Vent sash unit and manufacturing method thereof

Abstract

Stabilizes the ability of the vent sash unit to follow inter-story displacement. [Solution] The vent sash unit 10 comprises a glass plate 12, a support frame 20 supporting each side of the glass plate 12, and a holding frame 30 having a mounting surface 30a to which the support frame 20 is attached, and the mounting surface 30a of the holding frame 30 is provided with at least two planes S1, S2 that intersect at a predetermined angle, and the glass plate 12 is held in a curved state in the portion between the portion supported by the support frame 20 along one of the two planes, plane S1, and the portion supported by the support frame 20 along the other of the two planes, plane S2.

Description

[Technical field]

[0001] The present invention relates to a vent sash unit and a method for manufacturing a vent sash unit. [Background technology]

[0002] Patent Document 1 discloses a method for constructing a three-dimensional curved facade by curving a sash unit having a glass plate and an aluminum frame supporting the glass plate. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-155975 Summary of the Invention [Problem to be solved by the invention]

[0004] In the invention described in Patent Document 1, in order to construct a three-dimensional curved façade, sash units that are made up of glass sheets and aluminum frames and formed into flat plates with a mainly rectangular layout are forcibly bent and attached to the building frame at the construction site. However, because the stress (restoring force) generated by bending the sash unit continues to act on the fastener metal fittings provided to hold the sash unit to the building frame, the sash unit cannot normally follow inter-story displacement caused by, for example, an earthquake, and as a result, there is a risk that the sash unit will be damaged by the inter-story displacement.

[0005] An object of the present invention is to stabilize the ability of a vent sash unit to follow inter-story displacement. [Means for solving the problem]

[0006] The present invention provides a vent sash unit for holding a glass sheet curved by cold bending, the vent sash unit comprising: a glass sheet having at least four sides; a support frame for supporting each side of the glass sheet; and a holding frame having an attachment surface to which the support frame is attached. The holding frame is formed by joining the end faces of the members constituting the frame body in surface contact with the other members constituting the frame body at all joints that join the members constituting the frame body, The mounting surface of the holding frame has at least two planes that intersect at a predetermined angle before the glass plate is attached to the mounting surface via the support frame, and the glass plate is held in a curved state in a portion between the portion supported by the support frame along one of the two planes and the portion supported by the support frame along the other of the two planes.

[0007] The present invention also provides a manufacturing method for a vent sash unit that holds a glass plate curved by cold bending, the method including: an assembly process for assembling a holding frame; an attachment process for attaching a first support member to an attachment surface of the holding frame; and a glass plate supporting process for clamping and supporting each edge of a glass plate having at least four edges curved by cold bending between the first support member and the second support member by assembling a second support member to the first support member, wherein the attachment surface of the holding frame has at least two planes that intersect at a predetermined angle; and in the glass plate supporting process, the glass plate is supported in a curved state in a portion between a portion supported along one of the two planes by the first support member and the second support member and a portion supported along the other of the two planes by the first support member and the second support member. Effect of the Invention

[0008] According to the present invention, it is possible to stabilize the ability of the vent sash unit to follow inter-story displacement. [Brief description of the drawings]

[0009] [Figure 1] 1 is a diagram showing an example of a building to which a vent sash unit according to an embodiment of the present invention is attached. [Diagram 2]1 is a diagram showing an example of a vent sash unit according to an embodiment of the present invention; [Diagram 3] 3 is an enlarged cross-sectional view showing a cross section taken along line AA in FIG. 2. [Figure 4] 1A and 1B are diagrams illustrating an example of a holding frame of a vent sash unit. [Diagram 5] 10A and 10B are diagrams for explaining the angle of the mounting surface of the holding frame to which the support frame is attached. [Figure 6] 4 is a schematic diagram showing a state in which a support frame is attached to a holding frame. FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a vent sash unit and a manufacturing method thereof according to an embodiment of the present invention will be described with reference to the drawings.

[0011] The bent sash unit 10 according to an embodiment of the present invention holds a glass sheet 12 curved by cold bending, and constitutes the curtain wall of a building 1 having a three-dimensional curved facade as shown in FIG.

[0012] The vent sash unit 10 (hereinafter referred to as "unit 10") is manufactured in a factory by a manufacturing method described below, and then transported to the construction site of the building 1 and attached to the building frame (not shown) of the building 1 via fasteners (mounting hardware) of known structure, for example, by a locking method so as to be able to follow inter-story displacement. The method for following inter-story displacement is not limited to the locking method, and any method can be used as long as it is capable of absorbing the displacement of the unit 10 installed across the inter-story, for example, a sway method.

