Indoor corner material and connecting structure for indoor corner material

Abstract

To provide a corner material, and a connecting structure between the corner material and a wall, with the effects of suppressing the flow of air between the indoor side and the back side of the wall, enhancing airtightness, and maintaining a high level of cleanliness.SOLUTION: Provided is a long corner material 1 used as a cove molding for the interior walls of a building, for inside and outside corners formed by the walls, and for the portions where the ceiling and the wall meet. The corner material is formed in an L-shaped cross section with a base and side pieces attached to both ends or one end of the base for fixing to a base material of the building such as a pillar, and at the boundary between the base and the side pieces, a finishing material boundary surface 1b is formed which is set to the same width as the thickness of the ceiling finishing material or wall finishing material used, so that the surface of a curved portion 1zr provided on the interior side of the base and the surface of the ceiling finishing material or wall finishing material are flat and step-free.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a corner material and a connecting structure using the corner material. [Background technology]

[0002] Businesses that handle food, etc. must implement various measures to prevent the occurrence of food hygiene hazards. In addition to food factories, there are other facilities that require high standards of cleanliness inside buildings, such as medical institutions and precision machinery manufacturing plants. The water used for cleaning the interior of buildings is an obstacle to achieving such high standards of cleanliness. When metal corner members are used, it can cause corrosion, and when the corner members have a structure with a space behind them, it can cause mold to grow due to condensation.

[0003] Conventionally, various corner materials, such as resin or metal, have been used for interior corners and exterior corners formed between interior walls, and plastering finishes have been adopted. However, there were issues with resin corner materials, such as fire resistance, metal corner materials being prone to condensation, and plastering finishing being dependent on the skill of the craftsman, which lengthened the construction period. For example, Patent Document 1 describes an idea that is effective in preventing the adhesion of fine dust and improving ease of cleaning by using corner members and moldings with curved surfaces made of synthetic resin around the ceiling and corners. However, while synthetic resin corner materials are easy to process, they have the problem that they are not fireproof and cannot be used in buildings with semi-fireproof structures. In addition, the shape of the corner material as in Patent Document 1 creates a space on the back side (see Figure 4 in the document). In other words, if there is space behind the corner material, mold will grow due to condensation caused by the temperature difference with the room, and fine dust that exists in the space behind the corner material will flow into the room with air currents caused by opening and closing doors, making it impossible to achieve the high level of cleanliness that is required.

[0004] In view of this, Patent Document 2 discloses a base material for interior wallpaper that is made of non-combustible materials including cement, siliceous powder, aggregate, and fiber and is used for exterior and interior corners of a room. This base material can be used in semi-fireproof buildings, and by making the base material solid rather than hollow, it is possible to suppress condensation and fine dust, thereby achieving the high level of cleanliness that is required. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Publication number 03-004676 [Patent Document 2] JP 2015-155646 A Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, the contents disclosed in the above-mentioned prior art documents have been effective in improving cleaning performance, preventing condensation, and suppressing fine dust, but when a higher level of cleanliness is required, attention must be paid to the air flow within the facility. Even if the room is kept clean, fine dust and mold on the back side of the wall can flow into the room due to air currents, causing a problem of reducing the cleanliness of the room. Therefore, the objective of the present invention is to provide a connection structure between a corner material and a wall, which has the effect of suppressing the flow of air between the inside of the room and the back side of the wall, thereby increasing airtightness and maintaining a high level of cleanliness. [Means for solving the problem]

[0007] The corner material of the present invention is a long corner material used as a molding for inside and outside corners formed by the walls of a building interior, and for parts where a ceiling and a wall meet, and is characterized in that it is formed with an L-shaped cross section consisting of a base and a side piece provided at both ends or one end of the base for fixing to a base material of the building such as a pillar, and at the boundary between the base and the side piece, a finishing material boundary surface is formed which is set to the same width as the thickness of the ceiling finishing material or wall finishing material used, so that the surface of the curved portion of the base on the interior side and the surface of the ceiling finishing material or wall finishing material are flat and step-free.

[0008] The main components of the material are cement, silicate powder, aggregate, and fiber, and the material is extruded into a solid form as a non-combustible material, with the curved surface of the base being exposed to the interior of the room when used.

