Fireproof door with hidden hinges

Abstract

The utility model provides a fireproof door with hidden hinges, which comprises a door frame connected with a wall body in a wrapping manner, a first door plate connected with the door frame through a first hidden hinge and a second hidden hinge on the first side of the door frame, and a second door plate connected with the door frame through a second hidden hinge and a third hidden hinge on the second side of the door frame, the second door plate is connected with the door frame through a third hidden hinge and a fourth hidden hinge on the second side of the door frame; the hidden hinge comprises a door plate connecting hinge plate, a hinge shaft and a door frame connecting hinge plate; the door plate connecting hinge plate is provided with a bending angle a and a bending angle b, and the door frame connecting hinge plate is provided with a bending angle c. According to the fireproof door with the hidden hinges, the hinges can be hidden in the door frame, and internal damage caused by the fact that illegal persons break the door by cutting the exposed hinges is avoided. The structure is simple and installation is practical and convenient. And the fireproof door is installed in the middle in the wall body, and the door frame connected with the wall body in a wrapping mode can save the building cost.

Description

Technical Field

[0001] This utility model relates to the field of fire door technology, and in particular to a fire door with a concealed hinge. Background Technology

[0002] Fire doors are often used as doors for water and electricity wells. Traditional fire door hinges are exposed at the connection between the outer door panel and the door frame and protrude from the door panel. Once criminals cut them open, they can easily open the fire door and damage the protective devices inside the door, posing a safety hazard. Utility Model Content

[0003] The purpose of this utility model is to provide a fire door with a concealed hinge. The fire door with a concealed hinge adopts a concealed hinge design, which can hide the hinge inside the door frame, preventing criminals from breaking the door by cutting the exposed hinge and causing internal damage. In addition, the fire door is installed in the middle of the wall, and the door frame that is connected to the wall can save construction costs.

[0004] This utility model provides a fire door with a concealed hinge, comprising:

[0005] A door frame that is integrated with the wall has two concealed hinges installed on each side of its interior. A first door panel is connected to the door frame via a first and a second concealed hinge on the first side of the door frame, and a second door panel is connected to the door frame via a third and a fourth concealed hinge on the second side of the door frame. Each concealed hinge includes a door panel connecting hinge plate, a hinge shaft, and a door frame connecting hinge plate. The door panel connecting hinge plate has a bend angle a and a bend angle b, and the door frame connecting hinge plate has a bend angle c.

[0006] Preferably, the door frame that is connected to the wall is used to hide and protect the concealed hinges.

[0007] Preferably, the door panel connecting hinge is detachably connected to the door panel, and the door frame connecting hinge is detachably connected to the door frame.

[0008] Preferably, a door lock is installed inside the second door panel, and a latch hole is provided on the first door panel corresponding to the door lock position of the second door panel.

[0009] Preferably, a door handle is installed on the outer surface of the second door panel.

[0010] Preferably, the bending angle of the bending angle a is 88 degrees to 90 degrees.

[0011] Preferably, the bending angle of the bending angle b is 88 to 90 degrees.

[0012] Preferably, the bending angle of the c-angle is 88 to 90 degrees.

[0013] The advantages of the fire door with a concealed hinge provided by this utility model compared to the prior art are as follows:

[0014] 1. It can hide the hinges inside the door frame, preventing criminals from breaking into the door by cutting the exposed hinges and causing internal damage.

[0015] 2. Simple structure, practical and convenient installation.

[0016] 3. Fire doors are installed in the middle of the wall, and the door frame that is connected to the wall in a way that covers the wall can save on construction costs. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a front view of a fire door with a concealed hinge according to the present invention.

[0019] Figure 2 This is a top view of a fire door with a concealed hinge according to the present invention.

[0020] Figure 3 This is a schematic diagram of the concealed hinge of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Door frame; 2. First door panel; 3. Second door panel; 4. Door panel connecting hinge; 5. Bend angle a; 6. Bend angle b; 7. Hinge shaft; 8. Door frame connecting hinge; 9. Bend angle c; 10. Wall. Detailed Implementation

[0023] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0025] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0026] Combination Figure 1-3 As shown, the present invention provides a fire door with a concealed hinge, comprising:

[0027] A door frame 1 is connected to the wall 10 in a covered manner. Two hidden hinges are installed on each side of the interior of the door frame. A first door panel 2 is connected to the door frame through a first hidden hinge and a second hidden hinge on the first side of the door frame. A second door panel 3 is connected to the door frame through a third hidden hinge and a fourth hidden hinge on the second side of the door frame. The hidden hinges include a door panel connecting hinge plate 4, a hinge shaft 7, and a door frame connecting hinge plate 8. The door panel connecting hinge plate has a bending angle a 5 and a bending angle b 6, and the door frame connecting hinge plate has a bending angle c 9.

[0028] Specifically, all four concealed hinges are connected to the door panel via the door panel connecting hinge plate, and to the door frame via the door frame connecting hinge plate.

[0029] like Figure 1As shown, two concealed hinges are installed on each side of the inside of the door frame. The first door panel 2 is connected to the door frame through the first and second concealed hinges on the first side of the door frame, and the second door panel 3 is connected to the door frame through the third and fourth concealed hinges on the second side of the door frame. The two concealed hinges on each side are distributed vertically, which can make the door frame bear the weight of the door panel more evenly and avoid the inconvenience of the fire door not being able to close due to deformation of the door frame or hinges.

[0030] Preferably, the door frame 1, which is connected to the wall in a wall-covering manner, is used to hide and protect the concealed hinge.

[0031] It should be noted that fire doors are installed in the middle of the wall, and the door frame that is connected to the wall in a wrapping manner can save on construction costs. For example, it can save on labor costs for the wrapping part, material costs, and may even include design costs.