[0013] In this manner, the units 10 are successively attached by a so-called unit construction method to the framework of the building 1. Note that elastic seal materials (not shown) are appropriately provided between adjacent units 10 in the vertical and horizontal directions.

[0014] The units 10 are formed in different shapes depending on the location where they are attached, and for example, the units 10 labeled with reference numerals 10A and 10B attached to the same floor in Fig. 1 are formed in different external shapes as shown in (a) and (b) of Fig. 2. Fig. 2 is a view of the units 10A and 10B attached to the building 1 as viewed horizontally from outside the building 1.

[0015] In the example shown in FIG. 2, each of the units 10A and 10B has a trapezoid shape with the upper side and the lower side parallel to each other in the horizontal direction, and the vertical height VH1 of each of the units 10A and 10B is the same. In this way, by making the units 10 installed on the same floor have a trapezoid shape with the same vertical height, it becomes possible to easily install the units 10 to the frame even if the units 10 have different shapes. Note that the shape of each unit 10 in the horizontal direction is not limited to a trapezoid shape, and may be a simple quadrangle shape having four vertices and four sides, a so-called convex quadrangle shape, but from the viewpoint of ease of installation, it is preferable that the units 10 have the same trapezoid shape in the vertical direction. Note that in order to further improve ease of installation, the shapes of each unit 10 in the horizontal direction may all be the same rectangular shape.

[0016] The glass sheet 12 held by the unit 10 is cold-bent as described below, and then supported by the frame 14 in a curved state around a diagonal 14a of the frame 14. In the example shown in Fig. 2, the glass sheet 12 of the unit 10A shown in (a) is curved around a diagonal 14a extending from the upper left to the lower right of the frame 14, and the glass sheet 12 of the unit 10B shown in (b) is curved around a diagonal 14a extending from the upper right to the lower left of the frame 14. Note that the glass sheet 12 is not bent by forming a fold line at a portion corresponding to the diagonal 14a, but is accommodated within the frame 14 in a curved and deformed state by forming a hyperbolic paraboloid around the diagonal 14a.

[0017] In addition, the degree and direction of curvature of the glass plate 12 (whether it is curved convexly toward the outside of the building 1 or concavely toward the outside of the building 1) can be made different for each unit 10, as described below. For example, in the example shown in FIG. 2(a), the glass plate 12 is curved around a diagonal 14a extending from the upper left to the lower right of the frame 14, but it is also possible for it to be curved around a diagonal extending from the upper right to the lower left of the frame 14. In the example shown in FIG. 2(b), the glass plate 12 is curved around a diagonal 14a extending from the upper right to the lower left of the frame 14, but it is also possible for it to be curved around a diagonal extending from the upper right to the lower right of the frame 14.

[0018] In this way, it is possible to make the external shape of each unit 10 different, and the curvature of the glass panel 12 can be set relatively freely for each unit 10, so that facades with more complex three-dimensional curved surfaces can be easily realized by combining multiple units 10.

[0019] Next, a specific configuration of the unit 10 will be described with reference to FIGS.

[0020] FIG. 3 is an enlarged cross-sectional view of the unit 10 taken along line AA in FIG. 2(a) showing the unit 10 attached to the building 1. As shown in FIG.

[0021] As shown in Figure 3, the unit 10 comprises a glass plate 12 and a frame 14 that holds the glass plate 12, and the frame 14 is mainly composed of a support frame 20 that supports each side of the glass plate 12 via spacer rubbers 41, 42, and a holding frame 30 having a mounting surface 30a to which the support frame 20 is attached.

[0022] The glass sheet 12 is a laminated glass, and in a flat state before being curved by cold bending (cold bending), it is formed into a quadrangle shape having four vertices and four sides, that is, a so-called convex quadrangle shape. Specifically, the shape of the glass sheet 12 before cold bending is designed on the assumption that the shape viewed from the horizontal direction will be approximately trapezoidal when a unit 10 that holds the glass sheet 12 after cold bending is attached to a building 1 as shown in Fig. 2. In other words, the glass sheet 12 is not formed into a trapezoid shape at the stage before cold bending, but is formed into a shape that becomes approximately trapezoidal when viewed from the horizontal direction when it is curved along the frame 14 and accommodated in the frame 14.

