ITMI20120984A1 - MOBILE STRUCTURE - Google Patents

Description

DESCRIPTION

[0001]. Field of invention

[0002]. The present invention relates to a furniture structure.

[0003]. In particular, the present invention refers to a furniture structure such as for example a bookcase, in particular a metal structure capable of supporting even high loads while maintaining a pleasant appearance or aesthetics.

[0004]. With further detail, the present invention refers to a modular and modular furniture structure, obtained by assembling different components and suitable for being quickly disassembled and reassembled in case of modification of the arrangement of the furniture inside the rooms of a building, which example used for public use, such as a library.

[0005]. Precisely for this reason, the need is strongly felt to propose structures for furniture which, while being robust, are capable of substantially concealing structural connecting elements between the various components from the user's view.

[0006]. In particular, the need is strongly felt to have a structure for furniture, for example a bookcase with shelves, which is simple to make and assemble, but which at the same time is sturdy and capable of supporting decorative elements even if they have a weight. equal to or greater than that of the same furniture structure.

[0007]. In greater detail, there is a strong need to create a furniture structure that minimizes the use of coupling elements between the components, such as screws, bolts and above all glues and welds.

[0008]. With even greater detail, the need is strongly felt to create a large-sized furniture structure that is easily adaptable to the construction tolerances of its components or the surface on which it is placed or that adapts to strong temperature variations and consequent deformations generated on the same structure.

[0009]. State of the art known

[0010]. The document GB 900215 A by VERNON CARLOS JACK BLAKE describes a metal box structure that can be used as a collection structure for books, for example in a library. However, this structure is unsuitable for supporting shelving or decorative panels.

[0011]. Document JP 55139135 A shows a furniture structure also of the box-like type obtained from a folded metal sheet. Even in this case, however, the proposed structure is difficult to use for heavy use.

[0012]. The document EP 0426 051 B1 of KYORAKU CO. LTD. shows a box-like structure for a piece of furniture in which walls, a base and a back are coupled to form a compartment. Also in this case not all connections remain hidden from view and above all the structure is not suitable for heavy loads.

[0013]. The document JP 2009-101097 of KOKUYO KK shows a box-like structure having walls, albeit of reduced thickness, capable of making a sturdy assembly.

[0014]. Solution

[0015]. The object of the present invention is therefore to devise a structure for furniture which allows to achieve the requirements listed above and at the same time allows to obviate the drawbacks of the state of the art mentioned herein.

[0016]. This problem is solved by a furniture structure as defined in the attached claim 1 and by a method of assembling a furniture structure according to the attached claim 8.

[0017]. In accordance with a general embodiment of the invention, a furniture structure comprises at least one shoulder having a shoulder body of predefined height. Said shoulder body has at least one wall which delimits said shoulder body. Said shoulder body comprises at least one shoulder slot which forms an opening through said at least one wall, an opening of predefined longitudinal extension and predefined transverse dimension or width.

[0018]. Said furniture structure further comprises a backrest having a substantially plate-like back body having a predetermined thickness transversal to said backrest plate-like body. Said back body comprises at least one back edge suitable for cooperating with said at least one shoulder to form said furniture structure.

[0019]. According to an embodiment, said backrest edge has at least a tenon or tenon portion which comprises a tenon neck and a tenon protrusion. In accordance with an embodiment, said tenon neck has a predefined neck dimension evaluated transversely to said back plate-like body. Said tenon protrusion has a tenon protrusion dimension, evaluated transversely to the back plate-like body, which is greater than said predefined backrest thickness.

[0020]. According to an embodiment, said tenon protrusion has a tenon protrusion dimension, evaluated transversely to the back plate-like body, which is greater than said neck dimension.

[0021]. According to an embodiment, said at least one back tenon is inserted into said shoulder slot by arranging its tenon neck astride said at least one shoulder body wall and bringing said tenon protrusion into undercut with respect to the body of backrest.

[0022]. In accordance with a further general embodiment, a furniture structure comprises a cover panel that connects to at least one furniture shoulder in its opposite surface to that of the shoulder that connects with a backrest. Said shoulder comprises a recess seat which accommodates, by drowning it flush with the edges of the seat, said cover panel.

