Static structures (e.g. – buildings) – Rigid barrier cantilevered from vertical support
Patent
1987-05-28
1988-11-22
Safavi, Michael
Static structures (e.g., buildings)
Rigid barrier cantilevered from vertical support
52285, 52725, 403262, E04B 256, E04B 138, F16L 4108
Patent
active
047855916
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a joint of the type described in the preamble of the following main claim. An example of such a joint is described in Swedish Lay-Open Print 8301953-9.
In the known joint, separate anchoring means are used, which can be fixed to one of the tubes and inserted through an insertion opening in the other tube to be embedded when the two tubes are filled with concrete, particularly expanding concrete.
The object of the present invention is to make possible a simplified and thus cheaper manufacture of a tube provided with such anchoring means. This is achieved by a joint which in accordance with the invention has the characterizing features defined in the following main claim.
In manufacturing the first tube, which is to be provided with the anchoring means, this can be done simply by laser cutting and subsequent bending of the parts thus freed to positions disclosed in the characterizing clause of the main claim. Usually the first tube is substantially narrower than the second tube, but within the scope of the invention it is also possible to make a joint between two tubes of essentially the same width. The tubes can form various desired angles to each other within the scope of the invention.
Two simple embodiments of the joint according to the invention are shown as examples in the accompanying drawings.
FIG. 1 shows a first embodiment of a joint according to the invention in section along the line 1--1 in FIG. 2.
FIG. 2 is a section along the line 2--2 in FIG. 1.
FIG. 3 is a perspective view of one end of the first tube with the anchoring means.
FIG. 4 shows the cutting and bending of the parts of the tube end to form anchoring means.
FIG. 5 shows the first tube of a second embodiment of the invention in a perspective view.
FIG. 6 shows in section this first tube mounted in the second tube.
FIG. 1 shows a horizontal first tube 10 of rectangular cross-section, comprising two side walls 11,12 and two transverse walls 13,14 between the edges of the side walls.
A second rectangular tube 10A has two side walls 15,16, a front wall 17 and a rear wall 18. The front wall is provided with a rectangular insertion opening 19 with lateral edges 20,21 and transverse edges 22,23.
In the example shown, the joint is made so that the first tube 10 fits relatively snugly into the opening 19. Any play can be taken up by seals (not shown).
In the inserted position shown in FIG. 1, the first tube 10 has two anchoring wings 11A,12A which are extensions of the side walls 11,12 and extend up to the vicinity of the rear wall 18.
The transverse walls 13,14 of the pipe extend up to the opening 19, and there the transverse wall 13 continues at the opening with a tongue 13A which lies against the front wall 17 of the tube 10A and is fixed in this position by means of a ring 24 around the tube 10A and over the tongue 24 to hold the tubes 10,10A in position when concrete is cast into the two tubes.
The second transverse wall 14 continues with an intermediate wall 14A which is bent in the vicinity of the rear wall 18 and extends with an anchoring tongue 14B along the rear wall 18.
In the intermediate wall 14A there is a flow-through opening 25, through which concrete can flow when the two pipes are filled with concrete, thus embedding the anchoring means 11A,12A,14A,14B in cast concrete.
As is indicated in FIGS. 1 and 3, the intermediate wall 14A can be separated from the wings 11A,12A by means of slits 26, these being necessary if the wings 11A,12A are to be closer to each other than the width between the walls 11,12. The tongues 13A,14B and the intermediate wall 14A should have a corresponding smaller width, which is the case if the tube 10 has the same width as the tube 10A. The two tubes 10,10A can be identical. The opening 19 then takes up the entire internal width between the side walls 15,16 of the tube 10A.
FIG. 4 shows how it is possible in a simple manner to achieve the tube end shown in FIG. 3 using a tube 10 of rectangular cross-section. Slits 27,28 are made in the side walls, e.g. using a laser. T
REFERENCES:
patent: 3832811 (1974-09-01), Briel, Jr.
patent: 3970401 (1976-07-01), Lubeck
patent: 4125973 (1978-11-01), Lendrihas
patent: 4137576 (1979-02-01), Greene
patent: 4632473 (1986-12-01), Smith
patent: 4660331 (1987-04-01), Dahler et al.
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