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Title:
JOINING DEVICE, PARTICULARLY FOR JOINING A SHELF TO A WALL OF A PIECE OF FURNITURE
Document Type and Number:
WIPO Patent Application WO/2017/001425
Kind Code:
A1
Abstract:
A joining device (1), particularly for joining a shelf (2) to a wall (3) of a piece of furniture, comprising a cylindrical body (4) that can be associated with a first hole (5) adapted to be provided transversely in the shelf (2). In the joining device (1), the cylindrical body (4) is constituted by a first half-shell and a second half-shell (7a, 7b), which can be mutually coupled axially with front coupling.

Inventors:
CARNELOS, Luca (Via Mas Comun 5, Polcenigo, 33070, IT)
DELLA ROSA, Simone (Via Crosetta 2, Fontanafredda, 33074, IT)
DURIGON, Giulio (Viale Del Tramonto, 4/7, San Vito Al Tagliamento, 33078, IT)
IVAN, Abramo (Via S. Caboto 20, Porcia, 33080, IT)
VERZIAGI, Davide (Via D. Alighieri 76, Fontanafredda, 33074, IT)
ZONTA, Christian (Viale Stazione 8, Sesto Al Reghena, 33079, IT)
Application Number:
EP2016/065050
Publication Date:
January 05, 2017
Filing Date:
June 28, 2016
Export Citation:
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Assignee:
FERRAMENTA LIVENZA - SOCIETA' A RESPONSABILITA' LIMITATA (Viale L. Zanussi 21, Brugnera, 33070, IT)
International Classes:
A47B96/06; F16B12/20
Foreign References:
EP1469206A12004-10-20
EP1793129A12007-06-06
Attorney, Agent or Firm:
MODIANO, Micaela et al. (Modiano & Partners, Via Meravigli 16, Milano, 20123, IT)
Download PDF:
Claims:
CLAIMS

1. A joining device (1), particularly for joining a shelf (2) to a wall (3) of a piece of furniture, comprising a cylindrical body (4) that can be associated with a first hole (5) adapted to be provided transversely in said shelf (2), characterized in that said cylindrical body (4) is constituted by a first half-shell and a second half-shell (7a, 7b), which can be mutually coupled axially with front coupling.

2. The joining device according to claim 1, characterized in that said first half-shell (7a) of said cylindrical body (4) has a substantially cylindrical and internally hollow shape so as to define a first axial seat (8) for the rotatable coupling of the first stem (9) of a screw (10) provided with a first crown-shaped head (1 1) that can be arranged rotatably within a separate second seat (12) that is adjacent to said first seat (8), said first head (11) of said screw (10) not protruding beyond the space occupation of said cylindrical body (4), said second seat (12) being provided proximate to the end (13) cut along a chord so as to define a flat portion (14) of said second half- shell (7b) that is directed toward said first half- shell (7a).

3. The joining device according to claims 1 or 2, characterized in that said second seat (12) is obtained along a plane that is perpendicular to the plane of arrangement of said first seat (8), has a substantially semicircular shape and lies between two partitions (15a, 15b) of which the front one (15a), directed toward said first half-shell (7a), has a semicircular opening (16) for the placement and passage of said first stem (9) along the same axis as said first seat (8).

4. The joining device according to one or more of the preceding claims, characterized in that said first head (11) of said screw (10) protrudes from said second seat (12) and lies below a first tab (17) that protrudes from said first half- shell (7a) in the direction of said second half- shell (7b), said first tab (17) being extended along a circular arc until it surmounts said cut end (13) of said second half-shell (7b) and therefore also said underlying first crown-shaped head (1 1), once it is associated with said second half- shell (7b).

5. The joining device according to one or more of the preceding claims, characterized in that said second half-shell (7b) has, starting from said cut end (13), and so as to surround said opening (16) provided in said front partition (15a), a second tab (25) that protrudes in the direction of said first half-shell (7a) so as to trace a circular arc that is concentric to said first seat (8) so as to arrange itself, during the axial coupling of said first half- shell (7a) with said second half-shell (7b), within said first seat (8) and adjacent to its internal lateral surface, the first end (26) of said first stem (9) of said screw (10) resting rotatably on said second tab (25) and in turn protruding from said first crown-shaped head (11).

