WO2016139406A1

WO2016139406A1 - Mechanical connection of a plurality of profile sections

Info

Publication number: WO2016139406A1
Application number: PCT/FR2016/050436
Authority: WO
Inventors: Eric Courtin
Original assignee: Eric Courtin
Priority date: 2015-03-02
Filing date: 2016-02-25
Publication date: 2016-09-09
Also published as: FR3033373B1; FR3033373A1

Abstract

A fixed mechanical connection assembly (1), intended to mechanically connect a first profile section (2a), a second profile section (2b) and a third profile section (2c), that comprises a first subordinate fixed mechanical connection portion (3a) comprising a first cradle (5a) and a second cradle (5b), a second subordinate fixed mechanical connection portion (3b) comprising a first cradle (20a) and a second cradle (20b), and a third subordinate fixed mechanical connection portion (3c) comprising a first cradle (30a), a second cradle (30b) and a third cradle (30c), the second cradle (5b) of the first portion (3a) and the second cradle (20b) of the second portion (3b) together forming a common cradle (5b+20b), the common cradle (5b+20b) and the third cradle (30c) forming a common holding portion for holding the second profile section (2b).

Description

Mechanical connection of several profiles

The invention relates to the field of fixed mechanical connections for rigid profiles such as those adapted and intended for the realization of adapted modular carrier structures and intended for the realization of functional assemblies with implementation of the production at the fairest ("Lean Manufacturing ").

More specifically, the invention firstly relates to a set of mechanical connection parts adapted to provide a fixed mechanical connection of profiles, and any resulting fixed mechanical assembly.

The term "part" of the term "fixed mechanical connection piece" shall be understood to mean a unitary element that is adapted and intended by means of its association with one or more other elements, to perform the function and to provide the expected result, to know a fixed mechanical connection.

The term "assembly" in the expression "set of fixed mechanical connection parts" shall be understood to mean a complete and integral whole per se, adapted and intended, as such, to perform the function and provide the expected result, namely a fixed mechanical connection. Thus, a fixed mechanical connection assembly consists of several fixed mechanical connection parts.

The term "assembly" should be understood to mean the whole which comprises the considered sections and the parts and / or the fixed mechanical connection assembly or sets providing a fixed mechanical connection of the profiles to each other by their extrados.

The expression "fixed mechanical connection" applied to several sections must be understood as meaning that the sections are mechanically connected and joined to each other by one or more fixed mechanical connection parts and / or one or more fixed mechanical connection assemblies, so as to be rigidly secured, the assembly thus produced being dimensionally stable.

The qualifiers "rigid", "fixed", "indeformable", "solid" and "solidary" must be understood with reference to a context corresponding to the normal conditions of use.

Modular carrier structures are known for producing functional assemblies with the implementation of lean manufacturing. Such functional assemblies are varied in their function, the results they aim to provide, the realization, size, consumables or utilities for which they are intended, etc., and ultimately the process they are aimed at. to implement. As needed, such functional units can be adapted and intended to be fixed or moved. They can also be adapted and intended for static or dynamic operation.

The functional assemblies comprising the modular carrier structures in question here are intended for industrial production or logistics or even distribution processes, this list not being limiting. For example, they can be implemented in the automotive, railway, space, electronics, pharmaceutical and medical industries, in the manufacture of consumer products, luxury goods, packaging, in the supermarket sector. etc.

Such functional units are intended to be placed in workshops, manufacturing units, logistics or distribution centers, etc., this list not being limiting, and they are used by the personnel who are placed or moved nearby and most often must access it, and possibly even by the public or customers. For these reasons, it is important today that such functional units have an appearance that is, if not aesthetic, at least not unsightly. It is also important that they be, as far as possible, free of dirt traps and projections source of attachment. Moreover, such functional units must be able to be adapted according to the flexibility needs of the processes implemented, which supposes their easy assembly, their dismountability and the reuse of their constituent elements.

By way of example, FIG. 1 illustrates an arrangement of such known functional units where the staff is working near a work table resting on a base A, near which there are different shelves B having receptacles and a carriage C pulling wagons.

The requirements for such functional assemblies and, consequently, for such modular supporting structures, as well as their constituent sections, parts and / or mechanical connection assemblies, are, especially, the strength, the versatility (which includes both the possibility of using profiles, parts and assemblies of otherwise fixed mechanical connection, disassembly and reuse), durability (and non-degradability) over time and in an aggressive or difficult environment, ease of assembly, lightness for transportation, and of course cost, all things being equal.

In order to form such modular assemblies and such modular supporting structures, profiles are arranged and connected with each other. Thus, such modular carrier structures are generally like a solid perforated framework formed from profiles and parts and / or fixed mechanical connection assemblies connecting profiles between them and ensuring their fixed connection between them by their extrados . These structures may be adapted and intended to be associated with one or more specific complementary functional devices, such as receptacles, rails, rollers, stops, slides, wheels, means of training or displacement, etc., this list not being limiting.

The term "profile" should be understood, unless it is said otherwise, as referring both to an open section, for example having a U-shaped cross-section, to a profile closed laterally peripherally, such as a tube, or another embodiment allowing a peripheral application of a fixed mechanical connection piece.

By way of example, the document FR 3 006 724 describes a stationary mechanical connection assembly, intended to mechanically connect in a fixed manner a first section and a second profile, which comprises a first subordinate fixed mechanical connection piece and a second piece of analogous fixed mechanical connection.

However, such an assembly only allows to connect two profiles together. Also, in the case where it is necessary to connect three sections, as is usually the case for a modular carrier structure having end angles for example, two sets of fixed mechanical connection as described above should be used. The use of two sets for the connection of three profiles is not entirely satisfactory because then, these two sets are necessarily axially offset on the same profile relative to each other. This results in a shift of the three sections together, which can result in an imbalance and weakening of the modular structure thus produced.

Other mechanical connection parts, in particular metal, are also known for connecting three profiles to each other. Two pieces each form an angle and each have an L-shaped form. These pieces are first placed facing each other. The profiles are then connected to each other by being respectively interposed between the two mechanical connection pieces. More particularly, the ends of two sections are then connected to the ends of the parts. A third section is interposed between the parts at their corners and extends transversely relative to the other two sections.

However, the use of such parts is difficult when mounting a modular structure. Indeed, the user must simultaneously manually maintain the two mechanical connection pieces and the three profiles in a suitable configuration to be able to fix them together by one or more means of snaps such as bolts or screws. This operation may be difficult to achieve for a single person wishing to mount such a modular structure.

The present invention aims to solve the disadvantages described above.

According to a first aspect, the subject of the invention is a fixed mechanical connection assembly, intended to mechanically connect a first section, a second section and a third profile, which comprises:

a first fixed mechanical connection part comprising:

o a first cradle including a first wall whose intrados is adapted to receive, cooperate and come into contact with the extrados of a longitudinal section of the first profile, and o a second cradle including a second wall whose underside is adapted to receive, cooperate and come into contact with the extrados of a longitudinal section of the second profile, a second fixed mechanical connection part comprising:

a first cradle including a first wall whose intrados is adapted to receive, cooperate and come into contact with the extrados of a longitudinal section of the third section, and

a second cradle including a second wall whose intrados is adapted to receive, cooperate and come into contact with the extrados of a longitudinal section of the second section, a third fixed mechanical connection part comprising:

o a first cradle including a first wall whose intrados is adapted to receive, cooperate and come into contact with the extrados of a longitudinal section of the first profile, o a second cradle including a second wall whose underside is adapted to receive, cooperate and come into contact with the extrados of a longitudinal section of the third profile, and o a third cradle including a third wall whose intrados is adapted to receive, cooperate and come into contact with the extrados of a longitudinal section of the second profile, the second cradle of the first fixed mechanical connection piece and the second cradle of the second fixed mechanical connection piece together forming a common cradle adapted to receive, cooperate and come into contact with the longitudinal section of the second section the common cradle of the first and second fixed mechanical connection pieces and the third cradle forming a common holding part, particularly uniform and smooth, to maintain the second section.

