ES2386536T3 - Opening and closing device for a pushing element - Google Patents

Abstract

The opening and closing device has a drawing guide which has a guide rail that is mounted on a furniture body (2). A runner rail is moved on the guide rail or a central rail between an opening position and a closing position. An activator is provided at the runner rail, where an ejector is provided for moving the runner rail with a pushing element (3) during releasing from the closing position to the opening position against the force of a self-closing device. The activator is coupled in the area of the closing position with the self-closing device.

Description

Opening and closing device for a pushing element

The present invention relates to an opening and closing device for a pushing element, in particular a furniture drawer, according to the preamble of claim 1.

EP 1 845 821 discloses a closing and opening device for furniture drawer removal guides having an ejection device. When the furniture drawer is closed, a spring of the ejection device is tensioned and fixed by means of a locking mechanism. For the unlocking of the locking mechanism, the furniture drawer is pressed against the force of the spring, so that the furniture drawer is then pushed to a slightly open position and then continued to be opened manually. In this closing and opening device the drawback is that the blocking of the ejection device occurs just immediately in the closed position. In this way it can happen that in a movement of the furniture drawer until very close to the closing movement it is accidentally opened again. Moreover, it may happen that due to the tolerances in the assembly of the closing and opening device incorrect drives can occur when tensioning and unlocking the ejection device.

In addition, document AT 008 629 discloses a drive device for a furniture drawer that is configured as a Touch-Latch mechanism and enables expulsion of the furniture drawer from the closed position. In order to bring the furniture drawer to the closed position, in addition, a retraction device is provided. The drive device and the retraction device are arranged in a projecting housing of a rail of the extraction guide.

Therefore, it is the objective of the present invention to create an opening and closing device for a pushing element that allows a simple drive and ensures that it also occurs in a movement not completely taken to the closed position.

Said objective is achieved by means of an opening and closing device with the characteristics of claim 1.

According to the invention, the opening and closing device comprises an ejection device for, in an unlocking, moving the raceway with the pushing element of the closing position in the direction of opening, against the force of the device self-retraction In this way, the advantages of the ejection device can be combined with the advantages of the self-retraction device. In fact, the self-retraction device ensures that when the thrust element is closed, it is safely guided to the closed position and retained. Also in the case of a closing movement executed inaccurately, the self-retraction device guarantees that in its sector of effectiveness the thrust element is moved to the closed position. Likewise, the user can make use of the advantages of the ejection device which in the case of an unlocking guarantees an opening movement. In this way, the pushing element can have a design without a handle and the release of the ejection device can be activated by oppression (ejection mechanism).

According to a preferred configuration of the invention, the ejection device has an energy accumulator whose force is greater than the force of an energy accumulator of the self-retraction device. This ensures that when the pushing element is opened, the ejection device also exceeds the force of the energy accumulator of the self-retraction device and that an opening movement is guaranteed.

Preferably, the energy accumulator of the ejection device is rechargeable by a movement of the raceway. This eliminates the need to provide other components or drives for recharging the energy accumulator. Indeed, the raceway is moved by the user anyway, in particular in a closing movement, so that the recharge of the energy accumulator can be done mechanically easily. In this case, the energy accumulator of the ejection device can be locked in a recharged position. The recharge of the energy accumulator is preferably produced by a movement of the raceway which, in this case, is still outside the drive sector of the self-retraction device. This ensures that the effect of the energy accumulator of the ejection device and the energy accumulator of the self-retraction device is not overlapped. In addition, the forces of the energy accumulators can be broadly selected independently of each other. Preferably, the force of the energy accumulator of the ejection device exceeds the force of the energy accumulator of the self-retraction device.

According to another configuration of the invention, the ejection device has a locking mechanism by means of which a locking ratchet can be fixed in two positions distanced from one another. In this case, the ejection device can be configured in such a way that in the closed position the locking mechanism ensures a blocking or interlocking and there is an unlocking of the pushing element by means of an oppression on pushing element.

In another configuration of the invention, the ejection device is effective in the direction of opening at least in the sector of the self-retracting device and for the recharge of the energy accumulator of the expulsion device a movement of the raceway outside the sector is used of effectiveness of the self-retraction device. Said accumulation sector for the energy accumulator of the ejection device can be generated both immediately following the sector of effectiveness of the self-retraction device and distanced from it. In addition, the self-retraction device may have a shock absorber to avoid loud shock noises.

