JP6515544B2 - Method of manufacturing opening structure with light collecting function, method of manufacturing light collecting member, and method of determining direction of light collecting member - Google Patents

Description

  The present invention relates to a method of manufacturing an opening structure with a light collecting function, a method of manufacturing a light collecting member, and a method of determining the direction of the light collecting member for collecting outside light such as sunlight into a room with desired light collecting performance.

  Background Art A light collecting member for deflecting external light such as sunlight and collecting the light indoors is conventionally known. As such a daylighting member, a daylighting sheet formed in a sheet shape, laminated glass formed by arranging a daylighting sheet between two sheets of glass, a daylighting blind having a daylighting function of a slat portion, a roll screen shape There is a daylight roll screen or the like formed in the above. For example, a daylighting sheet is used by being stuck to a window glass of a building or the like, and laminated glass, daylighting blinds, a daylighting roll screen are used by being installed in an opening of a construction or the like. Such a light collecting member may brighten the entire room, for example, by deflecting the incident outside light to the ceiling side of the room and emitting the light as compared with the case where the outside light is simply transmitted into the room. it can.

  Patent Document 1 discloses a daylighting sheet of this type. The daylighting sheet includes a light transmitting sheet-like base layer and a light deflection layer for deflecting light. The light deflection layer is disposed between a plurality of light transmitting portions arranged in a plurality along the one surface of the base layer, and a plurality of light transmitting portions, and is filled with a material having a lower refractive index than the light transmitting portion. And a light deflection unit.

  The daylighting sheet according to Patent Document 1 can be used in a state of being stuck to a window glass or the like of a structure along the vertical direction. In such a state of use, the side on the upper side of the light deflection portion is formed in a cross-section in the thickness direction to exhibit a downward convex line shape or the like. Such a shape enables external light to be deflected to the ceiling side of the room and emitted.

  Further, Patent Document 2 discloses a daylighting sheet having a light deflecting portion formed of a prism formed asymmetrically with respect to the normal direction of the sheet surface. In this daylighting sheet, since the sunlight is incident on the upper surface side of the prism, the shape of the upper surface is optimized such that most of the light incident on the upper surface is reflected obliquely upward in the room.

  In the daylighting sheet disclosed in Patent Document 1 and Patent Document 2, the light deflection portion is formed asymmetrically with respect to the normal direction of the sheet surface. On the other hand, a daylighting sheet having a light deflection portion formed symmetrically with respect to the normal direction of the sheet surface is also conventionally known.

JP, 2014-119738, A Japanese Patent Application Publication No. 2013-514549

  The light collecting member in which the light deflecting portion is formed asymmetrically with respect to the normal direction of the sheet surface can not obtain desired light collecting performance if the upper and lower or front and back are mistakenly used. On the other hand, in a daylighting member in which the light deflection portions are formed symmetrically with respect to the normal direction of the sheet surface, if the front and back surfaces are properly disposed, it may be possible to use appropriately even if the upper and lower directions are mistaken. . However, if the front and back surfaces are misused, it becomes impossible to obtain the desired light collecting performance.

  Therefore, when using such a daylighting member, it is necessary to grasp the direction correctly. However, the light deflector is usually of a small size and transparent. Therefore, depending on the visual confirmation of the appearance, the upper and lower sides and the front and back can not be easily distinguished. As a result, using the wrong direction may result in a situation where the desired daylighting performance can not be obtained. And the problem that the correction takes time will arise. For example, when the daylighting sheet is improperly disposed between the glass and configured, the laminated glass having the daylighting sheet requires much time and labor to correct the lightening sheet, resulting in a decrease in yield in the manufacturing process.

  As a measure for recognizing the direction of such a light collecting member, it is conceivable to provide an indicator indicating the direction to the light collecting member in the manufacturing stage. However, such an index may be disposed at a visible position even after the installation of the light collecting member. Therefore, this measure is not necessarily preferable considering the appearance.

  The present invention has been made in view of the above-described circumstances, and the desired light collecting performance can be obtained by the direction of the light collecting member being easily determined and the light collecting member being installed or being installable in the correct direction. It is an object of the present invention to provide a method of manufacturing an opening structure with a light collecting function, a method of manufacturing a light collecting member, and a method of determining the direction of the light collecting member.

  In order to solve the above problems, the present invention provides a light deflecting element that totally reflects light incident on a surface from a direction inclined at an angle within a design angle range upward in a state where upper and lower and front and back are arranged in a specified direction. Providing a light collecting member for emitting light totally reflected by the light deflection element from the back surface, a direction determining step of determining at least one of upper and lower and front and back of the light collecting member, and the direction determination Installing the light collecting member in the opening formed in the structure based on the determination result of the process to form an opening structure with a light collecting function; Test light is made to enter the light collecting member from a direction inclined at a predetermined angle, and based on the emitted light emitted from the light collecting member, at least one of the upper and lower and the front and back of the light collecting member Determine, to provide a method for manufacturing a lighting function open structure.

  The predetermined angle is determined by the light deflection element when light is incident on the back surface from a direction inclined upward in a state in which the front and back surfaces of the light collecting member are disposed opposite to the prescribed direction. It is preferable that the angle be set so as not to cause total reflection.

  Further, when the light is incident on the surface from a direction inclined upward in a state where the upper and lower sides of the light collecting member are disposed opposite to the specified direction, the predetermined angle is the light deflection of the light It is preferable that the angle be set so as not to be totally reflected by the element.

  In addition, the light collecting member includes a base formed in a sheet shape, and the plurality of light deflection elements arranged in the sheet surface direction of the base, and the light deflection element has a refractive index lower than that of the base The upper side surface of the light deflection element is formed in the shape of a broken line or curve convex downward in the longitudinal cross section along the thickness direction of the light collecting member, and the upper side surface is the base The angle formed with respect to the normal direction of may be larger on the front side than on the rear side.

  Here, in the case where the upper side surface of the light deflection element is formed in a broken line shape in a longitudinal cross section along the thickness direction of the light collecting member, the predetermined angle is the upper and lower and front and back sides of the light collecting member When light is made incident on the surface from a direction inclined upward in the state of being disposed in the above, the angle that the traveling direction of this light makes with the normal direction is the surface side of the upper side surface It is preferable that the flat portion closest to is set so as to be larger than the angle formed by the normal direction.

  Further, when the light is made to enter the surface from the direction inclined upward in a state where the upper and lower and the front and back of the light collecting member are arranged in the specified direction, the predetermined angle is the light of the upper side surface It is preferable to set so that it may inject only into the plane part nearest to the said surface side among them.

  The present invention also includes a light deflection element for totally reflecting light incident on the surface from a direction inclined at an angle within a design angle range in a state where the top and bottom and the front and back are arranged in a specified direction, the light deflection A preparation step of preparing a light collecting member for emitting light totally reflected by an element from the back surface, a direction determining step of determining at least one of the upper and lower and front and back of the light collecting member, and a determination result of the direction determining step And the processing step of processing the light collecting member, and in the direction determining step, the test light is made to enter the light collecting member from a direction inclined at a predetermined angle within the design angle range, and the light collecting member The manufacturing method of the daylighting member which discriminate | determines at least one of the upper and lower sides and front and back of the said daylighting member based on the emitted light emitted is provided.

  The predetermined angle is determined by the light deflection element when light is incident on the back surface from a direction inclined upward in a state in which the front and back surfaces of the light collecting member are disposed opposite to the prescribed direction. It is preferable that the angle be set so as not to cause total reflection.

  Further, when the light is incident on the surface from a direction inclined upward in a state where the upper and lower sides of the light collecting member are disposed opposite to the specified direction, the predetermined angle is the light deflection of the light It is preferable that the angle be set so as not to be totally reflected by the element.

  In addition, the light collecting member includes a base formed in a sheet shape, and the plurality of light deflection elements arranged in the sheet surface direction of the base, and the light deflection element has a refractive index lower than that of the base The upper side surface of the light deflection element is formed in the shape of a broken line or curve convex downward in the longitudinal cross section along the thickness direction of the light collecting member, and the upper side surface is the base The angle formed with respect to the normal direction of may be larger on the front side than on the rear side.

  Here, in the case where the upper side surface of the light deflection element is formed in a broken line shape in a longitudinal cross section along the thickness direction of the light collecting member, the predetermined angle is the upper and lower and front and back sides of the light collecting member When light is made incident on the surface from a direction inclined upward in the state of being disposed in the above, the angle that the traveling direction of this light makes with the normal direction is the surface side of the upper side surface It is preferable that the flat portion closest to is set so as to be larger than the angle formed by the normal direction.

  Further, when the light is made to enter the surface from the direction inclined upward in a state where the upper and lower and the front and back of the light collecting member are arranged in the specified direction, the predetermined angle is the light of the upper side surface It is preferable to set so that it may inject only into the plane part nearest to the said surface side among them.

  In the processing step, an index indicating a direction may be provided to the light collecting member based on the determination result of the direction determination step.

  In the case where an indicator indicating a direction is provided in advance in the light collecting member, in the processing step, based on the determination result of the direction determination step, correctness of the indicator is confirmed, and the direction indicated by the indicator and the actual If the direction of the light collecting member is different, the index may be corrected.

