Light-transmitting member and multilayer light-transmitting body

Abstract

This translucent member comprises: a pair of translucent sheet materials disposed so as to face each other; an aerogel layer formed by an aerogel filled in between the pair of translucent sheet materials; and a holding member that seals outer edge parts between the pair of translucent sheet materials, holds lateral ends of the pair of translucent sheet materials in the width direction, with the lateral ends being inclined inward in the thickness direction, and inhibits the pair of translucent sheet materials from swelling due to lateral pressure from the aerogel layer acting on the pair of translucent sheet materials.

Description

Technical Field

[0001] The present disclosure relates to a light-transmitting member and a multilayer light-transmitting body.

Background Art

[0002] Japanese Unexamined Patent Application Publication No. 7-220662 relates to a pixel device that requires the interior to be at a pressure lower than atmospheric pressure. This Japanese Unexamined Patent Application Publication No. 7-220662 discloses a technique related to a lightweight and thin planar pixel device.

[0003] Japanese Unexamined Patent Application Publication No. 2006-274662 discloses a technique related to a glass plate fixing structure in which both ends in the direction in which a compressive force acts on a glass plate on which a compressive force acts are fitted and fixed in concave groove portions of fixing metal fittings on the housing side. A buffer material is sandwiched between both surfaces of both ends of this glass plate and the concave groove portions.

[0004] Japanese Unexamined Patent Application Publication No. 2007-198016 discloses a technique related to a glass panel fixing structure for fixing a glass panel inside a framework or a frame.

[0005] Japanese Unexamined Patent Application Publication No. 2018-178372 discloses a technique related to a light-transmitting member using an aerogel, particularly a light-transmitting member used as a building material such as an outer wall panel. This light-transmitting member uses an aerogel including a first light-transmitting plate and a second light-transmitting plate, and a translucent region defined between these first light-transmitting plate and second light-transmitting plate. The translucent region is formed by filling at least translucent particles of the aerogel between the first light-transmitting plate and the second light-transmitting plate. The average particle diameter of the translucent particles is in the range of 0.05 to 0.5 mm.

Summary of the Invention

Problems to be Solved by the Invention

[0006] When forming an aerogel layer by filling an aerogel between a pair of oppositely arranged translucent plates, if the pair of translucent plates bulge outward due to the pressure (side pressure) acting on the pair of translucent plates from the aerogel layer, there is a risk of overfilling the aerogel between the pair of translucent plates.

[0007] An object of the present disclosure is to suppress the outward bulging of a pair of translucent plates when forming an aerogel layer by filling an aerogel between the pair of translucent plates.

Means for Solving the Problem

[0008] The translucent member according to the first aspect includes a pair of translucent plates arranged to face each other, an aerogel layer formed by an aerogel filled between the pair of translucent plates, and seals an outer edge portion between the pair of translucent plates and holds side end portions in the width direction of the pair of translucent plates in a state of being inclined inward in the thickness direction with respect to each other, and a holding member that suppresses the bulging of the pair of translucent plates due to side pressure acting on the pair of translucent plates from the aerogel layer.

[0009] According to the first aspect, the side end portions in the width direction of the pair of translucent plates are held in a state of being inclined inward in the thickness direction with respect to each other by the holding member. Therefore, in a state where no aerogel is filled, the pair of translucent plates are curved inward in the thickness direction as they go from each side end portion toward the central portion in the width direction. As a result, in the first aspect, when forming an aerogel layer by filling an aerogel between the pair of translucent plates, compared with the case where the side end portions of the pair of translucent plates are not inclined, the outward bulging of the pair of translucent plates is suppressed. Thus, overfilling of the aerogel between the pair of translucent plates is prevented or suppressed. Further, by holding the pair of translucent plates in a state of being inclined inward in the thickness direction by the holding member, the form of the pair of translucent plates is easily maintained when transporting or moving the translucent member before filling the aerogel between the pair of translucent plates.

[0010] Further, since the side end portions in the width direction of the pair of translucent plate members are held by the holding member in a state of being inclined toward the inside in the thickness direction with respect to each other, a compressive force is applied to the aerogel layer from the side end portions in the width direction of the pair of translucent plate members. Since the vibration of the aerogel layer is suppressed by this compressive force, the settlement of the aerogel due to vibration or the like is prevented or suppressed.

[0011] In the translucent member according to the second aspect, in the translucent member according to the first aspect, the holding member has a frame portion along the end face of the side end portion of the translucent plate member, and protrudes in a state of being inclined from the outer end portion of the frame portion toward the inside in the thickness direction of the translucent plate member, and has an outer claw portion disposed along the outer surface of the side end portion, and the holding member has a higher rigidity than the translucent plate member.

[0012] According to the second aspect, the outer claw portion of the holding member protrudes in a state of being inclined from the outer end portion of the frame portion toward the inside in the thickness direction of the translucent plate member. Further, the holding member has a higher rigidity than the translucent plate member. Thereby, when a side pressure acts on the outer claw portion from the aerogel layer, the collapse of the outer claw portion is suppressed. Therefore, the holding member can continue to hold the side end portions in the width direction of the pair of translucent plate members in a state of being inclined toward the inside in the thickness direction with respect to each other.

[0013] In the translucent member according to the third aspect, in the translucent member according to the second aspect, the outer claw portion has a higher rigidity than the translucent plate member.

[0014] In the translucent member according to the fourth aspect, in the translucent member according to the second aspect, the outer claw portion protrudes from the outer end portions on both sides of the frame portion and is disposed along the outer surfaces of the side end portions of the pair of translucent plate members, respectively.

[0015] In the translucent member according to the fifth aspect, in the translucent member according to the second aspect, the holding member has an inner claw portion that protrudes in a state of being inclined from the inside of the outer end portion of the frame portion toward the inside in the thickness direction of the translucent plate member and is disposed along the inner surface of the side end portion.

[0016] According to the fifth aspect, the inner claw portion of the holding member projects in an inclined state from the inner side of the outer end portion of the frame portion toward the inner side in the thickness direction of the translucent plate member. Further, the holding member has a greater rigidity than the translucent plate member. Thereby, when side pressure acts on the outer claw portion and the inner claw portion from the aerogel layer, the collapse of the outer claw portion and the inner claw portion is suppressed. Therefore, the holding member can continue to hold the side end portions in the width direction of the pair of translucent plate members in a state where they are inclined toward the inner side in the thickness direction with respect to each other.

[0017] The translucent member according to the sixth aspect is the translucent member according to the fifth aspect, wherein the outer claw portion and the inner claw portion have a greater rigidity than the translucent plate member.

[0018] The translucent member according to the seventh aspect is the translucent member according to the fifth aspect, wherein the length of the outer claw portion in the protruding direction is equal to or greater than the length of the inner claw portion in the protruding direction.

[0019] The translucent member according to the eighth aspect is the translucent member according to the fifth aspect, wherein the length of the outer claw portion in the protruding direction is the same as the length of the inner claw portion in the protruding direction.

[0020] The translucent member according to the ninth aspect is the translucent member according to the fifth aspect, wherein the inner claw portion projects from the inner sides of the outer end portions on both sides of the frame portion and is disposed along the inner surfaces of the side end portions of the pair of translucent plate members, respectively.

[0021] The translucent member according to the tenth aspect is the translucent member according to the first aspect, wherein the pair of translucent plate members bulge outward in the thickness direction from the side end portions toward the central portion in the width direction.

[0022] The translucent member according to the eleventh aspect is the translucent member according to the first aspect, wherein the holding member holds the side end portions on both sides in the width direction of the pair of translucent plate members, respectively.

[0023] The translucent member according to the twelfth aspect is the translucent member according to the first aspect, wherein the translucent plate member has a plurality of hollow portions filled with aerogel.

[0024] The translucent member according to the 13th aspect is the translucent member according to the 5th aspect, wherein the translucent plate material includes a pair of polycarbonate plates facing each other, and a plurality of ribs provided between the pair of polycarbonate plates for connecting the pair of polycarbonate plates and forming a plurality of hollow portions between the pair of polycarbonate plates, and the hollow portions are filled with aerogel.

