초록 ▼

Closing and opening device for drawer pull-out guides (10) with a guide rail (12) to be fixed on a carcass wall of a piece of furniture and a running rail (14) which is mounted so as to be displaceable relative to the guide rail—optionally with a central rail (11) interposed—and is to

Closing and opening device for drawer pull-out guides (10) with a guide rail (12) to be fixed on a carcass wall of a piece of furniture and a running rail (14) which is mounted so as to be displaceable relative to the guide rail—optionally with a central rail (11) interposed—and is to be fixed on the drawer. On a latch housing (22) disposed on one of the two aforementioned outer rails there is provided a movable catch component (24) which is pretensioned by a spring arrangement in a bistable manner into two end positions spaced from one another in the direction of movement of the drawer, and the catch component has a seat (36) for a dog (26) which is provided on the other rail and which moves into the seat during the relative displacement of the rails as the closed position is approached and pivots the pretensioned movable catch component (24) and thereby unlocks it from the associated end position. The catch component is moved under the action of the spring tension into the other end position and by way of the dog (26) held in the seat (36) it entrains the rail associated therewith in the direction of retraction of the drawer. An opening and closing device (20) which acts on the catch component (24) on the one hand and on or in the catch housing (22) on the other hand and which, when a pushing in movement in the direction of closing the drawer is exerted on the drawer which is retained in the closing position by the closing and opening device, displaces the catch component (24) and by way of the dog (26) engaging in the seat (36) of the catch component it displaces the running rail (14) and thus a drawer held on the running rail by a predetermined amount in the direction of opening the drawer.

대표청구항 ▼

The invention claimed is: 1. Closing and opening device for drawer pull-out guides with a guide rail to be fixed on a carcass wall of a piece of furniture and a running rail which is mounted so as to be displaceable relative to the guide rail and is to be fixed on the drawer, wherein, on a catch ho