  The present invention also includes a light deflection element for totally reflecting light incident on the surface from a direction inclined at an angle within a design angle range in a state where the top and bottom and the front and back are arranged in a specified direction, the light deflection The method further includes a preparation step of preparing a light collecting member for emitting light totally reflected by the element from the back surface, and a direction determining step of determining at least one of the upper and lower and front and back of the light collecting member. Test light is made to enter the light collecting member from a direction inclined at a predetermined angle within the design angle range, and at least one of the upper and lower and the front and back of the light collecting member is based on the emitted light emitted from the light collecting member Provided is a method of determining the direction of a light collecting member, which determines.

  The predetermined angle is determined by the light deflection element when light is incident on the back surface from a direction inclined upward in a state in which the front and back surfaces of the light collecting member are disposed opposite to the prescribed direction. It is preferable that the angle be set so as not to cause total reflection.

  Further, when the light is incident on the surface from the direction inclined upward in the state where the upper and lower sides of the light collecting member are installed opposite to the specified direction, the predetermined angle is the light deflection of the light It is preferable that the angle be set so as not to be totally reflected by the element.

  In addition, the light collecting member includes a base formed in a sheet shape, and the plurality of light deflection elements arranged in the sheet surface direction of the base, and the light deflection element has a refractive index lower than that of the base The upper side surface of the light deflection element is formed in the shape of a broken line or curve convex downward in the longitudinal cross section along the thickness direction of the light collecting member, and the upper side surface is the base The angle formed with respect to the normal direction of may be larger on the front side than on the rear side.

  Here, in the case where the upper side surface of the light deflection element is formed in a broken line shape in a longitudinal cross section along the thickness direction of the light collecting member, the predetermined angle is the upper and lower and front and back sides of the light collecting member When light is made incident on the surface from a direction inclined upward in the state of being disposed in the above, the angle that the traveling direction of this light makes with the normal direction is the surface side of the upper side surface It is preferable that the flat portion closest to is set so as to be larger than the angle formed by the normal direction.

  Further, when the light is made to enter the surface from the direction inclined upward in a state where the upper and lower and the front and back of the light collecting member are arranged in the specified direction, the predetermined angle is the light of the upper side surface It is preferable to set so that it may inject only into the plane part nearest to the said surface side among them.

  According to the present invention, the direction of the daylighting member can be easily determined, and the daylighting member can be installed in the correct direction or can be installed, whereby a desired daylighting performance can be obtained.

It is the schematic of the opening structure with a daylighting function manufactured by the manufacturing method by the 1st Embodiment of this invention. It is a front view of the laminated glass as a light collection member which comprises the said opening structure. It is a longitudinal cross-sectional view of the said opening structure. It is a principal part enlarged view of FIG. It is an enlarged view of the daylighting sheet contained in the said laminated glass. It is a figure explaining the direction discrimination | determination process of the manufacturing method by 1st Embodiment. It is a figure explaining the detail of the said direction discrimination | determination process. It is a figure explaining the manufacturing method of the daylighting member by the 2nd Embodiment of this invention. It is a figure explaining the example which performs a direction discrimination | determination process with respect to the daylighting member of a structure different from the daylighting member by which discrimination | determination was performed by the direction discrimination | determination process in 1st Embodiment and 2nd Embodiment. An example in which the direction determining step is performed on a light collecting member having a configuration different from the light collecting member determined in the direction determining step in the first embodiment and the second embodiment and the light collecting member illustrated in FIG. It is a figure explaining. The direction determining process is performed on the light collecting member having a configuration different from the light collecting member determined in the direction determining step in the first embodiment and the second embodiment and the light collecting member illustrated in FIGS. It is a figure explaining an example. It is a figure explaining the intensity | strength of the light radiate | emitted from the daylighting member in the direction discrimination | determination process concerning an Example.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings attached to the present specification, for the sake of easy illustration and understanding, the scale, vertical and horizontal dimensional ratios, etc. are exaggerated and changed from those of a real thing as appropriate.

  Also, in the present specification, the terms "sheet", "film" and "plate" are not distinguished from one another based only on the difference in designation. For example, "sheet" is a concept including a member that can be called a film or a plate.

  Furthermore, the terms “parallel”, “orthogonal”, “identical” and the like which specify the shape and geometrical conditions as well as their degree, which are used in the present specification, are not limited to the exact meanings. It shall be interpreted including the range which can expect the same function.

  Furthermore, “sheet surface (film surface, plate surface)” refers to a sheet-like member (film-like member) which is a target when the target sheet-like (film-like, plate-like) member is viewed from the whole and on a large scale. , The plane direction of the plate-like member).

First Embodiment
In the first embodiment, a method of manufacturing an aperture structure with a daylighting function will be described. FIG. 1 is a schematic view of a light emitting function-equipped opening structure 1 (hereinafter abbreviated as the opening structure 1) manufactured in the present embodiment. FIG. 2 is a front view of the laminated glass 10 as a light collecting member constituting the opening structure 1, and FIG. 3 is a longitudinal sectional view of the opening structure 1. Below, schematic structure of the opening structure 1 and the laminated glass 10 is demonstrated first.

(Opening structure with daylighting function and laminated glass)
In FIG. 1, reference symbol W indicates a wall in a structure as a structure, and in the wall W, an opening 2 is formed. The opening structure 1 manufactured according to the present embodiment is configured by installing a laminated glass 10 as a light collecting member in the opening 2. The opening structure 1 allows sunlight from the outdoor side, which is the side indicated by the arrow OUT in the figure, to be incident on the laminated glass 10, and this incident light to the indoor side which is the side indicated by the arrow IN with desired lighting performance. Daylighting.

  The laminated glass 10 includes the light collecting sheet 20 formed in a rectangular shape, the rectangular outer panel 12 and the inner panel 13 sandwiching the light collecting sheet 20, and the outer peripheral edges of the panels 12 and 13 sandwiching the light collecting sheet 20. And a rectangular frame-like frame member 14 surrounding the frame.

  Among these, the daylighting sheet 20 is a member having a daylighting performance. The panels 12 and 13 are plate-like translucent panels having translucency, such as glass panels and resin panels, which are used for windows of ordinary buildings and vehicles. The frame member 14 is a member for holding the laminated glass 10 at the opening 2.

  The symbol V in FIGS. 1 and 3 indicates the vertical direction. In this example, the laminated glass 10 is installed in the opening 2 and used such that the plate surfaces of the panels 12 and 13 are along the vertical direction. Specifically, the laminated glass 10 has an upper portion 10U and a lower portion 10D, with the upper portion 10U facing upward, the lower portion 10D facing downward, the outer panel 12 facing the outdoor side, and the inner panel 13 facing the indoor side. And, the plate surfaces of the panels 12 and 13 are installed and used along the vertical direction.

  In the use state as described above, the laminated glass 10 deflects the light incident on the outer panel 12 so as to obtain a desired light collecting performance by the light collecting sheet 20 as shown by a plurality of arrows in FIG. 3. The light is emitted from the inner panel 13. In the drawing, reference numeral 10A denotes a surface facing the outside of the outer panel 12 where light is incident, and reference numeral 10B denotes a back surface facing the indoor side where light of the inner panel 13 is emitted. There is. Moreover, the code | symbol H in the figure has shown the normal line direction of the laminated glass 10 thru | or the daylighting sheet 20 which are orthogonal to surface 10A and back surface 10B. The normal H extends parallel to the horizontal direction.

As shown in FIG. 4, the light collecting sheet 20 is adhered to the outer panel 12 via the first adhesive layer 31 and is adhered to the inner panel 13 via the second adhesive layer 32. The adhesive layers 31 and 32 are thermoplastic resins or the like, and have translucency. The daylighting sheet 20 also has a base 21 formed in a sheet shape and a plurality of light deflection elements 22 arranged in the sheet surface direction of the base 21. The base 21 is formed with a plurality of grooves 21A formed to be separated along the sheet surface direction. A light deflection element 22 is disposed inside each of the grooves 21A. In addition, the light deflection element 22 is made of a material having a refractive index N _B lower than the refractive index N _A of the base 21. In FIG. 4, the base 21 is not hatched for the convenience of description.

  In FIG. 5, the light deflection element 22 is shown enlarged. As shown in FIG. 5, the upper side surface 22U of the light deflection element 22 is formed in a convex broken line shape in the vertical cross section along the thickness direction of the daylighting sheet 20. Specifically, the upper side surface 22U has two plane portions of a first surface portion 23A located on the front surface 10A side and a second surface portion 23B located on the back surface 10B side. The angle that the first surface portion 23A makes with the normal direction H is larger than the angle that the second surface portion 23B makes with the normal direction H. On the other hand, the lower side surface 22D of the light deflection element 22 is formed to extend linearly in a cross sectional view.

  In FIG. 5, the symbol α indicates the angle that the first surface portion 23A of the upper side surface 22U makes with the normal direction H, and the symbol β indicates the second surface portion 23B of the upper side surface 22U in the normal direction H It shows the angle that it makes with. Here, the relationship of α> β holds. Further, a symbol γ indicates an angle which the lower side surface 22D forms with the normal direction H. Furthermore, the symbol a indicates the length dimension in the normal direction H (thickness direction) of the first surface portion 23A, and the symbol b indicates the length dimension in the normal direction H (thickness direction) of the second surface portion 23B. It shows. In addition, the symbol h indicates the distance in the sheet surface direction between the end on the surface 10A side of the first surface portion 23A and the end on the surface 10A side of the lower side surface 22D of another light deflection element 22 adjacent above. ing.

