KR102655569B1 - Structure of the lower frame of the window frame to improve airtightness and windowproof function and prevent the inflow of foreign substances - Google Patents

Abstract

In the present invention, a windbreak plate is additionally installed to improve airtightness at the bottom of the rail plate that is coupled to the lower frame of the window frame to prevent the inside of the lower frame from being exposed to the outside, and the rail plate is placed on the upper part of the windbreak plate combined with the lower frame. By combining it with the lower frame to double close the open part of the lower frame, it prevents wind, noise, dust and foreign matter from entering the room through the lower frame of the window frame, while improving airtightness and windproof function and allowing smooth drainage. This is to provide a window frame lower frame structure to prevent inflow.

Description

{Structure of the lower frame of the window frame to improve airtightness and windowproof function and prevent the inflow of foreign substances}

The present invention relates to a window frame lower frame, and more specifically, by additionally installing a windbreaker to improve airtightness at the bottom of the rail plate that is coupled to the window frame lower frame to prevent the inside of the lower frame from being exposed. It relates to a window frame lower frame structure that can block wind, noise, dust, and foreign substances from entering the room, improves airtightness and windproof function, and prevents the inflow of foreign substances.

Recently, as social interest in environmental pollution has increased, we have become very sensitive to fine dust and pollutants in the air. Even if the windows are closed, such polluted air passes through the structural problems of the window frame and the gap between the window and the window frame. is introduced indoors. In addition, non-sealed windows are structurally vulnerable to airtightness because the window is placed on the rail of the window frame and opens and closes by sliding on the rail, so wind, noise, dust, and foreign substances are inevitably introduced into the room through the window frame. .

The energy efficiency rating system, which was implemented in the past for home appliances and automobiles, is now also applied to windows. As it has been discovered that about 40% of a building's energy leaks through windows, the airtightness of windows must be maintained in order to increase the energy efficiency rating of buildings. Improving structure has become a very important item.

In the case of a window frame with a structure in which rail plates are combined so that the inside of the lower frame is not exposed to the outside in the lower frame of a non-sleeping window, both sides or one side of the plate-shaped rail plate and the lower frame are connected along the longitudinal direction of the frame. Since a gap must be formed between the side walls of the window frame to insert guide wings that protrude from the bottom of the window frame and guide the movement of the window, a gap at a certain distance is inevitably formed between the rail plate and the side wall of the lower frame. Therefore, even if mohair or gaskets are fastened to the gap, there is a problem that wind, noise, dust, and foreign substances from the outside enter the room through the spaced gap.

The applicant (inventor) of the present invention has spent a lot of time and money on research and development to solve the above-mentioned vulnerabilities and problems of window frames while working directly in the window field for decades, and has acquired dozens of domestic and foreign patents. It has been commercialized and has received a lot of favorable reviews, especially in terms of improved airtightness and windproof function and drainage, Patent registration No. 1753037 "Drainage structure of a window frame with airtightness and windproof function", Patent registration No. 1769578 "Equipped with a detachable lower frame and “Drainage structure of a window frame with airtightness and windproof functions”, Patent registration No. 2058920 “Insulation structure of a concealed plate installed on a rail-concealed window”, Patent registration No. 2064578 “Provides smooth drainage of the window frame while also blocking drafts. We have developed and are directly constructing many technologies, such as "windproofing and drainage structures," and are still investing a lot of money and time in developing technologies to solve problems related to windows. Through this series of processes, we have arrived at the present invention.

The present invention was created to solve the above problems, and the purpose of the present invention is to form a plate-shaped plate to improve airtightness at the bottom of the rail plate that is coupled to the window frame lower frame to prevent the inside of the lower frame from being exposed to the outside. ) of the windbreak plate is additionally installed, and the rail plate is joined to the upper part of the windbreak plate combined with the lower frame to double close the open part of the lower frame, thereby eliminating wind, noise, dust and foreign matter through the window frame lower frame. The purpose is to provide a window frame lower frame structure to improve airtightness and windproof function and prevent foreign substances from entering the room while preventing water from entering the room while allowing smooth drainage.

