from the light receiving area of the light receiver 11b. Therefore, the light receiver 11b reflects the reflected light. 14 is not received.

  In addition, two sets of the projector 11a and the light receiver 11b are prepared, and the light 13 from the projector 11a forming one set is applied to the floor surface in the car 1 as shown in FIG. 1, for example, and another set 11a is formed. For example, as shown in FIG. 5, the light 13 may be irradiated so as to strike the entrance pillar 3 b or the car door 10.

  Thus, when two sets of light projector 11a and light receiver 11b are provided, the presence of the original obstacle 18 can be detected over a wide range without being affected by the reflectance of the floor surface.

(4) Further, the elevator door safety device shown in FIG. 1 irradiates the light 13 from the light projector 11a while tilting in the left-right direction in the car 1, but, for example, protrudes from the stationary plate 16 as shown in FIG. If the screw rod body 16ba is used as a support shaft and the device support plate 15 is rotated at an appropriate angle in the depth direction in the elevator car 1 as shown in FIG. 2B, the car door 10 is shown in FIG. 6B. It is possible to irradiate the car floor 5 inside the car in the vertical direction.

  By adopting such a configuration, the size of the curtain plate 6 at the top of the car that protrudes from the surface position of the car door 10 to the inside of the car can be reduced.

(5) Furthermore, in the above embodiment, the obstacle detection device 11 is installed at a location near the entrance column 3b side of the upper part of the car door 10, but the car doors 10 and 10 are single-open doors as shown in FIG. In this case, the obstacle detection device 11 is installed on the upper frame 3c located between the low speed side door 10a and the high speed side door 10b, and the light 13 from the projector 11a is irradiated at an appropriate inclination angle. Also good.

  By setting it as such a structure, the obstruction 18 which is going to be inserted | pinched between the low speed side door 10a and the high speed side door 10b can be detected reliably. Further, when the low-speed door 10a and the high-speed door 10b are fully opened, if the light reception signal received by the light receiver 11b is not reflected in the door opening control, the elevator user gets on and off at all times.

(6) Furthermore, as shown in FIG. 8, the structure which installs the obstruction detection apparatus 11 in the appropriate height position of the open side end surface of the low-speed car door 10a may be sufficient.

  By installing the obstacle detection device 11 on the low-speed side car door 10a in this way, the light projection position of the obstacle detection device 11 changes following the movement of the low-speed car door 10a when the door is closed. When the door is open, the state in which the obstacle 18 is sandwiched between the low-speed car door 10a and the high-speed car door 10b can be easily detected.

(7) Further, the obstacle detection device 11 is installed not on the curtain plate 8 but on the ceiling plate 6 on the line where the low speed side door 10a and the high speed side door 10b overlap, and the projector is similar to the above-described embodiments. The structure which irradiates the light from 11a to the floor board 5 etc. in a cage | basket with a predetermined inclination angle may be sufficient.

  Thereby, it becomes possible to install the obstacle detection device 11 without being limited.

(Embodiment of invention related to door safe driving method)
FIG. 10 is an elevator configuration diagram illustrating an embodiment of a door safe driving method according to the present invention using the door safety device described above.

  In the figure, 20 is a hoisting machine installed at an appropriate location in the hoistway 21 or a machine room above the hoistway 21, and 22 is a main rope hung over the hoisting machine 20. The elevator car 1 is suspended from one end of the rope 22 and the counterweight 23 is suspended from the other end of the rope 22. Reference numeral 24 denotes a control panel that controls the elevator car 1 to the destination floor 25 via the hoisting machine 20 and the main rope 22 based on the registration of the car call and the hall call. A tail cord 26 is connected between the control panel 24 and the elevator car 1. The tail cord 26 has a function of supplying necessary power from the control panel 24 to the elevator car 1 and transferring necessary information between the control panel 24 and various electronic devices in the elevator car 1.

  That is, the control panel 24 exchanges information regarding the projector 11 a and the light receiver 11 b with the obstacle detection device 11 installed in the elevator car 1 via the tail cord 25. The control panel 24 sends a door opening / closing command signal to the door driving device 27 via the tail cord 25 based on the stop detection signal of the landing 25 by the elevator car 1. The door driving device 27 controls opening / closing of the car doors 10 and 10 based on a door opening / closing command signal from the control panel 24, and the door opening / closing control technology is already well known.

  Hereinafter, an operation method for safely opening and closing the car doors 10 and 10 according to an obstacle presence / absence detection signal received by the control panel 24 from the obstacle detection device 11 will be described.

(1) Regarding speed control when the car doors 10 and 10 are opened.

A. When the elevator car 1 stops on the destination floor, the control panel 24 sends a door opening command signal to the door driving device 27 when it receives a stop detection signal from the corresponding floor of the hoistway 21. Based on the door opening command signal from the control panel 24, the door driving device 27 performs opening control at a predetermined driving speed from the closed state of the car doors 10 and 10 to the fully opened position.

