ES2249851T3 - DRIVING DEVICE FOR ARROLLABLE AND SIMILAR ELEMENTS. - Google Patents

Abstract

An actuation device for roll-up elements and the like comprising a tubular body (1) which can be inserted in the tube (2) of a roll-up element (3). The tubular body (1) has a supporting head (10) at one end and an actuation element (11) for turning the tube (2) at the other end. The device further comprises, inside the tubular body (1), an electric motor (20), a brake (22) which is adapted to prevent the movement of the roll-up element (3) when the motor (20) is not powered, and a reduction unit (23) which is adapted to turn the actuation element (11). Stroke limiting elements (30) externally to the tubular body (1) are further provided. <IMAGE>

Description

Drive device for elements Rolling and the like.

The present invention relates to a device of drive for rolling elements and the like.

It is known that geared motors Tubular are used for automatic actuation of elements Rolling shutters, such as blinds, rolling shutters and the like; said units consist substantially of a body tubular ending at one end with the support of said gearmotor and ends, at the other end, with a bolt intended to drive the rolling element that drives the tube of the rolling element, inside which the body is arranged tubular.

Inside the tubular body are arranged a limit switch, a capacitor, a engine, a brake and a reduction unit.

The limit switch is used to control the maximum stroke of the rolling element during the up and down movements, and must be regulated at the time of installation.

The capacitor serves to provide the correct starting torque to the single phase motor when the drive of the rolling element while the motor electric is used to drive, by means of the reduction unit, the generally octagonal tube to which the element is connected Rollable

The brake serves to prevent the movement of the shutter when the engine is not powered.

The devices according to the prior art they present first of all a constructive complexity considerable, derived from the presence of the end switch career; they also have great difficulty for the correct stroke regulation that the rolling element can develop.

An example of such a state of the art is described in the European patent EP-B-0 751 278, which faces the problem of improving the manual operation of the devices Electric drive for rolling elements. The document DE-A-38 06 733 describes means career limiters in the form of sensors, which require a complex electronic control.

The purpose of the invention is to solve the problem noted above, providing a device drive for rolling elements and similar elements radical constructive simplifications, eliminating the need for  adjust the limit switch located inside the tubular body

Within the scope of the previous purpose, a particular object of the invention is to provide a device of drive in which the whole system is simplified notably, from a constructive point of view, thus reducing The stages of installation.

Another objective of the present invention is provide a drive device that, thanks to its particular constructive characteristics, be able to guarantee Maximum reliability and safety of use.

Another objective of the present invention is provide an easy to perform drive device to from the elements and materials that are usually available in the market and that is also competitive from a purely commercial point of view.

This purpose, these objectives and others that will reveal then they are achieved by a drive device for rolling elements and similar, according to the invention, comprising a tubular body that It can be inserted into the tube of a rolling element, said tubular body presenting a support head in a end and a drive element to rotate said tube in the another end, characterized in that it comprises, inside said tubular body, an electric motor, a brake intended for prevent movement of the rolling element when the motor does not is powered, and a reduction unit intended to rotate said drive element, also provided means of stroke limitation arranged outside said body tubular.

Other features and advantages of this invention will become more clearly apparent from the detailed description of a preferred embodiment but not exclusive of a drive device for elements roll-up and the like, illustrated in the accompanying drawings only by way of non-limiting example, in which:

Figure 1 is a sectional view of the drive device that can be applied inside the tube of a rolling element;

Figure 2 is a sectional view of the drive device according to the invention;

Figure 3 is a view of the device of drive with a clutch;

Figure 4 is a view of a device of unidirectional interlocking that can be incorporated into the tube of the rolling element;

Figure 5 is a view of a device of unidirectional interlocking that can be introduced into said body tubular.

With reference to the mentioned figures previously, the drive device for elements Rollable and the like, according to the invention, comprises a body tubular 1 that can be introduced into tube 2, generally octagonal, of a rolling element 3.

The tubular body 1 is provided with a head of support 10 on the one hand and, on the other hand, of an element of drive 11 constituted, for example, by a drive pulley that it is coupled to tube 2 to rotate and operate the element Rollable

Inside the tubular body 1 a electric motor 20 with a capacitor 21 interposed to be able to drive the single phase motor.

The engine is connected to a brake 22, which in turn drives a reduction unit 23, whose output bolt 24 is associated with the driving pulley 11.

The brake is intended to prevent the rolling element movement when the motor is not fed said blocking action is performed both against the lowering of the rolling element under its own weight, as against the attempt to roll the rolling element by pushing manually.

The particularity of the invention consists in the fact that there is no switch inside the tubular body complicated end of career to be regulated; the devices race limiters are arranged outside the tubular body and are advantageously provided directly in the element overwhelming; said devices incorporate fasteners 30, located on the underside of the rolling element, and means that block the parts that join the roller and the element Rollable, which in a preferred embodiment are provided with articulated segments 31 that interlock when pushed reciprocally.

This prevents winding in the direction opposite, once the blind or the rolling element has been completely lowered, because the segments, when interlocked, stop tube rotation.

