JP2007314285A - Elevator door control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator door control device capable of reducing false detections when a door is opened while preventing small passengers including children from being pulled into a door pocket. <P>SOLUTION: A photoelectric device 7 as an obstacle detection unit is embedded on a sill part 1a side of a longitudinal frame 5. When the photoelectric device 7 detects an obstacle, the distance from the obstacle on which the detection light 7c is incident to the light receiving position of a light receiving unit 7b by measuring the frequency or the like of the reflected light 7d. Further, a door opening/closing control device 8 as a door opening/closing control unit is connected to the photoelectric device 7. Still further, the photoelectric device 7 transmits distance information to the door opening/closing control device 8. The effective detection range and the invalid range are set in the door opening/closing control device 8. The effective detection range means a range to the predetermined height from a part in a vicinity of the sill part 1a, in which the obstacle detected by the photoelectric device 7 is determined to be effective. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  In order to prevent an obstacle from being drawn into a gap provided at an entrance such as a gap between an elevator door and an entrance / exit frame, the present invention can The present invention relates to an elevator door control device that controls opening and closing.

A gap with a width of about several mm exists between a general elevator door and an entrance / exit frame (entrance / entrance column), and an obstacle such as a hand of a child with a small height may enter the gap. In some cases, an obstacle is drawn into the gap as the elevator door is opened.
In contrast to this pull-in, in a conventional elevator apparatus, a light receiver provided on the upper frame of the entrance / exit frame receives detection light emitted along the vertical frame of the entrance / exit frame by a projector provided on the floor side of the entrance / exit frame. When the light is received and the detection light is interrupted when the elevator door is opened, an obstacle near the vertical frame is detected, and the opening / closing of the elevator door is controlled according to the obstacle detection status. This prevents the obstacles from being pulled in due to the opening (see, for example, Patent Document 1).

JP 2002-265175 A

  In the conventional elevator apparatus as described above, the detection light is monitored until the elevator door is fully opened, and the obstacle detection range is from near the floor to the upper frame. The detection light may be blocked by a part of the body such as a shoulder of a passenger who is going to get on and off, and the control unit may determine that an obstacle has been detected. When the door opening is stopped by detecting an obstacle in this case, the passenger may get in and out of the car.

  The present invention has been made to solve the above-described problems, and facilitates passengers to get in and out of a car while preventing children's passengers from being drawn into a gap provided at an entrance. It is an object to obtain an elevator door control device that can be used.

  The elevator door control device according to the present invention detects an obstacle near the gap between the surface of the elevator door and the surface of the entrance / exit frame facing the elevator door, and measures the height of the detected position of the obstacle. Receives information on the height of the detected position of the obstacle from the obstacle detecting unit and the obstacle detecting unit, and depending on whether the height of the detected position of the obstacle is equal to or less than a predetermined height set in advance A door opening / closing control unit for controlling the opening / closing of the elevator door.

  In the elevator door control device according to the present invention, since the opening / closing of the elevator door is controlled according to whether the height of the detected position of the obstacle is equal to or lower than a predetermined height set in advance, it is more than the detected position of the adult. The detection position of the child is generally lower, so that the child at the detection position below the predetermined height is prevented from being pulled into the gap between the elevator door and the entrance / exit frame. By not detecting the adult who is the detected position exceeding the height, the passenger can get on and off the car smoothly.

The best mode for carrying out the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
FIG. 1 is a front view showing a car door according to Embodiment 1 of the present invention. FIG. 2 is a block diagram specifically showing the door opening / closing control device 8 of FIG.
In the figure, a sill 1a is provided at the entrance of the car 1 that moves up and down the hoistway. Further, the entrance / exit of the car 1 is opened and closed by a single-open car door (elevator door) having a high-speed door 2 and a low-speed door 3. Further, an entrance / exit frame 4 is provided at the entrance / exit of the car 1. The entrance / exit frame 4 has a pair of vertical frames 5 parallel to the vertical direction, and an upper frame 6 provided between the pair of vertical frames 5 and parallel to the horizontal direction.