In various embodiments according to the present invention, further and / or further of the following arrangements, taken separately or in combination, may optionally be employed in which:

the extrados of the second cradle of the first fixed mechanical connection piece comprises a functional zone, the intrados of the second cradle of the second fixed mechanical connection piece also comprising a functional zone, the functional zone of the first fixed mechanical connection piece. having a profile complementary to the functional zone of the second fixed mechanical connection part so that the functional zones are adapted to fit together with each other,

the functional zone of the first fixed mechanical connection piece comprises a relief, the functional zone of the second fixed mechanical connection piece also comprising a relief, the relief of the first fixed mechanical connection piece having a shape complementary to the relief of the second fixed mechanical connection part,

the reliefs of the first and second fixed mechanical connection parts respectively comprise recesses and projections,

the assembly comprises a first and a second clamping means, the first clamping means being mounted in a stepped through hole connecting the first fixed mechanical connection piece with the third fixed mechanical connection piece on the first profile, the second means of clamping being mounted in a stepped through hole connecting the second fixed mechanical connection piece with the third fixed mechanical connection piece on the third section.

The invention also relates to a fixed mechanical connection subassembly comprising the first fixed mechanical connection piece and the second fixed mechanical connection piece of the fixed mechanical connection assembly according to the invention.

The invention also relates to a fixed mechanical connection piece of the fixed mechanical connection assembly according to the invention.

the wall, the first cradle and / or the second cradle and / or the third cradle is composite and comprises, superimposed as a whole:

an outer layer-shaped portion, towards the extrados of the first cradle and / or the second cradle and / or the third cradle, having a high rigidity and a high resistance comparable to those of a rigid and resistant steel, limited by one side of the extrados of the mechanical connection piece fixed and limited on the other side by a rigid connection interface with a portion in the form of an inner layer, and

said portion in the form of an inner layer, bounded on one side by a rigid interface with the stiffening interface of the outer layer and limited on the other side by the intrados of the first cradle and / or the second cradle and / or the third cradle,

by means of a cradle / profiled permanent application force, the intrados of the first cradle and / or the second cradle and / or the third cradle is applied intimately on the extrados of the first section, second profile, of the third section, in the manner of a suction cup, thus participating in the fixed mechanical connection of the fixed mechanical connection parts and the three profiles,

the intrados of the first cradle and / or the second cradle has, in transverse cross section, a substantially semi-circular shape,

the piece comprises a fixed connection between the first cradle and the second cradle so that the first cradle and the second cradle form together and with the fixed connection, a generally rigid piece.

the first cradle has a projection or partition transverse to the fixed connection between the first cradle and the second cradle, the first and the third section respectively extending entirely on the same side of the first and second mechanical connection pieces fixed,

the piece comprises a fixed connection between the first cradle and the second cradle, the fixed connection comprising the third cradle and forming an angle between the first cradle and the second cradle,

the first cradle and the second cradle of the third part respectively have a transverse projection or partition transverse to the fixed connection, the first profile and the third section respectively extending entirely on the same side of the projection or partition; cross,

- The intrados of the third cradle has, in cross section, a quarter-circle shape. a positioning projection and a positioning hole are arranged symmetrically with respect to the through-hole, extending in the same direction of the through-hole, so that when the first and second stationary mechanical connection parts are associated respectively with the third fixed mechanical connection piece, the positioning projection of one cooperates with the positioning hole of the other and vice versa.

With parts having composite walls, it avoids the assemblies are unsightly appearance. Indeed, the mechanical connection parts can without great difficulty have an attractive shape, which is hardly possible with metal parts shaped and shaped thin sheet. It is also possible to provide that the outer face of the fixed mechanical connection parts is uniform and smooth. In addition, in the case especially of the subordinate parts, one can avoid the existence of a day or a substantial day visible between the two fixed mechanical connection parts arranged face to face.

The invention also relates to a profile assembly comprising a first section, a second section and a third profile mechanically connected in a fixed manner by a fixed mechanical connection assembly.

In various embodiments according to the present invention, it may be possible further to use one and / or the other of the following provisions, taken separately or in combination, wherein the first section, the second profile and the third profile respectively extend along transverse axes relative to each other,

The invention also relates to a modular support structure comprising a plurality of profiles and one or more fixed mechanical connection assembly according to the invention, and / or one or more fixed mechanical connection parts according to the invention.

The invention also relates to a functional assembly comprising a modular support structure according to the invention.

The figures of the drawings are now briefly described.

FIG. 1 is intended to illustrate the field of the invention and shows a known arrangement of functional assemblies with implementation of lean manufacturing.

Figures 2A and 2B are perspective views respectively of the extrados and intrados of the first fixed mechanical connection piece. FIGS. 3A and 3B are front views respectively of the extrados and of the intrados of the first fixed mechanical connection piece.

FIGS. 4A, 4B and 4C are cross-sectional views of FIG. 3B respectively along the sectional planes IVA-IVA, IVB-IVB and IVC-IVC.

Figures 5A and 5B are perspective views respectively of the upper and lower surfaces of the second fixed mechanical connection piece. Figures 6A and 6B are front views respectively of the upper and lower surfaces of the second fixed mechanical connection piece.

Figs. 7A, 7B and 7C are cross-sectional views of Fig. 6B respectively along section planes VI IA-VI IA, VIIB-VI IB and VI IC-VIIC.

Figure 8A is a sectional view of the first piece and the second fixed mechanical connection piece assembled with each other.

Figure 8B is a sectional view of Figure 8A in the plane of the section plane VII IB-VII IB.

Figures 9A and 9B are perspective views respectively of the extrados and intrados of the third fixed mechanical connection piece.

Figures 10A and 10B are front views respectively of the extrados and intrados of the third fixed mechanical connection piece.

FIG. 11 is a sectional view of FIG. 10A along the section plane XI-XI.

Figures 12A and 12B are respectively a sectional view and a perspective view of an assembly of three sections (shown in dashed lines) with a fixed mechanical connection assembly comprising three fixed mechanical connection parts.

Hereinafter a detailed discussion of an embodiment of the invention with reference to the drawings. The previously given definitions apply to this presentation and are not necessarily repeated.

In the field of the invention, as previously defined, a stationary mechanical connection assembly 1, is intended to mechanically connect in a fixed manner, where appropriate removable, a first section 2a, a second section 2b and a third section 2c. However, the present invention is not limited to the mechanical connection of three sections 2a, 2b, 2c.

When we want to designate a profile generically, we use the reference numeral 2.

In FIGS. 12A and 12B, the stationary mechanical connection assembly 1 comprises, in particular three, subordinate fixed mechanical connection pieces 3. Such parts are qualified as "subordinate" because they work together to connect profiles 2 A first subordinate fixed mechanical connection part 3a, a second subordinate fixed mechanical connection part 3b and a third subordinate fixed mechanical connection part 3c are intended to be connected together, with each other. The three parts 3a, 3b, 3c are thus part of the fixed mechanical connection assembly 1.

