Light-transmissive building member and method for manufacturing the same

Abstract

To provide a construction member with light-transmittance and its manufacturing method, which is easy to be manufactured, while having an aesthetically pleasing surface.SOLUTION: A light-transmitting construction member 10A consists of a first flat plate part 11 and a second flat plate part 12, each provided to form a surface 11f and a 12f, respectively, and a cured body part 13 formed by curing a fluid material inside the first flat plate part 11 and the second flat plate part 12, and a light transmission part 14 embedded in the cured body part 13 and provided so that the end faces 14a, 14b are exposed to the surfaces 11f, 12f formed by the first flat part 11 and the second flat part 12, respectively.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a construction member having light transmissibility and a method for manufacturing the same.

Background Art

[0002] Conventionally, for the purpose of, for example, daylighting of buildings, a member having light transmissibility that allows light to penetrate from one side surface to the opposite side surface of a member forming a wall or the like, which is formed by curing a material having fluidity such as concrete, is sometimes embedded inside the member. For example, Patent Document 1 discloses a configuration of a building block in which an optical fiber is embedded in a casting material. In this configuration, one end and the other end of the optical fiber are arranged to end at the positions of the first side surface and the second side surface, respectively. The building block is produced by arranging a casting material and a fiber layer in a mold, and after the casting material is solidified, cutting the solidified molded body so that the individual ends of the fiber layer end at the side portions of the building block. In the configuration as disclosed in Patent Document 1, after the optical fiber is embedded in the casting material, it is necessary to cut the optical fiber together with the casting material as described above. For this reason, the end face of the optical fiber and the surface of the casting material become rough, and the appearance of the building block is impaired. In order to improve the appearance, it is necessary to adjust the state of the end face of the optical fiber and the concrete surface, which is time-consuming.

[0003] Further, Patent Document 2 discloses a method for manufacturing a light transmissive member by inserting an optical fiber across the openings of a pair of spacers provided with holes through which a plurality of optical fibers can be inserted, pouring highly fluid concrete between the pair of spacers, and cutting the optical fiber at the position of the spacer after the concrete has hardened. In the method disclosed in Patent Document 2, when cutting the optical fiber at the boundary between the spacer and the concrete, the cut surfaces of the optical fibers may not be aligned, which may impair the aesthetic appearance. In this case, post-processing may be performed to align the cut surfaces, but this requires extra effort. Also, when cutting the optical fiber, there is a possibility of cutting the concrete as well. In this case, unevenness will occur on the surface of the concrete due to the cutting of the concrete, so it takes time and effort to level the unevenness and repair the aesthetic appearance. Also, in the method disclosed in Patent Document 2, water generated during the hardening process of the concrete seeps out along the interface between the optical fiber and the concrete to the interface between the concrete and the spacer. As a result, on the surface of the concrete in contact with the spacer, the concrete around the optical fiber may have a different color tone from the other parts of the concrete. Since this surface of the concrete appears as the surface of a building constructed using a light-transmitting member, the aesthetic appearance is impaired due to the partial difference in the surface color tone as described above. In such a case, it takes time and effort to adjust the color tone of the concrete.

[0004] Patent Document 3 also discloses a configuration in which both ends of a transparent body are exposed, a transparent body unit in which the middle part of the transparent body is hardened by a fixing material is manufactured, the transparent body unit is fixed to a reinforcing bar with both tip end faces of the transparent body abutting against a weir plate, fresh concrete is placed inside a formwork, the formwork is removed after the concrete has hardened, and both tip end faces of the transparent body are made to appear on the concrete surface. In a configuration as disclosed in Patent Document 3, for example, when constructing a wall, the concrete body constituting the wall is provided such that the formwork corresponding to the wall surface extends in the vertical direction and is formed by so-called vertical casting. Then, the air entrained in the concrete during concrete placement may stay below the transparent body and may not be able to escape even when the concrete is compacted. As a result, the air that cannot escape appears as bubbles on the surface of the concrete body. Since the surface of this concrete body becomes the surface of the wall, the bubbles appear on the surface of the wall. For this reason, the aesthetics are impaired. Repairing these bubbles with mortar or the like takes time. Further, if cement paste or the like enters between the surface of the transparent body exposed on the surface of the wall and the formwork, the surface of the transparent body becomes dirty, and it also takes extra time to clean this.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Patent Document 2

Patent Document 3

Summary of the Invention

Problems to be Solved by the Invention

[0006] The problem to be solved by the present invention is to provide a light - transmissive construction member having an aesthetic surface and being easy to manufacture, and a method for manufacturing the same.

Means for Solving the Problems

[0007] In order to solve the above problems, the present invention employs the following means. That is, the light-transmissive construction member of the present invention is a light-transmissive construction member, comprising a first flat plate portion and a second flat plate portion each provided so as to form a surface, a cured body portion formed by curing a fluid material inside the first flat plate portion and the second flat plate portion, and a light-transmissive portion embedded in the cured body portion and provided such that an end face thereof is exposed on the surface formed by each of the first flat plate portion and the second flat plate portion. According to such a configuration, the cured body portion formed by curing the fluid material is formed inside the first flat plate portion and the second flat plate portion, and the surface of the construction member is formed by each of the first flat plate portion and the second flat plate portion. That is, in the portion where the first flat plate portion and the second flat plate portion are provided, the cured body portion is not exposed on the surface of the construction member, and the cured body portion does not become the surface of the construction member. Therefore, even if bubbles are mixed in when forming the cured body portion, or a change in color tone or the like occurs in the cured body portion, these can be suppressed from being exposed on the surface of the construction member. In addition, since the first flat plate portion and the second flat plate portion forming the surface of the construction member are manufactured as members separate from the cured body portion, when manufacturing the construction member itself, operations such as cutting and flattening the surface are not required. Furthermore, the end face of the light-transmissive portion is provided so as to be exposed on the surface of the construction member formed by the first flat plate portion and the second flat plate portion. Since this surface of the construction member is separated from the surface of the cured body portion by the thickness of the first flat plate portion and the second flat plate portion, the end face of the light-transmissive portion exposed on the surface of the construction member is provided separately from the cured body portion. For this reason, when forming the cured body portion, it can be suppressed that the fluid material stains the end face of the light-transmissive portion. As described above, by providing the first flat plate portion and the second flat plate portion, the aesthetics of the construction member are maintained, so that no labor is required to adjust the aesthetics during manufacturing. In addition, since the cured body portion can be formed using the first flat plate portion and the second flat plate portion as a mold, it is not necessary to remove the mold. As a result, it becomes possible to provide a light-transmissive construction member that has a surface with aesthetics and is easy to manufacture.

