Arrangement for fastening an insulating mat and process therefor

here we deal with a fixing arrangement an insulation blanket to an aircraft panel and a process related.

Some aircraft panels are covered a thermal insulation blanket to stop radiation from a source of heat neighborhood. Other insulation properties, in particular sound, may also be sought. these mattresses usually comprise fibers or other insulating material jammed between two strips metal. They are usually set by the points panel by the system shown in Figure 1, where the panel bears the reference 1, reference the mattress 2, the strip reference 3 and the wad Reference 4. The mattress 2 has openings 5 leading to the panel 1 and leaving free the bridges 6 riveted to the panel 1 which consist of platelets curved in the center to form a oei llet 7.

8 buttons are placed on the mattress 2 openings 5, and a wire loop 9 is engaged in the eyelet 7 and through two holes 10 of button 8 so that its ends appear to the surface of the mattress 2 to be twisted and give a braid that closes the loop 9. It then becomes impossible to pull the button 8, the mattress 2 still lying on the panel 1.

It is not convenient to manipulate loop 9 in the openings 5 ​​if they are narrow and deep, and above all to engage them in carnations 7. Therefore it is usual to start by bringing the loops 9 and to introduce them in eyelets 7, then ask the mattress 2, and finally down buttons 8 by passing the ends of the loop 9 through the holes 10 before close the loop 9. This process, however, remains difficult and time while forcing him to use relatively long loops 9; to allow assembling the loops 9 and of the bridges 6 through the openings 5, the mattress surfaces must be reduced; and it is often impossible to repair a faulty attachment point, with the mattress 2, fault be able to introduce a new 9 loop through the eyelet 7.

The invention relates to an arrangement fixing a thermal insulation blanket to a Aircraft panel to protect, including an opening Mattress leading by a carnation, a pierced button two holes covering the opening, a wire loop metal through the assembly holes on the button and slipped under the button, characterized in that comprises a hook fixed to the panel by a base, growing in the opening of the mattress to the button then curving toward the panel until a free end remote to the panel and the base, and in that the loop occupies the curved end of hook attached to the panel, forming a housing. This arrangement is much easier to assemble than the Previous and lends itself well to repair once that the mattress has been installed.

here are the figures used as basis for the detailed description of the invention and which will help to understand its different aspects :<ul><li>Figure 1, already described, is a view arranging fastening insulation blankets on a panel of the prior art,</li><li>FIG 2 is a view of the invention,</li><li>and Figure 3 illustrates the sequence an assembly process variant authorized by the invention.</li></ul>

Referring to Figure 2, it is seen that the bridge 6 has been replaced by a hook 12 comprising a base 13 riveted to the panel 1, a portion 14 main standing in the opening 5 above of the panel 1 and an end portion 15 bent to the base 13 while being separated by a spacing 16 leading to a housing 17 under the hook. The loop 9 here is engaged in the housing 17. As before, she is engaged through a pair of holes 10 button 8 (only one of them is shown) and its ends are twisted braid on the button 8 to close the loop.

The interest of the invention will be better comments of the assembly process. In contrary to what we did today, it becomes possible to First put the mattress 2 of the panel 1, the placing hooks 12 in openings 5, then down loops 9 through eyelets 21 in the openings 5, since you have to move laterally to introduce them into the housing 17 through the spacings 16, without the deform or turn, what was needed before going down one end of the loop 9 6 on the bridge and then to the back through the 2 mattresses even as the volume in the openings 5 was reduced. The button 8 can be lowered on openings 5 ​​when the loops were installed 9 in the brackets 12 and, as previously, ends of the loop are threaded through the holes 10 and joined together to close the loop 9.

It is conceivable that this fixing arrangement lends itself easily to repair by replacing the loop 9 damaged by another. And after a variant of the process illustrated in Figure 3, the loop 9 may be replaced by a loop pin 19 preformed whose ends are bent to 20 build on the buttons 8 next 10 holes. The sets consist of 8 buttons and buckles pin 19 descended on the openings 5 respective, loops 19 passing through the eyelets 21 of the stack 2, whereby the openings 5 lead to the outside, then moved laterally to the hairpin loops 19 pass into the spaces 16; 19 hairpin loops can then be reassembled in the housing 17 assembling the ends 20 therebetween.