Patent ID: 8973306
Filing Date: 2015-03-10
Classification: E05F,E05Y

Abstract:
1. A two-stage linked sliding door of a machine tool, the sliding door comprising: a first door half movable through a predetermined stroke and a second door half movable through a stroke shorter than that of the first door half to open and close an opening in a fixed cover of the machine tool; two pulleys disposed respectively at opposite end portions of the second door half; a wire stretched between the two pulleys; a wire tensioning portion which secures both opposite first and second end portions of the wire, respectively through two elastic members of the wire tensioning portion, to one of a door frame on the fixed cover and the first door half, the two elastic members respectively pulling the opposite first and second end portions of the wire to provide a tension in the wire; and a wire intermediate portion fixing member which secures an intermediate portion of the wire between the two pulleys to the other of the door frame and the first door half, wherein the two elastic members are juxtaposed and offset with each other so that respective central axes of the two elastic members do not lie on the same axis, the wire intermediate portion fixing member is provided with a member configured to stagger the wire in a direction in which the first and second door halves are overlapped, the wire has a first section extending between the wire intermediate portion fixing member and the first end portion secured to one of the elastic members, and a second section extending between the wire intermediate portion fixing member and the second end portion secured to the other one of the elastic members, and the member of the wire intermediate portion fixing member is configured to stagger the first section and the second section of the wire so that the first section and the second section of the wire extend parallel to each other and to a direction of movement of the first and second door halves.