Index table

An index table in which a rotating shaft (3) that supports a table (2), to which a workpiece (31) is secured, and that extends in a direction intersecting a vertical direction is index driven, the index table comprising:

• a rotating member (6) that is secured to the rotating shaft (3) or that is supported by a second shaft (4) differing from the rotating shaft (3), the rotating member (6) rotating by an amount that is the same as that of the rotating shaft (3) as a result of transmission of rotation of the rotating shaft (3) to the rotating member (6) through a rotation transmission mechanism (50);
• a supporting member (7) provided so as to be capable of reciprocating in a direction intersecting a center of axis of the rotating member (6);
• and
• an urging member (80) for the supporting member (7),
• wherein the rotating member (6) has an engaging portion (6a) that engages the supporting member (7) at a bias position separated from the center of axis,
• wherein the supporting member (7) has an engagement surface (7a) that receives, through the engaging portion (6a), a first rotary torque (T1) applied to the rotating shaft (3) by a weight supported by the rotating shaft (3), and
• wherein the urging member (80) causes a second rotary torque (T2) in a direction opposite to the first rotary torque (T1) to be generated at the rotating shaft (3) through the engaging portion (6a).