JPH0743107Y2 - Elevator circular door drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a drive device for a circular door of an elevator.

(Prior Art) Normally, a panel of an elevator car door is formed into a flat surface, and the door is opened and closed straight to the left and right.

However, with the diversification of the interior design of the building, the elevator car has been made cylindrical, and the car door also occupies a part of the cylindrical shape of the car to match this, and its cross section becomes an arc shape, drawing an arc-shaped trajectory and left and right. A so-called circular door that opens and closes is used.

An example of the basic configuration of the opening / closing drive device for the circular door will be described with reference to FIG. 4 (and FIGS. 2 and 3 for reference).

A circular door is composed of a cylindrical door panel, a door hanger that suspends the upper part of the door, a door rail, and a sill that guides the lower part of the door (see Figures 2 and 3 for the above).

Such a circular door is opened and closed by a drive device provided on the car ceiling and a link device linked to the end of the drive device.

These devices are constructed as shown in FIG.

A cylindrical car 1 is provided with circular doors 2 and 2. As a link device 3 for driving a circular door, one end has a center of curvature of the circular door 2 as a fulcrum C, and the other end connects a door upper portion through a small link 4 (the length of which is a curvature of a center line of a door panel). Approximately the same as the radius) are installed symmetrically on the left and right doors.

In the fan-shaped space formed by the two drive links 5, 5, a door motor 6 and a speed reducer 7 including a belt and a pulley are arranged, which is fixed on a car frame, and the speed reducer 7 and the drive link 5, The middle of 5 is connected by connecting rods 8 and 8, respectively.

The drive device for the circular door 2 has such a configuration, and when the door motor 6 rotates, the drive links 5, 5 simultaneously open and close the left and right door panels.

(Problems to be Solved by the Invention) By the way, the circular door drive device having such a configuration has the following problems.

Since the rotation center C of the drive link 5 is aligned with the center of the car, it is necessary to change the length of the drive link depending on the size of the car. That is, the links will be remodeled variously for each different elevator design.

The size of the door motor and the speed reducer needs a certain size in order to obtain a predetermined driving force, and cannot be so small. However, since these devices are arranged in the fan-shaped space formed by the left and right drive links at the door closed position, they may not be applicable to a small car.

Although the center of rotation C of the drive links 5 and 5 is aligned with the center of the cylindrical car, this centering during assembly is difficult and assembly workability is reduced.

The object of the present invention is to solve the above problems and to obtain a door drive device which can cope with a slight change in the size of a car and can be installed in a small car and has a good assembling workability.

[Structure of the Invention] (Means for Solving the Problems) The present invention has a door motor, a speed reducer, and a slider for converting the rotational motion of the speed reducer into a linear motion in series from the center of curvature of a circular door toward the center of the car entrance / exit. Then, the two rotation fulcrums of the link device that opens and closes the left and right doors are placed at the left and right sides from the center of the cab, that is, the center of curvature of the circular door,
The slider and the drive link are connected via a connecting rod.
The distance between the fulcrums of the link device and the distance between the fulcrums of the connecting rods on the slider are set to have substantially the same size.

(Operation) Since the present invention has such a configuration, the rotary motion of the door motor and the speed reducer is converted into a linear motion by the slider, and the link device operates to open and close the circular door. Further, in the case of a circular door of a cab having a slightly different size, the position of the rotation fulcrum of the link device can be moved and adjusted to absorb the change, and one type of link device can be used in time.

(Embodiment) An embodiment of the present invention will be described with reference to FIGS.

An upper portion of a cylindrical door panel is suspended via a door hanger 10 on a door rail 9 having the same curvature of the panel. Similarly, the lower part of the door panel is guided through a sill groove 11 having the same curvature as the panel through a guide shoe.

The door motor 6 is fixed to a car frame 12 provided in the center above the car. A pulley 13 is attached to the output shaft of the door motor, and a large pulley 14 is attached on the same surface as the door motor to connect with a V-belt 15 for deceleration. This large pulley shaft has a chain drive sprocket
16 is fixed and the reduction gear is configured.

A rail 17 is laid in front of the large pulley and toward the center of the doorway, and a slider 18 for converting the rotational movement of the door motor into a linear movement is placed on the rail 17. Further, a chain idler sprocket 19 is arranged in front of the slider 18.

A drive plate 20 provided with a fulcrum shaft for driving a door link device is provided on the slider 18, and a drive chain 21 is returned from the drive plate 20 via a chain drive sprocket 16 and a chain idler sprocket 19. Cross over. On the other hand, a rotation fulcrum C of the door link is provided at a position apart from the center of the car by a certain distance, and a drive link 5 having substantially the same length from the rotation fulcrum C to the car side wall is provided. The door 2 is connected to each other via the connecting rod 8 and the small link 4.

The fulcrum distance h between the connecting rods 8 on the drive plate 20 is substantially the same as the distance H between the rotation fulcrums C and C.

The drive device thus constructed opens and closes the circular door as follows.

The door motor is rotated by an opening / closing signal from the control device, and the slider, that is, the drive plate is moved via the chain. The connecting rod moves the drive link around the fulcrum in the door opening direction.
The rotational force of the drive link travels along the small link to drive the door hanger in the opening direction.

[Effects of the Invention] The following effects are obtained by the present invention.

(1) Since the link fulcrum is not centered in the car room, the same drive link can be used even if the car size changes slightly.
That is, conventionally, two types of drive link lengths, L _A and L _B , were required for each of the cab A having the radius a and the cab B having the radius b.
However, if there is not much difference between these lengths, the rotation fulcrum C
Only one drive link needs to be moved.

(2) Since the door motor and the speed reducer are arranged in the space between the rotation fulcrums of the link device, the space factor is better than in the past, and it is possible to accommodate a small elevator.

In this case, as shown in FIG. 1, the distance H between the link fulcrums
The distance h between the driving fulcrum and the driving fulcrum may be determined according to the size of the door motor and the speed reducer, and the length and front and rear positions of the drive link may be determined so as to follow the curvature of the rail.

(3) Since the rotation fulcrums of the left and right drive links are not shared, even if there is a difference in precision between the links, the fulcrum positions can be adjusted separately to facilitate assembly. No skill is required for the assembly work as in the past.

(4) The installation space for the door motor can be secured in the center of the car, and it can be used for small cars. At the same time, there is room for selection in terms of the relationship between the drive link size and the car size, and the number of drive devices is reduced.

[Brief description of drawings]

FIG. 1 is a schematic top view of a circular door driving device according to the present invention,
2 is a detailed view of FIG. 1, FIG. 3 is a view taken along the line III-III of FIG. 2, and FIG. 4 is a schematic top view of a conventional circular door driving device. 1 ... Car room, 2 ... Circular door, 3 ... Link device, 4 ... Small link, 6 ... Door motor, 7 ... Reducer, 8 ... Connecting rod, 9 ... Door rail, 18 Slider, 20 ... Drive plate C: rotation fulcrum, O: center of curvature

Claims (1)

[Scope of utility model registration request] 1. Circular loci are drawn by suspending two circular doors on a door rail of a car ceiling, and connecting the upper portions of the circular doors to a drive device including a door motor, a reduction gear and a link device provided on the ceiling. In a circular door drive for an elevator that opens and closes a circular door to the left and right, a door motor, speed reducer, and slider are placed from the center of curvature of the circular door toward the center of the doorway, and the door is rotated to the left and right of the center of curvature of the door. A circular door drive device for an elevator, comprising a link device having a fulcrum and connected to a slider via a connecting rod.