Built-in screw joint structure of mullion of plastic-steel door and window

Abstract

The utility model discloses a plastic-steel door and window mullion built-in screw joint structure which comprises a window frame, a mullion is arranged on the window frame, lining steel is arranged in the window frame and the mullion, the window frame and the mullion are connected with an installation block, the installation block is located in the mullion, and the plastic-steel door and window mullion built-in screw joint structure is reliable in connection strength, high in attractiveness and simple in structure.

Description

Technical Field

[0001] The utility model belongs to the technical field of the connection of the middle mullion of doors and windows. Specifically, the utility model relates to an internal screw connection structure of the middle mullion of plastic-steel doors and windows. Background Art

[0002] Currently, the middle mullion part of plastic doors and windows is basically formed by welding the middle mullion profile and the frame profile. In this way, the steel liners of the middle mullion profile and the window frame profile are disconnected and cannot be effectively rigidly connected. In the actual use process of plastic doors and windows, the middle mullion part is exactly the place where the load is relatively large and the stress is relatively concentrated. If the connection strength is insufficient or other reasons, it is very easy to cause phenomena such as middle mullion deformation and corner cracking. And currently, most of the middle mullion connectors are externally arranged, which is not convenient for connection and the aesthetics of the doors and windows is poor.

[0003] The utility model patent with the publication number of CN211448305U discloses a post-installed middle mullion connector and a middle mullion connection structure with the name on September 8, 2020. The connector includes a connector body, which includes a plug-in part and a clamping part. The plug-in part is located above the clamping part. The connector body is composed of a second connecting part and a first connecting part arranged left and right. A threaded hole is provided in the upper part of the plug-in part of the first connecting part; the plug-in part of the second connecting part is movably connected with the plug-in part of the first connecting part, and the bottoms of the first connecting part and the second connecting part are both free ends; circular arc-shaped holes penetrating through front and back are provided in the lower parts of the plug-in parts of the first connecting part and the second connecting part. The structure of this connector is complex and the use cost is high. Content of the Utility Model

[0004] The purpose of the utility model is to provide an internal screw connection structure of the middle mullion of plastic-steel doors and windows with reliable connection strength, high aesthetics and simple structure in view of the deficiencies of the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] The internal screw connection structure of the middle mullion of the plastic-steel doors and windows includes a window frame, the middle mullion is arranged on the window frame, steel liners are arranged inside the window frame and the middle mullion, and an installation block is connected between the window frame and the middle mullion, and the installation block is located inside the middle mullion.

[0007] A first screw is provided on the window frame, an opening is provided on the side of the installation block, a nut is arranged in the opening, a first connection hole is provided at the bottom of the installation block, and the first screw passes through the first connection hole and cooperates with the nut.

[0008] A second connection hole is provided on the installation block, second screws are provided on both sides of the middle mullion, and the second screws pass through the middle mullion and are connected with the second connection hole.

[0009] The first screw is arranged parallel to the middle mullion, and the second screw is arranged perpendicular to the middle mullion.

[0010] One end of the mounting block is provided with a boss, the boss contacts the window frame, the size of the boss is larger than that of the mounting block, and both the opening and the first connection hole are arranged on the boss.

[0011] The mounting block is adapted to the lining steel inside the middle mullion.

[0012] The cross-section of the mounting block is a square structure.

[0013] The technical effect of the present utility model is as follows: By adopting the built-in screw connection structure of the middle mullion of the plastic-steel door and window of the present utility model, the mounting block realizes the connection between the window frame and the middle mullion, replacing the welding method in the traditional technology. It can firmly connect the lining steel of the middle mullion and the window frame together, effectively improving the overall strength of the middle mullion part, and being able to reduce or avoid phenomena such as deformation and cracking of the middle mullion part. The mounting block is arranged inside the middle mullion, achieving a hidden effect and having a beautiful effect on the door and window; moreover, the mounting block has a simple structure, low cost, few connecting parts, and is convenient for installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] This specification includes the following drawings, and the shown contents are respectively:

[0015] Figure 1 is an exploded structural schematic diagram of the built-in screw connection structure of the middle mullion of the plastic-steel door and window of the present utility model;

[0016] Figure 2 is a structural schematic diagram of the mounting block of the present utility model.

[0017] The marks in the figure are: 1, window frame; 2, middle mullion; 3, mounting block; 4, lining steel; 5, first screw; 6, second screw; 7, first connection hole; 8, second connection hole; 9, opening; 10, nut; 11, boss. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The following will, with reference to the drawings, further describe in detail the specific embodiments of the present utility model through the description of the embodiments, aiming to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention, and contribute to its implementation.

