Coiler device and gate device provided with guide unit

A gate device provided with a guide unit, wherein

• a guide unit disposed on a downstream side of a pinch roller in a pass line on which a metal strip is conveyed, the guide unit being configured to open and close a winding line bent from the pass line, and to guide an upper surface side of the metal strip introduced into the winding line, and wherein
• the guide unit includes
• a body frame, and
• a liner being attached to the body frame, constituting at least part of a guide surface to guide the metal strip, and having a lower friction coefficient than a friction coefficient of the body frame and a lower hardness than a hardness of the metal strip;
• and wherein
• the liner comprises:
• a first liner detachably attached to an upstream side of the body frame in the winding line;
• and
• a second liner detachably attached to a downstream side of the body frame in the winding line, and having a larger thickness than a thickness of the first liner.