  In such a daylighting sheet 20, when the upper and lower sides and the front and back of the laminated glass 10 are arranged in the “specified direction” shown in the drawing, the above-mentioned light deflection element 22 has a design angle range upward as shown in FIG. The angle α of the first surface portion 23A, the angle β of the second surface portion 23B, and the like are designed so as to totally reflect the light incident on the surface 10A from the direction inclined at an angle within Ra. The light deflection element 22 emits the totally reflected light so as to jump upward from the back surface 10B. Thereby, in the laminated glass 10, desired light collection performance is obtained. The upper and lower sides and the front and back of the laminated glass 10 are arranged in the “prescribed direction”, in this example, in the laminated glass 10, the upper part 10U is directed upward, the lower part 10D is directed downward, and light is incident. This means that the panel 12 faces the outdoor side, the inner panel 13 faces the indoor side, and the plate surfaces of the panels 12 and 13 are in the vertical direction.

For example, θ1 and θ2 shown in FIG. 5 indicate an angle within the design angle range Ra. Among them, light incident from the direction of the angle θ1 is refracted inside the base 21 and is incident on the first surface portion 23A at an angle inclined by θ _{A with} respect to the first surface portion 23A of the light deflection element 22, It is totally reflected and emitted upward. The light incident from the direction of the angle θ2 is refracted inside the base 21 and is incident on the second surface portion 23B at an angle inclined by θ _{B with} respect to the second surface portion 23B of the light deflection element 22, It is reflected and emitted upward. As described above, the light deflection element 22 is designed to have the angle α, the angle β, and the like so that light incident at an angle within the design angle range Ra is totally reflected by the first surface portion 23A or the second surface portion 23B. .

In addition, in FIG. 5, the inner side panel 12 and the 1st contact bonding layer 31 are abbreviate | omitted. In this example, for the convenience of description, it is assumed that the refractive indexes of the inner panel 12, the first adhesive layer 31, and the base 21 are equal. Therefore, as shown in FIG. 5, when the outdoor refractive index is N ₀ , light incident on the surface 10A at an angle θ 1 travels in the base 21 while satisfying the relationship N ₀ sin θ1 = N _A sin θx . Therefore, the angle θ _A at which the traveling direction of the light in the light collecting sheet 20 (in the base 21) is inclined with respect to the first surface portion 23A is calculated by θ _A = θ x −α. On the other hand, light incident on the surface 10A at an angle θ2 travels in the base 21 while satisfying the relationship of N ₀ sin θ2 = N _A sin θy. Therefore, the angle θ _B at which the traveling direction of the light in the light collecting sheet 20 (in the base 21) is inclined with respect to the second surface portion 23B is calculated by θ _B = θ y −β.

  On the other hand, with this daylighting sheet 20, when the upper and lower sides and the front and back of the laminated glass 10 are not arranged in the "specified direction", for example, the upper and lower directions are opposite to the "defined direction", the design angle is upward Even when light is incident from a direction inclined at an angle within the range Ra, desired light collecting performance can not be obtained, in other words, light collecting performance different from the desired light collecting performance can be obtained. Therefore, in the state where the upper and lower sides and the front and back of the laminated glass 10 are arranged in the “prescribed direction” and the state where it is not so, even if light is incident under the same conditions, a difference occurs in the light collecting performance. It has become.

  Specifically, in a state where the top and bottom and the front and back are disposed in the “prescribed direction”, when light is incident from above in a direction inclined at an angle within the design angle range Ra, the light is deflected by the light deflection element 22 Thus, an emission aspect is obtained that is totally reflected and emitted upward from the back surface 10B. On the other hand, in the state where the upper and lower sides and the front and back are not arranged in the “specified direction”, different emission modes can be obtained even when light is incident under the same conditions. Therefore, the desired light collecting performance can not be obtained.

  As described above, in the case where the laminated glass 10 described above is in a state in which the upper and lower and front and back sides are not arranged in the “specified direction”, desired light collecting performance can not be obtained. Therefore, if the laminated glass 10 is installed in the opening 2 in an inappropriate direction, the opening structure 1 can not exhibit desired light collecting performance. In order to prevent such a situation, the method of manufacturing the opening structure 1 of the present embodiment described below includes the step of determining the direction of the laminated glass 10 before installing the laminated glass 10 in the opening 2 of the wall W. Prepare. Thereafter, the laminated glass 10 is properly installed in the opening 2.

(Manufacturing method of aperture structure with daylighting function)
Hereinafter, the manufacturing method according to the present embodiment will be described in detail. As a general outline, the manufacturing method of the opening structure 1 with a light collecting function according to the present embodiment includes a preparation step of preparing the laminated glass 10 described above, a direction discrimination step of discriminating upper and lower and front and back of the laminated glass 10, and a direction discrimination step. And installing the laminated glass 10 at the opening 2 of the wall W based on the determination result to configure the opening structure 1.

  Among these, in the direction determining step, the test light Lt is made to enter the laminated glass 10 from the direction inclined at the predetermined angle θt within the design angle range Ra, and based on the emitted light emitted from the laminated glass 10, The upper and lower sides and the front and back of the laminated glass 10 are determined.

  FIG. 6 is a diagram for explaining the direction determining process according to the present embodiment. As shown in the figure, in the present embodiment, the laminated glass 10 is held along the vertical direction, and the test light Lt is made incident on the laminated glass 10 from a direction inclined upward at a predetermined angle θt. The emitted light is irradiated to the wall surface Ws. In addition, when holding the laminated glass 10 in a state along the vertical direction, ideally, the laminated glass 10 is strictly held so as to be exactly parallel to the vertical direction, but even if it is slightly inclined to the vertical direction I do not care. Further, in this example, the point light source device 100 is used as a device for emitting the test light Lt. It is preferable that the test light Lt be light with high straightness. Moreover, it is preferable that the point light source device 100 is a small light source that can be easily handled by a worker by hand. Therefore, as the point light source device 100, for example, a laser pointer or the like is preferable.

  As described above, in a state where the upper and lower sides and the front and back of the laminated glass 10 are arranged in the “prescribed direction”, this light is incident when light is incident upward from a direction inclined at an angle within the design angle range Ra. An output aspect is obtained that is totally reflected by the light deflection element 22 and is emitted so as to jump upward from the back surface 10B. On the other hand, when the upper and lower sides and the front and back of the laminated glass 10 are not arranged in the “specified direction”, different emission modes can be obtained even when light is incident under the same conditions as described above.

  Therefore, as described above, when the test light Lt is made to enter the laminated glass 10 from a direction inclined at a predetermined angle θt while holding the laminated glass 10 in the state along the vertical direction, A difference occurs in the irradiation pattern on the wall surface Ws due to the difference in the emission mode of the emitted light depending on the direction. In the direction determining step according to the present embodiment, the direction of the laminated glass 10 is determined based on such a difference in irradiation pattern.

  Specifically, when the laminated glass 10 is held along the vertical direction, the surface 10A faces the incident side of the test light Lt and the upper and lower sides of the laminated glass 10 are disposed in the “specified direction”. Since the incident light is totally reflected, the outgoing light is emitted by the light deflection element 22 so as to jump upward, and the irradiation pattern in which the outgoing light is irradiated above the wall surface Ws is confirmed. obtain. On the other hand, in a state where the surface 10A of the laminated glass 10 is opposite to the side on which the test light Lt is incident, or in a state where the upper part 10U is facing downward, the irradiation that can be confirmed in the "defined direction" A radiation pattern different from the pattern may be identified. Specifically, in the present embodiment, the direction of the laminated glass 10 can be determined from such a difference in irradiation pattern.

  That is, when the irradiation pattern in which the emitted light is irradiated to the upper side of the wall surface Ws is confirmed, the directions of the surface 10A and the upper part 10U of the laminated glass 10 can be specified, and other irradiation patterns are confirmed. Since the direction of the surface 10A and the upper portion 10U can not be specified clearly, the operation of the direction determining step is repeated until the irradiation pattern in which the emitted light is irradiated on the upper side of the wall surface Ws is confirmed. And the direction of the upper 10U can be identified.

  As described above, according to the direction determining step according to the present embodiment, the test light Lt is made to enter the laminated glass 10 from the direction inclined at the predetermined angle θt within the design angle range Ra, and emitted from the laminated glass 10 By confirming the emitted light, it can be easily determined in the direction of the laminated glass 10.

  Here, although the angle within the design angle range Ra may be selected as the above-mentioned predetermined angle θt, a clear difference does not occur in different irradiation patterns depending on the direction of the laminated glass 10 depending on the selected angle. There is a case. As a result, a situation may occur in which the direction of the laminated glass 10 can not be easily and accurately determined. Therefore, in the present embodiment, in order to determine the direction of the laminated glass 10 easily and accurately, the predetermined angle θt is set so as to satisfy the conditions 1 to 5 described below.

(Condition 1)
First, as the condition 1, when the test light Lt is made to enter the surface 10A from a direction inclined upward in a state where the upper and lower sides and the front and back of the laminated glass 10 are arranged in the “specified direction” as the predetermined angle θt The light is set to an angle at which the light is totally reflected by the first surface portion 23A of the light deflection element 22.

  In the present embodiment, if the angle is within the design angle range Ra, the incident test light Lt can be totally reflected by the first surface portion 23A or the second surface portion 23B. However, when the test light Lt is totally reflected on both the first surface portion 23A and the second surface portion 23B, the emitted light is irradiated to the wall surface Ws in a wide range, and the irradiation pattern tends to be difficult to be a characteristic state. On the other hand, when the test light Lt is mainly totally reflected by the first surface portion 23, the emitted light may be spot-wise irradiated to the wall surface Ws, and the irradiation pattern may be characteristic. When the irradiation pattern is characteristic, the direction of the laminated glass 10 (the surface 10A and the upper portion 10U) can be easily and accurately determined. Therefore, the condition 1 is set as a premise for the test light Lt to be mainly totally reflected by the first surface portion 23A and to make the irradiation pattern of the emitted light characteristic.

