Abstract:
The invention is directed to a furniture fitting that is detachably fastened to a furniture part. The fitting comprises a fitting body removably mounted on the furniture part, an expansion sleeve insertible into an opening arranged in the furniture part, and an expansion portion for the expansion sleeve and passing through the fitting body. A peg or bolt is provided for connecting the expansion portion to the expansion sleeve. The expansion portion has a body preferably tapered, at one end, and is articulated, at the opposite end, to a tiltable clamping lever supported by the fitting body. The fitting body includes projections directed towards the expansion portion. The expansion portion abuts a shoulder of each projection.

Description:
BACKGROUND OF THE INVENTION 
     The invention relates to a fitting for detachable fastening to a furniture part. The fitting includes a fitting body abutting the furniture part and at least one dowel-like expansion sleeve which can be inserted into a drilled hole of the furniture part. The expansion sleeve has a casing of which is formed of a plurality of axially offset gripping projections, preferably with a conical tip. The fitting also includes a pin-shaped expansion portion for the expansion sleeve, which expansion portion projects through the fitting body. Arranged on the fitting body away from the furniture part is a clamping portion for the expansion sleeve, which clamping portion is preferably supported on the fitting body. 
     SUMMARY OF THE INVENTION 
     The problem addressed by the invention is to provide a furniture fitting which can be anchored in particularly small drilled holes, i.e. whose dowels or expansion sleeves and expansion portions have a very small diameter. However, the furniture fitting also needs to be held firmly on the furniture part. In particular, the drilled holes are likely to have a diameter of 5 mm, since these have become the unofficial standard in system drilling. 
     The problem addressed by the invention is solved by the expansion portion being held in an axially immovable manner in the fitting body and by the expansion sleeve being axially movable relative to the expansion portion and the fitting body by means of a clamping portion. 
     When the fitting is braced, the wooden material is therefore compressed in the dowel region, thus improving the dowel or expansion sleeve hold in the furniture part. 
     The expansion portion preferably has two radially projecting pegs which project in the expansion sleeve into guide slots which extend, at least in some regions, at an angle to the generatrices of the expansion sleeve. 
     In another embodiment of the invention, the expansion sleeve has two diametrically arranged and inward-projecting pegs which project into grooves or slots of the expansion portion, which grooves or slots extend, at least in some regions, at an angle to the generatrices of the expansion portion. 
     The expansion sleeve is also preferably anchored in the fitting body by means of an anti-torsion device, and the expansion portion can be twisted relative to the expansion sleeve by means of a handle or tool-accommodating portion. 
     According to one embodiment of the invention, the expansion sleeve has, at its extremity facing the fitting body, an outwardly flanged collar by which it is secured in an annular traction portion having two brackets which project through separate slots of the fitting body and which, on the fitting body side further from the furniture part, are articulated on a clamping portion which is preferably in the form of a rocker arm. 
     According to another embodiment of the invention, the expansion portion is inserted from the visible surface of the fitting body through the body and, by compression of the fitting body, is secured therein and has, at its extremity on the fitting body side, a stop which abuts the fitting body on the visible surface side. 
     The expansion sleeve is also preferably anchored in the fitting body by means of an anti-torsion device, and the expansion portion can be twisted relative to the expansion sleeve by means of a handle or tool-accommodating portion. 
     The expansion sleeve is also preferably provided in the casing with openings which pass radially therethrough. 
