Patent ID: 8056487
Filing Date: 2011-11-15
Classification: B23Q,Y10T

Abstract:
1. A tilting table device including a body frame, a table, and a tilt shaft which is rotationally driven to tilt the table, the tilt shaft being rotatably supported by the body frame, the table being supported by the body frame via the tilt shaft, the tilting table device comprising: a first rotary member which is fixed to the tilt shaft or a shaft rotated by the tilt shaft, and hence is rotated by a rotation amount equivalent to that of the tilt shaft when the rotation of the tilt shaft is transmitted; a second rotary member which has an axis parallel to that of the first rotary member, is connected to the first rotary member, and is rotated by a rotation amount equivalent to or substantially equivalent to that of the first rotary member in a direction opposite to that of the first rotary member when rotation of the first rotary member is transmitted; a first retaining member provided on a surface of the first rotary member extending in a direction intersecting with the axis of the first rotary member; a second retaining member provided on a surface of the second rotary member extending in a direction intersecting with the axis of the second rotary member, the second retaining member being arranged such that a distance between the second retaining member and a rotation center of the second rotary member is equivalent to or substantially equivalent to a distance between the first retaining member and a rotation center of the first rotary member; and an urging device connected to the first and second rotary members respectively through the first and second retaining members, wherein, the first and second rotary members are connected to each other such that, when a center of gravity of the table is located at an uppermost position or a lowermost position, the first and second retaining members are in a phase in which the first and second retaining members are located on or near a line connecting the rotation centers of the first and second rotary members and the first and second retaining members are in a phase in which the first and second retaining members are provided inside or outside with respect to the two rotation centers, and wherein the urging device causes a constant urging force that is an urging force in a direction in which a torque applied to the tilt shaft is reduced, to be applied between the first and second retaining members by movement of the center of gravity of the table from the uppermost position or the lowermost position as a result of the rotation of the tilt shaft.