EP3735860A1 - Drawer slide guide - Google Patents

Abstract

A drawer extension runner (4), comprising: - a carcass rail (5) to be fastened to a furniture carcass (2), - at least one fastening section (12a), via which the carcass rail (5) is to be fastened to the furniture carcass (2), the at least one Fastening section (12a) has a vertical limb (13) for resting on the furniture body (2) and a transverse limb (14) protruding from the vertical limb (13), the transverse limb (14) of the fastening section (12a) having one in a longitudinal direction (L) of the Body rail (5) is connected to the body rail (5) running web (18), - at least one pull-out rail (7) which is mounted relative to the body rail (5) in the longitudinal direction (L), - at least one between the body rail (5) and rolling elements (21a, 21b, 21c) arranged on the pull-out rail (7), which can be supported on a catwalk (22a, 22b, 22c, 22d) of the body rail (5) and / or the at least one pull-out rail (7), the web (18) the cabinet rail (5) has a first web section (18a) and at least one second web section (18b), the first web section (18a) being connected to the transverse leg (14) of the fastening section (12a) and that the second web section (18b) is subjected to a load of the pull-out rail (7) is tiltable or bendable about an axis running in the longitudinal direction (L) in the direction of the transverse web (14) so that a change in the relative position between the catwalk (22a, 22b, 22c, caused by a load on the pull-out rail (7)) 22d) and rolling elements (21a, 21b, 21c) transversely to the longitudinal direction (L) can be at least partially compensated.

Description

• eine an einem Möbelkorpus zu befestigende Korpusschiene,
• zumindest einen Befestigungsabschnitt, über welchen die Korpusschiene am Möbelkorpus zu befestigen ist, wobei der zumindest eine Befestigungsabschnitt einen Vertikalschenkel zur Anlage am Möbelkorpus und einen vom Vertikalschenkel abstehenden Querschenkel aufweist, wobei der Querschenkel des Befestigungsabschnitts mit einem in einer Längsrichtung der Korpusschiene verlaufenden Steg der Korpusschiene verbunden ist,
• zumindest eine Ausziehschiene, welche relativ zur Korpusschiene in Längsrichtung verschiebbar gelagert ist,
• zumindest einen zwischen der Korpusschiene und der Ausziehschiene angeordneten Wälzkörper, welcher an einem Laufsteg der Korpusschiene und/oder an einem Laufsteg der zumindest einen Ausziehschiene abstützbar ist.

The present invention relates to a drawer extension slide comprising:

• a cabinet rail to be attached to a furniture cabinet,
• at least one fastening section via which the carcass rail is to be fastened to the furniture carcass, the at least one fastening section having a vertical limb for contact with the furniture carcass and a transverse limb protruding from the vertical limb, the transverse limb of the fastening section being connected to a web of the carcass rail running in a longitudinal direction of the carcass rail is
• at least one pull-out rail, which is mounted so as to be displaceable in the longitudinal direction relative to the body rail,
• at least one rolling element arranged between the carcass rail and the pull-out rail, which can be supported on a catwalk of the carcass rail and / or on a catwalk of the at least one pull-out rail.

Pull-out drawer guides are usually attached to opposite side walls of a furniture body and enable the drawer to run with little friction, especially when the load is high. If the bottom of the drawer is heavily loaded by stored items, the problem often arises that this load causes the pull-out rail to move relative to the carcass rail and thus also to those rolling elements which are mounted for load transfer between the carcass rail and the pull-out rail Longitudinal axis tilted. If the pull-out rail also has a support for a drawer bottom, the lateral tilting moment on the pull-out rail is additionally caused by the loading of the drawer reinforced. This tilting of the pull-out rail leads to premature and uneven wear of the rolling elements, so that the functionality of the drawer pull-out guide is adversely affected.

The object of the present invention is therefore to provide a drawer extension guide of the type mentioned at the beginning while avoiding the above disadvantage.

According to the invention, this is achieved by the features of claim 1. Further advantageous configurations of the invention are specified in the dependent subclaims.

According to the invention it is therefore provided that the web of the body rail has a first web section and at least one second web section, the first web section being connected to the transverse leg of the fastening section and that the second web section is caused by a load on the pull-out rail about an axis running in the longitudinal direction Direction of the transverse web is tiltable or bendable, so that a change in the relative position between the runway and the rolling element caused by a load on the pull-out rail can be at least partially compensated for transversely to the longitudinal direction.

In other words, a compensation device is provided, by means of which the body rail can be tilted or bent relative to the transverse leg of the fastening section in the event of a static or dynamic load on the pull-out rail about an axis running in the longitudinal direction of the drawer pull-out guide. In this way it is achieved that the walkway and the roller body rest against each other largely without tilting regardless of the loading state of the drawer, ie that despite the load, a walking surface of the roller body and the walkway interacting therewith are always aligned parallel to one another.

