Transfer device for a press

A transfer device for a press machine, comprising:

• a first module in said transfer device;
• a second module in said transfer device;
• driving means for driving said first and said second modules in a sequence with said press machine;
• feeding means for feeding an external workpiece along a process direction of said press machine;
• said feeding means extending from a bottom side of said driving means;
• said feeding means cantilevered from a single side of said driving means;
• said first module operating said feeding means along said process direction;
• said second module operating said feeding means perpendicular to said process direction;
• said driving means operating said first and second modules in said sequence to transport said external workpiece along said process direction whereby a speed of said transfer device increases and said transfer device is simplified and reduced in cost and size;
• said driving means is disposed on a first side of said press machine;
• said first module operates said feeding means in a reciprocating advance-return motion along said process direction;
• said second module operates said feeding means in a clamp-unclamp motion perpendicular to said process direction;
• at least a first pair of feed bars in said feeding means;
• slider means for slidably directing said feeding means in said advance-return motion;
• at least a first bushing on said slider means;
• a slider on said slider means;
• said slider and said first bushing perpendicular to said feeding means;
• at least a first guide shaft slidably supporting said first bushing and said slider in said process direction;
• a first ball screw shaft;
• said first ball screw shaft extending parallel to said feeding means;
• a first nut on said slider;
• said first nut threadably engaging said first ball screw shaft;
• a first drive source in said first module;
• said first drive source rotatably engaging said first ball screw shaft;
• and
• said first nut rotatively directing said slider in said advance-return motion whereby said external work piece processes along said process direction.

A transfer device for a press which conducts multiple processing steps along a process direction, comprising:

• a drive mechanism;
• a pair of feed bars cantilevered from a single side of said drive mechanism;
• said feed bars cantilevered in said processing direction;
• said feed bars extending below said drive mechanism;
• said drive mechanism includes a first and second operating means;
• said first operating means for operating said feed bars along said processing direction in an advance-return motion;
• a second operating means for operating said feed bars perpendicular to said processing direction in a clamp-unclamp motion;
• said drive mechanism being disposed on a first side of said press;
• and
• said feed bars process an external workpiece along said processing direction whereby said transfer device is simplified and reduced in size.

A transfer device, for use in press that conducts pressing by a plurality of processing steps along a feed direction, comprising:

• a first and a second feed bar extending parallel to a feed direction;
• a plurality of drive modules connected to said feed bars;
• said plurality of drive modules being effective to drive said feed bars;
• said feed bars transporting a workpiece;
• said plurality of drive modules supporting only one end of said feed bars;
• a unit case that internalizes said drive mechanism modules;
• said unit case mounted on only one side surface of said press;
• and
• said unit case mounted above said feed bars whereby said transfer device is made smaller, at a reduced cost, while increasing precision and efficiency.

A transfer device, comprising:

• a first and a second feed bar extending parallel to a feed direction;
• a drive module connected to said feed bars;
• said drive module being of effective to drive said feed bars;
• said feed bars transporting a workpiece;
• said drive module supporting one end of said feed bars;
• a unit case that internalizes said drive mechanism module;
• said unit case on one side surface of said press;
• said unit case above said feed bars whereby said transfer device is made smaller, at a reduced cost, while increasing precision and efficiency;
• said drive module includes an advance-return drive module;
• said drive module includes a clamp-unclamp drive module;
• said advance-return drive module operating said feed bars along said feed direction;
• and clamp-unclamp drive module operating said feed bars perpendicular to said feed direction;
• said drive module permitting coordination of said advance-return drive module and said clamp-unclamp drive module whereby transfer device moves an external work piece along said feed direction;
• and
• a slider that slidably supports said feed bars in said feed direction;
• a bushing on said slider;
• a guide shaft slidably joined to said bushing and said slider;
• said guide shaft slidably supports said slider along said feed direction;
• a first ball screw shaft;
• a first nut on said slider;
• said first nut threadably engages said first ball screw shaft;
• and
• a first drive source rotatably controlling said first ball screw shaft and said slider whereby said advance-return drive module operates and transfers said external work piece along said feed direction.

A transfer device for a press machine which conducts processing along a process direction, comprising:

• a plurality of feeding means for feeding of an external workpiece along said process direction of said press machine;
• first module means for operating said plurality of feeding means along said process direction;
• second module means for operating said plurality of feeding means perpendicular to said process direction;
• driving means for operating of said first and said second module means in sequence with said press machine;
• said plurality of feeding means cantilevered from a single side of said driving means;
• said plurality of feeding means disposed at a bottom side of said driving means;
• and
• said driving means operating said first and said second module means in sequence to transport said external workpiece along said process direction whereby a speed of said transfer device is increased and said transfer device is simplified and reduced in cost and size.