Large opening curtain wall window structure

Abstract

To provide a curtain wall type window structure for large openings that achieves both heat insulation performance and strength and prevents breakage due to differential deformation caused by thermal deformation between different materials. [Solution] A curtain wall-type window structure 1 for large openings in which multiple glass sheets G are installed in a large opening O in a wall W of a building, the structure comprising multiple resin window frames 2 that hold the glass sheets 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 that are erected on the interior side of the building of the large opening O, and the vertical joints between the resin window frames 2 arranged side by side on the left and right and the metal supports 3 are connected by a thermal deformation absorbing joint mechanism 4 that absorbs differences in deformation due to thermal deformation.

Description

[Technical Field]

[0001] The present invention relates to a curtain wall window structure for large openings, in which multiple glass sheets are installed in a large opening in the wall of a building. [Background technology]

[0002] Curtain walls, which form the exterior walls 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 have been 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 those that are formed on each floor, and there are almost no regulations for those that are formed on multiple floors with an atrium. However, in recent years, large glass screen structures that allow natural lighting have been attracting attention, and there is a growing demand for atrium types.

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

[0006] In Patent Publication No. 6592058, the inventor of the present application disclosed an invention relating to a curtain wall for a building, which is constructed by incorporating panel components such as glass plates within a frame formed by vertically extending mullions and horizontally extending transoms equipped with mounting members made of a non-metallic material with a lower thermal conductivity than metal, in order to solve the problems of condensation and cost when attempting to improve the insulation of such large glass screen structures, as well as the problem of ease of assembly, and 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, previous resin window frames were limited to dimensions of around 2 meters square, and none were available for large openings. While it is possible to install multiple resin window frames side-by-side and vertically for large openings, resin window frames have been weaker than metal window frames and have not been strong enough to be used side-by-side.

[0010] One possible solution to reinforce such plastic window frames is to erect strong metal supports along the vertical frame of the window frame like mullions, and have the plastic window frame supported by the metal supports. However, the plastic window frame and the metal supports are subject to different amounts of deformation due to thermal expansion, which can lead to breakage. In particular, when installed in a large opening spanning multiple floors, the difference in deformation increases in proportion to the height (length) of the metal supports, making the window more susceptible to breakage.

[0011] Due to the strength issues and the thermal deformation of dissimilar materials, no structures have been found to date that use multiple resin window frames for large openings.

[0012] The present invention has been made to solve the above problems, 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 different materials. [Means for solving the problem]

[0013] The large-opening curtain wall window structure of the present invention is a large-opening curtain wall window structure in which multiple glass plates are installed in a large opening in the wall of a building, in order to achieve both thermal insulation performance and strength and to solve the problem of preventing breakage due to differential deformation caused by thermal deformation between dissimilar materials.The large-opening curtain wall window structure has multiple resin window frames that hold the glass plates and are arranged in a row in the vertical and horizontal directions relative to the large opening, and multiple metal supports that are erected on the indoor side of the large opening within 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] Furthermore, as one aspect of the present invention, in order to solve the problem of preventing damage due to differences in deformation caused by thermal deformation between dissimilar materials, as well as preventing damage due to loads from above and shaking caused by earthquakes, etc., 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 relatively in the front-to-back direction.

[0015] Furthermore, as one aspect of the present invention, in order to solve the problem of preventing damage and 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 part that is installed so as to be movable in the vertical direction at the vertical joint part of the resin window frame, and a pillar-side concave joint part that is installed so as to be movable in the left-right direction on the metal pillar, and the window-side convex joint part and the pillar-side concave joint part may be connected to each other so as to be movable in the vertical direction with their respective convex parts and concave parts 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 placed 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 an approximately rectangular frame shape by a left frame portion, a right frame portion, an upper frame portion and a lower frame portion formed of a plastic 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 placed 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 have a concave water receiving groove formed along its outer surface, and a water intake 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, connecting grooves facing each other may be formed on the joint surfaces of adjacent plastic window frames, and one connecting plate may be inserted into each connecting groove. [Effects of the Invention]

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

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

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

[0023] As shown in Fig. 1, 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 W of a building, and includes multiple resin window frames 2, multiple metal supports 3 that support the multiple resin window frames 2, and, as shown in Fig. 3, a thermal deformation absorbing joint mechanism 4 that connects the resin window frames 2 and the metal supports 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 indoor and outdoor areas of a building, and in this embodiment, in a building with multiple floors, it is configured as a roughly rectangular opening that is wide open across each floor in a wall W in an open-air structure that spans multiple floors.

