Method for producing at least one component part for furniture fitting

Abstract

The invention relates to a method for producing at least one component part (1), in particular a rail, for furniture fittings, in particular preferably for drawer pull-out guides (4), in which the following method steps are carried out in chronological order: providing a flat sheet metal (5) as a semi-finished product (10) of the at least one component part (1), preferably a rail, the plate (5) has a longitudinal extension (6), two top surfaces (7) and two side surfaces (9) which are separated by the width (8) of the plate (5). At least one indentation (13) is provided on at least one top surface (7) of the sheet material (5), preferably by means of at least one embossing punch and / or at least one embossing roller (12), the at least one indentation (13) being arranged substantially parallel to the longitudinal extension (6); mechanically separating, preferably breaking, particularly preferably bending and separating the sheet material (5) in the region of the at least one indentation (13); the separated sheet metal (5) is bent in such a way that a contour (15) of the at least one component part (1), preferably a track, is formed in a cross-section (14) orthogonal to the longitudinal extension (6).

Description

Field of the Invention

[0001] The present invention relates to a method for manufacturing at least one component part, in particular a rail, for furniture fittings, particularly preferably for drawer pull-out guide devices. Furthermore, the present invention relates to a drawer pull-out guide device for movably supporting a drawer on a furniture body as described in the preamble of claim 13. Background Art

[0002] A common problem in the manufacture of component parts such as rails, particularly for the furniture industry or furniture trade, is the need for metal, which is necessary for the manufacture of one of the rails or the like. The high material consumption results in high weight and increased costs in mass production. Therefore, it is desirable to use as little metal as possible, because the resource-saving use of raw materials not only brings ecological advantages but also economic advantages.

[0003] One measure for saving metal is to use thin-walled metal sheets, whereby the weight of the rails can also be advantageously reduced. In the prior art, rails particularly for the furniture industry are usually cut to length by separation cutting (e.g., by a saw blade with a defined width), thereby producing rails with defined dimensions. However, a high proportion of metal is produced as waste, and there has been a long-standing need in the furniture industry to save materials by suppressing this metal waste.

[0004] A method for manufacturing tubes and extruded profiles has been disclosed in document DE 10 2007 018 927 A1, in which chamfers in the tubes or extruded profiles are utilized to minimize the risk of injury and the degree of deformation after the length-cutting process step without producing separation waste.

[0005] The disadvantage of the prior art is that only the semi-finished products themselves are used for the further transportation of the semi-finished products. However, then the tubes and extruded profiles have to be adapted for the corresponding fields of application, and the structural design of the semi-finished products is determined by the original forming process. And there is no method provided for specific task areas with defined tasks, individual purposes, structural design, and specific challenges.

[0006] In order to be able to further reduce material waste, attempts have been made to position the cutting edges very close to each other or to arrange them overlapping relative to each other for the stamping process, so that, for example, the best geometric shape of a strip-shaped semi-finished product can be used for the rails. However, this simultaneously results in sharp edges on the longitudinal surfaces in the subsequently bent profiles of the rails, whereby there is an increased risk of injury during use, and complex reworking steps or separate protective devices are required to reduce the risk of injury. Summary of the Invention

[0007] Accordingly, the technical object of the present invention is to provide a method for manufacturing at least one component part for a furniture fitting and an improved drawer pull-out guiding device, which are improved compared with the prior art. In the method and the drawer pull-out guiding device, at least some of the disadvantages of the prior art are eliminated, and the method and the drawer pull-out guiding device are particularly characterized in that during the manufacturing of the component part for the furniture fitting, metal waste is reduced, and the risk of injury during the use of the manufactured component part is reduced.

[0008] This object is solved by the features of claim 1.

[0009] Accordingly, it is provided according to the present invention that the following method steps are carried out in chronological order:

[0010] - Providing a flat sheet as a semi-finished product of at least one component part, preferably a rail, the sheet having a longitudinal extension, two top surfaces, and two side surfaces spaced apart by the width of the sheet.

[0011] - Providing at least one indentation on at least one top surface of the sheet, preferably by means of at least one embossing punch and / or at least one embossing roller, wherein the at least one indentation is arranged substantially parallel to the longitudinal extension.

[0012] - Mechanically separating the sheet in the region of the at least one indentation, preferably breaking (abbrechen), particularly preferably bending and separating.

[0013] - Bending the separated sheet so as to form the profile of the at least one component part, preferably a rail, in a cross-section orthogonal to the longitudinal extension.

[0014] Thereby, material waste can be effectively suppressed. The material waste is generated in the furniture industry in traditional component parts, such as rails or similar parts, by means of the cutting and separating method of rails from profile materials. Therefore, it is promoted to reduce the emission cost and / or recycling cost of metal waste in mass production, to make the component parts cleaner, and the processing environment cleaner, with lower reprocessing cost and significant cost savings in production, because the processing steps and the punching waste or separating waste (for example, caused by the cutting width of the separating tool) accumulate with each manufactured component part.

