ES2697514B2 - ANCHORAGE ASSEMBLY AND HARDWARE SYSTEM TO JOIN FURNITURE PARTS - Google Patents

Description

DESCRIPTION

ANCHORAGE ASSEMBLY AND HARDWARE SYSTEM TO JOIN PARTS OF

PIECE OF FURNITURE

Object of the invention

The present invention relates to an assembly and anchoring system for joining furniture parts comprising at least one anchoring hardware associated with a pair of cylindrical recesses in which two parts of the anchoring hardware are embedded; so that the assembly system is intended to join parts of a piece of furniture that converge in corner areas that normally form an angle of 90 °, noting that the system of the invention can also join adjacent corner areas of the piece of furniture that form other angles different from 90 ° The assembly system of the invention achieves a solid, strong and firm bond between the different parts of the furniture. Furthermore, it is emphasized that the assembly system of the invention allows quick and simple assembly without weakening the corner areas of the furniture parts, contrary to what is conventionally done with other assembly systems in which said corner areas are weakened.

Technical problem to solve and background of the invention

At present, different assembly systems are known for joining furniture parts (such as chipboard panels and other solid materials) comprising at least one anchoring hardware that joins two pieces of furniture that converge in corner areas; so that through the assembly system the furniture can be assembled ensuring the union between the different pieces of furniture.

Assembly systems are exterior (superimposed) and other interior (totally or partially introduced in the bulk of the material of the furniture parts to be joined).

In general, the exterior assembly systems are usually very bulky, breaking the interior aesthetics of the furniture, the anchor consisting of short screws configured to thread the wood material of the furniture parts to be joined, so that due to the parts of the current furniture have little thickness of material, it is not possible to use screws with greater length to ensure the joint with sufficient security, so that said joint is relatively weak.

The interior assembly systems include at least three machining in each pair of furniture parts to be joined: two machining in one of the parts and one machining in the other even part of the furniture; so that this internal assembly system tends to weaken excessively the areas of the furniture parts (boards / pieces) that are intended to be joined, and as a consequence there is a danger of breaking said parts without the possibility of repair, being necessary replace damaged furniture parts with new ones with the consequent increase in the economic cost involved.

Today the most used assembly system is the system that includes an eccentric mechanism that includes two or three components:

- A threaded or expansion nut that is placed in one of the parts of the furniture, highlighting that there are furniture manufacturers that do not include said nut, threading a bolt directly to the material of one of the parts, without taking into account the fragility of the Used materials.

- A bolt that threads into said nut (when included).

- An eccentric that connects with the bolt to make the union.

The three machining are made with different tools, so that a first machining is used to house the nut or failing that to directly screw the bolt; where said first machining is located in proximity to the edge of one of the pieces of furniture to be joined. A second machining is located in the edge of the other even piece to be joined, so that through said second machining the bolt is introduced. And a third machining to accommodate the eccentric that engages with the bolt; where in said third machining the second machining through which the bolt passes. It should be noted that the first machining and the second machining are the ones that weaken the assembly system of the pieces or pieces of furniture to be joined.

On the other hand in current assembly systems, in addition to anchoring hardware, the union of the furniture parts is usually reinforced with spikes or tufts of wood to help the centering, so that it is necessary to leave gaps in the machining to be able to make the assembly more easily, getting an added reinforcement between the parts of furniture joining , due to the weakness created by the machining practiced, with the consequent increase in mechanization in the areas of the pieces of furniture to be joined.

These assembly systems have great complexity and also weaken the corner areas of the furniture parts to be joined, so that during assembly, and even once the joint is made, the furniture parts are broken in said corner areas; which implies having to change the part of damaged furniture for a new one, with the consequent expense that this entails.

Description of the invention

In order to achieve the objectives and avoid the inconveniences mentioned in the previous sections, the invention proposes a system for assembling furniture parts and anchoring hardware to join said furniture parts.

The assembly system comprises at least one anchor hardware associated with cylindrical recesses into which parts of the anchor hardware are inserted; where the cylindrical recesses are located on internal faces of parts of the furniture that converge in corner areas that form an angle between them.

