JP2018184719A - Ceiling structure, stepped base member, and method for construction of stepped portion of ceiling - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively show a step provided in a ceiling of a room in a building.SOLUTION: A ceiling structure (1) of a room in a building comprises a first ceiling plane (11), a second ceiling plane (12) positioned above the first ceiling plane, and a side surface part (13) connecting the first ceiling plane and the second ceiling plane. The side surface part (13) includes an inclined plane (21) retreating from the lower end toward the upper end. When the inclined plane (21) is a flat surface, it is preferable that an angle (θ) between the first ceiling plane (11) and the inclined plane (21) is 30° or more and 60° or less.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a ceiling structure having a stepped portion such as a folded ceiling, a step base member used for the stepped portion of the ceiling, and a method for constructing the stepped portion of the ceiling.

  It is often used in houses and the like that a part of the ceiling of the room is recessed upward to form a folded ceiling because a visual effect such as widening the room can be obtained. As an example of the folding ceiling, for example, the ceiling structure disclosed in Japanese Utility Model Publication No. 60-36647 (Patent Document 1) can be cited. In this ceiling structure, the rectangular frame portion of the frame body is disposed on the inner end portion of the peripheral ceiling plate, and the curtain plate is vertically disposed between the rectangular frame portion and the central ceiling plate. The inner frame end portion and the rectangular frame portion positioned thereon are covered with a substantially U-shaped (C-shaped) decorative cover.

  Moreover, in Unexamined-Japanese-Patent No. 2001-164691 (patent document 2), a square folding ceiling part, a square cylindrical folding part continuously bent downward from the four sides of the square, and from the lower side to the inside A folded ceiling unit having a rectangular frame-shaped blindfold provided in a continuous manner is used. In this ceiling structure, a lighting fixture for indirect lighting is installed on the blindfold.

Japanese Utility Model Publication No. 60-36647 JP 2001-164691 A

  In the most typical folded ceiling shape, the surface (side surface) of the folded portion is constituted by a vertical surface. On the other hand, from the standpoint of design and design, as in Patent Document 1, a folding ceiling in which a peripheral edge is applied to the lower end portion of the curtain plate by a decorative cover, and as in Patent Document 2, a lighting fixture is installed. There is a folded ceiling in which the blindfold is arranged so as to protrude inward from the lower end of the folded portion.

  However, when the level difference between the reference ceiling surface (peripheral ceiling surface) and the folded ceiling surface is relatively small, these conventional ceiling structures cannot sufficiently obtain the effect of the level difference.

  The present invention has been made in order to solve the above-described problems, and its purpose is to construct a ceiling structure, a step base member, and a stepped portion of the ceiling that can effectively show a step difference. Is to provide a method.

  A ceiling structure according to an aspect of the present invention is a ceiling structure of a room in a building, and includes a first ceiling surface, a second ceiling surface located above the first ceiling surface, and a first ceiling. A side surface that connects the surface and the second ceiling surface, and the side surface includes an inclined surface that recedes from the lower end toward the upper end.

  Preferably, the inclined surface is a flat surface, and the angle between the first ceiling surface and the inclined surface is not less than 30 ° and not more than 60 °.

  The lower end of the inclined surface intersects the first ceiling surface, and the side surface portion is located between the upper end of the inclined surface and the second ceiling surface and has a recess that is recessed rearward from the upper end of the inclined surface. It is desirable to have.

  Preferably, the height of the recess is not more than ½ of the height of the inclined surface.

  In addition, the recess is three-way by a second ceiling surface, an upright surface orthogonal to the second ceiling surface, and a bottom surface that is positioned between the upper end of the inclined surface and the lower end of the upright surface and orthogonal to the upright surface. It is desirable that the space is surrounded.

  Preferably, the ceiling structure further includes a step base member used for a step portion between the first ceiling surface and the second ceiling surface. The step base member integrally forms at least an end portion of the first ceiling surface, an inclined surface, and a bottom surface of the recess portion.

