DK2730734T3 - Two-way retraction device for a medium-sized sliding door. - Google Patents

Description

Bidirectional retraction device for a middle sliding door

The invention relates to a bidirectional retraction device for two-sided retraction of a sliding door into a middle door position in accordance with the preamble of claim 1, and to a sliding door arrangement having such a bidirectional retraction device. A bidirectional retraction device of this type is disclosed e.g. by DE 20 2010 007 230 U1. DE 10 2011 001 749 A1 discloses the features of the preamble of claim 1.

Unidirectional retraction devices for retracting a displaceable furniture part such as e.g. a drawer or a sliding door into its closed end position are generally known. Such known unidirectional retraction devices comprise a displaceably guided carrier for detachable coupling with the furniture part. In its closed end position, the furniture part is in engagement with the retracted carrier and, during its opening movement, carries along the carrier from a retracted end position against the action of a retraction spring into a tilted locked end position in which the furniture part is decoupled from the carrier in the opening direction. During its closing movement, the furniture part releases the carrier from the locked end position and is retracted by it, driven by the retraction spring, into the closed end position.

The bidirectional retraction device known from DE 20 2010 007 230 U1 serves for two-sided retraction of a middle sliding door into its middle door position. Each of the two unidirectional retraction devices has a separate guiding housing in which a carrier and a linear damper are arranged.

It is the underlying purpose of the present invention to further improve such a bidirectional retraction device for two-sided retraction of a sliding door into the middle door position.

This object is achieved in accordance with the invention by the features of claim 1.

In comparison with known separate guiding housings of unidirectional retraction devices, the invention enables construction of a smaller unit. The fixable linear damper moreover offers the possibility of selecting and installing the respectively optimum linear damper from a plurality of linear dampers each having different damping characteristics.

In accordance with the invention either one single linear damper or a plurality of parallel linear dampers can be optionally mounted to the same housing for each of the two unidirectional retraction devices in order to generate the corresponding damping characteristic depending on the weight class of the sliding door.

The carrier is formed in two parts, namely of a guiding element which is linearly guided in the guide of the housing, and a tilting element which is linearly and tiltably guided in the guide of the housing and is pivotably supported on the guiding element. This two-part design of the carrier has the advantage that the damping forces of the linear damper(s) have no influence on the tilting movement of the carrier. In an advantageous further development of this embodiment, the guiding element comprises a bearing pin and the tilting element comprises a bearing receptacle which is rotatably mounted on the bearing pin, or vice versa.

The invention also relates to a sliding door arrangement comprising a sliding door and a bidirectional retraction device as described above, wherein in its middle door position the sliding door is motionally coupled in both directions with the carriage.

Further advantages of the invention can be extracted from the description, the claims and the drawing. The features mentioned above and below can be used individually or collectively in any combination. The embodiment shown and described is not to be understood as an exhaustive enumeration but rather has exemplary character for describing the invention.

In the drawing:

Figs. 1a-1c show a known bidirectional retraction device in a middle door position (Fig. 1a) in which a sliding door is retracted to its middle door position, in an intermediate position (Fig. 1 b) in which the sliding door displaced in the opening direction away from the middle door position is still motionally coupled with the retraction device in the opening direction, and in an end position (Fig. 1c) in which the sliding door displaced in the opening direction away from the middle door position is no longer motionally coupled with the retraction device in the opening direction;

Fig. 2 shows the inventive bidirectional retraction device in a middle position analogous to Fig. 1a with removed upper housing half; and

Figs. 3a, 3b each show detailed views of a guiding element (Fig. 3a) illustrated in Fig. 2 and a tilting element (Fig. 3b) which is tiltably supported on the guiding element.

The known bidirectional retraction device 1 shown in Figs. 1a to 1c serves for two-sided retraction of a middle sliding door (middle door) 3 which is displaceably guided in the direction of the double arrow 2 into a closed middle door position. Towards this purpose, the retraction device 1 is e.g. mounted to an upper or lower guiding rail (not shown) of the sliding door 3 or on the upper floor or in the cabinet base of a sliding door cabinet.

