Ceiling structure

Abstract

To make a position of a ceiling material higher.SOLUTION: A ceiling structure 50 includes: a T bar 100 in which a suspension part 112 of a T-shaped leg part 110 is suspended from a slab 10 supported on a beam 30 by a suspension bolt 12 and is assembled in a lattice shape in plan view, and on which a ceiling material 20 is mounted; a beam lower part 130 in which the T-shaped leg part 110 is cut and formed and faces a lower flange 36 of the beam 30; and an inhibition mechanism 200 for inhibiting deflection of the beam lower part 130.SELECTED DRAWING: Figure 1

Description

[Technical Field]

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

[0002] Patent Document 1 discloses a technology relating to ceiling bars that are suspended via suspension means hanging from a ceiling slab and are connected to each other by connecting means to form a coplanar space for erecting ceiling panels. In this prior art, the ceiling bar is characterized by comprising a hollow rectangular section and a ceiling panel erection section that hangs down from the underside of the hollow rectangular section and has an inverted T-shaped cross section, with hanging pieces extending from the lower part of the side wall surface of the hollow rectangular section that engage with upper connecting means.

[0003] Patent Document 2 discloses a technique relating to a method and device for suspending and fixing ceiling components and the like from a ceiling slab using a wire. In this prior art ceiling suspension and fixing method using a ceiling component and a wire fixing fixture, one end of the wire is fixed to one surface of the ceiling slab-side fixture by an appropriate means, and the other end of the wire is brought into contact with a clamping portion of a clamping member engaged in an appropriate position above the main bar (T-bar) of the ceiling component, and after adjusting the height position, the end of the other end of the wire is fixed to the clamping member by a fixing means provided on the clamping portion.

[0004] Patent Document 3 discloses a technology related to a ceiling frame suspension structure in which a ceiling frame is suspended via a ceiling frame suspension member made of shaped steel or steel pipe from a horizontal member for attaching the ceiling frame to a specified ceiling substructure suspended from the building's structural body. In this prior art, a horizontal member for suspending the ceiling frame corresponding to the building's ceiling structure is provided on the ceiling substructure to which the ceiling frame is attached. The ceiling frame suspension structure also features a lattice-shaped ceiling frame consisting of rafters and rafter supports suspended from the horizontal member via the ceiling frame suspension member. The ceiling substructure horizontal member and the ceiling frame suspension member are each made of shaped steel or steel pipe with a predetermined cross-sectional shape and a predetermined outer diameter. The upper end of the ceiling frame suspension member is connected to the ceiling substructure horizontal member in a vertically intersecting manner via predetermined mounting hardware, and the ceiling frame is connected to the lower end of the ceiling frame suspension member in a crossing manner. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 5-171734 [Patent Document 2] Japanese Patent Application Laid-Open No. 2004-143798 [Patent Document 3] Japanese Patent Publication No. 2020-7882 Summary of the Invention [Problem to be solved by the invention]

[0006] The T-bar to which the ceiling material is attached is suspended from a slab supported by beams by connecting a suspension bolt to the T-shaped leg of the T-bar. For this reason, the T-bar needs to be lowered below the bottom of the beam so that the T-shaped leg of the T-bar does not interfere with the bottom of the beam. Therefore, there is a limit to how high the ceiling material can be placed.

[0007] In view of the above, an object of the present invention is to raise the position of a ceiling material. [Means for solving the problem]

[0008] The first aspect is a ceiling structure comprising a T-bar whose T-shaped legs are suspended from a slab supported by beams by hanging bolts, and which is arranged in a parallel or lattice pattern in a plan view and to which ceiling material is attached; a lower part of the beam formed by cutting the T-shaped legs and facing the lower end of the beam; and a restraint mechanism that restrains deflection of the lower part of the beam.

