JP4234465B2 - Elevator door control device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an elevator door control device having means for detecting and notifying when a foreign object is caught in an elevator car door.
[0002]
[Prior art]
Conventionally, an elevator has a car door and a landing door that are fully closed after the car door and the landing door are opened and passengers get on and off, and this is detected by the car door full closing detection switch and the landing door full closing detection switch. The elevator is started only when the detection signal is transmitted to the elevator control device. During the door closing operation, if there is any obstacle such as luggage in the traveling direction of the door, the safety shoe installed at the tip of the car door usually detects the presence of the obstacle and the safety shoe operation detection switch The operation signal is transmitted to the elevator control device. Then, the elevator control device issues a door opening command to the car door driving device to reverse the door in the opening direction (see, for example, Patent Documents 1 and 2).
[0003]
The conventional foreign object pinching detection device for the elevator door as described above can detect sufficiently accurately when an object having a certain degree of hardness and thickness is pinched in front of the door in the traveling direction during the door closing operation. is there.
[0004]
However, it is difficult to detect with a safety shoe in a situation where a string that is deformed by the pressure when sandwiched between safety shoes or a thin string that is not deformed but has a diameter of a certain degree or less is sandwiched between safety shoes. As a result, the door closing operation is continued, the operation signals of the car door full-closed detection switch and the landing door full-closed detection switch are transmitted to the elevator control circuit, and the elevator starts with foreign objects such as strings held between the doors. There is a risk of it.
[0005]
[Patent Document 1]
Japanese Patent Laid-Open No. 7-267549 [Patent Document 2]
JP-A-6-227781 [0006]
[Problems to be solved by the invention]
As described above, the foreign object pinching detection device in the conventional elevator door cannot detect a situation where a thin string-like soft object such as clothes or a rope is caught in the elevator door in a state of straddling the car room and the landing. It was. Therefore, when clothes, strings, or the like are sandwiched between elevator doors, there is a risk that the vehicle travels with foreign objects sandwiched without detecting it.
[0007]
In order to eliminate the above inconveniences, the present invention can detect even a foreign object such as clothing or a rope caught in an elevator door, and can detect it well to realize a safer driving of the elevator. An object of the present invention is to provide a door control device.
[0008]
[Means for Solving the Problems]
An elevator door control device according to a first aspect of the present invention is provided on a door contact surface of an elevator car door, and detects a foreign object detection signal when a foreign object is caught in the elevator car door when the elevator door is fully closed. A foreign matter detection device that outputs a warning signal processing means for issuing a warning in response to the foreign matter detection signal emitted from the foreign matter detection device, a means for prohibiting start of an elevator in response to the foreign matter detection signal, Means for opening the elevator car door in response to a foreign object detection signal, and the foreign object detection device comprises a cable switch operated by pressure acting on a door contact surface of the elevator car door , the cable switch comprises a pair of units the cable switch which is bisected in the vertical direction of the elevator car door, the two units cable scan And it performs foreign object detection using a generation time difference of the foreign matter detection signal in pitch, characterized in that.
[0009]
An elevator door control device according to a second aspect of the invention is provided on a door contact surface of an elevator car door, and detects a foreign object detection signal when a foreign object is caught in the elevator car door when the elevator door is fully closed. A foreign matter detection device that outputs a warning signal processing means for issuing a warning in response to the foreign matter detection signal emitted from the foreign matter detection device, a means for prohibiting start of an elevator in response to the foreign matter detection signal, Means for opening the elevator car door in response to a foreign object detection signal, and the foreign object detection device comprises a cable switch operated by pressure acting on a door contact surface of the elevator car door , the cable switch consists bisected pair of units the cable switch in the thickness direction of the elevator car door, the two units Cave And it performs foreign object detection using a generation time difference of the switch of the foreign object detection signal, characterized in that.
