FR2762352A1 - Welded sheet metal door - Google Patents

Abstract

The metal door (1) in folded and welded sheet steel comprises a first part forming a compartment (2) made from a first sheet. The longitudinal edges of this sheet are each folded twice to form the compartment external wall (6). Two edges perpendicular to the bottom and two folds parallel to the bottom extend towards each other. A second part (11) formed from a second flat sheet (12) is fixed into the folds to form the second main wall of the door. The door has split hinges welded along the longitudinal edges of the compartment bottom so that the door external wall opens outwards and the door internal wall (17) opens inwards. The door, after assembly, is chemically treated, after which a motorised electrical lock is built in.

Description

METAL DOOR IN FOLDED AND WELDED SHEET
The present invention relates to a folded and welded sheet metal door.

 There is a known metal door made of folded and welded sheet metal, comprising a first element forming a tray made from a first sheet metal, the two longitudinal edges of which have each been folded twice in the same direction so as to form a tray comprising a bottom, two edges perpendicular to the bottom and two folds parallel to the bottom and extending towards each other. Such a door also comprises a second element formed by a second flat sheet and adapted to be fixed on said folds along these to form the second main wall of the door. This door is adapted to receive hinges welded along one of the longitudinal edges of the container so that the bottom of the container is adapted to form the external wall of the door adapted to be open towards the outside, or the internal wall of the door adapted to be opened inwards. This door is suitable for receiving a lock of any type, in particular a motorized electric lock.

 For economic reasons, such a door is generally open at its upper part and at its lower part. The lock is mounted in the surface-mounted position because there is no lock on the market suitable for being mounted in the recessed position in such a door. The applied position of a motorized electric lock and the corresponding strike does not satisfy the users of such a door.

 In addition, such a door, if it is not made of stainless steel, is very sensitive to corrosion.

 The object of the present invention is to remedy the drawbacks of doors of the aforementioned type, and to propose a door of this type which has guaranteed resistance against corrosion, which comprises an invisible motorized electric lock, which can be waterproof, and which either however light, to be able to be installed by a single fitter, and economical.

According to the present invention, the door of the aforementioned type is characterized in that it comprises the following characteristics
a) the door is adapted to be subjected, after folding, assembly and welding, to a chemical treatment by soaking
b) the door is adapted to receive in the recessed position, after said soaking, said motorized electric lock
c) the first sheet forming the tank and the second sheet have the following openings, formed before folding and assembly
- on the sheet suitable for forming the outer wall of the door, a hole for the passage of the cylinder of the lock;
- on the sheet metal adapted to form the interior wall of the door, an opening extending in the longitudinal direction of the door over a height at least equal to the height of the lock and allowing the introduction of the lock inside Door
- on the edge opposite the hinges, a first hole for the passage of the motorized deadbolt of the lock, and a second hole for the passage of the magnetic field between the amount of the doorframe and the lock
d) support means fixed on the internal face of the external wall and on the internal face of the internal wall of the door, along the longitudinal edge, on the side of the hinges, of the opening for introducing the lock
e) guide means, fixed on the internal face of the external wall of the door and adapted to guide the lock in a sliding movement in the transverse direction of the door towards the corresponding edge
f) fixing means for fixing the lock inside the door in its recessed position
g) the positions and dimensions of the openings being predetermined according to the dimensions of the folded edges constituting the edges and the folds of the element forming the container and according to the direction of opening of the door to allow, after assembly of the door , the introduction into the interior cavity of the door of said motorized lock by said introduction opening.

 The treatment of the door by soaking is necessary if one wants a guaranteed resistance against corrosion, and it is necessary, as in the automobile industry, to subject the door in ordinary sheet metal to a cataphoresis treatment. Such a soaking treatment is also necessary in the case of a stainless steel production, to make the colored traces left by the various welds disappear by acid attack.

 The characteristics a) to g) above make it possible to introduce inside the door an electric motorized lock in the embedded position and to fix this lock in a way allowing reliable operation thereof. All drilling, bending, assembly, welding operations are carried out before the dip treatment. After this soaking, only the operations of placing the lock inside the door remain.

 According to another version of the invention, the door jamb adapted to receive a door according to the first version of the invention is characterized in that the upright opposite the hinges comprises, on its face opposite the corresponding edge of the door in closed position, an opening forming a strike adapted to receive the motorized deadbolt, and an opening adapted to removably receive the permanent magnet which cooperates with the lock.

 Other features and advantages of the invention will appear in the detailed description below.