[0023]. In accordance with an embodiment, said covering panel has a surface facing the shoulder which comprises at least one seat, preferably blind, and a coupling pin is firmly received in said seat having a free end and stop means for elastic means fitted. on said coupling pin to influence an undercut support plate in preload.

[0024]. In accordance with an embodiment, said pin with said plate preloaded by said elastic means are received in a cover panel seat provided in said shoulder having an inlet opening of amplitude capable of receiving pin and plate. In accordance with an embodiment, said opening continues with a panel coupling slot suitable for sliding the shank of said coupling pin but capable of preventing the undercut support plate from coming out which, once inserted in said seat, influences elastically said cover panel abuts against the shoulder to connect the panel to the shoulder, concealing all connection means from view and avoiding the use of perennial fixing means such as glues or welds.

[0025]. According to an embodiment, said cover panel is for example a cover element plate.

[0026]. The solutions described above allow to have an excellent sturdiness but at the same time to adapt the structure to the operating conditions, as well as to the constructive tolerances or to the changes in the environmental conditions.

[0027]. In particular, the solutions described above allow to adapt the furniture structure to the constructive tolerances of the backrest and of the extrusions or box-shaped elements which form the shoulders or the lid structure.

[0028]. Thanks to the provision of play in the couplings between the tenon and the retaining block seat, it is possible to compensate for flatness errors of the support surface even in the case of a considerable extension of the furniture structure, as well as deformations due to different thermal expansions of the components of the structure , as well as deformations due to high loads resting on the structure itself.

[0029]. The proposed solution is particularly suitable for use as shelving in a library, as well as as an office cabinet.

[0030]. Figures

[0031]. Further characteristics and advantages of the furniture structure according to the invention will appear from the following description of its preferred embodiment examples, given by way of non-limiting example, with reference to the attached figures, in which:

[0032]. Figure 1 is a perspective view of an assembly comprising a plurality of furniture structures;

[0033]. Figure 2 shows a perspective view of a step of assembling a furniture structure and in particular the step of coupling a backrest to a shoulder;

[0034]. - figure 3 represents a cross section of a furniture structure, cutting the shoulder to show enlarged only the top where it supports a lid structure, a coupling of a pair of opposing shelves and the base when connected to the base structure;

[0035]. - figure 4 illustrates a cross section of a shoulder with detailed details of the coupling of the backrest, of the connection of the base structure and the height-adjustable support feet;

[0036]. - figure 5 shows a longitudinal section of a pair of furniture structures connected to each other by means of a common shoulder, the base structures and the lid structures, as well as the coupling of the two backrests to the same shoulder;

[0037]. Figure 6 is a perspective view of a detail of a shoulder and of a coupling between a backrest with its undercut tenon with the block seat of a retaining block received in a hollow structure of the shoulder;

[0038]. - figure 7 illustrates a detail in perspective view of the base of a shoulder where there is a support foot adjustable in height and a base structure is firmly connected to the base of the shoulder;

[0039]. Figure 8 shows a perspective view of a detail of the back of a cover panel, here a plate of a covering element, with blind seats in which coupling pins with undercut support plate fitted under elastic means are accommodated;

[0040]. - figure 9 is a perspective view of a detail of an end shoulder with its external surface opposite to that of coupling with the backrest in which seats for the cover panel are obtained, equipped with inlet openings, seat for the pin and plate and panel coupling slot for sliding and settling of the coupling pin shank;

[0041]. - figure 10 represents a front view of a detail of a covering panel, with blind seats in which a coupling pin is accommodated with an undercut support plate fitted, stressed by elastic means when fitted on the shoulder wall;

[0042]. figure 11 shows a side view of the detail of figure 10;

[0043]. - figure 12 shows a cross section corresponding to the axis of the pin of the detail of figure 10;