By using an adjustable ejection device, the gap between the front panel and the cabinet body can be adjusted. For safe operation of the ejection device, the interstitium of the front panel should be located in a range between 3 and 7 mm, preferably approximately 5 mm. By means of the energy accumulator of the self-retracting device and the locking ratchet assigned thereto and the assigned activator, a closing maintenance in the desired position is activated by means of the running rail coupled with the furniture drawer. Additionally, by means of the locking ratchet assigned to the ejection device and the activator assigned thereto, an antagonistic force in the direction of opening for the positioning of the front panel with an interstitial measurement is generated by means of the running rail coupled to the furniture drawer appropriate for the operational safety of the ejection device.

The locking ratchet of the ejection device has a stop only in the direction of opening. So that the activator of the self-retraction device can overcome the locking ratchet of the ejection device, it has an approach chamfer on the rear side in the direction of opening. After recharging the energy accumulator of the ejection device by means of the activator assigned to the self-retraction device, the self-retracting device locking ratchet pivots and releases the activator so that it can be inserted into the ejection device locking ratchet and the Same be activated. Alternatively, the locking ratchet of the ejection device can be made of elastic material, so that it can disappear when it is exceeded by the activator assigned to the self-retraction device.

Preferably, the active length of the ejection device is a multiple of the active length of the self-retraction device.

In one configuration, the ejection device comprises a locking fitting with a control element that is movable along a control curve and lockable in a locking slot. In this case, the locking groove is movable and pivotally mounted at least in part, so that the control element can be released from the locked position before a predetermined tensile force. In this way, the user has the possibility of optionally unlocking the locking hardware by inserting the extraction guide or the furniture drawer or by extracting. It is also possible to unlock the locking hardware by means of a switch or a control. A displacement means a transfer, a pivot, a rotation on a spatial axis.

The locking groove can comprise at least two moving parts relative to each other. The moving part of the locking groove is prestressed by means of a spring in an initial position that also determines the force for an unlocking process. In this way it is ensured that after an unlocking movement the lock groove is replaced again to the initial position, so that the control element can be locked again in the lock groove.

The locking hardware may also include a trigger by means of which the control element can be moved out of the locking slot. In this case, the trigger can move the control element to the section of the loop-shaped control curve by a relative movement between the component that forms the locking groove and the trigger. In this case, the trigger and / or the locking groove can optionally be configured in a mobile manner, to achieve unlocking.

In addition, the control curve, charged by the energy accumulator, can be moved relative to the trigger. By means of a determined force adjustable by means of the force of the energy accumulator, the control curve can be displaced by means of the terminal section in the direction of extraction. The trigger is fixed by a groove in the housing and, therefore, the control curve can be displaced from the trigger. In an overload situation, a force is exerted on the control curve in the sector of the blocking groove by means of the control element and its terminal section. By means of the larger contact surface of the terminal section in the control curve, the control curve is displaced with respect to the trigger. The trigger causes the terminal section to be pressed against the forward chamfer by means of its inclined surface. The control curve continues to be moved in the direction of extraction and the terminal section reaches the loop-shaped sector. Therefore, the ejection device helps to open the pushing element. After tensile firing, the component with the control curve is returned to the final position against the direction of extraction by means of an energy accumulator. When closing, the terminal section can be locked again in the locking groove.

Next, the invention is explained in detail with reference to the accompanying drawings by means of an exemplary embodiment. They show:

Figure 1, a process diagram with a schematic representation of a piece of furniture with an opening and closing device according to the invention;

Figures 2A-2N, a plurality of views of an opening and closing device, in different positions;

Figure 3, a perspective view of an extraction guide mounted on roller bearings, with an opening and closing device according to the invention;

Figure 4, a side view of a part of the extraction guide, with an opening and closing device according to Figure 3;

Figure 5, a sectional representation of the extraction guide according to the section plane V-V of Figure 4 (without rolling element);

Figure 6, a sectional representation of the extraction guide according to section plane VI-VI of Figure 4 (without rolling element);

