Patent Publication Number: US-2023157449-A1

Title: Furniture fitting for mounting a furniture part

Description:
BACKGROUND OF THE INVENTION 
     The invention relates to a furniture fitting for, preferably movably, mounting a first furniture part on a second furniture part. The furniture fitting has at least one metal piece manufactured from a metal sheet, in particular a connecting piece, with two surfaces that are spaced apart from one another by a material thickness of the metal sheet. Furthermore, the invention relates to a piece of furniture with at least one first and one second furniture part, wherein the piece of furniture comprises at least one such furniture fitting. In addition, the invention relates to a method for producing at least one such furniture fitting, preferably at least one runner, one flap fitting or one hinge. 
     Generic furniture fittings are known from the state of the art, wherein such commercially available furniture fittings are formed out of a metal sheet with a defined material thickness. 
     A disadvantage of the state of the art according to a first aspect is that the material thickness cannot be reduced without impairing a stability of the furniture fitting such that there is an increased risk of breakage during operation and/or installation of the furniture fitting. With a minimum material thickness to be adhered to, various problems are caused by an increased weight of the furniture fitting associated therewith—such as for example an increased cost in production, environmentally damaging quantities of material and/or increased transport resources required. In addition, reduced material thicknesses are desirable in terms of manufacturing technology in particular in the case of delicate geometrical structures. 
     A disadvantage of the state of the art according to a second aspect is an undesired generation of noise in handling the known furniture fittings. Due to insufficient sound absorption properties, sound is reflected unimpeded by the furniture fittings and/or is transferred substantially unimpeded over an extent of the furniture fitting. 
     A disadvantage of the state of the art according to a third aspect is that a weight of the furniture fittings in the case of particularly high demands on the furniture fittings, such as a connection to heavy furniture parts to be moved, increases to a large degree due to the necessary rigidity of the furniture fittings, as a result of which resources are inefficiently used and the furniture fittings are difficult to handle in terms of manufacturing technology. The option of using a large number of furniture fittings is an inadequate alternative which does not solve the problem and additionally cannot be implemented practically in a large number of pieces of furniture. 
     SUMMARY OF THE INVENTION 
     The objective technical problem of the present invention is therefore to specify a furniture fitting that is improved compared with the state of the art as well as a piece of furniture and a method for producing such a furniture fitting, in which the disadvantages of the state of the art are at least partially remedied and which are characterized in particular by enhanced stability and strength properties, a reduced weight and/or improved sound absorption properties of the furniture fitting. 
     Therefore, according to the invention, the two surfaces have at least one regular arrangement of successive elevations and depressions, wherein an elevation on one of the two surfaces lies opposite a depression on the other of the two surfaces, and vice versa. 
     Firstly, this makes it possible for an increased stability, in particular rigidity, load-bearing capacity, bending strength and torsional strength, to be able to be guaranteed in the case of an identical material thickness, through a deviation from a smooth surface. In the case of a transmission of force onto the at least one metal piece, forces can be absorbed by the at least one metal piece in a particularly beneficial way via the geometry that deviates from the smooth surface, in particular by means of an increased section modulus. This makes it possible for the material thickness of the at least one metal piece to be able to be reduced in the case of given demands on the at least one metal piece. 
     On the other hand, it is possible for the maximum demands on the at least one metal piece to be increased since, for example, in the case of maximum material thicknesses due to manufacturing technology, more weight can be received by the at least one metal piece in the case of an unchanged weight of the at least one metal piece via the depressions and elevations. In addition, by reducing the weight of the at least one metal piece, more metal pieces can be transported and resources such as material, costs and/or CO2 can be saved in the production. 
     In addition to this, there is the positive property that, through a surface structure obtained via the elevations and depressions, sound is absorbed to a large degree by the at least one metal piece via the at least one regular arrangement and is transferred to a small degree, as a result of which a reflection and/or a development of sound is lessened. In addition, the aesthetic appearance of the at least one metal piece is enhanced. 
