LIFT AND SLIDE MECHANISM

Abstract

The invention relates to a lift-and-slide device (10), in particular a lift-and-slide door or lift-and-slide window, with a frame (12) and a sash (16) which is movable relative to the frame (12) between an open position and a closed position along a sliding axis (z), and which is movable along a lifting axis (y) and relative to at least one carriage (20) supporting the sash (16) between a lowered position and a raised position, wherein at least one first locking element (44) connected to the frame (12) is provided and wherein a second locking element (34) is arranged on a part of the carriage (20) which is fixed along the lifting axis (z), wherein one of the locking elements (34, 44) has a T-shaped cross-section and the other locking element (44, 34) has a cross-section that is at least partially complementary to the T-shaped cross-section, in particular a C-shaped cross-section.wherein the second locking element (34) – in the closed position of the sash (16) and regardless of its position along the lifting axis (y) – engages under the at least one first locking element (44), so that the sash (16) is secured along the lifting axis (y) against being lifted beyond the raised position.

Description

[0001] The invention relates to a lifting and sliding device with features of the preamble of claim 1.

[0002] A lift-and-slide device is known, for example, from EP 2 476 829 A1. The lift-and-slide construction therein comprises, for burglary protection, a first locking element which is attached to a window frame, and a second locking element which is attached to a sash frame and which is movable relative to the window frame. The second locking element is designed as a locking pin which, when the sash frame is closed, penetrates a cavity in the first locking element (hollow profile). The cavity on the first locking element has a lower limit and an upper limit which serves as a lift-out protection for the sash-side locking pin. The locking pin can thus be moved within the space of the first locking element in accordance with the stroke between the lowered and raised positions of the sash frame.Further movement of the sash and locking pin beyond the raised position is to be blocked by the upper limit of the cavity. In addition to a comparatively complex structure, the disadvantage is that the locking elements must be precisely installed and adjusted during installation and after a settling phase of the lift-and-slide mechanism. This ensures that, when the sash is closed, the locking elements do not impede movement into the lowered and raised positions of the sash, while reliably preventing the sash from being raised beyond the raised position.

[0003] Another lift-and-slide device with a stationary frame and a sash that can be moved relative to it is known from EP 3 425 149 A1. This lift-and-slide device has a frame locking element, a carriage locking element, and a sash locking element. The frame locking element and the carriage locking element interact in the closed position of the sash such that the sash is secured against being lifted beyond the raised position (lifting out). The frame locking element and the sash locking element interact in the closed position of the sash and with the sash in the lowered position such that the sash is secured against being moved into the open position. The lift-and-slide device has a comparatively complex structure with a large number of components.

[0004] The invention is based on the object of providing a burglar-resistant lift-slide device with a structurally simple and stable structure.

[0005] The invention solves this problem by a lifting and sliding device with the features of claim 1.

[0006] The lift-and-slide device is a door or window arrangement which can be designed in particular as a lift-and-slide door or lift-and-slide window.

[0007] The lift-and-slide device comprises a (stationary) frame and a sash that can be moved relative to the frame between an open position and a closed position along a displacement axis (z). The lift-and-slide device can be configured for manual displacement of the sash by an operator (e.g., by grasping a handle) or for motorized displacement of the sash by a drive device. In the latter case, a drive device for moving the sash can be arranged on the lift-and-slide device, acting between the frame and the sash.

[0008] The sash is movable or displaceable between a lowered position and a raised position along a lifting axis (y) and relative to at least one carriage supporting the sash, preferably to two or more carriages supporting the sash. The lifting and sliding device can be designed for manual movement of the sash between a lowered position and a raised position by an operator or for motorized movement by a drive device. In the former case, a manually operable gear acting between the frame and sash can be provided, which an operator can actuate by means of a handle, e.g. by pivoting a handle. In the latter case, a motorized drive device for raising and lowering the sash can be arranged on the lifting and sliding device and acts between the frame and sash.

[0009] Furthermore, at least one first locking element (frame-locking element) connected to the frame is provided. Furthermore, a second locking element (carriage-locking element) is arranged on a part of the carriage that is stationary along the lifting axis. The stationary part of the carriage does not change its position along the lifting axis when the sash is raised or lowered.

