Curtain wall type window structure for large openings

Abstract

A curtain wall type window structure for large openings is provided, which achieves both heat insulating performance and strength and prevents damage caused by differential deformation due to thermal deformation between different types of materials. [Solution] A curtain wall type window structure 1 for large openings in which multiple glass panels G are installed against a large opening O in a wall W of a building, the structure comprises multiple plastic window frames 2 which hold the glass panels G and are arranged in a line up and down and left and right relative to the large opening O, and multiple metal supports 3 which are erected on the indoor side of the building of the large opening O, and the vertical joints between the plastic window frames 2 arranged side by side on the left and right are connected to the metal supports 3 by a thermal deformation absorbing joint mechanism 4 which absorbs differences in deformation due to thermal deformation.

Description

[Technical field]

[0001] The present invention relates to a curtain wall type window structure for a large opening, for installing multiple glass plates in a large opening in the wall surface of a building. [Background technology]

[0002] Curtain walls, which form the exterior surface of a typical building, are constructed by incorporating panel components such as glass plates and decorative panels within a rectangular frame formed by vertical bars extending vertically and horizontal bars extending horizontally.

[0003] The vertical and horizontal bars of conventional curtain walls are made of metal, mainly aluminum. The Standard Specifications for Public Building Construction, which is one of the guidelines for public building construction, also contains various regulations regarding aluminum curtain walls.

[0004] In addition, the metal curtain walls that are regulated are for each floor, and there are almost no regulations for open-ceiling types that span multiple floors. However, in recent years, large glass screen structures for the purpose of natural lighting have been attracting attention, and there is an increasing need for open-ceiling types.

[0005] In addition, with the promotion of Net Zero Energy Building (ZEB) standards, there is a demand for high thermal insulation in large glass screen structures.

[0006] In order to solve the problems of condensation and costs involved in highly insulating such large glass screen structures, as well as the problem of ease of assembly, the inventor of the present application disclosed in Patent Publication No. 6592058 an invention relating to a curtain wall for a building which is formed by incorporating panel components such as glass plates within a frame formed of vertically extending mullions and horizontally extending transoms which are equipped with mounting members made of a non-metallic material which has a lower thermal conductivity than metal, and has obtained a patent for this invention (Patent Document 1). [Prior art documents] [Patent documents]

[0007] [Patent Document 1] Patent No. 6592058 Summary of the Invention [Problem to be solved by the invention]

[0008] Incidentally, resin window frames have been used to secure glass sheets to the exterior walls of buildings. These resin window frames have better insulation performance than metal window frames such as aluminum sashes, and are used in many ordinary homes.

[0009] However, plastic window frames to date have dimensions of up to 2 meters square at most, and there are no frames for large openings. Although it is possible to install multiple plastic window frames side-by-side and vertically for large openings, plastic window frames to date have been weaker than metal window frames and have not been strong enough to be used side-by-side.

[0010] One possible measure to reinforce such plastic window frames is to erect high-strength metal posts along the vertical frame of the window frame like mullions and have the plastic window frame supported by the metal posts, but the plastic window frame and the metal posts have different amounts of deformation due to thermal expansion, which can lead to damage. In particular, when installed in a large opening spanning multiple floors, the difference in deformation amount increases in proportion to the height (length) of the metal posts, making the frame more susceptible to damage.

[0011] Due to issues with strength and thermal deformation between dissimilar materials, there have been no known structures to date that install multiple plastic window frames over a large opening.