Each anchoring hardware comprises a support and two rotating clamping mechanisms that are inserted into through holes in the support with axial retention of said clamping mechanisms to the support. where inside the cylindrical recesses fit tubular extensions of the support and eccentric heads that are part of the clamping mechanisms; and where the eccentric heads are located in coincidence with an end curved portions that are part of the tubular extensions of the support.

The tightening mechanisms include lateral grooves in which solidary lugs fit the tubular extensions of the support.

The support includes seating areas that are configured to rest on surfaces of the furniture parts; where the tubular extensions start from the support seating areas.

The tightening mechanisms are configured to rotate and move axially within the through holes of the support with a guided coupling formed by the lugs and the lateral grooves; where, during an initial rotation of the clamping mechanisms, parts of the perimeter contour of their eccentric heads penetrate the lateral faces of the cylindrical recesses, initiating an annular incision on the lateral faces of the cylindrical recesses.

During an angular space of the simultaneous rotation and axial displacement of the clamping mechanisms as a continuation of the initiation of the annular incision, the eccentric heads of the clamping mechanisms drag the furniture parts axially for tightening between them in the area corner wherein said axial direction corresponds to the imaginary longitudinal axis of the cylindrical recess of each of the furniture parts.

Each tightening mechanism comprises a cylindrical body and the eccentric head that is attached to one end of said cylindrical body; wherein said eccentric head includes a curved contour perimeter edge that is interrupted by a first discontinuity and a second discontinuity, between which a first tooth with a first sharp edge and a second tooth with a second sharp edge is generated; and where the first tooth is located in an initial zone away from an area of maximum eccentricity of the eccentric head, while the second tooth is located in the area of maximum eccentricity.

The cylindrical body of the clamping mechanism includes in its curved lateral surface the lateral groove comprising a straight section and a helical section; where the straight section of the lateral groove is contained in a plane perpendicular to the generatrices of the curved lateral surface of the cylindrical body.

During the initial rotation of the guided tightening mechanism in the straight section of its lateral groove, the annular incision is generated in the lateral face of the cylindrical recess by means of the two teeth (first and second) of the eccentric head, said housing being housed fully eccentric head in the annular incision, while during the simultaneous rotation and axial displacement of the guided tightening mechanism in the helical section of the lateral groove, axially drag the furniture parts together. The first sharp edge of the first tooth makes a first deep pass of the annular incision, while the second sharp edge of the second tooth makes a second deep pass of the annular incision; where the depth of the second pass is greater than the first pass.

Each through hole in the support comprises an eccentric interior space delimited by a side wall of the tubular extension and an interior space that is a continuation of the eccentric interior space; where in said interior space an end section of the cylindrical body of the clamping mechanism is housed; and where each extreme curved portion is a continuation of the thickest area of the side wall of the tubular extension.

The clamping mechanism includes a first end blind hole and a second end blind hole that are located in opposite end areas; where the second end blind hole is located in an area of confluence of the cylindrical body and the eccentric head of the clamping mechanism.

The annular incision made by the first tooth together with the second tooth at a greater depth, covers an angular amplitude of 180 ° of the lateral face of the cylindrical recess and said annular incision is located in the part closest to lateral edges of the parts of the furniture. in coincidence with the corner areas of said parts of the furniture.

In one embodiment of the invention, the seating areas of the anchor hardware support rest on the internal faces of the furniture parts, while in another embodiment of the invention the seating areas of said support rest on bottoms of recesses. located on the internal faces of the furniture parts.

The anchoring hardware itself comprises a structure as described above, where said hardware basically comprises the support and the two clamping mechanisms with corresponding elements.

It should be noted that with the assembly system of the invention, the use of several components is avoided separately when everything is mounted in a single set of anchoring hardware that does not need to be disassembled or for the assembly or disassembly of the furniture as well as being able to be mounted interchangeably in any of its positions and to be able to join different thicknesses of materials of the pieces (pieces / boards) of furniture with the same system of assembly.

