Abstract:
A pull-out slide is used for fastening a drawer sliding bottom on a side wall of a stationary furniture body. The set has a carrying rail which can be connected with a holding part. The holding part can be fixedly connected with a furniture body. In addition, the set includes at least one slide rail which can slide with respect to the carrying rail, and which can be connected with the drawer sliding bottom. The carrying rail can be locked by a releasable locking mechanism on the holding part, in order to restrict movement in the direction of the carrying rail. The locking mechanism can lock the carrying rail onto the holding part, either in a first direction and/or a second direction, each direction being perpendicular to the carrying rail. Unlocking of the locking mechanism permits removal of the carrying rail and drawer sliding bottom as a unit from the holding part. The pull-out slide set with the sliding bottom is easily and rapidly mounted and demounted.

Description:
BACKGROUND AND SUMMARY OF THE INVENTION 
     The invention relates to a pull-out side set used for fastening a drawer or sliding bottom on a side wall of a stationary furniture body. 
     Filed contemporaneously herewith are six United States patent applications, commonly assigned to Paul Hettich GmbH &amp; Co.: 
     
       
         
               
               
               
             
           
               
                   
               
               
                 INVENTOR(S) 
                 TITLE 
                 ATTY DOCKET 
               
               
                   
               
             
             
               
                 Müterthies, Rüter, et al. 
                 Fastening Arrangement 
                 824/36770 
               
               
                 Müterthies, Rüter, et al. 
                 Fastening Arrangement 
                 824/36771 
               
               
                 Müterthies, Rüter, et al. 
                 Mounting Unit 
                 824/36772 
               
               
                 Müterthies, Rüter, et al. 
                 Fastening Arrangement 
                 824/36773 
               
               
                 Müterthies, Rüter, et al. 
                 Partitioning System 
                 824/36775 
               
               
                 Müterthies, Rüter, et al. 
                 Fastening Arrangement 
                 824/36785 
               
               
                   
               
             
          
         
       
     
