Track fitting group for sliding doors and track system

Description

[0001] The invention relates to a track fitting group with at least two mutually parallel tracks for a sliding door system, with at least one Z-shaped support part which has a fastening leg, a vertical leg and a supporting leg and with at least one insertion part which can be encompassed by the support part at least in regions, wherein both the support part and the insertion part each have a constant cross-section along their entire length oriented in the longitudinal direction, a track system with at least one such track fitting group and with at least one further support part and / or at least one further insertion part and a piece of furniture with such a track system.

[0002] From DE 20 2020 101 165 U1 and EP 3 114 297 B1, track systems made from rolled sheet metal are known.

[0003] The present invention is based on the problem of developing a guide fitting for sliding doors that is stable even under changing operating loads.

[0004] This problem is solved by the features of the main claim. The wall thickness of the vertical leg is thinner in the area adjacent to the fastening leg than in the area adjacent to the supporting leg.

[0005] The raceway system is designed so that the end faces of two support parts contact each other at a common joint and / or the front faces of two insert parts abut each other at a common contact point. Each joint is offset longitudinally from a front face, and each contact point is offset longitudinally from an end face.

[0006] The support part of the track fitting assembly is inherently rigid due to its geometric design. This eliminates the need for a vertical support surface on the furniture. The multi-part construction of the track fitting assembly also prevents deformation of the track fitting assembly under both static and dynamic operating loads.

[0007] When the track fitting assembly is expanded to form a track system, the longitudinally offset support parts and insert parts further stiffen the track fitting assembly. The static and dynamic strength of the track fitting assembly is thus independent of its overall length. The high rigidity also enables quiet operation of the multi-part system.

[0008] Further details of the invention emerge from the subclaims and the following description of schematically illustrated embodiments. Figure 1: Piece of furniture with sliding door system; Figure 2: Track fitting group of the piece of furniture according to Figure 1 ; Figure 3: Front view of the raceway fitting group from Figure 1 ; Figure 4: Support part of the raceway fitting group according to Figure 2 ; Figure 5: Insert part of the track fitting group according to Figure 2 ; Figure 6: Variant of a piece of furniture with a sliding door system; Figure 7: Track fitting group of the piece of furniture according to Figure 6 ; Figure 8: Front view of the raceway fitting group from Figure 6 ; Figure 9: Support part of the raceway fitting group according to Figure 6 ; Figure 10: Insert part of the raceway fitting group according to Figure 6 .

[0009] The Figures 1 - 6show a piece of furniture (1) with a sliding door system and individual parts thereof. The piece of furniture (1), e.g., a cupboard, has two sliding doors (3, 4) that can be moved parallel to one another in a longitudinal direction (5). These sliding doors (3, 4) can, for example, be individually motor-driven or manually movable. It is also conceivable to arrange more than two sliding doors (3, 4) on the body of the piece of furniture (1).

[0010] During movement, the sliding doors (3, 4) are guided along a track fitting group (10) arranged, for example, on the ceiling (2) of the piece of furniture (1). The track fitting group (10) shown has, for example, two adjacent, parallel tracks (71, 72). In this exemplary embodiment, the two tracks (71, 72) have the same tangential plane lying normal to a vertical line and the same length. However, it is also conceivable to arrange the two tracks (71, 72), for example, at different heights. The two tracks (71, 72) can also have different lengths oriented in the longitudinal direction (5). The length of each track (71; 72) is longer than the sliding door (3; 4) guided along this track (71; 72). For example, each of the sliding doors (3; 4) has two guide roller groups (6, 7) for guidance along the respective track (71; 72).These guide roller groups (6, 7) are attached to the upper area of ​​the respective sliding door (3; 4).

[0011] The track fitting group (10) comprises at least one support part (21; 22, 23) and at least one insertion part (41; 42) encompassed at least partially by the support part (21; 22; 23). The individual support parts (21; 22; 23) and / or the individual insertion parts (41; 42) can have different individual lengths. The total length of the track fitting group (10) corresponds at least to the sum of the individual lengths of the support parts (21; 22; 23) and at least to the sum of the individual lengths of the insertion parts (41, 42). However, the total length of the track fitting group (10) can also be 25% longer than the smaller of these sums.

