This technology is an integrated formwork fixing wedge pin that combines a pin body, which is inserted into the through-hole of a formwork connector, and an insert member, which is inserted perpendicularly into the pin body to lock it in place, using a pivoting connector. The insert member is typically folded against the pin body and is deployed by unfolding and rotating it into place.
Previously, two separate wedge pins were used—one inserted into the through-hole and the other inserted perpendicularly—which increased worker fatigue and caused construction delays if one pin was lost. There were no standards for fastening, and vibrations often caused pins to fall out of ceiling formwork. Magnetic wedge pins also had limitations, as they could detach under excessive force or vibration.
This technology features a pin body with a formwork support protrusion, a formwork fixing section matched to the through-hole width, a tapered insertion slope, and an elongated fixing hole. The insert member uses a dual-axis hinge with intersecting pivot and rotation axes to allow both folding and 90-degree rotation. The insert member includes a tapered body insertion slope, a support tab for the inner surface of the formwork, a rotation-avoidance slope to prevent snagging when folded, and an anti-play elastic tab to fill gaps in the fixing hole. The rotation pin is secured by a locking protrusion. This system can be used for aluminum and Euro-form wall assembly, high-rise apartment slab ceilings, and pier or column formwork. It simplifies inventory management for workers and ensures rapid, secure fastening that prevents pins from falling out, even in high-vibration ceiling applications.
This invention was developed with support from the Ministry of Land, Infrastructure and Transport's digital-based construction and safety supervision technology development program.
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