[0025] The multi-layer translucent body according to the 14th aspect includes a plurality of translucent plates facing each other and having their edges closed, and a translucent member according to any one of the 1st to 13th aspects provided with a space from the translucent plates in a hollow layer between adjacent translucent plates.

[0026] According to the 14th aspect, since the translucent member in which an aerogel layer is formed between a pair of translucent plate materials is provided in the hollow layer between adjacent translucent plates, the heat insulation property of the multi-layer translucent body is improved. Further, the bulging of the pair of translucent plate materials due to the side pressure acting on the pair of translucent plate materials from the aerogel layer is suppressed by the holding member. Thereby, the contact between the translucent plate and the translucent plate material is prevented, so that the heat insulation effect of the multi-layer translucent body is improved.

[0027] The multi-layer translucent body according to the 15th aspect is the multi-layer translucent body according to the 14th aspect, wherein the translucent plate material and the translucent plate are made of glass plates, and the thickness of the translucent plate material is equal to or less than the thickness of the translucent plate.

Advantages of the Invention

[0028] According to the present disclosure, when filling aerogel between a pair of translucent plate materials to form an aerogel layer, it is possible to suppress the pair of translucent plate materials from bulging outward.

Brief Description of the Drawings

[0029]

Figure 1

Figure 2

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Figure 3B

Figure 4A

Figure 4B

Figure 5A

Figure 5B

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Figure 8

Figure 9

Figure 10

Figure 11A

Figure 11B

Figure 12A

Figure 12B

Figure 13A

Figure 13B

Figure 14A

Figure 14B

Figure 15

Mode for Carrying Out the Invention

[0030] <First Embodiment> The multilayer light-transmitting body of the first embodiment will be described. Here, two horizontal directions orthogonal to each other are defined as the X direction and the Y direction, and the respective directions are indicated by arrow X and arrow Y. The vertical direction orthogonal to the X direction and the Y direction is defined as the Z direction, and the direction is indicated by arrow Z. Further, a multilayer light-transmitting body 12 described later is installed in a state where the out-of-plane direction of a glass plate 52 as an example of a light-transmitting plate is in the Y direction. Based on this state, the structure of the multilayer light-transmitting body 12 will be described.

[0031] (Structure) First, the structure of the multilayer light-transmitting body will be described. Note that FIG. 1 is a cross-sectional view showing a horizontal cross-section of the central portion in the vertical direction of the multilayer light-transmitting body. FIG. 2 is a cross-sectional view showing a vertical cross-section of the central portion in the X direction of the multilayer light-transmitting body.

[0032] The multilayer light-transmitting body 12 shown in FIGS. 1 and 2 includes two glass plates 52 as an example of light-transmitting plates, and a light-transmitting member 10 provided between the two glass plates 52. The glass plates 52 and the light-transmitting member 10 have a rectangular shape when viewed from the Y direction. The multilayer light-transmitting body 12 of the present embodiment is attached to a window frame 16. However, the attachment target of the multilayer light-transmitting body 12 is not limited to the window frame 16.

[0033] A hollow layer 55 is formed between the two glass plates 52. A spacer 21 is sandwiched between the edge portions 53 of the two glass plates 52. In the present embodiment, the edge portion 53 of the glass plate 52 and the spacer 21 are adhered with a butyl-based tape material 22. However, the joining method of the edge portion 53 of the glass plate 52 and the spacer 21 can be appropriately changed. Further, the outside of the spacer 21 between the edge portions 53 of the two glass plates 52 is closed by a silicone-based sealing material 31 as an example of a closing material.

[0034] Note that the spacer 21 of the present embodiment has a hollow inside. A desiccant (not shown) is filled in the hollow portion of the spacer 21. However, the structure of the spacer 21 can be appropriately changed.

[0035] In the hollow layer 55, a light-transmitting member 10 is provided. The light-transmitting member 10 includes two hollow polycarbonate plates 100 as an example of a light-transmitting resin plate, a holding member 150 (see FIGS. 2 and 3B), a holding member 151 (see FIGS. 1 and 3A), and an aerogel layer 130. The aerogel layer 130 is formed by filling aerogel N between the two hollow polycarbonate plates 100. The hollow polycarbonate plate 100 of the present embodiment has a rectangular shape when viewed from the Y direction.

[0036] As shown in FIG. 15, the hollow polycarbonate plate 100 includes two polycarbonate plates 102 facing each other and a plurality of ribs 104 provided between the two polycarbonate plates 102. The plurality of ribs 104 connect the two polycarbonate plates 102. A plurality of hollow portions 106 arranged in a predetermined direction are formed by these polycarbonate plates 102 and ribs 104. And the hollow portions 106 of the hollow polycarbonate plate 100 are filled with aerogel M.

[0037] As shown in FIG. 1, the holding member 151 holds and seals the side end portions 110X in the width direction along the X direction of the two hollow polycarbonate plates 100 and seals the outer edge portion 132X between the two hollow polycarbonate plates 100.

[0038] The holding member 151 shown in FIGS. 1 and 3A has a frame portion 151C, two outer claw portions 151B protruding from both outer end portions of the frame portion 151C, and two inner claw portions 151A protruding from the inside of the two outer claw portions 151B in the frame portion 151C.

[0039] The frame portion 151C is provided along the end face 112X of the side end portion 110X of the hollow polycarbonate plate 100. The outer claw portions 151B are respectively provided along the outer surface 113X of the side end portion 110X of the two hollow polycarbonate plates 100. The inner claw portions 151A are respectively provided along the inner surface 114X of the side end portion 110X of the two hollow polycarbonate plates 100. The outer claw portions 151B and the inner claw portions 151A are inclined toward the inner side in the thickness direction of the hollow polycarbonate plate 100, that is, toward the aerogel layer 130 side. Further, the holding member 151 has a greater rigidity than the hollow polycarbonate plate 100. Also, the frame portion 151C has a greater rigidity than the outer claw portions 151B and the inner claw portions 151A.

[0040] As shown in FIG. 1, the side end portions 110X of the pair of hollow polycarbonate plates 100 are held by the holding member 151 in a state of being inclined toward each other inward in the thickness direction (toward the aerogel layer 130 side).

[0041] Note that the rigidity of the hollow polycarbonate plate 100 is the flexural rigidity when the hollow polycarbonate plate 100 bends in the Y direction with the side end portions 110X on both sides in the X direction, which are pin-fixed (pin-supported), as fulcrums.

[0042] Here, FIG. 1 and FIGS. 2, 4B, 5B, etc. described later illustrate the degree of curvature of the hollow polycarbonate plate 100 to be larger than the actual degree of curvature for easier understanding.

[0043] As shown in FIG. 2, the holding member 150 holds and seals the side end portions 110Z in the width direction along the Z direction of the two hollow polycarbonate plates 100 and seals the outer edge portion 132Z between the two hollow polycarbonate plates 100.

[0044] Note that since the holding member 150 has the same structure as the aforementioned holding member 151, the description of the structure of the holding member 150 is simplified. The holding member 150 shown in FIGS. 2 and 3B has a frame portion 150C, two outer claw portions 150B protruding from the outer end portions on both sides of the frame portion 150C, and two inner claw portions 150A protruding from the inside of the two outer claw portions 150B in the frame portion 150C. The outer claw portion 150B and the inner claw portion 150A are inclined toward the inside in the thickness direction of the outer claw portion 150B and the inner claw portion 150A, that is, toward the aerogel layer 130 side. Further, the holding member 150 has higher rigidity than the hollow polycarbonate plate 100. Further, the frame portion 150C has higher rigidity than the outer claw portion 150B and the inner claw portion 150A.

[0045] As a result, as shown in FIG. 2, the side end portions 110Z of the pair of hollow polycarbonate plates 100 are held by the holding member 150 in a state of being inclined toward each other toward the inside in the thickness direction (the aerogel layer 130 side).

