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BACKGROUND AND FIELD OF THE INVENTION 
     This invention relates to a hinge to be mounted on a frame of a piece of furniture, an including a hinge arm mountable on a mounting plate and lockable on the mounting plate by means of a spring activated latching member. 
     DESCRIPTION OF THE PRIOR ART 
     A hinge is known from U.S. Pat. No. 4,654,932 in which a hinge arm is lockable on a mounting plate by means of a spring activated catch mechanism. The mounting plate is fastened to a side wall of a piece of furniture. U.S. Pat. No. 5,454,144 shows a hinge with a hinge arm which is mountable on a frame of a piece of furniture. 
     SUMMARY OF INVENTION 
     It is the object of the invention to provide an improved hinge with a hinge arm that is mountable on a frame of a piece of furniture by providing an adapted spring catch mechanism. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     An embodiment of the invention now will described in more detail with reference to the accompanying drawings, in which: 
     FIG. 1 is a plan view of an embodiment of a hinge according to the invention; 
     FIG. 2 is a section along line II--II of FIG. 1; 
     FIG. 3 is a section along line III--III of FIG. 1; 
     FIG. 4 is the same section as FIG. 2 but with a hinge arm removed from a mounting plate; 
     FIG. 5 is a plan view of a latching member in the form of a slide; 
     FIG. 6 is a schematic view of the latching member in a non-locking position; 
     FIG. 7 is a schematic view of the latching member in a locking position; 
     FIG. 8 is a plan view of a further embodiment of the hinge arm; 
     FIG. 9 is a sectional view of the hinge arm and the mounting plate; 
     FIG. 10 is a schematic view of the slide and a spring; 
     FIG. 11 is a schematic view of the slide in the non-locking position; 
     FIG. 12 is a schematic view of the slide in the locking position; 
     FIG. 13 is a plan view of the hinge according to a further embodiment of the invention; 
     FIG. 14 is a sectional view along line XIV--XIV of FIG. 13; 
     FIG. 15 is a sectional view along line XV--XV of FIG. 13; 
     FIG. 16 is a schematic view of the slide and the spring according to this embodiment; 
     FIG. 17 is a plan view of a slide in the locking position; 
     FIG. 18 is a plan view of the slide in the non-locking position; 
     FIG. 19 is a sectional view of the hinge arm, the slide and the mounting plate whereby the slide is shown in the locking position; 
     FIG. 20 is a sectional view of the hinge arm, the slide and the mounting plate whereby the slide is in the non-locking position; 
     FIG. 21 is an exploded sectional view of the mounting plate, the slide and the hinge arm; 
     FIG. 22 is a plan view of a hinge according to a further embodiment of the invention; 
     FIG. 23 is a plan view of the slide; 
     FIG. 24 is a sectional view along line XXIV--XXIV of FIG. 22; 
     FIG. 25 is a plan view of a hinge according to a further embodiment of the invention; 
     FIG. 26 is a plan view of a tilting lever of this embodiment; 
     FIG. 27 is a sectional view along line XXVII--XXVII of FIG. 25; 
     FIG. 28 is a plan view of a further embodiment of a hinge according to the invention; 
     FIG. 29 is a plan view of the tilting lever of this embodiment; 
     FIG. 30 is a section view along line XXX--XXX; 
     FIG. 31 is a plan view of a hinge according to a further embodiment of this invention; 
     FIG. 32 is a plan view of the tilting lever of this embodiment; and 
     FIG. 33 is a sectional view along XXXIII--XXXIII of FIG. 31. 
    
    
     DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     With a hinge according to the invention a mounting plate 7 and a hinge arm 6 are not directly fastened to a furniture side wall 3 but to a frame 2 which abuts the front face of the furniture side wall 3. A hinge casting 4 is mounted in a bore of a door 1 and is connected to the hinge arm 6 by means of a hinge axle 5. 
     In the embodiments according to FIGS. 1 to 24 there is provided a latching member as a slide 8. The mounting plate 7 is fastened to the frame 2 of the piece of furniture by means of a mounting screw 13. The mounting plate 7 is U-shaped and abuts the frame 2 on three sides thereof, whereby two longer side webs 7&#39; abut the rear side and the front side of frame 2. 
