JP2011178553A - Elevator door device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an elevator door device preventing the pinching of an object by using an object detecting device for an elevator door. <P>SOLUTION: The elevator door device includes an elevator car door 1 driven by a driving device 4, a hall door 2 engaging with the car door and opened/closed with the opening/closing operation of the car door 1, the object detecting device 3 provided on the door closed end face of at least one of the car door 1 and the hall door 2 capable of pressure-sensitive detection and proximity detection, and a door control part 12 stopping the door closing operation of the car door 1 and reversing it in the door opening direction when detecting an output signal from the object detecting device 3 during the door closing operation before arrival at a predetermined position, and changing over the object detecting device 3 from a proximity sensor function into a pressure-sensitive sensor function when the car door 1 arrives at the predetermined position without detecting the output signal from the object detecting device 3 before arrival at the predetermined position. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an elevator door device that can detect an object and an adjacent object during door opening and closing operations by providing a carbon microcoil (CMC) sensor on the door of the elevator.

  Safety shoes are used to detect that an object has been caught during the door closing operation of the elevator. The safety shoe is provided at the front end of the car door in the door closing direction, and moves with the door when the door is opened and closed. When the micro-switch detects that the safety shoe has touched the safety shoe during the door closing operation and the safety shoe has been pushed into the door opening direction, the door closing operation is stopped and the door opening operation is switched simultaneously. This is prevented. In recent years, with the development of proximity sensor technology, high-function and high-precision proximity sensors have also been developed (for example, Patent Document 1). This sensor is formed by dispersing a carbon microcoil (CMC) having a coil-shaped inductance (L) component, capacitance (C) component and resistance (R) component in a base material made of a resin such as silicone rubber. It is.

JP 2007-16441 A

  In an elevator door device using a conventional safety shoe, there is a possibility that the microswitch cannot detect an object when the displacement amount of the safety due to the contact of the object is small. Therefore, an object of the present invention is to provide an elevator door device that can reliably prevent an object from being caught by using the object detection device for an elevator door.

  In order to achieve the above object, an elevator door device according to the present invention includes an elevator car door driven by a driving device, a landing door that is engaged with the car door and opens and closes with the opening and closing operation of the car door, and the car. An object detection device provided on at least one of the door and the landing door and capable of pressure-sensitive detection and proximity detection; and when the output signal from the object detection device is detected up to a predetermined position, the car door The car door has reached the predetermined position without detecting the output signal from the object detection device until the predetermined position, and the car door has reached the predetermined position. And a door control unit that switches the object detection device from a proximity sensor function to a pressure-sensitive sensor function.

  According to the present invention, it is possible to prevent an object from becoming an obstacle to door closing.