6. The joining device according to one or more of the preceding claims, characterized in that said second half-shell (7b) has a third seat (18), which is perpendicular to the axis of said second seat (12), for the temporary coupling of a second stem (20) of a pinion (21) provided with a second head (22) that interacts with said first crown-shaped head (1 1), said second head (22) protruding outside said cylindrical body (4) and being accommodated in a second hole (28) adapted to be provided in said shelf (2).

7. The joining device according to one or more of the preceding claims, characterized in that said second stem (20) of said pinion (21) can be associated selectively and temporarily with said second half-shell (7b), said second stem (20) having an annular groove (23) that is provided proximate to its end and interacts selectively with an annular ridge (24) that protrudes proximate to the end of said third seat (18).

8. The joining device according to one or more of the preceding claims, characterized in that said second head (22) of said pinion (21) protrudes from the outer perimetric surface (19b) of said second half-shell (7b) and from the outer perimetric surface (19a) of said second half-shell (7a), and is accommodated within a fourth seat (27), constituted by said second hole (28) adapted to be provided in said shelf (2) so as to be located internally or substantially flush with the upper surface (29) of said shelf (2), said shelf (2) having a fourth hole (35) adapted to be provided at the wall that lies opposite said upper surface (29).

9. The joining device according to one or more of the preceding claims, characterized in that said second head (22) of said pinion (21) is adapted to provide motion to said first crown-shaped head (11) and also has the extraction prevention or bolt function, locking said first and second half- shells (7a, 7b) within said shelf (2).

10. The joining device according to one or more of the preceding claims, characterized in that means for the engagement of a pressure tool are present on the second upper end (30) of said second head (22) of said pinion (21), said means being constituted by a fifth seat (31) within which it is possible to arrange a tool by pressing.

11. The joining device according to one or more of the preceding claims, characterized in that a third hole (32) is provided transversely in said wall (3) for the interconnection of the third end (34) of said first stem (9) of said screw (10), said first stem (9) having a thread for chipboard or being associable with a bushing (33) arranged within said third hole (32).

Description:
JOINING DEVICE, PARTICULARLY FOR JOINING A SHELF TO A WALL OF A PIECE OF FURNITURE

The present invention relates to a joining device, particularly for joining a shelf to a wall of a piece of furniture.

Currently, Italian utility model no. 262995, filed with application

PN2005U000035 and corresponding EP1793129, is known which claims a joint, for the detachable connection of two structural elements of a piece of furniture that mutually abut at right angles, comprising an accommodation body that can be associated with a first structural element and is adapted to engage a fixing element that can be associated with a second structural element and an actuation element that is arranged in the accommodation body and is adapted to cooperate with the fixing element so as to mutually fix the structural elements; the fixing element comprises a toothed head that is in one piece with a stem of a screw, the head being coupled rotatably within said accommodation body and the screw stem protruding from the accommodation body, the actuation element comprising a crown gear that is adapted to actuate the head in order to screw the screw stem into the second structural element.

This solution suffers drawbacks: a high production and assembly cost is in fact noted, due to the structural complexity of the joint, the need to provide the joint in various sizes/dimensions as a function of the thickness of the panel, the need to use the joint on panels with high minimum thicknesses, a considerable aesthetic impact since the joint exposes the flat edge that must be applied so as to affect one edge of the panel, and the need to provide two holes/seats on the panel for the placement of the accommodation body and of the pin, the execution of which is complicated.

The accommodation body, or cylindrical body, has a cylindrical shape and is divided diametrically into two components, such as a first half-shell and a second half-shell, which must be joined to each other diametrically and along an axis that is perpendicular to the clamping direction, in order to clamp the crown gear and the fixing element: a high degree of clamping might not allow optimum interaction between the gears, while clamping provided with the presence of plays might lead to difficulty in activating the gears due to possible mutual jamming of the teeth.

Furthermore, the fact that the axis of the cylindrical body is perpendicular to the clamping axis of said cylindrical body and the fact that the cylindrical body is divided diametrically into two components entail that tensions develop during use which tend to separate the first half-shell from the second half-shell.

Furthermore, the crown gear and the fixing element are embedded in the accommodation body: in case of maintenance on the crown gear it is necessary to remove the entire accommodation body from the panel and then open, in practice breaking it, the accommodation body in order to access the internal components; in practice, in case of maintenance, it is necessary to replace the entire joint; moreover, the panel is also ruined in this case.