[0012] In the Figure 2The raceway fitting group (10) is shown in the form of a raceway system (11). The raceway system (11) has at least two support parts (21, 22; 22, 23; 21, 23) and / or at least two insert parts (41, 42). In this exemplary embodiment, the raceway system (11) has three support parts (21, 22, 23) and two insert parts (41, 42) connected to them. In this exemplary embodiment, the sum of the lengths of all support parts (21, 22, 23) corresponds to the sum of the lengths of all insert parts (41, 42). However, the total length of the raceway system (11) can also lie within the above-mentioned tolerance range. In the exemplary embodiment, the length of a support part (21; 22; 23) is two-thirds the length of an insert part (41; 42). For example, the total length of the track system (11) is two meters.

[0013] The Figure 3shows a front view of a track fitting group (10). The support part (21; 22; 23) is Z-shaped. It has a fastening leg (24) with which it is fastened, for example, to the ceiling (2) of the piece of furniture (1). A vertical leg (27) is connected to the fastening leg (24). When the track fitting group (10) is installed, this vertical leg (27) lies in front of the front of the furniture body. Adjacent to the lower end of the vertical leg (27) is a supporting leg (32). This supports the vertical leg (27) and projects in the transverse direction (8) away from the furniture body.

[0014] The insert part (41; 42) is located in the support part (21; 22; 23). The insert part (41; 42) is positively received in the support part (21; 22; 23) except for one axial degree of freedom oriented in the longitudinal direction (5). In this exemplary embodiment, both raceways (71, 72) are formed in the insert part (41; 42). The two raceways (71; 72) are designed, for example, identically to one another.

[0015] The Figure 4shows a single support part (21; 22; 23). The support part (21; 22; 23) has a constant cross-sectional profile and a constant cross-sectional area over its length. The cross-sectional plane is oriented normal to the longitudinal direction (5). The support part (21; 22; 23) can be made of metal, e.g. aluminum, plastic, a composite material, etc. For example, it is produced by means of a primary forming process, e.g. an extrusion or strand drawing process, an extrusion process, etc. The individual support part (21; 22; 23) is delimited in the longitudinal direction (5) by two end faces (35). The two, for example, flat end faces (35) of a support part (21; 22; 23) can be aligned parallel to one another. However, they can also enclose an angle of up to 5 degrees, whereby the apex line of this angle lies above the support legs (32).

[0016] The fastening leg (24) has an at least approximately cuboid shape. Its width oriented in the transverse direction (8) is, for example, 1% of the length of the track fitting group (10). Its thickness is, for example, 0.1% of the stated length. The fastening leg (24) has, for example, three fastening holes (25). These fastening holes (25) are through holes with a cylindrical, frustoconical and / or countersunk cross-section. To fasten the track fitting group (10) to the furniture body, cylinder heads, hexagon screws, countersunk screws, etc. are inserted into the fastening holes (25). However, the track fitting group (10) can also be fixed to the furniture body by gluing, by means of form-fitting engagement, clamping, clipping, locking, spring-loaded spreading, etc.

[0017] The vertical leg (27) has a wedge-shaped cross-section. Its thickness, i.e. the wall thickness of the vertical leg (27), increases from the fastening leg (24) to the support leg (32). In the exemplary embodiment, the thickness of the vertical leg (27) in the area adjacent to the fastening leg (24) corresponds to the thickness of the fastening leg (24). In the area adjacent to the support leg (32), the thickness of the vertical leg (27) is, for example, 1.75 times the thickness of the area adjacent to the fastening leg (24). In the exemplary embodiment, the increase in thickness from the fastening leg (24) to the support leg (32) is continuous and with a constant gradient. However, it is also conceivable for the increase to be progressive, degressive, or with discontinuous sections.With such a design of the vertical leg (27), the individual thickness value along a coordinate axis of an imaginary coordinate system oriented in the height direction (9) is, for example, greater than or equal to the thickness with a linear increase. The transitions from the vertical leg (27) to the fastening leg (24) and the support leg (32) are rounded. In the exemplary embodiment, the height of the vertical leg is approximately 3% of the length of the track fitting assembly (10).