[0046] Note that the rigidity of the hollow polycarbonate plate 100 is the flexural rigidity when the hollow polycarbonate plate 100 bends in the Y direction with the side end portions 110X on both sides in the Z direction fixed (supported by pins) as fulcrums.

[0047] As shown in FIGS. 1 and 2, the side end portions 110X and 110Z of the two hollow polycarbonate plates 100 are inclined inward. In the horizontal cross-section shown in FIG. 1, an aerogel layer 130 is formed by the aerogel N filled between the two hollow polycarbonate plates 100. Due to the side pressure acting on the inner surfaces of the two hollow polycarbonate plates 100 from the aerogel layer 130, the two hollow polycarbonate plates 100 bulge (swell) outward in the thickness direction from the side end portions 110X and 110Z toward the central portion. However, a gap L is formed between the hollow polycarbonate plate 100 and the glass plate 52. Also in the vertical cross-section shown in FIG. 2, due to the side pressure acting on the two hollow polycarbonate plates 100 from the aerogel layer 130, the two hollow polycarbonate plates 100 bulge (swell) outward in the thickness direction. The bulge of the two hollow polycarbonate plates 100 is larger at the lower part and becomes smaller toward the upper part. A gap L is formed between the hollow polycarbonate plate 100 and the glass plate 52.

[0048] As shown in FIGS. 1 and 2, the gap at the joint portion between the holding member 150 and the holding member 151 is filled with a sealing material such as a silicone-based material, a foam material such as a continuous foam urethane sponge, and a hot melt adhesive, etc., and is sealed to such an extent that the aerogel N does not leak out from the gap.

[0049] Note that the side end portions 110X and 110Z of the hollow polycarbonate plate 100 are fixed to the holding members 150 and 151 by friction. However, the side end portions 110X and 110Z of the hollow polycarbonate plate 100 may be fixed to the holding members 150 and 151 using an adhesive such as a silicone-based sealing material.

[0050] As described above, the holding members 150 and 151 seal the outer edge portion of the light-transmitting member 10.

[0051] Further, the lengths of the outer claw portions 150B and 151B in the protruding direction and the lengths of the inner claw portions 150A and 151A in the protruding direction in the present embodiment are the same. However, the lengths of the outer claw portions 150B and 151B in the protruding direction and the lengths of the inner claw portions 150A and 151A in the protruding direction may be different. However, it is desirable that the lengths of the outer claw portions 150B and 151B in the protruding direction be equal to or greater than the lengths of the inner claw portions 150A and 151A in the protruding direction. Moreover, it is more desirable that the lengths of the outer claw portions 150B and 151B in the protruding direction be the same as the lengths of the inner claw portions 150A and 151A in the protruding direction. Note that the lengths of the outer claw portions 150B and 151B in the protruding direction and the lengths of the inner claw portions 150A and 151A in the protruding direction are the lengths (span) for holding the side end portions 110X and 110Z.

[0052] Here, an aerogel is a granular or powdery substance obtained by replacing the solvent contained in a gel with a gas by a supercritical drying method or the like, and is a porous low-density structure. In addition, the aerogels M and N may separately contain particle components such as silica fume, silica spherical particles, hollow silica, and polystyrene foam particles.

[0053] (Manufacturing Method) Next, an example of the manufacturing method of the translucent member 10 of the present embodiment will be described. Note that the following manufacturing method is an example and can be appropriately changed.

[0054] First, the hollow polycarbonate plate 100 is installed with the direction along the rib 104 (see FIG. 15), that is, with the axial direction of the cylindrical hollow portion 106 (see FIG. 15) as the vertical direction. Further, except for the upper side end portion 110Z of the hollow polycarbonate plate 100, holding members 150 and 151 are joined to the side end portions 110X and 110Z of the hollow polycarbonate plate 100 to close the lower opening ends of the hollow portion 106 and the aerogel layer 130. Then, the aerogel M is filled into the hollow portion 106 from the upper opening of the hollow portion 106 of the hollow polycarbonate plate 100. Note that when filling the aerogel M into the hollow portion 106, the hollow polycarbonate plate 100 may be vibrated.

[0055] FIG. 4A is a horizontal cross-section of the central portion in the Z direction of the hollow polycarbonate plate 100 in the above state. FIG. 5A is a vertical cross-section of the central portion in the X direction of the hollow polycarbonate plate 100 in the above state. When the holding member 150 is provided above the hollow polycarbonate plate 100 shown in FIG. 5A, although the curvature of the hollow polycarbonate plate 100 may be different, the hollow polycarbonate plate 100 is curved inward in the thickness direction as it goes from the side end 110Z toward the central portion in the width direction, and thus has the same shape as the hollow polycarbonate plate 100 shown in FIG. 4A.

[0056] Furthermore, aerogel N is filled between the two hollow polycarbonate plates 100, and the holding member 150 is joined to the upper side end 110Z of the hollow polycarbonate plate 100 to close the open ends above the hollow portion 106 and the aerogel layer 130. When filling aerogel N between the two hollow polycarbonate plates 100, vibration may be applied to the hollow polycarbonate plates 100.

[0057] FIG. 4B is a horizontal cross-section of the central portion in the Z direction of the hollow polycarbonate plate 100 in the above state. FIG. 5B is a vertical cross-section of the central portion in the X direction of the hollow polycarbonate plate 100 in the above state.

[0058] (Function and Effect) Next, the function and effect of the present embodiment will be described.

[0059] In the light-transmitting member 10 of the present embodiment, the side ends 110X and 110Z of the pair of hollow polycarbonate plates 100 are held by the holding members 150 and 151 in a state of being inclined inward in the thickness direction with respect to each other.

[0060] Therefore, when the pair of hollow polycarbonate plates 100 are not filled with the aerogel N between the pair of hollow polycarbonate plates 100, they curve inward in the thickness direction as they go from the side end portions 110X and 110Z toward the central portion in the width direction (see FIG. 4A). Thus, in this embodiment, when forming the aerogel layer 130 by filling the aerogel N between the pair of hollow polycarbonate plates 100 as compared with the case where the side end portions 110X and 110Z are not inclined, the pair of hollow polycarbonate plates 100 are suppressed from bulging outward. Therefore, overfilling of the aerogel N between the pair of hollow polycarbonate plates 100 is prevented or suppressed. Further, since the hollow polycarbonate plate 100 is suppressed from approaching or contacting the glass plate 52, the distance L between the hollow polycarbonate plate 100 and the glass plate 52 is ensured.

[0061] Further, by holding the pair of hollow polycarbonate plates 100 in a state of being inclined inward in the thickness direction by the holding members 150 and 151, the form of the pair of hollow polycarbonate plates 100 is easily maintained when transporting or moving the light-transmitting member 10 or the like before filling the aerogel N between the pair of hollow polycarbonate plates 100.

[0062] Here, as shown in FIGS. 14A and 14B, the case where the pair of hollow polycarbonate plates 100 are held by the holding member 950 according to the comparative example will be described. In the holding member 950 according to the comparative example, the outer claw portion 950B and the inner claw portion 950A are not inclined.

[0063] As shown in FIG. 14A, before filling the aerogel N between the two hollow polycarbonate plates 100, the two hollow polycarbonate plates 100 are parallel. Then, as shown in FIG. 14B, when the aerogel N is filled between the two hollow polycarbonate plates 100, the central portions in the width direction of the two hollow polycarbonate plates 100 curve and bulge in a direction away from each other due to the side pressure acting on the two hollow polycarbonate plates 100 from the aerogel layer 130. Note that in FIG. 14B, for clarity, the bulging amount of the two hollow polycarbonate plates 100 is shown larger than the actual amount.

[0064]

[0065]

[0066]

[0067]

[0068] It should be noted that the content you provided seems to have some repeated tags and text fragments. I have translated it as accurately as possible according to the rules. If you have any further questions or need further clarification, please feel free to let me know. Also, the Japanese text in and etc. seems to be a bit disordered in terms of the tag usage, but I've translated it based on the overall context. Here is the translated text:

[0064] Therefore, the filling amount of the aerogel N filled in the two hollow polycarbonate plates 100 increases. That is, the two hollow polycarbonate plates 100 are overfilled with the aerogel N. Further, since the central portion in the width direction of the hollow polycarbonate plate 100 approaches or contacts the glass plate 52 (see FIG. 1), the distance L between the hollow polycarbonate plate 100 and the glass plate 52 cannot be ensured.

