Safety operating device and machine tool system comprising said safety operating device
A safety operating device for operating a machine tool in particular a hand-held machine tool includes at least one operating unit, in particular a dead-man unit, for actuating the machine tool. The operating unit is designed to be moved in a sequence of at least two mutually different actuating movements. The device further includes a pre-activation unit that is designed to enable activation of the machine tool by way of an actuation by the operating unit.
1 . A safety operating device for operating a machine tool, comprising:
an operating unit configured to actuate the machine tool, said operating unit configured and operable to be moved in a sequence of at least two different actuating movements; and
a pre-activation unit designed to enable activation of the machine tool by way of an actuation by the operating unit.
2 . The safety operating device according to claim 1 , further comprising a control unit which has at least one signal element,
wherein the pre-activation unit has at least one pre-activation element which is configured to initiate a pre-activation state for an effective connection to the signal element.
3 . The safety operating device according to claim 1 , further comprising a control unit which has at least one further signal element,
wherein the operating unit has an operating element configured for an effective connection to the further signal element at the end of a last actuating movement of the operating unit.
4 . The safety operating device according to claim 1 , wherein:
a first actuating movement of the operating unit comprises an at least partially rotational movement about an axis of rotation of an operating element, and
a second actuating movement of the operating unit comprises a translational movement radially with respect to the axis of rotation, the second actuating movement being effective, in a pre-activation state, to activate the machine tool.
5 . The safety operating device according to claim 1 , wherein the operating unit has a spring element configured to bring the operating unit into an initial position.
6 . The safety operating device according to claim 1 , further comprising a guide unit configured to (i) prevent a second actuating movement of the operating unit during a first actuating movement of the operating unit, and (ii) enable the second actuating movement of the operating unit at the end of a first actuating movement of the operating unit.
7 . The safety operating device according to claim 6 , further comprising at least one blocking unit arranged at least partially on the guide unit, said blocking unit being configured to, during the first actuating movement, block an advance into an end position of the first actuating movement in the event of a force influence on the operating unit which is directed radially with respect to an axis of rotation of the operating unit.
8 . The safety operating device according to claim 1 , further comprising a control unit configured to (i) end a pre-activation state of the pre-activation unit after a defined period of time when the operating unit is inactive, and (ii) prevent activation of the machine tool by the operating unit.
9 . A machine tool system, comprising:
at the least one machine tool including a machine tool accessory, and
the safety operating device according to claim 1 .
10 . The machine tool system according to claim 9 , wherein:
the machine tool has a drive unit, and
the operating unit is configured to, upon actuation, activate the drive unit in dependence on a switching state of the pre-activation unit.
11 . The safety operating device according to claim 1 , wherein the machine tool is a hand-held machine tool.
12 . The safety operating device according to claim 11 , wherein the operating unit is at least one dead man unit.
13 . The safety machine tool system according to claim 9 , wherein:
the machine tool is an angle grinder, and
the machine tool accessory is a grinding wheel.