Window sub-frame anti-leakage structure and construction method
By forming a closed space between the window subframe and the concrete structure and filling waterproof mortar, combined with the shaped mold and grouting process, the problem of difficult to ensure the quality of the window subframe plug joint is solved, high-quality anti-leakage effect is achieved, and construction costs are reduced.
Patent Information
- Application Number
- CN202310015317.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2023-01-05
- Publication Date
- 2025-08-26
- Estimated Expiration
- 2043-01-05
AI Technical Summary
The window subframe is prone to leakage problems during installation, and the quality of the plug joints is difficult to guarantee, which is greatly affected by the workers' skills and management, which affects the project progress and cost.
The window subframe anti-leakage structure is adopted, and the window subframe is connected to the concrete structure through the first connection part to form a closed space, and waterproof mortar is poured into it, combining the shaped mold and grouting process to ensure the forming quality and compactness of the plug joints.
It effectively solves the problem of leaking between the window frame plugs, reduces the dependence on workers' skills and management, improves construction quality and cost control, and reduces leakage and repair costs.
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Figure CN116378540B_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of building construction, and in particular relates to a window sub-frame anti-leakage structure and a construction method. Background Art
[0002] Due to the long processing cycle of windows and the high installation precision requirements, once the windows are produced, their size cannot be adjusted. However, the precision during the civil construction phase is usually difficult to control. If the window frames are produced and processed in advance according to the drawing dimensions, the reserved window openings will be too large, resulting in leakage problems, while too small will not be able to be installed. Both of these will cause many hidden dangers and waste, and affect the progress of the project. In order to solve this problem and speed up the progress of the project, the method of setting up window sub-frames is usually adopted in the project to solve the problem of inconsistent window opening sizes during the civil construction process, facilitating the early production and processing of windows.
[0003] However, the use of window subframes still has certain drawbacks. During the installation process, improper handling of the connection points with the structure can easily cause leakage. Due to the relatively small gaps in this location, caulking is difficult. The quality of its construction is greatly affected by the workers' craftsmanship, sense of responsibility, and supervision. It is common to see leaks and incomplete caulking. Moreover, observation alone is not enough to confirm the quality of the completed work. In view of the problems and defects in the existing technology, it is necessary to improve it. Summary of the Invention
[0004] In order to solve the above problems in the prior art, the present invention provides a window sub-frame anti-leakage structure and construction method, so as to overcome the problem that the quality of the window sub-frame caulking is not guaranteed and the risk of leakage often occurs.
[0005] To achieve the above object, the present invention adopts the following technical solutions:
[0006] As one aspect of the present invention, a window sub-frame anti-leakage structure is provided, which comprises: a window sub-frame connected to a concrete structure,
[0007] The first connecting portion is used to connect the window sub-frame to the concrete structure, so that a closed space is formed between the window sub-frame and the concrete structure, and waterproof mortar is filled in the closed space.
[0008] Optionally, the first connecting portion includes a first connecting piece, and the front and rear sides of the window sub-frame are respectively connected to the first connecting piece, and the first connecting piece is connected to the concrete structure, so that the first connecting piece, the window sub-frame and the concrete structure together form an enclosed space.
[0009] Optionally, the first connecting part also includes a second connecting member and a first fastener, the second connecting member clamps the first connecting member located on both sides of the window sub-frame, and the second connecting member is located on the outside of the window sub-frame; the first fastener is passed through the second connecting member, the bottom of the window sub-frame is connected to the first fastener, and the lower end of the first connecting member is connected to the first fastener; the two ends of the first fastener are respectively located on the outside of the second connecting member, and the two ends of the first fastener are respectively connected to the second fastener.
[0010] Optionally, a protective piece is sleeved on the first fastener, and the length of the protective piece is consistent with the width of the window sub-frame.
[0011] Optionally, a supporting portion is further included, and the second connecting members located at relative positions of the window sub-frames are connected via the supporting portion.
[0012] Optionally, the support portion includes a support rod, and support members for supporting the second connecting member are formed at both ends of the support rod; and an adjusting screw is connected to the support member.
[0013] Optionally, a grouting piece is further included, which is connected to the second connecting piece. A grouting port is provided on the grouting piece, and the grouting port is connected to the first connecting piece, the window sub-frame and the concrete body structure to form a regular enclosed space.
[0014] Optionally, a rubber strip is connected between the grouting member and the concrete structure.
[0015] Optionally, a grouting overflow piece is further included, and the grouting overflow piece is detachably connected to the grouting port.