[0044]. - Figures 13 to 23 show in schematic perspective views different assembly and adjustment phases of a plurality of furniture structures to form a bookcase with shelves in which in particular for each furniture structure one proceeds with the first placement of a shoulder, the coupling of a backrest thanks to the insertion of the undercut backrest tenon in the shoulder slot and optionally in the seat of the retaining block, then proceed with the coupling of the base structure and then continue with the coupling of the opposite shoulder, and then start again until you have coupled all the modules of the furniture structure and finally couple the structures to the lid, and then adjust the height of the exit of the support feet of the shoulders, assemble some of the shelves leaving accessible the base, wire the assembly of furniture structures bringing power where placed for example lighting bodies and then mount the last ones shelves possibly after having re-adjusted the height of the shoulder support feet;

[0045]. - figure 24 shows a perspective view of a detail of the insertion of a backrest tenon in an undercut block seat, highlighting the play present between the parts.

[0046]. Description of some preferred embodiments [0047]. With reference to the aforementioned figures and in accordance with a general embodiment, a furniture structure 1 comprises at least one shoulder 2 having a shoulder body 3 of predefined height H.

[0048]. Said shoulder body 3 has at least one wall 4 which delimits said shoulder body 3. Said shoulder body 3 comprises at least one shoulder slit 5 which forms an opening through said at least one wall 4 of predefined longitudinal extension and predefined transverse dimension or width , indicated with the reference â € œs1â €.

[0049]. In accordance with an embodiment, said furniture structure 1 further comprises a backrest 6 having a substantially plate-like backrest body 7 of predefined thickness â € œrâ € transversal to said backrest plate-like body 7. In accordance with an embodiment, said backrest body 7 comprises at least one backrest edge 8 suitable for cooperating with said at least one shoulder 2 to form said furniture structure 1.

[0050]. According to an embodiment, said backrest edge 8 has at least one tenon or tenon portion 9 which comprises a tenon neck 10 and a tenon protrusion 11.

[0051]. In accordance with an embodiment, said tenon neck 10 has a predefined neck size â € œsâ €, when measured transversely to said backrest plate-like body 7.

[0052]. In accordance with an embodiment, said tenon protrusion 11 has a tenon protrusion dimension â € œRâ € evaluated transversely to the plate-like backrest body 7 which is greater than said predefined backrest thickness â € œrâ €.

[0053]. In accordance with an embodiment, said tenon protrusion 11 has a tenon protrusion dimension â € œRâ € evaluated transversely to the plate-like backrest body 7 which is greater than said neck dimension â € œsâ €.

[0054]. According to an embodiment, said at least one back tenon 9 is inserted in said shoulder slot 5 by arranging its tenon neck 10 astride said at least one shoulder body wall 4 and carrying said tenon protrusion 11 undercut with respect to the backrest body 7.

[0055]. According to an embodiment, the furniture structure 1 further comprises a retaining block 12 having a retaining block body 13 which forms a block seat 14. According to an embodiment, said block seat 14 comprises a block slot 15 which faces the outside of the retaining block 12. Said block slot 15 has a transversal dimension â € œs2â € substantially equal to the width â € œs1â € of the shoulder slot 5. According to a shape embodiment, said block seat 14 further comprises an undercut space of block 16 having a transversal dimension of space â € œs3â € greater than said transversal dimension â € œs2 of block slot 15.

[0056]. According to an embodiment, said retaining block 12 is constrained to said shoulder 2 by facing and aligning said block slot 15 to said shoulder slot 5 on the opposite side to the at least one shoulder body wall 5 with respect to backrest body 7 to receive in said block slot 15 a portion of said tenon neck 10 and to receive in said block undercut compartment 16 said tenon protrusion 11 to constrain said backrest 6 to said shoulder 2.

[0057]. According to an embodiment, said tenon protrusion 11 has a tenon protrusion dimension â € œRâ € when evaluated transversely to the back plate body 7 which is greater than the transverse dimension â € œs2â € of block slot 15.

[0058]. According to an embodiment, said tenon neck 11 is received in said shoulder slot 5 of said at least one shoulder body wall 4 with clearance.

[0059]. According to an embodiment, said tenon neck 11 is received in said block slot 15 of said block seat 16 with play.

[0060]. According to an embodiment, said tenon protrusion 11 is received in said undercut space of block 16 with clearance.