[0009] In addition, the side pieces of the corner material of the present invention are characterized in that they have side end faces that are set to the same thickness as the ceiling base board or wall base board so that they can be butted against the ends of the ceiling base board or wall base board, and screw grooves that position the screws to be fixed to the base material of a building such as a pillar and accommodate the heads of the screws, and the distance between the plane formed by the side end faces and the plane formed by the boundary surface of the finishing material (the length of the side piece) is set greater than the width of the side end faces (the thickness of the side piece).

[0010] Furthermore, the corner material of the present invention is characterized in that the screw grooves provided on the side pieces do not have holes for passing screws through.

[0011] Next, the connecting structure of the corner material of the present invention is characterized in that the above-mentioned corner material having a side end face and a finishing material boundary surface is used, so that the side end face and the ceiling base board or wall base board are butted together, and the surface of the curved portion that is exposed to the inside of the room when in use and the surface of the ceiling finishing material or wall finishing material are fitted flatly without any steps.

[0012] The method is also characterized in that the ceiling base board or wall base board is connected to the ceiling finishing material or wall finishing material so that the plane formed by the side end faces and the plane formed by the finishing boundary surface are not coplanar. Effect of the Invention

[0013] According to the present invention, it is possible to provide a connecting structure between corner materials which has the effect of suppressing air flow between the inside of the room and the back side of the wall, thereby increasing airtightness and maintaining a high level of cleanliness. Furthermore, by exposing a part of the water-absorbent corner material of the present invention to the indoor side, the water and moisture absorption effect inside the room is improved. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a plan view showing a corner material according to a first embodiment of the present invention. [Diagram 2] FIG. 2 is a perspective view showing the corner material of the embodiment. [Diagram 3] 4 is a schematic diagram showing a state in which the corner material of the above embodiment is used. FIG. [Figure 4] 5A to 5C are schematic diagrams showing a procedure for attaching the corner material of the above embodiment. [Diagram 5] 5A to 5C are schematic diagrams showing a procedure for attaching the corner material of the above embodiment. [Figure 6] 5A to 5C are schematic diagrams showing a procedure for attaching the corner material of the above embodiment. [Figure 7] A diagram showing the state in which an adhesive is used on the boundary surface of the finishing material of the corner material in the above embodiment. [Figure 8] FIG. 4 is a diagram showing the length and thickness of the side pieces of the corner material of the above embodiment. [Figure 9] FIG. 13 is a diagram showing a comparative example of a corner material having a different shape from the above embodiment. [Figure 10] 10A and 10B are comparative diagrams of corner materials having different configurations from the corner material of the above embodiment. [Figure 11] 11A and 11B are diagrams showing another form of the corner material of the above embodiment. [Figure 12] 1 is a diagram illustrating a corner material having a different form from the corner material of the above embodiment. FIG. [Figure 13] FIG. 11 is a plan view showing a corner material according to a second embodiment of the present invention. [Figure 14] FIG. 2 is a perspective view showing the corner material of the embodiment. [Figure 15] 4 is a schematic diagram showing a state in which the corner material of the above embodiment is used. FIG. [Figure 16] FIG. 4 is a diagram showing the length and thickness of the side pieces of the corner material of the above embodiment. [Figure 17] 11A and 11B are diagrams showing another form of the corner material of the above embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] (First embodiment) FIG. 1 is a plan view of a corner material 1 used for an inside corner in this embodiment, FIG. 2 is a perspective view, and FIG. 3 is a schematic diagram showing the corner material in use.

[0016] (About corner materials) The indoor corner material 1 in this embodiment is a corner material used as molding in the corners where walls constituting a room such as a food factory, clean room, or medical institution intersect, or where a ceiling intersects with a wall. The material contains cement, siliceous powder, aggregate, and fiber as its main components and is formed as a non-combustible material. First, the manufacturing process and material will be described in detail.

[0017] (Method of manufacturing corner materials) The manufacturing process involves mixing the above ingredients in an appropriate ratio (mixing process), adding an appropriate amount of water and kneading (kneading process). The kneaded mixture is fed to an extrusion molding machine and extruded to obtain an extrusion molded body, which is the corner material 1 (extrusion molding process). The extrusion molded body, which is the corner material 1, is then cured and dried (curing and drying process) to complete the process. The corner material 1 may be molded as a single unit by extrusion molding, or each section may be molded separately and then joined together, but by making it a solid structure rather than a hollow structure, the accumulation of fine dust and the occurrence of condensation due to temperature differences are suppressed.

