Assemblable frame for doors, sliding doors and similar of veneered type with prefabricated components and relevant method

Abstract: A frame for doors, sliding doors and similar of the veneered type comprising a multiplicity of cross-members (2) suitably formed and capable of acting with their outer surface as supports for finishing panels (9), the free ends (2a, 2b) of which are provided with joining devices (4, 4a, 5) capable of engaging with matching joining devices (6, 6a) of sections (7) extending lengthwise over the full height of the door or similar and provided with shaped seats (7b) capable of overlapping the free edges (9a) of such panels (9) in order to cooperate in the retention thereof and impart protection thereto.

Description: The object of this invention is an assemblable frame for producing panels, doors and similar of the so-called veneered type. It is known that in joinery practice it is possible to make panels, sliding doors, doors and similar of the so-called veneered type, that is, consisting of a series of cross-members produced in various configurations, dimensions and materials, the ends of which terminate in an edge-frame that stiffens the frame thus formed, to which there are then glued flat covering layers such as sheets of plywood, veneers and similar. Exemples of doors according to the prior art are disclosed in DE-C-532 091 and CH-A-241 174. Such technique makes it possible to obtain panels of very low weight with a high degree of finish and indeformability in the course of time. However, because of the difficulty of implementing such technique, which calls for highly skilled personnel, precision work and careful selection of the materials to be joined, resulting in higher costs, the technique has in practice become obsolete. There is therefore posed the technical problem of producing a frame capable of being assembled in an easy and repeatable manner, even by unskilled personnel, to which it is possible to apply in a likewise easy, quick and repeatable manner finishing layers for the purpose of forming doors, panels, sliding doors or similar of the so-called veneered type. The frame according to the invention should moreover be made of inexpensive materials readily available on the market and easy to shape according to the desired features and dimensions, even outside normal standards. Such problem is resolved according to this invention by a frame for doors, sliding doors and similar of veneered type according to the characterizing part of claim 1. In a further embodiment of the invention the longitudinal sections are of symmetrical form relative to a transverse axis and are provided with seats for the reversible fitting of hinges arranged in such a way as to allow the operation of the door with right-hand or left-hand hingeing and inward or outward opening. A further object of this invention is a method of producing a door or similar by means of a frame according to the foregoing description which comprises the following phases: a) preparation of cross-members of suitable form in plan and with lateral edges ready for gluing; b) presetting in horizontal plane of a first flat-surface panel; c) supporting, at preset intervals, of such cross-members with their lower edge on the flat surface of such first panel; d) supporting of a second flat-surface panel on the upper surface of such cross-member; e) bending of both panels to a preferred shape, for example with a flat, convex or concave surface; f) gluing of the panels to such cross-members with possible curvature of the surfaces; g) application of the longitudinal sections to the flanks of the door thus obtained; h) finishing of the external surface of the panels. Further features may be noted from the following description of a representative but non-exhaustive example of implementation, with reference to the attached drawings which show: in fig. 1 : a cutaway view of a door made with a frame according to this invention; in fig. 2 : a cross-section taken on plotting plane II-II of fig. 1; in fig. 3 : a cutaway view taken on plotting plane III-III of fig. 1; in fig. 4a: the door at the assembly stage shown in exploded view; in fig. 4b: the partly assembled door; in figs. 5a and 5b : two examples of an outward-opening door with right-hand or left-hand hingeing. As shown in the figures, the door according to this invention is comprised of a frame 1 consisting of a series of cross-members 2 located parallel to one another at a preset distance in a vertical sense, the opposite ends 2a,2b of which are symmetrically formed with two shaped projections 3 parallel to which and in an inner position relative thereto extend two flexible tongues 4, provided with inward-projecting teeth 4a which form, with such projections 3, two pairs of grooves 5 capable of accommodating and retaining, following bending and subsequent resetting of such flexible tongues, two matching projecting tabs 6, provided with matching teeth 6a, of a lateral section 7 which extends lengthwise over the full height of the door and is therefore capable of retaining all the cross-members 2 forming a lateral sealing edge. In a preferred form of implementation cross-members 2 are comprised of a section made of plastic material internally stiffened by a lattice 2c and by a solid crosspiece 2d. Such lateral section 7 has additionally a head 7a in which are located two pairs of seats 7b and 7c, the purpose of which will become more clearly apparent from the following. As illustrated in figs. 4a and 4b, once having placed in alignment a series of cross-members 2 there are applied thereto finishing panels 9, initially flat and then curved in order to adhere to members 2 to which they are subsequently glued; longitudinal sections 7 are fitted by pressing tabs 6 into grooves 5 where they are locked by means of the said flexible resetting of tongues 4 and the reciprocal engagement of teeth 4a and 6a. During such joining procedure the free lateral edges 9a of panels 9 become inserted in seats 7b which cooperate in retaining such panels while at the same time imparting protection to the panels themselves. In such seats 7c it will also be possible to insert hinge units 10 which, by cooperating with non-illustrated matching members applied to fixture 11 of the door, allow the rotation thereof for opening and closing; additionally, as a result of the special symmetrical configuration of longitudinal section 7, such hinges may be applied in such a way as to achieve reversibility of the door, which may be arranged for opening outward to the right (fig. 5a) or to the left (fig. 5b) or symmetrically inverted for opening inward, not illustrated. As can be noted from the figures, a frame according to the invention makes it possible to achieve with simple and rapid assembly operations doors and similar of any cross-section by prearranging the form of the cross-members which, in the example described, have both their outer supporting surfaces of convex shape, this representing one of the cases of greatest production difficulty for veneered panels. The method for producing a door or similar by means of a frame according to the foregoing description substantially comprises the following phases: a) preparation of cross-members of suitable form in plan and with lateral edges ready for gluing; b) presetting in horizontal plane of a first flat-surface panel; c) supporting, at preset intervals, of such cross-members with their lower edge on the flat surface of such first panel; d) supporting of a second flat-surface panel on the upper surface of such cross-member; e) bending of both panels to a preferred shape, for example with a flat, convex or concave surface; f) gluing of the panels to such cross-members with possible curvature of the surfaces; g) application of the longitudinal sections to the flanks of the door thus obtained; h) finishing of the external surface of the panels. Similarly such cross-members may be flat and of any desired size. Obviously many variants may be introduced into the constructional details of the various members without thereby departing from the scope of this invention; in particular there may be varied according to any convenient form both the internal structure of the individual cross-members and the types of attachment by joining of the lateral sections to the edges of the cross-members.