[0061]. According to an embodiment, said shoulder slit 5 extends over the entire shoulder height â € œHâ € of said shoulder 2.

[0062]. According to an embodiment, said backrest edge 8 of said backrest body 7 is geometrically coupled with play with said shoulder slot 5 for its entire length.

[0063]. In accordance with an embodiment, said backrest tenon 9 is formed by a plate-like backrest body protrusion 17 to which at least two tenon blocks 18 are firmly fixed, for example by welding, and on opposite sides.

[0064]. According to an embodiment, said backrest body 7 is obtained from a plate, for example metal, for example in steel or steel alloy, by laser cutting.

[0065]. According to an embodiment, said shoulder 2 is made of a first material, said back 6 is made of a second material and said retaining block 12 is made of a third material.

[0066]. According to an embodiment, said back 6 and said retaining block 12 are made of the same material.

[0067]. According to an embodiment, said shoulder 2 is made of aluminum or an aluminum alloy, said back 6 is made of steel or a steel alloy and said retaining block 12 is made of steel or an alloy of steel.

[0068]. In accordance with an embodiment, a furniture structure 1 comprises two opposite sides 2 which are identical or specular to each other suitable for coupling with an interposed backrest 6 to form a module of the furniture structure.

[0069]. In accordance with an embodiment, a base structure 20 is included, placed at the base and firmly connecting the base of said opposite shoulders 2 to form a furniture structure module.

[0070]. In accordance with an embodiment, said backrest body 7 has at least a second backrest edge 21, substantially orthogonal to said backrest edge 8 which cooperates with shoulder 2, and located at the base of said backrest 6.

[0071]. In accordance with an embodiment, said backrest body 7 has at least a third backrest edge 25 substantially orthogonal to said backrest edge 8 which cooperates with the shoulder 2 placed at the top of said backrest 6.

[0072]. According to an embodiment, said second backrest edge 21 is delimited by opposite surfaces of backrest plate 22, 23. According to an embodiment, said base structure 20 cooperates with said second backrest edge 21 by tightening packaged said opposite surfaces of back plate 22, 23.

[0073]. In accordance with an embodiment, said base structure 20 comprises at least one pair of base beams 26 of prevailing length and bent ends 27. Said beam 26 rests and tightens as a pack, with the opposite beam arranged on the opposite side of the backrest, the backrest 6 itself and with its beam ends 27 is firmly connected to the shoulder 2.

[0074]. In accordance with an embodiment, said backrest 6, with its backrest tenons 9 placed as an extension of the third backrest edge 25 placed above, is connected to said opposite shoulders 2 and said opposite shoulders 2 are connected to each other in proximity to their base through said base beams 26 forming a modular structure closed at the top and bottom.

[0075]. In accordance with an embodiment, said furniture structure 1 further comprises a lid structure 19, supported by said shoulders 2.

[0076]. According to an embodiment, said structure has a longitudinal lid seat 24.

[0077]. According to an embodiment, said third backrest edge 25 is delimited by opposite surfaces of backrest plate 22, 23, and said lid structure 19 cooperates with said third backrest edge 25 which is received at least partially in said seat longitudinal cover 24.

[0078]. According to an embodiment, said shoulder 2 is made as a hollow box-like structure, for example as an extrusion, or as a plurality of extrusions connected to each other. According to an embodiment, said retaining block 12 is housed in said hollow structure, hiding from view the connection with the backrest tenon 9.

[0079]. According to an embodiment, the shoulder 2 comprises at least one support foot 28 adjustable in extension from the shoulder 2 to adjust the height of the shoulder 2 from a support surface 29, for example a floor of a building.

[0080]. According to an embodiment, each shoulder 2 comprises at least two support feet 28 adjustable in extension from the shoulder 2. According to an embodiment, said at least two support feet 28 are placed at the opposite ends of the base of the shoulder 2 and allow with their adjustment to raise the shoulder and with it the entire furniture structure 1 from the support surface 29, for example to compensate for construction tolerances or deformations due to the load supported by the furniture structure or thermal deformations of the furniture structure .

