JP2013256344A

JP2013256344A - Door control device for elevator

Info

Publication number: JP2013256344A
Application number: JP2012132141A
Authority: JP
Inventors: Kazumichi Sakai; 和道坂井
Original assignee: Hitachi Building Systems Co Ltd; 株式会社日立ビルシステム
Priority date: 2012-06-11
Filing date: 2012-06-11
Publication date: 2013-12-26

Abstract

PROBLEM TO BE SOLVED: To provide a door control device for an elevator, capable of precisely detecting a failure of a foreign matter detection device as much as possible, and capable of taking early measures against the occurrence of the failure without requiring on-site diagnosis by a maintenance person.SOLUTION: A door driving device 4 and a projection 6 in a door control device for an elevator operate as a forcible operation means for forcibly operating a foreign matter detection device 3 at timing (during elevator traveling or the like) without requiring foreign matter detection in the foreign matter detection device 3. When the door driving device 4 receives a command for increasing door closure force from a failure determination means 5 to execute door closure, the foreign matter detection at the foreign matter detection device 3 (projection 6 is brought into contact with a pressure sensor 7) is forcibly performed. On the basis of the detection signal in which the foreign matter is detected at the foreign matter detection device 3 by the forcible operation means, when the foreign matter detection is not continuously performed a predetermined number of times, the failure determination means 5 determines an OFF-failure of the foreign matter detection device 3 in situations in which a contact of the pressure sensor 7 is left opened and detection is not performed even when the pressure sensor 7 is brought into contact with foreign matter at all times.

Description

The present invention relates to an elevator door control device having a function of preventing traveling of a car in a state where foreign objects are sandwiched between doors of the elevator car.

2. Description of the Related Art Conventionally, as this type of elevator door control device, a configuration using a safety shoe, an optical sensor, an ultrasonic sensor, or the like to detect a car being caught in a door or a passenger entering / exiting is known. .

However, in these devices, it is difficult to reliably detect a state in which a foreign object such as a thin string, rope, cord or the like is sandwiched, so that, for example, one of the passengers accompanied by a dog or the like connected by a string When the other side is separated into the car at the landing and the car door is closed, the car travels with the string still sandwiched between the car doors, causing a serious accident. There is a risk of inviting.

In order to prevent such a situation, foreign matter detection using a pressure sensor on the door contact surface of the elevator car door as a device that can reliably detect the state of foreign matter such as thin strings, ropes, cords, etc. Techniques for providing devices have been proposed. However, even in such a device, when an operation failure occurs in the foreign object detection device, there is a problem that the door of the car is always reversed and cannot be closed.

Therefore, a well-known technique for detecting an operation failure of such a foreign object detection device has also been proposed. As an example, the “elevator door” can detect a failure of the foreign material detection device at an early stage and can quickly take measures against the failure. Safety device "(see Patent Document 1).

JP 2010-89843 A

In the technique of Patent Document 1 described above, the foreign object detection device detects a foreign object when the door is closed and repeats the reverse door opening operation of the car door a predetermined number of times, or the foreign object detection device detects the foreign object when the door is closed. If the open state of the car door continues for a predetermined time or longer, the foreign object detection device is temporarily disabled, the door is closed at a low speed by the low-speed door closing means, and the low-speed door closing by the low-speed door closing means is continuously repeated a predetermined number of times or more. And a function for determining the foreign object detection device as a failure by the failure determination means.

However, according to the technique of Patent Document 1, the failure of the foreign object detection device in a situation where the contact of the pressure sensor of the foreign material detection device remains closed and the pressure sensor constantly detects contact with the foreign material. Since the foreign matter detection device is judged to be abnormal, the contact of the pressure sensor of the foreign matter detection device remains open, and the foreign matter detection device is in a state where it is not detected even if the pressure sensor constantly contacts the foreign matter. The OFF failure has a drawback that it cannot be determined that the foreign object detection device is abnormal.

In this way, when the foreign matter detection device has an OFF failure, the door will not be open and the elevator will not be disabled, but the foreign matter detection function will not work. If there is no other device that can detect the presence of foreign objects such as ropes, cords, etc., the car will run, and as in the case described above, it may cause a serious accident, so the safety is insufficient. It has become a thing. Incidentally, in an existing elevator, when an OFF failure of the foreign object detection device occurs, the actual situation is that there is no way other than a maintenance inspector to manually detect the foreign object at the time of maintenance and inspection to detect the foreign object.