[0018] (About the material) Examples of cement include various types of Portland cement, such as ordinary, early strength, high heat, low heat, and sulfate resistant Portland cement, belite-rich cement, alumina cement, blast furnace cement, fly ash cement, and various mixed cements. The blending ratio of cement is in the range of 30 to 65 mass%, and preferably in the range of 35 to 55 mass%.

[0019] The siliceous powder is a component used to improve the waterproofing function of the corner material 1, and examples of such powder include silica stone, diatomaceous earth, microsilica, and silica fume, with silica stone being particularly preferred. The blending ratio of the siliceous powder is in the range of 20 to 41% by mass, and preferably in the range of 25 to 37% by mass. If the mixing ratio of the siliceous powder is less than 20% by mass, the waterproof effect cannot be obtained, and if the mixing ratio of the siliceous powder is more than 41% by mass, the strength of the corner material 1 decreases.

[0020] The aggregate is a component used to suppress heat generation and shrinkage during curing, and examples of the aggregate include sand, fly ash balloons, shirasu balloons, pearlite balloons, obsidian balloons, perlite, vermiculite, kanamite, and glass micro balloons. The aggregate mixing ratio is in the range of 8 to 31% by mass, and more preferably in the range of 12 to 26% by mass. If the aggregate mixing ratio is less than 8% by mass, appropriate heat generation and suppression effects cannot be obtained, and if the aggregate mixing ratio is more than 31% by mass, the strength of the corner material 1 decreases.

[0021] Fibers are components used to enhance the frost resistance of the corner material 1, such as preventing cracks and improving bending strength, and examples of such fibers include organic fibers such as pulp, waste paper, polyamide fibers, polyester fibers, polypropylene fibers, and vinylon fibers, and inorganic fibers such as glass fibers and carbon fibers, with pulp being particularly suitable. The fiber blending ratio is in the range of 2 to 11 mass%, and more preferably in the range of 2.5 to 8 mass%. If the fiber blending ratio is less than 2 mass%, appropriate effects such as preventing cracks and improving bending strength cannot be obtained, and if the fiber blending ratio is more than 11 mass%, the strength of the corner material 1 decreases.

[0022] The corner material obtained by mixing the above components in the above ratio is excellent in heat resistance, impact resistance, frost resistance, and water resistance, and is suitable as a non-combustible material. Specifically, the strength attenuation rate is 10% or less, and the thermal expansion coefficient is 1.0 to 15.0 × 10 -6 / ℃, impact strength is 0.8~25.0kJ / m 2 It is also preferable that the thermal conductivity is 0.3 W / mK or less and the water absorption is 40% or less. Furthermore, when the corner material is immersed in water and repeatedly frozen and thawed, it is preferable that the volume change rate be 10% or less, in terms of excellent water resistance and frost damage resistance.

[0023] (Characteristics of corner materials) Next, assuming a situation in which the indoor corner member 1 of this embodiment is used in an inside corner, a description will be given below with reference to the drawings. (1) In a state of use, the wall has a base 1z with 1zr exposed to the interior of the room, a wall base board B made of gypsum board or the like, and a side piece 1e with a side end surface 1ef whose tip is in a butted state (see FIG. 1(b)). (2) It is formed long from the ceiling to the floor (see Figure 2). (3) A screw groove 1ha provided in the longitudinal direction of the side piece 1e for positioning the screw S for fastening the corner material 1 to the base material X of the building such as a pillar, (4) A back groove 1hb provided at a position corresponding to the screw groove 1ha on the side (back side) of the corner material 1 that contacts the base material X of the building; (5) As shown in FIG. 3, when only the curved portion 1zr of the corner material 1 is exposed and a wall finishing material (decorative panel) S is arranged, the surface of the curved portion 1zr and the surface of the wall finishing material are made flat without any steps, and a finishing material boundary surface 1b is provided which is set to the same width as the thickness of the wall finishing material and is provided for positioning the wall finishing material.