[0023] The glass plate 12 is not limited to laminated glass, and may be single-pane glass, but laminated glass is preferable from the viewpoint of strength. The glass plate 12 may be double-glazed glass, but when the degree of curvature of the double-glazed glass increases, gaps may form in the sealed portion, and outside air may enter the hollow layer. Therefore, it is preferable to use laminated glass to increase the degree of curvature. The glass plate 12 is not limited to transparent glass, and may be mirror glass or heat-reflecting glass having both transmission and reflection functions. Instead of the glass plate 12, a plate-like member that is generally used as a surface material may be held by the frame 14.

[0024] The holding frame 30 is a steel frame composed of four straight rectangular timbers 31, 32, 33, 34 made of stainless steel or carbon steel, and as shown in Fig. 4, the first holding member 31 and the third holding member 33, which form the vertical frames, are bolted vertically to the second holding member 32 and the fourth holding member 34, which form the horizontal frames, via bolts not shown. Note that the fitting of the holding frame 30 is not limited to vertical fitting, and may be horizontal fitting.

[0025] The joining method is not limited to bolt joining, and may be welding joining. Each of the holding members 31, 32, 33, 34 may be either a solid square timber or a hollow square timber, but the first holding member 31 and the third holding member 33, which are vertical frames to which fasteners (mounting hardware) for attaching to the framework of the building 1 are fixed, are preferably solid square timber. If they are made of carbon steel, they are coated with an anti-rust paint after joining.

[0026] Each of the holding members 31, 32, 33, 34 has a mounting surface 31a, 32a, 33a, 34a to which the support frame 20 is attached, and one end 32b of the second holding member 32 is joined to one end 31b of the first holding member 31 so that the mounting surface 31a of the first holding member 31 and the mounting surface 32a of the second holding member 32 are located on the same first plane S1, and one end 34b of the fourth holding member 34 is joined to one end 33b of the third holding member 33 so that the mounting surface 33a of the third holding member 33 and the mounting surface 34a of the fourth holding member 34 are located on the same second plane S2. Note that the mounting surfaces 31a, 32a, 33a, 34a are all flat surfaces without twisting.

[0027] Also, the other end 34c of the fourth holding member 34 and the other end 32c of the second holding member 32 are joined to the other end 31c of the first holding member 31 and the other end 33c of the third holding member 33, respectively, such that the first plane S1 (mounting surfaces 31a, 32a) and the second plane S2 (mounting surfaces 33a, 34a) intersect at the predetermined angles α1, α2 as shown in Fig. 5. As a result, the mounting surface 30a of the holding frame 30 is provided with two planes S1, S2 that intersect at the predetermined angles α1, α2.

[0028] Figure 5 is a diagram showing the relationship between the mounting surfaces 31a, 32a, 33a, 34a of each retaining member 31, 32, 33, 34 when viewed from a direction along diagonal line L of retaining frame 30, which is the line segment (shown by a dotted line in Figure 4) connecting the point where the inner end line of the mounting surface 31a of the first retaining member 31 intersects with the inner end line of the mounting surface 34a of the fourth retaining member 34 and the point where the inner end line of the mounting surface 33a of the third retaining member 33 intersects with the inner end line of the mounting surface 32a of the second retaining member 32. The first plane S1 is a surface formed by three straight lines: the inner end line of the mounting surface 31a of the first retaining member 31, the inner end line of the mounting surface 34a of the fourth retaining member 34, and the diagonal line L, and the second plane S2 is a surface formed by three straight lines: the inner end line of the mounting surface 33a of the third retaining member 33, the inner end line of the mounting surface 32a of the second retaining member 32, and the diagonal line L.

[0029] Figure 5(a) shows a state in which the first plane S1 and the second plane S2 intersect at a predetermined angle α1 that is convex toward the mounting surfaces 31a, 32a, 33a, and 34a, and Figure 5(b) shows a state in which the first plane S1 and the second plane S2 intersect at a predetermined angle α2 that is concave toward the mounting surfaces 31a, 32a, 33a, and 34a.

