Static molds – In situ construction engineering type or building type-mold... – Forming building structure
Patent
1990-01-29
1991-11-12
Woo, Jay H.
Static molds
In situ construction engineering type or building type-mold...
Forming building structure
249195, 249196, 2492191, E04G 1700
Patent
active
050641638
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention concerns a connecting device with a clamp for shuttering panels having edge webs which extend at right angles to the shuttering skin and are gripped round by the clamp in its position of use The clamp is pivotable about an axis parallel to one of the edge webs into a loose position and a position of use. The clamp can be fastened in its position of use, with a free clamp arm facing away from the pivot bearing, against a rod or the like running parallel to the second edge web and can be clamped in such a way that the two abutting edge webs are pressed together.
A comparable connecting device is known from U.S. Pat. No. 3,550,898. The pivoted clamp is formed in two parts in this case, and the free clamp arm must be guided to shift relative to the pivoted clamp arm and is drawn back into its clamping position. Drawing back takes place by means of a wedge which penetrates elongated slots in the two associated parts of the clamp. The free clamp arm is formed like a hook and grips round a rod or bolt in its position of use. In this way it is true that the edge webs of two shuttering panels are drawn together, but there exists the danger because of the unavoidable play inside the individual parts belonging to this connecting device that they are clamped together offset to one another and graduations arise later in the concrete.
SUMMARY OF THE INVENTION
There therefore exists the task of creating a connecting device of the type mentioned at the beginning with which alignment of the shuttering panels to be connected is achieved. A separate wedge which can possibly get lost should be avoided.
To solve this task, the connecting device of the type mentioned at the beginning is improved in that the clamp, in its position of use, grips the surfaces of the edge webs facing away from each other, at least in part. To clamp the free clamp arm to the rod, an extension piece sliding approximately in the direction of the free clamp arm is provided and grips the rod from below in a clamping manner after sliding. Due to the formfitting closure, alignment of the shuttering is achieved upon clamping and an aligned shuttering panel is held in this position. The sliding extension piece makes a separate clamping wedge superfluous.
Alignment of the shuttering panels can be achieved particularly well and securely if the free edges of the edge webs lie against the inside of the clamp in its position of use. In this way possible slight displacements of the edge webs can still be eliminated by the clamping and fixing of the clamp.
The extension piece can be arranged on a projection of the free clamp arm which can be swung past the rod and is spaced from the rod in its position of use. Thus the clamp arm can be conveniently swung past the rod into its position of use with the extension piece pulled back or, after pulling back the extension piece, it can be brought into its loose position. In the position of use, fixing and clamping can take place in a simple manner by pushing out the extension piece. In this case it is particularly expedient if the upper side of the sliding extension piece facing the rod runs obliquely to the sliding direction and the side of the rod gripped from below such that the upper side is upwardly inclined in a direction opposite to the sliding direction. In this way, when the clamp is fixed in its position of use with the aid of the sliding extension piece, a clamping effect is simultaneously achieved because of the mentioned inclination. Subsequent loosening is also made easier.
A simple design results if the extension piece can slide on a support running approximately parallel to the underside of the rod and is formed as a wedge. In this way the desired wedging and clamping results upon the mentioned sliding of the extension piece into its clamping position, which is also sufficient for fixation and can generate the desired clamping forces quickly and simply. In this way the fastening and clamping wedge--in addition to being guided at the underside thereof facing awa
REFERENCES:
patent: 2964294 (1960-12-01), Imonetti
patent: 3363877 (1968-01-01), Gates
patent: 3550898 (1970-12-01), Ursini
patent: 4188017 (1980-02-01), Dingler
Davis Robert B.
Kontler Peter K.
Maier Josef
Woo Jay H.
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