Patent Description:
The known shelving units are generally constituted by one or more vertical posts on which shelves are mounted. Usually, to fix the shelves at a given height on the post it is possible to proceed according to two methods: a first method according to which the post is provided with fixing means at precise points, for example holes, supports of various types perpendicular to the post etc., and a second method according to which the supports are configured in such a way that they can be fixed to the post in any position, for example by means of screw that are tightened on the surface of the post etc..

The first method is not very flexible, as the height of the shelves is predetermined and invariable. Furthermore, to ensure that a sufficient number of configurations is possible, the posts are usually provided with a number of fixing means that is larger than the number of shelves. This solution, in addition to being ineffective - as it requires the presence of a given number of fixing means that will not be used - generally is also rather unpleasant in terms of appearance.

The second mode is complex, as it requires that the position of each individual fixing means along the post be defined manually. This is generally obtained by means of a screw that, being inserted in a threaded hole in the fixing means, exerts pressure on the post. The screw must be tightened with enough force to maintain the shelf in the correct position, which requires a certain effort by the user. Furthermore, the number of screws to be tightened can increase quickly and the operation can become hard. Finally, when the screw is tightened on the post, there is the risk of tightening excessively, thus damaging the surface of the post, which would make it impossible to reposition the fixing means successively and leave the damaged surface exposed.

The present invention has been developed taking in consideration the drawbacks specified above. It is one object of the invention to overcome one or more of the drawbacks described above.

More specifically, it is one object of the invention to provide a self-locking support for shelving units. The term "self-locking" means that the locking of the support on the respective post takes place automatically, preferably thanks to the weight applied to the support. Among the objects of the invention there is also the object to provide a support that can be easily released in such a way as to allow it to be quickly positioned.

Shelf supports according to the prior art are known from documents <CIT>, <CIT> and <CIT>.

The inventor has generally found out that it is possible to use a self-locking element, within the self-locking support, which is locked by the movement caused by the weight applied to the self-locking support and/or by the action of a moving element acting on the self-locking element.

This can be done, as described in greater detail below, by means of a seat created in the moving element in such a position that a movement of the moving element, due to the weight and/or to the moving element, causes the self-locking element to be fixed between its seat in the self-locking support and the post.

An embodiment of the invention is defined in the independent claim. The dependent claims describe further embodiments offering specific advantages that are evident from the following description.

<FIG> represent a first embodiment of a self-locking support <NUM> for a shelving unit <NUM>. The shelving unit <NUM> can be seen, for example, in <FIG>.

The shelving unit <NUM> comprises at least one post <NUM> for the installation of the self-locking support <NUM>. As illustrated in <FIG>, a plurality of posts <NUM> and a plurality of self-locking supports <NUM> make it possible to mount one or more shelves at a desired height, in a manner that is evident from the following description.

As can be seen in <FIG>, the self-locking support <NUM> comprises a frame <NUM> extending longitudinally along at least a first axis Y. The frame is generally to be intended as a supporting structure that keeps together the various components of the self-locking support <NUM> which are described below. Clearly, the frame <NUM> can be made in one or more portions, if necessary joined during the production stage.

Furthermore, the self-locking support <NUM> comprises a first self-locking element <NUM> and a first moving element <NUM> associated with the first self-locking element <NUM>.

More specifically, the embodiment shown in <FIG> comprises four self-locking elements <NUM> and two moving elements <NUM>. As is evident from the following description, the number of self-locking elements <NUM> and the number of moving elements <NUM> are not necessarily limited to four and two, respectively, and it is possible to carry out embodiments with a different number of self-locking elements <NUM> and moving elements <NUM>.

For the sake of clarity, the following description refers to a single self-locking element <NUM> corresponding to the element at the bottom left of <FIG>, which corresponds to the self-locking element at the bottom of <FIG>. Clearly, the embodiment may work, as described, using just this individual self-locking element <NUM> and the moving element <NUM> acting on it. The function of the further self-locking elements illustrated is evident from the description and is illustrated in greater detail below.

The self-locking element <NUM> has generally the characteristic function to stop the movement of the frame <NUM> with respect to the post <NUM>, as is evident from the following description. In particular, the self-locking element <NUM> interacts with the post <NUM> and with the frame <NUM> in such a way as to increase the friction it exerts on these two elements as the self-locking element <NUM> moves. The movement of the self-locking element <NUM> is determined by a seat created in the frame <NUM>. Generally, the configuration of the seat is such that when a weight is applied to the self-locking support <NUM>, a force is produced which causes the self-locking element <NUM> to become fixed more firmly between the post <NUM> and the frame <NUM>. In other words, the effect of a weight, for example of a shelf and/or of the objects placed on the shelf, causes the self-locking element <NUM> to move along its seat in such a way as to increase friction between the post <NUM> and the frame <NUM>. This characteristic guarantees the self-locking function of the self-locking support <NUM>. More specifically, the more weight is applied to the self-locking support <NUM> the more the latter will tend to remain stationary with respect to the post <NUM>, thus guaranteeing the stability of the shelving unit.

In this and in successive embodiments, a specific solution has been selected to illustrate the self-locking element <NUM>. Clearly, this as well as the successive embodiments are not limited to this specific configuration of the self-locking element and that the self-locking element can have different configurations, some of which are illustrated, for example, in <FIG> and described below.

