JP4794179B2 - Elevator door control device - Google Patents

Description

  The present invention relates to an elevator door control device, and in particular, a door control for a elevator in which a mechanical safety device and a non-contact safety device are provided side by side as a protection device in contact with a passenger on the elevator door. Relates to the device.

  A safety device is provided at the door of the elevator to prevent an accident that may cause injury when a passenger is caught in the door. The operation system of this type of safety device is roughly classified into a contact type that operates by mechanical contact and a non-contact type that operates using a non-contact sensor.

  In the contact-type safety device, a safety shoe is provided that protrudes from an end of the door, and the door is reopened by detecting a displacement when the safety shoe contacts the body of the passenger and moves backward.

  On the other hand, in a non-contact type safety device, a projector is provided at the door end of one door and a light receiver is provided as a pair at the door end of the other door. When the light is blocked, the door is reopened.

General elevators use either mechanical (contact type) or electric (non-contact) safety devices alone, or combine them to prevent malfunctions and malfunctions and improve reliability. (See Patent Document 1). This Patent Document 1 describes that a non-contact safety device is mainly used and a mechanical safety device is used in combination in the case where a projector or a light receiver fails.
JP-A-8-198556

  Conventionally, in an elevator door safety device regardless of mechanical (contact type) or electric (non-contact type), every time a passenger is detected between closed doors, the door is uniformly reopened to the fully open position. . This means that the door is reopened to the fully open position even when it is unnecessary for the purpose of preventing the passenger from being caught by the door.

  For example, it is common for passengers to jump in just before the door closes, but a non-contact safety device reliably detects a passenger who has jumped in and reopens the door to full open. Also, when the door is closed, part of the body of the passenger near the door and the baggage held by the passenger may inadvertently contact the door safety shoe. Even at this time, the door must be reopened to full open.

  Reopening the door to the fully open position when the safety device operates in this way is desirable in terms of certainty of ensuring safety, but depending on the specific situation, it may be necessary to open the door to the fully open position. It may be unnecessary from another viewpoint of operation efficiency.

  Therefore, an object of the present invention is to solve the problems of the prior art, reopen the door to meet the specific situation in which the safety device operates while ensuring safety, and operate the elevator. An object of the present invention is to provide an elevator door control device that ensures safety while considering efficiency.

In order to achieve the above-described object, the present invention provides an elevator that appropriately controls the opening / closing operation of a door drive unit while detecting obstacles such as passengers and luggage between the doors when the doors of the elevator are closed. In the door control device, a mechanical safety device that is operated by mechanical contact with the obstacle and generates an operation signal for fully opening the door is provided at a door end side of the door, and a door door A non-contact type safety device having a non-contact type sensor that detects the obstacle existing between the contact side ends, and a mechanical safety device that does not operate during the door closing operation, and a sensor unit of the non-contact type safety device On the condition that an obstacle detection signal has been detected from the vehicle, and a temporary stop means for temporarily stopping the door closing operation, and after the temporary stop, while the mechanical safety device is not in operation, Watching the obstacle detection signal from the sub unit, and resuming the door closing resuming means a door closing operation on condition that the detection of the obstacle detection signal is eliminated,
It is characterized by providing.

  According to the present invention, while ensuring safety, the door can be reopened so as to be adapted to the specific situation in which the safety device operates, and safety can be ensured while considering the operation efficiency of the elevator. it can.

Embodiments of an elevator door control device according to the present invention will be described below with reference to the accompanying drawings.
First embodiment
FIG. 1 shows a center open type door of an elevator to which a door control device of the present invention is applied from the front. Reference numerals 10a and 10b indicate left and right door panels constituting the main body of the door. Reference numeral 12 denotes a door driving device, and 13 denotes a door opening / closing control device.

  Safety shoes 14a and 14b of mechanical safety devices are provided at the door end portions of the door panels 10a and 10b, respectively. In this mechanical safety device, when the safety shoes 14a, 14b hit a part of the body such as a passenger's limb or an obstacle such as a luggage, the switches 15a, 15b are turned on, and an operation signal for fully opening the door is generated. It is supposed to occur. The operation signal when the switches 15a and 15b are switched on is sent to the door opening / closing control device 13, and this door opening / closing control device 13 gives the door driving device 12 a command to open the door to the fully open position. 10b opens to the fully open position.

  Next, reference numerals 20a and 20b denote non-contact sensors that detect obstacles existing between the door-end ends of the door. In this embodiment, displacement sensors are used as the non-contact sensors 20a and 20b, but other types of non-contact sensors such as a photoelectric sensor and an infrared sensor including a light projecting unit and a light receiving unit are used. You can also. Although it does not specifically limit about an attachment position, You may make it attach to the edge part of door panel 10a, 10b, or incorporate in safety shoes 14a, 14b.