[0025] 2 and 3, the resin window frame 2 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 in place by a removable retaining edge 22.

[0026] As shown in FIGS. 2 and 3, each frame 21 in this embodiment incorporates a reinforcing metal core 23 made of metal, and the outer surface of the reinforcing metal core 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, as shown in Figure 3, is made of a hollow metallic square pipe material having a substantially rectangular cross section.

[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 enhance the heat insulating performance while defining the shape of each frame portion 21, and is made of a resin with lower thermal conductivity (less heat conduction) 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 then the reinforcing metal core material 23 is inserted into the resin material.

[0030] The resin used for the resin material 24 is mainly hard vinyl chloride resin, but is not limited to this and may be selected appropriately 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, inclined portions 25 are formed at both ends so as to form 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 required to weld 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 using L-shaped metal fittings 26.

[0033] Specifically, as shown in Fig. 5, the L-shaped metal fittings 26 are made of L-shaped metal fittings formed by bending a metal plate at approximately 90 degrees. In this embodiment, as shown in Fig. 6, they are arranged at the left and right lower corners of the resin window frame 2, and are fastened and fixed to the reinforcing metal cores 23 of the left frame portion 21a and the lower frame portion 21d, and to the reinforcing metal cores 23 of the right frame portion 21b and the lower frame portion 21d, with fasteners 27 made of drill screws. This connects the reinforcing metal cores 23 of the left frame portion 21a and the lower frame portion 21d, and to the reinforcing metal cores 23 of 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 also be placed at the upper left and right corners to connect the reinforcing metal core materials 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 resin window frame 2 in this embodiment is formed with a water receiving groove 28 for burying a water intake and drainage rope 5 to drain water that has seeped in from the joint with an adjacent resin window frame 2 out of the frame, and a connecting groove 29 for inserting a connecting plate 6 to position adjacent resin 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 peripheral surface of the resin window frame 2, and in this embodiment, it 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 to hold the suction and drainage rope 5 that will 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 also be used. The suction and drainage rope 5 may also be embedded in the entire outer periphery of the resin window frame 2, including the bottom frame portion 21d.

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

[0040] The connecting plates 6 are plates that are inserted into the connecting grooves 29 at the joint surfaces of the resin window frames 2, and are formed to a thickness that is approximately the same as the front-to-rear width of the connecting grooves 29. The connecting plates 6 are made of 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-described 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 resin window frame unit 2U are not limited to being installed only at the lower left and right corners of the lowest resin window frame 2, but may also be installed at the upper left and right corners of the highest resin window frame 2.

[0044] As shown in Fig. 1, the metal support 3 is a metal support that supports multiple resin window frames 2 that are installed 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 hollow metallic steel pipe with a substantially rectangular cross section, and is erected along the vertical joint between the resin window frames 2 that are arranged side by side on the left and right, as shown in Fig. 1.

[0045] The metal support 3 is not limited to steel pipes, but may be appropriately selected from H-beams, L-beams, solid steel bars, and the like.

[0046] The thermal deformation absorbing joint mechanism 4 is a mechanism that can connect the resin window frame 2 and the metal support 3 while absorbing the difference in deformation caused by 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, for example, different thermal expansion coefficients (linear expansion coefficients), and expand and contract differently in response to temperature changes. Specifically, the linear expansion coefficient of the hard vinyl chloride used in the resin window frame 2 is 50 to 100 [10 -6 / °C]. In contrast, the linear expansion coefficient of aluminum used in the metal support 3 is approximately 23.9[10 -6 / °C], and rigid vinyl chloride deforms two to four times more than aluminum. Therefore, when the resin window frame 2 and the metal support posts 3 are completely fixed together, a difference in deformation occurs in response to temperature changes, and there is a risk that either or both of the resin window frame 2 and the metal support posts 3 will be 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 between the resin window frames 2 and the metal support posts 3 in a manner that allows them to move relatively in the up-down and left-right directions but cannot move in the front-to-back direction.

