Stair are marked time to open and are prevented chute equipment

The utility model discloses a stair are marked time to open and are prevented chute equipment, including smearing the board, the bottom of smearing the board is provided with the at least fluting module parallel with the long limit of smearing the board, the cross -section of fluting module is unanimous with the cross sectional shape in anti -skidding groove, the vertical fixation is gone back to the bottom of smearing an arbitrary length of branch limit of board has a locating plate, this locating plate with smear board cooperation centre gripping outside the external corner that stair were marked time. The utility model discloses an opening and preventing that chute equipment sets up the locating plate in the bottom on one of them length of branch limit of smearing the board, when using, utilize the locating plate and smear the plate holder and hold stair and mark time, the external corner that stair were marked time is aimed at to the contained angle, removes and smears the board, and smearing the fluting