JP2015042827A - Ceiling board for system ceiling and system ceiling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a system ceiling in which ceiling boards 10 and ceiling facility equipment are placed on a ceiling substrate formed by assembling, in a lattice form, bar members 6 suspended from a ceiling slab 1 to support them, the system ceiling that makes the sagging (deformation) in the center of the ceiling board 10 inconspicuous.SOLUTION: Granular painting including particles 13 having an average particle diameter of a coating film thickness (t) of a decorative coating film 12 or more and 1 mm or less, is applied to an indoor side surface of the ceiling board 10. Even if a central part M of the ceiling board 10 sags, a shadow is made by light incident on granular parts 14 composed of the particles 13 projected from the coating film 12 in its peripheral edge part C to generate a shadow over the whole ceiling board 10, so that the whole ceiling board 10 is made apparently uniformly visible to make the sagging (deformation) of the central part of the ceiling board 10 inconspicuous.

Description

  The present invention relates to a ceiling plate for a system ceiling and a system ceiling on which the ceiling plate is constructed, and more particularly to a technique for suppressing a decrease in appearance appearance associated with the hanging of the ceiling plate.

  2. Description of the Related Art Conventionally, a system ceiling that can efficiently arrange lighting equipment, air conditioning equipment, and safety equipment (sensors, sprinklers, smoke exhausting equipment, inspection ports, etc.) has been generally used as an office ceiling. This system ceiling is configured by assembling a plurality of metal bar members in parallel or lattice form and suspending them from the ceiling slab, and placing various equipment and ceiling members on these bar members. According to this structure, not only can a ceiling work for a large area be performed easily, but also maintenance and refurbishment can be performed without much effort.

  As the ceiling material, a rock wool decorative sound absorbing plate that is lightweight and excellent in sound absorption and design is generally used. However, since this rock wool decorative sound-absorbing plate only has its peripheral part placed on and locked to the bar material, if the humidity is high during construction, the ceiling material absorbs moisture, and the center part is lowered by its own weight. The phenomenon which bends slightly and hangs slightly from a peripheral part arises. And in the office, the windows on the side of the building are large, and the light that enters the room through the windows strikes the ceiling surface diagonally, so the hanging part looks black and the light reflects off the periphery. As a result, there is a problem that even a slight sag is noticeable greatly (see FIG. 6).

  Conventionally, for example, as disclosed in Patent Document 1, it has been proposed to strengthen the plate material itself by laminating it with a metal plate so as not to bend.

Japanese Patent Laid-Open No. 06-240799

  However, in the above proposal, not only the ceiling material becomes expensive due to the lamination of the plate material and the metal plate, but also the problem of peeling of the laminated portion of the plate material and the metal plate is unavoidable, and the stable effect Cannot be obtained.

  An object of the present invention is to make the bending inconspicuous by adding a device to the surface of a ceiling plate used by being placed on a bar material on the system ceiling.

  In order to achieve the above object, in the present invention, the ceiling plate itself is not reinforced to suppress the occurrence of bending, but the bending is left as it is, and the ceiling plate is exposed to light against the surface of the ceiling plate. In some cases, granular coating is applied so that shadows are also produced at the peripheral edge so that the bending is less noticeable.

  Specifically, the first invention is a system that is supported in a state in which the bar material suspended from the ceiling slab is placed on the bar material together with the ceiling equipment on the periphery of the ceiling base material in a lattice shape. In the ceiling ceiling plate, the interior surface is coated with a granular coating containing particles, and the average particle size of the particles is equal to or greater than the thickness of the coating film formed by the paint component excluding the particles. And it is 1 mm or less.

  If the average particle diameter of the particles in the granular coating exceeds 1 mm, the amount of protrusion from the coating film increases, and the coating particles are easily peeled off during transportation or construction of the ceiling panel, so that it is 1 mm or less.

  In the first aspect of the invention, since the surface of the ceiling plate is coated with a granular coating containing particles having an average particle size of not less than the thickness of the coating film and not more than 1 mm, the ceiling plate is placed on the bar material at the peripheral portion. Even when the center portion is bent so as to hang down from the peripheral portion, the peripheral portion can be shaded by the light hitting the granular portion made of particles protruding from the coating film. This shadow causes a shadow on the peripheral part and a shadow is generated on the entire ceiling panel, so that the entire ceiling panel can be seen evenly, and the hanging (bending) of the central part of the ceiling panel is hardly noticeable.

  Moreover, since the coating particle of granular coating is 1 mm or less, it becomes difficult for a coating particle to peel off during conveyance of a ceiling board, or construction, and the stable effect is acquired.

  According to a second invention, in the first invention, the average particle size of the particles is 0.15 mm or more.

  In this second invention, the thickness of the coating film formed on the surface of the ceiling board is about 150 μm at the maximum, and in order to make the average particle diameter of the particles equal to or greater than this coating film thickness, it is set to 0.15 mm or more . As a result, the optimum average particle diameter of the particles that effectively exhibits the effect of the first invention can be specifically obtained.