  A signal that the non-contact sensors 20a and 20b detect an obstacle between the doors (hereinafter referred to as an obstacle detection signal) is output to the door opening / closing control device 13, and the door opening / closing control device detects the obstacle detection signal and the mechanical type. Based on the ON / OFF signals of the switches 15a and 15b of the safety device, the operation is performed in accordance with the flowchart of FIG. 2 to control the door opening / closing operation.

  First, in step S1, it is assumed that the door starts to close. If there are no obstacles, the closing operation proceeds normally and the door moves to the fully closed position. For example, if a passenger's luggage hits one of the safety shoes 14a and 14b, the mechanical safety device is activated. The operation of the mechanical safety device is detected by the ON signals of the switches 15a and 15b (yes in step S2), and the door opening / closing control device 13 fully opens the door (step S3).

  On the other hand, when a passenger's body or baggage is present between the doors to be closed and they are not in contact with the safety shoes 14a and 14b, the mechanical safety during the door closing operation is obtained. Although the device does not operate, the non-contact sensors 20a, 20b react. As a result, the door opening / closing control device 13 detects the presence of an obstacle based on the obstacle detection signal sent from the non-contact sensors 20a and 20b (yes in step S4). If it does so, it will progress to step S5 and the door opening / closing control apparatus 13 will suspend door closing operation | movement temporarily.

As a result, the door panels 10a and 10b are temporarily stopped at the position when the obstacle is detected. At this time, an announcement such as “Please leave the door because it is dangerous” may be made from the voice announcement device 22 to alert the passenger. (Step S6)
After the temporary stop, the process returns to step S1. Thereafter, the obstacle detection signals from the non-contact sensors 20a and 20b are monitored by repeating Step S2 and Step S4, and the obstacle detection signals sent from the non-contact sensors 20a and 20b when the obstacles disappear. (No in step S4), the process proceeds to step S7, and the door closing operation is restarted. Thereafter, when there is no obstacle, the door is closed to the fully closed position.

  As described above, when the mechanical safety device is not operating in the process of closing the door, the door is temporarily stopped on condition that the obstacle detection signal from the non-contact safety device is detected. So you don't have to open the doors. In addition, since the door closing operation is restarted on the condition that the detection is lost, the door closes immediately as soon as the obstacle is removed. It is possible to achieve both ensuring and operational efficiency.

  Here, instead of temporarily stopping the door closing operation in step S5 of the flowchart of FIG. 2, the door closing speed may be further reduced by one step as shown in step S5 'of FIG. In this case, when the door is quickly closed as soon as the obstacle is removed, the door is returned to the normal door opening speed. In this case, by combining with the announcement in step S6, if the door opening speed is made very slow, the safety will be sufficiently secured, and the door closing operation will continue without stopping the door, thus improving the operation efficiency. More useful.

Second embodiment
Next, a second embodiment of the present invention will be described with reference to FIG. 4 and FIG. In the second embodiment, after the door closing operation is temporarily stopped, the reopening operation is immediately performed for a predetermined distance from the temporary stop position of the door.

  First, in step S10, it is assumed that the door starts to close. If there are no obstacles, the closing operation proceeds normally and the door moves to the fully closed position. For example, if a passenger's luggage hits one of the safety shoes 14a and 14b, the mechanical safety device is activated. The operation of the mechanical safety device is detected by the ON signals of the switches 15a and 15b (step S11: yes), and the door opening / closing control device 13 fully opens the door (step S12).

  On the other hand, when there is an obstacle 50 such as a passenger's body or luggage between the doors to be closed and the obstacles 50 are not in contact with the safety shoes 14a and 14b, the door closing operation is performed. While the mechanical safety device does not operate, the non-contact sensors 20a, 20b react. As a result, the door opening / closing control device 13 detects the presence of an obstacle based on the obstacle detection signal sent from the non-contact type sensors 20a, 20b (step S13yes). If it does so, it will progress to step S14 and the door opening / closing control apparatus 13 will stop a door closing operation once. At this time, the edge part of door panel 10a, 10b exists in the position shown with a dashed-dotted line in FIG.

  The operation so far is the same as in the first embodiment, but in this second embodiment, a certain distance is reopened as follows (step S15). That is, the door is opened by a predetermined distance A from the position where the obstacle is detected, and the door opening operation is temporarily stopped when the movement distance of the door reaches A (steps S16 and S17).

  After the temporary stop, the process returns to step S11. Thereafter, in step S11 and step S12, the obstacle detection signals from the non-contact sensors 20a and 20b are monitored, and when there are no obstacles, the process proceeds to step S18 to restart the door closing operation. Thereafter, when there is no obstacle, the door is closed to the fully closed position.

