JP2011051753A - Caught-in detecting device of elevator door - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a caught-in detecting device superior in safety, by reversing an elevator door in the early stage, by detecting even foreign matter of a small cross section in the closely adjacent stage. <P>SOLUTION: A car door driven by a door opening-closing driving device or a landing door for opening-closing while being engaged with the car door, has a control device for reversely operating the car door based on detection output from an approach detection sensor, by installing the sheet-like approach detection sensor on the side facing the car door or the landing door on the vertical frame reverse side. <P>COPYRIGHT: (C)2011,JPO&amp;INPIT

Description

  The present invention relates to a retracted detection device, and more particularly to a retracted detection device disposed around an elevator door.

  2. Description of the Related Art Conventionally, many elevator door pull-in detection devices have been proposed in which a corner on the door panel side of a three-sided frame is made movable and a corner is pushed by a switch.

  In recent years, a retracted detection device including a pressure sensor has been proposed (see, for example, Patent Document 1). This is provided with a sheet-like pressure sensor on the door-closing direction front end surface of the slide door or the door-contacting surface of the door-contacting member facing the door-closing direction front end surface, and the pressure-sensitive sensor during the door closing operation An alarm signal is generated based on the detected output.

JP 2007-137555 A

  In the prior art, the switch detects that the movable corner on the side of the door panel of the three-sided frame has been displaced by a foreign object. For example, when a foreign object such as a child's finger is drawn, the door panel of the three-sided frame There is a possibility that the amount of displacement of the movable corner portion on the side is small and the pull-in cannot be detected.

  Moreover, in the retracted detection device provided with the pressure-sensitive sensor, it is possible to finally detect the pull-in, but since it cannot be detected until it is pressed, there is a possibility that it cannot be detected unless it is largely retracted.

  Therefore, the present invention has been made in view of the above points, and even a foreign object having a small cross section is detected at a close stage, and the elevator door is reversed at an earlier stage than before by the detection output, and is excellent in safety. The purpose is to obtain a detection device.

  According to one aspect of the present invention, in a car door driven by a door opening / closing drive device or a landing door that opens and closes while being engaged with the car door, a sheet-like approach detection sensor is connected to the back side of the car door or the vertical frame. An elevator door retract detection device is provided, comprising a control device that is attached to the side facing the landing door and that reverses the car door based on a detection output from the approach detection sensor. .

  According to another aspect of the present invention, when the car door or the landing door is a door panel with a window, the opening / closing door position is detected by another sensor, and the position data and the proximity detection waveform are used as a reference waveform. And detecting an approaching object based on a change from the reference waveform.

  According to the present invention, since it is possible to detect accurately and quickly with a simple structure, the safety is excellent. Further, by monitoring the waveform, it is possible to detect breakage and failure, and it is possible to easily determine whether or not it is operating normally.

It is the schematic at the time of applying the proximity detection sensor 1 used for the drawing-in detection apparatus which concerns on this embodiment to two double doors. It is a figure showing the positional relationship of the proximity detection sensor and door panel in a door closed state and a door open state. It is explanatory drawing explaining the equivalent circuit of a sensor element. It is explanatory drawing explaining the electric circuit of a proximity detection sensor. It is an example of the reference waveform of a proximity detection waveform when applied to a panel with a window. It is the schematic when a separate proximity detection sensor 1 is affixed other than a window part and a window part. It is the schematic when the proximity detection sensor 1 is attached in U shape. It is the schematic at the time of applying between the panels of a two-piece single door.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected about the same location and the overlapping description is abbreviate | omitted.

(First embodiment)
A first embodiment will be described with reference to FIGS. FIG. 1 is a schematic diagram when the proximity detection sensor 1 used in the retracted detection device according to the present embodiment is applied to a double door, and FIG. 2 shows an approach detection sensor in a door-closed state and a door-open state. It is a figure showing the positional relationship of a door panel.

  As shown in FIG. 1, the sheet-like approach detection sensor 1 is attached to the surface of the three-way frame (or entrance pillar) 2 facing the door panel 3. The proximity detection sensor 1 is attached over substantially the entire length of the three-way frame 2.

