FR2541717A1 - Device for the linear drive of at least one element, such as a door of a vehicle, lift or the like - Google Patents

Abstract

The device is intended to drive a single or double element, such as a leaf or two leaves 1 and 2 of a door, especially of a lift car, in two successive opposite movements: opening, then closing. It comprises two opposite racks 33 and 34, the toothed faces of which are horizontal and which are fixed to two carriages 30 and 31 sliding in U-shaped guides 15-16 and 17-18. The carriage 30 drives the leaf 1 by means of a rod 13, and the carriage 31 drives the leaf 2 by means of a rod 14. The two racks 33 and 34 are driven by a pinion 37 mounted on the shaft 38 of the motor 39, and the axis a common to these three elements is horizontal.

Description

DEVICE FOR LINEARLY DRIVING AT LEAST ONE
ELEMENT SUCH AS A VEHICLE DOOR, ELEVATOR
OR SIMILAR.

 The present invention relates to a simple, compact and efficient device with which one can achieve the perfect operation of a linearly movable element such as a sliding door or panels "articulated" accordion.

A device according to the invention is remarkable with regard to its small size and the silence of its operation, consequence of the absence of vibrations, shocks and games
This device is particularly well suited to the equipment of elevator cabins, to control the doors.

Currently the control of these doors is generally constituted by a hydraulic cylinder whose rod is coupled to a door element or an electric motor driving a connecting rod, also coupled to a door element
Such an assembly is well suited to the control of sliding doors, possibly telescopic, equipping cabins of relatively large size and for new installations.

 In the case of small cabins and, in particular, in installations in old premises, simpler and more compact mechanisms must be used because, in this case, there are very strict dimensions.

 Among these, it is necessary to mention the one that is related to the regulation concerning the "reserve", that is to say the free space which must obligatorily remain between the ceiling of the "hopper" or "cage of elevator "and the highest part of-s organs located on the roof of the cabin, when it is stopped on the highest floor.

 This reserve is essential to avoid any accident to the maintenance personnel who, having to intervene on the roof of the cabin, could be crushed if, inadvertently, the cabin Xtaite sent to the last floor and if it subsist was a too small distance between the ceiling of the hopper and the d-essus of the cabin.

 For example, in France, this reserve must be at least 300 mm for installations in old buildings and with cabins moving at less than 0.6 meters / second.

However, it is precisely on the roof of the cabin that is the natural place of the equipment for opening the doors, because the interior of the cabin must be the largest possible and completely clear of all could be a nuisance, an obstacle or a danger
As for the sides that frame the door, they are practically unusable because they have to provide the necessary space, outside the cabin, for mechanisms such as those that control the por tierions.

 In addition, when the car door opens symmetrically into two halves, the laterally placed mechanism should have a control gear for the door half opposite it.

 It is with these considerations in mind that the door control mechanisms are placed in a pediment, above this door, and protrude beyond the actual roof of the cabin.

 Another criterion imposed is the internal clear height of the cabin.

 To accommodate a large device on the roof of the cabin, while respecting the mandatory reserve, one could think to reduce the interior clear height of the cabin.

 But this is only possible if the remaining height is at least 1m90.

 Therefore, a control of elevator car doors has a location dictated by its function above the door and must be as flat as possible to take the least height possible and preserve the reserve.

 Vehicle door controls must also comply with constraining congestion requirements and, although they are not subject to the same regulations as those of lifts, they must meet similar technical criteria that lead to their location, here again9 in pediment, above the doors.

 The present invention allows to achieve a command that meets the requirements of space exposed above and which, in addition, has a particularly smooth and quiet operation.

 To this end, the invention relates to a device intended to drive all or part of at least one element such as a vehicle door, elevator and the like in two successive opposed linear movements, of the type comprising a motor whose shaft carries a pinion meshing with at least one crest extending parallel to the direction of movement of the element and secured to a movable carriage which is kinematically connected to a sliding element and which is associated with guides rectilinear, parallel to the rack, characterized in that the toothed face of the or each rack is in a plane perpendicular to that in which the movement of the element must take place and parallel to two bearing faces of the guides rectilins each corresponding to two opposite sides of the carriage 5 the axis of the motor being perpendicular to the plane in which the movement of the element must take place.

According to other features of the invention - each rectilinear guide consists of a U-shaped profile
whose oar constitutes a slip path by contact
direct for a straight side of a cart inserted on
its entire length between the two wings of the Uo - the device which must drive in opposite directions two
separate compartments, it has two trolleys that are located
in two parallel planes and each carrying a creative
mesh on that of their faces which is opposite
on the other, the two racks being offset and in
taken with diametrically opposed teeth of a single
pinion cald at the end of the motor shaft, this ar
passing through one of the carriages perpendicular to the
plan of it by an oblong opening of long axis
parallel to that of the racks.