  The ceiling structure further includes a first ceiling member that constitutes the other part of the first ceiling surface, and a second ceiling member that constitutes the second ceiling surface. The step base member is preferably formed of the same material as the first ceiling member and the second ceiling member.

  Preferably, the ceiling structure further includes a parting member disposed between the step base member and the second ceiling surface and constituting an upright surface of the recess.

  In this ceiling structure, when the decorative sheet is disposed on the first ceiling surface, the second ceiling surface, and the surface of the step base member, the parting member is disposed so as to intersect the second ceiling surface. It is desirable to include a thin plate portion and a decorative sheet material that covers the surface of the thin plate portion.

  The above-described step base member may have a substantially V-shaped cross section, and may integrally form at least the end portion of the first ceiling surface and the inclined surface.

  A step base member according to another aspect of the present invention is a base member used for a step portion between a first ceiling surface of a room in a building and a second ceiling surface located above the first ceiling surface. And the lower board part which forms at least an edge part of a 1st ceiling surface, and the inclination board part which makes | forms an acute angle and intersects with a lower board part are provided.

  Preferably, the step base member further includes an upper plate portion having one end connected to the upper end of the inclined plate portion and extending in parallel with the lower plate portion.

  According to still another aspect of the present invention, a method for constructing a stepped portion of a ceiling includes a stepped portion between a first ceiling surface of a room in a building and a second ceiling surface located above the first ceiling surface. In addition, a step base member including a lower plate portion that forms at least an end portion of the first ceiling surface and an inclined plate portion that intersects the lower plate portion at an acute angle is attached.

  According to the ceiling structure of the present invention, the step between the first ceiling surface and the second ceiling surface can be effectively increased. Moreover, construction of such a ceiling structure can be easily performed by using the step base member of the present invention.

It is an external view which shows the outline of the ceiling structure which concerns on embodiment of this invention. It is sectional drawing which shows typically the shape of the level | step-difference part of the ceiling structure which concerns on embodiment of this invention. It is a figure which shows notionally the shadow which can be made into a hollow part in embodiment of this invention. It is sectional drawing which shows typically the accommodation of the level | step-difference part of the ceiling structure which concerns on embodiment of this invention. It is a side view of the level | step difference base member in embodiment of this invention. It is a top view of the level | step difference base member in embodiment of this invention. It is sectional drawing which shows typically the structure of the parting member in embodiment of this invention. It is a flowchart which shows the construction order of the ceiling structure which concerns on embodiment of this invention. It is sectional drawing which shows typically the other example of the accommodation of the level | step-difference part of the ceiling structure which concerns on embodiment of this invention. It is sectional drawing which shows typically the shape of the level | step-difference part of the ceiling structure which concerns on the modification 1 of embodiment of this invention. It is sectional drawing which shows typically the shape of the level | step-difference part of the ceiling structure which concerns on the modification 2 of embodiment of this invention. It is sectional drawing which shows typically the shape of the level | step-difference part of the ceiling structure which concerns on the modification 3 of embodiment of this invention. It is sectional drawing which shows typically the ceiling structure which concerns on the modification 4 of embodiment of this invention. It is an external view which shows the outline of a well-known ceiling structure. It is sectional drawing which shows typically the shape of the level | step-difference part of a well-known ceiling structure.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.

  In the present embodiment, a structure and construction method of a folded ceiling of a room located on the first floor of a house will be described.

(About the schematic structure of the ceiling structure)
With reference to FIG. 1 and FIG. 2, the schematic structure of the ceiling structure 1 of the room 9 in this Embodiment is demonstrated. FIG. 1 is an external view schematically showing a ceiling structure 1 according to the present embodiment. FIG. 2 is a cross-sectional view schematically showing the shape of the stepped portion of the ceiling structure 1. 2 is an enlarged view of region II in FIG. An arrow A2 shown in FIG. 1 and FIG. The room 9 is assumed to be a living room such as a living room, but may be a non-residential room such as a front door.