[0018] The rear side (28) of the vertical leg (27) facing the furniture body lies in a normal plane to the plane of a support surface (26) of the fastening leg (24). The guide side (29) facing away from the furniture body has a wrap-around strip (31). This is oriented in the direction of the support leg (32). The thickness of the angled wrap-around strip (31) is, for example, three-quarters of the thickness of the fastening leg (32). The distance of the wrap-around strip (31) from the plane of the support surface (26) is, for example, 0.4% of the length of the track fitting group (10).

[0019] The support leg (32) is oriented in the transverse direction (8). Its width oriented in the transverse direction (8) corresponds, for example, to the width of the fastening leg (24). At the transition to the vertical leg (27), the thickness of the support leg (32) is, for example, the thickness of the vertical leg (27). The thickness of the support leg (32) at its free end corresponds, for example, to the thickness of the fastening leg (24). At its free end, the support leg has an engagement strip (33). This projects upwards out of the support leg (32). Between the vertical leg (27) and the engagement strip (33), the support leg (32) has a T-rail (34). This also projects upwards out of the support leg (32). The T-rail (34) is, for example, designed symmetrically to a vertical central longitudinal plane.

[0020] In the Figure 5an insert part (41; 42) is shown. The insert part (41; 42) can be made of the same material as the carrier part (21; 22; 23). However, it can also be made of one of the other materials mentioned in connection with the carrier part (21; 22; 23). The insert part (41; 42) is produced using one of the manufacturing processes mentioned in connection with the carrier part (21; 22; 23). The insert part (41; 42) also has the same cross-section and a constant cross-sectional profile over its entire length. The individual insert part (41; 42) is delimited in the longitudinal direction (5) by two front surfaces (44). These front surfaces (44) can be designed and arranged relative to one another in the same way as the end surfaces (35) of the individual carrier part (21; 22; 23).

[0021] In this embodiment, the insertion part (41; 42) is L-shaped in cross-section. It has a holding leg (43) and a track leg (51). The holding leg (43) and the track leg (51) are oriented at least approximately at right angles to each other. The holding leg (43) is plate-shaped. In the illustration of the Figure 3 It lies parallel to the guide side (29) of the support part (21; 22; 23). In this illustration, it engages under the wraparound strip (31) of the vertical leg (27) and rests on the supporting leg (32). In this embodiment, the thickness of the retaining leg (43) is 80% of the thickness of the fastening leg (24) of the support part (21; 22; 23).

[0022] In this exemplary embodiment, the track leg (51) has both an inner track (71) and an outer track (72). In a design of the track fitting group (10) with more than two tracks (71, 72), the insertion part (41; 42) can have additional tracks (71; 72). The insertion part (41; 42) has at least the outermost track (72). The width of the track leg (51) in the transverse direction (8) is, for example, 90% of the width of the support leg (32).

[0023] The distance between the two tracks (71, 72) is, for example, half the width of the track leg (51). In the exemplary embodiment, the individual track (71; 72) has a V-shaped, groove-like cross-section. The opening angle is, for example, 120 degrees. The base (73) of the individual track (71; 72) is curved. However, it is also conceivable to design the tracks (71; 72) so that they are raised relative to the track leg (51). A different design of the individual tracks (71; 72) is also conceivable. The tracks (71; 72) are delimited laterally by means of limiting webs (74). The height of the individual limiting web (74) is, for example, 90% of the thickness of the fastening leg (24).

[0024] On its underside (52), the track leg (51) has an engagement groove (53) in the outer area for receiving the engagement strip (33). The engagement groove (53) is defined by a downwardly projecting overlapping web (54) which, after assembly, engages around the support leg (32). This engagement can be subject to play. For example, approximately centrally on its underside (52), the track leg (51) has a T-slot (55) oriented in the longitudinal direction (5) for receiving the T-rail (34). This positive connection centers and secures the position of the insertion part (41; 42) relative to the support part (21; 22; 23), at least in the transverse direction (8) and in the vertical direction (9). Any moments that may occur are also supported in all directions by means of this moment-resistant connection. The underside (51) of the track leg (51) is thus complementary to the upper side of the support leg (32).

