IT201900009900A1 - MODULAR TROLLEY FOR SLIDING FRAMES - Google Patents

Description

Description of the invention having as title:

"MODULAR TROLLEY FOR SLIDING FRAMES"

FIELD OF APPLICATION

The present invention relates to a trolley for sliding doors and windows, generally usable to allow easy sliding of doors or windows on support frames even in the presence of linearity or flatness defects of the latter or of the compartments in which the latter are mounted.

STATE OF THE TECHNIQUE

Sliding doors and windows have been known for some time, both windows and doors, which have at least one sliding section on a guide which is fixed on the base side of the frame which supports the door or window.

This type of door or window is generally mounted in buildings when the spaces required for the usual opening and closing maneuvers of the doors of hinged windows and doors are very small or insufficient.

Even particular forms of interior furnishing of living rooms prefer the assembly of sliding doors instead of those with hinged doors.

Typically, these types of doors and windows require a high smoothness of the mobile leaf, which can also be very heavy, in order to make opening and closing maneuvers easier for users.

For this reason, the doors destined to slide along the base guide are equipped in the lower area with groups of wheels or retarders which are idle revolving and which couple with the aforementioned guides, sliding inside them, supporting the entire weight of the door to which they are applied. Normally, the wheels are assembled to form a group in which a small frame that keeps them in line, arranged along a common alignment line, with rotation axes parallel to each other and transversal to the alignment line, which is parallel to the guide in which the wheels run. In embodiments, the wheels are rotatably supported by a pair of brackets, each pivoted to the aforementioned frame in an intermediate position between the wheels so as to allow a certain oscillation.

A lower part of the wheels is kept protruding with respect to the small frame that groups them, in such a way as to be able to rest on the sliding surfaces of the guides without interference or contacts between the small frame and the guides that would hinder the free sliding of the window or door. of a section of this.

In these systems known in the art, if there are defects in planarity or linearity of the sliding surfaces, the wheels can adapt to the surfaces, so as to rest on them, thanks to the degree of freedom that allows them to oscillate.

Overall, the small frames and wheels are pre-assembled to allow quick assembly and therefore constitute a block which is fixed in a known way, for example with screws, to the base of the sliding door of the window and which, in addition to making it sliding, as mentioned, supports its own weight, divided between the total number of wheels.

This state of the art has some drawbacks.

A drawback of the support devices for sliding doors and windows known in the art is that the wheels are arranged in pairs, connected to each other by means of a rocker arm to which they are constrained to distribute the load equally on the two wheels, therefore each trolley can have at most two wheels.

Another drawback, caused specifically by the fact that since only two wheels are provided for each trolley, for very heavy doors it is necessary to increase the diameter of the wheels themselves, increasing the overall dimensions of the trolley and consequently increasing the dimensions of the profile that contains them.

There is therefore a need to improve a trolley for sliding doors and windows which can overcome at least one of the drawbacks of the art.

An object of the present invention is to provide a modular trolley for sliding doors and windows which allows the weight of the door to be distributed on a plurality of wheels, the latter being a number compatible with the weight of the door itself, which is divided according to the capacity of each wheel.

It is also an aim of the present invention to reduce the height of the modular trolley thanks to the use of smaller wheels, which is also suitable for mounting on windows with minimal profiles.

Another object of the present invention is to provide a modular trolley for sliding windows which allows to automatically compensate for any irregularities in the surface on which they slide.

A further object of the present invention is to provide a modular trolley for sliding doors and windows which allows individual components to be replaced quickly and easily.

Yet another object of the present invention is to provide a modular trolley for sliding doors and windows that are easy to assemble and adjust, during a calibration step which is usually carried out with the door closed, at the same time as the installation of the door or window.

In order to obviate the drawbacks of the known art and to obtain these and further objects and advantages, the Applicant has studied, tested and implemented the present invention.

EXPOSURE OF THE FOUND

The present invention is expressed and characterized in the independent claim.

The dependent claims disclose other features of the present invention or variants of the main solution idea.