[0009] In the ceiling structure of the first embodiment, the lower end of the beam faces the lower part of the beam, which is formed by cutting the T-shaped legs of the T-bar. Therefore, the position of the T-bar can be raised by the amount of the T-shaped legs cut off. Also, since the lower part of the beam of the T-bar is formed by cutting the T-shaped legs, it has less rigidity than other parts, but deflection is suppressed by the suppression mechanism. Therefore, the position of the ceiling material attached to the T-bar is raised while suppressing deflection of the T-bar.

[0010] A second aspect is the ceiling structure according to the first aspect, wherein the restraint mechanism has a reinforcing member joined to the lower part of the beam.

[0011] In the ceiling structure of the second embodiment, the lower part of the beam in the T-bar is increased in rigidity by joining a reinforcing member, and deflection is suppressed.

[0012] A third aspect is a ceiling structure according to the first or second aspect, in which the restraint mechanism has a suspension mechanism that suspends the lower part of the beam from the lower end of the beam so as to be movable horizontally.

[0013] In the third aspect, the restraining member is such that the lower beam portion of the T-bar is suspended from the lower end of the beam so as to be horizontally movable, thereby restraining deflection of the lower beam portion. [Effects of the Invention]

[0014] According to the present invention, the ceiling material can be made higher. [Brief explanation of the drawings]

[0015] [Figure 1]FIG. 2 is a side view of a ceiling structure according to one embodiment of the present invention, viewed from the Y direction. [Figure 2] FIG. 2 is an enlarged side view of the main part of FIG. [Figure 3] 1 is an enlarged front view of a ceiling structure according to an embodiment of the present invention, viewed from the X direction. [Figure 4] (A) is a view from the longitudinal direction of a T-bar used in the ceiling structure of one embodiment of the present invention, (B) is a view from the longitudinal direction of the lower part of the beam formed by cutting the upper side of the T-bar, (C) is a view of a reinforcing plate joined to the lower part of the beam, and (D) is a view of an L-shaped reinforcing material joined to the lower part of the beam. [Figure 5] This is a side view of the main parts of the restraint mechanism of the ceiling structure of one embodiment of the present invention, viewed from the Y direction. [Figure 6] 1 is a front view of a main part of a suppression mechanism of a ceiling structure according to an embodiment of the present invention, viewed from the X direction. DETAILED DESCRIPTION OF THE INVENTION

[0016] First Embodiment A ceiling structure according to a first embodiment of the present invention will be described. Two directions perpendicular to the horizontal direction are referred to as the X direction and the Y direction, and are indicated by the arrows X and Y, respectively. The vertical direction perpendicular to the X direction and the Y direction is referred to as the Z direction, and is indicated by the arrow Z. Furthermore, the view from the Y direction is referred to as the side, and the view from the X direction is referred to as the front.

[0017] [structure] First, the specific structure of the ceiling structure of this embodiment will be described.

[0018] As shown in Fig. 1, the ceiling structure 50 of this embodiment is a system ceiling in which ceiling materials 20 (see Fig. 3) and lighting fixtures (not shown) are attached to T-bars 100 suspended from a slab 10 and arranged in a grid pattern. Fig. 1 and Fig. 2 (described later) show a state in which the ceiling materials 20 (see Fig. 3) and the like are not attached. Braces may also be joined between the slab 10 and the T-bars 100, between the suspension bolts 12 (described later), and so on.

[0019] As shown in Figures 3 and 4(A), T-bar 100 is a long member whose cross section perpendicular to the longitudinal direction is a generally inverted T shape, and is composed of a T-leg portion 110 and a T-head portion 120. T-leg portion 110 is composed of a hanging portion 112 with a rectangular frame-shaped cross section that forms the upper end of T-bar 100, and a vertical plate portion 114 that extends downward from hanging portion 112. The T-head portion 120 has an upper end connected to vertical plate portion 114, and is a rail-like portion with a rectangular frame-shaped cross section that is open at the bottom.

[0020] The longitudinal direction of the T-bars 100 in each figure is along the X direction. However, as mentioned above, the T-bars 100 are arranged in a grid pattern along the X and Y directions in a plan view. Therefore, although not shown, T-bars 100 whose longitudinal direction is along the Y direction are also provided.