[0016] As another aspect of the present invention, a construction method for the above-mentioned window sub-frame anti-leakage structure is provided. The specific construction operation is as follows: in advance, a first fastener is inserted into a reserved hole on a second connecting member, and the second fasteners are screwed onto both ends of the first fastener, but not tightened, so that the second connecting member remains in a loose state;
[0017] Secondly, temporarily fix the window sub-frame; leave a uniform gap between the window sub-frame and the concrete structure, then place the two sides of the two first connecting pieces close to the window sub-frame and the concrete structure, and then clamp the two first connecting pieces and the window sub-frame with the pre-prepared loose second connecting pieces. After adjusting the position, tighten the second fasteners at both ends.
[0018] Then, align the support part with the middle position of the second connecting piece that has been installed on the window sub-frame, and tighten it with the adjusting screws on the support part. Finally, install the grouting parts on the four corners of the window sub-frame in sequence, align the reserved installation grooves on the grouting parts with the first fasteners and install them so that the grouting parts are installed on the outside of the second connecting piece. At this point, the grouting mold is fully installed and ready to start the grouting work.
[0019] Grouting starts from the lower left side of the window sub-frame, and grouting overflow pieces are installed on the two adjacent grouting pieces, and the outlet of the grouting overflow pieces is kept upward. If waterproof mortar is found to overflow from one of the grouting overflow pieces during the grouting process, it is considered that the enclosed space between the two grouting ports is full, and the grouting port is sealed, and the grouting overflow piece is installed on the next grouting port until all the grouting ports overflow with waterproof mortar. The grouting is completed, all the grouting ports are sealed, and maintenance is carried out. After the demolding conditions are met, the formwork is removed for the next window construction.
[0020] The beneficial effects of the window sub-frame anti-leakage structure and construction method of the present invention are specifically reflected in: 1. It effectively solves the problems of difficult construction, easy leakage, and lack of quality assurance measures in the conventional window sub-frame caulking process. Through standardized molds and grouting processes, the molding quality and density of the caulking are guaranteed, greatly reducing the dependence on workers' skills and management.
[0021] 2. The mold can be reused and is easy to install, which has little impact on the construction cost. The reduced leakage repair costs in the later stage can reduce the overall cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] The drawings in the specification, which constitute a part of this application, are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.
[0023] Figure 1 This is a schematic diagram of the window sub-frame anti-leakage structure of the present invention;
[0024] Figure 2 for Figure 1 Middle AA section view;
[0025] Figure 3 for Figure 1 Middle BB cross-section;
[0026] Figure 4 It is a structural schematic diagram of the grouting member of the present invention;
[0027] Figure 5 It is a structural schematic diagram of the grouting overflow part of the present invention. DETAILED DESCRIPTION
[0028] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation methods in conjunction with the accompanying drawings.
[0029] The embodiments of the present application provide a window sub-frame anti-leakage structure and a construction method to solve the problem of insufficient quality assurance of the caulking of the window sub-frame and the frequent risk of leakage.
[0030] The technical solution of the embodiment of the present application is to solve the problem that the quality of the caulking of the above-mentioned window sub-frame is not guaranteed and the risk of leakage often occurs. The specific description is as follows:
[0031] An embodiment of the present invention provides a window sub-frame anti-leakage structure, such as Figure 1 As shown, it includes: a window sub-frame 1 connected to a concrete body structure 11. It should be noted that the concrete body structure 11 is a cast concrete component. The window sub-frame 1 fixes and protects the window main frame. Therefore, the concrete body structure 11 is a prior art and its structure is not described in detail. The window sub-frame 1 is a prior art and its structure is not described in detail.
[0032] The first connection portion, the window sub-frame 1 is connected to the concrete structure 11 through the first connection portion, so that a closed space is formed between the window sub-frame 1 and the concrete structure 11, and waterproof mortar 7 is filled in the closed space.
[0033] As a specific illustration, in this embodiment, Figure 1 As shown, the proposed first connecting part includes a first connecting member 5. As an example, the first connecting member 5 is an L-shaped angle aluminum. The front and rear sides of the window sub-frame 1 are respectively connected with the first connecting member 5, and the first connecting member 5 is connected to the concrete body structure 11. Specifically, one end of the first connecting member 5 is connected to the window sub-frame 1, and the other end of the first connecting member 5 is connected to the concrete body structure 11, so that the first connecting member 5, the window sub-frame 1 and the concrete body structure 11 together form a regular enclosed space.
[0034] As an example, the first connecting member 5 is an L-shaped aluminum angle, which is installed on the front and rear sides of the window sub-frame 1 and is used as a side template for the enclosed space. It is set according to the width and height of the window.