In accordance with the aforementioned purposes, a modular trolley for doors and windows is provided comprising at least one movable leaf, which is slidable with respect to a support frame along a sliding direction and comprises a base side to which said trolley is intended to be fixed. modular. The modular trolley comprises a containment element associated with the aforementioned base side and a plurality of sliding members which are associated with the containment element and configured to slide along a sliding guide, which extends parallel to the sliding direction and is fixed to a base side of the support frame.

According to a characteristic aspect of the present invention, the modular trolley comprises a plurality of support elements, arranged in succession along the sliding direction, movable independently from each other, and each configured to support at least one sliding member. The support elements are constrained to the containment element so as to have two degrees of freedom of movement with respect to the containment element itself, configured as two linear translation movements parallel respectively to the sliding direction and to a vertical direction, perpendicular to the sliding direction, to ensure contact between the sliding members and the sliding guide.

According to embodiments provided herein, the modular trolley comprises a plurality of support elements. In a preferred embodiment, the support elements and the support elements are wedge-shaped.

According to embodiments provided herein, the support elements and support elements are arranged in an inverted configuration with respect to each other so that a base of greater extension of a group of wedge-shaped elements selected from the support elements and the supporting elements, for example all the supporting elements, faces an upper face of the trolley, while a base of greater extension of the other group of wedge-shaped elements chosen between the supporting elements and the supporting elements, for example for example all the support elements, is facing the sliding guide.

According to embodiments envisaged here, the modular trolley comprises adjustment means by means of which it is possible to modify the pitch (δ), or interdistance, between the sliding members, approaching or moving them away from each other according to a direction parallel to the sliding direction.

In preferred embodiments, the adjustment means comprise a mobile terminal element, located near a lateral end of the trolley, opposite to another end in which another terminal element, fixed is located; in which the aforesaid mobile terminal element is slidably received in the carriage, so as to be movable parallel to the sliding direction, and comprises an inclined face and mating to an inclined face of one of the supporting elements or of one of the supporting element arranged adjacent to the second terminal element so that said inclined faces remain in sliding contact against each other. In accordance with embodiments provided herein, the aforementioned adjustment means comprise a threaded pin which can be screwed on / unscrewed with respect to its own supporting member and configured to contact the mobile terminal element so as to respectively reduce / increase the aforementioned pitch (δ) alternatively by approaching the mobile terminal element to the fixed terminal element during screwing and, vice versa, moving it away from the latter during unscrewing.

According to another aspect of the present invention, a sliding door or window is provided, for example a window or a French window or a door, comprising at least one movable leaf which is sliding along the sliding direction with respect to a respective base side of a support frame on which a sliding guide is fixed. The movable door is in turn provided with a base side to which at least two modular trolleys according to the present invention are fixed, near its opposite ends.

Advantageously, the modular trolley and the window frame according to the present invention allow an automatic self-adjustment which ensures that all the sliding members, for example configured as idle wheels, always maintain a localized contact with the sliding guide.

This advantageously ensures that the weight force of the mobile leaf is unloaded in a homogeneous way on all the sliding members, so as to avoid that some are damaged or worn more quickly than others, and at the same time guarantee an easy sliding of the mobile leaf. .

This is achieved thanks to the fact that the support elements that hold the sliding members are movable independently from each other according to two degrees of freedom of movement, in particular with linear translation movements along the sliding direction and a perpendicular direction. (vertical) to it, which allows each modular unit formed by the support element and the relative sliding member to adapt to the course of the underlying sliding guide. In particular, during the sliding of the mobile leaf, each support element of the sliding members, which is therefore movable with respect to the carriage and with respect to the other support elements, moves slightly, according to the two aforementioned directions, for example to lower or raise. , so that the sliding member supported by it is always in point-by-point contact with the sliding guide.

Furthermore, thanks to the presence of the inclined walls of which the support elements and the support elements are provided, they are kept in sliding contact against each other, which guarantees an equal distribution of the forces, which are then discharged in equal amounts. on all sliding parts.

