JP7706124B2 - Light-transmitting material - Google Patents

Description

The present invention relates to a light-transmitting member.

Patent Document 1 discloses technology related to insulating glass. In this prior art, a spacer member is interposed between the outer periphery of two opposing glass sheets, and a translucent insulating material is filled in an airtight state between the opposing glass sheets. The translucent insulating material is an aerogel made of silica fine particles.

Patent Document 2 discloses a technology related to a light-transmitting member that uses aerogel. In this prior art, the light-transmitting member comprises a first light-transmitting plate, a second light-transmitting plate, and a translucent region defined between the first and second light-transmitting plates. The translucent region is filled with at least translucent aerogel particles in the section between the first and second light-transmitting plates. The average particle size of the translucent particles is in the range of 0.05 to 0.5 mm.

Japanese Patent Application Publication No. 11-71141 JP 2018-178372 A

In a light-transmitting member in which aerogel is filled between two light-transmitting plates such as glass and the edges are sealed, the volume of the space filled with aerogel increases due to an increase in temperature, etc., and the aerogel granules or particles become closely packed. When the volume subsequently returns to normal, the aerogel settles, which may mar the aesthetic appearance or cause glare.

In view of the above, the present invention aims to provide a light-transmitting member that prevents or suppresses the settling of aerogel in a hollow layer formed between light-transmitting plates whose edges are closed.

The first aspect is a light-transmitting member comprising: a multi-layer light-transmitting body in which a hollow layer is formed between a plurality of light-transmitting plates whose edges are closed; a light-transmitting resin plate provided in the hollow layer and having a hollow portion filled with aerogel; a holding member that holds the outer edge of the light-transmitting resin plate at a distance from the light-transmitting plate; and a buffer portion provided between an end of the light-transmitting resin plate and the holding member and at least one of the ends of the light-transmitting resin plate and the holding member.

In the first embodiment of the light-transmitting member, a light-transmitting resin plate filled with aerogel is provided in the hollow layer of the multi-layered light-transmitting body, thereby improving the heat insulating properties of the light-transmitting member. In addition, a gap is formed between the light-transmitting material and the light-transmitting resin plate, and no thermal bridge is created, improving the heat insulating effect compared to when the two are in contact.

Even if the aerogel-filled light-transmitting resin plate is thermally expanded, the buffer section deforms, preventing or suppressing out-of-plane deformation of the light-transmitting resin plate. Even if the light-transmitting plate deforms out-of-plane due to the pressure difference between the air pressure in the hollow layer of the multi-layered light-transmitting body and the outside air pressure, a gap is formed between the light-transmitting resin plate and the light-transmitting resin plate, preventing or suppressing out-of-plane deformation of the light-transmitting resin plate caused by the out-of-plane deformed light-transmitting plate pushing against the light-transmitting resin plate.

If the translucent resin plate is deformed out of plane, the volume of the hollow space will change. In response to this change in the volume of the hollow space, the aerogel will attempt to pack as closely as possible, which may result in settling of the aerogel.

However, as described above, in the translucent member of this embodiment, out-of-plane deformation of the translucent resin plate is prevented or suppressed, so that settling of the aerogel filled in the hollow portion of the translucent resin plate is prevented or suppressed.

Furthermore, by placing the translucent resin plate in the hollow layer, the pressure acting on the surface of the translucent resin plate is always constant, so the volume of the hollow portion does not change, which also prevents or suppresses the settling of the aerogel.

The second aspect is a translucent member including a multi-layer translucent body in which a hollow layer is formed between a plurality of translucent plates whose edges are closed, a pair of translucent resin plates arranged at a distance in the hollow layer, a holding member that holds the outer edges of the pair of translucent resin plates at a distance from the translucent plates, a buffer section provided between the ends of the pair of translucent resin plates and the holding member and in at least one of the holding members, and an aerogel layer formed by filling the space between the pair of translucent resin plates with aerogel.

In the second embodiment of the light-transmitting member, an aerogel layer is formed by filling aerogel between a pair of light-transmitting resin plates provided in the hollow layer of the multi-layer light-transmitting body, improving the heat insulating properties of the light-transmitting member. In addition, a gap is formed between the light-transmitting body and the transparent resin plate material, and no thermal bridge is created, improving the heat insulating effect compared to when the two are in contact.