[0025] During assembly of the track fitting assembly (10), an insert part (41; 42) is inserted into a support part (21; 22; 23). This occurs in the longitudinal direction (5). The joining process involves putting them together by sliding them together. The support part (21; 22; 23) and the insert part (41; 42) engage with each other in such a way that all degrees of freedom, except for the axial assembly degree of freedom, are blocked by a positive fit. If necessary, the support part (21; 22; 23) and the insert part (41; 42) can be fixed relative to each other in the axial direction after assembly.

[0026] A track fitting assembly (10) that is longer than the length of a support part (21; 22; 23) and / or an insertion part (41; 42) can be designed as a track system (11). At least one insertion part (41; 42) has a different length than a support part (21; 22; 23). In the exemplary embodiment, the two components have the aforementioned length ratios to each other. The individual insertion part (41; 42) is longer than the individual support part (21; 22; 23).

[0027] During assembly of this track system (11), first an insertion part (21; 22; 23) and a support part (41; 42) are joined together, for example, in such a way that a first front surface (44) of a first insertion part (41; 42) is flush with a first end surface (35) of a first support part (21; 22; 23). Subsequently, a further support part (22; 23; 21) is connected to the insertion part (41; 42). After joining a further insertion part (42; 41) and a third support part (23; 21; 22), the Figures 1 and 2The raceway fitting group (10) shown is assembled in the design of a raceway system (11). In this raceway system (11), two support parts (21, 22; 22, 23) contact each other at a common joint (36). The two support parts (21, 22; 22, 23) each bear against each other with their end faces (35). This contact can be a point contact, a line contact, or a surface contact, depending on the design of the end faces (35). Furthermore, two insert parts (41, 42) bear against each other with their front faces (44). The contact between these two front faces (44) forms a contact point (45) of the insert parts (41, 42). The contact point (45) can also be designed as a point, line, or surface. After assembly, these contact points (45) of the insertion parts (41, 42) are offset in the longitudinal direction (5) from the joint points (36) of the support parts (21, 22; 22, 23).In the exemplary embodiment, this offset in the longitudinal direction (5) amounts to half the length of a support part (21; 22; 23). The size of the axial offset is, for example, between 10% and 90% of the length of the shortest of the support parts (21; 22; 23) and insert parts (41; 42). In such an arrangement, each butt joint (36) of the support parts (21, 22; 22, 23) is offset in the longitudinal direction (5) relative to each front surface (44) of one of the insert parts (41; 42). At the same time, each contact point (45) of two insert parts (41, 42) is offset in the longitudinal direction (5) relative to each end surface (35) of a support part (21; 22; 23).

[0028] After assembling the track fitting group (10), it can be mounted on the piece of furniture (1). The fastening leg (24) is placed, for example, on the ceiling (2) of the piece of furniture (1) and fastened as described above. After this assembly, the vertical leg (27) hangs downwards, covering, for example, the upper area of ​​the furniture body. Due to the inherent rigidity of the track fitting group (10), there is no need to attach the vertical leg (27) to the front of the ceiling (2). The front of the ceiling (2) can therefore be left unmachined.

[0029] The sliding doors (3, 4) are suspended in the track fitting group (10) in such a way that the guide roller groups (6, 7) of a sliding door (3; 4) with their rollers are located together in a track (71; 72). For example, the lower area of ​​the individual sliding door (3; 4) can be supported on the furniture body. A sliding or roller guide for the lower area of ​​the sliding door (3; 4) on the furniture body is also conceivable. In the case of a sliding guide, this can be designed on one side, for example as a contact guide on the base part of the furniture body. Such a contact guide can be arranged, for example, as a strip oriented in the longitudinal direction (5) with a vertical extension on the base part.

[0030] After the sliding doors (3; 4) are hung, the weight of the sliding doors (3; 4) loads the track fitting assembly (10). The cross-section design of the track fitting assembly (10) prevents bending of the track fitting assembly (10) both in a plane normal to the longitudinal direction (5) and in a vertical plane containing the longitudinal direction (5).