[0019] As Figure 1 and Figure 2 shown, the built-in screw connection structure of the middle mullion of the plastic-steel door and window includes a window frame 1, a middle mullion 2 is arranged on the window frame 1, lining steels 4 are arranged inside both the window frame 1 and the middle mullion 2, a mounting block 3 is connected between the window frame 1 and the middle mullion 2, and the mounting block 3 is located inside the middle mullion 2.

[0020] The steel lining 4 is adapted to the inner holes of the profiles of the window frame 1 and the mullion 2, and is used to improve the strength of the window frame 1 and the mullion 2. The mounting block 3 realizes the connection of the steel lining 4 of the window frame 1 and the mullion 2. Compared with the welding connection method in the prior art, it achieves an effective rigid connection, thereby improving the connection strength, that is, ensuring reliable connection strength at the places where the mullion 2 has a large load-bearing capacity and stress concentration, and avoiding the situation of deformation and corner cracking of the mullion 2. Since the mullion 2 is a hollow structure and the mounting block 3 is arranged inside the mullion 2, it will not occupy the installation space of the mullion 2 or the window frame 1 after being connected and fixed. Since the mounting block 3 is hidden inside the mullion 2, the overall aesthetic effect of the doors and windows can be improved.

[0021] As Figure 2 shown, the window frame 1 is provided with a first screw 5, the side of the mounting block 3 is provided with an opening 9, a nut 10 is arranged in the opening 9, the bottom of the mounting block 3 is provided with a first connection hole 7, and the first screw 5 passes through the first connection hole 7 and cooperates with the nut 10. The opening 9 is communicated with the first connection hole 7. The opening 9 is used to place the nut 10 and stabilize its position, which can reduce the processing cost of tapping threads on the mounting block 3. The position of the opening 9 is adapted to the first connection hole 7, and the nut 10 provides a connection position for the first screw 5. The first screw 5 passes through the steel lining 4 of the window frame 1 and is connected to the mounting block 3, realizing the connection between the window frame 1 and the mounting block 3 in the longitudinal direction. The pressing part of the first screw 5 is located outside the window frame 1, and its position is convenient for the operator to turn.

[0022] As Figure 2 shown, the mounting block 3 is provided with a second connection hole 8, and both sides of the mullion 2 are provided with second screws 6. The second screws 6 pass through the mullion 2 and are connected to the second connection hole 8. The above structure realizes the connection between the mullion 2 and the mounting block 3 in the horizontal direction. There are two second screws 6 and they are respectively connected and fixed to both sides of the mounting block 3. The second screws 6 pass through the steel lining 4 of the mullion 2 and are connected to the mounting block 3, realizing a reliable connection between the mullion 2 and the mounting block 3. The pressing parts of the second screws 6 are located outside the mullion 2, and their positions are convenient for the operator to turn.

[0023] As Figure 1 shown, the first screw 5 is arranged parallel to the mullion 2, and the second screw 6 is arranged perpendicular to the mullion 2. In the above structure, the first screw 5 connects the window frame 1 and the mounting block 3, and its direction is vertically arranged. The second screw 6 connects the mullion 2 and the mounting block 3, and its direction is horizontally arranged. Through the combined connection effect of the first screw 5 and the second screw 6, a comprehensive restraint effect on the mounting block 3 is achieved, and then a reliable fixation of the window frame 1, the mullion 2 and the mounting block 3 is formed.

[0024] As Figure 2As shown in the figure, one end of the mounting block 3 is provided with a boss 11. The boss 11 contacts the window frame 1. The size of the boss 11 is larger than that of the mounting block 3. The opening 9 and the first connection hole 7 are both provided on the boss 11. The lining steel 4 located inside the mullion 2 is shorter than the length of the mullion 2, providing space for the installation of the mounting block 3. One end of the mounting block 3 has a relatively small size and extends into the interior of the lining steel 4. The setting of the boss 11 enlarges the size of one end of the mounting block 3, and its size is adapted to that of the lining steel 4. The sum of the length of the boss 11 and the length of the lining steel 4 is equal to the length of the mullion 2. Such a design will not reduce the structural strength of the mullion 2 caused by the lining steel 4 being shorter than the mullion 2, ensuring the reliability of the connection strength.

