| 摘要 |
A double latch locking device for supporting a scaffolding in erected condition. The scaffolding comprises frames parallel to one another and supported vertically by crossrods having bored ends. The latter engage a short horizontal stem projecting from the interior plane of each frame, whereas a rigid arm projects above each of the stems parallel thereto. Two latches are pivoted independently of one another to a same pivotal axis located at the free end of the rigid arm, to move within the interior plane of the corresponding frame, and are adapted to releasably retain the stay rods to the frame in a limit locking position. The present device is characterized in that it enables the locking of a variable number of stay rods on the stem with a minimum of play; the first latch will retain for example up to three stay rods which would have been engaged on the stem, whereas the second latch will retain for example up to five stay rods. The lower end of each latch is bevelled, and the rigid arm defines a seat in register with the pivotal axis, wherein in the limit locking position, any bias sustained by the latches to overcome this limit position is being completely neutralized by at least one of the latches which bears by its bevelled end against the stem and by the second latch which abuts against the seat of the rigid arm.
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