JP2010058873A - Door safety device for elevator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door safety device for an elevator, reduced in cost and saved in space, while preventing the deterioration of a cable extending from a detection means for detecting the operation of a safety shoe. <P>SOLUTION: A wire 12 is tensioned in the door opening-closing direction in a position for abutting on the safety shoe 8 displaced upward while retreating from a steady resting position to a car side door 4, and a detection switch 13 for performing detecting operation in response to tension of its wire 12, is fixed to a car body 2. When the safety shoe 8 is displaced upward while retreating from the steady resting position, the tension of its wire 12 increases when its safety shoe 8 pushes up the wire 12, and the detection switch performs the detection operation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to an elevator door safety device that prevents foreign objects from being caught in a sliding door that opens and closes a car doorway, and in particular, by detecting a detecting means for detecting the operation of a safety shoe to the car body, the detection is performed. The present invention relates to an elevator door safety device that suppresses deterioration of a cable for guiding the output of a means to an opening / closing control device that controls door opening / closing control.

As this type of elevator door safety device, for example, one disclosed in Patent Document 1 has been proposed. In the elevator door safety device described in Patent Document 1, a safety shoe is attached to the end of the car door in the door closing direction via a pair of link members, and is fixed to the car body above the safety shoe. Further, a presser bar which can be moved up and down is disposed between the switch and the safety shoe along the door opening / closing direction. In other words, by fixing the switch to the car body, the cable for guiding the output of the switch to the opening / closing control device that controls the door opening / closing control is not bent and extended with the door opening / closing operation, and the cable is deteriorated. It can be suppressed. And, when the safety shoe is pushed in by a foreign object such as a passenger's baggage during the door closing operation, the safety shoe is displaced upward by the rotation of the both link members, and the presser bar is pushed up, The switch is pressed by a presser bar, and the opening / closing control device reverses the moving direction of the car door and opens the door with an operation signal of the switch.
JP-A-57-107389

  However, since the elevator door safety device described in Patent Document 1 requires a mechanism for moving the presser bar up and down, the structure becomes complicated and disadvantageous in terms of cost. It becomes difficult to secure.

  The present invention has been made in view of the problems as described above, and an object of the present invention is to provide an elevator door safety device that achieves cost reduction and space saving while preventing cable deterioration.

  According to the first and second aspects of the present invention, a safety shoe capable of moving forward and backward relative to the sliding door in the door opening / closing direction is provided at the door closing direction side end of the sliding door that opens and closes the doorway of the car. In addition, the safety shoe is displaced upward as it retracts from the stationary stationary position with respect to the sliding door toward the door opening direction, and the safety shoe moves relative to the sliding door during the door closing operation. This is based on the assumption that the door safety device is an elevator door that is opened by a detecting means fixed to the car body when it is displaced upward while retreating.

  On the other hand, in the invention described in claim 1, the cord-like body is stretched along the door opening / closing direction at a position where the cord-like body is in contact with the safety shoe displaced upward from the stationary stationary position. While the detection means is configured to perform a detection operation when bent upward with contact with the safety shoe, the invention according to claim 2 is displaced upward from a stationary stationary position. A pressure sensitive sensor as the detecting means is disposed along the door opening / closing direction at a position in contact with the safety shoe.

  Specifically, as described in claim 3, when the cord-like body or the pressure-sensitive sensor is disposed over the entire movement locus in the door opening / closing direction above the movement locus of the safety shoe accompanying the door opening / closing operation. Good.

  According to the first and second aspects of the present invention, when the foreign matter comes into contact with the safety shoe during the door closing operation and the safety shoe is pushed back by the foreign matter, the safety shoe is displaced upward along with the backward movement. It comes into contact with the cord or pressure sensor. As a result, in the invention described in claim 1, the detection means is operated by the cord-like body being bent upward, while in the invention described in claim 2, pressure is applied to the pressure-sensitive sensor. Since the output changes, the sliding door is opened with this, thereby preventing the foreign matter from being caught in the sliding door.