It also stands out that the furniture parts to be joined only carry a machining on each flat internal face of the parts to be joined made with the same tool, preserving a prudential distance to one edge of said parts so as not to weaken the material excessively; so that conventional machining located in the edge of one of the parts (pieces) of furniture is disregarded that in addition to excessively weakening the material is an inconvenience for the professional who does not have automated machinery, becoming a difficult process for him .

Another feature of the assembly system of the invention is that pieces cut at 90 ° and with different angles can be joined, such as 45 °, an option that is not possible with many assembly systems.

Furthermore, with the system of the invention it is possible to insert the anchoring hardware by means of the recess (optional machining) from a certain thickness of the furniture parts (pieces) to be joined so that anchoring hardware is less visible.

With the assembly system of the invention the pins are not necessary for centering because that centering function is done by the assembly system itself. It is also noted that the reinforcement function in addition to not having weakened the material so much when machining, said reinforcement function is achieved by the corner reinforcement of the anchoring bracket support.

It also highlights the ease and speed of assembly, which in a first phase introduces a pair of parts (tubular extensions and eccentric heads) of each anchoring hardware inside the cylindrical recesses of the pieces of furniture to be joined. In a second phase of the assembly, the clamping mechanism is rotated by an angular space between 180 ° and 270 ° (between half and three quarters of a turn), according to the assembly requirement, all this without having previously been necessary to thread or introduce nuts, bolts or other accessories for the union, so it is possibly the fastest assembly system on the market, being able to mount and disassemble as many times as necessary, without losing effectiveness and solidity in the union.

Next, in order to facilitate a better understanding of this descriptive report and forming an integral part thereof, a series of figures are attached in which the object of the invention has been represented by way of illustration and not limitation.

Brief description of the figures

Figures 1a, 1b.- Show views of the assembly and anchoring system for joining furniture parts, object of the invention. The assembly system comprises at least one anchor hardware in combination with cylindrical recesses in which parts of the anchor hardware are embedded; where said cylindrical recesses are located in said parts of the furniture.

Figure 2.- It shows a view of two pieces of furniture that converge in a corner area, where one of the cylindrical recesses located in one of the parts of the furniture stands out.

Figure 3a.- Shows a plan view of one of the cylindrical holes.

Figure 3b.- Shows a sectional view according to section AB of Figure 3a.

Figure 4.- Shows a perspective view of an angular support that is part of the anchoring hardware.

Figures 4a to 4c.- They show different views of the angular support that is part of the anchoring hardware.

Figure 5.- Shows a perspective view of a clamping mechanism that is also part of the anchoring hardware that is part of the assembly system of the invention.

Figures 5a to 5c.- They show different views of the clamping mechanism that is part of the anchoring hardware.

Figures 6 and 7.- Show section views of the assembly system.

Description of an embodiment of the invention

Considering the numbering adopted in the figures, the assembly system for joining furniture parts comprises at least one anchoring hardware 1 associated with a pair of cylindrical recesses 2 in which two parts of the anchoring hardware 1 are embedded; so that the assembly system is intended to join pairs of parts 3, 4 of the furniture that converge in corner areas 18.

The two cylindrical holes 2 are located on internal faces 5, 6 of the two furniture parts 3, 4 which can be boards or pieces of chipboard or other solid materials, so that in said corner areas, the internal faces 5, 6 of the parts 3, 4 of the furniture forms an angle (a) between them.

Each anchoring hardware 1 comprises an angular support 7 and two clamping mechanisms 8 that are inserted in through holes 9 of the angular support 7 which is formed by two branches 7a, 7b that converge at one end at a reinforced junction zone. by a corner reinforcement 7c. It should be noted that said angular support could have a different configuration than the angular one.

The two branches 7a, 7b of each angular support 7 include seating areas 10 that are configured to rest on the internal faces 5, 6 of the parts 3, 4 of the furniture, so that in an embodiment of the invention as shown in Figure 1a, said seating areas 10 rest directly on the internal faces 5, 6 of the parts 3, 4 of the furniture, while in another embodiment such as that shown in Figure 1b, the seating areas 10 of the angular support 7 they rest on bottoms 11a of recesses 11 made on the internal faces 5, 6 of the parts 3, 4 of the furniture.

