Patent ID: 7818921

Claim:
A through section shielding construction comprising: a penetrating member; a partitioning wall defining a slit opening extending along a lateral direction as a passage for movement of the penetrating member relative to the partitioning wall, and a plurality of shielding plates for closing the slit opening, the plurality of shielding plates being juxtaposed along the slit opening and suspended pivotally to be pushed open one after another by the penetrating member moving along the slit opening; wherein the shielding plates are provided as adjacent pairs, and there is provided an operative coupling mechanism for operatively coupling, with each other, two shielding plates constituting said each pair in such a manner that in association with one of the paired shielding plates being pushed open in one direction by the penetrating member, the other shielding plate is pivotally opened in the opposite direction to said one direction, further comprising a movable shielding plate attached to said penetrating member, the movable shielding plate shielding a portion of the slit opening where the shielding plate is opened by the penetrating member.