[0008] In one aspect of the present invention, the first flat plate portion and the second flat plate portion are formed of any one of cement paste, mortar, fiber-reinforced mortar, concrete, fiber-reinforced concrete, steel plate, and wooden plate. According to such a configuration, when the first flat plate portion and the second flat plate portion are formed of cement paste, mortar, fiber-reinforced mortar, concrete, or fiber-reinforced concrete, the first flat plate portion and the second flat plate portion having a predetermined shape can be produced in advance with cement paste, mortar, fiber-reinforced mortar, concrete, or fiber-reinforced concrete. In this case, the surface (appearance) of the construction member can be formed of a concrete-based material. Further, if fiber-reinforced mortar or fiber-reinforced concrete is used, the strength of the first flat plate portion and the second flat plate portion can be increased. Also, when the first flat plate portion and the second flat plate portion are formed of a steel plate or a wooden plate, the appearance of the construction member can be formed of a steel material or a wood-based material.

[0009] In one aspect of the present invention, the light-transmitting portion is formed in a rod shape with a circular cross-section by a material having light-transmitting properties, which is any one of a glass material and a resin material. According to such a configuration, by forming the light-transmitting portion with a material having light-transmitting properties, which is any one of a glass material and a resin material, and having a rod shape with a circular cross-section, the light-transmitting portion can be made to have a certain strength. By using such a light-transmitting portion, when manufacturing the construction member, the positioning work of the light-transmitting portion, the work of providing the end face so as to be exposed on each surface of the first flat plate portion and the second flat plate portion, the work of hardening the fluid material to form the hardened body portion, etc. can be easily handled.

[0010] In one aspect of the present invention, the hardened body portion is formed of concrete. According to such a configuration, when forming the hardened body portion, it is only necessary to pour and harden concrete as a fluid material inside the first flat plate portion and the second flat plate portion, and the manufacturing of the construction member can be easily performed.

[0011] The manufacturing method of the light-transmissive construction member of the present invention is a manufacturing method of a light-transmissive construction member, which comprises fabricating a first flat plate portion and a second flat plate portion, opening holes in each of the first flat plate portion and the second flat plate portion, inserting a light-transmissive portion into each of the holes of the first flat plate portion and the second flat plate portion such that an end face thereof is exposed on each surface of the first flat plate portion and the second flat plate portion, pouring a fluid material inside the first flat plate portion and the second flat plate portion and curing it to form a cured body portion so as to embed the light-transmissive portion. According to such a configuration, after inserting the light-transmissive portion into the holes opened in the previously fabricated first flat plate portion and second flat plate portion such that the end face thereof is exposed on the surfaces of the first flat plate portion and the second flat plate portion, by pouring a fluid material inside the first flat plate portion and the second flat plate portion and curing it, it becomes possible to provide a manufacturing method of a light-transmissive construction member that is easy to manufacture while having a surface with aesthetic appearance.

[0012] In one aspect of the present invention, the first flat plate portion and the second flat plate portion are fabricated by plastering horizontally with any one of cement paste, mortar, fiber-reinforced mortar, concrete, and fiber-reinforced concrete, and the first flat plate portion and the second flat plate portion are erected such that each of the surfaces formed as the lower surface during fabrication faces outward, and the cured body portion is formed inside the first flat plate portion and the second flat plate portion. According to such a configuration, when the first flat plate portion and the second flat plate portion are formed of cement paste, mortar, fiber-reinforced mortar, concrete, or fiber-reinforced concrete, by fabricating the first flat plate portion and the second flat plate portion by plastering horizontally, the surfaces of the first flat plate portion and the second flat plate portion formed as the lower surface during fabrication are less likely to have remaining air bubbles and can be made into smooth surfaces. By arranging the smoothly formed lower surface to face outward and form the surface of the construction member, it is possible to suppress the impairment of the aesthetic appearance of the surface of the construction member.

Effect of the Invention

[0013] According to the present invention, it is possible to provide a light-transmissive construction member having an aesthetically pleasing surface and being easy to manufacture, and a method for manufacturing the same.

Brief Description of the Drawings

[0014]

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Figure 20

Mode for Carrying Out the Invention

[0015] Hereinafter, with reference to the accompanying drawings, embodiments for implementing a construction member having light transmissivity according to the present invention and a method for manufacturing the same will be described based on the drawings. FIG. 1 shows an example of a structure including a wall made of a construction member having light transmissivity according to the present embodiment. FIG. 2 is a cross-sectional view taken along the line I-I of FIG. 1. As shown in FIG. 1, in the present embodiment, the construction member 10A having light transmissivity is applied to, for example, the wall 2 of the building 1. The wall 2 is provided on the frame of the building 1 including columns 3 and beams 4. The wall 2 is provided in a portion surrounded by adjacent columns 3 and beams 4 that are vertically aligned with each other. In the present embodiment, the construction member 10A is formed in a plate shape such that its thickness matches the thickness of the wall 2. As shown in FIG. 2, the construction member 10A that constitutes the wall 2 has light transmissivity. The construction member 10A includes a first flat plate portion 11, a second flat plate portion 12, a cured body portion 13, and a light transmissive portion 14. The first flat plate portion 11 and the second flat plate portion 12 are spaced apart from each other at intervals in the thickness direction of the construction member 10A. The first flat plate portion 11 and the second flat plate portion 12 are disposed at both ends in the thickness direction of the construction member 10A. The first flat plate portion 11 and the second flat plate portion 12 are formed in a flat plate shape along a plane orthogonal to the thickness direction of the construction member 10A. The first flat plate portion 11 and the second flat plate portion 12 are each provided so as to form the surfaces 11f and 12f on both sides in the thickness direction of the construction member 10A.

