ES2291779T3 - CHAIR SUPPORT WITH SIMPLIFIED ASSEMBLY. - Google Patents

Abstract

A back for chairs, seats or the like with simplified assembly, comprising a rigid support (14), which is fixed by means of engagement elements to uprights (15) that protrude from a frame (11), a body (16a) that supports a padding (16) being applied by snap-together coupling to the rigid support (14), each one of the engagement elements being constituted by a sliding guide (21) in which it is possible to insert a corresponding portion of an upright (15). Positioning studs (26) protrude in a cantilever fashion from the body (16a) that supports the padding (16), and at least one of the studs for each upright (15) is suitable to pass through respective holes (27, 28) formed in the rigid support (14), in the sliding guide (21) of the upright (15) and in the corresponding portion of upright (15) inserted therein. Each one of the uprights (15) has, on the face (29) provided with the corresponding insertion hole (28) for the stud (26), in the region comprised between the hole (28) and the end (30,30a) to be inserted in the guide (21), a portion (31, 31a) that tapers toward the end. The tapering portion (31, 31a) constitutes, when the rigid support (14) is assembled to the body (16a) that supports the padding (16), during the insertion of the upright (15) in its seat, a guide for the head (32) of the stud (26) which forces an axial movement thereof by elastic deformation of the body (16a) that supports the padding (16) until the stud (26) is inserted in its corresponding hole (28) of the upright (15).

Description

Chair backrest with simplified mounting.

The present invention refers to a backrest for chairs, seats or similar with a mount simplified.

As is known, the seats and chairs designed for various applications, such as furniture office, are currently made up of several components, which are mounted well directly in the factory or in the installation location by specialized workers or by the Username.

Normally, the components that constitute the seats and chairs provide joint closure couplings and, especially auxiliary components, for couplings obtained by threaded elements or equivalent couplings.

Currently, even the seats that they have a fairly simple structure obtained by a number Limited components require some expense of time for your mounting.

The work required to assemble resorting to screws is indeed well known.

Apply a screw, especially in positions which are not particularly easy, may in fact lead to some degree of difficulty and in any case, even for expert users, always involves a certain amount of time.

A seat, chair or similar with a mount simplified therefore it has been designed and marketed and it shows in EP-1042976 on behalf of Challenger Gestao and Consultancy Sociedade Unipessoal Limitada; understands components that are applied exclusively by closing action set and are suitable to form at least one surface for Sit down and at least one backup.

The backrest comprises at least one support rigid, which is fixed by first couplings to the uprights that protrude from the frame, and a body that supports a padding layer is applied by closing coupling set to said rigid support.

The seating surface comprises a seat rigid, which is fixed by joint closure coupling to a flat support element; these elements in turn are fixed by joint closure coupling, by seconds hooking elements, to at least two cross members horizontal frame.

Particularly in terms of support, each of the first coupling elements consists of two series of mutually opposite tabs, which are suitable for form as a whole a sliding guide in which it is possible insert a corresponding portion of the stud.

Connector plugs protrude from the bracket rigid, on the right side to be coupled to the body that supports the padded layer, and each pin is provided with a head in mushroom shape, in which grooves are provided for the elastic deformation

Each pin is inserted with an action of joint closure in a corresponding tubular seat formed in the Rigid body.

Positioning cleats protrude from the body which supports the padding layer; each taco is suitable to pass through respective holes formed in the rigid support in a corresponding seat formed by one of said series of tabs and in the corresponding portion of the inserted stud there.

Although it has achieved commercial success considerable while truly solving the problems noted in the prior art, it has been found that the structure described above is susceptible to improvement.

For example, the two components of the backup can be mounted directly only during manufacturing, since that the studs protruding from the padding support body in the assembly must pass both through the support part rigid forming the upright seat and through the upright.

Therefore, necessarily, the insertion of upright in your seat must precede the insertion of the block correspondingly in your seat and accordingly precede assembly of the two components of the backrest.

It is not possible to mount the backrest beforehand regardless of the frame in order to entrust the assembly complete to the provider or user in practice limits the manufacturing flexibility of the seat or chair, since it is much easier to store and sell frames and components that they are complete and preassembled, allowing you to choose variations and colors at will, which have to sell seats or chairs now complete.

