JP3336840B2 - Elevator door safety devices - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety device for an elevator door, and more particularly to detection of a foreign object when a foreign object is present between the safety shoe and the door.

[0002]

2. Description of the Related Art FIG. 8 is a front view showing a schematic structure of a conventional safety device for an elevator door, in which 1 is an entrance, 2 is an elevator shaft, 3 is a threshold, 4 is an elevator door, and 5 is an elevator door. Is a rail for guiding the door, 6 is a safety shoe arranged along the edge of the door 4 on the door closing direction side and mounted so as to be able to move forward and backward, and 6b is sandwiched between the safety shoe 6 and the door 4 by, for example, a user. Reference numeral 7 denotes a parallel link connected to the safety shoe 6, reference numeral 8 denotes a switch that operates when the safety shoe 6 is displaced backward, and reference numeral 9 denotes a mounting plate on which the parallel link 7 is mounted. FIG. 9 is a cross-sectional view taken along the line CC of the safety device for the elevator door of FIG. 8, and shows a state in which the inclusion 6b is pushed into the gap between the door 4 and the safety shoe.

Next, the operation will be described. The structure of the above-mentioned elevator door device is the same as that of a well-known one,
When the elevator user presses the safety shoe 6 when the door is closed, the switch 8 is operated, the door 4 is turned over, and when the elevator door is closed, the safety is secured when the user is pinched. It is.

[0004]

The conventional safety device for an elevator door is constructed as described above. At this time, the elevator is used by mischief of an elevator user or by newspaper, milk delivery, moving or the like. At this time, if an object such as a corrugated cardboard or a piece of wood is pushed into the gap between the door 4 and the safety shoe 6 at a position where the safety shoe 6 is retracted so that the door 4 does not close, the door 4 continues to be fully opened, and the elevator is stopped. Unable to start, elevators become unusable,
It becomes in a state where other users cannot use it. For this reason, there is a possibility that a maintenance worker will be dispatched to remove the inclusions and return the elevator to normal operation, or that the inclusions will fall off and fall into the elevator hoistway, causing equipment failure of the elevator. There was such a problem.

[0005] The present invention has been made to solve the above problems, and an object of the present invention is to prevent an elevator from being disabled.

[0006]

[0007]

[0008]

[0009]

SUMMARY OF THE INVENTION An elevator according to the present invention is provided.
The safety device for the data door has at least one pair of links whose one end is rotatably supported by the door, and rotatably supports the other end of the link, and extends along the edge of the door in the closing direction. Normally, the safety shoe is arranged so that one end thereof protrudes from the door, and retreats by pressing force, and the door operates when the safety shoe retreats by a first predetermined distance with respect to the door during the closing operation of the door. First safety shoe displacement detecting means for outputting a signal for opening the door, and a signal which operates when the safety shoe retreats from the door by a second predetermined distance beyond a first predetermined distance. A second safety shoe displacement detecting means for detecting the presence of foreign matter between the door and the safety shoe;
The safety shoe displacement detecting means outputs a signal, and the foreign matter detecting means issues a warning when the foreign matter detecting means detects a foreign matter.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Hereinafter, a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view showing a schematic structure of an elevator door safety device according to Embodiment 1 of the present invention.
The same reference numerals as those in FIG. 8 denote the same or corresponding parts, and a description thereof will not be repeated. In FIG. 1, reference numeral 6b denotes an intervening object which is inserted between the door 4 and the safety shoe 6 by scissors, for example, as shown in FIG. Then, the first switch (first displacement detecting means) 11 that operates is the safety shoe 6.
The safety link 6 is pressed to actuate the end of the parallel link 11 longer than the first predetermined distance, and an alarm is issued when a certain period of time elapses. The second switch (second
Displacement detection means).