[0016] The first flat plate portion 11 and the second flat plate portion 12 are formed, for example, by kneading and curing any one of cement-based materials such as cement paste, mortar, fiber-reinforced mortar, concrete, and fiber-reinforced concrete in a predetermined composition. Here, cement paste is a material that does not use aggregate and contains cement and water. Mortar is a material that does not use coarse aggregate and contains, for example, fine aggregate with a maximum size of less than 10 mm, cement, and water. Fiber-reinforced mortar is a material obtained by mixing synthetic fibers, steel fibers, etc. as a reinforcing material into mortar. Concrete is a material that contains, for example, fine aggregate with a maximum size of less than 10 mm, coarse aggregate with a maximum size of 10 mm or more, cement, and water. High-strength concrete can also be adopted as the concrete. Fiber-reinforced concrete is a material obtained by mixing synthetic fibers, steel fibers, etc. as a reinforcing material into concrete. The cementitious material forming the first flat plate portion 11 and the second flat plate portion 12 may include, for example, powdered pigments for coloring. Thereby, the appearance of the building member 10A can be improved. When the first flat plate portion 11 and the second flat plate portion 12 are formed of any cementitious material such as cement paste, mortar, fiber-reinforced mortar, concrete, or fiber-reinforced concrete, a cementitious material kneaded in a predetermined composition is used in advance to produce the first flat plate portion 11 and the second flat plate portion 12 having a predetermined shape. As will be described later, the first flat plate portion 11 and the second flat plate portion 12 are used as embedded formworks when forming the hardened body portion 13. Therefore, it is necessary to set the thickness of the first flat plate portion 11 and the second flat plate portion 12 so that the strength sufficient to resist the pressure of the fluid material forming the hardened body portion 13 can be ensured. On the other hand, in order to facilitate handling, the first flat plate portion 11 and the second flat plate portion 12 are preferably formed as thin as possible without being excessively thick. For example, when using coarse aggregate with a particle size of about 20 mm as the coarse aggregate, the thickness of the first flat plate portion 11 and the second flat plate portion 12 is preferably about 30 mm so that the coarse aggregate is sufficiently covered. Also, the first flat plate portion 11 and the second flat plate portion 12 may be formed of a steel plate or a wooden plate having a predetermined thickness.

[0017] The hardened body portion 13 is formed by hardening a fluid material inside (in this embodiment, between the first flat plate portion 11 and the second flat plate portion 12) the first flat plate portion 11 and the second flat plate portion 12 that are provided apart from each other and form the surface of the construction member 10A. The surface of the hardened body portion 13 is in contact with and opposed to the surface facing the inside of the first flat plate portion 11 and the second flat plate portion 12. As the fluid material for forming the hardened body portion 13, for example, concrete, mortar, fiber-reinforced concrete, etc. are used. In this embodiment, the hardened body portion 13 is formed of concrete.

[0018] In this embodiment, the light transmission part 14 is formed in a rod shape with a circular cross-section by a material having light transmissivity. A plurality of light transmission parts 14 are provided at intervals along the surfaces 11f and 12f. Each light transmission part 14 extends in the thickness direction of the construction member 10A. Both end parts in the extending direction of each light transmission part 14 are inserted into circular holes 11h and 12h formed in the first flat plate part 11 and the second flat plate part 12, respectively. The end faces 14a and 14b of each light transmission part 14 are provided so as to be exposed to the surfaces 11f and 12f facing the outside of the first flat plate part 11 and the second flat plate part 12, that is, the surfaces 11f and 12f of the construction member 10A formed by each of the first flat plate part 11 and the second flat plate part 12. Particularly in this embodiment, the end faces 14a and 14b are formed in a planar shape, and the length of each light transmission part 14 is adjusted so that the end faces 14a and 14b are located on the same plane as the surfaces 11f and 12f of the first flat plate part 11 and the second flat plate part 12, respectively. That is, the light transmission part 14 has a length corresponding to the thickness of the construction member 10A, and more specifically, a length that coincides with the thickness of the construction member 10A. The middle part in the extending direction of each light transmission part 14 is embedded in the cured body part 13. The outer diameter of each light transmission part 14 is formed so as to be substantially equal to or slightly smaller than the inner diameters of the holes 11h and 12h. As the material having light transmissivity for forming the light transmission part 14, for example, either a glass material or a resin material is used. As the resin material for forming the light transmission part 14, for example, it is preferable to use an acrylic resin having high light transmissivity. In particular, it is preferable to use polymethyl methacrylate resin (PMMA: light transmittance 92%) as the resin material for forming the light transmission part 14. As other resin materials for the light transmission part 14, transparent ceramics (light transmittance 84%), polycarbonate (light transmittance 93%), rigid vinyl chloride resin (light transmittance 87%), cellulose nanofiber (light transmittance 95%), polystyrene, etc. can be used. Further, as the glass material for forming the light transmission part 14, for example, quartz, glass (light transmittance 90%), etc. can also be used. In the present embodiment, each light transmission part 14 is provided so as to span between the first flat plate part 11 and the second flat plate part 12 when manufacturing the construction member 10A, as will be described later with reference to FIG. 7. Therefore, it has a certain rigidity so as not to bend at this time.

[0019] In such a construction member 10A, for example, when light is irradiated from the left side in FIG. 2, that is, from the side of the surface 11f, the light enters the light transmission part 14 from the end face 14a exposed on the surface 11f. The light that has entered the light transmission part 14 passes through the inside of the light transmission part 14 while repeatedly reflecting inside, and reaches the end face 14b on the side opposite to the end face 14a. The light is irradiated from the end face 14b to the space on the right side in FIG. 2 where the end face 14b is located, that is, the surface 12f side.