The seating areas 10 form the same angle (a) formed by the internal faces 5, 6 of the furniture parts 3, 4 in the corner areas 18.

Each clamping mechanism 8 comprises a cylindrical body 12 and an eccentric head 13 attached to one end of said cylindrical body 12; so that said eccentric head 13 includes a perimeter edge of curved contour that is interrupted by a first discontinuity 14 and by a second discontinuity 15 between which a first tooth 16 and a second tooth 23 are generated; where the first tooth 16 is located in an initial zone away from an area of maximum eccentricity of the eccentric head 13.

The first tooth 16 includes a first sharp front edge 16a and the second tooth 23 includes a second sharp front edge 23a.

The first sharp front edge 16a is responsible for initiating an annular incision 17 on a side face 2a of each of the cylindrical recesses 2 during the assembly of the anchoring hardware 1 in the cylindrical recesses 2 located in the furniture parts 3, 4 one; wherein said annular incision 17 is a groove or groove; all of this as will be described later in detail.

The cylindrical body 12 of the clamping mechanism 8 includes in its curved lateral surface a lateral groove 19 comprising a straight section 19a with a circumferential arc path and a helical section 19b of shorter length than the straight section 19a. In one embodiment of the invention, the straight section covers an angular space around 180 °, while the helical section covers an angular space around 100 °.

The straight section 19a is contained in a plane perpendicular to the generatrices of the curved lateral surface of the cylindrical body 12 of the clamping mechanism 8.

On the other hand, each angular support 7 includes two cylindrical tubular extensions 20 which together with the eccentric heads 13 of the clamping mechanisms 8 are configured to fit inside the cylindrical recesses 2 of the furniture parts 3, 4, so that said tubular extensions 20 start from the seating areas 10 of the angular support 7.

Each of the tubular extensions 20 of the angular support 7 includes an eccentric inner space of cylindrical shape that is not coaxial with the outer surface of the tubular extension 20 generating a variation in thickness in the side wall that delimits said eccentric interior space.

Each of the tubular extensions 20 of the angular support 7 further includes an end curved portion 24 which is a continuation of the side wall of the tubular extension 20; wherein the extreme curved portion 24 starts from the area of greater thickness of said side wall; and where an outer surface of the end portion 24 is a continuation of the outer surface of the tubular extension 20 of the angular support 7.

Each eccentric interior space of the tubular extension 20 forms part of the through hole 9 in which the cylindrical body 12 of the clamping mechanism 8 adjusts, the eccentric head 13 which is arranged in coincidence with the respective portion peeking out of said eccentric interior space extreme curved 24 that is part of the tubular extension 20.

In turn, each of the tubular extensions 20 of the angular support 7 includes a radial perforation 25 where a pin 21 is embedded that appears from within the respective through hole 9 of the angular support 7, such a pin 21 fits inside the slot side 19 and guides the clamping mechanism 8 during the rotation of said clamping mechanism 8.

In line with what was said in the previous paragraph and the sets of tubular extensions 20 and clamping mechanisms 8 within the cylindrical recesses 2 being adjusted, during an initial angular space of rotation of the clamping mechanism 8 around 180 °, this it does not advance in its axial direction because the pin 21 is fitted within the straight section 19a of the side groove 19 of the clamping mechanism 8.

On the other hand, when during the rotation of the clamping mechanism 8 the pin 21 fits inside the helical section 19b of the lateral groove 19, then the clamping mechanism 8 rotates and advances axially simultaneously; where a distance (d) (figure 5c) of said axial feed can reach a measurement around three millimeters, without ruling out other measures; and where during the rotation and axial advance of the clamping mechanism 8, it drags each of the parts 3, 4 of the furniture, securing the union of said parts 3, 4 in the corner area 18 where said parts 3, 4 converge.

Each through hole 9 of the angular support 1 comprises the eccentric interior space delimited by the side wall of the tubular extension 20 and an interior space that is a continuation of the first interior space, so that in said interior space an end section of the cylindrical body is housed 12 of the clamping mechanism 8 that includes a first hexagonal end blind hole 22 to be able to rotate said clamping mechanism 8 with a tool and thus be able to fix the assembly of the anchoring hardware 1 to the two furniture parts 3, 4 to secure its connection .