  As described above, when the mechanical safety device is not operating in the process of closing the door, when the obstacle detection signal from the non-contact safety device is detected, the door is reopened by a predetermined distance from that position. In addition, since the door is quickly closed as soon as the obstacle is removed, it is possible to ensure both safety during opening and closing of the door and the operation efficiency without lowering the operation efficiency due to the operation of the safety device.

Third embodiment
Next, a third embodiment of the present invention will be described with reference to FIG. 6 and FIG. In the second embodiment, after the door closing operation is temporarily stopped, the reopening operation is immediately performed for a predetermined distance from the fully opened position of the door.

  In the flowchart of FIG. 7, first, in FIG. 6, it is assumed that the door starts to close from the fully open position (step S10). If there are no obstacles, the closing operation proceeds normally and the door moves to the fully closed position. However, for example, if a passenger's luggage hits one of the safety shoes 14a, 14b, the mechanical safety device operates. The operation of the mechanical safety device is detected by the ON signals of the switches 15a and 15b (step S11: yes), and the door opening / closing control device 13 fully opens the door (step S12).

  On the other hand, when there is an obstacle 50 such as a passenger's body or luggage between the doors to be closed and the obstacles 50 are not in contact with the safety shoes 14a and 14b, the door closing operation is performed. While the mechanical safety device does not operate, the non-contact sensors 20a, 20b react. As a result, the door opening / closing control device 13 detects the presence of an obstacle based on the obstacle detection signal sent from the non-contact sensors 20a and 20b (yes in step S13). If it does so, it will progress to step S14 and the door opening / closing control apparatus 13 will stop a door closing operation once. At this time, if the door panels 10a and 10b are at the positions indicated by the alternate long and short dash line in FIG. 6, they are immediately reopened.

  The operation up to this point is the same as in the second embodiment, but in this third embodiment, the reference of the constant distance for reopening is taken as the fully open position, and the reopen is performed from the fully open position to the position of distance B (step S15 ′). ). That is, the door opening is started from the position where the obstacle is detected, and the door opening operation is temporarily stopped when reaching the position at the predetermined distance B from the fully opened position (step S16 ').

  After the temporary stop, the process returns to step S10. Thereafter, in step S11 and step S12, the obstacle detection signals from the non-contact sensors 20a and 20b are monitored, and when there are no obstacles, the process proceeds to step S17 to restart the door closing operation. Thereafter, when there is no obstacle, the door is closed to the fully closed position.

  As described above, when the mechanical safety device is not in operation in the process of closing the door, a position separated by a predetermined distance B from the fully open position is detected when an obstacle detection signal is detected from the non-contact safety device. The door closes as soon as the obstacle is removed, so that the safety efficiency is not reduced by the operation of the safety device, ensuring both safety when opening and closing the door and operating efficiency. It becomes.

Fourth embodiment
Next, a fourth embodiment of the present invention will be described with reference to FIGS. In the fourth embodiment, as shown in FIG. 8, as the non-contact sensor, an upper non-contact sensor 30a, 30b and a lower non-contact sensor 32a, 32b are combined, and an obstacle is detected based on detection signals from these non-contact sensors. Is an embodiment in which the size of the reference is determined.

  First, assume that the door starts to close in step S20. If there are no obstacles, the closing operation proceeds normally and the door moves to the fully closed position. For example, if a passenger's luggage hits one of the safety shoes 14a and 14b, the mechanical safety device is activated. The operation of the mechanical safety device is detected by the ON signals of the switches 15a and 15b (step S21: yes), and the door opening / closing control device 13 fully opens the door (step S22).

  In contrast, for example, as shown in FIG. 8A, it is assumed that there is an obstacle 40 having a relatively low height between doors to be closed. When the obstacle 40 is not in contact with the safety shoes 14a and 14b, the upper non-contact sensors 30a and 30b among the upper and lower non-contact sensors do not react (no in step S23), but the lower non-contact. The direction sensors 32a and 32b react (yes in step S24). As a result, it progresses to step S22 and the door opening / closing control apparatus 13 is reopened to a full open position.

  On the other hand, as shown in FIG. 8B, when there is an obstacle 41 having a height, the upper non-contact sensors 30a and 3ob among the upper and lower non-contact sensors react ( In step S23, the process proceeds to step S25, where the door closing operation is temporarily stopped. After the temporary stop, the process returns to step S21. Thereafter, in steps S21 to S23, the obstacle detection signals from the upper non-contact sensors 30a and 30b are monitored, and when there are no obstacles, the process proceeds to step S26 to restart the door closing operation. Thereafter, when there is no obstacle, the door is closed to the fully closed position.

