CN109403818B - Internal flat-open or external flat-open fireproof safety window device - Google Patents

Abstract

The invention relates to a fire safety window device with inner casement or outer casement, comprising a frame profile, a middle frame profile, and a transition middle frame profile. The frame profile comprises a frame body with a hollow structure and a frame body respectively arranged at one of the ends of the frame body. The wing plate part on the corner, the middle frame profile also includes the middle frame main body of the hollow structure and the wing plate parts respectively arranged on the end corners on both sides of the middle frame main body, and the conversion middle frame profile includes the hollow structure conversion middle frame main body and respectively. The glass abutting part and the window sash abutting part are arranged on the opposite corners of the main body of the conversion middle frame, and the opening directions of the glass abutting part and the window sash abutting part are arranged opposite to each other. This fire safety window can construct fire safety window products with most shapes and structures by using the unique structural design of frame profiles, middle frame profiles and conversion middle frame profiles, and the types of profiles required for building window products can be greatly improved. Reduced, more convenient to assemble, higher efficiency, lower cost, good sealing and anti-leakage performance.

Description

A fire safety window device with inner casement or outer casement

technical field

The invention relates to the technical field of metal windows, in particular to a fire safety window with inner casement or outer casement.

Background technique

Metal fire windows have been widely used in high-rise buildings and some high-end building projects because of their high structural strength, fire prevention and high safety. The current metal fireproof windows are mainly due to the unscientific and reasonable structural design of the profiles, so that they still have the following deficiencies in practical applications: First, the profiles used for assembling windows are not very versatile, which makes the construction of a window. There are too many types of profiles, and many production molds and equipment are required, which makes the production cost too high, the storage cost and the transportation cost are high. Moreover, due to the large number of models, the assembly and construction are not convenient enough, and the efficiency cannot be improved. Second, the drainage structure of the windows is poorly designed. In heavy rain, it is easy to seepage and overflow into the room, and the waterproof performance is poor. Third, the sealing structure is poorly designed, and the sound insulation and dust isolation performance are poor. Fourth, the glass and sash of the window must be carried out from the facade of the building using a lifting basket. The installation is difficult, the risk factor is high, and the glass installation efficiency is low. Moreover, when the glass of a certain window is damaged, it is also necessary to The facade of the building is replaced by a lifting basket, which is very inconvenient and the maintenance cost is high. In view of these deficiencies, it is very necessary to redesign and develop the profiles used in metal fire windows so that they can better meet the application needs of modern buildings.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above problems and deficiencies, and to provide a fire safety window device with inner casement or outer casement. A large number of fire safety window products with shapes and structures are constructed to meet the application needs of different buildings, and through the unique structural design of these three profiles, the types of profiles required for building window products are greatly reduced. It is more convenient, higher efficiency, lower cost, good sealing and anti-leakage performance, excellent sound insulation and dustproof effect, and the glass installation and window sash installation on the constructed window products are all carried out indoors, without external walls Hanging basket installation greatly improves the convenience and safety of window products installed on buildings.

The technical scheme of the present invention is realized as follows: a fire safety window device with inner casement or outer casement, which is characterized in that it includes a frame profile, a middle frame profile, and a transition middle frame profile, wherein the frame profile also includes a hollow structure. The frame body of the frame body and the wing plate part arranged on one of the end corners of the frame body body, between the wing plate part and the frame body body are also respectively formed with sealing strip installation grooves, outside the wing plate part of the frame body body. The end is also provided with an inwardly bent rubber strip limiting portion; the side of the frame body located below the wing plate portion is also provided with a first concave shallow groove, which corresponds to the frame body of the frame profile. There is also a second concave shallow groove on the other side of the first concave shallow groove; the frame profile is an integral structure formed by bending a steel sheet, and the two sides of the steel sheet are The closing opening of the frame body is arranged in the groove bottom of one of the first concave shallow groove and the second concave shallow groove of the frame body; the middle frame profile also includes a middle frame body with a hollow structure and a The wing parts on the end corners of the two sides of the middle frame main body are respectively formed with sealing rubber strip installation grooves between the two wing plate parts and the middle frame body, on the outer ends of the wing plate parts of the middle frame body There is also a rubber strip limit part that is bent inward; the two sides of the middle frame body are also provided with a first concave shallow groove and a second concave shallow groove; the middle frame profile is made of a steel An integral structure formed by bending a sheet, and the closures of the two sides of the steel sheet are arranged in one of the first concave shallow groove and the second concave shallow groove on both sides of the main frame of the middle frame. in the bottom of the groove; the conversion middle frame profile also includes a hollow structure conversion middle frame body and a glass abutting portion and a window sash abutting portion respectively disposed on the opposite corners of the conversion middle frame body, the glass abutting portion and the window sash abutting portions The opening directions of the leaning parts are opposite to each other; between the window sash abutting part and the main body of the conversion middle frame, a sealing rubber strip installation groove is respectively formed; There is also a rubber strip limit part bent inward; a first concave shallow groove is also provided on one of the side surfaces of the main body of the conversion middle frame; the middle conversion frame profile is formed by bending a steel sheet The integral structure of the steel sheet is arranged on the inner side of the other side of the main body of the conversion middle frame.

