Abstract:
A carcass rail for a guiding device, by way of which a movable furniture part during opening and/or closing is guidable on a furniture carcass of an item of furniture. The carcass rail has a cross sectional profile including several even profile portions extending along a longitudinal axis of the carcass rail, wherein at least two of the profile portions are connected by means of a bending edge which extends along the longitudinal axis. A side profile portion of the cross sectional profile is mounted on a side wall portion in the furniture carcass. At least one free-standing mounting strap for connecting to the side wall portion of the furniture carcass is connected integrally and continuously to the side profile portion and extends over a portion of the longitudinal axis of the carcass rail. In addition, a method for producing the carcass rail is disclosed.

Description:
CROSS REFERENCE TO RELATED APPLICATION 
       [0001]    This application claims the benefit under 35 USC §119(a)-(d) of German Application No. 10 2013 010 577.3 filed Jun. 26, 2013, the entirety of which is incorporated herein by reference. 
       FIELD OF THE INVENTION 
       [0002]    The invention relates to a carcass rail for a guiding apparatus and to a guiding apparatus, an item of furniture and a method for producing a carcass rail. 
       BACKGROUND OF THE INVENTION 
       [0003]    The most varied designs of carcass rails are known in the area of furniture construction. As a component part, for example of a guiding unit of a guiding apparatus for a movable furniture part such as, for example, a drawer, they are generally realized for mounting on a furniture carcass in order to mount the movable furniture part there in a predetermined position so as to be displaceable. In this case, one of the functions of the carcass rail is to transmit different force actions onto one or several mounting positions at which the carcass rail is fixedly mounted with a furniture carcass. On the one hand, it is desired in this connection that the carcass rail is deformed as little as possible when there are changes in the force action. On the other hand, the carcass rail is to be comparatively space-saving and is to have relatively little impact on the appearance of an item of furniture, in particular of the furniture carcass. 
         [0004]    A known design of carcass rails includes, for example, a profile rail, produced for example from sheet metal, and one or several mounting brackets which are connected to the profile rail. In this case, designs are known both where a mounting bracket is rigidly connected to a profile rail and such where different positions of a profile rail can be adjusted on a mounting bracket. Such designs can be linked to a comparatively high level of expenditure on production and to a requirement for a large amount of material. 
       SUMMARY OF THE INVENTION 
       [0005]    The object of the present invention is to provide a carcass rail which is improved for an efficient and cost-efficient production of items of furniture which have a movable furniture part. 
         [0006]    The invention proceeds from a carcass rail for a guiding apparatus, by way of which a movable furniture part during opening and/or closing is guidable on a furniture carcass of an item of furniture. The carcass rail is provided with a cross sectional profile which has several even profile portions which extend along a longitudinal axis of the carcass rail, wherein in each case two of the profile portions are connected together by means of a bending edge which extends along the longitudinal axis. In addition, a first of the profile portions is a side portion of the cross sectional profile which in the mounted state is provided for arrangement on a side wall portion in the furniture carcass. 
         [0007]    The core of the invention is that at least one free-standing mounting strap for an assembly on a side wall portion of the furniture carcass is realized on the first profile portion, said mounting strap being connected integrally and continuously on the one side to the remaining carcass rail, in particular to the first profile portion, and extending over a part portion of the longitudinal axis of the carcass rail. In this case, several mounting straps, separated from one another, can also be realized standing freely and extending over a part portion of the carcass rail, each of which is connected together integrally and on one side with the remaining carcass rail and in particular with first profile portion. 
         [0008]    The integral connecting between the mounting strap and the remaining carcass rail presents the advantage that at least one region of the carcass rail, which is provided for mounting the carcass rail on the furniture carcass, for example using fastening elements, is connected to the remaining carcass rail by a homogeneous material connection. As a result, the mounting strap and the remaining carcass rail are connected in a comparatively reliable manner, hardly any or absolutely no movement play being able to be formed at the connection as at a connection with adjoining boundary faces, for example at a screw-type connection or at, for example, a rivet connection. The advantage of the integral connection compared to a weld connection is that there is hardly any or there is no creation of thermally loaded points which differ from the surrounding material by means of changed material characteristics such as, for example, elasticity or ductility. Consequently, even the risk of a connection between a carcass rail and a mounting element mounted thereon rupturing is avoided on the carcass rail according to the invention. 
