PULL-OUT GUIDE WITH SYNCHRONIZATION MEANS AND DAMPENING AGENTS

Abstract

A drawer runner that can easily be installed and is able to bear heavy loads for the floor mounting of pharmacy cabinets has a carcass rail, a central rail and a pull-out rail. The pull-out rail is accommodated so that it can move in the central rail and, in turn, is accommodated so that it can move in the carcass rail in a nested manner, and is synchronized and damped.

Claims

1. A drawer runner (1) comprising a carcass rail (2), a central rail (3) and a pull-out rail (4), wherein the pull-out rail (4) is accommodated such that it can move in the central rail (3), and in turn the latter is accommodated such that it can move in the carcass rail (2), wherein: the carcass rail (2) is designed to be essentially C-shaped in cross-section, with two free legs (5, 6) and a base plate (7) connecting these to each other, wherein the respective free ends (8, 9) of the free legs (5, 6) are bent towards each other, and wherein the carcass rail (2) has running tracks (10, 11) for track rollers (12) of the central rail (3), wherein the central rail (3) has two side walls (14, 14) spaced apart from each other by means of at least two spacers (13), wherein each side wall (14, 14) has track rollers (12), wherein the pull-out rail (4) is designed to be essentially C-shaped in cross-section, with two free legs (15, 16) and a base plate (17) connecting these to each other, wherein the base plate (17) projects beyond the free legs (15, 16) by means of a web (18) in cross-section, such that a running track (10, 11) for track rollers (12) of the central rail (3) is formed laterally from each leg (15, 16), wherein a damping unit (19) is arranged on the central rail (3), which acts both in the direction of an open position, and in the direction of a closed position, of the pull-out rail (1), wherein an actuator (20) for the actuation of the damping unit (19) is arranged on the carcass rail (2) on opposite sides in their respective end regions, wherein the drawer runner (1) further has a synchronisation means (21), which in turn has two guide rollers (22, 23) and a cable (24) circulating around the latter, wherein the cable (24) is designed to be connected to the carcass rail (2) and the pull-out rail (4).

2. The drawer runner (1) in accordance with claim 1, wherein the at least two spacers (13) each have a guide roller (22, 23), in particular in the form of an attached one-piece sleeve (26); a further spacer (13) preferably has a cable guide (27).

3. The drawer runner (1) in accordance with claim 1, wherein the at least two spacers (13) are designed as a flat connecting part between the two side walls (14, 14).

4. The drawer runner (1) in accordance with claim 1, wherein a first connecting part (25) is detachably attached to the carcass rail (2) between the guide rollers (22, 23), and a second connecting part (25) is detachably attached to the pull-out rail (4) in the direction of its end behind a guide roller (23), such that the force transmitted by the cable during a movement of the rails is transmitted to the said rails.

5. The drawer runner (1) in accordance with claim 1, wherein the cable (24) is non-detachably attached to the carcass rail (2) between the guide rollers (22, 23), and a connecting part (25) is detachably attached to the pull-out rail (4) in the direction of its end behind a guide roller (23), such that the force transmitted by the cable in the course of a movement of the rails is transmitted to the said rails.

6. The drawer runner (1) in accordance with claim 1, wherein the cable (24) is guided in a groove (33) for purposes of force transmission, and the connecting part (25) prevents the cable (24) from jumping out of the guide rollers (22, 23).

7. The drawer runner (1) in accordance with claim 1, wherein the damping unit (19), which damps in two directions, has a common damper, a spring and two damping springs (35) that can be tensioned and released independently of each other.

8. The drawer runner (1) in accordance with claim 1, wherein the damping unit (19) and/or the actuators (20) are detachably connected to the central rail (3) in a plug-in manner without tools.

9. The drawer runner (1) in accordance with claim 1, wherein the side walls (14, 14) of the central rail (3) are identical parts.

