FR2853683A1 - Self-supporting motorized sliding gate, has casement that is maintained horizontally sliding on guides by driving unit that includes gear motor that drives sprocket engaged with toothed rack - Google Patents

Abstract

The gate has a casement (1) that is maintained horizontally sliding on guides by a driving unit (2) to facilitate the opening and closing of the casement. The driving unit has a gear motor that drives a sprocket which is engaged with a toothed rack (11). The gear motor is mounted on an oscillating cradle that oscillates around an axis de-centered and perpendicular to the direction of displacement of the casement.

Description

The present invention relates to a device for

  motorized self-supporting sliding gate.

  The gate device according to the invention is of the type comprising a leaf mounted to slide horizontally by sliding or rolling on guide means or not, associated with a drive gearmotor capable of allowing movement thereof during opening and closing.

  On gate devices of this type, the leaf generally consists of a vertical panel mounted on rolling means cooperating with a guide rail, while the drive means is fixed and comprises a pinion cooperating with a rack integral with the leaf.

  The pinion can be of vertical axis and be arranged laterally to the rack, or else of horizontal axis and be arranged above or below said rack.

  Whatever their embodiment, these devices are confronted with various drawbacks, in particular that of the continuity of the transmission of the movement, that is to say of the maintenance in contact of the pinion and the rack because of the problems of straightness of the floor, a disadvantage which is increased with wear and expansion phenomena, which is more when the leaf is very long.

  To overcome this drawback, transmission devices have already been proposed interposed between the drive means and the pinion, and provided with elastic positioning means, which remain relatively complex and unreliable over time.

  Others have proposed to mount the rolling means on shock absorbers, thus making it possible to suspend the leaf and to make a flexible connection between the rack and the pinion. However, in the long run, the shock absorbers lose efficiency, without the possibility of adjustment except to replace them, to the detriment of the connection between the rack and the pinion, which must withstand forces which may be detrimental to it.

  Furthermore, the aforementioned portal devices must also, for obvious security reasons, be provided capable of overcoming power failures, and allow the opening and / or closing of the portal manually.

  For this purpose, some have for example provided the possibility of retracting part of the rack thereby limiting the opening, this is the case for example of the device described in document FR 2,806,440, or else retract the drive gear or an intermediate gear.

  These devices work perfectly, however they are relatively complex and therefore expensive.

  The object of the present invention is to remedy the various aforementioned drawbacks by proposing a motorized self-supporting sliding gate device, making it possible to maintain a continuous transmission and to authorize a declutching for manual operation, while being of very simple design and therefore not very expensive. It will be noted that the motorization of the device according to the invention can be adapted on an existing portal.

  The motorized self-supporting sliding gate device 20 according to the invention is of the type comprising a leaf mounted to slide horizontally by sliding or rolling on optionally guide means, associated with a drive means capable of allowing movement in opening and closing , and which consists of a rack integral with said leaf and a pinion driven by a geared motor and which meshes with said rack, and it is essentially characterized in that said pinion is carried directly by said geared motor, which is integral with a cradle which is able to oscillate in a damped fashion around an eccentric axis 30 and perpendicular to the direction of movement of said leaf.

  According to an additional characteristic of the device according to the invention, the oscillating cradle is in the form of a plate, one side of which is articulated around the axis perpendicular to the direction of movement of the leaf, while the other side is retained. by an elastic means capable of bringing the pinion against the rack.

  According to another additional characteristic of the device according to the invention, the pinion is positioned under the rack, while the elastic return means pushes the plate upwards.

  According to another additional characteristic of the device according to the invention, the elastic return means consists of a spring.

  According to another additional characteristic of the device according to the invention, it comprises means able to allow the cradle to pivot in the direction opposite to the return of the elastic means, and to block said cradle in this position, so as to keep the pinion disengaged of the rack.

  The advantages and characteristics of the device according to the invention will emerge more clearly from the description which follows and which refers to the appended drawing, which represents a non-limiting embodiment thereof.

  In the appended drawing: FIG. 1 represents a partial schematic view in elevation of the gate device according to the invention.