  The ceiling structure 1 of the room 9 includes a first ceiling surface 11, a second ceiling surface 12 positioned above the first ceiling surface 11, a first ceiling surface 11, and a second ceiling surface 12. And a side surface portion 13 connecting the two. The first ceiling surface 11 corresponds to the reference ceiling surface of the room 9. The first ceiling surface 11 is disposed so as to surround the second ceiling surface 12, and is orthogonal (intersects) with the wall 91 of the room 9. The second ceiling surface 12 corresponds to the folded ceiling surface of the room 9. The second ceiling surface 12 has a rectangular shape in plan view.

  An arrow A1 in FIG. 2 represents an outward direction when viewed from the second ceiling surface 12, and this direction indicates the rear side of the stepped portion. The direction opposite to the arrow A1 indicates the inner direction (center direction) when viewed from the first ceiling surface 11, and this direction indicates the front side of the stepped portion.

  The side surface portion 13 constitutes a rising portion (folding portion) of the ceiling structure 1. The side surface portion 13 is arranged in a cylindrical shape at a step portion between the inner end portion of the first ceiling surface 11 and the outer end portion of the second ceiling surface 12. A lighting fixture (not shown) that illuminates the indoor space of the room 9 is not disposed on the side surface portion 13 but is attached to, for example, the central portion of the second ceiling surface 12. In this case, the lighting fixture may be a ceiling type that is fixed to the second ceiling surface 12, or may be a pendant type that is suspended from the second ceiling surface 12.

  In the present embodiment, the level difference between the first ceiling surface 11 and the second ceiling surface 12, that is, the vertical height difference H is relatively small and less than 100 mm (for example, about 80 mm).

  First, the shape of a known ceiling structure 100 having a stepped portion will be briefly described with reference to FIGS. 14 and 15. The shape of the ceiling structure 100 of the room 109 is the simplest, and a side surface (surface facing inward) 113 connecting the inner edge of the first ceiling surface 111 and the outer edge of the second ceiling surface 112 is provided. , Formed by a vertical surface. That is, the side surface 113 is orthogonal to the first ceiling surface 111 at the lower end and is orthogonal to the second ceiling surface 112 at the upper end. In this case, the step H between the first ceiling surface 11 and the second ceiling surface 12 corresponds to the height dimension of the side surface 113 which is a vertical surface.

  When the resident looks up at the ceiling from below in the room 109, the height of the side surface 113 itself is recognized as the size of the step H between the first ceiling surface 11 and the second ceiling surface 12. In this case, the effect of the step H cannot be sufficiently obtained unless the step H is made relatively large. Therefore, if the step H between the first ceiling surface 11 and the second ceiling surface 12 cannot be increased due to the structure of the building frame, etc., even if the ceiling of the room 109 is a raised ceiling, The resident cannot fully feel the height of the second ceiling surface 112.

  On the other hand, in the ceiling structure 1 according to the present embodiment, as shown in FIG. 2, the side surface portion 13 has an inclined surface 21 that recedes from the lower end toward the upper end, and a hollow portion that is located above the inclined surface 21. 22. As a result, the step H between the first ceiling surface 11 and the second ceiling surface 12 can be made larger by a visual effect.

(Specific shape of the side part)
With reference to FIG. 2, the specific shape of the side part 13 of the ceiling structure 1 which concerns on this Embodiment is demonstrated.

  As described above, the inclined surface 21 of the side surface portion 13 retreats from the lower end toward the upper end. That is, the upper end of the inclined surface 21 is located behind (outside) the perpendicular line passing through the lower end. In the present embodiment, the inclined surface 21 is a smooth flat surface, and intersects the inner end of the first ceiling surface 11 at an acute angle. Specifically, the angle θ formed by the first ceiling surface 11 and the inclined surface 21 is desirably 40 ° or more and 50 ° or less, and is approximately 45 ° in the present embodiment.

  Thus, in the ceiling structure 1 according to the present embodiment, the side surface 13 is provided with the inclined surface 21 that intersects the first ceiling surface 11 at approximately 45 °, so that the entire side surface 113 is vertical due to perspective. The step (vertical difference in height) H between the first ceiling surface 11 and the second ceiling surface 12 can be shown visually larger than the known ceiling structure 100 that is a surface. In addition, since the first ceiling surface 11 and the inclined surface 21 intersect at an acute angle, a sharp impression can be given and the aesthetics of the folded ceiling of the room 9 can be improved.