The present invention has been made to solve such problems, and its technical problem is that it can detect the failure of the foreign object detection device as accurately as possible and does not require on-site diagnosis by maintenance personnel. An object of the present invention is to provide an elevator door control device that can take early measures when a failure occurs.

In order to solve the above technical problem, the basic configuration of the present invention is provided at a front end of the door of one side of the elevator car door and detects a state in which foreign matter is caught in the door when the door is closed. For an elevator having a foreign object detection device equipped with a pressure sensor and having a function of preventing the car from traveling in a state where the foreign object is sandwiched between the doors based on a detection signal detected by the foreign object detection device. A door control device based on forcible operation means for forcibly operating the foreign object detection device at a timing when foreign object detection by the foreign object detection device is unnecessary, and detection signals detected by the foreign object detection device by the forcible operation means If the foreign object is not continuously detected a predetermined number of times, the contact of the pressure sensor remains open and the pressure sensor is always detected even if it contacts the foreign object. A failure determination means for determining a OFF failure of the foreign matter detecting apparatus had circumstances comprising the.

According to the elevator door control device of the present invention, the forcible operation means forcibly operates the foreign object detection device at a timing when the foreign object detection by the foreign object detection device is unnecessary, and the failure determination means uses the foreign object detection device by the forcible operation means. If the foreign object detection is not performed continuously for a predetermined number of times, the foreign object detection device has a function to determine the OFF failure, so the failure of the foreign object detection device can be detected as accurately as possible. Therefore, it is possible to take an early countermeasure when a failure occurs.

BRIEF DESCRIPTION OF THE DRAWINGS It is the external view which showed the schematic structure of the elevator containing the door control apparatus for elevators which concerns on Example 1 of this invention including the enlarged view of a partial foreign material detection apparatus from the front direction. It is the flowchart which showed the operation | movement process which concerns on the door control apparatus for elevators shown in FIG. It is the block diagram which showed schematic structure of the monitoring system containing the door control apparatus for elevators concerning Example 2 of this invention.

The elevator door control device of the present invention will be described below in detail with reference to the drawings, with some examples.

FIG. 1 is an external view illustrating a schematic configuration of an elevator including an elevator door control device according to a first embodiment of the present invention, including an enlarged view of a part of the foreign object detection device 3 from the front direction. However, the foreign object detection device 3 shown as an enlarged view in FIG. 1 shows both the extending direction and the cross-sectional direction perpendicular thereto. In this elevator door control device, a door driving device 4 that opens and closes a door 2 provided in an elevator car 1 and uses it as a car doorway is installed on the ceiling of the car 1. In addition, one foreign matter detecting device 3 incorporating a pressure sensor 7 provided at a door contact side tip of one side of the door 2 and a protrusion 6 provided at the door contact side tip of the other side of the door 2 are provided. When the foreign object such as a string or a rope is sandwiched between them, the other foreign object detection apparatus 3 provided with the pressure sensor 7 operates to issue a detection signal that detects the state in which the foreign object is caught. However, the protrusion 6 here acts only when determining the failure of the foreign object detection device 3 by forced foreign object detection with respect to the foreign material detection device 3 described later. Further, when the control means (not shown) receives the detection signal as a result of detecting the foreign object, the elevator 1 is stopped and the door 2 is reversed in the opening direction, whereby the car 1 in a state where the foreign object is sandwiched between the doors 2. Stop running to prevent it. In addition, after the door 2 is closed, the failure determination means 5 connected to the door drive device 4 and the foreign object detection device 3 instructs the door drive device 4 to forcibly detect the foreign object with the foreign object detection device 3. The failure of the foreign object detection device 3 is determined based on the detection signal.

In detail, the door drive device 4 and the protrusion 6 described above serve as a forcible operation means for forcibly operating the foreign object detection device 3 at a timing when the foreign object detection device 3 is not required to detect the foreign object during the traveling of the elevator. . Specifically, the foreign object detection is forcibly performed by the foreign object detection device 3 when the door driving device 4 receives the instruction to increase the door closing force from the failure determination means 5 and executes the door closing. The failure determination means 5 is in a state where the contact of the pressure sensor 7 remains open when foreign object detection is not continuously performed a predetermined number of times based on the detection signal detected by the foreign object detection device 3 by the forcible operation means. Thus, it is determined whether or not the foreign matter detection device 3 is in a state where it is not detected even if the pressure sensor 7 is always in contact with the foreign matter. Here, the protrusion 6 provided on the other foreign matter detection device 3 on the opposite side to the pressure sensor 7 incorporated in the one foreign matter detection device 3 is operated when the normal door closing operation of the door 2 is completed. After the door closing of the door 2 is completed by the door driving device 4, the mounting is adjusted so that the pressure sensor 7 is operated only when the door 2 is further moved in the door closing direction by further increasing the door closing force. Yes.