     Through the surface structure—due to the at least one regular arrangement—a material and weight saving can be universally obtained in the case of a wide variety of types of furniture fitting, such as furniture hinges, furniture flaps, furniture fittings, furniture guides and/or component parts of furniture fittings, via a reduced material thickness with the same strength and/or an increased strength with the same material thickness, wherein in particular acoustic and visual properties are enhanced. 
     The regular arrangement can be introduced into the at least one metal piece—in particular partially or completely—for example by embossing, rolling and/or profiling before and/or after an optionally present bending and/or embossing step. Generally speaking, the regular arrangement can be introduced superimposed with respect to a ribbing and/or profiling in the at least one metal piece. 
     A corrugation of the at least one metal piece over the at least one regular arrangement causes an additional stiffening effect, wherein a neutral axis can be lengthened in the shaping of the at least one metal piece, for example existing sheet metal bending machines can be used and/or no incisions or one-sided dips in a surface of the at least one metal piece are necessary for the at least one regular arrangement. 
     As stated at the start, protection is also sought for a piece of furniture with at least one first furniture part and at least one second furniture part, wherein the piece of furniture comprises at least one such furniture fitting, with which the at least one first furniture part is mounted, preferably movably, on the at least one second furniture part. 
     This makes it possible for a reduced number of furniture fittings to be needed for moving and/or mounting the furniture parts, and for a visual appearance of the piece of furniture to be enhanced. In addition, heavier furniture parts with furniture fittings of a given material thickness—in particular a maximum material thickness—can be used in the piece of furniture. 
     As stated at the start, protection is also sought for a method for producing at least one such furniture fitting, preferably at least one runner, one flap fitting or one hinge, characterized by the following method steps, preferably following one another in terms of time in the indicated order:
         at least one flat metal sheet is provided,   in at least one partial area of the at least one metal sheet at least one regular arrangement of successive elevations and depressions is incorporated on two surfaces that are spaced apart from one another by a material thickness of the metal sheet, wherein an elevation on one of the two surfaces lies opposite a depression on the other of the two surfaces, and vice versa,   by at least one bending, punching, cutting, coating and/or embossing step the at least one metal sheet is formed into at least one component of the furniture fitting to be produced.       

     The method is particularly flexible in the production of the at least one furniture fitting since, for example after an introduction of a microstructure through the elevations and depressions, areas can be punched out of the metal sheet, which is also possible with settings of a punching machine for commercially available furniture fittings, then the metal sheet can be bent onto the desired geometric design and further punching operations can be effected by the punching machine, wherein embossings can be introduced into the microstructure present on the metal sheet at any time. 
     Protection is also sought for a use of the formation of at least one regular arrangement of successive elevations and depressions on two surfaces, which are spaced apart from one another by a material thickness of a metal sheet, of at least one metal piece manufactured from a metal sheet, in particular a connecting piece, of a furniture fitting, wherein an elevation on one of the two surfaces lies opposite a depression on the other of the two surfaces, and vice versa, in order to increase a rigidity and/or a sound absorption of the furniture fitting at least in areas. 
     Through the elevations and depressions, a particularly user-friendly furniture fitting can be provided, wherein the convenience of using the furniture fitting is increased. 
     According to an advantageous design of the invention, the at least one regular arrangement extends in a first direction and in at least one second direction transverse to the first direction, with the result that arranged adjacent to a depression in each case is a first elevation in the first direction and a second elevation in the second direction. 
     The at least one metal piece thereby has a two-dimensional regular arrangement, as a result of which material thickness can be particularly effectively reduced with the same stability and/or strength. In addition, the visual and acoustic properties of the furniture fitting are particularly positively influenced. 
     It has proved to be particularly beneficial that a neutral axis of the at least one metal piece is bidirectionally plastically deformed, with the result that the neutral axis is deformed by the at least one regular arrangement—preferably symmetrically, substantially sinusoidally and/or alternately—both in the direction of the first surface and in the direction of the second surface. 
