Pull-out guide for a movable furniture part

Abstract

A pull-out guide includes a carcass rail, a drawer rail movable along a longitudinal axis in an opening and closing direction of a movable furniture part, a drive apparatus for moving the drawer rail and the movable furniture part between a closed position and an open position, and a depth adjustment device for adjusting the closed position of the drawer rail relative to the carcass rail. The depth adjustment device has a carrier, a stop element movable relative to the carrier, and a depth adjustment wheel mounted rotatably about a rotation axis on the carrier for moving the stop element along the longitudinal axis. The rotation axis of the depth adjustment wheel is parallel to the longitudinal axis, and the stop element contacts a stop-counterpart piece of the drive apparatus in the closed position and is releasable by the stop-counterpart piece.

Claims

1. A pull-out guide for a furniture part that is movable relative to a furniture carcass, the pull-out guide comprising: a carcass rail to be connected to the furniture carcass; a drawer rail mounted movably on the carcass rail and connectable to the movable furniture part and having a longitudinal axis, wherein the drawer rail is movable along the longitudinal axis in an opening and closing direction of the movable furniture part; a drive device configured to move the drawer rail and the movable furniture part connectable thereto at least in a partial range of travel between a closed position and an open position; and a depth adjustment device configured to adjust the closed position of the drawer rail relative to the carcass rail, wherein the depth adjustment device includes a carrier, a stop element movable relative to the carrier along the longitudinal axis, and a depth adjustment wheel mounted on the carrier so as to be rotatable about an axis of rotation so as to move the stop element along the longitudinal axis, wherein the axis of rotation of the depth adjustment wheel is oriented parallel to the longitudinal axis, wherein the drive device is installed on the carcass rail, wherein the carrier of the depth adjustment device is installed on the drawer rail, and wherein the stop element bears against a stop counterpart of the drive device in the closed position, and, during the travel from the closed position into the open position, is separable from the stop counterpart.

2. The pull-out guide according to claim 1, wherein the stop element has a driver and a movement transmission region connected to the depth adjustment wheel.

3. The pull-out guide according to claim 2, wherein the driver extends at right angles with respect to the longitudinal axis and in a vertical direction when in a fitted state in the furniture carcass.

4. The pull-out guide according to claim 2, wherein the movement transmission region is formed as an external thread extending in spiral fashion about the axis of rotation.

5. The pull-out guide according to claim 1, wherein the depth adjustment wheel is at least partially formed as a sleeve about the axis of rotation.

6. The pull-out guide according to claim 4, wherein the depth adjustment wheel has an internal thread extending in spiral fashion about the axis of rotation, wherein the internal thread corresponds to the external thread of the movement transmission region.

7. The pull-out guide according to claim 6, wherein the internal thread is formed on an inner surface of the depth adjustment wheel, the inner surface covering an angle of at most 180? about the axis of rotation and the depth adjustment wheel has a recess situated radially opposite the inner surface in a region of the internal thread.

8. The pull-out guide according to claim 1, wherein the depth adjustment wheel has an actuation region formed by a lateral surface of the depth adjustment wheel, the lateral surface being formed about the axis of rotation.

9. The pull-out guide according to claim 1, wherein the depth adjustment wheel has an outer side with a knurl thereon.

10. The pull-out guide according to claim 1, wherein the depth adjustment device has a latching stud and latching depressions corresponding to the latching stud.

11. The pull-out guide according to claim 1, wherein the depth adjustment device has an anti-rotation mechanism for the stop element in the carrier.

12. The pull-out guide according to claim 1, wherein the drive device is an ejection device configured to eject the drawer rail from the closed position into the open position.

13. The pull-out guide according to claim 12, wherein the ejection device includes a carrier attached to the carcass rail, an ejection carriage movable relative to the carrier, and an ejection energy storage mechanism connected to the carrier and the ejection carriage.

14. The pull-out guide according to claim 13, wherein, in the closed position, the ejection carriage of the ejection device bears against the stop element of the depth adjustment device via the stop counterpart formed on the ejection carriage.

15. The pull-out guide according to claim 14, wherein the ejection carriage has a catching lever jointly forming the stop counterpart, and the catching lever engages around the driver of the stop element and holds the driver in a positively locking fashion in the closed position.

16. A piece of furniture comprising a furniture carcass, a movable furniture part, and the pull-out guide according to claim 1.