10. The drawer runner (1) in accordance with claim 1, wherein the central rail (3) has two differential rollers (29).

11. A method for the installation of a drawer runner (1), comprising the steps of: provision of a carcass rail (2), provision of a pull-out rail (4), assembly of the central rail (3) and assembly of the carcass, centre and pull-out rails (2, 3, 45) to form the drawer runner (1), wherein the assembly of the central rail (3) comprises the steps of: connection of track rollers (12) to a first and a second side wall (14, 14) of the central rail (3), connection of at least two spacers (13) to the first side wall (14) of the central rail (3), winding of a circulating cable (24) onto the guide rollers (22, 23), fitting of the circulating cable (24) with guide rollers (22, 23) onto the spacers (13), assembly of the two side walls (14, 14), and wherein the assembly of the three rails (2, 3, 4) contains the steps of: introduction of the central rail (3) into the carcass rail (2), and fixing of the cable (24) to the carcass rail (2), followed by the introduction of the pull-out rail (4) into the central rail (3) and the fixing of the cable (24) to the pull-out rail (4), or introduction of the pull-out rail (4) into the central rail (3), and fixing of the cable (24) to the pull-out rail (3), followed by the introduction of the pull-out rail and central rail (3) into the carcass rail (2), and the fixing of the cable (24) to the carcass rail (2).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The invention is explained in more detail below with reference to the figures in the illustrations, whereby identical components are given the same reference symbols. Here:

[0026] FIG. 1: shows a perspective view of the drawer runner in the open position,

[0027] FIG. 2a: shows a front view in the closed position,

[0028] FIG. 2b: shows a rear view in the closed position,

[0029] FIG. 3: shows a side view of the central rail, in a section cut at the height of the circulating cable,

[0030] FIG. 4: shows a side view of the exterior of the central rail, in a section cut at the height of the rollers and the belt,

[0031] FIG. 5: shows individual perspective views of the carcass rail, the central rail and the pull-out rail, and

[0032] FIG. 6: shows a detail of the carcass rail, with cable and connecting device.

BRIEF DESCRIPTION OF THE DRAWINGS

[0033] FIG. 1 shows a perspective view of the drawer runner 1 in the open position. The carcass rail 2 forms the largest and, in the installed position, the lowest of the three nested rails of the drawer runner 1. On the left-hand side of the carcass rail 2, which is approximately C-shaped in cross-section, attachment openings 29 can be seen in the base plate 7. The free ends 8, 9 of the free legs 5, 6 are bent towards each other, one of which carries one of the two actuators 20 for the damping unit 19.

[0034] The central rail 3, accommodated in the carcass rail 2, has two side walls 14, 14, which are designed as identical parts. The central rail 3 has track rollers 12, the foremost of which can be seen in FIG. 1. One of the spacers 13 can be seen; this spaces the two side walls 14, 14 apart from each other.

[0035] The central rail 3 accommodates the pull-out rail 4 in a nested manner. The pull-out rail 4 has a base plate 17 with lateral webs 18 facing away from each other, which in the direction of the central rail 3 connect to the free legs 15, 16 of the pull-out rail 4, which project essentially at right angles from the base plate 17. Connecting devices 30 for a pull-out door are arranged on, and attached to, the base plate 17. The webs 18 form running tracks 10, 11 for the wheels 12 of the central rail 2.

[0036] With this arrangement of the three rails 2, 3, 4 of the drawer runner 1, the load occurring in the installation position through the pull-out door is always in the centre of the rails; there are no transverse forces, as would otherwise be expected with a laterally arranged guide of the pull-out door.

[0037] FIG. 2a shows the front view, and FIG. 2b the rear view, of the inventive drawer runner 1, in each case in the closed position. The nested arrangement of the three rails 2, 3 and 4 can clearly be recognised.

[0038] With its free legs 5, 6, the carcass rail 2 has running tracks 10, 11 for track rollers 12 of the central rail 3, each of which track rollers is attached to the side of the respective side wall 14, 14 facing the carcass rail 2. By virtue of the free ends 8, 9, which are bent towards each other, these track rollers 12 are encased and thus securely guided. In this case, the free ends 8, 9 are not bent towards each other over the entire length of the carcass rail; this is to allow the central rail 3 to be introduced or removed from the carcass rail 2, as shown in FIG. 1, for example.