B. When the car doors 10 and 10 are opened, the light 13 from the light projector 11a is irradiated at a predetermined angle. As long as the light is reflected by the car floor plate 5, the light receiver 11b emits light from the car floor plate 5. The reflected light 14 is not received. However, when the light receiver 11b receives the reflected light 14 from the obstacle 18 until the car doors 10 and 10 are fully opened, the obstacle detection signal is sent to the control panel 24 via the tail cord 26. Send it out. When the light reception level exceeds a predetermined threshold value, an obstacle detection signal may be transmitted.

C. Here, when the control panel 24 receives the detection signal that there is an obstacle, the control panel 24 sends a door opening command signal with a predetermined speed signal to the door driving device 27. Based on the speed signal included in the door opening command signal, the door drive device 27 controls the opening of the car doors 10 and 10 with the door opening speed lowered.

  Therefore, according to this embodiment, when the control panel 24 receives the reflected light 14 from the obstacle 18 existing around the door bag from the light receiver 11b, it detects the presence of the obstacle and automatically opens the door. As a result, the obstacle 18 can be reduced from being pulled into the door bag.

(2) Alarm output when the car doors 10 and 10 are opened.

A. When the elevator car 1 stops on the destination floor, the control panel 24 sends a door opening command signal to the door driving device 27 when it receives a stop detection signal from the corresponding floor of the hoistway 21. Based on the door opening command signal from the control panel 24, the door driving device 27 performs opening control at a predetermined driving speed from the closed state of the car doors 10 and 10 to the fully opened position.

B. When the car doors 10 and 10 are opened, the light 13 from the light projector 11a is irradiated at a predetermined angle. As long as the light is reflected by the car floor plate 5, the light receiver 11b emits light from the car floor plate 5. The reflected light 14 is not received. However, when the light receiver 11b receives the reflected light 14 from the obstacle 18 until the car doors 10 and 10 are fully opened, the obstacle detection signal is sent to the control panel 24 via the tail cord 26. Send it out. When the light reception level exceeds a predetermined threshold value, an obstacle detection signal may be transmitted.

C. When the control panel 24 receives a detection signal indicating that there is an obstacle, the control panel 24 reads pre-stored message data such as “Please be careful because it is pulled into the door bag” and the elevator car through the tail code 26 together with the door opening command signal. 1 to send. Since an audio generator (not shown) such as a speaker is usually installed in the elevator car 1, when message data is received from the control panel 24, the audio generator “will be pulled into the door bag. Message data such as "Please". Instead of the message data, only a warning sound may be output.

  Further, the door drive device 27 performs the opening control of the car doors 10 and 10 at a predetermined speed based on the door opening command signal sent from the control panel 24.

  Therefore, according to this embodiment, when the control panel 24 receives the reflected light 14 from the obstacle 18 around the door bag from the light receiver 11b, it detects the presence of the obstacle and automatically sends the message data to the elevator. Since it is transmitted to the car 1 and message data or an alarm sound such as “Please be careful because it is drawn into the door bag” is output from the sound generator, it is possible to reduce the obstacle 18 from being drawn into the door bag.

  In the above-described embodiment, the door safety device for the car doors 10 and 10 has been described. For example, the obstacle detection device 11 is attached to the upper portion of the landing door 28, and the obstacle door approaching the vicinity of the door bag, for example, Needless to say, the present invention can be similarly applied to the presence / absence detection.

  Although the case where the car door has two single doors has been described, the present invention can be similarly applied even when the car door is double-opened or the number of doors is different.

  In addition, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention.

BRIEF DESCRIPTION OF THE DRAWINGS The elevator car door periphery block diagram explaining one Embodiment of the elevator door safety device which concerns on this invention. FIG. 2 is an exploded perspective view of an attachment member that supports an obstacle detection device including the projector and the light receiver shown in FIG. The figure explaining the detection state of the obstacle which exists in the door bag periphery. The perspective view explaining the other example of an attachment member. The figure explaining the optical path of the light irradiated from the light projector. The figure explaining the optical path of the light irradiated from the light projector. The figure explaining the example which installed the obstruction detection apparatus in the upper frame between two cage doors. The figure explaining the example which installed the obstruction detection apparatus in the low speed door side. The figure explaining the example which installed the obstruction detection apparatus in the ceiling board of the cage | basket | car. The block diagram of the elevator explaining the door safe driving method of the elevator which concerns on this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Elevator car, 3a, 3b, 3c ... Door frame, 5 ... Car floor board, 6 ... Ceiling board, 7 ... Car operation panel, 8 ... Curtain board, 10, 10 ... Car door, 11 ... Obstacle detection apparatus, 11a DESCRIPTION OF SYMBOLS ... Projector, 11b ... Light receiver, 13 ... Light irradiated from projector, 14 ... Reflected light, 15 ... Mounting member, 16 ... Stationary plate, 17 ... Apparatus support plate, 18 ... Obstacle, 20 ... Hoisting machine, 24 ... control panel, 26 ... tail cord, 27 ... door drive.