  The recess 22 is located between the upper end of the inclined surface 21 and the second ceiling surface 12 and is recessed rearward from the upper end of the inclined surface 21. Specifically, the recess 22 is a space surrounded on three sides by the end 12a of the second ceiling surface 12, the bottom surface 23, and the upright surface 24 in the cross-sectional view shown in FIG. The upright surface 24 of the recess 22 is a surface orthogonal to the second ceiling surface 12. The bottom surface 23 of the recess 22 is a surface that is located between the upper end of the inclined surface 21 and the lower end of the upright surface 24 and is orthogonal to the upright surface 24. That is, the bottom surface 23 is parallel to the first ceiling surface 11 and the second ceiling surface 12.

  In the vertical direction, the height dimension h <b> 2 of the recessed portion 22 is ½ or less of the height dimension h <b> 1 of the inclined surface 21. That is, the height dimension h2 of the recess 22 is less than ½ of the step H. Further, it is desirable that the length along the inclined direction of the inclined surface 21 is not less than the step H. Thereby, since the presence of the inclined surface 21 is conspicuous, the step H can be effectively made large.

  In the present embodiment, the extension line of the inclined surface 21 passes near the intersection Pa between the second ceiling surface 12 and the upright surface 24 in a cross-sectional view. Therefore, when the side surface portion 13 is viewed from below, the upright surface 24 at the back of the recessed portion 22 is not visible at all or almost from the bottom. Therefore, it is possible to create a floating feeling that the second ceiling surface 12 is floating in the air. In order to generate such a floating feeling, it is desirable that the extended line of the inclined surface 21 intersects the second ceiling surface 12.

  Further, as shown in FIG. 3, since the shadow 220 is formed on substantially the entire depression 22, the effect of the shadow 220 causes an illusion that the inclined surface 21 continues beyond the upper end to the far end. Can do. As a result, the level difference H can be shown more effectively.

  Thus, according to the ceiling structure 1 of the present embodiment, not only the stepped portion of the ceiling structure 1 can be decorated three-dimensionally, but also the step H can be shown to be large due to visual effects. An open feeling can be improved.

  The angle θ formed between the first ceiling surface 11 and the inclined surface 21 may be an angle that can be visually recognized up to the upper end of the inclined surface 21 when viewed from below and provides a sense of perspective. It may be arbitrarily determined within the range of from 60 ° to 60 °.

  Moreover, the height dimension h2 of the hollow part 22 should just be smaller than the height dimension h1 of the inclined surface 21, and may be 1/2 or more of the height dimension h1.

(About the ceiling structure)
Next, the accommodation of the stepped portion for realizing the ceiling structure 1 according to the present embodiment will be described with reference to FIG. FIG. 4 is a cross-sectional view schematically showing the accommodation of the stepped portion of the ceiling structure 1 according to the present embodiment.

  As shown in FIG. 4, the step portion of the ceiling structure 1 is mainly configured by a step base member 41, a first ceiling member 42, a second ceiling member 43, and a parting member 45.

  The step base member 41 is a member that integrally forms the (at least) inner end portion of the first ceiling surface 11 shown in FIG. 2, the inclined surface 21, and the bottom surface 23 of the recessed portion 22. The first ceiling member 42 is a plate-like member that constitutes a portion (other portion) excluding the inner end portion of the first ceiling surface 11. The second ceiling member 43 is a plate-like member that constitutes the second ceiling surface 12. The first ceiling member 42 and the second ceiling member 43 are both made of the same material, and are typically gypsum boards. The parting member 45 is a thin plate-like member that forms the upright surface 24 of the recess 22 shown in FIG.

  The step base member 41 and the parting member 45 constitute the side surface portion 13 of the ceiling structure 1 and extend along one side of the rectangular second ceiling surface 12 (in a direction penetrating the paper surface in FIG. 4).