[0030] The magnitudes of the angles α1 and α2 at which the first plane S1 and the second plane S2 intersect correspond to the degree of curvature and the curvature direction (whether the glass plate 12 is curved convexly toward the outside of the building 1 or curved concavely toward the outside of the building 1) of the glass plate 12 held by the frame 14, and the curvature state of the glass plate 12 can be arbitrarily changed by changing the magnitudes of the angles α1 and α2. Note that the glass plate 12 is not bent by forming a fold line at a portion corresponding to the diagonal line L, but is curved by forming a hyperbolic paraboloid around the diagonal line L, as shown by the dashed lines in (a) and (b) of FIG. 5. The dashed lines in (a) and (b) of FIG. 5 show an image of the curved and deformed state of the glass plate 12 when the glass plate 12 is supported by the support frames 21, 22, 23, and 24 in a glass plate supporting step described later.

[0031] The angles α1, α2 formed by the first plane S1 and the second plane S2 can be changed by changing the angle at which the end face of the second retaining member 32, which is a horizontal frame that contacts the third retaining member 33, which is a vertical frame, is cut, and the angle at which the end face of the fourth retaining member 34, which is a horizontal frame that contacts the first retaining member 31, which is a vertical frame, is cut.

[0032] In addition, the joints between the first retaining member 31 and the second retaining member 32 and the joints between the third retaining member 33 and the fourth retaining member 34 do not need to be right-angle joints, and the shape of the unit 10 when attached to the building 1 when viewed horizontally can be changed by changing the angle at which the end face of the second retaining member 32, which is a horizontal frame that contacts the first retaining member 31, which is a vertical frame, is cut, and the angle at which the end face of the fourth retaining member 34, which is a horizontal frame that contacts the third retaining member 33, which is a vertical frame, is cut.

[0033] In other words, by appropriately changing the angles of both end faces of the second retaining member 32 and the fourth retaining member 34, which form the horizontal frames, it is possible to change not only the curvature of the glass plate 12 but also the shape of the unit 10.As described above, the shape of the unit 10 when viewed horizontally can be a trapezoid with parallel upper and lower edges or a convex quadrilateral, that is, any shape.

[0034] In addition, the first holding member 31 and the third holding member 33, which are vertical frames, have fixing surfaces 31d, 33d, to which fasteners (mounting hardware) for mounting to the building frame of the building 1 are fixed, on the opposite side of the mounting surfaces 31a, 33a. In order to improve the ease of mounting the unit 10 to the building frame, it is preferable to form the fixing surfaces 31d, 33d on each holding member 31, 33 so that the fixing surface 31d of the first holding member 31 and the fixing surface 33d of the third holding member 33 are located on the same plane. In other words, the mounting surface 31a of the first holding member 31 and the fixing surface 31d do not need to be parallel, and the mounting surface 33a of the third holding member 33 do not need to be parallel to the fixing surface 33d.

[0035] The support frame 20 is a metallic frame body composed of four linearly formed support frames 21, 22, 23, 24 attached to the respective holding members 31, 32, 33, 34, and is made of a metal having lower rigidity than the holding frame 30, such as an aluminum alloy. Note that the support frame 20 is not limited to being made of an aluminum alloy, and may be made of other non-ferrous metal materials or may be made of steel like the holding frame 30, but from the viewpoint of weight reduction, it is preferable that the support frame 20 be made of a non-ferrous metal such as an aluminum alloy.

[0036] 3, each of the support frames 21, 22, 23, and 24 constituting the support frame 20 has a first support member 20a attached to the mounting surface 30a of the holding frame 30, and a second support member 20b assembled to the first support member 20a. Note that the second support member 20b is a so-called ridge, and the first support member 20a is a so-called ridge receiver.

[0037] The first support member 20a has a fixing piece 20c extending along the mounting surface 30a of the holding frame 30, and an engaged piece 20d extending from the fixing piece 20c to the opposite side of the holding frame 30 when attached to the holding frame 30, and is attached to the holding frame 30 by fixing the fixing piece 20c to the holding frame 30 with a screw or the like (not shown).

[0038] The second support member 20b has a support piece 20e extending parallel to the fixed piece 20c when assembled to the first support member 20a, and an engagement piece 20f extending from the support piece 20e toward the fixed piece 20c, and is configured to be assembled to the first support member 20a by the engagement piece 20f engaging with the engaged piece 20d.

[0039] With the support frame 20 configured as above, the glass plate 12 is supported with the first spacer rubber 41 interposed between the fixed piece 20c and the glass plate 12, and the second spacer rubber 42 interposed between the fixed piece 20c and the support piece 20e, as shown in Fig. 3. The fixed piece 20c is provided with a holding portion (not shown) capable of holding the first spacer rubber 41 in a predetermined position, and the support piece 20e is provided with a holding portion (not shown) capable of holding the second spacer rubber 42 in a predetermined position.

