KR101210182B1 - Slide door device and elevator - Google Patents

Abstract

In the slide door apparatus, the first detection apparatus includes a light emitter disposed on the side of the doorway, and an imaging means for imaging the light emitter opposite the light emitter with the doorway therebetween to detect an object present at the doorway. The second detection device includes a light emitter that emits a light beam along the side of the doorway, and a light receiver that receives the light beam from the light projector, and detects an object present near the side of the doorway. The control device controls the opening and closing of the door based on the information from the first and second detection devices.

Description

SLIDE DOOR DEVICE AND ELEVATOR}

The present invention relates to a slide door device for automatically moving the door horizontally, and an elevator using the same.

In the conventional slide door apparatus, a pair of light emitters having a long continuous light emitting surface and a pair of cameras for photographing the light emitting surfaces of the opposing light emitters are provided on the left and right vertical frames of the doorway, whereby It is covered as a monitoring area (for example, refer patent document 1).

[Patent Document 1] Japanese Unexamined Patent Application Publication No. 2004-338846

In the conventional slide door apparatus as described above, an object can be detected at the full width of the entrance and exit, but it cannot be determined how far the object is from the vertical frame. For this reason, if the user attempts to pass through an open doorway during a door opening action, the door opening operation is stopped once by detecting the user even though there is no fear of the user being drawn between the column and the door. This unnecessarily hinders the traffic of the user.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to obtain a slide door device and an elevator using the same, which can improve convenience by detecting an object present at an entrance and a location of the detected object. do.

The slide door device according to the present invention comprises a door for opening and closing the door by moving horizontally; A first detection device having a light emitter disposed at a side of the doorway and an image pickup means for imaging the light emitter opposite the light emitter with the doorway interposed therebetween, the first detecting device detecting an object present at the doorway; A second detector for detecting an object in the vicinity of the side of the door, including a light emitter that emits a light beam along the side of the doorway, and a light receiver that receives the light beam from the light projector; and first and second detections; And a control device for controlling the opening and closing of the door based on the information from the device.

Moreover, the elevator which concerns on this invention is an elevator car which elevates in a hoistway; Elevator door for opening and closing the doorway installed between the car and the platform by moving horizontally; A first detection device having a light emitter disposed at a side of the doorway and an image pickup means for imaging the light emitter opposite the light emitter with the doorway interposed therebetween, the first detecting device detecting an object present at the doorway; A second detection device having a light emitter for emitting a light beam along the side of the doorway and a light receiver receiving the light beam from the light emitter, for detecting an object present near the side of the doorway; And a control device for controlling the opening and closing of the elevator door based on the information from the first and second detection devices.

According to the slide door and the elevator using the same according to the present invention, it is possible to detect an object existing at the entrance and exit and to determine the position of the detected object to improve convenience.

BRIEF DESCRIPTION OF THE DRAWINGS It is the front view which looked at the cage door apparatus of the elevator by Embodiment 1 of this invention from the cage inside.
FIG. 2 is a schematic block diagram showing a control circuit of the car door apparatus of FIG. 1.
FIG. 3 is an explanatory diagram showing a difference image obtained by the image processing determining unit of FIG. 2 when no object exists in the monitoring area.
FIG. 4 is an explanatory diagram showing a first example of the difference image obtained by the image processing determination unit in FIG. 2 when an object exists in the surveillance area.
FIG. 5 is an explanatory diagram showing a second example of the difference image obtained by the image processing determination unit in FIG. 2 when an object exists in the surveillance area. FIG.
6 is a flowchart illustrating an operation when the door of the main control unit of FIG. 2 is opened.
Fig. 7 is a flowchart showing the operation when the door of the main control unit is opened according to the second embodiment of the present invention.
It is sectional drawing of the cage door apparatus by Embodiment 3 of this invention.
9 is a perspective view illustrating the first housing of FIG. 8.
FIG. 10 is a perspective view illustrating the second housing of FIG. 8. FIG.
It is a perspective view which shows the 1st housing which concerns on Embodiment 4 of this invention.
12 is a perspective view illustrating a second housing according to the fourth embodiment.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment of this invention is described with reference to drawings.