[0021] 3, a ceiling material 20 and lighting fixtures (not shown) are attached to a T-shaped head 120 of the T-bar 100. The lower surface of the ceiling material 20 is a ceiling surface 22.

[0022] In this embodiment, the T-bar 100 is made of metal and is formed by folding a thin steel plate in half and forming each section into a predetermined shape, but is not limited to this. The material and manufacturing method of the T-bar 100 can be selected appropriately depending on the installation location and the weight of the supported objects such as the ceiling material 20 and lighting fixtures (not shown).

[0023] As shown in FIG. 1, the slab 10 is supported on a beam 30. The beam 30, indicated by an imaginary line (chain double-dashed line), will be described later. The slab 10 in this embodiment is made of reinforced concrete. The beam 30 in this embodiment is made of an H-shaped steel having an upper flange 32, a web 34, and a lower flange 36. However, the slab 10 and the beam 30 are not limited to these.

[0024] The T-bar 100 of this embodiment is assembled in a lattice shape in plan view using joints, screws, etc., as described above. The T-bar 100 is suspended by hanging bolts 12 fixed to the slab 10. As shown in FIGS. 1 and 2, specifically, hanging hardware 42 is provided at the lower end of the hanging bolt 12, and this hanging hardware 42 grips the hanging portion 112 at the upper end of the T-shaped leg 110 of the T-bar 100 (see also FIG. 3). The auxiliary hanging bolts 14 and auxiliary hanging hardware 44 will be described later. Here, as shown in FIG. 3, the hanging hardware 42 of this embodiment grips the hanging portion 112 by bolting the upper end of the gripping portion 43 to the hanging hardware main body 41, but the present invention is not limited to this.

[0025] 1 and 2, the portion of the T-bar 100 that faces the lower flange 36, which is the lower end of the beam 30, is the beam lower portion 130. The beam lower portion 130 is formed by cutting the vertical plate portion 114 of the T-leg portion 110 of the T-bar 100 midway at the portion that interferes with the lower flange 36 of the beam 30, thereby partially shortening the vertical length of the T-bar 100. In other words, the upper side of the T-bar 100 (the upper side of the hanging portion 112 and vertical plate portion 114) is notched and cut, and the remaining lower portion (the lower side of the vertical plate portion 114 and the T-head portion 120) is the beam lower portion 130.

[0026] From another perspective, the T-bar 100 has a recess 138 formed by cutting out the upper side that interferes with the lower flange 36 of the beam 30, and the part that forms the bottom of this recess 138 is the lower beam part 130.

[0027] 4(B) shows the shape of the beam lower portion 130 as viewed from the longitudinal direction. FIG. 4(B) illustrates a state in which a reinforcing plate 210 (see FIG. 4(C)) described below has not yet been joined.

[0028] In this embodiment, the vertical plate portion 114 of the T-shaped leg portion 110 of the pre-fabricated T-bar 100 that interferes with the lower flange 36 of the beam 30 is cut midway to partially shorten the vertical length of the T-bar 100, thereby forming the beam lower portion 130. However, this is not limited to this, and a new T-bar 100 with the beam lower portion 130 formed thereon may also be produced.

[0029] 1 and 2, the lower flange 36 of the beam 30 is disposed directly above and facing the lower beam part 130 of the T-bar 100 (see also FIGS. 5 and 6). When viewed from the longitudinal direction of the T-bar 100, the lower flange 36 overlaps with the hanging parts 112 on both longitudinal sides of the lower beam part 130 of the T-bar 100 (on both longitudinal sides of the recess 138). From another perspective, the lower flange 36 of the beam 30 is contained within the recess 138 of the T-bar 100.

