EP0578905A2 - Guiding device for drawer with double extensible guide - Google Patents

Abstract

In a guiding device for drawers with double extensible guide, with a fixed body rail (1), a centre rail (2) and a drawer rail (3), the centre rail (2) being guided on the body rail (1) and the drawer rail (3) being guided on the centre rail (2) via cooperating running rollers (4, 5) respectively, and guideways formed from the rails (1 - 3) and the relative extension length of the centre rail (2) relative to the body rail (1) and of the drawer rail (3) relative to the centre rail (2) being limited by stops, there are provided, to fix at least the extension order, on the rails (2, 3) positive coupling elements (8, 10, 13) which, on extension, can be adjusted in preset extension positions via stops (17) from a position connecting the centre rail (2) to the body rail (1) or drawer rail (3) to a release position, thereby couple the centre rail (2) to the other rail (3 or 1) and can be returned, on pushing in, to the extension positions concerned. <IMAGE>

Description

The invention relates to a full extension for drawers according to the preamble of claim 1.

In the case of such full extensions, the order in which a relative adjustment of the successive rails takes place has depended more or less randomly on which of the two movable guide parts, that is to say the central rail or drawer rail, opposes the pull-out movement with less resistance. The most common case that occurs is that the drawer rail and the middle rail are partially moved at the same time relative to the middle rail or carcase rail before intended end stops limit the respective relative extension to the upstream rail. The order in which the drawer is closed is also not clearly defined. If the middle rail was also moved when the drawer was only slightly pulled out, this middle rail must be pushed in when the drawer is closed via the drawer rail, which is often almost retracted, or the front plate of the drawer itself. This can lead to undesirable noises when the interacting stops strike. Furthermore, it is often undesirable for the central rail to be moved somewhat with only a small partial extension and then to be visible from the drawer side in an undefined position relative to the drawer. So-called differential extensions with permanent connection of the rails by gears or friction locking are extremely complex and fault-prone special constructions with a special rail shape.

The object of the invention is to provide a full extension of the type mentioned, in which the sequence of pulling out and pushing in of the individual rails is clearly defined in and out of one another with simple means, automation of the inlet is made possible and, in particular, it is achieved that with a smaller one Partial extension either only the drawer rail with the drawer is adjusted or the middle rail assumes a clearly defined position to the drawer rail.

The object is achieved according to the invention by the features of patent claim 1.

Unwanted noises are prevented by using positive coupling elements. In principle, either the middle rail with the drawer rail or the middle rail with the carcase rail can be coupled for the pull-out process. In the first-mentioned embodiment, first the drawer rail and the middle rail are moved together with respect to the body rail, but their relative position is retained until the body rail is fully pulled out. The advantage of this design is that the fixed body rail can be equipped with bevels or similar guides that ensure an automatic infeed, i.e. automatic closing, of the drawer from a certain insertion state. The other option has the advantage that when the drawer is pulled out briefly, only the drawer rail is visible on the side of the extended drawer section.

In order to ensure the desired sequence in the movement sequences of the rails when entering, an embodiment according to claim 2 is selected.

A constructively advantageous embodiment of the coupling elements can be found in claim 3.

The number of necessary parts and the manufacturing costs are reduced to a portable level by the embodiment according to claim 4.

In the development according to claim 5, the stop surface forming the insertion counter-stop remains in the release position for the snap latch in the engagement area of the driver until the latch engages again when the middle rail is inserted and this middle rail is fixed in the insertion position.

The counterstop can be carried out according to claim 6. Man but can also form the driver from two with the two sides of a protruding nose of the counter-stop protrusions, which at most have different heights, the projection which becomes effective when inserted is lower, so that the counter-stop is released after the latch has been latched.

The solution according to the invention can be implemented constructively in various ways. It is possible to provide dead center locking or other positive locking for the swivel bolt in two positions, each of which occurs when the driver hits the push-out stop or the impact of a part connected to the swivel bolt on a counter stop cooperating with or formed by the counter holder can be released for the adjustment of the bolt in one or the other position. According to a simple embodiment, the snap lock is designed according to claim 7.

A further development of the construction described last is specified in claim 8.