[0065] In contrast, in this embodiment, the holding members 150 and 151 hold the side end portions 110X and 110Z of the hollow polycarbonate plate 100 in a state of being inclined inward in the thickness direction. Thereby, when filling the aerogel N between the two hollow polycarbonate plates 100 to form the aerogel layer 130, the risk that the pair of hollow polycarbonate plates 100 curve in a direction away from each other is suppressed.

[0066] Note that the hollow polycarbonate plate 100 of this embodiment curves in the Y direction with the side end portions 110Z on both sides in the Z direction fixed by pins as fulcrums, and also curves in the Y direction with the side end portions 110X on both sides in the X direction fixed by pins as fulcrums. Therefore, the hollow polycarbonate plate 100 has a complex curved shape in which ridgelines are formed from the corner portions toward the central portion. Further, a plurality of ribs 104 along the Z direction are formed inside the hollow polycarbonate plate 100 of this embodiment (see FIG. 15). Therefore, more precisely, the bending rigidity of the hollow polycarbonate plate 100 that curves in the Y direction with the side end portion 110Z fixed by pins as a fulcrum and the bending rigidity of the hollow polycarbonate plate 100 that curves in the Y direction with the side end portions 110X on both sides in the X direction fixed by pins as fulcrums are different. Therefore, the curved shape of the hollow polycarbonate plate 100 becomes even more complex.

[0067] Here, in this embodiment, the holding members 150 and 151 and the like are set so that the deflection of the hollow polycarbonate plate 100 falls within a specified value by the holding members 150 and 151.

[0068] The setting that the warp of the hollow polycarbonate plate 100 is within the specified value means that the warp of the hollow polycarbonate plate 100 in this embodiment is preferably set to be smaller than the warp of the hollow polycarbonate plate 100 when the hollow polycarbonate plate 100 is held by the holding member 950 of the comparative example.

[0069] Also, the setting that the warp of the hollow polycarbonate plate 100 is within the specified value means that the deviation from the set value of the interval L is preferably within a predetermined range, for example, within 10%. For example, when the set value of the interval L is 10 mm, the setting that the warp of the hollow polycarbonate plate 100 is within the specified value means that the interval L is within the range of 9 mm to 11 mm. Also, the setting that the warp of the hollow polycarbonate plate 100 is within the specified value means that, for example, when the aerogel N is filled without gaps between a pair of hollow polycarbonate plates 100, the deviation from the set amount of the aerogel N is preferably within a predetermined range, for example, within 10%.

[0070] Also, in the multi-layer light-transmitting body 12, the light-transmitting member 10 in which the aerogel layer 130 is formed between a pair of hollow polycarbonate plates 100 is provided in the hollow layer 55 between adjacent glass plates 52. Thereby, the heat insulation property of the multi-layer light-transmitting body 12 is improved. Also, in the multi-layer light-transmitting body 12, the warps of a pair of hollow polycarbonate plates 100 are held within the specified value by the holding members 150 and 151. Thereby, contact between the glass plate 52 and the hollow polycarbonate plate 100 is prevented, so that the heat insulation effect of the multi-layer light-transmitting body 12 is improved.

[0071] In addition, the side end portions 110X and 110Z of the pair of hollow polycarbonate plates 100 are held by the holding members 150 and 151 in a state of being inclined inward in the thickness direction with respect to each other. Therefore, for example, even in a portion where the side pressure acting on the pair of hollow polycarbonate plates 100 from the aerogel layer 130 is low, such as the upper end portion of the aerogel layer 130, a compressive force is applied from the pair of hollow polycarbonate plates 100 to the aerogel layer 130. Due to this compressive force, the movement of the aerogel due to vibration or the like of the aerogel layer 130 is suppressed, and thus the sedimentation of the aerogel N due to vibration or the like is prevented or suppressed.

[0072] Further, even if the pair of hollow polycarbonate plates 100 are temporarily elongated by heat, a compressive force acts from the pair of hollow polycarbonate plates 100 on the aerogel layer 130, so that the sedimentation of the aerogel N is suppressed.

[0073] In addition, the holding member 150 has a higher rigidity than the hollow polycarbonate plate 100. Therefore, even if a side pressure acts on the outer claw portions 150B and 151B and the inner claw portions 150A and 151A from the aerogel layer 130, the outer claw portions 150B and 151B and the inner claw portions 150A and 151A do not collapse. Thus, the holding member 150 can continue to hold the side end portions 110X and 110Z of the hollow polycarbonate plate 100 in a state of being inclined inward in the thickness direction with respect to each other.

[0074] Here, the rigidity of each member that resists the out-of-plane force of the hollow polycarbonate plate 100 has the following relationship as described above. Frame portions 150C and 151C > Outer claw portions 150B and 151B and inner claw portions 150A and 151A > Hollow polycarbonate plate 100

[0075] The moments generated in the hollow polycarbonate plate 100 due to the side pressure acting on the hollow polycarbonate plate 100 from the aerogel layer 130 are resisted by the outer claw portions 150B, 151B and the inner claw portions 150A, 151A. The moments generated in the outer claw portions 150B, 151B and the inner claw portions 150A, 151A are resisted by the frame portions 150C, 151C. At this time, when deformation occurs in the frame portions 150C, 151C, the outer claw portions 150B, 151B and the inner claw portions 150A, 151A, the side end portions 110X, 110Z of the hollow polycarbonate plate 100 seemingly rotate upward, and the deflection at the central position of the hollow polycarbonate plate 100 increases according to this rotation angle.

[0076] Therefore, the rigidity order of each member for suppressing the generation of deflection at the central position of the hollow polycarbonate plate 100 is as follows. Frame portions 150C, 151C ≥ Outer claw portions 150B, 151B and Inner claw portions 150A, 151A > Hollow polycarbonate plate 100 Also, the following rigidity order of each member for suppressing the generation of deflection at the central position of the hollow polycarbonate plate 100 is preferable. Frame portions 150C, 151C > Outer claw portions 150B, 151B and Inner claw portions 150A, 151A > Hollow polycarbonate plate 100

[0077] (Calculation example) Next, an example of calculating the amount of deflection of the hollow polycarbonate plate 100 will be described with reference to FIGS. 6, 7, and 8. In FIG. 8, for easy understanding of the explanation, the inner claw portion 151A of the holding member 151 is not inclined.

[0078] First, as shown in FIG. 8, the maximum amount of deflection of the hollow polycarbonate plate 100 when the hollow polycarbonate plate 100 is bent and fixed by the holding member 151 is set as the amount of deflection when two hollow polycarbonate plates 100 are in contact.

[0079] Let the center line in the thickness direction of the hollow polycarbonate plate 100 be CH, the thickness of the aerogel layer 130 be t, the width of the hollow polycarbonate plate 100 in the X direction be L, the maximum deflection amount of the hollow polycarbonate plate 100 be δMAX, and the rotation angle (maximum rotation angle) of the hollow polycarbonate plate 100 at that time be ΘMAX. Then, the following equations (Equation 1) and (Equation 2) can be obtained. δMAX=t / 2····(Equation 1) ΘMAX=t / L····(Equation 2)

[0080] Therefore, by the holding member 151, the side end portion 110X of the hollow polycarbonate plate 100 is fixed and held at a rotation angle of 0 rad to t / L rad. Let the width of the hollow polycarbonate plate 100 in the X direction be 300 mm (=L), the width of the hollow polycarbonate plate 100 in the Z direction be 1000 mm, and the thickness of the hollow polycarbonate plate 100 be 4 mm. Also, as shown in FIG. 8, the interval t between the side end portions 110X of the two opposed hollow polycarbonate plates 100 with an interval therebetween is 5 mm.