  Here, as the sheet-like approach detection sensor, for example, a sensor having a detection plate made of a pair of electrodes and detecting the approach of a human body or the like as a change in capacitance of the detection plate is used. For example, a sensor element is formed by dispersing coiled carbon fibers having an inductance (L) component, a capacitance (C) component, and a resistance component (R) based on a coil shape and functioning as an LCR resonance circuit in a base material. A proximity detection sensor comprising a pair of electrodes electrically connected to the sensor element, a high-frequency oscillation circuit connected between the electrodes, and a detection circuit for detecting a signal changing based on the LCR resonance circuit Is preferred. As an example, an equivalent circuit of such a sensor element is shown in FIG. As shown in FIG. 3, the coiled carbon fiber 12 has a specific inductance (L) component, capacitance (C) component, and resistance (R) component as electromagnetic characteristics based on its coil shape (spiral shape). is doing. Furthermore, a number of coiled carbon fibers 12 are connected via a C component by the base material 13. For this reason, the coiled carbon fiber 12 forms an LCR resonance circuit based on the LCR component and forms a complex resonance circuit with the base material 13 including a large number of coiled carbon fibers 12.

  Next, an electric circuit of the proximity detection sensor 1 will be described. As shown in FIG. 4, the detection circuit 16 includes a high-frequency oscillation circuit (AC circuit) 19 that applies a high-frequency signal to the sensor element 11, an amplification circuit 20 that amplifies an output signal from the sensor element 11, and a signal from the amplification circuit 20. In addition, a detection circuit 22 and an output circuit 23 to which a signal from the high-frequency oscillation circuit 19 via the phase adjustment circuit 21 is input are provided. The detection circuit 22 obtains an output signal by comparing the signal from the amplifier circuit 20 with the signal from the high-frequency oscillation circuit 19. The sensor element 11 has a specific impedance, and the detection object 24 also has a specific impedance. Since a high frequency signal having a predetermined frequency is applied to the sensor element 11 from the high frequency oscillation circuit 19, an alternating electric field is generated in the vicinity of the sensor element 11. Since the sensor element 11 has a capacitance (C) component between the sensor element 11 and the detection target object 24 in addition to the capacitance (C) component of the sensor element 11, the detection target object 24 has the sensor element 11. When both are close to each other, both the capacitance (C) components fluctuate as a whole. The overall impedance from the detection object 24 to the sensor element 11 changes due to such overall fluctuation. When the detection object 24 comes into contact with the sensor element 11, the entire resistance (R) component of the sensor element 11 and the detection object 24 changes, and the change reaches the sensor element 11 from the detection object 24. The overall impedance changes. Then, the amount of change in the overall impedance changes the voltage and phase of the high-frequency signal applied to the sensor element 11, and the amount of change is amplified by the amplifier circuit 20 and input to the detection circuit 22. By detecting together with the high-frequency signal input to the detection circuit 22 via the adjustment circuit 21, a continuous change in impedance due to the approach of the detection object 24 is detected. The obtained detection signal is sent to the output circuit 23 and is output from the output circuit 23 as, for example, a voltage.

  Such an approach detection sensor is preferable because it can detect the approach of the detection object in a stable state with high detection sensitivity.

  When a foreign object is drawn between the three-way frame 2 and the door panel 3 and the foreign object approaches or comes into contact with the proximity detection sensor 1, the proximity detection sensor 1 detects the pull-in and outputs the door panel 3 so as to be reversed. The proximity detection sensor 1 and the door panel 3 are parallel to each other, and the distance between the proximity detection sensor 1 and the door panel 3 is kept constant even when the door panel 3 is opened and closed. Therefore, as long as no foreign matter is drawn in, there is nothing in contact with or in proximity to the proximity detection sensor 1, so the proximity detection sensor 1 will not react.

  Further, as shown in FIG. 2, the door panel 3 does not disappear from the detection range of the proximity detection sensor 1 even in the door closed state and the door open state which are the movable limits of the door panel 3, and is always kept at a certain distance on the front surface. The proximity detection sensor 1 does not react.

  According to the present embodiment, the detection can be performed with a simple structure and more accurately and quickly than before. Further, by monitoring the waveform, it is possible to detect breakage and failure, and it is possible to easily determine whether or not it is operating normally.

(Modification)
Even if the approach detection sensor 1 does not detect the pull-in, the approach detection sensor 1 always outputs a weak waveform due to the door panel 3 or the surrounding environment. Therefore, by constantly monitoring the waveform, if a weak waveform is not output, it is possible to infer whether the proximity detection sensor 1 is broken or pulled in and the detector is malfunctioning. Can also be easily determined.

(Second Embodiment)
Next, a second embodiment will be described with reference to FIG. FIG. 5 is an example of the reference waveform of the proximity detection waveform when applied to a panel with a window.

  In the case of a structure in which the window portion is not flush with the windowed panel, the distance between the proximity detection sensor 1 and the door panel 3 cannot be kept constant due to the level difference of the window portion. Therefore, if it is detected in the same manner as in the first embodiment, there is a risk of erroneous detection. Therefore, the door position is detected by the pulse count of the encoder attached to the door drive motor (not shown), and the position data and the proximity detection waveform 4 as shown in FIG. 5 output from the proximity detection sensor 1 are stored as a reference waveform. When a foreign object is drawn in, it deviates from the reference waveform and, for example, the output increases, so that an adjacent object can be detected with the amount of change from the reference waveform.