The clamping mechanism 8 includes a second blind hole 22 'hexagonal end located in the confluence zone of the cylindrical body 12 and eccentric head 13; wherein said second end blind hole 22 'is located at one end opposite to another end (where the first end blind hole 22 is located) of the clamping mechanism 8.

In order to carry out the assembly of two furniture parts 3, 4 by means of the assembly system of the invention, part of the situation in which each anchoring hardware 1 is mounted, so that the two anchoring mechanisms 8 are fitted inside of the through holes 9 of the two branches 7a, 7b of the angular support 7 and the lugs 21 are fitted within the lateral grooves 19 of the clamping mechanisms 8.

Starting from this premise, firstly each hardware 1 is mounted in correspondence with the corner area 18 in which the two furniture parts 3, 4 converge with their respective cylindrical recesses 2; wherein in said cylindrical recesses 2 the two tubular extensions 20 of the angular support 7 are introduced together with the eccentric heads 13 of the clamping mechanisms 8 located in the deepest part of the cylindrical recesses 2; and where in this phase of the assembly the zones of greater eccentricity of the eccentric heads 13 are located in coincidence with the end curved portions 24 of the tubular extensions 20, thus conforming a cylindrical configuration that adjusts complementaryly within the cylindrical recesses 2 of the parts 3, 4 of furniture.

Next, each of the clamping mechanisms 8 is rotated, so that during the initial angular space of rotation, the first tooth 16 through its first sharp edge 16a initiates the annular incision 17 on the lateral face 2a of each of the cylindrical holes 2 without axial advance of the clamping mechanism 8; where, during this initial rotation, the clamping mechanism 8 is guided in the straight section 19a of the lateral groove 19. Obviously said annular incision 17 is made thanks to the rotation of the clamping mechanism 8 and its eccentric head 13 which includes the first tooth 16 and the second tooth 23.

In this turning operation of the clamping mechanism 8, the second tooth 23 (with greater eccentricity than the first tooth 16 of the eccentric head 13 is introduced into the annular incision 17 initiated by the first tooth 16, where as the tooth is rotated clamping mechanism 8 its second tooth 23 increases the depth of the section of the annular incision 17 due to the greater eccentricity of the second tooth 23 of the eccentric head 13; where, as the clamping mechanism 8 continues to rotate, the angular space of the annular incision 17 is also extended to 180 °, without discarding other angular spaces.

As the clamping mechanism 8 continues to rotate, a simultaneous axial and rotational displacement is generated thanks to the fact that the pin 21 is now located within the helical section 19b of the lateral groove 19.

During the turning and advancing operation of the clamping mechanism 8 in which the stud 21 is fitted in the helical section 19b of the lateral groove 19 of said clamping mechanism 8, its eccentric head 13 drags each of the parts 3, 4, of the furniture in the axial direction taking as a reference each one of the cylindrical recesses 2, getting on the one hand to fix the assembly of the anchoring hardware 1 more firmly on the cylindrical recesses 2 and on the other hand it is possible to maximize the tightening of each other of furniture parts 3, 4 in its corner area 18; specifically, the tightening is carried out in contact areas 26 of said furniture parts 3, 4 (figures 1a and 1b).

It should be noted that the end curved portions 24 of the tubular extensions 20 prevent pitching and instability of the anchoring hardware 1.

Thus, during the turns of the two clamping mechanisms 8, the assembly and fixing in the corner area of the two furniture parts 3, 4 are progressively secured, first thanks to the eccentricity of the eccentric heads 13 of the mechanisms of press 8 that start the annular incisions 17 on the lateral faces 2a of the cylindrical recesses 2; and second, thanks to the axial advance of the eccentric heads 13 of the clamping mechanisms 8 that axially drag the parts 3, 4 to join them with maximum firmness in the corner area 18, as described above; where said axial advance corresponds to the axial direction of the cylindrical recesses.

