Cold vent glass unit and cold vent construction method

Abstract

To provide a cold bent glass unit and a cold bending method not obstructing bending of a glass plate through a cold bending method even when the glass plate is supported on a frame.SOLUTION: A cold bent glass unit 1 comprises: a rectangular glass plate 2; a bent corner part 2a on which force is applied in a force applied direction P through a cold bending method, being one of corners of the glass plate 2; a diagonal corner part 2b positioned diagonally to the bent corner part 2a in the force applied direction P upon force application on the bent corner part 2a; bent edges 5 to be bent through the cold bending method, being edges of the glass plate 2 adjacent to the diagonal corner part 2b; and a support frame 3 covering a circumference of the glass plate 2 and supporting it, wherein an intermediate material 4 is placed between the frame 3 and the glass plate 2, and the intermediate material 4 placed between the bent edges 5 and the frame 3 and on a near side of the force applied direction P is formed of a low elastic modulus body with an elastic modulus allowing deformation corresponding to deformation of the glass plate 2.SELECTED DRAWING: Figure 12

Description

[Technical Field]

[0001] The present invention relates to a cold bent glass unit and a cold bent construction method for bending glass without applying heat and installing it on the exterior wall of a building or the like. [Background technology]

[0002] A cold bent construction method is known in which glass sheets are attached to the building frame on-site, either together with the sash (frame) or by twisting (bending) the glass sheets alone little by little (see, for example, Patent Document 1). Patent Document 1 describes that the glass sheets that will be the face material of the unit curtain wall may be supported by a frame. When supported by a frame, the glass sheets are deformed together with the frame. [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] However, when a framed glass sheet is used as cold bent glass, the frame has a certain degree of rigidity, making it difficult for the frame to follow the bending of the glass sheet. This prevents the glass sheet from freely bending during cold bent construction, and causes excessive local tensile stress to be applied to the glass sheet, making the glass sheet more susceptible to cracking.

[0005] The present invention has been made in consideration of the above-mentioned conventional technology, and aims to provide a cold bent glass unit and a cold bent method in which, even if the glass sheet is supported by a frame, this does not interfere with the bending of the glass sheet using the cold bent method. [Means for solving the problem]

[0006] In order to achieve the above object, the present invention provides a cold bent glass unit including: a rectangular glass sheet; a bent corner that is one corner of the glass sheet and to which a force is to be applied in a force application direction by a cold bent method; a force application direction when a force is applied to the bent corner by the cold bent method; a diagonal corner that is another corner of the glass sheet diagonally opposite the bent corner; a warped edge that is an edge of the glass sheet adjacent to the diagonal corner and where warping is to occur by the cold bent method; two other corners other than the bent corner and the diagonal corner; and a frame that covers and supports a periphery of the glass sheet, wherein an intermediate material is interposed between the frame and the glass sheet, and the intermediate material, which is disposed between the warped edge and the frame on the front side of the force application direction, is formed of a low-elasticity body having an elastic modulus that enables it to deform in accordance with deformation of the glass sheet.

[0007] Preferably, the glass plate has opposing short and long sides, and at least one of the long sides is the warped side.

[0008] Preferably, the elastic modulus of the low elastic modulus body is lower than the elastic modulus of any of the intermediate materials arranged at all corners of the glass plate on the front side and the back side in the force application direction.

[0009] Preferably, the elastic modulus of the low elastic modulus body is lower than the elastic modulus of the intermediate material disposed at all corners of the glass plate on the front side and the back side in the force application direction.

[0010] Preferably, the low elastic modulus body has a lower elastic modulus than all of the intermediate members disposed on the far side in the force application direction.

[0011] Preferably, the elastic modulus of the low elastic modulus body is lower than the elastic modulus of the intermediate material disposed on the short side of the glass plate on the front side and the rear side in the force application direction.

[0012] Preferably, the elastic modulus of the low elastic modulus body is lower than the elastic modulus of the intermediate material disposed on the front and rear sides of the opposite side of the warped side in the force application direction.

[0013] Preferably, the elastic modulus of the low elastic modulus body is lower than the elastic modulus of the intermediate material disposed on the inner side of the warped edge in the force application direction.