         [0009]    In addition, the carcass rail and in particular part of the mounting means can be realized advantageously in a space-saving manner because the placing in position and connecting of additional material for a mounting element such as, for example, a mounting bracket is no longer required. 
         [0010]    The use of material can be adapted in a comparatively better manner to a load-bearing capacity striven for by using a free-standing mounting strap which extends over a part portion of the longitudinal axis of the carcass rail. Thus, the mounting strap and the connection thereof to the remaining carcass rail can be restricted to a surface, the size of which is sufficient to avoid cracking and breaking off at the mounting means, for example at a hole or similar openings, under predetermined loads. This leads to the further advantage that the carcass rail according to the invention can be produced in a comparatively material-saving manner. Consequently, a comparatively small weight and a reduced space requirement can be achieved, as a result of which a carcass rail according to the invention also offers advantages with reference to packaging and transport. 
         [0011]    The free-standing mounting strap provides the advantage that mounting means, which are arranged on the mounting strap, can be comparatively easy to reach during assembly or disassembly and can be positioned so as to be easily seen on the carcass rail. To this end, the mounting strap is preferably realized protruding beyond an outer contour or a portion of an outer contour of the remaining carcass rail. 
         [0012]    The mounting strap is preferably realized so as to stand out freely from a top edge of the first profile portion. In particular, the mounting strap is bent off together with the first profile portion on a bending edge of a second profile portion. In this way, the mounting strap can project advantageously beyond further profile portions of the carcass rail and, where applicable, even beyond further rails which are mounted displaceably on the carcass rail, in particular in the case of assembly on a carcass of an item of furniture. 
         [0013]    In addition, the mounting strap can be connected to the remaining carcass rail, in particular to the first profile portion, by means of at least one bending edge. Consequently, it is achievable, for example, that once the mounting strap has been mounted on the furniture carcass, the first profile portion is arranged standing out from a surface of the furniture carcass at a predefined angle. In addition, one or several bending edges and connecting portions lying therebetween can be provided for the purpose of arranging the first profile portion at a predefined spacing from the furniture carcass. 
         [0014]    A preferred design of the invention is that the mounting strap is arranged on a laterally protruding region of a center profile portion, hereafter called the center portion, of the carcass rail. A center portion connects profile portions of the carcass rail, between which the center portion is arranged and which are connected together by the center portion. The center portion is arranged, in particular, between side portions. In this case, it is preferred, in particular, for the center portion to be widened in the part portion of the longitudinal axis over which the mounting strap is realized at right angles to the longitudinal axis. The widened center portion, in conjunction with the mounting strap, can form a mounting bracket which is continuously integral with the carcass rail and holds the remaining carcass rail at a predefined spacing from an inside surface of the furniture carcass. As a result, using the carcass rail according to the invention, a pull-out rail, for example can be arranged at such a spacing from a, for example, side wall that, for example, a bottom of a drawer rests on the pull-out rail and can be supported by the same. 
         [0015]    In order to achieve a method of construction that saves material, the mounting strap is realized over a part portion, i.e. part of an overall length, of the carcass rail along the longitudinal axis of the same and not over its overall length. When only one mounting strap is realized connected integrally and continuously on one side on the carcass rail, the mounting strap and correspondingly the part portion can, for example, be extended over more than half the overall length of the carcass rail. The mounting strap is preferably extended over a maximum of half the length of the carcass rail along the longitudinal axis. In particular, the mounting strap is realized over less than half, preferably over less than a third, in a particularly preferred manner over less than a quarter and where applicable over a tenth or less of the overall length of the carcass rail over a correspondingly long part portion. A length of the part portion for the mounting strap can be determined by, for example, one single element of the mounting means being realized on the mounting strap with a predetermined load-bearing capacity. In particular when the mounting strap extends over less than half of the overall length of the carcass rail, in particular of the first profile portion, several mounting straps can be provided in an advantageous manner. As a result, the carcass rail is comparatively light and space-saving. Furthermore, it can be produced, where applicable, with an advantageously small amount of material scrap. 
