Hidden quadruple fireproof door
By designing a concealed four-section fire door, and adopting folding door panels and automatic closing technology, the problems of large fire doors occupying space and being laborious to operate have been solved, achieving convenient transportation, installation and aesthetic effects, and ensuring rapid evacuation routes.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2026-03-31
AI Technical Summary
Existing fire doors are usually large double doors, which take up a lot of space, are inconvenient to transport and install, are laborious to operate, and have poor aesthetics.
The design incorporates a concealed four-panel fire door with folding door panels. The door panels are folded and stored and automatically closed using components such as a central hanging shaft, automatic folding hinges, and electromagnetic door catches, reducing the weight and space occupied by each door.
It facilitates convenient transportation and installation, reduces labor costs, improves ease of use and aesthetics, and ensures unobstructed evacuation routes during fires.
Smart Images
Figure CN224064230U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of fire door technology, and in particular to a concealed four-section fire door. Background Technology
[0002] Fire doors are doors that can meet the requirements of fire resistance stability, integrity, and thermal insulation for a certain period of time. They are usually installed in fire compartments, evacuation stairwells, vertical shafts, and other areas. They are fire-resistant partitions with a certain degree of fire resistance that can prevent the spread of fire for a certain period of time and ensure the evacuation of personnel.
[0003] In related technologies, fire doors are usually installed using hinges and pivots, and are equipped with door closers and sequencers for door closer control. For large normally open fire doors, they are usually double doors, with the two door leaves attached to the wall by electromagnetic door suction. The door leaves are very wide, occupying a lot of space in the corridor. The weight of a single door leaf is too large, making transportation and installation extremely inconvenient.
[0004] Therefore, we propose a concealed four-panel fire door to solve the above problems. Utility Model Content
[0005] The purpose of this application is to provide a concealed four-panel fireproof door, which reduces the weight of a single door by designing folding door panels. It is very convenient and smooth during transportation, installation and use. The opening and closing operation is simple and convenient, saving time and effort. Moreover, when the folding door panels are fully opened, the folding panels and the main panels are folded and hidden in the wall storage groove, which does not occupy the corridor space, resulting in an aesthetically pleasing and practical effect.
[0006] The above-mentioned technical objective of this application is achieved through the following technical solution: a concealed four-panel fireproof door, comprising a door frame fixed to a wall, an electromagnetic door catcher body fixed to a wall, a support base fixed to the ground, and a concealed four-panel fireproof door body disposed within the door frame. The concealed four-panel fireproof door body includes two concealed four-panel fireproof door main panels and two concealed four-panel fireproof door folding panels. The sides of the two concealed four-panel fireproof door main panels that are far apart from each other are rotatably connected to the inner walls of the two sides of the door frame, and the sides of the two concealed four-panel fireproof door folding panels that are far apart from each other are rotatably connected to the sides of the two concealed four-panel fireproof door main panels that are close to each other.
[0007] A further feature of this application is that a central lower shaft and a central upper shaft are fixedly installed on the inner side wall of the door frame, and the main leaf of the concealed four-panel fire door is rotatably connected to the door frame through the central lower shaft and the central upper shaft.
[0008] A further provision of this application is that the support base is fixedly connected to the bottom end of the central hanging shaft.
[0009] A further feature of this application is that the main leaf of the concealed four-panel fireproof door and the folding leaf of the concealed four-panel fireproof door are connected by an automatic folding hinge body and an automatic folding hinge auxiliary hinge.
[0010] The further configuration of this application is as follows: door handle latches are fixedly installed on the top front side of the main leaf of each of the two concealed four-panel fire doors, and door handles are fixedly installed on the top front side of the folding leaf of each of the two concealed four-panel fire doors, with the two door handle latches respectively adapted to the corresponding door handles.
[0011] A further feature of this application is that pull rings are fixedly installed on the folding panels of both concealed four-panel fireproof doors.
[0012] A further feature of this application is that an electromagnetic door catcher is fixedly installed on the rear side wall of the concealed four-panel fireproof folding door, and the electromagnetic door catcher body is adapted to the electromagnetic door catcher.
[0013] This application includes at least one of the following beneficial technical effects:
[0014] 1. This application sets the concealed four-panel fire door body in a folding manner, splitting the very wide door leaf into a smaller door leaf, so that the process that originally required splicing can be directly formed by processing the raw materials.
[0015] 2. This application reduces the weight of individual doors by designing the concealed four-section fire door body as a detachable and assembleable method, making the entire transportation and loading / unloading process more convenient. Furthermore, the installation can be completed using auxiliary machinery during the entire installation and handling process, greatly reducing labor costs.
[0016] 3. This application utilizes the coordinated use of a central lower shaft, a central upper shaft, a door catch latch, a door catch, an automatic folding hinge body, an automatic folding hinge auxiliary hinge, a pull ring, an electromagnetic door catch body, and an electromagnetic door catch wedge to enable the door to be completely concealed within the wall after opening, with no obstruction caused by the door in the entire passageway, greatly increasing its convenience and aesthetics.
