(19)
(11) EP 1 247 597 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.10.2002 Bulletin 2002/43

(43) Date of publication A2:
09.10.2002 Bulletin 2002/41

(21) Application number: 02013386.4

(22) Date of filing: 28.05.1998
(51) International Patent Classification (IPC)7: B21D 43/05, B21D 43/06, B21D 55/00, B30B 15/28, B30B 1/26
(84) Designated Contracting States:
GB IE NL

(30) Priority: 28.05.1997 JP 13856197

(62) Application number of the earlier application in accordance with Art. 76 EPC:
98304214.4 / 0881046

(71) Applicant: Apic Yamada Corporation
Hanishina-gun, Nagano 389-0898 (JP)

(72) Inventor:
  • Uchiyama, Shigeyuki
    Hanishina-gun, Nagano 389-0898 (JP)

(74) Representative: Pearce, Anthony Richmond 
MARKS & CLERK, Alpha Tower, Suffolk Street Queensway
Birmingham B1 1TT
Birmingham B1 1TT (GB)

   


(54) A motor-operated press machine


(57) A motor-operated press machine has a support table (140) and a rocking link (126) which is attached at a middle portion to said support table (140) by a supporting shaft (124), and which is rockable about said supporting shaft (124). A crank (120) has a crank shaft (122) serving as a support shaft is rotatably supported on one end portion of the rocking link (126). A press ram (114) is linked to the crank (120) and is vertically reciprocated by rotating said crank (120). A driving unit (154) is coupled to another end portion of the rocking link (126) to rock the rocking link (126) about the supporting shaft (124) so as to vertically move said press ram (114). In a usual press working operation, the driving unit (154) regulates said rocking link (126) to a lateral position with respect to a position above said press ram (114) so that said supporting shaft (124) is on a first straight line (A) which laterally elongates from said crank shaft (122) with respect to a moving direction of said press ram (114). In a resetting operation after jamming or an emergency during a working operation, the driving unit (154) lowers said other end portion of the rocking link (126) to upward move the press ram (114) to a retracting position above a position where the press ram (114) is located in the usual press working operation.






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