As shown by the broken lines, especially in <FIG> and <FIG>, the frame <NUM> comprises a first seat <NUM> for the first self-locking element <NUM>. Clearly, the shape of the seat generally depends on the shape of the self-locking element <NUM> which moves in the seat <NUM>. Generally, however, the seat <NUM> is configured in such a way as to allow the first self-locking element <NUM> to move from a free position to a locked position. More specifically, <FIG> show the first self-locking element <NUM> in the free position, while <FIG> show the same element in the locked position.

In particular, the movement of the first self-locking element <NUM> can be affected by one or more factors, such as the contact with the post <NUM>, the action of the moving element <NUM>.

In the embodiment illustrated in <FIG>, with reference, as explained, to the self-locking element <NUM> at the bottom left of <FIG>, and in the presence of a downward movement of the self-locking support <NUM>, the contact with the post <NUM> causes the self-locking element to move upwards, in direction Y. Thanks to the shape of the seat <NUM>, the above also results in a movement of the self-locking element <NUM> in the direction of the post <NUM>, that is, in direction Z.

This movement is particularly evident when comparing <FIG> with <FIG>.

In other words, according to the invention, for the self-locking element <NUM> at the bottom left of <FIG>, the contact with the post moves the self-locking support <NUM> downwards and results in a movement of the self-locking support <NUM> from a free position to a locked position. It is thus evident that when a weight is applied to the self-locking support <NUM>, the self-locking element <NUM> at the bottom left of <FIG> moves automatically to a locked position, guaranteeing the stability of the self-locking support <NUM> with respect to the post <NUM>.

The action of the moving element <NUM> can be of help both for releasing and for locking the self-locking support <NUM>. As regards the embodiment of <FIG>, the moving element <NUM> facilitates the locking of the self-locking support, as is evident from the following description.

The first seat <NUM> has at least one surface at an angle with respect to the longitudinal extension of the post <NUM>. More specifically, at least one surface along which the self-locking element <NUM> slides is at an angle as explained.

It is thus evident that, sliding upwards in direction Y along the seat <NUM>, the self-locking element <NUM> at the bottom left of <FIG> moves near the post <NUM> and causes the self-locking support <NUM> to become locked with respect to the post <NUM>. It will also be clear that this makes it possible to position the self-locking support <NUM> at any height on the post <NUM> and then lock it in that position thanks to the upward movement of the self-locking element <NUM> at the bottom left of <FIG>.

The upward movement of the self-locking element <NUM> at the bottom left of <FIG> may, in particular, be automatic when the self-locking element <NUM> comes in contact with the post <NUM> with such friction as to keep it in position, thus preventing it from falling in the seat <NUM> due to the weight of the self-locking element <NUM>.

To facilitate and/or start said upward movement, the self-locking support <NUM> comprises the moving element <NUM> which, in this case, is configured in such a way as to facilitate the movement of the self-locking element <NUM> from the free to the locked position.

More specifically, in the embodiment shown in <FIG>, the first moving element <NUM> is an elastic element. Said elastic element is positioned and configured in such a way as to move the self-locking element <NUM> from the free position to the locked position. In the embodiment of <FIG> the elastic element is illustrated only schematically, as the expert in the art certainly knows how to implement it with a spring and/or an elastic band working under traction.

The presence of the moving element <NUM> also makes it possible to use the self-locking support <NUM> on a horizontal post <NUM>. It is clear, in fact, that the moving element <NUM> brings the self-locking element <NUM> towards the locked position. In this position, the moving element <NUM> guarantees maintaining the locked position, even if there is no locking action due to the weight as described above. Thus, this configuration is stable in any case. It can be noted, in fact, that with a horizontal post <NUM>, even if there is no locking action due to the weight of the shelf, the shelf does not tend to move, either, due to the weight itself. Thus, the fact that these two effects compensate for each other advantageously makes it possible to keep the self-locking support in the locked position thanks to the presence of the moving element <NUM>.

The self-locking support of <FIG> furthermore comprises a second self-locking element <NUM>, at the top left of <FIG>, in addition to the already described first self-locking element <NUM>, at the bottom left of <FIG>.

In the embodiment illustrated, the first self-locking element <NUM> and the second self-locking element <NUM> are positioned on the same side of the self-locking device with respect to the tube <NUM>. Furthermore, the seat <NUM> of the first self-locking element <NUM> and the seat of the second self-locking element <NUM> are substantially symmetrical with respect to a plane XY perpendicular to the direction Y of longitudinal extension of the post <NUM>.

The above results in the second self-locking element <NUM> tending to work in the opposite way with respect to the first self-locking element <NUM>, in relation to the movement of the self-locking element caused by the movement of the self-locking support <NUM> with respect to the post <NUM>. More specifically, in the case of a downward movement of the self-locking support <NUM>, the first self-locking element <NUM> tends to move from the free position to the locked position, while the second self-locking element tends to move from the locked position to the free position. Therefore, the presence of the second self-locking element <NUM> advantageously allows the self-locking support <NUM> to be inserted in the post <NUM> with any orientation.

In the embodiment illustrated, the first moving element <NUM> exerts traction on both the first self-locking element <NUM> and the second self-locking element <NUM>. This advantageously makes it possible to use a single moving element <NUM>. It is clear, however, that each self-locking element <NUM> can be provided with its moving element <NUM> like, for example, in the embodiment illustrated in <FIG>. The use of just one first moving element <NUM> for the first and the second self-locking element <NUM> advantageously makes it possible to reduce the number of moving elements <NUM>, thus reducing costs.

The self-locking support of <FIG> comprises also a third self-locking element <NUM>, at the bottom right of <FIG>, in addition to the already described first self-locking element <NUM>, at the bottom left of <FIG>.