 Referring to Figure 1, there is shown a diagram indicating the main dimensional constraints that must be taken into account to achieve an elevator door control device.

 Cabin A of the elevator is supposed to stop at level B of the highest floor of a building.

 Its height being H, the theoretical reserve is R, that is to say the distance measured between the top of the cabin A and the ceiling C of the hopper D.

 In reality, the roof of cabin A carries different mechanisms: stirrup, fastening devices E cables etc ...

 The reserve r is thus measured between the highest part of the bodies located on the roof of cabin A and the ceiling C.

 Any mechanism on the 1-cabin roof must be as flat as possible.

 Referring to the other figures of the drawing we see a device according to the invention applied to the control of elevator doors of the type comprising two leaves 1 and 2 articulated to the cheeks 3 and 4 of an elevator car by hinges 5 and 6 and each comprising two panels 7-8 and 9-10 hinged together by hinges 11 and 12.

 The panels 8 and 10 carry, in the vicinity of their free side, a vertical rod respectively 13 and 14.

 It will be understood that by bringing the rods 13 and 14 closer and horizontally apart, the doors are opened and closed by folding and unfolding the panels 7-8 on the one hand and 9-10 on the other hand. along the hinges 5> 11 and 6-12.

 For this, a chassis is formed comprising rectilinear U-section guides, located in pairs facing each other.

 The lower guide 15 corresponds to the upper guide 16 and the lower guide 17 corresponds to the upper guide 18.

 The souls of the U of the two lower guides 15 and 17 are located in the same horizontal plane P1 and those of the U of the two upper guides 16 and 18 are located in the same horizontal plane P2 also and, therefore, parallel to the plane P1 (Figure 2 ).

 The guides 15 and 17 are spaced from each other and the rods 13 and 14 are engaged in the space 19 thus created.

 The width of this space 19 and the thickness of the rods 13 and 14 must be chosen so that only the minimum clearance remains compatible with the free movement of the rods 13 and 14 in the space 19, in particular to avoid beats. noise generators.

 Of course, the upper guides 16 and 18 are spaced in the same way since they must be exactly in line with the lower guides 15 and 17.

 Thus arranged, the guides are joined by vertical end plates 2Q and 21 provided with lateral returns 22-23 and 24-25. Above the upper guides 16 and 18, is placed a plate 26 contributing to the rigidity of all seem but intended, especially, to oppose the entry of dust into the device.

 In the pair of guides 15-16 is engaged a carriage 30 by the two longitudinal edges of a rectangular plate which is consti-killed.

 In the pair of guides 17-18 is engaged a carriage 31 similar to the previous but traversed by an oblong opening 32 whose major axis is parallel to the axis of the guides 15 to 18.

 The height of the carriages 30 and 31 and the spacing of the guides 15-16 on the one hand and 17-18 on the other hand are established so that only the clearance necessary for the free sliding of the carriages in the guides remains, and especially by avoiding that this possibly virtual game can allow beats.

 The thickness of the plates which constitute the carriages 30 and 31 and the internal width of the guides, measured parallel to the core and from one wing to the other of the U, are established to avoid, here too, any substantial play. and all beat.

To ensure a smooth and silent sliding of cha
30 and 31 in guides 15 to 18, these are advantageous
made of a self-lubricating material such as
polytetrafluoroethylene (known in the trade under the sea
that deposited "TEFLON") preferably loaded with carbon.

On their faces facing each other, the
carriages 30 and 31 each carry a respective rack
33 and 34, offset in height and whose toothed faces
35 and 36 face each other.

The two creams, llères 33 and 34 are therefore in the same
vertical plane P3 (Figure 2), which coincides with that in
which the horizontal movement of the rods 13 and 14 must have
place.

Correlatively, the toothed faces 35 and 36 are located
in two distinct horizontal planes ie perpen
diculaires in plane P3.

These horizontal plans are therefore parallel to the plans
P1 and P2 in which are located the souls that make up
the bearing and sliding faces of the carriages 30 and 31.

The racks 33 and 34 are engaged with teeth
diametrically opposed one single pinion 37, wedged to the ex-
tremity of a shaft 38 of a motor 39, this shaft 38 passing
in the opening 32, so as not to oppose the free soft
trolley 31.

 It is noted that the axis a of pinion 37, shaft 38 and motor 39 is horizontal, ie perpendicular to the planes of carriages 30 and 31 and parallel to planes P1 and P2 of the bearing surfaces of the guides. 15 to 18.