Beneficial effects of the present invention: the fire safety window can be constructed by using the unique structural design of the frame profile, the middle frame profile, and the conversion middle frame profile, and can construct an outer casement type fire safety window product, or an inner casement type fire safety window product, Fixed sash type fire safety window products, and can also build hybrid fire safety window products with outer casement sash, inner casement sash, and fixed sash. It is required by the application of buildings and has a wide range of applications; and through the unique structural design of these three profiles, each profile can be used multiple times in different positions of the same window product, so that the types of profiles required for building window products can be obtained. It is greatly reduced, it is more convenient to assemble, and the efficiency is higher, which effectively reduces the input of production molds and production equipment, and saves production costs, storage costs, and transportation costs; in addition, through the specially designed sealing strips on these three profiles The design of the installation groove, the limit part of the rubber strip, and the concave shallow groove makes the window products have the characteristics of good sealing, good anti-leakage performance, and excellent sound and dust isolation. The glass installation and window sash installation on the window products are all carried out indoors, and there is no need to install the outer wall hanging basket, which greatly improves the convenience and safety of the installation of the window products on the building, and the installation efficiency is high.

Description of drawings

1 is a schematic cross-sectional structural diagram of a hybrid window with an inner casement sash, a fixed sash, and a corner-fixed sash according to the present invention.

FIG. 2 is a schematic cross-sectional structure diagram of a hybrid window with an outer casement sash, a fixed sash, and a corner-fixed sash according to the present invention.

FIG. 3 is a partial enlarged structural schematic diagram of the part indicated by A in FIG. 1 of the present invention.

FIG. 4 is a partial enlarged structural schematic diagram of the part indicated by B in FIG. 1 of the present invention.

FIG. 5 is a partial enlarged structural schematic diagram of the part indicated by C in FIG. 1 of the present invention.

FIG. 6 is a partial enlarged structural schematic diagram of the part indicated by D in FIG. 1 of the present invention.

FIG. 7 is a partial enlarged structural schematic diagram of the part indicated by E in FIG. 1 of the present invention.

FIG. 8 is a partial enlarged structural schematic diagram of the part indicated by F in FIG. 1 of the present invention.

FIG. 9 is a partial enlarged structural schematic diagram of the part indicated by G in FIG. 2 of the present invention.

FIG. 10 is a partial enlarged structural schematic diagram of the part indicated by H in FIG. 2 of the present invention.

FIG. 11 is a partial enlarged structural schematic diagram of the part indicated by I in FIG. 2 of the present invention.

FIG. 12 is a schematic cross-sectional structure diagram of the frame profile of the present invention.

FIG. 13 is a schematic cross-sectional structure diagram of one of the extended solutions of the solution of FIG. 12 of the present invention.

FIG. 14 is a schematic cross-sectional structure diagram of the second extension scheme of the scheme of FIG. 12 of the present invention.

15 is a schematic cross-sectional structure diagram of the middle frame profile of the present invention.

FIG. 16 is a schematic cross-sectional structure diagram of the conversion middle frame profile of the present invention.

Detailed ways

As shown in Figures 1 and 2, a fire safety window device with inner casement or outer casement according to the present invention includes frame profiles 1, middle frame profiles 2, conversion middle frame profiles 3, glass 40, and window locks. and handle 50 and other components, the frame profile 1, the middle frame profile 2, and the conversion middle frame profile 3 are respectively made of steel, and the glass 40 is a high temperature resistant fireproof glass.

