JP2000177958A - Car door safety device for elevator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the damaging of an apparatus likely to occur during inspection or rescuing even if a gap from a car door to the front end of a threshold is narrow, and to facilitate the wiring of a lead wire in an elevator car door safety device where a safety shoe and a safety switch are provided in the car door and the safety switch and a tool box on a car are electrically connected to each other via the lead wire. SOLUTION: An energizing sheet 21 is laid on a guide rail 9 along its longitudinal direction, and the other end of a first lead wire 22, one end thereof being connected to a safety switch 4, is slid into contact with the energizing sheet 21. In addition, the other end of a second lead wire 23, one end thereof being connected to the energizing sheet 21, is connected to a tool box 21 on a car. In a car door safety device thus constructed, since the necessity of wiring chain conventionally used for protecting the lead wire following the opening/closing operation of a car door 1 is eliminated, the damaging of the apparatus caused by the interference of the chain is prevented, and the time of laying the lead wire is shortened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a car door safety device for an elevator, which is equipped to prevent a passenger or luggage from being caught in the car door while the car door is closed.

[0002]

2. Description of the Related Art FIGS. 4 and 5 are views for explaining the prior art of an elevator car door safety device. FIG. 4 is a front view of the car door viewed from a landing side, and FIG. 5 is a car door shown in FIG. FIG. 3 is a plan view when viewed from above.

As shown in these figures, the conventional car door safety device includes a safety shoe 2, a lever 3, a safety switch 4, a lead wire 5 and the like on the back side of the car door 1 (the side facing the landing). And electrically connecting the safety switch 4 and the appliance box 12 on the car via the lead wire 5,
The configuration is such that the lead wire 5 is protected by the wiring chain 7 between the mounting brackets 6 and 8. The safety shoe 2 is arranged so as to protrude from the tip of the car door 1 in the door closing direction, and when a person or an object hits the door during the door closing operation and the pressing force acts on the safety shoe 2 in the door opening direction,
The safety shoe 2 retreats and moves relative to the car door 1 in the door opening direction. Then, the lever 3 rotates in conjunction with the retreating operation of the safety shoe 2, and the contact of the safety switch 4 is turned on by the rotating operation of the lever 3, so that the current flowing from the appliance box 12 is cut off.
A restart door signal for shifting the car door 1 from the closing operation to the opening operation is output. That is, when the safety switch 4 detects the retreating operation of the safety shoe 2 via the lever 3, a reopening door signal is output and the motor (not shown) of the car door opening / closing device is driven to open the car door 1. Since the door operation is performed, safety shoes 2
It is possible to reliably avoid an accident that a person or an object hit by the car is pushed and pinched by the car door 1.

Since the car door 1 is supported by a hanger 10 running along a guide rail 9 provided on the upper part of the car, the opening and closing operation of the car door 1 is smoothly performed while being guided by the guide rail 9. Done in The lead wire 5, one end of which is connected to the safety switch 4 and the other end of which is connected to the appliance box 12, are connected to the mounting bracket 6 mounted on the car door 1 and the mounting bracket 8 mounted on the guide rail mounting frame 11. Each of them is fixed and inserted and fixed to a wiring chain 7 connecting both mounting brackets 6 and 8, and the wiring chain 7 protects the lead wire 5 while following the opening and closing operation of the car door 1. are doing.

[0005]

In the conventional car door safety device described above, the width of the wiring chain 7 for protecting the lead wire 5 while following the opening and closing operation of the car door 1 is wide. As shown, there is no problem when the interval A from the car door 1 to the front end of the car threshold 13 is wide, but when the interval B from the car door 1 to the front end of the car threshold 13 is narrow as shown in FIG. Since the wiring chains 7 protrude from the car sill 13 to the landing side, the wiring chains 7 and the landing doors 14 have a close positional relationship. as a result,
Provided to allow the car door 1 and the landing door 14 to engage and interlock when the worker opens and closes the landing door 14 from the landing side during elevator inspection work or rescue work in the event of a confinement accident. There is a danger that the engaging roller 15 that is used will interfere with the wiring chain 7 and damage the chain 7 and the engaging roller 15. In addition, since it is not easy to insert and fix the lead wire 5 into the wiring chain 7 at the elevator installation site, there is a problem that much time is required for wiring the lead wire 5.

The present invention has been made in view of such deficiencies in the prior art, and an object of the present invention is to prevent equipment damage which is a concern at the time of inspection or rescue even when the distance from the car door to the front end of the car sill is narrow. An object of the present invention is to provide an elevator car door safety device which can be avoided and can easily perform a wiring work of a lead wire.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above-mentioned object, the present invention provides a car door which opens and closes by being guided by a guide rail provided on the upper part of a car. A safety shoe that is arranged to protrude and is capable of retreating to relatively move in the door opening direction,
The safety shoe is provided with a safety switch that outputs a restart door signal when the car performs the retreat operation when the car door is closed, and the safety switch and the instrument box provided on the car are connected to the safety switch. In an elevator car door safety device electrically connected via a wire, an electric-conductive sheet is laid on the guide rail along a longitudinal direction thereof, and the lead wire is connected at one end to the safety switch. The first lead wire has the other end slidably in contact with the conductive sheet, and the second lead wire has one end connected to the conductive sheet and the other end connected to the appliance box.