  On the side of the sill 1a of the vertical frame 5, a photoelectric device 7 as an obstacle detection unit is embedded. The photoelectric device 7 includes a light projecting unit 7a and a light receiving unit 7b. The light projecting unit 7 a emits detection light 7 c along the vertical frame 5. In the light receiving unit 7b, the emitted detection light 7c enters the obstacle, and receives the reflected light 7d by reflection of the detection light 7c. Therefore, the photoelectric device 7 has an obstacle in the vicinity of the vertical frame 5 (near the gap between the surface of the low speed door 3 and the opposing surface of the low speed door 3 of the vertical frame 5) when the light receiving unit 7b receives the reflected light 7d. Is detected.

  Further, when detecting the obstacle, the photoelectric device 7 measures the distance from the detected position of the obstacle on which the detection light 7c is incident to the light receiving position of the light receiving unit 7b by measuring the frequency of the reflected light 7d. . Furthermore, the photoelectric device 7 generates distance information indicating the measurement result of the distance to the detected position of the obstacle. Furthermore, an obstacle detection state of the photoelectric device 7 is monitored by a door opening / closing control device (control microcomputer) 8 as a door opening / closing control unit. The photoelectric device 7 also sends distance information to the door opening / closing control device 8.

  The door opening / closing control device 8 includes a CPU 8a that performs arithmetic processing, a RAM 8b that stores calculation results of the CPU 8a, a ROM 8c that stores a program for operating the door opening / closing control device 8, and a pulse signal received from the outside. A pulse counting unit (pulse counting unit) 8d for receiving, an input / output unit (input / output port) 8e for receiving distance information from the photoelectric device 7, and a PWM (Pulse Width Modulation) signal output unit (PWM unit) 8f for generating a PWM signal have.

  When the door opening / closing control device 8 receives a door opening command from an elevator control device (not shown) that controls the raising / lowering of the car 1, the door opening / closing control device 8 opens and closes the high speed door 2 and the low speed door 3 via the drive control device 9. The rotation of the door motor 10 to be driven is controlled. That is, the door opening / closing control device 8 controls the opening / closing of the high-speed door 2 and the low-speed door 3. The drive control device 9 includes a gate signal output unit (gate signal generation circuit) 9a that generates a gate signal in response to the PWM signal from the door opening / closing control device 8, and a drive having a magnitude based on the gate signal from the gate signal output unit. And a drive voltage output unit (power circuit) 9 b for outputting a voltage to the door motor 10. A pulse encoder 11 that generates a pulse signal corresponding to the rotation is attached to the rotation shaft of the door motor 10. The pulse signal generated from the pulse encoder 11 is transmitted to the door opening / closing control device 8 and counted by the pulse counting unit 8d.

  Furthermore, an effective detection range and an ineffective range are set in the door opening / closing control device 8. The effective detection range is a range from the vicinity of the sill portion 1a to a predetermined height (for example, 1000 mm), and is a range in which an obstacle detected by the photoelectric device 7 is effective. The invalid range is a range from a predetermined height to the upper frame 6 and is a range in which the obstacle detected by the photoelectric device 7 is invalid. Furthermore, the door opening / closing control device 8 divides the valid detection range and the invalid range from each other by a preset threshold value. This threshold value is a value corresponding to a predetermined height between the vicinity of the threshold 1a and the upper frame 6.

  The door opening / closing control device 8 determines whether the height of the detected position of the obstacle is within the effective detection range based on the distance information from the photoelectric device 7 and the set threshold value. If the obstacle is within the effective detection range, the door opening / closing control device 8 determines that the detected obstacle is valid. On the other hand, if the received reflected light 7d is in the invalid range, the door opening / closing control device 8 determines that the detected obstacle is invalid.

  Further, when the door opening / closing control device 8 determines that the detected obstacle is effective when the high-speed door 2 and the low-speed door 3 are opened, the door opening / closing control device 8 performs a pull-in preventing operation. The pull-in prevention operation is an operation by the door opening / closing control device 8 for preventing an obstacle including a passenger from being drawn into a gap (door pocket) between the low-speed door 3 and the vertical frame 5, for example, the high-speed door 2. In addition, the opening of the low-speed door 3 is stopped, the high-speed door 2 and the low-speed door 3 in the middle of opening are reversed and closed, or an audio announcement is output into the car 1.