A complete window product generally also includes: a window frame body composed of frame profiles 1, an outer casement sash 60 composed of middle frame profiles 2 and glass 40, or, converted middle frame profiles 3, middle frame profiles 2 , a fixed fan 70 composed of glass 40; or, a fixed fan 70 composed of a frame profile 1 and glass 40; or, an extension scheme of the frame profile 1 (that is, as shown in Figure 13 or Figure 14), the frame profile 1, The corner fixed sash 80 formed by the glass 40 , or the inner casement window 90 formed by the conversion middle frame profile 3 and the glass 40 . These outer casement sashes 60 , fixed sashes 70 , corner fixed sashes 80 , and inner casement sashes 90 , in actual implementation, can be arbitrarily matched and combined according to actual needs. In this embodiment, due to space limitations, only the hybrid window with inner casement sash, fixed sash, and corner fixed sash shown in FIG. 1 is provided as one of the application examples, and the The hybrid window with the outer casement sash, the fixed sash, and the corner-fixed sash shown in the figure is another application example solution for those skilled in the art to understand the purpose of the present invention.

The following describes in detail the reason why the present invention can meet and assemble various forms of fire safety window products through very limited three unique profile structure designs in conjunction with the exemplary solutions provided in Figures 1 and 2 to meet practical application requirements. .

As shown in FIG. 12 , the frame profile 1 further includes a frame body 11 with a hollow structure and a wing plate portion 4 respectively disposed on one of the corners of the frame body 11 . A sealing rubber strip installation groove 5 is also formed therebetween, and the sealing rubber strip installation groove 5 is installed with a sealing rubber strip 51 . The outer end of the wing plate portion 4 of the frame main body 11 is also provided with an inwardly bent rubber strip limiting portion 6 , which mainly functions to limit the sealing rubber strip 51 to prevent the sealing rubber strip 51 from being assembled during the assembly process. squeezed out. A first concave shallow groove 7 is also provided on the side surface of the frame body 11 below the wing plate portion 4 thereof.

When the frame profile 1 is applied, as shown in FIG. 3 , it can be used as the window frame of the whole window product. Correspondingly, the sealing rubber strip 51 is installed to ensure the sealing performance after the inward opening flat window sash 90 and the frame profile 1 are closed. The hinge 100 is installed on the inner surface of the frame profile 1, and is connected and assembled with the inward opening flat window sash 90.

As shown in FIG. 8 , the frame profile 1 can also be used for the installation of the glass 40 of the fixed fan. At this time, its wing plate portion 4 is used as the abutment edge for the glass 40 to be fixed. Similarly, a sealing strip 51 is embedded between the wing plate portion 4 and the glass 40 to ensure the sealing and leakage prevention of the glass 40 installation. Performance: On the first concave shallow groove 7 of the frame profile 1, a fixed bead 52 is used to fix the glass 40 from the inner side of the glass 40, so that the fixed bead 52 and the wing plate 4 form a match for clamping the glass 40 structure. Similarly, the sealing strip 52 is also sandwiched between the fixing pressure strip 52 and the glass 40 to ensure the sealing and airtight performance. The fixed pressure strip 52 is also buckled with a pressure strip cover 53 for the purpose of concealing the ugly.

As shown in FIG. 12 , the frame main body 11 of the frame profile 1 is further provided with a second concave shallow groove 8 on the other side surface corresponding to the first concave shallow groove 7 thereon. Wherein, the first concave shallow groove 7 is generally used for the concealment of the window lock between the window sash and the window frame, so as to reduce the gap between the window sash and the window frame and provide the airtightness of the window. In addition, the first concave shallow groove 7 can also be used as a drainage channel to prevent the leaked rainwater from flowing into the room when the sealing rubber strip 51 is aged. The second concave shallow groove 8 is mainly used for fixed connection with the wall, so that the frame profile 1 can be better engaged with the wall and be more easily fixed. Also as shown in FIG. 12 , the frame body 11 is formed by bending a steel sheet, the entire frame profile 1 is an integral structure, and the closing openings 30 on both sides of the steel sheet are arranged on the side of the frame body 11 . in the bottom of one of the first concave shallow groove 7 and the second concave shallow groove 8 .