17. The piece of furniture according to claim 16, wherein the movable furniture part is mounted movably on the furniture carcass by two pull-out guides installed on opposite sides of the furniture carcass.

18. The pull-out guide according to claim 2, wherein the driver is bolt-shaped.

19. The pull-out guide according to claim 9, wherein the knurl is formed on a lateral outer surface of the depth adjustment wheel, and is oriented along the longitudinal axis.

20. The pull-out guide according to claim 10, wherein the latching depressions are arranged at regular intervals about the longitudinal axis.

21. The piece of furniture according to claim 17, wherein the two pull-out guides are mirror-symmetrical with respect to one another.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) Further details and advantages of the present invention will be explained in more detail below on the basis of the description of the embodiments illustrated in the drawings, in which:

(2) FIG. 1 schematically shows a piece of furniture with multiple movable furniture parts, arranged one above the other, in different positions,

(3) FIG. 2 is a perspective view of a movable furniture part with two pull-out guides together with drive device,

(4) FIG. 3 is a perspective view of a movable furniture part together with pull-out guide,

(5) FIG. 4 shows a detail from FIG. 3,

(6) FIGS. 5-10 is a top view of the movable furniture part together with pull-out guide with the depth adjustment device in different positions in each case, and details of the depth adjustment device,

(7) FIG. 11 is a perspective view of a pull-out guide with a first variant of the drive device,

(8) FIG. 12 shows a detail from FIG. 11,

(9) FIG. 13 shows a vertical section through the pull-out guide as per FIG. 11,

(10) FIG. 14 shows a detail from FIG. 13,

(11) FIG. 15 is a perspective view of a pull-out guide, in the closed position, with a second variant of the drive device,

(12) FIG. 16 shows a detail from FIG. 15,

(13) FIG. 17 shows the pull-out guide as per FIG. 15 in an open position,

(14) FIG. 18 shows a detail from FIG. 17,

(15) FIGS. 19-38 are different illustrations, perspectives, sections and details of a first embodiment example of the depth adjustment device,

(16) FIGS. 39-45 are different illustrations, perspectives, sections and details of a second embodiment example of the depth adjustment device, and

(17) FIGS. 46-49 are different illustrations, perspectives and details of a third embodiment example of the depth adjustment device.

DETAILED DESCRIPTION OF THE INVENTION

(18) FIG. 1 very generally illustrates a piece of furniture 8 having a furniture carcass 3 and a total of four movable furniture parts 2 in the form of drawers. Each drawer consists at least of a drawer container 10 and a front panel 11. The drawers are fastened to the furniture carcass 3 by means of a (drawer) pull-out guide 1 consisting of a drawer rail 5 and a carcass rail 4 (and optionally a middle rail, not illustrated).

(19) A drive device 6 is schematically illustrated in the case of the uppermost drawer. The drive device 6 has a carrier 62. In this case, this carrier 62 is attached to the drawer rail 5. According to the invention, the drive device 6 is howeverby contrast to FIG. 1attached to the carcass rail 4. The drive device 6 is in this case formed as an ejection device 61, wherein the ejection carriage 63 and the ejection energy storage mechanism 65 of this ejection device 6 are schematically illustrated. The locking device 66 has a guide track 67, which is formed in the carrier 62, and the locking peg 68, which is guided in the (in this case cardioid-shaped) guide track 67. On the carcass rail 4 (or on the furniture carcass 3 itself), there is arranged a driver 74 with which the ejection device 61 engages at least in sections. According to the invention, the arrangement is however reversed: that is to say, the drive device 6 is assigned to the carcass rail 4, whereas the driver 74 is assigned to the movable furniture part 2. This uppermost drawer is situated in the open position OS.

(20) If the drawer is moved from this open position OS in a closing direction SR, the locking peg 68 moves in a closing portion of the guide track 67.

(21) In the process, the ejection energy storage mechanism 65 is tensioned as a result of a relative movement between ejection carriage 63 and carrier 62.

(22) In the closed position SS (third drawer from the top), the ejection energy storage mechanism 65 has been fully tensioned. This closed position SS can be reached as a result of a purely manual closing movement. Alternatively, the drawer can be moved or retracted into the closed position SS by the retraction device 69, if present, which is merely schematically illustrated and is integrated into the pull-out guide 1.