In the embodiment illustrated, the first self-locking element <NUM> and the third self-locking element <NUM> are positioned on opposite sides of the self-locking device with respect to the tube <NUM>. Furthermore, the seat <NUM> of the first self-locking element <NUM> is substantially symmetrical with respect to the direction of longitudinal extension Y of the post <NUM>.

This results in the third self-locking element <NUM> tending to work similarly to the first self-locking element <NUM> in relation to the movement of the self-locking element caused by the movement of the self-locking support <NUM> with respect to the post <NUM>. More specifically, in the case of a downward movement of the self-locking support <NUM>, both the first self-locking element <NUM> and the third self-locking element <NUM> tend to move from the free position to the locked position. Thus, the presence of the third self-locking element <NUM> advantageously allows the self-locking support <NUM> to be locked more securely on the post <NUM>.

In other words, the action of the first self-locking element <NUM> during the locking stage tends to push the self-locking support <NUM> in a first direction, Z negative in <FIG>. At the same time, the action of the third self-locking element <NUM> during the locking stage tends to push the self-locking support <NUM> in a second direction, Z positive in <FIG>, opposite the first direction. In this way, the combined action of the first and the third self-locking elements <NUM> not only makes it possible to improve the grip on the post <NUM> during the locking stage but, since both self-locking elements move to come in contact with the post <NUM>, they allow the support <NUM> and/or the post <NUM> to be carried out with higher production tolerances. Actually, compared to the movement of the single first self-locking element <NUM>, the double clamping movement of the first and the third self-locking elements <NUM> may better compensate for any difference in size due to production tolerances.

The self-locking support shown in <FIG> furthermore comprises a fourth self-locking element <NUM>, at the top right of <FIG>. The function of the fourth self-locking element <NUM> is substantially identical to that of the second self-locking element <NUM>.

Clearly, the embodiment of <FIG> can be implemented through any combination of first, second, third and fourth self-locking element <NUM>.

The frame <NUM> of the self-locking support <NUM> of <FIG> comprises three sides <NUM>, <NUM>, <NUM> substantially in the shape of a U. This shape is particularly advantageous, as it makes it possible to insert the self-locking support <NUM> in the post <NUM> from the open side of the U. In alternative embodiments, however, the number of sides can be different.

The self-locking element <NUM> of the self-locking support <NUM> of <FIG> generally has an elongated shape extending along a rotation axis of the same, with one part having a first predetermined radius and one part having a second predetermined radius which is longer than the first predetermined radius. This configuration advantageously makes it possible to use the part with the second predetermined radius as a projection acting on the post <NUM>. In the embodiment illustrated, furthermore, the post <NUM> comprises a groove <NUM> whose size substantially corresponds to or exceeds the extension of the part with the second predetermined radius along the rotation pin of the self-locking element <NUM>. In this way, it is advantageously possible for the part with the second predetermined radius to slide within the groove <NUM>. This configuration also makes it possible to fix the self-locking support <NUM> to the post <NUM> in the plane XZ, as the interaction between the self-locking element <NUM>, more specifically its area with the second predetermined radius, and the groove <NUM> prevents any relative movement of the two elements in direction X. It is evident, however, that alternative embodiments of the self-locking element are possible, which are described here below.

The post <NUM> is illustrated as having a substantially square cross section with two grooves <NUM> on two opposite sides. From the following description it is clear, however, that the number of grooves <NUM> is not necessarily limited to two, exactly as the cross section of the post <NUM> is not necessarily square. By way of example, it is possible to make grooves <NUM> even on other sides of the post <NUM>, as illustrated in <FIG>, which makes it possible to connect the self-locking support <NUM> to the post <NUM> in various directions.

In the embodiment illustrated in <FIG> the seat <NUM> comprises, as can be seen in particular in <FIG>, a hole extending up to a face of the frame <NUM>. In the case illustrated, the face reached by the hole is the face which is substantially perpendicular to the rotation pin of the self-locking element <NUM>, meaning the face on plane ZY, however it is clear that the invention is not limited to this configuration and the frame <NUM> can be provided with one or more holes, in such a way as to place the seat <NUM> in communication with the volume outside the frame <NUM>.

The hole makes it possible to insert a release tool which, acting on one or more self-locking elements <NUM>, can bring them from the locked position to the free position. In some embodiments, the hole <NUM> extends from the free position to the locked position of the self-locking element, at least up to and preferably past the locked position. In this way, once the self-locking element <NUM> has reached the locked position it is possible to insert a tool, for example a screwdriver, in the hole, between its end and the position of the self-locking element, thus moving the self-locking element in the release direction.

In addition or as an alternative to the above, in particular in the case where the hole extends only up to the locked position of the self-locking element <NUM>, it is possible to provide a self-locking element <NUM> having a hole in its direction of rotation, in other words, along its direction of longitudinal extension, in such a way as to insert a tool through the hole in the frame <NUM> and the hole in the self-locking element <NUM>, thus allowing the movement of the latter through the tool. The self-locking support <NUM> of <FIG> differs from the self-locking support <NUM> of <FIG> due to the use of an elastic moving element <NUM> that works through compression instead of through traction. This advantageously makes it possible to apply different forces to the various self-locking elements <NUM>.

The self-locking support <NUM> illustrated in <FIG> differs from that illustrated in <FIG> in that the first moving element <NUM> is an element which can be inserted from the outside of the frame <NUM>, preferably rigid.

This configuration advantageously makes it possible to control the force acting on the self-locking element <NUM> and/or to control its position along the seat <NUM>.