[0015] In addition, at the same time, a longitudinal surface of the profile can be automatically generated, which has a taper and is configured to be burr-free (due to plastic deformation), so that the risk of injury during the use of the component part in the furniture can be significantly reduced. Generally, only one of the longitudinal surfaces can be processed before bending, so as to effectively utilize the width of the raw material, for example, or to provide a taper for both longitudinal surfaces by means of indentations, which remains at the component part during the processes of breaking, separating, pulling off, etc. Generally, the taper can also be removed in subsequent method steps.

[0016] The sheet material preferably exists as a steel sheet. However, in the context of the present invention, the concept of sheet material should be interpreted broadly, and other non-metallic sheet-like materials, such as plastic sheets, composite material sheets, synthetic material sheets or the like, can also be understood as sheet materials in non-metallic form. Particularly preferably, the sheet material is configured to be metallic.

[0017] In the field of the furniture industry and especially in the case of component parts, such as rails, in automated manufacturing, mechanical separation without the aid of cutting tools (such as saw blades) or stamping tools, such as breaking, bending or separating, is in principle an uncommon measure, especially because hitherto, due to the large material thickness and the large cross-sectional diameter of the profile, and at the same time the high requirements for the fidelity and precision of the profile geometry, people have painstakingly worked to introduce cutting separation methods to damage the complex geometry of the rail or the like as little as possible. According to the present invention, this can also be ensured, wherein the geometry of the profile of the at least one component part is accurately maintained in cross-section and extending across the longitudinal direction.

[0018] Particularly light component parts with a small wall thickness can be made particularly advantageously with low force consumption and low plastic deformation by the method, wherein an aesthetically satisfactory appearance of the component part is also largely given.

[0019] If the sheet material (for example, existing as flat steel) is profiled by indentations before the bending process, complex geometries can also be achieved during the bending process for forming at least one component part, wherein the at least one indentation follows the complex geometry of the profile of the at least one component part so as to be able to mass-produce the component part particularly effectively. Especially because it is introduced before the bending process, the profile of the at least one component part is not undesirably affected by the at least one indentation.

[0020] The technical term "mechanical separation" should be understood as all separation methods that do not produce material waste (which is caused, for example, by cutting separation methods).

[0021] The component part can be, for example, a rail, such as a body rail or a loading rail, especially for a drawer pull-out guiding device as a furniture fitting, or a band arm, an adjusting arm, a hinge part, a housing part or the like for a flap fitting or other furniture fittings (such as hinges).

[0022] Furthermore, advantageous features are that, due to the absence of burrs caused by the cutting separation method, in the installation of the component parts, the at least one component part poses a lower risk of injury to the user and / or assembler of the furniture and no reprocessing is required. In addition, for example, the separating tool has a limited service life due to wear phenomena, and the repair and / or maintenance work during the mass production of component parts can be significantly reduced. The lateral dimension (and usually also the longitudinal dimension) in the width of the at least one component part can be flexibly adapted by the positioning of the at least one indentation, where the sheet material does not have to pre-exist in a suitable width dimension (or length dimension).

[0023] The at least one component part can be, for example, a furniture rail, a body rail, an intermediate rail (preferably at least partially positioned between the body rail and the loading rail), a loading rail, a container rail (preferably for arranging a drawer on the container rail), etc. Through cold working hardening in a non-separating cutting, chip-free and preferably burr-free mechanical breaking process, the at least one indentation can be used as a rated fracture site, where particularly advantageous material characteristics of the component part are achieved in the area around the at least one indentation.

[0024] The breaking process of the component part can be achieved by a non-separating cutting separating tool (such as a tappet or the like) or manually. Particularly preferably, a semi-automatic or automatic hydraulic or pneumatic drive is used to remove the at least one component part from the remaining material by pushing and / or pulling (for example, by pulling apart from each other), where no stamping tools, saws or grinding wheels (which would cause burrs and reprocessing steps) are required. The at least one indentation can be used as a defined breaking edge under bending load for forming the at least one component part, where the tensile / compressive load is focused on the at least one indentation.

[0025] The at least one indentation can be introduced, for example, into a strip-shaped sheet material by an embossing punch (such as an indentation punch) or an embossing roller (such as an indentation roller), where generally after mechanical separation (breaking), at least one tapered portion in the form of a chamfer is arranged on the end face of the contour of the component part. Preferably, the at least one indentation includes two side edges, where after the breaking process, one side edge is assigned to the at least one component part.