[0049] As shown in Figure 3, 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.

[0050] The window-side convex joint part 41 is a component installed at the vertical joint between the resin window frames 2, and is formed in a convex shape facing the metal support post 3. As shown in Figure 9, the window-side convex joint part 41 in this embodiment is made up of a pair of left and right L-shaped angle irons, with one end of the L-shape serving as the window-side fixing part 411 that is fixed to the resin window frame 2, and the other end serving 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] The window-side convex joint portion 41 is then fastened to the resin window frame 2 by fasteners 43 inserted through the window-side insertion holes 413. Specifically, as shown in Figure 3, the left-side window convex joint portion 41 is fastened to the reinforcing metal core 23 built into the right frame portion 21b of the resin window frame 2 arranged on the left side, and the right-side window convex joint portion 41 is fastened to the reinforcing metal core 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 that is installed on the metal pillar 3, and as shown in Figures 3 and 10, it consists of a bottom part 421 that is fixed to the metal pillar 3, and clamping parts 422 that are formed on both the left and right ends of this bottom part 421 and that clamp 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 recessed part 423.

[0054] A post-side insertion hole 424, through which the fastener 43 is inserted, is opened in the bottom portion 421. This post-side insertion hole 424 is formed in the shape of a horizontally elongated hole, 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, the 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. These joint connection insertion holes 425 are formed in the shape of vertically elongated holes, and the window-side convex joint portion 41 and the pillar-side concave joint portion 42 are connected to each other so that they can move up and down relative to each other with their convex portions 412 and concave portions 423 fitted together.

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

[0057] In the thermal deformation absorbing joint mechanism 4, the fasteners 43 used to secure 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 window structure 1 of this embodiment will be described.

[0059] In this embodiment, multiple resin window frames 2 (including resin 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 resin 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 the reinforcing metal cores 23 of at least 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 multiple resin window frames 2 are arranged vertically in relation to the large opening O, they can support the load of other resin window frames 2 arranged above them without breaking.

[0061] The metal supports 3 are connected to the vertical joints between the plastic window frames 2 via thermal deformation absorbing joint mechanisms 4, supporting the plastic window frames 2 from inside the room. These metal supports 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 supports 3 in a manner that prevents them from moving in the front-to-rear direction, so the multiple plastic window frames 2 arranged in the large opening O can withstand front-to-rear forces caused by wind pressure from outside the room and pressure differences between the inside and outside of the building.

[0062] On the other hand, the thermal deformation absorbing joint mechanism 4 allows the resin window frame 2 and the metal support post 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 post-side concave joint portion 42 and the window-side convex joint portion 41 is inserted, are formed in the shape of a vertically elongated hole, so that the resin window frame 2 and the metal support post 3 can move relatively up and down by the dimensions of the window-side insertion hole 413 and the vertically elongated 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 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 post 3 so that they can move relatively left and right. Specifically, the support post-side insertion hole 424, through which the fastener 43 that connects the support post-side concave joint portion 42 and the metal support post 3 is inserted, is formed in the shape of a horizontally elongated hole, and the resin window frame 2 and the metal support post 3 can move relatively left and right by the dimension of this horizontally elongated hole.

[0065] Therefore, the resin window frame 2 and the metal support 3 can move relatively left and right when the load of another resin window frame 2 above is applied or when shaking occurs due to an earthquake, etc., so that abnormal loads are not applied to the resin window frame 2 or the metal support 3, preventing distortion and damage.