         [0016]    A preferred design of the carcass rail provides that, with reference to the longitudinal axis, the mounting strap is realized in a front end region of the carcass rail which is provided for arrangement in the front region of the furniture carcass. Through a comparatively space-saving design of the mounting strap, it is possible to mount the carcass rail in the front region of the furniture carcass in an advantageously unobtrusive manner. In this case, a dimension of the mounting strap can be restricted to, for example, a predetermined material thickness, in particular of a metal sheet, from which the carcass rail is produced. To support the carcass rail in a sturdy manner, a mounting device, e.g. in the form of a hole for screw-fastening or in the form of a recess for a, for example, plug-in connection, can be realized in the remaining region of the carcass rail to one side of the part portion for the mounting strap. The mounting device is preferably integrally formed on the carcass rail. 
         [0017]    The mounting strap can be arranged plane-parallel to one of the profile portions, in particular to a further side portion. As a result, an arrangement of the carcass rail in the course of assembly on the furniture carcass can be advantageously checked in a comparatively simple manner by way of the mounting strap. When the mounting strap is realized in particular on a top edge of the first profile portion, a concentration of carrying forces on a comparatively narrowly defined region of the carcass rail and distortions of the carcass rail produced as a result can be avoided in an advantageous manner. 
         [0018]    Reinforcement is preferably realized on the mounting strap and/or on the first profile portion, in particular in the part portion of the longitudinal axis of the carcass rail. For this purpose, the profile portion which is continuously connected to the mounting strap can have a channel-like arch which extends transversely, in particular at right angles to the longitudinal axis of the carcass rail. The reinforcement preferably extends from the first profile portion as far as into a further profile portion by way of which the first profile portion is connected to a bending edge. In this case, the bending edge is preferably interrupted by the arch. Where applicable, the reinforcement, in particular the channel-shaped arch, can extend as far as into the mounting strap. Through the channel-like arch, the carcass rail can be reinforced on the part portion in such a manner that carrying forces are distributed comparatively favorably onto the remaining carcass rail and that a concentration of stresses in the material of the carcass rail is avoidable. Through the integral design of the mounting strap on the carcass rail, force distribution is easier to calculate, as a result of which the use of material and the design of a reinforcement on the carcass rail according to the invention can be designed in a comparatively more efficient manner. The reinforcement in the part portion in the vicinity of the mounting strap can also be realized by an additionally mounted reinforcement element which, for example, is welded-on or, for example, riveted-on in the part portion, in particular on a bending edge. 
         [0019]    At least one mounting element, for example a hole for screw-fastening, is preferably realized on the mounting strap. The mounting element can, for example, be a hole, an elongated hole, a dowel, a journal, a threaded journal or, a hook. In this case, the mounting strap can also have several mounting elements and, where applicable, different mounting elements. 
         [0020]    In addition, it is preferred for one of an offset and a bend to be realized on a connection between the mounting strap and the remaining carcass rail. In particular, a bend can be realized between the mounting strap and the first profile portion. As a result, a connection between the mounting strap and the remaining carcass rail can be realized in a reinforced and comparatively more solid manner in order to achieve an advantageously uniform distribution of carrying forces between the mounting strap and the remaining carcass rail. In order to reduce a risk of cracking or rupture on the one-sided and integral connection between the free-standing mounting strap and the remaining carcass rail, a bend can be pulled in a linear manner along one or several edges, the rectilinear bend preferably being realized beyond a connection point at which a boundary edge of a profile portion and a boundary edge of the mounting position meet one another. 
         [0021]    A guiding apparatus with a carcass rail according to the invention, in particular according to one or several of the aforementioned designs can be constructed in a comparatively space-saving and light manner. An item of furniture with a carcass rail according to the invention consequently enables improved use of space in particular in the furniture carcass, as a result of which comparatively more stowing space for example in movable furniture parts such as, for example, a drawer can be provided. In this case, guiding of the movable furniture part can be realized in an unobtrusive manner as regards the appearance of the item of furniture according to the invention. 
         [0022]    A further object of the invention consists in a method for producing a carcass rail, where a sheet metal plate, from which the carcass rail is formed, is separated out from a metal sheet. For the method, in this case, it is essential that the mounting strap is bent off from a sheet portion from which a profile portion of the carcass rail is realized. In this connection, the mounting strap can be bent off together with the first profile portion from the sheet portion for a profile portion in order to realize the mounting strap and the first profile portion, for example, plane-parallel with respect to one another. As a result, the number of bending edges can be kept comparatively small in order to produce the carcass rail in an advantageously simpler manner. 