     The expansion portions are preferably made from a metal, in particular from quenched and tempered steel. The walls of the expansion sleeves can then be kept very thin. Their thickness does not exceed 1 mm and is preferably between 0.7 and 0.8 mm. The expansion sleeve is preferably coated by means of phosphating. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     Various embodiments of the invention are described below with reference to the Figures in the accompanying drawings, in which: 
     FIGS. 1 and 2 are each: a representation of a furniture fitting according to the invention; 
     FIG. 3 is: a representation of a furniture fitting according to the invention, with the parts shown disassembled; 
     FIG. 4 is: a plan view of a fitting according to the invention; 
     FIG. 5 shows: the position of one of the retaining pegs in the guide slot with the handle in the position shown in FIG. 4; 
     FIG. 6 is: a section along the line B—B in FIG. 4; 
     FIG. 6 a  is: an enlarged view of section A in FIG.  6 : 
     FIG. 7 is: a section along the line A—A in FIG. 4; 
     FIG. 7 a  is: a section along the line A in FIG. 7; 
     FIG. 8 is: a plan view of a furniture fitting according to the invention; 
     FIG. 9 shows: the position of the retaining peg in the guide slot with the handle in the position shown in FIG. 8; 
     FIG. 10 is: a section along the line B—B in FIG. 8; 
     FIG. 10 a  is: an enlarged view of section A in FIG. 10; 
     FIG. 11 is: a section along the line A—A in FIG. 8; 
     FIG. 11 a  is: an enlarged view of section A in FIG. 11; 
     FIG. 12 is: a further plan view of a fitting portion according to the invention; 
     FIG. 13 shows: the position of the retaining peg in the guide slot with the handle in the position shown in FIG. 12; 
     FIG. 14 is: a section along with the line B—B in FIG. 12; 
     FIG. 14 a  is: an enlarged view of section A in FIG. 14; 
     FIG. 15 is: a section along the line A—A in FIG. 12; 
     FIG. 15 a  is: an enlarged view of section A in FIG. 12; 
     FIGS. 16 and 17 are each: a representation of a further embodiment of a fitting according to the invention; 
     FIG. 18 is: a representation of the fitting with the parts shown disassembled; 
     FIG. 19 is: a plan view of the fitting according to the invention; 
     FIG. 20 is: a section along the line A—A in FIG. 19; 
     FIG. 20 a  is: an enlarged view of an encircled section in FIG. 20; 
     FIG. 21 is: a section along the line B—B in FIG. 19; 
     FIG. 21 a  is: an enlarged view of an encircled section in FIG. 21; 
     FIG. 22 is: a section along the line A—A in FIG. 19 with the expansion sleeve shown in a spread-apart position; 
     FIG. 22 a  is: an enlarged section of an encircled section in the FIG. 22; 
     FIG. 23 is: a section along the line B—B in FIG. 19 with the expansion sleeve shown in a spread-apart position; 
     FIG. 23 a  is: an enlarged view of an encircled section in FIG. 23; 
     FIG. 24 is: a cross-section through the fitting according to the invention; 
     FIG. 24 a  is: an enlarged view of section A in FIG. 24; 
     FIG. 25 is: a section along the line B—B in FIG. 24; 
     FIG. 25 a  is: an enlarged view of section A in FIG. 25; 
     FIGS. 26 and 27 are each: a representation of a further embodiment of the fitting; 
     FIG. 28 is: a representation of this embodiment of the fitting with the parts shown disassembled; 
     FIG. 29 is: a plan view of this embodiment; 
     FIG. 30 is: a section along the line A—A in FIG. 29; 
     FIG. 30 a  is: an enlarged view of an encircled section in FIG. 30; 
     FIG. 31 is: a plan view of a fitting according to the invention with the clamping lever in the clamping position; 
     FIG. 32 is: a section along the line A—A line in FIG. 31; 
     FIG. 32 a  is: an enlarged section of an encircled section in FIG. 32; 
     FIGS. 33 and 34 are each: a representation of a further embodiment of a fitting according to the invention; 
     FIG. 35 is: a representation of an embodiment of the fitting shown in FIGS. 33 and 34 with the individual parts shown disassembled: 
     FIGS. 36 and 37 are each: a representation of a further embodiment of a fitting according to the invention; 
     FIG. 38 is: a representation of this embodiment with the parts shown disassembled; 
     FIG. 39 is: a plan view of this embodiment of a fitting according to the invention; 
     FIG. 40 is: a section along the line A—A in FIG. 39; 
