GUIDING AND ROLLING DEVICE FOR COMPENSATING THE LOADS OF SLIDING DOORS

Abstract: Guiding and rolling device for compensating the loads of sliding doors, the device being comprised of a support for the rolling means embodided as a light casting hollow part (1), incased in a housing (T1) which is open on the lower side (T3) previously machined at the back of a door (T) (one at each end), comprising a vertical slit (11) for engaging a bogie or planar pivot (14), carrying a tandem of wheels (19) each with a rail-cleaner (20) and/or protector for the ball bearings incorporated to the pivot (14) and whose support (1) is internally provided with adjustment means (13a) for the pivot and wheels which are externally regulated, by manipulating a circular nut (13) and complemented with a set of sections integrated by a lower guide (23) with a double set of rails (23') and a third central rail (not sliding) (23'') for the second section (24) covering the rolling area and a special edge-guard section (26). The device applies specially to a set of sliding doors, particularly for built-in wardrobes.

Description: This invention refers to a GUIDING AND TRACKING DEVICE FOR A HEAVY SLIDING DOOR according to the preamble of claim 1, fundamentally based on a organ which may be embedded in a door panel's body and a regulable support for a set of wheels in tandem (paired in twos) for tracking, the center pin or bogie of which substantially coincides with the panel mass symmetry axis so that its loads are proportionally distributed and/or weighted on the bogie which, in turn, distributes them onto two load points which is the set of wheels forming the tandem. Sliding doors systems having a lower tracking rail have, among many other problems, a serious unbalancing defect due to the fact that their tracking members, mainly their supports, are assembled in offset positions in regard with the panel mass, namely in the panel's outer wall. The panel weight (an agglomerate coated with melamine, glass, metal sheet or others, with more or less 2 m 2 area, a thickness of 16 to 20 mm and an approximate weight between 20 and 50 kg), is an excessive burden for the two wheels, one in each end, which traditionally are the only supporting points for the door; this is a weak condition for distributing loads, the eccentricity of which has a clear tendency to tilt weight towards the opposed side to that of the tracking point, thus deforming the support and wheel axle. These unbalances force the wheel to have a tendency to loss its tracking geometrical center, which implies a continuous axle wear; besides, they force the door's upper edge, opposed to their position, to scratch against the upper guiding profile outer side which may eventually impdede that doors may be moved. STATE OF ART We may find examples of these peculiarities in the various tracking systems for sliding doors on a lower rail or track. We may identify, among them, the Spanish UTILITY MODEL 281,597 owned by P. CALVET which provides a system based on a single wheel laterally assembled on a flat iron which is in turn sidewise attached to the door panel by means of a metal bracket fixed onto said panel with a screw in its upper part aimed to regulate the bracket vertical position. The track is a profile with a single rail for each door fully open on one side. The door panel's high weight discharges in a sidewide, eccentric and unbalanced manner on the bracket and on a wheel axle end; it unbalances the wheel support and forces it to scratch, rather than to track, on the rail. Their excessive stress considerably shorten their life; the loading pressure tends to force the flat iron and bracket anchorages and consequently will eventually give rise to a complete lack of adjustment in the assembly. The tracking rail is unprotected and dust, residues and tiny objects built up on it which may mean an obstacle for sliding. In a further one, system COVALUX provided by Spanish Industrial Model 116,004 is analogous to the previous one; changes are in the complementary profiles design which relatively alter the sliding rail (variation B) although in practice the tracking organ and its attachment and assembly means are substantially similar to the previous design by P. CALVET. With reference to the prior art we will refer to the EP-A-0424549. Subject matter of this EP includes a housing 4 moulded in plastic material having almost a circular form. It houses a support 13 bearing only one wheel 18 which partially protudes off its housing. Support 13 has a guide shoe which slides on an "U" shaped female plastic rail 25. Support has holding transversal means 30 in housing 4. It is a simple organ which is assembled above and below the door. DE-A-3 623 378 of which EP-A-0 424 549 is a further development, describes a guiding and tracking device according to the preamble of claim 1. INVENTIVE ACTIVITY The aim of this invention is not only to solve in a more efficient, simple and nonexpensive manner the lack of compensation problems, but to reinforce the tracking organs means, thus guaranteeing not only load supporting but the track plan balancing and lining up, and designing means enabling that both support and rail and complementary means are easy to assemble, handle and maintain. The invention carries along, as well, a set of parts allowing to assemble the wheel tandem (paired in twos in each end) of each door in such a way that the rail be