JP2005170602A - Elevator door equipment - Google Patents

Abstract

It is an object of the present invention to provide an elevator door device that can accurately detect contact of a human body with a door even if the human body contact area is small, regardless of changes in humidity.
The present invention detects whether a human body is in contact with a door (6A, 6B) that is electrically insulated from ground potential, and detects a change in potential between the door (6A, 6B) and ground. This is configured to be performed by the potential detection means 15.
According to the above configuration, since the discharge of static electricity is detected when the human body comes into contact with the door, it is possible to accurately detect the contact of the human body with the door even if the human body contact area is slightly smaller than the door area. The discharge of static electricity is determined by the charging voltage of the door, so human body detection is not affected by changes in humidity.
[Selection] Figure 1

Description

  The present invention relates to an elevator door device, and more particularly to an elevator door device that can prevent a human body from being caught when the door is opened and closed.

  Conventionally, as an elevator door device capable of preventing a human body from being pinched when the door is opened and closed, for example, an invention described in Patent Document 1 has already been proposed.

JP 2002-370884 A

  The invention described in Patent Document 1 detects the contact of the human body with the elevator door based on a change in capacitance, thereby alerting the passenger and controlling the opening and closing of the door.

  However, since the capacitance easily changes depending on the humidity, there is a problem that it is difficult to accurately detect the contact of the human body with the door regardless of the humidity change.

  In addition, if the entire door surface is used as the detection surface, the non-contact area of the human body is extremely large compared to the contact area of the human body. There is a problem that cannot be detected properly.

  An object of the present invention is to provide an elevator door device that can accurately detect contact of a human body with a door regardless of a change in humidity, even if the human body contact area is slight.

  In order to achieve the above object, according to the present invention, the presence or absence of contact of a human body with a door that is electrically insulated from the ground potential is detected by a potential detecting means for detecting a change in potential between the door and the ground. It was configured as follows.

  According to the above configuration, when the human body comes into contact with the door, it detects that the static electricity is discharged and the potential is lowered. Since discharge occurs, it is possible to accurately detect contact of the human body with the door. In addition, since the electrostatic discharge is determined by the amount of charge on the door, it is not affected by changes in humidity.

  As described above, according to the present invention, it is possible to obtain an elevator door device that can accurately detect contact of a human body with a door regardless of a change in humidity, even if the human body contact area is slight.

  A first embodiment of an elevator door device according to the present invention will be described below with reference to FIGS. The elevator door device includes a landing door device and a car door device. Since the detection of human contact is the same for both the landing door device and the car door device, the present embodiment will be described for the car door device.

  In the car 1, a car room is formed by a car side plate 3 standing on the periphery of the car floor 2 and a ceiling plate 4 provided on the top of the car side plate 3. The car doorway 5 is opened and closed by car doors 6A and 6B.

  The upper parts of these car doors 6A and 6B are suspended from a door hanger 8 via an insulating means 7 and guided so that they can be opened and closed left and right. The lower ends of the car doors 6A and 6B are engaged with a sill 10 provided on the edge of the car floor 2 via an insulating means 9 and guided so as to be opened and closed left and right. In this way, the car doors 6A and 6B are electrically insulated from the ground potential by supporting the car doors 6A and 6B on the car 1 via the insulating means 7 and 9.

  Further, friction bodies 11 and 12 constituting a first electrostatic charging means are provided between the car room and the car doors 6A and 6B. The friction body 11 is supported by the car doors 6A and 6B, and is electrically connected to the car doors 6A and 6B. The friction body 12 is supported by a pillar 13 that is a strength member of a cage. The car doors 6A and 6B are charged with static electricity generated between the friction bodies 11 and 12 when the car doors 6A and 6B are opened and closed. In addition, if the friction bodies 11 and 12 are a position which does not prevent a passenger's getting on and off and opening / closing of a door at the time of a door opening, the installation position will not be specifically limited.

  In addition, the car door device includes static electricity detecting means 14 for detecting the static electricity of the car doors 6A and 6B and detecting the presence or absence of contact with the human body door.

  The static electricity detection means 14 basically includes a potential detection means 15 for detecting a change in the potential of the car doors 6A and 6B, and the presence or absence of contact with the human body door based on the potential detected by the potential detection means 15. Judgment means 16 for judging, and control means 17 for giving commands to various places according to the judgment result by the judgment means 16 are provided. A part of the signal of the control means 17 is input to the car control means 18 for controlling the operation of the car 1, and the opening / closing of the car doors 6A and 6B is controlled by a command from the car control means 18. The door control means 19 and the guide means 20 for alerting the user operate.