[0026] As mentioned at the beginning, a drawer pull-out guiding device for movably supporting a drawer on a furniture body is also claimed, which drawer pull-out guiding device includes

[0027] - at least one body rail to be fixed on the furniture body and

[0028] - at least one loading rail to be connected to the drawer, which loading rail is movably supported relative to the at least one body guide rail in the longitudinal direction, and

[0029] - At least one intermediate rail, if necessary, which is at least partially arranged between the at least one main rail and the at least one loading rail, and

[0030] - At least one container rail, if necessary, for arrangement on the at least one loading rail and / or on a drawer,

[0031] wherein the at least one main rail and / or the at least one loading rail has a profile formed by at least one flat sheet in a cross-section orthogonal to the longitudinal direction, characterized in that the at least one main rail and / or the at least one loading rail and / or at least one intermediate rail, if present, and / or at least one container rail, if present, are manufactured as component parts by a method such that at least one, in particular two, longitudinal faces of the profile of the at least one main rail and / or the at least one loading rail and / or the at least one intermediate rail, if present, and / or the at least one container rail, if present, are constructed with tapers.

[0032] However, in addition to drawer pull-out guiding devices, the application of this method can also be applied to other furniture fittings.

[0033] By this method, tapers can be produced on at least one longitudinal face of the profile. The intermediate rail is not mandatory, but can ensure the complete pull-out of the drawer relative to the furniture body and serve as an intermediate element between the main rail and the loading rail. The container rail is not mandatory, but can be used, for example, in the preferably metallic frame of the drawer as a connecting element between the side wall of the drawer or container and the loading rail, wherein the container rail is preferably connected to the drawer pull-out guiding device in a material-locking manner, or by hooking onto the frame capping, and by vertically supporting on the loading rail.

[0034] The longitudinal direction generally corresponds to the longitudinal extension of the sheet. Particularly preferably, the taper extends in the longitudinal face (and, if necessary, in one or more end faces) over the entire profile of at least one component part.

[0035] Advantageous embodiments of the invention are defined in the dependent claims.

[0036] According to an advantageous design of the invention, at least two opposing indentations are arranged on two top faces of the sheet, preferably stacked one above the other in a direction orthogonal to at least one of the two top faces.

[0037] By the indentations stacked one above the other, particularly symmetrical longitudinal faces (or end faces) of the component part can be produced, wherein the opposing and / or side-by-side arranged indentations can generally have different depths and / or indentation geometries.

[0038] Advantageously arranged, the bent sheet is mechanically separated, preferably broken, particularly preferably bent and separated, at at least two, preferably at least two, indentations stacked one above the other.

[0039] However, it is generally also conceivable to use only one indentation for the mechanical separation process.

[0040] It has proven advantageous for at least one component part to be formed with a substantially burr-free taper on at least one, preferably two, longitudinal faces of the profile, wherein preferably the taper has a taper cross-section that extends orthogonally to the longitudinal extension of the sheet, and the taper cross-section is substantially triangular, preferably isosceles triangular in shape, and particularly preferably the taper cross-section is convex and / or concave.

[0041] The taper is generally achieved by a combination of cold work hardening caused by introducing at least one indentation and plastic deformation during the mechanical separation method step, and generally extends over the entire longitudinal face (or end face) of the profile, where the longitudinal face is the side face of the base sheet in the unfolded state of the profile.

[0042] According to an advantageous embodiment of the invention, the sheet is severed without separation cutting, stamping and offcuts in the region of the at least one indentation, wherein at least one indentation is used as a rated fracture site during the bending or separation of the sheet, and preferably it is provided that the at least one component part is formed without further processing.

[0043] The manner and method of mechanical separation are generally arbitrary, wherein no chip waste is generated during mechanical separation, and if necessary, reprocessing by cutting can be provided - however this is not mandatory - so that the at least one component part can be used directly, for example, as a furniture rail without posing a high risk of injury.

[0044] It has proven advantageous for the sheet to have a wall thickness in the range of 0.5 mm and 1.8 mm, preferably between 0.6 mm and 0.8 mm.

[0045] A wall thickness below 1.8 mm (which is used in conventional component parts such as rails) provides a particularly light component part, which can be mechanically separated particularly advantageously by the method according to the invention and has low material consumption.

[0046] An advantageous variant of the invention is that preferably during the bending of the sheet, the sheet is folded into a hem in the region of at least one longitudinal face.

[0047] By means of the hem, the wall thickness can be locally doubled in order to increase the strength and / or stability characteristics in the desired region of the component part without doubling the weight of the component part itself.

[0048] Particularly preferably, the at least one indentation is introduced into the sheet in the form of a groove or profile having an opening angle between 40° and 140°, preferably between 75° and 105°, and particularly preferably substantially 90°.