     FIG. 40 a  is: an enlarged section of an encircled section in FIG. 40; 
     FIG. 41 is: a plan view of a further embodiment of a fitting according to the invention; 
     FIG. 42 is: a section along the line A—A in FIG. 41; 
     FIG. 43 is: a plan view of this embodiment of a fitting with the handle shown in the release position; 
     FIG. 44 is: a section along the line A—A in FIG. 43; 
     FIG. 45 is: a representation of a furniture fitting according to the invention with the parts shown disassembled; 
     FIGS. 46 a  and  46   b  are: a representation of the expansion portion with a solid body and a cylindrical portion; 
     FIG. 47 is: a plan view of a fitting according to the invention; 
     FIG. 48 is: a section along the line A—A in FIG. 47; 
     FIG. 49 is: a section along the line B—B in FIG. 47; 
     FIG. 50 is: the cutaway portion A in FIG. 48; 
     FIG. 51 is: a plan view of a fitting according to the invention in the braced position; 
     FIG. 52 is: a section along the line A—A in FIG. 51; 
     FIG. 53 is: a section along the line B—B in FIG. 51; 
     FIG. 54 is: the cutaway portion A in FIG. 52; 
     FIGS. 55 a  and  55   b  are each: a representation of a further embodiment of an expansion portion; 
     FIG. 56 is: a further plan view of a fitting portion according to the invention; 
     FIG. 57 is: a section along the line A—A in FIG. 56; 
     FIG. 58 is: a section along the line B—B in FIG. 56; 
     FIG. 59 is: the cutaway portion A in FIG. 57; 
     FIG. 60 is: a plan view of the fitting according to the invention in the clamping position; 
     FIG. 61 is: a section along the line A—A in FIG. 60; 
     FIG. 62 is: a section along the line B—B in FIG. 60; 
     FIG. 63 is: the cutaway portion A in FIG. 61; 
     FIGS. 64 a, b  and  c  are: representations of the expansion sleeve; 
     FIG. 65 is: a longitudinal section through the expansion portion and the expansion sleeve when anchored in soft wood, and 
     FIG. 66 is: a longitudinal section through the expansion portion and the expansion sleeve when anchored in hardwood. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     In the embodiment shown in FIGS. 1 to  15 , the furniture fitting according to the invention comprises a fitting body  1 , which is, for example, in the form of a base plate for a hinge arm, an expansion sleeve  7 , a pin-shaped expansion portion  2  and a handle  4 . A peg-shaped pin  3  is provided for connecting the handle  4  to the expansion portion  2 . 
     The expansion sleeves  7  are of a dowel-like design and are formed by very thin sleeves, preferably made from quenched and tempered or hardened steel. The expansion sleeves  7  are preferably surface-treated. In the embodiments the expansion sleeve casing face is designed to be phosphated. On its casing the expansion sleeve  7  has a plurality of axially offset rib-like projections which improve the hold in a wooden casing of a furniture part  19 . The expansion portions  2  may be of both metal and plastics. Preferably, however, a metal is used, in particular a quenched and tempered or hardened steel. The expansion portion  2  may be in the form of both a pin with a solid body and a cylindrical sleeve (FIGS. 46 a  and  46   b ). 
     On the side of the fitting body  1  further from the furniture part  19  the expansion portion  2  is articulated, by means of a bolt, on a clamping portion, which is in the form of the handle  4 . The handle  4  is directly supported on the fitting body  1 , and the expansion portion  2  can be rotated by means of the handle  4 . 
     The expansion portion  2  furthermore projects through an opening in the fitting body  1 , which opening is formed by two slots  9  and segment-like recesses  9 ′. 
     The expansion portion  2  has an opening  10  into which a bolt  5  is inserted. The bolt  5  projects from both sides of the expansion portion  2  and, with its extremities, which act as retaining pegs, it projects into guide slots  6  in the expansion sleeve  7 . The guide slots  6  have a region  6 ′ extending in the circumferential direction of the expansion sleeve  7  and a region  6 ″ aligned at an angle to the generatrices of the expansion sleeve  7  having a cylindrical casing. 
     The expansion sleeve  7  also has two tabs  8  which, in the assembled state, project into the slots  9  of the fitting body  1  and form an anti-torsion device for the expansion sleeve  7 . 