  The system ceiling of the third invention is characterized in that the ceiling plate for the system ceiling of the first or second invention is constructed.

  In the third aspect of the invention, a system ceiling is obtained in which the sag (bending) at the center of each ceiling plate is not noticeable.

  As described above, according to the present invention, a granular coating containing particles is applied to the interior surface of a ceiling board for a system ceiling, and the average particle size of the particles is determined by a coating film formed by a paint component excluding the particles. When the center part of the ceiling plate hung on the bar material hangs down from the peripheral part, the peripheral part is affected by the light hitting the granular part protruding from the coating film. It is possible to make the entire ceiling plate look even, and to make the hanging of the central portion of the ceiling plate stable and less noticeable.

FIG. 1 is a perspective view showing the structure of the system ceiling as viewed from above. FIG. 2 is an enlarged sectional view showing the structure of the system ceiling. FIG. 3 is a cross-sectional view of the bar material. FIG. 4 is an enlarged plan view of the surface of the ceiling board. FIG. 5 is an enlarged cross-sectional view showing a coating film and a granular portion of the granular coating applied to the surface of the ceiling board. FIG. 6 is a cross-sectional view showing a state in which the center portion of the ceiling board placed on the bar material is bent downward. FIG. 7 is a diagram illustrating a paint composition in granular coating for Examples and Comparative Examples.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the embodiments is merely illustrative in nature and is not intended to limit the present invention, its application, or its use at all.

  1 and 2 show a system ceiling according to an embodiment of the present invention, wherein 1 is a ceiling slab that constitutes a ceiling portion of a room interior of a building, 2 is a suspension bolt that is embedded and fixed in the ceiling slab 1, 3 Is a hanger attached to the lower end portion of the suspension bolt 2 with nuts 4, 4, and a plurality of bar members 6, 6... Are fixedly attached to the lower end portion of the hanger 3. Are suspended from a ceiling slab 1 by suspension bolts 2 and hangers 3.

  Each of the bar members 6 is made of a metal having a T-shaped cross section, and as shown in FIG. 3, a rectangular cylindrical fixing portion 6a positioned at the upper end and a plate-like shape extending downward from the lower end of the fixing portion 6a. The connecting portion 6b is provided with a pair of left and right engaging portions 6c, 6c that are continuous with the lower end of the connecting portion 6b and extend in the horizontal direction. The portion 6b and the locking portions 6c, 6c are suspended in a state where the T shape is in a reverse direction with a T-shaped cross section.

  The plurality of bar members 6, 6,... Are arranged in a horizontal and vertical direction and arranged in a lattice shape in a plan view, and these bar members 6, 6,. It is configured. A plurality of rectangular accommodation ports 8, 8,... Are formed between the bar materials 6, 6,... An apparatus (not shown) is fixedly supported, and ceiling plates 10, 10,... Are supported on the remaining receiving ports 8, 8,. A grid-like grid ceiling surface is formed by the devices and the ceiling boards 10, 10,.

  As shown in FIGS. 2 and 4, each ceiling plate 10 is made of, for example, a rock wool material having a size of 600 × 600 mm corresponding to the size of the storage port 8, and is formed at the lower corners of the four peripheral edges. A notch step portion 10 a is formed by cutting the corner portion into a rectangular cross section, and the lower surface of each notch step portion 10 a is placed on the upper surface of the locking portion 6 c of the bar member 6 around the accommodation port 8. By doing so, the ceiling board 10 is supported in a state of being placed on the bar material 6.

  A plurality of pin holes 11, 11,... For sound absorption are opened on the surface of the ceiling board 10 on the indoor side (lower side).

  As shown in FIGS. 4 and 5, the interior side (lower side) surface of the ceiling board 10 is subjected to granular coating with a water-based paint in which particles 13, 13,. The decorative coating film 12 is formed, and thus the ceiling board 10 is a rock wool makeup sound absorbing board.

  And the average particle diameter of particle | grains 13,13, ... by the said granular coating is more than coating-film thickness t of the decorative coating film 12 formed in the ceiling board 10 surface by the coating-material component except particle | grains 13,13, ... In addition, the granular portions 14, 14,... Protruding from the coating film 12 are formed by the particles 13, 13,. Thus, for example, when light entering the room through a building window (not shown) or the like strikes the surface (lower surface) of the plurality of ceiling plates 10, 10,. Are caused to have a shadow on the surface of the ceiling plate 10 by the granular portions 14, 14,.

  The paint in the granular coating contains a resin, a pigment, a decorative aggregate, an additive, water and the like as a composition. As the resin, for example, vinyl acetate, poval (PVA), acrylic, or the like is used.