  A specific structure example of the step base member 41 will be described with reference to FIGS. 5 and 6. FIG. 5 is a side view of the step base member 41. FIG. 6 is a view of the step base member 41 seen from the direction of the arrow VI in FIG. 5, and is a top view of the step base member 41. In the description of the step base member 41, a direction orthogonal to the longitudinal direction of the step base member 41 is referred to as a depth direction.

  The step base member 41 includes a lower plate portion 51, an inclined plate portion 52 that intersects the lower plate portion 51 at an acute angle, and one end connected to the upper end of the inclined plate portion 52 so as to extend parallel to the lower plate portion 51. It is comprised with the side-plate part 53. FIG. The angle formed between the lower plate portion 51 and the inclined plate portion 52 is the above-described angle θ (for example, 45 °). Further, the height dimension h11 of the step base member 41 is substantially equal to the height dimension h1 of the inclined surface 21.

  The depth dimension L1 of the lower plate portion 51 is larger than the depth dimension L2 of the inclined plate portion 52 and the upper plate portion 53, and the lower plate portion 51 has an extended portion 510 on the rear side when viewed from above. Yes.

  The step base member 41 is also a gypsum board, and a lower plate portion 51, an inclined plate portion 52, and an upper plate portion 53 are integrally formed. Thus, since the level | step difference base member 41 is formed with the same material as the 1st ceiling member 42 and the 2nd ceiling member 43, the side part 13 can be harmonized with another ceiling part without a sense of incongruity.

  FIG. 7 is a cross-sectional view schematically showing the configuration of the parting member 45. The parting member 45 includes a thin plate portion 61 formed of, for example, MDF (medium fiber board), and a decorative sheet material 62 that covers the thin plate portion 61. The height dimension h12 of the parting member 45 is substantially equal to the height dimension h2 of the recess 22 but is slightly smaller than that. The decorative sheet material 62 is substantially the same color as the decorative sheet 72 for the first ceiling member 42 described later, and is preferably the same material. As shown in FIG. 7, the decorative sheet material 62 only needs to cover at least the surface (surface facing inward) of the thin plate portion 61.

(About the construction method of the stepped part of the ceiling)
Then, the construction method of the level | step-difference part of the ceiling structure 1 is demonstrated, referring FIG. 4 and FIG. FIG. 8 is a flowchart showing the construction sequence of the ceiling structure 1.

  The worker first fixes the first and second ceiling members 42 and 43 to the base members 31 and 32, respectively (step P1). These base members 31 and 32 are fixed directly or indirectly to a housing (not shown) such as a beam of a building (house) in advance. The base member 31 is disposed away from the base member 32 in the outward direction, and is disposed relatively below the base member 32. In a region defined by the base member 31 and the base member 32, a base member 33 having a height and made of, for example, plywood is provided.

  Next, after the vertical member 44 is fixed to the lower portion of the inner surface of the base member 33 below the second ceiling member 43 to form a stepped portion, the stepped base member 41 described above is attached to the stepped portion. Fix (step P2). The vertical member 44 is a plate-like member that serves as a base of the side surface portion 13 of the ceiling structure 1. The vertical member 44 is also preferably a gypsum board.

  In the step base member 41, the end surface 511 of the lower plate portion 51 is in contact with (or close to) the inner end surface of the first ceiling member 42, and the end surface 530 of the upper plate portion 53 is in contact with the vertical member 44 (or It is fixed in a close state.

  The step base member 41 can be attached by lifting the step base member 41 straight from below to the position shown in FIG. The step base member 41 is fixed in a state where the upper surface of the extended portion 510 of the lower plate portion 51 is in contact with the lower surfaces of the base members 31 and 33 and the vertical member 44. The step base member 41 is temporarily fixed by screws 71 after temporarily fixing the upper surface of the extended portion 510 of the lower plate portion 51 and the base members 31, 33 and the like with an adhesive.