[0020] Next, a method for manufacturing the construction member 10A as described above will be explained. FIG. 3 is a diagram showing the flow of a method for manufacturing a light-transmissive construction member in FIG. 2. FIG. 4 is a cross-sectional view showing a state in which a concrete flat plate for forming the first flat plate part and the second flat plate part is manufactured in the flat plate part manufacturing step in the method for manufacturing a light-transmissive construction member in FIG. 3. As shown in FIG. 3, the method for manufacturing the light-transmissive construction member 10A includes a flat plate part manufacturing step S1, a hole forming step S2, a light transmission part arranging step S3, and a hardened body part forming step S4. In the flat plate part manufacturing process S1, for example, at a factory or a work yard installed at a construction site, as shown in FIG. 4, a concrete flat plate 50 that forms the first flat plate part 11 and the second flat plate part 12 is manufactured. When the first flat plate part 11 and the second flat plate part 12 are formed of any cement-based material such as cement paste, mortar, fiber-reinforced mortar, concrete, or fiber-reinforced concrete, in the flat plate part manufacturing process S1 in this embodiment, the concrete flat plate 50 that forms the first flat plate part 11 and the second flat plate part 12 is manufactured by horizontal casting. That is, the mold 100 for forming the concrete flat plate 50 is provided such that the widest surface of the concrete flat plate 50 to be formed thereby extends in the horizontal direction. By filling such a mold 100 with a cement-based material kneaded in a predetermined formulation, compacting it, and then curing it, the concrete flat plate 50 is formed. Due to the compaction of the concrete, the air bubbles contained in the cement-based material move upward, so air bubbles are less likely to gather on the lower surface 50b of the concrete flat plate 50 formed corresponding to the bottom surface 101 of the mold 100. Therefore, when manufacturing the concrete flat plate 50, by using the concrete flat plate 50 such that the surface formed as the lower surface 50b is the surfaces 11f and 12f facing the outside of the first flat plate part 11 and the second flat plate part 12, the surfaces 11f and 12f of the construction member 10A can be made into smooth surfaces with few air bubbles.

[0021] FIG. 5 is a cross-sectional view showing a state in which holes are formed in the first flat plate part and the second flat plate part in the hole forming process in the manufacturing method of the construction member having light transmissibility in FIG. 3. In the hole forming step S2, holes 11h and 12h into which both ends of the light transmitting portion 14 are inserted are formed in the concrete slab 50 that forms each of the first flat plate portion 11 and the second flat plate portion 12. For this, for example, the holes 11h and 12h may be individually formed for each of the first flat plate portion 11 and the second flat plate portion 12. However, as shown in FIG. 5, it is more preferable to form the holes 11h and 12h in a state where the first flat plate portion 11 and the second flat plate portion 12 are overlapped. The first flat plate portion 11 and the second flat plate portion 12 are overlapped so that the surfaces 11f and 12f, which are smoothly formed as the lower surface 50b of the concrete slab 50, face the outside (the side opposite to the side facing each other when the first flat plate portion 11 and the second flat plate portion 12 are overlapped). In this state, the first flat plate portion 11 and the second flat plate portion 12 are collectively penetrated by a drill or the like to form each of the plurality of holes 11h and 12h. Particularly in the present embodiment, after the holes 11h and 12h are collectively formed in each of the first flat plate portion 11 and the second flat plate portion 12 by a drill or the like so as to have an inner diameter substantially equal to the outer diameter of the light transmitting portion 14, the hole 12h of the second flat plate portion 12 is slightly enlarged to have an inner diameter larger than the inner diameter of the hole 11h of the first flat plate portion 11 and the outer diameter of the light transmitting portion 14.

[0022] FIG. 6 is a cross-sectional view showing a state where the light transmitting portion is inserted into the holes of the first flat plate portion and the second flat plate portion in the light transmitting portion arrangement step in the manufacturing method of the light transmissive construction member of FIG. 3. FIG. 7 is a cross-sectional view showing a state where the first flat plate portion and the second flat plate portion are slid along the light transmitting portion in the light transmitting portion arrangement step in the manufacturing method of the light transmissive construction member of FIG. 3. In the light transmission part arrangement step S3, the light transmission parts 14 are inserted and arranged in the holes 11h and 12h of the first flat part 11 and the second flat part 12 respectively. For this, for example, as shown in FIG. 6, the light transmission parts 14 having a length corresponding to the thickness of the construction member 10A, more specifically, a length equal to the thickness of the construction member 10A, are inserted into the holes 11h and 12h of the first flat part 11 and the second flat part 12 in the overlapped state. At this time, in this embodiment, for example, each light transmission part 14 has one end inserted into the hole 11h of the first flat part 11, and the end face 14a is positioned on the same plane as the surface 11f facing the outside and is exposed on the surface 11f, and the other end is inserted into the hole 12h of the second flat part 12 and protrudes from the surface 12f facing the outside. Next, as shown in FIG. 7, the second flat part 12 is slid in a direction away from the first flat part 11, and the first flat part 11 and the second flat part 12 are opposed to each other with a predetermined interval therebetween. In this state, the end face 14b of each light transmission part 14 is positioned on the same plane as the surface 12f of the second flat part 12 and is exposed on the surface 12f. As described above, since the light transmission part 14 has a length corresponding to the thickness of the wall 2 (construction member 10A), if the second flat part 12 is slid as described above so that the surface 12f of the second flat part 12 and the end face 14b of the light transmission part 14 are positioned on the same plane, the distance between the surface 11f facing the outside of the first flat part 11 and the surface 12f facing the outside of the second flat part 12 is equal to the thickness of the wall 2 (construction member 10A). Here, as described above, the hole 12h of the second flat part 12 is formed to have an inner diameter slightly larger than the outer diameter of the light transmission part 14. For this reason, the contact between the inner peripheral surface of the hole 12h and the surface of the light transmission part 14 when the second flat part 12 is slid is suppressed, and it is easy to relatively move the second flat part 12 with respect to the light transmission part 14. Also, as described above, since the hole 11h in the first flat plate portion 11 is formed to have an inner diameter substantially equal to the outer diameter of the light transmissive portion 14, the light transmissive portion 14 is difficult to pass through the hole 11h. Therefore, when the second flat plate portion 12 is slid, even if the surface of the light transmissive portion 14 comes into contact with the inner peripheral surface of the hole 12h and the light transmissive portion 14 tries to move together with the second flat plate portion 12 so as to be dragged by the second flat plate portion 12, this movement is suppressed. After sliding the second flat plate portion 12, it is desirable to close the gap between the inner peripheral surface of the hole 12h and the end portion of the light transmissive portion 14 on the end face 14b side with mortar, putty, caulking material, adhesive tape, etc. having the same color as the second flat plate portion 12.