The retraction device 1 comprises two unidirectional retraction devices 4 which act in opposite directions and are identically designed and installed in a mirror-inverted manner with respect to one another in a housing 5 in the illustrated embodiment, as well as a coupling carriage 6 which is displacebly guided in lateral guides (e.g. guiding grooves) 7 of the housing 5 in the direction of the double arrow 2. The coupling carriage 6 is arranged between the sliding door 3 and the retraction devices 4 and is used for coupling the sliding door 3 with the retraction devices 4 as described below in detail.

Each retraction device 4 has a guiding housing 8 with a guiding path 9 in which a carriage-shaped carrier 10 is displaceably guided between a retracted and an extended end position. Fig. 1c shows the carrier 10 of the right-hand retraction device 4 in its retracted end position and the carrier 10 of the left-hand retraction device 4 in its extended end position. The carrier 10 comprises on its side facing the coupling carriage 6 a recess 11 (Fig. 1c) and is loaded by a retraction spring 12 into its retracted end position. The retracting movement of the carrier 10 is damped by a fluid damper designed as linear damper 13, the linearly displaceable piston of which is carried along in the extension direction by the carrier 10. In this connection, a piston rod of the piston may e.g. be mounted to the carrier 10. Starting from the retracted end position, the guiding path 9 initially has a straight guiding section 9a, which then merges at the end of the guiding path 9 into a transversely extending guiding section 9b which defines the extended end position of the carrier 10.

The coupling carriage 6 has a middle carriage arm 14 and two outer carriage arms 15 which are each hinged to the middle carriage arm 14 via axes 16, i.e. are connected in a tiltable manner. The middle carriage arm 14 is guided in the lateral guides 7 of the housing 5 via these axes 16 which laterally project past the coupling carriage 6. The free ends of the outer carriage arms 15 are also guided in the lateral guides 7 via guiding pins 17. The outer carriage arms 15 each comprise on their sides facing the carrier 10 a projection 18 and on their sides facing the sliding door 3 a projecting coupling element 19 which may be formed as shown e.g. by an arm that protrudes at an angle.

Two straight outer guiding sections 22 join a straight middle guiding section 20 of the guide 7 in each case via an inclined guiding section 21 (Fig. 1c), which are recessed by an amount A with respect to the middle guiding section 20 in a direction away from the sliding door 3 due to the inclined guiding sections 21 and may extend e.g. in parallel with the central guiding section 20 as shown. The middle guiding section 20 is more than twice as long as the separation between the two axes 16 and the outer guiding sections 22 are at least as long as the separation between the axis 16 and the guiding pin 17.

The sliding door 3 has two carrier projections 23 on its side facing the coupling carriage 6, the outer separation of which corresponds to the separation between the two coupling elements 19. The carrier projections 23 may e.g. be formed by a bolt or an angled metal sheet.

Fig. 1a shows the retraction device 1 in its basic position in which the sliding door 3 is retracted into its closed middle door position. In this basic position, the two carriers 10 of the retraction devices 4 are in their retracted end positions and the two projections 18 of the coupling carriage 6 engage the recesses 11 of the two carriers 10. The carrier projections 23 of the sliding door 3 are fixed between the two coupling elements 19, whereby the coupling carriage 6 is motionally coupled with the sliding door 3 in both directions. The two axes 16 are in the middle guiding section 20 and the guiding pins 17 are each in the outer guiding sections 22, wherein the projections 18 of the outer carriage arms 15 engage the recesses 11 of the carriers 10.

When the sliding door 3 is pushed to the left (opening direction 24) from its closed middle door position shown in Fig. 1a into the intermediate position shown in Fig. 1 b, the coupling carriage 6 is carried along to the left via its left coupling element 19 which abuts the left carrier projection 23 of the sliding door 3. The guiding pin 17 of the right carriage arm 15 is thereby transferred via the inclined guiding section 21 into the middle guiding section 20, whereby the right carriage arm 15 tilts in an anti-clock-wise direction about the axis 16 and its projection 18 no longer engages the recess 11 of the right carrier 10. The carrier 10 of the left retraction device 4 is moreover carried along via the projection 18 of the left carriage arm 15, which engages its recess 11, by the coupling carrier 6 to the left against the action of the retraction spring 12 which is thereby tensioned.