         [0023]    The sheet metal plate is realized with an outline which includes a preferably rectangular base portion for realizing profile portions of the carcass rail. In this case, a rectangular surface for the base portion can be inscribed into the outline of the sheet metal plate. The long sides of the rectangular base portion can be realized, in particular separated out from a metal sheet, according to a length specification for the carcass rail. The rectangular base portion is separated out from a metal sheet with a tongue-shaped projection, the tongue-shaped projection standing out in a free standing manner from a side edge in particular on a long side of the rectangular base portion. 
         [0024]    The sheet metal plate can be separated out from a metal sheet with a, for example, L-shaped outline. In order to produce a carcass rail with several, in particular two free-standing mounting straps, the sheet metal plate can be separated out from a metal sheet with a, for example, F-shaped outline. A carcass rail with more than two mounting straps is separated out from a metal sheet with a corresponding number of projections which protrude laterally in a tongue-shaped manner on one side of a rectangular basic form. 
         [0025]    A particularly preferred design of the invention provides that between the side projections, which protrude on a side edge of a rectangle which is inscribed into the outline of a first sheet metal plate for a first carcass rail, intermediate spaces are realized into which at least part of the tongue-shaped projections of a second sheet metal plate can extend for a second carcass rail. As a result, during the separating out process the separating forms of two sheet metal plates are arranged in such a manner that the outlines of the sheet metal plates lie rotated with respect to one another by an angle of 180′ in a plane of the metal sheet in order to reduce material scrap with a material-saving design of the carcass rail. 
         [0026]    The separating form can be realized on a tool of a, for example, stamping press. In addition, the separating form can be predefined, in particular programmed, as a tool path of a cutting tool, for example of an X-ray head of a laser cutting device. 
         [0027]    In order to develop the production of the carcass rail according to the invention in a rational manner, out of one metal sheet two interlocking sheet metal plates as rough forms for two carcass rails are separated out in particular in one production step. Outlines of two sheet metal plates are preferably arranged in such a manner that on the separating form at least one common separating line is realized between both sheet metal plates, on which separating line the outlines of the two sheet metal plates cover one another. The two sheet metal plates are preferably separated from one another at a continuous common separating line. 
         [0028]    For separating out, the sheet metal plate can be, for example, punched from a metal sheet or can be cut out by laser cutters and, in particular, milling machines. 
         [0029]    In this case, the sheet metal plate is preferably produced from steel plate. 
         [0030]    For comparatively simple production, the sheet metal plate is separated out of a metal sheet with boundary edges arranged at right angles with respect to one another. Protruding and pulled-in corners are preferably rounded on the outline of the sheet metal plate in order to reduce the risk of cracking and rupture on the carcass rail under load. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0031]    The invention is explained below by way of several exemplary embodiments which are described by way of drawings. The exemplary embodiments are shown not true to scale in the drawings. 
           [0032]      FIG. 1  shows a schematic side view of an item of furniture according to the invention; 
           [0033]      FIG. 2  shows a schematic view in perspective of a carcass rail according to the invention from a side, rear viewpoint; 
           [0034]      FIG. 3  shows a schematic front view of a cross section at right angles to a longitudinal axis of a carcass rail according to the invention in the region of the mounting portion; 
           [0035]      FIG. 4   a  shows a schematic front view of a cross section at right angles to a longitudinal axis of a guiding apparatus according to the invention; 
           [0036]      FIG. 4   b  shows a schematic front view of a cross section at right angles to a longitudinal axis of a guiding apparatus according to the invention; 
           [0037]      FIG. 5  shows a schematic view in perspective of a carcass rail according to the invention; 
           [0038]      FIG. 6  shows a schematic top view of a metal sheet with two sheet metal plates; 
           [0039]      FIG. 7  shows a schematic top view of a metal sheet with two sheet metal plates; 
           [0040]      FIG. 8  shows a schematic view in perspective of a carcass rail according to the invention; and 
           [0041]      FIG. 9  shows a schematic top view of two sheet metal plates. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0042]      FIG. 1  shows a design of an item of furniture  1  according to the invention which is provided with two movable furniture parts (drawers  3 ). The drawers  3  are mounted on a furniture carcass  2  with guiding units  4  according to the invention and are movably mounted for pulling-out and pushing-in by means of the guiding units  4 . The furniture carcass  2  is shown in  FIG. 1  without a side wall on the front side in order to show the arrangement of the drawers  3  and of the guiding units  4  in the furniture carcass  2 . Each drawer  3  is mounted on the furniture carcass  2  with two guiding units  4 , in each case a non-visible guiding unit being mounted on a side wall  39 . 