[0017] 4. This application achieves automatic full door closing operation by utilizing the coordinated use of the doorway, central hanging lower shaft, central hanging upper shaft, door handle latch, door handle, automatic folding hinge body, automatic folding hinge auxiliary hinge, pull ring, electromagnetic door catch body, and electromagnetic door catch wedge. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the main view structure of this embodiment.
[0019] Figure 2 This is a top-view cross-sectional structural diagram of the open door state in this embodiment.
[0020] Figure 3 yes Figure 2 A magnified structural diagram of part A in the middle.
[0021] In the diagram, 1. Door frame; 2. Concealed four-panel fireproof door main leaf; 3. Concealed four-panel fireproof door folding leaf; 4. Central hanging lower shaft; 5. Central hanging upper shaft; 61. Door handle latch; 62. Door handle; 71. Automatic folding hinge body; 72. Automatic folding hinge auxiliary hinge; 8. Pull ring; 91. Electromagnetic door catch body; 92. Electromagnetic door catch wedge; 10. Support base. Detailed Implementation
[0022] The technical solution of this application will be clearly and completely described below with reference to specific embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.
[0023] See Figures 1-3 This application provides a concealed four-section fire door, including a door frame 1 fixed to a wall, an electromagnetic door catcher body 91 fixed to a wall, a support base 10 fixed to the ground, and a concealed four-section fire door body disposed within the door frame 1, wherein:
[0024] The concealed four-panel fire door body includes two concealed four-panel fire door main panels 2 and two concealed four-panel fire door folding panels 3. The two concealed four-panel fire door main panels 2, on the side furthest from each other, are rotatably connected to the inner walls of the two sides of the door frame 1, and the two concealed four-panel fire door folding panels 3, on the side furthest from each other, are rotatably connected to the side of the two concealed four-panel fire door main panels 2, on the side closest to each other.
[0025] In this embodiment, a central lower shaft 4 and a central upper shaft 5 are fixedly installed on the inner wall of the door frame 1. The main leaf 2 of the concealed four-panel fireproof door is rotatably connected to the door frame 1 through the central lower shaft 4 and the central upper shaft 5. The support base 10 is fixedly connected to the bottom end of the central lower shaft 4. This connection method ensures the stability of the concealed four-panel fireproof door body during rotation, reduces the risk of shaking and displacement of the concealed four-panel fireproof door body, and extends the service life of the concealed four-panel fireproof door body. The main leaf 2 of the concealed four-panel fireproof door and the folding leaf 3 of the concealed four-panel fireproof door are rotatably connected through an automatic folding hinge body 71 and an automatic folding hinge auxiliary hinge 72. With this design, when opening and closing the door, the folding leaf 3 of the concealed four-panel fireproof door can automatically follow the movement of the main leaf 2 of the concealed four-panel fireproof door, making operation easy and labor-saving, improving personnel passage efficiency, and quickly opening the passage during emergency evacuation.
[0026] In this embodiment, door handles 61 are fixedly installed on the top front side of the main leaf 2 of the two concealed four-panel fireproof doors, and door handles 62 are fixedly installed on the top front side of the folding leaf 3 of the two concealed four-panel fireproof doors. The two door handles 61 are respectively matched with the corresponding door handles 62. When the folding leaf 3 of the concealed four-panel fireproof door and the main leaf 2 of the concealed four-panel fireproof door are folded, the stability of the folding leaf 3 of the concealed four-panel fireproof door and the main leaf 2 of the concealed four-panel fireproof door can be ensured by the interlocking action of the door handles 61 and the door handles 62.
[0027] In this embodiment, pull rings 8 are fixedly installed on both concealed four-panel fireproof door folding panels 3. The concealed four-panel fireproof door body, composed of two concealed four-panel fireproof door main panels 2 and two concealed four-panel fireproof door folding panels 3, can be folded by pulling the pull rings 8. Then, the folded door panels can be pushed to open. It should be noted that after the two concealed four-panel fireproof door folding panels 3 are closed, they can be locked with fireproof locks. Therefore, when blocking flames, the two concealed four-panel fireproof door folding panels 3 will not open on their own, ensuring the airtightness between the two concealed four-panel fireproof door folding panels 3.