Claims: A frame for doors, sliding doors and similar of the veneered type, comprising a multiplicity of cross-members (2), suitably formed and constituting, by means of their outer surface, supports for finishing panels (9), the free ends (2a,2b) of which have joining devices (4,4a,5) engaging with joining devices (6,6a) of sections (7) extending lengthwise over the full height of the door or similar and provided with shaped seats (7b) which overlap the free edges (9a) of such panels (9) in order to cooperate in the retention thereof and impart protection thereto. characterized in that such joining devices of cross-members (2) are formed by grooves (5) delimited by a rigid member (3) and by a tongue (4) flexibly deformable transversely and provided with a tooth (4a) provided on the inner surface of the groove (5) and in that matching joining devices of said longitudinal sections (7) are formed by two tabs (6) provided in turn with meshing teeth (6a) engaging with teeth (4a) of tongues (4) of cross-members (2), thus locking section (7) in position. A frame for doors, sliding doors and similar of the veneered type according to claim 1, characterized in that such cross-members (2) have an internal lattice structure (2c) stiffened transversally by a flat member (2d). A frame for doors, sliding doors and similar of the veneered type according to claim 1, characterized in that such cross-members (2) have a plan of substantially elliptical form relative to the longitudinal axis in order to make possible the production of doors with convex surfaces. A frame for doors, sliding doors and similar of the veneered type according to claim 1, characterized in that such cross-members have a plan of substantially rectangular symmetrical form relative to the longitudinal axis for the production of doors and similar with flat surfaces. A frame for doors, sliding doors and similar of the veneered type according to claim 1, characterized in that such longitudinal sections are of symmetrical form relative to a transverse axis and are provided with seats (7a) for the reversible fitting if hinges arranged in such a way as to allow the operation of the door with right-hand or left-hand hingeing and inward or outward opening. A method of assembling a door according to claim 1 characterized in that it comprises the following phases: a) preparation of cross-members of suitable form in plan and with lateral edges ready for gluing; b) presetting in horizontal plane of a first flat-surface panel; c) supporting, at preset intervals, of such cross-members with their lower edge on the flat surface of such first panel; d) supporting of a second flat-surface panel on the upper surface of such cross-member; e) bending of both panels to a preferred shape, for example with a flat, convex or concave surface; f) gluing of the panels to such cross-members with possible curvature of the surfaces; g) application of the longitudinal sections to the flanks of the door thus obtained; h) finishing of the external surface of the panels. Method according to claim 6 characterized in that the finishing phases of the outer surfaces of the panel may be carried out before the phase of joining with the cross-members.

Inventors: FAUCIGLIETTI RENZO, FAUCIGLIETTI, RENZO
Applicants: FAUCIGLIETTI ENG, FAUCIGLIETTI ENGINEERING S.R.L.
Application year: 1992
Main classification: E06B3
IPC codes: E06B3