FIG. 2 is a flowchart showing the operation of the above-described elevator door safety device. In the figure,
In step S22, the door 4 starts closing. Step S
When the safety shoe 6 is pressed by the user to the position where the first switch 8 operates at 23 and the safety shoe 6 is pressed to the position where the second switch 12 operates at step S25, the door 4 is also inverted at step S27. Open doors. Further, if the second switch 12 is operated in step S27, the process proceeds to step S28, and after a certain time (for example, one minute or more) has elapsed, an alarm is issued by an alarm means (not shown) in S29. If the safety shoe 6 on which the second switch 12 operates after S23 is not pressed, the door 4 is opened in S26 and the process returns to S21. Note that S
When the first switch 8 is operated at 23 to output the signal, the first switch 8 is operated at S25 unless the second switch is operated.
In response to the operation signal of the switch 8, the door 4 is opened in S26. Further, when the second switch 12 operates and outputs the signal in S25, the door 4 is opened in reverse in S27, and when a predetermined time or more has passed after the signal is output, an alarm is issued to notify the elevator stoppage by the alarm means. .

FIG. 3 shows an example of the amount of movement when the safety shoe 6 moves backward. The operation position of the first switch 8 is 20 mm from the position before the operation of the safety shoe 6.
This is defined as a first movement amount (first predetermined distance), and the operating position of the second switch 12 is long when the safety shoe 6 is retracted by pressing with the inclusion 6b, The distance from the operation position of the first switch 8 was set to 20 mm, which was defined as a second movement amount (a second movement distance obtained by adding the first movement amount to the second movement amount).

In the safety device for an elevator door constructed as described above, when the elevator user touches the safety shoe 6 and presses the safety shoe 6, the first
When the switch 8 is operated, the door 4 is inverted. Next, when the inclusion 6b is pushed into the gap between the door 4 and the safety shoe 6 by a user's mischief so that the door 4 does not close, the second switch is generally used because the safety shoe 6 is pushed deeply. 12 operates. If this state exceeds a certain time (for example, one minute), it is determined to be a mischief, and a warning is sent to a required place such as an elevator management department.

1, 10 and 10a are located at the upper and lower portions of the door 4, and sense that the light beam 10b passing vertically between the door 4 and the safety shoe 6 is interrupted and detect the inclusions 6b. This is a sensor (foreign matter detecting means) for detecting the scissors of the object. FIG. 4 is a flowchart showing the operation of the elevator door safety device provided with the above-described foreign object detecting means. In the figure, steps S41 to S47
Is the same flow as S21 to S27 in FIG. 2 described above, and the description is omitted. In step S48, when the second switch 12 is operated, and the sensors 10 and 10a detect the scissors of the inclusion 6b, an alarm is issued by the alarm unit. If the sensors 10 and 10a do not operate, an alarm is issued after a lapse of a predetermined time in step S29.

FIG. 5 has a mechanism similar to that of the safety device of FIG. 1, and 13 is a cross-sectional view of the safety device of FIG. As shown in FIG. 6, the bracket is fixed to the back surface of the door 4 and prevents a malfunction of the elevator due to falling of an inclusion from a gap between the door 4 and the safety shoe 6. Further, 6a shown in FIG. 7 which is a sectional view taken along the line AA of the safety device of FIG. 1 has an S-shaped safety shoe itself in order to prevent scissors of inclusions in advance.

As described above, since the second switch is provided when the user pushes the inclusion into the gap between the door and the safety shoe, it is more likely that the cause of the alarm is caused by the inclusion. It is easy to perform, and it is possible to take a measure to quickly restart the operation of the elevator, and it is possible to prevent a recurrence of an act of pushing an inclusion by an alarm.

Further, the provision of the member 6a for preventing foreign matter from intervening in the gap between the door 4 and the safety shoe 6 allows a foreign matter having a simple shape to be pushed into the gap between the door 4 and the safety shoe 6. And the number of stoppages due to inclusions in the elevator is greatly reduced.