By appropriate shaping of this molded part, the support flanges or other supports of the rail and by selecting the opening size, it is possible to design the molded part as a body which can be snapped into the central rail, so that extremely simple assembly is possible. By producing the molded part from a correspondingly elastic plastic, not only is freedom from corrosion achieved, but what is particularly important here is that no disruptive or actually noticeable noises occur when the swivel bolt is actuated and when stops come together. Of course, it is also possible to provide a multi-part construction instead of the one-part plastic construction described, in which even the individual parts can be produced from different materials.

An education according to claim 9 can be chosen to clearly define the two possible working positions.

An advantageous development of the construction described last is specified in claim 10.

The embodiment variant according to claim 11 simplifies the manufacture of the coupling elements, particularly in the case of more complicated shapes, and it also becomes easier to fasten the coupling elements comprising the swivel bolt to the associated rail. In particular, you can form simple mounting approaches for the cage on the respective rails, so that optionally only an optional attachment of the coupling elements is possible with the same basic construction of the full extension. To simplify assembly and to protect against loss, an embodiment according to claim 12 is selected.

In the case of a direct mounting of the pivot bolt on the rail, an embodiment according to claim 13 can be selected.

Even with an embodiment according to claim 14, a positive entrainment of the central rail is guaranteed in both positions. By appropriate design of the mounting opening of the molded part it is achieved that the part forming the counterstop remains at least in the position corresponding to the locking position of the bolt out of engagement with the central rail itself, ie does not rub against its surface.

Further details and advantages of the subject matter of the invention can be found in the following description of the drawings.

Fig. 1

einen Vollauszug im Endbereich der Korpusschiene bei voll aus der Mittelschiene ausgezogener Ladenschiene und noch an der Korpusschiene gehaltener Mittelschiene mit dem Formteil und dem Mitnehmer in Seitenansicht,

Fig. 2

den Vollauszug nach Fig. 1 bei bereits freigegebener und teilweise ausgezogener Mittelschiene,

Fig. 3

eine der Fig. 2 entsprechende Darstellung einer ersten Ausführungsvariante,

Fig. 4

eine der Fig. 1 entsprechende Darstellung einer zweiten Ausführungsvariante,

Fig. 5

eine der Fig. 1 entsprechende Darstellung einer dritten Ausführungsvariante und

Fig. 6

eine der Fig. 2 entsprechende Darstellung der dritten Ausführungsvariante.

The subject matter of the invention is illustrated in the drawing, for example. Show it

Fig. 1

a full extension in the end area of the carcass rail with the drawer rail fully extended from the central rail and the central rail still held on the carcass rail with the molded part and the driver in a side view,

Fig. 2

1 with the middle rail already released and partially extended,

Fig. 3

2 shows a representation of a first embodiment variant,

Fig. 4

1 shows a representation of a second embodiment variant,

Fig. 5

1 corresponding representation of a third embodiment and

Fig. 6

one of the Fig. 2 corresponding representation of the third embodiment.

In the drawing, the known parts of the full extension have been given the same reference numerals. This also applies to other matching parts. Equivalent parts were identified in FIGS. 3 and 4 by the addition a or b and in FIGS. 4 and 5 by the addition c. Finally, in order to achieve a better overview, the middle rail was illustrated transparently by dash-dotted lines. The molded part having the latch was cross-hatched in FIGS. 1 to 4. A corresponding hatching was also used in the cage according to FIGS. 5 and 6.

The full pull-outs shown have a body rail 1, a middle rail 2 and a drawer rail 3. The body rail 1 carries near the front end a roller 4 on which the middle rail 2 is supported by a guide formed by an upper edge flange, the middle rail 2 is provided in its rear end region with a further roller, not shown, which runs on a corresponding guide of the body rail. The central rail 2 is further provided with a front roller 5 for the drawer rail, which in turn is supported on the central rail 2 with a rear roller. Corresponding and similar guides are known in such extracts and are therefore not explained in detail.

1 to 4, a holder for a molded part 8, 8a, 8b is formed from the front end of the central rail 2, which is no longer required to form a guide rail, by means of a laterally bent flange 6 with an opening 7, which essentially consists of one Counterstop 9, 9a, 9b, a swivel bar 10, 10a, 10b formed on the counterstop 9, 9a, 9b and an eyelet spring 11, 11a, 11b which is attached to the part 9, 9a, 9b at a distance from the swivel bar 10, 10a, 10b there is a receiving recess 12, 12a, 12b is provided at the end near the swivel bolt 10, 10a, 10b.