     The claims, drawings and specification of each of the foregoing applications is hereby specifically incorporated by reference into this specification as if set forth verbatim herein. 
     During the life of a piece of furniture having a pull-out slide set, it is frequently necessary to disassemble the piece of furniture into individual components which are more portable, and to reassemble the components at a different site. When a piece of furniture has several drawers, it is expedient for the disassembly to take place as effectively as possible without affecting the stability of the reassembled piece of furniture. 
     German Patent Document DE 83 33 251 U1 shows a pull-out slide set for drawers wherein the drawer can be hung into the pull-out rails of the pull-out slide set mounted in the furniture body and can be removed again. In order to facilitate the installation and removal of the drawer, a locking device is provided on each pull-out slide set to hold the pull-out rail on the carrying rail. The carrying rail is screwed to the furniture body, while the pull-out rail, displaceably carried on the carrying rail, is detachably connected with a drawer. The locking device is disposed on the pull-out rail and can lock downward into a recess in the carrying rail. Thus, the drawer can be removed from the furniture body while the pull-out slide set remains in the furniture body. 
     This pull-out slide set has disadvantages. For example, the heavy pull-out slide set, which is usually made of sheet metal, remains in the furniture body which, compared with the drawer, is very heavy. The disassembly of the piece of furniture into individual components therefore results in an extremely uneven weight distribution of the individual components. Furthermore, the known locking device is not secure because the lock can easily be unintentionally unlocked. When the lock is unintentionally released, the pull-out rail can slide out of the furniture body and injure persons or damage objects. Because the furniture body is unwieldy and heavy, such an unintentional unlocking of the locking device can easily occur during the transport of the furniture body. 
     The present invention provides a pull-out slide set which is easy to mount, and permits the disassembly of a piece of furniture into only a few individual components with a relatively even weight distribution. In addition, the pull-out slide set protects against faulty operations, and can be manufactured at reasonable cost. 
     According to the invention, a pull-out slide set for fastening a drawer sliding bottom on a side wall of a stationary furniture body has a carrying rail which can be connected with a holding part fixedly connected with a furniture body and at least one slide rail which is displaceably disposed with respect to the carrying rail and connected with a drawer sliding bottom. The carrying rail has a releasable locking mechanism on the holding part to retain it on the carrying rail. This construction permits a simple mounting and demounting of the pull-out slide set and allows removal of the pull-out slide set while only the holding part remains connected with the furniture body. The weight of a piece of furniture is thus more evenly distributed to the individual components, so that the pull-out slide set present a lower safety risk because of the smaller size and the easier handling. 
     According to a preferred embodiment of the invention the locking mechanism secures the carrying rail on the holding part in a first direction perpendicular to the carrying rail. This construction ensures a secure hold of the pull-out slide set also in a loading direction. Preferably, the carrying rail can be locked at the holding part using a second lock mounted in an inclined manner with respect to the first lock and perpendicular to the carrying rail. As a result, the drawer sliding bottom is securely held in all possible horizontal and vertical directions. 
     A locking mechanism is obtained which is easily produced at a reasonable cost if this locking mechanism has a displaceable locking element which engages the holding part. In this case, the locking element has devices for locking the holding part in the two directions mentioned earlier. 
     When unlocked, each slide rail is held on the carrying rail so that, during the removal of the pull-out slide set from the furniture body, movement of the slide rail or rails is essentially prevented. In this context, a slight movement of the slide rails up to approximately 4 cm is still called “essentially fixed” because a movement in this order is still relatively safe. However, a maximal play of the slide rail(s) of less than 1 cm is desirable. 
     In another embodiment of the invention, a locking element with a catch device which engages a catch element is mounted on the drawer sliding bottom and the locking element can be moved into a released position by means of the catch element. This construction ensures that the locking element is not accidently deactivated, but can be unlocked only by the intentional operation of a catch element. 
     The catch element is movable. In a first position, it does not engage the locking element and in a second position, it interlocks with the locking element. In order to ease the mounting of the catch element, it is displaceably received on a guiding part and can be fixed in the first and second position. As a result, the fitter can hear and feel whether the desired position of the catch element has been reached. 
     An easily producible pull-out slide set can be obtained when the locking element is displaceable on a carrying rail, and a guiding element is mounted on the carrying rail. In this case, the guiding element can be fitted onto and held on the carrying rail by a catch device. 