[0049] For example, the same or different depths and / or geometries can be considered for the at least one indentation in order to serve as a defined rated fracture site for tearing and / or breaking.

[0050] In one embodiment of the invention, it is provided that the at least one indentation has an indentation cross-section extending orthogonally to the longitudinal extent of the sheet, and the indentation cross-section has the form of a triangle, trapezoid, elliptical segment and / or circular segment.

[0051] Particularly preferably, after the bending of the profile of the sheet, the at least one indentation is present in such a way that 0.05 mm to 0.2 mm, preferably 0.08 mm to 0.12 mm, is retained between the two top surfaces. Particularly preferably, the at least one indentation includes a trapezoidal shape, wherein the smallest side length of the trapezoid between the two top surfaces is between 0.1 mm and 0.4 mm, preferably between 0.15 mm and 0.25 mm.

[0052] According to a preferred embodiment of the invention, for each component part, exactly two or four indentations arranged in pairs on two top surfaces are introduced into the flat sheet parallel to the longitudinal extent, and the component part is formed by one or two, preferably successive, breakages via the two or four indentations of the sheet.

[0053] This not only facilitates the mechanical separation process, but also maximizes material savings.

[0054] It has proven to be advantageous to provide the sheet with a plurality of indentations arranged in pairs on two top surfaces and then mechanically break a plurality of component parts.

[0055] Thereby, a large number of component parts can be manufactured batchwise in a time-efficient manner and preferably without interruption from the same semi-finished product.

[0056] Particularly preferably, it is provided that at least one additional indentation is arranged in the sheet transversely to, preferably substantially parallel to, the longitudinal extent, and preferably it is provided that the particularly preferably bent sheet is mechanically separated, particularly preferably broken or bent and separated, in the region of the at least one additional indentation to form at least one substantially burr-free additional taper at at least one end face of the component part.

[0057] If, for example, two longitudinal faces and two end faces of the track are each produced by means of indentations or additional indentations (so that there are generally four tapers that are continuous and / or adjacent along the contour of the track), then it is possible to ensure a particularly high degree of reduction in material waste and the risk of injury.

[0058] Preferably, at least one of the at least one main track and / or at least one loading track and / or at least one intermediate track that may be present and / or at least one container track that may be present, in particular two end faces of the contour, are configured with additional tapers.

[0059] Furthermore, it is preferably provided that the taper and / or the additional taper include an angle in the range between 60° and 140°, preferably between 75° and 105°, particularly preferably substantially 90°, wherein it is preferably provided that at least one, preferably two longitudinal faces and / or end faces are configured substantially burr-free.

[0060] The geometry of the taper can be flexibly adjusted by means of the geometry of the at least one indentation.

[0061] In a further embodiment, it can be provided that the at least one main track and / or the at least one loading track has at least one fixed section with a fixed side that can at least partially abut against the furniture body or at least one furniture component when assembled on the furniture body or at least one furniture component, wherein the at least one fixed section has at least one preferably circular opening for a fixing means, preferably a screw, to pass through, and wherein the at least one opening is surrounded on a second side by a raised portion that projects transversely from the second side, and the second side is spaced apart from the fixed side by a material thickness of the fixed section that is preferably between 0.5 mm and 1.8 mm, particularly preferably between 0.6 mm and 0.8 mm.

[0062] By means of the raised portion, the periphery of the opening is strengthened, and the force starting from the underside of the screw head can be distributed over a larger area. By means of this raised portion, the sinking of the screw head into the thin-walled metal of the fixed section can be reduced. Thus, the risk of damaging the periphery of the opening can be reduced in this way and material can be saved.

[0063] According to an advantageous design of the invention, at least one main track and / or at least one loading track and / or at least one intermediate track that may be present and / or at least one container track that may be present are folded into a hem in the region of at least one contour face of the contour.

[0064] By means of the hem, the ratio of the load capacity of the track or other component parts to the weight of the track / component parts can be increased.

[0065] It is particularly preferably provided that the at least one tapered portion and / or the at least one further tapered portion have a tapered cross-section extending parallel to and / or orthogonally to the longitudinal extent of the sheet, which tapered cross-section is substantially in the form of a triangle, preferably an isosceles triangle, wherein it is preferably provided that the tapered cross-section is configured to be convex and / or concave.

[0066] According to a preferred embodiment, the profile has at least one indentation, preferably oriented orthogonally to the longitudinal extent of the sheet, for strengthening the profile, wherein it is preferably provided that the at least one indentation extends on at least two substantially orthogonal profile faces and / or at least two indentations are provided, which are arranged alternately in the direction of the inner region of the profile and in the direction of the outer region of the profile.

