Abstract: First to Nth plate-shaped members (N: an integer not less than 3) are arranged at multiple stages. The plate-shaped member for a kth number counted from the first plate-shaped member is defined as a kth plate-shaped member (k: integers from 2 to N?1). The first plate-shaped member has a first wire support portion. The kth plate-shaped member has a kth through hole through which a (k?1)th wire support portion of the (k?1)th plate-shaped member penetrates. A (k?1)th wire suspending the kth plate-shaped member is provided at an upper part of the (k?1)th wire support portion penetrating through the kth through hole. A kth wire support portion is provided adjacently to the kth through hole in a predetermined rotational direction around a reference point on the kth plate-shaped member.

Abstract: An insulator is implemented such that a lower structure member to be brought into contact with a floor surface allows an upper structure member on which a piano is placed to be suspended through a cantilever spring member and a first wire, and a second wire connects the upper structure member and the lower structure member to each other in the horizontal direction, and the insulator thus functions so as to maintain intrinsic sound generated by the piano by free vibration in pendulum motion using the upper end of the first wire as a pivot, and richness of the sound is enhanced and transmission to a floor surface is inhibited, and, further, vibration caused by a key and a pedal being operated by a performer is reduced by elasticity of the cantilever spring member and the tensile force that acts on any of the second wires, and the performer does not feel uncomfortable with the operation.

Abstract: An insulator is implemented such that a lower structure member to be brought into contact with a floor surface allows an upper structure member on which a piano is placed to be suspended through a cantilever spring member and a first wire, and a second wire connects the upper structure member and the lower structure member to each other in the horizontal direction, and the insulator thus functions so as to maintain intrinsic sound generated by the piano by free vibration in pendulum motion using the upper end of the first wire as a pivot, and richness of the sound is enhanced and transmission to a floor surface is inhibited, and, further, vibration caused by a key and a pedal being operated by a performer is reduced by elasticity of the cantilever spring member and the tensile force that acts on any of the second wires, and the performer does not feel uncomfortable with the operation.