EP0525153B1 - Sliding guide-rail system for drawers - Google Patents

Abstract

PCT No. PCT/AT92/00017 Sec. 371 Date Oct. 8, 1992 Sec. 102(e) Date Oct. 8, 1992 PCT Filed Feb. 11, 1992 PCT Pub. No. WO92/13473 PCT Pub. Date Aug. 20, 1992.An extension guide assembly for use on a side of a drawer to guide movement of the drawer into and out of a furniture body includes a support rail to be attached to the furniture body, an extension rail to be attached to the drawer, and a central rail between the extension rail and the support rail. The central rail has a U-shaped transverse profile opening downwardly, and carriages are positioned within the profile of the central rail and support rolling bodies transferring the load of the drawer from the central rail to the support rail. Guide members or runners are disposed on top of the central rail between the central rail and the extension rail. The extension rail has a downwardly open U-shaped transverse cross section including an upper horizontal leg above the guide members, lateral vertical legs extending downwardly from opposite sides of the upper horizontal leg along respective sides of the guide members, and a lower horizontal leg extending from one of the vertical legs to a position beneath each guide member. Thereby the extension rail and drawer are prevented from being lifted from the guide members and the central rail.

Description

The invention relates to a pull-in guide for drawers with a pull-out rail fastened to the drawer, a mounting rail fastened to the furniture body and a central rail running between these two rails on each side of the drawer, carriages being provided which hold the load-transmitting rolling elements and the central rails a lower one Have a U-profile, in which the rollers are guided in the carriages that transfer the drawer load from the center rails to the mounting rails.

So-called single pull-outs are known, which have only one drawer-side pull-out rail and a body-side mounting rail on each side of the drawer, as well as full pull-outs of the type mentioned in the introduction, in which a further central rail is arranged on each side of the drawer between the pull-out rail and the mounting rail. A drawer provided with a single pull-out can largely not be completely pulled out of the furniture body if it is to remain anchored in it. The full extensions are more expensive to construct, but allow the drawer to be pulled out completely, which gives better access to objects located at the rear end of the drawer.

Furthermore, pull-out guides are differentiated according to the type of storage of the rollers. There are pull-out guides in which the load-bearing rollers are mounted on the rails by means of axles, and there are pull-out guides in which the rollers but also balls in their own carriages between the rails are stored. In the latter case, the rollers or balls run differently between the rails.

A full extension is known from DE-A1 26 13 775, in which rollers mounted on the central rail as well as rollers located in cages between the rails, which are not supported on any of the rails, are used. The roller mounted on the rail has the function of a driving roller, which is intended to ensure that the rails are moved synchronously and so the inner rail and the central rail simultaneously reach the fully inserted position.

Experience has shown that even drawers that are fully extended are usually not completely pulled out of the furniture body. This possibility should only exist in principle.

The object of the invention is to provide a pull-out guide which combines the two systems in an improved manner, so that an easy change from single pull-out to full pull-out is possible.

The solution to this problem is according to the invention in that slides for the load transmission from the pull-out rails to the middle rails are arranged on the middle rails and the pull-out rails have a U-profile with an additional lower horizontal web which engages under the sliders and a lift-off device for the drawer forms.

It is advantageously provided that the sliders, which are accommodated in the pull-out rails, are narrower than the pull-out rails are and allow a lateral displacement of the pull-out rails.

One embodiment provides that the pull-out rails are part of a double-walled drawer frame and are integrally formed on the inner wall of the drawer frame.

In order to prevent the drawer from tipping over, it is advantageously provided that the distance between the rollers or sliders from one another is greater than half the length of the pull-out rails.

Another embodiment provides that the drawer frame has a wide area below the pull-out rail and that the central rail is accommodated in this wide area. The middle rail is completely covered by the drawer frame.

Another embodiment of the invention provides that at least one carriage is guided between the sliders on the central rails, the diameter of the rollers mounted therein being greater than the height of the sliders, and a driver is provided between the central rails and the extending rails.

The pull-out guide according to the invention in turn works as a single pull-out in the rear area. The middle rails are held on the pull-out rails and a relative movement only occurs between the middle rails and the mounting rails.

In order to increase the operational safety of such a pull-out guide and to ensure that a closed drawer is not accidentally caused by vibrations od. Like. Is opened and that in the first phase of the pull-out the middle rails are moved with the pull-out rails, it is provided that a brake is arranged on the mounting rails at the front and rear, which resiliently attached a pin or the like on the central rails hold and that a coupling is provided between the middle rails and the pull-out rails.

It is advantageously provided that the brakes are formed by fork-like parts resilient in a horizontal plane with two prongs, one of which is rigid and the other is arranged resiliently. Such brakes take up little space in height and can be installed in a space-saving manner in a pull-out guide set located below the drawer bottom.