[0012] The present invention has been made to solve the problems described above, and aims to provide a curtain wall-type window structure for large openings that achieves both insulation performance and strength, and prevents damage caused by differential deformation due to thermal deformation between dissimilar materials. [Means for solving the problem]

[0013] The large-opening curtain wall window structure of the present invention is a curtain wall window structure for large openings in which multiple glass panels are installed in a large opening in the wall of a building, in order to solve the problem of achieving both insulating performance and strength while preventing breakage and the like due to differential deformation caused by thermal deformation between dissimilar materials. The structure has multiple resin window frames that hold the glass panels and are arranged in a line up and down and left and right relative to the large opening, and multiple metal supports that are erected on the indoor side of the large opening inside the building, and the vertical joints between the resin window frames arranged side by side on the left and right are connected to the metal supports by a thermal deformation absorbing joint mechanism that absorbs differential deformation due to thermal deformation.

[0014] In addition, as one aspect of the present invention, in order to solve the problem of preventing damage due to deformation differences caused by thermal deformation between dissimilar materials and preventing damage due to loads from above and shaking such as earthquakes, the thermal deformation absorbing joint mechanism may be configured to connect the vertical joint and the metal support pillar in a state in which they can move relatively in the up-down and left-right directions but cannot move in the front-back direction.

[0015] Furthermore, as one aspect of the present invention, in order to solve the problem of preventing damage or the like due to differential deformation caused by thermal deformation between dissimilar materials with a simple configuration and in a reliable manner, the thermal deformation absorbing joint mechanism has a window-side convex joint portion installed so as to be movable in the vertical direction at the vertical joint of the resin window frame, and a pillar-side concave joint portion installed so as to be movable in the left-right direction on the metal pillar, and the window-side convex joint portion and the pillar-side concave joint portion may be connected to each other so as to be movable in the vertical direction with their respective convex portions and concave portions combined.

[0016] In addition, as one aspect of the present invention, in order to solve the problem of improving the load-bearing strength of a plastic window frame located above, the plastic window frame has a reinforcing metal core made of metal built in, and the outer surface of the reinforcing metal core is formed into a substantially rectangular frame shape by left frame portion, right frame portion, upper frame portion and lower frame portion formed of resin material, and the reinforcing metal cores of the left frame portion and the lower frame portion, and the reinforcing metal cores of the right frame portion and the lower frame portion may be connected to each other by L-shaped metal fittings located at the lower left and right corners of the plastic window frame.

[0017] Furthermore, as one aspect of the present invention, in order to solve the problem of reducing the labor required for installation work at construction sites, thereby reducing installation costs and installation errors, and improving the strength of plastic window frames, in a plastic window frame unit in which multiple plastic window frames are fixed in a vertical line, the L-shaped metal fittings may be installed at the lower left and right corners of the lowest plastic window frame.

[0018] Furthermore, as one aspect of the present invention, in order to solve the problem of preventing internal leakage of water that seeps in through the joints between plastic window frames, the plastic window frame may be formed with a concave water receiving groove along its outer peripheral surface, and a suction and drainage rope may be embedded in the water receiving groove to absorb water that seeps in through the vertical and horizontal joints between the plastic window frames and drain the water by dripping it into the water receiving groove of the plastic window frame below.

[0019] Furthermore, as one aspect of the present invention, in order to solve the problem of improving the design when multiple plastic window frames are installed in a large opening, opposing connecting grooves may be formed on the joint surfaces of adjacent plastic window frames, and one connecting plate may be inserted into each connecting groove. Effect of the Invention

[0020] According to the present invention, it is possible to achieve both heat insulating performance and strength, and to prevent damage caused by the difference in deformation due to thermal deformation between different types of materials. [Brief description of the drawings]

