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, in particular for a drawer, the pull-out guide comprising: a carcass rail to be connected to the furniture carcass, a drawer rail which is mounted movably on the carcass rail and which is connectable to the movable furniture part and has 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 for moving the drawer rail and the movable furniture part that is connectable thereto at least in a partial range of the movement travel between a closed position and an open position, and a depth adjustment means for adjusting the closed position of the drawer rail relative to the carcass rail, wherein the depth adjustment means has a carrier, a stop element, which is movable relative to the carrier along the longitudinal axis, and a depth adjustment wheel, which is mounted on the carrier so as to be rotatable about an axis of rotation, for moving the stop element along the longitudinal axis, wherein the axis of rotation of the depth adjustment wheel is oriented parallel to the longitudinal axis, the drive device is installed on the carcass rail, the carrier of the depth adjustment means is installed on the drawer rail, and the stop element, in the closed position, bears against a stop counterpart of the drive device and, during the movement travel from the closed position into an open position, can be separated from the stop counterpart.

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

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

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 in regions, formed in the manner of 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 this internal thread corresponds with 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, which covers an angle of at most 180° about the axis of rotation, of the depth adjustment wheel, and the depth adjustment wheel has, in that region, a recess that is situated radially opposite said inner surface.

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

9. The pull-out guide according to claim 1, wherein the depth adjustment wheel has, on its outer side, preferably on its lateral surface, a knurl that is preferably oriented along the longitudinal axis.

10. The pull-out guide according to claim 1, wherein the depth adjustment means has a latching stud and latching depressions which correspond with the latching stud and which are preferably arranged at regular intervals about the longitudinal axis.

11. The pull-out guide according to claim 1, wherein the depth adjustment means 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 formed as an ejection device for ejecting the drawer rail from the closed position into an open position.

13. The pull-out guide according to claim 12, wherein the ejection device has a carrier that is attached to the carcass rail, an ejection carriage that is movable relative to the carrier, and an ejection energy storage mechanism that is 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 means via the stop counterpart that is formed on the ejection carriage.

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

16. A piece of furniture having 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 means of two pull-out guides which are installed on opposite sides of the furniture carcass and which are preferably formed so as to be mirror-symmetrical with respect to one another.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Further details and advantages of the present invention will be explained in more detail below on the basis of the description of the figures and with reference to the embodiment examples illustrated in the drawings. There are shown in:

[0039] FIG. 1 schematically shows a piece of furniture with multiple movable furniture parts, arranged one above the other, in different positions,

[0040] FIG. 2 is a perspective view of a movable furniture part with two pull-out guides together with drive device,

[0041] FIG. 3 is a perspective view of a movable furniture part together with pull-out guide,

[0042] FIG. 4 shows a detail from FIG. 3,

[0043] FIGS. 5-10 is a top view of the movable furniture part together with pull-out guide with the depth adjustment means in different positions in each case, and details of the depth adjustment means,

[0044] FIG. 11 is a perspective view of a pull-out guide with a first variant of the drive device,

[0045] FIG. 12 shows a detail from FIG. 11,

[0046] FIG. 13 shows a vertical section through the pull-out guide as per FIG. 11,

[0047] FIG. 14 shows a detail from FIG. 13,

[0048] FIG. 15 is a perspective view of a pull-out guide, in the closed position, with a second variant of the drive device,

[0049] FIG. 16 shows a detail from FIG. 15,

[0050] FIG. 17 shows the pull-out guide as per FIG. 15 in an open position,

[0051] FIG. 18 shows a detail from FIG. 17,

[0052] FIGS. 19-38 are different illustrations, perspectives, sections and details of a first embodiment example of the depth adjustment means,

[0053] FIGS. 39-45 are different illustrations, perspectives, sections and details of a second embodiment example of the depth adjustment means, and

[0054] FIGS. 46-49 are different illustrations, perspectives and details of a third embodiment example of the depth adjustment means.

DETAILED DESCRIPTION OF THE INVENTION

[0055] 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).

[0056] 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 however—by contrast to FIG. 1—attached 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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).

[0062] 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 means 7, which is installed on the drawer rail 5, is illustrated.

[0063] FIG. 4 shows the detail circled in FIG. 3, on an enlarged scale. The main components of the depth adjustment means 7 can thus be seen. This depth adjustment means 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.

[0064] 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 means 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 means 7 and of the drive device 6.

[0065] 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.

[0066] If the depth adjustment means 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] 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. By contrast, in FIG. 17, the stop element 72 is spaced apart, and thus detached, from the stop counterpart 60.

[0074] 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.

[0075] 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.

[0076] FIGS. 19 to 38 show a first embodiment example of a depth adjustment means 7 in different illustrations, perspectives, (partial) sections and details.

[0077] FIG. 19 shows the components of the depth adjustment means 7 in an exploded illustration.

[0078] 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.

[0079] 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.

[0080] 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.

[0081] 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 side - specifically on its lateral surface - the 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.

[0082] 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.

[0083] FIG. 20 illustrates the depth adjustment means 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.

[0084] FIG. 21 shows the same illustration as FIG. 20 once again.

[0085] 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.

[0086] 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.

[0087] The detail as per FIG. 23 originates from the perspective illustration of the depth adjustment means 7 of FIG. 24.

[0088] FIGS. 25 and 26 show the depth adjustment means 7, truncated in the center, from different perspectives.

[0089] 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.

[0090] FIG. 28 shows a detail, pertaining to FIG. 29, of the depth adjustment means 7.

[0091] 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.

[0092] FIG. 35 indicates a section through the depth adjustment means 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.

[0093] Rotating the adjustment wheel 73 about the axis of rotation D causes the depth adjustment means 7 to move into the position as per FIGS. 37 and 38.

[0094] FIG. 39 shows a further embodiment example of a depth adjustment means 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.

[0095] FIG. 40 illustrates the depth adjustment means 7 as per FIG. 39 in the assembled state.

[0096] FIGS. 41 to 43 illustrate the depth adjustment wheel 73 in different perspectives. The recesses 78 can be clearly seen in FIG. 41.

[0097] 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.

[0098] 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.

[0099] 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.

[0100] FIGS. 46 to 49 show a third embodiment example of the depth adjustment means 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.

[0101] 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

[0102] 1 Pull-out guide [0103] 2 Movable furniture part [0104] 3 Furniture carcass [0105] 4 Carcass rail [0106] 5 Drawer rail [0107] 6 Drive device [0108] 60 Stop counterpart [0109] 61 Ejection device [0110] 62 Carrier [0111] 63 Ejection carriage [0112] 65 Ejection energy storage mechanism [0113] 66 Locking device [0114] 67 Guide track [0115] 68 Locking peg [0116] 69 Retraction device [0117] 7 Depth adjustment means [0118] 71 Carrier [0119] 711 Base region [0120] 712 Holding lugs [0121] 713 Guide openings [0122] 714 Opening [0123] 72 Stop element [0124] 721 Projections [0125] 722 Spreading element [0126] 73 Depth adjustment wheel [0127] 74 Driver [0128] 75 Movement transmission region [0129] 76 External thread [0130] 77 Internal thread [0131] 78 Recess [0132] 79 Knurl [0133] 7a Latching stud [0134] 7b Latching depressions [0135] 7c Arresting element [0136] 8 Piece of furniture [0137] 10 Drawer container [0138] 11 Front panel [0139] 12 Drawer rail [0140] L Longitudinal axis [0141] OR Opening direction [0142] SR Closing direction [0143] OS Open position [0144] SS Closed position [0145] US Overpressed position [0146] D Axis of rotation

[0147] F Front panel gap