[0023] FIG. 8 is a cross-sectional view showing a state in which a fluid material is poured into the first flat plate portion and the second flat plate portion to form a cured body portion in the cured body portion forming step in the method for manufacturing a light-transmissive construction member of FIG. 3. In the cured body portion forming step S4, concrete as a fluid material is poured inside the first flat plate portion 11 and the second flat plate portion 12 and cured to form a cured body portion 13. In the present embodiment, as shown in FIG. 8, the first flat plate portion 11 and the second flat plate portion 12 are set upright, and the first flat plate portion 11 and the second flat plate portion 12 are opposed to each other with a space therebetween in the horizontal direction. The first flat plate portion 11 and the second flat plate portion 12 are supported by appropriate support members 120. The gaps between both side portions and the lower portion of the first flat plate portion 11 in the depth direction of the drawing sheet and both side portions and the lower portion of the second flat plate portion are blocked by a formwork material (not shown). The fluid material is filled inside the space surrounded by the first flat plate portion 11, the second flat plate portion 12, and the formwork material (not shown) so as to embed the light transmissive portion 14, and then compacted by an appropriate vibrator or the like. After curing for a predetermined time and the fluid material is cured to form the cured body portion 13, the formwork material is removed. In this way, the construction member 10A constituting the wall 2 is formed.

[0024] Here, when forming the cured body portion 13, during the process of the concrete, which is a fluid material for forming the cured body portion 13, curing, the water contained in the concrete may seep out along the interface between the concrete and the light transmission portion 14 embedded therein, toward the first flat plate portion 11 side and the second flat plate portion 12 side. Then, on the surface of the cured body portion 13, the periphery of the light transmission portion 14 may have a different color tone from other portions. However, since this cured body portion 13 is covered by the first flat plate portion 11 and the second flat plate portion 12, in the cured body portion 13, the portions with different color tones generated around the light transmission portion 14 will not be exposed on the surfaces 11f, 12f of the construction member 10A. Also, air bubbles or the like that appear at the boundary portion between the first flat plate portion 11 and the second flat plate portion 12 during the process of the cured body portion 13 curing will not be exposed on the surfaces 11f, 12f of the construction member 10A.

[0025] Next, the effects of the above-described construction member 10A having light transmissivity will be described. The construction member 10A having light transmissivity as described above is a construction member 10A having light transmissivity, and includes a first flat plate portion 11 and a second flat plate portion 12 provided so as to form surfaces 11f, 12f respectively, a cured body portion 13 formed by curing a fluid material inside the first flat plate portion 11 and the second flat plate portion 12, and a light transmission portion 14 embedded in the cured body portion 13 and provided such that end faces 14a, 14b are exposed on the surfaces 11f, 12f formed by the first flat plate portion 11 and the second flat plate portion 12 respectively. According to such a configuration, the cured body portion 13 formed by curing the fluid material is formed inside the first flat plate portion 11 and the second flat plate portion 12, and the surfaces 11f, 12f of the construction member 10A are formed by the first flat plate portion 11 and the second flat plate portion 12 respectively. That is, in the portions where the first flat plate portion 11 and the second flat plate portion 12 are provided, the cured body portion 13 is not exposed on the surface of the construction member 10A and does not become the surfaces 11f, 12f of the construction member 10A. Therefore, even if air bubbles are mixed in when forming the cured body portion 13, or if a change in color tone or the like occurs in the cured body portion 13, these can be suppressed from being exposed on the surfaces 11f, 12f of the construction member 10A. In addition, since the first flat plate portion 11 and the second flat plate portion 12 that form the surfaces 11f and 12f of the construction member 10A are manufactured as members separate from the cured body portion 13, when manufacturing the construction member 10A itself, operations such as cutting and flattening of the surfaces 11f and 12f are not required. Furthermore, the end faces 14a and 14b of the light transmission portion 14 are provided so as to be exposed on the surfaces 11f and 12f of the construction member 10A formed by the first flat plate portion 11 and the second flat plate portion 12. Since the surfaces 11f and 12f of this construction member 10A are separated from the surface of the cured body portion 13 by the thicknesses of the first flat plate portion 11 and the second flat plate portion 12, the end faces 14a and 14b of the light transmission portion 14 exposed on the surfaces 11f and 12f of the construction member 10A are provided separated from the cured body portion 13. For this reason, when forming the cured body portion 13, it is possible to prevent the fluid material from soiling the end faces 14a and 14b of the light transmission portion 14, and the labor for repair and the like can be reduced. As described above, by providing the first flat plate portion 11 and the second flat plate portion 12, the aesthetic appearance of the construction member 10A is maintained, so that labor for adjusting the aesthetic appearance is not required during manufacturing. In addition, since the cured body portion 13 can be formed using the first flat plate portion 11 and the second flat plate portion 12 as an embedded formwork, it is not necessary to remove the formwork. As a result, it becomes possible to provide a light-transmissive construction member 10A that is easy to manufacture while having surfaces 11f and 12f with an aesthetic appearance.

[0026] In addition, the first flat plate portion 11 and the second flat plate portion 12 are formed of any one of cement paste, mortar, fiber-reinforced mortar, concrete, fiber-reinforced concrete, steel plate, and wood plate. According to such a configuration, when the first flat plate portion 11 and the second flat plate portion 12 are formed of cement paste, mortar, fiber-reinforced mortar, concrete, or fiber-reinforced concrete, the first flat plate portion 11 and the second flat plate portion 12 having a predetermined shape can be prepared in advance with cement paste, mortar, fiber-reinforced mortar, concrete, or fiber-reinforced concrete. In this case, the surfaces 11f and 12f (appearance) of the construction member 10A can be formed of a concrete-based material. Further, if fiber-reinforced mortar or fiber-reinforced concrete is used, the strength of the first flat plate portion 11 and the second flat plate portion 12 can be increased. Also, when the first flat plate portion 11 and the second flat plate portion 12 are formed of steel plates or wooden boards, the appearance of the construction member 10A can be formed of a steel material or a wood-based material.

[0027] Further, the light transmission portion 14 is formed in a rod shape with a circular cross section by a light-transmissive material such as a glass material or a resin material. According to such a configuration, by forming the light transmission portion 14 with a light-transmissive material such as a glass material or a resin material formed in a rod shape with a circular cross section, the light transmission portion 14 can be made to have a certain strength. By using such a light transmission portion 14, when manufacturing the construction member 10A, operations such as positioning the light transmission portion 14, providing the end faces 14a and 14b so as to be exposed on the respective surfaces 11f and 12f of the first flat plate portion 11 and the second flat plate portion 12, and curing a fluid material to form the cured body portion 13 can be easily performed.