     It is advantageously provided that, in each case on a surface, maxima of the elevations and depressions of the at least one regular arrangement are arranged on imaginary lines which are arranged substantially parallel to one another. Preferably, the elevations and depressions of a first line are arranged offset by half a spacing between two elevations or depressions compared with the elevations and depressions of a second line directly adjacent to the first line. 
     Through this geometric arrangement of the elevations relative to the depressions, material-specific characteristics such as bending strength, are enhanced to a particularly high degree, in particular through a particularly advantageous exploitation of the section modulus. 
     It has proved to be beneficial that the elevations and/or depressions of the at least one regular arrangement are formed substantially pyramid-shaped, conical, truncated-pyramid-shaped or frustoconical. Generally speaking, however, the shape of the elevations and/or depressions is as desired. 
     According to an advantageous embodiment of the invention, the material thickness of the metal sheet is substantially the same over the entire area of the at least one regular arrangement. 
     Apart from marginal material thickness differences caused, for example, by a stretching process in the introduction process step during a rolling, embossing and/or profiling process of the at least one regular arrangement between maxima and edges of the elevations and/or depressions, the at least one sheet metal part can have a substantially constant material thickness. 
     It has proved to be advantageous that the at least one metal piece has at least one embossing, which extends over at least two elevations and/or depressions of the at least one regular arrangement. 
     Embossings with a wide variety of functionalities are generally not disrupted by the at least one regular structure and/or can utilize sound-reducing and rigidity-increasing properties. 
     An advantageous variant is that the at least one regular arrangement of successive elevations and depressions has at least one periodicity. 
     For example, in each case, an elevation can follow a depression in both directions. The regular arrangement is, however, not limited to a specific periodicity in the sequence of the elevations and depressions. 
     It is particularly preferred that the material thickness of the metal sheet lies between 0.3 mm and 2.5 mm, preferably 0.4 mm and 2.0 mm, and particularly preferably is 0.5 mm or 0.7 mm. 
     In an embodiment of the invention, on both surfaces in each case at least three elevations that are preferably adjacent to one another have maxima which are arranged in each case in a common plane, and a normal spacing of these planes is between 0.1 mm and 1.0 mm, preferably 0.2 mm and 0.4 mm, larger than the material thickness of the metal sheet. 
     According to a preferred embodiment of the invention, two elevations and/or depressions that follow one another directly on one of the two surfaces have a spacing of between 1.6 mm and 21.0 mm, preferably 2.0 mm and 10.0 mm, particularly preferably 3.5 mm and 6.5 mm. 
     It has proved to be beneficial that on both surfaces in each case, at least three elevations that are preferably adjacent to one another have maxima which are arranged in each case in a common plane. These planes have a normal spacing and two elevations and/or depressions that follow one another directly on one of the two surfaces have a spacing, wherein the spacing is 2 to 8, preferably 3 to 7, particularly preferably 4 to 6, times as large as the normal spacing. 
     Furthermore, preferably on one of the two surfaces at least three elevations that are preferably adjacent to one another have maxima which are arranged in a common plane, and at least three depressions that are preferably adjacent to one another have maxima which are arranged in a common plane. The planes have a normal spacing which is between 0.1 and 0.6, preferably between 0.2 and 0.4, times as large as the material thickness of the metal sheet. 
     The at least one sheet metal part can be adjusted specifically to the desired properties through an appropriate choice of material thickness, normal spacing of the planes, an extent of the elevations and/or depressions which is lateral and/or points in the direction of the surface and the spacing between maxima. 
     Generally speaking, the elevations can be formed differently from the depressions—for example through varying extents and/or geometries. The elevations and depressions are particularly preferably formed similar and/or symmetrical. 
     Alternatively, it is possible for the at least one regular arrangement to:
         extend over more than 50%, preferably more than 75%, of the at least one metal piece, preferably of a finished component of the furniture fitting, particularly preferably of the furniture fitting, or   extend only over at least one local area, preferably wherein the local area is arranged at an edge of the at least one metal piece and/or at a connection point of the at least one metal piece, at which the at least one metal piece is connected or can be connected to a further component of the furniture fitting.       

