Lightweight peripheral frame structure for a metal fire door

Abstract

The present invention relates to a lightweight peripheral frame structure for a metal fire door, comprising two door panels, a frame, and a fire-resistant material. The central part of each door panel features a parallel panel section, with side panel sections vertically bent outward. These two side panel sections are spaced apart, forming an accommodating space between the panel sections and the side panel sections. The frame is made of metal and has a hollow central portion, an outer surface, and an inner surface. The two corresponding outer surfaces are perpendicular to the exterior, with a spacing that matches the width of the accommodating space. The frame is positioned on the side of the accommodating space, with its outer surfaces respectively in close contact with the inner sides of the panel sections of the two door panels. The outer surface of the frame is also in close contact with the inner sides of the side panel sections, ensuring that the frame's outer surface is securely fixed to the side panel sections. Additionally, the fire-resistant material is placed within the accommodating space. Through this design, the invention achieves a lightweight structure that is easy to assemble.

Description

[Technical Field]

[0001] This invention relates to a lightweight peripheral frame structure for a metal fire door, mainly referring to a lightweight frame structure disposed around the periphery of a fire door. [Previous Technology]

[0002] To improve building safety, fire doors are often installed in public places and various passages for people to enter and exit, which can prevent the heat energy of the fire source on one side of the fire door from being transferred to the other side of the fire door, causing the other side of the fire door to overheat and become dangerous.

[0003] Conventional metal fire doors mainly consist of two door panels, a fire door, and a frame assembly. The frame is located around the two door panels to form a fire door that can support the two door panels. Figure 4 shows a cross-sectional view of the perimeter structure of a current fire door, which consists of two door panels 1', a frame 2', several fireproof boards 3', a fireproof material 4', and a smoke shield 5'.

[0004] The door panel 1' is a flat sheet made of metal, arranged opposite each other. It has a centrally parallel panel portion 11' and side panels 12' that are vertically bent on the outside. The two side panels 12' are spaced apart by a gap 121', and there is an accommodating space 13' between the two panel portions 11' and the two side panels 12'. The frame 2' is a square tube made of metal, with a central hollow portion 21'. Its width W1 is smaller than the width W2 of the accommodating space 13', and it is located on the side of the two door panels 1'. There is a gap 22' between the frame 2' and the panel portions 11' and side panels 12' of the two door panels 1'. The fireproof board 3' is a non-metallic board with better heat insulation properties and is located at the gap 22'.

[0005] Assembly holes 122', 31', and 23' are respectively provided on the side panel 12', the fireproof board 3', and the frame 2', and are assembled and fixed by bolts 6' through the assembly holes 122', 31', and 23'. The fireproof material 4' is fireproof cotton or other non-metallic fireproof material, and is provided at the accommodating space 13' of the two door panels 1'. The smoke shield 5' is provided on the outside of the two side panels 12' to provide a smoke shielding function.

[0006] Please refer to Figure 5. When one side of the fire door is heated, its heat energy can enter the receiving space 13' through the panel 11' on one side, and the heat source is prevented from being conducted by the fireproof material 4' and the fireproof board 3'. However, when the heat source enters the hollow part 21' of the frame 2' from the fireproof board 3' at the position of the corresponding heated panel 11', the frame 2' is provided with fireproof boards 3' between the other side panel 11' and the side panel 12', causing the heat energy in the hollow part 21' to be trapped and accumulated, making it difficult to dissipate from the fireproof board 3' to the opposite side panel 11'. The heat energy quickly enters the center of the receiving space 13' of the two door panels 1', causing the center of the fire door to be simultaneously subjected to heat energy from the heated panel 11' and the hollow part 21' of the frame 2' towards the center, which will lead to an excessively high temperature in the center of the panel 11' on the other side, which is not heated.

[0007] However, the center of the panel 11' is a location that is easily accessible to people and is the main fire door temperature measuring point for fire door testing. Therefore, it is currently necessary to significantly increase the density of the fireproof material 4' to reduce the temperature of the panel 11' on the other side, which is not subject to heat. However, this would result in a significant increase in weight, difficulty in installation and construction, and increased costs.

