Improved installation structure for existing doors and windows
By using sliding plates and mounting plates to connect old and new door frames with screws in old buildings, combined with corner plates and foam adhesive, the high workload and damage caused by the removal of old doors and windows in existing technologies are solved, achieving efficient and low-damage door and window renovation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 江苏高昕建筑系统有限公司
- Filing Date
- 2025-04-22
- Publication Date
- 2026-04-17
AI Technical Summary
Existing technologies require the removal of existing doors and windows during the renovation of old buildings, resulting in a large workload, damage to the building, and reduced work efficiency.
The first sliding plate, the second sliding plate, the first mounting plate, and the second mounting plate are used to connect with the old door frame and the new door frame. They are fixed with screws, and the corner plate is connected to the screw holes of the new door frame. Foam adhesive is used to enhance the sealing, so as to achieve direct installation of the old door frame and the new door frame.
It reduced workload, minimized damage to buildings, improved installation efficiency, and enhanced the sealing and sound insulation of doors and windows.
Smart Images

Figure CN224134480U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of door and window renovation technology, specifically to an existing door and window renovation and installation structure. Background Technology
[0002] Many buildings today are old. During the renovation of old buildings, doors and windows are often modified to improve insulation and soundproofing, replacing them with insulated and soundproof windows to enhance the comfort of the indoor environment.
[0003] Faced with the many drawbacks of old doors and windows, various renovation methods have emerged. The common approach in the market is to remove the original old doors and windows and replace them with the required new ones. However, this method requires damage to the wall structure, involves a large amount of work, and affects work efficiency. Therefore, a renovation and installation structure for existing doors and windows has been proposed. Utility Model Content
[0004] In view of the shortcomings of the existing technology, this utility model provides an existing door and window renovation and installation structure to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an existing door and window renovation and installation structure, including an old door frame and a new door frame. First sliding plates are movably inserted into the interior of both the left and right sides of the new door frame, and a first mounting plate is fixedly connected to the outer surface of the first sliding plate. Second sliding plates are movably inserted into the interior of both the upper and lower sides of the new door frame, and a second mounting plate is fixedly connected to the outer surface of the second sliding plate. First screw holes are provided around the perimeter of the new door frame and on the outer surfaces of the first and second sliding plates. The number of first screw holes on the outer surfaces of the first and second sliding plates is several and arranged in a linear array. First screws are threaded into the first screw holes corresponding to the surfaces of the first and second sliding plates on the new door frame.
[0006] Furthermore, the inner walls of the first mounting plate, the second mounting plate, and the old door frame are provided with second screw holes, and the first mounting plate and the second mounting plate are respectively threaded with second screws in the corresponding second screw holes of the inner wall of the old door frame.
[0007] Furthermore, corner plates are provided at all four corners of the new door frame, and third screw holes are provided at the four corners of the new door frame and on the outer surface of the corner plates. The third screw holes on the outer surface of the new door frame and the corresponding third screw holes on the outer surface of the corner plates are internally threaded with third screws.
[0008] Furthermore, the thickness of the first mounting plate and the second mounting plate in the front-to-back direction is greater than the thickness of the new door frame.
[0009] Furthermore, the third screw holes on the outer surface of the corner plate are all arranged in an inclined linear array.
[0010] Furthermore, foam adhesive is injected into the gap between the old door frame and the new door frame.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] 1. The existing door and window renovation and installation structure, by setting a first sliding plate, a second sliding plate, a first mounting plate and a second mounting plate, and with the help of the first screw and the second screw, connects the old door frame to the new door frame, so that the old frame can be directly installed as a pre-embedded part without dismantling the old frame, reducing the workload and minimizing damage to the building.
