ES1264084U - MECHANISM FOR AUTOMATIC DOOR OPENING. (Machine-translation by Google Translate, not legally binding) - Google Patents

Abstract

Mechanism for automatic door opening, characterized in that it is made up of a fixed casing, preferably a cylinder (8), parallel to the axis of rotation of the door, within which an electric motor (26) is established whose axis of rotation is linked to a threaded shaft (2) through a speed reduction transmission, threaded shaft (2) into which a pusher bushing (3) is threaded, vertically movable up and down by guiding it through the less one vertical slot (8') provided in the fixed casing, having provided that the pusher guiding means are additionally linked to pins (14) that play within helical grooves established in a second cylinder or sleeve established axially and internally to the fixed main cylinder, which is arranged on a series of bearings, so that it can rotate within said cylinder, second cylinder or liner that is integrally linked to a door ring (5) flush with the cylinder or main casing, determining the means of linking and turning the door. (Machine-translation by Google Translate, not legally binding)

Description

DESCRIPTION

Mechanism for automatic door opening

TECHNICAL SECTOR

The present invention refers to a mechanism for automatic door opening, the purpose of which is to provide a mechanism that improves both active and passive safety in this type of installation, in addition to providing a compact and ergonomic mechanism.

The invention is therefore situated in the technical sector of accessibility, being applicable both in the elevator-lift industry for people with reduced mobility, as well as for the opening of automatic security doors in industrial machinery installations.

BACKGROUND OF THE INVENTION

At present we find commercial engines within the sector of manufacturers of elevators or excessively large elevators.

Because the door opening motors are bulky, it has been necessary to install them under the platform or outside the cabin as an addition with little visual value.

At the same time, this type of mechanism presents a series of problems, both from the point of view of active safety and passive safety, among which the following should be highlighted:

As for active safety, there are risks of entrapment with the opening-closing mechanism itself.

As for passive safety, these are usually mechanisms in which a hydraulic group participates, in which oil spills can occur due to breakage of elements.

In any case, and as mentioned previously, these types of mechanisms are very bulky mechanisms, requiring an unsightly external location, which is not protected from inclement weather, constituting an element susceptible to entrapment.

Furthermore, this type of mechanism usually lacks some type of security system to prevent the access door from being pushed open.

EXPLANATION OF THE INVENTION

The mechanism for automatic opening of doors that is recommended solves in a fully satisfactory way the problems previously exposed in the different aspects mentioned, based on a simple but effective solution, the device materializing in equipment in the form of a cylindrical tube with power from any point that we have a compact electrical network that can be hidden inside the frame where the door's axis of rotation is located, going completely unnoticed.

For this, and more specifically, the mechanism of the invention is constituted from a fixed casing or cylinder, which will be attached to the door frame, in which an electric motor is established whose axis of rotation is linked to a threaded shaft through a speed reduction transmission, so that the motor rotates through said reduction transmission a threaded shaft on which a pusher bushing threads, which is vertically movable up and down depending on the direction of rotation of the electric motor, pusher bushing that is linked to some rollers as vertical guiding means thereof through one or more vertical grooves established in the housing or fixed cylinder.

This guiding mechanism is additionally linked to a second cylinder or sleeve established axially and internally to the fixed main cylinder, which is arranged on a series of bearings, so that it can rotate within said cylinder, counting on its surface a couple of helical grooves, in which rollers associated with the pusher also play.

In this way, the vertical displacement of the pusher caused by the electric motor causes an angular displacement of the internal cylindrical casing according to the path of the helical grooves thereof.

For its part, said rotating internal cylindrical casing is extended below in a neck to which a ring is attached that will be flush with the cylinder or main casing, determining the means of linking to the door, making it rotate, thus eliminating any prominent element. external.

In the first place, it should be noted the advantage that the elements that generate the rotation of the element with respect to the axis resulting in the opening and closing movement of the access object, are housed inside the fixed location.

In this way, a minimum hindrance is caused, minimizing the possibility of an accident due to the entrapment of the user.

It is worth highlighting the fact that the structure of the device itself is capable of blocking the rotating element when it is pushed on it, preventing this opening mode.

BRIEF DESCRIPTION OF THE DRAWINGS

To complement the description that is going to be made below and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical realization thereof, a drawing is attached as an integral part of said description. For illustrative and non-limiting purposes, the following has been represented:

Figure 1.- Shows an exploded exploded view of a mechanism for automatic door opening made in accordance with the object of the present invention.

In said figure 1 the following elements are represented, in accordance with the following numerical references:

18. - Elastic self-friction bushing.

19. - Cup disc spring.

20. - Cup disc spring.

21. - Steel ball.

22. - Radial ball bearing.

23. - Oblique ball bearing.