When the sliding door 3 and therefore the coupling carriage 6 are pushed further to the left, the carrier 10 of the left retraction device 4 is pushed further to the left against the action of the retraction spring 12 until it finally tilts at the end of the straight guiding section 9a via the transverse guiding section 9b into a locked end position. In this locked end position, the recess 11 of the carrier 10 is open towards the opening direction 24 such that the left carrier arm 15 is decoupled from the carrier 10 in the opening direction 24.

The left end position of the coupling carriage 6 shown in Fig. 1c is reached as soon as its left axis 16 is transferred via the inclined guiding section 21 into the left guiding section 22. The left coupling element 19 is thereby transversely displaced by the amount A in the direction away from the sliding door 3 and no longer abuts the left carrier projection 23 such that the coupling carriage 6 is no longer carried along to the left by the sliding door 3. The sliding door 3 decoupled from the coupling carriage 6 can then be further pushed open to the left.

If, starting from Fig. 1 c, the sliding door 3 is pushed back in the closing direction 25 into its middle door position, the sliding door 3 initially contacts with its right carrier projection 23 the right coupling element 19 of the coupling carriage 6 which is thereby carried along in the closing direction 25. The left axis 16 is again transferred via the inclined guiding section 21 into the middle guiding section 20, whereby the left coupling element 19 is transversely shifted by the amount A in the direction towards the sliding door 3 and engages behind the left carrier projection 23 in the closing direction 25. The coupling carriage 6 then enters with its left projection 18 into the laterally open recess 11 of the locked left carrier 10 and starts to rotate the carrier 10 out of its locked end position, thereby simultaneously fixing the projection 18 in the recess 11. As soon as the carrier 10 has reached the straight guiding section 9a, the tensioned retraction spring 12 retracts the carrier 10 - damped by the linear damper 13 - in the closing direction 25, thereby also retracting the sliding door 3 into its middle door position via the coupling carriage 6. At the end of the retraction movement, the right guiding pin 17 is again transferred via the inclined guiding section 21 into the right guiding section 22, whereby the right carriage arm 15 is tilted in a clockwise direction about the axis 16 and its projection 18 engages the recess 11 of the right carrier 10. This basic position of the retraction device 1 with the sliding door 3 being retracted into its middle door position is illustrated in Fig. 1a.

Fig. 2 shows the inventive bidirectional retraction device 101 which is functionally identical to the bidirectional retraction device 1 of Fig. 1. For this reason, in Fig. 2 the same reference numerals as in Fig. 1 are used for parts of identical function.

In contrast to the bidirectional retraction device 1, in which the carrier 10 and the linear damper 13 of each unidirectional retraction device 4 are arranged in a separate guiding housing 8, the bidirectional retraction device 101 does not have any separate guiding housings but the carrier 10 and the linear damper 13 of each unidirectional retraction device 4 are mounted to the housing 5 independently of each other. The housing 5 has two housing halves of which the upper one has been removed in Fig. 2 and for this reason, only the lower one is visible. The two housing halves comprise in addition to the guides 7 for the coupling carriage 6 also the guides 9 for the carriers 10 and also trough-shaped receptacles (not shown) into which the linear damper 13 is inserted and thereby fastened in the housing 5. The coupling carriages 6 are each guided in a displaceable and tiltable manner in the two-sided guides 7, 9 of the housing halves by means of their two guiding pins 16,17, which project on both sides, and the carriers 10 are each guided in a displaceable and tiltable manner in the two-sided guides 7, 9 of the housing halves by means of their two guiding pins 101,102, which project on both sides. The two carriers 10 are connected to one another by the retraction spring 12 and are thereby each loaded in their retracted end position.

In dependence on the weight class of the sliding door 3, either one or more, e.g. as in the present case, two parallel linear dampers 13 can be mounted to the same housing 5 for each of the two unidirectional retraction devices 4.