The first fixed mechanical connection part 3a is more particularly described by FIGS. 2A, 2B, 3A, 3B, 4A, 4B and 4C.

The first fixed mechanical connection piece 3a (hereinafter referred to as the "first piece") comprises, first of all, a first cradle 5a, having a first axis D1, including a first wall 6a whose intrados, or inner part free, 7a is adapted to receive, cooperate and come into contact with the extrados, or external part free, 8a of a longitudinal section 9a of the first section 2a. In particular, this longitudinal section 9a of the first section 2a is an end section.

The first part 3a also comprises a second cradle 5b, having a second axis E1, including a second wall 6b whose intrados 7b is adapted to receive, cooperate and come into contact with the extrados 8b of a longitudinal section 9b of the second section 2b. As illustrated in FIGS. 2B and 4A, the second cradle 5b extends from one edge to the other edge of the first piece 3a passing right through it.

With such an embodiment, the longitudinal section 9b of the second section 2b may be a section other than an end section and typically is not an end section. The first part 3a, and in particular the second cradle 5b, can also allow a connection to two second profiles 2b arranged in extension of one another, each extending entirely on the same side of the first part 3a to the opposite of each other.

The first cradle 5a and the second cradle 5b are turned on the same side of the first part 3a, along an axis Z, orthogonal to the first axis D1 and the second axis E2.

When one wants to generically designate a cradle of the first part 3a, the reference numeral 5 is used. Similarly, the reference numeral 6 for a wall is used, the numeral 7 for the intrados, the reference 12 for the extrados of the first piece 3a, the reference numeral 8 for the extrados of a profile 2, the reference numeral 9 for a section of a profile 2.

The first part 3a also comprises a fixed connection 19 between the first cradle 5a and the second cradle 5b. The expression "fixed link" must be understood as designating a more or less distinct part of the cradles 5a, 5b, which connects these cradles 5a, 5b so that they form together with the fixed link 19, a generally rigid part, the cradles 5a, 5b having a relative position fixed relative to each other.

With such a first piece 3a, by means of a permanent application force cradle 5 / profile 2 associated, in the direction of contact between the intrados 7 of the cradle 5 and the extrados 8 of the associated section 2, the cradle 5 and the profile 2 associates are attached in a fixed manner. Thus, the first section 2a and the second profile 2b are fixed together.

Referring now more specifically to Figure 4A which illustrates, in the case of the first part 3a, that the first cradle 5a has inside a projection or transverse wall 29 located towards the fixed connection 19. The first section 2a, which extends entirely on the same side of the first connecting piece 3a (opposite the second cradle 5b) can, if necessary abut against this projection or transverse partition 29.

In the embodiment shown, the first axis D1 and the second axis E1 are arranged relative to each other transversely, at right angles. This embodiment is not limiting, the first axis D1 and the second axis E1 may also, in other embodiments not shown, be arranged with any inclination relative to each other.

The extrados, or free outer part, 12 of the first part 3a, and in particular the extrados 12b of the second cradle 5b, is also adapted to receive, cooperate and come into contact with the intrados, or free inner part, 22 of the second mechanical connection piece 3b, as will be described hereinafter in more detail. The upper surface 12b of the second cradle 5b comprises a stop 14 delimiting a functional zone 40 of the extrados 12 of the second cradle 5b. The abutment 14 extends from one edge to the other edge of the second cradle 5b in the direction of the second axis E1, having for example a slightly curved shape. The stop 14 thus forms an angle a1 between the functional zone 40 and the remainder of the extrados 12 of the second cradle 5b. In particular, the angle a1 formed by the stop may be a right angle or an angle greater than 90 degrees. The functional zone 40 of the second cradle 5b thus extends from the stop 14 to the end 43 of the extrados 12b of the second cradle 5b. The wall 6b of the functional zone 40 has in particular a thickness less than the thickness of the wall 6b of the remainder of the second cradle 5b.

Due to the smaller thickness of the functional zone 40 of the extrados 12b, this functional zone 40 also includes lateral recesses 16a, 16b on either side of the second cradle 5b along the second axis E1, in particular at the the stop 14.

The functional area 40 of the extrados 12b comprises a relief 17. The relief 17 comprises in particular one or more recesses 17a transverse to the second axis E1. In the embodiment where the first relief comprises several recesses 17a, these recesses 17a thus form projections 17b between them, so that the relief 17 comprises recesses 17a and projections 17b alternately. The relief 17 is more particularly centered on the functional zone 40 of the extrados 12b with respect to the second axis E1. The relief 17, and in particular the recesses 17a and projections 17b, extend substantially over the entire length of the functional zone 40 to the end 43 of the extrados 12b along the first axis D1. Thus, the relief 17 may partially or entirely cover the functional zone 40 of the extrados 12 of the first part 3a.

More specifically, according to the embodiment illustrated more particularly in Figures 2A and 3A, the relief 17 comprises six recesses 17a and five projections 17b. However, the invention is not limited to this embodiment and the functional zone 40 of the extrados 12 may comprise a different relief 17, for example with a larger number of recesses and projections. The relief 17 may also include other different patterns, such as circular projections, pads, or other.

In addition, according to the embodiment illustrated more particularly in Figures 2A and 3A, the relief 17 may also include a recess or projection 18 extending along the second axis E1, having for example a slightly curved shape. According to one embodiment more particularly represented in the figures, and in particular in FIG. 2A, the relief 17 thus comprises a projection 18 passing through the recesses 17a and the projections 17b of the functional zone 40 of the extrados 12. This projection 18 connects in particular between them the projections 17b of the relief 17. The recess or projection 18 may in particular be located in the center of the first relief 17 with respect to the first axis D1 or the first third of the length of the first relief 17 starting from the stop 14 towards the end 43 of the extrados 12b.

The projection 18 is delimited by two side walls 18a, 18b, the wall 18a is located on the side of the abutment 14 while the wall 18b is located on the side of the end 43 of the extrados 12b of the second cradle 5b. The two side walls 18a, 18b may form a right angle with the extrados 12 of the second cradle 5b, in particular with the recesses 17a of the first relief 17, or may form an angle greater than 90 degrees with the extrados 12 of the second cradle 5b . In addition, the two side walls 18a, 18b do not necessarily form the same angle with the extrados 12.

The second mechanical connection piece 3b (hereinafter referred to as the "second piece") included in the mechanical connection assembly 1 is now described. The second piece 3b is more particularly described in FIGS. 5A, 5B, 6A, 6B, 7A, 7B and 7C. In the same way as the first part 3a, the second part 3b comprises, first of all, a first cradle 20a, having a first axis Z1, including a first wall 21a whose intrados 22a is adapted to receive, cooperate and come into contact with the upper surface 8c of a longitudinal section 9c of the third section 2c. In particular, this longitudinal section 9c of the third section 2c is an end section.

The second fixed mechanical connection piece 3b also comprises a second cradle 20b having a second axis E2. The second cradle 20b includes a second wall 21b whose intrados 22b is adapted to receive, cooperate and come into contact with the extrados 8b of the longitudinal section 9b of the second profile 2b. The first cradle 20a and the second cradle 20b are turned on the same side of the second piece 3b, along an axis D, orthogonal to the first axis Z1 and the second axis E2.

When one wants to generically designate a cradle of the second piece 3b, the reference numeral 20 is used. Similarly, the reference numeral 21 for a wall is used, the numeral 22 for the intrados and the numeral 35 for the extrados of the second piece 3b.