Further features of the invention are the subject of the remaining dependent claims.

Exemplary embodiments of the invention are described in detail below with reference to the figures in the accompanying drawings.

1 and 2 each show a cross section through a drawer frame and a pull-out guide on one side of the drawer, FIG. 3 shows a diagram of the middle rail with gliders and carriages, FIG. 4 shows a vertical section through the pull-out rail and the middle rail in Area of the front slide, FIG. 5 shows a diagram of a further exemplary embodiment of a pull-out guide according to the invention, again only the parts arranged on one side of the drawer being shown, FIG. 6 shows an end view of the pull-out guide, FIG. 7 shows a vertical section by a cutout of a pull-out rail and a central rail in the area of a slide, FIG. 8 shows a plan view of the body-side Carrier rail and the middle rail with the drawer pulled out, FIG. 9 shows a plan view of the carrier rail and the middle rail with the drawer pushed into the furniture body, FIG. 10 shows a schematically held section through a further exemplary embodiment of a pull-out guide according to the invention in the region of one side of the drawer 11 shows a side view of a pull-out guide according to the invention, partly in section, in the closed state, FIG. 12 shows the same side view of the pull-out guide according to the invention in the fully extended state, FIG. 13 shows the same side view of the pull-out guide according to the invention in the semi-extended state, 14 shows a cross section through a pull-out guide in the corner area of a wooden drawer, FIG. 15 shows a cross section through the pull-out guide according to the invention in the corner area of an aluminum frame and FIG. 16 shows a side view of the lock according to the invention.

1 shows a drawer with an aluminum frame.

The drawer bottom bears the reference number 3. The pull-out rail 5 is molded directly onto the drawer frame 1. The drawer frame 1 has an inner wall 1 'and an outer wall 1''. The pull-out rail 5 is located below the walls 1 ', 1'', where it is delimited by an upper horizontal web 4', a lower horizontal web 4 and lateral vertical webs 8. The middle rail 2 is received by the pull-out rail 5 and at least partially covered.

The middle rail 2 has a U-profile which is open at the bottom and which is half covered by a lower horizontal web 2 '.

The mounting rails have the reference number 6.

Between the center rails 2 and the support rails 6 there is a carriage 7 in which load-bearing rollers or balls are mounted.

Two sliders 17 are mounted on the middle rail 2.

One slider 17 is fixed to the front end of the middle rail 2, the other slider 17 is located in the rear third of the middle rail 2.

The pull-out rails 5 have a U-profile with a small lower horizontal web 4 which engages under the sliders 17.

There is a distance a between the sliders 17 and the inner vertical web 8 of the drawer, which enables lateral compensation for the slider 17 and thus lateral adjustment of the drawer.

In the exemplary embodiment, the central rail 2 is encompassed on both sides by the slider 17, which has webs 17 'which lie between the central rail 2 and the two vertical webs 8 of the pull-out rail 5 and fully enclose the central rail 2.

The rear slider 17 is provided with a knob 13 which projects into a recess 14 in the pull-out rail 5.

If the drawer is pulled out on the furniture body, the middle rails 2 move with the pull-out rails 5, since they are held by the knobs 13. Only when the middle rails 2 have reached their front stop are the pull-out rails 5 moved relative to the middle rails 2. The pull-out rails 5 can be moved over the knobs 13 with little effort. This is further supported by the fact that the drawers tilt slightly at the front when extending.

A carriage 9 is mounted on the middle rail 2 between the two sliders 17. In the carriage 9, which runs between the pull-out rail 5 and the middle rail 2, there are roller-shaped rollers 10 mounted in series. The carriage 9 has vertical webs 11 on both sides of the middle rail 2 by means of which it is guided on the middle rail 2. A tab is punched out of the upper horizontal web 2 ″ of the center rail 2, which serves as a stop 12 for the carriage 9 and limits the travel path of the carriage 9.

The embodiment according to FIG. 2 shows the same pull-out guide set mounted on a wooden drawer, where it is located below the drawer bottom 3 in the corner, which is delimited by the drawer frame 1 and the drawer bottom 3. The pull-out rail 5 is fastened directly to the drawer frame 1 by means of a web 5 '.

Since the diameter of the rollers 10 is slightly larger than the height h of the slider 17, the pull-out rail 5 moves on the rollers 10 and the sliders 17 serve only as a safety catch or as a tipping protection for the pull-out rails 5 and thus for the drawer. On this type is achieved in that the pull-out guide set is very easy to operate.

In the exemplary embodiment according to FIGS. 5 to 9, a brake 15, 16 is arranged on the carrier rail 6, namely on its lower horizontal web 6 ', at the front and rear. The brakes 15, 16 are plate-shaped and preferably made of plastic material. They are fork-shaped and each have a fixed tine 19 and an elastic spring tine 20.