[0040] The first spacer rubber 41 and the second spacer rubber 42 are sealing members made of ethylene propylene rubber or chloroprene rubber. The hardness of the first spacer rubber 41 and the second spacer rubber 42 may be constant, but the hardness may be partially changed depending on the magnitude of the load received from the curved glass plate 12. This makes it possible to reduce stress concentration on the glass plate 12 and reduce the risk of the glass plate 12 cracking or chipping.

[0041] In order to prevent the first spacer rubber 41 and the second spacer rubber 42 from deteriorating due to exposure to the outside air, a sealing material 44 is provided in the groove formed by the fixing piece 20c, the first spacer rubber 41, and the glass plate 12, and in the groove formed by the support piece 20e, the second spacer rubber 42, and the glass plate 12, so as to fill these grooves.

[0042] As shown in Fig. 6, the support frames 21, 22, 23, and 24 constituting the support frame 20 are attached to the holding frame 30 without contacting each other and with a predetermined gap G therebetween. Fig. 6 is a perspective view showing a schematic view for easy understanding of the attachment state of the support frames 21 and 24 to the holding frame 30. Note that Fig. 6 shows the attachment state of the first support member 21a of the first support frame 21 and the first support member 24a of the fourth support frame 24 at the joint between the first support member 31 and the fourth support member 34, but the first support members 21a, 22a, 23a, and 24a of the support frames 21, 22, 23, and 24 are attached to the holding frame 30 in the same manner.

[0043] Specifically, a gap G of a predetermined size is formed between the first support member 21a of the first support frame 21 attached to the first holding member 31 and the first support member 22a of the second support frame 22 attached to the second holding member 32, and a sealing member (not shown) is provided in this gap G. Note that as the sealing member, a liquid sealing material that is filled in the gap G may be used.

[0044] Similarly, sealing members are also provided in the gaps G formed between the first support member 22a of the second support frame 22 attached to the second retaining member 32 and the first support member 23a of the third support frame 23 attached to the third retaining member 33, between the first support member 23a of the third support frame 23 attached to the third retaining member 33 and the first support member 24a of the fourth support frame 24 attached to the fourth retaining member 34, and between the first support member 24a of the fourth support frame 24 attached to the fourth retaining member 34 and the first support member 21a of the first support frame 21 attached to the first retaining member 31.

[0045] By providing sealing members between the support frames 21, 22, 23, and 24 in this manner, rainwater and the like are prevented from entering the interior of the building 1 through the gaps G.

[0046] If the unit 10 having the above configuration is tilted inward with its upper side recessed further into the interior of the building 1 than its lower side, as shown in Figure 3, when condensation occurs on the steel supporting frame 30, the condensed water may drip onto the floor surface.

[0047] For this reason, a gutter member 50 formed in a shape capable of receiving and collecting condensation water is provided below the holding frame 30. The condensation water collected by the gutter member 50 is guided to a condensation receiver provided on the lower frame or the like through a water guide route (not shown) connected to the gutter member 50. It is preferable that the gutter member 50 is provided not only on the holding frame 30 on the upper side of the unit 10, but also below the holding frame 30 on the lower side. Note that when the unit 10 is in an outwardly leaning state and there is little risk of condensation water dripping onto the floor surface, the gutter member 50 does not need to be provided.

[0048] Next, a method for manufacturing the unit 10 having the above configuration will be described with reference to FIGS.

[0049] First, the holding frame 30 is assembled (assembly process).

[0050] As described above, the holding frame 30 is assembled by joining the first holding member 31 and the third holding member 33, which form the vertical frames, to the second holding member 32 and the fourth holding member 34, which form the horizontal frames, via bolts (not shown). Note that both end portions of the second holding member 32 and the fourth holding member 34 are cut so that the angles formed by the first plane S1 (mounting surfaces 31a, 32a) and the second plane S2 (mounting surfaces 33a, 34a) of the assembled holding frame 30 become predetermined angles α1, α2 that have been set in advance.

[0051] Next, the first support members 21a, 22a, 23a, and 24a of the respective support frames 21, 22, 23, and 24 are attached to the holding frame 30 (attaching step).

[0052] In this process, the first support members 21a, 22a, 23a, 24a of each support frame 21, 22, 23, 24 are attached to the mounting surfaces 31a, 32a, 33a, 34a of each holding member 31, 32, 33, 34 via screws not shown, and gaps G formed between adjacent first support members 21a, 22a, 23a, 24a are sealed by sealing members not shown.