     A partial regular arrangement on the at least one metal piece makes it possible to reinforce specific areas of the at least one metal piece in a targeted manner and/or to adapt them to individual requirements. Generally speaking, the at least one metal piece can also be completely provided with the at least one regular arrangement. 
     According to an advantageous design of the invention, the at least one metal piece has at least one flat surface, which is free of the at least one regular arrangement. 
     It is thereby made possible, for example, to provide areas having increased rolling and/or sliding properties. 
     According to an advantageous design of the invention, the at least one metal piece has a first sound absorption in the area of the at least one flat surface, and the at least one metal piece has a second sound absorption in an area with the at least one regular arrangement, wherein the second sound absorption is at least 1.1 times, preferably 1.5 times, greater than the first sound absorption. 
     It is advantageously provided that the at least one metal piece has a first rigidity in the area of the at least one flat surface, and the at least one metal piece has a second rigidity in an area with the at least one regular arrangement, wherein the second rigidity is at least 1.1 times, at least 1.5 times, greater than the first rigidity. 
     Both acoustic properties and a load-bearing capacity of the at least one metal piece can be enhanced by the at least one regular arrangement compared with a commercially available metal piece with smooth surfaces. 
     It has proved to be beneficial that the at least one flat surface is formed as a running surface for a rolling element moving on the running surface, preferably wherein the at least one metal piece has a longitudinal direction and the at least one running surface is formed as a track, which is aligned substantially parallel to the longitudinal direction of the at least one metal piece. 
     The at least one flat surface makes it possible to particularly benefit a rolling behaviour of a rolling element, wherein for example no precession of the rolling element due to unevennesses in the track is to be expected. 
     According to an advantageous embodiment of the invention, the at least one metal piece has at least two geometrically different regular arrangements. 
     Through two geometrically different regular arrangements, the at least one metal piece can be equipped with areas with varying properties—for example via different warping through varying heights from maxima of the depressions to maxima of the elevations and/or specific profile shapes of the depressions and elevations. 
     It has proved to be advantageous that the at least one metal piece has at least one punching, preferably wherein the at least one punching is formed for receiving at least one fastening means, and/or is formed as a fastening means for at least one furniture component, and/or is formed substantially cylindrical, and/or is formed for mounting at least one hinge pin, and/or releases at least one adjustment element of an adjustment device, with the result that the adjustment element can be actuated by means of at least one tool. 
     An advantageous variant is that the at least one metal piece is arranged on a profiled component of the furniture fitting, preferably wherein the component is formed U-shaped in a cross section at least in areas. 
     Generally speaking, the at least one metal piece can be connected to the profiled component by material bonding or detachably or can be formed as a profiled component. Bent sheet metal parts with a wide variety of profile shapes are suitable in a particularly beneficial way for the at least one regular arrangement. 
     It is particularly preferred that the furniture fitting is formed as a runner, flap fitting or hinge. 
     According to an advantageous design of the invention, the at least one bending, punching, cutting, coating and/or embossing step is effected after the incorporation of the at least one regular arrangement. 
     A removal of local areas by a laser can be deemed to be a cutting step, for example. It is also conceivable to carry out bending, punching, cutting, coating and/or embossing steps before or both before and after the introduction of the at least one regular arrangement. 
     It is advantageously provided that the at least one regular arrangement:
         is incorporated in the at least one partial area of the at least one metal sheet by means of at least one stamp and/or at least one roller, and/or   is incorporated starting from both surfaces.       

     For example, dies and/or embossing stamps with a wide variety of designs and/or cold roll forming methods can be used for an incorporation of the at least one regular arrangement. 
     It has proved to be beneficial that a neutral axis of the at least one metal sheet is lengthened during the incorporation of the at least one regular arrangement. 
     According to an advantageous embodiment of the invention, the at least one metal sheet is stretched during the incorporation of the at least one regular arrangement at least in the area in which the at least one regular arrangement is incorporated. 