[0039] Those track rollers 12 of a side wall, 14 or 14, which in each case are arranged on the side of this side wall facing the other side wall, run on running tracks 10, 11, which are formed by the webs 18. The track rollers 12 arranged above a web 18 are those which, in the open position of this form of embodiment of the inventive pull-out device, operate on that part of the pull-out rail 4 which, in the open position, is still located inside the central rail 3 and thereby provides rear support.

[0040] FIG. 2b also shows a guide roller 23, around which the circulating cable 24 runs, and which has a groove as a cable guide 27 to guide the said cable laterally.

[0041] The damping unit 19, which, in accordance with the invention, operates in both directions, is shown arranged on the central rail 3.

[0042] FIG. 3 shows a side view of the central rail in a section cut at the height of the circulating cable 24 in the closed position. In this form of embodiment, the inventive synchronisation means 21 are formed by the circulating cable 24, two guide rollers 22, 23, and two connecting parts 25, connecting to the carcass rail 2 and the pull-out rail 4. The cable 24 is made of plastic or metal with an essentially round, in particular a circular, cross-section, or also as a belt with an essentially rounded rectangular cross-section.

[0043] At least one of the guide rollers 22, 23 has a lateral cable guide 27, in particular in the form of a groove in the centre of the roller; preferably both guide rollers each have a cable guide 27. This is shown in FIGS. 2a and 2b as described above.

[0044] In a surprisingly simple form of design, and with great advantage, one or both guide rollers 22, 23 of the circulating cable 24 are moulded or arranged on a sleeve 26, which is pushed onto a spacer 13. The spacers required for the central rail 3 thus advantageously have a further function, namely that of mountings for the guide rollers.

[0045] The two connecting parts 25 shown are detachably attached between the guide rollers 22, 23, once to the carcass rail 2, and once to the pull-out rail 4; in particular they are clipped into corresponding openings in the rails. Here the connection of the cable 24 to the carcass rail 2 is preferably arranged at or in the region of the stop provided on this rail, for the maximum pull-out of the central rail, which further simplifies the design.

[0046] It is particularly advantageous for the two spacers and the two sleeves 26 with guide rollers 22, 23, and cable guides 27 as required, to be designed as identical parts.

[0047] This makes assembly easy, as will be explained below, and at the same time only low tolerances are required, as only two parts are in contact with each other, and the closed cable loop is quick and easy to install.

[0048] FIG. 4 shows external side views of the drawer runner 1, at the top in the open position, and at the bottom in the closed position, in which the three rails 2, 3, 4 are nested inside each other.

[0049] The single damping unit 19 of the drawer runner 1 is attached to the central rail 3. This positioning is particularly advantageous, as the forces constantly acting on the pull-out rail 4 can be absorbed particularly well in the course of both the pull-out and push-in movements. The damper located in the damping unit 19, in particular the damping spring 35, is activated once from its piston side, and once from its housing side, in each case by means of a swivel bolt 28, which in turn advantageously enables a floating mounting of the damper.

[0050] It is contacted, and thus actuated, by actuators 20, both in the pull-out direction A and in the push-in direction B.

[0051] FIG. 5 shows three rails 2, 3 and 4 of the drawer runner in individual perspective views. On the left-hand side is shown the approximately C-shaped carcass rail 2, with a base plate 7, and free legs 5, 6 arranged on the latter. The free ends 8, 9 are bent towards each other in a region of the length of the carcass rail 2, and thus form a region of the surrounding guide for track rollers 12 of the central rail 3. Stops 31 limit the pull-out path of the central rail 3, both in the pull-out direction and also in the push-in direction. The circulating cable 24 is fixed to this rail, with the fixing point located between the guide rollers 22, 23. As shown in FIG. 3, it is fixed by means of a clipped-in connecting part 25.