  More preferably, as in the invention described in claim 4, when a cover member covering the cable-like body or the pressure-sensitive sensor is provided above the cable-like body or the pressure-sensitive sensor, There is an advantage that the body or the pressure sensitive sensor is protected from a falling object from above, and the malfunction caused by the falling object coming into contact with the cord-like body or the pressure sensitive sensor can be prevented.

  According to at least the first and second aspects of the present invention, the operation of the safety shoe can be detected by an extremely simple structure in which the cord-like body or the pressure-sensitive sensor is arranged along the door opening / closing direction. This is advantageous in terms of space saving because it can be installed in a small space.

  1 and 2 show an elevator door safety device as a more specific first embodiment of the present invention. FIG. 1 is a front view of a car in a fully closed state, and FIG. 2 is a state in which a door is fully opened. It is a front view of a cage.

  As shown in FIGS. 1 and 2, the car body 2 of the car 1 of the elevator apparatus has a car-side doorway 3 through which a passenger enters and exits the car 1. The door opening / closing type of the car side entrance / exit 3 is a so-called double door double opening type, and the car side entrance / exit 3 is opened and closed by a pair of left and right sliding door car side doors 4, 5.

  Both the car-side doors 4 and 5 are constituted by door panels 4a and 5a, which are door bodies, and door hangers 4b and 5b attached to the upper edges of the door panels 4a and 5a, respectively. As is well known, the door hangers 4b and 5b of the car-side doors 4 and 5 are respectively suspended from door rails 6 provided above the car-side entrance 2 via door rollers (not shown). The car doors 4 and 5 are opened and closed by the door machine. More specifically, the car-side doorway 2 is opened and closed by slidingly displacing the car-side doors 4 and 5 toward and away from each other. The door hanger 4b of the car side door 4 on the left side of the car side doors 4 and 5 is provided with an engaging member 7 for interlocking the landing side door (not shown) with the car side doors 4 and 5. It has been.

  A safety shoe 8 extending in the vertical direction is provided at an end of the car-side door 4 on the left side in the figure among the car-side doors 4 and 5. One end of a pair of link members 9 is rotatably connected to the safety shoe 8 in the vertical direction with pins 10, while the other ends of both link members 9 are fixed to the door panel 4 a. Each of the base plates 11 is rotatably connected with a pin 10. In this way, by connecting the safety shoe 8 to the car-side door 4 via the both link members 9, a so-called parallel link mechanism using the car-side door 4 as a fixed node is configured, and the safety shoe 8 is connected to the car-side door 4. On the other hand, it can move forward and backward in the door opening and closing direction. Further, both link members 9 are provided in an inclined posture so as to be directed obliquely upward toward the safety shoe 8 side, and the safety shoe 8 moves backward relative to the car-side door 4 in the door closing direction. The safety shoe 8 is displaced upward by the rotation of the link members 9 along with this. The safety shoe 8 is always held at a stationary stationary position that protrudes a predetermined amount from the front end of the car-side door 4 in the door closing direction.

  On the other hand, above the movement trajectory of the safety shoe 8 accompanying the door opening / closing operation of the car-side door 4, a wire 12 that is a non-stretchable cord-like body is stretched with a predetermined tension over the entire movement trajectory in the door opening / closing direction. Thus, when the safety shoe 8 is displaced upward while moving backward with respect to the car-side door 4, the wire 12 is pushed up in contact with the safety shoe 8. One end of the wire 12 is locked to a locking member 17 fixed to the middle portion of the door opening / closing direction in the upper edge of the car body 2, while the other end of the wire 12 is connected to the car body 2. It is connected with the detection switch 13 which is a detection means fixed to the left edge part in FIGS. Furthermore, the wire 12 is covered from above by a cover member 14 for protecting the wire 12 from falling objects, and the cover member 14 does not come into contact with the wire 12 pushed up by contact with the safety shoe 8. Is set to

  When the wire 12 is bent upward due to contact with the safety shoe 8, the detection switch 13 performs a detection operation based on a change in tension of the wire 12 and outputs an alarm signal. 15 is connected to an open / close control device 16 for controlling 15 via an electric cable (not shown). In this way, by attaching the detection switch 13 to the car body 2, even if the car-side doors 4 and 5 are opened and closed, the electric cable does not bend and extend, and deterioration of the electric cable is suppressed. . Here, as the detection switch 13, a mechanical switch including a fixed contact and a movable contact that is displaced in accordance with the tension of the wire 12 in a direction in which the detection switch 13 contacts and separates from the fixed contact may be used. In addition, a tension sensor whose output changes according to the tension of the wire 12 may be provided, and a switching operation may be performed according to the output of the tension sensor to output an alarm signal.