The objective of the present invention is to provide a seat, chair or similar whose structure optimizes the advantages derived from the structure cited in EP-1042976, allowing to mount the backrest completely before Mount it in a frame.

Within this objective, an object of the present invention is to provide a backup that is particularly Strong and functional and allow highly ergonomic use.

Another object of the present invention is to provide a backrest that is easy and quick to mount even for employees They have no specific experience.

Another object of the present invention is to provide a backup that can be manufactured at low costs with equipment and conventional systems

This goal and these and other objects that they will be apparent better then they get by a backrest for chairs, seats or similar with a simplified assembly, of the type comprising a rigid support, which it is fixed by means of hook elements to uprights of a frame, a body that supports a padding being applied by joint closure joint to said rigid support, each of said hooking elements being constituted by a guide slider in which it is possible to insert a portion corresponding of an upright, positioning blocks protruding so that they protrude from said body that supports the padding, at least one of said studs for said stud being suitable to pass through respective holes formed on said rigid support, on said sliding guide of the upright and in the corresponding portion of the inserted upright there, said backing being characterized by the fact that each one of said amounts has, on the face provided with corresponding insertion hole for said block, in the region between said hole and the end to be inserted in said guide, a portion that narrows toward said end, said portion that narrows constituting, when said rigid support it is mounted on said body that supports the padding, during the insertion of said upright in its seat, a head guide of said block that forces an axial movement of his by elastic deformation of said body that supports padding until that said block is inserted into the corresponding hole of said upright.

Other features and advantages of this invention will be apparent better from the following detailed description of an example of his realization, illustrated by non-limiting example in the drawings that accompany, in which:

Figure 1 is a perspective view of a seat with a backrest according to the invention;

Figure 2 is a perspective view awakened from the backrest;

Figure 3 is an exploded section view of the backrest;

Figures 4 to 6 are section views of respective successive steps of mounting the backrest on the framework;

Figure 7 is a perspective view awakened from the passage of the initial amount of the backrest in the framework;

Figure 8 is a perspective view of a different embodiment example of a portion of the frame;

Figure 9 is a front view of the portion shown in Figure 8;

Figure 10 is a sectional side view of the portion shown in Figures 8 and 9.

With reference to the figures, a seat is generally designated by reference number 10 and comprises a frame 11 made of metal tube, in which a surface for Sit 12 and a backrest 13 are mounted.

The backrest 13 comprises a rigid support 14 Made of plastic material, which is anatomically profiled and is applied by means of respective coupling elements, described in greater detail then two tubular uprights 15 that protrude from frame 11.

In particular, said coupling elements, in This embodiment example consists of two guides 21 formed in the rigid support 14; each guide is constituted by the set consisting of two series of equidistant tabs 20, which are arranged opposite to a central flat portion longitudinally elongated 20a and protrude from support 14 for form a seat to accommodate the corresponding final portion of a corresponding amount 15.

The equidistant tabs 20 are conveniently flat and perpendicular to the portion central plane 20a.

A padding 16 is applied by close coupling coupling to rigid support 14 and is supported by a body 16a made of plastics, as described with More detail below.

Pins 22 protrude from rigid support 14 of the backrest 13, and are each provided with a head shaped mushroom 23 in which slots 24 are provided that ensure the necessary elastic deformation.

Each of the pins 22 is suitable to be inserted with a pressure closure in a tubular seat corresponding 25 formed in the body 16a that supports the padding 16.

The pins 22 are arranged conveniently in the region of the backrest 14 which is comprised between the positions for the coupling of the two uprights fifteen.

Tacos 26 protrude more than body 16a; the position of two of said studs corresponds to a respective hole  27 formed in the rigid support 14 in each of the corresponding guides 21.

Correspondingly, a hole 28 is formed in each final portion of the uprights 15.

According to the invention, each of the uprights 15, which in this case is tubular, is provided, on face 29 provided with the corresponding hole 28 for insertion of the block 26, in the region between hole 28 and end 30 a be inserted into guide 21, a portion 31 that narrows toward the end 30.

The narrowing portion 31 is provided in this case by means of two parallel grooves in the wall to form a tongue that is deformed to tilt towards the opposite wall, He touches her with his end.