Figures 7A-16D, multiple views of the opening and closing device of Figure 3, in different positions;

Figures 17 and 18 show views of the opening process shortly before the exit of the retention ratchets by means of activators;

Figures 19 to 24 show views in the process of loading the ejection device and the exit of the locking ratchet by means of an activator;

Figures 25 to 26E show views of the opening process by exceeding the locking ratchet of the ejection device by means of the activator of the self-retracting device;

Figure 27, an exploded view of a locking hardware of the ejection device;

Figures 28A and 28B, views of the control curve and the control element of the locking hardware, in different positions;

Figures 29A and 29B, two detailed views of a control curve of a locking hardware according to a first embodiment;

Figures 30A and 30B, two views of a control curve according to a second embodiment;

Figures 31A and 31 B, two views of a control curve according to a third embodiment;

Figures 32A to 32C, views of a control curve according to a fourth embodiment;

Figures 33A to 33D, multiple views of another control curve in the unlocking of the control element;

Figures 34A and 34B, a perspective view and an exploded view of another exemplary embodiment of a locking hardware;

Figures 35A to 35H, multiple views of another control curve in the unlocking of the control element.

A piece of furniture 1 comprises a piece of furniture 2 in which a plurality of pushing elements in the form of furniture drawers 3 are positioned displaceably. To this end, there are corresponding extraction guides 5 on opposite sides of the furniture drawer 3, an opening and closing device having been provided in at least one extraction guide. The furniture drawer 3 is coupled with the rolling rails 10.

With the help of figure 1, the operation of the opening and closing device can be explained schematically, explaining the position of the furniture drawers 3 from top to bottom. The upper furniture drawer 3 is in the closed position. A front panel 4 of the furniture drawer 3 is arranged at a distance L 1 from the furniture body 2 which, for example, is in a range between 3 and 7 mm, preferably about 5 mm.

To open the furniture drawer 3, it is pressed on the front panel 4 in the direction of the furniture body 2, as shown from above in the second furniture drawer 3.

By pressing the furniture drawer 3 against the furniture body 2, an ejection device 6 having a spring 15 is unlocked by means of which the furniture drawer 3 is moved to a slightly open position (central drawer). In the slightly open position, the distance L2 of the front panel 4 of the furniture body 2 is approximately 40 mm and can be arranged, in particular, in the range between 30 and 80 mm. In said position, the user can grab the front panel 4 and continue to open the furniture drawer, as shown in the furniture drawer 3 located below.

When the furniture drawer 3 is again closed by the user, the spring 15 of the ejection device 6 is tensioned again by the closing movement. At a predetermined distance in front of the closing position, for example in a range between 20 and 70 mm in front of the closing position, the spring 15 of the ejection device has already been fully tensioned. Consequently, in said terminal sector a self-retracting device is activated which is coupled with the furniture drawer 3. In this way, the furniture drawer 3 can be moved to the closing position L 1. To avoid the closing of the drawer at once. of furniture 3, the self-retraction device may be provided with a damper that, if necessary, slows the movement of the furniture drawer 3 in the closing direction.

In Figure 2, the mechanics of the ejection device and the self-retraction device are shown schematically. The arrows in figure 2 show in each case the direction of movement of the guide rail 10 coupled to the furniture drawer 3. The sequence of the movement is as follows:

Figures 2A to 2H show views of the closing process.

In figure 2A a position is shown during the closing process of the furniture drawer 3, in which the locking ratchet 13 of the ejection device 6 with the activator 12 of the self-retracting device 8 is connected via the rail race 10 with the furniture drawer 3. Figure 2A shows the process of loading the compression spring 15 of the ejection device 6. The race track 10 has two activators 11 and 12 spaced apart from each other, the activator 12 being coupled in the manner of a drive with a locking ratchet 13 of the ejection device 6. The locking ratchet 13 is driven in a guideway 14 and prestressed in the direction of opening by a compression spring 15. It is also provided a self-retracting device which also includes a locking ratchet 16 attachable with the activator 12 of the race track 10. The locking ratchet 16 can be fixed in two poles. positions distanced from each other along a guide 17.