     The expansion sleeve  7  is also provided with longitudinal slots  35  and, at its free extremity, has obliquely inwardly angled tabs  36  which cover the front of the expansion portion  2 . 
     During assembly of the fitting body  1 , as FIGS. 4 and 6 show, the body  1  is placed on the furniture part  19  and, together with the expansion portion  2 , the expansion sleeve  7  is inserted into the drilled hole  29  in the furniture part  19 . At this time, as shown in FIGS. 6 and 7, the expansion sleeve  7  is unbraced. The bolt  15  is in the guide slots in the position shown in FIG.  5 . 
     The expansion portion  2  is provided with grooves  15  (FIG.  7 A), into which project projections  38  of the fitting body  1 . This prevents an axial movement of the expansion portion  2  relative to the fitting body  1 . 
     To brace the expansion sleeve  7  and secure the fitting body  1  to the furniture par  19  the handle  4  is turned, causing a movement of the bolt  5  relative to the expansion sleeve  7  in the guide slots  6 . During this process, as shown in FIGS. 9 and 10, the expansion sleeve  7  is raised, i.e. slightly withdrawn from the drilled hole  29  in the furniture part  19 , while the expansion portion  2  is held in an axially immovable manner in the fitting body  1 . The expansion sleeve  7  thus spreads apart as shown in FIG.  10 . FIG. 9 shows the position of the bolt  5  in the guide slots when the handle  4  is in the intermediate position shown in FIG.  8 . 
     The tabs  8 , which are held in the slots  9  of the fitting body  1 , prevent the expansion sleeve  7  from co-rotating with the handle  4  and the expansion portion  2 . 
     Finally, in order to brace the expansion sleeve  7  in the furniture part  19 , the handle  4  is brought into the end position shown in FIG. 12, the bolt  5  inside the guide slots  6  being in the position shown in FIG.  13 . As shown in FIGS. 14 and 15, the expansion sleeve  7  is pressed apart to the maximum and is firmly anchored in the drilled hole  29  of the furniture part  19 . 
     The front face of the expansion sleeve  7  facing the handle  4  is covered by the fitting body  1  (see FIG. 15 a ), which means that the expansion sleeve  7  cannot be withdrawn too far from the drilled hole  29 . 
     In the embodiment shown in FIGS. 16 to  25 , the expansion portion  2  is formed in one piece with a tool-accommodating portion  13  in the form of a screw head. In the embodiment the tool accommodating portion  13  is provided with a cross recess for a screwdriver for recessed-head screws. 
     The expansion sleeve  7  differs from the expansion sleeve  7  of the previous example in that it has on its inner casing pegs  16  which perform the function of the bolt  5  of the previous embodiment. 
     The expansion portion  2  is provided with grooves  12  which correspond to the guide slots  6  of the previous embodiment and into which project the pegs  16  of the expansion portion  2 . Like the guide slots  6 , the grooves  12  are of an angled design with a region extending along a circumferential line of the expansion portion  2  and a region at an angle to the fitting body  1 . The guide function of the grooves  12  corresponds to that of the guide slots  6 . The expansion portion  2  could also be designed with a sleeve which is connected to the tool-accommodating portion  13  and which, instead of the grooves  12 , again has guide slots for the pegs  16 ′. 
     The expansion sleeve  7  again has pegs  8  which project into slots  9  in the fitting body  1  and which act as an anti-torsion device for the expansion sleeve  7 . 
     To secure the fitting body  1 , the body is brought to abut the furniture part  19  with the expansion portion  2  and the expansion sleeve  7 , as shown in FIGS. 20 and 21. The expansion sleeve  7  is unbraced and can therefore be inserted easily into the drilled hole  29  in the furniture part  19 . 
     Turning the expansion portion  2  with a screwdriver causes the expansion sleeve  7  to spread apart, as shown in FIGS. 22,  23  and  25 , and to be anchored in the drilled hole  29  of the furniture part  19 . 