In a different embodiment example, shown in Figures 8 to 10, said narrowing portion, designated by reference number 31a, is obtained by cold forging the end 30a, therefore at a lower cost than the sequence of the two successive processes described above (cut to form a tongue and subsequent bending of the tongue).

In addition, in this embodiment example the end 30a is substantially formed as a cone or rounded as an alternative, to facilitate its insertion in the guide corresponding 21.

In Figures 8 to 10, the final portions Conical are designated by reference number 33.

The portion that narrows, both in the variation 31 and variation 31a, which is arranged on the line center of the shaft of the stud 15 as the hole 28, constitutes, when the rigid support 14 is mounted on the body 16a that supports the padding 16, during the insertion of the post 15 in its seat of guide 21, a guide for head 32 of block 26 that forces a axial movement of yours by elastic deformation of the body 16a which supports padding 16 (as shown in Figure 5) until block 26 (Figure 6) is inserted into its hole corresponding 28 of the amount 15.

The elastic deformation of the body 16a is allowed by the fact that the studs 26 are arranged in regions of said body that protrude from the pins 22

In this way, the rigid support 14 and the body 16a that supports the padding can be pre-assembled before if coupled to frame 11 by inserting the uprights 15 into the guides 21, said insertion occurring in the manner described previously.

In practice, it has been discovered that the following invention completely achieves the objective and the objects pretended.

The seat actually has a structure that optimize the advantages produced by the structure shown in EP-1042976, allowing to mount previously by Complete the backrest before mounting it on the frame.

In addition, the structure is particularly strong. and functional and allows a highly ergonomic use.

Assembly is quick and easy and can be performed even by employees who have no experience specific.

The backrest can be manufactured at a low cost with conventional equipment and facilities.

The present invention is susceptible to numerous modifications and variations, all of them being inside of the scope of the inventive concept.

All details can be replaced by other technically equivalent elements.

The materials used, with the condition of that are compatible with contingent use, as well as dimensions, can be any according to the requirements.

Where the technical elements mentioned in any claims are followed by reference signs, those reference signs have been included for the sole purpose of increase the intelligibility of the claims and so accordingly, such reference signs have no limiting effect on the interpretation of each element identified by example for such reference signs.

Claims (6)

1. A backrest (13) for chairs, seats or the like with simplified mounting, of the type comprising a rigid support (14), which is fixed by means of hook-up elements (15) protruding from a frame (11), a body (16a) that supports a padding (16) being applied by means of joint closure coupling to said rigid support (14), each of said hooking elements being constituted by a sliding guide (21) in which it is possible to insert a portion corresponding of an upright (15), positioning plugs (26) projecting so that they protrude from said body (16a) that supports the padding (16), at least one of said studs for each upright (15) being suitable to pass to through respective holes (27, 28) formed in said rigid support (14), in said sliding guide (21) of the upright (15) and in the corresponding portion of the upright (15) inserted there, characterized by the fact that each one of said amounts (15) has, on the face (29) provided with the corresponding insertion hole (28) for said block (26), in the region between said hole (28) and the end (30) to be inserted in said guide (21), a portion (31) that narrows toward said end, said narrowing portion (31) constituting, when said rigid support (14) is mounted on said body (16a) that supports the padding (16), during insertion of said upright (15) in its seat, a head guide (32) of said block (26) that forces an axial movement thereof by elastic deformation of said body (16a) that supports the padding (16) until said block (26) ) is inserted into its corresponding hole (28) of said post (15). 2. The backrest according to claim 1, characterized in that said narrowing portion (31) in this case is provided by two parallel grooves of the tubular wall of said upright (15), to form a tongue that is deformed to lean toward the opposite wall, which touches its end. 3. The backrest according to claim 1, characterized in that said narrowing portion (31a) is obtained by cold forging the end (30a). 4. The backrest according to claim 1, characterized in that said end (30a) is formed to become conical. 5. The backrest according to claim 1, characterized in that said narrowing portion (31) is arranged in the centerline of the axis of said upright (15), as well as the hole (28) there. The backrest according to claim 1, characterized in that said studs (26) are arranged in regions of said body (16a) that supports the padding (16) that protrude with respect to the joint closure coupling points between said rigid support (14) and said body (16a) that supports the padding (16).