[0010]
According to a third aspect of the invention, in the elevator door control device according to the first or second aspect , when the foreign object detection device detects that a foreign object is caught in the elevator car door, an alarm announcement by a speaker, At least one of the alarm by the buzzer, the alarm display on the display, and the alarm light emission by the light emitting device is equipped with an alarm device that warns that a foreign object has been caught in the elevator car door in at least one of the car and the landing . , characterized in that.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
< Reference example >
Before describing an embodiment of an elevator door control device according to the present invention , a reference example will be described in detail with reference to FIGS. 1 and 2. FIG. 1 is a view of a landing when the vicinity of an elevator door is viewed from the front side, and FIG. 2 is an enlarged perspective view showing a portion of a car door in the apparatus of FIG.
[0014]
The elevator apparatus shown in FIG. 1 and FIG. 2 uses an elevator car door as a foreign object detection device by using a cable switch 3 that operates when a foreign object 4 is sandwiched between door contact surfaces of elevator car doors 1a and 1b and sends out an operation signal. It is provided on the door contact surfaces 1a and 1b. The cable switch 3 is a pressure detection switch configured by combining a conductive rubber and a conductive wire, and is a switch that utilizes the fact that the resistance value greatly changes when pressure is applied from the surroundings, and is well known per se. . When the car doors 1a and 1b are fully closed, if the foreign object 4 is caught in the car doors 1a and 1b, the cable switch 3 is operated and the operation signal is sent to the detection circuit 6. When receiving the operation signal from the cable switch 3 , the detection circuit 6 sends it as a foreign object detection signal to the elevator control device 9, the car door driving device 10, and the alarm signal processing means 5. The alarm signal processing means 5 is connected to an alarm device 7 provided in at least one of the car doors 1a and 1b and the car. A door safety shoe 2 that is conventionally provided as a means for detecting foreign object pinching in the car doors 1a and 1b is also schematically shown.
[0015]
When the foreign object 4 is caught between the door contact surfaces of the car doors 1a and 1b during the fully-closed operation of the car doors 1a and 1b, the cable switch 3 detects this as a pressure receiving force and sends an operation signal to the detection circuit 6. Upon receiving the operation signal, the detection circuit 6 sends a foreign object detection signal to the elevator control device 9, the car door driving device 10, and the alarm signal processing means 5. Thereby, the elevator control device 9 prohibits the start of the elevator, causes the car doors 1a and 1b to be reversed in the door opening direction via the car door driving device 10, and further alerts the alarm device via the alarm signal processing means 5. 7 is operated to alarm that a foreign object has been caught in the car doors 1a and 1b.
[0016]
According to this reference example , not only hard foreign objects but also soft foreign objects, such as clothes or strings, are caught in the car doors 1a and 1b. The car doors 1a and 1b can be opened to remove the trapped foreign matter, and the car doors 1a and 1b can be closed again and the elevator can be restarted.
[0017]
< Embodiment 1 >
FIG. 3 shows Embodiment 1 of the present invention. Here, the cable switch is composed of a pair of unit cable switches 8a and 8b which are divided into two in the vertical direction of the elevator car doors 1a and 1b. When the car doors 1a and 1b are fully closed, both unit cable switches 8a and 8b are operated sooner or later, but when the foreign object 4 is not present, the operation signals of both unit cable switches 8a and 8b are generated simultaneously. However, when the foreign object 4 is sandwiched between the door contact surfaces of the car doors 1a and 1b, the operation timing of the unit cable switches 8a and 8b is shifted depending on the sandwiched position. Foreign matter detection can be performed. The operation mode after foreign object detection is the same as in FIGS.
[0018]
< Embodiment 2 >
FIG. 4 shows a second embodiment of the present invention. Here, the cable switch includes a pair of unit cable switches 8c and 8d that are divided into two in the thickness direction of the elevator car doors 1a and 1b. In this case, the detection circuit 6 outputs a foreign object detection signal only when the unit cable switches 8c and 8d are operated when the car doors 1a and 1b are fully closed. When only the unit cable switch 8d on the cab side is turned on, no foreign object detection signal is output.
[0019]
The operation after the detection circuit 6 detects that the foreign object 4 is sandwiched between the car doors 1a and 1b is the same as that described with reference to FIGS.