  FIG. 3 is a view showing a state in which the safety shoe 8 is retracted with respect to the car-side door 4.

  In the elevator door safety device configured as described above, when the car side doors 4 and 5 are closed from the fully opened state of the car side doorway 3, the safety shoe 8 is used when no foreign matter is present in the car side doorway 3. Is moved together with the car-side door 4 with a predetermined distance from the wire 12, and the detection switch 13 does not perform the detection operation.

  On the other hand, when the car doors 4 and 5 are closed when foreign matter is present at the car side entrance 3 and the foreign matter comes into contact with the safety shoe 8, as shown in FIG. The safety shoe 8 is pushed in and retreated, and the upper end portion of the safety shoe 8 displaced upward with the retraction comes into contact with the wire 12 and pushes up the wire 12. When the safety shoe 8 pushes up the wire 12 in this way, the wire 12 bends upward to soften the impact based on the contact with the safety shoe 8, and at the same time, the tension of the wire 12 increases and the detection switch 13 detects. Then, an alarm signal is output to the opening / closing control device 16. Thereby, the door controller 15 is driven and controlled so that the opening / closing control device 16 reverses the moving direction of the car-side doors 4 and 5 to open the door, and foreign matter is caught between the car-side doors 4 and 5. Will prevent.

  Therefore, according to the present embodiment, the operation of the safety shoe 8 has an extremely simple structure in which the wire 12 is stretched above the safety shoe 8 and the detection switch 13 that operates according to the tension of the wire 12 is provided. In addition to being advantageous in terms of cost, it can be installed in a small space, which is advantageous for space saving.

  In addition, since the impact when the safety shoe 8 comes into contact with the wire 12 is buffered by the bending of the wire 12, it is possible to reduce the load applied to the foreign matter that has come into contact with the safety shoe 8, and between the safety shoe 8 and the wire 12. There is an advantage that the collision sound can be reduced.

  Furthermore, since the upper part of the wire 12 is covered with the cover member 14, there is a merit that a malfunction caused by falling objects coming into contact with the wire 12 can be prevented.

  FIG. 4 is a diagram showing an elevator door safety device as a modification of the first embodiment described above, and is a front view of the car 1. In FIG. 4, the same reference numerals are given to portions common to FIGS.

  In the modification shown in FIG. 4, safety shoes 8 are provided on the car-side doors 4 and 5, and the doors are opened and closed above the movement trajectory of the safety shoes 8 when the doors 4 and 5 are opened and closed. A single wire 18 is arranged as a cord-like body over the entire region of the movement locus in the direction, and the wire 18 is covered from above by a cover member 19 as in the first embodiment described above. Yes. That is, in this modification, when at least one of the safety shoes 8 is retracted, the wire 18 is pushed up by the safety shoe 8 and the detection switch 13 is detected.

  Therefore, according to this modification, the same effects as those of the first embodiment described above can be obtained, and the operations of both safety shoes 8 can be detected by a single detection switch 13. The safety shoes 8 are provided on the car-side doors 4 and 5 to increase the safety of the elevator, while the cost can be suppressed.

  FIG. 5 is a diagram showing a second embodiment of the present invention. In FIG. 5, the same reference numerals are given to portions common to FIGS.

  The second embodiment shown in FIG. 5 replaces the wire 12 and the detection switch 13 in the first embodiment described above, and has a flexible and non-stretchable cord-like or belt-like pressure sensor. 20 is provided as detection means at the same position as the wire 12 in the first embodiment described above. Both ends of the pressure sensor 20 are locked by a pair of locking members 21 fixed to the car body 2, and a signal corresponding to the pressure applied to the pressure sensor 20 is not shown. It outputs to the opening / closing control apparatus 22 via an electric cable.

