The present invention relates to a motorisation for closing and opening automatic doors.

In particular, the present invention applies to the case of sliding doors with one or more winds with lateral or central opening, horizontal and vertical, linear or circular, used for instance in lifts, airports, underground railways and other public locations in general. The present invention can also be applied to the case of folding doors, such as those used on buses and trolley buses.

In the case of doors with automatic doors constructed with sliding wings, each wing is integral with a sliding carriage driven by a belt. In some cases, a so-called"arm"actuation is provided, which consists of a system of levers transforming rotary motion into linear motion.

In the case of belt motorisations, the belt can in turn be motorised by a gear motor with the interposition of lever mechanism to obtain the transformation of the rotary motion of the gear motor shaft into a rectilinear motion of the wings integral with the belt itself.

A possible embodiment variation provides for the use of a variable speed motor with incorporated braking, connected to one of the pinions whereon the belt is wound. In this case, too, a series of cinematic speed reducing mechanisms are provided between the motor and the pinion.

In addition to the aforementioned solutions, a direct motorisation of one of the pinions whereon the belt is wound can also be provided.

Prior art motorisations have some drawbacks. In the first place, to transmit motions mechanical reductions and leverage mechanisms are required, which complicate the structure and are subject to wear and possible malfunctions.

Secondly, prior art motorisations do not allow to exploit commercial motors configured for large production runs.

DISCLOSURE OF INVENTION.

An aim of the present invention is to eliminate the aforesaid drawbacks, making available a motorisation for closing and opening automatic doors that is simple, reliable and applicable to the different types of automatic doors currently in use.

An additional aim of the present invention is to obtain a motorisation that is free from mechanical reductions or lever mechanism, exploiting the application of commercial motors configured for large production runs.

Said aims are fully achieved by the motorisation for closing and opening automatic doors of the present invention, which is characterised by the content of the claims set out below and in particular in that it comprises a motor that delivers torque in that it is anisotropic operatively associated to the door.

Said motor can be a synchronous reluctance motor in axial lamination or transverse lamination configuration, or it can be a variable reluctance motor.

Moreover, said motor can act directly through its own shaft on a pinion for actuating the transmission belt which regulates the actuation of the wings, or it can act directly through the interposition of a motion transmission element.

BRIEF DESCRIPTION OF DRAWINGS.

This and other characteristics shall become more readily apparent from the

description that follows of a preferred embodiment illustrated, purely by way of non limiting example, in the accompanying drawing tables, in which Figures 1 and 2 show a front view of two possible motorisations.

BEST MODE FOR CARRYING OUT THE INVENTION.

With reference to the figures, the reference number 1 schematically indicates an automatic door for example of lifts, with automatic actuation of wings 6.

The closing and opening of the automatic door 1 is commanded by means of a motorisation comprising a motor 2 operatively associated to the door and a regulator, i. e. a control panel of the motor, not shown in the figure as it is substantially known.

The aforesaid motor is original a motor that delivers torque because it is anisotropic. This terms refers to a series of motors such as synchronous reluctance motors both in the axial and transverse lamination configuration, or variable reluctance motors.

The motorisation of the automatic door 1 can be of the type commonly defined as"arm" (not shown herein), i. e. comprising a series of lever mechanisms to transform a rotary motion into a linear motion.

Other possible motorisation embodiments, as illustrated herein, are defined as"belt"because they comprise a motion transmission belt 3 wound on a pair of pinions 5 and associated to the door 1 to command its opening or closing.

In the case illustrated in Figure 1), defined as direct belt motorisation, the motor 2 drives the belt through the interposition of a transmission element 4 (transmission belt), whilst in the case of Figure 2), defined as direct belt, the motor 2 drives the belt directly keyed to one of said pinions 5.

The motorisation according to the present invention can command automatic

doors comprising a plurality of wings 6 of various types, such as the doors of lifts and elevators, with central or lateral opening, with horizontal or vertical, linear or circular wings or automatic folding doors used for example on public transportation vehicles such as buses and trolley buses..

The case shown in the figure relates in particular to a motorisation of automatic door with wings in which the wings are integral with the belt 3.

The motorisation of the present invention can also be applied to winches or gearless systems for lifts or elevators.