JPH07291563A - Automatic opening and closing type door safety device - Google Patents

Abstract

PURPOSE:To reduce the degree of oppression to a foreign matter and avoid easily the pinching thereof when the foreign matter like one's finger tip is pinched in a gap between doors or between the door and a post. CONSTITUTION:A low speed cage door 31b is supported slantingly to a door chute 12 by a door support part constituted of an oppressive spring 18 supported by a mounting stand 14 and bolt 16. When a foreign matter like one's finger tip is pinched between the low speed cage door 31b and a post 38 of an entrance of the cage, the low speed door 31b is easily inclined. Also, the inclination of the door is detected by an inclination detecting section and a control section controllably opens and closes the door to stop an automatic opening and closing type door and reverse the door.

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 automatic door which is opened and closed by a driving force of a motor, such as an elevator door.

[0002]

2. Description of the Related Art Conventionally, automatic opening and closing doors of elevators and the like are equipped with a safety device for preventing a user or luggage from being caught. For example, as shown in FIG. 3, an elevator car 30 moving on each floor has a car high-speed door 31a and a car low-speed door 31b as an automatic opening / closing door 31, and the car high-speed door 31a includes a limit switch as a safety device. The sliding piece 32 used is provided. When an elevator user or luggage contacts the sliding piece 32, the car high speed door 31a and the car low speed door 31b stop the closing operation and perform the door opening operation. Therefore, the user and the luggage can be prevented from being caught between the automatic opening / closing door 31, particularly the car high-speed door 31a and the car entrance / exit post 33.

In Japanese Utility Model Laid-Open No. 58-67874, as shown in FIG. 4, an elevator having a safety device for detecting a pinch in another portion of the automatic opening / closing door and performing a reversing operation of the door. An automatic door is disclosed.

FIG. 4 shows a safety device when a finger 35 of a user's hand may be caught in a gap 34 formed between the car high speed door 31a and the car low speed door 31b. The corner portion 36 of the basket low speed door 31b is formed as a separate component and is rotatably supported by the basket low speed door 31b by a hinge 36a. Further, a switch 37 is provided inside the low-speed basket door 31b so as to be positioned within the rotation range of the corner portion 36.

In the above structure, when the finger 35 of the user's hand getting on and off the elevator car is caught in the gap 34 during the opening operation of the automatic opening / closing door 31, the basket low speed door is increased in accordance with the increase of the caught amount of the finger 35. The corner portion 36 of 31b rotates about the hinge 36a, and the switch 37 is turned on. Therefore, the door drive motor (not shown) is stopped by the ON signal of the switch 37 to stop the increase of the trapping, or the door drive motor is rotated in the reverse direction to close the door, and the trapping is released to ensure safety. It secures sex.

In Japanese Utility Model Laid-Open No. 58-16775, as another safety device, as shown in FIG. 5, a user is provided in a gap 39 formed between a car low speed door 31b and a car entrance / exit post 38. The safety device is shown in the case where the fingers of the hand of the person may be caught. Inside the basket entrance / exit post 38, there are provided a responder 41 that is constantly urged toward the low speed door by a spring 40, and a switch 42 that operates by sliding the responder 41.

In the above structure, when a fingertip or the like is caught in the gap 39 during operation of the door, the responding body 41 (correctly, the plate material 41a provided on the responding body 41) resists the spring 40 by the sandwiched finger. Then, the responder 41 turns on the switch 42. As a result, safety is ensured by controlling the door drive motor as in the case of FIG.

[0008]

Since the conventional safety device is constructed as described above, when a fingertip or a foreign object is caught in the gap between the doors or the gap between the door and the basket entrance / exit post, the gap is reduced. There is a problem in that fingertips and foreign objects are strongly pressed while the door is stopped or driven in reverse to avoid danger without changing.

The present invention has been made to solve the above-mentioned problems, and it is possible to reduce the degree of pressure even when a fingertip or the like is caught, and to prevent the trapping easily. It is an object of the present invention to provide a highly-automatic door safety device.

[0010]

In order to achieve the above object, in a safety device for an automatic opening / closing door, a door that is automatically opened / closed by a driving force of a motor and a door provided at a lower end of the door is provided along a threshold. A door shoe that slides in the guide groove, a door support portion that tiltably supports the door with respect to the door shoe, a tilt detection portion that detects tilting of the door, and an output of the tilt detection portion according to the output of the tilt detection portion. And a control unit that controls opening and closing of the door.

[0011]

In the automatic door safety device according to the present invention, the door is supported by the door supporting portion so as to be tiltable with respect to the door shoe, and the door is easily tilted when a fingertip is caught. Further, the tilt detection unit detects tilting of the door, and the control unit controls opening / closing of the door.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described with reference to the drawings.

1 and 2 are structural explanatory views of an automatic opening / closing door safety device according to this embodiment.

In FIGS. 1 and 2, the same members as those in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted.

