Joints and connections – Branched – Three or more radiating members
Patent
1991-10-21
1993-11-09
Reese, Randolph A.
Joints and connections
Branched
Three or more radiating members
403178, 403217, 4034091, 411 80, F16B 704
Patent
active
052596842
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a process for the detachable attachment of a tubular strut to a column to a connecting element for performing the process and to a connection of a tubular strut with a column by means of a connection device.
A connection device for connecting a column to a tubular strut has been known from U.S. Pat. No. 4,365,907. In the conventional connection device, a rectangular tubular strut is connected to a rectangular tubular column with the aid of a central wedge element provided with a threaded through bore as well as two lateral wedge elements pressed by the central element against the inner wall of the strut. The three wedge elements are joined by a deformable strip. On the outer wall of the column, a base plate is arranged on which rests, in turn, the end face of one end of the strut. The base plate is pinned to the column. At the mounting site of the strut, the column is equipped diametrically with two bores. A screw can be passed with its head through the bore lying in opposition to the mounting site, the head then being in contact with the rim of the bore of the other bore. For establishing the connection of strut and column, the screw is passed into the column, the base plate is placed on the screw on the outside of the column, and the screw is threaded into the central wedge element. Subsequently, the strut is pushed over the wedge elements, and the screw is tightened; during this step, the central wedge element is pulled against the column and thereby the two lateral wedge elements are urged against the inner wall of the strut. There is no possibility for mounting two opposed struts at the same level.
In a connection of a column with a strut of a different type, as disclosed in Swiss Patent 429,317, the connecting element in each case consists of respectively one wedge element pair which can be inserted in the tube ends of the column as well as of the strut to be joined together, and of a head with threaded bores. The wedge elements are pulled against the head by means of a screw threadable into the thread in the head whereby the wedge elements are pressed against the inner wall of the strut and, respectively, of the column. In the connection, which is not of the type under consideration herein, only tube ends can be joined. If it is intended to attach two opposed struts to a column, then the column must be cut to the length corresponding to the level of mounting of the two struts.
SUMMARY OF THE INVENTION
It is an object of the invention to avoid the drawbacks of the conventional connection devices, and also to provide a connection between column and strut which can be established in a simple way and which transmits high flexural and shear forces.
The attainment of this object with respect to the process for the detachable connection of a tubular strut to a column with respect to the connection device for performing the process and with respect to the connection is set forth hereinafter following in greater detail.
Examples of the connection device according to this invention and of the connection in accordance with the invention will be described in greater detail below with reference to drawings wherein:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective sectional view of a connection of four struts to a column by means of a connection device consisting of a core inserted in the column and four wedge element pairs, the wedge elements of which are axially displaceable with respect to one another by means of a screw,
FIG. 2 shows a perspective view of a wedge element of the wedge element pair utilized in FIG. 1,
FIG. 3 shows a perspective view of the other wedge element of the wedge element pair utilized in FIG. 1,
FIG. 4 is a top view of the wedge element illustrated in FIG. 3,
FIG. 5 is a perspective view of a modification of a connection of a strut to the column,
FIG. 6 is a longitudinal cross-section perspective view illustrating a mandrel positioned for releasing the wedge-elements from a strut, and
FIG. 7 is a view similar to FIG.
REFERENCES:
patent: 2212455 (1940-08-01), Reed
patent: 3912410 (1975-10-01), Pofferi
patent: 3945743 (1976-03-01), Koch
patent: 4089382 (1978-05-01), Pessier
patent: 4365907 (1982-12-01), Berry
Kim Harry C.
Reese Randolph A.
USM U. Scharer Sohne AG.
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