In particular, in the embodiment illustrated, this makes it also possible to make the self-locking support <NUM> work even in the presence of the upper self-locking elements only, see <FIG>, which on the other hand may not be easily arranged in the locked position in other configurations, if the force supplied by the moving element is not sufficient. This problem could be solved by using a moving element which continuously applies enough force to obtain the locking action, for example by using an elastic moving element. However, this embodiment would make it difficult to arrange the self-locking support <NUM> in the desired position on the post <NUM>. On the contrary, with a moving element <NUM> that can be inserted from the outside through a suitable hole made in the frame <NUM>, it is possible to arrange the self-locking support in the desired position and then act on the self-locking element <NUM>, causing the locking of the self-locking support <NUM>.

In addition, or as an alternative to the above, in the presence of the first and of the third self-locking element <NUM>, meaning the lower ones in <FIG>, it is possible to facilitate the insertion of the self-locking support <NUM> in the post <NUM>. In particular, as is evident from the figures, in the absence of other forces the lower self-locking elements will tend to assume the free position, guaranteeing that the self-locking support <NUM> can be easily inserted in the post, due to the absence of any interaction between the self-locking elements <NUM> and the post <NUM>. This absence of interaction, instead, is more complex to obtain in the case of an elastic moving element which acts continuously on the self-locking elements <NUM>, pushing them towards the locked position.

The self-locking support <NUM> illustrated in <FIG> differs from the one illustrated in <FIG> in that the first moving element <NUM> is an element which can be rotated from the outside of the frame <NUM>.

More specifically, the moving element extends at least from the seat <NUM> of the self-locking element <NUM> to the outside of the frame <NUM>, in such a way that it can be accessed from the outside of the frame <NUM>. In a manner similar to that already described with reference to the embodiment shown in <FIG>, this configuration makes it possible to act on the self-locking element <NUM> controlling the position of the moving element <NUM> from the outside.

While in the embodiment of <FIG> the moving element <NUM> is inserted in the frame in a direction that is substantially aligned with the direction of movement of the self-locking element <NUM> in the seat <NUM>, in such a way as to push the self-locking element in the desired direction through a translation of the moving element <NUM>, in <FIG> the moving element <NUM> is inserted in the frame in a direction which is substantially perpendicular to the direction of movement of the self-locking element <NUM> in the seat <NUM>. In view of the above, in <FIG> the movement of the moving element <NUM> is substantially linear, while in <FIG> the movement of the moving element <NUM> is substantially of the rotary type. More specifically, to convert a rotation of the moving element <NUM>, the latter is provided with a cam <NUM> configured to act on the self-locking element <NUM>. The cam <NUM> is preferably connected to a pin <NUM> extending in the axial direction of rotation of the moving element <NUM>, in such a way as to control the rotation of the cam <NUM>, preferably up to the outside of the frame <NUM>. In some embodiments, it is possible to connect the cam <NUM> and/or the pin <NUM> to a lock, wherein the rotation of the lock causes a rotation of the cam <NUM>. In this way the self-locking support can be moved from the free position to the locked position only by a user in possession of the lock keys, which makes the configuration of the shelving unit even safer.

The self-locking support <NUM> illustrated in <FIG> differs from that illustrated in <FIG> in that the first moving element <NUM> comprises an eccentric <NUM> configured to act on the first self-locking element <NUM>.

More specifically, the eccentric <NUM> is mounted on a pin <NUM> on which the eccentric rotates from a free position to a locked position of the self-locking support <NUM>. The pin <NUM> preferably has a larger diameter compared to the eccentric <NUM>. The pin <NUM> can extend directly outside the frame in such a way as to allow the self-locking support <NUM> to be controlled. In some embodiments, as illustrated in <FIG>, the pin <NUM> can in turn be connected to a pin <NUM> whose diameter is smaller than that of the pin <NUM>. This solution advantageously makes it possible to exploit the difference between the diameters of the pins <NUM> and <NUM> to maintain the pin <NUM> within the frame and thus avoid a movement perpendicular to the rotation pin of the same. Furthermore, this embodiment advantageously makes it possible to reduce the visual impact on the external surface of the self-locking support <NUM>.

The self-locking support <NUM> illustrated in <FIG> differs from the one shown in <FIG> in that the post <NUM> is provided with grooves <NUM> on three sides instead of on two sides. As already explained, the number of grooves can be any. By way of example, even the post <NUM> can be carried out as shown in <FIG>. Clearly, in this as well as in other embodiments the shape of the post is not necessarily with a substantially square cross section, but it can have any shape, in combination with a respective shape of the self-locking support, such as to allow the self-locking support to be applied to the post and locked on the same owing to the action of the self-locking element.

Furthermore, the self-locking support <NUM> has a total of six self-locking elements <NUM>. In addition to the already described first, second, third and fourth self-locking elements, the presence of a further pair of self-locking elements, the fifth and the sixth, which are operatively similar to the first and the second, and/or to the third and the fourth, makes it possible to guarantee an even firmer grip of the self-locking support <NUM> on the post <NUM>.

The fifth and the sixth self-locking elements <NUM> are positioned on one side <NUM> of the frame <NUM> which is substantially perpendicular to the sides <NUM>, containing the first and the second self-locking elements <NUM>, and <NUM>, containing the third and the fourth self-locking elements <NUM>. Thanks to this configuration it is possible to maintain the advantageous U shape already described above, while increasing the grip on the post <NUM>.