According to Fig. 28, in a closing movement the raceway 10 is pressed against the force of the compression spring 15. When the locking ratchet 13 reaches a terminal sector of the guide 14 there is a locking guide there according to the principle of a cardioid curve or an expulsion mechanism. The locking ratchet 13 is correspondingly pivoted and moved against a stop 19 of the guide 14. In this case there is a pivoting of the locking ratchet 13 which, consequently, presses it back out of the stop position (figure 2D) by means of the force of the compression spring 15, by locking the locking ratchet 13 into a locking housing 20 (Figure 2E). In said position, the activator 12 is disengaged from the locking ratchet 13, so that then the raceway 10 can be moved by the user in the direction of closure.

In this movement of the raceway 10 made in the closing direction, the activator 12 arrives in the closing direction to be embedded with the locking ratchet 16 of the self-retracting device. The locking ratchet 16 is pivoted from its terminal position and moved along the guide 17 (Figure 2G).

The raceway 10 is now carried by the user and / or by means of the force of a tension spring 22 of the self-retracting device 8 to the closed position shown in Figure 2H. In the closed position, the second activator 11 reaches the engagement with the locking ratchet 13 of the ejection device 6. In the closed position, the activator 12 also continues to be coupled with the retention ratchet 16 of the self-retracting device.

Figures 21 through 2N show views of the opening process.

To open the furniture drawer, it is pressed by the user in the furniture body beyond the closed position and, correspondingly, the locking ratchet 13 is pressed against the force of the compression spring 15 no longer shown in figures 21 to 2N. By oppression, the locking ratchet 13 is unlocked (Figure 2J) and can thus be freely moved along the guideway 14 by the force of the compression spring 15. In this way the activators are moved 11 and 12 firmly coupled with the raceway 10, so that the activator 12 moves the locking ratchet 16 of the self-retracting device from the terminal position back to a curved end section 21 of the guide 17 (Figure 2K).

In Fig. 2L, the locking ratchet 16 has arrived in a terminal position to the curved terminal sector 21 and is pivoted. In this way, the activator 12 is released in the opening direction and can continue to be moved in the opening direction (Figure 2M). The ejection device is active until the locking ratchet 13 has reached the end of the guide 14. In said position, the activator 11 is released from the locking ratchet 13, such that the raceway 10 is now disengaged from the locking ratchet 13 and locking ratchet 16 and can move freely. Now, for tensioning the ejection device, the raceway 10 must be moved until the fastener 12 can re-engage with the locking ratchet 13. However, because the elastic deflection of the ejection device is only found between 30 mm and 100 mm, a coupling of the activator 12 with the locking ratchet 13 is possible without problems.

In figures 3 to 6, an opening and closing device is shown with a guide rail 9 that can be mounted to the furniture body and a raceway 10 that can be displaced by means of rolling elements. Activated tracks 11 and 12 are fixed on the race track 10, spaced apart from each other. In the direction of removal, the activator 11 is arranged in front and, according to figure 5, protruding lower than the rear activator 12. In this way, the activator 12 can be moved in the opening direction above the locking ratchet 13. In this case, the locking ratchet 14 is movably mounted in a guide housing 23. Similarly, the locking ratchet 16 is movably mounted in a guide housing 24.

In Figures 7 to 15, the opening and closing device of Figure 3 is shown in different positions in a plan view and side view.

In Figures 7A and B, the opening and closing device is shown in an opening position in which the two activators 11 and 12 are not embedded with the retention pads 13 and 16. The raceway 10 can be moved. freely along the glutton lane 9.

In a movement in the closing direction, the position shown in Figures 8A and B is reached. The trigger 12 engages with the locking ratchet 13. The locking ratchet 13 is guided along the guide housing 8 in such a way. which only allows the activator 12 to pass freely in the opening direction, while an insertion in the closing direction is possible.

In a movement in the closing direction (figures 9A, 9B) the spring of the ejection device is tensioned by moving the locking ratchet 13 along the guide housing 8. In another movement to the position shown in figures 10A Y 10B, the spring of the ejection device is tensioned and the locking ratchet 13 is interlocked respectively by the locking mechanism. In this case, the activator 12 is released from the locking ratchet 13 and delivered to the locking ratchet 16. This can be achieved because the locking ratchet 13 pivots out and, therefore, the activator 12 can be moved on top of the ratchet lock 13.

