JP7611525B2 - System ceiling - Google Patents

Description

The present disclosure relates to a system ceiling, and more particularly, to a system ceiling including a T- bar.

As a conventional example, the system ceiling described in Patent Document 1 is exemplified. The system ceiling described in Patent Document 1 has a first T-bar, a second T-bar, and a joiner that joins the first T-bar and the second T-bar. In the system ceiling described in Patent Document 1, the end of the second T-bar is joined to the side of the first T-bar via the joiner.

JP 2018-3364 A

However, at system ceiling construction sites, there is a demand for further simplification of construction work for the system ceiling and T-bars (first T-bar, second T-bar) described in Patent Document 1, which use joiners.

An object of the present disclosure is to provide a system ceiling that can further simplify installation work.

A system ceiling according to an embodiment of the present disclosure has a plurality of types of T-bars. The plurality of types of T-bars include a plurality of main T-bars installed in parallel at a certain interval, and a plurality of first cross T-bars connected to the plurality of main T-bars so as to intersect with the plurality of main T-bars. The system ceiling has a plurality of second cross T-bars connected to the plurality of first cross T-bars so as to intersect with the plurality of first cross T-bars and to be parallel to the plurality of main T-bars. The plurality of types of T-bars including the main T-bar, the first cross T-bar, and the second cross T-bar each have a long main body, a first coupling portion provided at both ends of the main body in the longitudinal direction, and a plurality of second coupling portions provided on the side of the main body, the second coupling portions being provided at the ends of other T-bars intersecting with the T-bars and capable of being coupled to a coupling portion having the same structure as the first coupling portion. The main body has a main portion that is a long flat plate. The second coupling portion has a semi-cylindrical insertion portion protruding from a side surface of the main body and a protruding piece protruding from the side surface of the main body in the same direction as the insertion portion. The first coupling portion has a mating piece provided on the side surface of the main body of another T-bar intersecting with the T-bar and inserted into the insertion portion of a coupling portion having the same structure as the second coupling portion. A groove is provided at the tip of the mating piece, and a protruding piece of a coupling portion having the same structure as the second coupling portion, provided on the side surface of the main body of another T-bar intersecting with the T-bar, is fitted into the groove.

The system ceiling of the present disclosure has the advantage of being able to further simplify installation work.

FIG. 1 is a perspective view of a ceiling frame of a system ceiling according to an embodiment of the present disclosure, viewed obliquely from above. FIG. 2 is a perspective view of the ceiling frame as viewed obliquely from below. FIG. 3 is a perspective view of the above system ceiling as viewed from below. FIG. 4 is a perspective view of a T-bar (first cross T-bar) according to an embodiment of the present disclosure. 5A is a front view of the first cross T-bar, FIG. 5B is a bottom view of the first cross T-bar, and FIG. 5C is an enlarged view of the part surrounded by the dashed line in FIG. 5B. FIG. 6 is a side view of the first cross T-bar. FIG. 7 is a perspective view of the joint between the first cross T-bar and the main T-bar as viewed from above. FIG. 8 is a perspective view showing the joint between the first cross T-bar and the main T-bar from below. FIG. 9 is a perspective view of the first cross T-bar and the main T-bar before they are joined together, as viewed from above. FIG. 10 is a perspective view of the first cross T-bar and the main T-bar before they are joined together, as viewed from below. FIG. 11 is a bottom view of the joint between the first cross T-bar and the main T-bar. FIG. 12 is a bottom view of the joint between the first cross T-bar and the second cross T-bar.

The T-bar and system ceiling according to the embodiments of the present disclosure will be described in detail below with reference to the drawings. However, each figure described in the following embodiments is a schematic diagram, and the ratio of the size and thickness of each component does not necessarily reflect the actual dimensional ratio. Note that the configuration described in the following embodiments is merely one example of the present disclosure. The present disclosure is not limited to the following embodiments, and various modifications are possible depending on the design, etc., as long as the effects of the present disclosure can be achieved.

(Overview of the system ceiling according to the embodiment)
A system ceiling 1 according to the embodiment (hereinafter, abbreviated as system ceiling 1) has a plurality of T-bars connected in a lattice shape, and a plurality of ceiling panels 12 formed in a quadrilateral flat plate shape, each of whose four sides is supported by a plurality of T-bars, as shown in Figures 1 to 3. The system ceiling 1 also has a plurality of types of equipment, such as lighting fixtures 5 and air conditioning outlets (see Figure 3).

The multiple T-bars include multiple main T-bars 2, multiple first cross T-bars 3, and multiple second cross T-bars 4 (see Figures 1 and 2).

