Latches

Latches for roll stops – locking of the flap mechanism

Latches are the form-fitting locking elements that fix the roll stop flap in the locked or release position. They engage in a recess on the flap lever or on the shaft and hold the position until the next operation. At SULEJ Ladebordwand you will find latches in different profiles, spring strengths and connection variants, matched to common flap mechanism designs on the market – for a defined position of the safety elements on the tail lift.

Construction and function – locking tabs, spring plates and pins

A latch typically consists of a locking tab, a spring element and a holder on the support plate. The tab engages in a recess on the operating lever and is released again via spring or lever travel. Common designs are versions with a spring-loaded pin, with a spring plate or with an additional locking screw. Corrosion-protected steels and spring steels are used, sometimes with phosphating or galvanising. The geometry of the locking tab depends on the lever mechanism and the desired holding and release force.

What to consider during selection and replacement

Important factors are the profile shape of the locking tab, the spring force and the mounting borehole. A worn latch causes the flap to snap out of the locked position by itself – a clear safety risk. Before replacement, the locking recess on the lever and the contact surfaces on the support plate should be checked for wear edges. Seized locking screws and corroded springs are usually replaced together with the latch to fully restore functional reliability.

Benefits at a glance

• Defined holding and release force for the flap mechanism
• Profile shapes and spring strengths for different lever designs
• Corrosion-protected materials for long service life outdoors
• Mounting geometries matched to common support plate designs

A smoothly working latch reliably secures the locked position of the flap and prevents unintended position changes during driving.