Embodiment 1

BRIEF DESCRIPTION OF THE DRAWINGS It is the front view which looked at the cage door apparatus (slide door apparatus) which concerns on Embodiment 1 of this invention from the cage | basket | car interior. In the figure, the car 1 and the door 1a which raise and lower the inside of a hoistway are provided. The car door 1a is opened and closed by the first and second car doors 2a and 2b as horizontally moving elevator doors. The car doorway frame 3 is provided around the car doorway 1a.

The car doorway frame 3 has an upper portion provided between the first and second vertical frames 3a and 3b provided on the left and right sides of the car doorway 1a and the upper ends of the first and second vertical frames 3a and 3b. It has the horizontal frame 3c and the lower horizontal frame 3d provided in the bottom part of the cage | basket | car entrance 1a.

The car operating panel 4 is provided in the front surface of the 2nd vertical frame 3b. The car operating panel 4 is provided with a display device 5, an alarm device 6, a plurality of floor designation buttons 7, a door open button 8, and a door close button 9. The front surface of the upper horizontal frame 3c is provided with the indicator 10 which displays the position of the moving car 1 in motion.

The first light emitter 11 is provided on the side surface of the first vertical frame 3a that faces the second vertical frame 3b. The first light emitter 11 has a long and continuous first light emitting surface 11a in the vertical direction. The second light emitter 12 is provided on the side surface of the second vertical frame 3b that faces the first vertical frame 3a. The second light emitter 12 has a long and continuous second light emitting surface 12a in the vertical direction. The first and second light emitting surfaces 11a and 12a are provided to reach almost the entire height of the car doorway 1a, and face each other with the car doorway 1a interposed therebetween.

In the upper end part of the side surface of the 1st vertical frame 3a which opposes the 2nd vertical frame 3b, the 1st camera 13 as 1st imaging means which image | photographs the 2nd light emitting surface 12a is provided. The 1st camera 13 is arrange | positioned adjacent the upper end part of the 1st light emitting surface 11a. In the lower end part of the side surface of the 2nd vertical frame 3b which opposes the 1st vertical frame 3a, the 2nd camera 14 as 2nd imaging means which image | photographs the 1st light emitting surface 11a is provided. The second camera 14 is provided adjacent to the lower end of the second light emitting surface 12a.

At the lower end of the side surface of the first vertical frame 3a that faces the second vertical frame 3b, a first light projector 15 that emits light beams obliquely upward along the first vertical frame 3a is provided. . The first light projector 15 is provided adjacent to the lower end of the first light emitting surface 11a. At one end of the lower surface of the upper horizontal frame 3c (the end on the side of the first vertical frame 3a), a first light receiver 16 that receives the light beam emitted from the first light projector 15 is provided.

At the lower end of the side surface of the second vertical frame 3b that faces the first vertical frame 3a, a second light projector 17 that emits light beams obliquely upward along the second vertical frame 3b is provided. . The second light projector 17 is provided above the second camera 14 adjacent to the lower end of the second light emitting surface 12a. At the other end of the lower surface of the upper horizontal frame 3c (the end on the side of the second vertical frame 3b), a second light receiver 18 that receives the light beam emitted from the second light projector 17 is provided.

In addition, it is preferable to arrange the first and second light emitters 15 and 17 at a position of about 10 to 30 cm from the lower ends of the vertical frames 3a and 3b. Moreover, it is preferable to provide the 1st and 2nd light receivers 16 and 18 in the position of about 5-20 cm from the vertical frames 3a and 3b of the lower surface of the upper horizontal frame 3c. By arranging in this way, the linear detection area along the nearly vertical frames 3a and 3b can be secured.

The first and second light emitters 11 and 12, the first and second cameras 13 and 14, and the first and second light emitters 15 and 17 protrude from the surfaces of the vertical frames 3a and 3b. It is desirable to be provided so as not to. In particular, it is more preferable to provide the surface of the vertical frames 3a and 3b without irregularities. As a result, it is possible to prevent contact with passengers and carts passing through the car entrance and exit 1a, and to prevent deposition of dust and the like, thereby preventing a decrease in detection accuracy.

FIG. 2 is a schematic block diagram showing a control circuit of the car door apparatus of FIG. 1. In the figure, the opening and closing operations of the car doors 2a and 2b are controlled by the opening and closing control unit 19. The open / close control unit 19 is mounted on the car 1, for example, and controls a door motor (not shown) that drives the car doors 2a and 2b.