The self-locking support <NUM> illustrated in <FIG> differs from that shown in <FIG> in that the post <NUM> is provided with grooves <NUM> on four sides instead of on two sides. As already explained, the number of grooves can be any. Furthermore, the self-locking support <NUM> has a total of four self-locking elements <NUM> corresponding to the already described first, second, fifth and sixth self-locking elements. This advantageously makes it possible to obtain an L-configuration of the self-locking support <NUM>. This configuration reduces the overall dimensions, weight, size and cost of the self-locking support <NUM>. The grip on the post <NUM> is guaranteed in any way, especially thanks to the configuration of the self-locking element <NUM>, with the area inserted in the groove <NUM> preventing the self-locking support <NUM> from coming off the post <NUM> once it has been arranged in the locked configuration. Clearly, the movement of the one or more self-locking elements guarantees in itself the grip on the post. The presence of the grooves is therefore optional, in all the embodiments. The grooves improve the grip on the post, preventing any movement along the plane ZX.

<FIG> differs from <FIG> in that it shows a post <NUM> with a substantially circular cross section. As already explained, the post <NUM> can have any cross section. The figure clearly shows how, to ensure the stability of the self-locking support <NUM>, it is sufficient that at least two sides of the post be positioned in proximity to the sides of the frame <NUM>, in such a way as to allow the one or more self-locking elements <NUM> projecting from the frame to come in contact with the surface of the post.

In other words, it is sufficient for the post to have two surfaces at a predetermined distance, wherein the predetermined distance is included between a first and a second distance. The first and the second distance are respectively measured with the one or more self-locking elements in the free position and in the locked position. The first and the second distance can be measured between a self-locking element and a side of the frame <NUM> intended to come in contact with the post, for example between the first self-locking element <NUM> and the side <NUM>, specifically its surface inside the frame <NUM>. Alternatively, or in addition to the above, the first and the second distance can be measured between a self-locking element and another self-locking element acting on the post in the opposite direction, for example between the first self-locking element <NUM> and the third self-locking element <NUM>.

The self-locking support <NUM> illustrated in <FIG> differs from the one illustrated in <FIG> in that the post <NUM> has a substantially U-shaped cross section, preferably with grooves <NUM> on the inner sides of the U, preferably on the two parallel sides of the U. As already explained, and as appears more clearly from the following description, the grooves <NUM> do not need to be present and the self-locking support <NUM> may be used even without the grooves <NUM>, if necessary using a self-locking element in a suitable shape.

The self-locking support <NUM> operates in a way that is similar to the operating mode of the self-locking support <NUM>. More specifically, the self-locking support <NUM> comprises an eccentric <NUM> mounted on a pin <NUM> which is connected to a pin <NUM> whose diameter is smaller than that of the pin <NUM>. Furthermore, in the self-locking support <NUM>, the pin <NUM> extends outside the frame <NUM>, preferably along a plane which is parallel to the longitudinal extension axis of the post <NUM> and in the direction corresponding to the open side of the U shape of the post <NUM>.

This configuration allows the self-locking support <NUM> to be at least partially inserted in the U shape of the post <NUM>, which can be advantageous for appearance-related reasons and/or for reasons related to the compactness of the structure. Furthermore, the extension of the pin <NUM> makes it possible to activate the moving element <NUM> in a simple manner outside the frame <NUM>. In some embodiments, like the one illustrated, the pin <NUM> can furthermore be provided with a hole <NUM> that allows the user to easily rotate the moving element <NUM>, for example by inserting a finger.

It will be clear to the expert in the art that with this configuration the moving element <NUM> can work both as a release element, for example through an anticlockwise rotation in the embodiment illustrated herein, and as a locking element, or at least as an element suited to make the self-locking element <NUM> move towards the locked position, for example through a clockwise rotation in the embodiment illustrated. This dual operation of the moving element <NUM> is obtained especially thanks to the relative size of the moving element <NUM> and the self-locking element <NUM>, more specifically by selecting a diameter of the pin <NUM> and a size and a position of the eccentric <NUM> which allow the latter, through a suitable rotation of the moving element <NUM>, to pass outside the self-locking element <NUM> in such a way as to move above or below it. In the configuration illustrated, this result can be obtained, for example, by ensuring that the distance between the eccentric <NUM> and the rotation centre of the pin <NUM> exceeds the longitudinal extension distance of the self-locking element <NUM> past the rotation centre of the pin <NUM> in the positive direction X, meaning in the direction from the area where the self-locking element <NUM> acts on the post <NUM> towards the rotation centre of the pin <NUM>.

<FIG> shows a possible alternative to the self-locking support <NUM> in the form of the self-locking support <NUM>. The latter comprises, specifically, a further moving element <NUM> in a magnetic or ferromagnetic material. This moving element <NUM> can act on the self-locking element <NUM>, 11220A, 11220B, 11220C, provided that the latter is made with a corresponding magnetic or ferromagnetic material. In other words, it is possible to generate a magnetic attraction or repulsion force between the moving element <NUM> and the self-locking element <NUM>, in such a way as to move the self-locking element <NUM> towards the locked position.

In the embodiment illustrated, the moving element <NUM> acts in a repulsive manner on the self-locking element <NUM>. It is clear, however, that the invention can be implemented in a different manner. For example, the moving element <NUM> can be carried out together with the eccentric <NUM>, thus producing an attraction effect on the self-locking element <NUM>.

Clearly, the moving element <NUM> and its magnetic attraction or repulsion effect on the self-locking element <NUM> can be obtained in any of the embodiments already described and not exclusively in the self-locking support <NUM>.

