EP0367274B1 - Simplified double-extensible guide - Google Patents

Abstract

In order to improve an extensible guide for extensions being extendible from a body having two guide rails guided displaceably on each other in the direction of extension, of which the outer guide rail surrounds the inner guide rail in a C-shape and of which the inner guide rail can be fixedly connected either to the extension or to the body, in such a way that a double extension can be achieved with the most simple and inexpensive means, it is proposed that the outer guide rail is guided displaceably parallel to the direction of extension at at least two points arranged at a distance from each other by at least one holding piece, that the holding piece can be fixedly connected to the body or the extension, that the outer guide rail is guided by the holding piece on its top side and underside, that stop elements are provided which interact with the outer guide rail and with the holding piece, and that displacement of the outer guide rail relative to the holding piece is possible from an end position of insertion. <IMAGE>

Description

The invention relates to a pull-out guide for pull-outs from a body, with two mutually slidably guided in the pull-out guide rails, of which the outer overlaps the inner C-shaped and of which the inner is either connected to the pull-out or the body.

Such pull-out guides have been known for a long time. In these, the two guide rails are preferably guided displaceably against one another by means of roller bodies mounted in a roller body cage.

However, these pull-out guides have the disadvantage that when the inner guide rail is firmly held on the pull-out or on the body and the outer guide rail is firmly held on the body or pull-out, the pull-out cannot be completely pulled out of the body, since the rolling body cage has a length that cannot be neglected which the two guide rails must still be arranged overlapping in their extended position.

It is known to make such pull-out guides a full pull-out version by mounting the outer guide rail again in a guide rail by means of rolling elements and thus achieving full pull-out by a total of three guide rails.

However, this solution is disadvantageous because it is very expensive and expensive.

The invention is therefore based on the object of improving a pull-out guide of the type described at the outset in such a way that full pull-out can be achieved with the simplest and cheapest possible means.

This object is achieved in that the outer guide rail is displaceably guided at least two points apart from one another by at least one holding piece parallel to the pull-out direction, that the holding piece can be firmly connected to the body or the pull-out, that the outer guide rail is held by the holding piece its top and bottom is guided that with the outer guide rail with the holding piece cooperating stop elements are provided and that the stop elements are arranged so that they move the outer guide rail relative to the holding piece from an insertion end position, in which the extract fully into the Body is pushed in, allow in a pull-out end position in which the pull-out is fully pulled out of the body when the guide rails are pulled out to the maximum.

The joke of the invention is thus to be seen in the fact that, unlike the known full extension rails, a further guide rail is provided, but that one only starts from two slidably guided guide rails and only the outer guide rail is in turn slidably supported in a holding piece, which at the same time serves to fasten the entire pull-out guide to the part to which the inner guide rail is not fastened .

In the context of the present invention, it is provided in principle that the holding piece supports the outer guide rail at two points arranged at a distance from one another. As an alternative to this, however, it is also advantageous, in particular for reasons of simplicity, if the outer guide rail is supported at each of the two spaced-apart locations by a respective holding piece, ie a total of two holding pieces.

In general, it is conceivable within the scope of the present invention that the outer guide rail is indirect, i.e. via intermediate links, supported by the holding piece. However, a particularly simple solution is one in which the holding piece supports the outer guide rail directly on its top and bottom.

In order to ensure, in particular, an easy displacement of the outer guide rail in the holding piece and to prevent it from becoming jammed in the holding piece, it is provided that the holding piece rests on the upper and lower side of the outer guide rail, with upper and lower supporting surfaces curved in the pull-out direction has, so that on the top and bottom of the outer guide rail the support surfaces are essentially only linear and thus jamming is prevented.

It is particularly advantageous here if the support surfaces have an apex and if the apices of the upper and lower support elements each lie on a perpendicular which is at right angles to the direction of extension, i.e. are not offset from each other. With this arrangement, jamming of the outer guide rail in the holding pieces can be prevented particularly advantageously. With regard to the design of the support elements, no further details have been given above. In order in particular to facilitate reaching the insertion end position, it has proven to be advantageous if the lower support surface is formed by a roller, so that when the pull-out is pushed in in the last piece before reaching the insertion end position, in which the outer guide rail essentially extends from the lower one Support elements is worn, the outer guide rail can slide easily in the holding piece.

Very easy sliding of the guide rail in the holding piece is achieved, however, if at least the rear upper support surface of the holding piece is also formed by a roller, since this will support the guide rail in the extended position of the pull-out.

With regard to the arrangement of the rollers, it has also proven to be advantageous if the roller has an axis of rotation which intersects the perpendicular through the vertices of the support surfaces.

In a simplified embodiment of the solution according to the invention, however, it is also sufficient if the support surfaces are sliding surfaces, that is to say that the support surfaces consist of a good fit on the outer guide rail sliding material, preferably a plastic material, are formed.

According to the exemplary embodiments described above, the support elements should primarily support the outer guide rail upwards and downwards. However, it is far more advantageous if the holding pieces have a support surface which is adapted to a cross section of the top and bottom of the outer guide rail, so that they also serve as side guides for the outer guide rail and thus guide them on all sides.

With regard to the holding pieces, too, it has proven to be advantageous if they are made of plastic, in particular elastic plastic, since these can then be produced very simply and inexpensively.

A cost-effective solution also comes about if the two holding pieces assigned to the outer guide rail are of identical design, so that only one type of holding piece has to be produced.