Even if the translucent resin plate is thermally expanded, the buffer portion deforms, preventing or suppressing out-of-plane deformation of the translucent resin plate. Even if the translucent resin plate deforms out-of-plane due to the pressure difference between the air pressure in the hollow layer of the multi-layered translucent body and the outside air pressure, a gap is formed between the translucent resin plate and the translucent resin plate, preventing or suppressing out-of-plane deformation of the translucent resin plate caused by the translucent resin plate pushing against the translucent resin plate. Furthermore, even if the translucent resin plate deforms out-of-plane, the pressure generated on the translucent resin plate side surface and the aerogel layer side surface of the translucent resin plate is the same, preventing or suppressing out-of-plane deformation of the translucent resin plate due to the pressure difference.

If the translucent resin plate is deformed out of plane, the volume of the aerogel layer between the pair of translucent resin plates will change. This change in the volume of the aerogel layer will cause the aerogel to behave in a way that attempts to pack as closely as possible, which may result in settling of the aerogel.

In addition, if the translucent resin plate is deformed out of plane, the volume of the hollow space will change. In response to this change in the volume of the hollow space, the aerogel will behave in a way that will attempt to pack as closely as possible, which may result in settling of the aerogel.

However, as described above, in the translucent member of this embodiment, out-of-plane deformation of the translucent resin plate is prevented or suppressed, so that settling of the aerogel in the aerogel layer between the pair of translucent resin plates and the aerogel filled in the hollow portion of the translucent resin plate is prevented or suppressed.

The third aspect is the translucent member according to the second aspect, in which the translucent resin plate has a hollow portion, and the hollow portion is filled with aerogel.

In the third embodiment of the light-transmitting member, the hollow portion of the light-transmitting resin plate is filled with aerogel, improving the heat insulating effect. Furthermore, even if unevenness occurs in the aerogel of the aerogel layer, for example, due to repeated filling operations, the unevenness in the aerogel layer is difficult to notice because the hollow portion of the light-transmitting resin plate is filled with aerogel.

In addition, because out-of-plane deformation of the translucent resin plate is prevented or suppressed, settling of the aerogel filled in the hollow portion of the translucent resin plate is prevented or suppressed.

According to the present invention, it is possible to suppress the settling of aerogel provided in a hollow layer formed between multiple light-transmitting plates whose edges are closed in a light-transmitting member.

FIG. 2 is a cross-sectional view of a light-transmitting member according to the first embodiment. FIG. 11 is a cross-sectional view of a light-transmitting member according to a second embodiment. 1A is a cross-sectional view of a first test specimen, FIG. 1B is a cross-sectional view of a second test specimen, and FIG. 1C is a cross-sectional view of a third test specimen. FIG. 2 is a perspective view of a hollow polycarbonate plate. FIG. 11 is an enlarged cross-sectional view illustrating a main part of a light-transmitting member according to a modified example of the second embodiment.

First Embodiment
A light-transmitting member according to a first embodiment of the present invention will be described.

(structure)
First, the structure of the light-transmitting member of the first embodiment will be described.

The light-transmitting member 10 shown in FIG. 1 is configured to include a double-glazed glass 50 as an example of a multi-layer light-transmitting body, a hollow polycarbonate plate 100 as an example of a light-transmitting resin plate, a holding member 150, and a buffer member 160 as an example of a buffer section. In this embodiment, the light-transmitting member 10 is attached to a window frame 15, but is not limited to this.

The double-glazing glass 50 has a structure in which a hollow layer 54 is formed between two glass plates 52, which are an example of a light-transmitting plate. A spacer 20 is sandwiched between the edges 53 of the two glass plates 52. In this embodiment, the edges 53 of the glass plates 52 and the spacer 20 are adhered with a butyl-based tape material 22, but this is not limited to this. In addition, the outside of the spacer 20 between the edges 53 of the two glass plates 52 is sealed with a silicone-based sealant 30, which is an example of a sealing material.