When a user pushes an intervening object into the gap between the door 4 and the safety shoe 6, the foreign matter detecting means 1
0, 10a, so that it is possible to determine that the alarm is caused by an inclusion and take measures to restart the elevator operation more quickly, and to push the inclusion by the alarm. Recurrence can be prevented.

Further, the stopper for preventing foreign matter intrusion or the contact rod 6a itself has an S-shape, and the inclusions enter the door pocket side too much and fall into the elevator hoistway, and are installed in the hoistway. It is possible to prevent a malfunction such as operating a safety switch or the like.

[0020]

[0021]

[0022]

[0023]

As described above, according to the present invention, at least one pair of links whose one end is rotatably supported by the door, and the other end of this link are rotatably supported, and the door is closed in the closing direction. A safety shoe that is usually arranged along the side edge so that one end protrudes from the door, and retreats by pressing force,
First safety shoe displacement detecting means for operating when the safety shoe retreats from the door by a first predetermined distance with respect to the door during the closing operation and outputting a signal for opening the door; A second signal which operates and outputs a signal when retracted a second predetermined distance beyond the first predetermined distance
Safety shoe displacement detecting means, foreign matter detecting means for detecting foreign matter interposed between the door and the safety shoe,
Since the second safety shoe displacement detecting means outputs a signal and the foreign matter detecting means has an alarming means for issuing an alarm when foreign matter is detected, the user pushes an intervening object into the gap between the door and the safety shoe. If you
Equipped with foreign object detection means, it is possible to determine that the cause of the alarm is due to inclusions, take measures to restart the elevator operation more quickly, and act to push the inclusions by alarm It has an educational effect to prevent the recurrence.

[Brief description of the drawings]

FIG. 1 is a schematic front view showing an elevator door safety device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing an operation of the elevator door safety device according to the first embodiment of the present invention.

FIG. 3 is a view showing a movement amount of a safety shoe of the safety device for the elevator door of FIG. 1;

FIG. 4 is a flowchart showing another example of the operation of the elevator door safety device according to Embodiment 1 of the present invention.

FIG. 5 is another example of an elevator door safety device according to Embodiment 1 of the present invention.

FIG. 6 is a sectional view taken along line BB of the safety device for the elevator door of FIG. 5;

FIG. 7 is a sectional view taken along line AA of the safety device for the elevator door of FIG. 1;

FIG. 8 is a schematic front view showing a conventional safety device for an elevator door.

9 is a cross-sectional view of the safety device for the elevator door of FIG. 8 taken along line CC.

[Explanation of symbols]

1 entrance, 2 hoistways, 3 sills, 4 doors, 5 rails, 6 safety shoes, 6a S-type safety shoes, 6b, inclusions, 7 links, 8 first switches,
9 mounting plate, 10 sensor (light emitter), 10a sensor (light receiver), 10b light beam trajectory, 11 link (end cam shape), 12 second switch, 13 bracket.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-52-121247 (JP, A) JP-B7-110752 (JP, B2) JP-B-53-28690 (JP, B1) JP-B-7-107 106867 (JP, B2) JK 7-47427 (JP, Y2) (58) Field surveyed (Int. Cl. ⁷ , DB name) B66B 13/00-13/30

Claims (1)

(57) [Claims] At least one pair of links, one end of which is rotatably supported by a door, and the other end of the link is rotatably supported, and one end is usually provided along an edge of the door in a closing direction. A safety shoe that is disposed so as to protrude from the door and retreats by a pressing force; and a door that operates when the safety shoe retreats by a first predetermined distance with respect to the door during the closing operation of the door. First safety shoe displacement detecting means for outputting a signal for opening, and operating and outputting a signal when the safety shoe retreats from the door by a second predetermined distance beyond a first predetermined distance. A second safety shoe displacement detecting means for detecting foreign matter interposed between the door and the safety shoe; a second safety shoe displacement detecting means for outputting a signal; A safety device for an elevator door, comprising: warning means for issuing a warning when a step detects foreign matter.