The second piece 3b also comprises a fixed connection 23 between the first cradle 20a and the second cradle 20b (the expression "fixed link" to be understood as for the first piece 3a).

In addition, in the same way as the first part 3a, the first cradle 20a has inside a projection or transverse partition 24 located towards the fixed connection 23. The third section 2c, which extends entirely from the same side of the second piece 3b (opposite the second cradle 20b) can, if necessary abut against this projection or transverse partition 24.

As shown in FIG. 7A, the second cradle 20b extends from one edge to the other edge of the second piece 3b, passing right through it. With such an embodiment, the second piece 3b is able to be connected to the second section 2b extending on both sides of the second piece 3b. The second piece 3b may also allow a connection to two second sections 2b arranged in extension of one another, each extending entirely on the same side of the second piece 3b opposite one of the 'other.

In the embodiment shown, the first axis Z1 and the second axis E2 are arranged relative to each other transversely, at right angles. This embodiment is not limiting, the first axis Z1 and the second axis E2 may also, in other embodiments not shown, be arranged with any inclination relative to each other.

The lower surface 22b of the second cradle 20b also has a transverse stop 27 delimiting a functional zone 41 of the intrados 22b of the second cradle 20b. The transverse stop 27 extends along the second axis E2 between two longitudinal stops 28a, 28b extending along the first axis Z1. In particular, the longitudinal stops 28a, 28bs extend from the transverse stop 27 along the first axis Z1 and end with lateral stops 39a, 39b towards the end 44 of the second cradle 20b. The wall 21b of the functional zone 41 has in particular a thickness less than the thickness of the wall 21b of the remainder of the second cradle 20b.

The transverse stop 27 forms an angle a2 between the functional zone 41 and the remainder of the intrados 22b of the second cradle 20b. In particular, the angle a2 formed by the transverse stop 27 may be a right angle or an angle greater than 90 degrees. The functional zone 41 of the second cradle 20b thus extends from the abutment transverse 27, and between the longitudinal stops 28a, 28b, to the end 44 of the lower surface 22b of the second cradle 20b along the first axis Z1.

The functional zone 41 of the intrados 22b comprises a relief 25. The relief 25 of the intrados 22b is particularly adapted to receive, cooperate and come into contact with the relief 17 of the extrados 12b of the first piece 3a, as this will be described below in more detail. Thus, the relief 25 of the intrados 22b of the second piece 3b is complementary to the relief 17 of the extrados 12b of the first piece 3a.

The relief 25 of the functional zone 41 of the intrados 22b comprises in particular transverse projections with respect to the second axis E2. The relief 25 is more particularly centered on the functional zone 41 of the intrados 22b along the second axis E. More particularly, according to the embodiment illustrated by FIGS. 5B and 6B, the functional zone 41 of the intrados 22b comprises four projections 25a. . These four projections 25a of the intrados 22b of the second part 3b are in particular adapted to cooperate and come into contact with the four recesses 17a of the functional zone 40 of the extrados 12b of the first part 3a.

In addition, the functional zone 41 of the lower surface 22b also comprises a recess 26 extending in the direction of the second axis E2. According to an embodiment more particularly represented in the figures, and in particular in FIG. 6B, the recess 26 is a hollow crossing the projections 25a of the functional zone 41 of the intrados 22. In particular, the recess 26 is complementary to the projection 18 of the functional zone 40 of the extrados 12b of the first piece 3a.

The third mechanical connection piece 3c (hereinafter referred to as the "third piece") included in the mechanical connection assembly 1 is now described. The third piece 3c is more particularly described by FIGS. 9A, 9B, 10A, 10B and 11.

The third piece 3c comprises, first of all, a first cradle 30a, along a first axis D2, including a first wall 31a whose underside 32a is adapted to receive, cooperate and come into contact with the extrados 8a of the section longitudinal 9a of the first section 2a.

The third piece 3c also comprises a second cradle 30b, along a second axis Z2, including a second wall 31b whose intrados 32b is adapted to receive, cooperate and come into contact with the upper surface 8c of the longitudinal section 9c of the third section. 2c.

The first cradle 30a and the second cradle 30b of the third piece 3c are arranged relative to each other so as to form an angle between them. In particular, as illustrated in Figures 1 1, 12A and 12B, the first cradle 30a and the second cradle 30b are arranged relative to each other transversely, at right angles. According to this embodiment, the first axis D2 and the second axis Z2 are perpendicular to each other, the third part 3c thus having an L shape.

The third fixed mechanical connection part 3c also includes a fixed connection 33 (the expression "fixed connection" to be understood as for the first and second parts 3a, 3b) between the first cradle 30a and the second cradle 30b. The fixed link 33 is located in particular at the angle formed between the first cradle 30a and the second cradle 30b.

In addition, the third piece 3c, and in particular the fixed link 33, also comprises a third cradle 30c along a third axis E3. In the embodiment shown, the third cradle 30c of the third piece 3c, in particular the lower surface 32c, has in transverse cross section a shape corresponding to a quarter circle. However, this achievement is not exclusive of others.

The third cradle 30c also has a third wall 31c whose intrados 32c is adapted to receive, cooperate and come into contact with the extrados 8b of a longitudinal section 9b of the second profile 2b. As can be seen in FIG. 11, the third cradle 30c extends from one edge to the other edge of the third piece 3c, passing right through it.

The first cradle 30a has inside a projection or transverse partition 34a located towards the fixed connection 33. The first section 2a, which extends entirely on the same side of the third piece 3c (transversely to the second cradle 30b) can, if necessary abut against this projection or transverse partition 34a. The second cradle 30b also has inside a projection or transverse partition 34b located towards the fixed connection 33. The third profile 2c, which extends entirely on the same side of the third mechanical connection piece 3c can also, if necessary come into abutment against this projection or transverse partition 34b.

The first, second and third fixed mechanical connection parts 3a, 3b, 3c may consist of the same materials or may be made of different materials. In particular, one of the walls 6, 21, 31 of the first, second and third parts 3a, 3b, 3c or all the walls 6, 21, 31 may be made of metal, plastic or other. The first, second and third fixed mechanical connection parts 3a, 3b, 3c may in particular be molded. More generally, the first, second and third parts 3a, 3b, 3c may consist of any sufficiently rigid material so as to form a mechanical connection assembly 1 satisfactory to perform the function and provide the expected result, namely a connection fixed mechanics.

According to the embodiment shown in the figures, the walls 6, 21, 31 of the cradles 5, 20, 30 may respectively be composite and each comprise, superimposed together, an outer layer-shaped portion 10 and a portion thereof. inner layer shape 1 1. Subsequently, the outer layer-shaped portion 10 is referred to as the "outer layer" 10 and the inner layer-shaped portion 11 is referred to as the "inner layer" 11. In the embodiment shown, this constructive arrangement is found both for the first cradles 5a, 20a, 30a and for the second cradles 5b, 20b, 30b of the first, second and third parts 3a, 3b, 3c, and for the third cradle 30c of the third piece 3c.

The term "superimposed" should be understood to mean that the two parts 10 and 11 are placed one over the other and the expression "all integral" as meaning that the two parts 10 and 1 1 are indissociable, once performed.

The term "layer" should be understood to mean that parts 10 and 11 have a superficial extent and a relatively small thickness compared to the superficial extent.