  - Figure 2 shows a partial schematic elevational view of the same device in another configuration.

  Referring to Figure 1, one can see a motorized self-supporting sliding gate device according to the invention. It includes a leaf 1 provided with wheels 10 intended to roll on the ground S, possibly in a rail.

  The leaf 1 is held vertically between guides, not shown, and it is moved in longitudinal sliding by means of a drive means 2, which comprises a geared motor 20 capable of driving a pinion 21 which s meshes on a rack 11 longitudinally integral with leaf 1.

  According to the invention, the pinion 21 is carried directly by the gear motor 20, which is mounted on an oscillating cradle 3.

  The oscillating cradle 3 comprises a plate 30, one side of which is pivotally mounted on a bearing 31 by means of a pivot 32 with an axis perpendicular to the plane of the leaf 1, while a spring 33 recalls the plate 30 so '' apply the pinion 21 on the rack 11.

  In this figure, which represents a preferred embodiment, the pinion 21 is placed under the rack 11, while the spring 33 is disposed under the plate 30, on the side opposite to the pivot 32, and tends to push the plate 30 towards the 10 high.

  Note that in the embodiment shown, the spring 33 is placed under the plate 30 to push it up, but it could provide the same result by being placed above.

  Whatever the quality of straightness of the ground S, the pinion 21 is always meshed with the rack 11, so that the leaf 1 can be driven in opening or closing continuously.

  The device according to the invention is simple in design, and requires little maintenance. It is also possible to provide means for adjusting the spring, as well as for limiting its stroke.

  Referring now to FIG. 2, it can be seen that the gate device according to the invention comprises a means 4 for disengaging the motorization, which consists of a means capable of tilting the cradle 3 to disengage the pinion 21 from the rack 11, and to block it in this position, in order to allow manual maneuvering of leaf 1.

  In the embodiment shown, the disengaging means 4 is in the form of a lever 40 capable of controlling a cam 41 pivotally mounted and able to bear on the top of the plate 30.

  Of course the declutching means 4 can be produced according to different constructions, the main thing being to allow the disengagement of the pinion 11 and the blocking in this position.

  The gate device according to the invention can thus be easily disengaged by means of a simple and inexpensive mechanism.

  Another advantage of the device according to the invention will be noted, that of preventing an unauthorized opening of the leaf. Indeed on existing motorized gates it is often possible to decouple the rack and the drive means by lifting the leaf, which allows the maneuvering of the latter. With the device according to the invention, due to the preload of the spring 33, the lifting of the leaf does not allow disengagement of the pinion which continues to play its role of lock.

  It goes without saying that the present invention cannot be limited to the preceding description of one of its embodiments, capable of undergoing some modifications without departing from the scope of the invention.

Claims (5)

  1) Self-supporting motorized sliding gate device of the type comprising a leaf (1) mounted to slide horizontally by sliding or rolling on optionally guide means, associated with a drive means (2) 5 capable of allowing movement in opening and in closing, and which consists of a rack (11) integral with said leaf (1), and in a pinion (21) moved by a geared motor (20) and which meshes on said rack (11), characterized in that said pinion (21) is carried directly by said geared motor (2), which is integral with a cradle (3) which is capable of oscillating in a damped manner around an eccentric axis (32) and perpendicular to the direction of movement of said leaf (1).   2) Device according to claim 1, characterized in that the oscillating cradle (3) is in the form of a plate (30) one side of which is articulated around the axis (32) perpendicular to the direction of movement of the leaf (1), while the other side is retained by an elastic means (33) able to return the pinion (21) against the rack (11).   3) Device according to claim 2, characterized in that the pinion (21) is positioned under the rack (21), while the elastic return means (33) pushes the plate (30) upwards.   4) Device according to claim 2 or claim 25 3, characterized in that the elastic return means consists of a spring (33).   5) Device according to any one of the preceding claims, characterized in that it comprises means (4) capable of allowing the cradle (3) to pivot in the direction opposite to the return of the elastic means (33), and to lock said cradle (3) in this position, so as to keep the pinion (21) disengaged from the rack (11).