Manipulator

• US 4,842,476 A
• Filed: 05/02/1988
• Issued: 06/27/1989
• Est. Priority Date: 03/24/1988
• Status: Expired due to Fees

• Current Assignee: Star Seiki Co., Ltd.
• Original Assignee: Star Seiki Co., Ltd.
• Inventors: Shiotani, Yosuke
• Primary Examiner(s): Werner, Frank E.
• Assistant Examiner(s): Underwood, Donald W.
• Application Number:
  US07/190,477
• Time in Patent Office: 421 Days
• Field of Search: 414/749-753, 901/21, 74/99 R, 74/110, 74/109
• US Class Current: 414/751.1
• CPC Class Codes: B25J 9/023 Cartesian coordinate type
• CPC Class Codes: B65G 47/901 provided with drive systems with rectilinear movements only
• CPC Class Codes: Y10T 74/18992 Reciprocating to reciprocating

Abstract

A manipulator for moving a workpiece to a given position includes a supporting member, a driving member, a rotary member, a moving member, a speed change mechanism and a chuck member. The supporting member is so supported on a frame as to be movable in the moving direction of the workpiece. The driving member causes the supporting member to reciprocate. The rotary member makes a pair of first pulleys rotate with movement of the supporting member, the first pulleys being rotatably supported with a predetermined spacing on said supporting member. The moving member is connected to a pair of second pulleys rotatably supported with a predetermined spacing on the supporting member. The speed change mechanism is connected at least between one of the first pulleys and one of the second pulleys and moves the moving member by rotating the second pulleys at a given rotational frequency with respect to the first pulleys which rotate with movement of the rotary member. The chuck member mounted on the moving member serves to chuck the workpiece.

Claims

1. A manipulator for moving a workpiece to a predetermined position, comprising:

a supporting member so supported on a frame as to be movable in a moving direction of said workpiece;

a nut member fixed to said supporting member;

a feeding screw engaging with said nut member;

electromotive motor means connected with said feed screw for rotating said feeding screw so as to reciprocate said supporting member;

a pair of first pulleys rotatably supported with a given spacing on one side of said supporting member;

first timing belt means for connecting said pair of first pulleys, said first timing belt means partially fixed to said frame so as to rotate said first pulleys as said supporting member moves;

a pair of second pulleys rotatably supported with a predetermined spacing on the other side of said supporting member;

second timing belt means for connecting said pair of second pulleys;

at least one of said second pulleys coaxially connected with one of said first pulleys, said one of said second pulleys having an outside diameter ratio corresponding to a predetermined variable speed ratio for rotating said one of said second pulleys at a predetermined rotational frequency with respect to said first pulley as said first timing belt means moves; and

chuck means connected with said second timing belt means for chucking said workpiece.

2. A manipulator for moving a workpiece to a predetermined position, comprising:

a supporting member so supported on a frame as to be movable in a moving direction of said workpiece;

means mounted on said frame for reciprocating said supporting member;

a pair of first pulleys rotatably supported with a given spacing on one side of said supporting member;

first timing belt means for connecting said pair of first pulleys, said first timing belt means partially fixed to said frame so as to rotate said first pulleys as said supporting member moves;

a pair of second pulleys rotatably supported with a predetermined spacing on the other side of said supporting member;

second timing belt means for connecting said pair of second pulleys;

at least one of said second pulleys coaxially connected with one of said first pulleys, said one of said second pulleys having an outside diameter ratio corresponding to a predetermined variable speed ratio for rotating said one of said second pulleys at a predetermined rotational frequency with respect to said first pulley as said first timing belt means moves; and

chuck means connected with said second timing belt means for chucking said workpiece.