EP0052283B1 - Hinge arm with mounting plate - Google Patents

Abstract

The mounting plate has a track for slidably guiding the hinge bracket in an axial direction and a bore for longitudinally slidably guiding a spring-loaded detent pin, which protrudes from the bore and is held captive therein by at least one stop in the surface defining the bore. The hinge bracket has a sloping surface, which is arranged to force the detent pin into the bore as the hinge bracket is slidably moved onto the mounting plate. The hinge bracket also has a surface which as the hinge bracket is pushed over the detent pin holds the latter in a depressed position until the detent pin snaps into a detent opening of the hinge bracket so that the latter is releasably fixed. A locking mechanism of the type used in retractable ball point pens is provided and is adapted to lock the detent pin in two different (partly extended and fully extended) positions. The pin is adapted to be moved from one of said positions to the other in that the detent pin is depressed into the bore and then released. The free end of the detent pin lies in the path of the sloping surface when the detent pin is in its partly extended position. The pin which has been depressed by the sloping surface is adapted to snap into the detent opening and to be urged in said detent opening by the spring toward its fully extended position.

Description

The invention relates to a hinge arm with a mounting plate, which is provided with a guide for pushing on the hinge arm in the axial direction and a bore in which a protruding and secured by at least one stop located in the wall against falling out against spring force is guided longitudinally. which, when the hinge arm is pushed open, can be pressed in by an inclined surface arranged on it and is held in a pressed-in position by a wall of the pushed-over hinge arm until it snaps into a latching opening located in the hinge arm for releasable fixing thereof.

Snap connections for attaching hinge arms to mounting plates which have already been preassembled, for example, on supporting wall abutment parts are already known in various embodiments. They serve the need to be able to assemble furniture parts provided with hinge joints quickly and easily. Usually, it is necessary to screw the hinge arms onto the associated mounting plates, which is simple work, but, for example in the case of doors provided with a plurality of hinge joints, nevertheless requires a cumulative expenditure of time. It should also be taken into account that the hinge arms usually have to be screwed on while holding the door at the same time, which makes work more difficult for the fitter. Hinge arms locked in place with snap connections to the mounting plates help here.

In one known from DE-A-25 12656 fastening device for hinge arms of the type specified at the outset, a sleeve-shaped receiving part forming the fastening plate is connected to the supporting wall stop part, which is provided with guides for the hinge arm to be inserted, the hinge arm or the sleeve-shaped receiving part having latching openings in one part and spring-loaded locking pins are provided in the other part, which fall into the locking opening when passing over it. To push in the locking pins when inserting the hinge arms into the receiving part, wedge-shaped inclined surfaces are provided, but are only able to slide over the upper sides of the locking pins if these do not protrude beyond the inclined surfaces. The locking pins can therefore only protrude their guide holes by an amount that lies in the area of the inclined surfaces when inserted and which may not ensure sufficient fixation of the hinge arm on the mounting plate after the locking pins have snapped into the locking openings. If the locking pins protrude their guide holes by a larger amount, they have to be pressed in so far when pushing the hinge arms onto the mounting plate that they reach the area of the inclined surfaces, which, however, complicates the assembly again.

The object of the invention is therefore to provide a snap connection for a hinge arm with a mounting plate which on the one hand is easy to manufacture and on the other hand ensures a secure connection of the two parts.

According to the invention, this object is achieved with a hinge arm of the type specified at the outset in that the pin is locked in two end positions of different heights by means of a ballpoint pen mechanism and can be transferred from one end position to the other by pressing into the bore and subsequent relieving, and in that the top of the pin is in the lower end position at the level of the path of movement of the inclined surface and the pin snaps into the latching opening after being pressed through the inclined surface, in which it is acted upon by the spring in the direction of its higher end position. The use of the ballpoint pen mechanism according to the invention ensures that the pin for mounting the hinge arm is in its lower end position, in which it is surely gripped by the wedge-shaped inclined surface, pressed in and prepared in such a way that it springs out into its higher end position when the latching opening is passed over can. In the snap connection according to the invention for the hinge arm with the fastening plate, the locking pin therefore has two end positions, namely a lower one in which it can be inserted without complicated manipulations, and a higher one which ensures a sufficiently deep engagement in the latching opening.