[0053] Next, the glass plate 12 is supported by the first supporting members 21a, 22a, 23a, and 24a and the second supporting members 21b, 22b, 23b, and 24b attached to the holding frame 30 (glass plate supporting step).

[0054] In this process, first, a first spacer rubber 41 is placed on the first support members 21a, 22a, 23a, and 24a attached to the holding frame 30, then a glass plate 12 is placed on the first spacer rubber 41, and then a second spacer rubber 42 is placed on the glass plate 12.

[0055] Then, the second support members 21b, 22b are assembled to the first support members 21a, 22a which are respectively attached to the mounting surface 31a of the first retaining member 31 and the mounting surface 32a of the second retaining member 32 which constitute the first plane S1, with the first spacer rubber 41, the glass plate 12 and the second spacer rubber 42 sandwiched between the first support members 21a, 22a and the second support members 21b, 22b.

[0056] In this manner, with two edges of the glass plate 12 supported by the first support frame 21 and the second support frame 22 and the glass plate 12 aligned along the first plane S1, the remaining two edges of the glass plate 12 are pressed toward the mounting surface 33a of the third retaining member 33 and the mounting surface 34a of the fourth retaining member 34, which constitute the second plane S2, so that the glass plate 12 is curved around the diagonal line L of the retaining frame 30.

[0057] Then, the second support members 23b, 24b are assembled to the first support members 23a, 24a, which are respectively attached to the mounting surface 33a of the third retaining member 33 and the mounting surface 34a of the fourth retaining member 34, which constitute the second plane S2, with the first spacer rubber 41, the glass plate 12 and the second spacer rubber 42 sandwiched between the first support members 23a, 24a and the second support members 23b, 24b.

[0058] As a result, each side of the glass plate 12 is supported by each support frame 21, 22, 23, 24, and the glass plate 12 is supported by the support frame 20 in a curved state in the portion between the portion supported along the first plane S1 (one plane) by the first support members 21a, 22a and the second support members 21b, 22b of the first support frame 21 and the second support frame 22, and the portion supported along the second plane S2 (the other plane) by the first support members 23a, 24a and the second support members 23b, 24b of the third support frame 23 and the fourth support frame 24, i.e., in a curved state in which a convex or concave hyperbolic paraboloid is formed around the diagonal L of the holding frame 30, as shown by the dashed line in Figure 5.

[0059] In the above glass plate supporting process, the procedure for supporting the glass plate 12 is not limited to the above procedure, and it is sufficient that, when the glass plate 12 is in a cold-vented state, the four sides of the glass plate 12 are supported by the first supporting members 21a, 22a, 23a, 24a and the second supporting members 21b, 22b, 23b, 24b. For example, one side of the glass plate 12 may be supported first and then the remaining three sides, or all four sides of the glass plate 12 may be supported simultaneously.

[0060] Then, when support of the glass plate 12 by the first support members 21a, 22a, 23a, 24a and the second support members 21b, 22b, 23b, 24b is completed, gaps formed between adjacent second support members 21b, 22b, 23b, 24b and gaps into which rainwater, etc. may enter are sealed with a sealing member, and the unit 10 is completed.

[0061] The units 10 thus manufactured in a factory or the like are delivered to the construction site of the building 1, and are sequentially attached to the building frame of the building 1 by the unit construction method. If the units 10 are transported in a direction different from the attached state, for example, standing horizontally, the load may become unstable, and the direction of the weight of the glass plate 12 acting on the glass plate 12 is perpendicular to the direction when the glass plate 12 is attached to the building 1, and the position of the glass plate 12 may shift within the unit 10 due to its own weight, causing the glass plate 12 to break. Therefore, the units 10 are transported in a flat state. It is also possible to transport the units 10 in the same state as the attached state, that is, standing vertically. However, if the units 10 are transported in such a state, the height of the load may exceed the height limit of the transport vehicle, and the load may become unstable due to the higher center of gravity of the load, which is not practical. Therefore, it is preferable that the units 10 are transported in a flat state.

[0062] According to the above embodiment, the following effects are achieved.

[0063] According to the vent sash unit 10 and the manufacturing method for the vent sash unit 10 configured as described above, the stress (restoring force) generated in the glass plate 12 curved by cold bending (cold bending) acts on the retaining frame 30 via the support frame 20. However, since the retaining frame 30 is made of steel having a relatively high rigidity, the deformed state of the glass plate 12 is retained by the retaining frame 30, and the stress generated in the glass plate 12 is prevented from acting on the fasteners (mounting hardware) for attaching the unit 10 to the structure of the building 1.