  The condition 1 is that when the test light Lt is made to enter the surface 10A from the direction inclined upward with the upper and lower sides and the front and back of the laminated glass 10 arranged in the “specified direction”, the traveling direction of this light is The condition that the predetermined angle θt is set such that the angle formed with respect to the linear direction H is larger than the angle formed by the first surface portion 23A of the upper side surface 22U with the normal direction H . In addition to this, when the test light Lt is made incident on the surface 10A, the angle which the traveling direction of this light makes with the normal direction H is smaller than the critical angle of the total reflection in the first surface portion 23A. , And the predetermined angle θt is set.

  Strictly speaking, referring to the angle and the refractive index shown in FIG. 5, light incident at an angle inclined by an angle θx with respect to the normal direction H in the base 21 of the daylighting sheet 20 has the following formula ( Total reflection in the range of 1).

α <θx <α + 90 ° -arcsin (N _B / N _A ) (1)

  Based on the above equation (1), the predetermined angle θt satisfying the condition 1 is expressed by the following equation (2).

arcsin ((N _B / N ₀ ) sin α) <θt <arc sin ((N _A / N ₀ ) sin (α + 90 ° -arcsin (N _B / N _A )) (2)

(Condition 2)
Next, as condition 2, when the test light Lt is made to be incident on the surface 10A from a direction inclined upward in a state where the upper and lower sides and the front and back of the laminated glass 10 are arranged in the “specified direction” as the predetermined angle θt. The angle is set such that this light is not totally reflected by the second surface portion 23B of the light deflection element 22.

  As described above, when the test light Lt is totally reflected by both the first surface portion 23A and the second surface portion 23B, the emitted light is widely irradiated to the wall surface Ws, and the irradiation pattern tends not to be characteristic. There is. On the other hand, when the test light Lt is mainly totally reflected by the first surface portion 23, the emitted light may be spot-wise irradiated to the wall surface Ws, and the irradiation pattern may be characteristic. Here, when the test light Lt is not totally reflected by the second surface portion 23B but totally reflected only by the first surface portion 23, the emitted light can be clearly spot-wise emitted to the wall surface Ws, and the irradiation pattern is Can be clearly distinctive. Accordingly, the condition 2 is set in order to make the test pattern Lt be totally reflected only by the first surface portion 23 and to make the irradiation pattern of the emitted light distinctive. Thereby, when the test light Lt is made to be incident on the surface 10A from the direction inclined upward in a state where the upper and lower sides and the front and back of the laminated glass 10 are arranged in the "specified direction", From the irradiation pattern, it can be easily determined that the state of the laminated glass 10 on which the test light Lt is incident is the state of the “prescribed direction”. From this, it is possible to easily determine the direction of the laminated glass 10.

  With reference to the angle and refractive index shown in FIG. 5, light incident at an angle inclined by an angle θy with respect to the normal direction H in the base 21 of the daylighting sheet 20 is in the range of the following formula (3) , Not totally reflected.

θy-β> 90 ° -arcsin (N _B / N _A ) (3)

  Based on the above equation (3), the predetermined angle θt satisfying the condition 2 is expressed by the following equation (4).

arcsin ((N _B / N ₀ ) sin (β + 90 ° -arcsin (N _B / N _A )) <θt (4)

(Condition 3)
Next, as condition 3, with the predetermined angle θt, the front and the back of the laminated glass 10 are disposed opposite to the “prescribed direction”, and the upper and lower sides are correctly disposed, from the direction inclined upward to the back surface When light is incident on 10 B, the angle is set such that the light is not totally reflected by the second surface portion 23 B of the light deflection element 22. That is, referring to FIG. 5, when light is made incident from the direction of arrow X, predetermined angle θt is set to an angle at which the light is not totally reflected by second surface portion 23B of light deflection element 22. .

  When light is incident on the back surface 10B from a direction inclined upward in a state in which the front and back of the laminated glass 10 are disposed opposite to the “specified direction” and the vertical direction is correctly disposed, this light is When total reflection is performed by the second surface portion 23B of the light deflection element 22, the irradiation pattern is emitted light when the test light Lt is incident in a state where the top and bottom and the front and back of the laminated glass 10 are disposed in the “specified direction”. With respect to the irradiation pattern of, it can be difficult to make a clear difference. Therefore, condition 3 is to clarify the difference between the irradiation pattern of the emitted light in the state where the upper and lower sides and the front and back of the laminated glass 10 are arranged in the “prescribed direction” and the irradiation pattern in the other state. It is set to make it possible to easily determine the direction.

  The predetermined angle θt satisfying the condition 3 is expressed by the following equation (5).

arcsin ((N _B / N ₀ ) sin (-β + 90 ° -arcsin (N _B / N _A )) <θt (5)

(Condition 4)
Next, as condition 4, when light is incident on the back surface 10B from a direction inclined upward in a state where the upper and lower sides and the front and back of the laminated glass 10 are disposed opposite to the “prescribed direction” as Condition 4 The angle is set such that this light is not totally reflected by the lower side 22D of the light deflection element 22. That is, referring to FIG. 5, when light is made incident from the direction of arrow Y, a predetermined angle θt is set to an angle at which the light is not totally reflected by the lower side surface 22D of the light deflection element 22.

  In the state where the upper and lower sides and the front and back of laminated glass 10 are arranged opposite to the “prescribed direction”, when light is made to enter back surface 10B from the direction inclined upward, this light falls below light deflection element 22. When totally reflected by the side surface 22D, the irradiation pattern is clear to the irradiation pattern of the outgoing light when the test light Lt is incident in a state where the upper and lower sides and the front and back of the laminated glass 10 are disposed in the "specified direction". Differences can be less likely to occur. Therefore, condition 4 is to clarify the difference between the irradiation pattern of the emitted light in the state where the upper and lower sides and the front and back of the laminated glass 10 are arranged in the “prescribed direction” and the irradiation pattern in the other state. It is set to make it possible to easily determine the direction.

  The predetermined angle θt satisfying the condition 4 is expressed by the following equation (6).

arcsin ((N _B / N ₀ ) sin (γ + 90 ° -arcsin (N _B / N _A )) <θt (6)

(Condition 5)
Next, as condition 5, when light is incident on the surface 10A from a direction inclined upward in a state where the upper and lower sides of the laminated glass 10 are disposed opposite to the “prescribed direction” as the predetermined angle θt, The light is set to an angle at which the light is not totally reflected by the lower surface 22D of the light deflection element 22. That is, referring to FIG. 5, when light is made incident from the direction of arrow Z, a predetermined angle θt is set to an angle at which the light is not totally reflected by lower side surface 22D of deflection element 22.

  In the state where the upper and lower sides of the laminated glass 10 are disposed opposite to the “prescribed direction”, when light is made to enter the surface 10B from the direction inclined upward, this light is the lower side surface 22D of the light deflection element 22 If the test pattern Lt is incident when the top and bottom and the front and back of the laminated glass 10 are arranged in the “specified direction”, the irradiation pattern is clearly different from the irradiation pattern of the emitted light. It can be difficult to occur. Therefore, condition 5 is to clarify the difference between the irradiation pattern of the emitted light in the state where the upper and lower sides and the front and back of the laminated glass 10 are arranged in the “prescribed direction” and the irradiation pattern in the other state. It is set to make it possible to easily determine the direction.

  The predetermined angle θt satisfying the condition 5 is expressed by the following equation (7).

arcsin ((N _B / N ₀ ) sin (-γ + 90 ° -arcsin (N _B / N _A )) <θt (7)

  When the predetermined angle θt is set to satisfy the above conditions 1 to 5, the irradiation pattern of the emitted light in the state where the upper and lower sides and the front and back of the laminated glass 10 are arranged in the “prescribed direction”, It becomes possible to distinguish the direction of the laminated glass 10 easily and accurately by clarifying the difference from the irradiation pattern in the non-state.

  Specifically, as shown in FIG. 7A, in a state where the top and bottom and the front and back of the laminated glass 10 are disposed in the “prescribed direction”, the test light Lt is laminated from the direction inclined at a predetermined angle θt. In the case where the light is made incident, the irradiation pattern to be irradiated with the emitted light is confirmed on the upper side of the wall surface Ws (see FIG. 6).

  On the other hand, as shown in FIG. 7B, in a state where the front and back of the laminated glass 10 are disposed opposite to the “prescribed direction” and the upper and lower directions are correctly disposed, the direction inclined at a predetermined angle θt From the above, when the test light Lt is made to be incident on the laminated glass 10, the irradiation pattern to be irradiated with the outgoing light on the lower side of the wall surface Ws is confirmed.

  Further, as shown in FIG. 7C, in a state where the upper and lower sides and the front and back of the laminated glass 10 are disposed opposite to the “prescribed direction”, the test light Lt is laminated from the direction inclined at a predetermined angle θt. In the case where the light is made incident, the irradiation pattern to be irradiated with the emitted light on the lower side of the wall surface Ws is confirmed.

