JP2017100931A - Glass panel and manufacturing method of the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a glass panel capable of controlling visibility while securing sufficient natural lighting and having an excellent designability.SOLUTION: A glass panel is formed by placing a planar glass plate on a projection part 12 having multiple dot-shaped or line-shaped apexes 13 and then heated to bend a part bridged between the apexes 13 of the projection part 12, has a uniform thickness, multiple concavity parts 2 and convex parts 3 on one side 1a, and convex parts corresponding to the convex parts 2 on the side 1a and concavity parts corresponding to the convex parts 3 on the side 1a, and smooth surfaces of a front surface and a rear surface excluding a deepest part of the concavity part supported by the apexes 13 of the projection part 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a glass panel having a concavo-convex pattern used for a wall material of a building and the like and a manufacturing method thereof.

By attaching a plurality of fine concavo-convex patterns to a glass panel used for a wall or window of a building, it is possible to have an effect of making it difficult to see the inside from the outside of the building while ensuring a certain degree of lighting. Such glass panels include rubbed glass and template glass.
In Patent Document 1, as a method for producing a translucent and smooth plate glass, a surface having a Ra of 5.0 μm or less is obtained by grinding one surface of a transparent and flat float glass with an abrasive such as sand. Is described.
Patent Document 2 discloses a method for producing a template glass having a template pattern on one side and smooth on the other side by roll-out molding. It describes that it is formed with a pair of forming rolls composed of smooth rolls, and the surface having the glass ribbon pattern is slid on the corrugated contact surface of the delivery plate.

JP 2000-317786 A JP 2009-51698 A

In the plate glass described in Patent Document 1, since it is an uneven surface obtained by grinding the entire glass surface, light is refracted by the uneven surface, and a substance on the other side of the glass cannot be visually recognized. Also in the template glass described in Patent Document 2, since the entire glass surface is an uneven surface obtained by being pressed by the mold roll, fine unevenness due to being pressed on the roll surface occurs along with the unevenness due to the outer shape of the mold roll. . For this reason, even in the template glass described in Patent Document 2, the light is refracted by the fine irregularities on the surface along with the refraction of the light on the irregular surface by the die roll, and the substance beyond the glass cannot be visually recognized.
In such a glass panel with surface irregularities, the visible light transmittance is hardly changed, but the visibility is greatly reduced, the image seen through the glass panel is hardly recognized, and the design is also poor. Further, in the case of the rubbed glass as in Patent Document 1, when water adheres to the uneven surface, there is also a problem that the transparency is changed only at the adhering portion and the design property is impaired.

  This invention is made | formed in view of such a situation, and it aims at providing the glass panel which controls visibility and is excellent in the designability, maintaining a high visible light transmittance | permeability.

  The glass panel of the present invention has a uniform plate thickness, and has a plurality of concave portions and convex portions on one surface, and a convex portion corresponding to the concave portion on the one surface on the other surface, and A concave portion corresponding to the convex portion on the one surface is provided, and the front surface and the back surface are smooth surfaces except for the deepest portion of the concave portion on either surface.

Since this glass panel has a smooth surface almost entirely on the front and back surfaces, it has the same visible light transmittance as flat float glass, has excellent daylighting properties, and has concave and convex portions with a uniform thickness. Since the direction of light refraction differs depending on the part, the object on the opposite side of the glass panel looks distorted, and multiple concave and convex parts are formed, making it unique that the whole is swaying. It can be visually recognized with the pattern and is excellent in design. As will be described later, the smooth surface is a portion that is not in contact with the projections of the molding die during molding, and is a smooth surface made with fire.
This glass panel usually has a plate thickness of 2 mm or more and 26 mm or less, and a tolerance of ± 0.2 mm or more and ± 1.2 mm or less. In this case, the tolerance decreases as the plate thickness decreases, and the tolerance increases as the plate thickness increases.
In this case, the concave portion on one surface and the convex portion on the other surface are curved surfaces whose curvature radii correspond to the difference in thickness, but the concave portion and convex portion on one surface, or the convex portion on the other surface. The radius of curvature of the portion and the recess is not necessarily the same.

  The glass panel of this invention WHEREIN: The pitch between the said convex parts of said one surface is 30 mm or more and 800 mm or less, and the depth of the said recessed part in said one surface is 1/150 or more and 1/5 or less of the said pitch. Good.