The invention claimed is: 1. Closing and opening device for drawer pull-out guides with a guide rail to be fixed on a carcass wall of a piece of furniture and a running rail which is mounted so as to be displaceable relative to the guide rail and is to be fixed on the drawer, wherein, on a catch housing disposed on one of two aforementioned rails, a movable catch component is provided and is pretensioned by a spring arrangement in a bistable manner into two end positions spaced from one another in a direction of movement of the drawer, and the catch component has a seat for a dog which is provided on the outer rail and moves into the seat during the relative displacement of the rails as a closed position is approached and pivots the pretensioned movable catch component and thereby unlocks it from the associated end position, as a result of which the catch component is moved under the action of the spring tension into the other end position and by way of the dog held in the seat it entrains the rail associated therewith in the direction of retraction of the drawer, wherein the closing and opening device has a touch-latch mechanism that acts on the catch component or acts on or in the catch housing, wherein, when a pushing-in movement in a direction associated with closing the drawer is exerted on the drawer that is retained in the closed position by the closing and opening device, the touch-latch mechanism displaces the catch component and, by way of the dog engaging in the seat of the catch component, the touch-latch mechanism displaces the running rail and the drawer held on the running rail by a predetermined amount in a direction associated with opening the drawer. 2. The device according to claim 1, wherein the closing and opening device has an elongate hollow housing, one end of which is retained on or in the catch housing, wherein a coupling rod disposed so as to be longitudinally displaceable in the hollow housing is guided out of the other end of the housing and the end of the coupling rod projecting out of the hollow housing is coupled to the catch component, and that co-operating functional elements of the touch-latch mechanism are provided on the opposing end of the coupling rod received in the hollow housing and in the housing facing away from the catch component, and that the coupling rod is pretensioned by a pretensioned spring in the direction of a longitudinal displacement towards the catch component. 3. The device according to claim 2, wherein the free end of the coupling rod projecting out of the elongate hollow housing is coupled in an articulated manner on the catch component in such a way that the catch component is pivotable relative to the end of the coupling rod. 4. The device according to claim 3, wherein on the end of the coupling rod there is provided a joint head of substantially circular cross-section which for pivotable coupling on the catch component engages in a joint head seat in the catch component delimited in the shape of a circular arc over more than 180°, and that in the region which is open towards the coupling rod the joint head seat is constructed so that it is resiliently expandable in such a way that when a predetermined tensile force is exerted on the coupling rod or on the catch component the joint head disengages from the joint head seat in the sense of separating these parts from one another as the open mouth region expands resiliently. 5. The device according to claim 4, wherein the joint head has the shape of a ball head which is connected to the end of the coupling rod by way of a short connecting shank with a cross-sectional diameter which is reduced by comparison with the diameter of the ball head. 6. The device according to claim 2, wherein the touch-latch mechanism has a cam of cardioid shape which is provided in the interior of the elongate hollow housing and in which a control projection provided on the end of the coupling rod within the housing engages. 7. The device according to claim 6, wherein the control projection projects from the free end of a lever which is mounted on the end of the coupling rod within the housing so as to be pivotable about a control projection which engages in the cam parallel to a longitudinal central axis of the control projection. 8. The device according to claim 6, wherein, in a central portion of the interior of the elongate hollow housing, the coupling rod is guided so that it is displaceable in the longitudinal direction of the housing but is not rotatable relative to the housing. 9. The device according to claim 6, wherein the elongate hollow housing has at least two housing halves put together along a plane extending approximately centrally through the housing in the longitudinal direction, of which one is provided with the cam in the interior of its end region remote from the catch component, whilst the interior of the other housing half lying opposite the housing half provided with the cam is of hollow construction in such a way that the control projection provided on the end of the coupling rod within the housing can follow the transverse movements transmitted to it during a longitudinal displacement of the coupling rod by the cam, and that the spring under compression pretension is supported on or in the end region of the hollow housing nearest the catch component and in the region of the coupling of the coupling rod on the catch component. 10. The device according to claim 6, wherein the control projection is disposed so as to be displaceable transversely with respect to the longitudinal direction of the coupling rod but in the longitudinal direction of the coupling rod is not displaceable on the end of the coupling rod within the housing. 11. The device according to claim 10, wherein the end of the coupling rod within the housing has a guide head which is widened transversely with respect to the longitudinal direction of the coupling rod, wherein in the side of the guide head directed towards the cardioid-shaped cam a transversely extending guide groove is provided in which a support element is displaceably mounted, wherein the control projection projects from the underside of the support element facing the cam and engages in the cam. 12. The device according to claim 11, wherein the support element can advantageously have the shape of a cylindrical body of which the height is substantially equal to the depth of the guide groove and the diameter is equal to the width of the guide groove, wherein the control projection which engages in the cardioid-shaped control groove projects centrally from the end face of the body facing the cam. 13. The device according to claim 12, wherein the control projection has the shape of a pin with a circular cross-section in which the diameter is equal to the width of the cardioid-shaped control groove. 14. The device according to claim 13, wherein there is provided centrally in the base of the guide groove of the guide head an elongate hole in which a guide pin with a circular cross-section engages which projects centrally from the end face of the cylindrical body remote from the cam, the diameter of the guide pin being substantially equal to the width of the elongate hole. 15. The device according to claim 12, wherein there is provided centrally in the base of the guide groove of the guide head an elongate hole in which a guide pin with a circular cross-section engages which projects centrally from the end face of the cylindrical body remote from the cam, the diameter of the guide pin being substantially equal to the width of the elongate hole. 16. The device according to claim 1, wherein the elongate hollow housing has the external shape of an elongate cylinder. 17. The device according to claim 1, wherein the elongate hollow housing is supported at its end remote from the catch component on a stop which is adjustable in the longitudinal direction of the catch housing. 18. The device according to claim 17, wherein the stop is formed by an end surface of a setscrew screwed into a threaded bore in the catch housing. 19. The device according to claim 17, wherein the stop is formed by a set wheel which projects on an end face of the housing remote from the catch component, is screwed on with a threaded lug and provided with a complementary threaded hole. 20. The device according to claim 19, wherein the spring is formed by at least one helical spring fitted under compression pretension. 21. The device according to claim 17, characterised in that between the adjustable stop and the catch housing a spring is provided which cushions jerky stresses transmitted to the components of the touch-latch mechanism via the catch component as a drawer is closed. 22. The device according to claim 1, wherein the elongate hollow housing is guided so as to be longitudinally displaceable in the catch housing and its end remote from the catch component is supported in the catch housing by way of an interposed pretensioned spring, and that a stop which delimits the displacement path of the elongate hollow housing in the direction toward the catch component due to the pretension of the interposed spring is provided in the catch component. 23. The device according to claim 22, wherein the stop surface of the stop which supports the housing is constructed so as to be adjustable in the direction of displacement of the elongate housing. 24. The device according to claim 23, wherein the stop surface is formed by the free end of a shank of an adjusting screw which is screwed into a threaded bore in the catch housing and engages on a matching surface of the elongate housing, wherein the end of the adjusting screw lying opposite the matching surface is guided out of the catch housing and is provided with means for turning the shank. 25. The device according to claim 24, wherein the adjusting screw is provided in the catch housing so that it is oriented obliquely with respect to the direction of displacement of the elongate housing in such a way that when the shank of the adjusting screw is turned in the direction of screwing into the threaded bore the elongate housing is advanced against the direction of action of the pretension of the spring and when the shank is turned in the opposing direction the housing is advanced in the direction of action of the pretension of the spring. 26. The device according to claim 25, wherein the catch housing is provided with means for fixing on the underside of the guide rail of an associated pull-out guide in such a way that the catch component with the seat projects laterally adjacent to the guide rail in the direction towards the running rail, and that the dog provided on the running rail protrudes into the displacement path of the seat in the catch component. 27. The device according to claim 26, wherein the catch housing is constructed so that in the prescribed fixing position of the catch housing the catch component and the dog are provided on the guide rail laterally adjacent to the side thereof which faces the carcass.