KR-20260064815-A - Reinforcement device for Fire door

KR20260064815AKR 20260064815 AKR20260064815 AKR 20260064815AKR-20260064815-A

Abstract

The present invention discloses a new fire door reinforcement device that further enhances product reliability by installing a metal reinforcing frame in the inner space between the bottom of the front plate and the bottom of the rear plate constituting the fire door body in a fire door made of metal to strengthen rigidity, thereby preventing deformation such as warping of the fire door body due to high temperature heat and pressure during a fire, and by improving the airtightness of the bottom of the fire door body that contacts the lower seal of the door frame, thereby preventing smoke and heat from leaking out during a fire. The present invention relates to a fire door reinforcement device for reinforcing a fire door, wherein the fire door body is installed to open and close in a hinged manner by the operation of an auto hinge between door frame frames erected on the left and right side walls of an entrance, and is composed of a front plate and a rear plate made of metal, with insulation material filled in the space between the front plate and the rear plate. The device comprises: a reinforcement frame that is fitted and coupled to the lower end of the hinge shaft of the auto hinge installed to be embedded in the lower inner side of one side between the front plate and the rear plate made of metal constituting the fire door body, and is fixed to the lower inner surface of the front plate and the lower inner surface of the rear plate while being positioned in a transverse direction fitted into the space between the lower end of the front plate and the lower end of the rear plate; and a packing that blocks the flow of internal and external air while in contact with the upper surface of a lower seal on the door frame while being fitted and coupled transversely to the front and rear parts of the lower surface of the reinforcement frame.

Inventors

김병국
이종필

Assignees

김병국
이종필

Dates

Publication Date: 20260508
Application Date: 20241029

Claims (2)

A fire door reinforcement device for reinforcing a fire door, comprising a fire door body (20) that is installed to open and close in a hinged manner by the operation of an auto hinge (12) between door frame (11) installed on the left and right side walls of an entrance provided in a building, and is composed of a front plate (21) and a rear plate (22) made of metal, with an insulating material (23) filled in the space between the front plate (21) and the rear plate (22). A reinforcing frame (30) that is fitted and coupled to the lower end of the hinge shaft (13) of an auto hinge (12) installed to be embedded in the lower inner side of one side between the front plate (21) and the rear plate (22) of the metal material constituting the fire door body (20), and fixed to the lower inner side of the front plate (21) and the lower inner side of the rear plate (22) while being inserted and arranged horizontally in the space between the lower end of the front plate (21) and the lower end of the rear plate (22); A fire door reinforcing device characterized by including a packing (40) that blocks the flow of internal and external air while in contact with the upper surface of the lower seal (11a) on the door frame (11) in a state where it is horizontally fitted and combined with the front and rear parts of the lower surface of the reinforcing frame (30).
In paragraph 1, The above reinforcing frame (30) is formed by molding a metal material with a "∪" shaped cross-section having a length equal to the lateral length of the lower inner side of the fire door body (20), with the upper surface open and the lower surface closed; A vertical fastening surface (31) is formed on the upper part of the front and rear sections, which is fixed by making surface contact with the inner surface of the lower part of the front plate (21) and rear plate (22) on the fire door body (20); The lower part of the above-mentioned fastening surface (31) is bent in two stages horizontally and vertically toward the inside to strengthen rigidity, while; A hinge shaft insertion hole (32) is formed at a position corresponding to the auto hinge (12) installed inside one side of the fire door body (20), into which a hinge shaft (13) protruding outwardly from the lower end of the auto hinge (12) is inserted; A fire door reinforcement device characterized by having a plurality of exhaust holes (33) formed on the bottom surface to allow moisture or heat generated inside the fire door body (20) to be discharged to the outside.

Description

Reinforcement device for fire door The present invention relates to a fire door reinforcement device, and more specifically, to a fire door reinforcement device that can further enhance product reliability by installing a metal reinforcement frame in the inner space between the bottom of the front plate and the bottom of the rear plate constituting the fire door body in a fire door made of metal to strengthen rigidity, thereby preventing deformation such as warping of the fire door body due to high temperature heat and pressure during a fire, while also improving the airtightness of the bottom of the fire door body that contacts the lower seal of the fire door frame to prevent smoke and heat from leaking out during a fire. Generally, metal fire doors are installed at the entrances of apartments, homes, and offices to prevent or block the spread of flames and high temperatures in the event of a fire; these fire doors are mounted to rotate via pivot hinges while positioned between metal door frames installed on the wall. In a conventional structure for installing a fire door at the entrance of a building, a door frame sized to surround the exterior of the fire door body while allowing it to be opened and closed is fixed to the wall forming the entrance of the building, and a hinge is installed between one side of the door frame and the fire door body. In addition, multiple gaskets are installed at the contact points between the door frame and the fire door body to prevent noise, provide thermal insulation, and cushion during opening and closing. Therefore, the gap between the fire door body and the door frame is sealed by the gasket, which has the effect of blocking harmful gases from the fire from entering the room when a fire occurs outside, and also has the effect of preventing noise caused by the fire door body hitting the door frame when closing, and also has the effect of blocking the outside air and the inside air to obtain an indoor thermal insulation effect. Such a fire door body is composed of a front plate and a rear plate formed from metal plates of a certain thickness, wherein the ends of the front plate and the side edges of the rear plate are folded in a bending press and then spot welded. In such fire door bodies, it is common to fill the interior with insulation materials, such as honeycomb made of flame-retardant fiberglass, for thermal insulation, but the exterior is entirely made of metal plates. However, in the structure of such conventional fire doors, no separate reinforcing member is provided in the inner space between the bottom of the front panel and the bottom of the rear panel; since it is constructed simply by bending and spot welding, its supporting strength against pressure caused by high-temperature flames during a fire is very weak. Consequently, there is a serious problem in that when the temperature inside a sealed room rises during a fire, the lower part of the fire door body, which has weak reinforcement, warps or deforms due to the high heat, causing the entire fire door body to be easily damaged. For this reason, safety standards for fire doors stipulate that they must not deform or break even at high temperatures of 2,000°C or higher; however, in the case of joints formed by bending and spot welding of the front and rear panels that constitute the fire door body, this regulation is not practically satisfied. In addition, there is a problem in that conventional fire doors like this do not have a separate sealing member installed at the bottom of the fire door body that contacts the lower seal of the door frame, so toxic smoke or high-temperature heat generated during a fire leaks out, and thus the fire door cannot properly perform its function. To improve upon this aspect, Korean Utility Model Publication No. 20-2011-0002779 (Title: Upper and lower gap sealing device for fire doors, hereinafter referred to as 'related technology') was proposed. The above-mentioned related technology is intended to block the gap between the upper and lower surfaces of a fire door and the frame (door frame), and comprises: an upper and lower reinforcing member of the fire door having a fixing hole formed therein; a blade part integrally fixed to the outer side of the upper and lower reinforcing member of the fire door and manufactured using a thermosetting resin that is flexible and has excellent resilience; a gap sealing device centered on a blade support part having a fixing hole identical to that of the upper and lower reinforcing member; and a pair of plastic male and female screw parts capable of easily connecting the upper and lower reinforcing member and the gap sealing device. However, in the case of the aforementioned related technology, while it may be possible to seal the gap between the upper and lower surfaces of the fire door and the door frame in contact with them, there is a problem in that it cannot perform the function of reinforcing the strength of the fire door body bec