protected against filth, residues and other matter which usually build up on the lower guiding rail. It also incorporates a covering part for each tandem to act as lower sliding rail cleaner, thus protecting bearings at all times. Besides, the upper guide has been simplified while the edge protector has anti-scratching, anti-play means and also acts as door handle thus reducing the numner of parts to a minimum with all the advantages and solutions for their good performance. DESCRIPTION OF THE INVENTION This present invention comprises, according with its specification in claim 1, a regulating support for the tracking means, consisting in a hollow cast part which may be embedded in the door body which has previously been provided, to this end, with a box (mortise) or recess made in the door inner plan and open in its lower part to allow access for the bogie or wheels center pin. USEFUL EMBODIMENTS . A further detail is that of such mortise or recess has a design in double coupling in vertical projection to fit or immobilize the cast part-support which is embedded. A further detail is that such part has a hollow inner body, peripherally adjustable under pressure in the door mortise, covered by means of a front shield when its fixing means and provided in its inner part (hidden) with a support or hollow having a vertical pass for the vertical setting bolt which communicates with the lower slit (recess or depression) wherein the bogie or center pin, support for the wheels, is housed; the slit, having fixing and/or setting means for the bogie or center pin which will be located on the door cross section symmetry axis, approximately, thus symmetrically and proportionally distributing its loads. A further detail of the support is that it has, in coincidence with the hidden support (hollow), an opening or front recess wherein a (circular) nut having its surface fluted or knurled is housed, being transversed by the setting vertical bolt so that the bolt may be manually raised or lowered through said nut from the outside. A further detail of the support is that above such support it has, in its inner part, a centrer hollow or recess to enable setting the bolt and to avoid its swaying or displacing. A further detail of the bogie or center pin is that it has a ruptured part for the assembly means and it has transversal means for a set of tracking wheels in tandem (paired in twos), placed in a central position in regard with the door cross section. A further detail of the device is that it has a lower tracking rail duly closed on its sides, positionally reversably, which comprises a double set of parallel rails (four, two and two) for each door wheel tandem to slide and that it has between them a third rail, not usable for sliding, which has a prism section male edge to receive a longitudinal part to close or cover, as a dust guard, the lower rail. A further detail is that said dust guard is a removable "T" shaped part showing, in the vertical length top side, an engaging part having an inverted fork shape with an inner shape (silhouette) adjustable for its engagement under pressure on the center rail prismatic edge and the "T" horizontal length covering the rail upper recess, leaving a slit being sufficient for the bogie or pin to pass and slide and that by taking it out it allows free access to the rail inner part. A further specification of the device is that it has a single edge protecting part (for the door vertical edges) showing, on its front and outer side, reliefs or hollow rabbet (one closed and the other one open) by way of handle, and in its inner part an extensible resilient side to press on the door lining coating (metal, veneer, glass, paper, etc.) being able to cede on the panel width or section tightening itself to any section measurement up to a reasonable elastic limit, having provided it to this end in its lower apex with a notch to enable the elastic side expansion, competing it with a vertical housing for a dust guard part (mat) between the doors. A further detail is that said edge protector aiming to avoid scratching against the upper guide is formed of an embedded part (by way of tap) with protruding guides on each end, for instance made in an appropriate polycarbonate material. A further detail is that said upper sliding guide is highly simplied since it it limited to a simple "U" shaped profile with a center wall. An ampler idea of this device's characteristics is offered hereinafter with reference to the drawing sheet attached to this specification where in a somewhat schematic way and only by way of example, are represented the preferred details in this invention. In the drawings: Figure 1 is a perspective view of the embeddable support part seen from its rear side and of the box or recess to embed it. Figure 2 is a perspective view of the embeddable support part seen from its from side. Figure 3 is a perspective view of the embeddable support part embedded and with the wheels center pin or bogie assembled. Figure 4 is a section view of following the line I-I of figure 3. Figure 5 is a front elevation view of the center pin and a set or tandem of wheels. Figure 6 is a perspective view of the wheel cover - rail cleaner. Figure 7 is a side elevation view of a set comprising two doors and the complete set of profiles and parts. Figure 8 is an enlarged view of the vertical edge protector profile. Figure 9 is a plan view of a topping