  As the pigment, a white pigment and an extender are used. White pigments are used as colorants, and are required to have no specific absorption in colors in the visible region and to have a large refractive index and are opaque. For example, zinc white (zinc oxide) and titanium oxide are prominent. Used for. On the other hand, extender pigments are white pigments that are used as other pigments, paint extenders, and as mixing agents for improving colorability, strength, etc. For example, calcium carbonate, barium sulfate, aluminum hydroxide, etc. are used. .

  As additives, dispersants, thickeners, antifoaming agents, fungicides and the like are added.

  For the decorative aggregate, as described above, an inorganic powder containing particles 13, 13,... Having an average particle diameter of not less than the coating thickness t of the cosmetic coating film 12 on the surface and not more than 1 mm is used. Is preferred. Generally, the thickness t of the coating film 12 formed on the surface of the ceiling board 10 made of rock wool makeup sound-absorbing board is 50 to 150 μm, and if it is overcoated after undercoating, it becomes about 100 μm (= 50 μm × 2), and further coloring When applied, the thickness is about 150 μm.

  In order to form a shadow by forming the granular portions 14, 14,... Protruding from the coating film 12 with the particles 13, 13,... Of the decorative aggregate, the average particle diameter of the particles 13 in the decorative aggregate is determined as the coating film. The thickness is not less than t, that is, not less than 0.15 mm (150 μm). Further, in order to prevent the granular portions 14, 14,... From peeling off from the coating film 12, the average particle diameter of the particles 13 is empirically set to 1 mm or less (the depth of the adhesion portion of the particles 13 to the coating film 12). 10% or more).

  Therefore, as shown in FIG. 6, in the construction state of the system ceiling, a plurality of ceiling plates 10, 10,... Are placed on the bar members 6, 6,. When the part M bends so that it hangs down from the peripheral part C, light entering the room through a building window or the like hits the surface of the ceiling boards 10, 10,. The central part M hanging down 10 is black because the light is blocked, and the peripheral part C (the part where the bar material 6 is in contact with the adjacent ceiling plate 10) tends to appear white. However, in this embodiment, since the surface of each ceiling board 10 has been subjected to a granular coating containing particles 13, 13,... Having an average particle diameter of 1 mm or less at a thickness t or more of the coating film 12, Are uniformly shaded on the entire ceiling plate 10 by light striking the granular portions 14, 14,... Composed of the particles 13, 13,... Protruding from the coating film 12 (in FIG. The size is exaggerated). That is, a shadow is formed on the peripheral edge portion C in the same manner as the central portion M, so that a shadow is generated on the entire ceiling plate 10, and the entire ceiling plate 10 appears to be evenly and apparently. 10 The sagging (deflection) of the central part becomes inconspicuous. As a result, a system ceiling is obtained in which the sag of the central portion of each ceiling board 10 is less noticeable.

  Further, since the particles 13, 13,... Of the granular coating are 1 mm or less, the particles 13, 13,. can get.

  Next, specific examples will be described.

(Example)
As shown in FIG. 7, a water-based paint with 10% by weight of resin, 50% by weight of pigment, 10% by weight of decorative aggregate, 1% by weight of additive, and 29% by weight of water was prepared. A granular coating was applied to the surface to form a coating film.

(Comparative example)
As shown in FIG. 7, a water-based paint having 10% by weight of resin, 60% by weight of pigment, 1% by weight of additive, and 29% by weight of water is prepared, and the surface of the rock wool sound absorbing plate is coated to form a coating film. Formed.

  The ceiling plate of the example and the comparative example was placed on the bar material of the system ceiling, and when the occurrence of shadow was observed in the hanging state of the central portion, in the ceiling plate of the comparative example, the central portion was black, the peripheral portion On the other hand, in the ceiling board of the example, shadows were generated in the peripheral portion as well as the central portion, and no difference due to the shadows was generated as a whole.

  The present invention is extremely useful and has high industrial applicability, because even if the center part of the ceiling plate placed on the bar material of the system ceiling hangs down from the peripheral part, the sag is less noticeable.

DESCRIPTION OF SYMBOLS 1 Ceiling slab 6 Bar material 6c Locking part 8 Accommodating port 10 Ceiling board 12 Makeup coating film t Coating film thickness (thickness formed by paint components excluding particles)
13 particles 14 granular parts

Claims (3)

In the ceiling plate for the system ceiling that is supported in a state where the bar material suspended from the ceiling slab is placed on the bar material together with the ceiling equipment on the ceiling base that is assembled in a lattice shape,
The interior surface is coated with a granular coating containing particles,
The ceiling plate for a system ceiling, wherein the average particle diameter of the particles is not less than the thickness of a coating film formed by a paint component excluding the particles and not more than 1 mm. In claim 1,
A ceiling plate for a system ceiling, wherein the average particle size of the particles is 0.15 mm or more.   A system ceiling, wherein the ceiling plate for the system ceiling according to claim 1 or 2 is constructed.