[0021] [Figure 1] FIG. 1 is a front view showing an embodiment of a large-opening curtain wall window structure according to the present invention. [Diagram 2] FIG. 2 is a front view showing a resin window frame in this embodiment. [Diagram 3] This is a cross-sectional view showing a vertical joint that joins adjacent plastic window frames on the left and right in this embodiment, a metal support pillar, and a thermal deformation absorbing joint mechanism that connects them. [Figure 4] 4A is a front view showing the state before welding of the left frame portion and the upper frame portion in this embodiment, and FIG. 4B is a front view showing the state after welding of the left frame portion and the upper frame portion in this embodiment. [Diagram 5] 1A and 1B are a front view and a side view showing an L-shaped metal fitting in this embodiment. [Figure 6] 1A and 1B are front and side views showing the state in which an L-shaped metal fitting is installed on the lower left corner of a plastic window frame in this embodiment. [Figure 7] 4 is a vertical cross-sectional view showing a horizontal joint that joins adjacent plastic window frames vertically in this embodiment. FIG. [Figure 8] A front view showing a resin window frame unit in this embodiment. [Figure 9] 3A and 3B are a front view and a plan view showing the window-side convex joint portion in this embodiment. FIG. [Figure 10] 3A is a front view, FIG. 3B is a plan view, and FIG. 3C is a right side view showing the support-pillar-side concave joint portion in this embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, one embodiment of a large-opening curtain wall type window structure according to the present invention will be described with reference to the drawings.

[0023] The large-opening curtain wall window structure 1 of this embodiment is a structure for installing multiple glass sheets G at a large opening O in a wall surface W of a building, as shown in Fig. 1, and has multiple resin window frames 2, multiple metal supports 3 that support the multiple resin window frames 2, and a thermal deformation absorbing joint mechanism 4 that connects the resin window frames 2 and the metal supports 3, as shown in Fig. 3. Each component will be described in detail below.

[0024] The large opening O is an opening formed in a wall W that separates the indoors and outdoors of a building, and in this embodiment, in a building with multiple floors, it is configured as a roughly rectangular opening that is opened wide so as to span each floor in a wall W in an open-air structure formed across multiple floors.

[0025] The resin window frame 2 is for holding a glass sheet G in the large opening O, and in this embodiment, as shown in Figures 2 and 3, is formed into a substantially rectangular frame shape by a plurality of frame portions 21, specifically, by a left frame portion 21a, a right frame portion 21b, an upper frame portion 21c, and a lower frame portion 21d. The glass sheet G is fitted into the inner periphery of the resin window frame 2 and fixed therein by a removable retaining edge 22.

[0026] As shown in FIGS. 2 and 3, each frame portion 21 in this embodiment incorporates a reinforcing metal core material 23 made of metal, and the outer surface of the reinforcing metal core material 23 is covered with a resin material 24.

[0027] The reinforcing metal core material 23 is intended to reinforce each frame portion 21, and in this embodiment is made of a hollow metallic square pipe material having a substantially rectangular cross section, as shown in FIG. 3.

[0028] The reinforcing metal core 23 is not limited to a square pipe material, but may be appropriately selected from a metal bar material having a round cross section or a solid shape, a metal plate material, an angle material having an L-shaped cross section, etc. The material of the reinforcing metal core 23 is not particularly limited, but it is preferable to use an inexpensive and strong material such as iron or aluminum.

[0029] The resin material 24 is intended to improve the heat insulating performance while defining the shape of each frame portion 21, and is made of a resin with lower thermal conductivity (heat is less likely to be transmitted) than the reinforcing metal core material 23, and is formed so as to cover the outer surface of the reinforcing metal core material 23. In this embodiment, the resin material 24 is formed into a predetermined shape by extrusion processing, and is formed by inserting the reinforcing metal core material 23.

[0030] The resin used for the resin material 24 is mainly hard vinyl chloride resin, but is not limited to this, and may be appropriately selected from resin materials with high heat insulating properties.

[0031] Moreover, each frame portion 21 is formed into a rectangular shape by welding the ends of the frame portion 21. Specifically, as shown in Fig. 4, both ends are formed with inclined portions 25 at an angle of about 45 degrees with respect to the longitudinal direction of the frame portion 21, and the inclined portions 25 are welded to the inclined portions 25 of other frame portions 21 to form a rectangular frame shape.