In addition, the spacer 20 in this embodiment is hollow inside, and the hollow portion is filled with a desiccant (not shown), but it is not limited to this structure.

A hollow polycarbonate plate 100 is provided in the hollow layer 54 of the insulating glass 50. As shown in FIG. 4, the hollow polycarbonate plate 100 of this embodiment is a member in which a number of cylindrical hollow portions 106 are formed side by side by a number of ribs 104 provided between two polycarbonate plates 102.

As shown in FIG. 1, the hollow portion 106 of the hollow polycarbonate plate 100 (see also FIG. 4) is filled with aerogel M.

Here, aerogel is a porous, low-density structure in the form of granules or powder obtained by replacing the solvent contained in the gel with gas using a method such as supercritical drying.

The holding member 150 has a U-shaped cross section and holds the outer edge 110 of the hollow polycarbonate plate 100 with a gap L between it and the glass plate 52. The holding member 150 in this embodiment is made of a resin-based material and has a function of preventing the outflow of the aerogel M filled in the hollow portion 106 (see also FIG. 4) of the hollow polycarbonate plate 100, but is not limited to this. The holding member 150 only needs to have a function of holding the hollow polycarbonate plate 100 in the hollow layer 54 with a gap between it and the glass plate 52. The spacer 20 and the holding member 150 may be separated.

The buffer member 160 is provided between the end 112 of the hollow polycarbonate plate 100 and the holding member 150. In this embodiment, the buffer member 160 is made of a resin tube, but is not limited to this and may be made of, for example, a rubber-based material or a foam material.

(Manufacturing method)
Next, an example of a method for manufacturing the light-transmitting member 10 of this embodiment will be described.

First, the hollow polycarbonate plate 100 is placed in a direction along the ribs 104 (see FIG. 4), i.e., the axial direction of the cylindrical hollow portion 106 (see FIG. 4) is set vertically, and the buffer member 160 and the retaining member 150 are joined except for the upper end portion 112, and the lower open end of the hollow portion 106 is closed.

The hollow portion 106 of the hollow polycarbonate plate 100 is filled with aerogel M from the upper open end.

After all of the hollow sections 106 have been filled with aerogel M, the buffer member 160 and the retaining member 150 are joined to the upper end 112 of the hollow polycarbonate plate 100 to close the upper open end of the hollow section 106.

Next, the hollow polycarbonate plate 100 filled with aerogel M is placed so as to overlap one of the glass plates 52 constituting the horizontally placed double-glazing 50. Spacers 20 are placed along the four periphery of the hollow polycarbonate plate 100, and the one of the glass plates 52 and the spacers 20 are fixed with butyl-based tape material 22.

The other glass plate 52 is placed on top of the hollow polycarbonate plate 100, and the other glass plate 52 and the spacer 20 are fixed together with a butyl-based tape material 22.

Finally, fill the entire outer periphery of the spacer 20 between the edges 53 of the two glass plates 52 with silicone-based sealant 30 to seal it.

(Action and Effects)
Next, the function and effect of the light-transmitting member 10 of this embodiment will be described.

The insulating properties of the light-transmitting member 10 are improved by providing a hollow polycarbonate plate 100 filled with aerogel M in the hollow layer 54 of the insulating glass 50. In addition, a gap L is formed between the glass 52 and the hollow polycarbonate plate 100, and no thermal bridge is created, improving the insulating effect compared to when the two are in contact.

Even if the hollow polycarbonate plate 100 filled with aerogel M is thermally expanded, the buffer member 160 deforms, thereby preventing or suppressing out-of-plane deformation of the hollow polycarbonate plate 100. Even if the glass plate 52 deforms out-of-plane due to the pressure difference between the air pressure in the hollow layer 54 of the insulating glass 50 and the outside air pressure, the gap L is formed between the hollow polycarbonate plate 100 and the glass plate 52, which has been deformed out-of-plane, pressing against the hollow polycarbonate plate 100, thereby preventing or suppressing out-of-plane deformation of the hollow polycarbonate plate 100.

If the hollow polycarbonate plate 100 is deformed out of plane, the volume of the hollow portion 106 will change. In response to this change in the volume of the hollow portion 106, the aerogel M will behave in a way that attempts to pack as closely as possible, which may result in settling of the aerogel M.