The window frame lower frame structure for improving airtightness and windproof function and preventing the inflow of foreign substances according to the present invention has a partition wall partitioning the indoor side and the outdoor side installed between the indoor side wall and the outdoor side wall, and between the indoor side wall and the partition wall and the outdoor side wall. A frame body consisting of a pair of supports protruding between the wall and the bulkhead: a plate-shaped plate, a lower and upper joint portion protruding from the lower and upper surfaces of the plate, and both ends of the plate in the longitudinal direction. It is composed of a drain hole formed in the (two sides) portion, and the lower coupling part is installed in conjunction with a support provided in the frame body, so that the plate closes the open upper part of the frame body between the indoor side wall and the outdoor side wall and partition. board; It is provided with a top plate with a rail protruding along the longitudinal direction at the center of the upper surface of the plate, and a support joint formed protruding on the lower surface of the top plate, and both side ends or one end of the top plate are bent downward along the longitudinal direction. The mohair fastening part is formed on the outer surface of the bent portion, and the support coupling part is installed in conjunction with the upper coupling part of the windshield plate.

Preferably, the windbreak plate is installed between the indoor side wall and the partition wall.

Preferably, a film is further installed on the bottom of the plate of the windbreaker to block the drain hole and then open in only one direction.

Preferably, an injection-molded product is further installed on the lower surface of the plate of the windshield plate at the portion where the drainage hole is formed, and the injection-molded product includes: a plate-shaped plate with a first drain hole formed thereon; A lower body formed in a hexahedral shape with a flat plate as its upper surface and located at the lower part of the flat plate, and having a second drain hole formed on the lower surface of the hexahedral shape or on the side located in the longitudinal direction; It is configured to include a film that is installed on the lower part of the flat plate to block and close the first drain hole and then opens the first drain hole in only one direction.

Preferably, instead of forming a drain hole in the windshield, an injection-molded product having first and second drain holes is installed at both longitudinal ends of the windshield, and the injection-molded product is plate-shaped and the first A flat plate on which drainage holes are formed; A lower body formed in a hexahedral shape with a flat plate as its upper surface and located at the lower part of the flat plate, and having a second drain hole formed on the lower surface of the hexahedral shape or on the side located in the longitudinal direction; A film installed on the lower part of the flat plate to block and close the first drain hole and then open the first drain hole in only one direction; the width of the flat plate is the same as the width of the plate of the windshield, and the lower body is It is installed to be located between a pair of supports installed on the frame body.

Preferably, instead of forming a drain hole in the windshield, an injection molded product having a first drain hole is installed at both ends of the windshield in the longitudinal direction, and the injection molded product is plate-shaped and has a first drain hole. A flat plate formed with a pair of flat plate supports protruding from the lower portion of the plate along the longitudinal direction; A film installed on the lower part of the flat plate to block and close the first drainage hole and then open the first drainage hole in only one direction, wherein the width of the flat plate is the same as the width of the plate of the windshield, and the flat plate support is installed in combination with a pair of supports installed on the frame body.

Preferably, the windbreak plates are installed separately along the longitudinal direction, and the injection molded product is installed between the separately installed windbreak plates.

Preferably, both sides or one side located in the longitudinal direction of the lower body are open, and the open side functions as a second drain hole.

Preferably, the rail plate includes a top plate with a rail protruding along the longitudinal direction at the center of the top surface of the plate, and both side ends of the top plate are bent downward along the longitudinal direction, respectively, so that the outside of the bent portion is formed. Mohair fastening parts are formed on each side, and the upper coupling part of the windbreak plate is inserted into the inner surface of the downwardly bent portion at both sides of the upper plate of the rail plate, so that the rail plate is coupled with the windbreak plate and installed.

The window frame lower frame structure according to the present invention is coupled to the window frame lower frame and additionally installed on the lower part of the rail plate that hides the inside of the lower frame from being exposed to the outside by combining it with the lower frame. Because of its structure, the open upper part of the lower frame is closed by a plate-shaped windbreaker, and it is double-closed by a rail plate attached to the upper part of the windbreaker, so wind, noise, dust, and foreign matter through the window frame lower frame are blocked. It can significantly reduce or reliably block indoor inflow. In addition, since a drainage hole is formed at an appropriate location on the windbreak plate and a film that opens in one direction, that is, only at the bottom, is attached to the bottom, rainwater accumulated on the top of the windbreak plate can be drained smoothly.

Figure 1 is a cross-sectional view of a window on which a window frame lower frame according to the present invention is installed.
Figure 2 is a diagram illustrating a windshield.
Figures 3a and 3b show an embodiment showing the state in which the windshield and the injected product are disposed when the injected product is installed in the lower frame of the window frame.
Figures 4 and 5 are diagrams showing examples of injection-molded products.

