ES2815929T3 - Retraction device for sliding elements - Google Patents

Abstract

Retraction device, in particular for sliding elements, drawers or sliding doors with a box (12), which houses a damping element (30) and a coupling element (20), the coupling element (20) being able to be adjusted in a slot guide (12.2) of the box (12) between an inserted position and an extended position, having connected to the coupling element (20) a tensioning spring (35) that performs the prestressing of the coupling element (20) in the extended position towards the inserted position, the coupling element (20) carrying on a support (21) a spring element (23) that can be deflected, and the coupling element (20) having a first and a second stops (24 and 25) which are arranged at a distance from each other, characterized in that the second stop (24) is carried by a spring element (23), in that the spring element (23) can be deflected in an adjustment direction which extends essentially in the direction of rotation of the coupling element (20), and by that the guide rail (12.2) has two grooved guides, which are inserted in two walls of the box parallel to each other (12.4) of the box (12).

Description

DESCRIPTION

Retraction device for sliding elements

The invention relates to a retraction device with a box, which houses a damping element and a coupling element, the coupling element being adjustable in a guide slot of the box between an inserted position and an extended position, having been connected to the element. of coupling to a tensioning spring that performs the prestressing of the coupling element in the extended position in the direction of the inserted position, the coupling element carrying a deflectable spring element in a support, and presenting the coupling element (20 ) a first and a second stop that are arranged spaced apart.

A retraction device is known from DE 202004 018 189 U1. From EP 1658785 A1 a retraction device is known. In that case, a damping element having a damping cylinder in which a piston can be regulated relative to a damping fluid was installed in a case. A piston rod is attached to the piston.

The piston rod is attached at its free end to a guide shoe. This can be adjusted linearly in a guide rail of the box. The guide shoe has an extension that is inserted into a housing of a coupling piece in such a way that a rotatable housing is formed between these two pieces. The coupling piece can thus be pivoted in the extended position with respect to the guide shoe to a folded position. In the folded position, the coupling piece is ready to grip a driver, for example a sliding door. The grasped driver is then brought with the coupling piece to the inserted position.

If due to a malfunction the coupling part is in the inserted position but the driver is not inserted into the coupling part, the entire retraction device has to be adjusted again and possibly removed.

Document WO 2006050510 A2 discloses a retraction device for sliding elements with a damping element and a coupling element. The coupling element is adjustable between an inserted position and an extended position. The coupling element is rotatably coupled to a skid. A spring is inserted into the shoe which is held by its end remote from the shoe in the case of the retraction device. The shock absorber is supported relative to the skid via a connecting arm. The connecting arm is guided by means of two guide extensions in an arc-shaped guide rail. The shock absorber 70 includes a thrust spring that acts on the piston rod of the shock absorber and performs a prestressing of the connecting arm with respect to the skid. The prestressing guide known from document WO 2006050510 A2 has a relatively complex construction that leads to a high expenditure of parts and assembly.

Document WO 2005/055767 A1 describes a retraction device for drawers with a damping element and a coupling element. The coupling element is adjustable between an inserted position and an extended position. A tensioning spring pre-tensiones the coupling element in the extended position in the direction of the inserted position. The coupling element has a bead piece that can be deflected elastically. Furthermore, a pocket is provided in the coupling element in which the damping element is inserted. The damping element has a toothed wheel that meshes with a toothing of a housing of the retraction device. A rotation damper of the damping element is connected to the gear wheel. These retraction devices generate considerable noise during operation, which in particular is produced by the toothed connection between the gear wheel and the gear of the case.

Document WO 2008/071168 A1 discloses another retraction device for drawers.

Known retraction devices consist of mass-produced components that are used in large quantities in drawers. The retraction devices are subjected to different intensities depending on the size and weight of the drawers. When a drawer is heavily loaded, inserting the drawer applies a great force to the coupling element, which must be safely picked up and removed.

Object of the invention is to create a retraction device of the type mentioned at the beginning, which guarantees high operational safety with reduced expenditure on parts and assembly.

