Built-in keel structure of security door

Abstract

The utility model discloses a built-in keel structure of an anti-theft door, which comprises two side square tubes, and an upper square tube, a plurality of middle square tubes and a lower square tube are sequentially arranged between the two side square tubes from top to bottom; the bottom of the upper square pipe, the tops of the multiple middle square pipes and the top of the lower square pipe are symmetrically and fixedly connected with two inserting blocks, the outer surfaces of the multiple inserting blocks are sleeved with limiting inserting grooves, and the limiting inserting grooves are fixedly connected with the adjacent side square pipes. And two pieces of C-shaped steel are symmetrically and fixedly connected to one side of the outer surface of each middle square pipe in an embedded mode, and elastic pieces are jointly installed in the multiple pieces of C-shaped steel on the same side in an abutting mode. According to the novel anti-theft door keel, through modular design and plug-in connection, the installation mode of a traditional anti-theft door keel is obviously optimized, rapid splicing can be achieved, field welding is not needed, the installation efficiency is greatly improved, dependence on the technology of workers is reduced, the novel anti-theft door keel is suitable for efficient and large-batch production scenes, and meanwhile later maintenance and replacement are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of keel technology, and in particular to a built-in keel structure for security doors. Background Technology

[0002] The internal frame of a security door is a structural support material made of metal (such as steel or aluminum alloy), located inside the door and distributed along the perimeter of the door frame and panel. It is designed to enhance the door's strength, tensile strength, and overall stability. This design effectively resists external impacts and attempts to break in, such as prying, significantly improving the security and durability of the door. Its specific design and layout can be adjusted according to the needs of different security door models to ensure optimal protection.

[0003] Currently, most security door frames on the market are fixed and assembled using on-site welding. While this method is simple to operate, it also has some obvious limitations. First, on-site welding requires a high level of skill from workers, and the welding quality directly affects the strength of the frame and the overall security of the security door. Second, the welding process is time-consuming, especially when multiple welding points or complex structures are required, resulting in low production efficiency. Utility Model Content

[0004] This utility model is a built-in keel structure for security doors, proposed to overcome the shortcomings of existing technologies.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a built-in keel structure for a security door, comprising two side tubes, and between the two side tubes, from top to bottom, a top tube, multiple middle tubes and a bottom tube are arranged in sequence;

[0006] Two inserts are symmetrically fixedly connected to the bottom of the upper tube, the top of the multiple middle square tubes, and the top of the lower tube. The outer surface of the multiple inserts is fitted with a limiting slot, and the limiting slot is fixedly connected to the adjacent side square tube.

[0007] Two C-shaped steels are symmetrically fixedly embedded on one side of the outer surface of the multiple intermediate square tubes. Elastic members are installed together in the multiple C-shaped steels on the same side. Multiple insertion rods are fixedly connected to one side of the outer surface of the two elastic members, and the insertion rods are limited to the adjacent limiting slots and insertion blocks.

[0008] Furthermore, each of the outer surfaces of the plurality of insert blocks has a first limiting insertion hole extending to the other side, and the first limiting insertion hole matches the insert rod.

[0009] Furthermore, each of the outer surfaces of the plurality of limiting slots has a second limiting insertion hole extending to the other side, and the second limiting insertion hole matches the insertion rod.

[0010] Furthermore, both elastic elements include multiple square plates, which are located inside adjacent C-shaped steels. A spring is fixedly connected to one side of the outer surface of each of the multiple square plates, and a movable plate is fixedly connected to the other end of each of the multiple springs. Multiple connecting plates are fixedly connected to one side of the outer surface of the movable plate, and the connecting plates are fixedly connected to adjacent insert rods.

[0011] Furthermore, the length, width, and height of the upper tube, the plurality of middle square tubes, and the lower tube are consistent, and the width of the upper tube, the plurality of middle square tubes, and the lower tube are all consistent with the width of the side square tube.

[0012] Furthermore, the heads of all of the aforementioned inserts are chamfered.

[0013] The beneficial effects of this utility model are:

[0014] When in use, this utility model features a built-in keel structure for security doors. Through modular design and plug-in connection, it significantly optimizes the installation method of traditional security door keels. It can be quickly assembled without on-site welding, greatly improving installation efficiency and reducing reliance on worker skills. It is suitable for high-efficiency, high-volume production scenarios, and is also convenient for later maintenance and replacement. Attached Figure Description

[0015] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the specific embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 : A perspective view of this utility model;

[0017] Figure 2 : Front view of this utility model;

[0018] Figure 3 : Schematic diagram of the positions of the first limiting socket and the second limiting socket of this utility model.

[0019] The attached figures are labeled as follows:

[0020] 1. Side square tube; 2. Top tube; 3. Square plate; 4. Connecting plate; 5. Middle square tube; 6. Movable plate; 7. Limiting slot; 8. Spring; 9. C-shaped steel; 10. Insert block; 11. Insert rod; 12. Bottom tube; 13. First limiting insertion hole; 14. Second limiting insertion hole. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1 to 3 As shown, a built-in keel structure for a security door is disclosed, comprising two side tubes 1. Between the two side tubes 1, from top to bottom, there is an upper tube 2, multiple middle square tubes 5, and a lower tube 12. The upper tube 2, multiple middle square tubes 5, and lower tube 12 have the same length, width, and height, and the width of the upper tube 2, multiple middle square tubes 5, and lower tube 12 is the same as the width of the side tubes 1, ensuring the uniformity and standardization of the keel structure, which facilitates mass production and installation.

