TWM472100U - Air tight structure of fire gate - Google Patents
Air tight structure of fire gate Download PDFInfo
- Publication number
- TWM472100U TWM472100U TW102216155U TW102216155U TWM472100U TW M472100 U TWM472100 U TW M472100U TW 102216155 U TW102216155 U TW 102216155U TW 102216155 U TW102216155 U TW 102216155U TW M472100 U TWM472100 U TW M472100U
- Authority
- TW
- Taiwan
- Prior art keywords
- blades
- metal
- fire
- airtight structure
- top abutting
- Prior art date
Links
Landscapes
- Special Wing (AREA)
Description
本創作在於提供一種氣密結構,特別是指一種防火閘門的氣密結構。The present invention is to provide an airtight structure, and more particularly to a gas tight structure of a fireproof gate.
按,火災的發生,不僅會造成財產方面的重大損失,如有人員的傷亡,更是令人無法彌補的遺憾。目前各公共大樓、旅館飯店或住家大樓等新蓋大樓都是越蓋越高,而且都是密閉式居多,故於各個樓梯口間或電梯口間都設置有防火閘門,以供平時可開啟閘門使大樓內部與外部空氣流通減少悶熱感,進而達到通風的效果,或關閉閘門來防止大火延燒降低火災的損害,進而達到防止大火蔓延的效果。According to the fire, not only will there be a major loss in property, but it will be irreparable if there are casualties. At present, the new building buildings, public hotels, hotel buildings or residential buildings are all over the height of the building, and they are mostly closed. Therefore, fire gates are installed between the stairs or the elevator doors for the usual opening of the gates. The inside of the building and the outside air circulation can reduce the sultry feeling, thereby achieving the effect of ventilation, or closing the gate to prevent the fire from burning and reducing the damage of the fire, thereby achieving the effect of preventing the spread of the fire.
習知的防火閘門包括有一框架及樞設於框架內的數個葉片,該些葉片各以樞軸樞設於框架,該些葉片的上、下二側相互疊合,且於疊合處貼設有氣密條,氣密條大都是以發泡材質或橡膠材質製成,使得該些葉片關閉時,可增加該些葉片之間的氣密性。惟,上述氣密條只能承受約70至80℃的溫度,並無法耐高溫,然而在火災發生的現場,動輒出現數百℃的高溫,該氣密條在遭遇高溫時,隨即發生變形,使得該些葉片之間存有間隙,無法提供預定的氣密效果。The conventional fire damper includes a frame and a plurality of blades pivoted in the frame, the blades are pivotally pivoted to the frame, and the upper and lower sides of the blades are superposed on each other and are attached to the overlap Airtight strips are provided, and the airtight strips are mostly made of foamed material or rubber material, so that when the vanes are closed, the airtightness between the vanes can be increased. However, the above-mentioned airtight strip can only withstand a temperature of about 70 to 80 ° C, and can not withstand high temperatures. However, at the scene where the fire occurs, a high temperature of several hundred ° C occurs, and the airtight strip deforms when subjected to high temperature. There is a gap between the blades to provide a predetermined airtight effect.
值得一提的,防火閘門的該些葉片之間存有間隙,若無法提供氣密效果,使得熱氣流會自該防火閘門的一側面流竄到另一側 面,該防火閘門無法完全阻隔該熱氣流的流竄,且因熱氣流集中聚流的效應下,反而使得尚未發生火災的安全區域,隨時暴露在熱氣流閃燃的危機中。It is worth mentioning that there is a gap between the blades of the fire gate. If the airtight effect is not provided, the hot air flow will flow from one side of the fire gate to the other side. In addition, the fire gate cannot completely block the flow of the hot air flow, and due to the effect of the concentrated flow of the hot air flow, the safe area where the fire has not occurred is exposed to the crisis of flashing of the hot air flow at any time.
綜上所述,本創作人有感上述缺失可改善,乃特潛心研究並配合學理之應用,終於提出一種設計合理且有效改善上述缺失之創作。In summary, the creator feels that the above-mentioned deficiencies can be improved. He has devoted himself to research and cooperates with the application of academics, and finally proposes a design that is reasonable in design and effective in improving the above-mentioned deficiencies.