[0014] Preferably, the bent corner portion is located further back in the force application direction than the diagonal corner portion and the two other corner portions, and the warped side is curved forward in the force application direction.

[0015] The present invention also provides a cold venting method, which is characterized by comprising: an assembly step of interposing the intermediate material between the frame and the glass plate; and a force application step of applying force to the vent corner portion in the force application direction to position the vent corner portion further back in the force application direction than the diagonal corner portion and the two other corner portions, and curving the warped edge toward the front side in the force application direction.

[0016] Preferably, in the force applying step, the diagonal corner is pressed from the front side in the force applying direction, and the bent corner and two other corners of the glass plate other than the diagonal corner are pressed from the rear side in the force applying direction. [Effects of the Invention]

[0017] According to the present invention, it is possible to provide a cold bent glass unit and a cold bent method in which, even if the glass sheet is supported by a frame, this does not hinder the application of force to the glass sheet in the cold bent method.

[0018] Furthermore, by forming the intermediate material arranged between the warped edge and the frame on the front side of the force application direction from a low elastic modulus body having an elastic modulus that can deform in accordance with the deformation of the glass plate, even if the warped edge warps towards the front side of the force application direction when force is applied to the vent corner by the cold vent method, the low elastic modulus body will absorb this and deform, so excessive stress will not be applied to the glass plate, and therefore cracks in the glass plate can be prevented.

[0019] Furthermore, when the glass plate has a rectangular shape (e.g., a rectangle, a parallelogram, or a trapezoid) having a short side and a long side, the long side generates greater stress, so by making this the warped side, the side that is subjected to greater stress can be effectively deformed.

[0020] Furthermore, by making the elastic modulus of the low elastic modulus body arranged on the front side of the warped edge in the force application direction lower than the elastic modulus of any or all of the bent corner, diagonal corner, and two other corners, that is, by using an intermediate material with a high elastic modulus at the corners of the glass plate, it is possible to prevent the glass plate from moving due to wind pressure within the frame.

[0021] Furthermore, by making the elastic modulus of the low elastic modulus body lower than the elastic modulus of all intermediate materials arranged on the rear side in the force application direction, intermediate materials with high elastic modulus are arranged on at least the entire surface on the rear side in the force application direction of the glass plate, which prevents the glass plate from moving when the cold bent glass unit is used on the exterior wall of a building, etc., and allows it to withstand wind pressure.

[0022] Furthermore, by making the elastic modulus of the low elastic modulus body lower than the elastic modulus of the intermediate material arranged on the short side when the glass plate is rectangular, it is possible to arrange intermediate materials with a high elastic modulus on at least the long side other than the warped side where warping occurs, so that when a cold bent glass unit is used on the exterior wall of a building, etc., the glass plate can be prevented from moving and can withstand wind pressure.

[0023] Furthermore, by making the elastic modulus of the low elastic modulus body lower than the elastic modulus of all intermediate materials arranged on all sides other than the front side of the warped edge in the force application direction, it is possible to arrange at least low elastic modulus bodies on the side of the warped edge where warping occurs, and to arrange intermediate materials with high elastic modulus on all other sides.This makes it possible to prevent the glass sheets from moving when a cold bent glass unit is used on the exterior wall of a building, etc., and to withstand the wind pressure.

[0024] Furthermore, according to the present invention, by applying force to the corners of the vent and warping the warped edges in the cold venting method, the generation of excessive stress in the glass sheet can be prevented, and the cold venting method can be performed efficiently.

