Two-hand Trip and Gate Devices

Two-hand Trip Devices

Two-hand trip devices require both hands to activate the machine. The devices are positioned in such a way that the operator must be in a safe place in order to reach the trip mechanism. Unlike two-hand controls, two-hand trips are effective only at the start of the machine's cycle, not throughout it.

Advantages and Disadvantages of Two-hand Trip Devices

Two-hand trip devices ensure that the worker is safe due to the devices' positioning and setup. The average worker should not be able to reach the controls to activate the machine unless the worker is in a safe space. Unfortunately, these devices are not effective once the machine is running, and they do not prevent the operator from reaching into the danger zone after the machine cycle has started.

Gate Devices

Gates are barriers that must be manually shut and completely secured before a worker can activate the machine. If the device is unable to close, the machine cannot begin its cycle.

Advantages and Disadvantages of Gate Devices

A gate is a device that must be closed, blocking access to hazardous areas, before the machine begins its cycle. It is similar to a guard because it provides a barrier between the operator and the danger zone, and also requires that the operator is a safe distance from hazardous parts before activating. One potential disadvantage is that the gate may block the operator's view of the material and process.

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