[0081]. In accordance with a general embodiment, a furniture structure 1 comprises a covering panel 30 connected to at least one shoulder 2 in the surface of said shoulder which is opposite to the backrest 6.

[0082]. In accordance with an embodiment, said shoulder comprises a recess seat 31 which accommodates, by drowning it flush with the edges of the recessed seat 31, said cover panel 30.

[0083]. According to an embodiment, said cover panel has a surface facing the shoulder or rear which comprises at least one seat 32, preferably a blind seat.

[0084]. According to an embodiment, a coupling pin 33 is firmly received in said seat having free end 34 and stop means for elastic means 35 fitted on said coupling pin to influence an undercut support plate 36 in preload. In accordance with an embodiment, said pin 33 with said plate 36 preloaded by said elastic means 35 is received in a cover panel seat 37 provided in a wall of said shoulder 2. Said cover panel seat 37 has a inlet opening 38 of amplitude capable of receiving pin 33 and plate 36. According to an embodiment, said opening 38 continues with a panel coupling slot 39 suitable for sliding the stem of said coupling pin 33 but which prevents exit of the undercut support plate 36 which, inserted in said seat 37, elastically influences said covering panel 30 in abutment against the shoulder 2 to connect the panel 30 to the shoulder 2 and hide any connection means from view, avoiding the use of perennial fastening means such as glues or welds.

[0085]. According to an embodiment, said cover panel is a cover element plate 30.

[0086]. In accordance with a general embodiment, the shoulder 2 comprises at least a series of anchoring means 40 of support hooks for shelves 41.

[0087]. In accordance with an embodiment, said anchoring means 40 comprise a rack received in a track 42 inside the shoulder 2 but facing with anchoring slots 43 of the rack to a track slot 44 through which hooks for supporting shelves 41 are they insert and couple with said anchoring slots 43 to support a shelf 41 at the predetermined height.

[0088]. In accordance with an embodiment, a pair of opposite shoulders 2, fastened by a backrest 6 and a base structure 20, form a structure of a bookcase to which a plurality of shelves 41 are attached.

[0089]. According to an embodiment, said backrest is made of steel sheet having a thickness between 1mm and 4mm, preferably 2mm.

[0090]. In accordance with an embodiment, said retaining block 12 is made of steel and forms a block seat with a height of between 20mm and 700mm, preferably between 30 and 100mm to undercut the tenon protrusion 11 of the backrest 6.

[0091]. The steps of a method of assembling a furniture structure will be described below. This method includes the steps of:

[0092]. - providing a furniture structure 1 as described above;

[0093]. - arranging a shoulder 2 vertically resting on a support surface 29;

[0094]. - insert an undercut back tenon 9 into a shoulder slot 5.

[0095]. In accordance with an embodiment, said method further comprises the steps of:

[0096]. - at least partially insert a backrest edge 8 into a shoulder slot 5.

[0097]. According to an embodiment, said method comprises the further steps of:

[0098]. - arrange a second opposite shoulder 2 facing the first e

[0099]. - undercut an opposite backrest tenon 9 provided at the opposite end of the backrest 6 in a shoulder slot 5 of the opposite shoulder 2.

[00100]. According to an embodiment, said method comprises the further steps of:

[00101]. - at least partially inserting an opposite backrest edge 8 into an opposite shoulder slot 5 of the opposite shoulder 2.

[00102]. According to an embodiment, said method comprises the further steps of:

[00103]. - before undercutting the opposite backrest tenon 9 into the shoulder slit 5 of the opposite shoulder 2, connect a base structure 20 to the base of the first shoulder 2, tightening the backrest 6 as a package.

[00104]. According to an embodiment, said method comprises the further steps of:

[00105]. - connect the opposite shoulder 2 to the opposite end of the base structure 20 e

[00106]. - placing a lid structure 19 on the opposite shoulders by fitting the longitudinal lid seat 24 onto the backrest edge.