In a further embodiment of the invention it is provided that the displacement path of the hinge arm in the guide of the fastening plate is limited by at least one stop and the pin has a beveled, frustoconical or rounded head with which the pin, which has not yet been pressed into its higher end position, has such a shape is supported on an edge area of the latching opening in such a way that it holds the hinge arm with a counter-stop without play against the stop of the fastening plate. The snap connection known from DE-A-25 12 656 has the disadvantage that play of the locking pins in the locking openings cannot be avoided in principle, so that an annoying wakkein of the parts connected by the hinge joints can occur. This wakkein is avoided in this inventive design of the subject of the application that the locking pin constantly exerts a push on the edge region of the locking opening, so that the hinge arm and the mounting plate are clamped together without play. Of course, the rounded or beveled parts of the locking pin are to be designed in such a way that they cannot completely immerse into the locking opening and constantly exert a push on the locking opening.

According to a further preferred embodiment of the invention, it is provided that an adjusting screw serving for the joint adjustment is screwed into the hinge arm, which is provided with an annular groove, is guided in this in an elongated hole-shaped guide of the fastening plate and with the flanks of the annular groove the upper and lower edges of the Leadership overlaps. In order to be able to simply insert the groove in the adjusting screw into the slot guide, it is expediently open on one side.

The guide in the mounting plate expediently consists of longitudinal grooves arranged on both sides thereof, into which the expediently U-shaped hinge arm engages with sliding edges which are angled inward from the ends of its legs.

The stops and counter-stops serving for tensioning can be formed by the groove ends and the end edges of the sliding edges.

According to a further inventive embodiment, it is provided that the sliding edges are guided in the grooves with play and the end regions of the grooves are inclined upwards or downwards to compensate for play. If the sliding edges move into the angled or curved end region of the grooves, these, since they are straight, abut the groove flanks, so that any play is compensated for by the resulting tilting.

• Fig. 1 einen Längsschnitt durch eine Befestigungsplatte,
• Fig. 2 eine Vorderansicht der Befestigungsplatte nach Fig. 1,
• Fig. 3 eine Draufsicht auf die Befestigungsplatte nach Fig. 1,
• Fig. 4 eine Vorderansicht des mit der Befestigungsplatte verrastbaren Scharnierarms,
• Fig. 5 einen Längsschnitt durch den Scharnierarm nach Fig. 4,
• Fig. 6 eine Draufsicht auf den Scharnierarm nach Fig. 5,
• Fig. 7 eine Seitenansicht der Befestigungsplatte mit teilweise aufgeschobenem Scharnierarm in einem seitlichen Längsschnitt, dessen Schrägfläche noch vor dem in seiner unteren Endstellung befindlichen Raststift liegt
• Fig. 8 eine der Fig. 7 entsprechende Darstellung mit von dem mit der Schrägfläche versehenen Nocken eingedrückten Raststift,
• Fig. 9 eine den Fig. 7 und 8 entsprechende Darstellung des Scharnierarms und der Befestigungsplatte in ihrer miteinander verrasteten Stellung,
• Fig. 10 einen Schnitt entlang der Linie X-X der Fig. 11 durch den mit der Bohrung für den Raststift versehenen Teil der Befestigungsplatte in Höhe der mit den Führungsrippen der Druckkugelschreibermechanik versehenen Wandung,
• Fig. 11 einen Längsschnitt durch die Bohrung längs der Linie XI-XI in Fig. 10,
• Fig. 12 eine Seitenansicht des Druckstücks der Druckkugelschreibermechanik,
• Fig. 13 eine Unteransicht des Raststifts,
• Fig. 14 eine Draufsicht auf das Druckstück nach Fig. 12,
• Fig. 15 eine Seitenansicht des Raststifts nach Fig. 13, und
• Fig. 16 bis 18 Abwickelungen der mit Rippen versehenen Wandung der Bohrung sowie der seitlichen Profile des Druckstücks und des Raststifts in der unteren und der oberen Endstellung des Raststifts.

