PURPOSE:To enhance reliability in keeping of a secret article by constituting a system in such a way that a secret article keeping shelf is connected to a work area by means of a sealed space and that an open/close door to the work area can be opened/closed only when the opening to the work area is closed by a box for custody. CONSTITUTION:According to instructions from a work table 29, a designated box 14 for custody is taken out by a stacker 9 from a small space 8 in a shelf, then shifted over a traveling carriage 18, and carried to a work table 29 through a sealed connecting passage 6. Then, the box 14 is shifted over a lifter (not illustrated here) of the work table 29 and then lifted. When an opening C1 is closed by the box 14 for custody that has arrived at the position of the opening C1, an opening/closing door 53 comes to be able to be released. Thus, one can open the box 14 to take out an article in custody therefrom by using a key. When he is through with it, he puts the box 14 back in place and closes the door 53. Further, he gets the work table 29 to output instructions for taking-in so that the box 14 is carried back to the small space 8 in the shelf. With this constitution, the opening/closing door can be opened or closed only when the box 14 closes the opening of the work table, thereby enhancing reliability.
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