Fusion splice machine

A fusion splicing machine comprising:

• an optical fiber holder holding an optical fiber in a state where a tip end of the optical fiber protrudes;
• a rotation mechanism arranged on an opposite side of the optical fiber holder to the tip end of the optical fiber and rotating the optical fiber holder around an axis extending along the optical fiber;
• a clamp unit pressing the tip end portion of the optical fiber held by the optical fiber holder;
• and
• a holder base mounting the optical fiber holder and fixed to the rotation mechanism,
• wherein the rotation mechanism rotates the optical fiber, the optical fiber holder, the clamp unit, and the holder base around a Z-axis extending along the optical fiber,
• wherein the clamp unit, the holder base, and the optical fiber holder are within a range closer to a central axis of the rotation mechanism than an outer periphery of the rotation mechanism when viewed from a direction of the Z-axis,
• wherein the optical fiber holder has a first end portion positioned at a side opposite to the rotation mechanism,
• wherein the holder base has a second end portion positioned at the side opposite to the rotation mechanism, and
• a distance from the rotation mechanism to the second end portion in a direction in which the optical fiber extends is shorter than a distance from the rotation mechanism to the first end portion in the direction in which the optical fiber extends,
• wherein the optical fiber holder has a V-groove on which the optical fiber is placed, and
• wherein the clamp unit comprises a fixed part fixed to the holder base, an extending part extending in a width direction of the holder base from an end portion of the fixed part on a side opposite to the holder base, and a pressing part extending along the V-groove from the extending part.