The term "interior" and the term "exterior" should be understood in relation to what in the profile assembly is, respectively, inwardly, i.e., near or turned in the profiles 2, and outwardly, that is to say remote, separated, remote or turned away from the profiles 2.

The outer layer 10 is located towards the extrados or outer free face 12, 35, 36 of the cradles 5, 20, 30 of the first, second and third fixed mechanical connection parts 3a, 3b, 3c. It is limited, outward, by the extrados 12, 35, 36 and inwardly by a rigid connection interface 13 with the inner layer 1 1.

The inner layer 1 1 is located towards the lower or inner free face 7, 22, 32 of the cradles 5, 20, 30 of the first, second and third fixed mechanical connection parts 3a, 3b, 3c. It is limited, on one side (towards the inside), by the intrados 7, 22, 32 and, on the other side (towards the inside) by a rigid securing interface 15 with the outer layer 10.

The outer layer 10 has a high rigidity and high strength comparable to those of a rigid steel and resistant and therefore dimensionally stable. It may be made of a plastic material which is a partially aromatic polyamide thermoplastic, in particular reinforced with glass fibers, carbon or the like.

The inner layer 1 1 is made of thermoplastic polyurethane or the like, having good strength and elastic flexibility, but low. To illustrate the low degree of flexibility, it can be said that a strong application of a finger on the intrados 7, 22, 32 of the inner layer 1 1 is insufficient to deform, while a strong application with a tool pointed (such as a screwdriver) leads to a local deformation, in this case a depression, circumscribed at the point where the pointed tool is applied. In addition, this local deformation, depression, is elastic, the intrados 7, 22, 32 returning to its original shape once stopped the application of the pointed tool. Thus, when the profile assembly is made, the inner layer 1 1 is not, or not substantially, or only very slightly compressed. In addition, the intrados 7, 22, 32 is uniform and smooth. It is in particular devoid of projections known from the state of the prior art. In addition, it has a high sliding friction relative to the extrados 8 of the profiles 2. The flexibility of the inner layer 1 1 is essentially to ensure that when performing the assembly of profiles by application respective fixed mechanical connection piece 3 / profiled 2, the intrados, inner free face 7, 22, 32 of the inner layer 1 1 fits perfectly and intimately the extrados 8 of the section 2 considered. The flexibility of the inner layer 1 1 does not therefore result in a substantial crushing of the inner layer January 1, as would be the case, for example, with a compressible plastic gasket whose thickness can be reduced so important when one exerts on him even limited pressure.

The rigid securing interface 13 of the outer layer 10 and the rigid securing interface 15 of the inner layer 1 1 are secured in a fixed and inseparable manner.

To obtain such a structure, it is possible to produce the wall 6, 21, 31 of the first, second and third fixed mechanical connection pieces 3 by injection of a plastic material forming the outer layer 10 and thermoplastic polyurethane or the like forming the inner layer 1 1, in particular by bi-injection.

With such an embodiment, the permanent application force cradle 5, 20, 30 / associated section 2, previously mentioned is such that the intrados 7, 22, 32 of the cradle 5, 20, 30 is applied intimately on the extrados 8 of the associated section 2, in the manner of a sucker, which thus participates in the fixed mechanical connection of the fixed mechanical connection part 1 and the two sections 2.

By "in the manner of a suction cup" applied to the intrados 7, 22, 32 of the cradle 5, 20, 30 and the extrados 8 of the associated section 2, it is to be understood that the inner layer 1 1, without being strictly speaking a suction cup, acts in a manner similar to that of a suction cup, in that, as a result of the intimate application of the intrados 7, 22, 32 on the extrados 8 , the intrados 7, 22, 32 tends to adhere, or adheres, to the second extrados 8, the air between them tending to be hunted or being driven, and this because of the flexibility of the inner layer 1 1, the rigidity of the section 2, and while it is possible that the entire intrados 7, 22 , 32 intended to be applied on and in contact with the upper surface 8 is, like the inner layer, thermoplastic polyurethane or the like.

In the embodiment shown, the first and second cradles 5a, 5b, 20a, 20b, 30a, 30b of the first, second and third parts 3a, 3b, 3c, in particular the intrados 7, 22, 32, have in transverse cross section a substantially semicircular shape. However, this achievement is not exclusive of others.

A profile 2 can be made of reinforced plastic material and have a smooth upper surface 8. As described, the fixed mechanical connection of the profiles 2 between them is provided by their only extrados 8.

Referring now more specifically to Figures 8A and 8B which illustrate a sectional view of a fixed mechanical connection subassembly 4 comprising the first and second parts 3a, 3b as previously described connected to each other. In particular, Figure 8A shows a sectional view along a plane passing through the first axis D1 and the first axis Z1 of the first and second parts 3a, 3b connected to each other.

As represented in FIG. 8A, the first part 3a is suitable and intended to be associated with the second part 3b around the same profile 2, and in particular with the second profile 2b. In this way, the axes E1 and E2 are thus merged with a common axis E. More precisely, the second cradle 5b of the first part 3a and the second cradle 20b of the second part 3b have the same common axis E.

More specifically, the functional zone 40 of the extrados 12b of the first piece 3a has a profile complementary to the functional zone 41 of the intrados 22b of the second piece 3b. In particular, the functional areas 40, 41 are adapted to fit together.

Even more precisely, the relief 17 of the first piece 3a, in particular the recesses 17a and the projections 17b, are adapted to receive, cooperate and come into contact with the relief 25 of the intrados 22b of the second piece 3b. As shown in greater detail in FIG. 8B, each of the recesses 17a cooperate by complementary shape respectively with the projections 25a of the relief 25 of the intrados 22b. This complementarity of shape makes it possible to maintain the first and second parts 3a, 3b with each other, in particular along the common axis E.

In the same way, the projection 18 of the functional zone 40 of the first part 3a cooperates in complementary form with the recess 26 of the functional zone 41 of the second part 3b. This complementarity of shape makes it possible to maintain the first and second parts 3a, 3b with each other, in particular along the first axis D1 of the first part 3a.

In addition, when the first and second parts 3a, 3b are connected together, the end 43 of the second cradle 5b of the first part 3a comes into contact with the transverse stop 27 of the second part 3b. Similarly, the end 44 of the second cradle 20b of the second 3b comes into contact with the abutment 14 of the first piece 3a. The angles α1, a2 thus allow good complementarity and easy assembly of the first part 3a with the second part 3b, and vice versa. In addition, the lateral recesses 16a, 16b on either side of the second cradle 5b along the second axis E1 abut with the ends of the lateral abutments 39a, 39b of the second cradle 20b of the second part 3b.

Thus arranged, the first part 3a and the second part 3b form a fixed mechanical connection subassembly 4. The first part 3a and the second part 3b of the fixed mechanical connection subassembly 4 are arranged relative to each other. other so as to form an angle between them. In particular, as illustrated in the figures, the first part 3a and the second part 3b are arranged relative to each other transversely, at right angles. According to this embodiment, the mechanical connection subassembly then has a shape complementary to that of the third piece 3c described above, and in particular an L shape.