本創作所要解決的技術問題,在於提供一種防火閘門的氣密結構,能夠承受高溫,在火災發生時可維持該些葉片之間的氣密性,以確保該防火閘門可以完全阻隔熱氣流的流竄。The technical problem to be solved by the present invention is to provide a gas-tight structure of a fire-proof gate capable of withstanding high temperature and maintaining the airtightness between the blades in the event of a fire to ensure that the fire gate can completely block the flow of the heat-insulating airflow. .
為了解決上述的技術問題,本創作提供一種防火閘門的氣密結構,包括:一框架,該框架內部形成一開口;數個葉片,該些葉片樞設於該框架的開口內,該些葉片的上、下兩側各形成有一端部;以及每相鄰的兩葉片的端部之間設有兩金屬彈片,該兩金屬彈片各具有一固定部及連接於該固定部一端的一頂抵部,該兩金屬彈片的固定部分別固定於該兩葉片的端部;該防火閘門關閉時,相鄰接的兩葉片之間的兩金屬彈片的頂抵部頂抵於相對應的端部。In order to solve the above technical problem, the present invention provides a gas-tight structure of a fire shutter, comprising: a frame having an opening formed therein; and a plurality of blades pivoted in the opening of the frame, the blades An upper end portion is formed on each of the upper and lower sides; and two metal elastic pieces are disposed between the ends of each of the two adjacent blades, and the two metal elastic pieces each have a fixing portion and a top abutting portion connected to one end of the fixing portion The fixing portions of the two metal elastic pieces are respectively fixed to the ends of the two blades; when the fire shutter is closed, the top abutting portions of the two metal elastic pieces between the adjacent two blades are abutted against the corresponding ends.
為了解決上述的技術問題,本創作還提供一種防火閘門的氣密結構,包括:一框架,該框架內部形成一開口;數個葉片,該些葉片樞設於該框架的開口內,該些葉片的上、下兩側各形成有一端部;以及每相鄰的兩葉片的端部之間設有一金屬彈片,該金屬彈片具有一固定部及連接於該固定部一端的一頂抵部,該金屬彈片的固定部固定於該兩葉片的端部其中之一;該防火閘門關閉時,相鄰接的兩葉片之間的金屬彈片的頂抵部頂抵於相對應的端部。In order to solve the above technical problem, the present invention also provides a gas-tight structure of a fireproof gate, comprising: a frame having an opening formed therein; and a plurality of blades pivoted in the opening of the frame, the blades One end portion is formed on each of the upper and lower sides; and a metal elastic piece is disposed between the ends of each of the two adjacent blades, the metal elastic piece has a fixing portion and a top abutting portion connected to one end of the fixing portion, The fixing portion of the metal elastic piece is fixed to one of the ends of the two blades; when the fire shutter is closed, the top abutting portion of the metal elastic piece between the adjacent two blades abuts against the corresponding end portion.
為了解決上述的技術問題,本創作還提供一種防火閘門的氣 密結構,包括:一框架,該框架內部形成一開口;數個葉片,該些葉片樞設於該框架的開口內,該些葉片的上、下兩側各形成有一端部;以及每相鄰的兩葉片的端部之間設有兩金屬彈片,該兩金屬彈片各具有一固定部及連接於該固定部一端的一頂抵部,該兩金屬彈片的固定部分別固定於該兩葉片的端部;該防火閘門關閉時,相鄰接的兩葉片之間的兩金屬彈片的頂抵部相互頂抵。In order to solve the above technical problems, the creation also provides a gas of a fire gate. The dense structure comprises: a frame, an opening is formed inside the frame; a plurality of blades pivoted in the opening of the frame, the upper and lower sides of the blades are respectively formed with one end; and each adjacent Two metal elastic pieces are disposed between the ends of the two blades, and the two metal elastic pieces each have a fixing portion and a top abutting portion connected to one end of the fixing portion, and the fixing portions of the two metal elastic pieces are respectively fixed to the two blades. The end portion; when the fire shutter is closed, the top abutting portions of the two metal elastic pieces between the adjacent two blades are abutted against each other.