[0081] FIG. 6 is a graph showing the relationship between the rigidity of the hollow polycarbonate plate 100 and the rotation angle curve of the side end portion 110X in terms of the bending moment.

[0082] FIG. 7 shows the elastic region DS (linear portion) in FIG. 6, and the approximate equation of the elastic region DS (linear portion) is as follows (Equation 3). y = 1657x - 1.0832 (Equation 3)

[0083] In the case of the above conditions, when both ends of the side end portion 110X are pin-fixed, the side pressure acting on one hollow polycarbonate plate 100 from the aerogel layer 130 formed by filling aerogel N between two hollow polycarbonate plates 100 is determined by the volume of the aerogel layer 130, the density of the aerogel N, and the area of the hollow polycarbonate plate 100 receiving the load. For example, when filling aerogel N with a density of 80 g / L (liter) between two unfixed hollow polycarbonate plates 100, half of the weight (60 g) of the aerogel layer 130 obtained by multiplying the volume of the aerogel N (1.5 L = 5 [mm] × 300 [mm] × 1000 [mm]) by the density of 80 g / L acts on one hollow polycarbonate plate 100. At this time, in the cross-section along the X direction of the hollow polycarbonate plate 100, the uniformly distributed load acting on the hollow polycarbonate plate 100 is 0.2 g / mm (= 60 [g] / 300 [mm]). Also, the linear load acting on the central portion in the width direction of the hollow polycarbonate plate 100 is 0.00196 N / mm (= 0.2 [g / mm] × 9.8 / 1000). The bending moment generated at the side end portion 110X at this time is 22.05 N·mm (= 0.00196 [N / mm] × 300 2 [mm] / 8).

[0084] Substituting this value into the above (Equation 3), the rotation angle generated at the side end portion 110X is 0.014 rad. And when the rotation angle of the side end portion 110X is 0.014 rad, the deflection amount at the central portion of the hollow polycarbonate plate 100 is 2.09 mm.

[0085] Also, from the above (Equation 1) and (Equation 2), δMAX under these conditions is 2.5 mm, and ΘMAX is 0.016 rad.

[0086] Under this condition, by causing and fixing in advance a rotation angle of 0.014 rad of the side end portion 110X generated by the side pressure acting on the hollow polycarbonate plate 100 from the aerogel layer 130, the bulge of the hollow polycarbonate plate 100 is suppressed. As a result, a specified amount of aerogel N can be filled between the two hollow polycarbonate plates 100.

[0087] Note that the above calculation is an example of calculation when the hollow polycarbonate plate 100 bends in the Y direction with the side end portions 110X on both sides in the X direction fixed by pins as fulcrums.

[0088] However, as described above, the hollow polycarbonate plate 100 of the first embodiment also bends in the Y direction with the side end portions 110Z on both sides in the Z direction fixed by pins as fulcrums. In addition, a plurality of ribs 104 along the Z direction are formed inside the hollow polycarbonate plate 100 (see FIG. 15). Therefore, the hollow polycarbonate plate 100 of the first embodiment has a complex curved shape. Therefore, the above calculation example cannot be used as an accurate calculation example of the first embodiment, but can be used as a simple calculation example of the first embodiment. Note that when accurately obtaining the curved shape, rotation angle, etc. of the hollow polycarbonate plate 100, the curved shape, rotation angle, etc. may be obtained from the results of numerical analysis using a computer or experiments using prototypes.

[0089] (Experimental Example) Next, an experimental example in which it was confirmed that overfilling of aerogel N is suppressed by suppressing the bulge of the pair of hollow polycarbonate plates 100 in the light-transmitting member 10 of the first embodiment will be described.

[0090] Specifically, the overfilling of aerogel N is compared between the light-transmitting member 10 of the first embodiment shown in FIGS. 1, 2, 4A, 4B, 5A, and 5B and the light-transmitting member 900 of the comparative example shown in FIGS. 14A and 14B. Note that the light-transmitting member 10 of the first embodiment and the light-transmitting member 900 of the comparative example were compared under the following conditions.

[0091] For the translucent member 10 of the present embodiment used in the experiment, instead of the hollow polycarbonate plate 100, a solid polycarbonate plate with a thickness of 2 mm was used. Also, for the translucent member 900 of the comparative example used in the experiment, a 4-mm-thick hollow polycarbonate plate with no aerogel filled in the hollow part was used.

[0092] In addition, the holding members 150 and 151 of the present embodiment used in the experiment are made of ASA resin. The plate thickness of the inner claw portions 150A and 151A and the outer claw portions 150B and 151B of the present embodiment used in the experiment is 1.0 mm. The plate thickness of the frame portions 150C and 151C of the present embodiment used in the experiment is 1.5 mm. Similarly, the holding member 950 of the comparative example used in the experiment is made of ASA resin. The plate thickness of the inner claw portion 950A, the outer claw portion 950B, and the frame portion 950C of the comparative example used in the experiment is 0.5 mm.

[0093] Also, the size of the aerogel layer between the pair of polycarbonate plates of the present embodiment used in the experiment is 1.5 m in height, 0.3 m in width, and 9 mm in thickness. The specified amount α of the aerogel N filled between the pair of polycarbonate plates of the present embodiment used in the experiment is 311.85 g. Note that the size of the aerogel layer and the specified filling amount of the aerogel N are the numerical values when the pair of polycarbonate plates are not curved. Also, the aerogel N used in this experiment has an average particle diameter of about 3 mm and a density of 77 g / L (liter).

[0094] The size of the aerogel layer between the pair of polycarbonate plates of the comparative example used in the experiment is 1.0 m in height, 0.3 m in width, and 5 mm in thickness. The specified amount α of the aerogel N filled between the pair of polycarbonate plates of the comparative example is 115.5 g. Similarly, the aerogel N has an average particle diameter of about 3 mm and a density of 77 g / L.

[0095] Further, aerogel N was filled between a pair of polycarbonate plates while applying vibration. Specifically, a pair of polycarbonate plates (see FIGS. 4A and 5A) joined with holding members 150, 151, and 950, excluding the upper side end portions, were placed on a wood or other plate material and fixed. Then, while vibrating the plate material with a vibration device such as a ball vibrator, aerogel N was allowed to freely fall and fill between the pair of polycarbonate plates.

[0096] As a result, the filling amount β of aerogel N when using the holding members 150 and 151 of the present embodiment was 321.89 g. Therefore, the ratio β / α was 1.03. The filling amount β of aerogel N when using the holding member 950 of the comparative example was 168.45 g. Therefore, the ratio β / α was 1.46.

[0097] Thus, the filling amount β of aerogel N when using the holding members 150 and 151 of the present embodiment was almost equal to the specified amount α. However, the filling amount β of aerogel N when using the holding member 950 of the comparative example was nearly 1.5 times more than the specified amount α, and the filling amount of aerogel N became excessive. That is, in the light-transmitting member 10 of the present embodiment, it was confirmed in this experimental example that overfilling of aerogel N was suppressed.

[0098] <Second Embodiment> Next, the multi-layer light-transmitting body of the second embodiment will be described. In the second embodiment, the same members as those in the first embodiment are denoted by the same reference numerals as in the first embodiment, and the description of the same members as in the first embodiment will be simplified or omitted. Also, the second embodiment and the first embodiment differ only in the holding members of the light-transmitting member. Therefore, the description of the members other than the holding members of the second embodiment will be simplified or omitted.

[0099] (Structure) First, the structure of the multi-layer light-transmitting body will be described. Note that FIG. 9 is a cross-sectional view of a horizontal cross-section of the central portion in the vertical direction of the multi-layer light-transmitting body. FIG. 10 is a cross-sectional view of a vertical cross-section of the central portion in the X direction of the multi-layer light-transmitting body.

[0100] The multilayer light-transmitting body 13 shown in FIGS. 9 and 10 has, as an example of a light-transmitting plate, two glass plates 52 and a light-transmitting member 11 provided between the two glass plates 52.