[0023] Two insert blocks 10 are symmetrically and fixedly connected to the bottom of the upper tube 2, the top of the multiple middle square tubes 5, and the top of the lower tube 12. The outer surface of the multiple insert blocks 10 is fitted with a limiting slot 7, and the limiting slot 7 is fixedly connected to the adjacent side square tube 1. This design enables the components to be quickly positioned and spliced, avoiding the complexity and time-consuming problems of traditional welding methods.

[0024] Two C-shaped steels 9 are symmetrically fixedly embedded on one side of the outer surface of multiple intermediate square tubes 5. Elastic elements are installed together inside the multiple C-shaped steels 9 on the same side. Multiple insert rods 11 are fixedly connected to one side of the outer surface of the two elastic elements. Both elastic elements include multiple square plates 3, and the square plates 3 are located inside the adjacent C-shaped steels 9. Springs 8 are fixedly connected to one side of the outer surface of the multiple square plates 3. Movable plates 6 are fixedly connected to the other end of the multiple springs 8. Multiple connecting plates 4 are fixedly connected to one side of the outer surface of the movable plate 6, and the connecting plates 4 are fixedly connected to the adjacent insert rods 11. This elastic element design enhances the fixing effect of the insert rods 11.

[0025] Furthermore, the insertion rod 11 is positioned and inserted into adjacent limiting slots 7 and insertion blocks 10. Each of the multiple insertion blocks 10 has a first limiting insertion hole 13 extending to the other side on one side of its outer surface, and the first limiting insertion hole 13 matches the insertion rod 11. Similarly, each of the multiple limiting slots 7 has a second limiting insertion hole 14 extending to the other side on one side of its outer surface, and the second limiting insertion hole 14 matches the insertion rod 11. This multi-point limiting insertion design ensures a tight connection between the various components of the keel, avoiding deformation or stress concentration problems that may arise from welding. In addition, the heads of the multiple insertion rods 11 are chamfered to facilitate smooth insertion into the limiting insertion holes, further improving the convenience and efficiency of installation.

[0026] Working principle: When splicing the keel, place the two side square tubes 1 on the workbench, and then place the upper tube 2, the middle square tube 5 and the lower tube 12 in sequence. When placing them, the corresponding inserts 10 should be inserted into the corresponding limit slots 7. Then install the elastic element on one side. First, place the square plate 3 into the corresponding C-shaped steel 9, and then press the spring 8 through the movable plate 6. Then place the movable plate 6 into the C-shaped steel 9. Next, release the movable plate 6. The spring 8 pushes the movable plate 6 away from the square plate 3. Then, under the action of the connecting plate 4, insert the rod 11 into the corresponding first limit socket 13 and second limit socket 14. Then repeat the above operation to install the elastic element on the other side and insert the rod 11 into the corresponding first limit socket 13 and second limit socket 14, thereby completing the splicing of the keel.

[0027] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A built-in keel structure for a security door, comprising two side square tubes (1), characterized in that: Between the two side tubes (1), from top to bottom, there is a top tube (2), a plurality of middle square tubes (5) and a bottom tube (12); The bottom of the upper tube (2), the top of the multiple middle square tubes (5), and the top of the lower tube (12) are all symmetrically and fixedly connected with two plugs (10). The outer surface of the multiple plugs (10) is provided with a limiting slot (7), and the limiting slot (7) is fixedly connected to the adjacent side square tube (1). Two C-shaped steels (9) are symmetrically fixedly embedded on one side of the outer surface of the multiple intermediate square tubes (5). Elastic members are installed together in the multiple C-shaped steels (9) on the same side. Multiple insertion rods (11) are fixedly connected to one side of the outer surface of the two elastic members, and the insertion rods (11) are limited to the adjacent limiting slots (7) and insertion blocks (10).

2. The internal keel structure of a security door according to claim 1, characterized in that: Each of the multiple insert blocks (10) has a first limiting insertion hole (13) extending through to the other side on one side of its outer surface, and the first limiting insertion hole (13) matches the insertion rod (11).

3. The internal keel structure of a security door according to claim 1, characterized in that: Each of the multiple limiting slots (7) has a second limiting insertion hole (14) on one side of its outer surface that extends to the other side, and the second limiting insertion hole (14) matches the insertion rod (11).

4. The internal keel structure of a security door according to claim 1, characterized in that: Both elastic elements include multiple square plates (3), and the square plates (3) are located inside the adjacent C-shaped steel (9). A spring (8) is fixedly connected to one side of the outer surface of each of the multiple square plates (3), and a movable plate (6) is fixedly connected to the other end of the multiple springs (8). A multiple connecting plates (4) are fixedly connected to one side of the outer surface of the movable plate (6), and the connecting plates (4) are fixedly connected to the adjacent insert rod (11).

5. The internal keel structure of a security door according to claim 1, characterized in that: The upper tube (2), the multiple middle square tubes (5) and the lower tube (12) have the same length, width and height, and the width of the upper tube (2), the multiple middle square tubes (5) and the lower tube (12) is the same as the width of the side square tube (1).

6. The internal keel structure of a security door according to claim 1, characterized in that: The heads of all of the aforementioned inserts (11) are chamfered.

Images