Joints and connections – Rod to member to side – e.g. – plate – rod side – etc. – Intermediate member extends completely through side
Patent
1980-10-19
1982-11-23
Kundrat, Andrew V.
Joints and connections
Rod to member to side, e.g., plate, rod side, etc.
Intermediate member extends completely through side
403255, F16B 704
Patent
active
043602860
DESCRIPTION:
BRIEF SUMMARY
The invention relates to connectors for beams which have a longitudinal, T-shaped, undercut groove in which the aforesaid connectors engage.
German patent specification No. 1 054 320 describes a frame that comprises a bracket that is secured to a wall and a rail that is held by this bracket. In this frame, the rail has a longitudinal groove that is of T cross-section and a constricted entry in which the arms of the bracket engage. The arms are arranged in pairs, each having a hook head and which swing in opposition to each other in a common plane. The height of the hook heads is considerably less than the entry width of the groove. A screw member that engages near the hook head serves to support the arms and secure the engagement of their hook heads in the undercut portion of the groove. The hook heads rest on one-piece arms that move flexibly against each other and which, as a result of their unit construction, cannot move freely.
In a similar frame, described in U.S. Pat. No. 3,371,454 horizontal bars can be joined to a vertical column by means of coupling elements that engage in longitudinal grooves, these bars being tightened by screws so as to ensure engagement. For the most part, these coupling members are housed in the interior of the bars coincide, as mirror images, vis-a-vis the central plane of the column. In this type of construction the hook heads are incapable of free movement because of their unit construction.
Swiss patent application No. 442 870 describes a profile rail connection that is based on profile rails with T-shaped, profiled installation areas that can be gripped, pincer-like, by the clamping arms that are housed in the profile rail sections that are to be joined and can be adjusted vis-a-vis each other.
British Pat. No. 951,322 describes a bracket arrangement in which cross-beams can be secured to C-shaped profile rails at a selected length. At the foot end the cross-beam is bent to form a hook and supplemented by a tightener that has a hook head that is orientated in the opposite direction. The cross-beams must be slid into place from the ends of the rails.
German disclosure No. 1 775 802 describes a frame, the beams of which are provided with a T-shaped, undercut groove in which the coupling elements of the end portions engage, and which can be pressed against the two opposite walls of the constricted entry of the groove by means of an adjuster; in this connection one coupling element has a hook head, while the other coupling element is formed by lugs secured to the junction portion, which, viewed longitudinally along the groove, are located above and below the hook head of the first coupling element. This arrangement entails the disadvantage that only one coupling element has any resistance to tensile loads, while the other coupling element can only act as a guide. In addition, the pressure area of the one coupling element in relation to the other coupling element on the wall of the groove is relatively small, which can lead to escape from the groove.
The invention addresses the task of eliminating the disadvantages associated with state of the art connectors, particularly that of avoiding the irksome movement of the connectors that occurs prior to final tightening while, at the same time, ensuring equal pressure on both walls of the groove.
According to the invention there is provided a connector for beams with a longitudinal undercut groove adapted to receive the connector comprising a first coupling element and a second coupling element adapted to swing transverse to the plane of the groove, each said connector element including a hook head of a thickness slightly less than half of the width of the opening of said groove and an adjuster held in said first and second coupling elements, which adjuster resiliently biases said first coupling element away from said second coupling element.
As provided for by the invention the problem of prior art devices is solved in that the connectors consist of coupling elements that can swing freely in the transverse plane of the connector;
REFERENCES:
patent: 3338602 (1967-08-01), Arnd
Kundrat Andrew V.
Syma Intercontinental AG
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