Claims (9)

In an elevator door safety device that detects an obstacle existing in a predetermined area near the elevator door and controls the operation of the elevator door based on the detected signal,
A projector that is installed at an upper part of an upper frame constituting the door frame of the elevator door, irradiates light at least below an entrance column or the elevator door that constitutes the door frame of the elevator with a predetermined inclination angle, and a vicinity of the elevator door When there is no obstacle in the predetermined area, the light emitted from the projector is guided to be reflected from the entrance column or the elevator door constituting the door frame to the outside of the predetermined light receiving area, and enters the predetermined area near the elevator door. An elevator door safety device, comprising: a light receiver that receives reflected light from the obstacle in the predetermined light receiving area when an obstacle is present.   The positional relationship between the projector and the light receiver is such that when no obstacle exists, the light emitted from the projector is reflected by a member constituting an elevator, and the reflected light is received by the light receiver. The elevator door safety device according to claim 1, wherein the positional relationship is outside the light receiving area. In an elevator door safety device for preventing an obstacle present in a predetermined area near the elevator door from being caught in the elevator door,
An attachment member that is attached to the upper part of the upper frame constituting the door frame of the elevator door and can be adjusted to rotate in a predetermined angular range in a predetermined one direction or two orthogonal directions, and is rotatably attached to the mounting member. Obstacle detection device,
The obstacle detection device includes at least a door frame of the elevator at a predetermined inclination angle in a predetermined direction in accordance with rotation adjustment of one or both of the attachment member and the obstacle detection device with respect to the attachment member. When there is no obstacle in a predetermined area in the vicinity of the elevator door and the projector column or the elevator door that constitutes the light, the light emitted from the projector is the entrance pillar that constitutes the door frame or the A light receiving device that guides reflection from the elevator door to the outside of the predetermined light receiving area and receives reflected light from the obstacle in the predetermined light receiving area when an obstacle exists in the predetermined area near the elevator door. An elevator door safety device characterized by being provided.   The elevator door safety device according to any one of claims 1 to 3, wherein the light emitted from the projector is an infrared ray.   The elevator door safety device according to any one of claims 1 to 4, wherein the projector and the light receiver are optical devices integrated with each other.   The elevator door safety device according to any one of claims 1 to 5, wherein the light emitted from the projector is irradiated at a predetermined angle in a direction orthogonal to the elevator door. The said light projector and the said light receiver are installed in any one of the following members, when the said elevator door is a single door type door. Elevator door safety device.
(A) It installs in members, such as a door frame upper part of the position where a low speed side door and a high speed side door overlap.
(B) Among the low-speed side door and the high-speed side door, it is installed at a predetermined height position of the low-speed side door.
(C) Install on the ceiling plate on the line where the low speed side door and the high speed side door overlap. A door driving unit for opening and closing the elevator door and a control unit for sending a door opening / closing command signal including at least a door opening speed, and an obstacle existing in a predetermined area near the elevator door is sandwiched between the elevator doors. In the elevator door safe driving method to prevent,
Based on a stop signal to the destination floor of the elevator car, the control unit sends a door opening command signal at a predetermined speed to the door driving unit, and opens the door at a predetermined speed. sometimes the claims 1 to claim 3, wherein the reflected light which the light emitted from the projector described is returned against the obstacle to any one of claims 5 to claim 1 to claim 3, claim 5 When the light receiver described in any one of the above is detected, the control unit receives a detection signal with an obstacle sent from the light receiver, and the control unit has a detection signal with an obstacle. A door opening speed command signal for lowering the speed than the predetermined speed is transmitted to the door drive unit, and a low speed door opening step for opening the elevator door with the door opening speed lowered is provided. The Door safety operation method of the elevator and butterflies. A door driving unit for opening and closing the elevator door and a control unit for sending a door opening / closing command signal including at least a door opening speed, and an obstacle existing in a predetermined area near the elevator door is sandwiched between the elevator doors. In the elevator door safe driving method to prevent,
When receiving a stop signal to the destination floor of the elevator car, the control unit sends a door opening command signal at a predetermined speed to the door driving unit, and a door opening step for opening the elevator door at a predetermined speed; claim from claim 1 when the door opens 3, wherein the reflected light which the light emitted from the projector to any one of claims 5 to be reflected when the obstacle from the claim 1 to claim 3, wherein When the light receiver according to any one of Items 5 is detected, the control unit receives an obstacle detection signal sent from the light receiver, and the control unit has an obstacle. An elevator door safe driving method, comprising: a warning output step of transmitting a predetermined warning signal when receiving a detection signal, and outputting from a sound generating means in the vicinity of the elevator door.

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