1 is a perspective view of an elevator door according to a first embodiment of the present invention. 1 is an upper cross-sectional view of an elevator door according to a first embodiment of the present invention. It is detail drawing which shows the structure of the CMC sensor which concerns on the 1st Embodiment of this invention. FIG. 4 shows a waveform pattern of an output signal from a CMC sensor according to the first embodiment of the present invention. It is a figure which shows the object detection by the pressure-sensitive sensor function of the CMC sensor which concerns on the 1st Embodiment of this invention. It is a figure which shows the object detection by the proximity sensor function of the CMC sensor which concerns on the 1st Embodiment of this invention. (A) It is the figure which showed the center open type door opening and closing of the car door which concerns on the 1st Embodiment of this invention. (B) It is the figure which showed the sliding open type door opening and closing of the car door which concerns on the 1st Embodiment of this invention. It is a figure which shows the detection range of the CMC sensor which concerns on the 1st Embodiment of this invention. It is a figure which shows sectional drawing of the door apparatus using the metal sheet which concerns on the 1st Embodiment of this invention. It is a figure which shows the example of attachment of the CMC sensor which concerns on the 1st Embodiment of this invention. It is the figure which showed the door position detection by the door closing position detection sensor which concerns on the 2nd Embodiment of this invention. It is a perspective view of the door apparatus which concerns on the 3rd Embodiment of this invention. (A) It is detail drawing at the time of the door open type center opening type door apparatus for demonstrating the effect | action concerning the 3rd Embodiment of this invention. (B) It is detail drawing at the time of the door open of the sliding open type of the door apparatus for demonstrating the effect | action concerning the 3rd Embodiment of this invention. (A) It is detail drawing of the center open type door apparatus at the time of utilizing the stopper which concerns on the 3rd Embodiment of this invention. (B) It is detail drawing of the sliding open type door apparatus at the time of utilizing the stopper which concerns on the 3rd Embodiment of this invention. It is upper part sectional drawing of the door apparatus which concerns on the 4th Embodiment of this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a perspective view of an elevator door according to a first embodiment of the present invention. FIG. 2 is a sectional view of the elevator door according to the first embodiment of the present invention. FIG. 3 is a detailed view showing the structure of the CMC sensor 3 according to the first embodiment of the present invention. FIG. 4 shows a waveform pattern of an output signal from the CMC sensor 3 according to the first embodiment of the present invention. FIG. 5 is a diagram showing object detection by the pressure-sensitive sensor function of the CMC sensor 3 according to the first embodiment of the present invention. FIG. 6 is a diagram showing object detection by the proximity sensor function of the CMC sensor 3 according to the first embodiment of the present invention. FIG. 7 is a view showing a variation example of opening and closing of the car door 1 according to the first embodiment of the present invention. FIG. 8 is a diagram showing a detection range of the CMC sensor 3 according to the first embodiment of the present invention. FIG. 9 is a cross-sectional view of the door device using the metal sheet 15 according to the first embodiment of the present invention. FIG. 10 is a view showing an example of attachment of the CMC sensor 3 according to the first embodiment of the present invention.

  As shown in FIG. 2, the elevator door is composed of a car door 1 and a landing door 2 each composed of a pair of doors that are in contact with each other. The car door 1 is provided on the entrance / exit side of the car, and the landing door 2 is provided on the entrance / exit side of the landing on each floor.

  A pressure sensitive / proximity sensor 3 (hereinafter referred to as a CMC sensor 3) using a carbon microcoil (CMC) is affixed to the closed doors of the car door 1 as an object detection device over the entire surface. In this embodiment, as shown in the enlarged view portion in FIG. 1, three surfaces are attached in a U-shape with the door closed end surface as the center. The CMC sensor 3 has a pressure-sensitive sensor function and a proximity sensor function. The structure of the CMC sensor 3 will be described later.

  The car door 1 operates in the door opening / closing direction by driving of a driving device 4 (hereinafter referred to as a door motor 4). The landing door 2 is engaged with the car door 1 by the engaging device 5 and is opened and closed in conjunction with the opening and closing operation of the car door 1. The engaging device 5 is provided to engage the car door 1 and the landing door 2 when the car is landed on the floor.

  Here, the structure of the CMC sensor 3 will be described with reference to FIG. As shown in FIG. 3, the details of the CMC sensor 3 according to the present embodiment are described in Japanese Patent Application Laid-Open No. 2007-201641. A base material 6 made of a resin such as silicone rubber is provided with a coil-shaped inductance ( A carbon microcoil (CMC) 7 having an L) component, a capacitance (C) component, and a resistance (R) component is dispersedly formed.

  FIG. 4 shows changes in the spatial impedance between the CMC sensor 3 and the object due to the approach of the object (proximity sensor function), and changes in the output signal based on the L, C, and R components of the CMC sensor 3 due to the pressure from the object (pressure-sensitive sensor function) ). By referring to the output waveform obtained from the CMC sensor 3 as shown in FIG. 4, the object can be detected.