  Further, as shown in FIG. 7D, in a state in which the upper and lower sides of the laminated glass 10 are disposed opposite to the “prescribed direction”, the test light Lt is incident on the laminated glass 10 from the direction inclined at a predetermined angle θt. When it is made to do, the irradiation pattern which emission light is irradiated to the downward side of wall surface Ws is checked.

  When the predetermined angle θt is set to satisfy the conditions 1 to 5 as described above, the upper and lower sides and the front and back sides of the laminated glass 10 are “in the case where the irradiation pattern is such that light is irradiated on the upper side of the wall surface Ws. In the case of being arranged in the “specified direction” and other irradiation patterns, it can be easily and accurately determined based on the irradiation pattern that the upper and lower sides and the front and back of the laminated glass 10 are not arranged in the “specified direction”. And in the direction of the laminated glass 10 can be determined easily and accurately.

  Here, in addition to the above conditions 1 to 5, it is more preferable that the predetermined angle θt satisfies the following condition 6.

(Condition 6)
In condition 6, when light is made to enter the surface 10A from a direction inclined upward with the upper and lower sides and the front and back of the laminated glass 10 arranged in the “prescribed direction”, this light is the first of the upper side surfaces 22U The condition of being set so as to be incident on only the one surface portion 23A is satisfied at a predetermined angle θt.

  In this case, the test light Lt is totally reflected only by the first surface portion 23, and the emitted light is spot-illuminated on the wall surface Ws, so that the irradiation pattern becomes distinctive. Therefore, based on this irradiation pattern, it becomes easier to determine the direction of the laminated glass 10.

  The predetermined angle θt satisfying the condition 6 is expressed by the following equation (8).

_{arcsin ((N A / N 0} ) sin (arctan (tanα + (h / A)))) <θt <arcsin ((N A / N 0) sin (α + 90 ° -arcsin (N B / N A)) ·· (8)

The above formula (8), arctan (tanα + (h / A)) <α + 90 ° -arcsin (N B / N A) is applicable only if satisfied.

  And after the above-mentioned direction discrimination | determination process, the laminated structure 10 is comprised by installing in the opening part 2 the laminated glass 10 in which the direction was discriminate | determined.

  In the embodiment described above, in the direction determining step, the test light Lt is made to enter the laminated glass 10 from the direction inclined at the predetermined angle θt within the design angle range Ra, and the emitted light emitted from the laminated glass 10 Above and below and the front and back of the laminated glass 10 are determined.

  The predetermined angle θt in this direction determination step is such that when light is made incident from a direction inclined at the above angle when the upper and lower sides and the front and back of the laminated glass 10 are arranged in the “specified direction”, this light is deflected It is an angle at which the element 22 totally reflects. Therefore, the outgoing light is totally reflected by the light deflection element 22 and emitted. On the other hand, in the state where the upper and lower sides and the front and back of the laminated glass 10 are not arranged in the “specified direction”, the light deflection element 22 is all intentionally intended even if light is incident from a direction inclined by a predetermined angle θt. It is not designed to reflect. Therefore, the emitted light is emitted in an emission mode different from the state of the “prescribed direction”.

  Thereby, in the direction determining step, the upper and lower sides and the front and back of the laminated glass 10 can be confirmed in the “defined direction” simply by causing the test light Lt to be incident on the laminated glass 10 from the direction inclined at the predetermined angle θt. A difference can be made between the emission aspect and the emission aspect that can be confirmed otherwise. From the difference of this radiation | emission aspect, the direction of the laminated glass 10 can be discriminate | determined.

  Thereby, according to the present embodiment, the direction of the laminated glass 10 can be easily determined, and the laminated glass 10 can be installed in the opening 2 in the correct direction or can be installed. The lighting performance of the

  In particular, according to the present embodiment, the test light Lt is made to enter the laminated glass 10, the emitted light is irradiated to the wall surface Ws, and the direction of the laminated glass 10 is visually determined from the difference in the irradiation pattern. . In this case, since the irradiation pattern can be visually confirmed to determine the direction of the laminated glass 10, the direction determining process can be performed easily and efficiently.

  Further, according to the present embodiment, light is incident on the back surface 10A from the direction inclined upward in a state where the front and back of the laminated glass 10 is disposed opposite to the “specified direction” according to the predetermined angle θt. In this case, the angle is set so that the light is not totally reflected by the light deflection element 22 (condition 3 and condition 4). Furthermore, when light is incident on the surface 10A from a direction inclined upward in a state where the upper and lower sides of the laminated glass 10 are arranged opposite to the specified direction, this light is a light deflection element 22 Is set to an angle that does not cause total reflection (Condition 5). Thereby, the difference between the emission mode (irradiation pattern) of the emitted light when the upper and lower sides and the front and back of the laminated glass 10 are arranged in the “prescribed direction” and the emission mode (irradiation pattern) in the other state is clarified. be able to. Therefore, according to the present embodiment, it is possible to easily and accurately determine the direction of the laminated glass 10 based on the clear difference between the emission modes (irradiation patterns).

  In the present embodiment, when the daylighting sheet 20 in which the light deflection element 22 is asymmetric with respect to the normal direction H but the light deflection element 22 is symmetrical with respect to the normal direction H is used, discrimination in the vertical direction is performed. Does not have to be done. In this case, the condition 5 may not be satisfied. Further, in this case, in the direction determining step, only the determination of the front and back may be performed.

  Further, in the present embodiment, the laminated glass 10 which is the target of the direction determining step is a plurality of light deflection elements arranged in the sheet surface direction of the base 21 formed in a sheet shape and the base 21 in the light collecting sheet 20 And 22. The light deflection element 22 is made of a material having a refractive index lower than that of the base portion 21, and the upper side surface 22U of the light deflection element 22 is formed in a convex broken line shape downward in a longitudinal cross section along the thickness direction In the upper side surface 22U, the angle formed with respect to the normal direction H is larger on the front surface 10A side than on the rear surface 10B side. That is, the angle formed by the first surface portion 23A with the normal direction H is larger than the angle formed by the second surface portion 23B with the normal direction H.

  Here, according to the present embodiment, in response to the use of the above-described daylighting sheet 20, the predetermined angle θt is a state in which the upper and lower sides and the front and back of the laminated glass 10 are arranged in the “prescribed direction”. When light is made incident on the surface 10A from a direction inclined upward, the plane portion of the upper side surface 22U that is the closest to the surface 10A of the upper side surface 22U when the light travels from the direction inclined upward is incident on the surface 10A. The first surface portion 23A is set to be larger than the angle formed with respect to the normal direction H. This is because when the test light Lt is incident on the surface 10A from a direction inclined upward with the predetermined angle θt in a state in which the upper and lower sides and the front and back of the laminated glass 10 are disposed in the “specified direction”, This means that the angle is apt to cause total reflection at the first surface portion 23A of the light deflection element 22.

  As described above, when the test light Lt is mainly totally reflected by the first surface portion 23, the emitted light can be spot-wise irradiated to the wall surface Ws, and the irradiation pattern can be characterized. When the irradiation pattern is characteristic, the direction of the laminated glass 10 can be easily determined based on the irradiation pattern. Therefore, in the present embodiment, in a state where the upper and lower sides and the front and back of laminated glass 10 are arranged in the “prescribed direction”, when light is made to enter surface 10A from a direction inclined upward, the traveling direction of this light is The angle formed with respect to the normal direction H is greater than the angle formed by the plane portion (first surface portion 23A) closest to the surface 10A of the upper side surface 22U with respect to the normal direction H. Set the angle θt. Thus, according to the present embodiment, it is possible to easily and accurately determine the direction of the laminated glass 10 based on the characteristic irradiation pattern.

  Furthermore, in this case, as described in condition 6, light is incident on the surface 10A from a direction inclined upward when the upper and lower sides and the front and back of the laminated glass 10 are disposed in the “specified direction” as the predetermined angle θt It is preferable that the light is set so as to be incident only on the flat surface portion (first surface portion 23A) closest to the surface 10A side of the upper side surface 22U when the light emission is performed. In this case, since the irradiation pattern is remarkably distinctive, the direction of the laminated glass 10 can be more easily and accurately determined based on the irradiation pattern.

In the first embodiment described above, an example of manufacturing the opening structure 1 by installing the laminated glass 10 as the light collecting member in the opening 2 has been described. However, the light collecting sheet 20 as the light collecting member The opening structure may be manufactured by sticking to window glass or the like after determining the direction of. In addition, the light collecting member installed in the opening 2 may be double glass (pair glass) or the like. The multi-layer glass has, for example, a sheet laminate panel on which the daylighting sheet 20 is laminated, and an outer panel and an inner panel disposed on both outer sides of the panel. A space (air layer) is a member provided between at least one of them. In this case, the opening structure is manufactured by determining the direction of the multi-layer glass and then installing it in the opening.
The light collecting member may be a light collecting blind having a slat portion having a light collecting function, a light collecting roll screen formed in a roll screen shape, or the like. In this case, an opening structure is manufactured by installing a daylighting blind or a daylighting roll screen on the exit surface side of a window glass or the like. In the daylighting blind, for example, each slat portion has a structure similar to that of the daylighting sheet 20 described above. In this case, after the direction of such a light receiving blind is determined, the opening structure is manufactured by installing the light receiving blind on the light emitting surface side of a window glass or the like. In addition, the daylighting roll screen is configured to include, for example, a shaft member and the same daylighting sheet 20 having the one end attached to the shaft member. In this case, the opening structure is manufactured by installing the daylighting roll screen on the light emitting surface side of the window glass or the like after determining the direction of the daylighting roll screen as described above.