The rear brake 16 has a front oblique stop edge 21 and a rear edge which, when the center rail 2 is retracted and the pin 22 of the center rail 2 is held by the brake 16, runs approximately parallel to the vertical web 6 ″ of the mounting rail 6 or is slightly tilted backwards.

The brake 16 brakes the central rail 2 on the one hand if it is inserted into the furniture body with too much force and on the other hand prevents the central rail 2 from being extended unintentionally.

The front brake 15 is provided on its resilient web 20 with two oblique run-up edges 23 and a notch 18.

If the center rail 2 is brought into its front end position or approximately into its front end position, the pin 22 of the center rail 2 engages in the notch 18. As a result, the middle rail 2 is held even when a slight pressure is exerted to the rear, ie in the closing direction. This is particularly important when the drawer is on the middle rails 2 should be anchored. The drawer can be placed on the middle rails 2 and moved along these until a locking device snaps shut. Only then is a stronger force exerted on the central rails 2 in the closing direction, which causes the pin 22 to disengage from the notch 18, as a result of which the central rails 2 move freely to the rear.

As can be seen from FIG. 5, at least the front slider 17 is undercut by a lower horizontal web 4 of the pull-out rail 5, so that the drawer is secured against being lifted off.

Since, as already mentioned, the rollers 10 in the carriage 9 are much smoother. H. exert less friction than the sliders 17, when the drawer is pulled out of the furniture, the middle rail 2 with the pull-out rail 5 is first pulled out of the furniture body, i. H. moved along the mounting rail 6.

In this situation, the pull-out guide according to the invention functions like a so-called single pull-out, i.e. H. there is a relative movement only between two rails of the middle rail 2 and the support rail 6.

When the middle rail 2 has reached the front stop on the mounting rail 6, its further movement is inhibited, while the pull-out rail 5 is moved along the middle rail 2 until it is fully extendable. The pull-out guide according to the invention is thus a real full extension, in which the drawer can be pulled out of the furniture body entirely while it remains anchored in the pull-out guide. On the other hand, the invention works Pull-out guide in a first area like a so-called single pull-out, ie there is no relative movement between the pull-out rail 5 and the central rail 2. Both rails 2, 5 are moved together relative to the mounting rail 6.

So that this sequence of movements is ensured and not only depends on the different friction between sliders 17 and the rails 2, 5 and the rollers 10 of the carriage 4 between the rails 2, 6, a tilting segment 24 is provided in the exemplary embodiment according to FIGS. 10 to 16 . The tilting segment 24 also ensures that when the drawer is inserted into the furniture body, the pull-out rail 5 is first moved along the central rail 2, while the central rail 2 is held in relation to the mounting rail 6 and thereafter the central rail 2 along with the pull-out rail 5 the mounting rail 6 is moved into the furniture body.

The tilting segment 24 is supported on the central rail 2 and is fastened to it by means of a holder.

As can be seen from the figures of the drawings, a spring 25, which can be both a compression spring and a tension spring, acts on the tilting segment 24. The tilt segment 24 can be tilted in two dead center positions. The two end positions are limited by stops.

A driving pin 26 is arranged on the pull-out rail 5 or on the drawer frame 1. The tilt segment 24 has a slot 27 which receives the driver pin 26.

When the drawer is closed, the tilting segment 24 is in the position shown in FIG. 11. The driver pin 26 engages in the slot 27.

When the drawer is opened, as already explained, the pull-out rail 5 and the central rail 2 are first moved together, the tilting segment 24 remaining in its original position, as can be seen in FIG. 13. The spring 25 holds the pull-out rail 5 on the central rail 2 via the tilting segment 24.

When the middle rail 2 reaches the front stop on the mounting rail 6, its further movement is blocked and the pull-out rail 5 is moved relative to the middle rail 2. As a result, the tilting segment 24 is first rotated counter to the spring action, whereby on the one hand the driver pin 26 and thus the pull-out rail 5 is released and on the other hand a locking part 28 formed on the tilting segment 24 is brought in front of a stop 29 on the mounting rail 6. The locking part 28, in cooperation with the stop 29, prevents the middle rail 2 from moving back.

The tilting segment 24 is now in the position shown in FIG. 12 and the pull-out rail 5 is in the sliding area, ie. H. it can be moved freely on the central rail 2 while it is locked in relation to the mounting rail 6.

If the pull-out rail 5 with the drawer is moved back into the furniture body, the driver pin 26 engages in the slot 27 of the tilting segment 24, the tilting segment 24 being pivoted out of its dead center position and tipping over to the rear. This will on the one hand the pull-out rail 5 is pulled to the rear stop on the middle rail 2 and, on the other hand, the locking part 28 is pivoted past the stop 29, so that the middle rail 2 can be moved backwards with respect to the mounting rail 6.