[0024] By not making the corners between the wall surfaces a right angle and by exposing the curved portion 1zr of the corner material 1, advantages such as improved cleaning properties and smoother air flow within the room are obtained. As described above, the corner material 1 of this embodiment has water absorption and a low volume change rate, and since it is used with the curved surface 1zr exposed to the room, it can absorb water while maintaining a stable shape even in an environment where water is used, and it also has a moisture absorption effect that reduces indoor humidity. Even in an environment where a wall finishing material that prioritizes another effect must be used at the expense of water absorption and moisture absorption, the corner material 1 can be expected to have a water absorption and moisture absorption effect in the room. As mentioned above, from the standpoint of cleaning ease, it is desirable to avoid right angles between wall surfaces. However, on the other hand, if the exposed portion is flat, as shown in Figure 12, the surface area will be smaller than that of a curved surface, and the water absorption and moisture absorption properties will be lower than those of the corner material 1 of this embodiment, so it is effective for the exposed portion of corner material 1 to be curved.

[0025] Furthermore, the screw groove 1ha provided longitudinally near the side end portion 1e and serving to position the screw Y for fastening the corner material 1 to the base material X of a building, such as a pillar, does not have a screw hole that penetrates the corner material 1 in the front-to-back direction, so flames and heat do not penetrate into the base material through the hole, which is thought to contribute to improved fire resistance. On the other hand, construction efficiency can be improved by drilling pilot holes in advance so that the pilot holes penetrate from the screw hole groove 1ha of the corner material 1 to the back groove 1hb, and the like, and the method can be selected appropriately depending on the work situation. Here, since the head of the screw Y can be accommodated in the screw groove 1ha, the head of the screw Y does not become an obstacle to the installation of the wall finishing material S. Furthermore, by providing the back groove 1hb, a place for debris generated when the screw is fastened to the base material X of the building is secured.

[0026] (Inside corner connection structure using corner materials) Next, a connection structure for an interior corner using the corner material 1 according to this embodiment will be described. First, regarding the connection procedure, as shown in FIG. 4, the corner material 1 in this embodiment is attached to the base material X of the building and fixed with a screw Y using the screw groove 1ha. Although a light steel frame is shown as the base material X of the building to which the corner material 1 is fixed in FIGS. 4 to 6, it may include a wooden partition wall, an aluminum wall underlayment, or a beam, girder, ceiling underlayment, etc. when used as a molding. Here, it is assumed that an adhesive G may be applied or filled between the back side of the corner material 1 and the base material X of the building to improve waterproofing and airtightness, or an airtight sheet may be applied to the entire surface. Known adhesives, sealants, caulking agents, etc. may be used as the adhesive G, and known airtight sheets may be used as well, such as a single film made of a single plastic material, or a composite film made by combining a single film with films or plastics of different properties. Next, as shown in Fig. 5, the end of the wall base board B and the side end face 1ef of the corner material 1 are arranged so as to be in close contact with each other. The wall base board B is a flat rectangular plate with several thicknesses that are predefined, and the thickness of the side piece 1e of the corner material in this embodiment (width of the side end face 1ef) is also predefined to correspond to the thickness of the wall base board material B. For example, thicknesses such as 9.5mm to 12.5mm, 15mm, and 21mm are common. It is also desirable to apply an adhesive G to the contact surface between the side end face 1ef, which is the butt joint, and the wall base board B. Then, as shown in Fig. 6, the wall finishing material S is arranged so as to cover the wall base board B and the side piece 1e of the corner material 1. The wall finishing material S is a flat rectangular plate, and is often about 10 mm thick. By making the width of the finishing material boundary surface 1b of the corner material in this embodiment correspond to the thickness of the wall finishing material S, the surface of the curved portion 1zr of the base 1z and the surface of the wall finishing material S become flat without any steps, and the finishing material boundary surface 1b plays a role in positioning when the wall finishing material S is attached. Here, an adhesive G is applied to the finishing material boundary surface 1b as well as to the areas where the wall finishing material S, the corner material 1, and the wall base board B come into contact with each other to improve waterproofing and airtightness.

[0027] In addition, as shown in Figure 7, it is also possible to consider applying an adhesive G such as a caulking agent between the boundary surface 1b of the corner material 1 and the wall finishing material S to further improve waterproofing and airtightness.