WO 2008/076089 is also known which discloses a solution for obtaining the connection of construction elements such as a panel; this solution comprises a threaded bush and a frame that can be arranged within a hole provided transversely to the panel; inside the frame there is a first screw, provided with a crown-shaped head, which interacts, according to a crown gear-pinion system, with the head of a second screw. Further a solution is shown in which a hole is provided in a panel to allow adjustment of the second screw.

This solution, also, suffers drawbacks: the second screw, once screwed to the frame, is fixed in its position and is no longer removable and therefore it is not possible to perform any maintenance in case of malfunctions or wear.

Furthermore, in this solution the head of the first screw works in contrast with an externally threaded bush that is associated rotatably with a complementary thread provided axially to the frame; if the bush loosens, optimum interaction of the head of the first screw with the head of the second screw is no longer permitted, thus making adjustment unattainable.

A similar remark can be made in relation to the rotatable connection of the second screw to the frame by means of the bush.

This solution is structurally complicated due to the large number of components that constitute the device, requiring a preassembly of the various components to the frame that is long and laborious, furthermore using a spring that is partially pre-compressed.

EP 1469206 is also known which discloses a solution for connecting construction elements such as panels; this solution comprises a threaded bush, an accommodation body or head and a multi- segment, such as a pin, which can be arranged within a hole provided transversely to the panel.

The cylindrical head is extended along an axis that is perpendicular to the axis of the joint and is constituted by a first head part and a second head part; the head accommodates internally a gear shaped like a threaded tube with external teeth, a part constituted by a toothed rim that is provided in annular fashion on the outer surface of a coaxial sleeve, and one end of the pin.

The pin is a multi-segment constituted by: a first stem, provided with a thread adapted to mate with the female thread of the sleeve, which can be arranged within the head, the end of which, shaped like a hexagon, is adapted for mating with an actuation key; a cylindrical central portion, on the lateral surface of which there are smooth zones for the insertion of a positioning key; a second stem provided with a thread adapted for mating with the bush.

This solution, also, is structurally complicated and requires a preassembly of the various components to the head that is long and laborious; moreover, the mating of the first and second head parts also requires high precision, since it is necessary to join them mutually frontally by means of pins and corresponding centering holes, taking care that the toothed rim of the sleeve of the part enters axially in abutment on the undercut portion of the axial seat and meshes radially with the teeth of the gear.

Furthermore, it is observed that the fact of mating the first and second head parts diametrically to each other and along an axis that is perpendicular to the clamping direction entails the generation of tensions, during the use of the invention, that tend to uncouple the first and second head parts.

Moreover, even in this background art document it is observed that maintenance or replacement of the activation element, i.e. of the gear, is long, complicated and laborious, since it requires the complete disassembly of the joint, as the gear must be assembled before inserting the joint in the panel.

Moreover, it is noted that the fact that the part is constituted by a rim shaped like a threaded tube with an external set of teeth that acts as a female thread forces the user to insert in the joint a male element, such as the pin, that must have such a length as to be able to enter, during use, the threaded hole provided in the sleeve of the part and also enter, during use, the bush.

The joint is then fitted partly in one panel and partly in the other panel, giving rise to problems linked to the space occupation of the pin assembled on the panel that limit the possibility to preassemble the parts before the packaging of the panels, in addition to entailing a plurality of assembly operations (at least one per panel).

Finally, it is noted that since the pin is threaded in both ends, during the release of the joint one cannot know in advance whether one will unscrew the sleeve-pin coupling or the bush-pin coupling.

The aim of the present invention is to eliminate the drawbacks noted above, by providing a joining device that is structurally compact, can be used also on panels that have a low thickness and requires, for its installation, limited work on the panel, so as to maximize the utilization of the space generated by the work on the panel to provide the invention.

Within this aim, an object of the present invention is to provide a joining device in which, during its use, the tensions that are generated do not tend to open the cylindrical body.

Another object is to provide a joining device that has a limited impact on the panel and the activation of which is simple and effective over time regardless of the machining tolerances both in the panel and in the joint.

Another object is to provide a joining device on which it is possible to perform maintenance on the activation element rapidly and easily, preserving the integrity of the joint and of the panel.

Another object is to provide a joining device that allows to achieve an optimum activation thereof, compensating the forces that tend to space the gears.

Another object is to provide a joining device the assembly of which to the panel is simple and easy.

