JP2002154774A - Door device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve the problem that a landing door switch for detecting the door opening and closing condition to determine whether an elevator can be operated or not stops the elevator in an emergency and locks passengers in the elevator by determining that the door is opened by a contact failure and the wrong operation when an impact is applied to the door. SOLUTION: A light projector means 1 and a light receiver means 2 are provided in specified floors at a building side so that a photoelectric beam from the light projector means 1 reaches the light receiver means 2 through the predetermined optical path 21, and a second means is provided to detect opening and closing of the landing floor doors 3a and 3b with a shutoff of the optical path 21 when the landing floor doors 3a and 3b between the light projector means 1 and the light receiver means 2 are opened. In the ordinary operation, door opening and closing condition is detected by a detecting means 6 for the landing floor doors 3a and 3b, and when the first detecting means detects the opening condition and the second detecting means detects the closing condition in the lock-in condition, the rescue operation is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an elevator door device for detecting an open / close state of an elevator door.

[0002]

2. Description of the Related Art It is important to grasp the open / closed state of elevator landing doors and car doors in order to ensure the safety of passengers during operation. In particular, the landing door has a locking function so that it cannot be opened from the outside. The locked state is detected by a door switch provided at the landing door, and the state of the switch controls whether the elevator can be operated or not. By the way, this door switch, which is important for ensuring the safety of passengers, is liable to cause poor contact due to its structure, and it is difficult to determine the faulty floor in the control sequence. As a method of improving this, for example, Japanese Patent Application Laid-Open No. 60-10237
A technique described in Japanese Patent Application Publication No. 7-1995 is known. These conventional techniques detect the poor contact and control the operation of the elevator. When the car door detects the open state, the elevator control device stops the elevator in an emergency and secures passenger safety. A detection switch that operates when a passenger kicks or forcibly opens the car door while the elevator is operating will not return unless the car door has a self-closing force. In this case, the passengers are in a confined state, but in order to ensure safety, the elevator is not operated and is stopped, and the maintenance staff rescues the passengers from the confinement.

[0003]

The landing door is provided with a small gap in each movable part for smooth opening and closing. There are various causes of poor contact such as collision from the landing side to the landing door, abrasion and mechanical deformation of the movable portion of the door, dust entering the movable portion and preventing safe door closing and locking failure. For this reason, a landing door switch failure occurs in addition to the poor electrical contact of the door switch. At this time, the landing door may be closed but cannot be detected by the door switch. In addition, if a failure is detected during driving, the elevator stops at an emergency, so that the car stops at a place other than the landing and traps passengers.

An object of the present invention is to solve the above-mentioned problems of the prior art, and to provide an elevator door device capable of eliminating a passenger confinement failure due to a landing door failure.

[0005]

In order to achieve the above object, the present invention provides first detecting means for detecting the open / closed state of a landing door and third detecting means for detecting the open / closed state of a car door. This is achieved by providing an elevator door device having a second detection means for detecting one or both of the open / closed state of the landing door and the open / closed state of the car door.

According to the present invention, the state of each floor landing door is detected by the first and second detection means in the normal operation state, and the detection results are compared. If the two do not match, if the first detection means detects that the door is closed, the operation is continued and it is determined that the second detection means has failed. When the second detecting means detects that the door is closed and the elevator is in a state of trapping passengers, the rescue operation is performed, the stopped state is maintained, and the failure of the first detecting means is displayed, stored, and reported. To do it.

[0007] As described above, the door device of the present invention can prevent passengers from being trapped even when the door switch breaks down.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a configuration diagram in an embodiment of the present invention.

FIG. 1 shows a second detection means in which a photoelectric beam is radiated to a specific area between specific floors so that the presence or absence of this beam shielding can be detected. Landing door 3
The members a and 3b can be moved in accordance with the opening and closing directions by being suspended on the rail 32 via the roller 33 and guided by the lower end member 31 of the door. The car doors 4a and 4b of the car 5 can be moved in accordance with the opening and closing directions by being suspended on the rails 42 via rollers 43 and guided by door lower end members 41. The open / close state of the landing doors 3a, 3b is detected by a door switch 6, which is a first detecting means. The second detecting means emits a photoelectric beam from the light projecting means 1 to the optical path 21 along the landing doors 3a, 3b. It passes between the door lower end members 31 and 41 and reaches the light receiving means 2 between the cars 4a and 4b and the landing doors 3a and 3b. In the light receiving means 2, when a required amount of light is received, an internal switch is turned on. Power supply 2
When the relay 22 connected to 3 is operated via this switch, the operation of the contact of the relay 22 is turned on when the amount of received light is a required amount.