[0101] In the hollow layer 55 between the two glass plates 52, a light-transmitting member 11 is provided. The light-transmitting member 11 is composed of two hollow polycarbonate plates 100 as an example of a light-transmitting resin plate, a holding member 250 (see FIGS. 10 and 11B), a holding member 251 (see FIGS. 9 and 11A), and an aerogel layer 130. The aerogel layer 130 is formed by filling aerogel N between the two hollow polycarbonate plates 100.

[0102] The holding member 251 shown in FIG. 9 holds and seals the side end portions 110X in the width direction along the X direction of the two hollow polycarbonate plates 100 and seals the outer edge portion 132X between the two hollow polycarbonate plates 100.

[0103] The holding member 251 shown in FIGS. 9 and 11A has a frame portion 251B and an outer claw portion 251A protruding from the outer end portion of the frame portion 251B. Explaining from another perspective, the holding member 251 has the same configuration as that of the holding member 151 in the first embodiment with the inner claw portion 151A (see FIG. 3A) omitted.

[0104] The frame portion 251B is provided along the end face 112X of the side end portion 110X of the hollow polycarbonate plate 100. The outer claw portion 251A is provided along the outer face 113X of the side end portion 110X. The outer claw portion 251A inclines toward the inner side in the thickness direction of the hollow polycarbonate plate 100, that is, toward the aerogel layer 130 side. Also, the holding member 251 has higher rigidity than the hollow polycarbonate plate 100. Further, the frame portion 251B has higher rigidity than the outer claw portion 251A.

[0105] Thereby, as shown in FIG. 9, the side end portions 110X of the pair of hollow polycarbonate plates 100 are held by the holding member 251 in a state of being inclined toward each other toward the inner side in the thickness direction (the aerogel layer 130 side).

[0106] Note that the rigidity of the hollow polycarbonate plate 100 is the flexural rigidity when the hollow polycarbonate plate 100 bends in the Y direction with the side end portions 110X on both sides in the X direction fixed by pins as the fulcrums.

[0107] Here, Fig. 9 and Fig. 12B described later are shown with the degree of bending of the hollow polycarbonate plate 100 larger than the actual degree of bending for clarity.

[0108] The holding member 250 shown in Fig. 10 holds and seals the side end portions 110Z in the width direction along the Z direction of the two hollow polycarbonate plates 100 and seals the outer edge portion 132Z between the two hollow polycarbonate plates 100.

[0109] The holding member 250 shown in Fig. 10 and Fig. 11B has a frame portion 250B and an outer claw portion 250A protruding from the outer end portion of the frame portion 250B.

[0110] The frame portion 250B is provided along the end face 112Z of the side end portion 110Z of the hollow polycarbonate plate 100. The outer claw portion 250A is provided along the outer surface 113Z of the side end portion 110Z. The outer claw portion 250A is orthogonal to the frame portion 250B and is not inclined with respect to the frame portion 250B. Further, the holding member 250 has a higher rigidity than the hollow polycarbonate plate 100. Also, the frame portion 250B has a higher rigidity than the outer claw portion 250A.

[0111] Note that the rigidity of the hollow polycarbonate plate 100 is the flexural rigidity when the hollow polycarbonate plate 100 bends in the Y direction with the side end portions 110Z on both sides in the Z direction fixed by pins as the fulcrums.

[0112] Here, in Fig. 10 and Fig. 13B described later, the two hollow polycarbonate plates 100 are parallel or substantially parallel, but actually the central portions of the two hollow polycarbonate plates 100 bulge slightly outward.

[0113] As shown in Fig. 9, the side ends 110X of the two hollow polycarbonate plates 100 incline inward in the thickness direction. Also, the two hollow polycarbonate plates 100 bulge (expand) outward in the thickness direction from the side ends 110X toward the central part due to the side pressure acting on the two hollow polycarbonate plates 100 from the aerogel layer 130. However, a gap L is formed between the hollow polycarbonate plate 100 and the glass plate 52.

[0114] As shown in Fig. 10, the two hollow polycarbonate plates 100 are parallel or substantially parallel. However, a gap L is formed between the hollow polycarbonate plate 100 and the glass plate 52.

[0115] In addition, the gap at the joint between the holding member 250 and the holding member 251 is filled with a sealing material such as a silicone-based material, a foam material such as a continuous foamed urethane sponge, and a hot melt adhesive, etc., and is sealed to such an extent that the aerogel N does not leak out from the gap.

[0116] Also, the side ends 110X, 110Z of the hollow polycarbonate plate 100 are fixed to the holding members 250, 251 using an adhesive such as a silicone-based sealing material.

[0117] As described above, the holding members 250, 251 seal the outer edge of the light-transmitting member 11.

[0118] (Manufacturing method) Next, an example of the manufacturing method of the light-transmitting member 10 of the present embodiment will be described. Note that the following manufacturing method is an example and can be changed as appropriate.

[0119] First, place the hollow polycarbonate plate 100 with the direction along the rib 104 (see FIG. 15), that is, with the axial direction of the cylindrical hollow portion 106 (see FIG. 15) as the vertical direction. Also, except for the upper side end portion 110Z of the hollow polycarbonate plate 100, join the holding members 250 and 251 to the side end portions 110X and 110Z of the hollow polycarbonate plate 100 to close the lower opening ends of the hollow portion 106 and the aerogel layer 130. Then, fill the hollow portion 106 with aerogel M from the upper opening of the hollow portion 106 of the hollow polycarbonate plate 100.

[0120] FIG. 12A is a horizontal cross-section of the central portion of the hollow polycarbonate plate 100 in the Z direction in the above state. FIG. 13A is a vertical cross-section of the central portion of the hollow polycarbonate plate 100 in the X direction in the above state.

[0121] Furthermore, fill aerogel N between the two hollow polycarbonate plates 100, join the holding member 250 to the upper side end portion 110Z of the hollow polycarbonate plate 100 to close the upper opening ends of the hollow portion 106 and the aerogel layer 130. FIG. 12B is a horizontal cross-section of the central portion of the hollow polycarbonate plate 100 in the Z direction in the above state. FIG. 13B is a vertical cross-section of the central portion of the hollow polycarbonate plate 100 in the X direction in the above state.

[0122] Note that due to the side pressure acting on the hollow polycarbonate plate 100 from the aerogel layer 130, the side end portion 110X of the hollow polycarbonate plate 100 inclines inward in the thickness direction, and bulges (swells) outward in the thickness direction from the side end portion 110X toward the central portion.

[0123] (Function and Effect) Next, the function and effect of this embodiment will be described.

[0124] In the light-transmitting member 10, the side end portions 110X and 110Z of the pair of hollow polycarbonate plates 100 are held by the holding members 251 in a state of being inclined inward in the thickness direction with respect to each other. Therefore, in the present embodiment, compared with the case where the side end portion 110X is not inclined, the pair of hollow polycarbonate plates 100 are prevented from bulging outward by the side pressure acting on the pair of hollow polycarbonate plates 100 from the aerogel layer 130 formed by filling aerogel N between the pair of hollow polycarbonate plates 100. Thus, overfilling of the aerogel N between the pair of hollow polycarbonate plates 100 is prevented or suppressed. Further, since the hollow polycarbonate plates 100 are prevented from approaching or contacting the glass plate 52, the distance L between the hollow polycarbonate plates 100 and the glass plate 52 is ensured.

[0125] Here, in the present embodiment, the holding members 250 and 251 are set such that the bulging of the hollow polycarbonate plates 100 is within a specified value by the holding members 250, 251, etc.

[0126] The setting that the bulging of the hollow polycarbonate plates 100 is within a specified value preferably means that the bulging of the hollow polycarbonate plates 100 in the present embodiment is smaller than the bulging of the hollow polycarbonate plates 100 when the pair of hollow polycarbonate plates 100 are held by the holding member 950 of the comparative example.

[0127] Further, the setting that the bulging of the hollow polycarbonate plates 100 is within a specified value more preferably means that the deviation of the set value of the distance L is within a predetermined range, for example, within 10%. For example, when the set value of the distance L is 10 mm, the setting that the bulging of the hollow polycarbonate plates 100 is within a specified value means a setting within the range of 9 mm to 11 mm. Also, the setting that the bulging of the hollow polycarbonate plates 100 is within a specified value preferably means that the deviation from the set amount of the aerogel N when the aerogel N is filled between the pair of hollow polycarbonate plates 100 without gaps is within a predetermined value, for example, within 10%.

