Secure machines and systems with an overtravel way

Prevent accidents with the Haake HST® force-guided trapped key interlocking system

In some industrial sectors, machines and systems are used that are designed in such a way that they require a stopping travelling way until they come to a complete standstill. In other words, even if they are switched off, it takes time for them to come to a standstill. A grinder, for example, has such a run-on process and harbours the risk of a fatal catchment area if the standstill is not waited for.

In order to rule out such dangers and thus accidents, HAZEMAG & EPR GmbH has opted for the longstanding, robust and proven sequential protection provided by a HAAKE HST® key transfer system.

To open the guard locking device on the Hazemag impact crusher and activate the release of the HAAKE HST® M key, the user must first switch off the machine. Only after the grinder has come to a complete standstill can a switch be pressed and the key released. This key can now be used to open the service flap in the HAAKE HST® tumbler device on the impact crusher - the key is trapped in the tumbler device.

As long as the service flap is open, the key cannot be removed. This is only possible when the flap is closed. This ensures that the machine cannot be started if a person is in the danger zone.