  For example, in FIG. 4, the CMC sensor 3 normally shows an output waveform 8, and an output waveform 9 is shown in proximity detection by the proximity sensor function or pressure detection by the pressure sensor function. In addition, when the object detection function is lost due to a failure such as disconnection, an output waveform 10 is shown. Details of the object detection will be described below with reference to FIGS.

  As shown in FIG. 5, when the object 11 comes into contact with the CMC sensor 3 attached to the door closing end surface during the door closing operation of the car door 1, pressure is applied to the CMC sensor 3 and the output signal from the CMC sensor 3 is displaced. Arise. As shown in FIG. 6, when there is an object 11 that approaches during the door closing operation, the impedance between the proximity object and the CMC sensor 3 changes. In this case, as described above, the normal output waveform 8 changes to the output waveform 9, and the door control unit 12 detects that the object 11 is in contact with or close to the door closing end surface.

  As described above, when the door control unit 12 detects a change in the output waveform due to the object 11 being sandwiched between the doors or coming into contact with the object 11, the door control unit 12 outputs a drive reversal signal to the door motor 4 to perform the door closing operation. Stop and switch to door open operation. Therefore, the object 11 is prevented from being caught or collided with the elevator door.

  As shown in FIG. 7, (a) is a center open type door opening / closing pattern, and (b) is a sliding open type door opening / closing pattern. Here, in the case of the center open type shown in (a), when the door closing ends of both doors approach when the door is closed, the CMC sensor 3 detects the opposite car door 1 as an adjacent object. Moreover, also in the case of the sliding open type shown in (b), since the car door 1 approaches the door stop pillar 13, the door stop pillar 13 is detected as an adjacent object. The same can be said for contact.

  Therefore, when the car door 1 reaches a predetermined position, the proximity sensor function of the CMC sensor 3 is prevented from acting so that the opposite car door 1 or the door-to-door pillar 13 is not erroneously detected as a foreign object. To.

  Specifically, the door control unit 12 measures and stores in advance an output waveform obtained from the CMC sensor 3 by the proximity of the car door 1 or the door-to-door pillar 13 that is opposed when the door is closed. Furthermore, the door motor 4 is provided with an encoder (not shown), and the door control unit 12 associates the door position detected by the encoder with the output waveform measured and stored in advance.

  That is, the door control unit 12 detects the proximity object based on the displacement from the output waveform corresponding to the position of the car door 1. Here, the displacement from the output waveform refers to, for example, disturbance of a normal output waveform. By doing in this way, it can prevent misdetecting the car door 1 or the door stop pillar 13 as a foreign material by the proximity sensor function of the CMC sensor 3. FIG.

  Then, after preventing the proximity sensor function from acting, the door control unit 12 causes the CMC sensor 3 to perform object detection using the pressure sensor function.

  Even after the CMC sensor 3 is switched from the proximity sensor function to the pressure sensor function, when the car door 1 is completely closed, the door control unit 12 is controlled by the pressure sensor function. The contact of the opposing car door 1 or the door-to-door pillar 8 is detected.

  Therefore, the output waveform from the CMC sensor 3 at the time of contact with the car doors 1 or the door-to-door pillars 13 is preliminarily applied to the door control unit 12 in the same manner as the above-described method for erroneous detection by such a pressure-sensitive sensor function. It is possible to prevent erroneous detection by measuring and storing and associating the position of the car door 1 detected by the encoder with its output waveform.

  In addition to this, when the CMC sensor 3 is attached to the car door 1 as shown in FIG. 8, the detection range 14 of the CMC sensor 3 detects passengers near the elevator entrance / exit and the landing door 2 as proximity objects. There is a possibility.

  Therefore, the proximity sensor function is narrowed to the detection range 16 by covering a part of the CMC sensor 3 with a metal sheet 15 as shown in FIG. That is, the range in which the metal sheet 15 is affixed to the side surface of the door closing end surface is set as a pressure sensor detection range 17 in which only the pressure sensor function functions.