However, as described above, in the light-transmitting member 10 of this embodiment, out-of-plane deformation of the hollow polycarbonate plate 100 is prevented or suppressed, so that settling of the aerogel M filled in the hollow portion 106 of the hollow polycarbonate plate 100 is prevented or suppressed.

Second Embodiment
Next, a light-transmitting member according to a second embodiment of the present invention will be described. Note that the same members as those in the first embodiment are given the same reference numerals, and duplicated descriptions will be omitted or simplified.

(structure)
First, the structure of the light-transmitting member of the second embodiment will be described.

The light-transmitting member 12 shown in FIG. 2 is configured to include a double-glazed glass 51 as an example of a multi-layer light-transmitting body, two hollow polycarbonate plates 100 as an example of light-transmitting resin plates, holding members 151 and 152, a first buffer member 161 and a second buffer member 162 as an example of a buffer section, and an aerogel layer 130. In this embodiment, the light-transmitting member 12 is attached to a window frame 16, but is not limited to this.

The double-glazing glass 51 has a structure in which a hollow layer 55 is formed between two glass plates 52, which are an example of a light-transmitting plate. A spacer 21 is sandwiched between the edges 53 of the two glass plates 52. In this embodiment, the edges 53 of the glass plates 52 and the spacer 21 are adhered with a butyl-based tape material 22, but this is not limited to this. In addition, the outside of the spacer 21 between the edges 53 of the two glass plates 52 is sealed with a silicone-based sealant 31, which is an example of a sealing material.

In this embodiment, the spacer 21 is hollow and filled with a desiccant (not shown), but is not limited to this structure.

The hollow portion 106 of the hollow polycarbonate plate 100 is filled with aerogel M. Two hollow polycarbonate plates 100 are provided at a distance from each other in the hollow layer 55 of the insulating glass 51.

The holding member 151 is composed of two holding parts 151A with a U-shaped cross section and a connecting part 151B that connects the two holding parts 151A.

The holding member 152 is composed of two holding portions 151A with a U-shaped cross section, a connecting portion 151B connecting the two holding portions 151A, and a second buffer member 162. In this embodiment, the second buffer member 162 is sandwiched and joined between the two holding portions 151A and the connecting portion 151B. Note that the second buffer member 162 and the connecting portion 151B do not have to be joined. In other words, the two may simply be in contact.

The holding portions 151A of the holding members 151 and 152 each hold the outer edge portions 110 of the two hollow polycarbonate plates 100, so that the hollow polycarbonate plate 100 is provided in the hollow layer 55 with a distance L between it and the glass plate 52.

In this embodiment, the holding members 151 and 152 are made of a resin-based material and have the function of preventing the aerogel M filled in the hollow portion 106 of the hollow polycarbonate plate 100 from leaking out, but are not limited to this. The holding members 151 and 152 only need to have the function of holding at least two hollow polycarbonate plates 100 in the hollow layer 55 with a gap L between them and the glass plate 52.

The first buffer member 161 is provided between the end 112 of the hollow polycarbonate plate 100 and the holding portion 151A of the holding members 151 and 152. The first buffer member 161 is the same member as the buffer member 160 of the first embodiment (see FIG. 1).

The second buffer member 162 is provided within the holding member 152, specifically, between the holding portion 151A and the connecting portion 151B as described above, so that both ends are in contact with the glass plate 52.

In this embodiment, the first buffer member 161 and the second buffer member 162 are both made of resin tubes, but are not limited to this and may be made of, for example, a rubber-based material or a foam material. The spacer 21 and the holding member 151 may be separated from each other.

The aerogel layer 130 is formed by filling the space between two hollow polycarbonate plates 100 with aerogel N.

The aerogel N filled in the aerogel layer 130 between the two hollow polycarbonate plates 100 may contain aerogel with an average particle size of about 1 mm to 5 mm, or may contain aerogel with an average particle size of 1 mm or less. It may also contain aerogel mixed with opaque silica particles.

The aerogel N filled in the aerogel layer 130 and the aerogel M filled in the hollow portion 106 of the hollow polycarbonate plate 100 may be the same, or may have different particle sizes, mixing ratios of opaque silica, etc.

