| 摘要 |
When projection plates of fixture blocks installed on a display apparatus body are inserted into installation windows in left blocks installed on a rail in a ceiling portion, the projection plates are locked and do not come out, whereby the display apparatus body does not drop even when a worker releases his hands therefrom. Hence, the worker can carry out cable connection work with free both hands. Furthermore, to the configuration of a conventional fixture device, a spring washer 18 and a sleeve 19 are added between a screw 16 and a nut plate 14, whereby when the screw 16 is tightened at an improper position, a clearance Z occurs between the tightened screw 16 and a block 13, thereby allowing the screw 16 to move up and down. Hence, if the fixing is improper, a rattle occurs, whereby it is possible to find an improper installation state. The display apparatus body is provided with a latch section having projection sections to be fitted into the recessed section formed in the display section. This latch section has an upper latch and a lower latch configured so as to engage each other with balls held therebetween, and when the upper latch is pressed by the display section and moves, the lower latch engaging the balls also moves . When the lower latch is pressed by the display section and moves, the balls roll inside the slots in the upper latch, whereby the upper latch is configured so as to move after the lower latch has moved by a predetermined distance. <IMAGE> |