         [0043]    Each guiding unit  4  includes a carcass rail  5  according to the invention, an intermediate rail  6  as well as a load rail  7 . The load rail  7  can be mounted on the bottom or side of the drawer  3 . The carcass rail  5  is realized for mounting on a right-hand side wall (not shown). In this case, the carcass rail, in the mounted state, abuts against the side wall by way of a side profile portion  8  and a mounting strap  12 , the mounting strap  12  being realized with mounting means for assembly. 
         [0044]      FIG. 2  shows an exemplary embodiment for a carcass rail  5  according to the invention which can be inserted, for example, on the item of furniture  1  shown in  FIG. 1 . A cross section of the carcass rail  5  is shown in  FIG. 3 . A guiding apparatus, in particular a cross section of a left-hand guiding unit  4 —a right-hand guiding unit mirrored on a perpendicular plane is not shown—is shown with an intermediate rail  6 , a load rail  7  and rolling element cages  16  arranged between the rails  5 ,  6 ,  7  in  FIG. 4   a.    
         [0045]    The carcass rail  5  is preferably produced from a metal sheet, preferably sheet steel. The carcass rail  5  has several profile portions  8 ,  9 ,  10  and  11  which can all be realized, for example, over an overall length L of the carcass rail in the longitudinal direction of a front boundary edge  26  as far as up to a rear boundary edge  27 . The profile portions  8 ,  9 ,  10 ,  11  are continuously connected together on bending edges  17 ,  18  and  19  and are bent off with respect to one another, in particular at right angles. The bending edges  17 ,  18  and  19  extend preferably parallel to a longitudinal axis of the carcass rail  5 . Of the bending edges at least one extends preferably at least over the overall length L of the carcass rail. Because the bending edges  17 ,  18  and  19  provide a considerable contribution to strength and sturdiness, it is preferred when the majority of them and in particular all of them are realized extending at least over a large part of the overall length L of the carcass rail  5 . In the design shown, all the bending edges  17 ,  18 ,  19  and the profile portions  8 ,  9 ,  10 ,  11  extend from a front boundary edge  26  as far as up to a rear boundary edge  27 . 
         [0046]    The side profile portion  8  is provided for the purpose of abutting against an even surface of a side wall  39  once the carcass rail  5  has been mounted in the furniture carcass  2 . The side profile portion  8  is connected to a center profile portion  9  at right angles by means of the bending edge  17 . The center profile portion  9  and the profile portion  10  are connected together by means of a further bending edge  18 . The center profile portion  9  is provided for the purpose of supporting the profile portions  10  and  11  and for keeping them at a horizontal spacing, which is predefined by the spacing between the bending edges  17  and  18 , from the side profile portion  8  and, after assembly, from a side wall  39  of a furniture carcass  2 . 
         [0047]    The profile portion  10  forms together with the profile portion  11   a  region of the carcass rail  5  which is provided for a displaceable bearing arrangement of an intermediate rail  6  and a pull-out rail (load rail  7 ). Surface regions  11   a ,  11   b  on the profile portion  11  and where applicable also surface regions  10   a ,  10   b  on the profile portion  10  are preferably provided as running surfaces for the roller element cages  16 , in particular for roller elements includes therein (not shown) and can be processed for this purpose, for example, smoothed or, for example, provided with a thread (not shown). 
         [0048]    A mounting strap  12  is realized on the side profile portion  8  in a front part portion C of the carcass rail  5  which reaches to the front boundary edge  26 . The mounting strap  12  is realized from a metal sheet portion which is connected continuously and integrally to the side profile portion  8  and projects over a top boundary edge  24  of the side profile portion  8  and, in this case, extends as far as up to a top edge  28  of the mounting strap  12 . In this case, the mounting strap  12  is free-standing, it being defined in the direction of the longitudinal axis of the carcass rail by an upwardly-projecting piece of the front boundary edge  26  of the carcass rail and laterally by a boundary edge  29  which connects the top boundary edge  28  of the mounting strap  12  with the top boundary edge  24  of the side profile portion  8 . 