bracket related with said edge protector. DESCRIPTION OF DRAWINGS According with the above described drawings and making reference to the two first figures, they represent a part of the "T" panel for a sliding door provided or fitted with a box or mortise "T1" wherein the embeddable part (1) will be embedded. The hollow part (T1) has a double coupling (T2), preferably having a double lobulated section separated by an entering ridge or nerve (T43). Due to this reason, the embeddable part (1) has a dorsal prominence (2) with a double coupling (3) and an intermediate notch (3') adjusted to the cavity (T1) silhouette to be housed and immobilized therein. Said cavity (T1) is open on its base (T3). The embeddable support (1) is a single casting part defined by a front plate (4) which has some countersunks (10) for its assembling bolts and a center slot (11) closed on its upper part (11') and opened on its lower one (11") to house the wheel bearing center pin or bogie which will be assembled in the slot (11) means (8). Above the slot (11) is located the opening of a housing (7) for the nut (13) driving -up or down- the regulating bolt (13a) of the wheels center pin or bogie (14) fitted in its inner part (up and down) with holes (12) (12') for the said bolt (13a) to pass. The ceiling (6) of said housing (7) is connected and associated through its inside part with a gap (5) in the prominence (13) for introducing, housing and guiding the regulating bolt (13a) head. Figures 3 and 4 show the embedding of the support part (1) provided with the pivoting part (14) and the remaining mechanisms for regulating this bolt (13a) and circular nut (13). This nut (13) is housed in the recess (7) and the center pin (14) is frontally held by a screw (17a) set in the threaded hole (8) of support (1), through the slot (17) in said center pin (11). This has a void or offset (15) to move or deviate the center pin (14) vertical plan in such a way that the door panel symmetry axis (x-x) (figure 4) "T" passes through the center pin (14) lower length vertical axis (15a) wherein the axis (16) is assembled transversal to the hole (16a) (figure 5) for assembling the wheels tandem (19) (figures 4 and 5), the position of which will become fully centered in regard with "T" panel thickness. Additionally, the wheels set or tandem (19) is protected by a cowling (20) adjusted to the said tandem (19) volume format, provided with a slot (21) which is adjustable to the center pin (14) lower offset part (15a) and its topping parts are skids (22) which scratch on the rails (23') of the lower rail (23) (figure 7) thus exerting a very slight scratch on said rails to keep them permanently clean. Figure 7 shows a schematic view of the complex with a exploding view of all profiles which integrate the frame structure. This structure is formed of: a lower rail (23) or tracking rail; an upper profile or guiding rail; a covering or protecting profile (24) for rail (23); a common and single profile, edge protector or vertical profile (26) for the "T" door panels. Track (23) comprises a double set (in twos) of rails (23') each with their relevant wheels couples - tandems (19). Between these rails (23') there is a neutral rail (23") having a prismatic topping with facets (23a) (23b) by way of male linking for the covering profile (24). The covering profile (24) has a "T" shape. In the lower end of its vertical branch it shows an inverted "U" shaped fork having inside notches (24") by way of female linking aimed to house the neutral rail (23") prismatic edge so that the horizontal branch of profile (24) should cover the upper hollow part of rail (23) without impeding that center pins (14) may pass. The upper guide rail (25) is simply split into two equal parts by means of a wall. The edge covering profile (26) or vertical profile of panels (8) is an "U" shaped part having two hollow adjacent sides (26') (one open and the other one closed) and in the remaining side there is an elastic branch (26") slightly closed or convergent, provided on its inner apex with a notch or incision (26b) to guarantee the branch (26") elastic expansion and is topped with a slight blunt depression (26a) to enable the edge protector (26) setting by pressure on panel (T) and to press against the latter coating. The incision or notch (26b) provides branch (26") with an elastic coefficient being appropriate for adapting profile (26) to any kind of section of panels (T), according with an example represented by the dotted line (26d) of figure 8. On the opposed apex of branch (26") it shows a female guide (26c) for an anti-scratch joint or brush for cleaning panels (T). The hollow sides (26') outer edge (26e) has a depresion or recess to enable the door normal pushing, by way of handle. The edge protecting profiles (26) ends are closed with connecting plugs (27) (figure 9) having an "L" shape which is adjusted to the adjacent sides (26') silhouette with connecting protrusions (27') and (27") to fit in the hollows (26') and 26c) respectively and, besides, they have a cushioned surface (27a) to act as travel end stop damper for doors (T). Having suitably described this model nature, we should point out that it is not limited to the exact details shown in this specification but that, on the contrary, all those modifications deemed fit will be entered therein, providing they do not alter its essential characteristics as claimed below.