Thanks to this arrangement, we obtain a result of a
very great practical importance as it will appear
explanations below.

With the engine 39 stopped, whatever the posi
trolleys 30 and 31, these are based on the guides
lower 15 and 17.

The vertical game (as small as it is) is at the
upper part of the trolleys 30 and 31.

When the motor 39 is started, the pinion 37 in
train the racks 33 and 34 and the carriages 30 and 31 which they are integral, in two opposite directions, hori zontalement.

 This action causes a reaction of the racks 33 and 34 which tend to deviate from each other, vertically, as well as, consequently, the trolleys 30 and 31.

 We see that this has the effect of applying the top of the carriage 30 against the upper guide 16 and the underside of the carriage 31 against the lower guide 17 over the entire length of the carriages 30 and 31. The effort is distributed, regular and without jerks, so that the sliding of the carriages 30 and 31 in the guides 15 to 18 is not affected by the reaction of the mechanisms when the motor 39 is started.

 The pair developed by the pinion 37 is in the vertical plane P3 quiet that of the axis of the racks, the axis of the space 19 and liaxe of the rods 13 and 14, that is to say the movement of these last when opening and closing leaves 1 and 2.

 The carriage 30 carries a horizontal plate 40 pierced with a hole in which the rod 13 is freely engaged, with a clearance Just necessary for the relative pivoting of the rod 13 and the plate 40.

 The lower rack 34 is pierced by a vertical hole in which the rod 14 is engaged under the same conditions as the rod 13.

 In this way, the opposite horizontal linear movements of the carriages 30 and 31, resulting from the rotation of the pinion 37, are transmitted to the rods 13 and 14 which move horizontally, being guided in the space 19 by the outer walls in turn. keeping the lower guides 15 and 17.

 Thanks to the direct mounting of the carriages 30 and 31 on the guides 15 to 18, the mechanical forces are distributed over the end of points of the length, that is to say that a wide range is obtained. and continues, unable to cause, practically, any noticeable noise.

 This silence is not disturbed during start-up and stopping of the motor 39, since the movements of the pinion 37 tend to apply the trolleys 30 and 31 on their respective guides and not to separate them.

 In addition, this provision has very positive repercussions vis-à-vis the size of the device.

 Indeed, the height of the chassis measured from the upper face of the dust plate 26 to below the lower guides 15 and 17, is of the order of 150 millimeters and the top of the motor 39 is at most at same level, and rather below the level of the dust-proof plate 26, so that a device according to the invention is easy to place on a cabin, be it an old installation-or of a new installation.

 The invention also finds other applications than the control of elevator doors: vehicle doors such as trains, subways, au-tocars, cable car cabins, automatic building doors, hatch covers, sunroofs, etc.

 Note that the invention is applicable to the entralnement of one or more elements, which means, for a door, a single leaf or two leaves.

 This or these elements must move in two successive opposite movements corresponding, for a door, opening and closing.

 When there are two leaves, the first movement (opening) is double and simultaneous for both leaves. it is the same in the second movement opposite and subsequent to the first (closing3.

Claims (3)

 1-Device for driving all or part of at least one element such as a vehicle door, elevator and the like in two successive opposed linear movements, of the type comprising a motor (39) whose shaft (38) carries a pinion (37) engaged with at least one rack (33-34) extending parallel to the direction of movement of the element (13-14) and integral with a movable carriage (30-31) which is kinematically connected to a sliding element (13-14) and which is associated with rectilinear guides (95-16 and 17-18) parallel to the rack (33-34), characterized in that the toothed face of the, or of each rack (33-34) is in a plane perpendicular to that in which the movement of the element (13-14) must take place and parallel to two bearing surfaces of the rectilinear guides (15-16 and 17-18 ) each corresponding to two opposite sides of the carriage (30-31), the axis (a) of the motor (39) being perpendicular to the plane P3 in which the movement of the element (13-14) must take place.  2- Dipositif according to claim 1, characterized in that each rectilinear guide (15 to 18) is constituted by a U-shaped section whose core constitutes a sliding path by direct contact for a rectilinear side of a carriage (30- 31) inserted along its entire length between the two wings of the U.  3- Device according to claim 1, characterized in that to drive in opposite directions two distinct elements (13 and 14), it comprises two carriages (30 and 31) which are located in two parallel planes and which each carry a rack (33). -34) on that of their faces which is opposite the other, the two racks (33 and 34) being offset and engaged with diametrically opposed teeth of a single pinion (37) wedged at the end of the shaft (38) of the motor (39), this shaft (38) passing through one of the carriages (31) perpendicularly to the plane thereof by an oblong opening (32) of great axis parallel to that of the racks (33). and 34).