A closure locking design is presented that is more resistant to a displacement/dislodgement force. A closure end strip is fixed to a closure end and received by a closure guide first section. A rotatable tube and hook assembly run vertically within a closure guide second section. When rotated to a locking position a hook member of the tube and hook assembly rotates through a slot cut in the guide and through a cutout in the closure end strip to restrictively engage the closure.

A freezer blast cell fabric roll up door is disclosed, wherein the freezer blast cell fabric roll up door is built to reliably withstand the high velocity wind loads and harsh freezing environments of a blast freezer. In one example, the presently disclosed freezer blast door comprises a drive or main assembly that further comprises a head plate bracket assembly, a brush bar assembly, a barrel assembly, a guide assembly, and a curtain assembly.

A roll-up type industrial door including a flexible sheet or woven fabric forming a curtain for closing a door way having an upper end, a lower end and two opposite side edges. The sheet has a main area and elongate side edge sections that are thicker than the main area. A shoulder is formed where each side edge section meets the main area. A curtain winding mechanism is connected to the upper end of the curtain and is used to raise the curtain. A pair of spaced apart guide channels are also provided and the side edge sections are movable therein. Each guide has one or two elastic members which act as locking blades. The locking blades of each guide form an elongate slot that receives a side edge section of the curtain.

The present invention discloses a rolling shutter door railing, including a connecting mechanism for connecting with the free end of rolling shutter, the connecting mechanism includes a column and a seat on the column, the column can be vertically fixed to the installation position through the seat, and the length of the column fits the overall height of the rolling shutter door railing; the simple structure in the present invention can be directly installed, without any positioning installation based on the position of the rolling shutter. Compared to traditional structures, the present invention has optimized the installation process and effectively improved the installation convenience of rolling shutter door railing.

The present invention discloses a rolling shutter door fence, including a connecting mechanism for connecting with the free end of the roller shutter, the connecting mechanism includes a column and a base provided for the column, the column can be vertically fixed to the installation position through the base, the length of the column, which of course can also be longer, fits with the overall height of the rolling shutter door fence, the present invention having a simple structure allows for direct installation without positioning according to the position of the roller shutter and, compared with traditional methods, optimizes the overall installation process of the roller shutter door fence and effectively improves the installation convenience of the roller shutter door fence.