In addition, thus arranged, the second cradle 5b of the first part 3a and the second cradle 20b of the second part 3b together form a common cradle 5b + 20b adapted to receive the second section 2b. In particular, the cradle 5b + 20b thus formed has a smooth surface (with irregularities near the transverse abutment junction 27 / end 43). As shown, the common cradle 5b + 20b has for example a cross section along the common axis E corresponding to a three-quarter circle. The common cradle 5b + 20b thus formed has a smooth intrados 7b + 22b (with irregularities near the transverse abutment junction 27 / end 43). In the same way, the common cradle 5b + 20b thus formed has a smooth extrados 12b + 35b (with irregularities near the abutment junction 14 / end 44). Moreover, because of the smaller thickness of the functional areas 40, 41, the common cradle 5b + 20b has a substantially constant thickness between the intrados 7b + 22b and the extrados 12b + 35b. In other words, the cumulative thickness of the functional zones 40, 41 corresponds to the thickness of the remainder of the first part 3a or the second part 3b.

Referring now more specifically to FIGS. 12A and 12B which respectively illustrate a sectional view as well as a perspective view of a stationary mechanical connection assembly 1 comprising the first, second and third parts 3a, 3b, 3c as previously described connected to each other. In particular, FIG. 12A represents a sectional view of the stationary mechanical connection assembly 1 of FIG. 12B along a plane passing through the Z and D axes described below.

As shown in Figure 12B, the first part 3a is adapted and intended to be rigidly associated with the third part 3c around the same section 2, and in particular the first section 2a. Thus, the first cradle 5a of the first piece 3a and the first cradle 30a of the third piece 3c have the same first common axis D. In this way, the axes D1 and D2 are thus merged with the common axis D.

More specifically, the first piece 3a and the third piece 3c are in contact with each other or in close proximity to one another, so that no day, or any substantial day, exists between the first and third parts 3a, 3c. In particular, the production of the parts 3, in particular by molding, makes it possible to define joint planes between the first part 3a and the third part 3c without a day, which makes it possible to avoid the presence of sharp edges and to guarantee good sealing between the first and third parts 3a, 3c. The first cradle 5a and the first cradle 30a are then directed towards each other so as to form a holding portion, in particular smooth and uniform circumferentially surrounding the longitudinal portion 9a of the first profile 2a. The first piece 3a is thus adapted and intended to be rigidly associated with the third piece 3c, at least partially, around the second section 2b.

After having connected the first part 3a with the third part 3c, in particular with the first section 2a and the second section 2b, the second profile 2c is then placed in the second cradle 30b of the third section. room 3c. The second piece 3b is then mounted with the first piece 3a and the third piece 3c. The second piece 3b is also suitable and intended to be rigidly associated with the third piece 3c around the same profile 2, and in particular the third section 2c. Thus, the first cradle 20a of the second piece 3b and the second cradle 30b of the third piece 3c have the same first common axis Z. In this way, the axes Z1 and Z2 are thus merged with the common axis Z.

More specifically, the second piece 3b and the third piece 3c are in contact with each other or in close proximity to one another, so that no day, or any substantial day, exists between the second and third parts 3b, 3c. In particular, the production of the parts 3, in particular by molding, makes it possible to define joint planes between the second part 3b and the third part 3c without a day, which makes it possible to avoid the presence of sharp edges and to guarantee good sealing between the second and third parts 3b, 3c. The first cradle 20a and the second cradle 30b are then directed towards each other so as to form a holding portion, in particular smooth and uniform, circumferentially surrounding the longitudinal portion 9c of the third section 2c.

Once the parts 3a, 3b, 3c are connected together, the common cradle 5b + 20b of the first and second parts 3a, 3b and the third cradle 30c form a holding portion, in particular smooth and uniform, circumferentially surrounding the longitudinal section 9b of the second profile 2b. In particular, the holding part, and in particular the common cradle 5b + 20b and the third cradle 30c comprise an inner layer 1 1 in contact with the upper surface 8c of the third section 2c. With such an embodiment, the second section 2b is associated with the holding part in the manner of a suction cup, as described above, which ensures a good maintenance of the second profile 2b.

With the invention, the first, second and third parts 3a, 3b, 3c form an assembly 1 for holding the profiles 2. Due to the complementarity of the parts 3a, 3b, 3c and the combination of the intrados 7 , 22, 32 of the cradles 5, 20, 30 with the extrados 8 of the profiles 2 in the manner of a sucker, the assembly 1 can stand on its own, that is to say have a temporary hold, without requiring prior fixation. This is particularly the case when the parts 3 are composite and include an inner layer 1 1 as described above. Thus, a single person can easily mount the assembly 1 on the profiles 2 and then mount clamping means 45a, 45b as will be described below, without having to manually hold the parts together.

In order to fix the first part 3a with the third part 3c, there is provided, in particular in the fixed connection 19 and in the fixed connection 33, a stepped through hole 37a, adapted and intended to allow the mounting of a first clamping means 45a such as a bolt, in particular screwed into a metal insert 46a reported in the through hole 37a.

The through hole 37a extends along an axis F1, in particular parallel to the common axis Z. In the fixed mechanical connection assembly 1, the through holes 37a of the first part 3a and the third part 3c come into correspondence, the arrangement of the through holes 37a on the first part 3a and on the third part 3c being suitable and intended for this purpose.

Due to the first clamping means 45a housed in the through holes 37a, it is possible to obtain a permanent, firm and intimate application of the first part 3a and the third part 3c on the extrados 8a of the first section 2a. The stepped through hole 37a is located in the middle position respectively in the fixed connection 19 of the first part 3a. The stepped through hole 37a is located near the first cradle 30a in the fixed link 33 of the third piece 3c. In addition, for each of the first and third parts 3a, 3c, a positioning projection 38a and a positioning hole 38b are symmetrically formed with respect to the stepped through hole 37a, extending in the same direction as the axis of the hole, that is to say along the axis F1. The arrangement of the positioning projection 38a and the positioning hole 38b on the first and third parts 3a, 3c is such that when the first part 3a and the third part 3c are associated, the positioning projection 38a of one cooperates with the positioning hole 38b of the other and vice versa.

In order to fix the second part 3b with the third part 3c, there is provided, in particular in the fixed connection 23 and in the fixed connection 33, a stepped through hole 37b, adapted and intended to allow the mounting of a second clamping means 45b such as a bolt, in particular screwed into a metal insert 46b reported in the through hole 37b.

The through hole 37b extends along an axis F2, in particular parallel to the common axis D. In the fixed mechanical connection assembly 1, the through holes 37b of the second part 3b and the third part 3c come into correspondence, the arrangement of the holes 37b on the second part 3b and on the third part 3c being suitable and intended for this purpose.

Because of the second clamping means 45b housed in the through holes 37b, it is possible to obtain a permanent, firm and intimate application of the second part 3b and the third part 3c on the upper surface 8c of the third profile 2c.

As for the first part 3a, the stepped through hole 37b is located in the middle position the fixed connection 23. The stepped through hole 37b is located near the second cradle 30b in the fixed connection 33 of the third part 3c. In addition, for each of the second and third parts 3b, 3c, a positioning projection 38c and a positioning hole 38d are symmetrically arranged with respect to the stepped through hole 37b, extending in the same direction as the axis of the hole, that is to say along the axis F2. The arrangement of the positioning projection 38c and of the positioning hole 38d on the second and third parts 3b, 3c is such that when the second part 3b and the third part 3c are associated, the positioning projection 38c of one cooperates with with the positioning hole 38d of the other and vice versa.

According to the embodiment shown, the common axes D, E and Z are arranged relative to each other transversely, at right angles. This embodiment is not limiting, the common axes D, E and Z may also, in other embodiments not shown, be arranged with another angle of inclination with respect to each other.

The parts 3 according to the embodiment described above make it possible to produce such a set of fixed mechanical connection 1 which, with the first section 2a, the second profile 2b and the third profile 2c, make it possible to form a connection of sections, connected rigidly.