As previously described, the solution according to the invention can be used with all types of pull-out guides. However, one embodiment of the solution according to the invention offers particular advantages in which the holding piece can be fastened to the body via a spacer and in which the spacer holds the holding piece at a distance from the body. This solution is intended for pull-out guides with concealed guide rails, that is to say, guide rails which are arranged in a cavity in a side wall of a pull-out. In these, the inner guide rail is preferably firmly connected to the respective extension and holders are generally required, to connect the concealed outer guide rail to the body. In the present case, the holders which are required anyway can thus be replaced by the holding pieces according to the invention, so that full extension can be achieved at the same time and thus the costs of this exemplary embodiment of the solution according to the invention rise only insignificantly above the costs of a pull-out guide with concealed guide rails according to the prior art.

Further cost advantages arise when the spacers are integrally formed on the holding pieces.

As an alternative to the solution in which the outer guide rail is connected to the body via the holding piece or the holding pieces, it is also conceivable that the holding piece is part of a side wall of the pull-out, and thus the inner guide rail is connected to the body while the Holding piece as part of the side wall of the pull-out is displaceable relative to the outer guide rail. This solution can also be advantageously integrated into drawers with concealed guide rails.

It is particularly expedient if the holding piece is integrally formed on the side wall, i.e. is an integral part of the side wall, in a particularly preferred solution a bottom of the pull-out piece is integrally formed on the side wall, so that the bottom side wall and holding piece are a one-piece and inexpensive to manufacture Represent part.

As an alternative to the solutions presented so far, in which the outer guide rail directly from the holding piece is supported, it is also conceivable that the pull-out guide is provided with at least one slide.

In this embodiment, it is provided that the holding piece has a slideway for the slider.

In general, it is particularly advantageous if the holding piece forms a longitudinal member for the pull-out, so that this longitudinal member is already part of the pull-out and a relatively simple structural solution for the pull-out is possible.

Particularly advantageous constructions can be achieved if the longitudinal member covers the inner and outer guide rails, it being even more favorable if the longitudinal member encompasses the inner and outer guide rails.

In the latter case, it has proven to be advantageous to be able to hold the inner guide rail appropriately if the longitudinal member has a laterally arranged slot through which a holding bracket carrying the inner guide rail passes.

As already explained in the context of the basic concept of the solution according to the invention, it is necessary to provide stop elements.

It is particularly expedient here if one of the stop elements is arranged on the holding piece.

In order to prevent a disturbing impact from occurring when the stop elements come into contact with the holding pieces, it has proven expedient if the holding piece has a shock-absorbing stop element.

Such a holding piece can be realized particularly easily if the stop element comprises elastic segments.

The simplest way of realizing such elastic segments is to design them as a curved piece.

In particular, if the holding piece is made of plastic, it is expedient for manufacturing reasons if the stop element is integrally formed on the holding piece, so that the entire part can then be produced particularly simply and inexpensively.

In the cases in which the holding piece is designed as a longitudinal member, it has proven to be advantageous if the longitudinal member is provided with a stop element. The longitudinal member is preferably designed such that it comprises a movable tongue with an abutment surface, the latter protruding spring-loaded into an interior thereof.

When installing the pull-out guide according to the invention with the necessary stop elements, problems can arise when attaching the holding pieces to the outer guide rail in the correct relation to the stop elements. For this reason, a solution has proven to be advantageous in which the outer guide rail has a front stop cooperating in the inserted end position with the stop body of the front holding piece and a rear stop interacting in the extended end position with the stop body of the rear holding piece, so that the holding pieces, for example, after the Attach one stop can be pushed onto the outer guide rail and then the other stop is brought into position.

The pull-out guide according to the invention is particularly easy to handle when a rear stop can be moved out of a position interacting with the stop body against the force of a spring element. In the simplest case, the rear stop is a nose held on the spring element and projecting beyond the outer guide rail.

In order not to have to manually hold the cam against the force of the spring element when inserting the outer guide rail into the already mounted holding piece, it is expediently provided that the nose has an insertion slope that decreases in the direction of insertion towards the guide rail, so that only the outer guide rail into the already assembled holding piece must be inserted.

In the simplest case, it is provided that the spring element is a leaf spring.

In the case of the concealed guide rails in particular, it has proven to be expedient if the inner guide rail has hanging tabs for pulling out.

In the context of the solution according to the invention, an advantageous exemplary embodiment provides that a front holding piece carries a front support for the front pull-out, which can be attached without great additional costs and thus shows all the advantages in this regard, in particular in the case of guide rails which are connected to one another in the insertion end position Rolling bodies standing approximately in the middle of the guide rail are mounted.

This front support is preferably arranged such that it projects from the holding piece on a side facing away from the body.

It is preferably provided that the front support is a projection formed in the area of the lower support element, which can then easily reach under the pull-out.

With regard to the type of front support, several options are conceivable. For example, in the case of pull-out guides which are to run as easily as possible into the insertion end position, it is advantageous if the front support has a support surface which runs essentially parallel to the pull-out direction, so that no force is required to make the front support effective.

However, if the force only plays a subordinate role when the insertion end position is reached, it is advantageous if the front support has a support surface which rises in the insertion direction, on which the pull-out can then slide and which thus fully supports the extension in the insertion end position.

In the exemplary embodiments described so far, in particular in the exemplary embodiment in which the lower support elements are designed at least as rollers, it is appropriate for the front holding piece to have a pull-in element by means of which the pull-out can detect a pull-in distance before the end of insertion position and acted upon by a force component of a spring is displaceable into the insertion end position. Such an automatic pull-in is, if possible, desirable for all pull-out guides and can be implemented very inexpensively in connection with the solution according to the invention.

It is advantageously provided in detail that the pull-in element is a swivel lever on which the spring engages in such a way that it moves from the end of insertion position against a first force component to a dead center, in which it experiences no force component in one direction of movement, and from this with the participation of a second force component in a pull-out position and vice versa and that the pivot lever is coupled during this movement with the movement of the pull-out via a cooperating connecting member.

