Riegelsystem

Riegelsystem, literally “bar system” in German, is a term used in mechanical engineering and security hardware to describe a family of locking mechanisms that rely on rigid bars (Riegel) to secure a component against unwanted movement. The exact form and function vary by application, but the underlying principle is a sliding or rotating bar that engages a keeper.

A typical Riegelsystem comprises one or more Riegel elements that slide, rotate, or pivot into a fixed frame or strike, a guiding housing, and an actuation device such as a manual lever, spring, or electric motor. The bars may engage in serrated or stepped recesses to provide secure locking, and some designs allow partial opening by withdrawing only select bars.

Applications range from door hardware and window guards to safes, cabinets, and safety enclosures on machinery. In industrial use, Riegel systems are valued for robustness and simplicity, with configurations including single-debar locks for basic latching and multi-bar systems for higher security or controlled access.

The term appears most commonly in German-language technical literature dating from the 19th and 20th centuries. In modern practice, more specific nomenclature (for example, bolt lock, crossbar latch, or guide-bar mechanism) is often used depending on the device and standardization.

See also: bolt lock, crossbar latch, door hardware. This article is a general overview; for a precise definition, the context of the device, industry, or standards should be provided.