  Further, the light collecting member to be subjected to the direction determination process may have a light diffusion function. For example, in the above-described laminated glass 10, the first adhesive layer 31 and the second adhesive layer 32 may have a light diffusing function, and the panel has a light diffusing function as represented by template glass and rubbing glass. You may have. Moreover, the daylighting sheet 20 may have a light diffusion layer. In this case, the light emitted from the light emission surface of the light collection member is diffused. However, in the direction determination step, the irradiation can be performed by adjusting the distance between the light emission surface and the light receiving surface (wall surface Ws) that emits the emitted light. The direction of the light collecting member can be easily determined from the pattern. In addition, it can be easily determined by darkening surrounding illumination at the time of direction determination.

Second Embodiment
Next, a second embodiment of the present invention will be described. In the present embodiment, a method of manufacturing a daylighting sheet as a daylighting member will be described. The same components in the present embodiment as those in the first embodiment are given the same reference numerals, and a part of the description will be omitted.

  FIG. 8 is a view for explaining the method of manufacturing the daylighting sheet 20 according to the present embodiment. In summary, the method of manufacturing the daylighting sheet 20 according to the present embodiment includes the preparation step of preparing the daylighting sheet 20 described in the first embodiment, the direction discrimination step of discriminating the upper and lower sides and the front and back of the daylighting sheet 20; And a processing step of processing the daylighting sheet 20 based on the determination result of the direction determination step.

  FIG. 8A is a diagram for explaining the direction determining process in the present embodiment. As shown in the figure, in the present embodiment, the light collecting sheet 20 is held along the vertical direction, and the test light is inclined upward at a predetermined angle θt as in the first embodiment. Lt is applied to the laminated glass 10, and the emitted light is irradiated to the wall surface Ws. Also in this example, the point light source device 100 is used as a device for emitting the test light Lt.

  The content of the direction determining process is the same as that of the laminated glass 10 except that the daylighting sheet 20 is replaced, and thus detailed description will be omitted.

  On the other hand, FIG. 8 (B) is a figure explaining the processing process in this Embodiment. In the processing step according to the present embodiment, an index indicating the direction is provided on the light collecting sheet 20 based on the determination result of the direction determination step. The code | symbol 41 in a figure has shown the parameter | index which shows the sky side (upper part) side, and the code | symbol 42 has shown the parameter | index which shows the surface side. By determining the direction of the daylighting sheet 20 in the direction determining step and providing such indicators 41 and 42, the daylighting sheet 20 can be installed in the correct direction thereafter.

As a modification of the second embodiment, in the case where an index indicating the direction is provided in advance on the daylighting sheet 20, in the processing step, the correctness of the index is determined based on the determination result of the direction determination step. If the direction indicated by the index is different from the direction (the determined direction) of the actual daylighting sheet 20, the index may be corrected.
In addition, although the manufacturing method of the daylighting sheet as the daylighting member has been described here, the daylighting member may be laminated glass, double glazing, daylighting blind, daylighting roll screen or the like as described in the first embodiment. . In the case of manufacturing laminated glass, after determining the direction of the daylighting sheet, for example, in the processing step, laminated glass is manufactured by arranging the daylighting sheet as a desired direction between the glass (multi-layer glass The same is true). In the case of manufacturing the daylighting blind, the daylighting blind is manufactured, for example, by aligning and connecting a plurality of slats in a desired direction in a processing step after determining the direction of the slats. In the case of manufacture of a light collection roll screen, after determining the direction of a light collection sheet, a light collection roll screen is manufactured by connecting a light collection sheet to a shaft member by a desired direction in a processing process, for example. Also, in the case of manufacturing a daylighting sheet, after the direction of the daylighting sheet is determined, for example, in the processing step, the daylighting sheet is made to have a desired orientation, and a functional layer such as an adhesive layer, light diffusion layer, or hard coat layer You may laminate on a daylighting sheet using methods, such as a lamination.

(Modification of light collecting member targeted for direction determination process)
9 to 11 for an example in which the direction determining step is performed on a light collecting member having a configuration different from the light collecting member determined in the direction determining step in the first embodiment and the second embodiment. While explaining. Also in the description of this modification, the same components as those described in the first embodiment and the second embodiment will be denoted by the same reference numerals.

  In the daylighting sheet 20 ′ shown in FIG. 9, three planes of a first surface portion 23A, a second surface portion 23B, and a third surface portion 23C in which the upper side surface 22U of the light deflection element 22 is lined from the incident side to the output side It has a part. The angle formed by the first surface portion 23A with the normal direction H is larger than the angle formed by the second surface portion 23B with the normal direction H, and the angle formed by the second surface portion 23B with the normal direction H is The third surface portion 23C is larger than the angle formed with respect to the normal direction H. On the other hand, the lower side surface 22D of the light deflection element 22 is formed to extend linearly in a cross sectional view.

  Also in such a daylighting sheet 20 ', in a state where the top and bottom and the front and back are disposed in the "prescribed direction", a direction in which the light deflection element 22 is inclined upward at an angle within the design angle range (for example, angle in the figure) The angle of the first surface portion 23A, the angles of the second surface portion 23B and the third surface portion 23C, and the like are designed so as to totally reflect the light incident on the surface from the direction inclined by θ9.

  On the other hand, also in the daylighting sheet 20 ', the upper and lower sides and the front and back are not disposed in the "specified direction", for example, in the state where the upper and lower directions are opposite to the "specified direction", etc. Even when light is incident from a direction inclined at an angle of 1, the desired light collecting performance can not be obtained, in other words, a light collecting performance different from the desired light collecting performance can be obtained. That is, in a state where the upper and lower sides and the front and back are arranged in the “prescribed direction”, when light is incident upward from a direction inclined at an angle within the design angle range, the light is totally reflected by the light deflection element 22 Thus, an emission aspect can be obtained which is emitted upward from the back side. On the other hand, in the state where the upper and lower sides and the front and back are not arranged in the “specified direction”, different emission modes can be obtained even when light is incident under the same conditions.

  Therefore, the direction determination process similar to that of the first embodiment and the second embodiment can also be performed on such a daylighting sheet 20 '. That is, as shown in FIG. 9, the test light Lt is made incident from a direction inclined at a predetermined angle within the design angle range (for example, the direction inclined by the angle θ9 in the drawing) and emitted from the daylighting sheet 20 ′. Based on the emitted light, at least one of the upper and lower sides and the front and back of the daylighting sheet 20 'can be determined.

  Also in the above-described predetermined angle according to this example, when light is incident on the back surface from the direction inclined upward in a state in which the front and back of the daylighting sheet 20 is disposed opposite to the “specified direction”, this light The angle is preferably set so as not to be totally reflected by the light deflection element 22 (conditions similar to the conditions 3 and 4 described in the first embodiment). That is, when light is made to enter from the direction of arrow X or arrow Y in FIG. 9, it is preferable to set the angle at which the light is not totally reflected by the light deflection element 22.

  In addition, also in the above-described predetermined angle according to this example, when light is incident on the surface from the direction inclined upward, in a state where the upper and lower sides of the daylighting sheet 20 ′ are disposed opposite to the “prescribed direction”, It is preferable that the light is set so that the light is not totally reflected by the light deflection element 22 (conditions similar to the condition 5 described in the first embodiment). That is, when light is made to enter from the direction of arrow Z in FIG. 9, it is preferable to set the angle at which this light is not totally reflected by the light deflection element 22.

  Next, in the daylighting sheet 20 '' shown in FIG. 10, the upper side surface 22U of the light deflection element 22 is formed to extend linearly in a cross sectional view. The upper side surface 22U is formed to incline downward toward the back surface side. On the other hand, the lower side surface 22D of the light deflection element 22 is formed to extend linearly in a cross sectional view.

  Also in such a daylighting sheet 20 ′ ′, when the top and bottom and the front and back are arranged in the “prescribed direction”, the light deflection element 22 is inclined upward at an angle within the design angle range (for example, in FIG. The angle or the like of the upper side surface 22U is designed so as to totally reflect the light incident on the surface from the direction inclined by the angle θ10.

  On the other hand, also in this daylighting sheet 20 ′ ′, the design angle range upwards in the state where the upper and lower sides and the front and rear are not arranged in the “specified direction”, for example, the upper and lower direction is opposite to the “specified direction” Even when light is incident from a direction inclined at an inner angle, a desired light collecting performance can not be obtained, in other words, a light collecting performance different from the desired light collecting performance can be obtained. That is, in a state where the upper and lower sides and the front and back are arranged in the “prescribed direction”, when light is incident upward from a direction inclined at an angle within the design angle range, the light is totally reflected by the light deflection element 22 Thus, an emission aspect can be obtained which is emitted upward from the back side. On the other hand, in the state where the upper and lower sides and the front and back are not arranged in the “specified direction”, different emission modes can be obtained even when light is incident under the same conditions.

  Therefore, the direction determination process similar to that of the first embodiment and the second embodiment can also be performed on such a daylighting sheet 20 ′ ′. That is, as shown in FIG. 10, the test light Lt is incident from a direction inclined at a predetermined angle within the design angle range (for example, a direction inclined at an angle θ10 in the drawing) and emitted from the daylighting sheet 20 ′ ′ Based on the emitted light, at least one of the upper and lower sides and the front and back of the daylighting sheet 20 ′ ′ can be determined.