As is shown in Figs. 3a, 3b, the carrier 10 is formed in two parts of a guiding element 103 and a tilting element 104 which is pivotably guided thereon. The guiding element 103 has the elongated guiding pin 101 which protrudes on both sides and by means of which it is linearly and displaceably guided in the straight guiding section 9a of the guiding path 9. The tilting element 104 comprises the round guiding pin 102 which protrudes on both sides and by means of which it is linearly and displaceably guided in the straight guiding section 9a of the guiding path 9 and is then tiltably guided in the transversely extending guiding section 9b to the locked end position. The guiding element 103 moreover comprises a bearing pin 105 and the tilting element 104 comprises a bearing receptacle 106 which is rotatably mounted on the bearing pin 105.

As is further shown in Figs. 3a, 3b, the linear dampers 13 are formed as piston dampers with a piston rod 107 which are each inserted into a blind bore 108 of the guiding element 103 and therefore both engage the guiding element 103. The two-part design of the carrier 10 is advantageous in that the damping forces of the linear damper(s) 13 that act on the guiding element 103 have no influence on the tilting movement of the tilting element 104.

Claims (7)

A two-way retraction device (101) for retracting a sliding door (3) from both sides to a door center position, comprising: a housing (5), two opposing one-way retraction devices (4), each with one sliding carrier (10), guided in a guide (9) and which can be moved from a retracted end position to a locked end position against the action of a retract spring (12), and with at least one linear damper (13) to dampen the retracting movement of the driver (10), and a clutch slide ( 6) which is inserted in a guide (7) of the housing (5) so that it can be moved in a longitudinal direction and can be tilted, and which comprises two spacers (19) spaced apart and in engagement with the two retracted carriers (10) when in a carriage center position, where, when the coupling carriage (6) is moved in one or the other direction from the carriage carriage position, it carries one carriage (10) in the direction of movement (24), and is simultaneously decoupled from the other bring is (10) by a tilting motion, and finally, when the coupling carriage (6) reaches a carriage end position, it is decoupled from the entrained locked carrier (10) in the direction of movement (24) and the front coupling element (19) in the direction of movement. is displaced rearwardly relative to the rear coupling member (19), and when the coupling carriage (6), when moved from the carriage end position back into the carriage center position, releases the carrier (10) from the locked carriage position, and is withdrawn from the carriage center position where the housing ( 5) also includes the guides (9) for the drivers (10), wherein the carrier (10) is formed of two parts, a guide element (103) which is linearly inserted in the guide (9) of the housing (5), and a rocker element (104) ) is guided linearly so that it can be tilted in the guide (9) of the housing (5) which is pivotally mounted on the guide member (103), characterized in that the guide member (103) comprises several blind bores (108) and the housing (5), for each of the two one-way retracting devices (4), optionally, one simple linear damper (13) or several parallel linear dampers (13) are fixed, each inserted into the blind bores (108) of the guide member (103) with a piston rod (107), and thereby being secured to the housing (5) independently of the carriers (10). Two-way retraction device according to claim 1, characterized in that the guide element (103) comprises a bearing pin (105) and the rocker element (104) comprises a bearing bush (106) rotatably mounted on the bearing pin (105), or vice versa. Two-way retraction device according to any one of the preceding claims, characterized in that the two carriers (10) are connected to each other by means of a common retraction spring (12). Two-way retraction device according to any one of the preceding claims, characterized in that the housing (5) comprises two housing halves, between which the coupling carriage (6) and the carriers (10) are provided and the linear dampers (13) are arranged. . A two-way retraction device according to claim 4, characterized in that each of the two housing parts comprises guides (7, 9) for the coupling carriage (6) and the carriers (10). Sliding door assembly with a sliding door (3) and with a two-way retracting device (101) according to any one of the preceding claims for retracting the sliding door (3) from both sides, for a door center position, wherein the sliding door (3) in its door center position is motion-coupled to the coupling carriage (6) in both directions. A sliding door arrangement according to claim 6, wherein the retraction device (101) is fixedly positioned and the sliding door (3) in its door center position is fixed on both sides between the two coupling elements (19), or vice versa.