  The opening / closing control device 22 includes a comparison / determination unit 22a that determines whether or not the pressure applied to the pressure-sensitive sensor 20 exceeds a predetermined set pressure, and an opening / closing control unit 22b that controls the door motor 15. The comparison / determination unit 22a outputs an alarm signal to the open / close control unit 22b when the pressure applied to the pressure-sensitive sensor 20 exceeds the set pressure.

  FIG. 6 is a view showing a state in which the safety shoe 8 is retracted with respect to the car-side door 4.

  Therefore, in the second embodiment, when the car-side doors 4 and 5 are closed from the state where the car-side doorway 3 is fully opened, if there is no foreign matter in the car-side doorway 3, the first described above. As in the embodiment, the safety shoe 8 does not contact the pressure sensor 20, and the comparison / determination unit 22a does not output an alarm signal.

  On the other hand, when the car-side doors 4 and 5 are closed while foreign matter is present at the car-side entrance 3 and the foreign matter comes into contact with the safety shoe 8, the same as in the first embodiment described above. In addition, as shown in FIG. 6, the upper end of the safety shoe 8 comes into contact with the pressure sensor 20 and pushes up the pressure sensor 20. When pressure is applied to the pressure-sensitive sensor 20 by such pressing by the safety shoe 8, and the pressure exceeds the set pressure, an alarm signal is output from the comparison determination unit 22a to the open / close control unit 22b. Thereafter, as in the first embodiment described above, the door motor 15 is driven and controlled so that the opening / closing controller 22a reverses the moving direction of the car doors 4 and 5 and opens the door.

  Therefore, also in the second embodiment, the same effect as that of the first embodiment described above can be obtained.

It is a figure which shows the 1st Embodiment of this invention, Comprising: The front view of the cage | basket of an entrance / exit fully closed state. The figure which shows the state which fully opened the cage | basket side doorway shown in FIG. The figure which shows the state which the safety shoe shown in FIG. 1 retracted. The figure which shows the modification of 1st Embodiment. It is a figure which shows the 2nd Embodiment of this invention, Comprising: The front view of the cage | basket of an entrance / exit fully closed state. The figure which shows the state which the safety shoe shown in FIG. 5 retracted.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Car 2 ... Car main body 3 ... Car side doorway 4 ... Car side door (sliding door)
8 ... Safety shoe 12 ... Wire (cord)
13: Detection switch (detection means)
14 ... Cover member 18 ... Wire (cord)
19 ... cover member 20 ... pressure sensor (detection means)

Claims (4)

A safety shoe capable of moving forward and backward relative to the sliding door in the door opening / closing direction is provided at the end of the sliding door that opens and closes the door of the car. When the safety shoe is displaced upward while retreating with respect to the slide door during the door closing operation, when the safety shoe is displaced upward from the stationary stationary position with respect to the door opening direction side, In the elevator door safety device which detects this by the detection means fixed to the car body and opens the door,
A cord-like body is stretched along the door opening and closing direction at a position where it abuts on the safety shoe displaced upward from the stationary stationary position, and the cord-like body bends upward upon contact with the safety shoe. An elevator door safety device characterized in that the detecting means is adapted to perform a detecting operation at that time. A safety shoe capable of moving forward and backward relative to the sliding door in the door opening / closing direction is provided at the end of the sliding door that opens and closes the door of the car. When the safety shoe is displaced upward while retreating with respect to the slide door during the door closing operation, when the safety shoe is displaced upward from the stationary stationary position with respect to the door opening direction side, In the elevator door safety device which detects this by the detection means fixed to the car body and opens the door,
An elevator door safety device, wherein a pressure-sensitive sensor as a detecting means is disposed along a door opening / closing direction at a position where it abuts on a safety shoe displaced upward from a stationary stationary position.   3. The cable-like body or the pressure-sensitive sensor is disposed over the entire movement locus in the door opening / closing direction above the movement locus of the safety shoe accompanying the door opening / closing operation. The elevator door safety device described.   The elevator door safety device according to any one of claims 1 to 3, wherein a cover member that covers the cable-like body or the pressure-sensitive sensor is provided above the cable-like body or the pressure-sensitive sensor. .

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