  After fixing the step base member 41, the parting member 45 is fixed between the step base member 41 and the second ceiling member 43 (step P3). The parting member 45 is fixed to the surface (inner surface) of the vertical member 44 by, for example, an adhesive.

  When the parting member 45 is fixed, the decorative sheet 73 is attached to the lower surface of the second ceiling member 43, and the lower surface of the first ceiling member 42 and the surface of the step base member 41 (that is, the lower surface and side surfaces of the step base member 41, And the decorative sheet 72 is affixed on the upper surface (step P4). In addition, before constructing the decorative sheet 72, it is desirable to finish the lower surface of the connection portion between the first ceiling member 42 and the lower plate portion 51 of the step base member 41 to a smooth surface by putty processing.

  As described above, the ceiling structure 1 can be easily constructed by using the pre-processed step base member 41. That is, the stepped portion including the side surface portion 13 can be easily and accurately constructed by the step base member 41. In addition, by using the parting member 45 to which the decorative sheet material 62 is attached in advance, it is possible to eliminate the need for attaching the decorative sheet to the portion corresponding to the upright surface 24 of the recess 22 at the site. Therefore, the construction of the decorative sheets 72 and 73 can be simplified.

  In the present embodiment, the first ceiling surface 11 is configured by the first ceiling member 42 and the lower plate portion 51 of the step base member 41. For example, the second ceiling surface 12 is a room. In the case of occupying most of the ceiling, the first ceiling member 42 may be omitted. That is, the first ceiling surface 11 of the room 9 may be configured only by the lower plate portion 51 of the step base member 41.

(Other examples of ceiling structure storage)
The accommodation for realizing the ceiling structure 1 is not limited to the above example. FIG. 9 is a cross-sectional view schematically illustrating another example of the stepped portion of the ceiling structure 1.

  In the example of FIG. 9, the step portion of the ceiling structure 1 includes a step base member 41 </ b> A instead of the step base member 41 shown in FIG. 4. The step base member 41A is composed of three members. That is, the step base member 41 </ b> A includes a base material 81 having a trapezoidal cross section, a corner material 82 having a substantially V-shaped cross section, and a triangular material 83 inserted inside the tip end portion of the corner material 82.

  In this example, the first ceiling member 42 is disposed so as to protrude inward from the vertical member 44, and a trapezoidal base material 81 is placed on the protruding portion. The base material 81 is, for example, wood. The angle formed by the lower base side of the base material 81 and one leg side is substantially a right angle, and the side surface corresponding to the one leg side comes into contact with the vertical member 44. The angle formed by the lower base side of the base material 81 and the other leg side is the angle θ of the inclined surface 21 described above. The top surface corresponding to the upper base of the base material 81 constitutes the bottom surface 23 of the recess 22.

  The corner member 82 is a member that integrally forms the inner end portion of the first ceiling surface 11 and the inclined surface 21. That is, the corner member 82 includes a lower plate portion 51A and an inclined plate portion 52A that intersects the lower plate portion 51A at an acute angle. The corner member 82 is formed, for example, by bending a thin plate made of ABS resin. In the fixed state, the lower plate portion 51 </ b> A is in surface contact with the lower surface of the first ceiling member 42, and the inclined plate portion 52 </ b> A is in surface contact with the inclined surface of the base material 81. In order to facilitate the construction of the corner member 82, it is desirable that one surface of a double-sided tape is previously attached to the upper surface of the lower plate portion 51A.

  The cross section of the triangular member 83 is a right triangle, and the angle formed between the lower surface of the triangular member 83 and the inclined surface is the angle θ described above. The triangular member 83 is formed of a rigid member such as a resin. By inserting the triangular member 83 into the tip of the corner member 82, the shape of the bent portion of the corner member 82 can be maintained. It is desirable that the triangular member 83 is fixed to the corner member 82 in advance in the factory, and the corner member 82 and the triangular member 83 are integrally formed. Thereby, since a number of parts can be decreased, workability improves.