[00107]. In accordance with a general embodiment, the mounting method comprises the steps of:

[00108]. - insert the at least one coupling pin 33 and the undercut support plate 36 protruding from the rear of a covering panel 30 into an inlet opening 38 of a cover panel seat 37 provided in an end shoulder of a furniture structure;

[00109]. - hook the support plate 36 to the undercut of the wall of a shoulder body 3 by sliding the stem of the coupling pin along the panel coupling slot.

[00110]. According to an embodiment, said method comprises the further steps of:

[00111]. - recess the cover panel 30 in the recess seat 31 of the shoulder 2.

[00112]. According to an embodiment, said method comprises the further steps of:

[00113]. - insert the at least one coupling pin 33 and the undercut support plate 36 protruding from the rear of a cover panel 30 into an inlet opening 38 of a cover panel seat 37 provided in a cover structure a furniture structure;

[00114]. - hook the support plate 36 to the undercut of the wall of a cover structure body by sliding the stem of the coupling pin along the panel coupling slot and

[00115]. - embed the cover panel 30 in the recess seat of the cover structure.

[00116]. Obviously, a person skilled in the art, in order to satisfy contingent and specific needs, can make numerous modifications and variations to the furniture structure according to the invention, all of which are however contained within the scope of protection of the invention, as defined by the following claims.

REFERENCES furniture structure

shoulder

I cover my shoulder

shoulder body wall

shoulder cleft

back

back body

backrest edge

backrest tenon

neck id tenon

protrusion of tenon

retaining block

retaining block body

block seat

block slot block undercut compartment protrusion of back body tenon blocks

lid structure

base structure

second backrest edge backrest plate surface opposite backrest plate surface longitudinal seat of cover third backrest edge

base beam

beam end support foot adjustable in height support surface cover panel â € stone â € cover element seat for recess

seat cover panel coupling pin free end and stop

elastic means

undercut support plate seat of cover panel seat inlet opening

panel coupling slot

0 anchoring means for support hooks of shelves 1 shelf

2 rail for rack

3 anchoring slots

4 rail slot for rack

H shoulder height

1 shoulder slit width

2 block slot width

3 compartment width with block undercut

r back thickness

s tenon neck size

R protrusion dimension of tenon

Claims (10)

