| 摘要 |
<p>Shutterings constituted by two half-shells in the form of a right-angled dihedron, of which the edges of the horizontal panels are connected by clamping locks and of which each of the edges is connected to the bottom of the vertical panel by braces of adjustable length. The reduction in length dron. The shutterings are usable either as a complete "U" with the two half-shells integral, in which case the lower parts of the two vertical panels are connected, at the level of the lower supports of the braces, by removable horizontal bars of adjustable length, or as half-shells in the case of stripping being effected by half-shells separately, in which case props are used which are articulated on the free edge of the horizontal panel, these props resting on the ground. Means are provided for allowing simultaneous, rapid and reversible actuation of the groups of the members connecting the shuttering elements, this means that the shuttering elements may all take up their initial position which is strictly identical with respect to the other after each manoeuvre, rapidly and without adjustment. These groups of members comprise clamping look members ensuring that the free edges of the horizontal panels are brought flush with each other; clamping lock members ensuring that the free edges of the horizontal panels are maintained at different levels; clamping lock members ensuring the assembly and dismantling, as desired, of the free edges of the horizontal panels; members of the braces allowing a rapid, reversible shortening of the braces which, furthermore, have a means for finely adjusting their length. Means are also provided for facilitating the reduction of the angle of the dihedron formed by the horizontal and vertical panels and further means such as at least two horizontal bars are removably fixed to the bottom of the vertical panels and are provided with two means for modifying their length.</p> |