  In the construction of the stepped base member 41A, first, the base material 81 is placed in such a manner that a side surface (surface facing rearward) corresponding to one leg side of the trapezoidal base material 81 abuts against the surface of the vertical member 44. 1 on the ceiling member 42. The trapezoidal base material 81 is fixed to the base member 31 of the stepped portion by a nail or the like.

  Thereafter, the corner member 82 with the triangular member 83 is disposed so as to cover the inner end portion of the first ceiling member 42 and the inclined surface of the base member 81. The corner member 82 is attached so that the exposed surface (the rearward facing surface) of the triangular member 83 abuts against the front end surface of the first ceiling member 42. In the attached state, the lower surface of the triangular member 83 and the lower surface of the first ceiling member 42 are arranged flush with each other. Further, the inclined surface of the triangular member 83 and the inclined surface of the base material 81 are also flush.

  When the corner member 82 is attached, the release sheet of the double-sided tape provided in advance on the lower side plate portion 51A is peeled off, and the other side of the double-sided tape is bonded to the first ceiling member 42, so The ceiling member 42 can be easily temporarily fixed. The inclined plate portion 52A is fixed to the base material 81 with, for example, an adhesive applied to the back surface of the inclined plate portion 52A.

  After the corner member 82 is fixed, the parting member 45 is fixed to the vertical member 44 positioned between the trapezoidal base material 81 and the second ceiling member 43.

  9 shows an example in which the inclined plate portion 52A of the corner member 82 covers only the lower half of the inclined surface of the base material 81, but the inclined plate portion 52A covers the entire inclined surface of the base material 81. May be. That is, the inclined surface 21 of the side surface portion 13 of the ceiling structure 1 may be constituted by the inclined plate portion 52A and the inclined surface of the base material 81, or may be constituted only by the inclined plate portion 52A.

  In this example, the step base member 41A is configured by three or two members, but the step base member may be configured by only the corner member 82. That is, the step base member only needs to include at least the lower plate portion 51A and the inclined plate portion 52A.

(Modification 1)
In the present embodiment, the inclined surface 21 in the side surface portion 13 of the ceiling structure 1 is a flat surface. However, if the surface is formed so as to recede from the lower end toward the upper end, it is not a flat surface. May be. For example, like the side surface portion 13A of the ceiling structure 1A shown in FIG. 10, the inclined surface 21A may be a curved surface. In addition, a curved surface is not limited to a convex curved surface like 21 A of inclined surfaces, A concave curved surface may be sufficient.

  The inclined surface is not limited to a smooth surface, and may have some unevenness. For example, a stepped surface in which a plurality (three or more) of relatively small steps are formed may be used.

(Modification 2)
In the present embodiment, the side surface portion 13 of the ceiling structure 1 has the recess portion 22, but the recess portion does not have to be provided like the side surface portion 13B of the ceiling structure 1B shown in FIG. That is, the side surface portion 13 </ b> B may be configured only by the inclined surface 21. In this case, the inclined surface 21 intersects not only the first ceiling surface 11 but also the second ceiling surface 12.

(Modification 3)
In the present embodiment, the inclined surface 21 in the side surface portion 13 of the ceiling structure 1 intersects with the first ceiling surface 11, but the first surface as in the side surface portion 13C of the ceiling structure 1C shown in FIG. It does not have to intersect the ceiling surface 11 of For example, a protruding portion 25 that protrudes inward from the lower end edge of the inclined surface 21 may be disposed below the inclined surface 21.

(Modification 4)
As shown in FIGS. 2 and 10, when the side surface portion of the ceiling structure has the recessed portion 22, a small lighting device may be disposed in the recessed portion 22. FIG. 13 schematically shows a ceiling structure 1D according to this modification. Illumination device 26 arranged in hollow portion 22 in ceiling structure 1D is, for example, a line-shaped LED.

  It is desirable that the illumination device 26 be disposed behind the upper end of the inclined surface 21 (without protruding inward from the position of the upper end of the inclined surface 21). Thereby, the design property of ceiling structure 1D can be improved, enabling the indirect illumination of a folding ceiling.