[0032] At this time, the reinforcing metal core material 23 has a higher melting point than the resin material 24, and cannot be welded in the temperature range for welding the resin material 24. Therefore, the resin window frame 2 in this state is weak in strength, with only the resin materials 24 connected together. Therefore, in this embodiment, the reinforcing metal core materials 23 are connected together by L-shaped metal fittings 26.

[0033] Specifically, the L-shaped metal fittings 26 are L-shaped metal fittings formed by bending a metal plate at approximately 90 degrees, as shown in Fig. 5. In this embodiment, as shown in Fig. 6, the L-shaped metal fittings 26 are arranged at the left and right lower corners of the resin window frame 2, and are fastened and fixed to the reinforcing metal core materials 23 of the left frame portion 21a and the lower frame portion 21d, and to the reinforcing metal core materials 23 of the right frame portion 21b and the lower frame portion 21d, by fasteners 27 made of drill screws. This connects the reinforcing metal core materials 23 of the left frame portion 21a and the lower frame portion 21d, and to the right frame portion 21b and the lower frame portion 21d, and increases the strength of the left and right lower corners of the resin window frame 2.

[0034] The placement of the L-shaped metal fittings 26 is not limited to the lower left and right corners of the resin window frame 2, but may be placed at the upper left and right corners to connect the reinforcing metal cores 23 of the left frame portion 21a and the upper frame portion 21c, and the right frame portion 21b and the upper frame portion 21c.

[0035] In addition, the plastic window frame 2 in this embodiment is formed with a water receiving groove 28 for burying a suction and drainage rope 5 to drain water that has seeped in through the joint with an adjacent plastic window frame 2 out of the frame, and a connecting groove 29 for inserting a connecting plate 6 for positioning adjacent plastic window frames 2 in predetermined positions.

[0036] 3 and 7, the water-receiving groove 28 is a groove formed in a concave shape along the outer circumferential surface of the resin window frame 2, and in this embodiment, is formed on the outdoor side of the center position in the front-to-rear direction of the resin window frame 2. The water-receiving groove 28 in this embodiment is formed with a slightly narrow entrance in order to hold the suction and drainage rope 5 to be buried.

[0037] The water supply and drainage rope 5 is a rope that absorbs water that seeps in through the vertical and horizontal joints between the resin window frames 2 and drains the absorbed water by dripping it into the water receiving groove 28 of the resin window frame 2 below.In this embodiment, the water supply and drainage rope 5 is made of a rope woven from synthetic resin fibers such as nylon or polyethylene to a thickness that allows it to be embedded in the water receiving groove 28, and is embedded in the water receiving groove 28 on three sides other than the bottom frame portion 21d.

[0038] The material of the suction and drainage rope 5 is not limited to resin such as nylon, and natural materials such as hemp and cotton may be used. The suction and drainage rope 5 may be embedded in the entire outer periphery of the resin window frame 2, including the lower frame portion 21d.

[0039] The connecting groove 29 is a groove into which the connecting plate 6 is inserted when joining horizontally or vertically adjacent plastic window frames 2, and in this embodiment, as shown in Figures 3 and 7, is formed on the joining surfaces of the plastic window frames 2 at the same position from the outdoor side of the plastic window frames 2 and at positions facing each other.

[0040] The connecting plate 6 is a plate that is inserted into the connecting groove 29 between the resin window frames 2 at the joint surfaces thereof, and is formed to a thickness that is approximately the same as the front-to-rear width of the connecting groove 29. The connecting plate 6 is made of a metal such as iron or aluminum, but the material is not particularly limited.

[0041] In this embodiment, a resin window frame unit 2U is formed using the above-mentioned resin window frames 2. Specifically, as shown in Fig. 8, three resin window frames 2 are lined up vertically in advance in a factory or the like, and as shown in Fig. 7, the reinforcing metal core material 23 of the lower frame portion 21d of the upper resin window frame 2 and the reinforcing metal core material 23 of the upper frame portion 21c of the lower resin window frame 2 are fastened and fixed with unit fasteners 30 to form a unit.