Claims: Guiding and tracking device for a heavy sliding door, said device comprising a support having means for housing and guiding a tandem set of wheels supported on a plain center pin, the center pin being fitted with means for attaching it to said support, track means along which the tandem set of wheels then slide in use when the track means is mounted either below or above a sliding door, side protection means or edge protectors and plugging means for these, characterized by the fact that said support is a hollow cast part (1), embeddable in a mortise (T1) provided at each end of a door back side (T) and opening through an edge portion (T3) thereof, said support having a slot or guide hollow part (11) to slidingly house the plain center pin (16) supporting tandems the set of wheels (19) and incorporating a rail cleaning element and/or protector (20) for every tandem set of wheels and for both rails (23'), which support (1) is provided in its inner part with regulating means (13a) for regulating the leight of the plain center pin (16) which are operable from the outside the support by means of a nut (13). Guiding and tracking device for a heavy sliding door, according with claim 1, comprising an embeddable moulded support (1), characterized by the fact that it has a dorsal prominence (2) which is embeddable, split into two analogous sections (3) with an entering intersection (3') and an outer shield (4) having fixing means (10), provided with a housing or cavity (6) containing as regulating means a handling circular nut (13) traversed both insidewise and vertically by a bolt (13s) entering through an upper gap (5), inside to said housing (6) linking with the hollow part (11) wherein the center pin (14) is housed. Guiding and tracking device for a heavy sliding door, according with claim 2, comprising a nut (13a), characterized by the fact, is a circular nut (13a) fluted and knurled on its outside. Guiding and tracking device for a heavy sliding door, according with claim 2, comprising a center pin (14) formed by a plain slotted flat iron (17) and by fixing means (18) to the threaded hole (8) of slot (11) in the support (1), characterized by the fact that the center pin (14) has an entering offset (15) to center its own vertical axis with that of the panel (T) and has means (16) to receive and hold a set of wheels (19) in tandem, paired in twos. Guiding and tracking device for a heavy sliding door, according with claim 1, comprising a rail cleaning and protecting device (20), characterized by the fact that the rail cleaning and protecting device (20) is a slotted plate part (21) to be assembled by pressure onto center pin (14) having, at least, two lateral protect-ing flaps and at least four tongues (22), two on each end, for cleaning rails. Guiding and tracking device for a heavy sliding door, according with claim 1, comprising the lower sliding means, characterized by the fact that it has a double set of rails or tracks (23') (a set per door) and between them a (nonsliding) rail which has its upper edge in prismatic section (23a) (23eb) by way of male linking. Guiding and tracking device for a heavy sliding door, according with claim 6, comprising a lower rail (23) having linking means (23a) (23b), characterized by the fact that it has a covering or dust guard profile (24) provided with a top in fork shape (24') having inner notches (24") to embed by pressure on the, nonsliding, rail (23") linking means (23a) (23b). Guiding and tracking device for a heavy sliding door, according with claim 1, comprising upper sliding means (25), characterized by the fact that the upper sliding means (25) are formed by a simple "U" shaped profile with an inner wall (25') dividing it into two equal parts. Guiding and tracking device for a heavy sliding door, according with claim 1, comprising lateral protection or edge guard (24), characterized by the fact has a vertical guard protector profile (26) in "U" shape provided with two hollow adjacent sides (26'), one open and the other one closed, with a recess or depression in its outer edge (26e) by way of handle, and a simple opposed side slightly closed or convergent provided with a notch or incision (26b) in its inner apex to enable said side (26") elastic expansion to open "U" more or less; and has an outsidewise void or bend (26a) in its free end and a female guide (26c) for a joint in its outside apex. Guiding and tracking device for a heavy sliding door, according with claims 1 and 9, comprising plugging means for the edge guards characterized by the fact that they are synthetic moulded parts in "L"shape (27) with plugs or protrusions (27') (27") having a silhouette adjusted to the edge guard (26) hollows (26') and 26"), respectively, to connect by pressure with these, having an oustide cushioned edge (27a) as bumper stop.

Inventors: GARCIA HERNANDO M DEL ROSARIO, GARCIA HERNANDO, M DEL ROSARIO
Applicants: AZNAR ESCOLANO ROCIO, AZNAR ESCOLANO, ROCIO
Application year: 1993
Main classification: E05D15
IPC codes: E05D15, E05F5