     To prevent the expansion portion  2  from being accidentally withdrawn from the drilled hole  29  in the furniture part  19  when the expansion sleeve  7  is released, the fitting body  1  is provided with projections  18  which are directed towards the expansion portion  2  and which the expansion portion  2  abuts with a shoulder when the expansion portion is moved out of the drilled hole  29 . The expansion portion  2  is anchored in the fitting body  1  by the projections  18 . When the fitting is assembled, the projections  18  are aligned approximately perpendicularly to the surface of the fitting body  1  before the expansion portion  2  is inserted. After the expansion portion  2  has been inserted into the fitting body  1 , the projections  18  are compressed so that they occupy the position shown in FIGS. 21 and 23 and lock the expansion portion  1  in the fitting body  1 . 
     In the embodiment shown in FIG. 25 the fitting body  1  has a collar  33  which projects into the drilled hole  29 . At the same time, the tabs  8  of the expansion sleeve  7  are accommodated in slots in the collar  33 . As in the previous embodiment, the expansion portion  2  is locked in the fitting body by means of projections of the fitting body  1 . The projections protrude out from collar  33 , forming on the one hand nubs  33 ′, which act as a guide for the expansion portion  2  and, on the other hand, frontal stops for the shoulder of the expansion portion  2 , the stops preventing the expansion portion  2  from being pressed out of the fitting body  1  and hence out of the drilled hole  29 . The fact that the expansion portion  2  is axially anchored in the fitting body  1  means that, when the fitting is detached, the expansion sleeve  7  is pressed securely into the drilled hole  29  and is detached from the wall of the drilled hole  29 . 
     In the embodiment shown in FIG. 25 the fitting body  1  closely abuts the furniture part  19 . 
     In the embodiment the pegs  16  are formed by pot-like nubs of the expansion sleeve  7 . 
     In the embodiment shown in FIGS. 26 to  32  the expansion sleeve  7  is provided with two brackets  20  having holes through which projects a bolt  23 , by means of which the expansion sleeve  7  is articulated on a rocker arm  21 . The rocker arm  21  acts as a clamping portion for the expansion sleeve  7 . 
     In this case the brackets  20  project through slots  22  in the fitting body  1 . 
     The expansion portion  2  is in cylindrical form and has a peg  24  which can be inserted into a hole  26  in the fitting body  1 . The peg  24  is preferably riveted in the fitting body  1 . 
     The rocker arm  21  is provided with a cam  17  by which it is supported in the clamping position on the fitting body  1 . 
     In the position shown in FIGS. 26 and 30 the rocker arm  21  is in the release position and the expansion sleeve  7  can be inserted with the expansion portion  2  into the drilled hole of the furniture part  19 . The rocker arm  21  is subsequently rocked into the position shown in FIG. 31, whereupon the expansion sleeve  7  is pulled towards the fitting body  1  by means of the bolt  23  and the brackets  20  and is spread apart as shown in FIG.  32 . 
     In the embodiment shown in FIGS. 33 and 35 the expansion sleeve  7  is formed by two complementary half-dishes  27  which again have brackets  20 , by means of which they are secured by the bolt  23  and thus to the rocker arm  21 . As in the previous embodiment the expansion portion  2  is provided with a peg  24  which can be inserted into a hole  26  in the fitting body  1 . Again, as in the previous embodiment, the expansion sleeve  7  is formed by the two half-dishes  27  is braced in the drilled hole  29  of the furniture part  19  by the rocking of the rocker arm  21 , during which process the half-dished are pulled towards the fitting body  1 . 
     In the embodiment shown in FIGS. 36 to  40  the expansion sleeve  7  is secured in an annular traction portion  25  having two brackets through slots  22  in the fitting body  1  and are secured by a bolt  23  connecting the brackets  28  to the rocker arm  21 . 
     The expansion portion  2  is of the same design as in the previous embodiment. 
     The cylindrical expansion sleeve  7  has an outwardly unflanged collar  11  by which it is secured in the traction portion  25 . 
     In the region of the traction portion  25  the expansion sleeve  7  is preferably provided with a compressed portion  30  to ensure that the expansion sleeve  7  is held tightly in the traction portion  25 . The expansion sleeve is again spread apart by rocking the rocker arm  21 , which is shown in the release position in the Figures. 