It is particularly advantageous if a pivoting range from the dead center to the end of insertion position is substantially larger than a pivoting range from the dead center to the pull-out position, in particular if the latter is so close to the dead center that the pivot lever in the pull-out position still remains securely in this position.

The connection between the pivot lever and the pull-out can be realized particularly easily if the pivot lever has a fork into which the connecting element can be inserted, so that the connecting element interacts with the pivot lever over the draw-in distance, but the remaining pull-out distance without interaction with the pivot lever can drive through.

In the simplest case it is provided that the connecting member is a cam that can be inserted into the fork.

Fig. 1

eine perspektivische Gesamtdarstellung eines ersten Ausführungsbeispiels der erfindungsgemäßen Auszugführung in Einschiebeendstellung;

Fig. 2

eine perspektivische Darstellung des ersten Ausführungsbeispiels in Auszugendstellung;

Fig. 3

eine vergrößerte ausschnittsweise Seitenansicht des ersten Ausführungsbeispiels in der Einschiebeendstellung gemäß Fig. 1;

Fig. 4

einen Schnitt längs Linie 4-4 in Fig. 3;

Fig. 5

eine Seitenansicht eines erfindungsgemäßen Haltestücks des ersten Ausführungsbeispiels;

Fig. 6

einen Schnitt längs Linie 6-6 in Fig. 5 mit gleichzeitiger Darstellung eines Schnitts durch die Führungsschienen und teilweise durch den Auszug sowie den Korpus;

Fig. 7

eine Seitenansicht des vorderen Haltestücks gemäß einem zweiten Ausführungsbeispiel;

Fig. 8

einen Schnitt durch Fig. 7 ähnlich Fig. 6;

Fig. 9

eine ausschnittsweise Seitenansicht ähnlich Fig. 3 eines dritten Ausführungsbeispiels;

Fig. 9a

einen Schnitt längs Linie 9a-9a in Fig. 9;

Fig. 10

einen Schnitt ähnlich Fig. 6 durch das dritte Ausführungsbeispiel;

Fig. 11

einen Schnitt längs Linie 11-11 in Fig. 10;

Fig. 12

eine Seitenansicht ähnlich Fig. 9 einer Variante des dritten Ausführungsbeispiels;

Fig. 13

einen Schnitt ähnlich Fig. 10 durch die Variante des dritten Ausführungsbeispiels gemäß Fig. 12;

Fig. 14

einen Schnitt ähnlich Fig. 6 durch ein viertes Ausführungsbeispiel und

Fig. 15

eine Seitenansicht ähnlich Fig. 3 des vierten Ausführungsbeispiels.

Advantages of the invention are explained in the description below and in the drawing of some exemplary embodiments. The drawing shows:

Fig. 1

an overall perspective view of a first embodiment of the pull-out guide according to the invention in the insertion end position;

Fig. 2

a perspective view of the first embodiment in the extended position;

Fig. 3

an enlarged fragmentary side view of the first embodiment in the insertion end position shown in FIG. 1;

Fig. 4

a section along line 4-4 in Fig. 3;

Fig. 5

a side view of a holding piece according to the invention of the first embodiment;

Fig. 6

a section along line 6-6 in Figure 5 with a simultaneous representation of a section through the guide rails and partially through the extension and the body.

Fig. 7

a side view of the front holding piece according to a second embodiment;

Fig. 8

a section through FIG. 7 similar to FIG. 6;

Fig. 9

a partial side view similar to Figure 3 of a third embodiment.

Fig. 9a

a section along line 9a-9a in Fig. 9;

Fig. 10

a section similar to Figure 6 through the third embodiment.

Fig. 11

a section along line 11-11 in Fig. 10;

Fig. 12

a side view similar to Figure 9 of a variant of the third embodiment.

Fig. 13

a section similar to Figure 10 through the variant of the third embodiment of FIG. 12.

Fig. 14

a section similar to FIG. 6 through a fourth embodiment and

Fig. 15

a side view similar to FIG. 3 of the fourth embodiment.

A first embodiment of a pull-out guide according to the invention, shown as a whole in FIG. 1 in the insertion end position and in FIG. 2 in the extension end position, comprises an outer guide rail 10 which is essentially C-shaped and an upper leg 12, a central web 14 and a lower one Leg 16 has. The outer guide rail 10 overlaps with its upper leg 12 and its lower leg 16 an inner guide rail, designated as a whole by 18, essentially C-shaped, the inner guide rail 18 also being essentially C-shaped and an upper leg 20, a central web 22 and a lower leg 24. Both guide rails 10 and 18 are guided against one another in the pull-out direction 26, the outer leg 12 being between the upper leg Guide rail 10 and the upper leg 20 of the inner guide rail 18 and the lower leg 16 of the outer guide rail 10 and the lower leg 24 of the inner guide rail 18 are each provided in a rolling element cage 28 arranged rolling elements 30. The outer guide rail 10 is also slidably held in the pull-out direction 26 in a front holding piece 32 and in a rear holding piece 34, the holding pieces 32, 34 likewise overlapping the outer guide rail 10 essentially in a C-shape and preferably in the area of the upper leg 12 and hold lower leg 16.

Both holding pieces 32, 34 are each held by a spacer 36, 38 at a distance from a side wall 40 of a body designated 42 as a whole. The spacers 36, 38 are preferably screwed onto the side wall 40.