  Next, the operation will be described. First, when the door opening command is output from the elevator control device when the high-speed door 2 and the low-speed door 3 are fully closed, the door opening / closing control device 8 that has received the door opening command starts opening the high-speed door 2 and the low-speed door 3. Is done. At this time, the detection light 7c is emitted from the light projecting unit 7a, and the photoelectric device 7 monitors whether or not the light receiving unit 7b receives the reflected light 7d generated when the detection light 7c enters the obstacle. .

  When the light receiving unit 7b receives the reflected light 7d, the photoelectric device 7 measures the distance from the light receiving position of the light receiving unit 7b to the detected position of the obstacle by measuring, for example, the frequency of the reflected light 7d, The distance information is sent to the door opening / closing control device 8. Receiving the distance information, the door opening / closing control device 8 confirms whether or not the detected position of the obstacle is within the effective detection range. If the detected position of the obstacle is not within the effective detection range, the door opening / closing control device 8 determines that the detected obstacle is invalid, and opens the high-speed door 2 and the low-speed door 3 as they are. On the other hand, if the detected position of the obstacle is within the valid detection range, the door opening / closing control device 8 determines that the obstacle is valid and performs a pull-in preventing operation. When the photoelectric device 7 has not detected an obstacle, the door opening / closing control device 8 opens the high-speed door 2 and the low-speed door 3 as they are.

  In the elevator door control device as described above, when an obstacle is detected by the photoelectric device, the high-speed door and the low-speed door are controlled depending on whether the height of the detected position of the obstacle is equal to or lower than a predetermined height. Because the door opening and closing is controlled, the detected position of the child is generally lower than the detected position of the adult, so that the elevator door and the entrance frame are for the detected position below the predetermined height. By not detecting an adult who is a detected position exceeding a predetermined height while preventing pulling into the gap between the passenger and the passenger, the passengers can smoothly get on and off the car, improving passenger convenience Can be improved.

Embodiment 2. FIG.
Next, a second embodiment of the present invention will be described. FIG. 3 is a front view showing an elevator door according to the second embodiment. In the figure, in the first embodiment, the photoelectric device 7 is embedded on the sill portion 1a side of the vertical frame 5, but in the second embodiment, the photoelectric device 7 is embedded on the door pocket side of the upper frame 6. Yes. The light projecting unit 7 a emits detection light 7 c along the vertical frame 5 from the upper frame 6 toward the sill unit 1 a. Other configurations and operations are the same as those in the first embodiment.

  In the elevator door control device as described above, even if the photoelectric device is arranged on the door pocket side of the upper frame, the same effect as in the first embodiment can be obtained.

Embodiment 3 FIG.
Next, a third embodiment of the present invention will be described. FIG. 4 is a front view showing an elevator door according to the third embodiment. In the figure, in Embodiment 2, the photoelectric device 7 is embedded on the door pocket side of the upper frame 6, but in Embodiment 3, the photoelectric device 7 is embedded on the upper frame 6 side of the vertical frame 5. The light projecting unit 7 a emits detection light 7 c along the vertical frame 5 from the upper frame 6 side of the vertical frame 5 toward the sill unit 1 a. Other configurations and operations are the same as those in the second embodiment.

  In the elevator door control device as described above, even when the photoelectric device is arranged on the upper frame side of the vertical frame, the same effects as those of the first embodiment can be obtained.

Embodiment 4 FIG.
Next, a fourth embodiment of the present invention will be described. FIG. 5 is a front view showing an elevator door according to the fourth embodiment. In the figure, in the third embodiment, a single photoelectric device 7 is embedded in the vertical frame 5, but in the fourth embodiment, a plurality (two) of photoelectric devices 7 are vertically spaced apart from each other in the vertical direction. 5 is embedded in the middle part. The light projecting portions 7 a of the respective photoelectric devices 7 emit the detection light 7 c so as to cross each other and along the vertical frame 5. In the door opening / closing control device 8, information on the installation position of each photoelectric device 7 is registered. Further, the door opening / closing control device 8 receives distance information from each photoelectric device 7. Then, the door opening / closing control device 8 determines whether the obstacle is within the effective detection range based on the distance information received from each photoelectric device 7 and the information on the installation position of each photoelectric device 7. Other configurations and operations are the same as those in the third embodiment.

