JP2008056435A - Safety device for elevator doorway - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a safety device for an elevator doorway capable reducing impact applied to a photoelectric sensor, and capable of surely detecting a passenger. <P>SOLUTION: The safety device for the elevator doorway is provided with a supporting means 11 oscillatably supporting the photoelectric sensor 5 by a fixing member 4a forming an outer shell of a door opening and closing device 4 on an upper part of a doorway of a car 1, a driving device 7 which is a driving source of oscillation of the photoelectric sensor 5, and a control means for controlling an electric motor of the driving device 7 so that a detection range 6 of the photoelectric sensor 5 always includes a region from a door end 9 to a door close end 10. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an elevator entrance / exit safety device that detects a passenger passing through an elevator entrance using a photoelectric sensor provided at an upper portion of the elevator entrance.

As a safety device for an elevator doorway, there is a conventional technique disclosed in Patent Document 1. This elevator entrance / exit safety device has an infrared sensor which is a photoelectric sensor. This infrared sensor is attached to the door hanger through an attachment arm. The detection range of this infrared sensor is formed almost directly from the mounting arm.
JP-A-6-191775 (paragraph numbers 0003 to 0007, FIG. 10)

  In the prior art described above, since the infrared sensor is attached to the door hanger via the attachment arm, the infrared sensor moves together with the car door. For this reason, there is a concern that the infrared sensor will be subjected to an impact when the car door is opened and closed, causing failure. In addition, since the detection range of the infrared sensor is formed directly below the mounting arm, there is a range where passengers cannot be detected at the entrance / exit of the elevator, and there is a concern that the passengers may come into contact with the car door.

  The present invention has been made from the actual situation in the prior art as described above, and an object thereof is to provide an elevator entrance / exit safety device that can reduce the impact applied to the photoelectric sensor and reliably detect passengers.

  In order to achieve this object, an elevator doorway safety device having a photoelectric sensor provided at an upper part of an elevator doorway and capable of detecting a passenger passing below is capable of swinging to a fixing member at an upper part of a car doorway. The supporting means for supporting the photoelectric sensor, the driving device as a driving source for swinging the photoelectric sensor, and the driving device so that the detection range of the photoelectric sensor always includes a region from the door end to the door closing end. Control means for controlling is provided.

  In the present invention configured as described above, since the photoelectric sensor is supported by the fixing member at the upper part of the car doorway that does not move with the car door, it is possible to reduce the impact received by the photoelectric sensor when the car door is opened and closed. This can prevent a failure of the photoelectric sensor. Further, since the photoelectric sensor is swung so that the detection range of the photoelectric sensor always includes the region from the door end to the door closing end, the passenger can be detected reliably.

  Further, the present invention is characterized in that in the above invention, the driving device has an electric motor.

  Further, the present invention is characterized in that, in the above invention, a detection means for detecting a door position is provided, and the control means controls the electric motor in accordance with the door position detected by the detection means.

  Further, the present invention is characterized in that, in the above invention, the photoelectric sensor is provided in the vicinity of a door closing end.

  As described above, according to the present invention, since the impact received by the photoelectric sensor can be reduced as compared with the conventional case, failure of the photoelectric sensor can be prevented. Moreover, since a passenger can be detected reliably, it can prevent a passenger from contacting a car door.

  BEST MODE FOR CARRYING OUT THE INVENTION The best mode for carrying out an elevator doorway safety device according to the present invention will be described below with reference to the drawings.

  FIG. 1 is a diagram showing an outline of an embodiment of a safety device for an elevator doorway according to the present invention, and FIG. 2 is a block diagram showing a flow of processing performed by a control device when controlling the electric motor shown in FIG. 3 is a plan view showing the detection range of the photoelectric sensor when the car door is fully opened, and FIG. 4 is a plan view showing an example of the detection range of the photoelectric sensor while the car door is closed.

  As shown in FIG. 1, a car 1 has a single-open car door 2 whose doorway is opened and closed in conjunction with a first car door 2 a and a second car door 2 b, and an upper end of the car door 2. A door hanger 3 that is fixed and a door motor (not shown) that serves as a drive source for the car door 2 are provided, and a door opening and closing device 4 that opens and closes the car door 2 is provided.

  This embodiment is provided at the upper part of the elevator entrance / exit, the photoelectric sensor 5 for detecting passengers passing below, and the fixing member 4a fixed to the upper part of the entrance / exit of the car 1 and forming the outer shell of the door opening / closing device 4. A support means 11 for supporting the photoelectric sensor 5 so as to be able to swing, a drive device 7 having an electric motor as a drive source for swinging the photoelectric sensor 5, and a rotation of the door motor converted into a pulse signal and output (not shown) A rotation sensor and a control device 8 that controls the electric motor according to the door position calculated from the pulse signal from the rotation sensor are provided.

  The control device 8 calculates the door position of the car door 2 based on the pulse signal from the rotation sensor, and calculates the output value of the control signal given to the electric motor of the drive device 7 from the door position. . The output value of the control signal is calculated so that the detection range 6 of the photoelectric sensor 5 always includes a region from the door end 9 of the car door 2 to the door closing end 10 of the car door 2. The door closing end 10 is the position of the door end 9 when the car door 2 is fully closed, and the photoelectric sensor 5 described above is provided near the door closing end 10.