In the accompanying drawings, given only by way of nonlimiting examples
- Figure 1 is a schematic view in longitudinal section, along II in Figure 2, of an embodiment of a door according to the first version of the invention, in place in a frame according to an embodiment of the second version of the invention, the door being adapted to be open to the outside
- Figure 2 is a schematic sectional view along II-II in Figure 1
- Figure 3 is a view similar to Figure 2, the door being adapted to be opened inward
- Figure 4 is a plan view of the first sheet adapted to form the first element of a door adapted to be opened inward, according to the embodiment of Figure 3
- Figure 5 is a front view of the second sheet adapted to cooperate with the sheet of Figure 4 to form a door according to Figure 3
- Figure 6 is a view similar to Figure 4 of the first sheet corresponding to a door adapted to be open to the outside according to the embodiment of Figure 2
- Figure 7 is a view similar to Figure 5 corresponding to a door according to Figure 2
- Figures 8 and 9 are schematic views illustrating the establishment of the lock by sliding towards the corresponding edge
- Figure 10 is a view of a detail of Figure 3
FIG. 11 is an elevation view of a detail of the door of FIG. 3.

 In the embodiment shown diagrammatically in FIGS. 1 and 2, the metal door 1 made of folded and welded sheet metal comprises a first element forming a tank 2 produced from a first sheet 3 whose two longitudinal edges 4, 5 have each been folded two times in the same direction so as to form a tray 2 having a bottom 6, two edges 7, 8 perpendicular to the bottom 6 and two folds 9, 10 parallel to the bottom 6 and extending towards each other.

 The door 1 also includes a second element 11 formed by a second flat sheet 12 and adapted to be fixed on said folds 9, 10 along these to form the second main wall of door 1.

 The door 1 is adapted to receive hinges 13 welded along one of the longitudinal edges 14, 15 of the bottom 6 of the tray 2. Thus, the bottom 6 of the tray 2 is adapted to form the outer wall 16 of the door 1 adapted to be open to the outside, as shown in Figure 2 by arrow 19.

 In the embodiment of FIG. 3, the door 21 is adapted to be open towards the inside, as shown diagrammatically by the arrow 70. Thus, the bottom 6 of the tank 2 is adapted to form the interior wall 17 of the door 21 .

 The door 1, 21 is adapted to receive a lock 18 of any type, in particular a motorized electric lock.

 Conventionally, and as shown diagrammatically in FIGS. 1 to 3, the door 1, 21 is mounted by means of the hinges 13 on a frame 22 comprising two longitudinal uprights 23, 24 and a transverse upright 25.

 In the example shown, the uprights 23, 24 and 25 are constituted by a tubular commercial profile, which has over its entire length a wing 26 projecting towards the inside of the door and adapted to receive a seal 27 to make the sealing.

 The uprights carry anchor bars 28 of a conventional type for anchoring these uprights in the masonry. A profile forming a water jet 29 is advantageously fixed above the outer wall 16 of the door. A threshold bar 30 is fixed to the ground.

According to the present invention, the door 1, 21 has the following characteristics
a) the door 1, 21 is adapted to be subjected, after folding, assembly and welding, to a chemical treatment by soaking
b) the door 1, 21 is adapted to receive in the embedded position, after said soaking, said motorized electric lock 18
c) the first sheet 3 forming the tank 2 and the second sheet 12 have the following openings, formed before folding and assembly
- On the sheet adapted to form the outer wall 16 of the door 1, 21, a hole 31 for the passage of the cylinder 32 of the lock 18
- On the sheet adapted to form the inner wall 17 of the door 1, 21, an opening 33 extending in the longitudinal direction 34 of the door 1, 21 over a height at least equal to the height of the lock 18 and allowing the introduction of the lock 18 inside the door 1, 21
- On the edge 7 opposite the hinges 13, a first hole 35 for the passage of the motorized deadbolt 36 of the lock 18, and a second hole 37 for the passage of the magnetic edge between the upright 23 of the frame 22 and the lock 18
d) support means 38 fixed on the internal face 39 of the external wall 16 and on the internal face 40 of the internal wall 17 of the door 1, 21, along the longitudinal edge 41, on the side of the hinges 13, of the opening 33 for the introduction of the lock 18
e) guide means 42 fixed on the internal face 39 of the external wall 16 of the door 1, 21, and adapted to guide the lock 18 in a sliding movement in the transverse direction, shown diagrammatically by the arrow 43, of the door 1, 21 to the corresponding song 7
f) fixing means 42 for fixing inside the door 1, 21 the lock 18 in its recessed position
g) the positions and dimensions of the openings being predetermined as a function of the dimensions of the folded edges constituting the edges 7, 8 and the folds 9, 10 of the element forming tray 2 and as a function of the direction of opening of the door 1, 21 to allow, after the assembly of the door 1, 21, the introduction, into the interior cavity 44 of the door 1, 21, of said motorized lock 18 by said introduction opening 33.

 In the example shown, the thickness available inside the element forming a container 2 between the bottom 6 of the container 2 and the corresponding fold 9 is substantially equal to the thickness of the lock 18.

