A fire-detecting device has first and second stressed brackets plugged together. The far ends of the first and second stressed brackets both have a towing hole. A disintegrable temperature-sensing device is between the first and second stressed brackets. First and second fixing pins are in the first and second brackets, respectively. The first fixing pin is located on one side of a free-moving piece and the second fixing pin is located on the other side thereof. A guide groove is in the first stressed bracket to correspond to the second fixing pin. A guide recess is in the second stressed bracket. A stressed shaft is in the second stressed bracket. An extension part having a stressed groove is in the first stressed bracket. When the disintegrable temperature-sensing device cracks off due to high temperature, the two stressed brackets will separate, leading to the fire dampers' shutting.

A fire protection fastening device for fastening a door actuator, includes a frame with a back side, which is to be oriented to a mounting surface, in particular to a door, casing or wall, wherein a mounting axis is defined vertically to the back side. The frame is formed for arrangement between a door actuator and the mounting surface or is an integral component of the door actuator (102), at least one reaction chamber formed in the frame, wherein the frame delimits the reaction chamber on the entire circumference. The reaction chamber is open on the back side and/or on a front side of the frame opposite the back side. The device further includes a drive element made from thermally intumescent material disposed in the reaction chamber and, when activated, is formed for pushing away the door actuator from the mounting surface.

A sliding door system may satisfy the requirements of, and be fire-rated in accordance with, UL10B (“Standard for Fire Tests of Door Assemblies”), and/or satisfy the requirements of, and be pressure-rated in accordance with, UL10C (“Standard for Positive Pressure Fire Tests of Door Assemblies”).

A fire protection fastening device for fastening a door actuator, includes a frame with a back side, which is to be oriented to a mounting surface, in particular to a door, casing or wall, wherein a mounting axis is defined vertically to the back side. The frame is formed for arrangement between a door actuator and the mounting surface or is an integral component of the door actuator (102), at least one reaction chamber formed in the frame, wherein the frame delimits the reaction chamber on the entire circumference. The reaction chamber is open on the back side and/or on a front side of the frame opposite the back side. The device further includes a drive element made from thermally intumescent material disposed in the reaction chamber and, when activated, is formed for pushing away the door actuator from the mounting surface.

A fire door includes: an outer frame; a door body; and a center rail, the center rail is provided so as to overlap a target area in a wall orthogonal direction view, and so as to extend in a width direction between a first frame portion and a second frame portion on the side opposite to the wall body with respect to the target area, the center rail and the first frame portion are fixed to each other, the center rail and the second frame portion are engaged with each other with an engaging mechanism interposed therebetween, and the engaging mechanism is configured to allow relative movement of the center rail relative to the second frame portion in the width direction, and to regulate the relative movement thereof in the wall orthogonal direction and a slide direction.

A sliding door system may satisfy the requirements of, and be fire-rated in accordance with, UL10B (Standard for Fire Tests of Door Assemblies), and/or satisfy the requirements of, and be pressure-rated in accordance with, UL10C (Standard for Positive Pressure Fire Tests of Door Assemblies).

A safety device for closures that comprises, a casing (6) that can be fastened in a closure, a bolt (4) that is movable inside the casing (6), a stop (4.1) that is integral to the bolt (4), a seal (2) arranged in a fixed manner with respect to the casing (6), a spring (5) in contact with the stop (4.1) and arranged in a compressed manner in the casing (6) due to the effect of the seal (2); wherein the seal (2) is made of a material that is configured to change state at a preset temperature, such that when it changes state, the spring (5) is free to move the bolt (4), passing through the seal (2) until it projects outside the casing (6).

A fire protection securing apparatus for securing a door actuator includes a retaining plate, designed for being secured to an assembly surface, in particular door, frame or wall, wherein, perpendicular to the retaining plate, an assembly axis is defined. The fire protection securing apparatus further includes an assembly plate which is secured to the retaining plate and which is designed for receiving the door actuator, and at least one closed reaction chamber arranged between the retaining plate and the assembly plate. The apparatus also includes a drive element of thermally intumescent material which is arranged in the reaction chamber and which is designed to push the assembly plate away from the retaining plate upon thermal activation.

A fire-detecting device has first and second stressed brackets plugged together. The far ends of the first and second stressed brackets both have a towing hole. A disintegrable temperature-sensing device is between the first and second stressed brackets. First and second fixing pins are in the first and second brackets, respectively. The first fixing pin is located on one side of a free-moving piece and the second fixing pin is located on the other side thereof. A guide groove is in the first stressed bracket to correspond to the second fixing pin. A guide recess is in the second stressed bracket. A stressed shaft is in the second stressed bracket. An extension part having a stressed groove is in the first stressed bracket. When the disintegrable temperature-sensing device cracks off due to high temperature, the two stressed brackets will separate, leading to the fire dampers' shutting.

A door body includes a door main body, an upper guided portion provided to an upper portion of the door main body, and a lower guided portion provided to a lower portion of the door main body. A guide member includes an upper guide portion, a lower guide portion, and a restricting portion. The upper guide portion supports the upper guided portion from below while restricting movement of the upper guided portion along the fore and aft direction. The lower guide portion supports the lower guided portion from below while restricting movement of the lower guided portion along the fore and aft direction. The upper guided portion is moved upwardly away from the upper guide portion in the expanded support state. The restricting portion restricts movement of the door main body in the first direction in the expanded support state, and restricts movement of the door main body in the second direction in the expanded support state.