On the basis of the solution structure shown in FIG. 12 , in order to better meet the application needs of some special occasions, such as the application of the corner position of the corner fixed fan 80 in FIG. 1 , the present invention extends the solution shown in FIG. 13 , Different from the solution shown in FIG. 12 , the frame body 11 of the frame profile 1 is further provided with a second wing plate portion 20 , and the outer end of the second wing plate portion 20 is also provided with a rubber strip limiting portion 6 . . After the second wing plate portion 20 and the rubber strip limiting portion 6 thereon are added, the frame profile 1 of this extension scheme is generally called a corner profile. As shown in FIG. 7 , the second wing plate part 20 is also used for abutting installation of the glass 40 . The assembly method and principle of the glass 40 and the second wing plate part 20 are basically inconsistent with the assembly method and principle in FIG. 8 . Do not repeat. The assembly method and principle of the inner casement window 90 and the hinge 100 are also basically the same as those of the solution shown in FIG. 3 , and will not be repeated here. As shown in FIG. 13 , the frame profile 1 of this extension scheme is also formed by bending a steel sheet, and the closing openings 30 on both sides of the steel sheet are arranged on one side of the frame body 11 . The solution structure shown in FIG. 13 is generally only suitable for corner applications of hybrid window products with inner casement sash 90 and corner fixed sash 80 , as shown in FIG. 1 .

As shown in FIG. 14 , on the basis of the solution structure shown in FIG. 12 , the frame profile 1 can also extend another special application solution. The difference between this solution and the solution shown in FIG. 13 is that the second wing plate portion 20 The setting positions are different. The second wing plate portion 20 of the solution shown in FIG. 13 and the wing plate portion 4 on the frame profile 1 are arranged diagonally, while the second wing plate portion 20 of the solution shown in FIG. 14 and the frame profile 1 are arranged diagonally. The upper wing plate portion 4 is arranged on the same side, and the second wing plate portion 20 of the scheme shown in FIG. 14 is also provided with a rubber strip limit portion 6, and the function of the rubber strip limit portion 6 is the same as that described above. . The solution shown in FIG. 14 is also called a corner profile, which is different from the solution shown in FIG. 13 in that the corner profile of the solution shown in FIG. 14 can only be applied to the corner position application of the outer casement window 60 and the corner fixed fan 80, That is, as shown in FIG. 2 and FIG. 11 . The scheme shown in FIG. 14 and the assembly method and principle of the glass 40, as well as the assembly connection method between the outer casement sash 60, the hinge 100 and the profiles of the scheme shown in FIG. 14 are basically the same as those shown in FIG. 7, except for the orientation There is a slight difference, one is installed on the inside and the other is installed on the outside, and the description will not be repeated here. The frame profile 1 of the extension scheme shown in FIG. 14 is also formed by bending a steel sheet, and the closing openings 30 on both sides of the steel sheet are arranged on one side of the frame body 11 .

As shown in FIG. 15 , the middle frame profile 2 includes a middle frame main body 21 with a hollow structure and wing parts 4 respectively disposed on both side end corners of the middle frame body 21 . Between the frame main bodies 21 are respectively formed sealant strip installation grooves 5, the sealant strip installation grooves 5 are used to install the sealant strips 51, and on the outer end of the wing plate portion 4 of the middle frame main body 21 is also provided The rubber strip limiting portion 6 that is bent inside, the rubber strip limiting portion 6 mainly plays a role in limiting the sealing rubber strip 51 to prevent the sealing rubber strip 51 from being squeezed out during the assembly process. A first concave shallow groove 7 and a second concave shallow groove 8 are respectively provided on both sides of the middle frame main body 21 .

As shown in FIG. 1 and FIG. 4 , the middle frame profile 2 can be used as the center column of two inner casement window sashes 90 in one window product. At this time, the wing parts 4 on the end corners of the two sides of the middle frame main body 21 are used as the abutting parts of the inner casement sash 90, and the sealing rubber strip 51 is installed with the sealing rubber strip 51, so that the inner casement window sash is installed with the sealing rubber strip 51. When the 90 is closed, it has better sealing and airtight performance, and realizes the effects of dustproof, anti-leakage and sound insulation. At this time, the first concave shallow groove 7 and the second concave shallow groove 8 can be used as a lock seat, a lock component, etc. when a window lock is installed between the inner casement window 90 and the middle frame profile 2. In order to reduce the gap between the inner casement window sash 90 and the middle frame profile 2, the sealing performance, the beauty and the grade of the whole window are improved.

As shown in FIG. 1 and FIG. 5 , the middle frame profile 2 can also be used in a window product as a center pillar between two pieces of glass 40 for assembling a fixed fan. At this time, the wing parts 4 on the end corners of the two sides of the middle frame main body 21 are used as the abutment edges for the fixed installation of the glass 40, and the sealing rubber strip 51 is installed in the sealing strip installation groove 5 to ensure the glass 40 and the wing plate. The air tightness of the assembly between the parts 4 can achieve the purpose of dustproof, anti-leakage and sound insulation. At this time, the first concave shallow groove 7 and the second concave shallow groove 8 are used for fixing the installation position of the pressure bar 52 . The installation method and principle of the fixed pressure strip 52 , the pressure strip cover 53 , and the sealing rubber strip 51 here are basically the same as the installation method and principle in FIG. 8 above, and will not be described repeatedly here.