本創作至少具有下列的優點:This creation has at least the following advantages:
本創作防火閘門的氣密結構,在該些葉片之間設置有金屬彈片,使得該些葉片關閉時,可增加該些葉片之間的氣密性。該些金屬彈片可以耐高溫,在火災發生時可維持該些葉片之間的氣密性,以確保該防火閘門可以完全阻隔熱氣流的流竄,可以避免造成閃燃的情況。The airtight structure of the fire damper of the present invention is provided with metal elastic pieces between the blades, so that when the blades are closed, the airtightness between the blades can be increased. The metal shrapnel can withstand high temperatures and maintain the airtightness between the blades in the event of a fire to ensure that the fire damper can completely block the flow of the insulating airflow and avoid flashing.
為使能更進一步瞭解本創作的特徵及技術內容,請參閱以下有關本創作的詳細說明與附圖,然而所附圖式僅提供參考與說明用,並非用來對本創作加以限制者。In order to further understand the features and technical contents of the present invention, please refer to the following detailed description and drawings of the present invention. However, the drawings are only for reference and description, and are not intended to limit the creation.
1‧‧‧框架1‧‧‧Frame
11‧‧‧開口11‧‧‧ openings
2‧‧‧葉片2‧‧‧ leaves
21‧‧‧樞軸21‧‧‧ pivot
22‧‧‧端部22‧‧‧ End
3‧‧‧金屬彈片3‧‧‧Metal shrapnel
31‧‧‧固定部31‧‧‧ Fixed Department
32‧‧‧頂抵部32‧‧‧Abutment
3a‧‧‧金屬彈片3a‧‧‧Metal shrapnel
31a‧‧‧固定部31a‧‧‧Fixed Department
32a‧‧‧頂抵部32a‧‧‧Abutment
3b‧‧‧金屬彈片3b‧‧‧metal shrapnel
31b‧‧‧固定部31b‧‧‧Fixed Department
32b‧‧‧頂抵部32b‧‧‧Abutment
3c‧‧‧金屬彈片3c‧‧‧metal shrapnel
31c‧‧‧固定部31c‧‧‧ fixed department
32c‧‧‧頂抵部32c‧‧‧Abutment
4‧‧‧氣密層4‧‧‧Inner layer
圖1為本創作防火閘門的氣密結構第一實施例的前視圖。BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a front elevational view of a first embodiment of an airtight structure for creating a fire damper.
圖2為圖1之防火閘門的氣密結構的側視圖。Figure 2 is a side elevational view of the hermetic structure of the fire damper of Figure 1.
圖3為圖1之防火閘門的氣密結構的局部詳圖。Figure 3 is a partial detail view of the hermetic structure of the fire damper of Figure 1.
圖4為本創作防火閘門的氣密結構第二實施例的局部詳圖。Figure 4 is a partial detailed view of a second embodiment of the hermetic structure of the fire gate.
圖5為本創作防火閘門的氣密結構第三實施例的局部詳圖。Figure 5 is a partial detailed view of a third embodiment of the hermetic structure of the fire gate.
圖5A為圖5之A部分詳圖。Figure 5A is a detailed view of a portion A of Figure 5.
圖6為本創作防火閘門的氣密結構第四實施例的局部詳圖。Figure 6 is a partial detailed view of a fourth embodiment of the hermetic structure of the fire gate.
請參閱圖1至圖3,本創作提供一種防火閘門的氣密結構,包 括有一框架1及數個葉片2,該框架1可呈矩形,該框架1內部形成有一開口11,使該防火閘門打開時,可讓氣流通過。Referring to FIG. 1 to FIG. 3, the present invention provides a gas-tight structure of a fire gate, which comprises A frame 1 and a plurality of blades 2 are included. The frame 1 can be rectangular. The frame 1 is internally formed with an opening 11 for allowing airflow to pass when the fire shutter is opened.