The signals from the first and second cameras 13 and 14 are sent to the image processing determination unit 20. The image processing determination unit 20 performs the first and second light emitters based on signals from the first and second cameras 13 and 14 at the time of opening and closing the first and second car doors 2a and 2b. It is determined whether the light from 11, 12 is blocked by an object (obstacle).

First and second light emitters 11 and 12, first and second cameras 13 and 14, image processing determination unit 20, first and second light emitters 15 and 17, alarm device 6 and The opening / closing control unit 19 is controlled by the main control unit 21. Signals from the image processing determination unit 20, the first and second light receivers 16 and 18, and the opening and closing control unit 19 are input to the main control unit 21.

The main control part 21 irradiates light from the 1st and 2nd light emitters 11 and 12 at the time of opening and closing of the cage doors 2a and 2b, and monitors the presence or absence of the object vicinity of the cage | basket | car entrance 1a. In addition, the main controller 21 emits light beams from the first and second light projectors 15 and 17 at least when the car doors 2a and 2b are opened, and thus the first and second vertical frames 3a and 3b. Monitor the presence of nearby objects. In addition, the main control part 21 sends the opening / closing command of the cage | basket | car doors 2a and 2b to the opening-and-closing control part 19 according to the detection result of an object.

The opening / closing control unit 19, the image processing determination unit 20, and the main control unit 21 are each constituted by a microcomputer. However, at least two of the opening / closing control unit 19, the image processing determining unit 20, and the main control unit 21 can be configured by a common microcomputer. In addition, in Embodiment 1, the control apparatus has the opening-closing control part 19 and the main control part 21. As shown in FIG.

Moreover, the 1st detection apparatus 22 which detects the object which exists between the vertical frames 3a and 3b, ie, the car doorway 1a, has the 1st and 2nd light emitters 11 and 12 and the 1st and 1st It has two cameras 13 and 14 and an image processing determination unit 20. In addition, the second detection device 23 for detecting an object in the vicinity of the vertical frames 3a and 3b includes the first and second light emitters 15 and 17 and the first and second light receivers 16 and 18. )

Here, in the first detection device 22 and the second detection device 23, the wavelength of the light used by the first detection device 22 and the second detection device 23 are used so that the light of each other does not interfere with each other. It is preferable that the wavelength of the light used differs. For example, in the first detection device 22, the light emitters 11 and 12 glow red, and the cameras 13 and 14 photograph only the red color. In the second detection device 23, the light emitters 15 and 17 are used. Preferably emits near-infrared light, and the receivers 16 and 18 receive only near-infrared light.

Next, the object detection method by the 1st detection apparatus 22 is demonstrated. First, the image data? From the cameras 13 and 14 when the light emitters 11 and 12 are not turned on, and the image data? When the light emitters 11 and 12 are turned on are image processing plates. Import into the government (20). The difference image γ is calculated by subtracting the image data α from the image data β. When performing object monitoring, the above operation is repeated.

When such a difference process is executed, only the images of the light emitting surfaces 11a and 12a from which ambient light is removed are left in the difference image γ. Therefore, when there is no object blocking the light in the two triangular monitoring areas with the cameras 13 and 14 as the vertex and the light emitting surfaces 11a and 12a as the base, the difference image γ is shown in FIG. One continuous straight light emitting image as shown remains.

On the other hand, when an object which blocks light exists in the monitoring area, part of the light is blocked, so that the light emitting surface image as shown in Fig. 4 or 5 remains in the difference image γ. That is, in the difference image γ of FIG. 4, the light emitting surface image is divided into a plurality of parts and is discontinuous. In the difference image γ in FIG. 5, the length of the light emitting surface image is shorter than that in normal time (FIG. 3). The image processing determination unit 20 determines that an object exists between the vertical frames 3a and 3b when detecting that the light emitting surface image is discontinuous, shortened, or that the light emitting surface image is missing. The signal is sent to the main control unit 21.

Next, the object detection method by the 2nd detection apparatus 23 is demonstrated. When an object exists between the first light emitter 15 and the first light receiver 16, the amount of light received from the first light emitter 15 received by the first light receiver 16 is lowered. Similarly, when an object exists between the second light emitter 17 and the second light receiver 18, the amount of light received from the second light emitter 17 received by the second light receiver 18 is lowered. And when the light reception amount of the 1st light receiver 16 or the 2nd light receiver 18 falls below a preset threshold, the main-control part 21 determines that an object exists in the vicinity of the vertical frames 3a and 3b.