[0028] In particular, by making the light transmission portion 14 have a certain strength (rigidity) and inserting and supporting such a light transmission portion 14 into the holes 11h and 12h formed in the first flat plate portion 11 and the second flat plate portion 12, the position of the light transmission portion 14 can be ensured with high precision, and the construction member 10A can be easily realized with the design property as designed.

[0029] Also, the cured body portion 13 is formed of concrete. According to such a configuration, when forming the cured body portion 13, it is only necessary to pour and cure concrete as a fluid material inside the first flat plate portion 11 and the second flat plate portion 12, and the construction member 10A can be easily manufactured.

[0030] The manufacturing method of the construction member 10A having light transmissivity as described above is a manufacturing method of the construction member 10A having light transmissivity. The first flat plate portion 11 and the second flat plate portion 12 are fabricated, holes 11h and 12h are formed in each of the first flat plate portion 11 and the second flat plate portion 12, and the light transmissive portions 14 are inserted into the holes 11h and 12h of the first flat plate portion 11 and the second flat plate portion 12 respectively so that the end faces 14a and 14b are exposed on the respective surfaces 11f and 12f of the first flat plate portion 11 and the second flat plate portion 12. A fluid material is poured inside the first flat plate portion 11 and the second flat plate portion 12 and cured to form a cured body portion 13 so as to embed the light transmissive portions 14. According to such a configuration, after inserting the light transmissive portions 14 into the holes 11h and 12h formed in the previously fabricated first flat plate portion 11 and second flat plate portion 12 so that the end faces 14a and 14b are exposed on the surfaces 11f and 12f of the first flat plate portion 11 and the second flat plate portion 12, a fluid material is poured inside the first flat plate portion 11 and the second flat plate portion 12 and cured, whereby it is possible to manufacture the construction member 10A having light transmissivity that is easy to manufacture while having surfaces 11f and 12f with an aesthetic appearance. That is, it becomes possible to provide a manufacturing method of the construction member 10A having light transmissivity that is easy to manufacture while having surfaces 11f and 12f with an aesthetic appearance.

[0031] Further, the first flat plate portion 11 and the second flat plate portion 12 are fabricated by horizontal casting using any one of cement paste, mortar, fiber-reinforced mortar, concrete, and fiber-reinforced concrete. The first flat plate portion 11 and the second flat plate portion 12 are erected so that the respective surfaces 11f and 12f formed as the lower surfaces 50b during fabrication face outward, and a cured body portion 13 is formed inside the first flat plate portion 11 and the second flat plate portion 12. According to such a configuration, when the first flat plate portion 11 and the second flat plate portion 12 are formed of cement paste, mortar, fiber-reinforced mortar, concrete, or fiber-reinforced concrete, by producing the first flat plate portion 11 and the second flat plate portion 12 by horizontal casting, the surfaces 11f and 12f of the first flat plate portion 11 and the second flat plate portion 12 formed as the lower surface 50b of the concrete flat plate 50 during production are less likely to have residual bubbles and can be smooth surfaces. By arranging the smoothly formed lower surface 50b so as to face the outside and form the surface of the construction member 10A, it is possible to suppress the impairment of the aesthetics of the surfaces 11f and 12f of the construction member 10A.

[0032] Further, in the present embodiment, the light transmission portion 14 inserted into the holes 11h and 12h of the first flat plate portion 11 and the second flat plate portion 12 is formed to have a length that matches the thickness of the construction member 10A. According to such a configuration, when the first flat plate portion 11 and the second flat plate portion 12 are provided so that the distance between the surface 11f facing the outside of the first flat plate portion 11 and the surface 12f facing the outside of the second flat plate portion 12 matches the thickness of the construction member 10A, the end faces 14a and 14b of the light transmission portion 14 can be in a state of being aligned and located on the same plane as the surfaces 11f and 12f of the first flat plate portion 11 and the second flat plate portion 12. Thereby, since the end faces 14a and 14b of the light transmission portion 14 are suppressed from protruding from the surfaces 11f and 12f of the first flat plate portion 11 and the second flat plate portion 12, no labor such as cutting of the protruding portion of the light transmission portion 14 is required.

[0033] Further, in the present embodiment, the light transmission portion 14 is formed in a rod shape with a circular cross section as described above. Accordingly, the holes 11h and 12h of each of the first flat plate portion 11 and the second flat plate portion 12 are formed in a circular shape. According to such a configuration, when opening the holes 11h and 12h in the first flat plate portion 11 and the second flat plate portion 12, it becomes possible to use a drill depending on the material, so the work is easy.

[0034] Further, the hole 11h of the first flat plate portion 11 is formed to have the same size as the cross-sectional shape of the light transmission portion 14, the hole 12h of the second flat plate portion 12 is formed to be larger than the cross-sectional shape of the light transmission portion 14, and in a state where the first flat plate portion 11 and the second flat plate portion 12 are overlapped, the light transmission portion 14 is inserted through the holes 11h and 12h of the first flat plate portion 11 and the second flat plate portion 12 respectively, and one end face 14a of the light transmission portion 14 is positioned on the same plane as the surface 11f facing the outside of the first flat plate portion 11 and is exposed on the surface 11f. Then, the second flat plate portion 12 is slid so as to be separated from the first flat plate portion 11, and the other end face 14b of the light transmission portion 14 is positioned on the same plane as the surface 12f facing the outside of the second flat plate portion 12 and is exposed on the surface 12f. According to such a configuration, since the hole 11h of the first flat plate portion 11 is formed to have the same size as the cross-sectional shape of the light transmission portion 14, when the second flat plate portion 12 is slid so as to be separated from the first flat plate portion 11, the light transmission portion 14 is difficult to come off from the first flat plate portion 11. Further, since the hole 12h of the second flat plate portion 12 is formed to be larger than the cross-sectional shape of the light transmission portion 14, contact between the inner peripheral surface of the hole 12h and the surface of the light transmission portion 14 when the second flat plate portion 12 is slid is suppressed, and the second flat plate portion 12 can be easily relatively moved with respect to the light transmission portion 14.

