A new main and auxiliary door frame structure and a new armored door

Abstract

This invention discloses a novel main and secondary door frame structure and a novel armored door, aiming to solve the problems of limited disassembly and assembly and easy damage to walls caused by existing integrated door frames. The key technical points are: It includes: a main door frame comprising an inner frame, a first side plate, a first limiting plate, and a first edging; the inner frame has a first mounting hole; a first secondary frame comprising an outer frame and a second side plate; the outer frame has several positioning modules and second mounting holes; the positioning modules have first threaded holes; the second side plate has several second threaded holes; a second secondary frame comprising a third side plate, a second edging, and a third edging; the third side plate has several third mounting holes; the first limiting plate is fitted to the inner side of the second side plate; the first edging is engaged with the outer frame; the second edging is engaged with the inner frame; and the third edging is engaged with the outer frame. This invention, through a split-modular design, retains the stability of traditional anchor-filled installation while solving the pain point of difficult maintenance and replacement of integrated structures.

Description

Technical Field

[0001] This invention relates to a door frame structure, and more specifically, to a novel main and secondary door frame structure and a novel armored door. Background Technology

[0002] Currently, most existing door frames adopt a one-piece integrated structure. The standard installation process mainly includes pre-assembly of the door frame on the ground, temporary adjustment of wooden wedges after the door frame is inserted into the opening, mechanical anchoring to the wall, filling the gaps between the frame and wall, finishing decoration, removal of temporary fixing structures, and installation and debugging of the door leaf. This one-piece door frame forms a fixed connection with the wall through anchoring structures and foam filling layers, resulting in good installation stability and making it widely used in various building door and window installation scenarios.

[0003] However, existing integrated door frame structures have significant technical flaws, particularly in later maintenance and replacement operations. When the door frame needs replacement due to deformation, damage, or aging, partial disassembly is not possible; only a complete, forceful removal method can be used. This method not only significantly increases labor and material costs, raising repair and replacement expenses, but also easily pulls and compresses the doorway wall, causing hidden damage such as wall cracks and loosening of the base layer, compromising the original installation structure of the doorway, and reducing the stability and safety of secondary installation of the door frame. Based on the shortcomings of existing technology, there is an urgent need to develop a split door frame structure to solve the technical problems of limited disassembly and assembly and easy damage to the wall caused by existing integrated door frames. Summary of the Invention

[0004] This invention provides a novel main and secondary door frame structure and a novel armored door; solving the problems of limited disassembly and assembly of existing integrated door frames and easy damage to the wall.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a novel main and secondary door frame structure, comprising: The main door frame includes an inner frame, a first side plate bent and connected to one side of the inner frame, a first limiting plate bent and connected to the other side of the inner frame, and a first edge banding bent and connected to the first side plate. The inner frame is provided with a plurality of first mounting holes spaced apart along its length. The first sub-frame includes a second side plate that is bent and connected to one side of the outer frame. The outer frame is provided with a plurality of positioning modules and second mounting holes that are spaced apart along its length. The positioning modules are provided with first threaded holes. The second side plate is provided with a plurality of second threaded holes that are spaced apart along its length. The second sub-frame includes a third side plate and a second and a third edging bend that are provided on both sides of the third side plate. The third side plate is provided with a plurality of third mounting holes that are spaced apart along its length. The first limiting plate is attached to the inner side of the second side plate, the first edging is engaged with the outer frame, and a screw is connected between the first threaded hole and the first mounting hole to fix the inner frame to the positioning module; the second edging is engaged with the inner frame, the third edging is engaged with the outer frame, and a screw is also connected between the third mounting hole and the second threaded hole to fix the third side plate to the second side plate.

[0006] In this invention, the first sub-frame can be fixed inside the door opening by combining expansion screws and a potting process, while the main door frame and the second sub-frame are fixed to the first sub-frame by combining screws. Therefore, the main door frame and the second sub-frame can be removed separately without removing the first sub-frame, thereby avoiding the problems of limited disassembly and assembly and easy damage to the wall of existing integrated door frames.