As shown in FIGS. 3 and 4 on an enlarged scale, the outer guide rail 10 is provided with a front stop 44 and a rear stop 46, the front stop 44 being bent out of the central web 14 of the outer guide rail 10 in the direction of the side wall 40 Lobe is, while the rear stop 46 comprises a leaf spring 48, on which a nose 50 projecting in the direction of the side wall 40 is formed, which extends through the central web 14 of the guide rail 10 in the region of an opening 52. The leaf spring 48 rests on the side of the central web 14 facing the inner guide rail 18 and extends from a rear end 54 of the outer guide rail 10 in the pull-out direction 26. The leaf spring 48 is at its one front end 56 of the outer guide rail 10 facing end region 58 is held clamped on its top and bottom by a tab 60 bent out of the central web 14. To improve the spring action, a constriction 62 is provided between the end region 58 and the nose 50, so that the elasticity of the leaf spring 48 is improved by a reduced width. Furthermore, a handle bracket 64, which adjoins the nose 50 and extends in the direction of the inner guide rail 18, is provided for actuating the rear stop 46. By pulling this handle bar 64 in a direction perpendicular to the side wall 40 and pointing away from it, the nose 50 can thus be moved through the opening 52 so that the outer guide rail 10 can be pulled out through the holding pieces 34 and 32 in the pull-out direction 26 . In order to facilitate the insertion of the outer guide rail 10 during assembly, an insertion bevel 66 which decreases with increasing extension opposite to the pull-out direction 26 towards the central web 14 and extends through the opening 52 is provided in connection with the nose, which slide in when the outer guide rail 10 is inserted the nose 50 is moved in the direction of the opening 52 by the holding pieces 32 and 34.

In order to avoid a hard impact when reaching the push-in end position or the pull-out end position, in which either the stop 44 or the stop 46 runs against the front holding piece 32 or the rear holding piece 34, the holding pieces 32, 34 are both on a middle piece 68 on its front side as well as on its rear side, a stop body designated as a whole with 70 is provided, which has an end stop 72 that bulges outward semicircularly away from the respective center piece 68 and a distance 72 over this end stop bulging arc segment 74 comprises of elastic material, so that when the stop 44 or the stop 46 starts against such a stop body 70, the resilient arc segment 74 is first acted upon, which then dampens the stop and springs until it is pressed against the end stop 72 .

The holding pieces 32, 34 are preferably made of plastic and the stop bodies 70 are integrally molded onto them.

In the extended end position, shown in Fig. 2, the outer guide rail 10 is displaced relative to the holding pieces 32 and 34 so far forward in the pull-out direction 26 that it projects beyond a front edge 76 of the body, the length by which the outer guide rail 10 protrudes beyond the front edge 76, at least corresponds to the length of the rolling element cage 28, so that in the extended end position the inner guide rail 18 is not pulled out of the body 42 over its entire length. A pull-out 78 firmly connected to the inner guide rail 18 thus lies with a rear wall 80 of the same in front of the front edge 76, so that the pull-out guide 78 according to the invention allows the pull-out 78 to be pulled out completely from the body 42.

The holding pieces 32, 34 of the pull-out guide according to the invention are preferably constructed identically, so that only the holding piece 32 is described in detail in FIGS. 5 and 6. This includes the middle piece 68, which is aligned parallel to the middle web 14. The upper leg 12 is overlapped by an upper support element 82 which is integrally formed on the middle piece 68 and has a support surface 84 which has a cross section a curvature of the upper leg 12 of the outer guide rail 10 is adapted, while the support surface 84 in the pull-out direction 26 and opposite thereto in the insertion direction symmetrically to a perpendicular to the pull-out direction 26 perpendicular to the upper leg 12 away from the upper leg 12, so that one of of the perpendicular perpendicular 86 cut and extending perpendicular to the pulling direction 26 vertex 88, in the area of which the upper leg 12 abuts the support member 82.

A lower support element 90 opposite the upper support element 82 is designed as a roller, the turning axis 92 of which extends transversely to the pull-out direction 26 and is cut by the perpendicular perpendicular 86. The roller 90 has a radius which is smaller than a radius of curvature of the support surface 84. The roller 90 preferably has a width which corresponds approximately to a width of the lower leg 16, so that the latter can be fully supported on the roller 90. For this purpose, a lateral surface 94 of the roller 90 is also adapted to the outer curvature of the lower leg 16 and is preferably hyperpoloid-shaped.

The roller 90 is supported by a pin 96 which passes through a lower region of the middle piece 68, which in turn has a recess 98 for receiving the roller 90. To secure the lower leg 16, a web 100 is formed on the lower region of the middle piece 68 on a side of the roller 90 facing away from the side wall 40, which web prevents the lower leg 16 from escaping in the direction away from the side wall 40.

In addition, a projection 102 is provided on the lower region of the middle piece 68 on the side of the roller facing away from the side wall 40 and carries a support surface 104 which serves to support the front of the pull-out 78 in the insertion end position.

In the exemplary embodiment described as an example, the spacer 36, which lies between the middle piece 68 and the side wall 40, is integrally formed on the middle piece 68, so that preferably the holding piece 32 together with the stop body 70, the spacer 36 and the projection 102 is in one piece and only the roller 90 with the pin supporting it is to be inserted, the pin preferably only having to be inserted into a bore 106 in the lower region of the center piece. The pin 96 is preferably oriented such that the axis of rotation 92 formed thereby is perpendicular to the side wall 40 and the holding piece 32 is preferably oriented so that it guides the outer guide rail 10 with its central web 14 aligned parallel to the side edge 40.

The pull-out 78 used in connection with the first exemplary embodiment is preferably a metal drawer with an inverted U-shaped side wall 108, which forms a cavity 110 in which the guide rails 10, 18 and the holding pieces 32, 34 are essentially invisible are arranged. An outer part 112 of the side wall 108 overlaps the holding pieces 32, 34 and is drawn down between them and the side wall 40 of the body 42 almost to the spacers 36, 38.