A guide groove 1 is provided on the sill 10 of the elevator basket.
0a is formed, and the door shoe 12 provided at the bottom of the basket low speed door 31b slides in the inside in a direction perpendicular to the paper surface of FIGS. 1 and 2. Inside the car low speed door 31b, there is provided a door support part for tiltably supporting the car low speed door 31b with respect to the door shoe 12. The door support portion is composed of a mounting base 14 and a pressing spring 18 supported by bolts 16. That is, the door shoe 12 has a door engaging piece 12a, and the door engaging piece 12a
Is a mount 14 provided on the inner wall of the basket low speed door 31b.
It is biased by a pressing spring 18 supported by a bolt 16. Further, inside the car low speed door 31b, a limit switch 20 is provided at a position where the upper portion of the door engaging piece 12a can come into contact with the car low speed door 31b as a tilt detection unit for detecting tilting of the car low speed door 31b. An operation signal of the limit switch 20 is input to a control unit (not shown) to control the automatic opening / closing door according to the input.

The operation of the automatic door safety device constructed as above will be described.

When a fingertip or a foreign object is caught in the gap 39 formed by the basket low speed door 31b and the basket entrance / exit post 38 during the opening operation of the automatic opening / closing door 31, the pressing spring 18 flexes in a flat manner, as shown in FIG. As shown, the lower end of the basket low speed door 31b inclines to the left in the figure. That is, the basket low speed door 31b
When an external force to the left in the drawing is applied to the door shoe 12, the door shoe 12 is pushed by the lower end of the mounting base 14 and tilts to the left in the drawing due to the amount of the gap formed with the guide groove 10a. As a result, the gap 39 widens, and the pressure on the foreign matter sandwiched in the gap 39 can be relieved. Further gap 39
It is possible to easily remove the foreign matter that has been sandwiched by applying an external force so as to spread.

Further, due to the tilting of the basket low-speed door 31b, the positional relationship between the door engaging piece 12a and the limit switch 20 changes, and the door engaging piece 12a moves to the limit switch 2.
0 is turned on to detect tilting of the car low speed door 31b.
An ON signal from the limit switch 20 is input to a control unit (not shown) to control the operation of the automatic opening / closing door 31 including the basket low speed door 31b. The control unit, for example,
The opening operation of the automatic opening / closing door 31 is stopped and, as described above, the gap 39 is further widened by a hand or the like to remove the trapped foreign matter, or the drive of the automatic opening / closing door 31 is reversed to trap the foreign matter. To prevent the progress and to perform the removing operation.

Although the illustrated example describes the insertion into the gap 39 formed between the car low speed door 31b and the car entrance / exit post 38, it is formed between the car high speed door 31a and the car low speed door 31b. Even if the above-mentioned safety device is applied to the clearance, the same effect can be obtained. In this case, a door support portion and a tilt detection portion similar to the car low speed door 31b are formed, and when foreign matter is caught in the gap, the car high speed door 31a tilts as shown in FIG.
1b tilts in the direction opposite to that of FIG. 2 against the biasing force of the pressing spring 18. Therefore, the controller is operated by turning on one of the tilt detection units provided on the car high speed door 31a and the car low speed door 31b.

Further, the safety device of this embodiment is applied to the automatic opening / closing doors of the elevator floors provided on the respective floors, and similar effects can be obtained for the mutual automatic opening / closing doors and the automatic opening / closing doors and the three-sided frame. You can

In the present embodiment, the limit switch is used as the tilt detecting section, but the tilt detecting section is not limited to this. For example, a photo sensor or a magnetic sensor may be used. The effect can be obtained.

Furthermore, in this embodiment, the automatic opening / closing door of the elevator has been described, but the same effect can be obtained by using the automatic opening / closing door of a building.

[0023]

As described above, according to the present invention, the doors are supported so as to be tiltable, and the opening / closing means that operates by the tilting of the doors is provided in the doors. When a fingertip or a foreign object is caught in a gap between the doorway pillar or the like, the door can be easily tilted to widen the gap, so that the pressing force can be relaxed and safety can be improved. Further, by applying an external force so as to further widen the gap, the foreign matter caught can be easily removed.

Further, since the tilt detecting section operates due to the tilt of the door and the door opening / closing operation is controlled by the signal from the tilt detecting section, the door opening / closing operation is stopped or reversed.
The safety can be further improved.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of an automatic door safety device according to the present invention.

FIG. 2 is a sectional view of an essential part for explaining a tilted state of the automatic door safety device according to the present invention.

FIG. 3 is a structural explanatory view of an automatic opening / closing door of the elevator as viewed from the inside of the elevator basket.

FIG. 4 is an explanatory diagram illustrating a configuration of a conventional automatic opening / closing door safety device.

FIG. 5 is an explanatory diagram illustrating another configuration of a conventional automatic opening / closing door safety device.

[Explanation of symbols]

 10 Sill 12 Door shoe 12a Door engaging piece 14 Mounting base 16 Bolt 18 Pressing spring 20 Mitt switch 31 Automatic opening / closing door 31a Basket high speed door 31b Basket low speed door 38 Basket entrance post 39 Gap

Claims (1)

[Claims] 1. A safety device for an automatically opening and closing door, comprising: a door that automatically opens and closes by a driving force of a motor; a door shoe that is provided at a lower end of the door and slides in a guide groove provided along a threshold; A door support portion that tiltably supports the door with respect to the door shoe, a tilt detection portion that detects tilting of the door, and a control portion that controls opening and closing of the door according to the output of the tilt detection portion. Automatic opening and closing type door safety device.