This embodiment is particularly simple, since the absence of the limit switch in the inside the tubular element eliminates the need for regulation or configuration of any kind.

For greater security, it is possible to incorporate a clutch 40 located between the brake and the reduction unit and intended to limit the torque when the element Rollable arrives at the end of its up and down career.

Clutch 40 is advantageously provided with a molded body 41 ending in a pinion 42 intended for transmit the movement to the reduction unit and provided, in the other end of a circular housing with cavities that houses 43 balls connected to the drive shaft and pushed elastically

Under normal loading conditions, the balls, pushed by a spring, they fit into the body cavities of the clutch and transmit the rotational movement; when produces an overload or the blind is blocked, the greatest force of retention compresses the spring, the balls retract into the hole of the tree, allowing the sliding between the body of the clutch and drive shaft; under these conditions, the engine continues turning without activating the blind, which has reached the end of its career.

Another possibility to limit the maximum load of the engine is to provide an electronic card that disconnects the power supply when a certain torque is exceeded limit and as a consequence, excessive absorption of stream.

According to another embodiment, illustrated in the Figure 4, it is possible to incorporate an interlocking device unidirectional, indicated with reference 50, which is constituted substantially by a hub 51 that houses blocks inside  of retention 52 pushed by respective springs 53.

The blocks can be inserted in notches 54 practiced on the inner surface of the octagonal ring 55 for connection with the tube.

The movement of the engine is transmitted by the bucket through square hole 57 and springs, pushing the blocks out, cause these blocks to transmit the same rotary movement to the outer ring, as well as when the direction of rotation occurs counterclockwise of the drawings, while when the rotation is in the direction schedule, said blocks, pushed by the outer ring, expire the force of the springs and retract in their housings, thus allowing relative sliding between the hub and the ring.

Under these conditions, the engine keeps turning without actuate the rolling element, which has reached the end of its run down

The embodiment with a device unidirectional interlocking, as shown in figure 5, it can also be provided inside the tubular body 1, placing a unidirectional interlocking assembly between the brake and the reduction unit instead of the clutch.

In this case, the interlocking device unidirectional, indicated with reference 60, may have some 61 balls similar to those used for the clutch and pushed by a spring 62 in the cam-shaped toothed housings 63; in the drawing, said housings 63 are oriented in order to transmit the movement in the clockwise direction, and inverting the accommodation, the movement can be transmitted in the direction counterclockwise

It follows from the previous description that the invention achieves its purpose and the established objectives and in particular emphasizes the fact that you get a extremely simple and functional drive device, continuous, using, in its realization, variable switches, that is switches that require a constant human presence during actuation of the rolling element; said control It can be done remotely, but always with a presence human

The invention thus conceived is susceptible to numerous modifications and variations, all of which are included within the scope of the inventive concept.

In practice, the materials used as well like shapes and dimensions, they can change according to requirements.

When the technical characteristics mentioned in any claim they are followed by reference signs, such references are included for the sole purpose of increasing the intelligibility of the claims and, consequently, such reference signs have no limiting effect on the interpretation of each element identified by way of example for these reference signs.

Claims (6)

1. Drive device for rolling elements and the like, comprising a tubular body (1), which can be inserted into the tube (2) of a rolling element (3), said tubular body (1) being provided with a head of support (10) at one end and an actuator element (11) for rotating said tube (2) at the other end and, inside said tubular body (1), an electric motor (20), a brake ( 22) intended to prevent the movement of the roll-up element (3) when the motor (20) is not powered, and a reduction unit (23) designed to rotate said drive element (11), further limiting means being provided of stroke (30) disposed outside said tubular body (1), characterized in that said stroke limitation means comprise protruding elements (30) located at the free edge of the blind and elements (31) constituted by some articulated segments that are interspersed between and said tube (2) and the end of said rolling element (3), said articulated segments (31) being reciprocally articulated when subjected to traction, and reciprocally locked when subjected to compression. 2. Drive device according to claim 1, characterized in that it comprises a clutch (40) that is sandwiched between said brake (22) and said reduction unit (23). 3. Drive device according to one of the preceding claims, characterized in that it comprises an electronic card designed to control the electrical absorption of said motor (20) in order to interrupt the power supply in case of overload. 4. Drive device according to one of the preceding claims, characterized in that it comprises a unidirectional interlocking unit (50) for the idle rotation of said gearmotor (20) when said winding element (3) is at the end of its downward stroke . 5. Drive device according to one of the preceding claims, characterized in that said unidirectional interlocking unit (50) includes a hub (51) that supports blocks (52) that are elastically pushed, said hub (51) being housed inside of a ring (55) that can be inserted into said tube (2) and which has, on its inner surface, notches (54) for the insertion of said blocks (52) when the hub (51) rotates in one direction, and for unlocking said blocks (52) when said hub (51) rotates in the other direction. 6. Drive device according to one of the preceding claims, characterized in that said unidirectional interlocking unit (66) is arranged, inside said tubular body (2), between said brake (22) and said reduction unit (23) , said unidirectional interlocking unit comprising balls (61) that are elastically pushed in order to fit into serrated housings with cam profile (63).