(23) Proceeding from this closed position SS, pressing on the drawer causes the drawer to move into the overpressed position US (lowermost drawer in FIG. 1). This causes the unlocking of the locking device 66. After the overpressing carried out in a closing direction SR, as soon as the user no longer presses on the drawer, the drawer is ejected in an opening direction OR by the drive device 6. The drawer thus moves into the open position OS as per the second drawer from the top. In this position, the drawer can be gripped for example by way of the front panel 11 and manually moved further into the position as per the first drawer from the top.

(24) FIG. 2 is a perspective illustration of a drawer (movable furniture part 2) having a drawer container 10 and a front panel 11. Also illustrated is an arrangement composed of two pull-out guides 1 having in each case two drawer rails 5 and two carcass rails 4, wherein in each case one drawer rail 5 and one carcass rail 4 of the pull-out guide 1 are provided on both sides of the drawer. FIG. 2 furthermore shows a drive device 6. The drive device 6 is attached to the carcass rail 4. This drive device 6 (or the carrier 62 thereof) extends in the closing direction SR of the drawer. This closing direction also corresponds to the longitudinal axis L of the drawer rail 5 or of the pull-out guide 1 as a whole. In particular in the case of relatively small or relatively narrow drawers 2, it is sufficient for the drawer to be assigned only one drive device 6. The latter can (as illustrated) be assigned to the right-hand pull-out guide 1 (but also to the left-hand pull-out guide 1).

(25) FIG. 3 is a perspective illustration of a movable furniture part 2 together with drawer rail 5 and carcass rail 4. In the circle indicated, the depth adjustment device 7, which is installed on the drawer rail 5, is illustrated.

(26) FIG. 4 shows the detail circled in FIG. 3, on an enlarged scale. The main components of the depth adjustment device 7 can thus be seen. This depth adjustment device 7 is made up of the carrier 71, the stop element 72 and the depth adjustment wheel 73. The carrier 71 is fixedly connected to the drawer rail 5. The stop element 72 is mounted in the carrier so as to be displaceable along the longitudinal axis L. The depth adjustment wheel 73 is in turn rotatable about the axis of rotation D. As can be seen, the axis of rotation D and the longitudinal axis L are oriented parallel to one another.

(27) FIGS. 5 to 10 illustrate the movable furniture part 2 with the pull-out guide 1 in each case from above and in each case in the closed position SS, wherein the differently set depth adjustment device 7 generates a different dimension for the front panel gap F in each case. In general, in each of said FIGS. 5 to 10, the movable furniture part 2 has been partially omitted in order to provide a view in the direction of the depth adjustment device 7 and of the drive device 6.

(28) In FIG. 5, and in the detail as per FIG. 6, it can be seen that the stop element 72 has been extended to a relatively great extent relative to the carrier 71. Since the stop element 72 is bearing against the stop counterpart 60 (not visible in detail here) of the drive device, a relatively large front panel gap F is formed.

(29) If the depth adjustment device 7 is actuated by way of the depth adjustment wheel 73, the stop element 72 is moved linearly relative to the carrier 71. In FIG. 7 and the associated detail 8, this results in a smaller front panel gap F in the closed position SS.

(30) If the depth adjustment wheel 73 is rotated further in the same direction, this soon results in a position as in FIG. 9 and the associated detail as per FIG. 10. The stop element 72 has been almost completely retracted into the carrier 71. There is practically no longer a front panel gap F.

(31) From a comparison of FIGS. 5, 7 and 9, it is also evident that there is in each case a different relative position between the carcass rail 4 and the drawer rail 5 in the closed position SS.

(32) The pull-out guide 1 is illustrated in a perspective view in FIG. 11 and the associated detail as per FIG. 12. The drive device 6 is situated between the drawer rail 5 and the carcass rail 4. The furniture fitting is thus as a whole formed relatively narrow. The furniture fitting is thus laterally delimited by the two rails 4 and 5, the drive device 6 does not protrude laterally.

(33) The pull-out guide 1 is illustrated in the form of a (vertical) section in FIG. 13 and the associated detail as per FIG. 14. It can be seen that the carcass rail 4 and the drawer rail 4 are each formed as bent metal profiles. The drawer rail 5 is mounted movably on the carcass rail 4 via rollers 9. FIG. 14 shows in particular the carrier 71 and the attachment thereof to the drawer rail 5, and the stop element 72.