[0028] (Interlocking structure at inside corners to improve airtightness) Figure 8 is a plan view of the corner material 1 in this embodiment, and shows that the length L of the side piece 1e that constitutes the corner material 1 is defined as the distance between the plane P1 formed by the finishing material boundary surface 1b and the plane P2 formed by the side end surface 1ef, and the thickness W of the side piece 1e is defined as the width of the side end surface 1ef. It is important for improving the airtightness within the room that the plane P1 formed by the finishing material boundary surface 1b and the plane P2 formed by the side end surface 1ef are not on the same plane (L ≠ 0), and this will be explained in further detail as follows. In this embodiment, the relationship between the length L of the side piece 1e of the corner material 1 and the thickness W of the side piece 1e is preferably L>W. That is, the distance (length of the side piece 1e) L between the plane P1 formed by the finishing material boundary surface 1b and the plane P2 formed by the side end surface 1ef is set to be larger than the width (thickness of the side piece 1e) W of the side end surface 1ef, so that the air circulation between the room and the back side of the wall can be suppressed and the airtightness of the room can be improved, as shown in FIG. 10 in detail. The thicknesses of the wall base board B in (a) and (b) of FIG. 10 are the same (W=W'), and the thickness of the wall finishing material S is also the same (1b=1b'), so by setting the length L of the side piece 1e to be longer, the distance (W+L+1b) between the room and the back side of the wall becomes longer, which is effective in suppressing the air circulation.

[0029] As for the corner material of the present invention, as shown in FIG. 11, it is possible to imagine not only a corner material 1 having side pieces 1e on both sides of a base 1z, like the corner material 1 in the first embodiment, but also a corner material 2 having a side piece 1e on only one side of a base 1z.

[0030] (Second embodiment) As a second embodiment of the present invention, a corner material 3 used for an outside corner will be described below with reference to the drawings.

[0031] The corner material 3 of this embodiment is a corner material used at a protruding corner where wall surfaces meet. Figure 13 is a plan view of the corner material 3, Figure 14 is an oblique view, and Figure 15 is a schematic diagram showing how it is used. The material contains cement, silicate powder, aggregate, and fiber as its main components, and is formed as a non-combustible material. The manufacturing method and detailed material information overlap with those of the first embodiment described above, so a description thereof will be omitted.

[0032] The corner material 3 used for the protruding corner in this embodiment is (1) In a used state, the wall has a base 3z with 3zr exposed to the interior of the room, a wall base board B made of gypsum board or the like, and a side piece 3e with a side end surface 3ef whose tip is in a butted state (see FIG. 13(b)). (2) It is formed long from the ceiling to the floor (see Figure 14). (3) A screw groove 3ha provided in the longitudinal direction on the side piece 3e for positioning the screw S for fastening the corner material 3 to the base material X of the building such as a pillar, (4) A back groove 3hb provided at a position corresponding to the screw groove 3ha on the side (back side) of the corner material 3 that contacts the base material X of the building; (5) As shown in Figure 3, when only the curved portion 3zr of the corner material 3 is exposed and a wall finishing material (decorative board) S is arranged, the surface of the curved portion 3zr and the surface of the wall finishing material are made flat without any steps, and a finishing material boundary surface 3b is provided which is set to the same width as the thickness of the wall finishing material and is provided for positioning the wall finishing material.

[0033] By not making the corners between the wall surfaces a right angle and by exposing the curved portion 1zr of the corner material 3, advantages such as improved cleaning properties and smoother air flow within the room are obtained. As described above, the corner material 3 of this embodiment has water absorption and a low volume change rate, and since it is used with the curved surface 3zr exposed to the room, it can absorb water while maintaining a stable shape even in an environment where water is used, and has a moisture absorption effect that reduces indoor humidity. Even in an environment where a wall finishing material that prioritizes another effect must be used at the expense of water absorption and moisture absorption, the corner material 3 can be expected to have a water absorption and moisture absorption effect in the room. As mentioned above, from the standpoint of cleaning ease, it is desirable to avoid right angles between wall surfaces. However, if the exposed portion is flat, it will have a smaller surface area than a curved surface, and will have lower water absorption and moisture absorption properties than the corner material 3 of this embodiment, so it is effective for the exposed portion of corner material 1 to be curved.