[0042] In addition, in the resin window frame unit 2U, the L-shaped metal fittings 26 are installed at the lower left and right corners of the bottommost resin window frame 2.

[0043] In addition, the L-shaped metal fittings 26 in the plastic window frame unit 2U are not limited to being installed only at the lower left and right corners of the bottommost plastic window frame 2, but may also be installed at the upper left and right corners of the topmost plastic window frame 2.

[0044] As shown in Fig. 1, the metal support 3 is a metal support that supports multiple plastic window frames 2 arranged side by side in the large opening O, and is erected on the indoor side of the building. As shown in Fig. 3, the metal support 3 in this embodiment is made of a metallic steel pipe that is hollow and has a substantially rectangular cross section, and is erected along the vertical joint between the plastic window frames 2 arranged side by side on the left and right, as shown in Fig. 1.

[0045] The metal support 3 is not limited to one made of steel pipe, but may be appropriately selected from H-shaped steel, L-shaped steel, solid steel bar, etc.

[0046] The thermal deformation absorbing joint mechanism 4 is a mechanism that can connect a resin window frame 2 and a metal support 3 while absorbing the difference in deformation due to the thermal deformation of the resin used in the resin window frame 2 and the thermal deformation of the metal used in the metal support 3.

[0047] In other words, the resin window frame 2 and the metal support 3 are made of materials with different thermal deformation characteristics, such as thermal expansion coefficients (linear expansion coefficients), and expand and contract differently in response to temperature changes. Specifically, the linear expansion coefficient of the hard polyvinyl chloride used in the resin window frame 2 is 50 to 100 [10 -6 / ℃]. In contrast, the linear expansion coefficient of aluminum used in the metal support 3 is approximately 23.9[10 -6 / °C], and rigid polyvinyl chloride undergoes a deformation difference of about two to four times that of aluminum. Therefore, when the plastic window frame 2 and the metal supports 3 are completely fixed together, a deformation difference occurs in response to temperature changes, and there is a risk that either or both of the plastic window frame 2 and the metal supports 3 will become distorted or damaged.

[0048] Therefore, in order to prevent damage due to differences in deformation caused by thermal deformation, the thermal deformation absorbing joint mechanism 4 is configured to connect the vertical joints of the resin window frames 2 to the metal supports 3 in a state in which they can move relatively in the up-down and left-right directions but cannot move in the front-back direction.

[0049] The thermal deformation absorbing joint mechanism 4 in this embodiment is composed of a window-side convex joint portion 41 installed on the resin window frame 2, and a pillar-side concave joint portion 42 installed on the metal pillar 3, as shown in Figure 3.

[0050] The window-side convex joint part 41 is a member installed at the vertical joint between the resin window frames 2, and is formed in a convex shape facing the metal support 3. As shown in Fig. 9, the window-side convex joint part 41 in this embodiment is composed of a pair of left and right L-shaped angle irons, one side of the L-shape serves as the window-side fixing part 411 that is fixed to the resin window frame 2, and the other side serves as the convex part 412.

[0051] In addition, the window side fixing portion 411 has a window side insertion hole 413 through which a fastener 43 consisting of a drill screw is inserted, and this window side insertion hole 413 is formed in the shape of a vertically elongated hole, as shown in Figure 9 (a).

[0052] This window side convex joint portion 41 is fastened and fixed to the resin window frame 2 by a fastener 43 inserted through the window side insertion hole 413. Specifically, as shown in Fig. 3, the left side window side convex joint portion 41 is fastened and fixed to the reinforcing metal core material 23 built into the right frame portion 21b of the resin window frame 2 arranged on the left side, and the right side window side convex joint portion 41 is fastened and fixed to the reinforcing metal core material 23 built into the left frame portion 21a of the resin window frame 2 arranged on the right side.