[0007] Furthermore, the positioning module includes a first height limiting plate, a second height limiting plate, and an adjusting plate. The two height limiting plates are fixed relative to the outer frame and set at the same height. The first height limiting plate is provided with a first sliding groove, and the second height limiting plate is provided with a second sliding groove. The adjusting plate is slidably disposed in the two sliding grooves, and the first threaded hole is disposed on the adjusting plate.

[0008] Furthermore, the first mounting hole is elongated and its length direction is parallel to the length direction of the inner frame.

[0009] Furthermore, the third side plate is provided with a first slot distributed along its length direction, the third mounting hole is provided in the first slot, and the other side of the first slot is attached to the second side plate.

[0010] Furthermore, the inner frame is also provided with a stop and a second slot distributed along its length direction. The second slot is provided with a first sealing strip. The first mounting hole is located in the second slot. The other side of the second slot is fitted with the positioning module.

[0011] Furthermore, the second edge extends to protrude from the stop and form a third groove, wherein a second sealing strip is provided in the third groove.

[0012] The present invention also provides a novel armored door, comprising a door frame and a door leaf, wherein the door frame is the aforementioned novel main and secondary door frame structure. Since the aforementioned novel main and secondary door frame structure has the above-mentioned technical effects, the novel armored door having this novel main and secondary door frame structure also has the same technical effects.

[0013] Furthermore, the door leaf sequentially includes an outer trim panel, a steel core panel, an interior trim panel, and a retaining edge. The retaining edge constrains the outer trim panel, the steel core panel, and the interior trim panel into a tightly fitted state. The retaining edge is provided with a first stepped surface corresponding to the stop and a second stepped surface corresponding to the first sidewall. A third sealing strip is provided on the second stepped surface.

[0014] In summary, the present invention has the following beneficial effects: Through its split modular design, the present invention retains the stability of traditional anchor-filled installation while solving the pain point of difficult maintenance and replacement of integrated structures, making it suitable for widespread application in various types of entrance doors and armored doors. Attached Figure Description

[0015] Figure 1 This is a partial cross-sectional view of the present invention; Figure 2 for Figure 1 Enlarged view of part A; Figure 3 This is the front view of the first sub-frame; Figure 4 This is a schematic diagram of the adjustment plate. Figure 5 This is a structural diagram of the positioning module; Figure 6 The front view of the longitudinal frame of the main door frame; Figure 7 This is a diagram showing the state when the first sub-frame is fixed to the wall; Figure 8 A diagram showing the state when the main door frame, the first sub-frame, and the wall are fixed together; Figure 9 A diagram showing the state of the main door frame, the first sub-frame, the second sub-frame, and the wall when they are fixed together. Figure 10 for Figure 9 A diagram showing the state after installing the first and second sealing strips; Figure 11 for Figure 10 A diagram showing the state of the wooden adjustable door frame after installation; Figure 12 This is a partial structural diagram of the new armored door when it is closed; Figure 13 for Figure 12 Enlarged view of part B; Figure 14 This is a front view of the new armored door when it is closed.

[0016] Explanation of reference numerals in the attached figures: 10. First sealing strip; 11. Angled sealing flap; 20. Second sealing strip; 21. First protrusion; 22. Second protrusion; 23. Arc-shaped protrusion; 24. Fourth slot; 30. Third sealing strip; 100. Main door frame; 110. Inner frame; 120. First side plate; 130. First limiting plate; 140. First edging; 150. First mounting hole; 160. Stop; 170. Second slot; 180. Third slot; 200. First sub-frame; 210. Outer frame; 220. Second side plate; 230. Second limiting plate; 240. Positioning module; 241. First 242. Height restriction plate; 243. Second height restriction plate; 244. Adjustment plate; 245. First sliding groove; 246. Second sliding groove; 247. Bending part; 250. Second mounting hole; 260. First threaded hole; 270. Second threaded hole; 300. Second sub-frame; 310. Third side plate; 320. Second edging; 330. Third edging; 340. Third mounting hole; 350. First slot; 400. Door leaf; 410. Exterior trim panel; 420. Steel plate door core; 430. Interior trim panel; 440. Slotted edge; 441. First step surface; 442. Second step surface; 500. Door frame. Detailed Implementation

[0017] To enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0018] In the description of this invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top / bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0019] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0020] The present invention will now be described in detail with reference to the accompanying drawings.