[0028] In this embodiment, an electromagnetic door catcher 92 is fixedly installed on the rear wall of the concealed four-panel fireproof door folding panel 3. The electromagnetic door catcher body 91 is compatible with the electromagnetic door catcher 92. It should be noted that a storage slot is provided on the wall for storing the folded and fastened concealed four-panel fireproof door folding panel 3 and concealed four-panel fireproof door main panel 2. The electromagnetic door catcher body 91 is installed and fixed on the inner wall of the storage slot. When the concealed four-panel fireproof door folding panel 3 and concealed four-panel fireproof door main panel 2 are folded and fastened, they are pushed into the storage slot on the wall, and the electromagnetic door catcher 92 is activated. The iron 92 is magnetically attracted to the electromagnetic door catcher body 91, which ensures the stability of the folding fan 3 and the main fan 2 of the concealed four-panel fireproof door after folding and fastening, preventing them from moving out of the storage slot on the wall. As a result, when the door is open, the space occupied by the folding fan 3 and the main fan 2 of the concealed four-panel fireproof door can be reduced. It should be noted that the wiring method and operating principle of the electromagnetic door catcher body 91 are mature technologies in this field and will not be elaborated further in this article.
[0029] In this embodiment, it should be further explained that, Figure 1 This is the closed state of the concealed four-section fire door. Figure 2 This is the open state of the concealed four-section fire door.
[0030] Based on the above structure, the operating principle of the concealed four-section fire door provided in this application is as follows:
[0031] In daily life, the concealed four-panel fire door is usually in the open state (e.g.) Figure 2 and Figure 3 (as shown in the image);
[0032] When a fire occurs and a fire alarm signal is received, the electromagnetic door catcher body 91 is de-energized, and the magnetic force disappears. This quickly releases the magnetic attraction and fixation of the electromagnetic door catcher wedge 92. At this time, the concealed four-panel fireproof door folding leaf 3 and the concealed four-panel fireproof door main leaf 2 begin to close under the closing force of the central lower shaft 4 and the central upper shaft 5. When the concealed four-panel fireproof door main leaf 2 touches the door frame 1, the door handle 62 and the door handle latch 61 separate. The concealed four-panel fireproof door folding leaf 3 continues to close under the action of the automatic folding hinge body 71 and the automatic folding hinge auxiliary hinge 72, ultimately achieving complete closure (e.g., Figure 1 (as shown in the image), this process requires no human intervention;
[0033] When the door needs to be opened, the operator pulls the concealed four-panel fireproof door folding panel 3 through the pull ring 8, folding it together with the concealed four-panel fireproof door main panel 2 until the door handle 62 and door handle buckle 61 are engaged. This secures the concealed four-panel fireproof door folding panel 3 and the concealed four-panel fireproof door main panel 2. Then, the folded door panel is pushed into the storage slot on the wall. At this time, the electromagnetic door catcher body 91 is energized to generate magnetic force. The electromagnetic door catcher wedge 92 is magnetically attracted and fixed to the electromagnetic door catcher body 91, thus fixing the folded door panel in the storage slot. The door panel is then in the normally open state.
Claims
1. A concealed four-way fire door, characterized in that, The utility model relates to a hidden four-leaf fireproof door body, which comprises a door frame (1) fixed on a wall, an electromagnetic door suction body (91) fixed on the wall, a supporting seat (10) fixed on the ground and a hidden four-leaf fireproof door body arranged in the door frame (1), wherein the hidden four-leaf fireproof door body comprises two hidden four-leaf fireproof door main leaves (2) and two hidden four-leaf fireproof door folding leaves (3), the two hidden four-leaf fireproof door main leaves (2) are rotatably connected to the inner walls of the door frame (1) on the sides away from each other, and the two hidden four-leaf fireproof door folding leaves (3) are rotatably connected to the sides of the two hidden four-leaf fireproof door main leaves (2) on the sides close to each other.
2. The concealed quadruple fire door according to claim 1, wherein: The inner wall of the door frame (1) is fixedly provided with a central downward hanging shaft (4) and a central upward hanging shaft (5), and the hidden four-leaf fireproof door main leaves (2) are rotatably connected to the door frame (1) through the central downward hanging shaft (4) and the central upward hanging shaft (5).
3. The concealed quadruple fire door according to claim 2, wherein: The supporting seat (10) is fixedly connected to the bottom end of the central downward hanging shaft (4).
4. The concealed quadruple fire door of claim 1, wherein: The hidden four-leaf fireproof door main leaves (2) and the hidden four-leaf fireproof door folding leaves (3) are rotatably connected through automatic folding hinge bodies (71) and automatic folding hinge auxiliary hinges (72).
5. The concealed quadruple fire door according to claim 1, wherein: The front top of each of the two hidden four-leaf fireproof door main leaves (2) is fixedly provided with a door handle buckle (61), the front top of each of the two hidden four-leaf fireproof door folding leaves (3) is fixedly provided with a door handle (62), and the two door handle buckles (61) are matched with the corresponding door handles (62).
6. The concealed quadruple fire door of claim 1, wherein: The two hidden four-leaf fireproof door folding leaves (3) are fixedly provided with pull rings (8).
7. The concealed quadruple fire door of claim 1, wherein: The rear wall of the hidden four-leaf fireproof door folding leaves (3) is fixedly provided with an electromagnetic door suction inclined iron (92), and the electromagnetic door suction body (91) is matched with the electromagnetic door suction inclined iron (92).