JPH09165175A - Safety device for elevator door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent an elevator from getting out of use by sounding an alarm upon the lapse of fixed time after a safety shoe retreats by the specified distance. SOLUTION: The acting position of a first switch 8 at the time of a safety shoe 6 retreating is to be 20mm from the position of a safety shoe 6 before actuation, and the acting position of a second switch 12 is to be further 20mm from the acting position of the first switch 8 in the case of the safety shoe 6 retreating being pressed by an intervention material 6b. Accordingly, when an elevator user touches the safety shoe 6 and presses the safety shoe 6, a door 4 is reversed by the action of the first switch 8. In the case of the intervention material 6b being pushed into clearance between the door 4 and the safety shoe 6 by the mischief of a user so that the door is not closed, the safety shoe 6 is generally pushed in deep, and the second switch 12 is actuated. Upon exceeding a certain fixed time, it is judged as a mischief and communicated to a required place by an alarm means.

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 substance when a foreign substance 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 the figure, 1 is an entrance / exit, 2 is an elevator hoistway, 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 which is arranged along the edge of the door 4 on the door closing direction side and is 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. 7 is a parallel link connected to the safety shoe 6, 8 is a switch that operates when the safety shoe 6 is displaced backward, and 9 is a mounting plate on which the parallel link 7 is mounted. FIG. 9 is a cross-sectional view of the elevator door safety device of FIG. 8 taken along the line CC, showing 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 elevator door device described above is the same as the well-known structure,
When the elevator user presses the safety shoe 6 when the door is closed, the switch 8 operates to invert the door 4 and close the elevator door to ensure safety when the user is pinched. There is.

[0004]

The conventional safety device for an elevator door is constructed as described above. At this time, however, the elevator is used by the mischief of the elevator user, or in newspapers, milk delivery, moving, etc. At this time, if an inclusion such as corrugated cardboard or wood chips is pushed into the clearance between the door 4 and the safety shoe 6 at the 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 I could not start, the elevator became unusable,
Other users cannot use it. For this reason, maintenance personnel may be dispatched to remove the inclusions to restore normal operation of the elevator, or the inclusions may fall off and fall into the elevator hoistway, causing equipment failure in the elevator. There was such a problem.

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

[0006]

An elevator door safety device according to the present invention includes at least a pair of links, one end of which is rotatably supported on the door, and the other end of which is rotatably supported. Normally, one end of the door is arranged so as to protrude from the door along the edge of the door in the closing direction, and the safety shoe is retracted by a pressing force. In a safety device for an elevator door configured to reverse and open the door when retracted a distance, an alarm is issued when the safety shoe retracts a predetermined distance and a predetermined time or more elapses.

Further, at least a pair of links, one end of which is rotatably supported by the door, and the other end of which is rotatably supported, and usually one end is provided along the edge of the door in the closing direction. A portion which is arranged so as to protrude from the door and is retracted by a pressing force; and a safety shoe which is operated when the safety shoe retracts a first predetermined distance with respect to the door during the closing operation of the door so that the door is a reversing door. A first safety shoe displacement detecting means for outputting a signal for opening, and a first safety output for operating when the safety shoe retracts a second predetermined distance beyond the first predetermined distance with respect to the door. When the second safety shoe displacement detecting means and the second safety shoe displacement detecting means output a signal and a predetermined time or more has passed,
And an alarm means for issuing an alarm.

In the gap between the door and the safety shoe,
It is provided with a member that prevents foreign matter from intervening.

Further, at least a pair of links, one end of which is rotatably supported by the door, and the other end of which is rotatably supported, and usually one end is provided along the edge of the door in the closing direction. The part is arranged so as to protrude from the door, and the safety shoe retracts due to the pressing force, and the safety shoe operates when retracting a first predetermined distance with respect to the door during the closing operation of the door to open the door. And a first safety shoe displacement detection means for outputting a signal for operating the safety shoe, and when the safety shoe has retracted a second predetermined distance beyond the first predetermined distance with respect to the door, the safety shoe operates and outputs a signal. The second safety shoe displacement detecting means, the foreign matter detecting means for detecting a foreign matter interposed between the door and the safety shoe, and the second safety shoe displacement detecting means output a signal and detect the foreign matter. Stage is that a warning means for issuing an alarm and detecting foreign objects.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. Embodiment 1 of the present invention will be described below with reference to the drawings. 1 is a side view showing a schematic structure of a safety device for an elevator door according to Embodiment 1 of the present invention.
The same reference numerals as those in FIG. 8 indicate the same or corresponding portions, and the description thereof will be omitted. In FIG. 1, reference numeral 6b denotes an inclusion that is scissored between the door 4 and the safety shoe 6 by a user, for example, as shown in FIG. Then, the first switch (first displacement detecting means) 11 that operates is the safety shoe 6
A parallel link having a cam-shaped end connected to the safety link 6 and operated by the end of the parallel link 11 longer than the first predetermined distance due to the safety shoe 6 being pressed. The second switch (second
Displacement detecting means).