該些葉片2樞設於框架1的開口11內,該些葉片2可上、下排列的設置於框架1的開口11內。該些葉片2的兩端分別以樞軸21樞接於框架1相對的兩側,使該些葉片2可於開口11內擺動調整成不同的角度,藉以開啟或關閉防火閘門。通常防火閘門可設有一控制裝置(圖略),該控制裝置可利用手動或自動的方式操作,用於控制該些葉片2的轉動,藉以關閉或打開該防火閘門。由於該控制裝置為習知技術,且本創作並不限制控制裝置的型式及構造,故不加以贅述。The blades 2 are pivotally disposed in the opening 11 of the frame 1, and the blades 2 are disposed in the opening 11 of the frame 1 so as to be arranged up and down. The two ends of the blades 2 are pivotally connected to opposite sides of the frame 1 by pivots 21, so that the blades 2 can be swinged into different angles in the opening 11 to open or close the fire shutter. Typically, the fire damper may be provided with a control device (not shown) that can be operated manually or automatically for controlling the rotation of the blades 2 to close or open the fire damper. Since the control device is a conventional technique, and the present invention does not limit the type and configuration of the control device, it will not be described again.
該些葉片2的上、下兩側各形成有一端部22,端部22可呈彎折狀,可因應需要而彎折成V型或U型等形狀,當防火閘門關閉時,相鄰接的兩葉片2之間可利用端部22相互疊合。One end portion 22 is formed on each of the upper and lower sides of the blade 2, and the end portion 22 can be bent and can be bent into a V-shape or a U-shape according to the need, and when the fire gate is closed, the adjacent connection The ends 22 can be overlapped with each other by the ends 22.
每相鄰的兩葉片2的端部22之間設有至少一金屬彈片3,所述金屬彈片3例如為不銹鋼彈片,在本實施例中每相鄰的兩葉片2的端部22之間設有兩金屬彈片3。所述金屬彈片3呈長條狀,其長度大致與葉片2相同,所述金屬彈片3各具有一固定部31及一頂抵部32,固定部31可以順著端部22的形狀彎折,固定部31可利用焊接(如點焊)、鉚接或螺接等方式固定於葉片2的端部22,使兩金屬彈片3分別固定於兩葉片2的端部22。At least one metal elastic piece 3 is disposed between the end portions 22 of each adjacent two blades 2, and the metal elastic piece 3 is, for example, a stainless steel elastic piece, and is disposed between the end portions 22 of each adjacent two blades 2 in this embodiment. There are two metal shrapnel 3. The metal domes 3 are elongated and have the same length as the blades 2 . The metal domes 3 each have a fixing portion 31 and a top abutting portion 32 . The fixing portion 31 can be bent along the shape of the end portion 22 . The fixing portion 31 can be fixed to the end portion 22 of the blade 2 by welding (such as spot welding), riveting or screwing, so that the two metal domes 3 are respectively fixed to the end portions 22 of the two blades 2.
頂抵部32連接於固定部31的一端,頂抵部32可由固定部31的一端延伸一體成型,頂抵部32形成彈性臂,頂抵部32可彎折呈弧形,但頂抵部32的形狀並不限制,也可以呈直形或其他形狀,只要能用以頂抵於相對應的端部22或金屬彈片3即可。The top abutting portion 32 is connected to one end of the fixing portion 31. The top abutting portion 32 can be integrally formed by extending from one end of the fixing portion 31. The top abutting portion 32 forms an elastic arm, and the top abutting portion 32 can be bent and curved, but the abutting portion 32 The shape is not limited, and may be straight or other shapes as long as it can be used to abut against the corresponding end portion 22 or the metal dome 3.
在本實施例中,每相鄰的兩葉片2的端部22之間設有兩金屬彈片3,因此當防火閘門關閉時,相鄰接的兩葉片2之間利用端部22相互疊合時,位於該兩葉片2之間的兩金屬彈片3的頂抵部32即可頂抵於相對應的端部22,使得相鄰接的兩葉片2之間得以維 持氣密。In the present embodiment, two metal domes 3 are disposed between the end portions 22 of each adjacent two blades 2, so when the fire shutters are closed, when the adjacent two blades 2 are overlapped by the end portions 22, The top abutting portion 32 of the two metal domes 3 located between the two blades 2 can be abutted against the corresponding end portions 22, so that the adjacent two blades 2 can be dimensioned. Keep it tight.