[0035] Generally, construction members can also be manufactured by, for example, manufacturing a plurality of small members and stacking them. However, in such a case, the structure may become less robust and may not have sufficient earthquake resistance. On the other hand, in the manufacturing method of the construction member 10A as described above, it is possible to integrally manufacture a relatively large member such as the wall 2, for example. Therefore, compared with the case of stacking members, for example, a robust structure with excellent earthquake resistance can be realized.

[0036] (Modification of the embodiment) Note that the light-transmissive construction member of the present invention is not limited to the above-described embodiment described with reference to the drawings, and various modifications can be considered within its technical scope. For example, in the above embodiment, the entire surface of the wall 2 is formed by the construction member 10A. However, it is also possible to form a part of the wall 2 by the construction member 10A as described above, and make the remaining part of the wall 2 a normal wall structure without light transmissibility. In this case, by the manufacturing method of the construction member 10A as described above, a light transmissive part is constructed, and a formwork is provided on the remaining part of the wall 2 so as to be flush with the first flat plate part 11 and the second flat plate part 12, and concrete or the like is placed between the formworks, whereby the entire wall 2 can be constructed.

[0037] Further, in the above embodiment, the cured body part 13 is formed of concrete. However, as shown in FIG. 9, in the light transmissive construction member 10B, the cured body part 13 may be provided with reinforcing bars 19. In this case, the reinforcing bars 19 need to be arranged so as not to interfere with the light transmissive part 14. On the other hand, since both ends of the light transmissive part 14 are inserted into the holes 11h, 12h of the first flat plate part 11 and the second flat plate part 12, it is not necessary to fix the light transmissive part 14 to the reinforcing bars 19 for fixing the position of the light transmissive part 14. For this reason, the degrees of freedom in the layout of the light transmissive part 14 and the reinforcing bars 19 are increased respectively, and the designability of the construction member 10B can be improved. In addition, when providing the reinforcing bars 19, in order to manufacture the construction member 10B, with the first flat plate part 11 and the second flat plate part 12 arranged to face each other at a predetermined interval, after arranging the reinforcing bars 19 inside thereof, the light transmissive part 14 may be inserted into the holes 11h, 12h of the first flat plate part 11 and the second flat plate part 12 to form the cured body part 13.

[0038] Further, in the above embodiment, the end faces 14a, 14b of the light transmissive part 14 are exposed on the surfaces 11f, 12f. However, the end faces 14a, 14b do not have to be located in the same plane as the surfaces 11f, 12f. For example, as shown in FIG. 10, in the light transmissive construction member 10C, the end faces 14a, 14b may be formed in a curved surface shape and protrude from the surfaces 11f, 12f. Thereby, the designability of the construction member 10C can be enhanced.

[0039] The light-transmissive building member 10A as described above can be used not only as the wall 2 but also as a member forming other parts of the building 1. For example, as shown in FIG. 11, the light-transmissive building member 10D may be formed as the column 3 of the building 1. Similar to the above-described building member 10A, the building member 10D includes a first flat plate portion 11 and a second flat plate portion 12 on two side surfaces facing opposite sides of each other in the column 3, with the end faces of the light-transmissive portions 14 exposed. Also, as shown in FIGS. 12 and 13, the light-transmissive building member 10E forming the column 3 of the building 1 may include a first flat plate portion 11 and a second flat plate portion 12 arranged on two side surfaces facing opposite sides of each other among the four side surfaces of the column 3, and a third flat plate portion 16 and a fourth flat plate portion 17 arranged on the remaining two side surfaces. This building member 10E includes a cured body portion 13E formed inside each of the first flat plate portion 11 and the second flat plate portion 12 and the third flat plate portion 16 and the fourth flat plate portion 17. Further, the building member 10E includes a light-transmissive portion 14 provided such that the end faces 14a and 14b are exposed on the surfaces 11f and 12f facing the outside of the first flat plate portion 11 and the second flat plate portion 12 respectively, and a light-transmissive portion 18 provided such that the end faces 18a and 18b are exposed on the surfaces 16f and 17f facing the outside of the third flat plate portion 16 and the fourth flat plate portion 17 respectively. The light-transmissive portion 14 and the light-transmissive portion 18 are arranged with different vertical positions so as not to interfere with each other.

[0040] Also, as shown in FIGS. 14 and 15, in the light-transmissive construction member 10F that forms the column 3 of the building 1, the first flat plate portion 21 and the second flat plate portion 22 may be arranged on two adjacent sides among the four side surfaces of the column 3 so that their sides are in contact with each other orthogonally. That is, the first flat plate portion 21 and the second flat plate portion 22 are provided so as to have an L-shape when viewed in cross-section in the horizontal direction. The first flat plate portion 21 and the second flat plate portion 22 are provided so as to be separated from each other at portions other than the sides that come into contact with each other when viewed in cross-section. In this way, a cured body portion 13F is provided inside the portions where the first flat plate portion 21 and the second flat plate portion 22 are separated from each other, that is, between the surfaces facing the inside of each of the first flat plate portion 21 and the second flat plate portion 22. The construction member 10F further includes a third flat plate portion 26 and a fourth flat plate portion 27 that are arranged orthogonally to each other on the remaining two adjacent sides. The cured body portion 13F is also formed inside the portions where the third flat plate portion 26 and the fourth flat plate portion 27 are separated from each other, that is, between the surfaces facing the inside of each of the third flat plate portion 26 and the fourth flat plate portion 27. The construction member 10F also includes a light-transmissive portion 24 provided such that end faces 24a and 24b are exposed on surfaces 21f and 22f facing the outside of the first flat plate portion 21 and the second flat plate portion 22 respectively, and a light-transmissive portion 28 provided such that end faces 28a and 28b are exposed on surfaces 26f and 27f facing the outside of the third flat plate portion 26 and the fourth flat plate portion 27 respectively. When the column 3 formed by such a construction member 10F is arranged, for example, at the corner 200c of the passage 200, it is possible to see the situation on the other side of the column 3 across the corner 200c through the light-transmissive portion 24. Therefore, it is possible to prevent pedestrians traveling in the passage 200 from colliding with each other when they meet at the corner 200c while moving in directions orthogonal to each other. In addition, when the construction member 10F is provided at the corner 200C of the passage 200 in this way, the light-transmissive portion 28 corresponding to the third flat plate portion 26 and the fourth flat plate portion 27 that are not visible from the passage 200 may not be provided.