(34) FIGS. 15 to 18 show a further design variant of the pull-out guide 1, in perspective and detail views. This design variant differs from the preceding one through the design of the drive device 6. In this case, the drive device 6 is formed as a retraction device 69, whereas the drive device 6 in FIG. 11 is formed as an ejection device 61 for ejecting the drawer rail 5 from the closed position SS into an open position OS.

(35) It can also be provided that the drive device 6 combines both functions and functions both as an ejection device 61 and as a retraction device 69.

(36) In FIG. 15, the pull-out guide 1 is in the closed position SS, whereas, in FIG. 17, the pull-out guide is illustrated in an open position OS. In the closed position SS, the stop element 72 bears against the stop counterpart 60 of the drive device 6 (see circled detail from FIG. 15 in FIG. 16). By contrast, in FIG. 17, the stop element 72 is spaced apart, and thus detached, from the stop counterpart 60.

(37) Said stop counterpart 60 can be formed on a catching lever. The catching lever, in the closed position SS, engages around the driver 74 of the stop element 72 and holds it in positively locking fashion. During a movement in the opening direction OR, the positively locking connection is removed by pivoting the catching lever.

(38) FIGS. 15 to 18 each illustrate the so-called drawer rail 12. This serves as a connecting device for connecting the drawer container 10 to the drawer rail 5.

(39) FIGS. 19 to 38 show a first embodiment example of a depth adjustment device 7 in different illustrations, perspectives, (partial) sections and details.

(40) FIG. 19 shows the components of the depth adjustment device 7 in an exploded illustration.

(41) The carrier 71 is formed as a preferably metallic bent bracket. This carrier 71 has a base region 711 and two holding lugs 712, with guide openings 713 respectively formed therein, which protrude substantially at right angles from the base region 711. In addition, an opening 714 for the arresting element 7c is formed in the carrier 71.

(42) The stop element 72 is mounted in the guide openings 713 so as to be displaceable along the longitudinal axis L. The stop element 72 has a bolt-shaped driver 74 and a movement transmission region 75. The movement transmission region 75 is formed as an external thread 76 extending in spiral fashion about the axis of rotation D.

(43) Between the driver 74 and this external thread 76, the stop element 72 has lateral projections 721. These projections 721, together with corresponding depressions in the region of the guide opening 713, form an anti-rotation mechanism for the stop element 72 in the carrier 71, with the result that the stop element 72 cannot rotate about the axis of rotation D.

(44) The depth adjustment wheel 73 is, at least in regions, formed in the manner of a sleeve about the axis of rotation D, and has an elongate opening with an internal thread 77 extending in spiral fashion about the axis of rotation D. This internal thread 77 corresponds with the external thread 76 of the movement transmission region 75 of the stop element 72. On its outer sidespecifically on its lateral surfacethe depth adjustment wheel has a knurl 79. This knurl 79 is formed lamellar or rib-shaped, wherein the lamellae or ribs extend along the longitudinal axis L.

(45) Latching depressions 7b are formed on the depth adjustment wheel 73 (which latching depressions correspond to the lamella troughs). These latching depressions 7b correspond with the latching stud 7a of the arresting element 7c. When the depth adjustment wheel 73 is rotated, a ratchet feel is generated by means of this latching stud 7a. In addition, the depth adjustment wheel 72 is held in its position by the arresting element 7c, with the result that, in the event of vibrations, said depth adjustment wheel cannot rotate of its own accord about the stop element 72 and thus cause an undesired adjustment of the depth position or of the front panel gap F.

(46) FIG. 20 illustrates the depth adjustment device in the assembled state. The stop element 72 is led through the two guide openings 713, and the depth adjustment wheel 73 is mounted rotatably on the stop element 72, wherein a movement of the depth adjustment wheel 73 along the longitudinal axis L is prevented by the holding lugs 712 of the carrier 71.

(47) FIG. 21 shows the same illustration as FIG. 20 once again.

(48) FIG. 22 provides a clearer view of the depth adjustment wheel 73. It can be seen that the depth adjustment wheel 73 has a recess 78. This is advantageous for the production of the depth adjustment wheel 73, and of the internal thread 77 thereof, in a plastics injection-molding process.

(49) FIG. 23 shows a view through this recess 78 of the depth adjustment wheel 23, wherein a small part of the internal thread 77 and a larger region of the external thread 76 are visible. The knurl 79 on the lateral surface of the depth adjustment wheel 23 can also be clearly seen.

