KR-102962070-B1 - Heat-Insulating Door and Fire-Rated Glazed Door for Exterior Observation Comprising the Same

Abstract

The present invention relates to a fireproof glass door for external viewing that prevents heat from entering between the door and the door frame in the event of a fire by providing a heat-insulating frame and a step between the upper front side and the upper rear side, and delays heat transfer between the front and rear sides of the door leaf while allowing observation of the outside from the inside.

Inventors

• 김성배
• 김종원

Assignees

• 세기에프에스디(주)

Dates

Publication Date

20260511

Application Date

20250526

Claims (6)

1. Heat-insulating door (100), An upper door frame (200) that is in close contact with the top of the heat-insulating door (100) and It includes a side door frame (300) that is embedded in the wall and connected to the door (100) by a hinge (1), and The above thermal insulation door (100) comprises a front steel plate (10) of a predetermined height, a rear steel plate (20) coupled to the front steel plate (10) at a predetermined distance, an insulating member (30) filled between the front steel plate and the rear steel plate, and one or more upper thermal insulation frames (40) fixed to the upper edge where the front steel plate (10) and the rear steel plate (10) are coupled. The upper heat shield frame (40) comprises a magnesium rod (41) having a predetermined length (L) and width (W), a front steel member (42) located on the front of the magnesium rod, and a rear steel member (43) located on the rear of the magnesium rod, wherein the rear steel member (43) is positioned lower along the length (L) direction relative to the front steel member, so as to create a height difference (h) between the rear steel member (43) and the front steel member. The upper heat shielding frame (40) has a step (a) formed by the height difference (h), and The above front steel member (42) and rear steel member (43) have a cross-section with a “□” structure (vertical width (W) × height (H)), The upper door frame (200) is characterized by including a first ledge (210) bent to correspond to the step (a) of the heat-insulating frame (40), a second ledge (220) bent to correspond to the upper corner portion of the rear steel plate (20), and a gasket (240) packed in the first ledge (210) and the second ledge (220), respectively.
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3. In claim 1, the heat-insulating door (100) It includes one or more side heat insulation frames (50) fixed to the side where the front steel plate (10) and the rear steel plate (10) are combined, and which are in close contact with the upper heat insulation frame (40). The above-described side heat insulation frame (50) comprises a magnesium rod (51) having a predetermined length (L) and width (W), a front steel member (52) located on the front of the magnesium rod, a rear steel member (53) located on the rear of the magnesium rod, and a screw (44) for fixing them, wherein the rear steel member (53) is located below the front steel member (52) along the width (W) or is located at the same height as the rear steel member (53) and the front steel member (52). The above front steel member (52) and rear steel member (53) are characterized by having a cross-section of a “□” structure (vertical width (W) × height (H)).
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5. A heat-insulating fire door according to claim 1, wherein the heat-insulating door is provided with a step (a) between the upper front side and the upper rear side as the upper heat-insulating frame (40) extending along the horizontal direction is installed on the upper side, and the step (a) is defined by the height (H) of the front steel member (42) or the rear steel member and the height difference (h) between the front steel member (42) and the rear steel member.
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Description

Heat-Insulating Door and Fire-Rated Glazed Door for Exterior Observation Comprising the Same The present invention relates to a heat-insulating door and a heat-insulating glass fire door for external viewing including the same. More specifically, the invention relates to a heat-insulating glass fire door for external viewing that prevents heat from entering between the door and the door frame in the event of a fire by providing a heat-insulating frame and a step between the upper front side and the upper rear side, and delays heat transfer between the front and rear sides of the door leaf while allowing observation of the outside from the inside. Generally, fire doors made of steel plates are installed at the entrances of apartments, homes, and offices to prevent the spread of flames in the event of a fire. Conventional fire doors are primarily used as entrance doors in general residences, apartments, factories, offices, and prefabricated temporary buildings. They are installed in fire compartments organized by floor, area, and use to prevent further spread of fire and minimize damage in the event of a fire, and the doors must be able to suppress fire spread and deformation even under intense internal heat. These fire doors are manufactured by forming the metal front and back plates separately to lighten the weight of the metal fire doors, and inserting insulating material into the space between them, thereby reducing the weight of the fire doors while enhancing thermal insulation, soundproofing, and heat insulation effects. Additionally, fire doors are mainly installed by connecting them to a door frame fixed to the wall with hinges, or by using a pivot (hinge) fixed to the floor surface. Meanwhile, according to Article 6 (Structural Standards for Fire Compartments, etc.) of the Rules on Standards for Evacuation and Fire Protection Structures of Buildings, members used in fire compartments must meet the following requirements: ① fire resistance performance (maintaining structural stability for a specified period), ② flame-retardant performance (flames must not spread to the opposite side), and ③ thermal insulation performance: the temperature on the opposite side must not exceed the standard value for a certain period. For example, a thermal insulation fire door (fire-resistant structure) must have an average door leaf temperature rise of 140°C or less over 35 minutes (fire door on the flame-facing side), a maximum door leaf temperature rise of 180°C or less, and a maximum door frame temperature rise of 360°C or less. Furthermore, fire doors must satisfy fire resistance performance requirements regarding door leaf warping, the state of connection with the door frame, and structural safety during the specified test time. Korean Registered Patent No. 10-2531739 of FIG. 1 discloses a fire door comprising a first and second steel plate and a structural reinforcement frame installed between the first and second steel plates to prevent structural deformation. Although Korean Registered Patent No. 10-2531739 blocks heat transfer by attaching foam expansion tape to a vertical reinforcement frame (70), the upper frame (40), lower frame (50), and side frame (60), which are structural reinforcement frames (30), are all joined by a piece through surface contact between the first steel plate and the second steel plate, resulting in a problem of increased heat transfer between the first steel plate and the second steel plate. In addition, the top of the fire door of Fig. 1 is engaged with a door frame having a step to maintain airtightness, but there is a small gap between the top of the door and the contact surface of the door frame, so it was not easy to block heat to the inside. Korean Registered Patent No. 10-0920530 discloses a fire door and a fire door frame that block heat and smoke caused by a fire from penetrating into the interior through the edges of the fire door by forming irregularities on the edges of the fire door and the edges of the fire door frame and allowing the irregularities to interlock (see Fig. 2). However, Korean Registered Patent No. 10-0920530 forms irregularities on the top plate or back plate forming the fire door, but a problem has been raised that in this case, warping of the door leaf occurs at high temperatures, making it difficult to satisfy the heat insulation conditions. FIG. 1 is an assembly drawing of a fire door disclosed in Korean Registered Patent No. 10-2531739. FIG. 2 is a drawing of a fire door disclosed in Korean Registered Patent No. 10-0920530. FIG. 3 is a front view of a single-sided fire door, which is an embodiment of the present invention. FIG. 4 is a front view of a double fire door, which is another embodiment of the present invention. Figures 5 and 6 are the side view and top view of Figure 4. FIG. 7 illustrates a heat-insulating door (100) and an upper door frame (200). Figure 8 is an exploded view of a thermal insulation door. FIG. 9 is an enlarged view of the he