The pull-out 78 is preferably fastened to the inner guide rail 18 via tabs 114 which are bent out in a hook shape from the central web 22 of the inner guide rail 18 and which engage in recesses in support webs 116, which are preferably molded onto a bottom part 118 of the pull-out 78.

For front support, a run-on block 120 is preferably attached to the bottom part 118, which in the end of insertion position is seated on the support surface 104 of the front holding piece 32. For this purpose, the support surface 104 is preferably designed such that it extends in the direction of insertion, i.e. opposite to the pull-out direction 26, rises to allow sliding of the run-on block 120 shortly before the end of insertion position.

In a second exemplary embodiment, shown in FIGS. 7 and 8, the same reference numerals are used to the extent that identical parts are used with the first exemplary embodiment. In this regard, reference is made to the description of the first exemplary embodiment.

In contrast to the second exemplary embodiment, the front holding piece 32 is provided with a pull-in element, designated as a whole as 122, which sits on the upper support element 82. This pull-in element 122 comprises a pivot lever 124 which has two arms 126 which are arranged at a distance from one another. This pivot lever 124 carries a fork 128 at its upper end. Between the arms 126 there are two bolts 130, 132 connecting them and arranged at a distance from one another, the lower bolt 130 being rotatably mounted in a semicircular depression 134 in the upper support element 82, so that an axis of rotation of the same intersects the perpendicular perpendicular 86. The upper bolt 132 interacts with a spring 136 extending between arms 126, the spring 136 essentially having the shape of a flat, downwardly open clip and both opening-forming ends 138 of this clip being held in a form-fitting manner on the support element 82, for example.

The bolt 132 bears against an inner side 140 of the clasp 136, which is able to deflect upwards away from the support element 82 and thus exert a force on the bolt 132 in the direction of the support element 82.

At the same time, the clasp 136 serves as a support for the fork 128, both in the insertion end position, as shown on the right half in FIG. 7, and in the pull-out position, as shown on the left half in FIG. 7. The pivot lever 124 is shaped such that a connecting plane 142 passing through the axes of the bolts 130 and 132 includes a large angle with the central perpendicular 86 in the insertion end position, while the connecting plane 142 forms a small angle with the central perpendicular 86 in the extended position of the pivot lever 124 includes. Furthermore, the clip 136 is shaped so that in a position of the pivot lever 124, in which the connecting plane 142 coincides with the perpendicular perpendicular 86, neither a force component is exerted on the pivot lever 124 in the direction of the pull-out position, nor in the direction of the insertion end position, so that this Position corresponds to a dead center of a movement of the pivot lever 124 between the extended position and the insertion end position. The fact that there is therefore a very small angle between the connecting plane 142 and the perpendicular bisector 86 in the extended position, thus means that in this position the pivot lever 124 is only moved by a small pivoting range beyond the dead center, while in the insertion end position it is a large pivoting range away from the dead center.

The side wall 108 is now shaped such that it forms an upper, narrow, inverted U-shaped region 144 with a corresponding narrow cavity 146, in which the fork 128 engages. The interaction between the side wall 108 and the fork 128 takes place through two round pins 148 passing through this cavity 146 and forming a cam, which are arranged with respect to the fork 128 in such a way that they move when the carrier 78 moves in the direction of insertion, ie opposite to the direction of extension 26. retract a draw-in distance before the end of insertion position into the fork which is in the pull-out position and which is open towards the front, then pivot the swivel lever 124 together with the fork 128 until the connecting plane 142 coincides with the central perpendicular 86. For this purpose, a force in the direction of insertion is required to overcome a second force component caused by the spring force of the clasp 136. After the dead center of the movement of the pivot lever 124 has been exceeded, the force of the clip 136 pressing on the bolt 132 in the direction of the support element 82 acts on the pivot lever 124, which tends to pivot it into the end of insertion position, so that consequently the fork 128 acts on the round pins 148 and thereby moves the insert 78 into the insertion position and keeps it spring-loaded. When pulling out the pull-out 78, the swivel lever 124 is moved in the opposite direction by applying a force to and beyond the dead center, so that it remains in the extended position and the extension 78 can be fully extended without interaction with the pivot lever 124.

Advantageously, in this embodiment, the support surface 104 'is not rising, but is formed parallel to the pull-out direction 26.

In a third exemplary embodiment, shown in FIGS. 9 and 10, the parts identical to the first exemplary embodiment are provided with the same reference numerals, so that reference can be made to the explanations for the first exemplary embodiment with regard to their description.

In contrast to the first exemplary embodiment, the inner guide rail 18 is held on the side wall 40 of the body designated 42 as a whole by means of a U-shaped bracket 150.

In contrast, the outer guide rail 10 is connected to the pull-out designated 78 as a whole, a side wall 152 of the pull-out 78 in turn forming the holding piece 150 which is supported on the outer guide rail 10.

For this purpose, the side wall is provided with a bracket designated as a whole with 156, which has a horizontal web 158 and a vertical web 160, the horizontal web 158 resting on the upper leg 12 of the outer guide rail 10 and the vertical web 160 on the central web 14 the outer guide rail 10 rests. The bracket 156 preferably extends substantially over the entire length of the outer guide rail 10.

In order to achieve a form-fitting gripping of the outer guide rail 10, the holding bracket 156 is additionally provided with two securing tabs 162 which are arranged at a distance from one another and which extend from the vertical web 160 and extend parallel to the horizontal web 158 and on the lower leg 16 of the outer guide rail 10 issue. In addition, starting from the horizontal web 158, securing tabs 164 also extend in the direction of the vertical web 160, which overlap the upper leg 12 of the outer guide rail 10 on its outer edge 166 facing away from the central web 14 and thus hold the central web 14 against the horizontal web 158.