請參閱圖4,在本實施例中每相鄰的兩葉片2的端部22之間只設有一金屬彈片3a。所述金屬彈片3a具有一固定部31a及一頂抵部32a,固定部31a可以順著端部22的形狀彎折,頂抵部32a連接於固定部31a的一端,頂抵部32a可彎折呈弧形。所述金屬彈片3a的固定部31a固定於相鄰的兩葉片2的端部22其中之一。因此當防火閘門關閉時,相鄰接的兩葉片2之間利用端部22相互疊合時,位於該兩葉片2之間的金屬彈片3a的頂抵部32a即可頂抵於相對應的端部22,使得相鄰接的兩葉片2之間得以維持氣密。Referring to FIG. 4, in the present embodiment, only one metal dome 3a is provided between the end portions 22 of each adjacent two blades 2. The metal elastic piece 3a has a fixing portion 31a and a top abutting portion 32a. The fixing portion 31a can be bent along the shape of the end portion 22. The top abutting portion 32a is connected to one end of the fixing portion 31a, and the top abutting portion 32a can be bent. Curved. The fixing portion 31a of the metal dome 3a is fixed to one of the end portions 22 of the adjacent two blades 2. Therefore, when the fire shutter is closed, when the adjacent two blades 2 are overlapped with each other by the end portions 22, the top abutting portion 32a of the metal dome 3a located between the two blades 2 can be abutted against the corresponding end. The portion 22 maintains airtightness between the adjacent two blades 2.
請參閱圖5及圖5A,在本實施例中每相鄰的兩葉片2的端部22之間設有兩金屬彈片3b。所述金屬彈片3b各具有一固定部31b及一頂抵部32b,固定部31b可以順著端部22的形狀彎折,頂抵部32b連接於固定部31b的一端,頂抵部32b可彎折呈V型,固定部31b固定於葉片2的端部22,使金屬彈片3b固定於葉片2的端部22。Referring to FIG. 5 and FIG. 5A, in the present embodiment, two metal domes 3b are disposed between the end portions 22 of each adjacent two blades 2. The metal elastic pieces 3b each have a fixing portion 31b and a top abutting portion 32b. The fixing portion 31b can be bent along the shape of the end portion 22. The top abutting portion 32b is connected to one end of the fixing portion 31b, and the top abutting portion 32b can be bent. The V-shaped portion is folded, and the fixing portion 31b is fixed to the end portion 22 of the blade 2, and the metal dome 3b is fixed to the end portion 22 of the blade 2.
在本實施例中,每相鄰的兩葉片2的端部22之間設有兩金屬彈片3b,因此當防火閘門關閉時,相鄰接的兩葉片2之間利用端部22相互疊合時,位於該兩葉片2之間的兩金屬彈片3b的頂抵部32b即可相互頂抵,兩金屬彈片3b的頂抵部32b也可以頂抵於相對應的端部22,使得相鄰接的兩葉片2之間得以維持氣密。In the present embodiment, two metal domes 3b are provided between the end portions 22 of each adjacent two blades 2, so when the fire shutters are closed, when the adjacent two blades 2 are overlapped by the end portions 22, The top abutting portions 32b of the two metal elastic pieces 3b located between the two blades 2 can abut each other, and the top abutting portions 32b of the two metal elastic pieces 3b can also abut against the corresponding end portions 22, so that adjacent ones are adjacent. The air between the two blades 2 is maintained.
請參閱圖6,在本實施例中金屬彈片3c同樣具有一固定部31c及一頂抵部32c,固定部31c及頂抵部32c的形狀略作不同的變化。本實施例進一步的在金屬彈片3上設置有以陶瓷布或玻纖布製成的氣密層4,藉以增加防火及氣密的效果。所述金屬彈片3也可以為鍍鋅材質。Referring to FIG. 6, in the present embodiment, the metal dome 3c also has a fixing portion 31c and a top abutting portion 32c. The shapes of the fixing portion 31c and the abutting portion 32c are slightly different. In this embodiment, an inner liner 4 made of ceramic cloth or fiberglass cloth is further disposed on the metal dome 3 to increase the effect of fireproofing and airtightness. The metal dome 3 can also be galvanized.