[0066] The suction and drainage ropes 5 absorb infiltration water that seeps in from 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 gradually drips down the suction and drainage ropes 5 to 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 seeping in through the vertical and horizontal joints between the resin window frames 2 is drained downward through the water receiving groove 28 and the water intake and drainage rope 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-to-rear direction. In particular, the design of the multiple resin window frames 2 installed in the large opening O is important because they are visible to many people from outside. 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 achieved. 1. Since multiple resin window frames 2 with high thermal insulation performance can be used for the large opening O, the thermal insulation performance can be improved compared to conventional curtain wall structures with metal frames. 2. By supporting a plurality of resin window frames 2 arranged in line across the large opening O with a plurality of metal supports 3, the window can be strong enough to withstand wind pressure from outside. 3. By connecting the resin 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 resin window frame 2 and the metal support 3. 4. The thermal deformation absorbing joint mechanism 4 connects the resin window frame 2 and the metal support 3 so that they can move both vertically and horizontally, thereby enabling it to cope with deformation caused by the load on the resin window frame 2 from above and shaking caused by 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, metal support posts 3, etc. are made into vertically or horizontally elongated holes, which is a simple structure that allows movement in the vertical and horizontal directions. 6. The resin window frame 2 has reinforcing metal cores 23 built into each frame section 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 it is strong enough to withstand the load from other resin window frames 2 located above. 7. By lining up and fixing multiple resin window frames 2 vertically to form a unit and reinforcing the left and right lower corners of at least the lowest resin window frame 2 with L-shaped metal fittings 26, the labor required for installation at the construction site can be reduced, installation costs can be kept down, and installation errors can be reduced, stabilizing quality. 8. By embedding the water intake and drainage rope 5 in the water receiving groove 28 formed along the outer surface of the resin window frame 2, water seeping in from the vertical and horizontal joints between the resin window frames 2 can be absorbed by the water intake and drainage rope 5 and then appropriately dripped down into the water receiving groove 28 of the resin window frame 2 below, thereby reliably preventing internal water leakage into the room. 9. The connecting plates 6 can connect adjacent resin window frames 2 at predetermined positions, allowing for the construction of a highly aesthetically pleasing wall surface W.

[0070] The large-opening curtain wall window structure according to the present invention is not limited to the above-described 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) into which glass panes G are fitted and which cannot be opened or closed, but the present invention is not limited to this and may also be used as a window frame for an openable window such as a single-hung window, a casement window, or a tilt-down window. [Explanation of symbols]

[0071] 1. Large opening curtain wall window structure 2. Resin window frames 2U resin window frame unit 3 Metal Supports 4. Thermal deformation absorbing joint mechanism 5. Intake 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 support side 43 Zipper 44 Sealant 411 Window side fixing part 412 Convex part 413 Window side insertion hole 421 Bottom 422 Clamping part 423 Recess 424 Support side insertion hole 425 Joint connection insertion hole W wall O Large opening G Glass plate

Claims

1. A curtain wall window structure for large openings in which multiple glass plates are installed in a large opening in a wall of a building, a plurality of resin window frames that hold the glass plates and are arranged side by side in the vertical and horizontal directions relative to the large opening; a plurality of metal supports erected on the indoor side of the building of the large opening, The vertical joints between the resin window frames arranged side by side on the left and right and the metal supports are connected by a thermal deformation absorbing joint mechanism that absorbs differential deformation due to thermal deformation.

2. 2. A curtain wall-type window structure for large openings as described in claim 1, wherein the thermal deformation absorbing joint mechanism is 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 relatively in the front-to-back direction.

3. The thermal deformation absorbing joint mechanism is A window-side convex joint portion that is installed so as to be movable in the up and down direction at the vertical joint portion of the resin window frame; a support-side concave joint portion that is installed on the metal support so as to be movable in the left-right direction, 3. A curtain wall-type window structure for large openings as described in claim 2, wherein the window-side convex joint portion and the support-side concave joint portion are connected to each other so that they can move vertically with each other in a state where their respective convex portions and concave portions are combined.

4. The resin window frame is The reinforcing metal core is made of metal and has an outer surface 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, the outer surface of which is made of a resin material; 4. A curtain wall-type window structure for large openings as described in any one of claims 1 to 3, wherein 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 resin window frame.

5. A curtain wall-type resin window structure for large openings as described in claim 4, wherein in a resin window frame unit in which multiple 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.

6. 4. A curtain wall window structure for large openings according to claim 1, wherein a concave water-receiving groove is formed in the resin window frame along the outer periphery, and a drainage rope is embedded in the water-receiving groove to absorb water seeping in from the vertical and horizontal joints between the resin window frames and to drain the water by dripping it into the water-receiving groove of the resin window frame below.

7. A curtain wall-type resin window structure for large openings as described in any one of claims 1 to 3, 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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