Next, FIG. 6 is a flowchart showing an operation of opening the door of the main control unit 21 of FIG. 2. After the car 1 stops on the landing floor, the main control part 21 is provided with a first time before the car doors 2a and 2b actually start the door opening operation (for example, a few seconds before). And the detection operation of the object by the second detection devices 22, 23 is started to determine the presence or absence of the object (step S1). At this time, if an object is not detected, normal door opening is started at a normal timing (step S2).

On the contrary, when an object is detected, at least one of the display device 5 and the alarm device 6 generates a warning so that the passenger in the car 1 is separated from the car doors 2a and 2b ( Step S3). Specifically, the voice (or warning sound) memorized in advance, for example, "Door opens. "Please stay away from the door" and the like to broadcast the information from the alarm device 6, or display the text information stored in advance on the display device 5. When the object is no longer detected, the door is normally opened.

Normally, when the door is opened, the object detection operation by the first detection device 22 is stopped, and only the object detection operation by the second detection device 23 is continued (step S4). If the object is not detected by the second detection device 23, the door opening operation is continued (step S5). Then, the object detection operation by the second detection device 23 is continued until the first and second car doors 2a and 2b move to the fully open position (steps S4 to S6). And if the 1st and 2nd car doors 2a and 2b move to the fully open position in the state in which the object was not detected by the 2nd detection apparatus 23, a process will be complete | finished.

On the other hand, if an object is detected by the second detection device 23 during the door opening operation, the door opening operation is once stopped (step S7), and the above warning operation is performed (step S8). Then, the warning operation is continued in the state in which the door opening operation is stopped until the object is not detected by the second detection device 23.

In the car door device of such an elevator, the first detection device 22 for detecting an object present in the car door 1a and the vicinity of the vertical frames 3a and 3b, that is, the vertical frames 3a and 3b or the door The presence or absence of an object is monitored by both the 2nd detection apparatus 23 which detects the object located in the vicinity of the clearance gap between (2a, 2b). For this reason, before the door opening start, the object located in the vicinity of the car doors 2a and 2b can be detected in the whole car doorway 1a, and after the door opening start, the position which obstructs the door opening operation | movement is started. That is, the object located in the vicinity of the vertical frames 3a and 3b can be detected. Therefore, even if the user tries to pass through the car doorway 1a that is open during the door opening operation, the door opening operation can be prevented from being stopped once, thereby preventing the user's passage from being unnecessarily impeded. In other words, it is possible to detect an object present in the car doors 2a and 2b and to determine the position of the detected object, thereby improving convenience.

In addition, the main control unit 21 monitors whether an object is detected by at least one of the first and second detection devices 22 and 23 from a predetermined time before the door opening start until the door opening start, and starts the door opening. Since the object is detected only by the second detection device 23 during the period from the door to the complete opening of the door, the presence or absence of the object can be efficiently monitored according to the stage of the door opening operation.

In addition, when the object is detected by at least one of the first and second detection devices 22 and 23 from a predetermined time before the door opening starts until the main control part 21 starts the door opening, the alarm device 6 A warning is generated by the alarm device 6 when an object is detected by only the second detection device 23 during the door opening start to the complete door opening. By appropriately generating a warning, the door opening operation can be performed smoothly.

Embodiment 2 Fig.

Next, FIG. 7 is a flowchart which shows the operation | movement at the time of the door opening of the main control part 21 by Embodiment 2 of this invention, and the structure of a cage | basket | car door apparatus is similar to Embodiment 1. FIG.

In this example, an object is detected by at least one of the first and second detection devices 22 and 23 from the predetermined time before the door opening start until the door opening start, and the alarm device 6 generates a warning. Then, it is checked again whether an object is detected by at least one of the first and second detection devices 22, 23 (step S9). And if an object is not detected, normal door opening will start (step S2).

On the other hand, if an object is detected again despite the occurrence of a warning, for example, a warning such as "door opens" is generated by the alarm device 6 (step S10), and the door is opened at a lower speed than usual. The operation starts (step S11). When the low speed door opening is started, the detection operation of the object by the first and second detection devices 22, 23 is stopped, and the low speed door opening operation is continued until the door is fully opened.