[0031] To open and close the piece of furniture (1), the sliding doors (3; 4) are moved relative to the furniture body. The rollers of the individual sliding doors (3; 4) are rolled and / or rolled over the contact points (45). A maximum of one roller rolls over a contact point (45) at a time. Due to the firm connection between the support parts (21, 22, 23) and the insert parts (41, 42), the contact points (45) are gap-free even under load. Only low running noise is generated. The fact that the insert part (41; 42) wraps around the support part (21; 22; 23) by means of the overlapping web (54) also prevents injuries to the fitter or operator.

[0032] The Figures 6 - 10show a variant of the track fitting assembly (10) in the form of a track system (11). Like the first embodiment, the track system (11) shown has three support parts (21, 22, 23) and two insert parts (41, 42). This track system (11) can also have a different number of support parts (21, 22, 23) and / or insert parts (41, 42). This allows the track system (11) to be adapted to different installation lengths.

[0033] The individual support part (21; 22; 23), cf. the Figures 7 - 9 , is also Z-shaped in this embodiment. It can be made of the same materials as the one in the Figures 1 - 4 The carrier part (21; 22; 23) shown may also be made of the same primary forming process.

[0034] The fastening leg (24) corresponds in its geometric dimensions and structure to the fastening leg (24) of the first exemplary embodiment. The fastening leg (24) transitions into the vertical leg (27) in an arc of constant thickness. The height of the vertical leg (27) in this exemplary embodiment is also, for example, 8% of the length of the individual support part (21; 22; 23). The thickness of the vertical leg (27) at the transition to the fastening leg (24) corresponds, for example, to the thickness of the fastening leg (24). From here, the wall thickness of the vertical leg (27) in the exemplary embodiment increases, for example, to twice its size in the region of the transition to the support leg (32). The increase in thickness is, for example, linear. In this exemplary embodiment, the vertical leg (27) is designed without a wrap-around strip (31).

[0035] The transition from the vertical leg (27) to the supporting leg (32) is designed with a large radius. In the exemplary embodiment, a longitudinal opening (38) is formed in the transition area (37).

[0036] The supporting leg (32) has, for example, the same width as the fastening leg (24). It has an inner raceway (71). This raceway (71) is designed, for example, like the inner raceway (71) of the first exemplary embodiment of the raceway fitting group (10). In a design of the raceway fitting group (10) with more than two raceways (71, 72), a further raceway (72; 71) adjacent to the inner raceway (71) can also be part of the support part (21; 22; 23). A wrap-around hook strip (39) is formed next to the outermost raceway (71) of the support part (21; 22; 23). This wrap-around hook strip encompasses an engagement space (61). The supporting leg (32) is tapered towards its outer end.

[0037] The insert part (41; 42), cf. the Figures 8 and 10 , in this embodiment, has only the track leg (51). On its inner side facing the vertical leg (27), the insertion part (41; 42) has a rear gripping strip (56). In the assembled state, this engages in the engagement space (61) behind the encompassing hook strip (39) and thus secures the position of the insertion part (41; 42) relative to the support part (21; 22; 23). On its upper side, the insertion part (41; 42) has a track (72). In the illustrations of the Figures 7 and 8 This is an outer raceway (72). This raceway (72) is designed, for example, like the inner raceway (71) of the raceway fitting assembly (10). It is also conceivable to design the insert part (41; 42) with additional raceways (71, 72) adjacent to and parallel to the outer raceway (72).

[0038] At its outer end, the insertion part (41; 42) has a downwardly projecting overlapping web (54). When the track fitting assembly (10) is assembled, this overlapping web engages the supporting leg (32) of the carrier part (21; 22; 23). It also closes off the track fitting assembly (10) to the outside.

[0039] The assembly of the track fitting group (10) and the track system (11) is carried out as described above. The assembly and operation of the track fitting group (10) of this embodiment also corresponds to the first embodiment.