Next, the assembly process of each anchoring hardware 1 for carrying out the assembly and joining of the furniture parts 3, 4 materialized by boards and other solid materials, as described above, is described in more detail. referred to above.

to. - The pin 21 being at the beginning of the straight section 19a of the side groove 19, the maximum thickness part of the side wall that delimits each of the tubular extensions 20 must coincide with the maximum eccentricity part of the respective eccentric head 13 of the clamping mechanism 8 so that the assembly of the tubular extension 20 and eccentric head 13 configures a totally cylindrical structure, and thus being able to introduce said assembly by adjusting it inside the cylindrical cage 2 previously made in the furniture parts 3, 4.

b. - Once said assembly has been inserted into the cylindrical recess 2, the clamping mechanism 8 is rotated by means of the respective tool, adjusting it within one of the end blind holes 22, 22 'which said clamping mechanism 8 has in either of its two ends, ensuring that the zone of maximum eccentricity of the eccentric head 13 of the clamping mechanism 8 is no longer facing the curved end portion 24 that starts from the area of greater thickness of the side wall that delimits the tubular extension (20); wherein said eccentric head 13 will come into contact with the lateral face 2a of the cylindrical recess (2) of the furniture part 3 or 4 to be joined.

The first contact of the eccentric head 13 will be made by the first sharp edge 16a of the first tooth 16 that will perform a part of the machining of the annular incision 17, which together with the second tooth 23 will finish making the depth of the annular incision 17, facilitating its machining At the same time that the second tooth 23 is introduced into the annular incision 17 during the 180 ° angular space corresponding to the straight section 19a of the lateral groove 19 where the pin 21 is fitted, the second tooth 23 of the head Eccentric 13 will be fully housed within the section of the annular incision 17 we have just made.

c. - In this situation, the pin 21 is located at the beginning of the helical section 19b of the side groove 19, so that by continuing to turn the clamping mechanism 8, it advances simultaneously in axial direction thanks to the guided coupling between the pin 21 and the helical section 19b of the annular incision 19.

In this way, the clamping mechanism 8 performs an axial displacement within the hole 9 of the tubular extension 20, so that when the second tooth 23 of the eccentric head 13 is inserted into the annular incision 17, it will drag along with said eccentric head (13) to the part 3 or 4 of the furniture to be joined towards the respective seating area 10 of the support 7 by pressing against said seating area 10 and fixing it thereto.

The annular incision 17 made by the first tooth 16 together with the second tooth 23 at a greater depth covers the 180 ° angular amplitude of the lateral face 2a of the cylindrical recess 2, and said annular incision 17 is located in the part closest to the lateral edges 3a, 4a of the furniture parts 3, 4 (boards), that is, where the corner areas converge 18. However, in other embodiments of the invention, the annular incision 17 could also be located in other parts of the side face 2a of the cylindrical recess 2 different from the part closest to the side edges 3a, 4a of the furniture parts 3, 4.

As mentioned above, there are fundamentally two forms of assembly: depending on whether the furniture parts 3, 4 to be joined are cut at 90 ° and other inclinations such as for example 45 °.

When the furniture parts 3, 4 are cut at 90 °, the center of the cylindrical recess 2 of one of the furniture parts to be joined will be the same distance between each seat base 10 and the center of the tubular extension 20 of the angular support 7, while in the other even piece of furniture to be joined will be the same measure with the addition of the thickness of the piece of furniture that is to be joined.

At the time of joining the two pieces of furniture, first of any of the two tubular extensions 20 of the angular support 7 is introduced in the cylindrical recess 2 made in the part 3 of the furniture that is closest to the edge and we will fix it by turning the clamping mechanism 8. Next, the other tubular extension 20 even of the support 7 is introduced into the cylindrical recess 2 of the other part of the even piece of furniture that is furthest from the edge and the clamping mechanism 8 of the same way as the previous one, getting this last part 4 of furniture closer to the other part 3 couple of furniture, joining each other in case there have been gaps 27 between them 3, 4 (figure 6) during assembly and pressing one of the 4 parts against the other part 3 giving security and stability to the union.

