JP2001139268A - Elevator control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide, at low cost, an elevator control device capable of preventing a passenger from being locked in a car. SOLUTION: In an elevator device where a door is closed when a specified time is elapsed after the door is opened, if a call allocated to the elevator is absent when the door of the elevator is open and it is judged that either a door close button or a destination floor button inside the elevator or a platform button on those floors other than a floor where the elevator stops is not pressed, the door of the elevator is kept open.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device for an elevator, and more particularly to a control for opening and closing a door.

[0002]

2. Description of the Related Art When a door is closed after all calls have been answered, a door is not opened until a door open button or a destination floor button in a car is pressed or a landing button of a hall is pressed. Does not run.

[0003] For this reason, if an infant or the like who cannot reach the buttons in the car gets on the elevator by itself, it will be trapped. Further, even if the landing button is reachable, there is a possibility that a passenger who cannot operate normally, for example, an elderly person with dementia, may accidentally operate the landing button and get stuck in the car and be trapped.

In order to prevent such a problem, conventional techniques are described in Japanese Utility Model Laid-Open No. 59-71269, Japanese Utility Model Laid-Open No. 4-5470, Japanese Patent Laid-Open No. 5-70044, and Japanese Patent Laid-Open No. 6-271257. As described above, a technique has been proposed in which the operation of the car is not performed even if a predetermined time has elapsed since the door was closed, and the door is automatically opened when it is detected that there is a passenger in the car. In this case, as means for detecting passengers, an in-car load detector and an infrared detector have been proposed.

[0005]

However, in the case of the above-mentioned prior art, it is necessary to provide an in-car load detector and an infrared detector as means for detecting passengers, which raises a problem of increasing the product cost. The load detector in the car is always attached to the normal elevator, but since the main purpose is to issue an alarm when the load exceeds the load, for example, the accuracy of detecting the presence or absence of the load unless five or more adults are on board Many are coarse.

Therefore, in order to be able to detect the load even when only one child is riding as in the prior art, it is necessary to change to an expensive load detector.

An object of the present invention is to provide an inexpensive elevator control device for preventing passengers from being trapped in a car.

[0008]

SUMMARY OF THE INVENTION To achieve the above object, the present invention comprises a car serving a plurality of floors,
When a predetermined time has passed since the elevator door opened,
In an elevator control device provided with means for closing the door, when the door of the elevator is opened, call presence / absence determination means for determining whether or not there is a call assigned to the elevator, and a call assigned to the elevator, If not, at least one of a door close button in the elevator, a destination floor button, or a landing button on a floor other than the floor where the elevator is stopped.
Door closing condition determining means for determining whether or not one has been pressed;
When the door closing condition determining means detects that none of the three buttons is pressed, door opening maintaining means for keeping the elevator door open is provided.

[0009]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a diagram showing a system configuration according to an embodiment of the present invention. Car 1 and counterweight 2
Is hung on the sheave 4 by the rope 3.

The sheave 4 is rotated by a motor 5 to drive the car 1 and the counterweight 2. The control device 6 instructs traveling / stop of the elevator.

The operation control means for realizing the door opening / closing command according to the present invention includes a door opening / closing command control section 61 in the control device 6.
It is provided as. A call presence / absence determining unit that determines whether there is a call assigned to the elevator when the door of the elevator is opened in the door opening / closing command control unit 61.
611, if there is no call assigned to the elevator, at least one of a door close button in the elevator, a destination floor button, or a landing button on a floor other than the floor where the elevator is stopped is pressed. If the door closing condition determining unit 612 and the door closing condition determining unit 612 determine that none of the three buttons is pressed, the elevator door remains open. A door opening maintaining section 613 is provided. However, from the point of view of disaster prevention, the time for keeping the door open shall be limited to a maximum of 3 minutes.

Here, the control device 6 controls the traveling of the elevator.
A number of processes relating to the stop are performed, but since these processes are a known technology in Japanese Patent Application Laid-Open No. 51-89643 and the like, only the portions relating to the present invention will be described in the description of the embodiments.

FIG. 2 is a flow chart showing a door open maintenance control process executed by the door open / close command control section 61. Since the operation related to opening and closing the door is a well-known technique, the description is omitted here, and only the function of maintaining the door open will be described.

The door opening maintaining control process is activated by
It is assumed that the door of the elevator is opened and there is no call assigned to the elevator.

As shown in FIG. 2, the door opening maintaining control process is performed when the door close button is pressed (step S1) or when the destination floor button is pressed (step S1).
2) Or, if any of the landing buttons on floors other than the floor where the car is stopped is pressed (step S3), a command to close the door is issued (step S3).
5), end the processing.

If none of the conditions from step S1 to step S3 is met, the door is left open (step S4) and the process is terminated. However,
From a disaster prevention point of view, the time to keep the door open shall be limited to a maximum of 3 minutes. Thus, the door is closed after three minutes.

Here, it is assumed that there is no call to which the start condition of the door opening maintaining control process is assigned. If there is a call already assigned, a passenger from another floor may come in or a passenger may already get in. This is because it is unlikely that a child or the like will be trapped even if he or she accidentally gets on the elevator.

If the door is opened while there is an assigned call, the door opening / closing control is performed as usual. For example, after the door is opened in response to the call, a predetermined time can be set without pressing the door close button. The door closes automatically after a lapse of time (for example, 3 seconds).

According to the present embodiment, it is possible to prevent passengers from being trapped at low cost without adding hardware such as an infrared detector or changing the load detector in the car to a high-precision one.

[0021]

As described above, according to the present invention, it is possible to provide a control device which can prevent passengers from being trapped at low cost.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a system configuration according to an embodiment of the present invention.

FIG. 2 is a flowchart of a process of opening a door to prevent passengers from being trapped.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Riding car, 2 ... Counterweight, 3 ... Rope, 4 ... Sheave, 5 ... Motor, 6 ... Control device, 61 ... Door opening / closing command control part, 611 ... Call presence / absence detection part, 612 ... Door closing condition judgment Department,
613… Door opening maintenance unit.

Continued on the front page (72) Inventor Kazuhiro Segawa 1070 Ma, Hitachinaka-shi, Ibaraki F-term in the elevator group of Hitachi, Ltd. (Reference) 3F002 AA05 GB03 3F307 BA05 EA00 EA12

Claims (2)

[Claims] 1. A control device for an elevator having a car for servicing a plurality of floors and closing a door when a predetermined time has passed since the elevator door was opened,
When an elevator door is opened, call presence / absence determining means for determining whether or not there is a call assigned to the elevator, and when there is no call assigned to the elevator, a door close button in the elevator, or A door closing condition determining unit that determines whether at least one of a destination floor button or a landing button on a floor other than the floor where the elevator is stopped is pressed; An elevator control device comprising: a door opening maintaining means for opening the door of the elevator when it is detected that none of the buttons is pressed. 2. The elevator according to claim 1, wherein the door opening maintaining means opens the elevator door when the door closing condition determining means detects that none of the three buttons is pressed. An elevator control device that closes a door after a predetermined period of time.