The invention relates to a rotation and pull-out fitting for a shelf in a corner cabinet, comprising a carrier that is supported in the corner cabinet to be pivotable about a vertical axis, an intermediate carrier that is rotatable relative to the carrier about an axis that is parallel with but offset from the axis of the carrier, and a pull-out guide on which the shelf can be displaced relative to the intermediate carrier.

A fitting of this type has been described in EP 1 857 019 A2. The fitting is specifically intended for use in kitchen corner cabinets wherein only one half of the front is accessible through a door whereas the other half of the front is blocked by another furniture body. When the shelf is to be drawn-out, the entire structure comprising the carrier, the intermediate carrier and the shelf is at first pivoted about the axis of the carrier. After an initial phase of this movement, the intermediate carrier engages a guide contour that is fixed relative to the cabinet body and enforces an additional rotation of the intermediate carrier relative to the carrier. In a terminal phase of the movement, the shelf can only be drawn-out of the door opening relative to the intermediate carrier. In this system, the sequence of movements is controlled such that the shelf can be brought into a position in which it projects relatively far out of the door opening and is thus readily accessible and that the shelf may have a useable surface area as large as possible so as to fully exploit the available space in the corner cabinet without the shelf interfering with the body of the corner cabinet in the course of the rotation and pull-out movement.

In the drawn-out position, the intermediate carrier and the carrier are blocked, so that, when the shelf is pushed back into the cabinet, only a linear movement of the shelf may initially take place, before the pivotal movements of the intermediate carrier and the carrier set in.

It is an object of the invention to provide a fitting of this type which provides a smoother motion sequence.

According to the invention, this object is achieved by the feature that the pivotal movement of the intermediate carrier relative to the carrier is positively guided by a guide member during the entire motion sequence, said guide member being stationary relative to the corner cabinet.

As a result, a well-defined position of the intermediate carrier is associated with each angular position of the carrier, so that the intermediate carrier does not have any additional degrees of freedom of movement. This offers the possibility to have the pivotal movement of the intermediate carrier relative to the carrier set in very smoothly, without any sensible change in the resistance to be overcome. Moreover, this construction improves the overall stability of the support of the shelf, so that the stability requirements can be fulfilled with reduced material usage and at reduced costs.

Useful embodiments and further developments of the invention are indicated in the dependent claims.

In a particularly advantageous embodiment, the shelf is directly coupled to the carrier by means of an additional guide structure. As a result, the shelf may move only on a well-defined trajectory throughout the entire motion sequence and has no additional degrees of freedom of movement. More particularly, it is possible in this way to achieve a forcible coupling between the linear pull-out movement of the shelf relative to the intermediate carrier and the rotation of the intermediate carrier relative to the carrier. Then, the rotation of the intermediate carrier and the moment of inertia thereof may already be used for enforcing the start of the linear displacement of the shelf, so that the transition from the pivotal movement to the linear displacement of the shelf will be smooth and almost imperceptible for the user.

An embodiment example will now be described in conjunction with the drawings, wherein:

Fig. 1

is a schematic plan view of a cabinet body having a shelf and a fitting according to the invention;

Fig. 2

shows the same plan view as Fig. 1, but with other parts of the fitting being highlighted;

Figs. 3 and 4

show a condition of the fitting after an initial phase of a pi- votal movement;

Fig. 5

shows the condition of the fitting in the further course of the pivotal movement;

Fig. 6

shows the condition of the fitting in the further course of the pivotal movement, with simultaneous start of a linear pull-out movement of the shelf; and

Fig. 7

shows the fitting with the shelf being drawn-out completely.

Fig. 1 shows a horizontal cross-section of a body of a kitchen corner cabinet 10 having side walls 12, a rear wall 14 and a centre post 16 which defines, together with the right side wall 12, a door opening 18, whereas the left half of the front of the cabinet is blocked by another furniture body which has not been shown. An approximately semi-circular shelf 20 is accommodated inside the cabinet. By means of a fitting 22 of which only the contour has been shown in phantom lines, the shelf 20 is held in the cabinet in such a way that it can be pivoted out of the door opening 18 and can then be pulled-out further.

The fitting 22 comprises a rigid, arcuate carrier 24 that is pivotable about a vertical axis 26 that is stationary relative to the cabinet body. The axis 22 is arranged on the side of the centre post 16 facing away from the door opening and is rotatably supported in a bracket 28 that is rigidly mounted to the cabinet body. As can be seen more clearly in Fig. 2, an intermediate carrier 30 is supported on the distal end of the carrier 24 and is pivotable relative to the carrier 24 about another vertical axis 32. On the side that is closer to the centre post, the intermediate carrier 30 has an arm 34 which carriers a guided member 36 at its free end. The guided member engages in a guide slot 38 formed in a cantilever of the bracket 28.