The multiple main T-bars 2 are supported by multiple suspension bolts 11 so that they are arranged parallel to each other with a fixed distance D1 between them. Specifically, each main T-bar 2 is connected to each of the multiple suspension bolts 11 embedded in the ceiling slab of the building by multiple T-hangers 10 attached to each of the multiple suspension bolts 11. Each of the multiple T-hangers 10 is screwed to a corresponding one of the multiple suspension bolts 11, and is attached to the main T-bar 2 so as to sandwich the upper end (main portion 21) of the main T-bar 2 from its width direction.

The multiple first cross T-bars 3 each cross (orthogonally) the multiple main T-bars 2 and are supported by the two main T-bars 2 so that they are aligned parallel to each other with a constant distance D2 (D2 = D1/2) between them.

The multiple second cross T-bars 4 are each connected to two first cross T-bars 3 so as to be parallel to the multiple main T-bars 2 and intersect (orthogonal) with the multiple first cross T-bars 3. Note that the basic structure of these three types of T-bars is the same, so the basic structure of the first cross T-bar 3, which represents the three types of T-bars, will be explained with reference to Figures 4 to 6.

The first cross T-bar 3 has a main body 30, a main portion 31, and a bottom portion 32 as a basic structure. The main body 30 is formed in a long flat plate shape. The main portion 31 is formed in a hollow rectangular prism shape with both ends in the longitudinal direction open. The main portion 31 is connected to the upper end of the main body 30 in the lateral direction (up and down direction) at the center of the lateral direction of the lower surface (see FIG. 6). The bottom portion 32 is formed in a hollow rectangular prism shape as a whole, and is connected to the lower end of the main body 30 in the lateral direction at the center of the lateral direction of the upper surface. However, a rectangular opening 320 is provided along the longitudinal direction of the bottom portion 32 at the center of the lateral direction of the lower surface of the bottom portion 32 (see FIG. 6). The ends 322 on both sides in the longitudinal direction of the bottom portion 32 are each formed in a trapezoid shape inclined at an angle of 45° toward the longitudinal tip of the bottom portion 32 and approaching the opening 320 (see FIG. 5B). In the following description, the body, main part, bottom part and opening part of the main T-bar 2 are respectively referred to as body 20, main part 21, bottom part 22 and opening part 220. Similarly, the body, main part, bottom part, opening part and bottom end part of the second cross T-bar 4 are respectively referred to as body 40, main part 41, bottom part 42, opening part 420 and bottom end part 422.

Each of the ceiling panels 12 is formed into a square (or rectangular) flat plate shape using a plate material such as gypsum board or wood (see FIG. 3). The four sides of the ceiling panel 12 have a step along the thickness direction (up and down direction) of the ceiling panel 12. In the following description, the part of the periphery of the ceiling panel 12 that is narrower in the thickness direction than the central part of the ceiling panel 12 due to the step of each side of the ceiling panel 12 is called the peripheral part. Each ceiling panel 12 is inserted into a square (or rectangular) hole surrounded by four T bars (one main T bar 2, two first cross T bars 3, and one second cross T bar 4), and is supported by the four T bars so that the peripheral parts of the edges of the four sides are placed on the bottom parts of the four T bars surrounding the hole. In other words, the hole surrounded by the four T bars is blocked by the ceiling panel 12 (see FIG. 3). However, in some cases, instead of the ceiling panel 12, lighting fixtures, air conditioning vents, and other equipment are inserted into the holes and supported by the four T-bars.

(Description of T-bar according to embodiment)
The T-bar according to the embodiment of the present disclosure is a first cross T-bar 3 among three types of T-bars.

In addition to the basic structure described above, the first cross T-bar 3 has a pair of first connecting parts 33, one on each end of the longitudinal direction of the main body 30, and a plurality of second connecting parts 34, which are provided on the side of the main body 30 and can be connected to the first connecting parts 33 (Figure 4). However, the pair of first connecting parts 33 of the first cross T-bar 3 are each connected to the second connecting parts 24 (connecting parts having the same structure as the second connecting parts 34 of the first cross T-bar 3) of the main T-bar 2 (see Figures 7 and 8). Similarly, the plurality of second connecting parts 34 of the first cross T-bar 3 are each connected to the first connecting parts 43 (connecting parts having the same structure as the first connecting parts 33 of the first cross T-bar 3) of the second cross T-bar 4 (see Figure 1).

The first connecting portion 33 has a rectangular fixing piece 330 and an engagement piece 331 that protrudes from one side of the fixing piece 330 in the thickness direction of the fixing piece 330. The first connecting portion 33 has a pair of eyelets 332 that protrude from the surface of the fixing piece 330 in the thickness direction of the fixing piece 330 (see FIG. 6). The pair of eyelets 332 are formed into an annular shape by drawing (burring). A pair of through holes that penetrate the main body 30 in the thickness direction are provided at both ends of the longitudinal direction of the main body 30. The fixing piece 330 is connected to the main body 30 by crimping the tips of the pair of eyelets 332 that are inserted one by one into a pair of through holes of the main body 30 (see FIG. 6).