[0010] One of the locking elements can have a T-shaped cross-section, and the other locking element can have a cross-section that is at least partially complementary to the T-shaped cross-section, preferably predominantly complementary, in particular a C-shaped cross-section. The locking elements are configured such that the second locking element - in the closed position of the sash and regardless of its position along the lifting axis (y) - engages beneath the at least one first locking element, so that the sash (in the closed position) is secured along the lifting axis against lifting beyond the lowered position (possibly additionally with a play between the first locking element and the second locking element).

[0011] In other words, the locking elements are configured such that the second locking element engages beneath the at least one first locking element—in the closed position of the sash and regardless of its position along the lifting axis (y)—such that the sash (in the closed position) can be raised along the lifting axis (y) from the lowered position, if at all, only by a play existing between the first locking element and the second locking element. This play is in particular less than 1 mm (millimeter), preferably less than 0.8 mm, more preferably less than 0.6 mm, most preferably less than 0.5 mm, thus only a few tenths of a millimeter.

[0012] The proposed design creates a burglar-resistant lift-and-slide system with a structurally simple and stable construction. The locking elements, one of which has a T-shaped cross-section and the other an at least partially complementary cross-section, provide particularly stable burglar protection against the sash being lifted open when the sash is in the closed position. The locking element with the T-shaped cross-section is encompassed by the other locking element. This offers high resistance to burglary. The proposed design requires only a comparatively small number of components. This reduces assembly effort and time. Because the locking elements are attached directly to the frame or carriage, no pre-assembly of parts is required. Retrofitting the locking elements to existing lift-and-slide systems is also possible.

[0013] In a preferred embodiment, the undercut of the second locking element (on the first locking element) can occur with a play that is less than 10 percent, preferably less than 8 percent, more preferably less than 6 percent, and most preferably less than 5 percent, of the sash's lifting path between the lowered position and the raised position. This contributes to a compact design of the locking elements, which reduces material and installation space requirements. In addition, a potential lifting movement of the sash (burglary attempt) is practically prevented from the outset. In a specific embodiment of the lift-slide device, the lifting path can be, for example, 7 mm, whereby the play between the locking elements is only a few tenths of a millimeter, as explained above.

[0014] Advantageously, the locking elements can be positioned such that, when the sash is closed, they engage with each other along the sliding axis (z), particularly at the rear end of the sash (located in the center of the frame). This contributes to good burglary protection, as it secures the rear end of the sash, which is usually less secure than the front end of the sash (lockable to the frame).

[0015] Specifically, the locking elements can be configured such that the locking element with a T-shaped cross-section is engaged from under or around the locking element with an at least partially complementary cross-section when the sash is in the closed position. Such a two-sided under-engagement or engagement ensures a particularly stable coupling of the locking elements and thus promotes high burglary protection.

[0016] Within the scope of a preferred embodiment, a groove, in particular a T-slot or a dovetail-shaped groove, can be formed on the second locking element (carriage-locking element), which extends along or parallel to the displacement axis (z), wherein the first locking element (frame-locking element) is received at least partially, preferably predominantly or completely, in the groove when the sash is in the closed position. This contributes to a particularly stable coupling of the locking elements when the sash is in the closed position. Furthermore, such grooves facilitate the production of the locking elements.

[0017] The second locking element (carriage locking element) can expediently have opposing groove edge sections (tapering the clear groove cross-section) that engage underneath the first locking element from opposite sides when the sash is in the closed position. This promotes coupling of the locking elements to one another. Thus, the groove edge sections, on the one hand, achieve an under-engagement or engagement with the first locking element (e.g., a head section of the first locking element) and, on the other hand, guide the first locking element (e.g., a shaft section of the first locking element).

[0018] Specifically, the first locking element can be designed as at least one mushroom-head pin attached to the frame. This is a construction element proven in hardware technology that can withstand high tensile and shear loads. Furthermore, it is a compact locking element (minimal material requirements and installation space). The mushroom-head pin can be screwed to the frame using a screw. The mushroom-head pin is designed and / or intended to correspond with or engage in the groove formed in the second locking element, in particular a T-slot. The use of several mushroom-head pins arranged one behind the other along or parallel to the displacement axis (z) and each screwed to the frame using a screw is also conceivable in principle.