As shown in Figures 1 and 6, the middle frame profile 2 can also be used in a window product as a central column between the glass 40 and the inner casement sash 90. The assembly method and principle here are shown in Figures 4 and 4. Fig. 5 is a mixed embodiment of the assembly structure and principle in the scheme of Fig. 6, and the description is not repeated here.

As shown in FIG. 2 , FIG. 9 and FIG. 11 , the middle frame profile 2 can also be used as the sash frame of the outer casement window sash 60 in a window product. At this time, the sash frame of the outer casement window 60 is enclosed by four middle frame profiles 2, the glass 40 is sandwiched between the fixed pressure strip 52 and the wing plate 4 located at the inner side, and the sealing strip 51 corresponds to It is sandwiched between the wing plate part 4 and the glass 40 and between the glass 40 and the fixed bead 52 so as to play the role of air tightness. The wing plate portion 4 located outside the sash frame is used as a connection and assembly with the frame profile 1 of the window frame through a hinge 100, as shown in FIG. 9 . Alternatively, as shown in FIG. 10 , the wing plate portion 4 outside the frame of the fan is used for abutting engagement with the frame of the fixed fan. A window lock and a handle 50 can be installed on the inner side of the middle frame profile 2 of the outer casement window 60 .

Through the specific application examples of Fig. 1, Fig. 2, Fig. 4, Fig. 5, Fig. 6, Fig. 9, Fig. 10, Fig. 10, it can be found that a middle frame profile 2 can be used repeatedly in different positions of different window products , the versatility is very strong, and it is very easy to adapt, which greatly reduces the types and specifications of a window product, the required profiles, saves the cost of all aspects of the production enterprise, improves the product market competitiveness, and also makes the window The assembly efficiency is greatly improved, and the construction time of the window is saved.

Also as shown in FIG. 15 , the middle frame profile 2 is also formed by bending a steel sheet, and the closing openings 30 on both sides of the steel sheet are arranged on the first concave shallow grooves on both sides of the middle frame main body 21 . 7 and one of the second concave shallow grooves 8 in the groove bottom.

As shown in FIG. 16 , the conversion middle frame profile 3 includes a conversion middle frame main body 31 with a hollow structure and a glass abutting portion 9 and a window sash abutting portion 10 respectively disposed on the opposite corners of the conversion middle frame body 31 . The opening directions of the abutting portion 9 and the window sash abutting portion 10 are opposite to each other. Between the window sash abutting portion 13 and the conversion middle frame main body 31 , a sealing rubber strip mounting groove 5 is respectively formed. The outer ends of the glass abutting portion 12 and the window sash abutting portion 10 are further provided with inwardly bent rubber strip limiting portions 6 respectively. A first concave shallow groove 7 is also provided on one side surface of the main body 31 of the conversion middle frame. Similarly, the conversion middle frame profile 3 is also formed by bending a steel sheet, and the two sides of the steel sheet are closed on the inner side of the other side of the conversion middle frame main body 31 .

As shown in FIG. 1 and FIG. 3 , FIG. 6 , and FIG. 7 , the converted middle frame profile 3 can be used as the sash frame of the inner casement window sash 90 in a window product. At this time, the sash frame of the inner casement window 90 is enclosed by four transition middle frame profiles 3, the glass abutting portion 9 of the transition middle frame profile 3 is located inside the sash frame, and the glass 40 is installed on the glass abutting portion. 9, and is clamped and installed by the fixing pressure strip 52. The clamping and sealing fixing method of the glass 40 is the same as that described above, and the detailed description is not repeated here. The window sash abutting part 10 of the converted middle frame profile 3 is used as a sealing abutting part with the frame frame 1 of the window frame, or as a mounting and connecting part with the hinge 100, as shown in Figures 3 and 7 . Alternatively, the window sash abutting portion 10 of the converted middle frame profile 3 is used as a position that is sealed and abutted against the central pillar of the window, as shown in FIG. 4 . The window lock and handle 50 of the inner casement window 90 are installed on the inner side surface of the conversion middle frame profile 3 . The functions played by the first concave shallow grooves 7 are basically the same as those played by the first concave shallow grooves 7 on the front middle frame profile 2 and the frame profile 1 .