  By using this glass panel as the wall material by setting the pitch between the convex portions and the depth of the concave portions within this range, the object on the opposite side of the glass panel and the background thereof can be visually recognized with appropriate distortion, and the design effect Can be increased sufficiently.

In the glass panel of the present invention, a compressive stress layer is preferably formed on the front surface and the back surface.
It is a so-called chemically tempered glass, has high wind pressure strength, and is suitable for building wall materials.

Moreover, this invention can be set as the laminated glass panel by which the above-mentioned glass panel was bonded together in the state which engaged the said convex part of the other glass panel with the said concave part of one glass panel.
By adopting a structure in which a plurality of glass panels are bonded together, the impact resistance is improved, and it is difficult to cause scattering when broken, and safety is improved. There is an adhesive layer between each glass panel. By using this adhesive layer with almost the same refractive index and light transmittance as glass, impact resistance is maintained without sacrificing lighting and visibility. Can be increased.

Furthermore, the present invention can be a multi-layer glass panel in which a plurality of the above-described glass panels are opposed to each other with a space therebetween, and the peripheral edges of these glass panels are sealed.
By setting it as a multilayer glass panel, heat insulation performance is improved by the sealed intermediate | middle layer between each glass panel. The intermediate layer between the glass panels may be an air layer, a vacuum layer, or an inert gas such as argon. Moreover, you may enclose a hygroscopic agent in the peripheral part of an intermediate | middle layer.

  Further, the method for producing a glass panel of the present invention comprises preparing a molding die in which projections having a plurality of dot-like or linear apexes are erected at intervals, and the projections of the molding die After bending the portion spanned between the tops of the protrusions by heating the plate glass on the protrusions to a softening temperature or higher by preparing a flat plate glass on the top And a deformation step for cooling.

  When a glass panel is manufactured in this way, the portion in contact with the plate glass is only a part of the tip of the projection, so that almost the entire front and back surfaces are formed on a smooth surface that is made of fire like float glass. In addition, since the portion spanned between the tops of the protrusions is formed by bending, a glass panel having a plurality of recesses and projections and having a uniform thickness can be obtained. .

In the method for producing a glass panel of the present invention, in the preparation step, a plurality of glass panels are mounted by placing the plate glass on the projection in a state where the plate glass is further superimposed on the plate glass via a release agent. Can be manufactured at the same time.
And since the glass panel manufactured in this way is formed in the surface shape in which the surface which was piled up was almost reversed by both glass panels, it can be easily processed into a laminated glass panel or a multilayer glass panel. it can.

  In the glass panel of the present invention, the front and back surfaces of the glass that are not in contact with the projections of the mold are smooth surfaces that are made with fire. Since the plurality of concave portions and convex portions are formed with the plate thickness, the object on the opposite side of the glass panel looks distorted and can be visually recognized with a unique pattern that is swaying as a whole, and is excellent in design.

It is a perspective view of the glass panel of 1st Embodiment of this invention. It is a perspective view which shows the glass panel of FIG. 1 in contrast with the shaping | molding die. It is sectional drawing which shows the manufacturing method of the glass panel of 1st Embodiment in order of (a) (b). It is a whole perspective view of the shaping | molding die of FIG. (A) is a schematic diagram which shows the state which visually recognized the other side through the glass panel of 1st Embodiment, (b) is a schematic diagram which shows the state visually recognized through flat glass. It is a perspective view which shows the glass panel of 2nd Embodiment of this invention, and its shaping | molding die. It is sectional drawing which shows the manufacturing method of the glass panel of 2nd Embodiment in order of (a) (b). It is a whole perspective view of the shaping | molding die of FIG. It is sectional drawing which shows the laminated glass panel of 3rd Embodiment of this invention. It is an enlarged view of the principal part of FIG. It is sectional drawing which shows the state in the middle of manufacturing two glass panels. It is an enlarged view of the principal part of FIG. It is sectional drawing which shows the multilayer glass panel of 4th Embodiment of this invention. It is an enlarged view of the principal part of FIG. It is a perspective view which shows the modification which made the shape of the projection part the hexagonal shape of front view with respect to the shaping | molding die shown in FIG. It is a perspective view which shows the modification which made the shape of the projection part the hexagonal shape of the front view with respect to the shaping | molding die shown in FIG.