[0030] 1 and 2, in this embodiment, the vicinity of both longitudinal sides of the beam lower portion 130 of the T-bar 100 (both sides of the recess 138) is suspended from auxiliary suspension bolts 14 fixed to the slab 10 (see FIG. 1). Specifically, auxiliary suspension fittings 44 are provided at the lower ends of the auxiliary suspension bolts 14, and these auxiliary suspension fittings 44 grip the suspension portion 112 of the T-bar 100. More specifically, the auxiliary suspension fitting 44 is composed of a pair of gripping plate portions 48 arranged along the vertical direction and spaced apart in the horizontal direction, and a connecting portion 46 connecting the pair of gripping plate portions 48 and the auxiliary suspension bolts 14.

[0031] The lower beam section 130 of the T-bar 100 is prone to bending due to a reduction in rigidity caused by the cutting of the upper section, so a suppression mechanism 200 is provided to suppress bending. The suppression mechanism 200 has a reinforcing plate 210 and a hanging mechanism 220.

[0032] As shown in Fig. 4(C), a reinforcing plate 210, as an example of a reinforcing member, is joined to both sides of the vertical plate portion 114 of the beam lower portion 130 of the T-bar 100 with adhesive, bolts, or the like. In this embodiment, the reinforcing plate 210 is joined to the entire longitudinal area of ​​the beam lower portion 130, but this is not limited thereto. The reinforcing plate 210 may also be joined to only a portion of the longitudinal area of ​​the beam lower portion 130.

[0033] 5 and 6, the suspension mechanism 220 is configured to have a bar-side elongated hole 222 (see FIG. 5), a beam-side elongated hole 224 (see FIG. 6), and a wire 226 as an example of a suspension material. The bar-side elongated hole 222 (see FIG. 5) and the beam-side elongated hole 224 (see FIG. 6) are orthogonal in plan view. In this embodiment, the bar-side elongated hole 222 (see FIG. 5) is an elongated hole that is long in the longitudinal direction of the T-bar 100 (X direction in the figure), and the beam-side elongated hole 224 (see FIG. 6) is an elongated hole that is long in a direction (Y direction) that is orthogonal to the longitudinal direction of the T-bar 100 in plan view.

[0034] The beam-side elongated hole 224 is formed in an L-shaped hanging plate metal fitting 230 that is joined by welding or the like to the underside 37 of the lower flange 36 of the beam 30. In this embodiment, the hanging plate metal fittings 230 are provided on both sides in the X direction below the web 34 of the beam 30. The bar-side elongated hole 222 is formed in the vertical plate portion 114 of the beam lower portion 130 of the T-bar 100 and in the reinforcing plate 210 joined to this vertical plate portion 114. The bar-side elongated hole 222 is formed in a position below the hanging plate metal fitting 230.

[0035] The wire 226 is passed through the bar-side elongated hole 222 and the beam-side elongated hole 224, and the ends are joined to form a loop. The wire 226 is adjusted to a length that allows for a state in which the beam lower portion 130 is suspended from the lower flange 36 of the beam 30 by the wire 226, or a slight slack in the suspended state. Also, as mentioned above, the bar-side elongated hole 222 and the beam-side elongated hole 224 (see Figure 6) are perpendicular in plan view. Therefore, the T-bar 100 is suspended from the beam 30 by the wire 226, but is movable horizontally (in the X and Y directions) relative to the beam 30.

[0036] [Action and effect] Next, the operation and effects of this embodiment will be described.

[0037] In the ceiling structure 50 of this embodiment, the lower flange 36 of the beam 30 faces the lower beam part 130 formed by cutting the T-shaped leg part 110 of the T-bar 100. Therefore, the vertical position of the T-bar 100 is higher by the amount of the T-shaped leg part 110 of the T-bar 100 cut. In other words, when viewed from the longitudinal direction of the T-bar 100, the lower flange 36 of the beam 30 overlaps with the hanging parts 112 on both longitudinal sides of the lower beam part 130 of the T-bar 100 (on both longitudinal sides of the recess 138). From another perspective, the lower flange 38 of the beam 30 is contained within the recess 138 of the T-bar 100. By raising the vertical position of the T-bar 100 in this way, the vertical position of the ceiling material 20 (ceiling surface 22) attached to the T-bar 100 is raised.

