Hidden fireproof door structure

Abstract

The utility model discloses a hidden type fireproof door structure which comprises an upper door frame and a lower door frame which are correspondingly arranged in parallel up and down, two side door frames are arranged between the upper door frame and the lower door frame, the two ends of each side door frame are connected with the ends of the upper door frame and the lower door frame to form a square door frame, and door columns are rotationally arranged at the two ends of the upper door frame and the two ends of the lower door frame. The four door columns are matched and correspond in pairs in the vertical direction, and a door leaf matched with the square door frame in size and shape is arranged between every two matched door columns. The door has the beneficial effects that no exposed hinge is arranged, so that the door is more attractive when being closed, and is not easy to erode by the external environment.

Description

Technical Field

[0001] This utility model relates to the field of fire door technology, specifically to a concealed fire door structure. Background Technology

[0002] Currently, most door frame hinges on the market are exposed. Not only are they unsightly when the door is closed, but they are also prone to corrosion due to being exposed for extended periods, which reduces their performance.

[0003] Therefore, it is necessary to propose a concealed fire door structure without exposed hinges, which makes the door more aesthetically pleasing when closed and less susceptible to corrosion from the external environment. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the existing technology and propose a concealed fire door structure without exposed hinges, which makes the door more aesthetically pleasing when closed and less susceptible to corrosion from the external environment.

[0005] The purpose of this utility model is achieved through the following technical solution: a concealed fire door structure, including an upper door frame and a lower door frame arranged in parallel and corresponding positions, two side door frames arranged between the upper door frame and the lower door frame, the two ends of the side door frames being connected to the ends of the upper door frame and the lower door frame to form a square door frame, door posts being rotatably arranged at both ends of the upper door frame and the lower door frame, the four door posts being matched and corresponding in pairs, and a door leaf matching the size and shape of the square door frame being arranged between the two matching door posts.

[0006] The door frame has a U-shaped recess on its outer side.

[0007] The upper and lower door frames are equipped with locking blocks on adjacent sides.

[0008] The upper and lower door frames are provided with openings for the doorposts to rotate through. The inner walls of the openings have limiting grooves with one end open on both sides. The outer walls of the doorposts have multiple evenly distributed ring-shaped slots. The slots are matched with the limiting grooves. A sliding rod slides through the limiting grooves. A limiting ball is provided at the end of the sliding rod. A return spring is sleeved on the sliding rod. When the return spring is in its natural state, the limiting ball abuts against the slot.

[0009] The slide bar has a pressure block at one end inside the door frame, and the two ends of the return spring are connected to the pressure block and the limiting groove, respectively.

[0010] A magnet is provided at one end of the limiting groove near the pressure block, and an electromagnet is provided inside the pressure block.

[0011] The beneficial effects of this utility model are: by setting doorposts to control the rotation of the door leaf, the door leaf rotation is controlled without exposed hinges, which makes the door more aesthetically pleasing when closed. Furthermore, the doorposts are hidden inside the door frame and door leaf, making them less susceptible to corrosion from the external environment, thus not reducing the rotation performance of the door leaf. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the present invention;

[0013] Figure 2 This is a diagram showing the connection of the limiting balls;

[0014] In the diagram, 1. Upper door frame; 2. Lower door frame; 3. Side door frame; 4. Door post; 5. Door leaf; 6. U-shaped recess; 7. Locking block; 8. Through opening; 9. Limiting groove; 10. Locking slot; 11. Sliding rod; 12. Limiting ball; 13. Return spring; 14. Pressure block; 15. Magnet; 16. Electromagnet; 17. Door closer. Detailed Implementation

[0015] 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, and 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.

[0016] It should be noted that the directional concepts of "left", "right", "up", "down", "front", "back", "inner", and "outer" in the following scheme are all relative directions, and will not be listed one by one here.