     In a first embodiment the mounting plate 7 is provided with two pegs 12 for holding the hinge arm 6 on the mounting plate 5. The rear of hinge arm 6 is provided with a web 43 with which it is coupled to an intermediate plate 10. At the side where the hinge axle 5 is situated the intermediate plate 10 is provided with a slot in which a screw 11 is engaged for adjusting the gap of the door 1 with respect to the furniture side wall 3. The screw 11 is held in a female thread in the hinge arm 6 adjacent a side thereof. By turning the screw 11 the front end of the hinge arm 6 and the hinge axle 5 are moved with respect to the furniture side wall 3 in a direction perpendicular to the furniture side wall 3. 
     Both the hinge arm 6 and the mounting plate 7 are generally rectangular in shape as viewed in plan, and each has a pair of longer sides extending parallel to hinge axle 5 and a pair of shorter sides. 
     The slide 8 is situated between the intermediate plate 10 and the hinge arm 6. The slide 8 is provided with two hooks 45. In a locking position of the slide the hooks 45 engage in slots 46 of the pegs 12. The hooks 45 are directed to each other and bend around the pegs 12. The slide 8 has two arms 8&#39;, 8&#34; extending at a right angle to each other, each arm being parallel to an edge of the mounting plate 7. 
     The slide 8 is acted upon by a spring 9 which pushes the slide 8 into the locking position in which the hooks 45 are situated within the slots 46 of the pegs 12. This locking position is shown in FIGS. 1 and 7. The slide 8 is provided with a bent web 47. Spring 9 is situated between web 47 and a bent web 48 of the intermediate plate 10. The spring 9 can be a pressure spring and a helical spring. If pressure is exerted on the web 47 of the slide 8 in the direction of arrow L of FIG. 1 the hooks 45 of the slide 8 are moved out of the slots 46 of the pegs 12 and the hinge arm 6 can be removed from the mounting plate 7, whereby the intermediate plate 10 remains attached to the hinge arm 6. 
     According to the embodiment of the FIG. 8 and 9 the hinge arm 6 is connected to a separate arm 16 by means of a screw 15. The separate arm 16 is linked to the hinge axle 5. The hinge arm 6 is secured to the mounting plate 7 in the same way as described in the preceding embodiment. The screw 15 is held in a female thread in the hinge arm 6 and protrudes through a slot 48 in the arm 16. The arm 16 is clamped to the hinge arm 6 by means of the screw 15 and can be displaced over the length of the slot 18 in the arm 16. This displacement is in a direction perpendicular to the furniture side wall 3. The hinge arm 6 is again provided with a web 43 with which it is coupled to intermediate plate 10. On the side directed to the hinge axle 5 the intermediate plate 10 is provided with protrusions 50 which protrude into slots in the hinge arm 6. By means of these protrusions the hinge arm 6 and the intermediate plate 10 are coupled to each other. 
     The slide 8 which acts as a latching member is situated between the intermediate plate 10 and the hinge arm 6. The slide 8 is provided with two arms 8&#39;, 8&#34; which in locking position rest in the slots 46 of the pegs 12. The slide 8 is displaceable in the direction of the height of the frame 2, whereby the spring 9 counteracts such displacement. The slide 8 is provided with a bent web 47 which acts as a handle and by which the slide 8 is moveable. The spring 9 is situated between the web 8&#34; of the slide 8 and a web on the mounting plate 7. The spring 9 can be a pressure spring and a helical spring. If the slide 8 is moved in the direction of arrow L of FIG. 8 the arms 8&#39;, 8&#34; are moved out of the slots 46 of the pegs 12 and the hinge arm 6 is removable from the mounting plate. 
     The mounting plate 7 is fastened to the frame 2 of the piece of furniture by means of fastening screw 13. The fastening screw 13 extends through a slot 51 in the mounting plate 7 so that the mounting plate 7 is adjustable over the length of the slot 51 and the position of the hinge arm 6 is adjustable in the direction of the height of the piece of furniture. 
     In the embodiment according to FIGS. 13 to 21 the hinge arm 6 is provided with pegs 12. The arm 16 which is linked to the hinge axle 5 is fastened to the hinge arm 6 by means of a screw 15. In the mounted position the pegs 12 extend through holes 17 in the mounting plate 7. The slide 8 is situated beneath the mounting plate 7 (with respect to the frame 2). As in the embodiment described before, the slide 8 is provided with two arms 8&#39;, 8&#34;. The slide 8 is acted upon by a spring 9 which is situated in a recess 19 of the slide 8. The spring 9 can be a pressure spring and a helical spring. The slide 8 is moveable perpendicularly to the closing plane of the door 1. FIG. 17 shows the locking position of slide 8 whereby the arms 8&#39;, 8&#34; rest in the slots 46 of the pegs 12. The slide 8 is again provided with a bent web 18 acting as a handle. If the slide 8 is moved against the action of the spring 9 out of the position shown in FIG. 19 and into the position shown in FIG. 20, the slide 8 is removed from the pegs 12 and the hinge arm 6 can be removed from the mounting plate 7. 