The body rail 1 carries a pin 13 projecting in the position according to FIGS. 1 and 4 between the receiving recess 12, 12a, 12b and the pivot bolt 10, 10a, 10b, which forms a counter-holder for the pivot bolt 10, 10a, 10b and in the position according to FIG 1 and 4 supports and prestresses the spring 11, 11a, 11b on the receiving recess 12, 12a, 12b.

The pivot bolt 10, 10a, 10b carries on its outside two stop surfaces 14, 14a, 14b and 15, 15a, 15b for the outside and inside of the associated edge of the opening 7. The molded part 8, 8a, 8b can be inserted laterally into the opening 7 are inserted, whereby a clamping effect is exerted on the area lying behind the counter-stop 9, 9a, 9b and the shape of the spring 11, 11a, 11b and its support on the flange 6 ensure that the counter-stop 9, 9a, 9b in any position one, albeit a small distance from the top of the shop rail 3. 1 and 2, a nose 16 is formed, the front and back of which form stop faces for two drivers 17, 18 attached above and above the shutter rail 3 and possibly formed from the upper flange thereof and their stop faces directed towards him. 1 and 2, the spring eyelet 11 is biased in the sense of a reduction in diameter, two spring recesses 20, 21 assigned to the two possible positions of the molded part being provided for the spring end 19, into which the spring end 19 snaps in the respective position.

In the position shown in FIG. 1, the counter-stop 9 and the swivel bolt 10 are held by the above-mentioned latching, the clamping action of the spring eye 11 and possibly also by the clamping action at the edges of the opening 7, so that the swivel bolt 10 engages the central rail 2 fixed to the body rail 1 with the cross pin 13. As soon as the driver 19 strikes the counter-stop 16 when the drawer rail is further pulled out of the position according to FIG. 1, the counter-stop 9 pivots and takes the pivot bolt 10 up to the stop of the stop surface 14 on the inner edge of the opening 7, so that the pivot bolt 10 comes free from the cross pin 13. As shown in FIG. 2, the spring end 19 engages in the recess 20, so that the molded part 8 subsequently assumes the position according to FIG. 2 in which the counter stop 9 lies with its lower edge lower than the apex of the driver 18, so that the side of the nose 16 facing the driver 18 forms a counter-stop for this driver when the drawer rail 3 is inserted.

If the shop track 3, z. B. retracted from the position shown in FIG. 2, the driver 18 presses on the nose 16 and the central rail 2 is taken positively and positively. As soon as the receiving recess 12 strikes the cross pin 13, the spring end 19 is pivoted and is thereby released from the latch 20. Under the spring preload, the latch 10 snaps behind the transverse pin 13 into the position according to FIG. 1 and thereby fixes the middle rail 2 on the body rail 1. This snapping causes the lower edge of the nose 16 to be higher than the driver 18, so that this nose 16 can no longer impede the further insertion of the drawer rail 3 from the position shown in FIG. 1. The molded part 8 now remains in this position until it is again adjusted to the position according to FIG. 2 by the driver 19 (FIG. 1) hitting the nose 16 again.

3 and 4 basically perform the same function as the construction according to FIGS. 1 and 2. In contrast to the former construction partially deviating shapes of the spring eyelets 11 and 11b are provided.

3, the spring eye 11 again forms a spring biased in the sense of a narrowing. The counter-stop 9 is provided with a curved concave recess 22, the edges of which form counter-stop surfaces for a single driver 23 or its two sides. After latching on the pin 13, the latch 10a pivots upward, so that the left edge of the recess 22 no longer impedes the further insertion of the driver 23 and thus the drawer rail 3, but the right edge of the recess 22 continues to act as a stop in the engagement area of the driver 23 remains so that the molded part 8a can be adjusted via the stop 23 in the unlocked position according to FIG. 3.

According to FIG. 4, the counter-stop 9b has a recess 24 here delimited from straight sides with stop surfaces 25, 26 for a driver 27. When the drawer rail 3 is moved from the position according to FIG. 4 to the right, the driver 27 pivots the counter-stop 9b and thus the swivel bolt 10b up to the stop 14b at the opening edge of the flange 6, whereby the cross pin 13 is released and the stop surface 25 is pivoted for the reinsertion of the drawer rail 3 into a position in which it is located in the engagement area on the left side of the driver 27. In the latching position shown in FIG. 4, the driver 27 can pass underneath the stop 25 without hindrance.