In such a cage door apparatus of an elevator, when an object is detected by at least one of the first and second detection devices 22 and 23 from a predetermined time before the door opening start until the door opening start, the door is opened at a lower speed than usual. Since the operation is executed, the state of not starting the door opening can be prevented from continuing forever and the convenience can be improved.

In the second embodiment, when the object is detected again after the first warning, the low speed door is opened, but when the object is continuously detected after the warning of the preset number of times, the low speed door is opened and the door is opened until the preset number of times. It may be prevented from starting.

Moreover, in Embodiment 2, when an object was detected by the 2nd detection apparatus 23 after the door opening start, the door opening operation was stopped, but also in this case, the door opening operation is resumed at low speed after one or several warnings. You may.

Embodiment 3.

8 is sectional drawing of the cage door apparatus of the elevator by Embodiment 3 of this invention. In the figure, the first housing 24 is fixed to the car doorway 1a in the first vertical frame 3a. The second housing 25 is fixed to the car doorway 1a on the second vertical frame 3b. The first and second housings 24 and 25 are provided to reach almost the entire height of the car doorway 1a and face each other with the car doorway 1a therebetween. Moreover, the 1st and 2nd housings 24 and 25 are being fixed to the edge part by the side of the car door 2a, 2b of the vertical frames 3a, 3b.

9 is a perspective view of the first housing 24 of FIG. 8, and FIG. 10 is a perspective view of the second housing 25 of FIG. 8. A first light emitter 11, a first camera 13, and a first light emitter 15 are mounted in the first housing 24. The second light emitter 12, the second camera 14, and the second light emitter 17 are mounted in the second housing 25. The other configuration is similar to that of the first embodiment.

In the cage door apparatus of such an elevator, the first light emitter 11, the first camera 13, and the first light emitter 15 are mounted in the first housing 24 in advance, and the second light emitter 12 and the second camera are installed. By mounting the 14 and the second light projector 17 in the second housing 25 in advance, the installation work at the installation site can be greatly reduced, and workability can be improved.

Moreover, the installation position of the 1st light receiver 15 and the installation position of the 1st light receiver 16 may be changed, and in that case, the 1st light receiver 16 may be mounted in the 1st housing 24. Similarly, the installation position of the second light emitter 17 and the installation position of the second light receiver 18 may be changed, and the second light receiver 18 may be mounted in the second housing 25.

Embodiment 4.

Next, FIG. 11 is a perspective view showing the first housing 26 according to the fourth embodiment of the present invention, and FIG. 12 is a perspective view showing the second housing 27 according to the fourth embodiment. In Embodiment 3, the 1st camera 13 and the 1st light emitter 15 are arrange | positioned beside the 1st light emitter 11, and the 2nd camera 14 and the 2nd light emitter ( 17) are arranged. In contrast, in the fourth embodiment, the first light emitter 11, the first camera 13, and the first light emitter 15 are aligned in one row in the vertical direction, and the second light emitter 12, the second camera 14, and the like. The second light projector 17 is arranged in one row in the vertical direction. That is, the first camera 13 is disposed above the first light emitter 11, the first light emitter 15 is disposed below the first light emitter 11, and the second light emitter 12 is disposed below the second light emitter 12. The camera 14 is arranged, and the second light projector 17 is disposed below the second camera 14.

By arranging in this way, the width dimension of the 1st and 2nd housings 26 and 27 can be made small, and the mounting space of the 1st and 2nd housings 26 and 27 to the vertical frames 3a and 3b is made. Can be shrunk.

In the above example, although the light emitters 11 and 12 glow red and the light emitters 15 and 17 emit near infrared light, the wavelengths of the light emitted by the light emitters 11 and 12 and the light emitters 15 and 17 emit light. Is not limited to these. For example, the light emitted by the light emitters 11 and 12 may be green, blue or orange. The light emitters 11 and 12 may emit near infrared light, and the light emitters 15 and 17 may emit visible light. In addition, the light emitters 11 and 12 and the light emitters 15 and 17 may emit near infrared light having different wavelengths.

In the above example, the signals from the first and second cameras 13 and 14 are processed by the common image processing determination unit 20, but they can also be processed by two independent image processing determination units.

