EP 0005634 A1 19791128 - Safety devices for mechanically operated apparatus such as punch presses.
Title (en)
Safety devices for mechanically operated apparatus such as punch presses.
Title (de)
Sicherheitsvorrichtungen für mechanisch angetriebene Einrichtungen wie Stanzpressen.
Title (fr)
Dispositifs de sécurité pour des appareils entraînés mécaniquement tels que des presses à poinçonner.
Publication
Application
Priority
US 90844278 A 19780522
Abstract (en)
A safety device for mechanically-operated apparatus, such as a flywheel-driven punch press, consists of a hook-providing coupling member (34,36) for mounting on the press crank shaft (22), and a cooperating coupling member (38,40) for connection to the apparatus body via a power-absorbing member (52-60). The coupling members (36,40) rest in the coupled position and are moved momentarily to the uncoupled position upon initiation of an operation by the operator. If therefore the movable member (20) of the press continues to move after the normal termination of the cycle the coupled members (36, 40) connect the movable member (20) to the power-absorbing member (52-60) so that the movable member (20) is brought to a stop before the press die parts can close. The power-absorbing member (52-60) preferably is a hydraulic piston (54) and cylinder (52) device connected between one coupling member and the press body, the liquid in the cylinder interior becoming pressurised and discharging via a pre-set relief valve or calibrated orifice (58,60) when the device is operative.
IPC 1-7
IPC 8 full level
B21D 28/00 (2006.01); B30B 15/28 (2006.01)
CPC (source: EP)
B30B 15/288 (2013.01)
Citation (search report)
- GB 1270654 A 19720412 - BROUGHTON ENGINEERING LTD
- FR 2003031 A1 19691107 - DANSK PRESSEFABRIK
- GB 1139156 A 19690108 - MAY PRESSENBAU GMBH
- DE 2452751 A1 19760520 - WEINGARTEN AG MASCHF
- DE 2612599 A1 19771006 - LEINHAAS WERNER
- DE 2527716 A1 19761230 - EDELHOFF WERKZEUGMASCH
- FR 2343593 A1 19771007 - AIDA ENG LTD [JP]
- BE 465322 A
Designated contracting state (EPC)
AT BE CH DE FR GB IT LU NL SE
DOCDB simple family (publication)
EP 0005634 A1 19791128; EP 0005634 B1 19820804; EP 0005634 B2 19850717; CA 1101782 A 19810526; DE 2963466 D1 19820930; JP S54153396 A 19791203
DOCDB simple family (application)
EP 79300872 A 19790518; CA 305480 A 19780614; DE 2963466 T 19790518; JP 6230579 A 19790522