  In the elevator door control device as described above, the same effect as in the first embodiment can be obtained even when a plurality of photoelectric devices are arranged in a vertical frame.

Embodiment 5 FIG.
Next, a fifth embodiment of the present invention will be described. FIG. 6 is a front view showing an elevator door according to the fifth embodiment. In the figure, in the fourth embodiment, the detection lights 7c from the light projecting unit 7a are emitted so as to cross each other, but in the fifth embodiment, the detection lights 7c from the light projecting unit 7a are parallel to each other. In this way, the light is emitted from the middle portion of the vertical frame 5 toward the sill portion 1a. Other configurations and operations are the same as those in the fourth embodiment.

  In the elevator door control device as described above, the same effect as in the first embodiment can be obtained even when a plurality of photoelectric devices are arranged in a vertical frame.

  In the fourth and fifth embodiments, the two photoelectric devices 7 are arranged in the vertical frame 5. However, the number is not limited to two, and three or more obstacle detection units are arranged in the vertical frame. Also good.

  Moreover, although Embodiment 1-5 demonstrated the single-opening type elevator door, you may apply this invention to a double-opening type elevator door.

Embodiment 6 FIG.
Next, a sixth embodiment of the present invention will be described. FIG. 7 is a front view showing an elevator door according to the sixth embodiment. In the figure, in the first embodiment, the photoelectric device 7 is embedded on the side of the sill 1a of the vertical frame 5, but in the sixth embodiment, the photoelectric device 7 is placed on the side surface portion of the low-speed door 3 on the side opposite to the opening side. Buried. The photoelectric device 7 detects an obstacle in the vicinity of the gap between the end of the high-speed door 2 on the opening direction side and the end of the low-speed door 3 on the anti-opening direction side. Other configurations and operations are the same as those in the first embodiment.

  In the elevator door control device as described above, when an obstacle is detected by the photoelectric device, the high-speed door and the low-speed door are controlled depending on whether the height of the detected position of the obstacle is equal to or lower than a predetermined height. Because it controls the opening and closing of the door, the detected position of the child is generally lower than the detected position of the adult. By not detecting an adult who is a detected position exceeding a predetermined height while preventing pulling into the gap between the passenger and the passenger, the passengers can smoothly get on and off the car, improving passenger convenience Can be improved.

Embodiment 7 FIG.
Next, a seventh embodiment of the present invention will be described. FIG. 8 is a front view showing an elevator door according to the seventh embodiment. In the figure, in the sixth embodiment, the photoelectric device 7 is embedded in the side portion of the low-speed door 3 on the side opposite to the opening side, but in the seventh embodiment, the photoelectric device 7 is anti-opened on the upper end portion of the low-speed door 3. It is attached to protrude in the direction side. The photoelectric device 7 moves together with the low-speed door 3. Other configurations and operations are the same as those in the sixth embodiment.

  In the elevator door control device as described above, even when the photoelectric device is mounted so as to protrude in the anti-opening direction side of the upper end portion of the low-speed door, the same effect as in the sixth embodiment can be obtained. Can do.

Embodiment 8 FIG.
Next, an eighth embodiment of the present invention will be described. FIG. 9 is an explanatory diagram for explaining a plurality of effective detection ranges set in the door opening / closing control device 8 according to the eighth embodiment. In the figure, the door opening / closing control device 8 is set with effective detection ranges A and B which are detection ranges from the vicinity of the sill portion 1a to different heights. Here, as an example of the detection ranges of the effective detection ranges A and B, the effective detection range A is a detection range from the vicinity of the sill 1a to the vicinity of the upper frame 6, and the effective detection range B is a predetermined range from the sill 1a. This is a detection range up to a height (about 1000 mm).

  In the door opening / closing control device 8, positions C and D are set between the fully closed position and the fully open position of the high-speed door 2 and the low-speed door 3. Further, the door opening / closing control device 8 monitors the position of the front end portion (the end portion on the non-open side) of the high-speed door 2 based on the pulse signal from the pulse encoder 11. Furthermore, the door opening / closing control device 8 switches between the effective detection range A, the effective detection range B, and the detection stop according to the position of the tip portion of the high-speed door 2. Other configurations are the same as those in any of the first to seventh embodiments.