[0021] Example: See Figure 1 and Figure 3 A novel main and secondary door frame structure, comprising: The main door frame 100 includes an inner frame 110, a first side plate 120 bent and connected to one side of the inner frame 110, a first limiting plate 130 bent and connected to the other side of the inner frame 110, and a first edge banding 140 bent and connected to the first side plate 120. The inner frame 110 is provided with a plurality of first mounting holes 150 spaced apart along its length direction. The inner frame 110, the first side plate 120, and the first limiting plate 130 are integrally bent and formed. The first sub-frame 200 includes an outer frame 210 and a second side plate 220 bent and connected to one side of the outer frame 210. A second limiting plate 230 is also bent and connected to the other side of the outer frame 210. The outer frame 210 is provided with a plurality of positioning modules 240 and second mounting holes 250 spaced apart along its length. The positioning modules 240 are provided with first threaded holes 260. The second side plate 220 is provided with a plurality of second threaded holes 270 spaced apart along its length. The outer frame 210, the second side plate 220 and the second limiting plate 230 are integrally bent from steel plates. The second sub-frame 300 includes a third side plate 310 and a second edge 320 and a third edge 330 bent on both sides of the third side plate 310. The third side plate 310 is provided with a plurality of third mounting holes 340 spaced apart along its length direction. The third side plate 310, the second edge 320 and the third edge 330 are integrally bent into shape. The first limiting plate 130 is attached to the inner side of the second side plate 220, the first edging 140 is engaged with the outer frame 210, and a screw is connected between the first threaded hole 260 and the first mounting hole 150 to fix the inner frame 110 and the positioning module 240; the second edging 320 is engaged with the inner frame 110, the third edging 330 is engaged with the outer frame 210, and a screw is also connected between the third mounting hole 340 and the second threaded hole 270 to fix the third side plate 310 and the second side plate 220.

[0022] For details, see Figure 5 The positioning module 240 includes a first height limiting plate 241, a second height limiting plate 242, and an adjusting plate 243. The two height limiting plates are fixed relative to the outer frame 210 and are set at the same height. The first height limiting plate 241 is provided with a first sliding groove 244, and the second height limiting plate 242 is provided with a second sliding groove 245. The adjusting plate 243 is slidably disposed in the two sliding grooves, and a first threaded hole 260 is provided on the adjusting plate 243.

[0023] For details, see Figure 4 The adjustment plate 243 located on the left and right vertical frames of the first sub-frame 200 is vertically set. In order to prevent it from falling off the two slides, a bending part 246 is provided on one side of the adjustment plate 243 to restrict it from unidirectionally falling off the two slides.

[0024] For details, see Figure 6 The first mounting hole 150 is elongated and its length direction is parallel to the length direction of the inner frame 110.

[0025] Specifically, in order to accommodate the installation of a wooden adjustable door frame, the third side plate 310 is provided with a first slot 350 distributed along its length direction, and a third mounting hole 340 is provided in the first slot 350. The other side of the first slot 350 is fitted with the second side plate 220. The first slot 350 is used to install and position the wooden adjustable door frame.

[0026] For details, see Figure 2 The inner frame 110 is also provided with a stop 160 and a second slot 170 distributed along its length. The second slot 170 is provided with a first sealing strip 10 and a first mounting hole 150 located in the second slot 170. The other side of the second slot 170 is in contact with the positioning module 240.

[0027] For details, see Figure 2 The second edge 320 extends to protrude from the stop 160 and form a third groove 180, and a second sealing strip 20 is provided in the third groove 180.

[0028] For details, see Figure 2 The first sealing strip 10 has three oblique sealing flaps 11 facing outwards towards the stop 160; the second sealing strip 20 has a first protrusion 21, a second protrusion 22, and an arc-shaped protrusion 23 on its outward-facing side, and a fourth groove 24 on its other side that engages with the second edge 320. These technical features improve the sealing effect of the first sealing strip 10 and the second sealing strip 20.