Hereinafter, embodiments of a glass panel according to the present invention will be described with reference to the drawings.
1 to 4 show a glass panel 1 according to the first embodiment and a mold 11 used in the production thereof. As shown in FIGS. 1 and 2, the glass panel 1 is formed in a rectangular plate shape as a whole, but a plurality of concave portions 2 and convex portions 3 are formed on the entire surface of one surface 1a. The other surface 1b has a convex portion 4 corresponding to the concave portion 2 of the one surface 1a and a concave portion 5 corresponding to the convex portion 3 of the one surface 1a, and is formed to have a uniform plate thickness as a whole. . The composition of the glass panel is not particularly limited, but the visible light transmittance measured according to JIS R3106 is 75% or more, preferably 80% or more, more preferably 84% or more. Examples of the panel include a soda lime glass panel and a high transmission glass panel in which the iron content is reduced from soda lime glass.

The concave portion 2 formed on one surface 1a has a shape substantially forming a part of the concave surface of the spherical shell, and the concave portion 2 is formed so as to be aligned vertically and horizontally. They are formed in a straight line. That is, the individual recesses 2 are formed by being separated by the projections 3, and the projections 3 may be formed by undulations on the four rectangular sides of the glass panel 1, but are not separated as a whole and are continuous. Is formed.
The convex portion 4 formed on the other surface 1b with respect to the one surface 1a is substantially in the shape of a part of the spherical shell convex surface, aligned vertically and horizontally, and separated by the concave portion 5, The concave portion 5 is formed in a straight line between the convex portions 4.

The glass panel 1 has a thickness t of 2 mm or more and 26 mm or less, and a tolerance of ± 0.2 mm or more and ± 1.2 mm or less. In this case, the tolerance decreases as the plate thickness t decreases, and the tolerance increases as the plate thickness t increases. Specifically, the tolerance is ± 0.2 mm when the plate thickness is 2 mm, and the tolerance is ± 1.2 mm when the plate thickness is 26 mm. Further, on one surface (the upper surface in FIG. 1) 1a, the pitch p between the convex portions 3 is 30 mm or more and 800 mm or less, and the depth d of the concave portions 2 is 1/150 or more and 1/5 or less of the pitch p. 2 mm or more and 160 mm or less. Preferably, the pitch p is 150 mm or more and 600 mm or less, the depth d is 1/80 or more and 1/6 or less of the pitch p, and the depth is 5 mm or more and 100 mm or less, more preferably, the pitch p is 300 mm or more and 400 mm or less, The depth d is 1/40 or more and 1/10 or less of the pitch p, and is 7.5 mm or more and 90 mm or less.
On the other surface (lower surface in FIG. 1) 1b, the pitch between the concave portions 5 is formed to be the same as the pitch p between the convex portions 3 of one surface 1a, and the height of the convex portion 4 is the same as that of the one surface 1a. It is formed substantially the same as the depth d of the recess 2.
Since the plate thickness is substantially uniform, the concave portion 2 of one surface 1a and the convex portion 4 of the other surface 1b are curved surfaces whose curvature radii correspond to the difference of the plate thickness. However, the curvature radius of the concave portion 2 and the convex portion 3 on the one surface 1a or the convex portion 4 and the concave portion 5 on the other surface 1b is not necessarily the same.

  The concave portion 2 of the one surface 1a is formed by bending between the supporting points in a state where the back surface of the flat plate-like plate glass (float plate glass) is partially supported by the mold 11 as will be described later. For this reason, this one surface 1a has the same smooth surface shape as that of a normal float plate glass because neither the concave portion 2 nor the convex portion 3 is brought into contact with the molding die 11 at all. Further, the other surface (back surface) 1b also has a convex portion 4 corresponding to the concave portion 2 of one surface 1a and one surface of the one surface 1a except for the linear local portion (deepest portion) supported at the time of molding in the concave portion 5. Since most of the surface shape of the concave portion 5 corresponding to the convex portion 3 is formed without contacting the mold 11, it is the same smooth surface shape as the float plate glass. The smooth surface has a surface roughness Ra of 0.2 nm to 3 nm.