[0019] Alternatively, the first locking element can have a locking body which extends with a T-shaped or dovetail-shaped cross-section (with a defined length) along or parallel to the displacement axis (z) and is fastened to the frame. This contributes to an even more stable coupling of the locking elements, since higher forces can be transmitted due to larger contact surfaces. The locking body can be screwed to the frame by means of one or preferably several screws. This contributes to a comparatively stable anchoring of the locking body to the frame. The locking body can in particular have three, preferably countersunk, through-holes for fastening (e.g. to the frame) by means of three screws.

[0020] In a preferred embodiment, the second locking element (carriage-locking element) can have a T-shaped cross-section with lateral projections, wherein the lateral projections each engage under the at least one first locking element (frame-locking element) when the sash is in the closed position. This also allows a stable coupling of the locking elements to be achieved, preventing the sash from being lifted beyond the raised position (lifting out), thus increasing burglary security.

[0021] Specifically, the lateral projections can each have a rectangular or trapezoidal cross-section. Projections with a rectangular cross-section are comparatively easy to manufacture. Projections with a trapezoidal cross-section can transmit even greater forces due to the comparatively large projection surface and a potentially resulting wedge effect. This can potentially further increase burglary resistance.

[0022] Conveniently, the lateral projections can each have a recess at their end facing the frame (downward along the direction of gravity, e.g., toward a bottom-side frame profile), each corresponding to a shoulder on the first locking element. The shoulder(s) each serve to support a lateral projection "from below." In addition to a guiding function when sliding the sash, the lateral projections can also be supported. The recess(es) each extend along or parallel to the sliding axis. The shoulder(s) each extend along or parallel to the sliding axis.

[0023] Advantageously, the first locking element (frame locking element) can have at least one or two overlapping sections, each of which overlaps one of the lateral projections of the second locking element when the sash is in the closed position. This allows a stable coupling of the locking elements, wherein the overlapping section(s) reliably prevents the sash from being lifted beyond the raised position. The overlapping sections are preferably arranged opposite one another so that the overlapping sections each encompass the lateral projections. The overlapping sections as a whole can form a substantially C-shaped geometry. Below the overlapping sections, a free space can be formed, preferably corresponding to, in particular complementing, the lateral projections of the second locking element.

[0024] The first locking element (frame-locking element) can expediently be constructed in multiple parts, in particular from two mirror-symmetrical parts. A multi-part design of the first locking element contributes to a space-saving construction, since the first and second locking elements do not have to be arranged one above the other, but can be arranged next to one another. In addition, assembly is simplified, since the two parts of the first locking element and the second locking element can be assembled in any order. A mirror-symmetrical design of the parts contributes to efficient production, as the number of different components can be reduced. The parts of the first locking element each have one or more passages through which the parts can be fastened to the frame using screws.

[0025] As already indicated, the first locking element can be attached to the frame, in particular by screwing it to the frame using one or more screws. This contributes to a structurally simple and particularly stable connection of the first locking element to the frame.

[0026] The invention is explained in more detail below with reference to the figures, in which identical or functionally identical elements are provided with identical reference numerals, if necessary, but only once. They show: Fig.1 shows an embodiment of a lifting and sliding device in a perspective view; Fig.2 shows an enlarged view of the Figure 1 marked section (Detail A); Fig.3a, the carriage of the lifting and sliding device in a perspective front view ( Figure 3a ) and a perspective rear view ( Figure 3b); Figure 4 shows a section through the carriage and the locking elements when mounted on the frame; Figure 5 shows a section of the frame of the lift-and-slide device with the first locking element mounted thereon in a perspective view; Figures 6-8 show the movement sequence when unlocking the lift-and-slide device and when lifting and sliding the sash, respectively, in an enlarged partial view; and Figure 9 shows an alternative design option for the locking elements in a sectional view through the carriage and locking elements when mounted on the frame.

[0027] An embodiment of a lifting and sliding device is shown in Figure 1shown in perspective and designated overall by the reference numeral 10. The device 10 has a stationary, building-side frame 12, into which an optional fixed wing 14 is integrated. The device 10 also has a movable wing 16, which can be moved along a displacement axis designated "z" between the Figure 1 shown closed position and an open position (not shown).