The invention also relates to a modular support structure comprising a plurality of profiles 2 and one or more sets of fixed mechanical connection 1, one or more fixed mechanical connection parts 3, arranged to provide a fixed mechanical connection between the profiles 2. A such modular load-bearing structure is perforated, rigid, and it is designed to be adapted and intended for the realization of functional assemblies with implementation of the production just lean ("Lean Manufacturing"). Such functional units for an industrial production or logistics or distribution process with implementation of lean manufacturing are, for example, shelves, bases (for example for a worktop), services, conveyors, guiding devices, picking devices, unloading devices, trolleys, wagons, workstations. They comprise a modular carrier structure as mentioned above and one or more specific additional functional devices, such as receptacles, rails, rollers, stops, slides, wheels, drive means or displacement means.

Claims

claims

1. Stationary mechanical connection assembly (1), for mechanically connecting a first section (2a), a second profile (2b) and a third section (2c), which comprises:

a first fixed mechanical connection part (3a) comprising:

a first cradle (5a) including a first wall (6a) whose intrados (7a) is adapted to receive, cooperate and come into contact with the extrados (8a) of a longitudinal section (9a) of the first section ( 2a), and

a second cradle (5b) including a second wall (6b) whose intrados (7b) is adapted to receive, cooperate and come into contact with the extrados (8b) of a longitudinal section (9b) of the second section ( 2b)

a second fixed mechanical connection part (3b) comprising:

a first cradle (20a) including a first wall (21a) whose intrados (22a) is adapted to receive, cooperate and come into contact with the extrados (8c) of a longitudinal section (9c) of the third section (2c), and

a second cradle (20b) including a second wall (21b) whose intrados (22b) is adapted to receive, cooperate and come into contact with the extrados (8b) of a longitudinal section (9b) of the second section (2b)

a third fixed mechanical connection part (3c) comprising:

a first cradle (30a) including a first wall (31a) whose intrados (32a) is adapted to receive, cooperate and come into contact with the extrados (8a) of a longitudinal section (9a) of the first section (2a)

a second cradle (30b) including a second wall (31b) whose intrados (32b) is adapted to receive, cooperate and come into contact with the extrados (8c) of a longitudinal section (9c) of the third section (2c), and

a third cradle (30c) including a third wall (31c) whose intrados (32c) is adapted to receive, cooperate and come into contact with the extrados (8b) of a longitudinal section (9b) of the second section (2b)

the second cradle (5b) of the first fixed mechanical connection piece (3a) and the second cradle (20b) of the second fixed mechanical connection piece (3b) together forming a common cradle (5b + 20b) adapted to receive, co-operate and come into contact with the longitudinal section (9b) of the second profile (2b), the common cradle (5b + 20b) of the first and second fixed mechanical connection parts (3a, 3b) and the third cradle (30c) forming a part common holding to maintain the second section (2b).

2. Assembly (1) according to claim 1, wherein the extrados (12b) of the second cradle (5b) of the first fixed mechanical connection piece (3a) comprises a functional zone (40), the intrados (22b). the second cradle (20b) of the second fixed mechanical connection piece (3b) also comprising a functional zone (41), the functional zone (40) of the first fixed mechanical connection piece (3a) having a complementary profile of the zone functional (41) of the second fixed mechanical connection piece (3b) so that the functional areas (40, 41) are adapted to fit together.

3. Assembly (1) according to the preceding claim, wherein the functional zone (40) of the first fixed mechanical connection piece (3a) comprises a relief (17), the functional zone (41) of the second mechanical connection piece. fixed (3b) also comprising a relief (25), the relief (17) of the first piece of fixed mechanical connection (3a) having a shape complementary to the relief (25) of the second fixed mechanical connection part (3b).

4. Assembly (1) according to the preceding claim, wherein the reliefs (17, 25) of the first and second fixed mechanical connection parts (3a, 3b) respectively comprise recesses and projections.

5. An assembly (1) according to any preceding claim, comprising a first and a second clamping means (45a, 45b), the first clamping means (45a) being mounted in a stepped through hole (37a) connecting the first fixed mechanical connection piece (3a) with the third fixed mechanical connection piece (3c) on the first profile (2a), the second clamping means (45b) being mounted in a stepped through hole (37b) connecting the second piece fixed mechanical connection piece (3b) with the third fixed mechanical connection piece (3c) on the third profile (2c).

6. Fixed mechanical connection subassembly (4) comprising the first fixed mechanical connection piece (3a) and the second fixed mechanical connection piece (3b) of the fixed mechanical connection assembly (1) according to any one of of the preceding claims, wherein:

the first fixed mechanical connection part (3a) comprises:

the second fixed mechanical connection part (3b) comprises:

the second cradle (5b) of the first fixed mechanical connection piece (3a) and the second cradle (20b) of the second fixed mechanical connection piece (3b) together forming a common cradle (5b + 20b) adapted to receive, co-operate and come into contact with the longitudinal section (9b) of the second profile (2b).

7. Fixed mechanical connection piece (3a) of the stationary mechanical connection assembly (1) according to any one of claims 1 to 5, comprising:

in which the wall (6) of the first cradle (5a) and / or the second cradle (5b) is composite and comprises, superimposed as a whole: a part in the form of an outer layer (10) towards the extrados (12) limited on one side by the extrados (12) of the fixed mechanical connection part (3a) and limited on the other side by a rigid securing interface (13), and

a part in the form of an inner layer (1 1), limited on one side by a rigid connection interface (15) with the rigid connection interface (13) of the outer layer (10) and limited on the other side by the intrados (7),

by means of a permanent cradle (5) / profile (2) application force, the intrados (7) of the first cradle (5a) and / or the second cradle (5b) is applied in an intimate manner to the upper surface (8a, 8b) of the first profile (2a) and / or second profile (2b) in the manner of a suction cup, thereby participating in the fixed mechanical connection of the fixed mechanical connection parts (3a, 3b, 3c) and the three profiles (2a). , 2b, 2c).

Fixed mechanical connection part (3b) of the stationary mechanical connection assembly (1) according to any one of claims 1 to 5, comprising:

in which the wall (21) of the first cradle (20a) and / or the second cradle (20b) is composite and comprises, superimposed as a whole:

a portion in the form of an outer layer (10) towards the extrados (35) limited on one side by the extrados (35) of the fixed mechanical connection piece (3b) and limited on the other side by a rigid securing interface (13), and

a part in the form of an inner layer (1 1), limited on one side by a rigid connection interface (15) with the rigid connection interface (13) of the outer layer (10) and limited on the other side by the intrados (22),

by means of a cradle (20) / profiled (2) permanent application force, the intrados (22) of the first cradle (20a) and / or the second cradle (20b) is intimately applied to the extrados (8b, 8c) second profile (2b) and / or the third profile (2c), in the manner of a suction cup, thereby participating in the fixed mechanical connection of the fixed mechanical connection parts (3a, 3b, 3c) and the three profiles ( 2a, 2b, 2c).