     If the above-mentioned locking element has at least two locking tongues which at least partially reach around the holding part in the locked condition, the desired locking can be achieved in several directions. The locking element element is displaceably arranged along a recess formed on the carrying rail in order to guide the locking element. 
     The invention can be produced at reasonable cost if the carrying rail and the provided slide rails are made of metal and the components of the locking mechanism are made of plastic. 
     According to the invention, a drawer is also provided which has a sliding bottom which is held on each side by a pull-out slide, device, the drawer including a front panel, side walls and a rear wall. The drawer also has two pull-out slide sets. 
     Other objects, advantages and novel features of the present invention will become apparent from the following detailed description of the invention when considered in conjunction with the accompanying drawings. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 is a perspective view of a pull-out slide set according to the invention; 
     FIG. 2 is an enlarged view of a part of the pull-out slide set as in FIG. 1; 
     FIG. 3 is a lateral view of the front of the pull-out slide set according to FIG. 1, shown in the locked position; 
     FIG. 4 is a lateral view of the forward part of the pull-out slide set shown in FIG. 1 in the unlocked and locked position; 
     FIG. 5 is a sectional view of the back of the pull-out slide set according to FIG. 1; 
     FIGS. 6A to  6 D are several views of the locking element of the pull-out slide set; 
     FIGS. 7A to  7 E are several views of the catch element of the pull-out slide set; 
     FIGS. 8A to  8 D are several views of the guiding element of the pull-out slide set; 
     FIG. 9 is a bottom view of the mounted pull-out slide set of FIG. 1, shown with the drawer closed; 
     FIG. 10 is a bottom view of the pull-out slide set, shown with the drawer open; 
     FIG. 11 is a bottom view of the pull-out slide set of FIG. 9 while the catch element is adjusted; 
     FIG. 12 is a bottom view of the pull-out slide set of FIG. 9 in the removable position; 
     FIG. 13 is a bottom view of the pull-out slide set of FIG. 9 in the inserted position; 
     FIG. 14 is a bottom view of the pull-out slide set of FIG. 9 with an unlocked catch device; 
     FIG. 15 is a bottom view of the pull-out slide set of FIG. 9 with a pushed-in catch device; 
     FIG. 16 is a bottom view of the pull-out slide set of FIG. 9 in the unlocked position; and 
     FIG. 17 is a simplified cross-sectional view of the pull-out slide set of FIG.  1 . 
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The pull-out slide set illustrated in FIG. 1 is used for fastening a sliding bottom  1  of a drawer on a furniture body (not shown) to a drawer slide rail  2 . Connection elements  3 , which are partially metal, are fastened on each side of the sliding bottom  1  and on a drawer slide rail  40  (see FIG.  10 ). A carrying rail  9  is connected with a metal holding part  2 , which is screwed into a side wall of a furniture body. As shown, two slide rails  39  and  40  are arranged to enable sliding bottom  1  to be pulled beyond the front face of the furniture body. It is also possible to provide only one slide rail  30  for a shorter displacement path. 
     The sliding bottom  1  is held on both sides by three connection elements  3  respectively which partially reach under the sliding bottom  1 . Drawer side wall elements  4  are mounted on the connection elements  3  using catch devices or other holding devices, which rest on the sliding bottom  1  in the direction of the interior side. A rear wall  8  is screwed to the sliding bottom  1 , and is locked on both sides with one connection element  3 . A front panel  38  is fastened to two forward connection elements  3  (see FIG.  10 ). 
     A guiding part  5  is screwed into the underside of sliding bottom  1  and engages a pin provided at two ends into corresponding openings of the sliding bottom  1  (see FIG.  2 ). The guide part  5  is bent, with a center section bent toward the center of the sliding bottom  1 . A mounting of the center section which is directed toward the outside is not possible because otherwise the center section would strike against the holding part  2 . A slot  7  is provided in the guide part  5  and guiding head  25  of a catch element  6  is accommodated in the slot  7 . 
     A carrying rail is releasably fastened in the holding part  2 . In the rearward part of the holding part  2 , a projecting nose  14  is constructed for this purpose, into which nose  14  the rearward end of the carrying rail  9  can slide (FIG.  5 ). The carrying rail  9  is supported on the bottom of the holding part  2  and the nose  14 , in the rearward area in the upward as well as in the downward direction. Indentations and projections are provided on the holding part  2  which guide the carrying rail  9  in the lateral direction in order to slide the carrying rail  9  on the holding part  2  to the correct position. In addition, a stop is shaped into the holding part  2  which limits the slide-in path. The holding part  2  has a diagonally upward bent edge facing the sliding bottom. Another diagonally extending edge of the pentagonal carrying rail  9  rests against the diagonally upward bent edge. 
     FIG. 17 is a cross-sectional view of the pull-out slide showing slide rails  39  and  40  and carrying rail  9 . Three cylindrical roller bodies  41  are situated between the rails  9 ,  39 ,  40  so that the slide rails  39  and  40  are movably guided on the carrying rail  9 , and are supported perpendicularly to the moving direction. The bodies are shown between rails  40  and  39  in FIG.  17  and not between rails  39  and  9 . On the slide rail  40 , the metal section of the connection element  3 , is fastened on the side rail  40  at X. 
