Joints and connections – Member ends joined by inserted section – Externally bridged
Patent
1990-01-10
1991-10-08
Kundrat, Andrew V.
Joints and connections
Member ends joined by inserted section
Externally bridged
403297, 403286, F16B 700
Patent
active
050549510
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an arrangement for the mechanical connection of tubes of different cross-sectional form arranged alongside or after one another.
2. History of the Related Art
Tube connections of various kinds are already disclosed, in which use is made of expanding internal joint devices or joint devices with clamps which are tightened with a nut and bolt.
SUMMARY OF THE INVENTION
A simple and inexpensive, yet very effective connection arrangement is obtained by the arrangement in accordance with the invention. This is achieved by a coupling ring positioned at the end of a tube and surrounding the tube, a straight profiled rod of constant cross-section facing inwards from the end of the tube and passing through the coupling ring, and at least one attachment device arranged in the wall of the tube and at a certain distance from the end of the tube so constructed as to engage with and to force the profiled rod into contact with the internal surface of the tube at contact points along two contact lines or contact areas running longitudinally of the tube.
Additional advantages are achieved through the characteristic features indicated in the claims.
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is now described in greater detail in relation to a number of embodiments given by way of example in conjunction with the accompanying drawings, in which:
FIG. 1 illustrates in perspective having portions broken away two side tubes in a frame structure and components for connecting the tubes;
FIG. 2 illustrates a section through the frame tube in FIG. 1, but with a coupling ring for an additional tube;
FIG. 3 is a top plan view of the arrangement shown in FIG. 2, with the indicated section line II--II for the section in FIG. 2;
FIG. 4 is a top plan view from above, corresponding to that shown in FIG. 3, but with an adapter consisting of four interconnected coupling rings;
FIG. 5 is a top plan view from above of an adapter executed from three interconnected coupling rings;
FIG. 6 is a perspective view illustrating a locking component for the tube and the coupling ring;
FIG. 7 is an illustrational view of the locking component of FIG. 6 applied to a frame tube;
FIG. 8 is a section through the frame in FIG. 7 in accordance with the line VIII--VIII;
FIG. 9 is an illustrational assembly view showing connection components with a twisted profiled rod;
FIG. 10 shows a cross section taken through line X--X in FIG. 9;
FIG. 11 is a cross-sectional illustrational view showing components used for connection in the case of square tubes, with an eccentric as the attachment device;
FIG. 12 is a top plan view of FIG. 11;
FIG. 13 is a perspective illustrational view of a frame produced by means of the invention for supporting one or more shelves;
FIG. 14 is an illustrational view showing eight frame tubes, included in four frames, attached to one another and provided with feet;
FIG. 15 is an illustrational view showing a wall consisting of six frames with twelve interconnected frame tubes set up on an uneven floor;
FIG. 16 is a bottom plan view of the frames in FIG. 15;
FIG. 17 is a top plan view of the frames in FIG. 15.
DESCRIPTION OF THE PREFERRED EMBODIMENT
The designation 1 is used in FIG. 1 in respect of a frame tube which is a part of a frame, whereas 2 is used to designate the corresponding frame tube in an upper frame. 3 is one of the side tubes in the frame 1, and 4 is one of the side tubes in the frame 2. The designation 5 a simple coupling ring which is so structured as to be capable of accommodating on its inside the tubes 1 and 2, respectively on the lower side and on the upper side. The design of the ring is described in greater detail below.
Internally threaded blind rivets 6 are securely attached to the walls of the tubes 1 and 2 close to the ends of the tubes. Screws 7 with hexagonal socket heads are threaded into the rivets 6. These screws serve as attachment devices for the profiled rod 8. When screwed in fully, the screws force the pro
REFERENCES:
patent: 2290430 (1942-07-01), Heiser
patent: 2483341 (1949-09-01), Haas
patent: 2603513 (1952-07-01), Greitzer
patent: 3547475 (1970-12-01), Gingher
patent: 3606408 (1971-09-01), Wagner
patent: 4570408 (1986-02-01), Frascaroli et al.
Lundgren Alvar
Lundgren Anders
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