  Therefore, even if the distance between the proximity detection sensor 1 and the door panel 3 changes due to the step of the window, the change in the distance is registered as the reference waveform, so that the step of the window is not erroneously detected.

(Third embodiment)
Next, a third embodiment will be described with reference to FIG. FIG. 6 is a schematic view when a separate proximity detection sensor 1 is attached to a window portion other than the window portion.

  As in the second embodiment, in the panel 5 with a window, as a countermeasure for erroneous detection at the step of the window portion, the central passage detection sensor 1 in FIG. The proximity detection sensor 1 is attached.

  In the third embodiment, the same control as that of the second embodiment is applied to the output of the central approach detection sensor 1, and the same control as that of the first embodiment is applied to the outputs of the upper and lower approach detection sensors 1. Take control. Therefore, as in the second embodiment, it is possible to perform detection with higher accuracy than in the case where the pulling in of the foreign matter is detected by the total amount change from the upper and lower reference waveforms.

(Fourth embodiment)
Next, a fourth embodiment will be described with reference to FIG. FIG. 7 is a schematic view when the proximity detection sensor 1 is attached in a U shape.

  In 4th Embodiment, as shown in FIG. 7, the proximity detection sensor 1 is attached to the three-way frame 2 in a U-shape. In general, the electrodes are at both ends of the sensor, and the cord is drawn from the top and bottom of the panel. Therefore, a large area is required as a wiring route.

  However, in the fourth embodiment, the wiring path can be simplified by attaching the proximity detection sensor 1 in a U shape.

(Fifth embodiment)
Next, a fifth embodiment will be described with reference to FIG. FIG. 8 is a schematic view when applied between panels of a two-piece door. Here, the panel refers to the surface with the largest area of the door.

  The drawing into the elevator door may occur not only between the three-way frame 2 and the door panel 3 but also between the panels of the two-piece door. Therefore, in the case of a panel with two single doors, as shown in FIG. 8, the proximity detection sensor 1 is attached to the rear side (the side facing the high speed panel 8) of the low speed door 7. With such a configuration, the pull-in between the panels can be detected. If the proximity detection sensor 1 is attached within the range of wrapping with the high speed panel 8, the distance between the proximity detection sensor 1 and the high speed panel 8 is always kept constant. Even in the case of the panel 5 with a window, the same as in the second to third embodiments. If it is attached and controlled, it can be detected in the same manner as the three-way frame 2 and the door panel 3 are pulled.

  Note that the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. Moreover, various inventions can be formed by appropriately combining a plurality of constituent elements disclosed in the above embodiments. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

DESCRIPTION OF SYMBOLS 1 ... Approach detection sensor 2 ... Three-way frame 3 ... Door panel 4 ... Proximity detection waveform 5 ... Panel 7 with a window ... Low speed door 8 ... High speed panel 11 ... Sensor element

Claims (7)

  In a car door driven by a door opening / closing drive device or a landing door that opens and closes while being engaged with the car door, a seat-like approach detection sensor is attached to the side facing the landing door on the back side of the car door or the vertical frame An elevator door pull-in detection device, comprising: a control device that reverses the car door based on a detection output from the proximity detection sensor.   The approach detection sensor is attached to a side close to the front side of the vertical frame side back side, and is arranged so that the panel surface always faces the front of the proximity detection sensor during opening and closing of the car door or the landing door. The elevator door retract detection device according to claim 1.   When the car door or the landing door is a door panel with a window, the opening / closing door position is detected by another sensor, the position data and the proximity detection waveform are stored as a reference waveform, and a proximity object is detected by a change from the reference waveform. The elevator door retracted detection device according to claim 1, wherein:   In the case where the car door or the landing door is a door panel with a window, the separate proximity detection sensor is attached to the part through which the window passes and the other part, and only to the part through which the window passes. 4. An elevator door retract detection device according to claim 3, wherein the proximity object is detected by a change from the reference waveform.   The elevator door pull-in according to claim 1, wherein the proximity detection sensor has a U-shape, and an electrode of the proximity detection sensor is structured to be pulled out from one direction of an upper end or a lower end of the vertical frame. Detection device.   The elevator according to claim 1, wherein the proximity detection sensor is attached to a rear side of the low-speed door of the two-piece door to the side facing the high-speed panel, and the pull-in between the panels is detected. Door retracted detection device.   The output waveform from the proximity detection sensor is constantly monitored, and when the output waveform is no longer detected, the breakage of the proximity detection sensor is determined. Described pull-in detection device.

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