The technical feature of the window frame lower frame structure according to the present invention is that a plate-shaped windbreaker is additionally installed on the lower part of the rail plate coupled to the lower frame of the window frame, and the open upper part of the window frame lower frame is connected to the windbreaker and rail. By constructing it to be double closed with a plate, the airtightness and windproof function of the window frame lower frame is improved and the inflow of foreign substances is prevented.

Since the difference between single glazing and double glazing is only in the number of windows, the window frame structure according to the present invention is equally applicable to single glazing as well as double glazing, and to aluminum windows, PVC windows, and composite windows using a composite material of aluminum and PVC. Please make it clear in advance that this applies.

In addition, in the window frame according to the present invention, the inside of the lower frame of the window frame is not exposed to the outside, but a rail plate with a rail formed on the upper surface is coupled to the upper part of the lower frame and is hidden by the rail plate, so that the inside of the lower frame is not exposed to the outside. Applies to frames. As shown in Figure 1, the window frame lower frame 10 is composed of an indoor side wall 12 and an outdoor side wall 13 on the indoor and outdoor sides of the frame body 11, and the indoor side wall 12 and It is a frame constructed by opening the upper part of the frame body 11 between the outdoor side walls 13, and the frame body 11, the indoor side wall 12, and the outdoor side wall 13 can be manufactured separately and combined into one piece. , they may be manufactured integrally from the beginning, or they may be manufactured by combining them with additional insulation materials inserted. The subframe of the window frame with this structure is a characteristic configuration unique to the present invention, and the subframe of the window frame itself has already been manufactured. Since it is well known and is being implemented publicly, detailed explanations regarding this will be omitted.

As shown in Figure 1, guide wings 411 are formed on the lower part of the window lower frame 41 to guide the movement of the window 40, and the mohair fastening portion 253 of the rail plate 25 Guide vanes 411 are inserted and installed in the gap (gap) formed between the mohair fastening parts 121 and 131 of the indoor side wall and the outdoor side wall and the mohair fastening part 112a of the partition, and are positioned spaced apart from each other. Since a gap is inevitably formed between the mohair fastening parts (121, 131, 253, and 112a) at a certain interval, even if mohair or a gasket is fastened in the gap, wind, noise, dust, and foreign matter from the outside are prevented through the spaced gap. There is a problem that light is introduced into the room.

The present invention is intended to solve the above problems. The window frame lower frame 10 according to the present invention is an indoor side wall (12) to prevent wind, noise, dust, and foreign substances from entering the room from the outside through the window frame lower frame. ) and the outdoor side wall 13 and the partition wall 112, the most characteristic feature is that a windbreak plate 20 is further installed at the bottom of the rail plate 25 to close the open upper part of the frame body 11 located between the outdoor side wall 13 and the partition wall 112. am. Here, the guide vane 411 may be formed on one or both sides of the lower part of the window lower frame 41, and since this has nothing to do with the characteristic configuration of the present invention and has already been implemented, detailed description will be omitted.

Between the indoor side wall 12 and the outdoor side wall 13, a partition wall 112 is installed to divide the upper part of the frame body 11 into the indoor side and the outdoor side, and between the indoor side wall 12 and the partition wall 112 and Between the outdoor side wall 13 and the partition wall 112, a pair of supports 111 are installed to protrude upward, and the supports 111 are combined with the windshield plate 20 or the rail plate 25 to support them. This is a configuration for this purpose, but the supports 111 do not necessarily need to be installed as a pair, and the shape or structure can be changed as long as it is combined with the windshield plate 20 or the rail plate 25 and has a structure that can support them. Although not shown, drain holes for draining rainwater accumulated on the upper surface of the frame main body 11 are formed in the support 111, the outdoor side wall 13, and the partition wall 112 on the upper surface of the frame main body 11.

The rail plate 25 has a top plate 251 with a rail protruding along the longitudinal direction at the center of the top surface of the plate, and a support coupling portion 252 protruding downward from the lower surface of the top plate 251, Both side ends of the top plate 251 are bent downward along the longitudinal direction, and a mohair fastening portion 253 is formed on the outer surface of the bent portion, and a window is formed along the rail formed on the top of the top plate 251. (40) opens and closes as it slides. The bent portion at the side end of the top plate 251 may be installed on only one side or on both sides. When the bent portion is installed on only one side, the guide vanes 411 are installed only on the bent portion, and on both sides. When the bent portion is installed, guide vanes 411 are also installed on both sides of the lower part of the window lower frame 41.