The structure in FIG. 2 is an example and is not limited thereto. For example, as in the modified example shown in FIG. 5, a structure in which a holding member 159 is provided between the connecting portion 151B of the holding member 151 and the spacer 21 may be used. A second buffer member 162 may be provided between the connecting portion 151B and the holding portion 159.

(Manufacturing method)
Next, an example of a method for manufacturing the light-transmitting member 12 of this embodiment will be described.

Two hollow polycarbonate plates 100 filled with aerogel M are manufactured in the same manner as in the first embodiment. Specifically, the two hollow polycarbonate plates 100 are installed with the direction along the ribs 104 as the vertical direction, and the buffer members 161, 162 and the holding members 151, 152 are joined except for the upper end 112, and the lower open end of the hollow portion 106 and the aerogel layer 130 is sealed.

The hollow portion 106 of the hollow polycarbonate plate 100 is filled with aerogel M from the upper open end. Furthermore, aerogel N is filled between the two hollow polycarbonate plates 100.

After the filling of aerogel M and aerogel N is completed, the buffer member 161 and the holding member 151 are joined to the upper end 112 of the hollow polycarbonate plate 100 to close the upper open end of the hollow portion 106 and the aerogel layer 130.

Next, two hollow polycarbonate plates 100 filled with aerogel M and aerogel N are placed so as to overlap one of the glass plates 52 that make up the horizontally placed double-glazing 51. Spacers 21 are placed around the four periphery of the hollow polycarbonate plate 100, and the one of the glass plates 52 and the spacers 21 are fixed with butyl-based tape material 22.

The other glass plate 52 is placed on top of the hollow polycarbonate plate 100, and the other glass plate 52 and the spacer 21 are fixed together with a butyl-based tape material 22.

Finally, fill the entire outer periphery of the spacer 21 between the edges 53 of the two glass plates 52 with silicone-based sealant 31 to seal it.

(Action and Effects)
Next, the function and effect of the light-transmitting member 12 of this embodiment will be described.

In the light-transmitting member 12, aerogel N is filled between two hollow polycarbonate plates 100 filled with aerogel M provided in the hollow layer 55 of the insulating glass 51 to form an aerogel layer 130, thereby improving the thermal insulation of the light-transmitting member 12. In addition, a gap L is formed between the glass plate 52 and the hollow polycarbonate plate 100, and no thermal bridge is formed, so the thermal insulation effect is improved compared to when the two are in contact.

Even if the hollow polycarbonate plate 100 is thermally expanded, the first buffer member 161 and the second buffer member 162 are deformed, thereby preventing or suppressing out-of-plane deformation of the hollow polycarbonate plate 100. Even if the glass plate 52 is deformed out-of-plane due to the pressure difference between the air pressure in the hollow layer 55 of the insulating glass 51 and the outside air pressure, the gap L is formed between the hollow polycarbonate plate 100 and the glass plate 52 that has been deformed out-of-plane and presses the hollow polycarbonate plate 100, preventing or suppressing out-of-plane deformation of the hollow polycarbonate plate 100. Furthermore, even if the glass plate 52 is deformed out-of-plane, the pressure generated on the glass plate 52 side surface and the aerogel layer 130 side surface of the hollow polycarbonate plate 100 is the same, so that out-of-plane deformation of the hollow polycarbonate plate 100 due to the pressure difference is prevented or suppressed.

Here, if the hollow polycarbonate plate 100 is deformed out of plane, the volume of the aerogel layer 130 between the two hollow polycarbonate plates 100 will change. Then, in response to this change in the volume of the aerogel layer 130, the aerogel N will behave in such a way as to try to pack as closely as possible, which may cause settling of the aerogel N.

In addition, if the hollow polycarbonate plate 100 is deformed out of plane, the volume of the hollow portion 106 will change. In response to this change in the volume of the hollow portion 106, the aerogel M will behave in a way that attempts to pack as closely as possible, which may result in settling of the aerogel M.