[0035] As a further illustration, in this embodiment, Figure 1-Figure 3As shown, the proposed first connecting part also includes a second connecting member 4 and a first fastener 3. The second connecting member 4 is a U-shaped clamping member, which is clamped on the outside of the left and right L-shaped angle aluminums. The length of each section is 500 to 700 mm, and the appropriate length and number are selected according to the width and height of the window; the second connecting member 4 clamps the first connecting members 5 located on both sides of the window sub-frame 1, and the second connecting member 4 is located on the outside of the window sub-frame 1; the first fastener 3 is passed through the second connecting member 4, the bottom of the window sub-frame 1 is connected to the first fastener 3, and the lower end of the first connecting member 5 is connected to the first fastener 3, so that the first fastener 3 limits the relative position of the window sub-frame 1 and the first connecting member 5 respectively; the second connecting member 4 The two ends of a fastener 3 are respectively located on the outside of the second connecting member 4, and the two ends of the first fastener 3 are respectively threadedly connected to the second fastener 6; gaskets are respectively provided on both sides of the first fastener 3, and the gaskets are located on the inner side of the second fastener 6 to strengthen the relative fixation between the second fastener 6 and the second connecting member 4; as an example, the second connecting member 4 is a U-shaped clamp, and the first fastener 3 is a screw rod. When in use, the U-shaped clamp clamps the L-shaped angle aluminum located on both sides of the window sub-frame 1, and then the screw rod passes through the U-shaped clamp, and the two ends of the screw rod are threadedly connected to the nuts for fixing, so that the U-shaped clamp clamps the L-shaped angle aluminum located on both sides of the window sub-frame 1 to achieve relative fixation of the window sub-frame 1.
[0036] As a further illustration, in this embodiment, Figure 2-Figure 3 As shown, a protective member 2 is sleeved on the first fastener 3. The protective member 2 is a PVC sleeve whose length is consistent with the width of the window sub-frame 1. It is used to tighten the U-shaped clip on the inside to prevent the second connecting member 4 from being deformed due to excessive tension between the first fastener 3 and the second fastener 6.
[0037] As a further illustration, in this embodiment, Figure 1-Figure 3 As shown, the proposed window sub-frame anti-leakage structure also includes a support portion 9, and the second connecting members 4 located at relative positions of the window sub-frame 1 are connected through the support portion 9, which plays a supporting role for the second connecting members 4 located at relative positions of the window sub-frame 1, thereby realizing a relative fixed connection between the first connecting member 5 and the concrete structure 11.
[0038] As a further illustration, in this embodiment, Figure 1-Figure 3 As shown, the proposed support portion 9 includes a support rod 91, and support members 92 for supporting the second connecting member 4 are respectively formed at both ends of the support rod 91, and the support members 92 are groove-shaped, which is convenient for supporting the second connecting member 4; the support portion 9 is arranged between the upper and lower window sub-frames, and the two ends respectively support the U-shaped clips above and below the window sub-frames to prevent the upper U-shaped clip from falling off, and one is set in the middle of each U-shaped clip.
[0039] As a further explanation, in this embodiment, the support member 92 is connected to an adjusting screw for tightly pressing against the second connecting member 4 .
[0040] As a further illustration, in this embodiment, Figure 1 、 Figure 4 As shown, the proposed window sub-frame anti-leakage structure also includes a grouting member 8, which is connected to the second connecting member 4, and a rubber strip 10 is connected between the grouting member 8 and the concrete body structure 11; the rubber strip 10 is pressed under the grouting member 8 to fill the gap between the grouting member 8 and the concrete body structure 11; a grouting port 81 is provided on the grouting member 8, and the grouting port 81 is connected to the first connecting member 5, the window sub-frame 1 and the concrete body structure 11 to form a regular enclosed space to be grouted with waterproof mortar 7 in the enclosed space; the grouting method of the waterproof mortar 7 is to grout from the bottom to the top of the window sub-frame 1 and from the left to the right of the window sub-frame 1 through the grouting port 81 reserved on the grouting member 8.
[0041] As an example, in this embodiment, the window sub-frame 1 is rectangular, the grouting piece 8 is a corner L-shaped aluminum angle, the corner L-shaped aluminum angle is connected to the four corners of the window sub-frame 1, the grouting piece 8 is arranged on the surface of the second connecting piece 4, and is fixed by the first fastener 3 and the second fastener 6; the grouting piece 8 is provided with a mounting groove 82 for the installation and clearance of the first fastener 3; the four corners of the window sub-frame 1 are provided with corner L-shaped aluminum angles, which are arranged on the outside of the second connecting piece 4, and the first fastener 3 passes through the mounting groove 82 to clamp the grouting piece 8, the second connecting piece 4, the first connecting piece 5, and the window sub-frame 1 together to form an effective fixation.