On the contrary, in the solutions known in the art, if the compartments obtained in the walls in which the doors and windows are mounted, or the sliding guides placed on the frames, are not perfectly planar, for example because they are inclined or have ridges and depressions, the sliding of the The mobile leaf becomes very difficult because the wheels do not follow linear trajectories and consequently some of them can remain raised with respect to the guide, and are therefore inactive, causing an increase in the load on the wheels in contact with the guide, which therefore wear out prematurely because they must withstand a greater load than expected in the design phase.

ILLUSTRATION OF DRAWINGS

These and other aspects, characteristics and advantages of the present invention will become clear from the following description of embodiments, provided by way of non-limiting example, with reference to the attached drawings in which:

- fig. 1 is a schematic front view of a window frame, in this case a window, equipped with two modular carriages for sliding windows according to the present invention, also schematically illustrated in this figure;

- figs. 2 and 2a-2d are longitudinal sectional views of the modular trolley for sliding windows according to the present invention illustrated in different conditions of use;

- figs. 3, 5 and 7 are seen as those of fig. 2 and 2-2d, in which examples of configurations that the modular trolley according to the present invention can assume in a calibration step are illustrated;

- figs. figures 4, 6 and 8 are cross-sectional views of the modular trolley according to the present invention, taken according to the respective section planes IV-VI-VIII, indicated respectively in figs. 3, 5 and 7;

- fig. 9 is a schematic and enlarged scale view of a portion of the modular trolley for sliding doors and windows of fig. 2, in a preferred embodiment;

- figs. 10 and 11 are enlarged schematic views of a portion of a modular trolley for sliding windows, according to variants of the version indicated in Figure 9.

To facilitate understanding, identical reference numbers have been used wherever possible to identify identical common elements in the figures.

It should be understood that elements and features of one embodiment can be conveniently incorporated into other embodiments without further specification.

DESCRIPTION OF EMBODIMENTS

Reference will now be made in detail to the various embodiments of the invention, of which one or more examples are illustrated in the attached figures.

Each example is provided by way of illustration of the invention and is not intended as a limitation thereof.

For example, the features illustrated or described as being part of an embodiment may be adopted on, or in association with, other embodiments to produce a further embodiment.

It is understood that the present invention will include these modifications and variations.

Before describing the embodiments, it is further clarified that the present description is not limited in its application to the construction and arrangement details of the components as described in the following description using the attached figures.

The present disclosure may provide other embodiments and be embodied or practiced in various other ways.

Furthermore, it is clarified that the phraseology and terminology used here is for descriptive purposes and should not be considered as limiting.

Embodiments described using the attached figures refer to a modular trolley for sliding windows, indicated below and in figures 1 to 11 briefly as trolley 1.

With particular reference to fig. 1, 2 denotes as a whole a window comprising two wings, one of which is fixed 2A and one that slides 2B in the double sliding direction indicated by the double arrow X. It is understood that in a variant embodiment, which is entirely equivalent for the purposes of the present invention , both the wings 2A, 2B can be movable in the sliding direction X, being both supported by the carriage 1, in the manner that will be described in more detail below.

The window 2 to which reference will be made purely by way of example in the following description, but which, as understood by the skilled person, could be another type of window or door, such as, for example, a door, comprises a perimeter frame 3, in the case specific rectangular shape, intended to be mounted in a recess of a wall (not visible).

The frame 3 has a base side 3A to which a linear guide 4 is fixed, the function of which is to guide the carriage 1 and the entire leaf 2B in a sliding manner. In the event that the door 2A is also sliding, two linear guides 4 will naturally be provided, arranged parallel to each other and suitably spaced, configured to allow each the sliding of a respective door.

According to embodiments provided herein, the guide 4 can also be made of "soft" materials, for example in materials other than metal with higher mechanical strength, in particular in plastic material, while maintaining the integrity of the guide 4, which does not it is damaged with use. This is because, as will be evident in the following, the carriage 1 according to the present invention allows to bear considerable weights in a distributed manner, for example given by the sum of the weight of the door frame and of the air chamber glass supported by it, on a large portion of the sliding guide.

The carriage 1 comprises a plurality of sliding members 5, bearing and configured to allow sliding with low friction of the door 2B. In particular, the sliding members 5 are intended to be associated with the base side 2C of the door 2B and intended to slide in the aforementioned guide 4.