[0028] The wing 16 is lifted by means of a lifting device 28 (cf. Fig.3a ) can be moved between a lowered position and a raised position along a lifting axis designated "y" (cf. Fig.1 ). The lifting axis y runs vertically (along the direction of gravity g) and orthogonal to the (horizontal) displacement axis z.

[0029] The lifting device 28 is part of a carriage 20 (cf. Figures 3a and 3b) and is actuated by a motor or by a handle or a handle 18, for which purpose the handle 18 is moved from its Figure 1 shown upward position is pivoted by an angle of, for example, 90° or 180°.

[0030] This movement of the handle 18 is transmitted to the lifting device 28 via transmission elements known per se and therefore not shown. The lifting device 28 has an upwardly facing support surface 30, with which the wing 16 is supported and can thus be raised and lowered.

[0031] The carriage 20 has a part that is stationary relative to the lifting axis y. This part of the carriage 20 includes, for example, rollers 22, which, viewed in the direction of the lifting axis y, remain continuously in contact with floor-side rails 24 of the stationary frame 12, and cheeks 32 for supporting the rollers 22, which are also immovable viewed in the direction of the lifting axis y.

[0032] The lifting device 28 is arranged on the carriage 20 and in the Figures 3a and 3b shown in a lowered position relative to the lifting axis. Actuation of the lifting device 28 from this lowered position causes an upward lifting movement of the wing 30 and thus of the wing 16 (opposite the direction of gravity g).

[0033] A carriage locking element 34 is attached to the cheeks 32 of the carriage 20 and thus to a part of the carriage 20 that is not movable in the direction of the lifting axis y, which is sometimes referred to as a second locking element 34. The carriage locking element 34 preferably has a fastening section 36 for fastening to one cheek 32 or to both cheeks 32, as well as a locking section 38 that extends laterally away from the fastening section 36 (see also Figure 4). At the lower end of the fastening section 36, a triangular recess 37, for example, can be formed into which the rail 24 can penetrate.

[0034] In the example, the fastening section 36 and the locking section 38 form an L-shape (cf. Figure 4 ). The fastening section 36 and the locking section 38 are formed integrally with one another. The connection between the carriage locking element 34 and the part of the carriage 20 that is stationary along the lifting axis y, in particular with at least one cheek 32 of the carriage 20, is preferably made by means of a screw connection 40.

[0035] The frame 12 has a bottom-side frame profile 42, which serves for the arrangement and fastening of a frame-lattice element 44 which is stationary in all spatial directions and which is referred to in places as the first latch element 44 (cf. Figure 3a, 3b , 4 and 5). The frame-latch element 44 can be provided as a separate component and connected, in particular screwed, to the bottom-side frame profile 42.

[0036] The frame-latch element 44 has a latch body 45 with a T-shaped cross-section. In the installed state, the latch body 45 extends with the T-shaped cross-section along or parallel to the displacement axis z. The latch body 45 has a latch section 46 extending in a horizontal plane and a fastening section 48 with a tapered cross-section. In the example, the frame-latch element 44 is screwed to the frame 12 or to the base-side frame profile 42 by means of three screws 47, for which purpose corresponding passages for the screws 47 are formed in the latch body 45.

[0037] The carriage locking element 34 has, in particular in the locking section 38, a cross-section complementary to the T-shaped cross-section of the frame locking element 44, preferably a C-shaped cross-section (cf. Figure 4 ). On the carriage locking element 34, in particular on its locking section 38, a groove 50, here for example a T-slot 50, is formed, which extends along or parallel to the displacement axis z in the installed state. The frame locking element 44 is at least partially received in the groove 50 when the sash 16 is in the closed position. Thus, the frame locking element 44 can be located partially, predominantly, or completely in the groove 50 along the displacement axis z. At least the locking section 46 of the frame locking element 44 is received in the groove 50.

[0038] The frame locking element 44 has opposing groove edge sections 52 and 54 that taper the clear groove cross-section and engage underneath the frame locking element 44, in particular its locking section 46, from two opposite sides. The under-engagement of the carriage locking element 34 on the frame locking element 44 occurs with a clearance that amounts to less than 10 percent of the stroke of the sash 16 between the lowered and raised positions of the sash 16.

