Furniture pull-out

Abstract

Furniture extension with a front piece (18) held on extension rails (12) and with a brake (20) having two brake mechanisms (22), each assigned to one of the extension rails (12) and each having a force transmission element (24) extending along the extension rail (12) and a rubber-elastic brake body (32) connected to the force transmission element (24), which is displaceable in a stationary, tubular retaining body (28) and which is axially compressible by the force transmission element (24) and thus expandable in the circumferential direction so that it is held force-fit in the retaining body (28), and with an actuating unit (26) with an actuating lever (40) which is displaceably and pivotably held in a console (42) attached to the front piece (18) and additionally connected to the console (42) via a toggle lever (48) and thus against the toggle lever (48) is pre-tensionedthat it is held stably in its end positions on both sides of a dead center position of the knee joint lever (48), characterized in that each brake mechanism (22) has its own actuating unit (26) which is connected to one end of the associated force transmission element (24), and that the actuating levers (40) are connected by a handle (56) which extends along the front piece (18) and by which the actuating levers (40) can be pivoted synchronously.

Description

[0001] The invention relates to a furniture extension with a front piece held on extension rails and with a brake having two braking mechanisms, each assigned to one of the extension rails and each having a force transmission element extending along the extension rail and a rubber-elastic brake body connected to the force transmission element, which is displaceable in a stationary, tubular retaining body and which is axially compressible by the force transmission element and thereby expandable in the circumferential direction so that it is held force-fit in the retaining body, and with an actuating unit with an actuating lever which is displaceably and pivotably held in a console attached to the front piece and is additionally connected to the console via a toggle lever and is pre-tensioned against the toggle lever in such a way that it is held stably in its end positions on both sides of a dead center position of the toggle lever.

[0002] In particular, the invention relates to a furniture extension for table or cabinet furniture, which makes it possible to extend an insert panel from a storage position below the tabletop or worktop of the furniture and to bring it into a position adjacent to the worktop, thus increasing the available work surface.

[0003] From DE 20 2015 102 300 U1, an extension of this type is known which can be continuously locked in any desired extension position by means of the brake. This extension has a common actuating unit for the two braking mechanisms, which is located in the middle of the front section and is connected to the braking mechanism via pull cables.

[0004] DE 81 16 211 U1 and DE 103 47 009 A1 show drawers with locking devices that are operated via a handle.

[0005] The object of the invention is to create an extension mechanism with an easier-to-use brake.

[0006] This problem is solved according to the invention in that each brake mechanism has its own actuating unit which is connected to one end of the associated power transmission element, and that the actuating levers are connected by a handle which extends along the front piece and by which the actuating levers can be pivoted synchronously.

[0007] Since the handle extends across the entire width of the front section, the user wishing to operate the brake simply needs to reach under the front section at any point and pull the handle towards or away from it. Because both ends of the handle are attached to the operating levers of the two actuating units, this triggers a synchronous pivoting motion of the two operating levers, which releases or engages the brake. A further advantage of this design is that the force transmission elements can be easily designed as rigid, straight pull or push rods extending along the extension rails.

[0008] A further advantage is that the braking mechanisms and actuating units can be identical in construction to the braking mechanisms and actuating units used in the extension according to the prior art discussed at the beginning, thus enabling the rational production of extension systems with differently designed brakes.

[0009] Advantageous designs and further developments are specified in the subclaims.

[0010] The following section explains an exemplary embodiment in more detail with reference to the drawing.

[0011] They show: Fig. 1 A schematic representation of a furniture pull-out with brake in a view from below; Fig. 2 and Fig. 3 sectional views of a braking mechanism. Fig. 4 an enlarged view of an actuating unit with the brake released; and Fig. 5 the actuating unit with the brake applied.

[0012] The in Fig. The furniture extension 10 shown has a pair of extension rails 12 which are guided in a known manner by means of two- or multi-stage extension guide sets 14 on a piece of furniture (not shown), for example, on the body of a cabinet or on a table frame below the tabletop. Each extension guide set 14 has a guide rail 16 on which the extension rail 12 is slidably guided. The guide rail 16 can be fixed to the furniture. Alternatively, it can also be another stage of a multi-stage telescopic extension.

[0013] The extension rails 12 can, for example, be used to attach an insert panel (not shown here), which can then be pulled out from a storage position beneath the tabletop or worktop of the furniture into a usable position using the extension mechanism. The free ends of the extension rails 12 are connected by a front piece 18 that extends at right angles to the extension rails. For example, the front piece 18 can be a cover that conceals the other parts of the furniture extension when it is retracted.

[0014] The furniture extension 10 has a brake 20 that allows the extension to be locked steplessly in different extended positions. The brake 20 is formed by two brake mechanisms 22, each integrated into one of the extension guide sets 14. Each brake mechanism 22 is connected via a force transmission element 24 to an actuating unit 26, which is attached to the underside of the front piece 18. In the example shown, each force transmission element 24 is a rigid tube that extends along the extension rail 12 and is displaceable in its longitudinal direction.

[0015] Each braking mechanism 22 has a tubular retaining body 28 which is fixedly attached to the guide rail 16 or optionally integrated into the guide rail and extends parallel to the extension rail 12, so that the force transmission element 24 can penetrate deeper into the retaining body 28 during the insertion movement of the furniture extension.

