Ceiling structure

Abstract

To easily construct a ceiling having complicated shape.SOLUTION: Each of planar trusses 13a to 13f has a substantially straight upper chord, a substantially straight lower chord disposed below and substantially parallel to the upper chord, and a connecting member connecting between the upper chord and the lower chord. A minor beam connects between the lower chords of the planar trusses 13a to 13f, the 16a and the 16b are directly fixed to the beam, and the planar trusses 13a to 13f are different from each other in a distance between the upper chord and the lower chord. The minor beam has shape along the shape of the ceiling 16a or 16b.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a ceiling structure. [Background technology]

[0002] Suspended ceilings have the advantage of providing space above the ceiling, providing excellent sound insulation, and allowing ducts and other equipment to be passed through. However, in large facilities such as large halls, ceiling boards need to be reinforced to prevent them from falling in the event of an earthquake. Patent Document 1 discloses an earthquake-resistant reinforcement structure for a suspended ceiling. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2022-088271 Summary of the Invention [Problem to be solved by the invention]

[0004] In large halls, the ceiling may have a complex shape due to considerations such as acoustics. If a ceiling with such a complex shape is constructed as a suspended ceiling, it is difficult to ensure construction accuracy. Furthermore, when a suspended ceiling is reinforced, it becomes necessary to place facilities such as inspection corridors and ducts around the reinforcement material. The present invention aims to solve such problems, for example. [Means for solving the problem]

[0005] The ceiling structure has a plurality of plane trusses, sub-beams, and a ceiling. The plurality of plane trusses have substantially straight upper chords, substantially straight lower chords arranged below the upper chords and substantially parallel to the upper chords, and a plurality of connecting members connecting the upper chords and the lower chords. The plurality of sub-beams connect the lower chords of the plurality of plane trusses. The ceiling is fixed directly to the plurality of sub-beams. The plurality of plane trusses have mutually different spacings between the upper chords and the lower chords. The plurality of sub-beams have a shape that follows the shape of the ceiling. [Effects of the Invention]

[0006] Since the ceiling is fixed directly to the small beams that connect the lower chords of the plane truss, it is not a suspended ceiling structure, so construction precision can be easily ensured, there is no need for reinforcement, and equipment such as inspection corridors and ducts can be easily placed above the ceiling. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a perspective view showing an example of a ceiling structure. [Figure 2] FIG. [Figure 3] FIG. [Figure 4] FIG. [Figure 5] FIG. 1 is a perspective view showing an example of a truss. [Figure 6] FIG. 1 is a perspective view showing an example of a ceiling. DETAILED DESCRIPTION OF THE INVENTION

[0008] The ceiling structure 10 will be described with reference to FIGS. The ceiling structure 10 is a structure that is applied to a large space such as a large hall, and the ceiling has a complex shape, such as a curved surface or steps. The ceiling structure 10 includes, for example, columns 11a-11d, girders 12a and 12b, trusses 13a-13f, joists 14a-14t and 15a-15o, and ceilings 16a and 16b.

[0009] The pillars 11a to 11d are steel frames such as H-beams, and are long members that extend in the substantially vertical direction (±Z direction). The pillars 11a to 11d support the entire ceiling structure 10.

[0010] The girders 12a and 12b are steel frames such as H-shaped steel beams, and are long members that extend in the approximately horizontal direction (±X direction). The girder 12a is bridged between the pillars 11a and 11d, fixed to the pillars 11a and 11d, and supported by the pillars 11a and 11d. The girder 12b is bridged between the pillars 11b and 11c, fixed to the pillars 11b and 11c, and supported by the pillars 11b and 11c.

[0011] The trusses 13a to 13f are beam members having a planar truss structure, and extend in a substantially horizontal direction (±Y direction) that is substantially perpendicular to the girders 12a and 12b. The trusses 13a to 13f are arranged spaced apart in the same direction (±X direction) as the extension direction of the girders 12a and 12b. The truss 13a is bridged between the columns 11a and 11b, fixed to the columns 11a and 11b, and supported by the columns 11a and 11b. The trusses 13b to 13e are bridged between the girders 12a and 12b, fixed to the girders 12a and 12b, and supported by the girders 12a and 12b. The truss 13f is bridged between the columns 11d and 11c, fixed to the columns 11d and 11c, and supported by the columns 11d and 11c.

[0012] The truss 13c will be described in detail with reference to Fig. 4. The other trusses 13a, 13b and 13d to 13f are similar, so detailed descriptions will be omitted. The truss 13c has, for example, an upper chord member 31, a lower chord member 32, and connecting members 33a to 33h. The upper chord member 31 is, for example, a steel frame such as an H-shaped steel beam, and is a long member that extends substantially linearly in the substantially horizontal direction (±Y direction). The lower chord member 32 is a steel frame such as an H-shaped steel beam, and is a long member that extends approximately linearly in a direction approximately parallel to the extension direction of the upper chord member 31 (±Y direction), and is positioned below the upper chord member 31 (-Z direction). The connecting members 33a to 33h are steel frames such as H-shaped steel beams, and are long members that extend diagonally and approximately linearly in the plane (YZ plane) formed by the upper chord member 31 and the lower chord member 32. The connecting members 33a to 33h connect the upper chord member 31 and the lower chord member 32 to form a planar truss structure.