[0128] Further, in the multilayer light-transmitting body 13, a light-transmitting member 11 in which an aerogel layer 130 is formed between a pair of hollow polycarbonate plates 100 is provided in a hollow layer 55 between adjacent glass plates 52. Thereby, the heat insulation property of the multilayer light-transmitting body 12 is improved. Further, the bulging of the pair of hollow polycarbonate plates 100 due to the side pressure acting on the pair of hollow polycarbonate plates 100 from the aerogel layer 130 is suppressed by the holding members 250 and 251 and is kept within a specified value. Therefore, contact between the glass plate 52 and the hollow polycarbonate plate 100 is prevented, so that the heat insulation effect of the multilayer light-transmitting body 13 is improved.

[0129] Further, the side end portions 110X of the pair of hollow polycarbonate plates 100 are held by the holding member 251 in a state of being inclined inward in the thickness direction with respect to each other. Therefore, for example, even in a portion where the side pressure acting on the pair of hollow polycarbonate plates 100 from the aerogel layer 130 is low, such as the upper end portion of the aerogel layer 130, a compressive force is applied from the pair of hollow polycarbonate plates 100 to the aerogel layer 130. Due to this compressive force, vibrations of the aerogel layer 130 and the like are suppressed, so that sedimentation of the aerogel N due to vibrations and the like is prevented or suppressed.

[0130] Further, even if the hollow polycarbonate plate 100 expands due to heat, a compressive force acts from the pair of hollow polycarbonate plates 100 on the aerogel layer 130, so that an effect of suppressing sedimentation of the aerogel N can be obtained.

[0131] Further, the holding member 250 has a higher rigidity than the hollow polycarbonate plate 100. Therefore, even if side pressure acts on the outer claw portion 251A from the aerogel layer 130, the outer claw portion 251A does not collapse. Therefore, the holding member 250 can continue to hold the side end portions 110X of the hollow polycarbonate plates 100 in a state of being inclined inward in the thickness direction with respect to each other.

[0132] <Others> Note that the present disclosure is not limited to the above-described first and second embodiments.

[0133] For example, in the above first and second embodiments, the spacers 21 are provided on all four sides of the glass plate 52. However, the spacers 21 can be omitted as appropriate. When the spacers 21 are omitted, for example, the holding members 151, 251 and the silicone-based sealing material 31 may be directly adhered to each other.

[0134] Also, for example, in the above first and second embodiments, as shown in FIGS. 1, 2, and 10, etc., due to the side pressure acting on the pair of hollow polycarbonate plates 100 from the aerogel layer 130 formed by filling aerogel N between the pair of hollow polycarbonate plates 100, the pair of hollow polycarbonate plates 100 bulge (expand) outward in the thickness direction. However, the pair of hollow polycarbonate plates 100 do not necessarily have to bulge outward in the thickness direction. For example, when the width of one side of the hollow polycarbonate plate 100 is as small as about 50 cm, etc., even after filling aerogel N between the pair of hollow polycarbonate plates 100, the pair of hollow polycarbonate plates 100 hardly bulge, or may maintain the curved state before filling aerogel N between the pair of hollow polycarbonate plates 100.

[0135] Also, for example, in the above first embodiment, the holding members 150, 151 hold both the side end portions 110X and 110Z of the hollow polycarbonate plate 100 in a state of being inclined inward in the thickness direction. However, the holding members 150, 151 may also be configured to hold only one of the side end portions 110X and 110Z in a state of being inclined inward in the thickness direction.

[0136] Also, for example, in the above second embodiment, the holding members 250, 251 hold the side end portion 110 of the hollow polycarbonate plate 100 in a state of being inclined inward in the thickness direction. However, the holding members 250, 251 may also be configured to hold one or both of the side end portions 110X and 110Z in a state of being inclined inward in the thickness direction.

[0137] In addition, the holding members 150, 151, 250, and 251 can be used in appropriate combinations. For example, the holding member 151 and the holding member 251 can be combined, or the holding member 151 and the holding member 250 can be combined.

[0138] Further, the holding member may be configured to hold at least one of the side end portions 110X and 110Z of the hollow polycarbonate plate 100 in a state where it is inclined inward in the thickness direction. For the holding member, for example, grooves may be provided that hold the side end portions 110X and 110Z in a state where they are inclined inward in the thickness direction when the side end portions 110X and 110Z are fitted therein.

[0139] In addition, when the bulge of the hollow polycarbonate plate 100 is not sufficiently suppressed, measures such as narrowing the distance between the two hollow polycarbonate plates 100 or reducing the density of the aerogel N are taken to suppress the bulge of the hollow polycarbonate plate 100. Even if the above measures are taken, by applying the technology of the present disclosure to the two hollow polycarbonate plates 100, the degree of the above measures can be reduced.

[0140] Also, for example, in the first and second embodiments described above, the hollow polycarbonate plate 100 is used as the light-transmitting resin plate. However, the light-transmitting resin plate is not limited to the hollow polycarbonate plate 100. The light-transmitting resin plate may have a hollow portion that can be filled with aerogel, or may not have a hollow portion. The light-transmitting resin plate may be, for example, a solid polycarbonate plate or an acrylic plate, etc. Further, the light-transmitting plate material may be, for example, a glass plate or the like other than the light-transmitting resin plate.

[0141] In addition, when the light-transmitting plate material is a glass plate, it is desirable that the thickness of the light-transmitting plate material (glass plate) (corresponding to the thickness of the hollow polycarbonate plate 100 in FIG. 1) is less than or equal to the thickness of the light-transmitting plate (glass plate 52) (thickness of the light-transmitting plate material (glass plate) ≤ thickness of the light-transmitting plate (glass plate 52)).

[0142] By making the thickness of the translucent plate material (glass plate) equal to or less than the thickness of the translucent plate (glass plate 52) in this way, it is possible to reduce the weight of the translucent plate material (glass plate). As a result, since the workability when filling aerogel N between two translucent plate materials (glass plates) is improved, the manufacturing efficiency of the translucent member 10 is improved. Further, by making the thickness of the translucent plate material (glass plate) equal to or less than the thickness of the translucent plate (glass plate 52), when a multi-layer glass is configured by the translucent plate material (glass plate) and the translucent plate (glass plate 52), the transparency of the multi-layer glass can be increased.

[0143] Further, for example, in the above-described first and second embodiments, two glass plates 52 are provided in the multi-layer translucent bodies 12 and 13. However, the number of glass plates 52 provided in the multi-layer translucent bodies 12 and 13 is not limited to two, and three or more glass plates 52 may be provided in the multi-layer translucent bodies 12 and 13, for example. When three or more glass plates are provided in the multi-layer translucent bodies 12 and 13, the multi-layer translucent bodies 12 and 13 will have a plurality of hollow layers. In this case, a translucent member to which the technology of the present disclosure is applied can be provided in at least one of the plurality of hollow layers.

[0144] Further, for example, in the above-described first and second embodiments, the glass plate 52 is used as the translucent plate. However, the translucent plate is not limited to the glass plate 52. The translucent plate may be made of resin such as an acrylic plate or a polycarbonate plate, for example. Note that a resin-made translucent plate has lower fire resistance or durability than glass, but is lighter than glass.

[0145] Further, the translucent member, the translucent plate, and the translucent plate material only need to allow light to pass through, and may be transparent or translucent.

[0146] Furthermore, the above-described first and second embodiments can be implemented in various modes without departing from the gist of the present disclosure. Also, the above-described first embodiment, second embodiment, and modified examples can be implemented in combination as appropriate.

[0147] Note that the disclosure of Japanese Patent Application No. 2022-065815 filed on April 12, 2022 is incorporated herein by reference in its entirety. All documents, patent applications, and technical standards described in this specification are incorporated herein by reference to the same extent as if each individual document, patent application, and technical standard were specifically and individually indicated to be incorporated by reference.