     Through a formation of the elevations and depressions or of a shaping procedure, the neutral axis is stretched and in particular displaced in the direction of a curvature. 
     It has proved to be advantageous that, in a further method step, at least one embossing which extends over at least two elevations or depressions of the at least one regular arrangement is embossed into the at least one metal sheet. 
     An advantageous variant is that at least one, preferably strip-shaped, surface area of the at least one metal sheet is left blank during the incorporation of the at least one regular arrangement. 
     Particularly preferable, in at least one second partial area of the at least one metal sheet, at least one further regular arrangement is incorporated on the two surfaces. The at least one further regular arrangement is geometrically different from the at least one other regular arrangement. 
     Furthermore, it is particularly preferred that in a further method step, the at least one component of the furniture fitting to be produced is connected to at least one further component, preferably by gluing, riveting, TOX clinching, soldering and/or welding, and/or in a further method step the furniture fitting is fitted with at least one drive device and/or at least one damper. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       Further details and advantages of the present invention are explained in more detail below on the basis of the description of the figures with reference to the embodiment examples represented in the drawings, in which: 
         FIGS.  1   a - 1   b    show a furniture fitting in the form of a runner according to the state of the art in a perspective view and a view from the side, 
         FIGS.  2   a - 2   b    show a further furniture fitting in the form of a runner according to the state of the art in a perspective view, 
         FIGS.  3   a - 3   b    show a furniture fitting in the form of a flap fitting according to the state of the art in a perspective view and a view from the side, 
         FIGS.  4   a - 4   b    show a furniture fitting in the form of a hinge according to the state of the art in a perspective view and a view from the side, 
         FIG.  5    is a cross section of a regular arrangement of a furniture fitting according to the invention in a schematic representation, 
         FIGS.  6   a - 6   b    show a regular arrangement of a furniture fitting according to the invention in a perspective view, 
         FIG.  7    shows a metal sheet with a regular arrangement for a furniture fitting according to the invention in a view from above, 
         FIG.  8    shows a furniture fitting in the form of a runner according to a preferred embodiment example in a perspective view with a detailed view of the runner, 
         FIGS.  9   a - 9   b    show a detailed view of a furniture fitting in the form of a runner according to a further preferred embodiment example in a perspective view and a view from above, 
         FIG.  10   a    shows a metal sheet with a regular arrangement for a furniture fitting in the form of a runner according to a further preferred embodiment example with two running surfaces, embossings and punchings before a bending procedure in a view from above with a detailed view, 
         FIG.  10   b    shows the furniture fitting after a bending procedure and a further punching of the metal sheet according to  FIG.  10   a    in a view from above. 
     
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       FIGS.  1   a  to  4   b    show designs of furniture fittings  1  from the state of the art and not according to the invention without a regular arrangement  9  of elevations  10  and depressions  11 . The regular arrangement  9  can be used in all available metal pieces  5  in order to improve the respective furniture fitting  1  in terms of stability, strength, weight, transport properties, acoustic properties and visual properties. 
       FIG.  1   a    shows a furniture fitting  1  in the form of a runner  33  with a plurality of embossings  16  and punchings  29 , which have been introduced into a component  20 . The furniture fitting  1  comprises four metal pieces  5  in the form of a connecting piece, which are formed by a bending procedure of a metal sheet  4 . 
       FIG.  1   b    differs from  FIG.  1   a    to the effect that the runner  33  is represented from a viewing direction from the side. The four metal pieces  5  have in each case two surfaces  7 ,  8 , which are spaced apart from one another by a material thickness  6 . 
       FIG.  2   a    shows an arrangement with a runner  33  of a drawer and with a drawer side wall  38  in a perspective view. Fastening portions  39 ,  40  of a first guide rail  41  have in each case one or more fastening points  42 ,  43  for fastening to a furniture carcass. A third guide rail  44  is connected or can be detachably connected to the drawer side wall  38 , wherein a second guide rail  45  is movable between the first guide rail  41  and the third guide rail  44 . 