<FIG> shows a series of possible configurations of the self-locking element <NUM>.

The embodiment 11220A has a substantially elongated shape with a pin <NUM> having a first predetermined radius and a pin <NUM> having a second predetermined radius which is longer than the first predetermined radius. The self-locking element 11220A furthermore comprises one or more bearings <NUM>, preferably mounted on the pin <NUM>. The bearings allow the self-locking element 11220A to slide in the seat <NUM> and/or a force to be applied to the self-locking element 11220A through one of the moving elements previously described. By way of example, it is possible to mount an elastic band on the outer part of the bearing <NUM>, thus obtaining a configuration similar to that of the self-locking support <NUM> of <FIG>.

The self-locking element 11220B substantially corresponds to the self-locking element 11220A, with the presence of two bearings <NUM> on the two parts of the pin <NUM> extending from the two sides of the pin <NUM>. This configuration advantageously allows the self-locking element <NUM> to slide in the seat <NUM> in a uniform manner.

The self-locking element 11220C has the shape of a substantially elongated pin <NUM>, with part of the pin <NUM> provided with a recess <NUM>. Preferably, the recess <NUM> has a shape that is substantially complementary to a surface of the post, in this case the post 11100C, on which the self-locking element 11220C acts. In the embodiment illustrated in <FIG>, the post 11100C has a substantially circular cross section, so that the recess <NUM> has a curvature whose radius is substantially similar to the curvature radius of the post 11100C. The invention, however, is not limited to the embodiment in which the recess has a curved shape. Alternatively, as can be seen in <FIG>, the self-locking element 11220D can have a shape complementary to that of the self-locking element 11220A, meaning a substantially elongated shape with a pin <NUM> having a first predetermined radius and a pin <NUM> having a second predetermined radius, smaller than the first predetermined radius and corresponding to the recess <NUM>. The recess <NUM> has a shape substantially corresponding to, or partially smaller than the groove <NUM> along the direction X, wherein in this case the groove is not recessed in the tube, like in the embodiments previously described, but projects from the same. Clearly, the recess and/or the projection can be used both internally and externally.

Even if both the self-locking elements 11220C and 11220D are illustrated as provided with bearings <NUM>, it is clear that they can be carried out even without the bearings <NUM>.

The self-locking element 11220E has a substantially spherical shape.

Each of the self-locking elements described above may comprise or be made of a magnetic material, analogously to what has already been described above with reference to the operation of the embodiment of <FIG>. In some embodiments one or more of the bearings described above may be a magnet and/or a bearing comprising a magnetic and/or ferromagnetic material.

<FIG> shows a schematic view of a shelving unit <NUM> comprising four posts <NUM>, each suited to be replaced, if necessary, by any of the posts <NUM>, <NUM>, <NUM>, 11100C, 11100D, and one shelf. It is clear that both the number of posts and the number of shelves can be selected as desired and according to the expected shape and configuration of the shelving unit <NUM>. As can be seen in the figure, each shelf can be placed in a desired position along the post in a simple, safe and effective manner, conveniently using a self-locking support <NUM> which can be alternatively constituted by any of the self-locking supports described above.

As can be seen in the figure, in this case the longitudinal extension axis of the post <NUM> is axis Y, meaning the vertical axis, and the seat <NUM> has at least one surface at an angle with respect to said axis, which causes the already described movement of the self-locking element from the free position to the locked position.

However, it is clear that, as already described above, one or more posts <NUM> can additionally or alternatively be positioned along an axis different from the vertical axis, for example the horizontal axis and/or any other axis. In this case, in addition to being used as a support for shelves, the self-locking element <NUM> can also be used as a connection element between one or more posts <NUM>. More specifically, if an external surface of the frame is shaped in such a way that it can be connected to a post <NUM> instead of to a shelf, the self-locking element <NUM> can be moved along a first post <NUM> until reaching the desired crossing point with a second post <NUM>, maintained in position by the external surface of the frame shaped exactly for this purpose and according to the shape of the post <NUM>.

The self-locking support <NUM> illustrated in <FIG> is based on the one illustrated in <FIG> and differs from it in that the post <NUM>, if required, can be provided with just one groove <NUM> on one side only of the internal U shape. It is clear, however, that the post <NUM> can be provided with a larger number of grooves <NUM>.

The operating mode of the self-locking support <NUM> is similar to that of the self-locking support <NUM>. More specifically, the self-locking support <NUM> comprises a moving element <NUM> which acts on the self-locking element <NUM>. By configuring the seat <NUM> in such a way as to move the self-locking element <NUM> in an external direction with respect to the frame <NUM>, it is possible to allow the moving element <NUM> to bring the self-locking element <NUM> in the locked position against the groove <NUM>, thus locking the self-locking support <NUM>. Clearly, the self-locking element <NUM> can also rest against the internal surface of the post <NUM> on the side where there is no groove <NUM>, and therefore the post can be made without any groove.

In the embodiment illustrated, the self-locking element <NUM> is schematically shown as a cylinder with constant radius. It is clear, however, that any of the self-locking elements previously described can be implemented.

Any of the configurations described above can be used to release the self-locking element <NUM>. In the embodiment illustrated, the self-locking element <NUM> has a hole <NUM> in its central area, preferably at the level of its rotation pin. The hole <NUM> can be accessed from the side of the frame <NUM>, as can be seen in <FIG>. By inserting in the hole <NUM> an elongated tool whose size is equal to or smaller than that of the hole itself, it is thus possible to move the self-locking element <NUM> to its released and/or locked position, analogously to what has been described above. It is clear that this further release mode can be used with any of the self-locking supports already described above. In some cases, the hole can be threaded, thus allowing a firmer connection with the special elongated tool, the latter being provided with a compatible thread. This makes it possible to securely connect the tool to the self-locking element <NUM>, thus placing it in the desired position in total safety.