In addition, when the foreign matter detection device 3 detects a foreign matter when the failure judgment means 5 determines that the foreign matter detection device 3 is in an OFF failure, the control means described above assumes that the foreign matter detection device 3 has been restored to a normal state. As a result, the car 1 is returned to the normal operation state.

FIG. 2 is a flowchart illustrating an operation process according to the elevator door control device of the first embodiment. This operation process is started when the door driving device 4 performs a door closing operation (step S101) for changing the door 2 of the car 1 from the open state to the door closed state. 3 is determined (step S102). As a result of this determination, if there is a foreign object detection operation, it is considered that the foreign object detection device 3 has not failed (the cause of the failure has been eliminated), and the counter clear (step S109) process for resetting the counter is performed. However, if there is no foreign object detection operation (other safety devices such as a safety shoe shown in the diagram are not operating), the control means starts the elevator and starts the traveling of the car 1 (step S103).

Subsequently, when the failure determination means 5 detects that the car 1 has started running through the control means, it gives a command for increasing the door closing force (step S104) to the door drive device 4, and the door drive device 4 gives the command. When the door is closed, the foreign matter detection is forcibly performed by bringing the protrusion 6 of the other foreign matter detection device 3 into contact with the pressure sensor 7 of the foreign matter detection device 3. Also at this time, the failure determination means 5 determines whether or not there is a foreign object detection operation in the foreign object detection device 3 (step S105). As a result of this determination, if there is a foreign object detection operation, it is considered that the foreign object detection device 3 has not failed (the cause of the failure has been eliminated), and the counter clear (step S109) process for resetting the counter is performed. If the projection 6 is forcibly brought into contact with the pressure sensor 7 but there is no foreign object detection operation, the counter value is incremented by +1 from the previous value and stored by the control means. After performing the processing of +1 (step S106), as a determination of whether or not the counter value has reached a predetermined number of times (here, 3), it is determined whether or not counter ≧ 3 (step S107). Do. As a result of this determination, if the counter value is less than 3, the process returns to before the door closing operation (step S101) and the subsequent processing is repeated, but if the counter value has reached 3, the foreign object detection device 3 The operation process is terminated after assuming that it is a failure (step S108).

Here, an example has been described in which a foreign matter detection device 3 failure (OFF failure) is determined when the foreign matter detection operation of the foreign matter detection device 3 has not been performed three times in succession. It may be set to 2 or set to 4 or more. In addition, the failure determination means 5 applies the technique described in Patent Document 1, and the contact of the pressure sensor 7 is kept closed based on a detection signal that does not depend on the forcible operation means, so that the pressure sensor 7 is always a foreign object. It is also preferable to determine the ON failure of the foreign object detection device 3 in a situation where it is detected that the contact has been made.

According to the elevator door control device according to the first embodiment, the foreign matter detection device 3 is forcibly operated at a timing at which foreign matter detection by the foreign matter detection device 3 is not required by the door driving device 4 and the protruding portion 6 serving as forced operation means. If the foreign matter detection by the foreign matter detection device 3 is not performed continuously for a predetermined number of times by the failure determination means 5, the foreign matter detection device 3 has a function of judging an OFF failure (ON failure of the existing foreign matter detection device 3). Therefore, it is possible to detect a failure of the foreign object detection device 3 as accurately as possible, and an on-site diagnosis by a maintenance inspector is unnecessary, and an early countermeasure can be taken when a failure occurs.