[0041] In addition, in the above-described embodiments and modifications, the light-transmitting portions 14, 18, 24, and 28 are formed as rod-shaped members having a circular cross-section, but the present invention is not limited thereto. For example, as shown in FIG. 16, the construction member 10G having light-transmittance may have a light-transmitting portion 38 formed as a rod-shaped member having a rectangular cross-section.

[0042] For example, as shown in FIG. 17, the construction member 10H having light-transmittance may be configured to form a beam 4 provided inside the building 1. Similar to the construction member 10A, the construction member 10H includes a first flat plate portion 31 and a second flat plate portion 32 in which end faces 34a and 34b of the light-transmitting portion 34 are exposed on two side faces facing opposite sides in the beam 4. Further, as shown in FIG. 18, the construction member 10I having light-transmittance may be configured to form a beam 4G located on the outer peripheral portion of the building 1. The construction member 10I includes a first flat plate portion 31 and a second flat plate portion 32 in which end faces 34a and 34b of the light-transmitting portion 34 are exposed on a side face facing the inside of the building 1 and a side face exposed to the outside of the building 1 in the beam 4G. In such a construction member 10I, outside light can be introduced from the outside to the inside of the building 1 through the light-transmitting portion 34. Also, as shown in FIG. 19, the construction member 10J having light-transmittance that forms the beam 4 of the building 1 may include a first flat plate portion 31 and a second flat plate portion 32 arranged along two side faces facing opposite sides in the beam 4, and a third flat plate portion 33 arranged on the lower surface 4b of the beam 4. The construction member 10J includes a light-transmitting portion 34 provided such that end faces 34a and 34b are exposed on surfaces 31f and 32f facing the outside of the first flat plate portion 31 and the second flat plate portion 32, respectively, a light-transmitting portion 35 provided such that end faces 35a and 35b are exposed on surfaces 33f and 31f facing the outside of the third flat plate portion 33 and the first flat plate portion 31 adjacent to each other, respectively, and a light-transmitting portion 36 provided such that end faces 36a and 36b are exposed on surfaces 33f and 32f facing the outside of the third flat plate portion 33 and the second flat plate portion 32 adjacent to each other, respectively.

[0043] In addition, as shown in FIG. 20, the construction member 10K having light-transmittance as described above can also be used for civil engineering structures other than the building 1, such as the pier 9 of a bridge 8. In addition, as long as it does not deviate from the gist of the present invention, it is possible to select the configurations listed in the above embodiments or to appropriately change them to other configurations.

Explanation of Reference Numerals

[0044] 10A to 10K Construction members 12, 22, 32 Second flat portions 11, 21, 31 First flat portions 13, 13E, 13F Hardened body portions 11h, 12h Holes 14, 18, 24, 28, 34, 35, 36, 38 Light transmission portions 11f, 12f, 21f, 22f, 31f, 32f Surfaces 14a, 14b, 18a, 18b, 24a, 24b, 28a, 28b, 34a, 34b, 35a, 35b, 36a, 36b End faces

Claims

1. A construction member having light transmissibility, comprising: a first flat plate portion and a second flat plate portion, each provided so as to form a surface; a cured body portion formed by curing a fluid material, inside the first flat plate portion and the second flat plate portion; a light transmissive portion formed in a rod shape, embedded in the cured body portion, and provided such that an end face thereof is exposed on the surface formed by each of the first flat plate portion and the second flat plate portion; wherein both end portions of the light transmissive portion are inserted into holes formed in the first flat plate portion and the second flat plate portion, respectively; the hole in the first flat plate portion is formed to have a size equivalent to the cross-sectional shape of the light transmissive portion, and the hole in the second flat plate portion is formed to be larger than the cross-sectional shape of the light transmissive portion, and the construction member having light transmissibility is characterized by this.

2. The construction member having light transmissibility according to claim 1, wherein the first flat plate portion and the second flat plate portion are formed of any one of cement paste, mortar, fiber-reinforced mortar, concrete, fiber-reinforced concrete, steel plate, and wood plate.

3. The construction member having light transmissibility according to claim 1 or 2, wherein the light transmissive portion is formed in a rod shape with a circular cross-section by a material having light transmissibility, such as a glass material or a resin material.

4. The construction member having light transmissibility according to any one of claims 1 to 3, wherein the cured body portion is formed of concrete.

5. A method for manufacturing a construction member having light transmissibility, comprising: producing a first flat plate portion and a second flat plate portion; while the first flat plate portion and the second flat plate portion are stacked, making holes in each of the first flat plate portion and the second flat plate portion such that the hole in the first flat plate portion has a size equivalent to the cross-sectional shape of a rod-shaped light transmissive portion, and the hole in the second flat plate portion is larger than the cross-sectional shape of the light transmissive portion; while the first flat plate portion and the second flat plate portion are stacked, inserting the light transmissive portion into each of the holes in the first flat plate portion and the second flat plate portion, exposing one end face of the light transmissive portion on the surface facing the outside of the first flat plate portion, and sliding the second flat plate portion away from the first flat plate portion to expose the other end face of the light transmissive portion on the surface facing the outside of the second flat plate portion, thereby inserting both end portions of the light transmissive portion into each of the holes in the first flat plate portion and the second flat plate portion. Flow a fluid material inside the first flat plate portion and the second flat plate portion and cure it to form a cured body portion so as to embed the light transmission portion. A method for manufacturing a light-transmissive construction member, characterized by the above.

6. The first flat plate portion and the second flat plate portion are produced by horizontal casting using any one of cement paste, mortar, fiber-reinforced mortar, concrete, and fiber-reinforced concrete. The first flat plate portion and the second flat plate portion are erected so that each of the surfaces formed as the lower surfaces during production of the first flat plate portion and the second flat plate portion faces outward, and the cured body portion is formed inside the first flat plate portion and the second flat plate portion. A method for manufacturing a light-transmissive construction member according to claim 5, characterized by the above.

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