[0025] Furthermore, when applying force to the vent corner, a moment acts on the diagonal corner toward the front of the force application direction, so by pressing this diagonal corner from the front of the force application direction, the vent corner can be applied efficiently. At the same time, a force acts on the other two corners toward the back of the force application direction, so by pressing these other two corners from the back of the force application direction, the vent corner can be applied even more efficiently. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a schematic perspective view of a cold bent glass unit according to the present invention. [Figure 2] 1 is a schematic cross-sectional view of the vicinity of a frame of a cold bent glass unit according to the present invention. [Figure 3] FIG. 1 is a schematic perspective view of a glass plate that has been subjected to a cold venting method. [Figure 4] FIG. 1 is a schematic perspective view showing an example of a glass plate on which an intermediate material is disposed. [Figure 5] FIG. 10 is a schematic perspective view showing another example of a glass plate having an intermediate material disposed therein. [Figure 6] FIG. 10 is a schematic perspective view showing yet another example of a glass plate having an intermediate material disposed thereon. [Figure 7] FIG. 10 is a schematic perspective view showing yet another example of a glass plate having an intermediate material disposed thereon. [Figure 8] FIG. 10 is a schematic perspective view showing yet another example of a glass plate having an intermediate material disposed thereon. [Figure 9] FIG. 10 is a schematic perspective view showing yet another example of a glass plate having an intermediate material disposed thereon. [Figure 10] FIG. 10 is a schematic perspective view showing yet another example of a glass plate having an intermediate material disposed thereon. [Figure 11] FIG. 10 is a schematic perspective view showing yet another example of a glass plate having an intermediate material disposed thereon. [Figure 12]FIG. 1 is a schematic perspective view of a cold vent glass unit that has been subjected to a cold venting method. [Figure 13] 13 is a cross-sectional view taken along the line AA in FIG. 12. [Figure 14] 13 is a cross-sectional view of FIG. 12 taken along line B-B. [Figure 15] 1 is a flowchart of a cold venting method according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0027] As shown in FIG. 1, a cold bent glass unit 1 according to the present invention includes a rectangular glass plate 2. The glass plate 2 may be any glass plate to which the cold bent method can be applied, including single-pane glass, laminated glass, and double-glazed glass. The periphery of the glass plate is covered and supported by a metal frame 3. The frame 3 is made of, for example, aluminum. As shown in FIG. 2, the frame 3 does not directly sandwich the glass plate 2; instead, an intermediate member 4 is interposed between the frame 3 and the glass plate 2. The intermediate member 4 is disposed on both sides of the glass plate 2. The intermediate member 4 is called a backup material, gasket, or seal, and is made of rubber (such as EPDM or chloroprene rubber) or a sponge. Covering the glass plate 2 with the frame 3 ensures watertightness.

[0028] As shown in FIG. 3, when the cold venting method is performed, the glass sheet 2 is twisted or bent. Specifically, in the cold venting method, a bent corner 2a, which is one corner of the glass sheet 2, is applied (by pressing or pulling) in a force application direction P, and the bent corner 2a is moved toward the rear of the force application direction P. The dotted line in the figure shows the glass sheet 2 in a state before the force is applied. Diagonally opposite the bent corner 2a is a diagonal corner 2b, which is another corner of the glass sheet 2. The edge of the glass sheet 2 adjacent to the diagonal corner 2b, which has been warped by the cold venting method, is designated as the warped edge 5. If the glass sheet 2 is square in plan view, the warped edge 5 could be the two edges adjacent to the diagonal corner 2b. However, if the glass sheet 2 is rectangular as shown in the figure, the long edge is the warped edge 5. The direction in which the warp of the warped edge 5 occurs is toward the front side of the force application direction P. The two corners of the glass plate 2 other than the bent corner 2a and the diagonal corner 2b are other corners 2c. As described above, as a result of the movement of the bent corner 2a by the cold venting method, the bent corner 2a is positioned further back in the force application direction P than the diagonal corner 2b and the two other corners 2c. However, depending on how it is expressed, it can also be said that the bent corner 2a is bent back in the force application direction P.

[0029] The intermediate material 4 interposed between the glass sheet 2 and the frame 3 is formed of a low-elasticity body 6 having an elastic modulus that allows it to deform in response to the deformation of the glass sheet 2. In the example shown in FIG. 4, the intermediate material 4 arranged around the entire periphery of both sides of the glass sheet 2 is formed of the low-elasticity body 6. The elastic modulus of the low-elasticity body 6 is equivalent to a rubber hardness of 70 degrees or less (rubber hardness of 70 degrees or less). In other words, it is an elastic modulus that allows the glass sheet 2 to deform to the extent that it can accommodate the deformation by recessing the deformed portion. In this sense, the low-elasticity body 6 can be said to be formed of a flexible material. The use of such a low-elasticity body 6 prevents the glass sheet 2 from being strongly constrained within the frame 3, even if the glass sheet 2 is bent and deformed during the cold bend process. This eliminates any obstacles to bending the glass sheet 2, thereby reducing stress on the glass sheet 2. This prevents the glass sheet 2 from cracking due to warping. In other words, it is possible to provide a cold bent glass unit 1 that does not hinder the bending of the glass sheet 2 by the cold bent method even when the glass sheet 2 is supported by the frame 3. In the following figures, the intermediate material 4 formed from the low elastic modulus body 6 is hatched.