[0013] Returning to FIGS. 1 to 3, the trusses 13a to 13f will be further described. The trusses 13a to 13h have different spacings between the upper chords 31 and the lower chords 32. The upper chords 31 of the trusses 13a to 13h are arranged at approximately the same height in the height direction (±Z direction) and are supported by the columns 11a to 11d and the girders 12a and 12b. The lower chords 32 of the trusses 13a to 13h are arranged at different heights in the vertical direction, are supported by the connecting members 33a to 33h, and are spaced apart from the columns 11a to 11d and the girders 12a and 12b.

[0014] The small beams 15a to 15o are steel frames such as H-shaped steel, and are long members that extend substantially linearly in the same direction (±X direction) as the extension direction of the main beams 12a and 12b. The sub-joints 15a to 15c are bridged between the upper chord 31 of the truss 13a and the upper chord 31 of the truss 13b, fixed to the upper chord 31 of the truss 13a and 13b, and supported by the upper chord 31 of the truss 13a and 13b, connecting the truss 13a and the truss 13b. The sub-joints 15d to 15f are bridged between the upper chord 31 of the truss 13b and the upper chord 31 of the truss 13c, fixed to the upper chord 31 of the truss 13b and 13c, and supported by the upper chord 31 of the truss 13b and 13c, connecting the truss 13b and the truss 13c. The beams 15g to 15i are bridged between the upper chord 31 of the truss 13c and the upper chord 31 of the truss 13d, fixed to the upper chord 31 of the truss 13c and 13d, and supported by the upper chord 31 of the truss 13c and 13d, connecting the truss 13c and the truss 13d. The beams 15j to 15l are bridged between the upper chord 31 of the truss 13d and the upper chord 31 of the truss 13e, fixed to the upper chord 31 of the truss 13d and 13e, and supported by the upper chord 31 of the truss 13d and 13e, connecting the truss 13d and the truss 13e. The sub-beams 15m to 15o are spanned between the upper chord 31 of the truss 13e and the upper chord 31 of the truss 13f, fixed to the upper chord 31 of the truss 13e and 13f, and supported by the upper chord 31 of the truss 13e and 13f, connecting the truss 13e and the truss 13f.

[0015] The beams 14a to 14t are steel frames such as H-shaped steel beams, and extend in a direction (direction within the XZ plane) substantially perpendicular to the direction in which the trusses 13a to 13h extend (±Y direction). The beams 14a to 14t are not limited to being straight, and may be curved or broken, as in this example. The beams 14a to 14d are bridged between the lower chord member 32 of the truss 13a and the lower chord member 32 of the truss 13b, fixed to the lower chord members 32 of the truss 13a and 13b, and supported by the lower chord members 32 of the truss 13a and 13b, connecting the truss 13a and 13b. The beams 14a to 14d are arranged spaced apart in the same direction (±Y direction) as the extension direction of the truss 13a and 13b. The beams 14e to 14h are bridged between the lower chord member 32 of the truss 13b and the lower chord member 32 of the truss 13c, fixed to the lower chord members 32 of the truss 13b and 13c, and supported by the lower chord members 32 of the truss 13b and 13c, connecting the truss 13b and 13c. The beams 14e to 14h are arranged spaced apart in the same direction (±Y direction) as the extension direction of the truss 13b and 13c. The beams 14i to 14l are bridged between the lower chord member 32 of the truss 13c and the lower chord member 32 of the truss 13d, fixed to the lower chord members 32 of the truss 13c and 13d, and supported by the lower chord members 32 of the truss 13c and 13d, connecting the truss 13c and 13d. The beams 14i to 14l are arranged spaced apart in the same direction (±Y direction) as the extension direction of the truss 13c and 13d. The beams 14m to 14p are bridged between the lower chord 32 of the truss 13d and the lower chord 32 of the truss 13e, fixed to the lower chord 32 of the truss 13d and 13e, and supported by the lower chord 32 of the truss 13d and 13e, connecting the truss 13d and the truss 13e. The beams 14m to 14p are arranged spaced apart in the same direction (±Y direction) as the extension direction of the truss 13d and 13e. The beams 14q to 14t are bridged between the lower chord 32 of the truss 13e and the lower chord 32 of the truss 13f, fixed to the lower chord 32 of the truss 13e and 13f, and supported by the lower chord 32 of the truss 13e and 13f, connecting the truss 13e and 13f. The beams 14q to 14t are arranged spaced apart in the same direction (±Y direction) as the extension direction of the truss 13e and 13f.

[0016] The ceilings 16a and 16b are non-planar, for example curved, etc. There is a step between the ceilings 16a and 16b, and they are not continuous. The ceiling 16a is directly fixed to the joists 14a to 14l. The ceiling 16b is directly fixed to the joists 15i to 14t. In other words, the ceilings 16a and 16b are not suspended ceilings and have sufficient earthquake resistance without reinforcement.