[0029] See Figures 7 to 11The specific installation procedure for the new main and secondary door frame structure is as follows: First, place the first secondary frame 200 into the door opening, then insert wooden wedges and install expansion bolts in the second mounting holes 250 to complete mechanical anchoring; then, fill the gap between the first secondary frame 200 and the door opening through grouting, at which point the first secondary frame 200 and the door opening are completely fixed as one unit. It is important to note that a certain space needs to be left between the two sides of the outer frame 210 and the door opening for the installation of the main door frame 100 and the second secondary frame 300; then, install the adjusting plate 243 into the first sliding groove 244 and the second sliding groove 245, and then align the main door frame 100 with the first secondary frame 200, ensuring that the first limiting plate 130 fits against the inner side of the second side plate 220, and the first edging 140 is inserted between the outer frame 210 and the door opening. Then, screws are sequentially inserted into each of the first mounting holes 150 and screwed into the first threaded holes 260. During this process, the adjusting plate 243 can adaptively slide laterally so that the first threaded hole 260 on it is aligned with the screw, and the screw itself can move laterally along the length of the first mounting hole 150 to match the position of the first threaded hole 260, avoiding the first threaded hole 260 and the screw in the first mounting hole 150 not being aligned due to accuracy issues. After the screw is tightened, the other side of the second slot 170 is tightly fitted with the first height limit plate 241 and the second height limit plate 242, and is completely fixed by friction. Finally, the second sub-frame 300 is installed, the second edge band 320 is engaged with the inner frame 110, and the third edge band 330 is engaged with the outer frame 210. Then the relative positions are adjusted so that the third mounting hole 340 and the second threaded hole 270 are aligned and the screw is driven in until the other side of the first slot 350 is tightly fitted with the second side plate 220. At this time, the main and sub-frame structures are installed.

[0030] When the main door frame 100 needs to be replaced, only the connecting screw between the first threaded hole 260 and the first mounting hole 150 needs to be unscrewed to remove the main door frame 100 from the first sub-frame 200. It is not necessary to remove the first sub-frame 200 that is already fixed inside the door opening wall. This will not damage the door opening wall structure and will greatly reduce the workload and cost of the removal work. Similarly, if only the second sub-frame 300 is damaged, only the second sub-frame 300 can be removed and replaced. The maintenance flexibility is much higher than that of the traditional integrated door frame structure.

[0031] This structure, through its split-modular design, retains the stability of traditional anchor-filled installation while solving the pain point of difficult maintenance and replacement of integrated structures, making it suitable for widespread application in various types of entrance doors and armored doors.

[0032] See Figure 12This embodiment also discloses a novel armored door, including a door frame 500 and a door leaf 400, wherein the door frame 500 is the aforementioned novel main and secondary door frame structure. Since the aforementioned novel main and secondary door frame structure has the above-mentioned technical effects, the novel armored door with this novel main and secondary door frame structure also has the same technical effects. Meanwhile, since the assembly of the door frame 500 and the door leaf 400 is prior art, it will not be described in detail in this embodiment.

[0033] For details, see Figure 14 The door leaf 400 includes an outer trim panel 410, a steel plate door core 420, an interior trim panel 430, and a retaining edge 440. The retaining edge 440 binds the outer trim panel 410, the steel plate door core 420, and the interior trim panel 430 into a tight fit. The retaining edge 440 is provided with a first step surface 441 corresponding to the stop 160 and a second step surface 442 corresponding to the first side wall. A third sealing strip 30 is provided on the second step surface 442.

[0034] See Figure 13 When the door leaf 400 and the door frame 500 are fully fitted, the first sealing strip 10 and the second sealing strip 20 are simultaneously attached to the edge 440, and the third sealing strip 30 is attached to the first side wall, thereby achieving a three-layer seal and thus achieving a high sealing and strong sound insulation effect.