[0053] The pillar-side concave joint part 42 is a component installed on the metal pillar 3, and as shown in Figures 3 and 10, consists of a bottom part 421 fixed to the metal pillar 3, and clamping parts 422 formed on both the left and right ends of this bottom part 421 and clamping the convex part 412 of the window-side convex joint part 41 from both the left and right sides, and the bottom part 421 and the pair of left and right clamping parts 422 form a recess 423.

[0054] A post-side through-hole 424, through which the fastener 43 is inserted, is opened in the bottom portion 421. The post-side through-hole 424 is formed in a horizontally elongated hole shape, and the post-side concave joint portion 42 is installed so as to be movable in the left-right direction relative to the metal post 3.

[0055] Furthermore, a pair of left and right clamping portions 422 of the pillar-side concave joint portion 42 are provided with joint connection insertion holes 425 through which fasteners 43 are inserted to fasten and fix the convex portions 412 of the window-side convex joint portion 41. The joint connection insertion holes 425 are formed in the shape of vertically long holes, and the window-side convex joint portion 41 and the pillar-side concave joint portion 42 are connected to each other so as to be movable in the up and down direction with their respective convex portions 412 and concave portions 423 combined.

[0056] A sealant 44 for waterproofing is applied around the thermal deformation absorbing joint mechanism 4 that connects the vertical joints of the resin window frames 2 to the metal posts 3.

[0057] In the thermal deformation absorbing joint mechanism 4, the fasteners 43 used to fix the window side convex joint portion 41 and the pillar side concave joint portion 42 are not limited to drill screws, but may be appropriately selected from various fasteners such as female screws and bolts formed in advance on the resin window frame 2, the metal pillar 3, and the convex portion 412 of the window side convex joint portion 41.

[0058] Next, the function of each component in the large-opening curtain wall type window structure 1 of this embodiment will be described.

[0059] In this embodiment, a plurality of plastic window frames 2 (including plastic window frame units 2U, the same applies below) are arranged side by side in a large opening O, as shown in Fig. 1. The resin material 24 covering the outer surface of the plastic window frame 2 has higher thermal insulation performance than conventional metal window frames, and contributes to meeting the Zero Energy Building (ZEB) standards.

[0060] Furthermore, the resin window frame 2 has reinforcing metal cores 23 built into each frame portion 21, and at least the reinforcing metal cores 23 of the left frame portion 21a and the lower frame portion 21d and the reinforcing metal cores 23 of the right frame portion 21b and the lower frame portion 21d are connected together by L-shaped metal fittings 26, thereby increasing strength. Therefore, when a plurality of resin window frames 2 are arranged vertically relative to the large opening O, they can be supported without being damaged even when they receive the load of other resin window frames 2 arranged above.

[0061] The metal posts 3 are connected to the vertical joints between the plastic window frames 2 via thermal deformation absorbing joint mechanisms 4, and support the plastic window frames 2 from inside the room. These metal posts 3 are stronger than the plastic window frames 2, and the thermal deformation absorbing joint mechanisms 4 connect the plastic window frames 2 and the metal posts 3 in a state where they cannot move in the front-to-rear direction, so that the multiple plastic window frames 2 arranged in the large opening O can withstand front-to-rear forces due to wind pressure from outside the room and pressure differences occurring inside and outside the building.

[0062] On the other hand, the thermal deformation absorbing joint mechanism 4 allows the resin window frame 2 and the metal support 3 to move relatively up and down. Specifically, the window side insertion hole 413, through which the fastener 43 that connects the resin window frame 2 and the window side convex joint portion 41 is inserted, and the joint connection insertion hole 425, through which the fastener 43 that connects the support side concave joint portion 42 and the window side convex joint portion 41 is inserted, are formed in the shape of a vertically long hole, and the resin window frame 2 and the metal support 3 can move relatively up and down by the dimensions of the window side insertion hole 413 and the vertically long hole of the joint connection insertion hole 425.