[0020]
<Effect of Embodiment>
As described above, according to the present embodiment, when there is a foreign object 4 sandwiched between the car doors 1a and 1b when the car doors 1a and 1b are fully closed, the pressure received through the sandwiched foreign object 4 is detected. Using a cable switch that generates an operation signal, the trapping of the foreign object 4 is detected before the elevator is started, the elevator is started, that is, the start of traveling is prohibited, the car doors 1a and 1b are reversed in the opening direction, By issuing an alarm for the object, it is prohibited to run as it is, even if it is a thick and hard foreign object, even if a rope or other soft foreign object is sandwiched, Passenger safety can be increased.
[0021]
Therefore, it is possible to prevent the elevator apparatus from being damaged due to the wrapping of the foreign matter 4 that has been sandwiched or the like, or the elevator confinement failure due to the car doors 1a, 1b and the landing door switch being cut off.
[0022]
【The invention's effect】
According to the present invention, when a foreign object is caught in the car door during the fully closed operation of the car door, the operation signal is generated in response to the pressure received by the cable switch, and the foreign object detection signal is generated based on the operation signal. Before starting the elevator, it is prohibited to start the elevator, that is, to start running, reverse the car door in the opening direction, and issue a warning to the passenger, thereby improving passenger safety and achieving safe driving of the elevator be able to.
[Brief description of the drawings]
FIG. 1 is a view of a landing when a vicinity of an elevator door is viewed from the front side, showing a reference example of a foreign object detection device for an elevator door according to the present invention.
2 is an enlarged perspective view showing a portion of a car door in the apparatus of FIG. 1. FIG.
FIG. 3 is a perspective view showing a first embodiment of a foreign object detection device including a cable switch in the device of FIG. 1;
4 is a perspective view showing a second embodiment of a foreign object detection device including a cable switch in the device of FIG. 1. FIG.
[Explanation of symbols]
1a, 1b Car door 2 Door safety shoe 3 Cable switch 4 Foreign matter 5 Alarm signal processing means 6 Detection circuit 7 Alarm device 8a, 8b, 8c, 8d Unit cable switch 9 Elevator control device 10 Car door drive device

Claims (3)

A foreign object detection device that is provided on the door contact surface of the elevator car door and detects a foreign object caught in the elevator car door when the elevator door is fully closed, and outputs a foreign object detection signal. Alarm signal processing means for issuing an alarm in response to the foreign object detection signal, means for prohibiting elevator start in response to the foreign object detection signal, and opening the elevator car door in response to the foreign object detection signal and a means for,
The foreign object detection device comprises a cable switch that operates by pressure acting on a door contact surface of the elevator car door ,
Moreover, this cable switch consists of a pair of unit cable switches divided in the vertical direction of the elevator car door, and performs foreign object detection using the difference in the generation time of the foreign object detection signal of both unit cable switches .
An elevator door control device characterized by the above. A foreign object detection device that is provided on the door contact surface of the elevator car door and detects a foreign object caught in the elevator car door when the elevator door is fully closed, and outputs a foreign object detection signal. Alarm signal processing means for issuing an alarm in response to the foreign object detection signal, means for prohibiting elevator start in response to the foreign object detection signal, and opening the elevator car door in response to the foreign object detection signal and a means for,
The foreign object detection device comprises a cable switch that operates by pressure acting on a door contact surface of the elevator car door ,
Moreover, this cable switch is composed of a pair of unit cable switches divided in two in the thickness direction of the elevator car door, and performs foreign object detection using a difference in generation time of the foreign object detection signal of both unit cable switches .
An elevator door control apparatus characterized by the above. When the foreign object detection device detects that a foreign object has been caught in the elevator car door, at least one of an alarm announcement by a speaker, an alarm by a buzzer, an alarm display on a display, and an alarm light emission by a light emitting device, At least one of the inside of the car and the landing area is equipped with an alarm device that warns that a foreign object has been caught in the elevator car door .
The control device for an elevator door according to claim 1 or 2, wherein the control device is an elevator door.

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