JPH11292432A - Opening and closing device for elevator car door - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stabilize the travel behavior of a narrow car door. SOLUTION: This car door opening and closing device for elevators is provided with doors 1, 2 arranged at a door way of a car, a pair of upper and lower driving pulleys 17, 18 arranged on the door way side of the car, a pair of upper and lower driven pulleys 19, 20 rotated by the driving pulleys 17, 18 respectively, an upper side belt 22 laid over the upper side driving pulley 17 and the upper side driven pulley 19, a lower side belt 23 laid over the lower side driving pulley 18 and the lower side driven pulley 20, and a motor 26 for rotating the pair of upper and lower driving pulley 17, 18 simultaneously to move the upper and lower belts 22, 23. The upper and lower ends of the doors 1, 2 are anchored to the side in the same moving direction of the upper and lower belts 22, 23.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a car door opening / closing apparatus for stably driving a car door of an elevator.

[0002]

2. Description of the Related Art Conventionally, there is an elevator car door opening / closing apparatus as shown in FIG. 2, for example. In the figure, car doors 101 and 102 are provided at the entrance of the car so as to be openable and closable (other doors are omitted).
The hangers 103 and 104 are provided on 102, and rollers 105 and 106 and 107 and 108 are attached to the hangers 103 and 104. Roller 105,
106, 107 and 108 are rollably engaged with a door rail 109, and the doors 101 and 102 run along the door rail 109.

The doors 101, 102 are hangers 103, 1
The belt 11 is fastened to the belt 110 via the
When the drive sheave 111 is rotated by the motor 113, the doors 101 and 102 are pulled by the belt 110 to open and close. At this time, the rollers 105, 106 and 107, 108 attached to the doors 101, 102
Rolls on the door rail 109.

[0004]

In such a conventional car door opening and closing device, the upper ends of the doors 101 and 102 are pulled by a belt 110. Here, if the door has a small width and a vertically elongated shape, the distance between the rollers 105 and 106 and 107 and 108 is also small. For this reason, the rollers 105 and 106
And doors 101 and 10 with a small gap between 107 and 108
2 is pulled by one upper belt 109 and runs on the door rail 109, the doors 101, 1
02 became unstable, the doors 101 and 102
However, there is a problem that the opening and closing may not be performed smoothly.

An object of the present invention is to stabilize the running behavior of a car door having a small width.

[0006]

In order to achieve the above object, according to the present invention, there is provided a door provided at an entrance of a car, and a pair of upper and lower drives arranged at the entrance of the car. A pulley, a pair of upper and lower driven pulleys respectively rotated by the driving pulley, an upper belt hung on an upper driving pulley and an upper driven pulley, a lower driving pulley and a lower driven pulley, A lower belt, and a driving means for simultaneously rotating a pair of upper and lower driving pulleys to move the upper and lower belts, and to move the upper and lower ends of the door to the same moving direction side of the upper and lower belts. Each has a fixed structure.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 1 is a view showing an embodiment of an elevator car door opening / closing device according to the present invention.

In FIG. 1, reference numerals 1 and 2 denote a pair of double-opening doors which are openably and closably provided at a car-side entrance of an elevator. The doors have a small width and a vertically elongated shape. Other doors (not shown) together with these doors 1 and 2
The door is opened and closed in conjunction with the doors 1 and 2 by door interlocking means.

At the upper ends of the doors 1 and 2, hangers 3 and 4 are provided, respectively.
6 and 7, 8 are attached. The rollers 5, 6 and 7, 8 are rollingly engaged with the door rail 9,
As a result, the doors 1 and 2 travel along the door rail 9. In order to prevent the doors 1 and 2 from coming off the door rails 9 on the hangers 3 and 4, fixed rollers 10 and
11 and 12, 13 are attached.

Door rollers 14 and 15 as door shoes are rotatably attached to the lower ends of the doors 1 and 2, and the door rollers 14 and 15 roll in a guide groove 16a of a car side sill 16. The running of the doors 1 and 2 is guided by the door rollers 14 and 15 rolling in the guide grooves 16a.