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

FIG. 3 shows an example of the amount of movement when the safety shoe 6 is retracted. The operating position of the first switch 8 is 20 mm from the position before the safety shoe 6 is actuated.
This is the 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 being pushed by the inclusion 6b. It was further set to 20 mm from the operating position of the switch 8 of No. 1 and set as the second movement amount (the second movement amount is obtained by adding the first movement amount to the second movement amount).

In the elevator door safety device constructed as described above, when the elevator user touches the safety shoe 6 and presses the safety shoe 6, the first
The door 4 is inverted by operating the switch 8 of. Next, when the inclusion 6b is pushed into the gap between the door 4 and the safety shoe 6 by the user's mischief so that the door 4 does not close, the safety switch 6 is generally pushed deeply, so the second switch 12 works. If this state exceeds a certain time (for example, one minute), it is determined to be a mischief, and a necessary place such as an elevator management department is notified through an alarm means.

Further, reference numerals 10 and 10a shown in FIG. 1 are located at the upper and lower portions of the door 4, and are detected when the light beam 10b passing vertically between the door 4 and the safety shoe 6 is cut off. It is a sensor (foreign matter detection means) that detects the scissors. FIG. 4 is a flow chart showing the operation of the elevator door safety device equipped with the foreign matter detecting means. In the figure, steps S41 to S47
Is the same as the flow from S21 to S27 in FIG. In step S48, when the second switch 12 is actuated and the sensors 10 and 10a detect the inclusion of the inclusion 6b, the alarm means issues an alarm. Further, if the sensors 10 and 10a do not operate, an alarm is issued after a certain time has passed in step S29.

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

As described above, when the user pushes the inclusion into the gap between the door and the safety shoe, since the second switch is provided, it is more likely that the cause of the alarm is the inclusion. It is possible to easily carry out the procedure for restarting the elevator operation promptly and prevent the recurrence of the action of pushing the inclusion by the alarm.

Further, since a member 6a for preventing foreign matter from intervening is provided in the gap between the door 4 and the safety shoe 6, the foreign matter having a simple shape can be pushed into the gap between the door 4 and the safety shoe 6. The effect is that the number of operation stoppages due to inclusions in the elevator is significantly reduced.

When the user pushes an inclusion into the gap between the door 4 and the safety shoe 6, the foreign matter detecting means 1
Since 0 and 10a are provided, it is possible to conclude that the cause of the alarm is due to inclusions, and to take measures to restart the elevator operation more promptly, and also to push the inclusions due to the alarm. Can be prevented from recurring.

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

[0020]

As described above, according to the present invention, at least a pair of links, one end of which is rotatably supported by the door, and the other end of which is rotatably supported, are used to close the door. Normally, one end of the door is arranged so as to protrude from the door along the side edge, and it has a safety shoe that retracts due to the pressing force.When the safety shoe retracts a predetermined distance during the closing operation of the door, In a safety device for an elevator door that is configured to be opened upside down, when the safety shoe retracts a predetermined distance and a certain period of time elapses, an alarm is issued so that the user can intervene in the gap between the door and the safety shoe. If the alarm is pushed, the alarm can be used to promptly restart the operation of the elevator, and an educational effect to prevent the recurrence of the action of pushing the inclusion by the alarm. There is.

Further, at least a pair of links, one end of which is rotatably supported by the door, and the other end of which is rotatably supported, and usually one end portion is provided along the edge of the door in the closing direction. Is arranged so that it protrudes from the door and retracts due to the pressing force, and a signal for opening the door by operating when the safety shoe retracts a first predetermined distance with respect to the door while the door is closing. And a second safety shoe displacement detecting means for outputting a signal and operating when the safety shoe retracts a second predetermined distance beyond the first predetermined distance with respect to the door. Detection means,
Since the second safety shoe displacement detecting means outputs a signal and has an alarm means for issuing an alarm when a certain time or more has elapsed, the user pushes an inclusion into the gap between the door and the safety shoe. In such a case, since the second safety shoe displacement detection means is provided, it is easier to estimate that the cause of the alarm is due to inclusions, and the elevator operation is restarted promptly. In addition to being able to do so, it has an educational effect of preventing the recurrence of the action of pushing the inclusion by the alarm.