         [0049]    Two bends  22  and  23 , which are realized as offset steps which extend in opposite directions, are realized on the mounting strap  12  parallel to the longitudinal axis of the carcass rail. As a result, the mounting strap is arranged offset inwardly toward the profile portion  10  in the region of the mounting means  15  by a spacing in the order of magnitude of a material thickness, in particular plate thickness, the mounting strap  12  being arranged in the region of the mounting means  15  plane-parallel to the first profile portion  8 . When the carcass rail is mounted, edges of the step-shaped bends  22  and  24  abut in all circumstances against an even mounting region (not shown) of the furniture carcass  2 . Through corresponding strong fastening of mounting elements, in particular screws, the mounting strap can be, in particular, elastically sagged in the region of the mounting means, for example the holes  15 , as a result of which fastening forces are initially transmittable only by means of pressing on the step-shaped bends  22  and  23  and, where applicable, also by the profile portion of the carcass rail  5  abutting onto a side wall  39  of a furniture carcass  2 . In the case of comparatively strong loads on the carcass rail  5 , the fastening of the carcass rail  5  with the furniture carcass  2  as a result can be somewhat flexible in order, for example, to avoid a break-out of fastening means such as, for example, a screw (not shown) or, for example, a dowel (not shown). In addition, the mounting strap  12  is reinforced by the bends  22  and  23  in such manner that a comparatively favorable distribution of mounting and carrying forces onto the mounting strap  12  and onto the first profile portion  8  is achievable. 
         [0050]    Because comparatively high loads can occur in the front part portion C of the carcass rail  5 —in particular when, for example, the drawer  3  is pulled-out—the connection of the mounting strap  12  and of the first profile portion  8  to the center profile portion  9  is provided with a channel-shaped arch  13 , by means of which the connection between the profile portions over the bending edge is reinforced. As a result, increased loadability of the carcass rail, in particular in the region of the bending edge  17  can be achieved in a advantageous manner in order to prevent or at least to reduce the bending edge bending under admissible loads. 
         [0051]    The mounting strap has mounting means in the form of several holes  15  which are provided for mounting with, for example, screws and, for example, dowels. In this case, mounting means can also be realized in the form of engagements for, for example, fastening hooks and the like. Deviating from the design shown here, the mounting means can also include, for example, a hook which is punched out on the mounting strap. 
         [0052]    The profile portion  8  extends over a large part of the length of the carcass rail  5  up to a height A, whilst the mounting strap  12  projects beyond the height A as far as up to the top boundary edge  28 . As can be seen particularly clearly in  FIGS. 3 and 4   a , as a result the mounting means  15  of the mounting strap  12  are arranged advantageously above the profile portions  10  and  11 , as a result of which the mounting means  15  are arranged so as to be comparatively easy to see during mounting of the carcass rail  5  on the furniture carcass  2  and so as to be easily reachable for a tool (not shown). When the mounting strap  12  is also arranged protruding beyond a height B and is provided with at least part of the mounting means  15  above the height B, a guiding unit  4  assembled with all the rails  5 ,  6  and  7  can also be mounted in the furniture carcass  2  by way of the carcass rail  5  with comparatively little expenditure. In the embodiment shown in  FIG. 4   a , an upper portion of the side profile portion  8  connects to the mounting strap via bend  22 . In another embodiment of the carcass rail according to the invention, the mounting strap  12  is connected to center profile portion  9  on edge  20  and side portion profile  8  is positioned between the mounting strap  12  and center profile portion  9  on edge  21 , as shown in  FIG. 4   b . In this embodiment, at least one of side profile portion  8  and mounting strap  12  can be continuously connected to center profile portion  9 . The mounting strap  12  also extends above the side profile portion so that at least a part of the mounting means is above the height B, as shown in  FIG. 4   b.    
