초록 ▼

Presented is a hardware punch and/or press apparatus adapted to assemble fastening devices to or punch holes in hardware for various purposes. The apparatus includes a stationary tool or anvil on which hardware on which an operation is to be performed is supported, and a hydraulically operated ram a

Presented is a hardware punch and/or press apparatus adapted to assemble fastening devices to or punch holes in hardware for various purposes. The apparatus includes a stationary tool or anvil on which hardware on which an operation is to be performed is supported, and a hydraulically operated ram adapted to move against the work piece or hardware upon activation of an appropriate switch. In one aspect of the invention, a mechanism is provided to effect retraction of the hydraulically operated ram without the imposition of a destructive pressure if the operator\s finger is contacted by the ram.

대표청구항 ▼

A hardware press for assembling fastenening devices or punching holes in sheetmetal hardware devices and incorporating safety provisions to prevent injury to the operator, comprising: (a) a base structure; (b) a pedestal assembly on the base structure and including a cantilever arm portion projectin

A hardware press for assembling fastenening devices or punching holes in sheetmetal hardware devices and incorporating safety provisions to prevent injury to the operator, comprising: (a) a base structure; (b) a pedestal assembly on the base structure and including a cantilever arm portion projecting laterally therefrom; (c) a pressure-exerting ram assembly mounted on said cantilever arm adjacent the free end thereof and including a hydraulic cylinder and a double-acting ram operatively associated therewith and selectively movable through a predetermined excursion along its longitudinal axis, said ram assembly being electrically insulated from said cantilever arm on which it is mounted; (d) an anvil mounted on said pedestal and underlying said ram assembly; (e) an upper tool holder slidably mounted on said ram in electrically conductive interrelation therewith and adapted to removably support a selected upper tool thereon; (f) a lower tool holder mounted on said anvil in electrically conductive interrelation therewith and adapted to removably support a selected lower tool thereon in cooperative relation to said upper tool; and (g) control means for normally selectively advancing said ram under a predetermined high hydraulic pressure to bring said upper and lower tools together into a predetermined pressure exerting relationship upon a workpiece interposed therebetween with a pressure injurious to the operator if imposed on the operator\s hand while automatically stopping advance of the ram if the operator\s hand is encountered between the upper and lower tool holders; (h) said control means including a normally-open safety switch operatively interposed between said ram and said upper tool holder and operable to close a circuit to stop the advance of the ram when a non-conductive element, such as the operator\s hand, is encountered with sufficient force to slidably displace said upper tool holder to close said normally-open switch.