Otherwise, shims must be provided to immobilize the lock 18 in the cavity 44.

 The first sheet 3 is advantageously dimensioned such that its transverse edges 45, 46 are adapted to be each folded twice in the same direction so as to each form a transverse edge 45, 46 of height identical to the edge 7, 8 of the edges 4, 5 and a corresponding fold 47, 48.

 This improves the tightness of the door.

 The fixing means 42 of the lock comprise at least two, and preferably four screws 42 fixed on the internal face 39 of the external wall 16 of the door 1, 21.

 The support means 38 have been shown in the form of a profile extending in the longitudinal direction 34 (vertical) of the door 1, 21. The profile 38 could as well extend in the transverse direction 43 (horizontal ) of the door 1, 21. The profile 38 could for example be a conventional stiffener, commonly called omega, stopping in the vicinity of the edge 41 of the opening 33.

Several stiffeners.

 The screws 42 are for example conventional screws welded to the external face of the external wall 17, the welded heads then being sanded with a grinding wheel to hide the screws and make them invisible from the outside.

 An electric cable, shown diagrammatically at 68, connects the lock 18 to a control box (not shown). The cable 68 passes inside the door 1, 21 and exits from the latter in a conventional manner through a hole 69 formed on the internal wall 17.

The motorized electric lock 18 is a commercial lock, for example a lock of the type
PICARD TELCOM.

 The digital code 50 is advantageously protected by a profile forming a water discharge 71 (see FIG. 1).

 It can be seen in FIG. 2 that an anti-clamp angle iron 72 is advantageously provided on the corner 14 of the tank 2 to protect this corner 14 from any attack.

 There is shown in Figure 4 a version 3a of the first sheet 3 corresponding to the case, shown in Figure 3, where the door 21 is open inward, and in Figure 5 the version 12a of the corresponding second sheet 12 then forming the outer wall 16 of the door 21.

 There is shown in Figure 6 a version 3b of the first sheet 3 corresponding to the case shown in Figure 2, where the door 1 is open to the outside, and in Figure 7 the corresponding version 12b of the second sheet 12 forming then the inner wall 17 of the door 1.

 As shown schematically in Figures 8 and 9, the lock 18 has slots 49 extending in the direction of its width, which corresponds to the transverse direction 43 of the door, and the screws 42 slide inside the slots 49 and serve means for guiding the lock 18.

 The opening 33 for introducing the lock 18 has a height greater than the height of the lock 18 by a distance allowing the introduction through said opening 33 and the positioning on the internal face 39 of the external wall 16 of the door 1, 21, of a digital code 50 whose keys 51 are adapted to pass through corresponding holes 52 formed in said outer wall 16.

 In the example shown schematically in Figure 10, the door 21 is adapted to open inward. A plate 53 of thickness corresponding to that of the fold 9 is fixed on the internal face 40 of the second sheet 12 which constitutes the internal wall 17 of the door 21.

 In the example shown schematically in Figure 11, the door 21 is adapted to open inward. The lock 18 comprises, in a conventional manner, a projecting plate 54 carrying the push button 55 provided for controlling the opening of the door from the inside.

 To avoid the use of additional shims aimed at completely immobilizing the lock 18 inside the cavity 44, between the fold 9 and the bottom 6 of the tank 2, it is advantageous to provide a notch 56 adapted to receive the plate 54 when the lock 18 is put in place. The plate 54 is thus housed in the thickness of the fold 9.

 FIGS. 1 to 3 show schematically the jamb 22 adapted to receive a door 1, 21.

 The upright 23, opposite the hinges 13, of the jamb 22 comprises, on its face 57 opposite the corresponding edge 7 of the door 1, 21 in the closed position, an opening forming a keeper 58 adapted to receive the motorized deadbolt 36, and a opening 59 adapted to removably receive the permanent magnet, shown diagrammatically at 60, which cooperates with lock 18.

 The upright 23 being a profile made of a metal having magnetic properties, for example ordinary steel, an element 61 made of a non-magnetic material is inserted inside the profile 23. This element 61 is shaped so as to serve as a housing for permanent magnet 60.

 A screw 62 of non-magnetic metal is, for example, introduced from the outside of the upright 23 to fix on said upright 23 a non-magnetic plate 63 covering the magnet 60, said permanent magnet 60 and, where appropriate, the element forming housing 61.

 Of course, the present invention is not limited to the embodiments which have just been described, and many changes and modifications can be made to them without departing from the scope of the invention.