[0016] The braking mechanisms 22 have an identical design, and one of them is representative in Fig. 2 and Fig. Figure 3 shows an axial section. The tubular force transmission element 24, which extends into the retaining body 28, is closed at its end by a plate 30 on which a cylindrical brake body 32 made of rubber-elastic material is supported. Another plate 34 is arranged at the opposite end of the brake body 32. A tie rod 36 runs through the interior of the force transmission element 24 and through axial bores in the brake body 32 and the plates 30, 34, and is supported by an end piece 38 on the rear plate 34.

[0017] If a thrust force is applied to the force transmission element 24 while the pull rod 36 is held stationary on the furniture extension, the brake body 32 is consequently compressed axially, expanding radially as shown in Fig. Figure 3 shows that the circumferential wall of the brake body 32 comes into frictional contact with the inner surface of the tubular retaining body 28. At the same time, the compression of the brake body 32 increases the frictional engagement with the pull rod 36, so that the force transmission element 24 and the pull rod 36, and with them the entire furniture extension, are frictionally fixed in the respective extended position.

[0018] Based on the Fig. 4 and Fig. Section 5 will now explain how a thrust force can be exerted on the force transmission element 24 with the help of the actuating unit 26. Fig. Figure 4 shows the actuating unit 26 in the released brake position. An actuating lever 40 is pivotally and slidably mounted on a bracket 42, which is located on the underside of the front piece 18. The bracket has an elongated hole 44 into which an axle pin 46 of the actuating lever 40 engages. Additionally, the actuating lever 40 is connected via a toggle lever 48 to an axle pin 50 of the bracket 42, to which the pull rod 36 is attached. The pull rod runs through a transverse bore in the axle pin 46 and then enters the tubular force transmission element 24. The force transmission element 24 rests against the axle pin 46 and is biased against it by a spring 52.

[0019] In the Fig. In the state shown in Figure 4, the actuating lever 40 is pivoted downwards, and the axle bolt 46 is located at the front end of the elongated hole 44. Thus, the force transmission element 24 is held in a forward-moving position, i.e., pushed away from the brake body 32, which corresponds to the relaxed state of the brake body. Fig. 2 corresponds.

[0020] A handle 56 is attached to the free end of the actuating lever 40 by means of a clamping screw 54, and extends parallel to the front piece 18 (see Fig. 1) and its other end is attached in a corresponding manner to the actuating lever 40 of the other actuating unit 26.

[0021] When the user reaches under the front piece 18 with their hand and grasps the handle 56 with their fingers and pulls it upwards towards the front piece, the two actuating levers 40 are synchronously moved into the Fig. The position shown in Figure 5 is pivoted. The knee joint lever 48 forces a lateral movement of the axle bolt 46, and thus of the force transmission element 24, to the left. Fig. 4. Because the pull rod 36 is held on the console 42, a shear stress is generated that compresses the brake body 32. The user must overcome the elastic restoring force of the two brake bodies 32 and the springs 52 with their fingers. However, as soon as the toggle lever 48 has passed its dead center position, in which its joints are in line with the axle bolt 46, the restoring force of the brake body and the spring causes a further pivoting movement of the actuating lever 40 into a stable end position, which is in Fig. 5 is shown. In this end position, the brake body 32 is in a compressed state ( Fig. 3) held so that the brake remains engaged. In this way, the extension can be locked in any desired extended position.

[0022] To release the locking mechanism, the user presses the handle 56 downwards with their fingers until the actuating levers 40, after overcoming the dead point of the knee joint levers 48, return to their original position. Fig. Return to position 4 as shown. REFERENCE MARK LIST 10 Furniture pull-out 12 extension rail 14 Extension guide set 16 guide rail 18 Front piece 20 brake 22 Brake mechanism 24 Power transmission element; 26 Actuating unit 28 retaining bodies 30 plates 32 brake bodies 34 plate 36 pull rod 38 End piece 40 operating levers 42 console 44 slotted holes 46 axle bolts 48 Knee joint lever 50 axle bolts 52 springs 54 clamping screw 56 Handlebar

Claims

[1] Furniture extension with a front piece (18) held on extension rails (12) and with a brake (20) having two brake mechanisms (22), each assigned to one of the extension rails (12) and each having a force transmission element (24) extending along the extension rail (12) and a rubber-elastic brake body (32) connected to the force transmission element (24), which is displaceable in a stationary, tubular retaining body (28) and which is axially compressible by the force transmission element (24) and thus expandable in the circumferential direction so that it is held force-fit in the retaining body (28), and with an actuating unit (26) with an actuating lever (40) which is displaceably and pivotably held in a console (42) attached to the front piece (18) and additionally connected to the console (42) via a toggle lever (48) and thus against the toggle lever (48) is pre-tensioned,that it is held stably in its end positions on both sides of a dead center position of the knee joint lever (48), , characterized by , that each brake mechanism (22) has its own actuating unit (26) which is connected to one end of the associated power transmission element (24), and that the actuating levers (40) are connected by a handle (56) which extends along the front piece (18) and by which the actuating levers (40) can be pivoted synchronously. [2] Furniture extension according to claim 1, wherein the force transmission element (24) is a rigid push rod which, when the brake is applied, presses on one end of the brake body (32). [3] Furniture extension according to claim 2, wherein the force transmission element (24) is tubular and accommodates a pull rod (36) which is anchored at one end to the second end of the brake body (32) and at the other end to the console (42). [4] Furniture extension according to one of the preceding claims, comprising a spring (52) which elastically preloads an end of the force transmission element (24) against the actuating lever (40). [5] Furniture extension according to one of the preceding claims, wherein the force transmission element (24) is biased against the actuating lever (40) by the elastic restoring force of the rubber-elastic brake body (32).

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