In another movement of the raceway 10 in the closing direction, the self-retraction device is now activated in the guide housing 7 by means of the activator 12 which is engaged with the locking ratchet 16. The self-retraction device acts in the direction closing by means of a spring, so that the user can now release the furniture drawer, because it now acts automatically by means of the self-retracting device. To prevent the closing of the cabinet drawer, the self-retraction device can be equipped with a damper.

Figures 12A and 12B show the closing position of the opening and closing device. In this position is the activator 11 engaged with the locking ratchet 13, while the activator 12 is engaged with the locking ratchet 16. The raceway 10 has been moved so much to the position reached that a front panel of a drawer of furniture is arranged in a closed position. However, the raceway 10 can be moved a minimum further into the furniture body, to activate the ejection device. The locking ratchet 13 of the ejection device is released by means of the activator 11 by moving the track 10 inwardly to the furniture body.

In figures 13A and 13B a position of the opening and closing device is shown, in which the ejection device is active and presses the activator 11 to the open position by means of the locking ratchet 13. The activator 12 is engaged. with the locking ratchet 16 which, however, is pressed to the closed position by a smaller spring force of the self-retracting device. In this way, the track 10 moves against the spring of the self-retracting device in the opening direction.

In figures 14A and 148 a position is shown in which the self-retraction device has been tensioned by means of the activator 12 and is now locked in a terminal position. The trigger 12 is released by locking the locking ratchet 16 and can now move in the direction of opening.

In figures 15A and 158 an opening position is again shown in which the activators 11 and 12 are not engaged with the retention pads 13 and 16 and the raceway can be freely moved along the guide rail 9.

Figures 16A to 16C show the closing movement of the track 10 in a bottom view of the opening and closing device. Figure 16D shows an opening movement shortly before leaving the retention pads 13 and 16 by means of the activators 11 and 12.

Figures 17 and 18 show the opening process shortly before leaving retention pads 13 and 16 by means of activators 11 and 12.

Figures 19 to 24 show the end of the loading process of the ejection device 6 when leaving the locking ratchet by means of an activator 12. In this case, by exceeding by means of the activator 12, which has previously carried out the loading process for The compression spring 15, the locking ratchet 13 pivots out of the travel path of the activator 12. The locking ratchet 13 of the ejection device 6 has a stop 26 only in the direction of opening. After reloading the compression spring 15 of the ejection device 6 by means of the activator 12 assigned to the self-retraction device 8, the locking ratchet 13 of the ejection device 6 pivots and releases the activator 12 so that it can be inserted into the locking ratchet 16 of the self-retraction device 8 and it is fired.

Figures 25 to 26E show the opening process when the activator 12 exceeds the locking ratchet 13 of the ejection device 6. The locking ratchet 13 of the ejection device 6 has a stop 26 only in the direction of opening. So that the activator 12 of the self-retracting device 8 can pass the locking ratchet 13 of the ejection device 6, it has an approach chamfer 27 from the rear in the opening direction. After reloading the compression spring 15 of the device of ejection 6 by means of the activator 12 assigned to the self-retraction device 8, pivots the locking ratchet 13 of the ejection device 6 and releases the activator 12 so that it can move freely together with the raceway 10 coupled to the furniture drawer 3 or It can be opened by the user.

A locking hardware 30 is shown in Figure 27, as it can be mounted as an ejection device 6 in an extraction guide 5. The locking hardware 30 comprises, movably mounted, a locking ratchet 13 'which is attachable with the activator 11 on the raceway 10. The locking ratchet 13 'is movable along a curved guide 35 of a housing 34. In this case, the housing 34 can be fixed to the raceway 9. To the housing 34 a housing 36 of a spring element has been fixed. The housing 34 comprises a sleeve 65 integrally configured, to which the housing 36 is locked.

The locking ratchet 13 'is coupled to a rod 60 housed in a housing in the manner of a spherical cap by means of a terminal section 61 in the form of a thickened spherical head. The housing of the terminal section 61 may be in material, shape or positive connection. The rod 60 is attached on the opposite side to the terminal section 61 with a disk 62 at the end of which contacts a spring 63. The opposite end to the spring 63 is supported on a cover 64 of the housing 36.