The first web section and the second web section can be spaced apart from one another in the height direction in the assembled state. Alternatively, it is also possible for the second web section to protrude transversely from the first web section in the assembled state. It can be provided that the second web section of the body rail is spaced apart from the transverse leg of the fastening section, preferably parallel or transversely, in an unloaded state of the drawer extension guide, forming a gap.

In an unloaded state of the pull-out rail, the catwalk and the at least one rolling element assume a zero position to one another; in the event of a deviation from said zero position caused by a load on the pull-out rail, a restoring force can be exerted on the body rail in the direction of the zero position by arranging an energy store . The energy storage device can be formed either by a mechanical spring element, by an elastically flexible plastic material and / or by the body rail's inherent elasticity.

Fig. 1

ein Möbel mit Schubladen, welche über Schubladenausziehführungen relativ zu einem Möbelkorpus verfahrbar gelagert sind,

Fig. 2

die Schubladenausziehführung in einer perspektivischen Ansicht,

Fig. 3

die unbelastete Schubladenausziehführung in einem Querschnitt,

Fig. 4

die durch Staugut belastete Schubladenausziehführung in einem Querschnitt,

Fig. 5a, 5b

vereinfachte Darstellungen des unbelasteten und des belasteten Zustandes der Schubladenausziehführung,

Fig. 6

Teile der Schubladenausziehführung in einer perspektivischen Ansicht.

Further details and advantages of the invention emerge from the following description of the figures. It shows or shows:

Fig. 1

a piece of furniture with drawers which are mounted so that they can be moved relative to a furniture body via drawer extension guides,

Fig. 2

the drawer extension guide in a perspective view,

Fig. 3

the unloaded drawer extension guide in a cross section,

Fig. 4

a cross-section of the drawer pull-out slide loaded by stowed goods,

Figures 5a, 5b

simplified representations of the unloaded and loaded condition of the drawer extension guide,

Fig. 6

Parts of the drawer extension runner in a perspective view.

Fig. 1 shows a piece of furniture 1 with a plurality of drawers 3 which are mounted so as to be movable in the longitudinal direction (L) relative to a cabinet-shaped furniture body 2 via drawer extension guides 4. The drawer extension guides 4 each have a carcass rail 5 to be fastened to the furniture carcass 2, a pull-out rail 7 to be fastened to the drawer 3 and, if necessary, a central rail 6 that can be moved between the carcass rail 5 and the pull-out rail 7. At least one fastening section 12a is connected to the carcass rail 5, through which the drawer extension guide 4 is to be fastened to the furniture carcass 2. In the exemplary embodiment shown, two fastening sections 12a, 12b which are separate from one another are provided, which are spaced apart from one another in the longitudinal direction (L). The length of the fastening sections 12a, 12b can only extend over a partial area, preferably over less than a quarter, of the length of the body rail 5. The drawers 3 each include a front panel 8, a drawer bottom 9, side walls 10 and a rear wall 11. The side wall 10 is fixed, ie axially immovably connected to the pull-out rail 7, so that the side wall 10 together with the pull-out rail when the drawer 3 moves 7 is movable. Loads on the pull-out rail 7 running transversely to the longitudinal direction (L) are problematic, as a result of which it is bent about an axis running in the longitudinal direction (L) and tilted in the direction of the arrow (M). This lateral tilting of the pull-out rail 7 can lead to one-sided loading or to the breakage of rolling elements 21a, 21b, 21c ( Fig. 3 ), which are mounted between the body rail 5 and the central rail 6 and / or between the central rail 6 and the pull-out rail 7.

Fig. 2 shows the drawer extension slide 4 in a perspective view. The at least one fastening section 12a has a vertical leg 13 with bores 17 for attachment to the furniture carcass 2 and a transverse limb 14 protruding from the vertical limb 13, preferably at right angles, the transverse limb 14 of the fastening section 12a being connected to a web 18 of the carcass rail 5 running in a longitudinal direction (L) of the carcass rail 5. In the exemplary embodiment shown, the pull-out rail 7 is connected to a support rail 20 to be attached to the drawer 3, preferably pre-assembled on the drawer 3, which in the assembled state is axially immovable relative to the pull-out rail 7. The connection between the pull-out rail 7 and the carrier rail 20 can take place via a coupling device known per se, so that the carrier rail 20 (and thus the entire drawer 3) can be detachably coupled to the pull-out rail 7. The support rail 20 comprises a support 15 for the drawer bottom 9, the support 15 in the exemplary embodiment shown being designed as a horizontal web with several tabs 16 spaced apart from one another in the longitudinal direction (L), which can be pressed against the underside of the drawer bottom 9 and thus the drawer bottom 9 is non-positive is fixable.