[0148] Regarding the above first embodiment and second embodiment, the following supplementary notes are disclosed.

[0149] <Supplementary Note 1> A pair of translucent plates arranged opposite to each other, An aerogel layer formed by an aerogel filled between the pair of translucent plates, A holding member that seals the outer edge portion between the pair of translucent plates and holds the side end portions in the width direction of the pair of translucent plates inclined inward in the thickness direction, suppressing the bulging of the pair of translucent plates due to the side pressure acting on the pair of translucent plates from the aerogel layer. A translucent member comprising the above. <Supplementary Note 2> The holding member A frame portion along the end face of the side end portion of the translucent plate, An outer claw portion that protrudes in an inclined state from the outer end portion of the frame portion toward the inside in the thickness direction of the translucent plate and is arranged along the outer surface of the side end portion, having The holding member has a higher rigidity than the translucent plate. The translucent member according to Supplementary Note 1. <Supplementary Note 3> The outer claw portion has a higher rigidity than the translucent plate. The translucent member according to Supplementary Note 2. <Supplementary Note 4> The outer claw portion protrudes from the outer end portions on both sides of the frame portion and is respectively arranged along the outer surface of the side end portion of the pair of translucent plates. The translucent member according to Supplementary Note 2. <Supplementary Note 5> The holding member protrudes in an inclined state from the inner side of the outer end portion in the frame portion toward the inner side in the thickness direction of the translucent plate material, and has an inner claw portion disposed along the inner surface of the side end portion. The translucent member according to any one of Appendices 2 to 4. <Appendix 6> The outer claw portion and the inner claw portion are greater in rigidity than the translucent plate material. The translucent member according to Appendix 5. <Appendix 7> The length of the outer claw portion in the protruding direction is equal to or greater than the length of the inner claw portion in the protruding direction. The translucent member according to Appendix 5. <Appendix 8> The length of the outer claw portion in the protruding direction is the same as the length of the inner claw portion in the protruding direction. The translucent member according to Appendix 5. <Appendix 9> The inner claw portion protrudes from the inner sides of both outer end portions in the frame portion, and is respectively disposed along the inner surfaces of the side end portions of the pair of translucent plate materials. The translucent member according to any one of Appendices 5 to 8. <Appendix 10> The pair of translucent plate materials bulge outward in the thickness direction from the side end portions toward the central portion in the width direction. The translucent member according to any one of Appendices 1 to 9. <Appendix 11> The holding member holds the side end portions on both sides in the width direction of the pair of translucent plate materials respectively. The translucent member according to any one of Appendices 1 to 10. <Appendix 12> The translucent plate material has a plurality of hollow portions filled with aerogel. The translucent member according to any one of Appendices 1 to 11. <Appendix 13> The translucent plate material is A pair of polycarbonate plates facing each other, and A plurality of ribs provided between the pair of polycarbonate plates, connecting the pair of polycarbonate plates and forming a plurality of hollow portions between the pair of polycarbonate plates, having, wherein the hollow portions are filled with aerogel. The light-transmitting member according to any one of Appendices 1 to 11. <Appendix 14> A plurality of light-transmitting plates facing each other and having their edge portions closed, and a light-transmitting member according to any one of Appendices 1 to 13 provided with a space from the light-transmitting plates in a hollow layer between adjacent light-transmitting plates. A multi-layer light-transmitting body comprising the above. <Appendix 15> The light-transmitting plate material and the light-transmitting plate are made of glass plates, wherein the thickness of the light-transmitting plate material is equal to or less than the thickness of the light-transmitting plate. The multi-layer light-transmitting body according to Appendix 14.

[0150] Furthermore, regarding the first and second embodiments described above, the following appendices are disclosed.

[0151] <Appendix 1> A pair of light-transmitting plate materials arranged opposite to each other, an aerogel layer formed by filling aerogel between the pair of light-transmitting plate materials, and a holding member that seals the outer edge portion between the pair of light-transmitting plate materials and holds the side end portions on both sides in the width direction inclined inward in the thickness direction to suppress the bulging of the light-transmitting plate material due to the side pressure of the aerogel layer. A light-transmitting member comprising the above. <Appendix 2> The holding member is a frame portion along the end face of the side end portion of the light-transmitting plate material, and an outer claw portion that protrudes inclined inward in the thickness direction from the outer end portion of the frame portion and extends along the outer surface of the side end portion. having wherein the holding member has a higher rigidity than the light-transmitting plate material. The light-transmitting member according to Appendix 1. <Appendix 3> The holding member projects in an inclined manner from the inner side of the outer end portion in the frame portion toward the inner side in the thickness direction and has an inner claw portion along the inner surface of the side end portion. The light-transmitting member according to Supplementary Note 2. <Supplementary Note 4> The light-transmitting member according to any one of Supplementary Notes 1 to 3 is provided with a space from the light-transmitting plate in a hollow layer between a plurality of light-transmitting plates with the edges closed. Multi-layer light-transmitting body.

Claims

1. A pair of translucent plates arranged opposite to each other, An aerogel layer formed by an aerogel filled between the pair of translucent plates, A holding member that seals the outer edge between the pair of translucent plates and holds the side ends in the width direction of the pair of translucent plates in a state of being inclined inward in the thickness direction, suppressing the warping of the pair of translucent plates due to the side pressure acting on the pair of translucent plates from the aerogel layer, A translucent member comprising.

2. The holding member is A frame portion along the end face of the side end portion of the translucent plate, An outer claw portion that protrudes in an inclined state from the outer end portion of the frame portion toward the inside in the thickness direction of the translucent plate and is arranged along the outer surface of the side end portion, And has The holding member has a higher rigidity than the translucent plate, The translucent member according to claim 1.

3. The outer claw portion has a higher rigidity than the translucent plate, The translucent member according to claim 2.

4. The outer claw portion protrudes from the outer end portions on both sides of the frame portion and is respectively arranged along the outer surface of the side end portions of the pair of translucent plates, The translucent member according to claim 2.

5. The holding member has an inner claw portion that protrudes in an inclined state from the inside of the outer end portion of the frame portion toward the inside in the thickness direction of the translucent plate and is arranged along the inner surface of the side end portion, The translucent member according to claim 2.

6. The outer claw portion and the inner claw portion have a higher rigidity than the translucent plate, The translucent member according to claim 5.

7. The length of the outer claw portion in the protruding direction is equal to or greater than the length of the inner claw portion in the protruding direction, The translucent member according to claim 5.

8. The length of the outer claw portion in the protruding direction is the same as the length of the inner claw portion in the protruding direction, The translucent member according to claim 5.

9. The inner claw portion protrudes from the inside of the outer end portions on both sides of the frame portion and is respectively arranged along the inner surface of the side end portions of the pair of translucent plates, The translucent member according to claim 5.

10. The pair of translucent plates warp outward in the thickness direction from the side end portions toward the central portion in the width direction, The translucent member according to claim 1.

11. The holding member holds the side end portions on both sides in the width direction of the pair of translucent plates respectively, The translucent member according to claim 1.

12. The translucent plate has a plurality of hollow portions filled with aerogel, The translucent member according to claim 1.

13. The light-transmitting plate material is a pair of polycarbonate plates facing each other, a plurality of ribs provided between the pair of polycarbonate plates, connecting the pair of polycarbonate plates, and forming a plurality of hollow portions between the pair of polycarbonate plates, and has an aerogel filled in the hollow portion. The light-transmitting member according to claim 1.

14. A plurality of light-transmitting plates facing each other and having their edges closed, and the light-transmitting member according to any one of claims 1 to 13 provided with a space from the light-transmitting plate in a hollow layer between adjacent light-transmitting plates, and a multi-layer light-transmitting body provided with the same.

15. The light-transmitting plate material and the light-transmitting plate are made of glass plates, and the thickness of the light-transmitting plate material is equal to or less than the thickness of the light-transmitting plate. The multi-layer light-transmitting body according to claim 14.

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