[0025] As Figure 1 shown, the mounting block 3 is adapted to the lining steel 4 inside the mullion 2. The mounting block 3 is adapted to the hollow cross-section size of the lining steel 4 inside the mullion 2. Such a design enables the four surfaces of the mounting block 3 to contact the inner side of the mullion 2, initially stabilizing the position of the mounting block 3 and facilitating alignment with the holes during subsequent screw connection.

[0026] As Figure 2 shown, the cross-section of the mounting block 3 is a square structure. Using a square structure is convenient for processing, reduces costs, has good adaptability, and can meet the connection requirements of most window frames 1 and mullions 2.

[0027] The screwing process of the mullion 2 is as follows:

[0028] 1. According to the size of the finished window in the design cutting list, determine the installation position of the window mullion 2, and make installation marks at the mating part of the frame and the mounting block 3. The size of the mounting block 3 should match the profile outer dimension, and the surface should be treated with anti-corrosion. Check the assembly gap between the mounting block 3 and the end of the mullion 2. It is appropriate that the two walls of the mounting block 3 are clamped with the two walls of the glass groove of the mullion 2 without any mating gap.

[0029] 2. Use self-tapping and self-drilling screws to fix the mounting block 3 on the lining steel 4 of the mullion 2. After fixing, the connecting piece should be firm without any shaking phenomenon. According to the positioning mark of the mullion 2, find the installation position of the mullion 2 and accurately align it. The allowable deviation shall not be greater than 0.5 mm. Then fix the mounting block 3 on the mullion 2.

[0030] 3. When the mounting block 3 is fixed, it should be reliably connected to the lining steel 4. Use self-drilling and self-tapping screws to ensure the strength of the mounting block 3. The bottom of the window frame 1 needs to be fastened with M8 screws to the connecting piece. When the mullion 2 is screwed, to ensure the sealing performance of the window, the upper and lower ends of the mounting block 3 are treated with rubber pads or coated with sealant. After the screwing process of the mullion 2 is completed, sealant needs to be applied at the screwed joint to ensure the sealing effect after screwing.

[0031] The built-in screw connection structure in the middle stile of the plastic-steel door and window realizes the connection between the window frame 1 and the middle stile 2 through the installation block 3, replacing the welding method in the traditional technology. It can firmly connect the lining steel 4 of the middle stile 2 and the window frame 1 together, effectively improving the overall strength of the middle stile 2 part and reducing or avoiding phenomena such as deformation and cracking of the middle stile 2 part. The installation block 3 is arranged inside the middle stile 2, achieving a hidden effect and having an aesthetic effect on the door and window; moreover, the installation block 3 has a simple structure, low cost, few connectors, and is convenient to install.

[0032] The above has described the present utility model by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present utility model; or without improvement, the above concept and technical solution of the present utility model are directly applied to other occasions, they are all within the protection scope of the present utility model.

Claims

1. An internal screw connection structure in the middle mullion of a plastic-steel door and window, comprising a window frame (1), and the middle mullion (2) is arranged on the window frame (1), characterized in that: Both the window frame (1) and the mullion (2) are internally provided with steel linings (4). The window frame (1) and the mullion (2) are connected with mounting blocks (3), and the mounting blocks (3) are located inside the mullion (2). A first screw (5) is provided on the window frame (1). An opening (9) is provided on the side of the mounting block (3), and a nut (10) is provided in the opening (9). A first connection hole (7) is provided at the bottom of the mounting block (3). The first screw (5) passes through the first connection hole (7) and cooperates with the nut (10).

2. The built-in screw connection structure in the middle stile of the plastic-steel door and window according to claim 1, characterized in that: A second connection hole (8) is provided on the mounting block (3). Second screws (6) are provided on both sides of the mullion (2). The second screws (6) pass through the mullion (2) and are connected to the second connection hole (8).

3. The built-in screw connection structure in the middle stile of the plastic-steel door and window according to claim 2, characterized in that: The first screw (5) is arranged parallel to the mullion (2), and the second screw (6) is arranged perpendicular to the mullion (2).

4. The built-in screw connection structure in the middle stile of the plastic-steel door and window according to any one of claims 1-3, characterized in that: One end of the mounting block (3) is provided with a boss (11). The boss (11) contacts the window frame (1). The size of the boss (11) is larger than that of the mounting block (3). The opening (9) and the first connection hole (7) are both provided on the boss (11).

5. The built-in screw connection structure in the middle stile of the plastic-steel door and window according to claim 3, characterized in that: The mounting block (3) is adapted to the steel lining (4) inside the mullion (2).

6. The built-in screw connection structure in the middle stile of the plastic-steel door and window according to claim 5, characterized in that: The cross-section of the mounting block (3) is a square structure.

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