[0064] In this way, the unit 10 holds the glass plate 12 curved by cold bending, but the structure is such that the stress generated in the glass plate 12 does not act on the outside of the unit 10, and therefore does not affect the function of the fasteners used to attach the unit 10 to the framework of the building 1. This makes it possible to stabilize the ability of the unit 10 to follow inter-story displacement caused by earthquakes, etc.

[0065] Moreover, the unit 10 having the above configuration can be manufactured in a factory or the like, and after being manufactured, it is transported to the construction site of the building 1 and sequentially attached to the framework of the building 1 by a unit construction method. Therefore, the work time required to attach the glass sheet 12 curved by cold bending can be significantly shortened compared to the case where the work of cold bending the glass sheet by a predetermined amount and attaching the glass sheet in a further bent state to the framework is performed on-site at the construction site.

[0066] In addition, when a unit in which a glass sheet and an aluminum frame are integrated is bent by a predetermined amount at a construction site to attach a glass sheet curved by cold bending to a building frame, the restoring force of the glass sheet continues to act on the joints of the frame that are bent in the same way as the glass sheet, and there is a risk that the joints of the bent parts will open and rainwater, etc. will enter, so the amount of bending of the glass sheet is significantly restricted. In contrast, in the unit 10 with the above configuration, the aluminum support frame 20 that supports the glass sheet 12 curved by cold bending does not have a part that is bent in response to the curvature of the glass sheet 12 and is composed of members formed in a straight line, so that the stress generated in the glass sheet 12 does not act locally on the support frame 20. Therefore, it is possible to make the degree of curvature of the glass sheet 12 relatively large depending on the stress of the glass sheet 12 itself, rather than on the strength of the joints of the frame, etc.

[0067] In addition, in order to facilitate the attachment of the units 10 to the building structure 1 and the manufacture of the units 10, it is possible to adopt a rectangular layout in which the shapes of all the units 10 in the horizontal view are the same rectangular shape, but it is difficult to realize a complex facade with a rectangular layout. In addition, in a unit in which a glass plate and an aluminum frame are integrated, if the joint of the frame is at an angle other than a right angle, the structure of the joint becomes complicated and it is difficult to ensure the strength of the joint, so it is difficult to adopt an layout other than a rectangular layout. In contrast, in the unit 10 with the above configuration, the shape of each unit 10 in the horizontal view can be a trapezoid or a convex square, that is, any shape, and the layout dimensions can be freely set, so it is possible to realize a facade with a more complex three-dimensional curved surface.

[0068] In addition, the following modified examples are also within the scope of the present invention, and it is possible to combine the configurations shown in the modified examples with the configurations described in the above-mentioned embodiments, or to combine the configurations described in the different modified examples below.

[0069] In the above embodiment, the holding frame 30 is composed of four holding members 31, 32, 33, and 34, and the shape of the glass plate 12 held by the unit 10 is a convex quadrangle having four sides. Alternatively, the shape of the glass plate 12 held by the unit 10 may be a pentagonal or other polygonal shape having four or more sides, in which case the holding frame 30 is composed of holding members the number of which matches the shape of the glass plate 12. Note that when the shape of the glass plate 12 is a polygonal shape having pentagons or other polygonal shapes, it is not limited to a convex polygonal shape, and may be a concave polygonal shape with a portion concave.

[0070] For example, if the shape of the glass plate 12 held by the unit 10 is a convex pentagon, the holding frame 30 will be composed of five holding members, and the mounting surface of the holding frame 30 will have two or three planes that intersect at a predetermined angle.

[0071] Specifically, if a first plane is formed by the mounting surfaces provided on two adjacent retaining members and a second plane is formed by the mounting surfaces provided on the remaining three retaining members, the two planes will intersect at a predetermined angle, and if a first plane is formed by the mounting surfaces provided on two adjacent retaining members, a second plane is formed by the mounting surfaces provided on another two adjacent retaining members, and a third plane is formed by the mounting surface provided on the remaining retaining member, the three planes will intersect at a predetermined angle.