9. Fixed mechanical connection piece (3c) of the fixed mechanical connection assembly (1) according to any one of claims 1 to 5, comprising:

in which the wall (31) of the first cradle (30a) and / or of the second cradle (30b) and / or of the third cradle (30c) is composite and comprises, superimposed as a whole: - an outer layer-shaped part (10), towards the extrados (36) limited on one side by the extrados (36) of the fixed mechanical connection piece (3c) and limited on the other side by a rigid securing interface (13), and

a part in the form of an inner layer (1 1), limited on one side by a rigid connection interface (15) with the rigid connection interface (13) of the outer layer (10) and limited on the other side by the intrados (32),

with a cradle (30) / profiled (2) permanent application force, the lower surface (32) of the first cradle (30a) and / or the second cradle (30b) and / or the third cradle (30c) is applied from intimate way on the extrados (8a, 8b, 8c) of the first profile (2a) and / or the second profile (2b) and / or the third profile (2c), in the manner of a suction cup, thereby participating in the fixed mechanical connection of the fixed mechanical connection parts (3a, 3b, 3c) and of the three sections (2a, 2b, 2c).

Fixed mechanical connection piece (3a) of the stationary mechanical connection assembly (1) according to any one of claims 1 to 5, comprising:

wherein the intrados (7a, 7b) of the first cradle (5a) and / or the second cradle (5b) has, in cross section, a substantially semicircular shape.

1 1. Fixed mechanical connection piece (3b) of the stationary mechanical connection assembly (1) according to any one of claims 1 to 5, comprising:

wherein the intrados (22a, 22b) of the first cradle (20a) and / or the second cradle (20b) has, in cross section, a substantially semicircular shape.

12. Fixed mechanical connection piece (3c) of the stationary mechanical connection assembly (1) according to any one of claims 1 to 5, comprising:

a third cradle (30c) including a third wall (31c) whose intrados (32c) is adapted to receive, cooperate and come into contact with the extrados (8b) of a longitudinal section (9b) of the second section (2b) wherein the intrados (32a, 32b) of the first cradle (30a) and / or the second cradle (30b) has, in cross section, a substantially semi-circular shape.

a first cradle (5a) including a first wall (6a) whose intrados (7a) is adapted to receive, cooperate and come into contact with the extrados (8a) of a longitudinal section (9a) of the first section ( 2a)

a second cradle (5b) including a second wall (6b) whose intrados (7b) is adapted to receive, cooperate and come into contact with the extrados (8b) of a longitudinal section (9b) of the second section ( 2b), and

a fixed connection (19) between the first cradle (5a) and the second cradle (5b) so that the first cradle (5a) and the second cradle (5b) form together with the fixed connection (19) a piece overall rigid.

Fixed mechanical connection piece (3b) of the stationary mechanical connection assembly (1) according to any one of claims 1 to 5, comprising:

a first cradle (20a) including a first wall (21a) whose intrados (22a) is adapted to receive, cooperate and come into contact with the extrados (8c) of a longitudinal section (9c) of the third section (2c)

a second cradle (20b) including a second wall (21b) whose intrados (22b) is adapted to receive, cooperate and come into contact with the extrados (8b) of a longitudinal section (9b) of the second section (2b), and

a fixed connection (23) between the first cradle (20a) and the second cradle (20b) so that the first cradle (20a) and the second cradle (20b) form together with the fixed connection (23) a piece overall rigid.

15. fixed mechanical connection piece (3a) according to claim 13, wherein the first cradle (5a) has a projection or transverse partition (29) to the fixed connection (19) between the first cradle (5a) and the second cradle (5b), the first section (2a) respectively extending entirely on the same side of the first fixed mechanical connection piece (3a).

16. fixed mechanical connection piece (3b) according to claim 14, wherein the first cradle (20a) has a projection or transverse partition (24) to the fixed connection (23) between the first cradle (20a) and the second cradle (20b), the third section (2c) respectively extending entirely on the same side of the second fixed mechanical connection piece (3b).

17. Fixed mechanical connection piece (3c) of the stationary mechanical connection assembly (1) according to any one of claims 1 to 5, comprising:

a second cradle (30b) including a second wall (31b) whose intrados (32b) is adapted to receive, cooperate and come into contact with the extrados (8c) of a longitudinal section (9c) of the third section (2c) a third cradle (30c) including a third wall (31c) whose intrados (32c) is adapted to receive, cooperate and come into contact with the extrados (8b) of a longitudinal section (9b) of the second section (2b), and

a fixed link (33) between the first cradle (30a) and the second cradle (30b), the fixed link (33) comprising the third cradle (30c) and forming an angle between the first cradle (30a) and the second cradle (30b).

18. Fixed mechanical connection piece (3c) according to the preceding claim, wherein the first cradle (30a) and the second cradle (30b) of the third piece (3c) respectively comprises inside a projection or transverse partition (34a). , 34b) to the fixed link (33), the first profile (2a) and the third profile (2c) extending respectively wholly on the same side of the transverse projection or partition (34a, 34b).

19. Fixed mechanical connection piece (3c) of the stationary mechanical connection assembly (1) according to any one of claims 1 to 5, comprising:

in which the intrados (32c) of the third cradle (30c) has, in cross section, a quarter-circle shape.

20. Fixed mechanical connection piece (3a) of the stationary mechanical connection assembly (1) according to claim 5, comprising:

wherein a positioning protrusion (38a) and a locating hole (38b) are symmetrically formed with respect to the through-hole (37a), extending in the same direction of the through-hole (37a), so that when the first fixed mechanical connection piece (3a) is associated with the third fixed mechanical connection piece (3c), the positioning projection (38a) of the first piece (3a) cooperates with the positioning hole (38b) of the third piece (3c) and vice versa.

21. Fixed mechanical connection piece (3b) of the stationary mechanical connection assembly (1) according to claim 5, comprising:

a first cradle (20a) including a first wall (21a) whose intrados (22a) is adapted to receive, cooperate and come into contact with the extrados (8c) of a longitudinal section (9c) of the third section (2c), and a second cradle (20b) including a second wall (21b) whose intrados (22b) is adapted to receive, cooperate and come into contact with the extrados (8b) of a longitudinal section (9b) of the second section (2b)

wherein a positioning protrusion (38c) and a locating hole (38d) are symmetrically formed with respect to the through hole (37b), extending in the same direction of the through-hole (37b), so that when the second fixed mechanical connection piece (3b) is associated with the third fixed mechanical connection piece (3c), the positioning projection (38c) of the second piece (3b) cooperates with the positioning hole (38d) of the third piece (3c) and vice versa.

22. Assembly of profiles comprising a first profile (2a), a second profile (2b) and a third section (2c) mechanically connected in a fixed manner, possibly removable, by a fixed mechanical connection assembly (1) according to the any of claims 1 to 5.

23. Assembly according to the preceding claim, wherein the first section (2a), the second profile (2b) and the third section (2c) respectively extend along axes (D, E, Z) transverse to each other relative to other.

24. Modular carrier structure comprising a plurality of profiles (2a, 2b, 2c) and one or more fixed mechanical connection assembly (1) according to any one of claims 1 to 5, and / or one or more mechanical connection pieces. fixed device (3a, 3b, 3c) according to any one of claims 7 to 21, the modular bearing structure being perforated, rigid, and being adapted and intended for the realization of functional assemblies with implementation of the production at the fairest ("Lean Manufacturing"), such as shelves, bases (eg for worktop), services, conveyors, guiding devices, "picking", unloading devices, trolleys, wagons, personal work places.

25. A functional assembly for an industrial production or logistics or distribution process with the implementation of lean manufacturing, such as a rack, a base, a service, a conveying device, a guiding device , a picking device, an unloading device, a trolley, a wagon, a workstation, comprising a modular support structure according to claim 24 and one or more specific complementary functional devices, such as receptacles, rails, rollers , stops, slides, wheels, means for driving or moving.