(50) The detail as per FIG. 23 originates from the perspective illustration of the depth adjustment device 7 of FIG. 24.

(51) FIGS. 25 and 26 show the depth adjustment device 7, truncated in the center, from different perspectives.

(52) It can be seen in FIG. 27 that the stop element 72 is flattened on one side in the region of the external thread 76. In this way, the rotational movement of the depth adjustment wheel 73 on the external thread 76 is smoother, because there is less friction.

(53) FIG. 28 shows a detail, pertaining to FIG. 29, of the depth adjustment device 7.

(54) FIGS. 30 to 34 illustrate the depth adjustment wheel 73 in different perspectives. In the front view as per FIG. 32, it can be seen that the thread elevations of the internal thread 77 protrude in the direction of the axis of rotation D from the rest of the inner surface of the depth adjustment wheel 73. A relatively frictionless rotational movement is thus possible. It can be seen in FIGS. 33 and 34 that the internal thread 77 is formed not over the full circumference but only over half of the circumference of the inner surface of the depth adjustment wheel 73. The recess 78 is situated radially opposite this internal thread 77.

(55) FIG. 35 indicates a section through the depth adjustment device 7 that is illustrated in FIG. 36. The internal thread 77 and the corresponding external thread 76 can be clearly seen. The arresting element 7c with its latching stud 7a, the bolt-shaped driver 74 and the carrier 71 can also be seen.

(56) Rotating the adjustment wheel 73 about the axis of rotation D causes the depth adjustment device 7 to move into the position as per FIGS. 37 and 38.

(57) FIG. 39 shows a further embodiment example of a depth adjustment device 7. The stop element 72 together with driver 74 and movement transmission region 75 is formed practically identically to that in the preceding embodiment example. Differences exist in the depth adjustment wheel 73, which has fewer lamellar knurls 79. Instead, this depth adjustment wheel 73 however has more, specifically three, recesses 78.

(58) FIG. 40 illustrates the depth adjustment device 7 as per FIG. 39 in the assembled state.

(59) FIGS. 41 to 43 illustrate the depth adjustment wheel 73 in different perspectives. The recesses 78 can be clearly seen in FIG. 41.

(60) FIG. 42 shows a half-cutaway top view of a depth adjustment wheel 73. This provides a view of the three separate internal threads 77, which are arranged radially opposite a respective recess 78.

(61) In the section as per FIG. 43, it is possible to see the latching stud 7a, which in this case is formed directly on the depth adjustment wheel 73.

(62) The section indicated in FIG. 44 is illustrated in FIG. 45. The three internal threads 77, which are formed in the shape of half-shells, are arranged opposite the respective recesses 78 and correspond with the external thread 76 of the stop element 72.

(63) FIGS. 46 to 49 show a third embodiment example of the depth adjustment device 7. By contrast to the preceding embodiment examples, a spreading element 722 is arranged at that end of the stop element 72 which is remote from the driver. This prevents the stop element 72 from being able to be completely unscrewed from the carrier 71 and the depth adjustment wheel 73.

(64) FIG. 48 shows the different design of the arresting element 7c. In the detail as per FIG. 49, the latching stud 7a is held between the lamellar knurls 79 on the lateral surface of the depth adjustment wheel 73.

LIST OF REFERENCE NUMBERS

(65) 1 Pull-out guide 2 Movable furniture part 3 Furniture carcass 4 Carcass rail 5 Drawer rail 6 Drive device 60 Stop counterpart 61 Ejection device 62 Carrier 63 Ejection carriage 65 Ejection energy storage mechanism 66 Locking device 67 Guide track 68 Locking peg 69 Retraction device 7 Depth adjustment device 71 Carrier 711 Base region 712 Holding lugs 713 Guide openings 714 Opening 72 Stop element 721 Projections 722 Spreading element 73 Depth adjustment wheel 74 Driver 75 Movement transmission region 76 External thread 77 Internal thread 78 Recess 79 Knurl 7a Latching stud 7b Latching depressions 7c Arresting element 8 Piece of furniture 10 Drawer container 11 Front panel 12 Drawer rail L Longitudinal axis OR Opening direction SR Closing direction OS Open position SS Closed position US Overpressed position D Axis of rotation F Front panel gap