The stop elements are formed by an expression 168 on the central web 14 of the outer guide rail 10, which is arched in the direction of the horizontal web 158. The expression is arranged at a distance from the snap-in tongue 170 of the side wall 152 by the displacement path between the insertion end position and the extension end position. In order to allow movement of the pull-out 78 relative to the outer guide rail 10 from the insertion end position into the pull-out end position and vice versa, the vertical web 160 is provided with a groove 172 which extends from the relative position of the expression 168 in the insertion end position essentially up to the snap tongue extends and with a groove end wall 174 forms a stop for the expression 168 in the insertion end position.

The snap tongue 170 is preferably aligned and arranged in the continuation of the vertical web 160 and in the same plane as this, and preferably by one Slot 176 separated from them. The snap tongue 170 comprises a stop surface 178 lying in a plane perpendicular to the pull-out direction 26 as well as an inlet slope 180 arranged opposite the stop surface opposite to the pull-out direction 26, with which the snap tongue 170 can be moved away from the central web 40 in order to be able to slide the pull-out 78 with the To allow the holding piece 154 to slide the snap tongue 170 opposite the extension 168 opposite the extension 168, the snap tongue 170, if it lies behind the extension 168 opposite the extension direction 26, being resiliently aligned parallel to the web 160 and in contact with the central bridge 14 of the outer guide rail is held so that the stop surface 178 runs during the relative movement of the holding piece 154 and thus of the pull-out 78 relative to the outer guide rail 12 from the insertion end position into the pull-out end position against the expression 168 and, when in contact therewith, the extension end position defined. The shape 168 is preferably also provided with a stop surface 182 facing the stop surface 178 and extending parallel to it.

In order to achieve damping when the abutment surface 178 counteracts the abutment surface 182, the snap tongue is provided at a distance from the abutment surface 178 with a slot 184 which extends parallel to the abutment surface 178 and which leads to the formation of a strip area 186 lying between the abutment surface 178 which can be moved elastically opposite to the pull-out direction 26 when the snap tongue 170 as a whole is made of elastic material and thus allows the stop surface 178 to elastically retract.

In order to additionally fix the pull-out 78 in the end-of-insertion position and a retraction to reach the end-of-insertion position, one of the securing tabs 162, as shown in FIG. 11, is provided with a protuberance 188 which extends in the direction of the U-shaped bracket 150 protrudes and interacts with a bump 190 also arranged on the bracket 150. The bumps 188 and 190 are both preferably curved toward one another and are arranged such that the bump 188 in the insertion end position, as shown in FIG. 11, stands behind the bump 190 and abuts against it.

In order to allow elastic extension of the cusp 188, the securing tab 162 is designed such that a slot 192 is provided in the area of the cusp 188 and at a distance therefrom, so that a narrow strip of the securing tab remains between this slot 192 and the cusp, which, when the securing tab 162 itself is made of elastic material, allows the cusp 188 to move elastically away from the cusp 190 and thus allows the cusp 188 to slide away over the cusp 190.

In the exemplary embodiment shown in FIGS. 9 to 11 and described above, the holding piece 154 is preferably produced as a whole from elastic material and, in a particularly preferred embodiment, is integrally formed on the side wall 152. The invention has proven particularly useful in the case of a plastic drawer or a plastic pull-out made from conventionally known plastic materials, in which the side wall 152 is likewise an integral part of the same and is produced in one piece therewith.

In a fourth exemplary embodiment of the solution according to the invention, shown in FIG. 12, those parts which are identical to those of the first and third exemplary embodiments are provided with the same reference numerals, so that reference can be made to the explanations for these exemplary embodiments with regard to their description.

In contrast to the third exemplary embodiment, the horizontal holding bracket 156 is replaced by two or more rollers 194 with which, as shown in FIG. 13, the side wall 152 rests on the upper leg 12 of the outer guide rail 10. The rollers 194 are preferably mounted on the side wall 152 by roller bolts 196. Through these free-running rollers 194 it is achieved that these rollers instead of the horizontal web 158 comprehensive holding piece 154 'slides more easily on the outer guide rail 10 and thus a displacement of the same from the insertion end position into the pull-out position and vice versa is possible with less effort.

As an alternative to the provision of rollers 194, it is also conceivable to use balls mounted in correspondingly shaped recesses, which in turn then rest on the upper leg 12 of the outer guide rail 10 and also allow the holding piece 154 'to slide. In a particularly preferred embodiment, it can also be provided that the securing tabs 162 rest against balls on the lower legs of the outer guide rail 10 and thus the holding piece 154 'both on the upper leg 12 and on the lower leg 16 of the outer guide rail 10 via rolling elements is supported and is thus kept slightly sliding.

In a fifth exemplary embodiment, shown in FIGS. 14 and 15, those parts, insofar as they are identical to those of the previous exemplary embodiments, are provided with the same reference numerals, so that reference can be made to the explanations for these exemplary embodiments with regard to their description.

As in the third and fourth exemplary embodiments, the inner guide rail 18 is connected to the side wall 40 of the body designated as a whole by 42 via a holding bracket 200 and is held firmly thereon. In the same way, the outer guide rail 10 as a whole is displaceable relative to a holding piece designated 202. This holding piece 202 is a hollow profile rail which essentially encompasses both the inner guide rail 18 and the outer guide rail 10 and has a slot 204 through which the holding bracket 200 extending from the side wall 40 to the inner guide rail 18 extends. The slot 204 preferably extends over the entire length of the holding piece 202.