Another object is to provide a joining device that has low manufacturing costs and can be provided with usual and known systems.

This aim and these objects and others that will become better apparent hereinafter, are achieved by a joining device, particularly for joining a shelf to a wall of a piece of furniture, comprising a cylindrical body that can be associated with a first hole adapted to be provided transversely in said shelf, characterized in that said cylindrical body is constituted by a first half- shell and a second half-shell, which can be mutually coupled axially with front coupling.

Further characteristics and advantages of the invention will become better apparent from the detailed description of a particular but not exclusive embodiment of the joining device according to the invention, illustrated by way of nonlimiting example in the accompanying drawings, wherein:

Figure 1 is an exploded view of a joining device; Figure 2 is a sectional view of the joining device;

Figure 3 is a view of a detail according to figure 2;

Figure 4 is a side perspective view of the cylindrical body;

Figure 5 is a sectional view of the cylindrical body without the pinion and the screw with crown- shaped head.

In the exemplary embodiments that follow, individual characteristics, given in relation to specific examples, may actually be interchanged with other different characteristics that exist in other exemplary embodiments.

Moreover, it is noted that anything found to be already known during the patenting process is understood not to be claimed and to be the subject of a disclaimer.

With reference to the figures, the reference numeral 1 designates a joining device, particularly for joining a shelf 2 to a wall 3 of a piece of furniture.

The joining device 1 is constituted by a cylindrical body 4, which can be associated within a complementarily shaped first hole 5 that is adapted to be provided transversely in the shelf 2 through part of its thickness.

The cylindrical body 4 is composed of a first half-shell and a second half-shell 7a, 7b which can be mutually coupled axially with front coupling.

The first half-shell 7a has a substantially cylindrical and internally hollow shape, so as to define a first axial seat 8 for the rotary coupling of a first stem 9 of a screw 10 provided with a first crown-shaped head 11.

The first head 1 1 of the screw 10 can be arranged rotatably within a second seat 12 provided proximate to the end 13, cut along a chord so as to define a flat portion 14, of the second half-shell 7b that is directed toward the first half- shell 7a.

The second seat 12 is obtained along a plane that is perpendicular to the plane of arrangement of the first seat 8, has a substantially semicircular shape and lies between two partitions 15a, 15b, of which the front one 15a, directed towards the first half-shell 7a, has a semicircular opening 16 for the placement and passage of the first stem 9, along the same axis as the first seat 8.

Part of the first head 11 of the screw 10 therefore protrudes from the second seat 12 and lies below a first tab 17 that protrudes from the first half- shell 7a in the direction of the second half-shell 7b.

The first tab 17 is extended along a circular arc until it surmounts the cut end 13 of the second half-shell 7b and therefore also the underlying first crown-shaped head 11 of the screw 10, once it is associated with the second half-shell 7b.

A third seat 18 is provided on the second half-shell 7b, at right angles to the axis of the first seat 8 and therefore to the axis of the first stem 9 and starting from the flat portion 14, and is open in a downward region and not connected to the adjacent second seat 12.

The distance between the flat portion 14 and the outer perimetric surface 19a, 19b of the first and second half-shells 7a, 7b is substantially equal to the height of the first head 11 of the screw 10, which thus does not protrude beyond the cylindrical body 4.

It is possible to arrange temporarily in the third seat 18 a second stem 20 of a pinion 21 provided with a second head 22 that protrudes outside the cylindrical body 4 and is adapted to couple kinematically with the first head 11 accommodated in the second seat 12.

The temporary interconnection of the second stem 20 occurs by way of the presence of an annular groove 23, which is provided proximate to its end and interacts selectively with an annular ridge 24 that protrudes proximate to the end of the third seat 18.

A stable temporary coupling of the pinion 21 to the cylindrical body 4 is thus achieved.

The second half- shell 7b has, starting from said cut end 13, and so as to surround the opening 16 provided on the front partition 15a, a second tab 25 that protrudes in the direction of the first half-shell 7a so as to trace a circular arc that is concentric to the first seat 8 so as to arrange itself, during the axial coupling of the first half-shell 7a to the second half-shell 7b, within the first seat 8 and adjacent to its internal lateral surface.

The first end 26 of the first stem 9 of the screw 10, which in turn protrudes from the first crown-shaped head 11 , rests rotatably on the second tab 25.