A pair of upper and lower driving pulleys 17 and 18 and a pair of upper and lower driven pulleys 19 and 2 are provided above and below the entrance of the car.
The drive pulleys 17 and 18 are connected by a single drive shaft 21, and the drive shaft 21 is rotationally driven by a motor 26. In addition,
The drive shaft 21 and the motor 26 constitute driving means. An upper belt 22 is hung horizontally between the upper drive pulley 17 and the upper driven pulley 19. Also, the lower drive pulley 18 and the lower driven pulley 20
, The lower belt 23 is hung horizontally.

When the drive shaft 21 is driven to rotate by the motor 26, the upper and lower belts 22, 23 simultaneously rotate and move. At this time, the front side 22 of the upper belt 22
a and the front side 23a of the lower belt 23 move in the same one movement direction, and the rear side 22b of the upper belt 22 and the rear side 23b of the lower belt 23 move in the same other movement direction in the opposite direction. And the front side 22a, 23a and the rear side 22b,
The moving directions of 23b are different from each other.

The hangers 3 and 4 are integrally formed with fastening portions 3a and 4a, which are fastened to the front side 22a and the rear side 22b of the upper belt 22, respectively. At the lower ends of the doors 1 and 2, fastening members 24 and 25 are provided.
3 are fixed to the front side 23a and the rear side 23b.

When the motor 26 rotates forward (clockwise), the drive pulleys 17 and 18 rotate forward via the drive shaft 21, and the upper and lower belts 22 and 23 move around in the direction indicated by the solid arrows. The front side 22a of the upper and lower belts 22, 23,
Since the directions 23a and the rear sides 22b and 23b are different from each other, the doors 1 and 2 are opened by the belts 22 and 23. At this time, the upper and lower ends of the doors 1 and 2 are simultaneously pulled by the belts 22 and 23 via the fastening portions 3a and 4a and the fastening members 24 and 25, so that even if the width of the doors 1 and 2 is small, , 6 and the distance between the rollers 7, 8 are small, the running behavior of the doors 1, 2 is stable. Next, when the motor 26 rotates in the reverse direction, the upper and lower belts 22, 23 rotate and move in the direction of the dashed arrow, and the doors 1, 2 close.

Although the above embodiment has been described with respect to a double door, the present invention may be applied to a single door.

[0016]

As described above, according to the present invention,
Since the upper and lower ends of the door are fixed to the same movement direction side of the upper and lower belts, the running behavior of the door is stable, and the door opens and closes smoothly.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of an elevator door opening / closing device according to the present invention.

FIG. 2 is a perspective view of a conventional elevator door opening / closing device.

[Explanation of symbols]

1, 2, doors, 9 door rails, 17, 18 drive pulleys, 19, 20 driven pulleys, 22, 23 upper and lower belts, 26 motors.

Continuation of the front page (72) Inventor Ritsuyuki Sato 3-2-1 Sakado, Takatsu-ku, Kawasaki-shi, Kanagawa Japan Otis Elevator Co., Ltd.

Claims (2)

[Claims] A door disposed at an entrance and exit of the car; a pair of upper and lower drive pulleys disposed at the entrance and exit of the car; a pair of upper and lower driven pulleys respectively rotated by the drive pulley; The upper belt hung on the driving pulley and the upper driven pulley, the lower belt hung on the lower driving pulley and the lower driven pulley, and the upper and lower Driving means for moving the lower belt, wherein the upper and lower ends of the door are fastened to the same moving direction side of the upper and lower belts, respectively. 2. The door is a pair of double-opening doors, and upper and lower ends of one of the doors are fastened to the same moving direction side of an upper and lower belt, respectively, and the upper and lower ends of the other of the door are upper and lower. 2. The elevator car door opening / closing device according to claim 1, wherein the lower belt is fixed to the same other movement direction side of the lower belt.