Patent GB-1285752-A (GB)
Title: Joint structure
Inventor: ERNST HERBERT
IPC: E04B1/58
Filed: 1969-08-13
Abstract: 1285752 Joints H ERNST 13 Aug 1969 [16 Aug 1968] 15250/72 Divided out of 1285751 Heading A4H [Also in Divisions B3 and F2] A prefabricated joint for connecting two structural elements to each other comprises a tubular first element 1 with a bore 3 through which is inserted the second element 5 in the form of a rod so that the end surface 6 of the rod 5 extends towards the inner surface 7 of the wall 8 of the element 1 for direct attachment thereto. In the embodiment shown in Fig. 1, the rod 5 is attached to the tube 1 by a weld 9 which extends round the periphery of the rod 5, by semicircular welds 10 and 11 which extend partly round the outer surface of the rod 5, and by diametrically opposite web like welds (12, 13), Fig. 2 (not shown), which extend in the axial direction along the outer surface of the rod 5 and along the inner surfaces of the two other side-walls 14, (15) of the element 1. The wall 8 of element 1 may also be provided with a bore 16 which may be filled out with a weld 17 to secure the wall 8 to the end 6 of the rod 5. In a modification to this embodiment, a bracing tube (45) Fig. 9 (not shown) fits tightly and may be welded between the walls of the elements. In the embodiment shown in Fig. 4, a bracing tube 18 is inserted through the bore 3 of element 1 and its end 22 abuts against the bottom of a recess 21 in the wall 8 of element 1 so that the outer end surface of the bracing tube is flush with the outer surface of the wall 2. The weld 19 for securing the bracing tube to the wall 2 is countersunk into the outer side 20 of this wall. The end of a rod 24 abuts against one or more spacing washers 32 and may be secured to the wall 8 by a screw 25 screwed into the tapped bore 29. In a modification of this embodiment the rod 24 may be of a tubular shape and a spacing tube (36) Fig. 7 (not shown) of planks may be inserted into the bracing tube 18 to fit tightly between the bracing tube and the rod. In the embodiment shown in Fig. 8, a tubular part 37 integral with the wall 2 extends towards the wall 8 which is provided with a conical bearing part 38 which engages in a conical recess 39 in the end 28 of the rod 24. A conical serrated washer 40 may be inserted between the rod 24 and the bearing part 38 which exerts a frictional clamping action upon the conical surfaces when the clamping screw 42 is tightened. In a modification of this embodiment, a bracing tube (43) Fig. 10 (not shown), is provided, part of which has an internal diameter corresponding to that of the inserted end of the rod and part of which has a larger internal diameter to enclose the tubular part 37. In a further modification the bracing tube is divided into two parts (49, 50), Fig.11 (not shown) consisting of a bearing part which projects into a tubular record part and has a conical shape to fit the bearing part 38. In a still further modification, a bracing member (52) Fig.12 (not shown), has a bearing part for receiving the conical part 38, an opposite bearing part for receiving the tubular member 37 and a cover (56) integrally connected to the two bearing parts and adapted to seal the lateral opening of the element 1.