  Next, the operation will be described. FIG. 10 is a flowchart showing the detection range switching operation of the door opening / closing control device 8 according to the eighth embodiment. In the figure, first, the door opening / closing control device 8 confirms whether or not the door opening operation has been started upon receipt of the door opening command from the elevator control device (step S1), and waits until the door opening command is received. When the door opening operation is started, the door opening / closing control device 8 sets the obstacle detection range as the effective detection range A (step S2). Then, the door opening / closing control device 8 confirms whether the tip of the high-speed door 2 has reached the position C from the fully closed position (step S3), and the tip of the high-speed door 2 is positioned. The detection range remains the effective detection range A until C is reached.

  When the front end of the high-speed door 2 reaches the position C from the fully closed position, the door opening / closing control device 8 switches the detection range from the effective detection range A to the effective detection range B (step S4). Then, the door opening / closing control device 8 confirms whether the tip of the high-speed door 2 has reached the position D from the position C (step S5), and the tip of the high-speed door 2 is located at the position D. The detection range remains the effective detection range B until it reaches When the leading end of the high-speed door 2 reaches the position D from the position C, the door opening / closing control device 8 stops detection (step S6) and invalidates the photoelectric device 7. And when the front-end | tip part of the high-speed door 2 reaches the full open position from the position D, the switching operation of the detection range by the door opening / closing control apparatus 8 is complete | finished.

  In the elevator door control device as described above, the effective detection range is switched in accordance with the position of the tip of the high-speed door, so that both the prevention of obstacle pull-in and the reduction of false detection when the door is opened can be achieved at the same time. Can do.

  Moreover, when the position of the front-end | tip part of a high-speed door reaches the position D from the position C, since a photoelectric device is made invalid, the false detection at the time of a door opening can further be reduced. Accordingly, passengers can get on and off the car more smoothly, and passenger convenience can be further improved.

  In addition, although Embodiment 8 demonstrated the single-opening type elevator door, you may apply this invention to a double-opening type elevator door.

  In the eighth embodiment, two types of effective detection ranges of the effective detection ranges A and B are set in the door opening / closing control device 8, but three or more types of effective detection ranges are set in the door opening / closing control unit. May be.

  Furthermore, although Embodiment 1-8 demonstrated the car door, this invention may be applied to a landing door.

  Furthermore, in the first to eighth embodiments, the distance from itself to the obstacle is measured by measuring the frequency of the reflected light 7d, but the obstacle from itself is measured by measuring the intensity of the reflected light. May be measured.

  In the first to eighth embodiments, the photoelectric device 7 is used as the obstacle detection unit, but is not limited to the photoelectric device, and an ultrasonic device may be used as the obstacle detection unit. In this case, the ultrasonic device can be realized by outputting a detection wave by the ultrasonic wave, receiving a reflected wave by reflection of the detection wave from the obstacle, and measuring a distance to the obstacle by the reflected wave. .

It is a front view which shows the elevator door by Embodiment 1 of this invention. It is a block diagram which shows the door opening / closing control apparatus of FIG. 1 concretely. It is a front view which shows the elevator door by Embodiment 2 of this invention. It is a front view which shows the elevator door by Embodiment 3 of this invention. It is a front view which shows the elevator door by Embodiment 4 of this invention. It is a front view which shows the elevator door by Embodiment 5 of this invention. It is a front view which shows the elevator door by Embodiment 6 of this invention. It is a front view which shows the elevator door by Embodiment 7 of this invention. It is explanatory drawing for demonstrating the some effective detection range set to the door opening / closing control apparatus by Embodiment 8 of this invention. It is a flowchart which shows the switching operation of the detection range of the door opening / closing control apparatus by Embodiment 8 of this invention.

Explanation of symbols

  1a sill part, 2 high speed door, 3 low speed door, 4 doorway frame, 5 vertical frame, 6 upper frame, 7 photoelectric device (obstacle detection unit), 8 door open / close control device (door open / close control unit).

