FR2528946A1 - HIGH RIGIDITY ELEMENT, MANUFACTURED BY A COMPOSITE CONSTRUCTION PROCESS, PARTICULARLY A WALL, FLOOR OR ROOF ELEMENT FOR SELF-SUPPORTING COACHES OF COACHES - Google Patents

Abstract

THE INVENTION CONCERNS A HIGH RIGIDITY ELEMENT, IN PARTICULAR A WALL, FLOOR OR ROOF ELEMENT FOR SELF-SUPPORTING COACH BODIES, MANUFACTURED BY A COMPOSITE CONSTRUCTION PROCESS, WHICH CONSISTS OF AN EXTERIOR CLADDING ASSEMBLED WITH AN INTERIOR PART BY A LAYER OF FOAM OF PLASTIC MATERIAL, SO THAT THE EXTERIOR COATING AND THE INTERIOR STRUCTURAL ELEMENT ARE NOT IN DIRECT CONTACT WITH THEM AT ANY POINT. ACCORDING TO THE INVENTION, A PARTICULARLY RATIONAL MANUFACTURING OF ELEMENTS OF THIS KIND IS OBTAINED BY THE FACT THAT THE INTERIOR STRUCTURAL ELEMENT IS CONSISTED BY A FRAME COMPOSED OF HOLLOW PROFILES IN SHEET 2, 3 WHICH ARE FILLED ENTIRELY WITH FOAM 6 DURING OF THE FIXING OPERATION OF THE EXTERIOR COATING BY FOAMING.

Description

The invention relates to a high rigidity element.

  dity manufactured by a composite construction process, in particular a wall, floor or roof element for freestanding coach bodies, which comprises an external covering joined to an internal structural element by a layer of plastic foam

  in such a way that the outer covering and the element

  interior structure are not directly in

contact between them.

  We know from the published patent application

  in R F A under No. DE-OS 28 45 708, a laminated plate

  the roof or pavilion of a passenger car

  risme, which extends in a frame, which surrounds it,

  and which is glued to a support wing If a construction

  tion of this kind was to be used for a coach-

  bus, we had to make many panels of this kind, stick them to the corresponding support wings

and surround them with a frame.

  It is also already known to fill

  foam of a plastic material the cavities of the coach-

  motor vehicle lines to prevent corrosion.

  In this case, the plastic foam performs no other function than that of filling the cavities. Currently, the bodies of modern coaches generally have a frame composed of tubes or,

  sometimes other profiles, on which the

  ment is fixed, for example by rivets or the like, at the cost of a very long work, this process

  further leading to tensions and warping-

  covering sheet metal Foaming works

  possibly necessary to ensure protection.

  against corrosion and against noise constitute

  then other costly operations.

  2 - The present invention aims to create suitable elements in particular for

  the walls and roofs of coaches, which allow

  particular to build a body at an advantageous cost price. According to the invention, this problem is solved by the fact that the internal structural element is formed by a framework composed of hollow sheet metal profiles which are completely filled with foam during the operation of fixing the external covering by foaming. this, advantageously using open sheet metal profiles, the open bottom side of which is directed towards

the exterior coating.

  In this construction, the sheet metal profiles may have, according to an advantageous embodiment of the invention, a hat section (or

  in omega), and, to improve the solidity, the inferior side

  open laughter of these sheet metal profiles can be covered

  in certain regions of the profiles by a sheet of iron-

meture.

  In total, this provides the possibility of filling a prefabricated structure covering the entire length of the vehicle with foam, in a single work pass, and of assembling it in this way to the external coating, which leads to extremely rational production. It may be advantageous if the thickness of the plastic foam layer is less than the distance separating the outer covering from the bottom region of the sheet metal profiles, while the plastic foam layer ends on the outside. at

  flush with the exterior cladding.

  The object of the invention will be described with more

  details below with an example of a

  Read represented by the accompanying drawings in which: -3- Figure 1 is a perspective representation of a portion of a side wall of a coach, seen from the inside; Figure 2 shows on a larger scale a section taken along line II-II of Figure 1; and Figure 3 shows, also on a larger scale, a section taken along line III-III

of Figure 1.

  The side wall of a coachwork body which is represented in the drawing has a load-bearing framework 1 which is made up of sheet metal sections 2.3 with hat section (or omega), the sheet metal sections 3, which are in open, which can be closed in certain regions by closing plates 4, by

  example for reasons of solidity.

  The frame 1 is joined to an outer covering 5 by means of a layer of plastic foam 6, the outer covering 5 and the structure 1 extending everywhere at a certain mutual spacing. In the regions in which the profiles, of sheet metal 3 are covered by closure sheets 4,

  in all cases, a sufficient possibility must be left

  plastic foam penetration health,

  to guarantee full foam filling.

  The manufacturing of the elements according to the invention can be carried out in a known manner, in a press, the thickness of the layer 6 of plastic foam which can be adjusted as desired by boxes.

  -of bracing mounted between the zones of the framework 1.

  The transition region between the coating

  outside 5 and the closing plate 4, which is shown

  felt in Figure 2, may be provided with a groove 7 formed in the layer of plastic foam 6, in order to give the outer covering 5 a certain

  mobility while the vehicle is moving.

4 -

Claims (7)

  1. Element of high rigidity, in particular   wall or roof element for auto bodies   bus carriers, manufactured by a process of cons-   composite construction, which comprises an external covering joined to an internal structural element by a layer of plastic foam in such a way that the external covering and the internal structural element   are not in direct contact with each other, this element   ment being characterized in that the inner part consists of a frame (1) made of hollow sheet metal profiles (2,3) which are completely filled with foam during the covering fixing operation exterior (5) by foaming.   2. Element according to claim 1, character-   laughed by open sheet metal profiles (2) whose side   open lower is directed towards the outer covering laughing (5).   3. Element according to claim 1, character-   laughed in that the sheet metal profiles (2,3) have a hat section (or omega).   4. Element according to claim 2, character-   risé in that, in certain regions of the sheet metal profiles (3), the open lower side of these profiles is   closed by a closing plate (4).   5 Element according to any one of the claims   cations 1 to 4, characterized in that a framework (1) pre-   manufactured covering the entire length of the vehicle is replaced   folds of foam and joined by this means to the coating   exterior (5) all in a single work pass.   6 Element according to any one of the claims   cations 1 to 5, characterized in that the thickness of the plastic foam layer (6) is less than the distance separating the outer covering (5) from the - bottom region of the sheet metal profiles (2, 3) , the layer of   plastic foam (6) ending on the outside   laughing at the outer covering (5).   7. Element according to any one of the res-   dications 1 to 6, characterized in that a groove (7) is provided at the transition between the outer covering (5) and the closing plate (4).