Next, the manufacturing method of this glass panel 1 is demonstrated.
The glass raw material is the same as that used for general float glass, and soda lime glass or high transmission glass with reduced iron content from soda lime glass is melted in a melting furnace and filled with tin. It is sent out to the surface of the float bath, sent while floating over the molten tin in a band shape, taken out by a roll, and gradually cooled to form a flat plate glass (float plate glass) 10.

This plate glass 10 is mounted on the shaping | molding die 11 shown in FIGS.
The mold 11 is made of metal such as stainless steel. In the example shown in the drawing, a plurality of strip-shaped plate members 12 are formed along the vertical direction, and these protrusions 12 are spaced from each other. The vertical and horizontal projections 12 and the horizontal projections 12 are orthogonal to each other, and are combined to form a rectangular lattice shape as a whole when viewed from the front to form a frame. Each protrusion 12 has the same height, and the top 13 at the upper end is rounded into a semicircular cross-sectional shape to serve as a support for supporting the glass sheet 10 as will be described later. The height of the vertices of the arc is aligned. A space 14 having a rectangular cross section is formed between the protrusions 12.
And the surface formed by the vertex in the top part 13 of these projection parts 12 is made into the plate glass mounting surface 15. FIG.

In order to manufacture the glass panel 1, first, the flat plate glass 10 mentioned above is mounted on the plate glass mounting surface 15 of this shaping | molding die 11, as shown to Fig.3 (a) (preparation process). On the plate glass mounting surface 15, the plate glass 10 is supported in a linear shape having a lattice shape by the top portions 13 of the protrusions 12, and a portion between the top portions 13 is arranged in a state of being bridged above the space portion 14. The
Then, the plate glass 10 is heated to a glass softening temperature (for example, 730 ± 10 ° C. with soda lime glass) or more while being placed on the mold 11. When the plate glass 10 is softened on the mold 11, the space 14 is formed between the linear top portions 13 of the protrusions 12, so that the plate glass 10 has the protrusions 12 as shown in FIG. The portion spanned between the top portions 13 hangs down into the space portion 14 due to its own weight, and is bent into a concave shape between the top portions 13. And if the heating to the plate glass 10 is stopped and cooled, the glass panel 1 having a plurality of partial concave portions 2 and convex portions 3 on its upper surface is formed (deformation step).

By controlling the heating temperature and time for the glass sheet 10 on the mold 11, the recess 2 can be made to an arbitrary depth, and the glass panel 1 having a desired shape can be molded. Further, the contact of the plate glass 10 with the mold 11 is limited to the vicinity of the top of the semicircular arc in the top portion 13 of the protrusion 12 on the back surface of the plate glass 10, and the entire upper surface and most of the back surface are formed by the mold. 11 and other members without contact. Therefore, the molded glass panel 1 is formed on the same smooth surface as the float glass on both the front and back surfaces.
Note that a release agent or the like may be applied to the surface of the top portion 13 before placing the plate glass 10.

The glass panel 1 manufactured in this way is used as a wall material of a building, for example. As described above, the portions of the glass that are not in contact with the protrusions 12 of the mold 11 are formed on a smooth surface that is almost the same as the float glass on both the front and back surfaces, so that the visible light transmittance of the float glass is maintained. It is excellent in daylighting and can take in a sufficient amount of light from the outside. Moreover, since the concave portions 2 and 5 and the convex portions 3 and 4 are formed on the front and back surfaces with a uniform plate thickness, the direction of light refraction varies depending on the part. When viewed, the object and background on the opposite side appear distorted. Moreover, since the recessed parts 2 and 5 and the convex parts 3 and 4 are formed in multiple numbers, it can be visually recognized with the unique pattern which the whole fluctuates, and is excellent in design property.
(Explanation of daylighting)
The daylighting property can be evaluated according to the visible light transmittance measurement of JIS R3106. The higher the visible light transmittance, the higher the daylighting property.
(Description of visibility)
The visibility is 1 to 5 m from a glass panel serving as a test specimen, in accordance with the perspective distortion test of JIS R3202, and a 900 mm square zebra plate in which a plurality of black lines with an angle of 45 ° and a width of 20 mm are arranged at 20 mm intervals on a white background. It can be evaluated by installing it at a distance, observing the zebra plate over the specimen, and measuring the degree of distortion of the black line.
FIG. 5 shows how the glass panel 1 is used as a wall material of a building and a plurality of chairs arranged inside are visually recognized from the opposite side, and (a) shows the glass of the embodiment. The scenery seen through the panel is shown, and (b) shows the scenery seen through the smooth glass. As described above, in the case of the glass panel of the embodiment, although it can be recognized that the chair exists, the whole is swaying and exhibits a unique design.