The locking ratchet 13 'also has an arm 38 to which a coupling element is attached.

39. The coupling element 39 is connected to a control element 40 formed as a metallic wire having a curved end section 41. The curved terminal section 41 of the control element 40 grips in a control curve 50 integrally configured with a component 48. The component 48 is fixed to the housing 4 by means of a fixing element 43. For this, the housing 34 it has a counter part 44 locked by means of the fixing element 43. In the housing 34 there is also a bottom 42 set apart from the component 48. In this way it is possible that the thread of the control element 40 is moved between the bottom 42 and component 48, engaging the curved terminal section 41 in the control curve 50. In addition, the bottom 42 prevents the deviation of the curved terminal section 41 from the control curve 50.

The function of the control curve 50 and the control element 40 is explained in greater detail with reference to Figure 28.

In an initial position, a furniture drawer coupled to a raceway 10 is in a closed position and, thus, the control element 40 is retained in the control curve 50 in such a way that it is locked. To do this, the curved terminal section 41 is located in a blocking groove 56 of the control curve 50 and is pressed into the blocking groove 56 by the force of the spring 63 by means of the rod 60, the locking ratchet 13 ' and the other coupling elements. The control curve 50 in the housing 48 is configured in the form of a groove and comprises a section 53 in the form of a loop.

When you want to open the furniture drawer from this closed position (figure 28A), there is an oppression of the furniture drawer in the direction of closing towards the furniture body, so that the curved end section 41 is moved against a chamfer approach 58 in the control curve 50, which causes the control element 40 to be pivoted and fit into a housing 57 disposed offset from the lock groove 56. When the furniture drawer is released, the control element 40 it can now be returned to the output sector 59 of the control curve 50 due to the force of the energy accumulator in the form of the compression spring 63.

In a closing movement of the furniture drawer, the control element 40 is moved along the control curve 50 in the loop-shaped section 53 towards a deflection 54 which is arranged adjacent to a groove-shaped housing 55 . In the sector of the turnout 54, the control element 40 is first moved to the groove-shaped housing 55, until a front panel of the furniture drawer hits the furniture body and the user releases the furniture drawer. Next, the furniture drawer is moved back to the lock groove 56 due to the force of the compression spring 63, so that the mostmda position in Figure 28A is reached.

Figure 29A shows in detail the sector of the control curve 50 adjacent to the groove-shaped housings 55 and 57. The curved terminal sector 41 of the control element 40 is located in the locking groove 56 formed by a projection 71 protruding from a disk 70. The disk 70 is rotatably mounted with respect to an adjacent projection 80 of the body 48.

As shown in Fig. 29B, the control element 40 can be unlocked by rotating the disk 70 counterclockwise by rotating the lock groove 56 together with the disk 70, so that due to the force of the spring Compression 63 the terminal section 41 slides along the projection 71 and reaches the loop-shaped section 53 of the control curve 50. In this case, the disk 70 can be prestressed to the initial position by means of an accumulator of energy in the form of, for example, a spring, as shown in Figure 29A. In

In this case, the disk 70 can contact a body stop 48.

A modified configuration of a control curve 50 with a lock groove is shown in Figure 30A

56. On a disk 70 'a projection 71' is formed which is rotatable together with the disk 70 '. The blocking groove 56 is formed by the movable boss 71 'and a stationary projection 81' integrally configured with the body 18. In addition, other projections 80 'are formed stationary for the configuration of the control curve 50.

To unlock the control element 40, the disk 70 'can be rotated together with the projection 71', as shown in Figure 30B. In this way a gap is formed between the boss 71 'and the boss 81' through which the curved terminal section 41 of the control element 40 is moved by means of the force of the compression spring

63. Consequently, the terminal section 41 again reaches the loop-shaped section 53 of the control curve. 50.

In Fig. 31A another control of the control curve 50 is shown in which the lock groove 56 is configured in multiple pieces. Similar to the exemplary embodiment of Fig. 30A, a rotating disk 70 is mounted on component 18. The locking groove 56 is composed of a stationary projection 81 'integrally formed with the projection 80 of component 18. In the disc 70 'a bolt-shaped projection 75 is provided that forms a stop for the curved terminal section 41 of the control element

40. By rotating the disk 70 ', the bolt-shaped projection 75 is separated from the projection 81', so that the terminal section 41 can become between the projection 75 and the projection 81 'in the shaped section 53 loop of control curve 50.