FIG. 2 shows the configuration of the present invention viewed from another direction. When the car 5 stops at a predetermined position on the floor of the landing, the engaging rollers 64, 65 attached to the landing door 3a.
When the engaging plates 44 and 45 attached to the car door 4a are sandwiched and the car doors 4a and 4b are opened and closed by a door driving device (not shown), the landing doors 3a and 3b are interlocked.
Also open and close. When the car 5 is driven by a control device (not shown) and moves upward or downward, an interval is provided so that the lower end member 31 of the landing door and the engaging plates 44 and 45 do not collide. Similarly, the gap between the lower end member 41 of the car door and the engaging rollers 64 and 65 is maintained so as not to collide. The optical path 21 is set so as to pass through the illustrated position between the lower end members 31 and 41 near the engagement plate 44.

When the car 5 stops at a predetermined position on the floor of the landing and the car doors 4a and 4b are opened by the door driving device, the landing doors 3a and 3b are also opened in conjunction therewith. 64 and 65 block the optical path 21. At this time, since the amount of light reaching the light receiving means 2 in FIG. 1 is received less than the required amount of light, the internal switch is turned off. Therefore, the operation of the contact of the relay 22 connected to the power supply 23 is turned off.

The door switch 6 shown in FIG. 2 is normally locked so that it cannot be opened from the landing side. The lock is configured to release when pressed. However, if the lock is released for some reason, the car 5 is not engaged on the floor where the car 5 has not landed.
The landing doors 3a, 3b can be easily opened because there is no 4, 45. At this time, when the landing doors 3a and 3b are opened, the engagement rollers 64 and 65 move, so that the optical path 21 is shielded, so that the operation of the contact point of the relay 22 is turned off.

As described above, the second detecting means can detect the opening of the landing doors 3a and 3b. In the configuration shown in the figure, the installation of the detecting means for each floor is unnecessary, so that the cost can be reduced. It is also effective for standardization because it is not necessary to change the attachment to an existing elevator for each model. Further, when the light emitted from the light projecting means 1 is dimmed, or when the amount of light received is reduced due to contamination of the light receiving means 2 or the like, it is detected as an open door, so that the detection means is fail-safe.

FIG. 3 shows a flow chart of the state detection and processing of the landing doors 3a, 3b. During normal operation, the car 5 is on the predetermined building floor and the car door 4 of the car 5
The processing other than the case in which a and b are released is shown. The door is not opened for safety except when the elevator performs predetermined control to open the door. In FIG. 3, the first
If the door opening is detected by the detecting means, and if the door is not opened, the second detecting means detects the door opening, and if not, the elevator operation control processing is continued.

When the first detecting means detects that the door has been opened, the elevator is emergency stopped to ensure safety. At this time, the car 5 stops at a place other than the predetermined floor of the building, and passengers are trapped in the car 5. Therefore, if the door is opened and checked by the second detecting means, and the door is opened, the elevator keeps the stopped state. When the passenger is not opened, a rescue operation is performed based on a rescue operation command from the elevator control device to rescue the passenger from the confined state. When the rescue operation cannot be performed according to the judgment of the elevator control device, no rescue operation command is issued, so that the vehicle is stopped as it is and rescued by a maintenance person or the like. When the second detecting means detects the opening of the door, the elevator control device performs a failure notification, display, storage, and the like, so that the maintenance staff can restore the function.

As described above, it is possible to rescue a trap which has been trapped by the conventional landing door detecting means alone.

FIG. 4 is a block diagram showing another embodiment of the present invention. Conventionally, the car 5 has car doors 4a and 4a.
When the third detecting means 7 for detecting the open / close state of the car b is provided and the opening of the car door 4 is detected, the elevator control device stops the elevator in an emergency and secures passenger safety. In the present embodiment, the rescue operation can be safely performed when the third detection means operates. The shielding member 46 is attached to the car door 4a near the optical path 21. Car 5
Stops at a predetermined position on the floor of the landing and the car door 4
When the doors a and 4b are opened by a door driving device (not shown), the landing doors 3a and 3b are also opened in conjunction therewith. At this time, the shielding member 46 shields the optical path 21 during the opening. At this time, since the amount of light reaching the light receiving means 2 in FIG. 1 decreases, the amount of received light decreases below a required value, and the internal switch is turned off. Therefore,
The operation of the contact of the relay 22 connected to the power supply 23 is turned off. Therefore, the operation of the contact of the relay 22 connected to the power supply 23 is turned off. Even when the car 5 is between floors, the open / close state of the car doors 4a and 4b can be detected in the same manner.