In a preferred embodiment, two carriages 1 are associated with the base side 2C of the door 2B, arranged in particular substantially at the opposite ends - right and left - of the base side 2C, as shown in fig. 1.

In this embodiment, each carriage 1 can comprise a number of sliding members 5 such that the modular carriage extends for a maximum of half the length of the mobile leaf 2B, measured parallel to the sliding direction X.

According to embodiments provided herein, the sliding members 5 are supported by support means, which will be described in greater detail below.

All the sliding members 5 are supported independently, so as to be movable with respect to each other. Note that it is possible to identify an interdistance, or step, identified by "δ" in the attached figures, between the sliding members 5, this step being measured as the distance between the homologous points of two adjacent sliding members, in a direction parallel to the sliding direction X.

According to embodiments envisaged here, the carriage 1 comprises adjustment means 6 by means of which it is possible to modify the pitch "δ" between the sliding members 5.

The sliding members 5 are aligned one after the other along a direction parallel to the sliding direction X.

The sliding members 5 are movable, in use, according to the sliding direction X, and also according to a transversal direction, in the specific case perpendicular to the sliding direction X, that is, in the vertical direction, as will be explained in greater detail below.

The supporting means of the sliding members 5 can be configured as wedge-shaped elements 7 so as to define two opposite inclined faces 7A converging towards a first convergence point facing upwards. In other words, each support element 7 substantially has a trapezoidal shape, seen from the side in front elevation, as shown in the attached figures. Each element 7 supports at least one sliding member 5 intended to slide within the guide 4.

In a preferred embodiment, the sliding member is configured as a wheel, indicated by the reference number 8 in figs. 2-9 and 11. The wheel 8 is received in a seat obtained in the support element 7 and is fixed to the latter, according to methods known in the art, so as to be able to rotate, idle, around its own axis of rotation A. In the embodiments in which the sliding members 5 are configured as wheels 8, their support elements will hereinafter be referred to as "wheel support elements", indicated by the reference number 7.

In an alternative embodiment, the support elements 7 support support members 9 to distribute the weight of a fixed leaf, for a longer section of the sliding guide 4; the support members being schematically shown in fig. 10, where they are indicated by the reference number 9 ,.

In another embodiment, schematically illustrated in fig.

11, each wheel support element 7 can support a pair of wheels 8, arranged one after the other along the sliding direction X. In this case, the wheel support element is shaped as an elongated member, indicated by the number of reference 22 in the figure, provided with two seats each intended to receive and hold, in a rotatable way, a respective wheel 8. In this embodiment, the presence of the elongated element 22 guarantees a homogeneous distribution of the loads between the two wheels 8 to be it withheld.

The trolley 1 comprises a concave containing element 10, shaped for example in the shape of an inverted "V", as can be seen in the sections of figs. 4, 6 and 8, arranged so that the opening of the "V" faces the guide 4.

The containment element 10 is configured to contain the components of the trolley 1, namely in particular the sliding members 5, the support elements 7 and the support elements 11.

According to an embodiment provided herein, the containment element 10 defines an internal compartment intended to receive at least the sliding members 5, the relative support elements 7 and the supporting members 11. The internal compartment has a certain height H, measured parallel to the vertical direction Z, which is related to the type of sliding guide 4. Thanks to this, by changing the shape of the containment element 10, and therefore the dimensions of its internal compartment, it is possible to adapt the trolley 1 to any type sliding guide.

In use, the containment element 10 cooperates with the guide 4 to guide the sliding of the sliding members 5.

In a realized form, the containment element 10 is intended to be fixed to the base side 2C of the door 2B.

In an alternative embodiment, the containment element 10 is integrated into the base side 2C of the door 2B, which is suitably shaped to define an internal compartment intended to receive at least the sliding members 5, the relative support elements 7 and support bodies 11.

According to particular embodiments provided herein, the containment element 10 contacts the support elements 7, while the guide 4 is in contact with the wheels 8.