  Thereby, it is possible to prevent erroneous detection of passengers and landing doors 2 in the vicinity of the elevator entrance / exit as proximity objects.

  In the present embodiment, the example in which the metal sheet 15 is used has been described. However, the present invention can be applied to the present embodiment as long as it is magnetically shielded using another metal magnetic material.

  In the first embodiment described above, the CMC sensor 3 is attached to the car door 1, but the CMC sensor may be attached to the landing door 2 in the same manner. Further, the same effect can be obtained even if the position of the car door 1 corresponding to the output waveform measured in advance is set as the position of the landing door 2.

  In the present embodiment, the CMC sensor 3 is pasted over the entire surface of the door closing end of the car door 1. For example, the CMC sensor 3 may be pasted on a part of the door closing end surface. Good.

  For example, FIG. 10 shows a sheet-like CMC sensor 3 that is U-shaped and attached to the door closing end surface. Thereby, the wiring of the input terminal side 18 and the output terminal side 19 of the CMC sensor 3 is gathered in one place, and the structure of the door device can be simplified.

  Further, the CMC sensor 3 can be used in various shapes without being limited to the letter U.

(Second Embodiment)
Next, a second embodiment will be described.

  FIG. 11 is a diagram showing door position detection by the door closing position detection sensor 20 according to the second embodiment of the present invention. The door closing position detection sensor 20 is provided in a header 21 provided at the upper part of the car door 1 entrance.

  By attaching the door closing position detection sensor 20, the door position is confirmed during the door closing operation, and the CMC sensor 3 is switched from the proximity sensor function to the pressure sensor function when the door reaches a predetermined position. . Other configurations are the same as those in the first embodiment.

  The door closing position detection sensor 20 is provided with a light emitting portion, which emits light in a substantially vertical direction and detects the position of the car door 1 based on the amount of reflected light. The dotted line portion shown in FIG. 11 corresponds to the optical axis.

  The door control unit 12 switches the CMC sensor 3 from the proximity sensor function to the pressure-sensitive sensor function when detecting that the door closing side tip of the door during the door closing operation touches the optical axis. After the door closing operation is completed, when the door control unit 12 detects that the door starts to open and the door has resolved the interference with the optical axis, the CMC sensor 3 is switched to the proximity sensor function again.

  That is, the CMC sensor 3 functions as a pressure-sensitive sensor while the optical axis is blocked, and the proximity sensor function otherwise.

  As described above, it is possible to switch the CMC sensor 3 from the proximity sensor function to the pressure-sensitive sensor function with a simple structure, and to prevent erroneous detection of an opposing door or the like as an obstacle object when the door is closed.

Here, the door closing position detection sensor 20 is a reflection type sensor, but a light receiving part that forms a pair with the light emitting part may be provided.

(Third embodiment)
Next, a third embodiment will be described.

  FIG. 12 is a perspective view of a door device according to the third embodiment of the present invention. FIG. 13 is a detailed view of the elevator door device when the door is closed for explaining the operation according to the third embodiment of the present invention. (A) is the figure which showed the center open type door opening and closing, (b) is the figure which showed the sliding open type door opening and closing. FIG. 14 is a detailed view of the door device when the stopper 22 according to the third embodiment of the present invention is used. (A) is the figure which showed the state at the time of door closing in a center open type, (b) is the figure which showed the state at the time of door closing in a sliding open type.

  Also in this embodiment, the door control unit 12 switches from the proximity sensor function to the pressure-sensitive sensor function by the above-described method so as not to erroneously detect a door or the like facing the CMC sensor 3 as a foreign object during the door closing operation. It is configured.

  The third embodiment prevents the CMC sensor 3 from erroneously detecting the opposite car door 1 or the door-to-door pillar 13 as a door closing obstacle foreign matter also by the pressure sensor function.

  Therefore, as shown in FIG. 12, the stopper 22 is provided in the upper part of the door closing end surface. Other configurations are the same as those in the first embodiment.

