A device applied to a snap-fit ​​reinforcement for steel furniture doors.

Description

1 / 6 A device applied to a snap-fit ​​reinforcement for steel furniture doors. INTRODUCTION

[001] This Utility Model patent application relates to a “DISPOSITION APPLIED IN A FITABLE REINFORCEMENT FOR STEEL FURNITURE DOORS” concerning the joining of door folds, using a fitting and pressing method at the corners, instead of welding or simple folds, which ensures greater structural resistance, preventing deformation and weakening of the door in case of impacts or continuous use. FIELD OF APPLICATION

[002] Innovation applies to the steel furniture door manufacturing segment, particularly those requiring high strength and robustness, such as in residential and industrial cabinets and other furniture that needs reinforced construction. CONVINCING

[003] It is known to experts in the field that the steel furniture sector, although traditional, needs constant innovation to meet the growing demands for safety, durability and aesthetics. Current technologies, based on simple bends or welding at the corners, have significant limitations that can be overcome by adopting new solutions.

[004] The search for greater strength and robustness in steel furniture is driven by the need to protect the stored contents from factors that could compromise the integrity of the furniture.

[005] In addition to safety, durability is also a crucial factor in choosing steel furniture. The use of innovative materials and manufacturing processes increases the product's lifespan, reducing the need for maintenance and replacements.

[006] Aesthetics also plays an important role in the decision to purchase steel furniture. The search for more refined finishes and modern designs drives innovation in the sector, offering products that integrate harmoniously into different environments. Petition 870250011721, dated 02 / 13 / 2025, page 5 / 19 2 / 6

[007] In this context, the need for new technologies manifests itself in the search for solutions that meet the above requirements efficiently and economically. Innovation in materials, manufacturing processes and product design is essential for the development of steel furniture that meets the needs of an increasingly demanding market. STATE OF THE ART

[008] The current state of the art includes some patent documents that deal with the manufacture of steel furniture, such as document PI 1002915-0 entitled “SYSTEM AND PROCESS FOR ASSEMBLING PARTS FOR STEEL CABINETS” which uses cutouts and bends in steel sheets, eliminating the need for welding and stamping / drawing tools.

[009] In the document above, a snap-fit ​​system with minimal clearances is used, which eliminates the need for finishing or welding. The technical limitation regarding the requested innovation is that the corner may open due to the lack of corner pressing.

[010] Document BR202020019315 U2 entitled “ARRANGEMENT APPLIED TO STEEL DOOR REINFORCEMENTS” - consists of a steel door with flaps bent at 90° around the entire perimeter, forming vertical and horizontal flaps. The difference lies in the ends of the vertical flaps, which have tongues bent at 90° overlapping the horizontal flaps and fixed by welding points. In addition, a reinforcing channel is inserted on the inside of the door, fixed by welding points to the sheet metal and the horizontal flaps.

[011] In the document above, the door reinforcements are stiffened by welding at the ends and in the central channel. The creation of the channel and the welding process increase the number of industrial steps and, therefore, the construction complexity. MODEL OBJECTIVES

[012] The proposed model presents an interlocking reinforcement arrangement for steel furniture doors, aiming to increase the resistance of the steel cabinet door walls during opening and closing operations. Petition 870250011721, dated 02 / 13 / 2025, page 6 / 19 3 / 6

[013] The proposed model presents a snap-fit ​​reinforcement arrangement for steel furniture doors, aiming to reduce assembly steps.

[014] The proposed model features a snap-fit ​​reinforcement arrangement for steel furniture doors, eliminating the welding step.

[015] The proposed model features a snap-fit ​​reinforcement arrangement for steel furniture doors, increasing durability as the reinforcement provides greater strength, extending the lifespan of the doors.

[016] The proposed model features an interlocking reinforcement arrangement for steel furniture doors, providing improved stability and helping to prevent deformation and damage to the doors, especially with frequent use.

[017] The proposed model features a snap-fit ​​reinforcement arrangement for steel furniture doors, providing ease of installation, as its snap-fit ​​design allows for simple installation without the need for complex tools.

[018] The proposed model presents an interlocking reinforcement arrangement for steel furniture doors, which contributes to reducing maintenance costs because the interlocking result keeps the door more resistant, there is less need for repairs and replacements, resulting in long-term savings.

[019] The proposed model features a snap-fit ​​reinforcement arrangement for steel furniture doors, maintains a versatile design, and can thus be adapted to different cabinet models while preserving the furniture's aesthetics.

[020] The proposed model presents an interlocking reinforcement arrangement for steel furniture doors, providing increased security, as the interlocking makes the door more robust and offers greater protection against break-ins and accidental damage.

[021] The proposed model presents an interlocking reinforcement arrangement for steel furniture doors, which contributes to sustainability, as increasing the lifespan of furniture contributes to the reduction of waste and the use of new materials.