[0008] In addition, when assembling the frame 2', the side plate 12' of the frame 2', fireproof board 3', and door panel 1' must first be respectively provided with assembly holes 122', 31', and 23', and then assembled by bolts 6'. The assembly is inconvenient, and the bolt 6' locking method is prone to loosening or falling off due to the opening and closing of the fire door. [Summary of the Invention]

[0009] The purpose of this invention is to provide a lightweight, easy-to-install, and heat-insulating fire door perimeter frame structure.

[0010] The fire door of the present invention includes two door panels, a frame, and a fireproof material. The two door panels are flat sheets made of metal, each with a centrally parallel panel portion and side panels that are bent vertically on the outer side. The two side panels are spaced apart, and there is an accommodating space between the two panel portions and the two side panels. The frame is also made of metal, with a central hollow portion, an outer side, an inner side, and two outer surfaces perpendicular to the outer side. The distance between the two outer surfaces corresponds to the width of the accommodating space. The frame is located to the side of the accommodating space, and the two outer surfaces are respectively attached to the inner side of the panel portion of the two door panels. The outer side is attached to the inner side of the side panel portion, and the outer side of the frame is fixedly connected to the side panel portion. The fireproof material is located in the accommodating space.

[0011] In one embodiment of the present invention, the outer side of the frame is fixed to the side plate of the door panel by spot welding.

[0012] In one embodiment of the present invention, the skeleton is a square tube.

[0013] In one embodiment of the present invention, one side of the fireproof material is attached to the inner side of the frame.

[0014] In one embodiment of the present invention, the fireproof material is fireproof cotton.

[0015] In one embodiment of the present invention, the fireproof material is a fireproof board.

[0016] In one embodiment of the present invention, a smoke shield is further included, which is disposed on the outer side of the side panel of the door panel.

[0017] When one side of the fire door is heated, the heat source can be transferred from the door panel to the fire-resistant material and frame. The metal frame has a high thermal conductivity coefficient, and in conjunction with the principle of heat diffusion, the heat energy within the hollow portion of the frame can be rapidly diffused and transferred to the other side's outer surface, radiating outwards to the unheated panel. Therefore, this invention can use materials with lower density and lighter weight than conventional fire-resistant materials to meet fire resistance testing standards, providing good thermal insulation, improved installation convenience, and reduced costs.

[0018] The present invention can use spot welding to quickly combine the two door panels and the frame, making assembly convenient and providing better stability after combination. Unlike conventional fire door bolts, there will be no loosening or falling off, which can improve the combined strength and reliability of the fire door.

Implementation Method

[0019] Please refer to Figures 1 and 2. The fire door of the present invention includes two door panels 1, a frame 2, a fireproof material 3, and a smoke shield 4. The two door panels 1 are flat sheets made of metal, with a parallel panel portion 11 in the center and side panel portions 12 that are bent vertically on the outside. The two side panel portions 12 are spaced apart by a gap 121, and there is an accommodating space 13 between the two panel portions 11 and the two side panel portions 12.

[0020] The frame 2 is a square tube made of metal, with a hollow part 21 in the center, an outer side 22, an inner side 23, and two outer surfaces 24 perpendicular to the outer side 22. The distance between the two outer surfaces 24 is the width W3 corresponding to the accommodating space 13. The frame 2 is located on the side of the accommodating space 13, and the two outer surfaces 24 are respectively attached to the inner side of the panel portion 11 of the two door panels 1. The outer side 22 is attached to the inner side of the side panel portion 12. The outer side 22 of the frame 2 and the side panel portion 12 are both made of metal and are fixed by spot welding 25. In other embodiments, they can also be fixed by locking or other suitable methods (not shown).

[0021] The fireproof material 3 can be fireproof cotton, fireproof board or other fireproof material, and is located in the accommodating space 13, with one side abutting against the inner side 23 of the frame 2.