[0030] In the cold vent method, because force is applied near the bent corner 2a, it is necessary to consider cracks in the glass sheet 2 due to stress near the bent corner 2a. However, it has been found that the stress on the warped edge 5 is actually greater than the stress near the bent corner 2a. In other words, in the cold vent method, it is also necessary to consider the possibility of cracks occurring at the warped edge 5 of the glass sheet 2. This is thought to be because the effect of twisting the glass surface when force is applied to the bent corner 2a to bend the glass is particularly large on the long side adjacent to the diagonal corner 2b when the glass sheet 2 is rectangular, and therefore deformation is likely to be large. Therefore, it is necessary that at least the intermediate material 4, which is arranged between the warped edge 5 and the frame 3 and on the near side of the force application direction P, be formed from a low-elasticity material 6. In this way, the intermediate material 4 disposed between the warped edge 5 and the frame 3 on the front side of the force application direction P is formed of the low-elasticity body 6, which has an elastic modulus that can deform in accordance with the deformation of the glass sheet 2. Even if the warped edge 5 warps toward the front side of the force application direction P when force is applied to the vent corner 2a by the cold venting method, the low-elasticity body 6 absorbs the warped edge and deforms itself. As a result, the force pressing down on the warped edge 5 when it warps is reduced, thereby suppressing stress generated in the glass sheet 2. This prevents cracks from occurring in the glass sheet 2. In this case, as described above, when the glass sheet 2 is rectangular in plan view, greater stress is generated on the longer sides. Therefore, by using these as the warped edges 5, the sides subjected to greater stress can be effectively deformed.

[0031] As shown in FIG. 5 , the elastic modulus of the low-elasticity body 6 may be lower than that of any of the intermediate materials 4 disposed at all corners 2a, 2b, and 2c of the glass sheet 2 on the near and far sides of the force application direction P. As described above, the low-elasticity body 6 is disposed at least on the near side of the warped edge 5 in the force application direction P. Therefore, at any corner of the glass sheet 2, an intermediate material 4 having a higher elastic modulus than the low-elasticity body 6 (e.g., an elastic modulus obtained by a rubber hardness greater than 70 degrees) is used. Therefore, the glass sheet 2 is firmly held at any corner, preventing the glass sheet 2 from moving due to wind pressure within the frame 3. This is effective when the cold bent glass unit 1 is used in the exterior wall of a building (wind pressure countermeasure). In this case, by disposing the high-elasticity intermediate material 4 on the near side of the force application direction P at the diagonal corner 2b and on the far side of the force application direction P at both other corners 2c, as shown in FIG. 5 , a cold bent glass unit 1 further suited to the cold bent construction method can be provided. In the cold venting method, a force is applied to the vent corner 2a in the force direction P, but at this time, a force acts on the diagonal corner 2b in the opposite direction to the force direction P, and on the other corner 2c, a force acts in the force direction P. Because the intermediate material 4 with a high elastic modulus is arranged in the direction in which these forces are received, the force can be efficiently transmitted to the vent corner 2a.

[0032] As shown in FIG. 6 , the elastic modulus of the low-elasticity bodies 6 may be lower than that of the intermediate materials 4 arranged at all corners 2a, 2b, and 2c of the glass plate 2 on the front and rear sides in the force application direction P. That is, the intermediate materials 4 arranged on the front side of the warped edge 5 in the force application direction P are low-elasticity bodies 6, and the intermediate materials 4 arranged at all corners 2a, 2b, and 2c (on the front and rear sides in the force application direction P) have a higher elastic modulus than the low-elasticity bodies 6. The high elastic modulus of the intermediate materials 4 arranged at all corners 2a, 2b, and 2c further improves the wind pressure countermeasures described above. The shape of the intermediate materials 4 arranged at the corners 2a, 2b, and 2c may be an integrated L-shape in plan view as shown in FIGS. 4 and 5 , or may be formed only in correspondence with the corners without extending beyond a portion of the side as shown in FIG. 6 . Alternatively, the intermediate materials 4 may be separate L-shapes in plan view as shown in FIG. 9 (described later). The concept of the shape of the intermediate material 4 disposed at the corner is the same in all the embodiments.