     A coupling element  46 , which can be detachably coupled to a follower  47  of a draw-in mechanism  48  mounted on the third guide rail  44 , is arranged on the first guide rail  41 , with the result that towards the end of the closing movement the third guide rail  44  is caught by the follower  47  and can be drawn into a closed end position by an energy storage means of the draw-in mechanism  48 . Through a damping device  49 , preferably with a hydraulic piston-cylinder unit, this spring-supported drawing-in movement of the third guide rail  44  can be damped as far as a closed end position. 
     The drawer side wall  38  is formed as a hollow-chamber profile with an inner profile wall  50  and an outer profile wall  51  spaced apart therefrom, wherein the drawer side wall  38  forms a channel  52  that is open at the bottom and extends in the longitudinal direction of the drawer side wall  38 , and in which the third guide rail  44  can be arranged. The drawer side wall  38  furthermore has a first fastening mechanism  53  for connection to a rear wall, a second fastening mechanism  54  for connection to a front panel and a support  55  for supporting a drawer base. 
       FIG.  2   b    shows the first guide rail  41  with the fastening portions  39 ,  40  to be installed on the furniture carcass. The first guide rail  41  has a U-shaped or C-shaped portion in cross section, in which a carriage  56  and a further carriage  57  that is separate therefrom are displaceably mounted for guiding and supporting the second guide rail  45 . The carriage  56  and the further carriage  57  are displaceably mounted in a common running surface  26 . The carriage  56  has load-transmitting rolling elements  27 , the axes of rotation of which are spaced apart from one another in the vertical direction and are thus arranged in running surfaces  26  separate from one another. The carriage  56  furthermore also has lateral supporting rollers  57  with axes of rotation running vertically in the installed position, wherein the lateral supporting rollers  57  are movable along a vertical connecting piece of the first guide rail  41  running in the longitudinal direction (L) on the one hand and on a vertically running connecting piece of the second guide rail  45  on the other hand. Through a tooth system  58  arranged or formed on the carriage  56 , a movement of the carriage  56  can be synchronized, via a cog wheel, with a movement of a further carriage  56  which is displaceably mounted between the second guide rail  45  and the third guide rail  44 . 
       FIG.  3   a    shows a furniture fitting  1  in the form of a component  20  formed as a flap fitting  34 . Punchings  29  in the surfaces  7 ,  8  through the material thickness  5  are formed for receiving fastening means  30  and cylindrical, wherein it is possible to mount a hinge pin in the punchings  29 . 
       FIG.  3   b    differs from  FIG.  3   a    merely to the effect that the furniture fitting  1  is shown from the side. The flap fitting  34  has three metal pieces  5 , onto which a regular arrangement  9  can be introduced. 
       FIG.  4   a    shows a furniture fitting  1 —formed as a hinge  35 —with punchings  29 , which an adjustment element  31  of an adjustment device  32  releases, with the result that the adjustment element  31  can be actuated by means of a tool. 
     The furniture fitting  1  is formed to effect a movable mounting of a first furniture part on a second furniture part, wherein the furniture fitting  1  has metal pieces  5  manufactured from a metal sheet  4  which are formed in the form of connecting pieces. 
       FIG.  4   b    differs from  FIG.  4   a    merely to the effect that the furniture fitting  1  is represented in a front view. It is conceivable to introduce a regular arrangement  9  into the three metal pieces  5  before or after a bending procedure of the metal sheet  4  of the furniture fitting  1 , wherein the regular arrangement  9  is particularly preferably introduced before the bending procedure. 
       FIG.  5    shows a metal sheet  4  with two surfaces  7 ,  8  that are spaced apart from one another by a material thickness  6  of the metal sheet  4 , wherein both surfaces  7 ,  8  have a (schematically represented) regular arrangement  9  of successive elevations  10  and depressions  11 , wherein an elevation  10  on one of the two surfaces  7 ,  8  lies opposite a depression  11  on the other of the two surfaces  8 ,  7 , and vice versa. The material thickness  6  of the metal sheet  4  is (not limitatively) chosen to be 0.5 mm. 