As shown in FIGS. 4, 6 and 8, the support elements 7 contact the containment element 10, at least in correspondence with two opposite side faces, facing outwards, that is, on the opposite side with respect to the wheels 8.

In a particular embodiment, the containment element 10 can comprise two end projections 19, which act as limit switches and prevent the disengagement of the support elements 7 from the containment element 10. It should be noted that, in this embodiment, the support elements 7 comprise two steps 20, each configured to engage with a respective projection 19, as shown in fig. 4.

The trolley 1 comprises a plurality of support elements, arranged alternately with the support elements 7 so that each support element 1 is interposed between, and in contact with, two consecutive support elements 7.

In a preferred embodiment, illustrated in the attached figures, the support elements 11 also have a wedge shape which defines two inclined faces 11A which converge towards a second convergence point facing downwards, i.e. on the opposite side with respect to the first point of convergence of the faces 7A so as to be wedged between two consecutive support elements 7. In other words, the inclined faces 11A of the support elements 11 have the same inclination as the inclined faces 7A of the support elements 7, being conjugated to them and against which they are kept in sliding contact. Each support element 11 has a base of greater extension which is facing upwards in the attached figures, in contact with an upper face 10A of the containment element 10.

At a lateral end of the containment element 10, on the left in the attached figures, a first terminal element 12 is fixed.

This first terminal element 12 has at one end facing the inside of the containment element 10 an inclined face 12A which, like the faces 11A, is parallel and held in sliding support against the opposite faces 7A of the support elements 7.

At the opposite lateral end of the containment element 10, ie the one on the right for the observer of the figures, the adjustment means 6 are mounted which include a second mobile terminal element 13.

This terminal element 13 also includes a face 13A inclined parallel to the face 7 A of the contiguous block 7 and which is kept in sliding contact with it.

Note that the terminal element 13 is accommodated in a sliding manner in the containment element 10 and is therefore movable along the sliding direction X, as opposed to the first terminal element 12, which is instead fixed.

The adjustment means 6 comprise a threaded pin 15 provided with an end 14 configured to remain in contact with a face 13B of the second terminal element 13, which is preferably vertical, and arranged on the opposite side with respect to the face 13 A. In one form embodiment, a support member 16 is provided, arranged between the guide 4 and the containment element 10, at the end of the carriage 1 opposite to that in which the first terminal element 12 is arranged. In other words, the organ support 16 is adjacent to the second terminal element 13.

The support member 16 includes a through hole, in particular threaded, intended to receive the aforementioned pin 15, which can be screwed and unscrewed with respect to the support member 16, which therefore supports and guides it in movement. Preferably, the pin 15 and the aforementioned through hole which receives it have a circular section and an axis of development parallel to the sliding direction X.

In one embodiment, the support member 16 is fixed to the containment element 10 by means of a pair of screws 21, better visible in fig. 6.

The pin 15 has a head 17 which includes a coupling profile with a known tool and not shown, for example an Allen key, and can be used to screw it into, or unscrew it from, the support member 16.

In the specific case, this coupling profile is made in the form of a recess 18 which has a polygonal female profile which is designed to receive and couple with a ferrule which has a male polygonal counter profile which can be conjugated with the female profile 18: the tool can be engaged when necessary in the recess 18 and, operated from the outside by an operator, rotates the pin 15, which, when screwed, pushes the second terminal element 13 to press all the support elements 7, and therefore the support elements 11 , which approach each other (fig. 7), or when unscrewed, causes the support elements 7, and therefore the support elements 11, to move away from each other (fig. 3).

As can be seen in Figures 3, 5 and 7 when the threaded pin 15 is screwed into the support member 16, the interdistances or pitch "δ" are progressively reduced, and the upper face 10A of the containment element 10 also rises progressively: this allows you to make adjustments in the vertical direction of the leaf 2B to compensate for any lowering or inclinations of the guide 4, or of the surface on which the guide is installed, so as to keep the base side 2C of the leaf 2B as horizontal as possible . In particular, in fig. 3 shows a configuration in which the pin 15 is completely unscrewed from the support member 16 (most of the pin 15 being extracted from the latter) and the height of the carriage 1, intended as a vertical dimension, is reduced to a minimum , while in fig. 7 shows a configuration in which the pin 15 is completely screwed into the support member 16, being all contained between the guide 4 and the containment element 10, and the height of the carriage 1 is maximum. Fig. 5 shows an intermediate configuration between the two described above, with the pin 15 partially screwed into the support member 16. In this case the carriage 1 has an intermediate height between the maximum and the minimum.