[0052] The two side parts 14, 14 of the central rail 3, which are spaced apart by spacers 13, carry the track rollers 12, the single damping unit 19 with two damping springs 35 of the device 1, and the synchronisation means (not shown in FIG. 5). These advantageously utilise the spacers 13 as supports for sleeves 26, which in turn each carry a guide roller 22, 23, around which runs the circulating cable 24 (see FIG. 3), thus preventing slippage between the central rail 3 and the pull-out rail 4 as the drawer is pushed in.

[0053] This form of embodiment has one differential roller 12 per side part 14, 14, so that this example of embodiment takes the form of a differential drawer runner.

[0054] With the two webs 18 on its upper and lower faces, the pull-out rail 4 shown on the right-hand side provides running tracks for the track rollers 12, which in turn are each arranged on a side part 14, 14. The pull-out rail 4, which is designed as a stamped and bent part, establishes the connection to a pull-out door by way of the connecting devices 30. In their respective embodiments, these connecting devices are adjusted to the particular requirements and embodiments of the pull-out furniture part, and therefore vary. The circulating cable 24 is fixed to the pull-out rail 4 by means of a connecting part 25 (see FIG. 3) that is simply clipped into a through-opening in the base plate 17 of the pull-out rail 4. Here the fixing point is located between the guide rollers 22, 23.

[0055] FIG. 6 shows a detail of the carcass rail 2, in the region of the attachment of the cable 24; this is in accordance with a second form of embodiment of the synchronisation device of the invention that is supplementary to the form of embodiment shown in FIG. 3.

[0056] A stop 32 for the central rail 3 is shown on the base plate 7. This has a V-shaped cut in the direction of the base plate 7, which cut ends in a groove 33 through which the cable 24 passes. The cable 24 in turn has a connecting part 25, which serves to transmit force to the carcass rail 2 and is therefore shaped accordingly. A hook 34 formed out from the base plate 7 prevents the cable 24 from moving upwards and thus possibly emerging from the groove 33, which would disable the synchronisation device. The connecting part 25 is connected to the cable 24, whereby the cable here has a circular cross-sectional area. With great advantage, this form of embodiment provides the component of the stop with a further function, namely that of providing a tension-resistant connection between the cable 24 and the carcass rail 2 by way of the connecting part 25. With great advantage, the invention provides a drawer runner that is secured against slippage and synchronised, as well as one that is damped with only one damping device in both the pull-out and the push-in directions, which can easily cope with the forces that occur, and also with the large loads of the pull-out doors when installed, as described above.

[0057] In a corresponding manner, this structure can also be present on the drawer profile, to which the cable 24 is also fixed, as described above. However, the attachment to the pull-out rail can easily be designed in a different manner to that on the carcass rail, for example with a connecting part 25 that can be attached in a recess of the pull-out rail, which connecting part, in particular, is fixedly connected to the cable 24.

REFERENCE LIST

[0058] 1. Drawer runner [0059] 2. Carcass rail [0060] 3. Central rail [0061] 4. Pull-out rail [0062] 5. Free leg [0063] 6. Free leg [0064] 7. Base plate [0065] 8. Free end [0066] 9. Free end [0067] 10. Running track [0068] 11. Running track [0069] 12. Track roller [0070] 13. Spacer [0071] 14. Side wall [0072] 15. Free leg [0073] 16. Free leg [0074] 17. Base plate [0075] 18. Web [0076] 19. Damping unit [0077] 20. Actuator [0078] 21. Synchronisation means [0079] 22. Guide roller [0080] 23. Guide roller [0081] 24. Circulating cable [0082] 25. Connecting part [0083] 26. Sleeve [0084] 27. Cable guide [0085] 28. Swivel bolt [0086] 29. Attachment opening [0087] 30. Connecting device [0088] 31. Stop [0089] 32. Stop [0090] 33. Groove [0091] 34. Hook [0092] 35. Damping spring