| 摘要 |
PURPOSE:To produce a door, which can be turned by means of hinges, so that the door can resist internal pressure by arc accidents, etc., by mounting lock plates, which can slide on an inner surface of the door, and lock pieces, which can be inserted into or demounted from the lock plates, to this enclosed switchboard provided with the door. CONSTITUTION:Lock plates 9, 9' are unified at the inside of a door 2, which is supported in a rotation-possible shape by means of hinges 4, by means of a connecting plate 10, and fixed up and down in sliding-free forms by means of a connecting plate guide 10a. The lock plates 9, 9' are slide up and down by operating a handle by means of a wire 12. Cylinder portions 13 are formed to both ends of the lock plates 9, 9', and the cylinder portions 13 are connected to lock pieces 16 shaped to a main body. Consequently, the lock plates 9, 9' are pulled down by means of the handle and the cylinder portions 13 and the lock pieces 16 are connected after closing the door 2, thus strengthening combination between the main body and the door 2, then preventing the opening of the door 2 due to the rise of internal pressure. |