Fig. 3 shows the unloaded drawer extension guide 4 in a cross section. The fastening section 12a has a vertical leg 13 for resting on the furniture body 2 and a transverse leg 14 protruding from the vertical leg 13 at an angle of 90 °. The body rail 5 comprises an essentially C-shaped section with a web 18 running in a longitudinal direction (L), which has a first web section 18a connected to the transverse leg 14 and a second web section 18b connected to the first web section 18a, the second web section 18b is spaced apart from the transverse leg 14 of the fastening section 12a, forming a gap 19. The first web section 18a and the second web section 18b can be spaced apart from one another in the assembled state in the height direction, for example parallel. Alternatively, however, it is also possible for the second web section 18b to protrude transversely from the first web section 18a in the assembled state. The (hatched) Middle rail 6 is mounted displaceably relative to the body rail 5 via at least one rolling element 21a, wherein the rolling element 21a can be supported and / or rolled on a first runway 22a of the carcass rail 5 and on a second runway 22b of the middle rail 6. The center rail 6 has a vertically running side web 6a arranged laterally next to the support 15 and a horizontally running transverse web 6b connected to the side web 6a, the transverse web 6b protruding at least in sections under the support 15 for the drawer bottom 9. Due to the transverse web 6b of the center rail 6 located below the support 15, the weight of the drawer 3 in the assembly position can be introduced into the center rail 6 with a smaller lateral effective distance, which - especially when the drawer 3 is heavily loaded - exerts a lower tilting moment on the drawer extension guide 4 becomes. The pull-out rail 7 is relative to the central rail by a second rolling element 21b, which can be rolled along a catwalk 22c of the center rail 6, and a third rolling element 21c, which can be supported on the one hand on the catwalk 22c of the center rail 6 and on the other hand along a catwalk 22d of the pull-out rail 7 6 slidably mounted. The rolling elements 21a, 21b, 21c can each be arranged in a carriage which is movably supported between the body rail 5 and the central rail 6 and / or between the central rail 6 and the pull-out rail 7.

Fig. 4 shows the loaded drawer extension guide 4 in a cross section. As a result of the loading of the drawer bottom 9 with stowed items, the transverse leg 14 of the fastening section 12a bends downward and now assumes an angle of 93 ° relative to the vertical leg 13, for example. The first web section 18a is connected to the transverse leg 14 of the fastening section 12a, the second web section 18b, however, is tilted or bent by the load on the pull-out rail 7 about an axis running in the longitudinal direction (L) in the direction of the transverse web 14, so that a load of the Pull-out rail 7 caused a change in the relative position between the catwalks 22a, 22b, 22c, 22d and the rolling elements 21a, 21b, 21c can be at least partially compensated transversely to the longitudinal direction (L). In this way - despite a downward bending of the transverse leg 14 - a relative position, seen in cross section, between the body rail 5, the center rail 6, the pull-out rail 7 and the support rail 20 and a relative position between the rolling elements 21a, 21b, 21c and the associated Catwalks 22a, 22b, 22c, 22d not changed. The rolling elements 21a, 21b, 21c are evenly loaded despite an additional loading of the drawer 3 with stowed goods and are therefore not exposed to one-sided loads which can lead to irregular wear or breakage of the rolling elements 21a, 21b, 21c.

Figure 5a shows a simplified representation of the unloaded state of the drawer extension guide 4, which according to the figure Fig. 3 corresponds. The first web section 18a of the carcass rail 5 is connected to the transverse leg 14 of the fastening section 12a, the second web section 18b of the carcass rail 5 is spaced apart, preferably essentially parallel, relative to the transverse leg 14, forming the gap 19. When the drawer 3 is loaded, the second web section 18b is tilted or bent in the direction of the transverse leg 14, whereby the gap 19 located between the transverse leg 14 and the second web section 18b is reduced ( Figure 5b , corresponds to the figure Fig. 4 ). Loading with stowed goods only changes the position of the second web section 18b relative to the transverse leg 14, but the relative position of the rails to one another (and thus that of the rolling elements 21a, 21b, 21c and the walkways 22a, 22b, 22c, 22d to one another) is changed maintained.