FIG. 5 is a flowchart showing the detection and processing of the car doors 4a and 4b. When a command to open the car door 4 is not issued from an elevator control device (not shown), the detection results of the third detection means 7 and the second detection means must be "closed". The third detecting means 7 is "open"
If this is the case, stop the elevator and secure passenger safety. Further, a failure display, storage, and notification processing of the detection means are performed, and the detection result of the second detection means is checked. If "open", the stopped state is maintained and waiting for rescue by maintenance personnel. If the result of the detection by the second detecting means is "closed", it is checked whether there is a rescue operation command from an elevator control device (not shown). Stop until it stops.

When the second detecting means detects that the door has been opened, the elevator control unit reports a failure, displays a message,
After repairing the memory, the maintenance staff will restore the function.

As described above, even if the third detecting means 7 of the car door operates for some reason, the car can be rescued without causing a confinement failure, and confinement can be reduced.

In the above description, the first detecting means or the third detecting means has been described as having a higher priority than the second detecting means. However, it is possible to treat them equally as follows.

FIG. 6 shows a flowchart for determining a failure of the detecting means. Processing is performed in this sequence during normal operation. If the state of the first or third detecting means is "open" when the car door is opened at the predetermined stop position, it is not a failure. Further, when the second detection means is "open", the processing is terminated because it is not a failure. At this time, if the first or third detection means is "closed", it is a failure, so that necessary processing such as failure display, storage, and notification of the detection means is performed.
Next, the state of the second detecting means is checked, and if "open", this processing is terminated. Similarly, the second detection means is “closed”
If this is the case, it is a failure, so that necessary processing such as failure display, storage, and notification of the detection means is performed, and the elevator is stopped and not operated. In these states, inspection and repair can be performed immediately, and the operation of the elevator can be continued by one of the detection means.

When the car door is "open" as determined by an elevator control device (not shown), the same processing is performed as shown in FIG.

In this way, a double system can be configured, so that a confinement failure due to a failure related to a door switch can be greatly reduced. However, in a state where one of them is out of order, FIG.
The rescue operation based on the concept shown in Fig. Cannot be performed.

FIG. 7 shows the structure of another embodiment of the present invention. The shielding member 46 was attached to the car door 4b near the optical path 21, and the shielding member 32 was also attached to the landing door 3b. Car doors 4a, 4b and landing door 3
When a and 3b are opened, the shielding member 46 is in the middle of opening.
32 shields the optical path 21. At this time, the light receiving means 2 of FIG.
Since the amount of light reaching the light source decreases, the amount of received light decreases below a required value, and the internal switch is turned off. Therefore, the operation of the contact of the relay 22 connected to the power supply 23 is turned off. The open / closed state of the car doors 4a and 4b and the landing doors 3a and 3b can be detected.

[0026]

As described above, according to the present invention, the problems of the prior art can be solved and rescue operation can be performed.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing one embodiment of the present invention.

FIG. 2 is a configuration diagram of the present invention viewed from another angle.

FIG. 3 is a processing flowchart of the present invention.

FIG. 4 is a configuration diagram showing another embodiment of the present invention.

FIG. 5 is a processing flowchart of the present invention.

FIG. 6 is a processing flowchart of the present invention.

FIG. 7 is a configuration diagram showing another embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 light emitting means 2 light receiving means 3 a, 3 b landing door 4 a, 4 b car door 6 conventional landing door detecting means 21 optical path

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3F304 CA12 CA15 DA01 EA30 EA34 EB05 3F305 BA11 3F307 DA00 DA25

Claims (3)

[Claims] 1. An elevator door device having first detection means for detecting the opening / closing state of a landing door and third detecting means for detecting the opening / closing state of a car door, wherein the opening / closing state of the landing door, the car door An elevator door device comprising a second detecting means for detecting one or both of the open and closed states of the elevator. 2. The elevator door apparatus according to claim 1, wherein the rescue operation is performed by the second detecting means when the first and third detecting means are out of order. 3. The elevator door apparatus according to claim 1, wherein said second detecting means comprises a light projecting means and a light receiving means.