The second head 22 of the pinion 21 protrudes from the flat portion 14 and is accommodated within a fourth seat 27 constituted by a second hole 28 that is adapted to be provided in the shelf 2, so as to be internal or substantially flush with the upper surface 29 of the shelf 2.

In this manner, the second head 22 of the pinion 21 , in addition to providing motion to the first crown-shaped head 11 of the screw 10, also has the extraction-prevention or bolt function, in that it locks the cylindrical body 4 within the shelf 2.

Means for the engagement of a pressure tool are provided on the second upper end 30 of the second head 22 of the pinion 21 and are constituted by a fifth seat 31 within which it is possible to arrange by pressing a tool such as a screwdriver or a specific tool that operates by pressure.

A third hole 32 is provided transversely in the wall 3 and an internally threaded bushing 33 for interconnection of the third end 34 of the first stem

9 of the screw 10 can be arranged or screwed therein.

The interconnection can also be achieved in a different manner; for example, the first stem 9 can have a thread for chipboard.

A fourth hole 35, axially aligned with the third seat 18, is provided in the lower surface of the shelf 2 that lies opposites the upper surface 29.

In its use, the invention is therefore constituted by a joining device 1 of the concealed type, in that it is entirely accommodated both in the shelf 2 and in the wall 3, only the second hole 28 being visible.

When the first and second half-shells 7a, 7b are axially mutually assembled in order to obtain the closed cylindrical body 4 with the screw 10 inside it, the cylindrical body 4 is inserted in the first hole 5.

Then the pinion 21 is inserted in the second seat 18, through the second hole 28 adapted to be provided in the shelf 2, so as to be locked temporarily to the cylindrical body 4 so as to allow kinematic interaction between the second head 22 and the first head 11.

The rotation imparted to the pinion 21 through the second hole 28 thus allows to screw the first screw 10 to the threaded bushing 33 associated with the wall 3.

It has thus been found that the invention has achieved the intended aim and objects, a joining device 1 having been obtained which is structurally compact, can be assembled rapidly and simply, can also be used on low-thickness panels and requires, for its installation, limited machining on the panel, so as to maximize the utilization of the space generated by the machining on the panel to provide the joining device according to the invention, also avoiding spoiling it.

The described solution, moreover, entails an optimization due to the particular axial coupling between the two half-shells 7a, 7b, since in use the tensions that are generated do not tend to divide the two half-shells 7a, 7b, and entails an optimization of the assembly of the cylindrical body 4 due to the front coupling, which allows quick, easy and simple assembly.

Furthermore, it has a scarce impact on the panel due to its concealed insertion, since the joining device 1 is accommodated entirely both in the shelf 2 and in the wall 3, only the second hole 28 being visible.

Furthermore, it has been observed that the activation of the pinion 21 is simple and effective over time regardless of the machining tolerances both in the panel and in the components of the device; the simple rotation imparted to the pinion 21 through the second hole 28 in fact allows to screw the first screw 10 into the threaded bushing 33 associated with the wall 3.

Furthermore, it has been found that the second head 22 of the pinion 21 also performs the extraction-prevention or bolt function, by way of the fact that the pinion 21 protrudes outside the cylindrical body 4 and is accommodated within the second hole 28 adapted to be provided in the shelf 2, so as to be internally or substantially flush with the upper surface 29 of the shelf 2, thus allowing to lock the cylindrical body 4 within the shelf 2.

Finally, it has been observed that maintenance of the pinion 21 can occur rapidly and easily, since it is simply removable from the cylindrical body 4 through the second hole 28 in which it is accommodated, without having to extract the cylindrical body 4 from the shelf 2, and is equally simply replaceable.

Obviously the invention is susceptible of numerous modifications and variations, all of which are within the scope of the appended claims. The materials used, as well as the dimensions that constitute the individual components of the invention, may of course be more pertinent according to the specific requirements.

The characteristics indicated as advantageous, convenient or the like may also be omitted or be replaced with equivalents.

The disclosures in Italian Patent Application No. 102015000028434 (UB2015A001733) from which this application claims priority are incorporated herein by reference.

Where technical features mentioned in any claim are followed by reference signs, those reference signs have been included for the sole purpose of increasing the intelligibility of the claims and accordingly such reference signs do not have any limiting effect on the interpretation of each element identified by way of example by such reference signs.