[0067] In the case of particularly efficient material requirements, the at least one stamping portion is conducive to the stability and / or strength of at least one component part. Description of the Drawings

[0068] Other details and advantages of the present invention will be described in detail below with reference to the drawings and with reference to the embodiments shown in the drawings. Shown therein are:

[0069] Figure 1a 、 Figure 1b A drawer pull-out guide device according to a particularly preferred embodiment is shown in perspective and the loading rail is shown separately, the drawer pull-out guide device comprising a body rail and a loading rail,

[0070] Figures 2a to 2f Shown for manufacturing a Figure 1a process step in a preferred method for the rails of a drawer pull-out guide device according to an

[0071] Figure 3 Shown for manufacturing a Figure 1b chronological stage in the process of a preferred method for the rails according to an

[0072] Figures 4a to 4c Schematically shown is the mechanical separation at the indentation of the sheet.

[0073] Figures 5a to 5f Shown is a preferred method comprising introducing an indentation, mechanical separation and producing a tapered portion on the longitudinal face of the component part to be formed of the furniture fitting.

[0074] Figure 6 Shown is a schematic view of a preferred method for manufacturing a rail, wherein additionally further indentations transverse to the longitudinal extent are used. Detailed Description of the Invention

[0075] Figure 1aShown is a drawer pull-out guide device 4 for movably supporting a drawer on a furniture body, including a main rail 2 to be fixed on the furniture body and a loading rail 3 to be connected to the drawer, the loading rail being movably supported relative to the main rail 2 in the longitudinal direction 30. The main rail 2 and the loading rail 3 have a profile 15 formed by a flat plate 5 in a cross-section 14 orthogonal to the longitudinal direction 30.

[0076] The main rail 2 and the loading rail 3 are manufactured as component parts 1 such that at least one (usually two) longitudinal faces 51 of the profile 15 of the main rail 2 or the loading rail 3 are configured with a taper 16, wherein, Figures 2a to 5f the process steps for forming the taper 16 are shown in detail.

[0077] The main rail 2 has a fixed section 32 with a fixed side 33 which can be abutted against the furniture body when assembled on the furniture body, wherein the fixed section 32 has a circular opening 35 for a fixing mechanism, such as a screw, to pass through. The opening 35 is surrounded by a bulge 39 on a second side 38 spaced apart by a material thickness between 0.5 mm and 1.8 mm through the fixed section 32, the bulge protruding laterally from the second side 38.

[0078] The profile 15 of the main rail 2 includes an indentation 41 oriented orthogonally to the longitudinal extension 6 of the plate 5 for strengthening the profile 5, wherein the loading rail 3 can generally also have an indentation 41 for increasing stability, the indentation extending, for example, across two orthogonally adjacent profile faces. The indentations 41 of the main rail are arranged alternately in the direction of the inner region 42 of the profile 15 and in the direction of the outer region 43.

[0079] Figure 1b Versus Figure 1a only differs in that the loading rail 3 is shown in a disassembled state. The loading rail has two longitudinal faces 51 and two end faces 17 of the profile 15. Additional tapers 52 can generally be arranged on the end faces 17. According to the invention, a taper 16 is arranged on at least one longitudinal face of the two longitudinal faces 51, which is caused by a dent 13 arranged parallel to the longitudinal extension 6 during the production process.

[0080] Figure 2a The introduction of the dent 13 is shown, the dent being arranged on the outside of the plate 5. In an enlarged detailed part, it can be seen that three dents 13 are arranged parallel to the longitudinal direction 30 via a stamping roller 12 (or generally a stamping punch in the sense of a dent stitch). The material for five tracks can be separated from the width 8 of the plate 5.

[0081] Figure 2bThe geometry of the dent shape is shown on an enlarged scale, where the dent 13 is present in the sheet 5 in the form of a groove 22 with a profiled contour 23 including a rounding, and the profiled contour 23 has an opening angle 24 in the range between 75° and 105°.

[0082] The dent 13 has a dent cross-section 25 orthogonal to the longitudinal extension 6 of the sheet 5, and the dent cross-section is in the shape of a triangle 19, where the shape is generally arbitrary and can also be designed as, for example, a trapezoid, an elliptical section, or a circular section.

[0083] Figure 2c A rolling device for processing semi-finished products or raw materials for manufacturing tracks is shown, where two embossing rollers 12 arranged parallel to each other and orthogonal to the longitudinal direction 30 and the longitudinal extension 6 are responsible for introducing the dents 13.

[0084] In an enlarged detail section, one of the two additional rollers can be seen, which is arranged orthogonal to the embossing roller 12 and is provided for rounding the outer edges. For the longitudinal surface 51 formed by the dent 13 and thus having a tapered portion 16, this rounding processing step can be omitted.