This object is solved due to the fact that the second stop is carried by the spring element, that the spring element can be deflected in a regulating direction that extends essentially in the direction of rotation of the coupling element, and that the guide link has two grooved guides that are inserted in two walls of the box parallel to each other of the box.

When the driver is located outside the coupling element which is in the retracted position, it can be pushed towards the coupling element. Then it deflects the spring and is back in its correct position.

If necessary, the retraction device can also be designed in such a way that it can optionally be inserted on both sides of the sliding element to be guided. In this case, the spring element is always deflected in the direction of the interior space of the box.

Advantageous configuration variants of the invention are described in the dependent claims.

When it is foreseen that the coupling element is guided in an adjustable manner by means of the journal in the guide collet, and that the axis of rotation of the coupling element passes through the journal, the guide of the coupling element in the guide rail.

In that case, a further reduction in the waste of parts can be achieved, when it is provided that the journal connects the coupling element with an extension of the piston rod. The pin can then be a separate component part or be integrally formed with the coupling element or with the piston rod.

A possible variant of the invention can be such that the coupling element has a spring support to which the tensioning spring is directly coupled at a distance and eccentric with respect to the axis of rotation of the rotary bearing. Since the spring action point corresponds to the coupling element, a tipping moment can be generated. This ensures that the coupling element in the extended position can be pulled without difficulty to the folded position.

Safe driving without the danger of tipping over of the coupling element can be achieved with little expense because the guide rail has two grooved guides that are inserted in two walls of the box parallel to each other, and because the coupling element is guided between these two walls. of the box in the grooved guides, by means of a journal in each case.

A possible variant of the invention can be such that the coupling element carries at least one guide element which is guided in the guide chute and in the folded extended position rotates inserting itself into an intake of the guide chute.

A further reduction of the partial expense can be achieved because the spring element is connected integrally with the coupling element.

The invention is explained in greater detail below by means of an exemplary embodiment represented in the drawings. Shows:

Figure 1: a retraction device in side view with a coupling element in an extended position;

Figure 2: the representation according to Figure 1, but with the coupling element in the inserted position;

FIG. 3: the retraction damper according to FIG. 2 in a partial perspective representation;

Figure 4: in perspective view the coupling element with a connected damping element and a tensioning spring;

Figure 5: the representation according to Figure 4 in a modified functional position;

Figure 6: a horizontal section through the retraction device along section VI-VI illustrated in Figure 2 in partial representation;

Figure 7: in perspective representation two retraction devices arranged in a row with each other, and

Figure 8: two retraction devices arranged opposite each other, in plan view.

Figures 1 and 2 illustrate a retraction device 10 with a case 12, which is provided at its longitudinal ends with fixing projections 11. The fixing projections 11 have housings for screws. As can be more clearly distinguished in Figure 3, the box 12 has two box walls 12.3 parallel to each other, respectively extending between the fixing projections 11. In the fixing walls 12.4 guide collars 12.2 were inserted in the form of grooved guides. The two guide collars 12.2 were shaped identically. They have a linear guide section that continues in a widened housing 12.3. In the box 12 a coupling element 20 was placed in an adjustable manner. The conformation of the coupling element 20 made as an injection molding part can be seen in greater detail in Figures 4 and 5. As these drawings show, the coupling element Coupling 20 has a base part 21.1, in which a support 21 in the form of a cantilever is formed in the same piece.

The support 21 carries a spring element 23 shaped like a laminated spring. The spring element 23 has at its free end a second stop 24 with a stop surface 24.1. The second stop 24 ends with a locking lug 24.2 that extends towards the support 21. The second stop 24 makes contact against a rearward guide surface 26 of the support 21, as shown more clearly in Figure 6. At the same time At the same time, undercut surfaces are provided on the second bead 24 and the support 21, which in adjacent positions form a guide 24.3. This guide 24.3 prevents a deflection of the second stopper 24 perpendicular to the guide surface. Figure 4 shows the spring element 23 in its inserted position, Figure 5 in the extended position.