CLAIMS 1. Furniture structure (1), comprising: at least one shoulder (2) having a shoulder body (3) having predefined height (H), said shoulder body (3) having at least one wall (4) which delimits said shoulder body (3); said shoulder body (3) comprising at least one shoulder slot (5) forming an opening through said at least one wall (4) of predefined longitudinal extension and predefined transverse dimension or width (s1); said furniture structure (1) further comprising a backrest (6) having a substantially plate-like back body (7) of predefined thickness (r) transversal to said backrest plate-like body (7); said backrest body (7) comprising at least one backrest edge (8) adapted to cooperate with said at least one shoulder (2) to form said furniture structure (1); in which said backrest edge (8) has at least a tenon or tenon portion (9) which comprises a tenon neck (10) and a tenon protrusion (11); and in which said tenon neck (10) has a predefined neck size (s) evaluated transversely to said back plate-like body (7); and in which said tenon protrusion (11) has a tenon protrusion dimension (R) transversal to the backrest plate-like body (7) greater than said predefined backrest thickness (r); and in which said tenon protrusion (11) has a tenon protrusion dimension (R) transversal to the backrest plate-like body (7) greater than said neck dimension (s); and in which said at least one backrest tenon (9) is inserted in said shoulder slot (5) by arranging its tenon neck (10) astride said at least one shoulder body wall (4) and carrying said protrusion of tenon (11) undercut with respect to the backrest body (7). Furniture structure (1) according to claim 1, wherein a retaining block (12) having a retaining block body (13) forming a block seat (14) is further included, said block housing (14) comprising a block slot (15) which faces the outside of the retaining block (12), said block slot (15) having a transversal dimension (s2) substantially equal to the width (s1) of the slot of shoulder (5), said block seat (14) further comprising an undercut space of block (16) having a transversal dimension of space (s3) greater than said transversal dimension (s2) of block slot (15), said block retainer (12) being constrained to said shoulder (2) facing and aligning said block slot (15) to said shoulder slot (5) on the opposite side to the at least one shoulder body wall (5) with respect to the body of backrest (7) to receive in said slot a block (15) a portion of said tenon neck (10) and to receive in said block undercut space (16) said tenon protrusion (11) to constrain said backrest (6) to said shoulder (2), wherein said tenon protrusion (11) has a tenon protrusion dimension (R) transversal to the backrest plate-like body (7) greater than said transversal dimension (s2) of block slot (15), and / or in which said tenon neck (11) is received in said shoulder slot (5) of said at least one shoulder body wall (4) with clearance, and / or in which said tenon neck (11) is received in said block slot (15) of said block seat (16) with clearance, and / or in which said tenon protrusion (11) is received in said block undercut compartment (16) with clearance, and / or in which said shoulder slit (5) extends for the entire shoulder height (H) of said shoulder (2), and / or in which said backrest edge (8) of said backrest body (7) is geometrically coupled with play with said shoulder slot (5) for its entire length. Furniture structure (1) according to any one of the preceding claims, wherein said backrest tenon (9) is formed by a backrest plate-like body protrusion (17) to which they are firmly fixed, for example by welding, and on opposite sides at least two tenon blocks (18), and / or in which said backrest body (7) is obtained from a plate for laser cutting, and / or in which said shoulder (2) is made of a first material, said backrest (6) is made of a second material and said retaining block (12) is made of a third material, and / or in which said backrest (6) and said retaining block (12) are made of the same material, and / or in which said shoulder (2) is made of aluminum or an aluminum alloy, said back (6) is made of steel or a steel alloy and said retaining block (12) is made of steel or a steel alloy. 4. Furniture structure (1) according to any one of the preceding claims, in which two opposite sides (2), identical or specular to each other, suitable for coupling with an interposed backrest (6), are included, and / or in which a base structure (20) placed at the base and firmly connecting the base of said opposing shoulders (2) to form a furniture structure module, and / or in which said backrest body (7) has at least a second backrest edge (21) substantially orthogonal to said backrest edge (8) which cooperates with the shoulder (2) placed at the base of said backrest (6); and / or in which said backrest body (7) has at least a third backrest edge (25) substantially orthogonal to said backrest edge (8) which cooperates with the shoulder (2) placed at the top of said backrest (6), and / or in which said second backrest edge (21) being delimited by opposite surfaces of backrest plate (22, 23), and in which said base structure (20) cooperates with said second backrest edge (21) by tightening in packet said opposite surfaces of back plate (21), and / or in which said base structure (20) comprises at least one pair of base beams (26) of prevalently length and bent ends (27), in which said beam (26) rests and tightens the backrest (6) and with its beam end (27) is firmly connected to the shoulder (2), and / or in which, said backrest (6), with its backrest tenons (9) placed as an extension of the third edge of the backrest (25) placed above, connects to said opposite shoulders (2) and said opposite shoulders (2) are connected to each other in proximity to their base through said base beams (26) forming a closed structure above and below, and / or in which, said furniture structure (1) further comprises a lid structure (19), supported by said shoulders (2), said structure having a longitudinal lid seat (24), and / or in which said third backrest edge (25) being