[0034] (Connected corner structure for increased airtightness) Figure 16 is a plan view of the corner material 3 in this embodiment, and shows that, as in the first embodiment described above, the length L of the side piece 3e that constitutes the corner material 2 is defined as the distance between the plane P1 formed by the finishing material boundary surface 3b and the plane P2 formed by the side end surface 3ef, and the thickness W of the side piece 3e is defined as the width of the side end surface 3ef. In this embodiment, the relationship between the length L of the side piece 3e of the corner material 3 and the thickness W of the side piece 3e is preferably L>W. In other words, by setting the distance L (the length of the side piece 3e) between the plane P1 formed by the finishing material boundary surface 3b and the plane P2 formed by the side end face 3ef to be greater than the width W (the thickness of the side piece 3e) of the side end face 3ef, it is possible to suppress the flow of air between the room and the back side of the wall, which is effective in increasing the airtightness of the room.

[0035] Furthermore, similar to corner materials used at inside corners, it is possible to envisage not only corner materials having side pieces 3e on both sides of a base 3z as shown in FIG. 17, but also corner materials 4 having a side piece 3e on only one side of a base 3z.

[0036] Such corner materials of the present invention can be used as moldings not only in inside and outside corners formed by wall surfaces, but also in the areas where a ceiling and a wall surface meet, with the side end faces fitting in a butting state against the ceiling base board and wall base board, and the curved surfaces fitting flatly with the surfaces of the ceiling finishing material and wall finishing material without any steps. [Explanation of symbols]

[0037] 1, 2, 3, 4 Corner material of the present invention, 1b,3b Finishing material interface, 1e,3e side piece, 1ef,3ef side end surface, 1ha,3ha screw groove, 1hb,3hb back groove, 1z,3z base, 1zr,3zr curved part, B. Wall base board, G Adhesive, L, L' length of the side piece (the distance between the plane formed by the boundary surface of the finishing material and the plane formed by the side end surface), P1, P1' Plane formed by the interface of finishing materials, A plane formed by the side end faces P2 and P2', S wall finishing materials, W, W' Thickness of side piece (width of side end face), X Building substrates, Y-screw

Claims

1. A long corner material used as a molding for inside and outside corners formed by walls inside a building, and for parts where the ceiling and wall meet. The base is formed into an L-shaped cross section by a side piece provided at both ends or one end of the base for fixing to a base material of a building such as a pillar, This corner material is characterized in that at the boundary between the base and the side piece, a finishing material boundary surface is formed which is set to the same width as the thickness of the ceiling finishing material or wall finishing material being used, so that the surface of the curved portion of the base on the indoor side and the surface of the ceiling finishing material or wall finishing material are flat and step-free.

2. The corner material described in claim 1 contains cement, siliceous powder, aggregate, and fiber as main components, is extruded into a solid form as a non-combustible material, and is used with the curved portion of the base exposed to the indoor side.

3. The corner material described in claim 1 or 2, characterized in that the side pieces have side end faces set to the same thickness as the ceiling base board or wall base board so that they can be butted against the ends of the ceiling base board or wall base board, and screw grooves for positioning screws to be fixed to a base material of a building such as a pillar and for accommodating the heads of the screws.

4. The corner material according to claim 3, characterized in that the distance (length of the side piece) between the plane formed by the side end face and the plane formed by the boundary surface of the finishing material is set to be greater than the width (thickness of the side piece) of the side end face.

5. 5. The corner material according to claim 4, wherein the screw groove has no hole for passing a screw therethrough.

6. A corner material connection structure characterized in that the corner material described in claims 3 to 5, which has a side end face and a finishing material boundary surface, is used so that the side end face and the ceiling base board or wall base board are butted together, and the surface of the curved portion that is exposed to the inside of the room when in use and the surface of the ceiling finishing material or wall finishing material are fitted flatly without any steps.

7. The corner material connecting structure according to claim 6, characterized in that the ceiling base board or wall base board and the ceiling finishing material or wall finishing material are connected so that the plane formed by the side end face and the plane formed by the finishing boundary surface are not coplanar.

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