In the extended position, the locking lug 24.2 limits full expansion. When the locking lug 24.2 is released from engagement with the support 21, the spring element 23 is fully extended, so that the locking lug 24.2 is free above support 21 in a stretched position. This is the starting position, in which the coupling element is removed from the injection molding tool and can therefore be manufactured without undercutting.

The base part 21.1 also carries a first stop 25, which projects in the same direction as the second stop 24. As shown in Figure 5, the two stops 24, 25 are spaced from each other, so that they limit a space between them. accommodation.

The coupling element 20 can be coupled with a damping element in a directly rotatable manner. The damping element has a damping cylinder 30 in which a piston acting against the pressure of a damping fluid (eg gaseous or liquid) can move. The piston carries a piston rod 32, which protrudes from the damper cylinder.

The piston rod 32 has an extension 33 at its free end. This is rotatably supported in a housing 28 of the coupling element 20. Figure 6 shows by way of example the connection between the piston rod 32 and the coupling element. Coupling 20. Consequently, the extension 33 and the housing 28 have coincident perforations, through which a journal 29 made as a separate component part, in the form of a cylindrical bolt, was passed. The journal 29 is held in a forced connection either in the extension 33 or in the housing 28. In this way the rotary bearing is formed, the axis of rotation of which runs through the median longitudinal axis of the journal 29. Another variant of the invention does not represented in the drawings can be such that the piston rod 32 and the coupling element 20 have parts formed in the same element that mesh to form the rotary bearing.

For example, a journal 29 may have been formed on coupling member 20 (or piston rod 32) and piston rod 32 (or coupling member 20) may have been placed on that journal 29 by a perforation. The journal 29 can then be dispensed with as a separate component part.

As Figure 6 further details, the pin 29 projects from both sides of the coupling element 20, engaging the projecting sections in the guide collars 12.2. In this way, the coupling element 20 is guided safely between the two walls of the box 12.4 and in the guide collars 12.2.

As Figure 5 also details, a spring support 27 was arranged below the rotary bearing. This fixes the end of a tensioning spring 35 which with its other end is fixed to the box 12. With the arrangement spaced from the point of connection of the tensioning spring 35, a torque can be realized which acts by rotating clockwise (according to Figure 5) around the axis of rotation of the rotary bearing.

As Figures 1-3 show, the arrangement illustrated in Figures 4 and 5 is installed in box 12.

In that case, the damping cylinder 30 is placed in a slotted receiving space of the case 12. In the axial direction, the damping cylinder 30 is fixed by means of projections 12.5 protruding from the walls of the case 12.5, which are inserted into the peripheral groove 31 made in the damper cylinder 30.

Openings 12.1 were made in the walls of the box 12.4 which prevent the damper cylinder 30 from being pulled out.

Figure 1 shows the coupling element 20 in its starting position. In this case, the coupling element 20 on the rotary bearing is folded in such a way with respect to the piston rod 32, that the guide elements 22 formed in the same piece on both sides laterally on the supports 21 of the coupling element 20, they are retained in the two housings 12.3 of the guide collars 12.2. The tension spring 35 at this location is in its tensioned position and produces a pretension that acts on the coupling element 20 in such a way that it is retained in the folded position. As shown in Figure 1, the coupling element 20 in the illustrated position is ready to engage with a driver 40. The driver 40 there can be fixed, for example, in a frame of the sliding door in the body of the furniture, and the retraction device is fixed to the sliding part (drawer, sliding door, etc.) to be slid (or vice versa).

When the driver 40 reaches the first stop 25 in the direction of movement of the sliding piece in the closed position (see "F" in Figure 1), the guide elements 22 are displaced out of the housings 12.3. There, the coupling element 20 rotates around the axis of rotation of the rotary bearing. The driver 40 is then driven by the second stop 24.

