The invention of the present application relates to insulating plates in a friable material being fastened to wall partitions. In fact, the invention comes from the problem of the insulation of walls through outside. Solutions to such problem are already numerous . They are not all implemented in an easy way and are not of a reasonable cost. And that is why the Applicant had the idea of a new solution, through a simple nailing .

The friable character of the material of the insolating plates of the present application is in fact a little restrictive. The material being provided here is in reality a material being able to be pierced or perforated with a nail or screw type element. It is thus more generally a low density material which might be cellular, even be a fiberboard .

To be simple, further on in the text of the present application, the material being considered will continue to be defined as friable or soft.

But the invention also extends beyond the single insulating plates. They could be other building accessories, as for example chutes and other electrician's rods, all those elements to be fastened to a wall being provided with a face supposed to come into contact with a wall receiving side.

Thus, the invention first relates to a method for fastening to a wall an element to be fastened in a soft material, wherein the element to be fastened is adapted to come into contact through one side with a wall receiving side,

- the contact side of the element to be fastened is coated with a clinging coating,

- the clinging portion nails are driven into the wall receiving side, - the plate is applied against the wall until the element contact side to be fastened comes into contact with the wall receiving side, and

- the nails of the wall are driven into the element to be fastened and cling to its clinging coating.

Preferably, the clinging of the element to be fastened to the wall occurs through clipping.

Advantageously, the nails are driven at regular intervals .

Preferably, the element to be fastened is an insulating plate.

Still preferably, the clinging coating is a meshed coating. But it could also be a solid perforable coating as a film .

The invention also relates to an assembly consisting in an element to be fastened in a friable or soft material and a wall to which the latter is fastened by clinging, nails with a clinging portion being driven into the wall and the element to be fastened being coated with a clinging coating to which the nails being driven into the element are clung.

The clinging coating may be fitted on the element to be fastened by any appropriate means. It can be glued, or even inserted therein. It can be a net, a grid, for example in glass fibers, if it is meshed, a film if it is solid and perforable.

The invention also relates to the intermediate products of the assembly like the element to be fastened to the clinging coating as well as the clinging nail, which is indispensable to the implementation of the fastening method of the invention.

Thus, the nail of the invention is characterized in that it comprises:

- an anchoring (nailing) portion,

- an clinging portion, and

- exclusive driving means . The so-called exclusive driving means are means being provided to cooperate with a mass of an indirect firing fastening tool and without the mass driving action being able to damage the nail clinging end.

Advantageously, the driving means comprises a nail propulsion collar separating the two nailing and clinging portions from the nail.

Preferably, the clinging portion comprises at least a fin being open towards the nailing end, preferably one plurality of fins, to be able to provide clinging on different points of the nail clinging portion so as to take the irregularities of the wall receiving side into account .

Finally, the present application also wishes to protect a mass for an indirect firing fastening tool for driving the nail of the invention, with which it forms obviously a same inventive concept, as well as with the above mentioned fastening and assembling method.

Indeed, as the clinging portion of the nail cannot be damaged, the Applicant proposes a driving mass for an indirect firing fastening tool, comprising a head and a rod the end of which comprises an axial groove providing a tubular half-skirt for reception and protection of the nail clinging portion, and the free end slice is arranged to be used as a propulsion hammer.

The objects of the present application will be best comprised through the following description of the method for fastening an insulating plate and assembling such plate and one wall, the clinging nail and the mass being adapted for driving the nail of the application, referring to the accompanying drawing, wherein :

- Fig. 1 represents a perspective view of a clinging nail according to the invention;

- Fig. 2 represents a perspective view of a mass of an indirect firing fastening tool for propelling clinging nails, according to the invention; - Fig. 3 represents a perspective view of the mass of Fig. 2 with a clinging nail of the invention being ready to be propelled by the mass, and

- Fig. 4 is a perspective view of a wall to be covered with an insulating plate upon plate fastening.

A nail 1 with a clinging end, being used to fasten an insulating plate in a friable material to a wall, will now be described, the insulating plate being only an example of an element to be fastened to the wall .

The nail 1 comprises two portions in the extension of each other, a point-shaped anchoring or nailing portion 2, like a conventional nail, and a clinging portion 3, the two portions being separated by a propulsion collar 4.

The collar 4 is under the shape of a nail head which, instead to be solid, is here annular and on which will bear the slice of a fastening tool mass, as further mentioned, precisely to drive or propel the nail into a wall adapted to receive insulating plates in a friable material, as also be detailed further on.

The clinging portion 3 of the nail 1 comprises, along a rod 7 extending the point 2, a plurality of clinging fins 5, 6. These are small frustoconical elements 5 being opened towards the collar and the point, the last clinging element 6, at the end of the clinging portion, being conical itself. The reason of the presence of a plurality of clinging fins will be explained further on.

The clinging nails of the invention can be driven into a wall adapted to receive here an insulating plate according to the invention with a so-called indirect firing fastening tool, the combustion gasses generated by the firing acting not directly on the fastening element, namely the nail, but through a driving mass. Such fastening technigue is well known of people skilled in the art.

The mass 10 of Figs. 2 and 3 comprises conventionally a head 11 and a rod 12. It is on the head 11 that the combustion gasses react, being generated either by the percussion of a powder cartridge or by the firing of a gas and air mixture. And it is through the rod 12 thereof that the mass drives the nail into the support material.

The end 13 of the rod has been recessed over an axial distance being slightly bigger than the length of the clinging portion 3 of the nail 1 so as to release an axial boring 15 forming an annular skirt 16 for receiving a clinging portion 3 of a nail 1 of the invention, said skirt 16 also allowing to protect it. It is through the annular slice 17 of the end 13 thereof, in abutment against the propulsion collar 4 of the nail in firing position and serving as a hammer, that the mass 10 propels the nail into the wall to be covered with the insulating plates. It is to be noticed that the section plan 14 shown on Figs. 2, 3 is only provided to show with precision the end 13 of the mass and the use thereof.

The method for fastening an insulating plate 20 in a friable material to cover a wall partition 21 through the outside will now be described.

An insulation plate in a friable material 20 is being used, the side 22 of which, adapted to be applied against the (wall) partition 21, with a clinging coating 23 which is here meshed. Such coating can be glued, stapled or mounted by any other means. It can be a grid, a net, mainly in glas s fibers .

Nails 1 with a clinging portion 3, as above described, are driven into the external side 24 of the wall 21 adapted to receive the plate 20, by driving such nails up to their collar 4 and this, at regular intervals. The plate 20 is then applied against the wall 21, the clinging portions 3 of the nails 1 being driven into the plate 20 through the coating 23, but one of the fins 5 of the clinging portion 3 clinging to the coating 23.

It should be noticed that the clinging portions 3 of the nails 1 comprise several fins so that there is always one to be clung to the clinging coating in the case where the receiving side 24 of the wall 22 is not perfectly planar and it comprises recesses and/or bosses.