[0035] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A novel main and secondary door frame structure, characterized in that: The main door frame (100) includes an inner frame (110), a first side plate (120) bent and connected to one side of the inner frame (110), a first limiting plate (130) bent and connected to the other side of the inner frame (110), and a first edging (140) bent and connected to the first side plate (120). The inner frame (110) is provided with a plurality of first mounting holes (150) spaced apart along its length. The first sub-frame (200) includes a second side plate (220) that is bent and connected to one side of the outer frame (210). The outer frame (210) is provided with a plurality of positioning modules (240) and second mounting holes (250) spaced apart along its length. The positioning module (240) is provided with a first threaded hole (260). The second side plate (220) is provided with a plurality of second threaded holes (270) spaced apart along its length. The second sub-frame (300) includes a third side plate (310) and a second edge (320) and a third edge (330) bent on both sides of the third side plate (310). The third side plate (310) is provided with a plurality of third mounting holes (340) spaced apart along its length. The first limiting plate (130) is attached to the inner side of the second side plate (220), the first edging (140) is engaged with the outer frame (210), and a screw is connected between the first threaded hole (260) and the first mounting hole (150) to fix the inner frame (110) and the positioning module (240); the second edging (320) is engaged with the inner frame (110), the third edging (330) is engaged with the outer frame (210), and a screw is also connected between the third mounting hole (340) and the second threaded hole (270) to fix the third side plate (310) and the second side plate (220).

2. The novel main and secondary door frame structure according to claim 1, characterized in that: The positioning module (240) includes a first height limiting plate (241), a second height limiting plate (242), and an adjusting plate (243). The two height limiting plates are fixed relative to the outer frame (210) and set at the same height. The first height limiting plate (241) is provided with a first sliding groove (244), and the second height limiting plate (242) is provided with a second sliding groove (245). The adjusting plate (243) is slidably disposed in the two sliding grooves, and the first threaded hole (260) is disposed on the adjusting plate (243).

3. The novel main and secondary door frame structure according to claim 2, characterized in that: The adjusting plate (243) has a bend (246) on one side to restrict it from unidirectionally disengaging from the two slides.

4. The novel main and secondary door frame structure according to claim 2 or 3, characterized in that: The first mounting hole (150) is elongated and its length direction is parallel to the length direction of the inner frame (110).

5. The novel main and secondary door frame structure according to claim 1, characterized in that: The third side plate (310) is provided with a first slot (350) distributed along its length direction, and the third mounting hole (340) is provided in the first slot (350). The other side of the first slot (350) is attached to the second side plate (220).

6. The novel main and secondary door frame structure according to claim 1, characterized in that: The inner frame (110) is also provided with a stop (160) and a second slot (170) distributed along its length direction. The second slot (170) is provided with a first sealing strip (10). The first mounting hole (150) is located in the second slot (170). The other side of the second slot (170) is in contact with the positioning module (240).

7. The novel main and secondary door frame structure according to claim 6, characterized in that: The second edge (320) extends to protrude from the stop (160) and form a third groove (180), in which a second sealing strip (20) is provided.

8. The novel main and secondary door frame structure according to claim 7, characterized in that: The first sealing strip (10) has at least two oblique sealing flaps (11) on the outward side that are biased toward the stop (160); the second sealing strip (20) has a first protrusion (21), a second protrusion (22) and an arc-shaped protrusion (23) on the outward side, and a fourth slot (24) that engages with the second edge (320) on the other side.

9. A novel armored door, comprising a door frame (500) and a door leaf (400), characterized in that: The door frame (500) is a novel main and secondary door frame structure as described in any one of claims 6 to 8.

10. The novel armored door according to claim 9, characterized in that: The door panel (400) includes an outer trim panel (410), a steel plate door core (420), an interior trim panel (430), and a retaining edge (440) in sequence. The retaining edge (440) constrains the outer trim panel (410), the steel plate door core (420), and the interior trim panel (430) into a tightly fitted state. The retaining edge (440) is provided with a first step surface (441) corresponding to the stop (160) and a second step surface (442) corresponding to the first side wall. A third sealing strip (30) is provided on the second step surface (442).

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