是以,本創作防火閘門的氣密結構,在該些葉片之間設置有金屬彈片,該些金屬彈片可以頂抵於相對應的端部或金屬彈片,使得該些葉片關閉時,可增加該些葉片之間的氣密性。該些金屬彈片可以耐高溫,以不銹鋼彈片為例,即可承受約950℃的高溫,在火災發生時可維持該些葉片之間的氣密性,以確保該防火閘門可以完全阻隔熱氣流的流竄,尤其可以避免造成閃燃的情況。Therefore, the airtight structure of the fire damper of the present invention is provided with metal elastic pieces between the blades, and the metal elastic pieces can be abutted against the corresponding end portions or metal elastic pieces, so that the blades can be increased when the blades are closed. The airtightness between the blades. The metal shrapnel can withstand high temperature. Taking stainless steel shrapnel as an example, it can withstand a high temperature of about 950 ° C, and maintain the airtightness between the blades in the event of a fire to ensure that the fire shutter can completely block the air flow. Rogue, especially to avoid flash fire.
惟以上所述僅為本創作之較佳實施例,非意欲侷限本創作的專利保護範圍,故舉凡運用本創作說明書及圖式內容所為的等效變化,均同理皆包含於本創作的權利保護範圍內,合予陳明。However, the above description is only the preferred embodiment of the present invention, and it is not intended to limit the scope of patent protection of this creation. Therefore, the equivalent changes made by using this creation specification and the contents of the schema are all included in the right of this creation. Within the scope of protection, it is given to Chen Ming.
1‧‧‧框架1‧‧‧Frame
11‧‧‧開口11‧‧‧ openings
2‧‧‧葉片2‧‧‧ leaves
21‧‧‧樞軸21‧‧‧ pivot
22‧‧‧端部22‧‧‧ End
3‧‧‧金屬彈片3‧‧‧Metal shrapnel
Claims (14)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW102216155U TWM472100U (en) | 2013-08-28 | 2013-08-28 | Air tight structure of fire gate |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
TW102216155U TWM472100U (en) | 2013-08-28 | 2013-08-28 | Air tight structure of fire gate |
Publications (1)
Publication Number | Publication Date |
---|---|
TWM472100U true TWM472100U (en) | 2014-02-11 |
Family
ID=50551619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
TW102216155U TWM472100U (en) | 2013-08-28 | 2013-08-28 | Air tight structure of fire gate |
Country Status (1)
Country | Link |
---|---|
TW (1) | TWM472100U (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI677618B (en) * | 2018-05-22 | 2019-11-21 | 陳耀乾 | Leak-proof structure of blade of fire damper |
-
2013
- 2013-08-28 TW TW102216155U patent/TWM472100U/en not_active IP Right Cessation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
TWI677618B (en) * | 2018-05-22 | 2019-11-21 | 陳耀乾 | Leak-proof structure of blade of fire damper |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6624810B2 (en) | Sliding door device | |
CN106884604A (en) | A kind of plastic energy-conservation fireproof window of aluminium and its method of fire protection | |
TWM472100U (en) | Air tight structure of fire gate | |
JP6466649B2 (en) | Sash structure | |
CN203296635U (en) | Fireproof door allowing bi-directional opening | |
JP2013249653A (en) | Curtain wall | |
TWM504861U (en) | Fireproof airtight gate door structure | |
CN106320927A (en) | Fire-resistant structure of broken-bridge-aluminum window | |
JP6140435B2 (en) | sash | |
JP6112844B2 (en) | sash | |
JP6140434B2 (en) | sash | |
CN206246015U (en) | A kind of pair is opened fire resistant doorsets | |
CN103089127A (en) | Bidirectional opened fireproof door | |
JP2022125214A5 (en) | sash window | |
CN209539163U (en) | Aluminium covers glass energy conservation fireproof window | |
CN108868511A (en) | A kind of flame-retarded fire-proof door of bidirectional opening | |
JP6657283B2 (en) | Joinery | |
CN209398270U (en) | A kind of aluminium alloy fire window | |
TWM516635U (en) | Fireproof door structure | |
CN206376693U (en) | A kind of fire resistant doorsets of Initial Stage of Fire Smoke prevention | |
TWM509260U (en) | Blind type fireproof air tight gate structure | |
CN203499502U (en) | Airtight structure of fire damper | |
JP2020101026A (en) | Fixture | |
TW201704619A (en) | Roller blind air gate enabling can perform closing operation without requiring power supply to achieve blocking fire and smoke from channeling | |
KR102593689B1 (en) | Fire-resistant fire door for apartment house |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
MK4K | Expiration of patent term of a granted utility model |