[0033] 7, the elastic modulus of the low elastic modulus body 6 may be lower than the elastic modulus of all intermediate materials 4 arranged on the rear side in the force application direction P. In other words, the intermediate materials 4 arranged on the front side of the warped edge 5 in the force application direction P are low elastic modulus bodies 6, and all intermediate materials 4 arranged on the rear side in the force application direction P, including the corners, have a higher elastic modulus than the low elastic modulus bodies 6. By supporting the entire one surface of the glass plate 2 with intermediate materials 4 having a high elastic modulus in this way, the above-mentioned wind pressure countermeasures can be further ensured.

[0034] As shown in Fig. 8, low elastic modulus bodies 6 may be arranged only on the front side of the force application direction P at positions corresponding to the four sides of the glass plate 2. Even with this configuration, the intermediate material 4 arranged on the front side of the warped edge 5 in the force application direction P is the low elastic modulus body 6, so that cracks from the warped edge 5 can be prevented and the wind pressure countermeasures shown in Figs. 6 and 7 above can be further improved.

[0035] As shown in FIG. 9 , the elastic modulus of the low-elasticity bodies 6 may be lower than that of the intermediate materials 4 arranged on the near and far sides of the short sides of the glass sheet 2 in the force application direction P. That is, the intermediate materials 4 arranged on the near side of the warped edge 5 in the force application direction P are low-elasticity bodies 6, and the elastic modulus of the intermediate materials 4 arranged on the near and far sides of the short sides of the glass sheet 2 in the force application direction P is higher than that of the low-elasticity bodies 6. This allows intermediate materials 4 with high elasticity to be arranged at least on the long sides other than the warped edge 5 where warping occurs. This ensures that the low-elasticity bodies 6 can reliably release stress from the warp at the warped edge 5, preventing cracks and further improving the wind pressure countermeasures shown in FIGS. 6 and 7 . Applying this concept further, as shown in FIG. 10 , the elastic modulus of the low-elasticity bodies 6 may be lower than that of the intermediate materials 4 arranged on the near and far sides of the opposite side of the warped edge 5 in the force application direction P. 9, the elastic modulus of the intermediate material 4 arranged on both sides opposite the curved edge 5 is made higher than that of the low elastic modulus material 6. This increases the elastic modulus of the intermediate material 4 arranged on areas other than both sides of the curved edge 5, making it possible to more efficiently counter the wind pressure.

[0036] Further applying this concept, as shown in FIG. 11 , the elastic modulus of the low-elasticity body 6 may be lower than that of the intermediate material 4 disposed on the far side of the warped edge 5 in the force application direction P. With this configuration, only the intermediate material 4 disposed on the near side of the warped edge 5 in the force application direction P is the low-elasticity body 6. This allows at least the low-elasticity body 6 to be disposed on the warped edge 5 side where warping occurs, while the high-elasticity body 4 is disposed elsewhere. This allows the low-elasticity body 6 to reliably release stress from the warped edge 5, preventing cracking and further improving the aforementioned wind pressure countermeasures. Considering that the cold bent construction method causes the warped edge 5 to warp toward the near side in the force application direction P, it is sufficient to have the low-elasticity body 6 at least on the near side of the warped edge 5 in the force application direction P. All that remains is to consider countermeasures against wind pressure and the efficient transmission of the applied force during bending of the bend corner 2a, and to appropriately place intermediate materials 4 with a higher elastic modulus than the low-elasticity body 6.