However, as described above, in the light-transmitting member 12 of this embodiment, out-of-plane deformation of the hollow polycarbonate plate 100 is prevented or suppressed, so that settling of the aerogel N filled in the aerogel layer 130 between the two hollow polycarbonate plates 100 and the aerogel M filled in the hollow portion 106 of the hollow polycarbonate plate 100 is prevented or suppressed.

In addition, even if unevenness occurs in the aerogel N of the aerogel layer 130 due to, for example, repeated filling operations, the unevenness in the aerogel layer 130 is difficult to notice because the hollow portion 106 of the hollow polycarbonate plate 100 is filled with aerogel M.

<Experiment using test specimen>
Next, an experiment will be described regarding the presence or absence of aerogel settling in the test specimens.

First, we will explain the structures of the first test body 510, the second test body 520, and the third test body 530 shown in Figure 3.

(First test piece)
The first test piece 510 shown in Fig. 3(A) has a structure in which aerogel N is filled in a hollow layer 552 of a double-glazing unit 550 to form an aerogel layer 132. The double-glazing unit 550 has a structure in which a hollow layer 55 is formed between two glass plates 52 each having a size of 300 mm square and a thickness of 6 mm. A spacer 24 is sandwiched between the edges 53 of the two glass plates 52. The spacer 24 is made of wood. The outside of the spacer 24 between the edges 53 of the two glass plates 52 is sealed with a silicone-based sealant 34.

(Second test piece)
The second test specimen 520 shown in Fig. 3(B) has a configuration in which two hollow polycarbonate plates 100, the hollow portions 106 of which are filled with aerogel M, are provided at a distance from each other in the hollow layer 552 of a double-glazing unit 550, and aerogel N is filled between the two hollow polycarbonate plates 100 to form an aerogel layer 130. The two hollow polycarbonate plates 100 are held by a holding member 151, but no first buffer member 161 (see Figs. 2 and 3(C)) or the like is provided between the end portion 112 and the holding member 151.

(Third test specimen)
The third test piece 530 shown in Figure 3 (C) has a configuration in which a first buffer member 161 is provided between the ends 112 of the two hollow polycarbonate plates 100 of the second test piece 520 (see Figure 3 (B)) and the retaining member 151.

The aerogel N used in the first test specimen 510, the second test specimen 520, and the third test specimen 530 was a mixture of silica aerogel with an average particle size of about 0.4 mm and silica aerogel with an average particle size of about 1.5 mm. The second test specimen 520 and the third test specimen 530 may also have a retaining member 159 between the connecting portion 151B of the retaining member 151 and the spacer 24, as in the modified example of the second embodiment in FIG. 5.

(Test Method)
The first test body 510, the second test body 520, and the third test body 530 are placed in a constant temperature bath in a vertical direction (the out-of-plane direction is horizontal),
After a cycle of increasing the temperature from 20° C. to 80° C. over 2 hours, maintaining the temperature at 80° C. for 1 hour, and decreasing the temperature from 80° C. to 20° C. over 2 hours, the appearance was observed.

(Test Results)
First test piece 510
The silica aerogel with an average particle size of about 1.5 mm constituting the aerogel N settled, and an air layer of about 5 cm was generated above the hollow layer 552 .

Second test piece 520
No settling occurred in either the silica aerogel having an average particle size of about 0.4 mm or the silica aerogel having an average particle size of about 1.5 mm that constitutes the aerogel N. However, residual deformation thought to be due to thermal elongation occurred in the hollow polycarbonate plate 100.

Third test piece 530
There were no noticeable changes.

＜Other＞
The present invention is not limited to the above embodiment.

For example, in the translucent member 10 of the first embodiment, the buffer member 160 is provided at both ends 112 of the hollow polycarbonate plate 100, but this is not limited thereto. It may be provided at only one end 112. Also, a buffer member may be provided within the holding member 150, as in the second buffer member 162 of the second embodiment. Also, if a buffer member is provided within the holding member 150, the buffer member 160 may not be provided.

For example, in the translucent member 12 of the second embodiment, the first buffer member 161 is provided at both ends 112 of the hollow polycarbonate plate 100, but this is not limited to the above. It may be provided at only one end 112. The second buffer member 162 may be provided within the holding member 151, or may not be provided at all. If the second buffer member 162 is provided, the first buffer member 161 may not be provided.