The mating piece 331 is formed in a U-shape (see FIG. 6). A rectangular hole 333 penetrates the tip of the mating piece 331. A groove 334 is formed at the tip of the mating piece 331. The groove 334 is formed so that it opens toward the tip of the mating piece 331.

However, the fixed piece 330 of one of the pair of first connecting parts 33 is connected to one side of the main body 30, and the fixed piece 330 of the other first connecting part 33 is connected to the opposite side of the main body 30 (see FIG. 6). Therefore, the mating pieces 331 of each of the pair of first connecting parts 33 protrude in opposite directions from the main body 30 (see FIG. 6).

The second coupling portion 34 has an insertion portion 340, a protrusion 341, and a protruding piece 342 (see FIG. 6). The insertion portion 340 is formed in a semi-cylindrical shape protruding from the side surface of the main body 30 in the thickness direction of the main body 30. The protrusion 341 is formed in a semi-cylindrical shape protruding from the side surface of the main body 30 in the same direction as the insertion portion 340. The protrusion 342 is cut and raised so as to protrude from the side surface of the main body 30 in the same direction as the insertion portion 340, for example, at an angle of 90°. The insertion portion 340, the protrusion 341, and the protrusion 342 are arranged in a straight line along the longitudinal direction of the main body 30, and are arranged so that the protrusion 341 is sandwiched between the insertion portion 340 and the protrusion 342 (see FIG. 4). The second joint 24 of the main T-bar 2 has the same structure (insertion portion 240, protrusion 241, and protruding piece 242) as the second joint 34 of the first cross T-bar 3 (see Figures 7 and 8).

Here, in the first cross T-bar 3, two second joints 34 are provided at each of the longitudinal center of the main body 30 and the position between the longitudinal end 322 and the longitudinal center of the main body 30 (see Figures 4 and 5B). However, the two second joints 34 at the center are provided on both sides in the thickness direction of the main body 30. Similarly, the two second joints 34 between the end 322 and the center are provided on both sides in the thickness direction of the main body 30 (see Figures 4 and 5B).

Furthermore, two notches 321 are provided in the bottom 32 of the first cross T-bar 3 (see Figures 4 and 5A-5C). Each notch 321 is formed by cutting out both sides of the opening 320 in the bottom surface (lower surface) of the bottom 32 into a trapezoidal shape inclined at an angle of 45°. However, one notch 321 is provided in the center position in the longitudinal direction of the bottom 32, and the remaining notch 321 is provided in a position between one end of the bottom 32 in the longitudinal direction and the center position. In other words, the two notches 321 are each provided in a position corresponding to the second joint 34 in the longitudinal direction of the bottom 32.

(Installation procedure of the system ceiling according to the embodiment)
Next, the construction procedure for the system ceiling 1 will be briefly described.

First, the worker performing the construction work connects the main portion 21 of the main T-bar 2 to the hanging bolt 11 via the T-hanger 10, thereby constructing multiple main T-bars 2 so that they are arranged parallel to each other with a certain distance D1 between them (see Figures 1 and 2).

Next, the worker connects the first connecting portion 33 of the first cross T-bar 3 to the second connecting portion 24 of the main T-bar 2. Specifically, the worker inserts the mating piece 331 of the first connecting portion 33 of the first cross T-bar 3 into the insertion portion 240 of the second connecting portion 24 of the main T-bar 2 (see Figures 9 and 10). At this time, the worker engages the protrusion 241 of the second connecting portion 24 with the hole 333 of the mating piece 331, and fits the protrusion 242 of the second connecting portion 24 into the groove 334 of the mating piece 331 (see Figures 7 and 8). Thus, the protrusion 241 of the second connecting portion 24 engages with the hole 333 of the mating piece 331, preventing the mating piece 331 from coming off the insertion portion 240. In addition, the protrusion 242 of the second coupling part 24 is fitted into the groove 334 of the mating piece 331, thereby positioning the first coupling part 33 and the second coupling part 24.

Here, the bottom 22 of the main T-bar 2 is provided with a notch 221 of the same shape as the notch 321 provided in the bottom 32 of the first cross T-bar 3 (see FIG. 10). Therefore, when the second joint 24 of the main T-bar 2 and the first joint 33 of the first cross T-bar 3 are joined, the end 322 of the first cross T-bar 3 engages with the notch 221 in the bottom 22 of the main T-bar 2 (see FIG. 8). As a result, the opening 320 in the bottom 32 of the first cross T-bar 3 and the opening 220 in the bottom 22 of the main T-bar 2 are connected. Therefore, the first cross T-bar 3 can improve the appearance of the system ceiling 1 by connecting the openings 220, 320 of both the main T-bar 2 and the first cross T-bar 3, compared to when the openings 220, 320 are divided at the joint between the main T-bar 2 and the first cross T-bar 3.