Thanks to the adjustment means 6 it is possible to keep the base side 2C horizontal even if the guide 4 is not horizontal.

With reference to the figure, the qualitative trend of the forces that are exchanged between the faces 7A and 11A is schematically indicated using the known rule of the parallelogram: in practice, the forces that exchange the opposite faces 7 A and determine the resulting vector, oriented vertically towards the top, of equal magnitude, thanks to the illustrated configuration whereby the opposite faces 7A and HA are inclined and mutually conjugated.

Thanks to this configuration, the weight force of the leaf 2B, which is distributed over the entire base side 2C, is uniformly discharged on all the support elements 11, and, consequently, on all the sliding members 5, dividing into equal parts on them.

The operation of the invention is described below.

Two modular carriages 1 are fixed, as mentioned, in the base side 2C of the sliding door 2B of the window 2.

Both modular carriages 1 allow the sliding members 5 included in them to slide in a guided way on the guide 4, allowing the opening or closing of the door 2B.

During installation or maintenance of the window frame 2, a calibration phase is provided, in which, by means of the adjustment means 6, it is possible to carry out the height adjustment previously described with particular reference to figs. 3, 5 and 7.

Consequently, when the guide 4 is fixed in a compartment that has an irregular base side, for example presenting flatness defects, also the door 2B tends to follow the same trend as the guide 4 on which it is installed. To avoid alignment problems of the closed leaves during the calibration phase, it is possible, by suitably screwing or unscrewing the pin 15 of one of the two modular carriages 1, to ensure that the upper faces 10A of the containment elements 10 are at exactly the same vertical height. In this way, it is possible to raise or lower, according to requirements, one of the modular trolleys 1 with respect to the other in order to lower or lift the relative portion (right or left) of the door, so that the latter is perfectly horizontal and aligned. with the door side by side.

If the course of the guide 4 is straight, but inclined with respect to the optimal horizontal line, by intervening on the adjustment means 6 it is possible to lift the containment element 10 of the modular trolley 1 which is located in the lowest area, in such a way as to compensate the height difference that occurs between the two lower edges of door 2B. To do this, an operator, using a tool designed for this use, inserts it into the recess 18 and, by screwing the threaded pin 15, pushes the mobile terminal element 13 progressively towards the inside of the containment element 10.

In turn, the terminal element 13, which has the inclined face 13A kept in contact with the face 7A of the contiguous wheel support element 7, transmits the thrust to all the wheel support elements 7 of the sliding members 5, causing the progressively the upper face 10A of the containment element 10, and with it also the side of the leaf 2B which faces the lowered part of the guide 4: in this way the position of the leaf 2B is corrected towards the normal and desired position horizontal.

During the pushing phase of the terminal element 13, the inclined surfaces 7A of the support elements 7 and the surfaces 11A of the support elements 11 slide sliding on each other. It should be noted that this relative sliding determines a variation in the distance D between the top of the support elements 7 and the upper face 10A of the containment element 10, which goes from a minimum value when the pin 15 is completely unscrewed (Fig. 3) to a maximum value when the pin 15 is completely screwed down (fig. 7).

The present invention is also particularly advantageous in the normal use of the window frame 2, once the calibration step described above has been completed, which is normally carried out by a specialized technician.

Fig. 2 shows an ideal condition, in which the linear guide 4 is perfectly planar and the carriage 1 has already been calibrated, in relation to the other carriage 1 mounted on the leaf 2B, in the calibration phase described above.