The rail plate 25 may be installed in combination with the support 111 protruding from the upper surface of the frame body 11, and the support coupling portion 252 protruding from the lower surface of the rail plate is the upper coupling portion 212 of the windshield. ) can also be installed in combination with. Although not shown, the support coupling portion 252 is not formed on the lower surface of the rail plate, and the upper coupling portion 212 protruding from the upper surface of the plate 21 of the windbreak plate is formed at both side ends of the upper plate 251 of the rail plate. ), the rail plate 25 may be installed in combination with the windshield plate 20 by being bent downward along the longitudinal direction and inserted into the inner surface of the bent portion.

The most characteristic configuration of the present invention is the windbreak plate 20, which includes a plate-shaped plate 21 and a lower coupling portion ( 211) and an upper coupling portion 212, and drain holes 213 formed at both ends in the longitudinal direction of the plate 21. There is no limit to the number and formed positions of the drain holes 213. There is no, and the drain hole 213 may not be provided. The lower coupling portion 211 is installed to be located on the upper part of the frame body 11 by combining it with the support 111 provided on the frame body, so that the plate 21 of the windbreaker is connected to the indoor side wall 12 and the outdoor side wall 13. and the open upper part of the frame body 11 between the partition walls 112 is closed (see Figure 2).

Since it is necessary to block or prevent wind or dust from entering the indoor side, it is most desirable to install the windbreaker 20 between the indoor side wall 12 and the partition wall 112, but the outdoor side wall 13 and the partition wall 112 ), and can be installed on both sides of the partition wall 112. This is not a technical issue, but a matter of simple choice that can be made without any difficulty.

It is desirable to install a film 23 on the lower surface of the plate 21 of the windbreak plate that closes the drain hole 213 and opens in one direction, that is, downward. The film 23 can be installed in various ways, for example, by inserting one side of the film 23 into the 'ㄴ' shaped film mounting portion 214 formed on the lower surface of the plate 21 and installing the film mounting portion ( 214), it is desirable to have the opposite side of the inserted side open. In normal times, the film 23 is in close contact with the lower surface of the plate 21 of the windshield and maintains the drain hole 213 closed (see Figure 2).

The film 23 installed in this way closes the drain hole 213 as the film 23 comes into close contact with the lower surface of the plate 21 when wind tries to flow in from the lower part of the windshield plate 20 to the upper part, thereby preventing wind or foreign matter. It blocks the inflow of water into the room, and when rainwater accumulates on the upper part of the plate 21 of the windbreak, the rainwater accumulates on the upper part of the film 23, and the film 23 is mounted on the film mounting part 214 by the weight of the rainwater. The side opposite to the exposed side is bent and opened to drain rainwater into the lower part of the plate 21 of the windshield. Therefore, the film 23 acts like a check valve to drain rainwater to the lower part of the plate 21, but blocks wind, dust, or foreign substances from entering the room from the lower part of the plate 21 to the upper part.

Instead of installing the film 23 on the lower part of the plate 21 of the windshield, the injection molded product 30 may be installed at the location where the film 23 is installed. Such an injection product is formed in the shape of a hexahedron with the flat plate 31 having a plate shape and a first drain hole 311 formed thereon, and the flat plate 31 as the upper surface, and is located at the lower part of the flat plate 31. It is formed by providing a lower body 32 with a second drain hole (not shown) formed on the bottom of the hexahedron or on the side located in the longitudinal direction, and the first drain hole 311 is blocked at the bottom of the plate 31. It is constructed by installing a film 33 that closes the first drain hole 311 and opens it only in one direction, that is, downward. The first drain hole 311 must be installed so that it matches the drain hole 213 formed in the windshield 20. In addition, both sides or one side located in the longitudinal direction of the lower body 32 may be open. If the side is open, the open side serves as a drain hole, so it is necessary to install a second drain hole separately. There is no

The longitudinal lengths of the flat plate 31 and the lower body 32 are the same, but the width of the flat plate 31 is formed to be larger than the width of the lower body 32, so that it has a plate shape ( The plate portion is inserted and installed into the 'ㄴ' shaped film mounting portion 214. When installing the film 23, the film mounting portion 214 is formed on only one side, but when installing the injection molded product 30, it is formed on both sides. It must be done.