Claims (10)

 1 - Metal door (1, 21) made of folded and welded sheet metal, comprising a first element forming a container (2) made from a first sheet metal (3), the two longitudinal edges (4, 5) of which were each folded two times in the same direction so as to form a container (2) comprising a bottom (6), two edges (7, 8) perpendicular to the bottom (6) and two folds (9, 10) parallel to the bottom (6) and s 'extending towards each other, and a second element (11) formed by a second flat sheet (12) and adapted to be fixed on said folds (9, 10) along these to form the second wall main door (1, 21), this door (1, 21) being adapted to receive hinges (13) welded along one of the longitudinal edges (14, 15) of the bottom (6) of the tank (2) so that the bottom (6) of the tank (2) is adapted to form the outer wall (16) of the door (1) adapted to be open to the outside, or the inner wall (17) of the door (21 ) adapted to be open towards inside, this door (1, 21) being adapted to receive a lock (18), of any type, in particular a motorized electric lock  (18), characterized in that it has the following characteristics  a) the door (1, 21) is adapted to be subjected, after folding, assembly and welding, to a chemical treatment by soaking  b) the door (1, 21) is adapted to receive in the embedded position, after said soaking, said motorized electric lock (18)  c) the first sheet (3) forming the tray 2 and the second sheet (12) having the following openings, formed before folding and assembly  - On the sheet adapted to form the outer wall (16) of the door (1, 21), a hole (31) for the passage of the cylinder (32) of the lock (18);  - On the sheet adapted to form the interior wall (17) of the door (1, 21), an opening (33) extending in the longitudinal direction (34) of the door  (1, 21) over a height at least equal to the height of the lock (18) and allowing the introduction of the lock (18) inside the door (1, 21)  - on the edge (7) opposite the hinges (13), a first hole (35) for the passage of the deadbolt (36) motorized by the lock (18), and a second hole (37) for the passage of the magnetic field between the upright (23) of the jamb (22) and the lock (18);  d) support means fixed on the internal face of the external wall and on the internal face of the internal wall of the door, along the longitudinal edge (41), on the side of the hinges (13), of the opening (33) introduction of the lock (18)  e) guide means (42), fixed on the internal face (39) of the external wall (16) of the door (1, 21) and adapted to guide the lock (18) in a sliding movement in the direction transverse (43) from the door (1, 21) to the corresponding edge (7)  f) fixing means (42) for fixing inside the door (1, 21) the lock (18) in its recessed position  g) the positions and dimensions of the openings being predetermined as a function of the dimensions of the folded edges constituting the edges (7, 8) and the folds  (9, 10) of the container element (2) and depending on the direction of opening of the door (1, 21) to allow, after assembly of the door (1, 21), the introduction, in the interior cavity (44) of the door (1, 21) of said motorized lock (18) through said insertion opening (33).  2 - Door according to claim 1, characterized in that the thickness available inside the tank-forming element (2) between the bottom  (6) of the container (2) and the fold (9) is substantially equal to the thickness of the lock (18).  3 - Door according to claim 1 or 2, characterized in that the first sheet (3) is dimensioned so that its two transverse edges (45a, 46a) are adapted to be each folded twice in the same direction so as to each form a transverse edge (45, 46) of identical height to the edge (7, 8) of the longitudinal edges (4, 5), and a corresponding fold (47, 48).  4 - Door according to one of claims 1 to 3, characterized in that the fixing means (42) of the lock comprise at least two and preferably four screws (42) fixed on the internal face (39) of the wall outside (16) of the door (1, 21).  5 - Door according to claim 4, characterized in that the lock (18) has lights (49) extending in the direction of its width, and the screws (42) serve as guide means.  6 - Door according to one of claims 1 to 5, characterized in that the opening (33) for introducing the lock (18) has a height greater than the height of the lock (18) by a distance allowing introduction through said opening  (33) and the installation on the internal face (39) of the external wall (16) of the door (1, 21), of a digital code (50) whose keys (51) are adapted to pass in corresponding holes (52) formed in said outer wall (16).  7 - Door according to one of claims 1 to 6, said door (21) being adapted to open inward, characterized in that a plate (53) of thickness corresponding to that of the fold (9) is fixed on the internal face (40) of the second sheet (12) which constitutes the internal wall (17) of the door (21).  8 - Door jamb (22) adapted to receive a pore (1, 21) according to any one of claims 1 to 7, characterized in that the upright (23) opposite the hinges (13) has, on its face ( 57) opposite the corresponding edge of the door (1, 21) in the closed position, an opening forming a strike (58) adapted to receive the motorized deadbolt (36), and an opening (59) adapted to receive removably l permanent magnet (60) which cooperates with the lock (18).  9 - jamb according to claim 8, the amount (23) being a metal profile having magnetic properties, characterized in that an element (61) of a non-magnetic material is inserted inside said profile (23) , this element (61) being shaped so as to serve as a housing for the permanent magnet (60).  10 - jamb according to claim 8 or 9, characterized in that a screw (62) of non-magnetic metal is introduced from the outside of the upright  (23) for fixing on said upright (23) a non-magnetic plate (63) covering the magnet (60), said permanent magnet (60), and where appropriate the housing element (61).