<FIG> shows various schematic side and top views of a self-locking support <NUM>, in a position close to the locked position.

The self-locking support <NUM> illustrated in <FIG> is based on the one illustrated in <FIG> and differs from it in that there are two self-locking elements <NUM> and two respective moving elements <NUM>. The two moving elements <NUM> act in substantially opposite directions. Thanks to this configuration, it is advantageously possible to lock the self-locking element in both sliding directions within the post. In preferred embodiments each of the two moving elements may comprise a spring, as schematically illustrated, for example, in <FIG>. Alternatively, a single spring can constitute both the moving elements <NUM>.

The self-locking support <NUM>, furthermore, differs due to the presence of one or more alignment structures <NUM>. In general, the alignment structure <NUM> is a projection of the seat <NUM> whose shape is complementary to a respective recess in the post, or the contrary, meaning a recess in the seat <NUM> whose shape is complementary to a respective projection of the post. In this way, it is possible to facilitate the sliding movement of the frame <NUM> along the post, in a parallel manner, and keeping the self-locking support <NUM> in a known relative position with respect to the post, in such a way as to allow the self-locking element <NUM> to act on a desired portion of the post. Thanks to this configuration, it is advantageously possible to provide a post without specific grooves <NUM> for the insertion of the self-locking element <NUM>.

<FIG> shows a schematic top view of a post <NUM>. The post <NUM> can be made, for example, with an aluminium section bar. The post <NUM> can be provided with more than one insertion seat <NUM> for the self-locking support <NUM>. In the case illustrated herein there are three different insertion seats <NUM>. Preferably, the different insertion seats <NUM> have different alignments and/or are present on different sides of the post <NUM>, in such a way as to allow the insertion of the self-locking support <NUM> on different sides and/or with different alignments.

Each insertion seat <NUM> can be provided with one or more alignment structures <NUM>, in such a way as to allow interaction with the corresponding alignment structure <NUM> of the self-locking support <NUM>. In the embodiment illustrated, each insertion seat <NUM> comprises two alignment structures <NUM> which are symmetrical with respect to a linear axis positioned between the two alignment structures <NUM>, in proximity to the central area of the insertion seat <NUM>. In this manner, the self-locking support <NUM> can be inserted with two possible orientations.

It is also evident that this embodiment, like other embodiments described above, advantageously makes it possible to mount the self-locking support on the post frontally, inserting it in the special insertion seat <NUM>, if necessary moving the self-locking element <NUM> to the free position during the insertion stage. This allows the self-locking support to be inserted at any moment, even when the shelving unit has already been partially assembled.

<FIG> shows a schematic top view of the post <NUM> with a self-locking support <NUM> inserted therein. In some embodiments, the width of the alignment structure <NUM> in direction X is preferably smaller than the width of the self-locking element <NUM>, so that, as can be seen, the self-locking element <NUM> can interact with the surface of the insertion seat <NUM> even in the presence of a cavity which constitutes the alignment structure <NUM>. More specifically, this makes it possible to have the alignment structure on both the inner sides of the guide for the self-locking support, sides on which also the self-locking element <NUM> can act without, however, preventing the interaction between the self-locking element <NUM> and the surface of the post due to the cavity constituting the alignment structure <NUM>.

<FIG> shows a schematic perspective view of a self-locking support <NUM> in an intermediate position between the locked and the free position.

In this case, the self-locking support <NUM> for a shelving unit does not serve only for mounting a shelf on a post but also for connecting two posts together. This is made possible by the presence of two self-locking elements <NUM> which can interact with two different posts. In the embodiment illustrated, the two self-locking elements <NUM> move in different directions, substantially at <NUM>° with respect to each other. Clearly, the invention is not limited to this embodiment. In alternative embodiments, it is also possible to use the self-locking support to connect one foot of the shelving unit to one post of the same.

<FIG> shows different schematic side views of a self-locking support <NUM> in an intermediate position between the locked and the free position.

In this embodiment, the frame <NUM> comprises a first portion <NUM> and a second portion <NUM> which are connected by a joint <NUM>. Each portion <NUM>, <NUM> comprises at least one self-locking element <NUM>. Thanks to the joint <NUM>, for example a joint of the rotary type comprising a rotation pin on which the ends of the portions <NUM>, <NUM> are mounted in a rotatable manner, it is possible to rotate the portions <NUM>, <NUM> with respect to each other. In some embodiments, the joint <NUM> may be provided with locking means (not illustrated) configured to lock the joint <NUM> in a desired position in a known manner.

It is clear that, in this way, it is possible to use the self-locking support <NUM> in different configurations in a very flexible manner, thus ensuring flexibility when mounting different posts of the shelving unit together, or flexibility when mounting one or more shelves on the shelving unit.

<FIG> shows a schematic perspective exploded view of a self-locking support <NUM>. <FIG> shows schematic side and sectional views of the self-locking support <NUM>. More specifically, the view at the extreme right of Figure 18B is a sectional view taken along line A-A of the central view shown in Figure 18B.

In this embodiment the frame <NUM> comprises a first self-locking element <NUM> moved by the respective moving element <NUM>, analogously to what has already been described above. In this specific case, the self-locking element <NUM> has a substantially cylindrical shape while the moving element <NUM> is substantially a spring constituted by a metal tab hinged at one of its ends. It is clear, however, that any of the self-locking elements and any of the moving elements previously described can be alternatively provided.