         [0053]    On account of the front arrangement on the front boundary edge  26 , the mounting strap is provided in particular for receiving carrying forces which act on the front rail portion, in particular the part portion C. To support the carcass rail in a region in the vicinity of the rear boundary edge  27 , a recess  14 , which is adapted, for example, to a mounting adapter (not shown) which is provided for mounting on one of a rear region of a furniture carcass  2 , a rear wall and, a cross strip  38 , is realized on the center profile portion  9  according to  FIG. 2 . The recess  14  is realized on the center profile portion  9  as a rectangular slot which extends in the longitudinal direction of the carcass rail  5  and is open on the rear boundary edge  27 . As a result, the profile portion  9  is guidable at the recess  14  in correspondingly adapted grooves (not shown) of, for example, a mounting adapter, by way of which the rear end of the carcass rail can be mounted, in particular, in a floating manner. Because the part of the carcass rail is arranged in the majority of cases at a position in the furniture carcass  2  which can hardly be seen or can absolutely not be seen, mounting with, for example, movement play cannot create an unfavorable visual impression. Consequently, the rear rail region of the carcass rail in the design shown can be utilized advantageously for the sturdy and stress-free mounting of the carcass rail  5 . In addition, with regard to mounting the carcass rail is consequently relatively narrow only in the front region, whilst a rear supporting means can be adapted in a variable manner to the conditions, in particular to the mounting possibilities of an item of furniture  1 . 
         [0054]      FIG. 5  shows a third exemplary embodiment for a carcass rail  5  according to the invention. The carcass rail  5  provides a simplified design of the design shown in  FIGS. 2 ,  3  and  4   a , all structural features of the carcass rail  5  also being present in the exemplary embodiment in  FIG. 2  and being already described in this connection. 
         [0055]    By way of the carcass rail  5  which is shown in  FIG. 5 , the production thereof will be described below. To this end,  FIG. 6  shows a metal sheet  30  on which boundary edges  24 ,  25 ,  26 ,  27 , and  28  of two outlines of two sheet metal plates  31  and  32  are drawn. Consequently, the boundary edges  24 ,  25 ,  26 ,  27  and  28  on the metal sheet  30  in  FIG. 6  represent a metal sheet development of two carcass rails  5 . 
         [0056]    The boundary edges  24 ,  25 ,  26 ,  27 ,  28  of the two sheet metal plates are preferably arranged in such a manner that in particular between the two sheet metal plates  31  and  32  no region of the metal sheet  30  remains unutilized. Consequently, the L-shaped outlines of the two sheet metal plates  31  and  32  are arranged rotated with respect to one another by 180° in a plane parallel to the metal sheet. In this case, the two boundary edges  24  of the two metal sheets  31  and  32  are moved to coincide with one another. In addition, in each case the boundary edge  29  of the one and the boundary edge  27  of the other of the sheet metal plates  31  and  32  are arranged covering one another. As a result, a closed, rectangular surface region, in which the two sheet metal plates  31 ,  32  contact one another with no intermediate space and consequently advantageously without any material scrap, is defined on the metal sheet  30  by the boundary edges  25 ,  26  and  28  of two sheet metal plates  31  and  32  together. 
         [0057]    The two sheet metal plates  31  and  32  are separated out from the metal sheet  30 . In this case, during the course of separating the sheet metal plates  31 ,  32  out of the metal sheet, mounting means, in particular in the form of holes  15 , can also be realized out of a sheet metal portion of the sheet metal plates  31  and  32  which is provided as a mounting strap  12 . 
         [0058]    For this purpose, the sheet metal plates  31  and  32  can be, for example, punched or cut out of the metal sheet  30  using one of a milling machine (not shown) and a laser beam (not shown). For this purpose, for example, a punch (not shown) is realized in such a manner that consequently the two sheet metal plates  31  and  32 , which have been rotated with respect to one another about 180° and abut against one another, are punched out together from the metal sheet  30  in particular in one operating cycle of a punching apparatus (not shown), the two sheet metal plates  31  and  32  preferably being separated from one another at the same time. 
         [0059]    Furthermore, the positions of bending edges  17 ,  18  and  19  are recorded on the metal sheet  30  as interrupted lines. Once the two sheet metal plates  31  and  32  have been separated out and, where applicable, subsequently detached from one another, the sheet metal plates  31 ,  32  are bent at the bending edges  17 ,  18  and  19 . In this case, the bending edges  17 ,  18 ,  19  can be realized by press braking and, for example, by rolling, in particular cold rolling. In this case, the mounting strap  12  is bent off from a profile portion  9  in the case of each of the metal sheet parts. In particular, the mounting strap  12  is bent off from the profile portion  9  together with a first profile portion  8 , as a result of which the mounting strap  12  is realized so as to be protruding upward and standing freely from a height A of a top boundary edge  24  of the profile portion  8 . 