[0013] 2. The existing door and window renovation and installation structure connects the old door frame to the new door frame, aligns the corner plate with the third screw hole on the surface of the new door frame, and screws the third screw into the third screw hole to block the gap between the old door frame and the new door frame. Attached Figure Description
[0014] Figure 1 This is a front view structural diagram of the present invention;
[0015] Figure 2 This is a schematic diagram of the rear view structure of this utility model;
[0016] Figure 3 This is a schematic diagram of the front sectional view of the present invention;
[0017] Figure 4 This utility model Figure 1 Enlarged structural diagram at point A in the middle.
[0018] In the diagram: 1. Old door frame; 2. New door frame; 3. First sliding plate; 4. First mounting plate; 5. Second sliding plate; 6. Second mounting plate; 7. First screw hole; 8. First screw; 9. Second screw; 10. Corner plate; 11. Third screw hole; 12. Third screw. Detailed Implementation
[0019] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0020] Example 1:
[0021] Please refer to the following: Figures 1-4This utility model provides a technical solution: an existing door and window renovation and installation structure, including an old door frame 1 and a new door frame 2. First sliding plates 3 are movably inserted into the interior of both the left and right sides of the new door frame 2. A first mounting plate 4 is fixedly connected to the outer surface of the first sliding plate 3. Second sliding plates 5 are movably inserted into the interior of both the top and bottom sides of the new door frame 2. A second mounting plate 6 is fixedly connected to the outer surface of the second sliding plate 5. First screw holes 7 are provided around the perimeter of the new door frame 2 and on the outer surfaces of the first sliding plates 3 and 5. The number of first screw holes 7 on the outer surfaces of the first sliding plates 3 and 5 is several and arranged in a linear array. The sliding plate 3 and the second sliding plate 5 are internally threaded with the first screw 7 corresponding to the surface of the new door frame 2, and the first screw 8 is screwed into the corresponding first screw hole 7. Specifically, the first screw 8 is unscrewed, the position of the first sliding plate 3 and the second sliding plate 5 is adjusted so that the first screw hole 7 on the outside of the new door frame 2 corresponds to the first screw hole 7 on the first sliding plate 3 and the second sliding plate 5. Then the first screw 8 is screwed into the corresponding first screw hole 7 to limit the distance between the first sliding plate 3 and the second sliding plate 5 and the new door frame 2. In this way, the old frame can be directly installed as a pre-embedded part without disassembling the old frame, which reduces the workload and also reduces damage to the building.
[0022] In this embodiment, the inner walls of the first mounting plate 4, the second mounting plate 6, and the old door frame 1 are provided with second screw holes. The first mounting plate 4 and the second mounting plate 6 are respectively connected to the second screw holes corresponding to the inner walls of the old door frame 1 with second screws 9. Specifically, the first mounting plate 4 and the second mounting plate 6 contact the inner walls of the old door frame 1, and then the second screws 9 are screwed into the second screw holes to connect the first mounting plate 4 and the second mounting plate 6 to the old door frame 1.
[0023] In this embodiment, corner plates 10 are provided at all four corners of the new door frame 2. Third screw holes 11 are provided at the four corners of the new door frame 2 and on the outer surface of the corner plates 10. Third screws 12 are threaded into the third screw holes 11 on the outer surface of the new door frame 2 and the corresponding third screw holes 11 on the outer surface of the corner plates 10. Specifically, after the old door frame 1 is connected to the new door frame 2, the corner plates 10 are aligned with the third screw holes 11 on the surface of the new door frame 2, and the third screws 12 are screwed into the third screw holes 11 to block the gap between the old door frame and the new door frame 2.
[0024] In this embodiment, the thickness of the first mounting plate 4 and the second mounting plate 6 in the front-to-back direction is greater than the thickness of the new door frame 2. Specifically, the second screw hole is located at the position where the first mounting plate 4 and the second mounting plate 6 extend to the outside of the new door frame 2, so as not to affect the screwing in of the second screw 9.