FIG. 3 is a block diagram illustrating a schematic configuration of a monitoring system including an elevator door control device according to the second embodiment. In this monitoring system, the control unit described in the first embodiment is configured to include the failure determination unit 5. Specifically, the failure determination unit 5 outputs a command for increasing the door closing force to the door driving device 4. The control means 8 includes a configuration including an output unit 9, an input unit 10 for inputting a detection signal from the foreign object detection device 3, and a determination unit 11 for determining an OFF failure of the foreign object detection device 3 (or an ON failure of the foreign object detection device 3). It is equipped with. In addition, the control unit 8 calls the recording unit 12 that records the determination result by the determination unit 11 and when the determination result by the determination unit 11 is an OFF failure of the foreign object detection device 3 (or an ON failure of the foreign object detection device 3). It has a reporting unit 13 for reporting a failure to a remote monitoring center 15 such as an elevator maintenance company outside the apparatus via a communication line 14 such as a line.

In the monitoring system having such a configuration, the detection signal from the foreign object detection device 3 during traveling of the elevator (car 1) is input to the input unit 10 and the result of the foreign object detection of the detection signal input to the input unit 10 is obtained. The determination of the OFF failure of the foreign object detection device 3 by the determination unit 11 is performed in the same manner as in the elevator door control device described in the first embodiment. The determination result of the foreign matter detection device 3 of the determination unit 11 that is OFF failure or ON failure is output to the recording unit 12 as needed, and is also output to the notification unit 13 in addition to being recorded by the recording unit 12. Therefore, when the determination unit 11 sends the determination result of the OFF failure or the ON failure of the foreign object detection device 3, the notification unit 13 remotely notifies that the OFF failure or the ON failure has occurred via the communication line 14. Notify the monitoring center 15. In the remote monitoring center 15, when there is a notification from the notification unit 13 of the control means 8 that an OFF failure or an ON failure has occurred in the foreign object detection device 3, a maintenance inspector is immediately dispatched to the site. A maintenance inspector can appropriately determine that an OFF failure or an ON failure has occurred in the foreign object detection device 3 by checking the recorded contents (information) of the recording unit 12 of the control means 8 when he / she goes to the site. Therefore, on-site diagnosis by a maintenance inspector becomes unnecessary, and the failure of the foreign object detection device 3 can be recovered early.

DESCRIPTION OF SYMBOLS 1 Car 2 Door 3 Foreign object detection device 4 Door drive device 5 Failure determination means 6 Protrusion part 7 Pressure sensor 8 Control means 9 Output part 10 Input part 11 Failure determination part 12 Recording part 13 Notification part 14 Communication line 15 Remote monitoring center

Claims

A foreign object detection device provided with a pressure sensor for detecting a state in which a foreign object is caught in the door when the door is closed, and provided at a front end of the door of the elevator car. An elevator door control device having a function of preventing the traveling of the car in a state where the foreign object is sandwiched between the doors based on the detection signal detected by the foreign object,
Forced operation means for forcibly operating the foreign object detection device at a timing when foreign object detection is not required by the foreign object detection device, and detection of the foreign object based on a detection signal detected by the foreign operation detection device by the foreign operation detection device. Is not performed continuously for a predetermined number of times, the contact of the pressure sensor remains open, and the foreign object detection device is turned off in a situation where the pressure sensor is not always detected even if it contacts the foreign object. An elevator door control device comprising: failure determination means for determining failure.

2. The elevator door control device according to claim 1, wherein the forcible operation means drives the opening and closing of the protrusion provided at the front end of the door on the other side of the door, and the failure determination means. An elevator door control device comprising: a door driving device that receives a command to increase the door closing force of the door and performs door closing.

3. The elevator door control device according to claim 1, wherein when the foreign matter detection device detects a foreign matter when the failure judgment means judges the OFF failure of the foreign matter detection device, the foreign matter detection device is An elevator door control device comprising control means for assuming that the vehicle is restored to a normal state and returning the car to a normal operation state.

The elevator door control device according to claim 1, wherein the failure determination unit is in a state in which the contact of the pressure sensor remains closed based on the detection signal not based on the forcible operation unit. An elevator door control device that determines whether or not the foreign matter detection device is always in contact with a foreign matter and detects an ON failure.

4. The elevator door control apparatus according to claim 3, wherein the control means includes the failure determination means, a recording unit for recording the determination result by the failure determination means, and the determination result by the failure determination means is the foreign object detection. An elevator door control device comprising a notification unit for reporting a failure to the outside of the device when the device is in an OFF failure or an ON failure.

6. The elevator door control device according to claim 5, wherein the failure determination means includes an output unit that outputs a command for increasing the door closing force to the door driving device, an input unit that inputs the detection signal, and the An elevator door control device comprising a determination unit for determining an OFF failure or an ON failure of a foreign object detection device.