[0040] Combinations of the individual embodiments are also conceivable, provided they fall within the wording of the claims. List of reference symbols:

[0041] 1Piece of furniture 2Ceiling 3Sliding door 4Sliding door 5Longitudinal direction 6Guide roller group 7Guide roller group 8Transverse direction 9Height direction 10Race track fitting group 11Race track system 21Support part 22Support part 23Support part 24Mounting leg 25Mounting holes 26Contact surface of (24) 27Vertical leg 28Rear of (27) 29Guide side 31Wrap-around strip 32Supporting leg 33Engagement strip 34T-rail 35End face 36Joint 37Transition area 38Longitudinal opening 39Wrap-around hook strip 41Insertion part 42Insertion part 43Holding leg 44Front face 45Contact point 51Track leg 52Underside of (51) 53Engagement groove 54Overlap web 55T-slot 56Rear grip strip 61 Intervention room 71Raceway, inner raceway 72Raceway, outer raceway 73Bottom of (71, 72) 74Limiting webs

Claims

1. A track fitting assembly (10) with at least two mutually parallel tracks (71, 72) for a sliding door system, with at least one Z-shaped carrier part (21; 22; 23), which comprises a fastening leg (24), a vertical leg (27) and a support leg (32), and with at least one insertion part (41; 42), around which the carrier part (21; 22; 23) can engage at least in some sections, wherein the carrier part (21; 22; 23) and insertion part (41; 42) each have a constant cross-section along their entire length orientated in the longitudinal direction (5), characterised in that - the wall thickness of the vertical leg (27) is thinner in the region adjacent to the fastening leg (24) than in the region adjacent to the support plate (32).

2. The track fitting assembly (10) according to claim 1, characterised in that the wall thickness of the vertical leg (27) constantly increases from the fastening leg (24) to the support leg (32).

3. The track fitting assembly (10) according to claim 1, characterised in that the maximum wall thickness of the carrier part (21; 22; 23) is greater than one and a half times the minimum wall thickness of the carrier part (21; 22; 23).

4. The track fitting assembly (10) according to claim 1, characterised in that the overall length of the track fitting assembly (10) corresponds at least to the sum of the individual lengths and at most to 1.25 times the sum of the individual lengths of all the carrier parts (21; 22; 23) and also at least to the sum of the individual lengths and at most to 1.25 times the sum of the individual lengths of all the insertion parts (41; 42) .

5. The track fitting assembly (10) according to claim 1, characterised in that the carrier part (21; 22; 23) comprises at least one T-rail (34) or at least one griparound hook rail (39) for securing in some sections the position of the insertion part (41; 42) relative to the carrier part (21; 22; 23).

6. The track fitting assembly (10) according to claim 1, characterised in that the carrier part (21; 22; 23) comprises at most all the tracks (71) except for an outer track (72).

7. The track fitting assembly (10) according to claim 1, characterised in that the insertion part (41; 42) has at least one track (71; 72).

8. The track fitting assembly (10) according to claim 7, characterised in that at least one track (72) of the insertion part (41; 42) is an outer track (72) of the track fitting assembly (10).

9. The track fitting assembly (10) according to claim 1, characterised in that the insertion part (41; 42) comprises at least one T-groove (55) and at least one rear-grip rail (56) for gripping behind the carrier part (21; 22; 23) in some sections.

10. The track fitting assembly (10) according to claim 1, characterised in that the carrier part (21; 22; 23) and the insertion part (41, 42) interlock in a formfitting manner and block at least five degrees of freedom.

11. A track system (11) with at least one track fitting assembly (10) according to claim 1 and with at least one further carrier part (21; 22; 23) and / or at least one further insertion part (41; 42), characterised in that - the end faces (35) of two carrier parts (21, 22; 22, 23) make contact at any common abutment point (36) and / or the front faces (44) of two insertion parts (41, 42) abut against one another at a common contact point (45), - each abutment point (36) is offset in the longitudinal direction (5) with respect to a front face (44) and - each contact point (45) is offset in the longitudinal direction (5) with respect to an end face (35).

12. The track system (11) according to claim 11, characterised in that the sum of the lengths of all the carrier parts (21, 22, 23) corresponds to the sum of the lengths of all the insertion parts (41, 42).

13. The track system (11) according to claim 11, characterised in that at least one carrier part (21; 22; 23) and at least one insertion part (41; 42) have different lengths.

14. A piece of furniture (1) with a track system (11) according to claim 11.