The impact of the driver 40 on the first stop 25 is softened by the damping element (damping cylinder 30). And, therefore, the sliding piece is pulled by the force of the tensioning spring 35 to its closed position. When opening the closing piece, the coupling element 20 is pulled by the driver 25 that makes contact with the second stop 24, bringing it to the position shown in Figure 1. During the process, the tensioning spring 35 it is tensioned again and the piston rod 32 is withdrawn. The slider is then not engaged with the retraction device and can continue to move to the open position. It may then happen that due to, for example, a malfunction of the coupling element 20, it is in the position illustrated in Figure 2, but the driver 40 is outside the area formed between the stops 24, 25 and before the stop. second stop 24.

When the driver 40 moves in the direction of the second stop 24, it is placed on the spring element 32 which is located obliquely with respect to the direction of movement. This then drives the element perpendicular to the direction of movement "F", inserting it into the box 12. After having passed the second stop 24, the spring element 23 expands again and the driver 40 is in the correct position between the stops. 24, 25 (see Figure 2).

Figure 7 shows an arrangement that can be applied to heavy sliding parts (eg large sliding doors). In this case, two retraction devices are adjacent, according to Figures 1 to 6. Therefore, switched in parallel, they brake a driver 40 that simultaneously impacts on the two coupling elements 20, with the damping elements.

Another arrangement switched in parallel is illustrated in Figure 8. As this representation shows, the retraction devices were arranged facing each other, the walls of the box 12.4 being located in pairs in one plane respectively.

In that case, the stops 24, 25 are overlapped. As illustrated in Figure 6, the retraction devices have two fixing planes E parallel to each other, with which they can be brought into contact against and fixed to fixing surfaces. In the middle between the fixing planes E and parallel thereto, the median transverse plane M of the retraction device is located. As can be seen in Figure 6, the stops 24, 25 do not project above this median transverse plane M, so that the overlapping position of the stops 24, 25 illustrated in Figure 8 is possible.

Claims (11)

1. Retraction device, in particular for sliding elements, drawers or sliding doors with a box (12), which houses a damping element (30) and a coupling element (20), the coupling element (20) being adjustable in a guide link (12.2) of the box (12) between an inserted position and an extended position, a tensioning spring (35) having been connected to the coupling element (20) that performs the prestressing of the coupling element (20) in the extended position towards the inserted position, the coupling element (20) bearing on a support (21) a spring element (23) that can be deflected, and the coupling element (20) having a first and a second stop (24 and 25) which are arranged spaced between yes, characterized by that the second stop (24) is carried by a spring element (23), by which the spring element (23) can be deflected in an adjustment direction that extends essentially in the direction of rotation of the coupling element (20), and because the guide rail (12.2) has two slotted guides, which are inserted in two walls of the box parallel to each other (12.4) of the box (12). 2. Retraction device according to claim 1, characterized by what The coupling element (20) has a base part (21.1), in which a support (21) in the form of a cantilever is formed in the same piece. 3. Retraction device according to claim 1 or 2, characterized by what The spring element (23) is shaped like a laminated spring. Retraction device according to one of claims 1 to 3, characterized by what the spring element (23) carries the second stop (24) with a stop surface (24.2). 5. Retraction device according to claim 4, characterized by what the support (21) has a locking lug (24.2) that forms an extension. 6. Retraction device according to claim 4 or 5, characterized by what The second stop (24) makes contact against a guide surface (26) of the support (21). Retraction device according to one of claims 1 to 6, characterized by what undercut surfaces are provided on the second heel (24) and the support (21), which form a guide (24.3). 8. Retraction device according to one of claims 5 to 7, characterized by what When the spring element (23) is extended, the locking lug (24.2) is free above the support (21) in a stretched position. 9. Retraction device according to one of claims 1 to 8, characterized by what The coupling element (20) is guided with guide elements (22) in the guide collet (12.2) of a box (12). 10. Retraction device according to one of claims 1 to 9, characterized by what The coupling element (20) is guided in an adjustable manner in the guide link (12.2) by means of a journal (29), because the journal (29) can be adjusted from the inserted position of the coupling element (20) linearly in a section linear guide of the guide rail (12.2), and because the piston rod (32) is located in leakage with respect to the linear guide section. Retraction device according to one of claims 1 to 10, characterized by what The spring element (23) is joined in one piece with the coupling element (20).