Moreover, the intermediate carrier 30 carries on its top side a pair of parallel guide rails 40 (shown in dot-dashed lines in the drawing), which co-operate with runners 42 arranged on the bottom side of the shelf 20.

Moreover, two arcuate guide slots 44 are formed in a mirror-image configuration in the bottom side of the shelf 20, and only the left one of these guide slots is used in the given example. The other guide slot is provided for use of the shelf in a cabinet body having the door opening 18 on the opposite side. The guide slots 44 may for example be formed directly in the shelf when the latter is moulded from plastics.

As can be seen most clearly in Fig. 2, an arm 46 projects from the carrier 24 and is formed at its free end with a guided member 48 engaged in the guide slot 44 of the shelf.

In the condition shown in Fig, 1, the intermediate carrier 30 is locked by the guided member 36 and the guide slot 38 against rotation relative to the carrier 24, so that the carrier and the intermediate carrier behave like a rigid unit. Further, the shelf 20 is locked against displacement along the runners 42 because the part of the guide slot 44 accommodating the guided member 48 is inclined relative to the runners 42.

When, now, the user wants to rotate the shelf 20 out of the door opening, he clasps with his hand the edge of the shelf through the door opening and pulls the shelf forward. As a result, the shelf 20 and the fitting 22 rotate as a rigid unit about the axis 26. As can be seen in Fig. 1, the leftmost terminal portion of the guide slot 38 is shaped as a circular arc around the axis 26, so that, in the course of the rotation, the guided member 36 may move in the guide slot 38 while continuing to block the intermediate carrier 30 against rotation relative to the carrier 24.

Only when the condition shown in Figs. 3 and 4 has been reached, the guided member 36 enters into a portion of guide slot 38 which gradually retreats from the axis 26. Consequently, an additional pivotal movement of the intermediate carrier 30 and the shelf 20 about the axis 32 is enforced in the further course of the rotation of the carrier.

Fig. 5 shows a somewhat later stage of the motion sequence. The carrier 24 has been pivoted clock-wise about the axis 26, and the intermediate carrier 30 has started with its pivotal movement about the axis 32, also in clock sense. As a result of this pivotal movement relative to the carrier 24, the lower edge of the guide slot 44 in Fig. 4 runs onto the guided member 48 that is rigidly held at the carrier 24, as has been symbolised by an arrow A in Fig. 5. The resulting force which the guided member 48 exerts onto the guide slot 44 is directed orthogonally to the guide slot and has a component in parallel with the runners 42 and thus enforces the start of the linear displacement of the shelf 20 along the guide rails. This displacement is assisted by the user pulling the shelf with his hand. In this way, the pivotal movement of the fitting is superposed by a pull-out movement, which gradually sets in, of the shelf 20.

Fig 6 shows yet a later stage of the motion sequence. The carrier 24 and the intermediate carrier 30 have continued their pivotal movements, and the guided member 48 has travelled a considerable distance in the inclined branch of the slot 44, so that the shelf 20 with its runners 42 has moved a corresponding distance along the guide rails 40.

In Fig. 7, the final stage of the movement has finally been reached. The carrier 24 has been rotated into its end position in which the end carrying the axis 32 is located already outside of the door opening. Since the intermediate carrier 30 and, eventually, the shelf 20 are supported by the carrier 24 at the location of the axis 32, the shelf can bear a high load even in the completely puled-out position.

The guided member 36 has reached the end of the guide slot 38, so that the movement of the intermediate carrier 30 has stopped as well. The guided member 48 mounted on the carrier 24 has reached the end of the guide slot 44 after having passed through a straight portion of this guide slot that extends in parallel with the runners 42. In this phase, the only movement that has taken place was the linear displacement of the shelf relative to the intermediate carrier. As a result of the curved shape of the guide slot 44, the pivotal movement of the intermediate carrier relative to the carrier has been braked smoothly when the guided member 48 has travelled through the guide slot, and the superposed rotation and linear displacement has smoothly merged into a pure linear displacement. Moreover, in the position shown in Fig. 7, the carrier 24 cannot be pivoted about the axis 26, not even in counter-clock sense in Fig. 7. As long as the guided member 48 is located in the straight branch of the guide slot 44 that extends in parallel with the runners 42, the intermediate carrier 30 cannot be pivoted relative to the carrier 24 about the axis 32, so that the carrier 24 and the intermediate carrier 30 behave again like a rigid unit. If one attempts to rotate this unit about the axis 26, then the guided member 36 mounted on the intermediate carrier would have to move on a circular trajectory about the axis 26. This, however, is prevented by the shape of the guide slot 38.

The same effect prevents the shelf 20 from abutting at the side wall 12 of the cabinet body when the shelf 20 is pushed back into the door opening. In the further course of the push-in and rotary movement, the forcibly guided movements that have been described about are performed in opposite sequence, until the condition shown in Figs. 1 and 2 has been reached again.