As described above, the first lead wire connected to the safety switch is slidably contacted with the current-carrying sheet laid on the guide rail, and the current-carrying sheet and the instrument box on the car are connected to the second lead wire. Since the car door safety device connected via the cable does not need to provide the wiring chain conventionally used to protect the lead wire while following the opening and closing operation of the car door, from the car door to the front end of the car threshold Even when the distance between the wiring chains is small, it is possible to avoid damage to the equipment due to interference between the wiring chain and the engaging rollers, and there is no need to insert and secure the wiring chain, so the wiring time for lead wires is large. Can be shortened to

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to FIG.
This will be described with reference to FIG. 1 is a front view of the car door provided with the car door safety device according to the present embodiment as viewed from the landing, FIG. 2 is a plan view of the car door shown in FIG. 1 from above, and FIG. 7 is an enlarged view of an essential part showing a part of FIG. 4A, and parts corresponding to those in FIGS.

1 to 3, a guide rail 9 provided at an upper part of a car for guiding the hanger 10 to travel.
The front surface of the non-metallic sheet 20 along its longitudinal direction
Is laid, and a current-carrying sheet 21 is laid on the surface of the non-metallic sheet 20. As a lead wire for electrically connecting the safety switch 4 and the appliance box 12 on the car, a first lead wire 22 having one end connected to the safety switch 4 and the other end slidingly contacting the energizing sheet 21. And a second lead wire 23 having one end connected to the conductive sheet 21 and the other end connected to the instrument box 12. That is, the safety switch 4 and the energizing sheet 21 are electrically connected via the first lead wire 22, and the first lead wire 22 follows the opening / closing operation of the car door 1 as shown in FIG. While being able to
The appliance box 12 and the conductive sheet 21 are electrically connected via the second lead wire 23.

The other structure and operation of the car door safety device according to the present embodiment are the same as those of the conventional example, and the safety door 2, the lever 3, the safety switch 4
When a person or an object hits during the door closing operation and a pressing force acts on the safety shoe 2 in the opening direction, the safety shoe 2 retreats and the safety shoe 2 moves relative to the car door 1 in the opening direction. The lever 3 rotates in conjunction with the backward movement of the safety shoe 2, and the contact of the safety switch 4 is turned on by the rotation of the lever 3. Then, when the contact of the safety switch 4 is turned on, the current flowing from the appliance box 12 is cut off and a restart door signal is output, so that the motor (not shown) of the car door opening / closing device is driven and the car door 1 is opened. The door opening operation is performed, so that an accident such as a person or an object hitting the safety shoe 2 being pushed and pinched by the car door 1 can be reliably avoided.

In the present embodiment, as described above, the other end of the first lead wire 22 whose one end is connected to the safety switch 4 is connected to the front surface of the guide rail 9 via the non-metallic sheet 20 through the conductive sheet. Since the sliding door 21 is slidably contacted, there is no need to provide a wiring chain conventionally used to protect the lead wires while following the opening / closing operation of the car door 1. Therefore, even when the distance B from the car door 1 to the front end of the car sill 13 is narrow, there is no concern that the wiring chain and the engaging roller may interfere with each other when opening and closing the landing door. That is, during an elevator inspection operation or a rescue operation in the event of a confinement accident, an operator may open and close the landing door from the landing side. Although there is a high risk of interference with the mating roller, the present embodiment does not require a wiring chain, so that damage to the device due to the interference can be avoided and work can be performed with peace of mind. Further, since it is not necessary to insert and fix the lead wires through the wiring chain as in the related art, the first and second lead wires 22 and 23 can be easily attached, and the wiring work at the elevator installation site can be performed. The time can be significantly reduced.

[0013]

As described above, in the elevator car door safety device according to the present invention, the first lead wire connected to the safety switch is brought into sliding contact with the current-carrying sheet laid on the guide rail. Since the seat and the appliance box on the car are connected via the second lead wire, the wiring chain conventionally used to protect the lead wire while following the opening and closing operation of the car door. There is no need to provide Therefore, even when the distance from the car door to the front end of the car sill is small, it is possible to avoid damage to the device due to interference between the wiring chain and the engagement roller, which was a concern at the time of inspection or rescue, and In addition, since it is not necessary to insert and fix the wiring chain, the time required for wiring the lead wires can be greatly reduced.

[Brief description of the drawings]

FIG. 1 is a front view of a car door provided with a car door safety device according to an embodiment of the present invention as viewed from a landing side.

FIG. 2 is a plan view of the car door shown in FIG. 1 as viewed from above.

FIG. 3 is an enlarged view of a main part showing a part of FIG.

FIG. 4 is a front view of a car door provided with a conventional car door safety device as viewed from a landing side.

FIG. 5 is a plan view of the car door shown in FIG. 4 as viewed from above.

FIG. 6 is a plan view of a car door and a landing door for explaining a problem of the related art.

[Explanation of symbols]

 Reference Signs List 1 car door 2 safety shoe 3 lever 4 safety switch 9 guide rail 10 hanger 12 appliance box 13 car sill 14 landing door 20 non-metallic sheet 21 conducting sheet 22 first lead wire 23 second lead wire

Claims (2)

[Claims] 1. A car door that is opened and closed by being guided by a guide rail provided at an upper part of a car and is disposed so as to protrude from a tip end of the car door in a closing direction and relatively moves in an opening direction. A safety shoe that is capable of reversing operation, and a safety switch that outputs a restart door signal when the safety shoe performs the retreating operation when the car door is closed, and the safety switch and the safety switch are provided on the car. In an elevator car door safety device in which an appliance box provided in the elevator is electrically connected via a lead wire, while laying an energizing sheet on the guide rail along the longitudinal direction thereof, the lead wire, A first end in which one end is connected to the safety switch and the other end is in sliding contact with the energizing sheet;
And a second lead wire having one end connected to the current-carrying sheet and the other end connected to the appliance box. 2. The elevator car door safety device according to claim 1, wherein a non-metallic sheet is interposed between the guide rail and the energizing sheet.