In all embodiments, the cross pin 13 can be replaced by another counter-holder, e.g. B. a torn out or molded rag or other molded part from the body rail, as shown in FIGS. 5 and 6 by a rectangular cross-section part 13 a.

The embodiment according to FIGS. 5 and 6 differs from the previous embodiments essentially in that in an attached to the central rail 2 or formed from it Bracket 28 engages a cage 29 formed as a molded part with a foot part 30 and that guide and support parts 31, 32 are then attached to the bracket 28. The cage 29 has a receiving recess 33 for a spring eye 34 of a molded part 8c which has the pivot bolt 10c and which is held captively in the cage 29 by a transverse pin 35. This cross pin 35 engages in an elongated hole 36. On the body rail there is again a driver 37 for counter-stops 38, 39 formed from the molded part 8c. Furthermore, the stop 38 is provided on a nose, which in the rest position according to FIG. 5 engages in a side groove of the part 32.

In the position according to FIG. 5, the latch 10c holds the middle rail 2 on the body rail 1 by engagement with 13a. If the driver 37 hits the stop 39 when the drawer rail is pulled out, the nose 38 disengages from the part 32 and the molded body 8c swivels into the position according to FIG. 6, the bolt 10c releasing the part 13a so that the rail now 2 can be pulled out of the rail 1. A stop knob 40 of the rail 3 acts on the roller 5 and thereby prevents the rail 3 from being pulled out too far. When it is reset, the driver 37 again moves the molded part 8c into the engagement position of the bolt 10c with the part 13a.

An embodiment is also possible in which the drawer rail 3 is coupled to the central rail 2 via corresponding devices, this coupling being released only when the central rail 2 and drawer rail 3 have been fully pulled out of the carcass rail 1, so that the drawer rail 3 can continue to extend from the already extended middle rail. In order to be able to adhere to a defined sequence when retracting, an additional form-fitting coupling can be provided, which fixes the extended central rail in relation to the carcass rail in the fully extended position and which is only released when the drawer rail is fully retracted into the central rail.

Claims (14)

