SPLASH GUARD FOR MAIN SPINDLE MOVING TYPE MACHINE TOOL

PROBLEM TO BE SOLVED: To provide a splash guard for a main spindle moving type machine tool which covers a machining area with a simple structure without providing a driving device, resulting in a smaller area for installing the entire machine tool. SOLUTION: The splash guard 6, forming an opening 35 through which a main spindle table 4 can pass while moving and capable of covering the opening 35 when the main spindle table 4 has moved to the machining area 7, comprises an expansion sheet part 37 comprising a first cover 41 and a second cover 42, the first cover 41 comprising a first slide-contact surface which is fixed to a saddle 13 moving in a direction of the X-axis, moves in a direction of the X-axis with the saddle 13 and is provided in extension in a direction orthogonal to a plane containing the opening 35, the second cover 42 being provided with a second slide- contact surface parallel to the first slide-contact surface, the second cover 42 sliding in a direction of the X-axis relative to the first cover 41 and covering the opening 35 when the opening 35 and the second slide-contact surface slide-contacts, a pull spring 45 always biasing the second cover 42 relatively in a direction of the machining area 7, and a restricting means 46 for restricting a moving action of the second cover 42 against the spring force when the main spindle table 4 has moved to the machining area 7 and for locking the second cover 42 at a predetermined position, in which the second slide-contact part covers the opening 35.