As shown in FIGS. 2 and 10 , the converted middle frame profile 3 can be used in a window product as a center column of a window with an outer casement 60 . At this time, the converted middle frame profile 3 is used as the central column between the fixed sash 70 of the window and the outer casement sash 60, and the glass abutting portion 9 on the converted middle frame profile 3 is used to clamp the glass 40 together with the fixed clip 52. , construct the fixed sash 70; convert the sash abutting portion 10 on the middle frame profile 3 for the outer casement sash 60 to abut against when it is closed, or to install the hinge 100, etc.

Through the specific application examples of Fig. 1, Fig. 2, Fig. 3, Fig. 6, Fig. 7, Fig. 10, it can be found that a converted middle frame profile 3 can be used repeatedly in different positions of different window products, and the versatility It is very strong and easy to adapt, which greatly reduces the types and specifications of a window product, the required profiles, saves the cost of all aspects of the production enterprise, improves the market competitiveness of the product, and also improves the assembly efficiency of the window. Greatly improved, saving the construction time of windows.

12, 15, and 16, the unique structural design of the profiles, so that the present invention can construct both an outer casement type fire safety window product, an inner casement type fire safety window product, and a fixed sash type fire safety window product. , It can also build a hybrid fire safety window product with an outer casement window sash, an inner casement window sash, and a fixed sash, and can fully build a large part of the shape and structure of the window products to meet the application needs of different buildings. Moreover, as shown in FIG. 1 and FIG. 2 , the fixed bead 52 and the glass 4 are installed and fixed from the indoor direction, without the need for hanging basket installation on the outer wall, which greatly improves the convenience and safety of the installation of window products on buildings sex.

Claims (1)

1. The utility model provides an interior flat-open or fire safety window device of outer flat-open which characterized in that: comprises a frame section bar (1), a middle frame section bar (2) and a conversion middle frame section bar (3), wherein

The frame section bar (1) comprises a frame main body (11) with a hollow structure and a wing plate part (4) arranged on one end corner of the frame main body (11), sealing rubber strip mounting grooves (5) are formed between the wing plate part (4) and the frame main body (11) respectively, and an inward-bent rubber strip limiting part (6) is arranged on the outer end of the wing plate part (4) of the frame main body (11); a first shallow concave groove (7) is further formed in the side face, located below the wing plate portion (4), of the frame main body (11), and a second shallow concave groove (8) is further formed in the other side face, corresponding to the first shallow concave groove (7) in the frame main body (11) of the frame profile (1); the frame section bar (1) is of an integral structure formed by bending a steel sheet, and the closing-in of two side edges of the steel sheet is arranged in the groove bottom of one of a first concave shallow groove (7) and a second concave shallow groove (8) of a frame main body (11);

the middle frame section (2) comprises a middle frame main body (21) with a hollow structure and wing plate parts (4) respectively arranged on the end corners of two sides of the middle frame main body (21), sealing rubber strip installation grooves (5) are respectively formed between the two wing plate parts (4) and the middle frame main body (21), and an inward bent rubber strip limiting part (6) is further arranged on the outer end of the wing plate part (4) of the middle frame main body (21); the side surfaces of two sides of the middle frame main body (21) are respectively provided with a first concave shallow groove (7) and a second concave shallow groove (8); the middle frame section (2) is of an integral structure formed by bending a steel sheet, and the closing-in of two side edges of the steel sheet is arranged in the bottom of one of a first concave shallow groove (7) and a second concave shallow groove (8) on two sides of the middle frame main body (21);

the conversion middle frame section bar (3) comprises a conversion middle frame main body (31) with a hollow structure, and a glass abutting part (9) and a window sash abutting part (10) which are respectively arranged on the diagonal corners of the conversion middle frame main body (31), wherein the opening directions of the glass abutting part (9) and the window sash abutting part (10) are opposite to each other; sealing rubber strip mounting grooves (5) are formed between the window sash abutting part (13) and the conversion middle frame main body (31); the outer ends of the glass abutting part (12) and the sash abutting part (10) are respectively provided with an inward bent rubber strip limiting part (6); a first shallow concave groove (7) is further formed in one side face of the conversion middle frame main body (31); the conversion middle frame section (3) is of an integral structure formed by bending a steel sheet, and the closing-in of two side edges of the steel sheet is arranged on the inner side surface of the other side surface of the conversion middle frame main body (31).

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