[0032] Preferably, the door panel connecting hinge 4 is detachably connected to the door panel, and the door frame connecting hinge is detachably connected to the door frame.

[0033] It should be noted that the detachable connection design makes the fire door structure simple and easy to install.

[0034] Preferably, a door lock is installed inside the second door panel, and a latch hole is provided on the first door panel corresponding to the door lock position of the second door panel.

[0035] It should be noted that, as Figure 1 As shown, the door lock is generally installed in the middle of the second door panel at a suitable height for easy unlocking. Corresponding to the position of the door lock on the second door panel, a bolt hole is provided in the corresponding position on the first door panel. When the door lock is closed, the bolt can engage with the bolt hole on the first door panel to complete the locking of the fire door.

[0036] Preferably, a door handle is installed on the outer surface of the second door panel.

[0037] It should be noted that elevator doors or stairwell doors in general public areas may generate noise due to airflow through gaps, friction during opening and closing, or old parts. Noise can also be generated by airflow through gaps between plumbing pipes and walls in plumbing shafts. Figure 2 It is known that the end of the second door panel away from the concealed hinge has a protruding sealing strip design, which can play a role in sealing and noise reduction.

[0038] Furthermore, due to the structural design of the sealing strip and concealed hinges, the fire door can only be opened outwards after being unlocked, so a door handle is only installed on the outside of the second door panel.

[0039] Preferably, the bending angle of the bending angle a is 88 degrees to 90 degrees.

[0040] Preferably, the bending angle of the bending angle b is 88 to 90 degrees.

[0041] Preferably, the bending angle of the c-angle is 88 to 90 degrees.

[0042] It should be noted that the bending angle design of the hinge plate allows the hinge to be hidden inside the door frame without affecting the normal opening and closing of the door panel. Furthermore, the bending angle design of the hinge plate, combined with the combined structural design of the hinge plate 4 connecting the door panel, the hinge shaft 7, and the hinge plate 8 connecting the door frame (the position of the hinge shaft and the opening and closing direction of the two hinge plates), solves the problem that the door panel opening angle is small and affects normal use when using traditional hinge connections for concealed installation. It effectively reduces the limitation of the opening angle between the door panel and the door frame, and the maximum opening angle can reach 150 to 160 degrees, making it convenient for users.

[0043] At the same time, the hinges are hidden inside the door frame, preventing criminals from breaking into the door by cutting the exposed hinges and causing internal damage.

[0044] Preferably, it also includes a first hydraulic rod, the first end of which is installed on the upper frame of the door frame near the second door panel, and the second end is installed on the inner outer surface of the second door panel.

[0045] Preferably, it also includes a second hydraulic rod, the first end of which is installed on the upper frame of the door frame near the first door panel, and the second end is installed on the inner outer surface of the first door panel.

[0046] It should be noted that the function of the hydraulic rod is to slowly close the door panel, avoiding excessive noise and vibration during closing. When only one hydraulic rod is installed, it should be installed on the side of the second door panel first. This is because the second door panel needs to be closed after the first door panel is closed due to the presence of the sealing strip, and there are many situations where only the second door panel needs to be opened to meet the usage requirements. Therefore, the installation priority of the hydraulic rod of the second door panel is higher than that of the first door panel.

[0047] This utility model provides a fire door with concealed hinges, comprising: a door frame that is integrally connected to a wall; two concealed hinges installed on each side of the interior of the door frame; a first door panel connected to the door frame via a first and second concealed hinge on a first side of the door frame; and a second door panel connected to the door frame via a third and a fourth concealed hinge on a second side of the door frame. Each concealed hinge includes a door panel connecting hinge plate, a hinge shaft, and a door frame connecting hinge plate. The door panel connecting hinge plate has a bend angle a and a bend angle b, and the door frame connecting hinge plate has a bend angle c. This fire door with concealed hinges can hide the hinges within the door frame, preventing unauthorized personnel from breaking the door by cutting exposed hinges and causing internal damage. It has a simple structure and is easy to install. Furthermore, the fire door is installed in the middle of the wall, and the door frame integrally connected to the wall saves on construction costs.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A fire door with a concealed hinge, characterized in that, include: A door frame that is integrated with the wall has two concealed hinges installed on each side of its interior. A first door panel is connected to the door frame via a first and a second concealed hinge on the first side of the door frame, and a second door panel is connected to the door frame via a third and a fourth concealed hinge on the second side of the door frame. Each concealed hinge includes a door panel connecting hinge plate, a hinge shaft, and a door frame connecting hinge plate. The door panel connecting hinge plate has a bend angle a and a bend angle b, and the door frame connecting hinge plate has a bend angle c.

2. The fire door with a concealed hinge according to claim 1, characterized in that, The door frame, which is connected to the wall, is used to hide and protect the concealed hinges.

3. The fire door with a concealed hinge according to claim 1, characterized in that, The door panel is detachably connected to the door panel via a hinge plate, and the door frame is detachably connected to the door frame via a hinge plate.

4. The fire door with a concealed hinge according to claim 1, characterized in that, A door lock is installed inside the second door panel, and a latch hole is provided on the first door panel corresponding to the door lock position of the second door panel.

5. The fire door with a concealed hinge according to claim 1, characterized in that, A door handle is installed on the outer surface of the second door panel.

6. The fire door with a concealed hinge according to claim 1, characterized in that, The bending angle of the bending angle a is 88 degrees to 90 degrees.

7. The fire door with a concealed hinge according to claim 1, characterized in that, The bending angle of the bend b is 88 to 90 degrees.

8. The fire door with a concealed hinge according to claim 1, characterized in that, The bending angle of the c-angle is 88 to 90 degrees.

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