Patent ID: 7127930

Claim:
A pressing apparatus comprising pressing dies that are relatively movable in a pressing direction, each of the pressing dies having (1) a pressing-tooth holder with a recess having a bottom wall surface, (2) a pressing tooth disposed in the recess and (3) a wedge member for fixing the pressing tooth in the recess, and wherein: in each of the pressing dies, the pressing tooth and the wedge member slidably abut against each other at parting faces parallel to the pressing direction; each wedge member (1) has a first inclined surface inclined at an acute angle a with respect to the pressing direction, so that the wedge member narrows in a direction toward the bottom wall surface of the recess, and (2) slidably abuts, at the first inclined surface thereof, against a first inner wall surface of the recess; each pressing tooth (1) has a second inclined surface inclined at an acute angle β with respect to the pressing direction, so that the tooth widens in a direction toward the bottom wall surface of the recess, and (2) slidably abuts, at the second inclined surface, against a second inner wall surface of the recess; and wherein in each of the pressing dies, the wedge member, when subjected to a load F 1 in a direction toward the bottom wall surface of the recess, (1) pushes against the pressing tooth with a reaction force Fx in a direction perpendicular to the parting faces, the reaction force Fx resulting from force applied to the first inclined surface of the wedge member by the first inner wall surface of the recess, and (2) produces a reaction force Fy that urges the pressing tooth toward the bottom wall surface of the recess, to fix the pressing tooth in the recess, the reaction force Fy resulting from force applied to the second inclined surface of the pressing tooth by the second inner wall surface of the recess.