[0037] As shown in FIGS. 12 to 14 , in the cold bent glass unit 1 according to the present invention that has undergone the cold bent technique, the bent corner 2a is located further back in the force application direction P than the diagonal corner 2b and the two other corners 2c (the glass sheet 2 is bent by the applied force). At the same time, the opposite side 5, together with the frame 3, is warped (curved) toward the front side in the force application direction P. At this time, the joint between the long side and the short side of the frame 3 sinks (moves toward the back side in the force application direction P). In the cold bent technique, such movement of the frame 3 causes bending in the glass sheet 2. The intermediate member 4, which takes into account the arrangement of the low-elasticity bodies 6 as described above, does not restrain the deformation of the glass sheet 2 (movement of the bent corner 2a and curvature of the warped side 5) by the frame 3. This is the effect of the present invention, which prevents excessive stress from being generated in the glass sheet 2 and prevents the glass sheet 2 from breaking.

[0038] The cold bent method for forming such a cold bent glass unit 1 is carried out as follows. As shown in FIG. 13, an assembly process is first carried out (step S1). This assembly process is a process of interposing an intermediate material 4 between the frame 3 and the glass plate 2. As the intermediate material 4, low elastic modulus bodies 6 are arranged at positions corresponding to each corner and side of the glass plate 2 as appropriate, taking into account the above-mentioned considerations. This process may be carried out at the construction site, or may be carried out in advance at a location separate from the construction site, such as a factory. In essence, this is a process of manufacturing the cold bent glass unit 1 before the bent corner portion 2a is moved by application of force.

[0039] Next, a bending force application process is performed (step S2). This process applies force to the bent corner 2a in the force application direction P to move the bent corner 2a and bend the warped edge 5 toward the front side of the force application direction P, causing warping. This process is characterized by not only moving the bent corner 2a but also warping the warped edge 5. Because this warping occurs, a low-elasticity body 6 is placed on the front side of the warped edge 5 in the force application direction P to prevent unnecessary stress from being applied to the glass sheet 2. This prevents excessive stress from being applied to the glass sheet 2, allowing for efficient cold bent construction. Like the assembly process, this bending process may be performed at the construction site or in advance at a location separate from the construction site, such as a factory. Essentially, this is the process for manufacturing the cold bent glass unit 1 after the bent corner 2a is moved by the application of force.

[0040] Here, in the force application step, the diagonal corner 2b may be pressed from the front side in the force application direction P, and the two other corners 2c (corners of the glass plate 2 other than the vent corner 2a and the diagonal corner 2b) may be pressed from the rear side in the force application direction P. When performing the cold venting method, when a force is applied to the vent corner 2a in the force application direction P, a moment force acts to move the diagonal corner 2b toward the front side in the force application direction P. Therefore, by pressing (supporting) the diagonal corner 2b from the front side in the force application direction P, force can be efficiently applied to the vent corner 2a, and the vent corner 2a can be moved appropriately. At this time, a force acts on the two other corners 2c that moves them toward the rear side in the force application direction P, so by pressing (supporting) the two other corners 2c from the rear side in the force application direction P, the vent corner 2a can be moved more efficiently. [Explanation of symbols]

[0041] 1: Cold bent glass unit, 2: Glass plate, 2a: Bend corner, 2b: Diagonal corner, 2c: Other corner, 3: Frame, 4: Intermediate material, 5: Warped edge, 6: Low modulus of elasticity body

Claims

1. A rectangular glass plate; a bent corner portion at one corner of the glass sheet to which a force is to be applied in a force application direction by a cold bent method; a diagonal corner portion which is another corner of the glass plate located diagonally opposite the bent corner portion; a warped edge of the glass sheet adjacent to the diagonal corner, where warping is to occur by the cold bent method; Two other corners other than the bent corner and the diagonal corner; a frame that covers and supports the periphery of the glass plate, an intermediate material is interposed between the frame and the glass plate, the intermediate material disposed between the warped edge and the frame on the front side in the force application direction is formed of a low-elasticity body having an elastic modulus that can deform in accordance with deformation of the glass plate, A cold bent glass unit characterized in that the elastic modulus of the low elastic modulus body is lower than the elastic modulus of any of the intermediate materials arranged at all corners of the glass plate on the front and back sides of the force application direction.

2. A cold bent glass unit as described in claim 1, characterized in that the elastic modulus of the low elastic modulus body is lower than the elastic modulus of the intermediate material arranged at all corners of the glass plate on the front and rear sides in the force application direction.