  Also in the above-described predetermined angle according to this example, when light is incident on the back surface from the direction inclined upward in a state in which the front and back of the daylighting sheet 20 is disposed opposite to the “specified direction”, this light The angle is preferably set so as not to be totally reflected by the light deflection element 22 (conditions similar to the conditions 3 and 4 described in the first embodiment). That is, when light is made incident from the direction of arrow X or arrow Y in FIG. 10, it is preferable to set the angle at which the light is not totally reflected by the light deflection element 22.

  Moreover, also in the above-mentioned predetermined angle concerning this example, when light is incident on the surface from the direction inclined upward in the state where the upper and lower sides of the daylighting sheet 20 ′ ′ are disposed opposite to the “prescribed direction”. Preferably, the angle is set such that the light is not totally reflected by the light deflection element 22 (conditions similar to condition 5 described in the first embodiment). That is, when light is made incident from the direction of arrow Z in FIG. 10, it is preferable to set the angle at which the light is not totally reflected by the light deflection element 22.

  Next, in the daylighting sheet 20 ′ ′ ′ shown in FIG. 11, the upper side surface 22U of the light deflection element 22 is formed in a curved shape that is convex downward in a cross sectional view. On the other hand, the lower side surface 22D of the light deflection element 22 is formed to extend linearly in a cross sectional view.

  Also in such a daylighting sheet 20 ′ ′ ′, when the top and bottom and the front and back are disposed in the “specified direction”, the light deflection element 22 is inclined upward at an angle within the design angle range (for example, in the figure The shape or the like of the upper side surface 22U is designed so as to totally reflect the light incident on the surface from the direction inclined by the angle θ11.

  On the other hand, also in this daylighting sheet 20 ′ ′ ′, when the upper and lower sides and the front and rear are not disposed in the “prescribed direction”, for example, in the state where the upper and lower directions are opposite to the “prescribed direction”, the design angle is upward Even when light is incident from a direction inclined at an angle within the range, desired light collecting performance can not be obtained, in other words, light collecting performance different from the desired light collecting performance can be obtained. That is, in a state where the upper and lower sides and the front and back are arranged in the “prescribed direction”, when light is incident upward from a direction inclined at an angle within the design angle range, the light is totally reflected by the light deflection element 22 Thus, an emission aspect can be obtained which is emitted upward from the back side. On the other hand, in the state where the upper and lower sides and the front and back are not arranged in the “specified direction”, different emission modes can be obtained even when light is incident under the same conditions.

  Therefore, the direction determination process similar to that of the first embodiment and the second embodiment can be performed on such a daylighting sheet 20 ′ ′ ′. That is, as shown in FIG. 11, the test light Lt is made incident from a direction inclined at a predetermined angle within the design angle range (for example, the direction inclined by the angle θ11 in the drawing), and emitted from the daylighting sheet 20 ′ ′ ′ Based on the emitted light, at least one of the upper and lower sides and the front and back of the daylighting sheet 20 ′ ′ ′ can be determined.

  Also in the above-described predetermined angle according to this example, when light is incident on the back surface from the direction inclined upward in a state where the front and back of the daylighting sheet 20 ′ ′ ′ are disposed opposite to the “prescribed direction”, It is preferable that the light is set so that the light is not totally reflected by the light deflection element 22 (conditions similar to Condition 3 and Condition 4 described in the first embodiment). That is, when light is made to enter from the direction of arrow X or arrow Y in FIG. 11, it is preferable to set the angle at which the light is not totally reflected by the light deflection element 22.

  Moreover, also in the above-mentioned predetermined angle concerning this example, when light is incident on the surface from the direction inclined upward in the state where the upper and lower sides of the daylighting sheet 20 ′ ′ ′ are arranged opposite to the “specified direction”. Preferably, the angle is set such that the light is not totally reflected by the light deflection element 22 (conditions similar to Condition 5 described in the first embodiment). That is, when light is made to enter from the direction of arrow Z in FIG. 11, it is preferable to set the angle at which the light is not totally reflected by the light deflection element 22.

<Example>
Next, an embodiment will be described in which the daylighting sheet 20 described in the first embodiment in which specific angles and dimensions are set is prepared, and the direction determination process is performed on the daylighting sheet 20. With reference to FIG. 5, the daylighting sheet 20 to be subjected to the direction determining process used in this embodiment has the dimensions, angles, and refractive indexes shown in Table 1 below.

  The predetermined angle θt in this embodiment can be set to an angle within a design angle range Ra determined from the above-described angles α and β. However, in the present embodiment, the predetermined angle θt satisfying the conditions 1 to 6 described in the first embodiment is calculated as follows.

Formula (2) which satisfies Condition 1 is the following.
arcsin ((N _B / N ₀ ) sin α) <θt <arc sin ((N _A / N ₀ ) sin (α + 90 ° -arcsin (N _B / N _A )) (2)

  Based on this equation, the predetermined angle θt satisfies 22.5 ° <θt <70.8 ° as the condition 1.

Formula (4) which satisfies condition 2 is the following.
arcsin ((N _B / N ₀ ) sin (β + 90 ° -arcsin (N _B / N _A )) <θt (4)

  Based on this equation, the predetermined angle θt satisfies 32.8 ° <θt as the condition 2.

Formula (5) which satisfies Condition 3 is the following.
arcsin ((N _B / N ₀ ) sin (-β + 90 ° -arcsin (N _B / N _A )) <θt (5)

  Based on this equation, the predetermined angle θt satisfies 32.8 ° <θt as the condition 3.

Formula (6) which satisfies the condition 4 is as follows.
arcsin ((N _B / N ₀ ) sin (γ + 90 ° -arcsin (N _B / N _A )) <θt (6)

  Based on this equation, the predetermined angle θt satisfies 46.7 ° <θt as the condition 4.

Formula (7) which satisfies the condition 5 is the following.
arcsin ((N _B / N ₀ ) sin (-γ + 90 ° -arcsin (N _B / N _A )) <θt (7)

  Based on this equation, the predetermined angle θt satisfies 20.1 ° <θt as the condition 5.

  From the above, the predetermined angle θt satisfying the conditions 1 to 5 is in the range of 46.7 ° <θt <70.8 °.

  Further, in addition to the conditions 1 to 5, the predetermined angle θt which satisfies the condition 6 described in the above-described first embodiment is calculated as follows.

That is, Formula (8) which satisfies Condition 6 is the following.
_{arcsin ((N A / N 0} ) sin (arctan (tanα + (h / A)))) <θt <arcsin ((N A / N 0) sin (α + 90 ° -arcsin (N B / N A)) ·· (8)

  Based on this equation, the predetermined angle θt satisfying the condition 6 is 51.7 ° <θt <70.8 °.

  FIG. 12 shows that the test light Lt is incident on the daylighting sheet 20 by setting the predetermined angles θt to 40 °, 50 °, 60 ° and 70 ° in this embodiment, and the light is emitted from the daylighting sheet 20 Shows the emission intensity distribution of the emitted light.

  12A shows the case where the predetermined angle θt is 40 °, the case where the predetermined angle θt is 50 °, and the case where the predetermined angle θt is 60 ° when the predetermined angle θt is 50 °. Shows a case where the predetermined angle θt is 70 °.

  Moreover, in FIG. 12 (A)-(D), the continuous line has shown the radiation intensity distribution in case the surface faces the incident side of test light, and the upper and lower sides of the daylighting sheet 20 and "front and back" are "prescribed directions." An alternate long and short dash line indicates an emission intensity distribution in the case where the front and back sides of the daylighting sheet 20 are disposed opposite to the “prescribed direction” and the upper and lower directions are properly arranged (front and back reverse). The two-dot chain line indicates the emission intensity distribution in the case where the top and bottom and the front and back of the daylighting sheet 20 are arranged in the opposite direction to the “prescribed direction” (turning upside down). The broken line shows the emission intensity distribution in the case where the upper and lower sides of the laminated glass 10 are disposed opposite to the “specified direction” and the front and back directions are correctly disposed (upside down).

  Furthermore, in these emission intensity distributions, it means that the light intensity is larger as the drawn curve extends to the outer peripheral side. Also, the longer the drawn curve extends upward with respect to the normal direction H, the more the light bounces upward, and the drawn curve extends downward with respect to the normal direction H Indicates that the light is emitted downward.

  As shown in FIG. 12A, when the predetermined angle θt is 40 °, there is not a clear difference between the “prescribed direction” and the emission intensity in the other cases, so that “the prescribed direction”. It is difficult to determine that the daylighting sheet 20 to be discriminated is the “specified direction” by visual observation from the emission mode (irradiation pattern) of the emitted light. However, even in such a case, in the emission mode of the emitted light in the “prescribed direction”, a large amount of light bouncing upward is observed, so the direction of the daylighting sheet 20 based on such a feature Can be determined.

  On the other hand, in the case where the predetermined angle θt is 50 °, 60 °, 70 ° satisfying the conditions 1 to 5, as shown in FIGS. 12B to 12D, the "specified direction" and other cases There is a clear difference in the emission intensity between the light source sheet 20 and the daylighting sheet 20 to be discriminated by visual observation from the emission mode (irradiation pattern) of the emitted light in the “specified direction” in the “specified direction”. It can be easily determined that there is. Therefore, from this result, if the predetermined angle θt is set so as to satisfy the conditions 1 to 5, it can be easily determined that the daylighting sheet 20 is in the “specified direction”. It was confirmed that the direction could be easily determined.