  As described above, even when the mechanical safety device is not operating in the process of closing the door, if a small obstacle is detected by determining the size of the obstacle, Because it is fully opened, safety for children and the like can be improved. In the case of a large obstacle, the door closes as soon as the obstacle is removed after the temporary stop, ensuring the safety when opening and closing the door without compromising the operation efficiency due to the operation of the safety device. Can be achieved.

Fifth embodiment
Next, a fifth embodiment of the present invention will be described with reference to FIGS. The first to fourth embodiments described above are embodiments in which a two-dimensional displacement sensor is used as a non-contact type sensor. In the fifth embodiment, a three-dimensional displacement sensor is used as the non-contact type sensors 40a and 40b. Used. Then, as shown in FIG. 11, by setting a plurality of non-contact sensors 40a, 40b made of a three-dimensional displacement sensor in the vertical direction of the door panels 10a, 10b, the detection range is set so as to project to the landing side. Therefore, it is possible to further improve safety for persons with disabilities who take a long time to get on and off, and passengers who jump in.

  Note that when the above three-dimensional displacement sensor is used, the opening / closing of the door may be controlled by applying any of the flowcharts of the first to third embodiments.

The figure which shows the door of the elevator by 1st Embodiment of this invention. The flowchart of the door opening / closing control of 1st Embodiment of this invention. The flowchart by the modification of the flowchart of FIG. The figure which shows the door of the elevator by 2nd Embodiment of this invention. The flowchart of the door opening / closing control by 2nd Embodiment of this invention. The figure which shows the door of the elevator by 3rd Embodiment of this invention. The flowchart of the door opening / closing control by 3rd Embodiment of this invention. The figure which shows the door of the elevator by 4th Embodiment of this invention. The flowchart of the door opening / closing control by 4th Embodiment of this invention. The top view which shows the door of the elevator by 5th Embodiment of this invention. The perspective view which shows the door of the elevator by 4th Embodiment of this invention.

Explanation of symbols

10a, 10b Elevator door 12 Door drive device 13 Door opening / closing control device 14a, 14b Safety shoe 20a, 20b Non-contact sensor

Claims (10)

In the elevator door control device that appropriately controls the opening / closing operation of the door drive unit while detecting obstacles such as passengers and luggage between the doors when the elevator door is closed,
A mechanical safety device that is operated by mechanical contact with the obstacle and that generates an operation signal for fully opening the door;
A non-contact type safety device having a non-contact type sensor for detecting the obstacle existing between the door end portions of the door;
On the condition that the mechanical safety device does not operate during the door closing operation and the obstacle detection signal is detected from the sensor part of the non-contact safety device, a temporary stop means for temporarily stopping the door closing operation,
After the temporary stop, while the mechanical safety device is not operating, the obstacle detection signal from the sensor unit of the non-contact safety device is monitored, and the door closing operation is performed on condition that the detection of the obstacle detection signal is lost Reopening means for resuming,
An elevator door control device comprising:   2. The elevator door control device according to claim 1, wherein the door closing restarting unit continues the door temporary stopping state after the door closing operation is temporarily stopped.   The door closing restarting unit temporarily stops the door closing operation and immediately performs a reopening operation for a predetermined distance from the obstacle detection position, and thereafter, the obstacle detection signal from the sensor unit of the non-contact safety device is monitored. 3. The elevator door control device according to claim 2, wherein the door is temporarily stopped at a position at the end of the reopening operation during the operation.   The door closing resumption means temporarily stops the door closing operation, immediately performs a reopening operation from the fully opened position of the door to a position closed by a predetermined distance, and then detects an obstacle from the sensor unit of the non-contact safety device. The elevator door control device according to claim 2, wherein the door is temporarily stopped at a position at the end of the reopening operation while the signal is monitored.   After the door closing operation is temporarily stopped, the door closing restarting unit performs a reopening operation from the door temporary stop position to the fully open position, and thereafter, an obstacle detection signal from the sensor unit of the non-contact safety device is monitored. The elevator door control device according to claim 2, wherein the door is temporarily stopped at the fully open position.   The elevator door control device according to claim 1, wherein the sensor unit of the non-contact safety device includes a plurality of displacement sensors arranged in a height direction.   The elevator door control device according to claim 1, wherein the sensor unit of the non-contact safety device includes a three-dimensional displacement sensor. Means for determining the size of an obstacle based on detection signals from the plurality of displacement sensors, and the door closing restart means performs a reopening operation when it is determined that the obstacle is small. The elevator door control device according to claim 6. When the obstacle detection signal is detected, instead of temporarily stopping the door closing operation , the door closing speed is reduced, and when the door closing operation is resumed, there is a speed change means for returning the door closing speed to the original speed. The elevator door control device according to any one of claims 1 to 5, characterized in that:   The elevator door control device according to any one of claims 1 to 5, further comprising announcement means for prompting the user to leave the vicinity of the door when the obstacle detection signal is detected.

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