When the two furniture parts 3, 4 are cut at 45 ° or other angles other than 90 °, the distance of the cylindrical recesses 2 from the furniture parts to the cuts will have the same measure, which does not maintain an order of assembly , proceeding to carry out the assembly in the same way as in the previous case (regardless of the part of furniture that begins), obtaining the same results of security and stability in the union.

Claims (5)

1. Anchoring hardware for joining furniture parts , comprising an angular support (7) in which two rotating clamping mechanisms (8) are inserted that are attached to said angular support (7) constituted by two branches (7a) and (7b) that form an angle (a) between them and are reinforced in their joint zone by a corner reinforcement (7c); where said branches (7a) and (7b) include seating areas (10) configured to rest on the furniture parts (3, 4) to be joined; characterized in that: - the support (7) includes tubular extensions (20) that integrate extreme curved portions (24) that are a continuation of a part of the side walls that are part of the tubular extensions (20), which start of the seating areas (10) of the support (7); - said tubular extensions (20) comprise eccentric through holes (9) with respect to the perimeter of the tubular extensions (20), where in said through holes (9) the clamping mechanisms (8) are housed; - the clamping mechanisms (8) are connected to the support (7) by some lugs (21) subsequently embedded in radial perforations (25) that are located transversely in the tubular extensions (20); - each clamping mechanism (8) comprises a cylindrical body (12) and an eccentric head (13) with respect to the cylindrical body (12); wherein said eccentric head (13) includes a curved contour perimeter edge that is interrupted by a first discontinuity (14) and a second discontinuity (15) between which a first tooth (16) and a second tooth (23) are generated. ; - the cylindrical body (12) of each clamping mechanism (8) includes in its curved side part a lateral groove (19) comprising a straight section (19a) with a circumferential arc path and a helical section (19b); wherein within said lateral groove (19) the pin (21) that joins the clamping mechanism (8) with the support (7) is subsequently fitted, forming the anchoring hardware (1); where the pin (21) and the lateral groove (19) constitute a guided coupling during the rotation of the clamping mechanism (8); - the clamping mechanism (8) includes a first end blind hole (22) for the rotation of said tightening mechanism (8), and a second end blind hole (22 '); where both holes are located in the opposite extreme areas of the clamping mechanism (8); and where the second end blind hole (22 ') is located in a confluence zone of the cylindrical body (12) and the eccentric head (13) of the clamping mechanism (8). 2. Assembly system for joining furniture parts with the hardware described in claim 1, characterized in that: - the anchoring hardware (1) is associated with cylindrical holes (2) into which parts of the anchoring hardware (1) are inserted; where the cylindrical recesses (2) are located on the internal faces (5, 6) of the parts (3, 4) of furniture to be joined that converge in corner areas (18) that form an angle (a) between them; and where inside the cylindrical recesses (2) the tubular extensions (20) of the support (7) are fitted together with the eccentric heads (13) that are part of the clamping mechanisms (8) that make up the anchoring hardware (1) ); - the first tooth (16) of each eccentric head (13) of the clamping mechanism (8) is configured to initiate an annular incision (17) on a lateral face (2a) of each of the cylindrical recesses (2) during the rotation of the clamping mechanism (8) when said eccentric head is inside the cylindrical recess (2). 3. Assembly system for joining furniture parts according to claim 2, characterized in that the annular incision (17) covers an angular amplitude of 180 ° of the lateral face (2a) of the cylindrical recess (2); wherein said annular incision (17) is located in the part closest to lateral edges (3a, 4a) of the parts (3, 4) to be joined of the furniture in coincidence with the corner areas (18). 4 - Assembly system for joining furniture parts according to any one of the preceding claims 2 or 3, characterized in that the seating areas (10) of the support (7) rest on the internal faces (5, 6) of the parts (3, 4) of the pieces to be joined. 5. Assembly system for joining furniture parts according to any one of the preceding claims 2 or 3, characterized in that the seating areas (10) of the support (7) optionally rest on bottoms (11a) of recesses ( 11) located on the internal faces (5) and (6) of the parts (3) and (4) of the pieces to be joined in order to make the anchoring hardware (1) less visible.