     In the forward area of the holding part  2 , a locking mechanism secures the carrying rail  9  to the holding part  2  (see FIG.  2 ). The locking mechanism comprises a locking element  10  movable on the carrying rail  9 . A guiding element  31  is fitted onto the carrying rail  9  and forms a guiding channel with the carrying rail  9 . 
     The locking element  10  is illustrated in FIGS. 6A to  6 D. A center web  17  connects two end section of the locking element  10 . The center web has a widening  22  which interacts with the guiding channel on the guiding element  31  and provides an easy locking, or at least inhibits displacement. The section facing the front side of the sliding bottom  1  has a catch projection  19  with an inclined surface, and is flexibly held at the center web  17 . On this side, a holding nose  23  is also situated which is molded to an end section  20  also having a rib-shaped stop  21 . A gap is configured between the center web  17  and the holding nose  23  to receive a portion of the end edge of the holding part  2 . The bevelled shape of the holding nose  23  guides the edge end into the gap. 
     On the opposite side of the center web  17 , a guiding foot  18  is provided which, in the installed condition, can be displaced along a recess provided in the carrying rail  9 , the carrying rail  9  engaging in the approximately V-shaped area of the guiding foot  18 . In the locked position of the locking element  10 , a projection of the carrying rail  9  engages the outer lower end of the guiding foot  18 , which projection supports the locking element  10  (FIG.  2 ). A locking tongue  11  is molded to the center web  17  and reaches through an opening  15  formed in the carrying rail  9  and, at a recess of the holding part  2 , can partially reach around this holding part  2 . The locking tongue  11  has a stepped shape because, in the top view, the opening  15  and the recess of the holding part  2  are slightly offset from one another. In this case, the recess and the opening  15  are each constructed at the diagonally upward-extending edge of the holding part  2  or carrying rail  9 , so that the locking tongue  11  reaches around the carrying rail  9  and the holding part  2  at the respective edges and locks them in a direction perpendicular to the inclined surface. In contrast, the holding nose  23  is applied to the horizontal curve of an indentation on the holding part  2 , so that, as a result of the holding nose, a locking in the vertical direction is ensured. 
     FIGS. 7A to  7 E are several views of the catch element  6 . The catch element essentially has a T-shape and, on the bottom of the T, has a downward-projecting grip element  24  which has a lateral projection. By use of the grip element  24 , the catch element  6  can be manually displaced in the guide element  5 . At a center section of the catch element  6 , a guide head  25  is provided which is engaged in the slot  7  of the guide element  5 . The guide head  25  and the slot  7  are arranged to be offset with respect to the center axis of the catch element  6 , so that the installation of the catch element can take place only in the correctly aligned position. In addition to the guide head  25 , a slot  26  and a projection  27  are provided. By means of the slot  26 , the projection  27  is elastically held in the lateral direction, so that, during a displacement, the catch element  6  can be locked in two end positions in the guide element  5 , a recess for the projection  27  being formed in the guide element  5  for this purpose. 
     The catch element  6  also has a left catch projection  28  and a right catch projection  30 . The two catch projections  28  and  30  have a symmetrical construction, so that the catch element can be used on the right and the left side of the sliding bottom  2 . The catch projections  28  and  30  each have catch slopes which, with respect to the shape and the inclination, are constructed such that they can interact with the catch projections  19  on the locking element  10 . In addition, a second grip element  29  is constructed at the catch element  6 . 
     FIGS. 8A to  8 D are different views of the guide element  31 . The guide element  31  has a center guide channel  32 , in which the center web  17  of the locking element  10  can be displaceably received. On the guide channel  32 , inward-projecting ribs are provided so that, in the mounted condition, there is at least a partial reaching around on all sides on the locking element  10 . On both sides of the guide channel  32 , receiving devices  33  and  34  are provided in which one end respectively of a diagonally extending edge of the carrying rail  9  can be received. In the receiving device  34 , a projection  36  is constructed which can engage in a corresponding recess at the carrying rail  9  in order to lock the guide element  31  on the carrying rail  9 . In addition, stops  37  are constructed on the guide element  31  which bound a movement of the catch element  65  during a locking operation described above. 
     The locking mechanism will be described in the following. In the position illustrated in FIG. 3, the carrying rail  9  is fixedly locked with the holding part  2 . For this purpose, the locking tongue  11  and the holding nose  23  are applied to the exterior side of the holding part  2  and thus clamp the carrying rail  9  against the holding part  2 . Because the locking tongue  11  and the holding nose  23  are applied to differently sloped surfaces, the carrying rail  9  is secured perpendicularly to its rail axis in several directions. In the direction of the rail axis, an upward-projecting stop is impressed at the holding part  2  which limits the movement of the carrying rail  9  in the longitudinal direction with minimal play. 
