Hitachi, Ltd.

Hitachi Global Storage Technologies Japan, Ltd.

Shizuo Yamazaki

Tomoaki Sakata

Keisuke Yamaoka

Hiroshi Kato

Tsutomu Kuse

Mikio Rachi

Keiko Watanabe

Tetsuya Hamaguchi

Takashi Matsuki

Makoto Horisaki

Youichi Kusagaya

Hiroshi Kawaguchi

Katsumi Watanabe

Kenji Tomida

The center of rotation of a disk mediumwhen servo information is written thereto coincides as accurately as possible with its center of rotation in the drive into which the disk mediumis assembled. The magnetic disk mediumis fixed to a spindle hub. A centering pinof a push-aside mechanismpushes aside the magnetic disk mediumwith respect to the center of the spindle hubuntil the disk-to-hub gap is moved to one side. Then, with a centering pinof a come-back mechanismplaced in the same line intersecting with the center of the spindle, the magnetic disk mediumis pushed back to the opposite side.

Servo pattern writing method and apparatus thereof

An object of the invention is to provide a method of assembling a disc which can reduce an unbalance of a rotating portion. The method of assembling a disc-like recording medium has a first step of mounting a disc-like recording medium to a disc apparatus in a state capable of moving the disc-like recording medium with respect to a hub of a spindle motor in a direction of a disc radius, a second step of pressing an outer diameter of the disc in a direction of a center axis of the hub by a first flat member so as to bring an inner diameter of the disc into contact with an outer diameter of a rotary axis of the hub, a third step of pressing back the outer diameter of the disc contact with the first flat member and the outer diameter of the disc at an opposite position to the center of the disc in an inverse direction to a pressing direction of the first flat member to a half of an amount of tolerance between the inner diameter of the disc and the outer diameter of the hub, by a second flat member placed substantially in parallel to the first flat member and in an opposite side to the center axis of the hub, and a fourth step of fixing the disc to the spindle motor hub by a clamp member.

Method for assembling disc apparatus

An automatic assembling system for assembling a product constituted by a plurality of parts, includes a group cell having a plurality of assembling cells and inspecting cells, pallets loaded with the same type of parts or products, at least one buffer for holding a plurality of pallets, and at least one pallet hand-over mechanism for transferring pallets between the buffer and each cell. At least one of the buffers is provided in common for a plurality of cells, and at least one of the pallet hand-over mechanisms is provided to the common buffer.

Automatic assembling system

Growing community of inventors

Odawara, Japan

Shizuo Yamazaki