delimited by opposite surfaces of backrest plate (22, 23), and in which said lid structure (19) cooperates with said third backrest edge (25) which is received at least partially in said longitudinal seat of lid (24), and / or in which said shoulder (2) is made as a hollow box-like structure, for example as an extrusion or plurality of extrusions connected to each other and in which said retaining block (12) is received in said hollow structure, hiding from view the connection with the back tenon (9). Furniture structure (1) according to any one of the preceding claims, wherein the shoulder (2) comprises at least one support foot (28) adjustable in extension from the shoulder (2) to adjust the height of the shoulder (2) from a support surface (29), for example a floor of a building, and / or in which each shoulder includes at least two support feet (28) adjustable in extension from the shoulder (2) and / or in which said at least two support feet (28) are placed at the opposite ends of the base of the shoulder (2) and allow with their adjustment to lift the shoulder and with it the entire furniture structure (1) from the support surface (29), compensating for construction tolerances or deformations due to the load supported by the furniture structure or thermal deformations of the furniture structure. Furniture structure (1) according to any one of the preceding claims, in which a cover panel (30) is connected to at least one shoulder (2) in its surface opposite the backrest (6), and / or in which said shoulder comprises a recessed seat (31) which accommodates said cover panel (30) by drowning it flush with the edges of the seat, and / or in which said cover panel has a surface facing the shoulder comprising at least one seat (32), preferably blind, in said seat a coupling pin (33) having a free end (34) and stop means for elastic means (35) is firmly received ) fitted on said coupling pin to influence an undercut support plate (36) in preload, in which said pin (33) with said plate (36) preloaded by said elastic means (35) are received in a seat of the panel cover (37) provided in said shoulder (2) having an inlet opening (38) of amplitude capable of receiving pin (33) and plate (36), said opening (38) continuing with a suitable panel coupling slot (39) to make the shank of said coupling pin (33) slide but preventing the undercut support plate (36) from coming out which, when inserted in said seat (37), elastically influences said covering panel (30) against the shoulder (2 ) And connecting the panel (30) to the shoulder, hiding all means of connection from view and avoiding the use of perennial fastening means such as glues or welds, and / or in which said cover panel is a sheet of covering element (30). Furniture structure (1) according to any one of the preceding claims, wherein the shoulder (2) comprises at least a series of anchoring means (40) of support hooks for shelves (41), and / or in which said anchoring means (40) comprise a rack received in a track (42) of the shoulder (2) and facing with its anchoring slots (43) to a track slot (44) through which bracket support hooks (41 ) are inserted and coupled with said anchoring slots (43) to support a shelf (41) at the predetermined height, and / or in which a pair of opposing shoulders (2) fastened by a backrest (6) and a base structure (20) form a structure of a bookcase to which a plurality of shelves or shelves (41) are attached, and / or in which said backrest is made of steel sheet having a thickness between 1mm and 4mm, preferably 2mm, and / or in which said retaining block (12) is made of steel and forms a block seat with a height of between 20mm and 700mm, preferably between 30 and 100mm to accommodate the protrusion of the tenon (11) of the backrest (6) in an undercut. 8. Method of assembling a furniture structure, which includes the steps of: providing a furniture structure (1) according to any one of claims 1 to 7, arrange a shoulder (2) vertically resting on a support surface (29); fitting an undercut back tenon (9) into a shoulder slot (5); at least partially insert a backrest edge (8) into a shoulder slot (5). 9. Method for assembling a furniture structure according to claim 8, which includes the further steps of: arranging a second opposed shoulder (2) facing the first and undercut an opposite backrest tenon (9) provided at the opposite end of the backrest (6) in a shoulder slot (5) of the opposite shoulder (2) and at least partially insert an opposite edge of the backrest (8) in a opposite shoulder slit (5) of the opposite shoulder (2), and / or in which the further phases of before undercutting the opposite backrest tenon (9) into the shoulder slot (5) of the opposite shoulder (2) connect a base structure (20) to the base of the first shoulder (2), tightening the backrest (6), and / or in which the further phases of the opposite shoulder (2) is connected to the opposite end of the base structure (20) and a lid structure (19) rests on the opposite shoulders, fitting the longitudinal lid seat (24) onto the backrest edge. 10. Method of assembling a furniture structure according to claim 8 or 9, wherein the further steps of insert the at least one coupling pin (33) and the undercut support plate (36) protruding from the back of a cover panel (30) into a seat entry opening (38) of a cover panel seat ( 37) provided in an end shoulder of a furniture structure, hook the support plate (36) to the undercut of the wall of a shoulder body (3) by sliding the stem of the coupling pin along the panel coupling slot, embed the cover panel (30) in the recess seat (31) of the shoulder (2), and / or in which the further steps of insert the at least one coupling pin (33) and the undercut support plate (36) protruding from the back of a cover panel (30) into a seat entry opening (38) of a cover panel seat ( 37) provided in a lid structure of a furniture structure, hook the support plate (36) into the undercut of the wall of a lid structure body by sliding the stem of the coupling pin along the panel coupling slot, recess the cover panel (30) in the recess seat (of the cover structure.