An embodiment of the invention is explained below with reference to the drawing. In this shows

• 1 is a longitudinal section through a mounting plate,
• 2 is a front view of the mounting plate of FIG. 1,
• 3 is a plan view of the mounting plate of FIG. 1,
• 4 is a front view of the hinge arm which can be locked with the fastening plate,
• 5 shows a longitudinal section through the hinge arm according to FIG. 4,
• 6 is a plan view of the hinge arm of FIG. 5,
• Fig. 7 is a side view of the mounting plate with a partially pushed hinge arm in a lateral longitudinal section, the inclined surface of which is still in front of the locking pin located in its lower end position
• 8 shows a representation corresponding to FIG. 7 with the locking pin pressed in by the cam provided with the inclined surface,
• 9 shows a representation of the hinge arm and the fastening plate corresponding to FIGS. 7 and 8 in their latched position,
• 10 shows a section along the line XX of FIG. 11 through the part of the fastening plate provided with the bore for the locking pin at the level of the wall provided with the guide ribs of the ballpoint pen mechanism,
• 11 shows a longitudinal section through the bore along the line XI-XI in FIG. 10,
• 12 is a side view of the pressure piece of the ballpoint pen mechanism,
• 13 is a bottom view of the locking pin,
• 14 is a plan view of the pressure piece of FIG. 12,
• Fig. 15 is a side view of the locking pin according to Fig. 13, and
• Fig. 16 to 18 developments of the ribbed wall of the bore and the lateral profiles of the pressure piece and the locking pin in the lower and the upper end position of the locking pin.

The fastening plate 1 has a substantially cuboid shape and is provided with holes 3, 4 for fastening screws in the region of its rear and front end.

In its central region, the mounting plate 1 has a bore 5 in which the locking pin 6 is guided so as to be longitudinally displaceable. The locking pin 6 has at its lower end a profile described in more detail below, which belongs to a ballpoint pen mechanism. This profiling interacts with bevelled ribs of a pressure piece 7, which is loaded by a compression spring 8 in the direction of the locking pin 6. This compression spring 8 is supported with its lower end on a cross pin 9 passing through the bore 5 and with its upper end on the pressure piece 7. The inner wall of the bore 5 is also provided with a rib-shaped profiling which, together with the profiling of the locking pin 6 and the pressure piece 7, forms the ballpoint pen mechanism described in more detail below. The profiling located at the lower end of the locking pin has a larger diameter than the locking pin itself, so that these shoulders are formed, which cooperate with an annular shoulder in the upper region of the bore 5, which forms a stop and thus the upper position of the locking pin 6 determines and prevents it from falling out of the bore 5. Due to the mechanical ballpoint pen mechanism, the locking pin 6 can be set to a lower and a higher end position by pushing it in.

The mounting plate 1 is provided with lateral groove-shaped guides 11, 12 for the slide rod 13, 14 of the hinge arm 16. The front regions 17 of the guides 11, 12 are angled slightly upwards in the manner shown in FIGS. 7 to 9.

The fastening plate 1 is provided in the area of the upper side of its rear end with a cross-sectionally T-shaped recess which is open towards the end of the fastening plate and rounded at its front closed end. This recess forms a guide for the adjusting screw 20 which is provided with an annular groove 19 and which is screwed into the hinge arm 16. The edge strips 21 partially covering the recess 18, the inner sides of which delimit guide grooves with the base of the recess, are chamfered at the end in the manner shown in FIG To facilitate insertion of the T-shaped guide piece 22 of the adjusting screw 20.

The hinge arm 16, as can be seen in particular from FIG. 4, has a U-shaped cross section. It consists of lateral legs 23, 24 which are connected to one another by the central web part 25. In the front region of the hinge arm 16, edges forming the sliding webs 13, 14 are angled inwards from the side legs 23, 24. A bore 26 provided with a collar is punched into the web part 15, into which a nut thread for the fastening screw 20 is cut.

In the front area of the hinge arm 16, a cross-sectionally V-shaped cam 27 is embossed in its web part 25 in the manner shown in FIGS. 4 to 6. Seen from the underside of the hinge arm 16, the cam 28 is chamfered on both sides like a roof. Immediately behind the cam 18, the web part 25 is provided with a bore 28 which forms the locking opening for the locking pin 6.

To connect the hinge arm 16 to the fastening plate 1, the hinge arm with its sliding webs 13, 14 is pushed into the guide grooves 11, 12 of the fastening plate 1 in the manner shown in FIGS. 7 to 9. In order to prevent the front edge of the web part 25 from pushing against the locking pin 6 when it is pushed on, it is pressed into its lower end position, shown in FIG. 7, in which the top of the locking pin 6 lies below the web part 25 due to the ballpoint pen mechanism. When the hinge arm 16 is pushed further, the cam 27 moves over the locking pin 6 and presses the locking pin 6 with its front inclined surface 29 in the manner shown in FIG. 8. If the cam 27 releases the locking pin 6 again by pushing the hinge arm 16 further, it can spring into its upper end position. If the latching opening 28 passes over the latching pin 6, it snaps into its upper arresting end position when the latching opening and the latching bore are aligned with one another.