[0017] A concealed fire door structure, reference Figure 1 and Figure 2 The system includes an upper door frame 1 and a lower door frame 2, arranged vertically. Side door frames 3 are located between both ends of the upper and lower door frames 1 and 2. The two ends of the side door frames 3 are connected to the upper and lower door frames 1 and 2, respectively. The upper, lower, and side door frames 1 and 2 form a square door frame. Both ends of the upper and lower door frames 1 and 2 have openings 8, through which doorposts 4 are inserted. The outer walls of the upper, lower, and side door frames 1 and 2 have U-shaped recesses 6. Wall tiles can be applied to the U-shaped recesses 6, integrating them with the wall surface. Door leaves 5, connected to both sides of the two matching doorposts 4, are located between them. The size and shape of the two door leaves 5 match the door frame. Two locking blocks 7 and a door closer 17 are located on the lower side of the upper door frame 1 and the upper side of the lower door frame 2 to hold the door leaves 5 in place.

[0018] Two opposing limiting grooves 9 are formed on the inner wall of the opening 8. The upper door frame 1 and the lower door frame 2 are hollow. Multiple annularly distributed latches 10 are evenly distributed around the perimeter of the doorpost 4. A sliding rod 11 slides through the limiting groove 9. A limiting ball 12 is movably mounted at one end of the sliding rod 11 inside the limiting groove 9, and a pressure block 14 is mounted at the other end inside the door frame. A return spring 13, with both ends connected to the pressure block 14 and the limiting groove 9, is positioned between the pressure block 14 and the limiting groove 9. The return spring 13 is sleeved on the sliding rod 11. When the return spring 13 is in its natural state, the limiting ball 12 abuts against the latches 10. An electromagnet 16 is installed inside the pressure block 14, and a magnet 15 is mounted at the end of the limiting groove 9 near the pressure block 14.

[0019] When in normal use, both door panels 5 are open. Due to the action of the return spring 13, the door panels 5 will not easily move, thus blocking pedestrians from walking. When the door panels 5 are closed, in addition to the door closer 17 and the latch 7 holding the door panels 5 in place, the electromagnet 16 generates a magnetic force opposite to that of the magnet 15. The two are firmly attracted, so that the resistance that the limiting ball 12 has to overcome when it wants to leave the latch 10 is extremely large. As a result, the limiting ball 12 is approximately fixedly connected to the latch 10, thereby limiting the rotation of the door panels 5 and ensuring that both door panels 5 are firmly closed, thus ensuring that the fire does not spread.

[0020] The above description is merely a preferred embodiment of this utility model. It should be understood that this utility model is not limited to the form disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above description or the technology or knowledge in related fields. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this utility model should be protected within the scope of the appended claims.

Claims

1. A concealed fire door construction, characterised in that, It includes an upper door frame and a lower door frame arranged in parallel and corresponding positions. Two side door frames are arranged between the upper and lower door frames. The two ends of the side door frames are connected to the ends of the upper and lower door frames to form a square door frame. Door posts are rotatably arranged at both ends of the upper and lower door frames. The four door posts are matched and corresponded in pairs. A door leaf matching the size and shape of the square door frame is arranged between the two matching door posts.

2. A concealed fire door construction according to claim 1, wherein: The door frame has a U-shaped recess on its outer side. ​ 3. A concealed fire door construction according to claim 1, wherein: The upper and lower door frames are equipped with a locking block and a door closer on an adjacent side.

4. A concealed fire door construction according to claim 1, wherein: The upper and lower door frames are provided with openings for the doorposts to rotate through. The inner walls of the openings have limiting grooves with one end open on both sides. The outer walls of the doorposts have multiple evenly distributed ring-shaped slots. The slots are matched with the limiting grooves. A sliding rod slides through the limiting grooves. A limiting ball is provided at the end of the sliding rod. A return spring is sleeved on the sliding rod. When the return spring is in its natural state, the limiting ball abuts against the slot.

5. A concealed fire door construction according to claim 4, wherein: The slide bar has a pressure block at one end inside the door frame, and the two ends of the return spring are connected to the pressure block and the limiting groove, respectively.

6. A concealed fire door construction according to claim 5, wherein: A magnet is provided at one end of the limiting groove near the pressure block, and an electromagnet is provided inside the pressure block.

Images