The embodiment illustrated in <FIG> differs from the previous ones owing on the one hand to the presence of a circular seat <NUM> in the frame <NUM>, inside which there is a rotary self-locking part <NUM>, and on the other hand to the shape of the end of the frame <NUM> opposite the end of the frame <NUM> comprising the circular seat <NUM>. Clearly, although both these characteristics are represented together, it is possible to carry out the invention even with just one of them.

Regarding the first characteristic, meaning the circular seat <NUM>, this has generally a circular shape which allow a rotary self-locking part <NUM> to be inserted therein and rotated after being inserted. The rotary self-locking part <NUM> has a substantially circular cross section, too, in such a way as to allow it to rotate in the seat. The rotary self-locking part <NUM> comprises a self-locking element <NUM> and a moving element <NUM> similar to those already described. Thanks to this configuration, it is possible to rotate the rotary self-locking part <NUM> with respect to the frame <NUM>. This may make it advantageously possible to rotate the elements connected to the rotary self-locking part <NUM>, which will be connected to them in the manner described above, thanks to the interaction between the self-locking element <NUM> and a respective seat. It is clear that said rotation can be free and/or lockable in a determined position in a known manner, through one or more elements, not illustrated herein, suited to brake the rotation, for example an element suited to generate friction between the circular seat <NUM> and the rotary self-locking part <NUM>.

Regarding the second characteristic, meaning the shape of the end of the frame <NUM> opposite the end of the frame <NUM> comprising the circular seat <NUM>, it can be observed in the figures that this has a substantially circular cross section, too, preferably with external dimensions equal to those of the circular seat <NUM> and/or of the rotary self-locking part <NUM>.

Thanks to this configuration, the end of the frame <NUM>, which also has a substantially circular external shape, can, if required, rotate inside the seat through which it is inserted in the post, in such a way as to position the frame <NUM> at a desired angle with respect to the post.

Furthermore, this embodiment advantageously makes it possible to use the self-locking support <NUM> with a post which is not necessarily linear but can have one or more curved sections, thanks to the rotation of the self-locking support <NUM> with respect to its seat in the post, wherein said rotation is allowed by the rotary self-locking part <NUM> and/or by the substantially circular shape of the end of the frame <NUM> opposite the end of the frame <NUM> comprising the rotary self-locking part <NUM>. This is schematically illustrated in <FIG>, with the post <NUM>. More specifically, <FIG> shows on the left a side view of the curved post <NUM> with the self-locking support <NUM> inserted therein. On the right there is a sectional view taken along line A-A'.

<FIG> shows different schematic top views of a self-locking support <NUM> and of parts of the same.

In this embodiment, the self-locking element <NUM> comprises two substantially cone-shaped or truncated cone-shaped ends <NUM>, <NUM>, as illustrated, if necessary connected to a central body <NUM> with a substantially circular cross section. Preferably, the tube <NUM> has a groove whose shape is substantially complementary to that of the self-locking element <NUM>. In this manner, thanks to the cone-shaped and/or truncated cone-shaped ends <NUM>, <NUM> it is possible to avoid the presence of a residual movement between the self-locking support <NUM> and the tube <NUM> when the self-locking support <NUM> is in its locked position.

More specifically, this can be obtained by making the groove in such a size that when the self-locking element <NUM> is inserted both the ends <NUM>, <NUM> rest against the groove before the central part <NUM> of the self-locking element <NUM> between the two ends <NUM>, <NUM> rests against the groove. In other words, thanks to this configuration, in the locked position shown in <FIG> there is a space between the central part <NUM> of the self-locking element <NUM> between the two cone-shaped or truncated cone-shaped ends <NUM>, <NUM> and the groove in the tube <NUM>, indicated by S in the figure. This configuration can be implemented, for example, by making a groove in which the size, in direction X, of the area corresponding to the central part <NUM> is smaller than the size, in direction X, of the central part <NUM>.

Claim 1:
Self-locking support (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>) for a shelving unit (<NUM>), the shelving unit (<NUM>) comprising at least one post (<NUM>, <NUM>, <NUM>, <NUM>, 11100C, 11100D, <NUM>, <NUM>) for mounting the self-locking support (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>), the self-locking support (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>) comprising:
a frame (<NUM>, <NUM>, <NUM>, <NUM>),
a first self-locking element (<NUM>, 11220A, 11220B, 11220C, <NUM>, <NUM>), a first moving element (<NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>, <NUM>) associated with the first self-locking element (<NUM>, 11220A, 11220B, 11220C, <NUM>, <NUM>),
wherein the frame (<NUM>, <NUM>, <NUM>, <NUM>) comprises a first seat (<NUM>) for the first self-locking element (<NUM>, 11220A, 11220B, 11220C, <NUM>, <NUM>),
wherein the first seat (<NUM>) is configured so as to allow the movement of the first self-locking element (<NUM>, 11220A, 11220B, 11220C, <NUM>, <NUM>) from a free position to a locked position under the action of the first moving element (<NUM>, <NUM>, <NUM>),
wherein the first seat (<NUM>) has at least one surface at an angle with respect to the longitudinal extension of the post (<NUM>, <NUM>, <NUM>, <NUM>, 11100C, 11100D, <NUM>, <NUM>),
characterized in that
a contact between the post and the first self-locking element, moving the self-locking support downwards, results in a movement of the self-locking support from a free position to a locked position.