     A neutral axis  36  is drawn in schematically with a dashed line in the sense of a reference plane relative to the elevations  10  and depressions  11  (due to the introduction of the regular arrangement  9 ). 
       FIG.  6   a    shows a three-dimensional design of the regular arrangement  9 , wherein the regular arrangement  9  extends in a first direction  12  and in a second direction  13  transverse to the first direction  12 , with the result that arranged adjacent to a depression  11  in each case is a first elevation  10  in the first direction  12  and a second elevation  10  in the second direction  13 . 
     In each case on a surface  7 ,  8 , maxima  14  of the elevations  10  and depressions  11  of the regular arrangement  9  are arranged on imaginary lines which are arranged parallel to one another. The elevations  10  and depressions  11  of a first line are arranged offset by half a spacing  19  between two elevations  10  or depressions  11  compared with the elevations  10  and depressions  11  of a second line directly adjacent to the first line, as a result of which an enhancement of the bending rigidity is particularly favoured by a wave structure in two dimensions. 
     The elevations  10  and depressions  11  of the regular arrangement  9  are introduced due to a pressing-in of a pointed extension of a roller or a stamp, wherein a shape of the elevations  10  and depressions  11  is formed truncated-pyramid-like with a fillet radius depending on the material thickness  6 . Generally speaking, the shape can also be formed pyramid-shaped, conical or frustoconical. 
     On both surfaces  7 ,  8  three adjacent elevations  10  have maxima  14  which are arranged in each case in a common plane  17 , wherein a normal spacing  18  of these planes  17  is increased by the regular arrangement  9  compared with the material thickness  6 . In this embodiment, an increase of 0.2 mm in the material thickness due to the elevations  10  and depressions  11  has been chosen. 
     Two elevations  10  and depressions  11  following one another directly on one of the two surfaces  7 ,  8  have a spacing  19  of 3.5 mm, which can however be adapted depending on the requirements of the furniture fitting  1 . 
       FIG.  6   b    shows the surface structure of the regular arrangement  9 , wherein a lower contour of the elevations  10  and depressions  11  is indicated with dashed lines, as a result of which it can be seen that the material thickness  6  of the metal sheet  4  is the same or constant over the entire area of the regular arrangement  9  (disregarding varying plastic deformations between the maxima  14  and edges of the elevations  10  and depressions  11 ). 
     Two elevations  10  and depressions  11  following one another directly have a spacing  19  on one of the two surfaces  7 ,  8 , wherein the spacing  19  has been chosen to be five times as large as the normal spacing  18 . 
     The planes  17  between the maxima of the elevations  10  and the maxima  14  of the depressions  11  have a normal spacing  18 ′, which is 0.2 times as large as the material thickness  6  of the metal sheet  4 . 
       FIG.  7    shows the metal sheet  4  for producing the furniture fitting  1 , wherein the regular arrangement  9  of successive elevations  10  and depressions  11  has a periodicity. The periodicity is formed in the form of a two-dimensional alternation of elevations  10  and depressions  11  (analogously to a sinusoidal wave structure). 
     Punchings  29  and/or embossings  16  can be performed before a bending procedure and/or after a bending procedure for forming the component  20 . 
       FIG.  8    shows a runner  33 , wherein in the detailed view it can be seen that the metal pieces  5  have embossings  16 , which extend over a plurality of elevations  10  and depressions  11  of the regular arrangement  9 . 
     Generally speaking, different metal pieces  5  can have different regular arrangements  9  with specific geometries. Varying regular arrangements  9  within a metal piece  5 , which can differ for example in the periodicity, the spacing  19  and/or a normal spacing  18 ,  18 ′, are also conceivable. The regular arrangement  9  extends over 100% of the furniture fitting  1 . 
