Press machine

• US 4,648,786 A
• Filed: 12/09/1982
• Issued: 03/10/1987
• Est. Priority Date: 12/15/1981
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Komatsu Seisakusho (Komatsu Ltd.)
• Original Assignee: Kabushiki Kaisha Komatsu Seisakusho (Komatsu Ltd.)
• Inventors: Sakurai, Terushige
• Primary Examiner(s): NOT, DEFINED
• Application Number:
  US06/448,173
• Time in Patent Office: 1,552 Days
• Field of Search: 901/16, 901/40, 901/41, 901/30, 414/752, 414/736, 414/121, 414/222, 198/486, 198/462
• US Class Current: 198/468.3
• CPC Class Codes: B21D 43/05 specially adapted for multi-stage presses B21D43/145 takes precedence
• CPC Class Codes: B21D 43/057 Devices for exchanging transfer bars or grippers; Idle stages, e.g. exchangeable
• CPC Class Codes: B21D 43/105 Manipulators, i.e. mechanical arms carrying a gripper element having several degrees of freedom

Abstract

A press machine has a transfer device for transferring blanks to be machined from a blank supply station to a blank machining station. The transfer device includes a rail extending in the longitudinal direction of a bed of the press machine and mounted in front of a press machine body through brackets fixedly secured, respectively, to side faces of the press machine body, a main body located in front of the press machine body so as to be movable along the rail, a lift member mounted on the main body so as to be movable in the vertical direction, a transfer unit fitted to the lift member so as to be movable back and forth with respect to the press machine body, and drive units for driving the main body, lift member and transfer unit, respectively.

Claims

1. A transfer device for use in a press machine to infeed workpieces for work, to advance workpieces from one workstation to another, and to outfeed finished workpieces comprising:

a longitudinal extending rail mounted in front of a body of said press machine by means of brackets fixedly secured, respectively, to side faces of said press machine body, said brackets being arranged to project outwardly along said side faces;

a main body located in front of said press machine body and movable along said rail;

a lift member mounted on said main body so as to be movable in a vertical direction;

a transfer means fitted to said lift member so as to be movable backwardly and forwardly with respect to the longitudinal direction of said press machine body to infeed workpieces for work, to advance workpieces from one workstation to another, and to outfeed finished workpieces, said transfer means including holder means and a plurality of transfer members arranged in spaced-apart relation in a longitudinal direction of a bed of said press machine and mountable in said holder means, said plurality of transfer members consisting of two groups of said transfer members, a first group of which is adjustable along said longitudinal direction of said bed with respect to a second group such that the space interval between one of said groups with respect to the other is adjustable as said main body is moved along said rail, whereby said transfer means can provide a different length of infeed transfer and a different length of outfeed transfer during a single longitudinal stroke, while maintaining the ability to transfer workpieces from one workstation to another, all in a direction along the longitudinal direction of said press bed, at least one of said transfer members being detachably stowable on said press machine body so as to be freely attachable and detachable to said transfer means by moving said holder means backwardly and forwardly with respect to said press machine body; and

drive means for driving said main body, said lift member and said transfer means respectively.

2. The transfer device according to claim 1, further comprising a plurality of storage shelves provided externally of one of said side faces of said press machine body, said storage shelves being adapted to each house one of said plurality of transfer members, said housed transfer members each being different in shape and arranged on said shelves at predetermined vertical intervals whereby said holder means may be aligned with said storage shelves and moved backwardly and forwardly with respect to said press machine body for attachment and detachment of said transfer members to said holder means.