FIGS. 6-8 has shown the glass panel 21 of 2nd Embodiment, and the shaping | molding die 31 used in the case of the manufacture. In these drawings, the same reference numerals are given to the same parts as those in the first embodiment, and the description will be simplified.
As shown in FIGS. 6 and 7, the glass panel 21 has a plurality of concave portions 2 and convex portions 3 formed on one half of one rectangular surface 21a, as in the first embodiment. The surface 21b also has a convex portion 4 corresponding to the concave portion 2 of the one surface 21a and a concave portion 5 corresponding to the convex portion 3 of the one surface 21a, corresponding to a half position of the one surface 21a. However, the remaining half is formed in a flat plate shape, and the entire portion provided with the flat plate portion 22 and the concave portions 2 and 5 and the convex portions 3 and 4 is formed to have a uniform thickness. Below, the part in which the recessed parts 2 and 5 and the convex parts 3 and 4 were provided is called the decoration part 23 with respect to the flat plate part 22. FIG.
The thickness t of the glass panel 21, the pitch p of the convex portions 3 on one surface 21a, the depth d of the concave portions 2, the pitch between the concave portions 5 on the other surface 21b, and the height of the convex portions 4 are as follows. It is set similarly to the form.

The mold 31 for manufacturing the glass panel 21 has a projection 12 that extends in the vertical direction by a frame body in which half of the mold 31 is formed by combining strip-shaped plate materials in a lattice shape, similarly to the mold 11 of the first embodiment. Is formed in a state in which the heights of the vertices at the top portion 13 are aligned, and the other half is formed in the plate-like portion 32 whose surface is arranged at the same height position as the vertex at the top portion 13 of the protrusion 12. .
As in the first embodiment, when the flat plate glass 10 is placed on the mold 31 and heated to the softening temperature or higher, there is no deformation of the plate glass 10 in the plate portion 32 of the mold 31, but the protrusions. As in the case of the first embodiment, the plate glass 10 is bent in a concave shape between the top portions 13 in the portion supported by the top portions 13 of 12 and cooling in that state, the half of the rectangular shape becomes The glass panel 21 in which the remaining half of the flat plate portion 22 is a decorative portion 23 having a plurality of concave portions 2 and 5 and convex portions 3 and 4 is manufactured.

  The glass panel 21 has the decorative portion 23 and the flat plate portion 22 up and down so that the flat plate portion 22 is disposed in a portion where it is desired to have clear visibility, and the decorative portion 23 is disposed in a portion where it is not desired to be directly visible. Or it can arrange | position to the left and right, and can exhibit a desired decoration effect. Also in this glass panel 21, the decorative portion 23 is limited to contact with the forming die 31 near the apex of the top portion 13 of the protrusion 12 (the deepest portion of the concave portion 5), and most of the decorative portion 23 is formed without contacting the forming die 31. In addition, the flat plate portion 22 is only placed on the plate-like portion 32 of the molding die 31, and is not particularly pressurized. Therefore, not only the front surface but also the back surface is formed smoothly, and the lighting performance is improved. Is also excellent.

FIGS. 9-12 has shown the glass panel 41 of 3rd Embodiment of this invention, and its manufacturing method.
The glass panel 41 is a laminated glass panel as shown in FIGS. 9 and 10, and the two glass panels 42 and 43 are connected to the convex portion 4 on the back surface (the other surface) 42 b of one glass panel 42. The surface (one surface) 43a of the other glass panel 43 is opposed to the concave portion 2 and bonded together via an adhesive layer 44 made of an organic resin film in a state where these are engaged. As will be described later, the concave and convex portions of one glass panel 42 and the concave and convex portions of the other glass panel 43 have different curvature radii, but for convenience, the same reference numerals as those of the first embodiment are attached. To explain.
The adhesive layer 44 is a layer made of polyvinyl acetal resin, acrylic resin, urethane resin, etc., and has a refractive index and light transmittance substantially the same as glass, and has a thickness of 0.3 mm to 3 mm. .2 mm.