[0022] The smoke shield 4 is located on the outer side of the side panel 12 of the door panel 1.

[0023] Please refer to Figure 3. When one side of the fire door is heated, the heat source can be transferred from the door panel 11 of the corresponding heated door panel 1 to the fireproof material 3 and the frame 2. The metal frame 2 has a high thermal conductivity coefficient, and in conjunction with the heat diffusion principle, the heat energy entering from the outer surface of the corresponding heated side can be quickly transferred from both sides to the outer surface 24 of the other side, and dissipated outward from the panel 11 of the other non-heated door panel 1.

[0024] The heat energy transferred to the hollow portion 21 in this invention can be rapidly diffused and transferred to the other outer surface 24, dissipating outwards to the unheated panel portion 11. Therefore, the heat energy in the hollow portion 21 of the frame 2 will not be significantly transferred to the fireproof material 3 with low thermal conductivity in the center of the two door panels 1, ensuring that the temperature at the test point of the unheated panel portion 11, which is easily accessible in the center of the fire door, will not rise significantly. Therefore, this invention can use materials with lower density and lighter weight than conventional fireproof materials to meet fire resistance testing standards, has good thermal insulation properties, and can greatly improve the convenience of installation for construction personnel and reduce costs.

[0025] In addition, the present invention can use spot welding 25 to quickly combine the two door panels 1 and the frame 2, which is convenient to assemble and has better stability after combination. It will not have the situation of loosening and falling off as with conventional fire door bolts, which can improve the combination strength and reliability of fire door.

[0026] Therefore, as described above, the present invention is an innovative design for fire doors that breaks through the traditional concept of heat diffusion principle. It can be lightweight, has better assembly convenience, reliability and meets the fire door testing standards. The foregoing embodiments are examples of the present invention and are not limitations of the present invention. All equivalent changes made in accordance with the spirit of the present invention should also fall within the scope of the present invention. [Simplified Explanation of the Diagram]

[0027] Figure 1 is a cross-sectional view of the perimeter structure of the fire door of the present invention, corresponding to position AA in Figure 2.

[0028] Figure 2 is a front view schematic diagram of the fire door of the present invention.

[0029] Figure 3 is a schematic diagram of the fire door of the present invention being heated.

[0030] Figure 4 is a cross-sectional view of the surrounding structure of a conventional fire door.

[0031] Figure 5 is a schematic diagram of the heat treatment of a conventional fire door.

Claims

1. A lightweight peripheral frame structure for a metal fire door, comprising: The two door panels are flat sheets made of metal, with a centrally parallel panel section and side panels that are bent vertically on the outer sides. The two side panels are spaced apart, and there is an accommodating space between the two panel sections and the two side panels. A frame is made of metal, with a central hollow section, an outer side, and an inner side. Two outer surfaces are perpendicular to the outer side. The distance between the two outer surfaces corresponds to the width of the accommodating space. The frame is located to the side of the accommodating space. The two outer surfaces are respectively attached to the inner side of the panel section of the two door panels. The outer side is attached to the inner side of the side panel section, and the outer side of the frame is fixed to the side panel section. A fireproof material is located in the accommodating space. It also includes a smoke shield strip located on the outer side of the side panel section of the door panel.

2. The lightweight peripheral frame structure of the metal fire door as described in claim 1, wherein the outer side of the frame is fixed to the side panel of the door panel by spot welding.

3. The lightweight peripheral frame structure of the metal fire door as described in claim 1, wherein the frame is a square tube.

4. The lightweight peripheral frame structure of the metal fire door as described in claim 1, wherein one side of the fireproof material is attached to the inner side of the frame.

5. The lightweight peripheral frame structure of the metal fire door as described in claim 1, wherein the fireproof material is fireproof cotton.

6. The lightweight peripheral frame structure of the metal fire door as described in claim 1, wherein the fireproof material is a fireproof board.

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