(Other variations)
In the above description, the folded ceiling in which the first ceiling surface 11 is the reference ceiling surface has been described. However, in the ceiling structure according to the present embodiment or its modification, the second ceiling surface 12 is the reference ceiling surface. It can also be applied to falling ceilings.

  Although the room 9 to which the ceiling structure 1 is applied is a room in a house, it may be a building other than a house, for example, a room such as various facilities or an office building.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  1, 1A, 1B, 100 Ceiling structure, 9,109 rooms, 11, 111 First ceiling surface, 12, 112 Second ceiling surface, 13, 13A, 13B Side surface, 21, 21A Inclined surface, 22 Recessed portion , 23 bottom surface, 24 upright surface, 31, 32, 33 base member, 41, 41A step base member, 42 first ceiling member, 43 second ceiling member, 44 vertical member, 45 parting member, 51, 51A lower plate Part, 52, 52A inclined plate part, 53 upper plate part, 61 thin plate part, 62 decorative sheet material, 71 screw, 72, 73 decorative sheet, 81 base material, 82 corner material, 83 triangular material, 91 wall, 113 side surface, 220 shade, H step.

Claims (13)

The ceiling structure of the room in the building,
A first ceiling surface;
A second ceiling surface located above the first ceiling surface;
A side surface portion connecting the first ceiling surface and the second ceiling surface;
The side surface portion has a ceiling structure including an inclined surface that recedes from the lower end toward the upper end. The inclined surface is a flat surface;
The ceiling structure according to claim 1, wherein an angle between the first ceiling surface and the inclined surface is not less than 30 ° and not more than 60 °. A lower end of the inclined surface intersects the first ceiling surface;
The said side part has a hollow part which is located between the upper end of the said inclined surface, and the said 2nd ceiling surface, and is dented back rather than the upper end of the said inclined surface. Ceiling structure.   The ceiling structure according to claim 3, wherein a height dimension of the hollow portion is ½ or less of a height dimension of the inclined surface.   The recess is located between the second ceiling surface, an upright surface orthogonal to the second ceiling surface, an upper end of the inclined surface, and a lower end of the upright surface, and orthogonal to the upright surface. The ceiling structure according to claim 3 or 4, wherein the ceiling structure is a space surrounded on three sides by a bottom surface. A step base member used for a step portion between the first ceiling surface and the second ceiling surface;
The ceiling structure according to claim 5, wherein the step base member integrally forms at least an end portion of the first ceiling surface, the inclined surface, and a bottom surface of the hollow portion. A first ceiling member constituting the other part of the first ceiling surface, and a second ceiling member constituting the second ceiling surface;
The ceiling structure according to claim 6, wherein the step base member is made of the same material as the first ceiling member and the second ceiling member.   The ceiling structure according to claim 6 or 7, further comprising a parting member disposed between the step base member and the second ceiling surface and constituting an upright surface of the recess. A decorative sheet is disposed on the surface of the first ceiling surface, the second ceiling surface, and the step base member,
The ceiling structure according to claim 8, wherein the parting member includes a thin plate portion disposed so as to intersect the second ceiling surface, and a decorative sheet material that covers a surface of the thin plate portion. A step base member used for a step portion between the first ceiling surface and the second ceiling surface;
The ceiling structure according to claim 1, wherein the step base member has a substantially V-shaped cross section and integrally forms at least an end portion of the first ceiling surface and the inclined surface. . A base member used for a step portion between a first ceiling surface of a room in a building and a second ceiling surface located above the first ceiling surface,
A lower plate forming at least an end of the first ceiling surface;
A step base member comprising an inclined plate portion that intersects the lower plate portion at an acute angle.   The step base member according to claim 11, further comprising an upper plate portion having one end connected to an upper end of the inclined plate portion and extending in parallel with the lower plate portion.   A lower portion that forms at least an end of the first ceiling surface at a step portion between a first ceiling surface of a room in the building and a second ceiling surface located above the first ceiling surface. A method for constructing a step portion on a ceiling, comprising: attaching a step base member including a side plate portion and an inclined plate portion intersecting with the lower plate portion at an acute angle.

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