The holding piece 202 expediently forms a longitudinal member for the pull-out 78, a pull-out insert 206 being fastened via connecting elements 208 which engage in a longitudinal groove 210 of the holding piece 202, which preferably extends over the entire length thereof and widens with increasing groove depth, so that the connecting element 208 is held in a form-fitting manner in the longitudinal groove 210.

The displaceability of the holding piece 202 relative to the outer guide rail 10 is ensured by at least two sliders 212, which are fixed, that is held stationary on the outer guide rail 10, overlap the central web 14 and the upper leg 12 and the lower leg 16 of these and for immovable fixing in the longitudinal direction of the outer guide rail 10 with projections 214 in bores 216 in Engage the center web 14 of the outer guide rail.

The sliding pieces 212 are in turn provided with sliding surfaces 218, 220 which are arranged at a distance from the upper leg 12 and the lower leg 16 and which, as can be seen from FIG. 15, are curved in the pull-out direction.

With these sliding surfaces 218 and 220, the sliders 212 slide in slideways 222 and 224 of the holding piece 202, which are each arranged at a distance from the upper leg 12 and the lower leg 16 of the outer guide rail 10 and facing them inside the holding piece 212. The slideways 222 and 224 are designed so that the sliders 212 are not only supported in the vertical direction, but also a lateral guide, i.e. in a horizontal direction.

In the preferred exemplary embodiment, the slideways 222 and 224 are arranged opposite the longitudinal grooves 210 in the interior of the holding piece 202 and are curved in cross section with a central piece 222a or 224a in the direction of the outer guide rail 10 and are provided laterally with essentially perpendicular side guide surfaces 222b and 224b , so that the sliders 212 are supported between these side guide surfaces 222b and 224b with corresponding side sliding surfaces 218b and 220b, while the sliders 212 are in the vertical direction with concave sliding surface pieces 218a and 220a rest on the corresponding convex counterparts 222a and 224a.

The end of insertion position is determined by a stop tab 226, which projects in the direction of one of the sliding pieces 212 from the holding piece 202 serving as a longitudinal beam and comes to bear against the respective sliding piece 212. Furthermore, in order to fix the pull-out end position, a stop cam 228 projecting in the direction of one of the sliding pieces 212 is also arranged resiliently on the holding piece 202, which preferably has an inlet slope 230, so that the cam 228 when the holding piece 202 is pushed onto the sliding pieces 212 in each case due to its spring-elastic fastening in each case can be moved away from the sliders 212 and can thus be pushed over them, while when the holding piece 202 is moved from the insertion end position to the extension end position, the cams 228 run against a corresponding surface of the respective slider 212 with a stop surface 232 running perpendicular to the pull-out direction 26 and therefore not is movable over this.

As an alternative to the exemplary embodiment shown in FIGS. 14 and 15, it can also be provided in a further exemplary embodiment, not shown in the drawing, that the sliding pieces 212 are arranged in a stationary manner on the holding piece 202 and thus act in the same way as the support elements 82 and 90 of the first exemplary embodiment , so that the same function as in the first embodiment is achieved.

Claims (44)