Instead of installing the windbreak plate 20 on the entire upper surface of the frame body 11 of the window frame lower frame, the injection molded product 30 may be installed at both longitudinal ends of the windbreak plate 20. In this case, the windbreak plate ( There is no need to form a drain hole 213 in the plate 21 of 20, and it is preferable to form a drain hole in the injection-molded product 30 (see FIG. 3A).

The injection-molded product 30 is configured to have the same or similar shape as the injection-molded product 30 installed on the lower part of the plate 21 of the windshield. That is, the injection molded product 30 is plate-shaped and has a flat plate 31 on which the first drain hole 311 is formed, and is formed in a hexahedral shape with the flat plate 31 as the upper surface and is located at the lower part of the flat plate 31. It is composed of a lower body 32 with a second drain hole (not shown) formed on the bottom of the hexahedron or on the side located in the longitudinal direction, and is installed in the lower part of the plate 31 to form a first drain hole ( 311) is blocked and closed, and is provided with a film 33 that opens the first drain hole 311 in only one direction. The width of the plate 31 is the same as the width of the plate 21 of the windshield, and the lower The body 32 is installed to be positioned between a pair of supports 111 installed on the frame body 11 (see Figure 4). There is no need to specifically limit the number and installation positions of the first drain holes 311.

In addition, the windbreak plate 20 may be formed by dividing it along the longitudinal direction, and the windbreak plate 20 may be installed separately on both sides on the upper part of the frame body 11, and the injection-molded product 30 may be installed between them (FIG. 3b) reference). Of course, in this case, the injection molding material 30 can also be installed at both ends of the windshield.

Figure 5 is a view showing another embodiment of the injection-molded product. The injection-molded product 30' does not form a hexahedral-shaped lower body 32 at the lower part of the flat plate 31', but is limited to the lower part of the flat plate 31'. It forms a pair of flat supports (32'). Specifically, the injection molded product 30' is plate-shaped and has a first drain hole 311', and a pair of flat plate supports 32' are installed protruding from the bottom of the plate along the longitudinal direction. A film 33 is formed of a flat plate 31', and on the lower part of the flat plate 31', the first drainage hole 311' is closed and the first drainage hole 311' is opened in one direction only. is installed, and in order to install the film 33, it is desirable to form an 'ㄴ' shaped film mounting portion 312' at the lower part of the flat plate 31'. There is no need to specifically limit the number and installation location of the first drain holes 311'. The width of the flat plate 31' is the same as the width of the plate 21 of the windshield, and the flat plate support 32' is installed in combination with a pair of supports 111 installed on the frame body 11. Installing the windbreak plate 20 separately along the longitudinal direction and installing the injection molded product 30' between them is the same as the embodiment described above.

The above description is an illustrative description of the present invention, and the embodiments published in the specification are not intended to limit the technical idea of the present invention, but are for illustrative purposes, so those skilled in the art Various modifications and variations will be possible without departing from the technical idea of . Therefore, the scope of protection of the present invention should be interpreted based on the matters stated in the claims, and technical matters within the equivalent scope thereof should also be interpreted as being included in the scope of rights of the present invention.

10: Window frame lower frame 11: Frame body
111: support 112: bulkhead
12: Indoor side wall 121: Mohair fastening part
13: Outdoor side wall 131: Mohair fastening part
20: windbreaker 21: plate
211: lower coupling part 212: upper coupling part
213: drain hole 214: film mounting portion
23: film
25: rail plate 251: top plate
252: support coupling part 253: mohair fastening part
30, 30': Injection molded product 31, 31': Flat plate
311, 311': first drain hole 312, 312': film mounting portion
32: Lower body 32': Flat support
33: film
40: window 41: window lower frame
411: Guide wing

Claims (9)