[0039] The carriage locking element 34 and the frame locking element 44 are positioned such that, when the sash 16 is in the closed position, they overlap one another along the displacement axis z at the rear sash end 16' (located in the center of the frame 12 when the sash 16 is in the closed position).

[0040] The proposed design has the effect that the carriage locking element 34 – in the closed position of the sash 16 and regardless of its position along the lifting axis y – engages under the frame locking element 44 in such a way that the sash 16 (in the closed position) can be raised along the lifting axis (y) from the lowered position, if at all, only by a clearance existing between the carriage locking element 34 and the frame locking element 44, as explained above. This creates an anti-lift device that contributes to increased burglary protection.

[0041] The Figures 6 to 8 illustrate the movement sequence when unlocking the lift-slide device 10 or when lifting and sliding the wing 16 starting from the closed position of the wing 16.

[0042] In Figure 6the sash 16 is in the closed position and is in the lowered position relative to the lifting axis z. The first locking element 44 and the second locking element 34 overlap along the displacement axis z, and the second locking element 34 engages below the first locking element 44 (CT connection engages with one another). Thus, apart from any play between the locking elements 34, 44, the sash 16 is secured along the lifting axis y against being lifted out of the lowered position. In other words, the sash 16 can be lifted along the lifting axis y from the lowered position, if at all, only by the play existing between the carriage locking element 34 and the frame locking element 44. A tamper-evident lifting of the sash 16 out of the lowered position is thus prevented.

[0043] In Figure 7the wing 16 has been raised relative to the lifting axis y by means of the lifting device 28, e.g., as a result of actuation by the handle 18, with the wing 16 still being in the closed position. When the wing 16 is raised, the carriage 20, apart from the component having the supporting surface 30 and coupled to the cheeks 32, moves forward (in Figure 7 (to the left). The first locking element 44 and the second locking element 34 are not overlapped along the displacement axis z. The second locking element 34 no longer engages under the first locking element 44 (CT connection released).

[0044] Figure 8shows a situation in which the sash 16 is in the raised position relative to the lifting axis y and has been displaced along the displacement axis z a short distance towards the open position, whereby the carriage 20 and the second locking element 34 have passed the (frame-fixed) first locking element 44. As shown, the locking elements 34, 44 only move relative to one another along the displacement axis z (horizontally) and must overlap or engage under one another when the sash 16 is in the closed position.

[0045] Figure 9 shows an alternative design option for the locking elements 34, 44 in a sectional view through carriage 20 and locking elements 34, 44 in the state mounted on the frame 12.

[0046] The lifting and sliding device 10 according to the present embodiment largely corresponds to the one described in connection with the Figures 1 to 8described embodiment, so that in order to avoid repetition, reference is made to the explanations there.

[0047] In contrast, the locking elements 34, 44 are designed differently (vice versa).

[0048] The carriage locking element 34 according to the present embodiment also has a fastening section 36 for fastening to one cheek 32 or to both cheeks 32 of the carriage 20, as well as a locking section 38. The carriage locking element 34 has a T-shaped cross-section with lateral projections 60, 62, wherein the lateral projections 60, 62 engage under the frame locking element 44. In the example, the lateral projections 60, 62 each have a trapezoidal cross-section (the surface of the projections facing away from the base profile 42 is angled).

[0049] The frame-latch element 44 is constructed in several parts, specifically from two mirror-symmetrical parts 44', 44'', each of which is fastened to the frame or to the base-side frame profile 42, in particular screwed together by means of screws 47. The frame-latch element 44 has an overlapping section 49, 49' on each of its parts 44', 44'', wherein the overlapping sections 49, 49' each overlap one of the lateral projections 60, 62. The frame-latch element 44 is designed at its overlapping sections 49, 49' to be complementary to the lateral projections 60, 62. Specifically, free spaces 51, 51' are formed on the overlapping sections 49, 49', each of which has a contour complementary to the lateral projections 60, 62.

[0050] The lateral projections 60, 62 each have a recess 53, 53' at their end facing the frame 12, in particular the bottom-side frame profile 42, which each correspond to a shoulder 55, 55' on the parts 44', 44" of the frame locking element 44. In the assembled state, the recess 53, 53' and the shoulders 55, 55' each extend along or parallel to the displacement axis z.