[0072] When the two planes intersect at a predetermined angle, the glass plate 12 is held in a curved state in the portion between the portion supported by the support frame 20 along the first plane and the portion supported by the support frame 20 along the second plane, and when the three planes intersect at a predetermined angle, the glass plate 12 is curved in the portion between the portion supported by the support frame 20 along the first plane and the portion supported by the support frame 20 along the third plane, and is held in a curved state in the portion between the portion supported by the support frame 20 along the second plane and the portion supported by the support frame 20 along the third plane.

[0073] Even when the shape of the glass plate 12 is a polygon having pentagons or more sides, the glass plate 12 is held in a curved state in the portion between the portion supported by the support frame 20 along a certain plane and the portion supported by the support frame 20 along another plane adjacent to the first plane, as in the above embodiment.

[0074] Although the embodiments of the present invention have been described above, the above-mentioned embodiments merely show some of the application examples of the present invention, and it is not intended that the technical scope of the present invention be limited to the specific configurations of the above-mentioned embodiments. [Explanation of symbols]

[0075] 10, 10A, 10B... Vent sash unit 1...Buildings 12. Glass plate 20... Support frame 21... First support frame (support frame) 22...Second support frame (support frame) 23...Third support frame (support frame) 24...Fourth support frame (support frame) 20a, 21a, 22a, 23a, 24a... First support member 20b, 21b, 22b, 23b, 24b... Second support member 30... Holding frame 31... First holding member 32...Second holding member (12) 33...Third holding member (15) 34...Fourth holding member (14) 30a, 31a, 32a, 33a, 34a...Mounting surface 31b, 32b, 33b, 34b...One end 31c, 32c, 33c, 34c...Other end 41... First spacer rubber 42 Second spacer rubber S1...1st plane S2...Second plane L diagonal

Claims

1. A vent sash unit that holds a glass sheet curved by cold bending, The glass plate having at least four sides; A support frame for supporting each side of the glass plate; a holding frame having a mounting surface to which the support frame is attached; the holding frame is formed by joining end faces of the members constituting the frame body to other members constituting the frame body in a surface-to-surface contact state at all joints that join the members constituting the frame body, the mounting surface of the holding frame is provided with at least two flat surfaces that intersect at a predetermined angle before the glass plate is attached to the mounting surface via the support frame; the glass plate is held in a curved state at a portion between a portion supported by the support frame along one of the two planes and a portion supported by the support frame along the other of the two planes; Vent sash unit.

2. The mounting surface of the holding frame is provided with two planes, namely, a first plane and a second plane intersecting the first plane at the predetermined angle, the holding frame has a first holding member, a second holding member, a third holding member, and a fourth holding member that are formed in a linear shape, One end of the second holding member is joined to one end of the first holding member such that the mounting surface of the first holding member and the mounting surface of the second holding member are positioned on the first plane, one end of the fourth holding member is joined to one end of the third holding member such that the mounting surface of the third holding member and the mounting surface of the fourth holding member are positioned on the second plane, The other end of the fourth holding member and the other end of the second holding member are joined to the other end of the first holding member and the other end of the third holding member, respectively, such that the first plane and the second plane intersect at the predetermined angle. The vent sash unit according to claim 1 .

3. the support frame includes a first support frame attached to the first holding member, a second support frame attached to the second holding member, a third support frame attached to the third holding member, and a fourth support frame attached to the fourth holding member, the first support frame, the second support frame, the third support frame, and the fourth support frame are formed in a straight line and are attached to the holding frame without contacting each other; a seal member is provided in each of gaps formed between the first support frame and the second support frame, between the second support frame and the third support frame, between the third support frame and the fourth support frame, and between the fourth support frame and the first support frame; The vent sash unit according to claim 2.

4. the support frame is made of steel; The support frame is made of a metal having a lower rigidity than the holding frame. The vent sash unit according to any one of claims 1 to 3.

5. A method for manufacturing a vent sash unit that holds a glass sheet curved by cold bending, comprising the steps of: an assembly process of assembling a holding frame; a mounting step of mounting a first support member on a mounting surface of the holding frame; a glass plate supporting step of supporting each side of the glass plate having at least four sides curved by cold bending by sandwiching the sides between the first support member and the second support member by assembling a second support member to the first support member, The mounting surface of the holding frame is provided with at least two planes intersecting at a predetermined angle, In the glass plate supporting step, the glass plate is supported in a curved state at a portion between a portion supported by the first support member and the second support member along one of the two planes and a portion supported by the first support member and the second support member along the other of the two planes. A manufacturing method for a vent sash unit.

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