In the exemplary embodiment shown in FIG. 32A, a stationary projection 80 "is formed in the control curve 50 which, together with a movable projection 70", forms a blocking groove. The terminal section 41 is held in the initial position in the lock groove 56.

As shown in Figure 32B, by moving the projection 70 "downwards, a channel 72" can be released through which the terminal section 41 can reach the loop-shaped section 53 of the control curve 50. In this case, the projection 70 "is movable mounted on the component 48.

The displaceable projection 70 "can, on the one hand, be configured as an overload safe to pull the control element 40 in a traction on the furniture drawer and, on the other hand, by means of the projection 70", a trip of the control element 40. To this end, the projection 70 "according to FIG. 32C can be moved in the direction shown to push the curved terminal section 41 of the control element 40 out of the lock groove 56. The unlocking of the connecting element 40 can be performed by displacing component 18, the projection 70 "being stationary and being fixed, for example, to the housing 34.

In the lock fitting 30, the lock slot is composed of a moving part that releases the connecting element 40 at a predetermined force. In this case, the moving parts 70, 70 ', 70 "can be prestressed to an initial position by means of an energy accumulator, for example, in the form of a spring. In this case, the direction of movement of the moving parts can be chosen in any way; in particular for the control element insurance the projections can be moved perpendicular to the direction of movement of the control element 40.

In Figures 33A to 330, another embodiment of a locking fitting 30 with a component 48 is shown in which a control curve 50 is formed. To allow a release of the control element 40 it is mounted on the component 48 in a displaceable manner a trigger 90, whereby the control element 40 can be moved out of the lock groove 56. The arrows in Figures 33A to 330 clarify the direction of movement of the trigger 90 relative to the component 48 with the curve of control 50. The component 48 is locked to the housing 34 by means of the fixing element 43 and the counterpart 44.

In Fig. 33A, the terminal section 41 of the control element 40 is in the lock groove 56 and the trigger 90 is in an initial position.

For the release of the control element 40, the trigger 90 is moved in the longitudinal direction of the component 48, so that, according to Figure 33B, the terminal section 41 of the control element 40 is moved out of the lock groove 56 and pressed against the sliding bevel 58. In another displacement of the trigger 90 according to Fig. 33C, the terminal section 41 is definitely pressed out of the lock groove 56 and moves around a tip 59 at the edge of the groove of lock 56 into section 53 in the form of a loop. In this case, the trigger 90 is arranged offset from the approach chamfer 58 and advantageously has a chamfered stop in the direction of the tip 59.

Now, by means of the force of the spring 63 the control element 40 is moved in the direction of opening along the loop-shaped section 53 of the control curve 50 (Figure 330).

In figures 34A and 34B a locking hardware 30 'is shown in which a component 48' relatively movable with respect to the trigger 90 is mounted in a housing 34. The component 48 'is loaded against the direction of removal by means of an energy accumulator in the form of a tension spring 66. The tension spring 66 is fixed to the housing 34 by means of a spring housing 67 and to the component 48 'by means of another tension spring housing. By means of a determined force adjustable by means of the force of the

5 pulling spring 66, the control curve 50 can be displaced in the direction of removal by means of the terminal section 41. The trigger 90 is fixed by a recess 91 in the housing 34 and, therefore, the control curve 50 can be moved relative to trigger 90.

Figures 35A to 35H show the process in the event of an overload situation, as can be presented by manual opening without prior activation of the ejection mechanism. The arrows in Figures 35A through 10 35H clarify the direction of movement of component 48 'with control curve 50 with respect to trigger 90.

