Gateway closing device

The invention discloses a gateway closing device. The gateway closing device comprises a locking mechanism. The locking mechanism comprises locking discs and a clamping stop part matched with the locking discs to play a role in locking. The locking discs include the upper disc and the lower disc, the upper locking disc is the first locking disc, and the lower locking disc is the second locking disc. The clamping stop part includes an upper part and a lower part, wherein the upper clamping stop part is the first clamping stop part, the lower clamping stop part is the second clamping stop part, the first clamping stop part comprises an arc structure, the length of the arc is equal to the space width of the first locking disc, the second clamping stop part is an elastic plate movably connected with the clamping stop part and a fixing structure used for fixing the second clamping stop part and the elastic plate, and the fixing structure is fixed to the lower surface of an upper supporting structure through the upper surface. The second clamping stop part comprises a U-shaped body, a groove body and an elastic part, the U-shaped body is located in the groove body, and the elastic part is located between the tail of the U-shaped body and the inner wall of the groove body.