     In the embodiment according to FIGS. 22 to 24 the hinge arm 6 is also coupled to an intermediate plate 10 by means of a bent web 43 and a screw 11. The bent web 43 is situated behind the frame 2 and the screw 11 is situated at the front of the frame 2. The slide 8 which is positioned between the intermediate plate 10 and the hinge arm 6 is of longitudinal form and is aligned parallel to the hinge axle 5. A spring can be provided for acting on the slide 8 but such a spring is not necessary. The slide 8 can also be moved by hand into the locking position. As shown in FIG. 22 the ends of the slide 8 project from underneath the hinge arm 6 on two sides of the hinge arm 6 so that the slide 8 can be manually displaced by gripping the two ends. The slide 8 is provided with a recess 52 to accommodate the fastening screw 13. 
     In the embodiments of FIGS. 25 to 33 the latching member is constituted by tilting lever devices 33, 38, 41. Tilting lever devices 33, 38 are tiltable about an axle 37 which extends perpendicular to the mounting plate 7. 
     In the embodiments of FIGS. 25 to 30 the devices 33, 38 each include two separate tilting levers, both mounted on a common axle 37 similar to a pair of scissors. In both embodiments the pegs 12 are provided on the mounting plate 7 and they extend through an intermediate plate 10 to which the hinge arm 6 is coupled. The hinge arm 6 is, like in the before-mentioned embodiment, provided with a bent web 43 by means of which it is coupled to the intermediate plate 10 in the rear of the frame 2. A screw 11 is provided which is held in the female thread in the hinge arm 6 and by its screw head in a slot in the intermediate plate 10. Again two pegs 12 are provided. The tilting lever devices 33, 38 are two two-arm levers, one arm 33&#39;, 38&#39; being the holding arm which rests in the slot 46 of the peg 12 and the other arm 33&#34;, 38&#34; being the handle. In the embodiment according to FIG. 25, to release the hinge arms 6 from the mounting plate 7 the arms 33&#34; of the tilting levers 33 are pressed towards the frame 2. In the embodiment according to FIG. 28 to 30, to release the hinge arm 6 from the mounting plate 7 the arms 38&#34; of the tilting levers 38 are moved towards each other and brought into a position in which they overlap each other. In this way the arms 38&#39; are removed from the slots 46 in the pegs 12. 
     In the embodiment of FIG. 31 to 33, a single tilting lever 41 is provided. The tilting lever 41 has two handle parts 41&#39;, 41&#34;. The handle parts 41&#39; and 41&#34; extend beyond opposite sides beyond the hinge arm 6. The tilting lever 41 is provided with an opening 42 surrounding the fastening screw 13. Further, the tilting lever 41 is provided with slots 48 each in the form of an arc and into which protrude guiding pegs 23 which are provided on the intermediate plate 10 or on the mounting plate 7. By means of the guiding pegs 23 and the slots 48, the stability of the tilting lever 41 is increased. Also in this embodiment, the mounting plate 7 is provided with two pegs 12 and in the locking position the tilting lever 41 rests with his handle members 41&#39; and 41&#34; in the slots 46 of pegs 12. By tilting the tilting member 14 clockwise, the hinge arm 6 is released from the mounting plate 7. Again the tilting lever 41 is situated between an intermediate plate 10 and the hinge arm 6. The hinge arm 6 is provided with a bent web 43 and a screw 11 by means of which it is coupled to the intermediate plate 10.

Summary:
A hinge to be mounted on a frame of a piece of furniture includes a hinge arm which is mounted on a mounting plate and is lockable on the mounting plate. The hinge arm is articulated by means of at least one hinge axle to a hinge member which is fastenable to a door. The hinge arm or the mounting plate is provided with pegs having slots into which a spring activated latching member which is movable parallel to the mounting plate is engageable, thus locking the hinge arm to the mounting plate. The mounting plate and the hinge arm are of rectangular configuration with two longer sides and two shorter sides, whereby the longer sides of the mounting plate and the hinge arm are aligned parallel to the hinge axis. The mounting plate is provided on its longer sides with webs extending perpendicular to the mounting plate for abutment with the frame when in mounted position. The latching member is provided with a handle situated at one of the long sides of the hinge arm.