Action for upright piano

摘要

Disclosed is an action for an upright piano capable of expressing rich tone variation and improving the continuous press performance of the same key. In the action (1) for an upright piano, there are formed a guide member (67) fixed to a center rail (14) and continuing in the horizontal direction; and a member to be guided (73) sliding along the guide member (67). A hammer under rail (19) on which a hammer shank (45) abuts is affixed to a hammer rail (18), and butt flanges (41) are affixed to the member to be guided (73). The member to be guided (73) is connected to a pedal (77) via an upthrust bar (81) and a balance (79) such that the member to be guided (73) is slid to the right or left with the force of working the pedal (77) by the player.

主权项

1. An action of an upright piano comprising:
a key, an action rail extending horizontally in the right-and-left direction from the perspective of a piano player's side, a whippen rotatably supported by the action rail and located on a rear end of the key, a jack rotatably supported by the whippen, a hammer butt to be pushed up by the jack, a hammer supported by the hammer butt, and a string to be hit by the hammer; a guiding member that extends longitudinally along said action rail and is secured to a surface of said action rail; a guided member that is slidable along said guiding member, said hammer butt being rotatably supported by a hammer-butt flange, the hammer-butt flange being secured to the guided member, with the guided member disposed between the hammer-butt flange and the guiding member, and with the guiding member disposed between the guided member and the surface of the action ran, wherein said guided member is connected to a pedal rod via a joint member, the pedal rod being connected to a pedal; and an elastic member that biases said guided member in a right or left direction from the perspective of the piano player's side, wherein a force applied by a piano player to said pedal acts on said guided member through said pedal rod and said joint member, the force acting on said guided member having a direction that is opposite to the direction of a bias force applied by said elastic member.