When manufacturing this laminated glass panel 41, as shown in FIG.11 and FIG.12, two glass panels 42 and 43 are shape | molded first. Specifically, two flat plate glasses 10 are placed on the mold 11 of the first embodiment shown in FIGS. 2 to 4 with a release agent 45 such as carbon paper or boron nitride interposed therebetween. Then, the two glass sheets 10 are heated and simultaneously molded (deformation process).
When the two glass sheets 10 are formed, the shape of the concave portion 2 on the upper surface (one surface) 43a of the lower glass panel 43 and the shape of the convex portion 4 on the lower surface (other surface) 42b of the upper glass panel 42, and the lower layer The shape of the convex portion 3 on the upper surface 43a of the glass panel 43 and the shape of the concave portion 5 on the lower surface 42b of the upper glass panel 42 are formed in a substantially inverted surface shape, and the concave portion 2 on the upper surface 43a of the lower glass panel 43 and the upper layer are formed. The convex portion 4 of the lower surface 42b of the glass panel 42 is formed with substantially the same radius of curvature, and the convex portion 3 of the upper surface 43a of the lower glass panel 43 and the concave portion 5 of the lower surface 42b of the upper glass panel 42 have substantially the same radius of curvature. It is formed.

However, the curvature radii of the concave portion 2 and the convex portion 3 of the upper surface (one surface) 42a of the upper glass panel 42 are smaller by the thickness t than the curvature radius of the overlapping surface, and the lower glass panel 43 The curvature radii of the convex portions 4 and the concave portions 5 on the lower surface (the other surface) 43b are formed to be larger by the thickness t than the curvature radius of the overlapping surface.
Further, the depth d of the recesses 2 on the upper surface 42 a of the upper glass panel 42 and the pitch p between the protrusions 3, and the depth d of the recesses 2 on the upper surface 43 a of the lower glass panel 43 and the pitch p between the protrusions 3. Are formed identically.
Then, these two glass panels 42 and 43 are made to face each other at the time of molding, and are overlapped with each other through an adhesive layer 44 made of an organic resin film, and heat-pressed according to a conventional method. Thus, the laminated glass panel 41 is manufactured. As described above, since the two sheets are overlapped and molded, the facing surfaces of the laminated glass panel 41 can be fitted together without any gaps, and the accurate laminated glass panel 41 can be formed without causing bubbles or the like inside. Can be obtained.

Since this laminated glass panel 41 is provided with the adhesive layer 44 between the glass panels 42 and 43, the impact resistance is improved, and it is difficult to cause scattering when it is broken. Moreover, although the lighting property and visibility are also slightly reduced by the overlap of the two glass panels 42 and 43 as compared with the glass panel 1 of the first embodiment, almost good characteristics are obtained. Have.
In addition, it is also possible to set it as the form which piled up the 3 or more glass panel through the adhesive bond layer. Further, a plurality of glass panels having different thicknesses may be overlapped.

13 and 14 show a glass panel 51 according to a third embodiment of the present invention.
This glass panel 51 is a multilayer glass panel. In the second embodiment, the two glass panels 42 and 43 are brought into close contact with each other through the adhesive layer 44. However, the multilayer glass panel 51 of the third embodiment is shown in FIGS. 11 and 12 in the second embodiment. Two glass panels 42 and 43 manufactured in the same manner as shown are opposed to each other with a space therebetween, and a spacer 52 and a sealing seal portion 53 are provided on the peripheral edge thereof. The intermediate layer 54 between 43 is an air layer, a vacuum layer, or an inert gas layer such as argon. In this case, the glass panels 42 and 43 are configured so that the convex portion 4 on the back surface (the other surface) 42b of the one glass panel 42 and the concave portion 2 on the surface (the one surface) 43a of the other glass panel 43 face each other. Are arranged. That is, the convex part 4 of one glass panel 42 having substantially the same radius of curvature described above and the concave part 2 of the other glass panel 43 are opposed to each other.