[0051] The present embodiment also achieves the effect that the carriage locking element 34 (with its lateral projections 60, 62) - in the closed position of the sash 16 and regardless of its position along the lifting axis y - engages under the frame locking element 44 (at its overlapping sections 49, 49') in such a way that the sash 16 (in the closed position) can be raised along the lifting axis (y) from the lowered position, if at all, only by a play existing between the carriage locking element 34 and the frame locking element 44, as explained above. This also implements a lifting protection that contributes to greater burglary protection.

Claims

1. Lift-and-slide device (10), in particular a lift-and-slide door or lift-and-slide window, with a frame (12) and a sash (16) which is displaceable relative to the frame (12) between an open position and a closed position along a displacement axis (z), which sash is movable along a lifting axis (y) and relative to at least one carriage (20) carrying the sash (16) between a lowered position and a raised position, wherein at least one first locking element (44) is provided which is connected to the frame (12) and wherein a second locking element (34) is arranged on a part of the carriage (20) which is stationary along the lifting axis (z), characterized in thatone of the locking elements (34, 44) has a T-shaped cross-section and the respective other locking element (44, 34) has a cross-section that is at least partially complementary to the T-shaped cross-section, in particular a C-shaped cross-section, wherein the second locking element (34) - in the closed position of the wing (16) and regardless of its position along the lifting axis (y) - engages under the at least one first locking element (44), so that the wing (16) is secured along the lifting axis (y) against being lifted beyond the lowered position.

2. Lifting and sliding device (10) according to claim 1, characterized in that the undercut of the second locking element (34) occurs with a play which is less than 10 percent of a stroke of the wing (16) between the lowered position and the raised position.

3. Lifting and sliding device (10) according to claim 1 or 2, characterized in thatthe locking elements (34, 44) are positioned such that, when the wing (16) is in the closed position, they engage with one another along the sliding axis (z), in particular at the rear wing end (16').

4. Lifting and sliding device (10) according to one of the preceding claims, characterized in that the locking elements (34, 44) are arranged such that the locking element with a T-shaped cross-section is engaged under or encompassed by the locking element with an at least partially complementary cross-section from two opposite sides in the closed position of the wing (16).

5. Lifting and sliding device (10) according to one of the preceding claims, characterized in thata groove (50), in particular a T-groove (50) or a dovetail-shaped groove, is formed on the second locking element (34), which extends along or parallel to the displacement axis (z), wherein the first locking element (44) is received at least in sections in the groove (50) when the wing (16) is in the closed position.

6. Lifting and sliding device (10) according to the preceding claim, characterized in that the second locking element (34) has opposing groove edge sections (52, 54) which engage under the first locking element (44) when the wing (16) is in the closed position.

7. Lifting and sliding device (10) according to one of the preceding claims, characterized in that the first locking element (44) is designed as at least one mushroom head pin fastened to the frame (12).

8. Lifting and sliding device (10) according to one of claims 1 to 6, characterized in thatthe first locking element (44) has a locking body (45) which extends with a T-shaped or dovetail-shaped cross-section along or parallel to the displacement axis (z) and is fastened to the frame (12).

9. Lifting-sliding device (10) according to one of claims 1 to 4, characterized in that the second locking element (34) has a T-shaped cross-section with lateral projections (60, 62), wherein the lateral projections (60, 62) each engage under the at least one first locking element (44).

10. Lifting and sliding device (10) according to the preceding claim, characterized in that the lateral projections (60, 62) each have a rectangular or trapezoidal cross-section.

11. Lifting and sliding device (10) according to one of the two preceding claims, characterized in thatthe lateral projections (60, 62) each have a recess (53, 53') at their end facing the frame (12), which each correspond to a shoulder (55, 55') on the first locking element (44).

12. Lifting and sliding device (10) according to one of the three preceding claims, characterized in that the first locking element (44) has at least one overlapping section (49, 49') which, when the wing (16) is in the closed position, overlaps one of the lateral projections (60, 62) of the second locking element (34).

13. Lifting and sliding device (10) according to one of the four preceding claims, characterized in that the first locking element (44) is formed in several parts, in particular from two mirror-symmetrical parts (44', 44").

14. Lifting and sliding device (10) according to one of the preceding claims, characterized in that the first locking element (44) is fastened to the frame (12), in particular is screwed to the frame (12).