[0025] In this embodiment, the third screw holes 11 on the outer surface of the corner plate 10 are all arranged in an inclined linear array. Specifically, the position of the corner plate 10 can be adjusted by the third screw holes 11 arranged in an inclined linear array, so that the corner plate 10 fits against the inner wall of the old door frame 1.
[0026] In this embodiment, foam adhesive is injected into the gap between the old door frame 1 and the new door frame 2. Specifically, the foam adhesive is used to increase the sealing between the old door frame 1 and the new door frame 2.
[0027] Working principle: In use, the old door and window are disassembled, leaving the old door frame 1. According to the dimensions between the new door frame 2 and the old door frame 1, the first screw 8 is unscrewed, and the positions of the first sliding plate 3 and the second sliding plate 5 are adjusted so that the first mounting plate 4 and the second mounting plate 6 contact the inner wall of the old door frame 1. Then, the second screw 9 is screwed into the second screw hole to connect the first mounting plate 4 and the second mounting plate 6 to the old door frame 1, so that the first screw hole 7 on the outside of the new door frame 2 corresponds to the first screw hole 7 on the first sliding plate 3 and the second sliding plate 5. Then, the first screw 8 is screwed into the corresponding first screw hole 7 to limit the distance between the first sliding plate 3 and the second sliding plate 5 and the new door frame 2. Thus, the old frame can be directly installed as a pre-embedded part without disassembling the old frame, reducing the workload and minimizing damage to the building.
[0028] After connecting the old door frame 1 to the new door frame 2, align the corner plate 10 with the third screw hole 11 on the surface of the new door frame 2, screw the third screw 12 into the third screw hole 11 to block the gap between the old door frame and the new door frame 2, and then inject foam glue into the gap between the new door frame 2 and the old door frame 1 to increase the sealing.
[0029] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A retrofit installation structure for existing doors and windows, comprising an old door frame (1) and a new door frame (2), characterized in that: The new door frame (2) has a first sliding plate (3) movably inserted inside both the left and right sides. The outer surface of the first sliding plate (3) is fixedly connected to a first mounting plate (4). The new door frame (2) has a second sliding plate (5) movably inserted inside both the upper and lower sides. The outer surface of the second sliding plate (5) is fixedly connected to a second mounting plate (6). The new door frame (2) has a first screw hole (7) on all four sides, the outer surface of the first sliding plate (3) and the second sliding plate (5). The number of first screw holes (7) on the outer surface of the first sliding plate (3) and the second sliding plate (5) is several and arranged in a linear array. The first sliding plate (3) and the second sliding plate (5) are internally threaded with the first screw hole (7) corresponding to the surface of the new door frame (2) and are connected with a first screw (8).
2. The retrofit installation structure for existing doors and windows according to claim 1, characterized in that: The inner walls of the first mounting plate (4), the second mounting plate (6) and the old door frame (1) are provided with second screw holes. The first mounting plate (4) and the second mounting plate (6) are respectively connected to the second screw holes corresponding to the inner walls of the old door frame (1) with second screws (9).
3. The retrofit installation structure for existing doors and windows according to claim 1, characterized in that: The new door frame (2) is provided with corner plates (10) at all four corners. The corners of the new door frame (2) and the outer surfaces of the corner plates (10) are provided with third screw holes (11). The third screw holes (11) on the outer surface of the new door frame (2) and the corresponding third screw holes (11) on the outer surface of the corner plates (10) are internally threaded with third screws (12).
4. The retrofit installation structure for existing doors and windows according to claim 1, characterized in that: The thickness of the first mounting plate (4) and the second mounting plate (6) in the front-to-back direction is greater than the thickness of the new door frame (2).
5. The retrofit installation structure for existing doors and windows according to claim 3, characterized in that: The third screw holes (11) on the outer surface of the corner plate (10) are all arranged in an inclined linear array.
6. The retrofit installation structure for existing doors and windows according to claim 1, characterized in that: Foam adhesive is injected into the gap between the old door frame (1) and the new door frame (2).