Profile-section support system for industrial-fair and exhibition construction

1. A profile-section support system, comprising:

hollow profile-section supports ( 10 , 40 , 41 , 42 , 60 ) of polygonal cross section, having at least one of outer side ( 14 , 15 , 16 , 17 ) with edges provided with ribs ( 18 , 19 , 20 , 21 ) defining grooves ( 22 ) with peripheral undercuts therebetween;

additional parts selected from the group consisting of further profile-section supports ( 10 , 40 , 41 , 42 , 60 ) and other parts;

connecting elements ( 43 , 44 , 63 ) anchored in said undercuts and connecting said additional parts, said connecting elements having corner regions with inner corner grooves ( 23 ), thereby allowing a spreading apart of the ribs ( 18 , 19 , 20 , 21 ) with deformation of the at least one outer side ( 14 , 15 , 16 , 17 ) wherein ribs are disposed on the at least one outer side ( 14 , 16 , 17 ) adjoining the hollow profile-section supports ( 10 , 40 , 41 , 42 , 60 ), and wherein two ribs ( 18 , 19 , 20 , 21 ) on an edge between adjacent outer sides ( 14 , 16 , 17 ) of the hollow profile-section supports ( 10 , 40 , 41 , 42 , 80 ) define an outer corner groove ( 24 ).

2. The profile-section support system of claim 1 , wherein the outer corner groove ( 24 ) has peripheral undercuts for receiving securing elements.

3. The profile-section support system of claim 1 , wherein the inner and outer corner grooves ( 23 , 24 ) are disposed such that between them, the inner and outer corner grooves define a pivot axis (D 1 ) for a spreading motion of the two ribs ( 20 , 21 ) that define the outer corner groove ( 24 ).

4. The profile-section support system of claim 2 , wherein the peripheral undercuts of the grooves ( 22 ) on the outer sides of the hollow profile-section supports and the peripheral undercuts of the outer corner grooves ( 24 ) define pivot axes (D 2 , D 2 ) for a pivoting motion of regions ( 20 . 1 , 21 . 1 ) of the ribs ( 20 , 21 ) that form the peripheral undercuts.

5. The profile-section support system of claim 3 , wherein the ribs ( 20 , 21 ) containing or defining the pivot axes (D 1 , D 2 , D 3 ) are disposed at least slightly inclined in a direction of an inside of the groove.

6. The profile-section support system of claim 1 , wherein the inner and outer corner grooves ( 23 , 24 ) are disposed and shaped such that an impact or tensile stress on the face ends of the ribs ( 18 , 19 , 20 , 21 ) is transmitted linearly to an opposite side ( 14 , 15 , 16 , 17 ) of the hollow profile-section supports ( 10 ), and wherein no compression or expansion of the cross section of the hollow profile-section supports ( 10 ) occurs.

7. The profile-section support system of claim 1 , wherein on portions of the ribs ( 20 . 1 , 21 . 1 ) that define the undercuts of the grooves ( 22 , 25 , 29 , 61 ) on the sides ( 14 , 15 , 16 , 17 ) of the hollow profile-section supports, small additional grooves ( 67 ) are disposed for receiving edges of spring elements ( 64 ), wherein said spring elements cooperate with sliding blocks ( 63 ), wherein said blocks can be anchored in the groove ( 22 , 25 , 29 , 61 ) formed by the ribs ( 18 , 19 , 20 , 21 ).

8. The profile-section support system of claim 1 , wherein the profile-section supports ( 10 , 40 , 41 , 42 , 60 ) are subdivided into a plurality of chambers ( 11 , 12 , 13 ).

9. The profile-section support system of claim 8 , wherein the chambers ( 11 , 12 , 13 ) have an at least approximately square cross section.

10. The profile-section support system of claim 9 , wherein the profile-section supports ( 10 , 40 , 41 , 42 , 60 ) have middle ribs ( 28 ) protruding outwardly at points where chamber partitions ( 26 , 27 ) abut the outer profile walls ( 16 , 17 ), wherein the middle ribs and/or the middle ribs and the outer ribs ( 18 , 21 ) disposed on outer edge regions of the profile-section supports ( 10 , 40 , 41 , 42 , 60 ), define grooves ( 25 , 29 ) with peripheral undercuts.

11. The profile-section support system of claim 10 , wherein the middle ribs ( 28 ) are disposed rigidly, and wherein the grooves ( 25 ) defined between the middle ribs ( 28 ) and the outer ribs ( 28 , 21 ) are asymmetrical with respect to a center axis ( 30 ).

12. The profile-section support system of claim 11 , wherein groove openings (X 1 , X 2 ) are disposed asymmetrically with respect to the center axis ( 30 ) of the grooves ( 25 ).

13. The profile-section support system of claim 10 , wherein fast-action connecting elements ( 43 , 44 , 63 ) are anchorable in the grooves ( 25 , 29 ), and wherein the fast-action connecting elements are also anchorable in side grooves ( 22 ) of the single-chamber hollow profile-section supports without middle ribs.

14. The profile-section support system of claim 1 , wherein the connecting elements ( 43 , 44 , 63 ) have a leaf spring ( 48 ) bent into a U, wherein legs of the U are shaped into locking lugs ( 49 ) that engage the groove ( 22 , 25 , 219 , 47 , 61 ), provided with an undercut, and wherein legs of the U can be braced by means of spreading apart of the legs in the groove ( 22 , 25 , 29 , 47 , 61 ) by means of a body of rotation ( 50 ), wherein said body of rotation is actuatable by a wrench ( 51 ).

15. The profile-section support system of claim 14 , wherein no stops for limiting a closing position of the body of rotation ( 50 ) are disposed on the fast-action connecting element ( 43 , 44 ).

16. The profile-section support system of claim 14 , wherein the body of rotation ( 50 ) is actuatable by means of a socket wrench ( 51 ) having a rectangular cross section.