JP2670191B2 - Elevator car door safety device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to improvements in elevator car door safety devices.

[0002]

2. Description of the Related Art A safety box is provided at the tip of an elevator car door, and when a force in the opening direction is applied to this safety box while the car door is moving in the closing direction along the threshold, this car door automatically moves. It is to be inverted.

By the way, when a slender cord such as a dog leash or a cord of a vacuum cleaner rides on the landing door and the car door, the cord cannot be detected by the door safety when the car door is closed. The car will run while pulling and pulling, which is very dangerous.

As a means for improving it, for example, the actual exploitation 64-64
According to Japanese Patent No. 12069, a pressure sensor is provided at the lower end of the car door below the operator of the safety station, and when the car door is closed, it is detected by using the string caught between the pressure sensor and the front pillar. A device has been proposed. In addition, public skill 89-1
According to Japanese Patent No. 3149, there is proposed a device in which tape switches are attached to both sides of the lower end portion of the car door, and when the car runs while the string is held, the string presses the tape switch to detect it.

[0005]

In the former device described above, in the former device, the string may be entangled with the pressure-sensitive sensor when the car door is closed, and the pressure-sensitive sensor may be damaged. It is intended for single doors and is not considered for double doors. Further, in the latter device, if the contact state between the string and the car door is poor, the string may not press the tape switch, which may cause a detection error. Since it has a structure to detect that there is a string,
There is also the problem of canning.

In view of the above drawbacks, the present invention is to provide a safety device for an elevator car door capable of reliably and safely detecting that the string is caught at the lower end of the safety train.

[0007]

[Means for Solving the Problems] This object is provided at the tip of an elevator car door, and when a force in the opening direction acts on the car door that is moving in the closing direction along the sill of the car, the car door is opened. In a safety device for an elevator car door having a hollow actuator to be reversed, a roller provided inside the operator and rolling on the sill, and the roller vertically displaced with respect to the operator. And a means for detecting that the amount of displacement exceeds a predetermined value.

[0008]

According to the present invention, the normal roller rolls only when the car door is opened and closed, and is not displaced vertically. Therefore, the detection switch does not work.

By the way, when a string such as a dog leash is on the threshold, the roller is displaced in the vertical direction when passing over the string when the car door is closed. This displacement amount is detected by the detection switch and the car door is inverted. Since the roller is configured to roll, it is safe because it does not get entangled with the cord.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Note that the car door is intended for double doors.

FIG. 1 is a diagram showing the overall configuration of a car door device. In the figure, 1 is a car door panel, 2 is a hanger roller provided above the car door panel 1, 3 is a rail on which the hanger roller 2 rolls, 4 is a door shoe provided below the car door panel, 5 is a sill, and a car door panel 1, the door shoe 4 is guided by a groove (not shown) of the sill 5 and the hanger roller 2 is rotated to move right and left on the rail 3. Reference numeral 7 is an operator of a safety station 6 provided at the end of the car door panel 1, 8 is a lever of the safety station 6, and when the operator 7 is operated in the opening direction, the operator 7 is rotated via the lever 8. I'm sorry. Reference numeral 10 is a safety device according to the present invention, which is provided inside the lower end of the actuator 7.

FIG. 2 is a detailed view of the main parts of the car door safety device 10. In the figure, 11 is a roller which comes into contact with the threshold 5 and rolls, 12 is a rod fixed to the roller 11, 13 is a frame for guiding the rod 12,
The frame 13 is fixed to the operator by bolts 14. Reference numeral 15 denotes a detection switch. One end of a lever 16 of the detection switch 15 is in contact with the upper portion of the rod 12, and when the roller 11 moves upward, the rod 12 and the lever 16 are moved.
The contact 17 inside the detection switch 15 is configured to open via the.

Next, the operation of this embodiment will be described.

Now, it is assumed that the leash 5 has no string such as a dog leash or a vacuum cleaner cord. In this case, when the car door advances in the closing direction, the roller 11 only rolls on the threshold 5 and does not move in the vertical direction. Therefore, detection switch 1
5 is invalid.

Next, it is assumed that the string 20 is placed on the threshold 5. At this time, if the car door advances in the closing direction, the roller 1
1 rides on the string 20 and is displaced by the height l of the string 20, and the detection switch 1 is moved through the rod 12 and the lever 16.
5 is actuated, the contact 17 is opened, and the car door is immediately inverted by the door control device (not shown). In addition, the string 20
No matter what the condition is on the threshold 5,
Since it only rolls over 0, the string 20 is not caught by the roller 5.

As described above, even if the dog leash, the cord of the vacuum cleaner, or the cord 20 such as a packing cord is placed on the sill 5, it can be detected reliably and safely.

In the present embodiment, the car door has been described as the double-opening door, but the single-opening door operates similarly. Also,
Although the detection switch 15 uses a contact, it is needless to say that it may be contactless.

[0018]

As described above, according to the present invention,
A roller is provided at the lower end of the safety operator, and the detection switch is activated when the roller is displaced upward by a predetermined value or more, so that the dog chain on the sill,
Even if a cord such as a cord of a vacuum cleaner is placed on the car door, the car door can be reliably and safely detected when the car door is closed.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of a safety device for an elevator car door.

FIG. 2 is a detailed view of a main part.

[Explanation of symbols] 1 Car door panel 5 Sill 7 Actuator 11 Roller 12 Rod 15 Detection switch 16 Lever 20 String

Claims (1)

(57) [Claims] 1. A hollow actuator provided at the tip of a car door of an elevator, which reverses the car door when a force in the opening direction acts on the car door which is advancing in the closing direction along the sill of the car. In the elevator car door safety device provided, a roller provided inside the operator, rolling the threshold, means for vertically displacing the roller with respect to the operator, and the displacement amount. A safety device for a car door of an elevator, comprising means for detecting that a predetermined value is exceeded.