3. A rectangular glass plate; a bent corner portion at one corner of the glass sheet to which a force is to be applied in a force application direction by a cold bent method; a diagonal corner portion which is another corner of the glass plate located diagonally opposite the bent corner portion; a warped edge of the glass sheet adjacent to the diagonal corner, where warping is to occur by the cold bent method; Two other corners other than the bent corner and the diagonal corner; a frame that covers and supports the periphery of the glass plate, an intermediate material is interposed between the frame and the glass plate, the intermediate material disposed between the warped edge and the frame on the front side in the force application direction is formed of a low-elasticity body having an elastic modulus that can deform in accordance with deformation of the glass plate, A cold bent glass unit, characterized in that the elastic modulus of the low elastic modulus body is lower than the elastic modulus of all of the intermediate materials arranged on the far side in the force application direction.

4. A rectangular glass plate; a bent corner portion at one corner of the glass sheet to which a force is to be applied in a force application direction by a cold bent method; a diagonal corner portion which is another corner of the glass plate located diagonally opposite the bent corner portion; a warped edge of the glass sheet adjacent to the diagonal corner, where warping is to occur by the cold bent method; Two other corners other than the bent corner and the diagonal corner; a frame that covers and supports the periphery of the glass plate, an intermediate material is interposed between the frame and the glass plate, the intermediate material disposed between the warped edge and the frame on the front side in the force application direction is formed of a low-elasticity body having an elastic modulus that can deform in accordance with deformation of the glass plate, the glass plate has opposing short sides and long sides, at least one of the long sides being the warped side, A cold bent glass unit characterized in that the elastic modulus of the low elastic modulus body is lower than the elastic modulus of the intermediate material arranged on the short side of the glass plate on the front and rear sides in the force application direction.

5. A rectangular glass plate; a bent corner portion at one corner of the glass sheet to which a force is to be applied in a force application direction by a cold bent method; a diagonal corner portion which is another corner of the glass plate located diagonally opposite the bent corner portion; a warped edge of the glass sheet adjacent to the diagonal corner, where warping is to occur by the cold bent method; Two other corners other than the bent corner and the diagonal corner; a frame that covers and supports the periphery of the glass plate, an intermediate material is interposed between the frame and the glass plate, the intermediate material disposed between the warped edge and the frame on the front side in the force application direction is formed of a low-elasticity body having an elastic modulus that can deform in accordance with deformation of the glass plate, the glass plate has opposing short sides and long sides, at least one of the long sides being the warped side, A cold bent glass unit characterized in that the elastic modulus of the low elastic modulus body is lower than the elastic modulus of the intermediate material arranged on the front and rear sides of the opposite side of the warped side in the force application direction.

6. A rectangular glass plate; a bent corner portion at one corner of the glass sheet to which a force is to be applied in a force application direction by a cold bent method; a diagonal corner portion which is another corner of the glass plate located diagonally opposite the bent corner portion; a warped edge of the glass sheet adjacent to the diagonal corner, where warping is to occur by the cold bent method; Two other corners other than the bent corner and the diagonal corner; a frame that covers and supports the periphery of the glass plate, an intermediate material is interposed between the frame and the glass plate, the intermediate material disposed between the warped edge and the frame on the front side in the force application direction is formed of a low-elasticity body having an elastic modulus that can deform in accordance with deformation of the glass plate, the glass plate has opposing short sides and long sides, at least one of the long sides being the warped side, A cold bent glass unit, characterized in that the elastic modulus of the low elastic modulus body is lower than the elastic modulus of the intermediate material arranged on the rear side of the warped edge in the force application direction.

7. The cold bent glass unit according to any one of claims 1 to 6, characterized in that the vent corner portion is located further back in the force application direction than the diagonal corner portion and the two other corner portions, and the warped side is curved toward the front side in the force application direction.

8. A cold venting method using the cold vent glass unit according to any one of claims 1 and 3 to 6, an assembly step of interposing the intermediate member between the frame and the glass plate; and a force application step of applying force to the vent corner portion in the force application direction to position the vent corner portion further back in the force application direction than the diagonal corner portion and the two other corner portions, and curving the warped side toward the front side in the force application direction.

9. 9. The cold venting method according to claim 8, wherein in the force application step, the diagonal corner portion is pressed from the front side in the force application direction, and the other two corner portions are pressed from the rear side in the force application direction.

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