  In the above-described configuration, the car doors 6A and 6B are charged with static electricity having a voltage Vd between the friction bodies 11 and 12 and the ground. In this state, immediately before the car 1 is landed and the car doors 6A and 6B are opened, the potential detection means 15 detects static electricity in the car doors 6A and 6B. The detected voltage Vd is determined by the determining means 16 to determine whether it is within a preset voltage range. If the measured voltage Vd is within the set voltage range, it is determined that there is no human contact and the control means. 17 to output. The control means 17 outputs to the car control means 18 that there is no human body contact. The car control means 18 sends a signal for instructing the door opening to the door control means 19 to open the car doors 6A and 6B of the car 1.

  If the passenger touches the car doors 6A and 6B immediately before opening the car doors 6A and 6B, the static electricity of the voltage Vd is discharged and becomes substantially the same as the ground potential. The decrease in the voltage Vd is detected by the potential detection means 15, and the measured value is input to the determination means 16 to confirm that it is out of the preset voltage range, and it is determined that the human body has touched. The fact that the human body has been touched is transmitted to the car control means 18 via the control means 17, and a signal is transmitted from the car control means 18 to the guide means 20 to notify the passengers of leaving the door. At the same time, a signal for waiting for the door to open is transmitted to the door control means 19, and the opening of the car doors 6A and 6B of the car 1 is suspended. The door control means 19 holds the door open for a certain time and then opens the door.

  As described above, since the discharge of static electricity is detected when the passenger touches the car doors 6A and 6B, if the static electricity holding a dischargeable voltage is charged on the car doors 6A and 6B, the humidity changes. Thus, the detection accuracy does not change, and the human body can be accurately detected.

  Furthermore, even if the contact area of the human body to the car doors 6A and 6B is small compared to the door area, electrostatic discharge occurs due to the contact. Therefore, it is possible to accurately detect the contact of the human body with the door by detecting the discharge. it can.

  By the way, the above description is the detection of the human body immediately before the car 1 is landed and the car doors 6A and 6B are opened. However, the passenger may touch the car doors 6A and 6B to discharge static electricity before the car 1 reaches the floor, and the static electricity of the specified voltage may not be charged immediately before the car doors 6A and 6B are opened. In such a case, the human body cannot be detected.

  A second embodiment of the elevator door device according to the present invention shown in FIG. 4 has been made to eliminate such inconvenience. In FIG. 4, the same reference numerals as those in FIG.

  4 is different from FIG. 1 in that a charging static electricity control means 21 is provided. This electrostatic charge control means 21 is provided in order to always keep the electrostatic voltage charged in the car doors 6A and 6B within a specified value range. The doors 6A and 6B are provided with second electrostatic charging means 22 for charging static electricity and discharge means 23 for discharging static electricity of the car doors 6A and 6B.

  Normally, the car doors 6A and 6B are charged with static electricity of a specified voltage Vd by the frictional action of the friction bodies 11 and 12 as the first electrostatic charging means by the closing operation of the car doors 6A and 6B. In this state, when the passenger 1 touches the car doors 6A and 6B and discharges static electricity while the car 1 is moving up and down, the potential detecting means 15 detects the decrease in the voltage Vd and outputs it to the judging means 16. The determination means 16 outputs that the human body has been touched to the control means 17. At this time, the determination means 16 simultaneously receives a signal from the car control means 18 that the car 1 is moving up and down. As described above, the control means 17 transmits a signal to the electrostatic charge control means 21 on the condition that there is a human body contact and the car 1 is moving up and down. The electrostatic charge control means 21 receiving the signal from the control means 17 gives an instruction to charge the doors 6A and 6B with static electricity until the second electrostatic charge means 22 reaches a specified voltage Vd. The voltage of the car doors 6A and 6B charged by the second electrostatic charging means 22 is sent from the potential detecting means 15 to the judging means 16, and when it is judged by the judging means 16 that the voltage does not reach the specified voltage Vd. Continuously sends a signal to the electrostatic charge control means 21 via the control means 17 to continue the charging operation by the second electrostatic charge means 22. When it is determined by the determination means that the specified voltage Vd has been reached, a signal for stopping the second electrostatic charging means 22 is sent to the electrostatic charge control means 21 via the control means 17.

  As described above, since the car doors 6A and 6B are always charged with static electricity of the specified voltage Vd even when there is a human body contact with the car doors 6A and 6B while the car 1 is moving up and down, the doors Contact to the human door just before opening does not become undetectable.