         [0060]      FIG. 7  shows a metal sheet  30  with sheet metal plates  31  and  32  for a fourth exemplary design of a carcass rail  5  according to the invention. The sheet metal plates  31  and  32  differ from the designs shown in  FIG. 6  in that, in the case of the two sheet metal plates  31  and  32 , on a side profile portion  8  close to a first sheet tongue on the front boundary edge  26 , which is realized to form a mounting strap  12 , in each case a second sheet tongue is realized for a second mounting strap  34 . In this case, the sheet tongues for the mounting straps  12  and  34  are arranged on the sheet metal plates  31  and  32  in such a manner that the sheet metal plates  31  and  32 , which are rotated with respect to one another by 180°, can be arranged interlocking with the sheet tongues. In this case, remaining regions  33  of the metal sheet  30  can remain unutilized in order to form, for example, the two mounting straps  12  and  34  in a comparatively space-saving manner. 
         [0061]    The sheet tongues for the mounting straps  12  and  34  are connected homogeneously to the profile portion. Once the sheet metal plates  31  and  32  have been separated off, the mounting straps  12  and  34  are bent off together with the profile portion  8  at a bending edge  17  of a profile portion  9 . 
         [0062]      FIGS. 8 and 9  show a fifth exemplary embodiment of the invention. A carcass rail  5  according to the invention also has profile portions  10  and  11  which are bent off at bending edges  18  and  19  in a similar manner as realized in the exemplary embodiments described beforehand. 
         [0063]    The center profile portion  9  is widened in a part portion C, as a result of which the profile portion is defined on one side of two separated side profile portions  8  and  40 . In this case, the side profile portion  40  is connected to the center profile portion  9  by means of a bending edge  41 . A mounting strap  12  with mounting means in the form of several holes  15  is realized on the side profile portion  8  above a height A. The height A preferably lies above the profile portions  10  and  11 . The side profile portion  8  and the mounting strap  12  are bent off together from the center profile portion  9  at a bending edge  17 , as a result of which the mounting strap is moved into a free-standing position and is connected integrally to the remaining carcass rail  5 . Through the widening of the center profile portion  9  in the part portion C, the profile portion is realized in portions as a free-standing supporting arm, by way of which the rail region with the side profile portion  40  can be mounted, for example, at a predetermined spacing from a, for example, side wall  39  of a furniture carcass  2 . 
         [0064]      FIG. 9  shows two sheet metal plates  31  and  32  which are arranged abutting against one another in such a manner that together they form an outline of a rectangular surface. In contrast to the above-described designs, the sheet metal plates are cut in order to realize boundary edges  37   a ,  37   b  and  37   c  on each of the sheet metal plates. As a result, the two bending edges  17  and  41 , which are offset with respect to one another and on which the side profile portion  8  with the mounting strap  12  and the side profile portion  40  can be bent off separately from one another, can be realized on the center-profile portion  9 . 
       LIST OF REFERENCES 
       [0000]    
       
           1  Item of furniture 
           2  Furniture carcass 
           3  Drawer 
           4  Guiding unit 
           5  Carcass rail 
           6  Intermediate rail 
           7  Load rail 
           8  Side Profile portion 
           9  Center Profile portion 
           10  Profile portion 
           10   a  Surface region 
           10   b  Surface region 
           11  Profile portion 
           11   a  Surface region 
           11   b  Surface region 
           12  Mounting strap 
           13  Arch 
           14  Recess 
           15  Hole (mounting means) 
           16  Rolling element cage 
           17  Bending edge 
           18  Bending edge 
           19  Bending edge 
           20  Edge 
           21  Edge 
           22  Bend 
           23  Bend 
           24  Top Boundary edge 
           25  Boundary edge 
           26  Front Boundary edge 
           27  Rear Boundary edge 
           28  Top Boundary edge (on mounting strap) 
           29  Boundary edge (on mounting strap) 
           30  Metal sheet 
           31  Sheet metal plate (blank) 
           32  Sheet metal plate (blank) 
           33  Remaining region 
           34  Second Mounting strap 
           35  Bending edge 
           36  Boundary edge 
           37   a  Boundary edge 
           37   b  Boundary edge 
           37   c  Boundary edge 
           38  Cross strip 
           39  Side wall 
           40  Side Profile portion 
           41  Bending edge