[0038] Here, the rigidity of the beam lower portion 130 of the T-bar 100 is reduced by the amount of cutting, but the bending of the beam lower portion 130 is suppressed by the suppression mechanism 200.

[0039] First, by joining the reinforcing plates 210 to both sides of the vertical plate portion 114 of the beam lower portion 130, the rigidity of the beam lower portion 130 is increased and deflection is suppressed.

[0040] Furthermore, since the lower beam portion 130 of the T-bar 100 is suspended from the lower flange 36 of the beam 30 by the suspension mechanism 220, deflection of the lower beam portion 130 is suppressed. As described above, the T-bar 100 is suspended from the beam 30, but is also movable horizontally (in the X and Y directions) relative to the beam 30. Therefore, even during an earthquake or the like, the T-bar 100 (ceiling material 20) can move (sway) horizontally, thereby suppressing damage caused by stress concentration around the hole through which the wire 226 is passed in the vertical plate portion 114 of the lower beam portion 130. Furthermore, in this embodiment, since the reinforcing plates 210 are also joined to both sides around the bar-side elongated hole 222, damage is suppressed even if stress is applied around the bar-side elongated hole 222.

[0041] Furthermore, in this embodiment, the T-bar 100 is suspended by the auxiliary suspension bolts 14 at the suspension portions 112 on both longitudinal sides of the beam lower portion 130 (on both longitudinal sides of the recess 138). Therefore, deflection of the beam lower portion 130 is further suppressed.

[0042] Therefore, while suppressing bending of the T-bar 100, the position of the T-bar 100 in the vertical direction can be increased, and the position of the ceiling material 20 (ceiling surface 22) attached to the T-bar 100 can also be increased in the vertical direction.

[0043] [Renovation work] Here, an example in which the ceiling structure 50 of this embodiment is applied to renovation work on the ceiling portion will be described.

[0044] The beam 30 shown by the imaginary line (two-dot chain line) in Figure 1 represents the normal level position of the beam 30 in the vertical direction. However, due to the construction accuracy of the steel frame at the time of new construction, deterioration over time, etc., the beam 30 may be lower than the normal level, as shown by the solid line. In this case, in a conventional ceiling structure, the T-bar 100 needs to be lowered below the lower flange 36 of the beam 30 so that it does not interfere with the lower flange 36 of the beam 30, and therefore the vertical position (height from the floor surface, not shown) of the ceiling material 20 (ceiling surface 22) attached to the T-bar 100 becomes lower.

[0045] However, by applying the ceiling structure 50 of this embodiment to renovation work, even if the position of the lower flange 36 of the beam 30 is lower than the normal level, the T-bar 100 can be raised by the amount of the T-shaped leg 110 cut off. This makes it possible to raise the position of the ceiling material 20 assembled to the T-bar 100. This makes it possible to bring the ceiling material 20 to a normal level or close to a normal level.

[0046] [Variations] Next, modified examples of reinforcing members for increasing the rigidity of the beam lower portion 130 of the T-bar 100 will be described.

[0047] 4(D) is made of metal and has an L-shaped cross section. Specifically, it has a vertical plate reinforcing portion 312 joined to the vertical plate portion 114, and a flange portion 310 extending laterally from the upper end of the vertical plate reinforcing portion 312.

[0048] In this way, the L-shaped reinforcing member 300 of the modified example has an L-shaped cross section and is more rigid than the reinforcing plate 210 shown in Figure 4(C), so the rigidity of the joined beam lower part 130 is also increased, and deflection is further suppressed.

[0049] The flange portion 310 is formed with a long hole through which the wire 226 (see FIGS. 5 and 6) can move.

[0050] <Other> The present invention is not limited to the above embodiment.