  When the electrostatic charging of the car doors 6A and 6B by the friction bodies 11 and 12 as the first electrostatic charging means and the second electrostatic charging means 22 exceeds the specified voltage Vd, the passenger takes the car door 6A. , 6B is uncomfortable because of the high discharge voltage. In order to prevent this from occurring, a discharge command is given to the static electricity control means 21 via the control means 17 when the static electricity detected by the potential detection means 15 and the determination means 16 exceeds the specified voltage Vd. Upon receiving the discharge command, the static electricity control means 21 operates the discharge means 23 to discharge excess static electricity, and controls the charging of the static electricity so that it becomes the specified voltage Vd. Here, when the static electricity control means 21 shorts between the car doors 6A and 6B and the ground, for example, most of the static electricity is discharged. Therefore, by adjusting the gap between the car doors 6A and 6B and the ground. It is desirable to be able to control the discharge amount.

  By the way, although each above embodiment demonstrated car door 6A, 6B as an elevator door apparatus, it cannot be overemphasized that it can apply also to a landing door.

The block diagram which shows 1st Embodiment of the elevator door apparatus by this invention. The front view which shows the car door vicinity of the passenger car used for FIG. The right view of FIG. The block diagram which shows 2nd Embodiment of the elevator door apparatus by this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Car, 6A, 6B ... Car door, 7, 9 ... Insulating means, 11, 12 ... Friction body (first electrostatic charging means), 14 ... Static electricity detecting means, 15 ... Potential detecting means, 16 ... Judging means , 17 ... control means 17, 18 ... car control means, 19 ... door control means, 20 ... guide means, 21 ... charging static electricity control means, 22 ... second electrostatic charging means, 23 ... discharge means.

Claims (10)

  An elevator door device comprising: insulating means for electrically insulating a door from a ground potential; and static electricity detecting means for detecting whether or not the door is touched by detecting static electricity of the door. An elevator door device characterized by comprising a potential detecting means for detecting a change in the static potential of the door.   The elevator door device according to claim 1, wherein the potential detection means is means for detecting discharge of static electricity from the door.   The elevator door device according to claim 1, wherein the potential detecting means is means for detecting a potential difference between the door and ground.   An elevator door device comprising: insulating means for electrically insulating a door from a ground potential; and static electricity detecting means for detecting whether or not the door is touched by detecting static electricity of the door. Characterized in that it comprises a potential detection means for detecting a change in the electrostatic potential of the door and a judgment means for judging the presence or absence of contact of the human body with the potential detected by the potential detection means. Elevator door device.   An elevator door device comprising: insulating means for electrically insulating a door from a ground potential; and static electricity detecting means for detecting whether or not the door is touched by detecting static electricity of the door. Comprises a potential detecting means for detecting a change in the static potential of the door, and a judging means for judging the presence or absence of contact with the human body door based on the potential detected by the potential detecting means, and the door An elevator door device characterized in that it is provided with electrostatic charging means for charging static electricity and charging electrostatic control means for controlling the amount of static electricity charged to the door.   6. The elevator door device according to claim 5, wherein the electrostatic charging means for charging the door with static electricity is configured to charge the door with static electricity by opening and closing the door.   6. The elevator door device according to claim 5, wherein the electrostatic charging means for charging the door with static electricity is configured to charge the door with static electricity according to a command from the charging static electricity control means.   The electrostatic charging means for charging the door with static electricity has a first electrostatic charging means and a second electrostatic charging means, and the first electrostatic charging means charges the static electricity by opening and closing the door. 6. The elevator door device according to claim 5, wherein the second electrostatic charging means is configured to charge static electricity based on a command from the charging static electricity control means.   An elevator door device comprising: insulating means for electrically insulating a door from a ground potential; and static electricity detecting means for detecting whether or not the door is touched by detecting static electricity of the door. Comprising: a potential detecting means for detecting a change in static electricity of the door potential; and a judging means for judging whether or not the human body is in contact with the door based on the potential detected by the potential detecting means. A static charging means for charging static electricity, a discharging means for discharging static electricity charged to the door, and a static electricity amount charged to the door by controlling the electrostatic charging means and the discharging means within a specified range. An elevator door device characterized in that it is provided with electrostatic charge control means for holding it. A potential for detecting a potential difference of static electricity between the door and the ground in an elevator door device comprising an insulating means for electrically insulating the door and the ground potential and a means for determining whether or not a human body is in contact with the door. The detection means, the judgment means for comparing the potential difference detected by the potential detection means with a preset threshold value, the control means for giving a command to each means based on the judgment result by the judgment means, and the amount of static electricity charged to the door Charging static electricity control means for holding in the range, electrostatic charging means for charging the door with static electricity, car control means for controlling the operation of the car based on a command from the control means, and the car control means Door control means for controlling the opening and closing of the door according to a command from the vehicle, and guide means for calling attention to the user according to a command from the car control means. Elevator door apparatus according to claim.

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