       FIG.  9   a    shows that the metal pieces  5  are arranged on a profiled component  20  of the furniture fitting  1 , wherein the component  20  is formed U-shaped in a cross section in areas. The regular arrangement  9  can be seen on both surfaces  7 ,  8  in the form of elevations  10  and depressions  11 . 
       FIG.  9   b    differs from  FIG.  9   a    merely to the effect that the runner  33  is represented in a view from above. The detail of a surface structure of the regular arrangement  9  shows that the metal pieces  5  have punching  29  and among other things are formed as a fastening means  30  for a furniture component. 
       FIG.  10   a    shows a metal sheet  4  with a regular arrangement  9 , wherein the regular arrangement  9  extends over extensive local areas. Generally speaking, the local area can also be arranged only at an edge  22  of a metal piece  5  and/or at a connection point  23  of a metal piece  5 , at which the metal piece  5  is connected or can be connected to a further component  24  of the furniture fitting  1 . 
     In this embodiment, the metal sheet  4 , which comprises the metal pieces  5  after a bending procedure, has two flat surfaces  25  which are free of regular arrangement  9 . 
     An exemplary method sequence via which the furniture fitting  1  can be manufactured is indicated below:
         a flat metal sheet  4  without regular arrangement  9  is provided,   at least one regular arrangement  9  of successive elevations  10  and depressions  11  is incorporated in the metal sheet  4  on the two surfaces  7 ,  8  that are spaced apart from one another by the material thickness  6  of the metal sheet  4 , wherein an elevation  10  on one of the two surfaces  7 ,  8  lies opposite a depression  11  on the other of the two surfaces  7 ,  8 , and vice versa,   wherein the at least one regular arrangement  9  is incorporated into the metal sheet  4  by means of a stamp and/or two rollers starting from both surfaces  7 ,  8 , wherein the neutral axis  36  of the metal sheet  4  is lengthened during the incorporation of the at least one regular arrangement  9  and the metal sheet is stretched in the area in which the at least one regular arrangement  9  is incorporated, and   by bending, punching, cutting, coating and/or embossing steps the metal sheet  4  is formed into the component  20  of the furniture fitting  1  to be produced.       

     Generally speaking, the bending, punching, cutting, coating and/or embossing steps can be effected after the incorporation of the at least one regular arrangement  9  or following the incorporation. 
     In a further method step, an embossing  16  which extends over a plurality of elevations  10  or depressions  11  of the at least one regular arrangement  9  can be embossed into the metal sheet  4 . 
     In this embodiment of the invention, two strip-shaped surfaces  25  of the metal sheet  4  have been left blank during the incorporation of the regular arrangement  9  in order to utilize the surface areas  25  as tracks for rolling elements  27 . 
     In the case of a plurality of regular arrangements  9 , the regular arrangements  9  differ from one another in terms of their geometry. 
     In a further method step the component  20  can be connected to further components, for example by gluing, riveting, TOX clinching, soldering and/or welding. Fitting with a drive device, a damper and/or the like is also possible in order to broaden the functionality of the furniture fitting  1 . 
       FIG.  10   b    shows the furniture fitting  1  as a runner  33 , wherein the metal pieces  5  have a first sound absorption in the area of the flat surface areas  25 , and the metal pieces  5  have a second sound absorption in an area with the regular arrangement  9 , wherein the second sound absorption is increased by 10% compared with the first sound absorption. Analogously, a second rigidity in the area of the regular arrangement  9  is increased by 10% compared with a first rigidity in the area without regular arrangement  9 . 
     The two flat surfaces  25  are formed as running surfaces  26  for rolling elements  27  moving on the running surface  26  (cf.  FIG.  2   b   ), wherein the metal pieces  5  have a longitudinal direction  28  and the running surfaces  26  are formed as a track, which is aligned parallel to the longitudinal direction  28  of the metal pieces  5 . 
     In the case of a piece of furniture with a first furniture part and a second furniture part, the furniture fitting  1 , with which the first furniture part is movably mounted on the second furniture part, can be used.