Tools – Hand held holder or having clamp
Patent
1991-05-13
1992-09-15
Kisliuk, Bruce M.
Tools
Hand held holder or having clamp
269218, 269236, B25H 300
Patent
active
051468166
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a clamp for connecting formwork panels which are arranged side by side in a plane and have edge profiles, particularly hollow profiles, running round them. The clamp includes two gripping jaws which are adapted to be swivelled against and urge together the oppositely directed longitudinal faces of the abutting edge profiles, and an actuating member for swivelling the gripping jaws. The end each gripping jaw which faces away from the clamping point has an adjusting arm oriented at an angle to the respective jaw. The adjusting arms of the two gripping jaws are directed towards one another and both gripping jaws are swivel-mounted on a bracket approximately in the corner region of the two adjusting arms of the jaws.
Such clamps, for connecting large formwork panels in particular are known in various embodiments. German Patent Specification No. 27 59 966 shows a clamp in which the clamping arms can be drawn towards each other and braced not in a swivelling manner but by a member traversing both the adjusting arms.
A clamp of the kind mentioned at the outset is known from European specification No. 0 201 887, in which the two gripping jaws have a common joint and the two adjusting arms are adapted to be swivelled relative to one another by a bolt traversing them. The joint is disposed in a corner at the transition of a gripping jaw to the adjusting arm thereof. Therefore, when being adjusted, the two gripping jaws are subjected to different lever arms and it is not ensured that there is a uniform transfer of force which can be utilized for aligning the two edge profiles to be connected. It is true that this prior publication also presents a solution with symmetrically disposed clamping jaws each having a swivel joint of its own, However the adjustment is provided for by way of a nut adjustable through a bolt. Apart from the unwanted use of a thread in the region of concrete placement, this also leads to friction and wear at the adjusting arms and additionally to increased expenditure in manufacture during assembly. In addition to this, the use of a thread for adjusting the clamping arms increases the time required to achieve a sufficiently large adjusting path and a clamping force of sufficient magnitude.
SUMMARY OF THE INVENTION
The object underlying the invention is therefore to create a clamp of the kind mentioned at the outset, which is simple in design, enables the formwork panels to be aligned at the same time as they are connected and can be positioned for use and removed again very quickly. It is nevertheless to be possible for the clamping forces, and above all the adjusting movements, to be applied to the two gripping jaws as uniformly as possible, approximately symmetrically to the parting line between the two formwork panels.
This object is accomplished in that the ends of the two adjusting arms overlap and that in the region where the two adjusting arms overlap both are jointly engaged by an eccentric with the pivot or swivel bearing of the latter being slidable perpendicular to the forming surface. If the common eccentric is rotated, the adjusting arms are swivelled and at the same time a corresponding reactive force is applied in the direction of the oblong hole, that is perpendicular to the forming surface. Therefore, the bracket is simultaneously urged against the outsides of the edge profiles and can align them to one another. It is of advantage that a single rotary motion of the eccentric is sufficient to immediately perform the desired bracing or release motion. This is effected most appropriately by connecting the eccentric, preferably integrally, to an actuating lever. A rotatable spindle with a corresponding pivot bearing and adjustable nut, or similar elaborate machine parts, are avoided in a simple way.
It is of advantage for the desired alignment of the two formwork panels if the bracket for accommodating the adjusting or swivel arms, the joints and the eccentric has a stop face turned towards the profiles to be braced with the s
REFERENCES:
patent: 919971 (1909-04-01), Smith
patent: 1709385 (1929-04-01), Young
patent: 2325417 (1943-07-01), Merrill et al.
patent: 2560929 (1951-07-01), Calbeck
Research Disclosure, Apr. 1985, No. 252 Kenneth Mason Publications Ltd., England.
Cruz Lawrence
Kisliuk Bruce M.
Kontler Peter K.
Maier Josef
LandOfFree
Connecting formwork panels does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Connecting formwork panels, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Connecting formwork panels will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-729953