[0085] Figure 2d Shown according to Figure 2c a front view of the rolling device, where the sheet 5 continuously passes between the embossing rollers 12.

[0086] By means of Figure 2e (where the embossing rollers 12 on the sheet 5 are shown in a simplified manner), a method for manufacturing a component part 1 in the form of a track for mounting on a drawer pull-out guide device 4 for furniture fittings can be exemplified: A flat sheet 5 (mostly a steel sheet, and it can also be an aluminum sheet or a plastic sheet) is provided as a semi-finished product 10 or raw material for the track, and the sheet has a longitudinal extension 6, two top surfaces 7, and two side surfaces 9 spaced apart by the width 8 of the sheet 5.

[0087] Subsequently, two embossing rollers 12 are used to provide the sheet 5 with dents 13 on the two top surfaces 7, where the dents 13 are arranged parallel to the longitudinal extension 6 (or the longitudinal direction 30). Subsequently, in chronological order, the sheet 5 is mechanically separated (chip-free) in the area of the dents 13, where, for example, the sheet parts are broken by bending and separating, or torn apart relative to each other by pulling.

[0088] The separated sheet 5 is bent in a further sequence so as to form the contour 15 of the component part 1 (in this embodiment, the track) in a cross-section 14 orthogonal to the longitudinal extension 6. Before or after the bending process, a stamping or profiling can be provided for the sheet 5 / contour 15.

[0089] Figure 2f Perspective view of a sheet material with indentations before mechanical separation, front view, and view with an enlarged detail section in the area of the cross-section of the indentation 13.

[0090] Figure 3 Shows different stages in the preferred manufacturing process of a component part during press manufacturing, in which the sheet 5 is contoured and stamped, and the sheet is divided into segments by plastic (chip-free) deformation in order to bend a plurality of tracks. This division into segments takes place orthogonally to the longitudinal extension 6 and in the direction of the longitudinal extension 6, wherein generally a cutting method for separating segments in the longitudinal direction 30 of the sheet 5 can also be provided.

[0091] The sheet 5 is provided with a plurality of indentations 13 (and additional indentations 50) arranged in pairs on two top surfaces 7 in order to then be able to mechanically break off a plurality of component parts 1 that usually still have to be bent.

[0092] Figures 4a to 4c Illustrates the mechanical separation process (transverse to the longitudinal extension 6) by means of a disconnection tool in the form of a clamp, using individual tracks as an example.

[0093] In Figure 4a , the clamps move relative to each other such that the sheet 5 with the indentations 13 is clamped between the clamps, and this state is visible in Figure 4b .

[0094] In Figure 4c , the pair of clamps moves relative to an adjacent pair of clamps such that the sheet is mechanically separated via the indentations 13 as the rated fracture sites. Thereby, the tracks are separated from the half die (Halbwerkzeug) by disconnection, and generally a bending or folding process for mechanical parts can also be provided (see Figure 6 ).

[0095] In Figure 5a the perspective view and in Figure 5b the side view, together with the associated detail sections, the indentations 13 can be seen, which are introduced into the raw material by plastic deformation in order to enable separation transverse to the profile direction.

[0096] During plastic deformation of the indented sheet material according to Figure 5c , segmentation of the sheet 5 is achieved on the contour defined by the indentations 13, and this is schematically shown in Figure 5dIt is shown that after mechanical separation, there are four sheet parts which can be used to manufacture component part 1, wherein an outer section with a burr-free taper 16 will be present on the longitudinal face 51 of the contour 15 to be bent, and two inner sections can be used for the contour 15 with tapers 16 formed on the two longitudinal faces 51.

[0097] In Figure 5e , the mechanical separation of the sheet 5 has been achieved by means of indentations 13 transverse to the longitudinal extension 6. Figure 5f A view of one of the sections in the longitudinal direction 30 is shown, in which it can be seen that the tapers 16 each have a taper cross-section 18 in the form of a triangle 19 which is orthogonal to the longitudinal extension 6 of the sheet 5. The taper cross-section 18 is configured convexly in parts and concavely in parts, and the profile of the taper cross-section 18 can be influenced, for example, by the type of separation process (a pure convex shape can be achieved by means of a blunt tear).

[0098] In an example of the component part 1 which can be formed according to Figure 5f , exactly four indentations 13 which are pairwise arranged on two top faces 7 are introduced into the flat sheet 5 parallel to the longitudinal extension 6, wherein the component part 1 can be formed by means of two successive breaks (and then bending) via the four indentations 13 of the sheet 5.

[0099] On two top faces 7 of the sheet 5, there are arranged a plurality of pairs of opposing indentations 13 which are stacked one above the other in a direction orthogonal to one of the two top faces 7. The sheet 5 is mechanically separated at the two indentations 13 which are stacked one above the other. The separation process can be achieved by means of tensile stress and / or compressive stress.

