FR2664643A1 - Device for manually opening (or closing) an electrically controlled up-and-over door in complete safety - Google Patents

Abstract

Device for manually opening (or closing) an up-and-over door in complete safety, characterised: - on the one hand, in that the auxiliary output shaft (3) of the electric control motor (2) comprises a toothed bevel wheel (10) intended for cooperating with two planet gears (toothed satellites) (11, 12) held disengaged by a spring (13), each planet gear (11, 12) being fixed to a shaft, one of these shafts passing through the wall (1) in which the up-and-over door is arranged and the other being pointed in the opposite direction, the end (E) of each of these two shafts (20, 21) having a means intended for fixing it temporarily and for actuating it by means of the emergency crank handle (25); - and, on the other hand, in that the assembly has a means (40) capable of cutting off the supply current of a motor (3) during the entire repair phase.

Description

DEVICE FOR MANUALLY OPENING (OR CLOSING) SECUALLY
RITE A TILTING DOOR, ELECTRICALLY CONTROLLED.

 The invention relates to a device for manually opening (or closing) safely an electrically operated overhead door; it also relates to overhead doors fitted with such a device.

 As is known, a "tilting door" is a door whose lap, formed by one or more panels, is controlled in movement either by hand, but more generally by an electric motor.

 In the event of interruption of the electrical current, to ensure the manual closing (or opening) of the door, use is made of a crank or the like which actuates the auxiliary output shaft provided for this purpose in the electric control motor. Although widely used and for a very long time, this device has mainly two drawbacks. First, the output shaft, actuated by the crank, is arranged on one side of the wall in which the door is formed. In this way, if the user is located on the other side of this wall, he cannot release the door by opening the lap, since he does not have access to this output shaft. In addition, if during the manual actuation maneuver by the crank, the current unexpectedly returns, this may cause accidents.

 The invention overcomes these drawbacks. It relates to a manual opening (or closing) device in safety for a tilting door, controlled by an electric motor, and whose emergency recovery is actuated manually by a crank or the like which is of a simple, easy embodiment to set up, efficient and accessible from both sides of the wall in which said door is formed.

This device is characterized
- On the one hand, in that the annex output shaft comprises a toothed bevel gear, intended to cooperate with two toothed satellites kept disengaged from the gear by a spring, but capable of being engaged in the bevel gear by compressing this spring , each satellite being integral with a tree, one of which crosses the wall in which the tilting door is provided and the other of which is directed in the opposite direction, the end of each of these two trees having a means intended to secure it temporarily and to operate it by the emergency crank
- And secondly, in that the assembly has a means actuated by the engagement of a satellite in the toothed pinion, capable of cutting the power supply current to the motor during the entire troubleshooting phase.

Advantageously, in practice
- the clutch spring is compressed under the effect of a push exerted by hand on the shaft attached to the satellite concerned
- the two satellites are diametrically opposed on the toothed pinion
- the two satellites are angularly offset on the toothed pinion
the clutch spring is formed by two spiral springs arranged in series, but in opposite directions, the assembly also having a bar coaxial with said spring, the length of which is less than the interval between the two disengaged satellites, but is greater than the interval between these two satellites when only one of them is engaged, so that when this satellite is engaged, the other satellite can no longer be engaged
- The means capable of cutting the motor supply current during the entire troubleshooting phase, comprises a lever whose head is disposed in the vicinity of the corresponding satellite, whose base is articulated on an axis and whose body actuates a grout bucket which in turn activates an arm that opens (or closes) the electrical contact.

 The manner in which the invention can be implemented and the advantages which result therefrom will emerge more clearly from the embodiment which follows, with the support of the appended figures.

 Figure 1 is a schematic summary view of a device according to the invention.

 FIG. 2 is a schematic sectional view of such a device shown in plan view in FIG. 3.

 Figure 4 is a schematic representation of a device of the invention during operation.

 Referring to the figures, the reference (1) designates a wall, a wall or the like, in which the tilting door is formed, the valve of which is controlled for opening or closing by an electric motor (2) gearmotor , and more precisely by a conventional system from the control shaft (3) from this motor (2). The motor (2) is generally placed inside (I), while the panel faces the outside (E). In known manner, the geared electric motor (2) comprises an annexed output shaft (3).

 According to the invention, this annexed output shaft (3) has a toothed bevel gear (10), which cooperates with two bevel gear satellites, respectively (11) and (12), kept disengaged on the gear (10) by a spring. spiral (13). The teeth respectively (14,15) of the satellites, mesh in the teeth (16) of the bevel gear, at least during the compression of the spring (13).

 Each satellite (11,12) is integral with an opposite shaft (20,21) respectively, the end of these trees (22,23) having end pieces intended to receive the end piece (24) of the crank ( 25). According to a first characteristic of the invention, the shaft (20) passes through the wall (1) and opens onto the outside (E), while the opposite shaft (21) is accessible from the inside (I).

 According to a second characteristic of the invention, the assembly also has a member (40) actuated by the engagement of a satellite (11,12) in the toothed pinion (10), capable of cutting the power supply current. of the engine (2) during the entire manual troubleshooting phase, so as to avoid inadvertent starts, a source, as already mentioned, of accidents.