[022] These advantages make the reinforcement system an effective solution for improving the functionality and strength of steel furniture. Petition 870250011721, dated 02 / 13 / 2025, page 7 / 19 4 / 6 GENERAL DESCRIPTION OF THE MODEL

[023] The arrangement applied to the interlocking reinforcement for steel furniture doors is initially applied to a planned constructive arrangement on a metal or steel sheet, in which cutouts are made at the four ends (to form a set of folds), projecting a tooth and a loop onto the flange orthogonal to the tooth flange. The loop is stamped using a punch. After bending the tooth and the tongue to form the door wall, the tooth is inserted into the loop of the tongue, ensuring the joining and fixing of the door ends. DESCRIPTION OF THE DRAWINGS

[024] The model will be described in detail below, and for better understanding, reference will be made to the attached drawings, in which the following figures are represented. • Figure 1: Perspective view of the flattened sheet of the arrangement applied in a snap-fit ​​reinforcement for steel furniture doors; • Figure 2: Detailed enlarged perspective view of the end of the flattened sheet, showing the cutout with its new arrangement applied as a snap-fit ​​reinforcement for steel furniture doors; • Figure 3: Perspective view of the arrangement applied to the interlocking reinforcement for steel furniture doors, showing the bending of the flaps, with detail 01 enlarged; • Figure 4: Perspective view of the arrangement applied to a snap-fit ​​reinforcement for steel furniture doors, assembled and with an enlarged detail 02 of the end showing the tooth fitted into the handle; • Figure 5: Exploded perspective view of the arrangement applied to the interlocking reinforcement for steel furniture doors, in relation to the other door components. DETAILED DESCRIPTION OF THE INVENTION

[025] The arrangement applied to the interlocking reinforcement for steel furniture doors is initially applied to a planned constructive arrangement on a metal or steel sheet (1), where small cuts (2) are made at the four extremities (E), which define a set of folds (D). Still on the metal or sheet Petition 870250011721, dated 02 / 13 / 2025, page 8 / 19 5 / 6 steel (1) has four imaginary lines of bends (LD) to form flanges (A) that define the thickness of the door (P).

[026] The cutouts (2) made have two main projections (3), being the projection of a tooth (4) and the projection of a loop (5). stamped by means of a punch.

[027] More specifically, the claimed innovation relates to an APPLIED ARRANGEMENT IN A FITABLE REINFORCEMENT FOR STEEL FURNITURE DOORS, consisting of a planned metal or steel sheet (1), which has small cutouts (2) made at the four ends (E), which define a set of folds (D). Also in the metal or steel sheet (1) there are four imaginary fold lines (LD) to form tabs (A) which define the thickness of the door (P).

[028] The two main projections (3) are inserted into tabs (A), with one projection being a tooth (4) in tab (A2) and the other projection being a handle (5) in tab (A1), with the handle (5) being responsible for allowing the definitive insertion of the tooth projection (4).

[029] The tooth (4), located on the perimeter line (LP), has a section (6). On the opposite side of the tooth (4), there is an inclined cavity (7) that extends to the perimeter line (LP) and has a chamfer (8), which is limited by the imaginary bend lines (LD).

[030] The tabs (A) are folded 90°, starting with the two tabs (A1), which have the handle (5) and orthogonally to tab (A1), the two tabs (A2), which have the teeth (4), are folded.

[031] In the step where the tab (A2) is folded, the tooth (4) is allowed to be inserted into the handle (5). This is possible due to the fact that the handle (5) enters the inclined cavity (7), and the chamfer (8) generates a contact relief with the handle (5) when the tab (A2) is folded, facilitating the fitting of the tooth (4) into the handle (5), so that the handle (5) is housed in the sectioning (6) of the tooth (4) definitively locking the two tabs (A1) and (A2).

[032] The metal or steel plate (1), mounted and locked by means of the constructive arrangement composed of the main projections (3), namely, tooth (4) and handle (5), defines a face (F) of the door (P). For the shaping of the door (P), another Petition 870250011721, dated 02 / 13 / 2025, page 9 / 19 6 / 6 face (F) of smaller dimension, using a known method involving both faces (F) for mounting the door (P). Petition 870250011721, dated 02 / 13 / 2025, p. 10 / 19

Claims

1 / 1 CLAIM 1) ARRANGEMENT APPLIED IN A FITABLE REINFORCEMENT FOR FURNITURE DOORS IN STEEL, metal or steel sheet (1), which has small cutouts (2) made at the four ends (E), which define a set of folds (D); the metal or steel sheet (1) has four imaginary lines of folds (LD) to form flaps (A) that are folded at 90°, which define the thickness of the door (P), the set of folds (D), is characterized by two main projections (3); inserted in the tabs (A), with the projection of a tooth (4) in the tab (A2) and the other projection of a loop (5) in the tab (A1), the loop (5) allowing the definitive introduction of the tooth projection (4), which in turn is located on its perimeter line (LP), has a section (6) and on the opposite side to the tooth (4), there is an inclined cavity (7) that extends to the perimeter line (LP) and has a chamfer (8), which is limited by the imaginary bend lines (LD);The flaps (A) are folded 90°, starting with the two flaps (A1), which have the handles (5) at the ends (E) and orthogonally to this flap (A1), the other flap is folded, being flap (A2) which are equipped with teeth (4) at the ends (E).; Petition 870250011721, dated 02 / 13 / 2025, page 11 / 19

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