  Further, in FIGS. 12 (C) and 12 (D) that satisfy the condition 6, the intensity of the emitted light in the “prescribed direction” is larger than the other angles (50 °). In this case, light bouncing upward is clearly emitted. The direction of the daylighting sheet 20 can be easily determined based on such features. Therefore, from this result, if the predetermined angle θt is set so as to satisfy the condition 6, it can be easily and accurately determined that the daylighting sheet 20 is the “prescribed direction”. As a result, the direction of the daylighting sheet 20 It was confirmed that it could be easily determined.

DESCRIPTION OF SYMBOLS 1 Opening structure 2 with a lighting function Opening 10 Laminated glass 10A Front surface 10B Back surface 10U Upper part 10D Lower part 12 Outer panel 13 Inner panel 14 Frame member 20, 20 ', 20'',20''' Daylighting sheet 21 Base 21A Groove 22 Light Deflecting element 22U upper side 22D lower side 23A first surface 23B second surface 23C third surface 31 first adhesive layer 32 second adhesive layer θt predetermined angle W wall Lt test light Ra design angle range Ws wall surface

Claims (20)

A light deflection element is provided that totally reflects light incident on the surface from a direction inclined at an angle within a design angle range in a state where the top and bottom and the front and back are arranged in a specified direction, and the light is totally reflected by the light deflection element A preparation step of preparing a light collecting member for emitting light from the back side;
A direction determining step of determining at least one of the top and bottom and the front and back of the light collecting member;
An installation step of installing the light collecting member at an opening formed in the structure based on the determination result of the direction determining step to configure an opening structure with a light collecting function;
Equipped with
In the direction determining step, test light is made to enter the light collecting member from a direction inclined at a predetermined angle within the design angle range, and the upper and lower and front and back sides of the light collecting member are based on the emitted light emitted from the light collecting member. Determine at least one of
A method of manufacturing an aperture structure with a daylighting function. The predetermined angle is determined by the light deflection element when light is incident on the back surface from a direction inclined upward in a state in which the front and back surfaces of the light collecting member are disposed opposite to the prescribed direction. It is set to an angle that does not totally reflect,
The manufacturing method of the opening structure with a lighting function of Claim 1. The predetermined angle is determined by the light deflection element when light is incident on the surface from a direction inclined upward in a state in which the upper and lower sides of the light collecting member are disposed opposite to the predetermined direction. It is set to an angle that does not totally reflect,
The manufacturing method of the opening structure with a lighting function of Claim 1 or 2. The light collecting member includes a base formed in a sheet shape, and a plurality of the light deflection elements arranged in the sheet surface direction of the base.
The light deflection element comprises a material of lower refractive index than the base,
The upper side surface of the light deflection element has a thickness which is equal to the thickness of the light collection member in a state in which the light collection member is arranged such that the upper and lower sides and the front and back become the specified direction with the direction in which the plurality of light deflection elements are arranged It is formed in the shape of a broken line or curve convex downward in the longitudinal cross section along the direction,
The method according to any one of claims 1 to 3, wherein the upper side surface makes an angle with the normal direction of the base larger on the front side than on the back side. . The upper side surface of the light deflection element is formed in a broken line in a longitudinal section along the thickness direction of the light collecting member,
When the light is made to enter the surface from the direction inclined upward in a state where the upper and lower sides and the front and back of the light collecting member are arranged in the specified direction, the predetermined angle is the normal of the traveling direction of the light The angle formed with respect to the direction is set such that the plane portion of the upper side surface closest to the surface side is larger than the angle formed with the normal direction.
The manufacturing method of the opening structure with a lighting function of Claim 4. When the light is made to enter the surface from the direction inclined upward in the state where the upper and lower and the front and back of the light collecting member are arranged in the specified direction, the predetermined angle is one of the upper side surfaces It is set to be incident only on the flat portion closest to the surface side,
The manufacturing method of the opening structure with a lighting function of Claim 5. A light deflection element is provided that totally reflects light incident on the surface from a direction inclined at an angle within a design angle range in a state where the top and bottom and the front and back are arranged in a specified direction, and the light is totally reflected by the light deflection element A preparation step of preparing a light collecting member for emitting light from the back side;
A direction determining step of determining at least one of the top and bottom and the front and back of the light collecting member;
A processing step of processing the light collecting member based on the determination result of the direction determination step;
Equipped with
In the direction determining step, test light is made to enter the light collecting member from a direction inclined at a predetermined angle within the design angle range, and the upper and lower and front and back sides of the light collecting member are based on the emitted light emitted from the light collecting member. Determine at least one of
The manufacturing method of a daylighting member. The predetermined angle is determined by the light deflection element when light is incident on the back surface from a direction inclined upward in a state in which the front and back surfaces of the light collecting member are disposed opposite to the prescribed direction. It is set to an angle that does not totally reflect,
The manufacturing method of the lighting member of Claim 7. The predetermined angle is determined by the light deflection element when light is incident on the surface from a direction inclined upward in a state in which the upper and lower sides of the light collecting member are disposed opposite to the predetermined direction. It is set to an angle that does not totally reflect,
A manufacturing method of the daylighting member according to claim 7 or 8. The light collecting member includes a base formed in a sheet shape, and a plurality of the light deflection elements arranged in the sheet surface direction of the base.
The light deflection element comprises a material of lower refractive index than the base,
The upper side surface of the light deflection element has a thickness which is equal to the thickness of the light collection member in a state in which the light collection member is arranged such that the upper and lower sides and the front and back become the specified direction It is formed in the shape of a broken line or curve convex downward in the longitudinal cross section along the direction,
In the upper side surface, an angle formed with respect to the normal direction of the base is larger on the front side than on the back side.
A manufacturing method of the daylighting member according to any one of claims 7 to 9. The upper side surface of the light deflection element is formed in a broken line in a longitudinal section along the thickness direction of the light collecting member,
When the light is made to enter the surface from the direction inclined upward in a state where the upper and lower sides and the front and back of the light collecting member are arranged in the specified direction, the predetermined angle is the normal of the traveling direction of the light The angle formed with respect to the direction is set such that the plane portion of the upper side surface closest to the surface side is larger than the angle formed with the normal direction.
The manufacturing method of the lighting member of Claim 10. When the light is made to enter the surface from the direction inclined upward in the state where the upper and lower and the front and back of the light collecting member are arranged in the specified direction, the predetermined angle is one of the upper side surfaces It is set to be incident only on the flat portion closest to the surface side,
A manufacturing method of the daylighting member according to claim 11. In the processing step, an index indicating a direction is provided to the light collecting member based on the determination result of the direction determination step.
A manufacturing method of the daylighting member according to any one of claims 7 to 12. An indicator indicating the direction is provided in advance to the light collecting member,
In the processing step, based on the determination result of the direction determination step, correctness / incorrectness of the index is confirmed, and when the direction indicated by the index and the direction of the actual light collecting member are different, the index is corrected.
A manufacturing method of the daylighting member according to any one of claims 7 to 12. A light deflection element is provided that totally reflects light incident on the surface from a direction inclined at an angle within a design angle range in a state where the top and bottom and the front and back are arranged in a specified direction, and the light is totally reflected by the light deflection element A preparation step of preparing a light collecting member for emitting light from the back side;
A direction determining step of determining at least one of the top and bottom and the front and back of the light collecting member;
Equipped with
In the direction determining step, test light is made to enter the light collecting member from a direction inclined at a predetermined angle within the design angle range, and the upper and lower and front and back sides of the light collecting member are based on the emitted light emitted from the light collecting member. Determine at least one of
Method of determining the direction of the light collecting member. The predetermined angle is determined by the light deflection element when light is incident on the back surface from a direction inclined upward in a state in which the front and back surfaces of the light collecting member are disposed opposite to the prescribed direction. It is set to an angle that does not totally reflect,
The direction determination method of the lighting member of Claim 15. The predetermined angle is determined by the light deflection element when light is incident on the surface from a direction inclined upward in a state where the upper and lower sides of the light collecting member are installed opposite to the prescribed direction. It is set to an angle that does not totally reflect,
The direction determination method of the lighting member of Claim 15 or 16. The light collecting member includes a base formed in a sheet shape, and a plurality of the light deflection elements arranged in the sheet surface direction of the base.
The light deflection element comprises a material of lower refractive index than the base,
The upper side surface of the light deflection element has a thickness which is equal to the thickness of the light collection member in a state in which the light collection member is arranged such that the upper and lower sides and the front and back become the specified direction with the direction in which the plurality of light deflection elements are arranged It is formed in the shape of a broken line or curve convex downward in the longitudinal cross section along the direction,
In the upper side surface, an angle formed with respect to the normal direction of the base is larger on the front side than on the back side.
The direction determination method of the lighting member in any one of Claims 15-17. The upper side surface of the light deflection element is formed in a broken line in a longitudinal section along the thickness direction of the light collecting member,
When the light is made to enter the surface from the direction inclined upward in a state where the upper and lower sides and the front and back of the light collecting member are arranged in the specified direction, the predetermined angle is the normal of the traveling direction of the light The angle formed with respect to the direction is set such that the plane portion of the upper side surface closest to the surface side is larger than the angle formed with the normal direction.
The direction determination method of the lighting member according to claim 18. When the light is made to enter the surface from the direction inclined upward in the state where the upper and lower and the front and back of the light collecting member are arranged in the specified direction, the predetermined angle is one of the upper side surfaces It is set to be incident only on the flat portion closest to the surface side,
The direction determination method of the daylighting member according to claim 19.

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