 This member (40) shown in Figures 2 and 4 is constituted by a plate (41) disposed between the two satellites (11,12) carrying on each side an axis foot (42,43), on which is articulated around an axis a lever, respectively (44,45) comprising a head (46,47).

Each lever is associated with a bucket grout respectively (50,51), capable of being actuated by the pivoting of the levers (44,45) to come to bear on two arms respectively (52,53) pivotally mounted on a base ( 54) conductive, and having at their free end electrical contacts (54,55) intended to cooperate (to close or open) with a second pair of contacts (56,57), ensuring the supply of current into the motor (2 ).

 In the rest position, under the effect of the spring (13), the satellites (11,12) are disengaged. In this way, when the electric control motor (2) operates, the bevel gear (10) is driven idle without driving the satellites (11,12).

 Most generally, the two satellites (11,12) are diametrically opposed on the toothed pinion (10). It goes without saying that if the configuration and access require it, the satellites (11,12) can be angularly offset by a value other than 180.

 Advantageously, the spiral spring (13) is formed of two actual spiral springs (31,32) arranged in series but in opposite directions, associated with a radial plate (33) forming a stop. The two opposite elementary springs (31, 32) are coaxial with a slightly translatable tubular wedge (35).

 The bar (35) coaxial with the spring (30,31,32) has a length less than the interval between the two disengaged satellites (Figure 2), but greater than the interval between these two satellites (11,12) when l 'one of them (11) is only engaged (see Figure 4). It follows that when a satellite (11,12) is engaged in the bevel gear (10), one cannot engage the other satellite (12) disposed on the other side of the plate (41).

This prevents operators who would be placed on either side (E) and other (I) of the wall (1) from trying to operate the door, which would neutralize their efforts.

 The pinions (14,15,16) are designed to allow rotation on one side only.

 The device operates as follows.

 In normal operation, the opening and closing of the panels of the lap, not shown, is controlled by the electric motor (2).

 In the event of a power failure, the user, depending on the side of the wall (1) where he is located, grasps the crank (25) arranged on the side (E) or (I) of this wall and engages in the appropriate nozzle (22) or (23). This causes a force (F1) or (F2) which compresses the spring (13) and (Figure 4) meshes the teeth (14) of the satellite (11) in the teeth (16) of the bevel gear (10). In doing so, the head (46) of the lever (44) which, at rest, bears on the interior surface (17) of the satellite, is moved (see FIG. 4) inwards in the direction indicated by the arrow (F3) parallel to (F1). During these movements, the slide (50) rests on the arm (52), so that the contact (54) is distant from the contact (52). It follows that the electric current is interrupted and that the electric motor (2) is thus short-circuited. In this way, even if the power is restored during the manual operation, the motor (2) will not be supplied electrically.

 The device according to the invention is easy to build, simple, effective, and accessible from both sides of the wall, which we did not know hitherto.

In addition and above all, it operates in full safety, since it prevents actuations of the door control motor, in the event of untimely restarting of the electric current.

 This device can be used on all overhead doors of any type whatsoever, electrically controlled, such as doors suspended in the center, with hinged section, type "wallet", type "guillotine" or others.

Claims (6)

 1 / Device for manually opening (or closing) a tilting door securely, the closing (or opening) of which is controlled by an electric motor (2) having an output shaft (3) annex, and the emergency recovery of which is actuated manually by a crank or the like, characterized:  - on the one hand, in that the annex output shaft (3) comprises a toothed bevel gear (10), intended to cooperate with two toothed satellites (11,12) kept disengaged from the gear (10) by a spring ( 13), but capable of being meshed in the bevel gear by compressing this spring (13), each satellite (11,12) being integral with a shaft, one of which crosses the wall (1) in which the tilting door and the other of which is directed in the opposite direction, the end (E) of each of these two shafts (20,21) having a means intended to secure it temporarily and to actuate it by the emergency crank ( 25)  - And secondly, in that the assembly has a means (40) actuated by the engagement of a satellite (11,12) in the toothed pinion (10), capable of cutting the supply current to the engine (3) during the entire troubleshooting phase.  2 / Device according to claim 1, characterized in that the compression of the clutch spring (13) is effected under the effect of a thrust exerted by hand on the integral shaft (20) of the satellite concerned.  3 / Device according to claim 1, characterized in that the two satellites (11,12) are diametrically opposite on the toothed pinion (10).  4 / Device according to claim 1, characterized in that the two satellites (11,12) are angularly offset on the toothed pinion (10).  5 / Device according to one of claims 1 to 4, characterized in that the clutch spring (13) is formed of two spiral springs (31,32) arranged in series, but in opposite directions, the assembly having in in addition to a bar coaxial with said spring, the length of which is less than the interval between the two disengaged satellites, but is greater than the interval (I) between these two satellites when only one of them is engaged, so that when this satellite is engaged, we can no longer engage the other satellite.  6 / Device according to claim 1, characterized in that the means (40) capable of cutting off the supply current to the motor during the entire troubleshooting phase, comprises a lever (44,45) whose head (46,47) is arranged in the vicinity of the corresponding satellite, the base of which is articulated on an axis and the body of which actuates a slide (50,51) which in turn actuates an arm (52,53) which opens (or closes) the electrical contact .