Claims (9)

An obstacle detection unit that detects an obstacle near the gap between the surface of the elevator door and the facing surface of the elevator door in the entrance / exit frame, and measures the height of the detected position of the obstacle, and the obstacle Information on the height of the detected position of the obstacle is received from the detection unit, and the elevator door is opened and closed depending on whether the height of the detected position of the obstacle is equal to or lower than a predetermined height. An elevator door control device comprising a door opening / closing control unit to be controlled. The obstacle detection unit is disposed on the sill part side of the vertical frame provided at the entrance and parallel to the vertical direction so as to detect the obstacle along the vertical frame, and measures the distance to the obstacle. And
In the door opening and closing control unit, an effective detection range from the vicinity of the sill portion to the predetermined height is set,
The door opening / closing control unit is configured such that the height of the detected position of the obstacle is the predetermined height based on the distance information to the obstacle received from the obstacle detection unit and the effective detection range. The elevator door control device according to claim 1, wherein it is determined whether or not: A plurality of the obstacle detection units are arranged in a vertical frame provided in the entrance / exit frame and parallel to the vertical direction so as to detect the obstacles along the vertical frame at intervals from each other,
Each obstacle detection unit measures the distance to the obstacle,
In the door opening / closing control unit, an effective detection range from the vicinity of the sill part to the predetermined height and position information for each obstacle detection unit are set,
The door opening / closing control unit is configured to cover the obstacle based on the distance information received from the obstacle detection unit, the effective detection range, and the position information for each obstacle detection unit. 2. The elevator door control device according to claim 1, wherein it is determined whether or not the height of the detection position is equal to or less than the predetermined height. An elevator door control device for controlling opening and closing of a single-open elevator door having a high-speed door and a low-speed door,
An obstacle detection unit that detects an obstacle near the gap between the high-speed door and the low-speed door and measures the height of the detection position of the obstacle, and the detection of the obstacle from the obstacle detection unit A door opening / closing controller that receives information on the height of the position and controls the opening / closing of the elevator door according to whether or not the height of the detected position of the obstacle is equal to or lower than a predetermined height set in advance. An elevator door control device. The obstacle detection unit is arranged to detect an obstacle along the end surface part on the sill part side of the end surface part on the side opposite to the opening direction of the low-speed door, and measures the distance to the obstacle.
In the door opening and closing control unit, an effective detection range from the vicinity of the sill portion to the predetermined height is set,
The door opening / closing control unit is configured such that the height of the detected position of the obstacle is the predetermined height based on the distance information to the obstacle received from the obstacle detection unit and the effective detection range. The elevator door control device according to claim 4, wherein it is determined whether or not: The obstacle detection unit is disposed so as to protrude from the upper end of the low-speed door to the anti-opening direction side so as to detect the obstacle along the end surface portion on the anti-opening direction side of the low-speed door, and While moving together with a low-speed door, measure the distance to the obstacle,
In the door opening and closing control unit, an effective detection range from the vicinity of the sill part to the predetermined height is set,
The door opening / closing control unit is configured such that the height of the detected position of the obstacle is the predetermined height based on the distance information to the obstacle received from the obstacle detection unit and the effective detection range. The elevator door control device according to claim 4, wherein it is determined whether or not: In the door opening / closing control unit, a plurality of effective detection ranges with different detection ranges can be set,
The said door opening / closing control part is monitoring the position of the said elevator door, The said effective detection range is changed according to the position of the said elevator door, The any one of Claim 2-6 characterized by the above-mentioned. The elevator door control device according to claim 1.   The obstacle detection unit is a photoelectric device that emits detection light, receives reflected light due to reflection of the detection light by the obstacle, and measures the height of the detected position of the obstacle by the reflected light. The elevator door control device according to any one of claims 1 to 7, wherein the elevator door control device is provided.   The obstacle detection unit outputs a detection wave by ultrasonic waves, receives a reflected wave due to reflection of the detection wave by the obstacle, and measures the height of the detected position of the obstacle by the reflected wave. The elevator door control device according to any one of claims 1 to 7, wherein the elevator door control device is an ultrasonic device.

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