[0100] The tapers 16 (and Figure 6 the further tapers 52 shown in Figure 6 ) each enclose an angle 31 in the range between 75° and 105° with one another. The two longitudinal faces 51 (or the end faces 17 according to

[0101] are configured substantially burr-free with regard to injury during use, wherein usually only one longitudinal face 51 (or end face 17) can be machined in this way.

[0102] The sheet 5 has a wall thickness 20 of 0.7 mm, wherein the wall thickness is preferably in the range between 0.5 mm and 1.8 mm.

[0103] Figure 6 A component part 1 in the form of a loading rail 3 is shown, in which, during bending of the sheet 5 into the profile 15, the sheet 5 is folded into flanges 21 in the region of two longitudinal faces 51.

[0104] In the case of this component part 1, in addition to the indentations 13 and the tapers 16, additional indentations 50 are arranged parallel to the longitudinal extension 6 into the sheet 5. The sheet 5 can be mechanically separated in the region of the additional indentations 50 in the bent state or in the unbent state in order to form additional tapers 52 which are substantially burr-free on the end faces 17 of the component part 1. Here, the separation process can also be carried out, for example, by parting or folding.

[0105] One of the two end faces 17 of the profile 15 is constructed with an additional taper 52, wherein additional tapers 52 can also generally be provided on both end faces 17.

[0106] The taper cross-section 18 of the additional taper 52 (similar to the taper 16) is present in the form of a convex triangle 19, wherein the geometry of the additional taper 52 is generally arbitrary and can be influenced by the additional indentations 50 and according to the mechanical separation method.

Claims

1. A method for manufacturing at least one component part (1), in particular a rail, for a furniture fitting, particularly preferably for a drawer pull-out guide device (4), characterized in that The following method steps are implemented in chronological order: - Providing a flat sheet (5) as a semi-finished product (10) of the at least one component part (1), preferably a rail, the sheet having a longitudinal extension (6), two top surfaces (7) and two side surfaces (9) spaced apart by the width (8) of the sheet (5), - Providing at least one indentation (13) on at least one top surface (7) of the sheet (5), preferably by means of at least one embossing punch and / or at least one embossing roller (12), wherein the at least one indentation (13) is arranged substantially parallel to the longitudinal extension (6), - Mechanically separating, preferably breaking, particularly preferably bending and separating the sheet (5) in the region of the at least one indentation (13), - Bending the separated sheet (5) such that the profile (15) of the at least one component part (1), preferably a rail, is formed in a cross-section (14) orthogonal to the longitudinal extension (6).

2. The method according to claim 1, wherein The at least one component part (1) is formed with a substantially burr-free taper (16) on at least one, preferably two longitudinal faces (51) of the profile (15), wherein preferably the taper (16) has a taper cross-section (18) which is substantially triangular (19), preferably isosceles triangular, the taper cross-section being orthogonal to the longitudinal extension (6) of the sheet (5), wherein the taper cross-section (18) is particularly preferably configured convexly and / or concavely.

3. The method according to claim 1 or 2, wherein, At least two opposing indentations (13) are arranged on the two top surfaces (7) of the sheet (5), the indentations preferably being stacked one above the other in a direction orthogonal to at least one of the two top surfaces (7).

4. The method according to any one of the preceding claims, wherein, The sheet (5) is mechanically separated, preferably broken, particularly preferably bent and separated at at least two, preferably at least two indentations (13) stacked one above the other.

5. The method according to any one of the preceding claims, wherein, The sheet (5) is severed without separation cutting, without stamping and without offcuts in the region of the at least one indentation (13), wherein the at least one indentation (13) serves as a rated fracture site during bending or separation of the sheet (5), wherein preferably the at least one component part (1) is formed without reprocessing.

6. The method according to any one of the preceding claims, wherein, The sheet (5) has a wall thickness (20) in the range from 0.5 mm to 1.8 mm, preferably between 0.6 mm and 0.8 mm.

7. The method according to any one of the preceding claims, wherein, Preferably during bending of the sheet (5), the sheet (5) is folded into a hem (21) in the region of at least one longitudinal face (51).

8. The method according to any one of the preceding claims, wherein, The at least one indentation (13) is introduced into the sheet (5) in the form of a groove (22) or profile (23) having an opening angle (24) in the range from 40° to 140°, preferably between 75° and 105°, particularly preferably substantially 90°.

9. The method according to any one of the preceding claims, wherein, The at least one indentation (13) has an indentation cross-section (25) orthogonal to the longitudinal extension (6) of the sheet (5), the indentation cross-section being in the form of a triangle (19), a trapezoid, an elliptical section and / or a circular section.