  That is, in this embodiment, the detection means which detects the door position of the car door 2 is comprised from the rotation sensor and the control apparatus 8 which calculates a door position. The control means for controlling the electric motor of the driving device 7 so that the detection range 6 of the photoelectric sensor 5 always includes a region from the door end 9 of the car door 2 to the door closing end 10 of the car door 2 is an electric motor. And a control device 8 for calculating the output value of the control signal to be supplied to and outputting the control signal.

  Next, the operation of this embodiment will be described. In the present embodiment configured as described above, as shown in FIG. 2, when the car door 2 is opened and closed, the rotation of the door motor of the door opening and closing device 4 is converted into a pulse signal by the rotation sensor and output to the control device 8 (S1). ). Along with this, the control device 8 calculates the door position of the car door 2 based on the pulse signal (S2), and based on the door position, the detection range 6 of the photoelectric sensor 5 is the door end of the car door 2. The output value of the control signal given to the electric motor of the driving device 7 is calculated so as to always include the region from 9 to the door closed end 10 of the car door 2 (S3), and the control signal of the output value is output to the electric motor (S4).

  By operating the present embodiment as described above, the detection range 6 of the photoelectric sensor 5 is set so that the door of the car door 2 is closed from the door end 9 of the car door 2 when the car door 2 is fully opened as shown in FIG. The direction is controlled so that the detection range 6a including the region up to the end 10 is obtained. In addition, as shown in FIG. 4, the detection range 6 of the photoelectric sensor 5 includes a region from the door end 9 of the car door 2 to the door closed end 10 of the car door 2 when the car door 2 is being closed. The range 6b is controlled.

  In the present embodiment configured as described above, as described above, the photoelectric sensor 5 is supported by the support means 11 on the fixing member 4a at the upper part of the entrance / exit of the car 1 that does not move with the car door 2. The impact received by the photoelectric sensor 5 when the car door 2 is opened / closed can be reduced, thereby preventing the photoelectric sensor 5 from being damaged. In addition, since the photoelectric sensor 5 is swung so that the detection range 6 of the photoelectric sensor 5 always includes the region from the door end 9 to the door closing end 10, the passenger can be detected reliably, and the passenger can thereby detect the car door 2. Can be prevented from touching.

  In addition, although this embodiment is an example applied to the elevator provided with the single-opening type car door 2, the elevator which applies this invention is not restricted to this, It applies to the elevator provided with a double-opening type car door. May be. In this case, two photoelectric sensors are provided above the door closing end of the double-opening car door, and each photoelectric sensor is swung so as to always include a region from the door closing end to the door end of each car door. Configure as follows. Thereby, the effect similar to this embodiment mentioned above can be acquired also with the elevator provided with the double-opening type car door.

  In addition, the present embodiment is an example in which the photoelectric sensor 5 is configured to be swingably supported by the fixing member 4a that forms the outer shell of the door opening and closing device 4, but the present invention is not limited thereto, and the photoelectric sensor 5 is not limited thereto. Even if it is configured to be supported by a fixing member other than the fixing member 4a of the door opening and closing device 4 so as to be able to swing, the same effect as that of the above-described embodiment can be obtained.

  Furthermore, in this embodiment, although it is the example comprised so that the door position of the car door 2 might be detected using the rotation sensor which converts rotation of a door motor into a pulse signal, it is not restricted to this, A door switch You may comprise so that the door position of the car door 2 may be detected using.

It is a figure which shows the outline of one Embodiment of the safety device of the elevator doorway which concerns on this invention. It is a block diagram which shows the flow of the process which a control apparatus performs when controlling the electric motor shown in FIG. It is a top view which shows the detection range of the photoelectric sensor at the time of fully open of a car door. It is a top view which shows an example of the detection range of the photoelectric sensor in the middle of a car door closing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Car 2 Car door 2a 1st car door 2b 2nd car door 3 Door hanger 4 Door opening / closing device 4a Fixing member 5 Photoelectric sensor 6 Detection range 6a Detection range 6b Detection range 7 Drive device 8 Control device 9 Door end 10 Door Closed end 11 Support means

Claims (4)

In the elevator entrance / exit safety device having a photoelectric sensor provided at the upper part of the elevator entrance / exit and capable of detecting passengers passing below,
Support means for supporting the photoelectric sensor so as to be able to swing on a fixed member at the upper part of the car doorway, a driving device as a driving source for swinging the photoelectric sensor, and a detection range of the photoelectric sensor from the door end to the door An elevator entrance / exit safety device comprising control means for controlling the drive device so as to always include a region up to a closed end. In the invention of claim 1,
The drive device has an electric motor, and is an elevator entrance / exit safety device. In the invention of claim 2,
A detecting means for detecting the door position;
The safety device for an elevator entrance and exit, wherein the control means controls the electric motor in accordance with a door position detected by the detection means. In invention of Claims 1-3,
An elevator entrance / exit safety device characterized in that the photoelectric sensor is provided near the closed end of the door.

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