Full extension for drawers with a fixed body rail (1), a middle rail (2) and a drawer rail (3), the middle rail (2) on the body rail (1) and the drawer rail (3) on the middle rail (2) each interacting Rollers (4, 5) and guideways formed from the rails (1 - 3) is guided and the relative extension length of the central rail (2) relative to the carcass rail (1) or the drawer rail (3) relative to the central rail (2) is limited by stops characterized in that for the determination of at least the pull-out sequence on the rails (2, 3) positive coupling elements (8, 10, 13) are provided, which when pulled out in predetermined pull-out positions via stops (17, 18, 23, 27, 37) from a position connecting the middle rail (2) with the body rail (1) or drawer rail (3) can be adjusted to a release position, preferably the middle rail (2) with the drawer rail (3) or body rail ( 1) couple and can be reset when pushed in at the relevant pull-out positions. Full extension according to claim 1, characterized in that the form-fitting coupling elements (8, 10, 13) and / or additional coupling elements when the pull-out is adjusted in the pull-out direction in the pull-out sequence drawer rail (3) - central rail (2) after the coupling of the body rail ( 1) and middle rail (2) the extended drawer rail (3) with the middle rail (2) or when the drawer rail (3) and middle rail (2) are first pulled out of the body rail (1), the extended middle rail (2) with the body rail (1) couple until the corresponding insertion position is reached again. Full extension according to claim 1 or 2, characterized in that a positive coupling element made of a snap or Lock bolt (10, 10a, 10b, 10c), a counter-stop (9, 9a, 9b, 9c) connected to this for actuation and a counter-holder (13, 13a) connected to the rail coupled in the insertion position, and that the stops for the Counter stop (9, 9a, 9b, 9c) consist of drivers (17, 18, 23, 27, 37) attached to the third rail (3). Full extension according to one of claims 1 to 3, characterized in that the snap or drag bolt (10, 10a, 10b, 10c) in its snap-in position, the middle rail (2) on the carcass rail (1) or drawer rail (3) over the with it connected counter-holder (13, 13a) holds, via the driver (17, 18, 23, 27, 37) interacting with the counter-stop (9, 9a, 9b, 9c) in both adjustment directions when releasing from its engagement with the counter-holder and when Pushing back into the engagement position can be reset. Full extension according to claim 4, characterized in that the counter-stop (9, 9a, 9b, 9c) and the driver (17, 18, 23, 27, 37) each have at least two stop surfaces interacting in pairs when the central rail (2) is being pulled out and pushed in and the counter-stop (9, 9a, 9b, 9c) is adjustable with the snap or drag bolt (10, 10a, 10b, 10c) so that the stop surface forming the insertion counter-stop is only in the position releasing the counter-holder (13, 13a) of the snap bolt (10, 10a, 10b, 10c) protrudes into the engagement area of the driver (17, 18, 23, 27, 37). Full extension according to one of claims 1 to 5, characterized in that the counter-stop (9a, 9b, 9c) has a recess (22, 24) facing the upwardly directed driver (23, 27, 37) of the drawer rail (3) for receiving of the driver (23, 27, 37), which determines the stop surfaces (25, 26, 38, 39) provided with longitudinal spacing for the counter-stop (9a, 9b, 9c). Full extension according to one of claims 1 to 6, characterized in that snap locks (10, 10a, 10b, 10c) are designed as spring-loaded swivel locks which can be adjusted between two defined end positions via the catch (17, 18, 23, 27, 37). Full extension according to one of claims 1 to 7, characterized in that the pivot bolt (10, 10a, 10b) with the counter-stop (9, 9a, 9b, 9c) and its actuating spring (11, 11a, 11b, 33) as a molded part (8 , 8a, 8b, 8c), in particular made of plastic, is supported on supports (6) provided on the central rail (2), protrudes from the central rail (2) in the assembly position with the counterstop and down to the drawer or Body rail (1, 3) and the movement path of the driver (17, 18, 23, 27, 37) is directed. Full extension according to one of claims 1 to 8, characterized in that the two snap positions of the pivot bolt (10, 10, 10b, 10c) by means of interacting catches and counter-catches (19, 20, 21, 32, 38) and stops (14, 14a, 14b, 15, 15a, 15b) are determined. Full extension according to claim 9, characterized in that the pivot bolt (10, 10a) with a z. B. is connected to an eyelet-shaped spring (11, 11a), in which the end lying at a gap (19) of the spring biased in the sense of reducing the diameter of the eyelet forms a latching projection, which is assigned to it in the two snap positions, from the Spring-formed locking recesses (20, 21) snap into place. Full extension according to one of claims 1 to 10, characterized in that for the swivel bolt (10c) or the molded part (8c) having the swivel bolt (10c), a guide cage (29) which can be latched into holders (28) of the rail (2) assigned to it. is provided, which the the snap positions of the bolt (10c) determining pegs (32). Full extension according to claim 11, characterized in that the pivot bolt (10c) or molded part (8c) in the cage (29) via a z. B. as an elongated pin connection (35, 36) formed connection is movable, but captive. Full extension according to claims 1 to 10, characterized in that the pivot bolt (10, 10a, 10b) has two outwardly directed stops (14, 14a, 14b, 15, 15a, 15b) assigned to the two snap positions for the outer and inner edge the opening (7) of a support flange (6) formed from the central rail (2). Full extension according to one of claims 1 to 13, characterized in that the counter-holder (13, 13a) is designed as a part attached to the carcass rail (1), the rear side of which, pointing away from the pull-out end of the rail, for engagement with the swivel latch (10, 10a , 10b, 10c) and on the opposite side of which the spring (11, 11a, 11b, 34) forming a shaped eyelet is supported in the blocking position with a receiving recess (12, 12a, 12b) under pretension, this spring (11, 11a, 11b, 34) relaxes after loosening the bolt (10, 10a, 10b, 10c) when the middle rail (2) is pulled out, so that the counter-stop (9, 9a, 9b, 9c) in the position corresponding to the release position of the bolt remains until the receiving recess (12, 12a, 12b) hits the counter-holder (13, 13a) again when the drawer rail (2) is retracted.

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