     In the embodiment shown in FIGS. 41 and 44 a hook  31  is punched out of the fitting body  1 , under which hook a lug  32  of the rocker arm  21  engages when the clamping lever is in the release position. This makes it possible to remove the fitting body  1  from the furniture part  19  by means of the rocker arm  21  or to withdraw the expansion sleeve  7  from the drilled hole  29  in the furniture part  19  without the rocker arm  21  exerting traction on the expansion sleeve  7  or the expansion portion  2 . 
     When the rocker arm  21  is in the clamping position, the lug  32  abuts the fitting body  1 . 
     In most of the embodiments shown, the fitting body  1  is in the form of a plate with a collar  14  which is supported on the furniture part  19 . When the expansion sleeve  7  is clamped, the fitting body  1  is preferably pushed slightly through to produce resilient bracing. 
     In the embodiment shown in FIGS. 45 to  66  sleeve  7  is again provided with two brackets  20  having holes through which projects the bolt  23 , by means of which the expansion sleeve  7  is articulated on the rocker arm  21 . The rocker arm  21  is again provided with a cam  17  by which it is supported in the clamping position on the expansion portion  2 . 
     At the same time, the brackets  20  project through an opening or openings in the fitting body  1 . 
     In the position shown in FIGS. 45,  47 ,  48  and  49  the rocker arm  21  is in the release position and the expansion sleeve  7  can be inserted with the expansion portion  2  into the drilled hole  29  of the furniture part  19 . The rocker arm  21  is subsequently rocked into the position shown in FIGS. 51,  52  and  53 , whereupon the expansion sleeve  7  is pulled towards the fitting body  1  by means of the bolt  23  and the brackets  20  and is spread apart. 
     The expansion sleeve  7  may also be formed by two complementary dishes which complement each other to form a closed sleeve and which again have brackets  20  by means of which the dishes are secured in the bolt  23  and hence in the rocker arm  21 . 
     When the fitting is assembled, the expansion portion  2  is inserted from the visible side of the fitting body  1  through the opening  9  and, on the assembly side of the fitting body  1 , projects from the body. At its extremity on the fitting body side, the expansion portion  2  is, furthermore, provided with a small plate  40  which, on the visible surface side, is accommodated in a recess  41  of the fitting body  1 . 
     The expansion sleeve  7  is secured in the fitting body  1  from the assembly side and projects with its brackets  20  through openings in the fitting body  1 . 
     On its side facing the furniture wall  19 , i.e. on the assembly side, the recess  41  is defined by brackets  42  which have been compressed after the expansion portion  2  has been secured in the fitting body  1 , whereby the expansion portion  2  is anchored in the fitting body  1  in a captive manner. At the same time, the tabs  42  project either into holes  43  of the sleeve-shaped expansion portion  2  or into an annular groove  44  of the expansion portion  2  if this is in the form of a full cylinder. In this case the annular groove  44  is defined by the small plate  40  and the cylindrical body of the expansion portion  2 . 
     As FIG. 50 in particular shows, the small plate  40  may be folded and thus of a reinforced design. 
     As shown in FIGS. 64 a  to  64   c , the expansion sleeve  7  is provided with openings  45  and  46 . The openings  45  are circular and the openings  46  are pear-shaped or triangular. 
     The openings  45 ,  46  can also be in the form of a recess on the borders of the expansion sleeve  7  formed by two dishes, in which case the recesses complement each other to form a circumferentially closed opening when the expansion sleeve  7  is assembled. 
     These openings  45 ,  46  improve the deformability of the expansion sleeve  7 , thus reinforcing its hold in the wooden material, particularly in the case of a soft material. The hold of the expansion sleeve  7  in the furniture wall  19  is further improved by the fact that, when the said sleeve is spread apart, portions of the wooden material penetrate the holes  45 ,  46  as shown in FIGS. 65 and 66 and, as it were, interlock with the expansion sleeve  7 .