24. 25.- Guide ring.

26. - Electric motor 24V, R = 46/1 and 42W.

27. - Elastic ring.

28. 29.- Elastic washer.

30. - Prisoner.

31, 32, 33, 34.- Screws.

35, 36.- Key.

37.- Self-locking nut.

PREFERRED EMBODIMENT OF THE INVENTION

Figure 1 shows the device of the invention exploded, so that the components that participate in it are divided into two vertical groups.

In this sense, in the group on the right, an initiating mechanism of the dynamic-kinematic movement is represented transforming the current of the electrical network by means of automatisms to obtain an impulsive or pushing mechanical movement.

Within this semi-assembly there is an electric motor (26) of 24V with a composition of planetary gears that reduce revolutions 46/1 and 42W, a set of cup disk springs (20) together with a threaded joint (9) and a friction disc (10) so that the transmission to the threaded shaft (2) is indirect and thus avoid overheating of the engine and even its breakage.

In turn, the threaded spindle or shaft (2) can be seen rotating on itself, the actuation of which causes an axial translational movement on the pusher bushing (3) that threads on said spindle, and in which the pin bushes are housed ( 14) with its rollers (15) facing 180 °, its function being to be guided through the cylinder grooves with helical grooves (4), as well as jointly on the vertical grooves (8 ') provided in the cylinder (8 ).

Thus, in the grouping on the left of the figure, we find the action terminator mechanism whose purpose is based on the development of said invention where a coaxial cylinder (8) appears, among others, which is the main structural support of the invention where the rest of the components are intrinsically located, so that inside it is housed the cylinder with a helical groove (4) which transforms a vertical transactional movement into a rotational one, and which is secured by means of a key to the door ring (5) thus generating the final action of opening the door.

From this structuring, the operation of the device is as follows:

The pusher bushing (3) works with a translational movement, that is to say axial, vertical, driven by the rotational movement generated by the motor (26) which reduces the number of revolutions in a ratio of 46 to 1 by means of a set of gears planetary, through the threaded shaft (2) that is housed coaxially inside the pusher moving vertically along the axis of rotation.

In turn, the pusher bushing (3) is accompanied by two rollers (15) and two pins (14) that are located diametrically on its curved surface, the rollers (15) perform the function of guiding through the grooves (8 ' ) of the external cylinder (8) in an axial and linear direction to the pusher (3) when it is actuated by the threaded shaft and in turn the pins (14) located in correspondence with the rollers (15) are guided, pushed inside the the helical grooves of the cylinder with helical grooves (4) generating a limited rotational movement of 100 degrees for said cylinder with helical grooves (4).

Finally, the cylinder with helical grooves (4) integrally accompanies by means of a key (36) the door ring (5) generating a rotational movement that produces the opening of the door.

The invention can be applied to any type of access of multiple sizes and weights, this is because the reduction by means of the group of planetary gears together with the actuation of the threaded shaft provides sufficient torque, resulting in an optimal rotational force for the function. to play.

Claims (6)

1a.- Mechanism for automatic door opening, characterized in that it is constituted from a fixed casing, preferably a cylinder (8), parallel to the axis of rotation of the door, in which an electric motor (26) is established whose The rotating shaft is linked to a threaded shaft (2) through a speed reduction transmission, threaded shaft (2) into which a pusher bushing (3) is threaded, vertically movable up and down by guiding it through at least one vertical groove (8 ') provided in the fixed casing, providing that the pusher guiding means are additionally linked to pins (14) that play within helical grooves established in a second cylinder or axially established sleeve and internally to the fixed main cylinder, which is arranged on a series of bearings, so that it can rotate within said cylinder, second cylinder or liner that is integrally linked to a door ring. a (5) flush with the cylinder or main casing, determining the means of linking and turning the door. 2.- Mechanism for automatic door opening, according to claim 1, characterized in that the electric motor (26) is embodied in a 24V electric motor. 3 a.- Mechanism for automatic door opening, according to claim 1, characterized in that the electric motor (26) is linked to a transmission based on planetary gears with a transmission ratio of 46/1. 4 a.- Mechanism for automatic opening of doors, according to claim 1, characterized in that in the pusher bushing (3) there are two pin bushes (14) as well as two rollers (15), in diametrical arrangement, determining the means of vertical guiding for the pusher bushing (3) with respect to the main casing, as well as the rotation of the second casing through its helical grooves. 5 a.- Mechanism for automatic door opening, according to claim 1, characterized in that the helical grooves of the second casing have a path that determines a door opening angle of 100 degrees. 6.- Mechanism for automatic door opening, according to claim 1, characterized because the door ring (5) is secured to the second casing or cylinder with helical grooves (4) through a key (36). 1