Figs. 2a-2d instead show conditions in which the guide 4 has defects or irregularities, in which the trend of the guide 4, deviated from the horizontal, has been emphasized to facilitate understanding. Each figure includes, below the guide 4, a straight segment or a curved line that reflect, schematizing and emphasizing it, the course of the sliding guide 4 immediately above. In detail, figs. 2a and 2b show conditions in which the sliding guide 4, albeit linear, is inclined and not perfectly horizontal; in one case increasing from left to right (fig.

2a), and vice versa (fig. 2b); see the greater distance between the guide 4 and the containment element 10 from the downward sloping part, respectively to the left in fig. 2a and on the right in fig. 2b.

Figs. 2c and 2d show, on the other hand, two different examples of conditions in which the guide 4 has a "wavy" course, ie in which a succession of ridges and depressions are present.

It should be noted how, in all these cases, all the wheels 8 are always in contact with the underlying guide 4, regardless of whether it is inclined or wavy.

In fact, it should be noted that, in all the conditions referred to in figs. 2a-2d, the distance D above the different sliding members 5 is potentially different for each of them since it changes according to the localized conformation of the sliding guide 4 at the exact point where the sliding member 5 is located at a given moment. In other words, during the sliding of the door 2B the distance D can vary in a manner related to the trend of the sliding guide 4, so as to compensate for defects or irregularities. In particular, the distance D increases at the points where the sliding guide 4 is at a lower vertical height (see for example the left side of fig. 2a and 2d the right side of fig. 2b and 2c) and - vice versa - it decreases at the points in which the guide 4 is at a higher vertical height (see for example the right side of fig. 2a and 2d the left side of fig. 2b and 2c).

This makes it possible to make all the support elements 7 independent of each other which, during the sliding of the door 2B on the sliding guide 4, self-adapt to the irregular profile of the latter, raising or lowering with respect to the support elements 11, to follow the depressions and the projections of the sliding guide 4 without the containment element 10 undergoing displacements in the vertical direction, ie without the door 2B being forced to make irregular movements during sliding.

It is clear that modifications and / or additions of parts can be made to the modular trolley 1 for sliding doors 2B of windows and doors 2 described up to now, for example by modifying the number of wheels 8 or supporting members 9 or supporting elements 7, or the number of carriages 1 to be used according to the dimensions and weight of the window frame 2, without thereby departing from the scope of the present invention as defined by the claims.

Furthermore, the shapes and dimensions may be any according to requirements, without thereby abandoning the scope of the protection of the following claims.

It is also clear that, although the present invention has been described with reference to some specific examples, a person skilled in the art will certainly be able to realize many other equivalent forms of the modular trolley for sliding doors and windows, having the characteristics expressed in the claims and therefore all falling within the scope of protection defined by them.

In the following claims, the references in brackets are for the sole purpose of facilitating reading and should not be considered as limiting factors as regards the scope of protection underlying the specific claims.

Claims (14)