When the hinge arm 16 is pushed onto the fastening plate 1, the T-shaped guide piece 22 of the adjusting screw 20 also runs into the correspondingly T-shaped guide groove 18 of the fastening plate 1. Since the T-shaped guide piece 22 is held in the guide groove 18 so as to be longitudinally displaceable but immovable in the axial direction, the height of the hinge arm can be adjusted by the adjusting screw 20.

The guide grooves 11, 12 of the mounting plate 1 have front stops 30, against which the front sides of the slide rod 13, 14 abut in the latched position shown in FIG. 9.

The sliding webs 13, 14 are guided in the guide grooves 11, 12 with a slight play. Since the front area 17 of the guide grooves 11, 12 is angled slightly upwards, the sliding webs 11, 12 are tilted and slightly deformed in this area 17, so that they are locked in place. Position are held in the grooves without play.

To release the latched position of the hinge arm and mounting plate shown in FIG. 9, the locking pin 6 must be pressed in in the direction of arrow A, so that it is locked in its lower end position due to the ballpoint pen mechanism, in which the top of the locking pin 6 lies below the web part 25 . The hinge arm 16 can then be easily removed from the mounting plate because the cam 27 presses the locking pin 6 with its rear oblique surface 31.

The ballpoint pen mechanism is explained in more detail below with reference to FIGS. 10 to 18.

The wall of the bore 5 is provided in the manner shown in FIGS. 10 and 11 at the same distance from one another with six axially extending guide ribs 32. The guide ribs 32 have a crown-shaped profile, the end faces of the ribs, which are beveled in the same direction, point in the direction of the abutment 9 of the compression spring 8. The ribs 32 delimit alternately grooves 33 and 34. The grooves 33 have a greater depth over their entire length, the groove bases of which correspond to the radius of the bore 5. Adjacent to the grooves 33, the diameter of the bore decreases towards the top. The radius of this smaller diameter coincides with the radius of the tops of the ribs 32.

The grooves 34 are stepped in depth. They have an inlet area 34 ', the depth of which corresponds to the depth of the grooves 33. A region 34 "with a smaller depth adjoins the region 34 '.

The locking pin 6 shown in FIGS. 13 and 15 has a central, non-continuous bore 35, the edge of which is provided with a crown-shaped profile. The profile consists of six guide pieces 36 projecting beyond the locking pin 6 in their diameter, the width of which corresponds to the width of the grooves 33, 34. The guide pieces 36 have stepped and stops 37 forming rear sides. The guide pieces 36 are guided in the grooves 33, 34. The height of the guide pieces 36 is dimensioned such that they can also pass through the area of the grooves 34 with a smaller depth until their rear sides 37 abut the boundary walls 38 of the grooves 33, 34.

The pressure piece 7 shown in FIGS. 12 and 14 is cylindrical and has such a large diameter that it can be inserted into the bore 35 of the locking pin 6, but without being supported on the bottom of the bore. The pressure piece 7 has three guide pieces 39 protruding radially outwards evenly over its circumference. The guide pieces 39 have beveled end faces 40 which are beveled in opposite directions to the end faces 41 of the guide ribs 32. The guide pieces 39 have a height that they over the bottom of the grooves 33 and in no time th 34 can only slide in the lower region 34 '. If the guide pieces 39 are thus in the grooves 34, they abut against the step formed between the regions 34 'and 34 ".

The edge of the bore of the locking pin 6 is chamfered in a zigzag line, two opposing inclined surfaces 42, 43 each colliding on the center lines of the guide pieces 36. The helix angles of the chamfered surfaces 42, 43 correspond to those of the chamfer surfaces 41, 40.

The function of the ballpoint pen mechanism will now be explained in more detail with reference to FIGS. 16 to 18. In these figures, the development of the guide ribs of the bore 5 is shown by lines not particularly marked. The zigzag line provided with short lines represents the development of the crown-shaped edge of the locking pin 6. The cut guide pieces 39 of the pressure piece 7 are shown hatched.