10. The method according to any one of the preceding claims, wherein For each component part (1), exactly two or four dimples (13) arranged in pairs on the two top surfaces (7) are respectively introduced into the flat sheet (5) parallel to the longitudinal extension (6), wherein the component part (1) is formed by one or two preferably successive breaks via the two or four dimples (13) of the sheet (5).

11. The method according to any one of the preceding claims, wherein, The sheet (5) is provided with a plurality of dimples (13) arranged in pairs on the two top surfaces (7), and then a plurality of component parts (1) are mechanically broken off.

12. The method according to any one of the preceding claims, wherein, At least one additional dimple (50) is arranged in the sheet (5) transversely, preferably substantially parallel to the longitudinal extension (6), wherein preferably it is provided that the particularly preferably bent sheet (5) is mechanically separated, particularly preferably broken or bent and separated, in the region of the at least one additional dimple (50) to form at least one substantially burr-free additional taper (52) on at least one end face (17) of the component part (1).

13. A drawer pull-out guide device (4) for movably supporting a drawer on a furniture body, comprising - at least one main rail (2) to be fixed to the furniture body and - at least one loading rail (3) to be connected to the drawer, the loading rail being movably supported relative to the at least one main rail (2) in the longitudinal direction (30), and - optionally at least one intermediate rail, the intermediate rail being at least partially arranged between the at least one main rail (2) and the at least one loading rail (3), and - optionally at least one container rail for being arranged on the at least one loading rail (3) and / or on the drawer, Among them, The at least one main rail (2) and / or the at least one loading rail (3) has a profile (15) formed by at least one flat sheet (5) in a cross-section (14) orthogonal to the longitudinal direction (30), characterized in that the at least one main rail (2) and / or the at least one loading rail (3) and / or at least one optionally existing intermediate rail and / or at least one optionally existing container rail as component parts (1) are manufactured by the method according to any one of the preceding claims, such that at least one, in particular two longitudinal faces (51) of the profile (15) of the at least one main rail (2) and / or the at least one loading rail (3) and / or the at least one optionally existing intermediate rail and / or the at least one optionally existing container rail are constructed with tapers (16).

14. The drawer pull-out guiding device (4) according to claim 13, wherein, At least one, in particular two end faces (17) of the profile (15) of the at least one main rail (2) and / or the at least one loading rail (3) and / or the at least one optionally existing intermediate rail and / or the at least one optionally existing container rail are constructed with additional tapers (52).

15. The drawer pulling guide device (4) according to claim 13 or 14, wherein, The tapering section (16) and / or the further tapering section (52) include an angle (31) in the range between 60° and 140°, preferably in the range between 75° and 105°, particularly preferably substantially 90°, wherein preferably it is provided that at least one, preferably two longitudinal faces (51) and / or end faces (17) are constructed substantially burr-free.

16. The drawer pull-out guiding device (4) according to any one of claims 13 to 15, wherein, The at least one body rail (2) and / or the at least one loading rail (3) have at least one fixing section (32) with a fixing side (33) which, when assembled on the furniture body or at least one furniture part, can at least partially bear against the furniture body or at least one furniture part, wherein the at least one fixing section (32) has at least one, preferably circular opening (35) for a fixing means, preferably a screw, to pass through, wherein the at least one opening (35) is surrounded on a second side (38) by a raised portion (39), the second side being spaced from the fixing side (33) by a material thickness in the range preferably between 0.5 mm and 1.8 mm, particularly preferably between 0.6 mm and 0.8 mm, and the raised portion protruding transversely from the second side (38).

17. The drawer pull-out guiding device (4) according to any one of claims 13 to 16, wherein, The at least one body rail (2) and / or the at least one loading rail (3) and / or the at least one optional intermediate rail and / or the at least one optional container rail are folded into a hem (21) in the region of at least one profile face (40) of the profile (15).

18. The drawer pull-out guiding device (4) according to any one of claims 13 to 17, wherein, The at least one tapering section (16) and / or the at least one further tapering section (52) have a tapering cross-section (18) parallel to and / or orthogonal to the longitudinal extension (6) of the sheet (5), the tapering cross-section being substantially in the form of a triangle (19), preferably an isosceles triangle, wherein preferably it is provided that the tapering cross-section (18) is constructed convex and / or concave.

19. A drawer pull-out guiding device (4) according to any one of claims 13 to 18, wherein, The profile (15) has at least one embossing (41) oriented preferably orthogonally to the longitudinal extension (6) of the sheet (5) for strengthening the profile (5), wherein preferably it is provided that the at least one embossing (41) extends on at least two substantially orthogonal profile faces (40), and / or there are provided at least two embossings (41) arranged alternately in the direction of the inner region (42) of the profile (15) and in the direction of the outer region (43) of the profile (15).

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