초록 ▼

An apparatus for attaching rivets, buttons or the like to textiles or the like, having a plunger which performs the riveting stroke and whose upward and downward movement is controlled by the interaction of the top end of the plunger with a cam plate rotationally driven by an electric motor, the app

An apparatus for attaching rivets, buttons or the like to textiles or the like, having a plunger which performs the riveting stroke and whose upward and downward movement is controlled by the interaction of the top end of the plunger with a cam plate rotationally driven by an electric motor, the apparatus performing a sequence of attachments upon actuation of a switch or the like, the electric motor (39) running at a fixed preset angular velocity being stopped briefly in the top dead-center position of the plunger (24) by a braking device or the like in order to reduce the cycle frequency of the plunger stroke. To this end, the control unit switches off the drive motor (39) in the top dead-center position of the plunger for a preprogrammed time and switches it on again after the preprogrammed waiting time has expired and actuates a brake in particular during the waiting time.

대표청구항 ▼

[ We claim:] [7.] Apparatus for attaching rivets and buttons to textiles, comprising:an electric motor;a cam plate rotationally driven by the electric motor;a plunger disposed for performing a riveting stroke cycle by completing an upward and downward movement, said movement being controlled by inte

[ We claim:] [7.] Apparatus for attaching rivets and buttons to textiles, comprising:an electric motor;a cam plate rotationally driven by the electric motor;a plunger disposed for performing a riveting stroke cycle by completing an upward and downward movement, said movement being controlled by interaction of a top end of the plunger with said cam plate, wherein a course of travel of the plunger brings the plunger through a top dead-center position of the plunger;switch means for activating the apparatus to perform a sequence of cycles of attachments;means comprising an electronic control unit, operative during a running of the motor, for energizing the motor, and for briefly switching off the electric motor each cycle from running at a fixed preset angular velocity prior to a down stroke of said plunger, the top dead-center position of the plunger being at the beginning of a downward movement of the plunger in a riveting stroke; andbraking means for stopping said electric motor when said electronic control unit switches off the electric motor, the electronic control unit establishing a preprogrammed cycle time and waiting time for each cycle and, upon attainment of the preprogrammed waiting time, releasing the braking means and switching the motor on again;whereby the waiting time and the cycle time are adjustable while maintaining acceleration of the plunger independent of the cycle time during each of a succession of riveting strokes.