Fig. 16 shows the ballpoint pen mechanism in the upper end position of the locking pin 6. In this, the spring-loaded pressure piece 7 is supported with its guide pieces 39 on the right inclined surfaces of the edge of the locking pin 6 and presses this with the rear sides 37 of its guide pieces 36 against the stops 38.

If pressure is now exerted on the locking pin 6 in the axial direction in the manner shown in FIG. 17, this pushes the pressure piece in the grooves 33 back against the force of the spring 8 until the front edges of the guide pieces 39 on the front edges of the ribs drove past. As soon as the guide pieces 39 have come free from the grooves 33 in this way, the inclined surfaces 40 slide on the inclined surfaces 42 of the guide pieces 36 of the locking pin 6 until the front edges of the guide pieces 39 abut the oppositely curved inclined surfaces 43. When the inclined surfaces slide off one another, the pressure piece 7 rotates. If the locking pin is now relieved again, the inclined surface 40 slides on the inclined surface 41 of the guide ribs 32 until the guide pieces 39 fall into the grooves 34. In these, however, they are only able to advance the guide pieces 36 of the locking pin 6 until the front edges of the guide pieces 39 abut the step which is formed between the regions of different depths 34 'and 34 ".

This position of the locking pin or the pressure piece 7 can be seen in FIG. 18.

Claims (8)

1. A hinge bracket (16) provided with a mounting plate (1), which has a track, in which the hinge bracket is adapted to be axially pushed onto the mounting plate, and a bore, which contains a detent pin (6), which protrudes from and is longitudinally slidably guided in said bore against spring force and is prevented from falling out by at least one stop in the wall of the bore and adapted to be depressed by a bevelled surface (29) of the hinge bracket as the latter is pushed onto the mounting plate and to be held in a depressed position by a wall of the hinge bracket when the latter has been pushed over the detent pin until the detent pin snaps into a detent opening (28) of the hinge bracket so that the latter is releasably held in position, characterized in that the detent pin is adapted to be locked in two end positions in different heights by a retractable ball point pen mechanism and is movable from one end position to the other in that the detent pin is depressed into the bore (5) and subsequently released, and that in the lower end position of the detent pin (6) its top surface is on the level of the path of the bevelled surface (29) and when the detent pin (6) has been depressed by the bevelled surface (29) the detent pin (6) snaps into the detent opening (28) in which it is biased by the spring (8) toward its higher end position.

2. A hinge bracket according to claim 1, characterized in that the bevelled surface (29) is constituted by a cam (27, which is bevelled like a roof on both sides.

3. A hinge bracket according to claim 1 or 2 characterized in that the displacement of the hinge bracket (16) in the track of the mounting plate (1) is limited by at least one stop (30) and the detent pin (6) has a bevelled, frustoconical or rounded head, by which the detent pin when it has not yet snapped under spring force into its end position is supported on an edge portion of the detent opening (28) in such a manner that a cooperating stop of the hinge bracket (16) is held without backlash against the stop (30) of the mounting plate (1).

4. A hinge bracket according to any of claims 1 to 3, characterized in that an adjusting screw (20) for adjusting the gap is screwed into the hinge bracket (16) and is provided with an annular groove (19) and in said groove is guided in a guide slot (18) of the mounting plate (1) and with the side faces of the annular grooves (19) overlies the top and bottom edges of the slot (18).

5. A hinge bracket according to claim 4, characterized in that the guide slot (18) is open at one end.

6. A hinge bracket according to any of claims 1 to 5, characterized in that the track in the mounting plate (1) consists of longitudinally extending grooves (11, 12), which are disposed on opposite sides of the mounting plate, and the hinge bracket (16) is channelshaped and has slidable lugs (13, 14), which are angled inwardly from the ends of the flanges (23, 24)of the hinge bracket and are received by said grooves.

7. A hinge bracket according to any of claims 1 to 6, characterized in that the stop (30) is constituted by the groove ends and the cooperating stops are constituted by the end faces of the slidable lugs (11, 12).

8. A hinge bracket according to any of claims 1 to 7, characterized in that the slidable lugs (13, 14) are guided in the grooves (11,12) with a backlash and the end portions (17) of the grooves (11,12) are upwardly or downwardly inclined to compensate the backlash.

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