An opening and closing body includes a plurality of rod-shaped members, and a plurality of coupling members configured to couple the plurality of rod-shaped members. Each of the coupling members includes a pair of fitting parts that are spaced apart in a guide direction and configured to be fitted to a coupling target pair of rod-shaped members that are adjacent to each other in the guide direction. Each of the fitting parts includes a cover part having flexibility and configured to cover a range of an outer circumferential surface of the fitted rod-shaped member, the range being smaller than a circumference of the outer circumferential surface and larger than half the circumference as viewed in a first direction.

In some embodiments, a nesting grille may include an alpha link having a top alpha link grommet, a beta link, and a plurality of cross members. In some embodiments, each of the plurality of cross members are coupled to at least one of the alpha link and the beta link. In one embodiment, the top alpha link grommet is configured to receive one of the plurality of cross members. In one embodiment, the grille is configured to be moveable between an extended state and a retracted state, the grille coiled about itself with the alpha link disposed inside of the beta link when the grille is in the retracted state.

In some embodiments, a nesting grille may include an alpha link having a top alpha link grommet, a beta link, and a plurality of cross members. In some embodiments, each of the plurality of cross members are coupled to at least one of the alpha link and the beta link. In one embodiment, the top alpha link grommet is configured to receive one of the plurality of cross members. In one embodiment, the grille is configured to be moveable between an extended state and a retracted state, the grille coiled about itself with the alpha link disposed inside of the beta link when the grille is in the retracted state.

A retractable barrier system for inhibiting access to designated private and public areas both indoors and outdoors, including by way of example but not limitation, retail and warehouse aisles and the like, includes a flexible screen retractable and extensible from a rotatable rod coupled to a mounting member, the mounting member having an attachment mechanism for coupling with a receiving member, wherein a winding mechanism is coupled to the rotatable rod for retractably receiving and extending the flexible screen, the flexible screen is comprised of material having a sufficient modulus of elasticity to promote substantially smooth retractably receiving thereof and may further include tapering between ends thereof, and the winding mechanism may include a guide member having a surface of sufficient diameter oriented substantially perpendicular to the flexible screen to guide the flexible screen upon retractably receiving the screen.

A retractable barrier system for inhibiting access to designated private and public areas both indoors and outdoors, including by way of example but not limitation, retail and warehouse aisles and the like, includes a flexible screen retractable and extensible from a rotatable rod coupled to a mounting member, the mounting member having an attachment mechanism for coupling with a receiving member, wherein a winding mechanism is coupled to the rotatable rod for retractably receiving and extending the flexible screen, the flexible screen is comprised of material having a sufficient modulus of elasticity to promote substantially smooth retractably receiving thereof and may further include tapering between ends thereof, and the winding mechanism may include a guide member having a surface of sufficient diameter oriented substantially perpendicular to the flexible screen to guide the flexible screen upon retractably receiving the screen.

In some embodiments, a nesting grille may include an alpha link having a top alpha link grommet, a beta link, and a plurality of cross members. In some embodiments, each of the plurality of cross members are coupled to at least one of the alpha link and the beta link. In one embodiment, the top alpha link grommet is configured to receive one of the plurality of cross members. In one embodiment, the grille is configured to be moveable between an extended state and a retracted state, the grille coiled about itself with the alpha link disposed inside of the beta link when the grille is in the retracted state.

In some embodiments, a nesting grille may include an alpha link having a top alpha link grommet, a beta link, and a plurality of cross members. In some embodiments, each of the plurality of cross members are coupled to at least one of the alpha link and the beta link. In one embodiment, the top alpha link grommet is configured to receive one of the plurality of cross members. In one embodiment, the grille is configured to be moveable between an extended state and a retracted state, the grille coiled about itself with the alpha link disposed inside of the beta link when the grille is in the retracted state.

A retractable curtain system is provided and includes a curtain support system, a curtain, and a retraction system. The curtain support system includes a pair of outer walls and an upper frame to provide a curtain receiving space. The curtain covers the curtain receiving space and includes a first non-transparent panel and transparent panel connected to the first non-transparent panel. The retraction system is connected to the curtain to lower and raise the transparent panel.

The invention provides a guide rail device (10) for laterally guiding a rolling door or rolling grille armor (68) of a rolling door or rolling grille (11), comprising a guide rail (12) for vertically guiding the rolling door or rolling grille armor (68), an infeed funnel (22) for guiding the rolling door or rolling grille armor (68) into an entry area of the guide rail (12), with the infeed funnel (22) being movable relative to the guide rail (12), and comprising a damping body (34) connected to the infeed funnel (22) which dampens vibrations and shocks of the infeed funnel. The invention further provides a rolling door or rolling grille (11) comprising a first guide rail device and a second guide rail device, wherein the guide rail (12) of the first guide rail device (10) is fixed laterally on the building opening to be locked with the rolling door or rolling grille and the guide rail (12) of the second guide rail device is fixed laterally on the opposite side of the building opening to be locked with the rolling door or rolling grille (11).

Disclosed is a safety gate that includes a first fixing mechanism, a second fixing mechanism, a connection mechanism, a return spring, a screen rolling tube, and a rollup screen operative to be wound on the screen rolling tube. One end of the screen rolling tube is provided with a first mounting mechanism, and the other end is provided with a second mounting mechanism. One end of the return spring passes through the screen rolling tube to be fixedly connected to one end of the rollup screen, and the other end of the return spring is fixedly connected to the first mounting mechanism. A locking mechanism is provided in the second mounting mechanism for locking or unlocking the screen rolling tube, and is fixedly connected to the screen rolling tube. The other end of the rollup screen is provided with a handle mechanism.