[0063] Therefore, if a difference in deformation occurs between the resin window frame 2 and the metal support 3 due to thermal deformation, they can move relatively in the vertical direction, so that no abnormal load is placed on the resin window frame 2 or the metal support 3, preventing distortion or damage.

[0064] Furthermore, the thermal deformation absorbing joint mechanism 4 in this embodiment connects the resin window frame 2 and the metal support 3 so that they can move relatively left and right as well. Specifically, the support-side insertion hole 424, through which the fastener 43 that connects the support-side concave joint portion 42 and the metal support 3 is inserted, is formed in a horizontally elongated hole shape, and the resin window frame 2 and the metal support 3 can move relatively left and right by the dimension of this horizontally elongated hole.

[0065] Therefore, the plastic window frame 2 and the metal support 3 can move relatively left and right when the load of another plastic window frame 2 above is applied or when there is shaking due to an earthquake, etc., so that no abnormal load is applied to the plastic window frame 2 or the metal support 3, preventing distortion or damage.

[0066] The suction and drainage ropes 5 absorb the infiltration water that seeps in through the vertical and horizontal joints between the plastic window frames 2 and flows into the water receiving grooves 28 by penetrating into the loops. The absorbed infiltration water moves horizontally and downward due to the capillary action of the suction and drainage ropes 5 and their own weight. When the infiltration water moves downward and becomes saturated and can no longer be held by the suction and drainage ropes 5, it drips into the water receiving grooves 28 of the plastic window frame 2 below and is drained, as shown in Figure 7. The infiltration water drained into the water receiving grooves 28 drips sequentially down the suction and drainage ropes 5 into the plastic window frames 2 below, and is drained out of the plastic window frame 2 from the suction and drainage ropes 5 of the lowest plastic window frame 2.

[0067] In this way, water that seeps in through the vertical and horizontal joints between the plastic window frames 2 is drained downward through the water receiving groove 28 and the suction and drainage ropes 5, thereby reliably preventing internal water leakage into the room.

[0068] The connecting plate 6 allows the resin window frames 2 to be installed in a predetermined position in the front-rear direction. In particular, the multiple resin window frames 2 installed in the large opening O are seen by many people from outside, so design is important. For this reason, for example, the outer surfaces of the resin window frames 2 can be installed without any steps, giving the impression of a neat and tidy arrangement.

[0069] According to the present embodiment as described above, the following effects can be obtained. 1. Since multiple resin window frames 2 with high insulating performance can be used for the large opening O, the insulating performance can be improved compared to the conventional curtain wall structure with a metal frame. 2. By supporting multiple resin window frames 2 arranged in line across the large opening O with multiple metal supports 3, the window can have the strength to withstand wind pressure from outside. 3. By connecting the plastic window frame 2 and the metal support 3 with a thermal deformation absorbing joint mechanism 4, the difference in thermal deformation caused by temperature changes can be absorbed, preventing distortion and damage to the plastic window frame 2 and the metal support 3. 4. The thermal deformation absorbing joint mechanism 4 connects the plastic window frame 2 and the metal support 3 so that they can move both vertically and horizontally, thereby enabling the plastic window frame 2 to withstand deformation caused by loads from above and shaking due to earthquakes, etc. 5. In the thermal deformation absorbing joint mechanism 4, the insertion holes for the fasteners 43 that connect the resin window frame 2, the metal pillars 3, etc. are made into a vertically or horizontally elongated hole, which is a simple structure, making it possible to enable movement in the vertical and horizontal directions. 6. The plastic window frame 2 has reinforcing metal cores 23 built into each frame portion 21, and the reinforcing metal cores 23 are connected to each other by L-shaped metal fittings 26 located at the lower left and right corners, so that the plastic window frame 2 has the strength to withstand the load from other plastic window frames 2 located above. 7. By lining up and fixing multiple plastic window frames 2 in the vertical direction to form a unit and reinforcing the left and right lower corners of at least the lowest plastic window frame 2 with L-shaped metal fittings 26, the amount of labor required for installation at the construction site can be reduced, cutting installation costs, and reducing installation errors to stabilize quality. 8. By embedding the suction and drainage rope 5 in the water receiving groove 28 formed along the outer peripheral surface of the plastic window frame 2, water seeping in from the vertical and horizontal joints between the plastic window frames 2 is absorbed by the suction and drainage rope 5 and can be appropriately dripped into the water receiving groove 28 of the plastic window frame 2 below and drained, thereby reliably preventing internal water leakage into the room. 9. The connecting plates 6 can connect adjacent resin window frames 2 at predetermined positions, making it possible to create a highly aesthetically pleasing wall surface W.