  The spacer 52 has an annular cylinder 55 disposed on the peripheral edge of the glass panels 42 and 43 by an aluminum plate, and the cylinder 55 is bonded between the glass panels 42 and 43. Further, the cylindrical body 55 is filled with a hygroscopic agent 56, and a plurality of holes 57 are formed in a portion facing the intermediate layer 54 of both the glass panels 42 and 43. The sealing seal portion 53 is formed of a resin such as polyisobutylene and seals the peripheral portions of the glass panels 42 and 43 outside the spacer 52.

  Similarly to the laminated glass panel 41 of the second embodiment described above, the multilayer glass panel 51 is also formed by forming two glass panels 42 and 43 at the same time, and then a spacer 52 between the peripheral portions of the two glass panels 41 and 42. It can manufacture by sealing with the sealing seal | sticker part 53 by interposing. When the intermediate layer 54 between the glass panels 42 and 43 is formed into a desired gas layer or vacuum layer, the space between the glass panels 42 and 43 is sealed in the gas atmosphere or vacuum atmosphere, or both the glasses are sealed. After sealing between the panels 42 and 43, a syringe needle or the like is inserted, and a desired gas is injected into the intermediate layer 54 or evacuated.

  The multi-layer glass panel 51 manufactured in this way also has excellent daylighting properties due to the two glass panels 42 and 43, and also has excellent heat insulation properties due to the intermediate layer 54 sealed therebetween. Further, since the spacer 52 is filled with the hygroscopic agent 56, dew condensation or the like can be prevented even when the intermediate layer 54 is an air layer. In addition, about visibility, since both the glass panels 42 and 43 are spaced apart and have the intermediate | middle layer 54, it exists in the tendency to fall a little from the thing of 1st Embodiment and 2nd Embodiment.

  In addition, in this multi-layer glass panel 51, in addition to the case of using a glass panel formed by simultaneously deforming two plate glasses as described above, it is configured by combining glass panels prepared one by one. Also good. In that case, even if the recessed part and the convex part of one glass panel and the recessed part and the convex part of the other glass panel are not the same shape and arrangement | positioning, it is also possible to combine the thing of a different shape and arrangement | positioning.

Although not particularly shown, the glass panel formed in each of the above embodiments may be chemically strengthened. For chemical strengthening, a general treatment method can be applied. For example, a glass panel is immersed in a molten salt containing potassium nitrate (potassium nitrate molten salt) heated to about 380 ° C., and the glass is contained in the molten salt. By substituting Na ions and K ions contained therein, a compressive stress layer is generated on the glass surface to improve the strength of the glass. In the case of the laminated glass panel of the second embodiment and the multilayer glass panel of the third embodiment, each glass panel is subjected to chemical strengthening treatment and assembled into a laminated glass panel or a multilayer glass panel.
The glass panel of the present invention is expected to be used as a wall material for buildings, and can have high wind pressure resistance as a wall material by chemically strengthening.

In addition, this invention is not limited to the said embodiment, A various change can be added in the range which does not deviate from the meaning of this invention.
For example, in the said embodiment, although the projection part which supports flat plate glass was formed with the strip | belt-shaped board | plate material, you may form in columnar shape. By arranging the columnar protrusions vertically and horizontally, the glass panel has four cones with rounded tips on one side of the glass panel. The surface shape is slightly recessed between the convex portions. On the other side, on the other hand, approximately conical concave portions with rounded tips are formed at four locations around one convex portion.

Moreover, in the said embodiment, although the projection part was formed in the rectangular grid | lattice form, you may form so that each sides, such as a triangle other than a rectangle, and a pentagon, may be comprised. A molding die 61 shown in FIG. 15 is configured such that the protrusions 12 are combined in a hexagonal shape in a front view so that the support portion 13 has a hexagonal shape, and the molding die 65 shown in FIG. In the remaining half for forming the decorative part formed on the plate-like part 66, the support part 13 by the projection part 12 is arranged in a hexagonal shape in front view. In any case, the space portion 14 is formed in a hexagonal shape.
The same applies to the case where the protrusions are formed in a columnar shape, and various arrangements such as arranging them on the apexes of triangles, hexagons, etc., or arranging them in a staggered manner other than arranging them vertically and horizontally.