In the window frame lower frame, which has indoor side walls and outdoor side walls on the indoor and outdoor sides of the frame body, and the upper part of the frame body is open,
The window frame lower frame is,
A frame body (11) consisting of a partition wall dividing the indoor side and the outdoor side, installed between the indoor side wall and the outdoor side wall, and a pair of supports protruding between the indoor side wall and the partition wall and between the outdoor side wall and the partition wall, respectively:
It is composed of a plate-shaped plate, a lower coupling part and an upper coupling part respectively protruding from the lower and upper surfaces of the plate, and drain holes formed at both ends of the plate in the longitudinal direction, and the lower coupling part A windbreaker plate (20) installed in combination with a support provided on the additional frame body so that the plate closes the open upper part of the frame body between the indoor side wall, the outdoor side wall, and the partition wall;
It is provided with a top plate with a rail protruding along the longitudinal direction at the center of the upper surface of the plate, and a support joint formed protruding on the lower surface of the top plate, and both side ends or one end of the top plate are bent downward along the longitudinal direction. A rail plate (25) in which a mohair fastening portion is formed on the outer surface of the bent portion, and the support coupling portion is installed in conjunction with the upper coupling portion of the windshield;
It is composed including,
An injection-molded product is further installed on the lower surface of the plate 21 of the windshield plate at the portion where the drain hole 213 is formed, and the injection-molded product 30 is,
A flat plate (31) that is plate-shaped and has a first drain hole (311);
A lower body (32) formed in a hexahedral shape with the flat plate as its upper surface and located at the lower part of the flat plate, and having a second drain hole formed on the lower surface of the hexahedral shape or on the side located in the longitudinal direction;
A film 33 installed on the lower part of the flat plate to block and close the first drain hole 311 and then open the first drain hole 311 in only one direction;
A window frame lower frame structure to improve airtightness and windproof function and prevent the inflow of foreign substances, comprising a.
According to paragraph 1,
The windshield is a window frame lower frame structure for improving airtightness and windproof function and preventing the inflow of foreign substances, characterized in that it is installed between the interior side wall and the partition.
According to paragraph 1,
A window frame lower frame structure for improving airtightness and windproof function and preventing the inflow of foreign substances, characterized in that a film is further installed on the bottom of the plate of the windbreaker to block the drain hole and then open only in one direction.
delete According to paragraph 1,
Instead of installing the injection-molded material on the lower surface of the plate of the windshield plate at the portion where the drain hole is formed, the injection-molded material is installed at both ends in the longitudinal direction of the windshield plate 20,
The injection molded products installed at both longitudinal ends of the windbreak plate 20 are,
A flat plate (31) that is plate-shaped and has a first drain hole (311);
A lower body (32) formed in a hexahedral shape with the flat plate as its upper surface and located at the lower part of the flat plate, and having a second drain hole formed on the lower surface of the hexahedral shape or on the side located in the longitudinal direction;
A film 33 installed on the lower part of the flat plate to block and close the first drain hole and then open the first drain hole in only one direction;
It is configured to include, the width of the flat plate is the same as the plate width of the windshield, and the lower body is installed to be located between a pair of supports installed on the frame body, improving airtightness and windproof function and removing foreign substances. Window frame lower frame structure to prevent inflow.
According to paragraph 1,
Instead of the injected product 30 being installed on the lower surface of the plate of the windbreak plate in the portion where the drain hole is formed, the injected product 30' is installed at both ends in the longitudinal direction of the windbreak plate,
The injection product 30' is,
A flat plate (31') that is plate-shaped, has a first drainage hole (311'), and has a pair of flat plate supports (32') protruding from the lower part of the plate shape along the longitudinal direction.
A film 33' installed on the lower part of the flat plate to block and close the first drain hole and then open the first drain hole in only one direction;
It is configured to include, and instead of the drain hole 213 being formed in the windshield, a first drain hole 311' is formed in the flat plate 31' of the injection molded product 30',
The width of the flat plate is the same as the plate width of the windbreak plate, and the flat support is installed in combination with a pair of supports installed on the frame body. A window frame lower frame structure to improve airtightness and windproof function and prevent the inflow of foreign substances. .
According to claim 5 or 6,
The windshield is installed separately along the longitudinal direction, and an injection-molded material is installed between the separately installed windshields. A window frame lower frame structure for improving airtightness and windproof function and preventing the inflow of foreign substances.
According to clause 5,
A window frame lower frame structure for improving airtightness and windproof function and preventing the inflow of foreign substances, characterized in that both sides or one side located in the longitudinal direction of the lower body are open, and the open side functions as a second drain hole. .
According to paragraph 1,
The rail plate includes a top plate with a rail protruding along the longitudinal direction in the center of the upper surface of the plate, and both side ends of the top plate are bent downward along the longitudinal direction, and mohair is placed on the outer surface of the bent portion. Each fastening part is formed and configured,
The rail plate is installed in combination with the windbreak plate as the upper coupling part of the windbreak plate is inserted into the inner surface of the downwardly bent portion at both ends of the upper plate of the rail plate. This is to improve airtightness and windproof function and prevent the inflow of foreign substances. Window frame lower frame structure.

Images