[0017] The ceiling 16a will be described in detail with reference to Figure 6. The ceiling 16b is similar, so a detailed description will be omitted. The ceiling 16a includes, for example, a board 61, main bars 62a to 62e, and sub bars 63a to 63g.

[0018] The parent bars 62a to 62e are light steel frames such as lip channel steel, and are long members that extend substantially linearly and substantially parallel to the ±Y directions. The parent bars 62a to 62e are arranged spaced apart in a direction substantially perpendicular to the ±Y directions (direction within the XZ plane). The main bars 62a and 62b are fixed to the sub-beams 14a to 14d, for example. The main bars 62c and 62d are fixed to the sub-beams 14e to 14h, for example. The main bar 62e is fixed to, for example, the sub-beams 14i to 14l.

[0019] The secondary bars 63a to 63g are, for example, light steel frames such as so-called "M bars," and are long members that extend in a direction approximately perpendicular to the primary bars 62a to 62e. The secondary bars 63a to 63g are not limited to being linear, and may be curved as in this example. The secondary bars 63a to 63g are arranged below the primary bars 62a to 62e (in the -Z direction) and are fixed to the primary bars 62a to 62e.

[0020] The plate material 61 is, for example, a board such as a fiber-mixed gypsum board. The plate material 61 may be made up of multiple boards and is not limited to being flat, but may also be curved as in this example. The plate material 61 is disposed below the subsidiary bars 63a to 63g (in the -Z direction) and is fixed to the subsidiary bars 63a to 63g.

[0021] In this example, there is a step between the ceilings 16a and 16b, and they are spaced apart. Correspondingly, the joists 14i-14l, which are located at positions corresponding to the step between the ceilings 16a and 16b, have a broken line shape. Furthermore, the ceilings 16a and 16b have curved surfaces, and correspondingly, the joists 14a-14t have curved lines. That is, the joists 14a-14t have a shape that follows the shape of the ceiling 16a or 16b, and the distance between the joists 14a-14t and the plate material 61 of the ceiling 16a or 16b is constant. Therefore, for example, when using mounting brackets such as piece angles to attach the main bars 62a-62e to the joists 14a-14t, the shape of the mounting brackets can be unified.

[0022] Furthermore, because the ceilings 16a and 16b are fixed directly to the beams 14a to 14t, it is not a suspended ceiling structure and does not require earthquake reinforcement. This allows for a relatively large space to be secured above the ceiling, making it easy to install inspection walkways, ducts, etc. Furthermore, since it is not a suspended ceiling structure, the construction period can be shortened and high construction accuracy can be easily ensured.

[0023] The above-described embodiment is an example for facilitating understanding of the present invention. The present invention is not limited thereto, and includes various modifications, changes, additions, or omissions without departing from the scope defined by the appended claims. This can be easily understood by those skilled in the art from the above description.

[0024] Regarding the truss structure of the large hall, the beam configuration of the roof truss is planned to match the shape of the ceiling, which has a complex stepped ceiling. The lower chord of the truss directly supports the ceiling substrate. To avoid a suspended ceiling, a special ceiling (a place where people use it daily, with a height of over 6m and an area of ​​200m) was used. 2 Super, mass is 2kg / m 2 It does not fall under the category of a suspended ceiling (over 100 meters), so reinforcement is not required. Unlike constructing a suspended ceiling using suspension bolts from under the truss, construction is not complicated even in the case of a stepped ceiling such as in a large hall, and construction precision can be easily ensured. The height of the roof trusses is determined according to the shape of the ceiling. The ceiling underlayment is directly supported by the bottom chord of the trusses. This eliminates the need to hang the ceiling, shortening the construction period, making it easier to pass inspection walkways through the ceiling, and also making it easier to pass ducts and other equipment through the ceiling. [Explanation of symbols]

[0025] 10 Ceiling structure, 11a-11d columns, 12a, 12b main beams, 13a-13f trusses, 14a-14t, 15a-15o minor beams, 16a, 16b ceiling, 31 upper chord, 32 lower chord, 33a-33h connecting member, 61 plate, 62a-62e parent bar, 63a-63g child bar.

Claims

1. a plurality of planar trusses each having a substantially straight upper chord member, a substantially straight lower chord member disposed below the upper chord member and substantially parallel to the upper chord member, and a plurality of connecting members connecting the upper chord member and the lower chord member; a plurality of small beams connecting the bottom chords of the plurality of plane trusses; A ceiling directly fixed to the plurality of beams; Equipped with The plurality of plane trusses have different intervals between the upper chords and the lower chords, The plurality of small beams have a shape that follows the shape of the ceiling. Ceiling structure.

2. The plurality of planar trusses are arranged so that the upper chord members are at approximately the same position in the height direction. The ceiling structure of claim 1.

3. The ceiling has a curved surface shape, The plurality of joists are curved. The ceiling structure according to claim 1 or 2.

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