In an overload situation, a force is exerted on the control curve 50 in the sector of the lock groove 56 through the control element 40 and its terminal section 41. The control curve 50 is displaced from the trigger 90 due to the largest contact surface of the terminal section 41 in the control curve

50. 15 The trigger 90 causes, by its inclined contact surface, the terminal section 41 to be pressed against the approach chamfer 58 (Figures 35A to 35C). The control curve 50 continues to be moved in the direction of extraction and the terminal section 41 reaches the loop-shaped section 53. Therefore, the ejection mechanism helps to open the furniture drawer 3 (Figures 35D to 35F). After tensile activation, the component 48 'with the control curve 50 is moved by the traction spring 66 back to the final position

20 against the direction of extraction. Upon closing, the terminal section can be locked again in the lock groove 56 (Figures 35F to 35H). Reference List

piece of furniture 2 furniture body

25 3 furniture drawer 4 front panel 5 removal guide 6 ejection device 7 guide housing

30 8 self-retracting device 9 guide rail 10 raceway 11 activator 12 activator

35 13 locking ratchet 13 'locking ratchet 14 guide track 15 compression spring 16 locking ratchet

40 17 guide 18 stop 19 stop 20 lock housing 21 terminal section

22

tension spring

2. 3

guide housing

24

guide housing

25

catch hook

26

stop, top, maximum as a noun, top as an adverb

27

approach chamfer

30

locking hardware

3. 4

Case

35

curved track

36

Case

38

arm

39

coupling element

40

control element

41

terminal section

42

background

43

fixing element

44

against piece

48

component I body

48 '

component

fifty

control curve

53

loop-shaped section

54

detour

55

outgoing

56

lock groove

57

accommodation

58

approach chamfer

59

output sector

60

dipstick

61

terminal section

62

disk

63

spring

64

top

65

sleeve

66

tension spring

67

spring housing

70

disk

70 '

disk

70 "disk 71 outgoing 72 channel 73 outgoing

5 80 outgoing 80 'outgoing 80 "outgoing 81 outgoing 90 trigger

10 91 recess L1 distance L2 distance

Claims (11)

one.

Opening and closing device composed of an extraction guide for a pushing element (3), in particular a furniture drawer, which has a guide rail mountable to a furniture body (2) and, movably mounted on the guide rail or a central rail disposed therebetween, a rolling track (10) movable between a maximum opening position and a closing position, an activator (12) being arranged on the track rail (10) than in the sector of The closing position is coupled with a self-retracting device, to prestress in the closed position the thrust element (3) retained in the raceway (10), an ejection device being provided for, in an unlocking, moving the raceway (10) with the pushing element (3) from the closed position in the direction of opening against the force of the self-retracting device, characterized in that two activators are provided in the raceway (10). eleven, 12), distanced from each other, attachable with the ejection device.

2.

Opening and closing device according to claim 1, characterized in that the ejection device has a spring (15), the elastic force of which is greater than the elastic force of a spring of the self-retracting device.

3.

Opening and closing device according to claims 1 or 2, characterized in that the spring (15) of the ejection device can be tensioned by a movement of the raceway (10).

Four.

Opening and closing device according to one of claims 1 to 3, characterized in that the spring (15) of the ejection device is interlocked in a tensioned position.

5.

Opening and closing device according to claims 3 or 4, characterized in that the tensioning of the spring (15) is carried out by means of a movement of the raceway which is outside the area of effectiveness of the self-retracting device.

6.

Opening and closing device according to one of claims 1 to 5, characterized in that the ejection device has a locking mechanism by means of which a locking ratchet (13) can be fixed in two positions distanced from one another.

7.

Opening and closing device according to one of claims 1 to 6, characterized in that the ejection device is locked in the closed position by means of the locking mechanism and an unlocking of the ejection device occurs by oppressing the pushing element. (3).

8.

Opening and closing device according to one of claims 1 to 7, characterized in that the ejecting device is active in the direction of opening at least in the area of the self-retracting device and for recharging a spring (15) of the ejecting device a movement of the track is used outside the sector of effectiveness of the self-retraction device.

9.

Opening and closing device according to one of claims 1 to 8, characterized in that the ejection device has a locking fitting (30) with a control element (40) movable along a control curve (50) and lockable in a blocking groove (56), the blocking groove (56) being mounted movable and / or pivoting at least in part and the control element (40) being released from the locked position at a predetermined tensile force.

10.

Opening and closing device according to claim 9, characterized in that the locking slot (56) for the control element (40) is made up of at least two moving parts relative to each other.

eleven . Opening and closing device according to claims 9 or 10, characterized in that a trigger (30) is provided by means of which the control element (40) can be moved out of the locking slot (56).