[0051] For example, in the above embodiment and modified example, the suppression mechanism 200 that suppresses deflection of the beam lower portion 130 includes the reinforcing plate 210 or the L-shaped reinforcing member 300, and the hanging mechanism 220, but is not limited to this. The suppression mechanism 200 may include only one of the reinforcing plate 210 or the L-shaped reinforcing member 300, and the hanging mechanism 220.

[0052] Furthermore, although the reinforcing plate 210 or the L-shaped reinforcing member 300 is joined to both sides of the vertical plate portion 114 of the beam lower portion 130, this is not limited to this. It may also be joined to only one side of the vertical plate portion 114 of the beam lower portion 130. Furthermore, a reinforcing member other than the reinforcing plate 210 or the L-shaped reinforcing member 300 may be used. For example, it may be a reinforcing member having a U-shaped cross section, or a reinforcing member having an H-shaped cross section. Alternatively, it may be a reinforcing member having a cylindrical cross section such as a rectangular frame shape, or a rod-shaped reinforcing member having a square cross section.

[0053] Furthermore, the configuration of the hanging mechanism 220 in the above embodiment is merely an example and is not limited to this. For example, a metal fitting may be attached to the lower beam portion 130, and the bar-side elongated hole 222 may be formed in this metal fitting. Furthermore, the shape of the hanging metal fitting 230 and the method of fixing it to the lower flange 36 of the beam 30 are merely examples, and these can be selected appropriately depending on the ease of construction, etc.

[0054] Furthermore, in the above embodiment, the hanging metal plate 230 is provided in two locations on both sides in the X direction below the web 34 of the beam 30, but this is not limited to this. It may be provided in one location, or in three or more locations. Also, a hanging material other than the wire 226, for example, a hanging material made of resin, may be used. In short, the hanging mechanism may be any mechanism that hangs the lower part of the beam on the T-bar from the lower end of the beam.

[0055] In addition, for example, in the above embodiment, the lower beam portion 130 is formed by cutting the vertical plate portion 114 of the T-shaped leg portion 110 of the T-bar 100 at a portion where it interferes with the lower flange 36 of the beam 30, but this is not limited to this. It is also possible to cut only the hanging portion 112 and leave the entire vertical plate portion 114.

[0056] Furthermore, for example, the overall shape of the T-bar 100 in the above embodiment is merely an example and is not limited thereto. The T-bar is a long member whose cross section perpendicular to the longitudinal direction is roughly inverted T-shaped, and it may have any shape as long as it can be hung from a hanging bolt and can be attached to a ceiling material.

[0057] In addition, for example, in the above embodiment, the T-bar 100 is a grid type that is arranged in a grid pattern in a plan view, but this is not limited to this. For example, it may be a line type in which T-bars are arranged in parallel (arranged in the same direction).

[0058] Furthermore, the present invention can be embodied in various forms without departing from the spirit of the present invention. [Explanation of symbols]

[0059] 10 Slabs 12 Hanging bolt 20 Ceiling materials 30 Beam 36 Lower flange (example of lower end) 50 Ceiling structure 100 T-bar 110 T leg 130 Beam lower part 200 Suppression mechanism 210 Reinforcing plate (an example of a reinforcing member) 220 Hanging mechanism 300 L-shaped reinforcement material (an example of a reinforcement material)

Claims

1. T-bars, whose T-shaped legs are suspended by hanging bolts from a slab supported by beams, are arranged in parallel or in a grid pattern in plan view, and to which ceiling materials are attached; The T-shaped leg portion is cut to form a beam lower portion facing the lower end portion of the beam; a suppression mechanism for suppressing deflection of the lower portion of the beam; A ceiling structure equipped with

2. The suppression mechanism is A reinforcing member is joined to the lower part of the beam. The ceiling structure according to claim 1 .

3. The suppression mechanism is A suspending mechanism is provided to horizontally move the lower part of the beam from the lower end of the beam. The ceiling structure according to claim 1 or 2.

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