     For opening the locking mechanism, while the drawer is open, the catch element  6  is moved with the catch projections  28  and  30  toward the locking element  10  until an inclined surface of a catch projection  28  or  30 , during the subsequent closing of the drawer, slides on the inclined surface of the catch projections  19  along the locking element  10  and, as a result of the elasticity, is pressed away in the upward direction. Subsequently, the catch projection  28  and engages behind the catch projection  19  at the locking element  10 . The catch element  6  is now fixedly connected with the locking element  10 . In the course of the described engagement, the catch projection  18  or  30  has pulled the locking element  10  by way of the catch projection  19  by an extent toward the outside and thus releases the locking mechanism (FIG.  4 ). In this position, the holding nose  23  and the locking tongue  11  will no longer reach around the holding part  2 , so that the carrying rail  9  can be lifted and can be removed over the stop on the holding part toward the front. 
     The individual steps for removing and inserting the drawer will be described in greater detail below. 
     In the installed condition, the drawer with the sliding bottom  1  is in the position illustrated in FIG.  9 . The front panel  38  rests against the stop  21  of the locking element  10  and the catch element  6  is received in the guide element  5  and hangs freely on the underside of the sliding bottom. 
     For the removal of the drawer, this drawer is first pulled out of the furniture body not illustrated in FIG.  10 . In FIG. 10, the pull-out slide with the slide rails  30  and  40  is schematically illustrated only on the right side. However, the slide rails  39  and  40  are always situated on both sides next to the sliding bottom  1 , even if this is not shown in FIGS. 9 to  16  for the purpose of providing clarity. 
     In order to release the locking mechanism, as briefly described above, the two catch elements  6  are displaced toward the outside on the underside of the sliding bottom  1  until they lock in their outer position. The catch projections  28  and  30  are situated in the pull-out direction to the right and left locking element (FIG.  11 ). 
     The drawer is then slid in again until the catch projections  28  and  30  each lock by means of a catch projection  19  on a locking element  10  (FIG.  12 ), in which case a catching sound is generated which is audible to the fitter. In the course of the engagement, the locking element  10  has experienced a displacement in the longitudinal direction and has released the locking between the holding part  2  and the carrying rail  9 , so that the carrying rail  9  is no longer locked at the holding part  2  by means of the locking element  10 . Then the drawer with the slide rails  39  and  40  is lifted by a small amount and is removed over the stop on the holding part  2  toward the outside. 
     The slide rails  39  and  40  and the carrying rail  9  are fixed on one another by means of the locking mechanism and cannot be moved with respect to one another. In this case, a friction roller, which is not shown and is disposed on the slide rail  39 , stabilizes the fixing which otherwise provides only a uniform movement of the slide rails  39  and  40 . When the drawer is removed, the slide rail  39  or  40  may project beyond the rear wall  8  of the drawer toward the rear. In order to avoid this, the length and the position of the slide rails  39  and  40  may be selected such that, in the locked position of the locking mechanism, they end with the rear wall  8  of the drawer. 
     The inserting of the drawer takes place in a reverse sequence. First, the unit consisting of the drawer and the pull-out slide is inserted and pushed into the furniture body until the carrying rail  9  arrives under the nose  14  and comes to rest against the rearward stop of the holding part  2 , while the carrying rail  9  is placed in the front on the holding part and is blocked by the forward stop on the holding part  2  in the pull-out direction. 
     The drawer is then forcefully pulled to the outside so that the catch connections between the elastic catch projections  28  and  30  with the respective elastic catch projections  19  of the two locking elements  10  are released (FIG.  14 ). 
     Then the catch elements  6  on both sides of the sliding bottom are displaced toward the interior until they lock in their inner position (FIG.  15 ). 
     Subsequently, the drawer with the front panel  38  is pushed into the furniture body, the interior side of the front panel  38  abutting against the stops  21  of the two locking elements  10  (FIG.  16 ). In this case, the locking elements  10  are pressed toward the inside and moved into the locked position, so that the locking tongue  11  and the holding nose  23  reach around the holding part  2  and the carrying rail  9 , causing the carrying rail  9  to be fixedly locked on the holding part  2 . 
     As an alternative, in the position illustrated in FIG. 13, the locking mechanism can also be released in that the catch elements  6  are manually displaced toward the center of the drawer. Then the drawer can simply be closed, in which case the front panel  38  abuts against the stops  21  of the two locking elements  10  and, in the process, displaces the locking elements  10  into the locked position. 
     Although the present invention has been described and illustrated in detail, it is to be clearly understood that the same is by way of illustration and example only, and is not to be taken by way of limitation. The spirit and scope of the present invention are to be limited only by the terms of the appended claims.