Fig. 6 shows the fastening section 12a and the carcass rail 5 in two different perspective views. The first web section 18a of the body rail 5 is connected to the transverse leg 14 of the fastening section 12a via at least one fastening point 23a. In the exemplary embodiment shown, the first web section 18a is at least two in Fastening points 23a, 23b spaced apart from one another in the longitudinal direction (L) are connected to the transverse leg 14, which can be done for example by welding, in particular laser welding. In this way, the body rail 5 can be bent or tilted around the longitudinal axis (L) relative to the transverse leg 14 of the fastening section 12a. The fastening point 23a and / or the fastening point 23b can be designed either as a point support or also as a line support, the line support extending at least in sections in the longitudinal direction (L). The first web section 18a can also be connected to the transverse leg 14 via at least one joint (for example via a film hinge or a point hinge) so that the second web section 18b can be tilted about the longitudinal axis (L) via this joint. In addition, supports 24a and 24b, preferably in the form of cambered elevations, are provided, on which the first web section 18a of the body rail 5 rests loosely, whereby the body rail 5 can be tilted more easily about the longitudinal axis (L). Alternatively, the body rail 5 can also be welded to the supports 24a, 24b, so that the first web section 18a is connected to the transverse leg 14 via at least two welds spaced apart transversely to the longitudinal direction (L). The first web section 18a and the second web section 18b can extend essentially over the entire length of the body rail 5, wherein a width of the second web section 18b measured transversely to the longitudinal direction (L) can be at least twice as wide as the first web section 18a. The first web section 18a and the second web section 18b are, as can be seen from the two views of the carcass rail 5 shown, connected to one another via a crank 25 of the carcass rail 5 running in the longitudinal direction (L).

Claims (13)

Drawer extension slide (4), comprising: - a body rail (5) to be attached to a furniture body (2), - At least one fastening section (12a) via which the body rail (5) is to be fastened to the furniture body (2), the at least one fastening section (12a) having a vertical leg (13) for contact with the furniture body (2) and one of the vertical leg (13) ) has protruding transverse limbs (14), the transverse limb (14) of the fastening section (12a) being connected to a web (18) of the carcass rail (5) running in a longitudinal direction (L) of the carcass rail (5), - At least one pull-out rail (7) which is mounted so as to be displaceable in the longitudinal direction (L) relative to the body rail (5), - At least one rolling element (21a, 21b, 21c) arranged between the carcass rail (5) and the pull-out rail (7), which is attached to a walkway (22a, 22b, 22c, 22d) of the carcass rail (5) and / or the at least one pull-out rail (7) can be supported,
characterized in that the web (18) of the carcass rail (5) has a first web section (18a) and at least one second web section (18b), the first web section (18a) being connected to the transverse leg (14) of the fastening section (12a) and that the second web section (18b) can be tilted or bent by loading the pull-out rail (7) about an axis running in the longitudinal direction (L) in the direction of the transverse web (14), so that a change in the pull-out rail (7) caused by a load on the pull-out rail (7) relative position between the catwalk (22a, 22b, 22c, 22d) and rolling elements (21a, 21b, 21c) transversely to the longitudinal direction (L) can be at least partially compensated. Pull-out drawer slide according to claim 1, characterized in that the first web section (18a) and the second web section (18b) are in the Installation state are spaced apart from one another in the vertical direction or that the second web section (18b) protrudes transversely from the first web section (18a) in the installed state. Pull-out drawer slide according to claim 1 or 2, characterized in that the first web section (18a) and / or the second web section (18b) extends or extend essentially over the entire length of the body rail (5). Pull-out drawer slide according to one of Claims 1 to 3, characterized in that the first web section (18a) of the body rail (5) is connected, preferably welded, to the transverse leg (14) of the fastening section (12a) via at least one fastening point (23a, 23b) . Pull-out drawer slide according to one of Claims 1 to 4, characterized in that the second web section (18b) of the body rail (5) in an unloaded state of the slide-out drawer slide (4) with the formation of a gap (19) from the transverse leg (14) of the fastening section (12a) is spaced. Extending drawer slide according to one of Claims 1 to 5, characterized in that the second web section (18b) is arranged closer to the vertical limb (13) than the first web section (18a). Pull-out drawer slide according to one of Claims 1 to 6, characterized in that a width of the second web section (18b) measured transversely to the longitudinal direction (L) is at least twice as wide as the first web section (18a). Pull-out drawer slide according to one of Claims 1 to 7, characterized in that the body rail (5) has at least two Fastening sections (12a, 12b) spaced apart from one another in the longitudinal direction (L) are to be fastened to the furniture body (2). Drawer extension guide according to one of Claims 1 to 8, characterized in that the drawer extension guide (4) has a support (15) for mounting a drawer bottom (9). A drawer extension runner according to one of claims 1 to 9, characterized in that the drawer extension runner (4) has a central rail (6) which is movably mounted between the body rail (5) and the pull-out rail (7). Pull-out drawer slide according to claim 10, characterized in that the middle rail (6) has a side web (6a) arranged laterally next to the support (15) and a cross web (6b) connected to the side web (6a) which, in the assembled position, is at least partially below the support (15) protrudes for the drawer bottom (9). Pull-out drawer slide according to claim 11, characterized in that the side web (6a) runs essentially vertically in the assembly position and / or that the transverse web (6b) runs essentially horizontally in the assembly position. Drawer (3) with at least one drawer extension slide (4) according to one of Claims 1 to 12.

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