An experiment was conducted to confirm the effect of the present invention.
Example 1
As a glass panel, a 10 mm thick float plate glass (visible light transmittance: 88.3%) having a soda-lime glass composition, which has a rectangular shape of 900 mm × 1500 mm as a whole, is obtained by the same method as in the first embodiment. A plurality of samples having different thicknesses, pitches between convex portions on one surface, and depths of the concave portions as shown in Table 1 were prepared.
About these samples, the lighting degree and visibility were measured as follows.
The light intensity was measured by measuring the visible light transmittance according to JIS R3106 by cutting out the apex portion of the convex portion with a size of 30 mm × 30 mm.
For visibility, a test piece was cut out with a 200 mm square so that the vertex of the convex portion was the center, and a camera was installed so as to match the vertex of the convex portion. A 2000 mm square zebra plate was placed on the opposite side of the camera across the test piece. The distance between the camera and the test piece and between the test piece and the zebra plate was 4.5 m. The camera can observe the distorted zebra plate through the test piece, and the degree of distortion is determined by how much the strain of the black line on the zebra plate that can be observed is distorted through the apex of the convex part. It was measured.
The results are shown in Table 1.

(Example 2)
As a glass panel, a soda lime glass composition of 5 mm thick float plate glass (visible light transmittance of 87.6%) is formed into a rectangular shape of 900 mm × 1500 mm as a whole. A plurality of samples were produced in which the thickness, the pitch between the convex portions on one surface, and the depth of the concave portions were changed as shown in Table 1. A laminated glass was prepared by interposing a 1.5 mm thick polyvinyl butyral film between two glass panels having the same pitch between protrusions and the depth of the recesses, and the same evaluation as in Example 1 was performed.
The results are shown in Table 2.

  From these test results, it can be seen that the glass panel of the example has a visible light transmittance comparable to that of a flat float glass, and can be visually recognized with a unique pattern that is swaying with respect to visibility. .

DESCRIPTION OF SYMBOLS 1 Glass panel 1a One surface 1b The other surface 2 Concave part 3 Convex part 4 Convex part 5 Concave part 10 Glass plate 11 Mold 12 Protrusion part 13 Support part (top part)
14 Space part 15 Glass mounting surface 21 Glass panel 21a One side 21b The other side 22 Flat plate part 23 Decoration part 31 Mold 32 Plate-like part 41 Laminated glass panel 42, 43 Glass panel 42a, 43a One side 42b, 43b Other surface 44 Release agent 45 Adhesive layer 51 Multi-layer glass panel 52 Spacer 53 Sealing seal portion 54 Intermediate layer 55 Cylindrical body 56 Hygroscopic agent 57 Hole 61, 65 Glass panel 66 Plate-like portion

Claims (7)

  It has a uniform plate thickness, and has a plurality of concave portions and convex portions on one surface, and a convex portion corresponding to the concave portion on the one surface and the convex portion on the one surface on the other surface. The glass panel has a concave portion corresponding to the portion, and the front surface and the back surface are smooth surfaces except for the deepest portion of the concave portion on either surface.   The pitch between the convex portions on the one surface is 30 mm or more and 800 mm or less, and the depth of the concave portion on the one surface is 1/150 or more and 1/5 or less of the pitch. 1. The glass panel according to 1.   The glass panel according to claim 1, wherein a compressive stress layer is formed on the front surface and the back surface.   A plurality of glass panels according to any one of claims 1 to 3, wherein the plurality of glass panels are bonded to the concave portion of one glass panel in a state where the convex portions of the other glass panel are engaged. Laminated glass panel.   A multilayer glass panel comprising a plurality of the glass panels according to any one of claims 1 to 3 facing each other with a space therebetween, and the peripheral edges of the glass panels are hermetically sealed.   Preparing a mold having a plurality of dot-like or line-like tops standing upright apart from each other and preparing a flat plate glass on the projections of the mold And a deformation step of cooling the plate glass on the projection by heating the plate glass to a softening temperature or higher to bend the portion spanned between the tops of the projection. A method for manufacturing a glass panel. The method for producing a glass panel according to claim 6, wherein in the preparation step, the plate glass is further placed on the protrusion in a state where the plate glass is further superimposed on the plate glass via a release agent.

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