[0042] As a further illustration, in this embodiment, Figure 5 As shown, the proposed window sub-frame anti-leakage structure also includes a grouting overflow member 12, which is a stainless steel bent pipe, which can be detachably connected to the grouting port 81 where grouting is not being performed. As a means of detecting the fullness of the enclosed space, it is installed on the grouting port adjacent to the grouting port where grouting is being performed, with the outlet of the bent pipe facing upward.
[0043] During construction, the dimensions of all windows in the drawings are summarized and calculated, the mold layout and planning are carried out, and the quantity and size of each type of material required are determined; the window sub-frame 1 is divided into the left and right side parts of the window sub-frame 1, the upper part of the window sub-frame 1 and the lower part of the window sub-frame 1; during installation, the left and right side parts of the window sub-frame 1 are installed first, then the upper part of the window sub-frame 1 is installed, and finally the lower part of the window sub-frame 1 is installed, and then the upper part of the window sub-frame 1 and the lower part of the window sub-frame 1 are placed on the top support part 9.
[0044] A construction method of a window sub-frame anti-leakage structure according to an embodiment of the present application is as follows: Figure 1-Figure 5As shown, the specific construction operation is as follows: in advance, the first fastener 3 is passed through the protective member 2 and inserted into the reserved hole on the second connecting member 4, and the second fasteners 6 are screwed on both ends of the first fastener 3, but not tightened, so that the second connecting member 4 remains loose;
[0045] Secondly, the window sub-frame 1 is temporarily fixed by means of a support block. This fixing method is conventional and will not be described in detail. A uniform gap is left between the window sub-frame 1 and the concrete structure 11. The two sides of the two first connecting members 5 are then placed close to the window sub-frame 1 and the concrete structure 11, leaving a gap of 4 to 5 cm between the ends of the first connecting members 5 and the corners of the window. Next, the pre-prepared, loose second connecting members 4 are clamped between the two first connecting members 5 and the window sub-frame 1. After adjusting the position, the second fasteners 6 at both ends are tightened.
[0046] Then, align the support part 9 with the middle position of the second connecting piece 4 that has been installed on the window sub-frame 1, and tighten it with the adjusting screw on the support part 9. Finally, install the grouting parts 8 on the four corners of the window sub-frame 1 in sequence, loosen the two second fasteners 6 installed at the corners of the window sub-frame 1, align the mounting groove 82 reserved on the grouting part 8 with the first fastener 3 for installation, install the grouting part 8 on the outside of the second connecting piece 4, and press the rubber strip 10 into the gap position where the corner of the grouting part 8 is connected to the concrete structure 11. After adjusting the position, re-tighten the second fastener 6 at the corner of the window sub-frame 1. At this point, the grouting mold is fully installed and ready to start injection. Grouting work; before grouting, first prepare the waterproof mortar 7, which is an existing grouting material and will not be described in detail; grouting starts from the lower left corner of the window sub-frame 1, and a grouting overflow piece 12 is installed on two adjacent grouting pieces 8, and the outlet of the grouting overflow piece 12 is kept facing upward. During the grouting process, if waterproof mortar 7 is found to overflow from one of the grouting overflow pieces 12, it is considered that the enclosed space between the two grouting ports is full, and the grouting port is sealed, and the grouting overflow piece 12 is installed on the next grouting port until all the grouting ports overflow with waterproof mortar 7. The grouting is completed, all grouting ports are sealed, and maintenance is carried out. After the demoulding conditions are met, the template is removed for the next window construction.
[0047] From the above description, it can be seen that the above-mentioned embodiments of the present application achieve the following technical effects: 1. It effectively solves the problems of difficult construction, easy leakage, and lack of quality assurance means in the conventional window sub-frame caulking process. Through standardized molds and grouting processes, the molding quality and density of the caulking are guaranteed, which greatly reduces the dependence on workers' skills and management.
[0048] 2. The mold can be reused and is easy to install, which has little impact on the construction cost. The reduced leakage repair costs in the later stage can reduce the overall cost.
[0049] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.
[0050] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. Technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, and therefore, once an item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.
[0051] In the description of this application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of this application; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.
[0052] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.
[0053] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.