Further, in the gap between the door and the safety shoe,
By providing a member that prevents foreign matter from intervening, it becomes impossible to push a simple foreign matter into the gap between the door and the safety shoe, and the number of operation stoppages due to the inclusion of the elevator is greatly reduced. is there.

Further, at least a pair of links, one end of which is rotatably supported by the door, and the other end of which is rotatably supported, and usually one end portion is provided along the edge of the door in the closing direction. Is arranged so that it protrudes from the door and retracts due to the pressing force, and a signal for opening the door by operating when the safety shoe retracts a first predetermined distance with respect to the door while the door is closing. And a second safety shoe that outputs a signal by operating when the safety shoe retracts a second predetermined distance beyond the first predetermined distance with respect to the door. The displacement detection means, the foreign matter detection means for detecting foreign matter present between the door and the safety shoe, and the second safety shoe displacement detection means output a signal, and an alarm is issued when the foreign matter detection means detects a foreign matter. If the user pushes an inclusion in the gap between the door and the safety shoe, it is determined that the alarm is caused by the inclusion because the foreign matter detection means is provided. do it,
It is possible to take measures to restart the operation of the elevator more promptly, and there is an educational effect of preventing the recurrence of the action of pushing the inclusion by the alarm.

[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 the operation of the elevator door safety device according to the first embodiment of the present invention.

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

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

FIG. 5 is another example of the elevator door safety device according to the first embodiment of the present invention.

6 is a cross-sectional view taken along the line BB of the elevator door safety device of FIG.

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

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

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

[Explanation of symbols]

1 entrance / exit 2, 2 hoistway, 3 sill, 4 door, 5 rail, 6 safety shoe, 6a S-type safety shoe, 6b, inclusion, 7 link, 8 first switch,
9 mounting plate, 10 sensor (light emitter), 10a sensor (light receiver), 10b light beam trajectory, 11 link (end cam shape), 12 second switch, 13 metal fittings.

Claims (4)

[Claims] 1. A door including at least a pair of links, one end of which is rotatably supported, and the other end of which is rotatably supported. And a safety shoe which is arranged so as to protrude from the door and retracts by a pressing force.When the safety shoe retracts a predetermined distance during the closing operation of the door, the door is inverted and opened. In the safety device for an elevator door, the safety device for an elevator door is configured to issue an alarm when the safety shoe retracts a predetermined distance and a predetermined time or more elapses. 2. A door, at least one pair of which one end is rotatably supported, and the other end of which is rotatably supported, and usually one end along an edge of the door in the closing direction. A portion which is arranged so as to protrude from the door and is retracted by a pressing force; and a safety shoe which is operated when the safety shoe retracts a first predetermined distance with respect to the door during the closing operation of the door so that the door is a reversing door. First safety shoe displacement detecting means for outputting a signal for opening, and when the safety shoe retracts with respect to the door by a second predetermined distance beyond a first predetermined distance, it outputs a signal. Of the elevator door, comprising: a second safety shoe displacement detecting means for performing a warning; and a warning means for issuing a warning when the second safety shoe displacement detecting means outputs a signal and a predetermined time or more has elapsed. Safety gear Place. 3. The elevator door safety device according to claim 2, further comprising a member for preventing foreign matter from being present in a gap between the door and the safety shoe. 4. At least a pair of links whose one end is rotatably supported by a door, and the other end of which is rotatably supported, and usually one end along an edge of the door in the closing direction. A portion which is arranged so as to protrude from the door and is retracted by a pressing force; and a safety shoe which is operated when the safety shoe retracts a first predetermined distance with respect to the door during the closing operation of the door so that the door is a reversing door. First safety shoe displacement detecting means for outputting a signal for opening, and when the safety shoe retracts with respect to the door by a second predetermined distance beyond a first predetermined distance, it outputs a signal. The second safety shoe displacement detecting means, the foreign matter detecting means for detecting the foreign matter present between the door and the safety shoe, and the second safety shoe displacement detecting means for outputting a signal, and the foreign matter detecting hand. An elevator door safety device, comprising: alarm means for issuing an alarm when a step detects a foreign matter.