CLAIMS 1. Modular trolley for doors and windows (2) comprising at least one movable leaf (2B), sliding with respect to a support frame (3) along a sliding direction (X) and provided with a base side (2C) to which intended to be fixed to said modular trolley, in which said modular trolley comprises a containment element (10) associated with said base side (2C) of said wing (2B) and a plurality of sliding members (5) which are associated with said containment element (10) and configured to slide along a sliding guide (4), which extends parallel to said sliding direction (X) and is fixed to a base side (3A) of said support frame ( 3); the modular trolley being characterized in that it comprises a plurality of support elements (7), arranged in succession along said sliding direction (X), movable independently from each other, and each configured to support at least one of said members (5), in which said support elements (7) are constrained to said containment element (10) so as to have two degrees of freedom of movement with respect to it, configured as two parallel linear translation movements respectively said sliding direction (X) and to a vertical direction (Z), perpendicular to said sliding direction (X), to ensure contact between said sliding members (5) and said sliding guide (4). 2. Trolley according to claim 1, characterized in that it comprises a plurality of support elements (11), arranged alternately with the support elements (7) so that each support element (11) is interposed between and in contact with , two of said consecutive support elements (7). 3. Trolley according to claim 2, characterized in that said support elements (7) and said support elements (11) have a wedge shape and include inclined faces (7A, 11A) having an inclination such as to be mutually conjugated to maintain in sliding contact against each other. 4. Modular trolley according to claim 1, characterized in that said support elements (7) and said support elements (11) are arranged in an inverted configuration with respect to each other, so that a base of greater extension of a group of wedge-shaped elements between said support elements (7) and said support elements (11) faces an upper face (10A) of said containment element (10), while a base of greater extension of the other group of wedge-shaped elements between said support elements (11) and said support elements (7) faces towards said sliding guide (4). 5. Trolley according to any one of the preceding claims, characterized in that it comprises a first terminal element (12) fixed to a lateral end of said containment element (10) and comprising an inclined face (12A) and conjugated to a inclined face (7A, 11 A) of one of said support element (7) or of one of said support element (11) arranged adjacent to said first terminal element (12) so that said inclined faces (12A; 7 A , 11 A) keep in sliding contact against each other. 6. Carriage according to any one of the preceding claims, characterized in that it comprises adjustment means (6) by means of which it is possible to modify the pitch (δ), or distance, between said sliding members (5), bringing them closer or further away from each other. them according to a direction parallel to said sliding direction (X), to obtain the height adjustment movement, parallel to said vertical direction (Z), of said containment element (10). 7. Trolley according to claim 6, characterized in that said adjustment means (6) comprise a second terminal element (13), slidably received in said containment element (10), so as to be movable along said sliding direction (X), wherein said second terminal element (13) is located in proximity to a lateral end of said containment element (10), opposite to another end in which a first fixed terminal element (12) is located, and comprises an inclined face (13A) and mating with an inclined face (7 A, 11 A) of one of said support element (7) or of one of said support element (11) arranged adjacent to said second terminal element (13 ) so that said inclined faces (13A; 7A, 11A) remain in sliding contact against each other; and that said adjustment means (6) comprise a threaded pin (15) which can be screwed / unscrewed with respect to its own support member (16) and configured to contact said second terminal element (13) so as to respectively reduce / increase said pitch ( δ), and consequently the height of said containment element (10), alternatively approaching said second terminal element (13) to said first terminal element (12) during screwing and, vice versa, moving it away from the latter during screwing unscrewing. 8. Trolley according to any one of the preceding claims, characterized in that said sliding members are selected from a group consisting of: at least one idle rotatable wheel (8) around its own rotation axis (R), or at least one rotation member bearing (9) lubricated with reduced sliding friction coefficient. 9. Trolley according to any one of the preceding claims, characterized in that said containment element (10) defines an internal compartment intended to receive at least said sliding members (5), the relative support elements (7) and said support members (16), in which said internal compartment has a certain height (H), measured parallel to said vertical direction (Z), related to the type of sliding guide (4). 10. Trolley according to any one of the preceding claims, characterized in that said base side (2C) of said sliding door (2B) can be suitably shaped to define, integrated in said base side (2C), said containment element ( 10) in which an internal compartment is defined which is intended to receive at least said sliding members (5), the relative support elements (7) and said support elements (11). 11. Trolley according to any one of the preceding claims, characterized in that said plurality of sliding members (5) comprises a number of sliding members (5) such that the modular trolley extends for a maximum of half the length of said leaf mobile (2B), measured parallel to said sliding direction (X). 12. Trolley according to any one of the preceding claims, characterized in that when said sliding members (5) are configured as rotating wheels (8), said support element (7) of said sliding members (5) is configured as an element elongated (22) which is provided with two seats each destined to receive and hold, in a rotatable way, a respective wheel (8). 13. A sliding window frame comprising at least one movable leaf (2B), sliding with respect to a support frame (3) along a sliding direction (X), and provided with a base side (2C) adjacent to a respective side of base (3 A) of said frame (3) on which a sliding guide (4) is fixed which extends parallel to said sliding direction (X), characterized in that it comprises at least two modular carriages (1) according to any one of the preceding claims, in which said modular carriages (1) are fixed to said base side (2C) of said movable door (2B), each in proximity to an opposite end of said base side (2C). 14. Sliding door or window according to claim 13, characterized in that said sliding guide (4) is made of soft materials, in particular of plastic materials.