  Usually, when the door is closed, as shown in FIG. 13, the car doors 1 and the car doors 1 and the door stopper pillars 13 are in contact with each other.

  Here, by providing the stopper 22 on the door closing end surface of the car door 1, as shown in FIG. 14, a slight gap is generated between the car doors 1 or between the car doors 1 and the door-holding pillars 13, and pressure sensitive. It is possible to prevent erroneous detection by the sensor function.

  The stopper 22 can be provided without blocking the proximity sensor function. At this time, the door position and the output waveform from the CMC sensor 3 are associated with each other so that the proximity sensor function does not act so that the proximity sensor is not erroneously detected. In this way, object detection can be performed even for a slight gap between the car doors 1 generated by the stopper 22.

  Here, the stopper 22 is provided on the upper part of the door closing end surface of the car door 1, but the present invention is not limited to this.

(Fourth embodiment)
Next, a fourth embodiment will be described.

  FIG. 15 shows a state in which the sheet-like CMC sensor 3 provided on the door closing end surface of the car door 1 is covered with a resin plate 23. Other configurations are the same as those in the first embodiment.

  The CMC sensor 3 formed of carbon microcoil (CMC) is black because it contains carbon. Therefore, it is possible to attach the CMC sensor 3 to the elevator door without damaging the design surface by covering the CMC sensor 3 with the resin plate 23.

  If it is an insulator such as a resin sheet, even if it is attached to the CMC sensor 3, the proximity sensor function is not affected. Furthermore, the pressure sensor function is not affected.

  In this embodiment, the metal sheet 15 described in the first embodiment can be used in combination.

DESCRIPTION OF SYMBOLS 1 ... Car door 2 ... Landing door 3 ... CMC sensor 4 ... Drive apparatus 5 ... Engagement apparatus 6 ... Base material 7 ... Carbon microcoil 8 ... Output waveform (normal time)
9 ... Output waveform (proximity / pressure sensitive)
10 ... Output waveform (at the time of failure)
DESCRIPTION OF SYMBOLS 11 ... Object 12 ... Door control part 13 ... Door-to-door pillar 14 ... Proximity sensor detection range (normal time)
15 ... metal sheet 16 ... proximity sensor detection range (when metal sheet is attached)
17 ... Pressure-sensitive sensor detection range 18 ... Input side terminal 19 ... Output side terminal 20 ... Door closing position detection sensor 21 ... Header 22 ... Stopper 23 ... Resin plate

Claims (5)

An elevator car door driven by a drive,
A landing door that is engaged with the car door and opens and closes together with the opening and closing operation of the car door;
An object detection device provided on at least one door closed end surface of the car door and the landing door and capable of pressure-sensitive detection and proximity detection;
When the output signal from the object detection device is detected by the predetermined position during the door closing operation, the door closing operation of the car door is stopped, reversed in the door opening direction, and the object detection is performed by the predetermined position. A door control unit that switches the object detection device from a proximity sensor function to a pressure-sensitive sensor function when the car door reaches the predetermined position without detecting an output signal from the device;
An elevator door device comprising: The drive device detects the position of the car door by an encoder provided in the drive device,
The said door control part matches the said car door position detected with the said encoder, and the output waveform obtained from the said object detection apparatus, and performs an object detection by the displacement of the said output waveform. The elevator door apparatus as described in. The door controller is
The position of the car door corresponding to the change of the output waveform obtained from the object detection device is stored, and the object detection means is changed from the proximity sensor function to the pressure sensor function when the car door reaches the change position of the output waveform. The elevator door device according to claim 2, wherein the elevator door device is switched.   The elevator door device according to claim 2, wherein a stopper is provided on at least one of the opposing car doors or the wall body.   The elevator door device according to claim 2, wherein an object detection range by a proximity sensor function is limited by covering a part of the object detection device with a metal sheet.

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