[0070] The large-opening curtain wall type window structure according to the present invention is not limited to the above-mentioned embodiment, and can be modified as appropriate. For example, the resin window frame 2 in this embodiment is described as a window frame for a fixed window (fixed window) in which a glass plate G is fitted and which cannot be opened or closed, but is not limited thereto, and may be used as a window frame for an openable window such as a single-opening window, a sash window, or a tilt-down window. [Explanation of symbols]

[0071] 1. Large opening curtain wall window structure 2 Plastic window frames 2U Plastic Window Frame Unit 3 Metal Supports 4. Thermal deformation absorbing joint mechanism 5. Suction and drainage rope 6 Connecting plate 21 Frame 21a Left frame 21b Right frame 21c Upper frame part 21d Lower frame part 22 Presser edge 23 Reinforcing metal core 24 Resin material 25 Slope 26 L-shaped bracket 27 Zipper 28 Water receiving groove 29 Connection groove 30 Unit Fasteners 41 Window side convex joint 42 Concave joint part on pillar side 43 Zipper 44 Sealant 411 Window side fixing part 412 Convex 413 Window side insertion hole 421 Bottom 422 Clamping part 423 Recess 424 Pillar side insertion hole 425 Joint connection hole W wall O Large opening G Glass plate

Claims

1. A curtain wall type window structure for a large opening in which a plurality of glass plates are installed for a large opening in a wall surface of a building, a plurality of resin window frames that hold the glass plates and are arranged in a vertical and horizontal direction relative to the large opening; a plurality of metal pillars erected on the indoor side of the building of the large opening, The vertical joints between the plastic window frames arranged side by side on the left and right and the metal posts are connected by a thermal deformation absorbing joint mechanism that absorbs deformation differences due to thermal deformation by forming insertion holes for inserting fasteners with dimensions that allow the plastic window frames and the metal posts to move relatively up and down. The resin window frame is a reinforcing metal core made of metal is built in, and the outer surface of the reinforcing metal core is formed into a substantially rectangular frame shape by a left frame portion, a right frame portion, an upper frame portion, and a lower frame portion which are made of a resin material; This curtain wall type window structure for large openings is characterized in that the reinforcing metal cores of the left frame portion and the lower frame portion, and the reinforcing metal cores of the right frame portion and the lower frame portion are connected to each other by L-shaped metal fittings arranged at the lower left and right corners of the plastic window frame.

2. A curtain wall type resin window structure for large openings as described in claim 1, in which a resin window frame unit in which a plurality of the resin window frames are arranged vertically and fixed, the L-shaped metal fittings are installed at the lower left and right corners of the lowest resin window frame.

3. 3. A curtain wall type window structure for large openings as described in claim 1 or claim 2, wherein a concave water receiving groove is formed in the resin window frame along the outer peripheral surface, and a suction and drainage rope is embedded in the water receiving groove to absorb water that seeps in from the vertical joints and horizontal joints between the resin window frames and drain the water by dripping it into the water receiving groove of the resin window frame below.

4. The curtain wall type resin window structure for large openings as described in claim 1, wherein opposing connecting grooves are formed on the joint surfaces of adjacent resin window frames, and one connecting plate is inserted into each connecting groove.

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