In the rear area of the mounting rail 6, a pull-in device 30 is provided which engages on a driver pin 31 arranged on the central rail 2 and pulls the central rail 2 together with the pull-out rail 5 backwards into the furniture body along the mounting rail 6.

Such a feeding device is described, for example, in the applicant's Austrian patent application A 2534/90.

In order to prevent the tilting segment 24 from tilting too far forward, a stop 32 is provided on the central rail 2.

Claims (21)

1. Extension guide for drawers with an extension rail (5) attached to the drawer, a support rail (6) attached to the body of the furniture and a central rail (2) between both rails (5, 6) on each side of the drawer, whereby wagons (7) are provided, that hold the load-transferring rolling bodies, and the central rails exhibit a bottom U profile in which the rollers in the wagons transferring the load of the drawer from the central rails to the support rails are guided, characterized in that sliders (17) for the load transfer from the extension rails (5) to the central rails (2) are disposed at the top at the central rails (2), and the extension rails (5) exhibit a U profile with an additional bottom horizontal leg (4) which reaches under the sliders (17) and forms a lift-off safety for the drawer.
2. Extension guide as claimed in claim 1, characterized in that the extension rails (5) are part of a double walled drawer frame (1) and are moulded to the inner wall (1') of the drawer frame (1).
3. Extension guide als claimed in claim 1, characterized in that the sliders (17) incorporated into the extension rails (5) are narrower than the extension rails (5) and allow the extension rails (5) to be moved sideways.
4. Extension guide as claimed in claim 1, characterized in that one slider (17) is on the front end of the central rail (2) and the second slider (17) is approximately in the center of the center rail (2).
5. Extension guide as claimed in claim 2, characterized in that the drawer frame (1) in the region of the extension rail (5) is expanded, and that in this wide region the central rail (2) is incorporated.
6. Extension guide as claimed in claim 1, characterized in that at least one wagon (9) is guided between the sliders (17) on the central rails (2), whereby the diameter of the rollers (10) embedded therein is greater than the height (h) of the sliders (17), and a carrier is provided between the central rails (2) and the extension rails (5).
7. Extension guide as claimed in claim 6, characterized in that the rollers in the wagons (9) are shaped like rollers and extend at least approximately over the entire width of the central rail (2).
8. Extension guide as claimed in one of claims 1 to 7, characterized in that the sliders (17) envelop the central rail (2) in the shape of a U.
9. Extension guide as claimed in claim 7, characterized in that a stop (12) for the wagon (9) is provided on the central rail (2) between the sliders (17).
10. Extension guide as claimed in claim 6, characterized in that the carrier is formed by a nub (13) on the rear slider (17) projecting into a recess (14) in the extension rail (5).
11. Extension guide as claimed in claim 1, characterized in that a brake (15, 16), which holds resiliently a pin (22) or the like attached to the central rails (2), is disposed on the support rails (6) at the front and the rear, and that a coupling is provided between the central rails (2) and the extension rails (5).
12. Extension guide as claimed in claim 11, characterized in that the brakes (15, 16) are formed by forked parts with two prongs (19, 20) that are resilient in one horizontal plane and of which the one prong is rigid and the other is resilient.
13. Extension guide as claimed in claim 11 or 12, characterized in that the brakes (15, 16) are formed by plates made of plastic.
14. Extension guide as claimed in claim 12, characterized in that the springy prong (20) of the front brake (15) exhibits a lock notch (18) for the pin (22) of the central rail (2).
15. Extension guide as claimed in claim 6, characterized in that the carrier is formed by a pivot segment (24) stressed by a spring (25) and supported on the central rail (2) and exhibiting a slot (27) into which a carrier pin (26) of the extension rail (5) catches.
16. Extension guide as claimed in claim 15, characterized in that the pivot segment (24) is connected to a bolt element (28) which prevents the central rail (2) from travelling in by blocking it on the support rail (6).
17. Extension guide as claimed in claim 16, characterized in that the front end of the support rail (6) is provided with a stop (29) against which the bolt element (28) in the blocking position rests.
18. Extension guide as claimed in one of claim 15 to 17, characterized in that a pull-in device (30) is provided between the central rail (2) and the support rail (6).
19. Extension guide as claimed in claim 18, characterized in that the pull-in device (30) is supported on the support rail (6).
20. Extension guide as claimed in claim 15, characterized in that the pivot segment (24) can be tipped over a dead point.
21. Extension guide as claimed in claim 20, characterized in that stops (32) defining the pivot angle of the pivot segments (24) are provided on the central rails (2).

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