Screw-driving devices
AssigneeFeinwerkbau Helfer & Co. KG
InventorEwald Hornung
Life of this patent
Estimating the term…
Abstract
A screw-driving device includes a casing having a slide member which in turn supports an indexing arrangement for indexing a flexible belt carrying a plurality of screws, the indexing arrangement serving to index a screw into a screwing station whenever the device is operated. The index arrangement includes sprocket discs the teeth of which engage the notched belt and movement of the indexing device to index the belt through one pitch is controlled by a coupling movable under the control of a pin slidable in an elongate aperture or recess in the casing of the device. A plurality of springs is employed to return the slide member to its inoperative condition at the end of each working cycle.
Claims9
In a device for driving screws,
- means defining a screw-holding magazine,
- a casing,
- a screw-driving member mounted for rotation in the casing,
- drive means,
- coupling means for coupling said drive means to the screw-driving member,
- means for indexing successive screws from the magazine into a screw-driving station in which each successive screw is aligned with the screw-driving member,
- a slide member slidable in the casing and carrying the indexing means,
- means operable by exertion of an applied force between the slide member and a workpiece about to receive a screw, to actuate the indexing means and thus index a screw in the magazine to the screw-driving station, to bring the screw-driving member into engagement with the indexed screw and to actuate the drive means to drive the screw by the screw-driving member through the coupling means, and
- resilient means effective to resist said force exerted between the slide member and the workpiece and to return the device to its initial configuration.
A screw-driving device comprising
- means defining a screw-holding magazine in the form of an apertured, edgewise notched belt,
- a casing,
- a slide member slidable in the casing and carrying,
- means for indexing successive screws held in the magazine to a station at which the screws can be driven into a workpiece, said indexing means including
- a sprocket member having sprocket teeth arranged to engage the notches of the magazine belt,
- a drive coupling,
- means defined by the casing for controlling the coupling in response to relative sliding motion between the slide member and the casing to index the belt, and
- means operative on the sprocket member to permit movement thereof in the indexing direction and prevent movement in the opposite sense,
- a screw-driving member,
- a drive mounted on the casing and connectable to the screw-driving member to rotate it and drive a screw at the screw-driving station, and
- resilient means biasing the slide member to an inoperative condition,
- the device being operated by movement of the slide member relative to the casing from said inoperative condition.
Dependencies are inferred from the claim text.