In addition, in the above example, the object is detected as being blocked by the object and the light emitting surface image is interrupted or shortened. However, the detection method of the object is not limited to this. For example, a time difference image that is a difference between the latest difference image and the difference image before a predetermined time may be obtained, and it may be determined whether a value equal to or greater than a predetermined value exists in the time difference image. In this method, if there is no object, the time difference image becomes almost zero value in the foreground. In addition, if a moving object exists, a portion having a predetermined value or more appears in the time difference image. For this reason, if there exists a part more than predetermined value, it can be determined that an object exists. According to this method, it is possible to efficiently detect only moving objects such as passengers, without removing dust which is attached to the light emitting surfaces 11a and 12a and not moving.

In addition, in the above example, the presence or absence of an object was monitored by both the first and second detection devices 22 and 23 from a predetermined time before the door opening start until the door opening start, but at this time, Only the detection device 22 can monitor the presence or absence of an object.

Moreover, although the slide door apparatus of the system of opening to both sides was demonstrated in the said example, this invention can be applied also to the system of opening to one side, and it is not specifically limited to the number of cage doors and landing doors.

In addition, in the above example, the present invention is applied to an elevator door apparatus, but it is also applicable to a landing door apparatus. Moreover, the slide door apparatus of this invention can be applied also to the entrance door of vehicles, the doorway of vehicles, etc. which are installed in a building, and the doorway of the platform of a train, for example.

1: car 1a: car door
2a, 2b: car door 3: car door frame
3a: first vertical frame 3b: second vertical frame
3c: upper horizontal frame 3d: lower male frame
4: cage operation panel 5: display device
6: alarm device 7: floor designation button
8: Door open button 9: Door closed button
10: indicator light 11: 1st light emitter
12: second light emitter 13: first camera
14: second camera 15: the first floodlight
16: first receiver 17: second emitter
18: second receiver

Claims (7)

A door configured to move horizontally to open and close the doorway;
A first detection device having a light emitter disposed at a side of the doorway and an image pickup means for imaging the light emitter opposite the light emitter with the doorway interposed therebetween to detect an object present in the doorway;
A second detector for detecting an object in the vicinity of the side of the door, including a light emitter that emits a light beam along the side of the doorway, and a light receiver that receives the light beam from the light projector; And
And a control device for controlling the opening and closing of the door based on information from the first and second detection devices,
And the light emitter and the light emitter emit light of different wavelengths. The method according to claim 1, wherein the control device monitors whether an object is detected by at least one of the first and second detection devices from a predetermined time before the door opening start until the door opening start, the door from the door opening start A sliding door device that monitors whether an object is detected by the second detection device only until fully open. The alarm apparatus according to claim 2, further comprising a warning device for generating a warning to a user near the doorway,
The control device generates a warning by the alarm device when an object is detected by at least one of the first and second detection devices from a predetermined time before the door opening start until the door opening start, and starts the door opening. And an alarm is generated by the alarm device when an object is detected by the second detection device only from the time of the door to the full opening of the door. 3. The control apparatus according to claim 2, wherein the control device executes the door opening operation at a lower speed than usual when an object is detected by at least one of the first and second detection devices from a predetermined time before the door opening start until the door opening start. Slide door device. The light emitting device of claim 1, wherein the light emitter includes a first light emitter provided at one side of the doorway and a second light emitter provided at the other side of the doorway,
The imaging means includes a first imaging means provided on one side of the doorway, and a second imaging means provided on the other side of the doorway,
The light emitter includes a first light emitter provided at one side of the entrance and a second light emitter provided at the other side of the entrance,
The light receiver includes a first light receiver provided at one side of the entrance and a second light receiver provided at the other side of the entrance,
Any one of the first light emitter, the first imaging means, the first light emitter and the first light receiver is mounted in a first housing,
And any one of the second light emitter, the second imaging means, the second light emitter, and the second light receiver is mounted in a second housing. delete Elevator cars which are elevated in the hoistway;
An elevator door configured to move horizontally to open and close an entrance and exit installed between the car and the platform;
A first detection device having a light emitter disposed at a side of the doorway and an image pickup means for imaging the light emitter opposite the light emitter with the doorway interposed therebetween to detect an object present in the doorway;
A second detector for detecting an object in the vicinity of the side of the door, including a light emitter that emits a light beam along the side of the doorway, and a light receiver that receives the light beam from the light projector; And
A control device for controlling opening and closing of the elevator door based on information from the first and second detection devices,
And the light emitter and the light emitter emit light of different wavelengths.

Images