In addition, the second buffer member 162 made of a resin tube or the like is provided inside the holding member 152, but is not limited to this. An air layer may be provided inside the holding member, and this air layer may function as a buffer section.

In short, it is sufficient that a buffer section that has the function of suppressing or preventing out-of-plane deformation of the hollow polycarbonate plate 100 by deforming and absorbing the thermal expansion of the hollow polycarbonate plate 100 is provided at least one between the end 112 of the hollow polycarbonate plate 100 and the holding member and within the holding member.

For example, in the above embodiment, a hollow polycarbonate plate 100 is used as the translucent resin plate, but this is not limited thereto. Any translucent resin plate having a hollow portion that can be filled with aerogel may be used. In the second embodiment, the translucent resin plate may not have a hollow portion.

In addition, for example, in the above embodiment, the insulating glass 50, 51 uses two glass plates 52, but is not limited to this and may be constructed using three or more glass plates 52. When constructed using three or more glass plates, it has multiple hollow layers, and it is sufficient to provide a translucent resin plate to which the present invention is applied in at least one of the multiple hollow layers.

For example, in the above embodiment, a glass plate 52 is used as the light-transmitting body, but this is not limiting. A light-transmitting body other than glass, for example a resin light-transmitting body such as an acrylic plate or a polycarbonate plate, may also be used. Note that a resin light-transmitting body has lower fire resistance and durability than glass, but is lighter than glass.

The translucent member, translucent plate, and translucent resin plate may be transparent, translucent, or opaque as long as they transmit light.

Furthermore, the present invention may be implemented in various ways without departing from the spirit of the invention. Multiple embodiments and variations may be implemented in combination as appropriate.

10 Light-transmitting member 12 Light-transmitting member 50 Double-glazing (an example of a double-layer light-transmitting body)
51 Double-glazing (an example of a double-layered light-transmitting body)
52 Glass plate (an example of a light-transmitting plate)
54 Hollow layer 55 Hollow layer 100 Hollow polycarbonate plate (an example of a light-transmitting resin plate)
106 Hollow portion 110 Outer edge portion 112 End portion 130 Aerogel layer 150 Holding member 151 Holding member 152 Holding member 160 Cushioning member (an example of a cushioning portion)
161 First buffer section (an example of a buffer section)
162 Second cushioning member
L Spacing M Aerogel N Aerogel

Claims (6)

a multi-layered light-transmitting body formed by bonding two light-transmitting plates with a spacer between their edges;
a light-transmitting resin plate provided in a hollow layer surrounded by the two light-transmitting plates and the spacer , the hollow portion of which is filled with aerogel;
a holding member disposed in the hollow layer along an inner surface of the spacer and holding an outer edge of the light-transmitting resin plate at a distance from the light-transmitting plate;
a buffer section provided between an end of the light-transmitting resin plate and the holding member and/or in the holding member;
A light-transmitting member comprising: A multi-layered transparent body formed by bonding two transparent plates with a spacer between their edges.
a pair of light-transmitting resin plates provided at an interval in a plate thickness direction in a hollow layer surrounded by the two light-transmitting plates and the spacer ;
a holding member disposed in the hollow layer along an inner surface of the spacer and holding an outer edge of the light-transmitting resin plate at a distance from the light-transmitting plate;
a buffer member provided between the ends of the pair of light-transmitting resin plates and the holding member and in at least one of the holding members;
an aerogel layer formed by filling a first aerogel between the pair of light-transmitting resin plates;
A light-transmitting member comprising: The light-transmitting resin plate has a hollow portion, and the hollow portion is filled with a second aerogel.
The light-transmitting member according to claim 2 . The average particle size of the first aerogel is different from the average particle size of the second aerogel.
The light-transmitting member according to claim 3 . The pressure generated on the surface of the translucent resin plate facing the translucent plate and the surface of the aerogel layer facing the translucent resin plate due to the out-of-plane deformation of the translucent plate is set to be the same.
The light-transmitting member according to any one of claims 2 to 4. The cushioning member is made of either a rubber material or a foam material.
The light-transmitting member according to any one of claims 2 to 5.