1. Extensible slide means for elements (78) withdrawable from a housing (42), comprising two guide rails (10, 18) guided on one another for displacement in withdrawal direction, the outer rail (10) engaging around the inner rail (18) in a C-shape and the inner rail (18) being securely connectable to either the withdrawable element (78) or the housing (42), characterized in that the outer guide rail (10) is guided at at least two places arranged in spaced relation to one another by at least one holding member (32, 34, 154, 202) for displacement parallel to the withdrawal direction (26), that the holding member (32, 34, 154, 202) is securely connected to the housing (42) or the withdrawable element (78), that the outer guide rail (10) is guided on its upper and lower sides (12, 16) by the holding member (32, 34, 154, 202), that stop elements (44, 46, 168, 170 212, 228) interacting with the outer guide rail (10) and with the holding member (32, 34, 154, 202) are provided and that the stop elements (44, 46, 168, 170, 212, 228) are arranged such that they permit displacement of the outer guide rail (10) relative to the holding member (32, 34, 154, 202) from a pushed-in end position, in which the withdrawable element (78) is fully inserted into the housing (42), into a drawn-out end position, in which the withdrawable element (78) is drawn completely out of the housing (42) with the guide rails (10, 18) extended to their maximum.
2. Extensible slide means as defined in claim 1, characterized in that at least two holding members (32, 34) are provided for each of the outer guide rails (10).
3. Extensible slide means as defined in claim 1 or 2, characterized in that the holding member (32, 34, 154) supports the outer guide rail (10) directly on its upper and lower sides.
4. Extensible slide means as defined in any of the preceding claims, characterized in that the holding member (32, 34) has upper and lower support surfaces (84, 94) resting on the upper and lower sides (12, 16) of the outer guide rail (10) and being spherically curved in withdrawal direction (26).
5. Extensible slide means as defined in claim 4, characterized in that the support surfaces (84, 94) have an apex (88) and that the apices (88) of the upper and lower support surfaces (84, 94) are each located on a perpendicular line (86) extending at right angles to the withdrawal direction (26).
6. Extensible slide means as defined in claim 4 or 5, characterized in that the lower support surface (94) is formed by a roller (90).
7. Extensible slide means as defined in any of claims 4 to 6, characterized in that the upper support surface (82) is formed by a roller (194).
8. Extensible slide means as defined in claim 5 or 6, characterized in that the roller (90) has an axis of rotation (92) intersecting the perpendicular line (86) through the apices (88) of the support surfaces (84).
9. Extensible slide means as defined in claim 4 or 5, characterized in that the support surfaces (84, 94) are sliding surfaces.
10. Extensible slide means as defined in any of the preceding claims, characterized in that the holding member (32, 34, 154, 202) has a support surface (84, 94) adapted to a cross section of the upper and lower sides (12, 16) of the outer guide rail (10).
11. Extensible slide means as defined in any of the preceding claims, characterized in that the holding member (32, 34) is made of a plastics material, in particular resilient plastics.
12. Extensible slide means as defined in any of claims 2 to 11, characterized in that the two holding members (32, 34) associated with the outer guide rail (10) are of identical design.
13. Extensible slide means as defined in any of the preceding claims, characterized in that the holding member (32, 34) is attachable to the housing (42) via a spacer member (36, 38) and that the spacer member (36, 38) holds the holding member (32, 34) at a distance from the housing (42).
14. Extensible slide means as defined in claim 13, characterized in that the spacer member (36, 38) is integrally formed onto the holding member (32, 34).
15. Extensible slide means as defined in any of claims 1 to 12, characterized in that the holding member is part of a side wall of the withdrawable element.
16. Extensible slide means as defined in claim 15, characterized in that the holding member is integrally formed onto the side wall.
17. Extensible slide means as defined in any of the preceding claims, characterized in that the outer guide rail is provided with at least one sliding member (212).
18. Extensible slide means as defined in claim 17, characterized in that the holding member has a slide path (222, 224) for the sliding member (212).
19. Extensible slide means as defined in any of the preceding claims, characterized in that the holding member (202) forms a longitudinal carrier for the withdrawable element.
20. Extensible slide means as defined in claim 19, characterized in that the longitudinal carrier (202) covers the inner (18) and the outer guide rail (10).
21. Extensible slide means as defined in claim 16, characterized in that the longitudinal carrier (202) engages around the inner (18) and the outer guide rail (10).
22. Extensible slide means as defined in claim 20 or 21, characterized in that the longitudinal carrier (202) has a laterally arranged slot (204), an angle bracket (200) bearing the inner guide rail (18) engaging through said slot.
23. Extensible slide means as defined in any of the preceding claims, characterized in that one of the stop elements (70, 170, 228) is arranged on the holding member (32, 34, 154, 202).
24. Extensible slide means as defined in claim 23, characterized in that the holding member (32, 34, 154) has a shock-absorbing stop element (70, 170).
25. Extensible slide means as defined in claim 24, characterized in that the stop element (70, 170) comprises an elastic segment (74, 186).
26. Extensible slide means as defined in claim 25, characterized in that the elastic segment (74) is an arc-shaped member.
27. Extensible slide means as defined in any of claims 24 to 26, characterized in that the stop elements (70, 170) are integrally formed onto the holding members (32, 34, 154).
28. Extensible slide means as defined in any of claims 17 to 27, characterized in that the longitudinal carrier (202) is provided with a stop element (228).
29. Extensible slide means as defined in claim 28, characterized in that the longitudinal carrier (202) comprises a movable tongue with a stop surface (232), the latter being acted upon by a spring to protrude into an interior of said carrier.
30. Extensible slide means as defined in any of the preceding claims, characterized in that the outer guide rail (10) has a front stop (44) interacting in the pushed-in end position with the stop element (70) of a front holding member (32) and a rear stop (46) interacting in the drawn-out end position with the stop element (70) of the rear holding member (34).
31. Extensible slide means as defined in any of the preceding claims, characterized in that a rear stop (46) is movable out of its position interacting with the stop element (70) contrary to the force of a spring element (48).
32. Extensible slide means as defined in claim 31, characterized in that the rear stop (46) comprises a nose (50) held on the spring element and protruding beyond the outer guide rail (10).
33. Extensible slide means as defined in claim 32, characterized in that the nose (50) has an inclined insert surface (66) decreasing in the push-in direction towards the guide rail (10).
34. Extensible slide means as defined in any of claims 31 to 33, characterized in that the spring element is a leaf spring (48).
35. Extensible slide means as defined in any of the preceding claims, characterized in that the inner guide rail (18) has suspension lugs (114) for the withdrawable element (78).
36. Extensible slide means as defined in any of the preceding claims, characterized in that the holding member (32) bears a front support (102) for the withdrawable element (78).
37. Extensible slide means as defined in claim 36, characterized in that the front support (102) projects from the holding member (32) on a side facing away from the housing (42).
38. Extensible slide means as defined in claim 36 or 37, characterized in that the front support is a projection (102) integrally formed in the region of the lower support element (90).
39. Extensible slide means as defined in any of claims 36 to 38, characterized in that the front support (102) has a support surface (104') extending essentially parallel to the withdrawal direction (26).
40. Extensible slide means as defined in any of claims 36 to 39, characterized in that the front support (102) has a support surface (104) inclined upwards in the push-in direction.
41. Extensible slide means as defined in any of the preceding claims, characterized in that one of the holding members (32) has a draw-in element (122) for engaging the withdrawable element (78) a draw-in distance in front of the pushed-in end position, said withdrawable element being acted upon by a force component of a spring (136) to displace it into the pushed-in end position.
42. Extensible slide means as defined in claim 41, characterized in that the draw-in element (122) is a rocking lever (124), the spring (136) engaging thereon such that said lever is movable from the pushed-in end position contrary to a first force component to a dead center and from there into a drawn-out position with the aid of a second force component, and vice versa, and that the rocking lever (124) is coupled during this movement to the movement of the withdrawable element (78) via a connecting member (14) interacting therewith.
43. Extensible slide means as defined in claim 42, characterized in that the rocking lever (124) has a fork (128), the connecting member (148) being insertable into said fork.
44. Extensible slide means as defined in claim 43, characterized in that the connecting member is a cam (148) insertable into the fork (128).

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