[0054] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "provided with," "connected," etc., should be understood in a broad sense. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; it may refer to a mechanical connection or an electrical connection; it may refer to a direct connection or an indirect connection through an intermediate medium; it may refer to internal communication between two components. Those skilled in the art will be able to understand the specific meanings of the above terms in the present invention in specific circumstances.
[0055] The above description is only a preferred embodiment of the present invention. All equivalent changes and modifications made according to the scope of the patent application of the present invention should fall within the scope of the present invention.
Claims
1. A window sub-frame anti-leakage structure, characterized in that: It includes: The window subframe is connected to the concrete structure. a first connecting portion, wherein the window sub-frame is connected to the concrete structure via the first connecting portion, so that a closed space is formed between the window sub-frame and the concrete structure, and the closed space is filled with waterproof mortar; The first connecting portion includes a first connecting member, which is an L-shaped aluminum angle; the front and rear sides of the window sub-frame are respectively connected to the first connecting member, and the first connecting member is connected to the concrete structure, so that the first connecting member, the window sub-frame and the concrete structure together form a closed space; The first connecting part also includes a second connecting piece and a first fastener, the second connecting piece clamps the first connecting piece located on both sides of the window sub-frame, and the second connecting piece is located on the outside of the window sub-frame; the second connecting piece is a U-shaped clamp; the first fastener is passed through the second connecting piece, the bottom of the window sub-frame is connected to the first fastener, and the lower end of the first connecting piece is connected to the first fastener; the two ends of the first fastener are respectively located on the outside of the second connecting piece, and the two ends of the first fastener are respectively connected to the second fastener.
2. The window sub-frame anti-leakage structure according to claim 1, characterized in that: A protective piece is sleeved on the first fastener, and the length of the protective piece is consistent with the width of the window sub-frame.
3. The window sub-frame anti-leakage structure according to claim 1, characterized in that: It also includes a supporting portion, and the second connecting members located at relative positions of the window sub-frames are connected through the supporting portion.
4. The window sub-frame anti-leakage structure according to claim 3, characterized in that: The support portion includes a support rod, and support members for supporting the second connecting member are respectively formed at both ends of the support rod; and an adjusting screw is connected to the support member.
5. The window sub-frame anti-leakage structure according to claim 4, characterized in that: It also includes a grouting piece, which is connected to the second connecting piece. The grouting piece is provided with a grouting port, which is connected to the first connecting piece, the window sub-frame and the concrete body structure to form a regular closed space.
6. The window sub-frame anti-leakage structure according to claim 5, characterized in that: A rubber strip is connected between the grouting piece and the concrete structure.
7. The window sub-frame anti-leakage structure according to claim 5, characterized in that: It also includes a grouting overflow piece, which is detachably connected to the grouting port.
8. A construction method for the window sub-frame anti-leakage structure according to claim 7, characterized in that: The specific construction operation is as follows: in advance, insert the first fastener into the reserved hole on the second connecting member, and screw the second fasteners on both ends of the first fastener, but do not tighten them, so that the second connecting member remains loose; Secondly, temporarily fix the window sub-frame; Leave a uniform gap between the window sub-frame and the concrete structure, then place the two sides of the two first connecting pieces close to the window sub-frame and the concrete structure. Then, clamp the two first connecting pieces and the window sub-frame with the pre-prepared loose second connecting pieces. After adjusting the position, tighten the second fasteners at both ends. Then, align the support part with the middle position of the second connecting piece that has been installed on the window sub-frame, and tighten it with the adjusting screws on the support part. Finally, install the grouting parts on the four corners of the window sub-frame in sequence, align the reserved installation grooves on the grouting parts with the first fasteners and install them so that the grouting parts are installed on the outside of the second connecting piece. At this point, the grouting mold is fully installed and ready to start the grouting work. Grouting starts from the lower left side of the window sub-frame, and grouting overflow pieces are installed on the two adjacent grouting pieces, and the outlet of the grouting overflow piece is kept upward. If waterproof mortar is found to overflow from one of the grouting overflow pieces during the grouting process, the enclosed space between the two grouting ports is full. Seal the grouting port and install the grouting overflow piece on the next grouting port until waterproof mortar overflows from all the grouting ports. The grouting is completed, all the grouting ports are sealed, and maintenance is carried out. After the demolding conditions are met, the formwork is removed for the next window construction.
Citation Information
Patent Citations
Component for fixing window auxiliary frame
CN212507913U
Window frame mounting structure
CN212898112U
Residential window frame joint treatment device
CN217712217U
Anti-leakage structure of auxiliary window frame
CN219864664U