LOCK FOR FORM PANEL CONNECTION Russian patent published in 2006 - IPC E04G17/07 

FIELD: connecting or other auxiliary members for forms, falsework structures or shutterings, particularly lock for form panel connection.

SUBSTANCE: lock comprises L-shaped catches formed as forks and bails in connection areas. The catches are provided with slants and have transversal grooves moving when lock is in its opened position to provide tightening of adjacent form panels. The lock also has locking wedge defining arch in cross-section having uniform thickness in area of locking wedge cooperation with annular segmented grooves. The locking wedge is provided with fixer created at narrow end thereof and with anvil formed at wide end thereof. The locking wedge is freely inserted in transversal channel and may cooperate with groove ends during lock closing and may move in catch grooves. The locking wedge is provided with pivot connection, which admits fixed mutual fork and bail rotation about pivot connection axis. Transversal grooves of L-shaped catches are made as annular segments and arranged along a circle having center coinciding with pivot connection axis. The transversal grooves are symmetric about slants of L-shaped catchers and located between support surfaces of L-shaped catchers adapted to connect adjacent form panels and pivot connection. Radius of locking wedge curvature is equal to that of above annular segmented groove having center coinciding with pivotal connection axis. Ends of annular segmented grooves mating each other have inclination angles equal to that of locking wedge end slant. The locking edge has the same thickness over the full wedge length. The wedge end slant angle is 3-5° and is chosen to provide self-braking.

EFFECT: reduced stresses in wedge connection and possibility to bate demands of lock production accuracy, increased reliability of form panel connection and increased operational convenience.

4 cl, 3 dwg