Next, the worker attaches two second cross T-bars 4 to one first cross T-bar 3. That is, the worker places two second cross T-bars 4 between two main T-bars 2 by connecting one first connection portion 43 of the second cross T-bar 4 to each of the two second connection portions 34 of the first cross T-bar 3 (see Figure 1).

Here, when the second joint 34 of the first cross T-bar 3 and the first joint 43 of the second cross T-bar 4 are joined, the end 422 of the second cross T-bar 4 engages with the notch 321 of the bottom 32 of the first cross T-bar 3 (see FIG. 12). As a result, the opening 320 of the bottom 32 of the first cross T-bar 3 and the opening 420 of the bottom 42 of the second cross T-bar 4 are connected. Therefore, the first cross T-bar 3 can improve the external appearance of the system ceiling 1 by connecting the openings 420, 320 of both the second cross T-bar 4 and the first cross T-bar 3, compared to when the openings 420, 320 are divided at the joint between the second cross T-bar 4 and the first cross T-bar 3.

Finally, the worker fits the ceiling panel 12 and lighting fixtures 5 (equipment) into the multiple holes in the ceiling frame, which is made by combining three types of T-bars (main T-bar 2, first cross T-bar 3, and second cross T-bar 4) in a lattice pattern (see Figure 3). This completes the installation of the system ceiling 1.

(Features of the T-bar and system ceiling according to the embodiment)
One feature of the T-bar (first cross T-bar 3) according to the embodiment is that it has a long main body 30, first connecting portions 33 provided at both ends of the main body 30 in the longitudinal direction, and a plurality of second connecting portions 34 provided on the side of the main body 30 and connectable to the first connecting portions 33. The first connecting portions 33 of the first cross T-bar 3 have the same configuration as the second connecting portions 34 and are connected to the second connecting portions 24 provided on the main T-bar 2. The second connecting portions 34 of the first cross T-bar 3 are connected to the first connecting portions 43 provided on the second cross T-bar 4 and have the same configuration as the first connecting portions 33.

Therefore, the first cross T-bar 3 can be directly connected to the main T-bar 2 and the second cross T-bar 4, which further simplifies the construction work compared to the conventional configuration in which a joiner is used for connection. And the system ceiling 1 including the first cross T-bar 3 can also further simplify the construction work.

Here, two types of conventional system ceilings are provided: the so-called grid type and line type. The grid type system ceiling is configured by combining multiple T bars in a lattice pattern, and installing square ceiling panels and equipment such as lighting fixtures in the square holes separated by the T bars. On the other hand, the line type system ceiling is configured by installing multiple T bars side by side in the same direction, and installing ceiling panels and equipment such as lighting fixtures in rectangular holes separated by parallel T bars. And, conventionally, only one type of system ceiling, either the grid type or the line type, could be constructed, so the types of equipment that can be installed (such as lighting fixtures and air conditioning outlets) are also limited.

In contrast, the first cross T-bar 3 has multiple (two in the embodiment) second joints 34, and each second joint 34 can be joined to a first joint (first joint 43 of the second cross T-bar 4). In the first cross T-bar 3, one second joint 34 is provided at the center position in the longitudinal direction of the main body 30, and the other second joint 34 is provided between the center position in the longitudinal direction and the end position in the longitudinal direction. Therefore, the system ceiling 1 using the first cross T-bar 3 can combine a grid type system ceiling with a line type system ceiling. As a result, the system ceiling 1 can use both equipment for a grid type system ceiling and equipment for a line type system ceiling, so that a variety of system ceilings can be provided while further simplifying the construction work.

(summary)
The T-bar (first cross T-bar 3) according to the first aspect of the present disclosure is used in a system ceiling (1). The T-bar according to the first aspect has a long main body (30), first connecting parts (33) provided at both ends of the main body (30) in the longitudinal direction, and a plurality of second connecting parts (34) provided on the side of the main body (30) and connectable to the first connecting parts (first connecting parts 43 of the second cross T-bar 4).

The T-bar of the first embodiment can further simplify construction work compared to the conventional configuration in which joiners are used to join the bars.

The T-bar according to the second aspect of the present disclosure can be realized in combination with the first aspect. In the T-bar according to the second aspect, it is preferable that one of the multiple second joints (34) is provided in the center of the longitudinal direction on the side of the main body (30).

The T-bar according to the second aspect can realize a system ceiling (1) that combines a grid type system ceiling and a line type system ceiling.

The T-bar according to the third aspect of the present disclosure can be realized by combining it with the first or second aspect. In the T-bar according to the third aspect, the main body (30) preferably has a long, flat main portion (31) and a bottom portion (32) provided at the lower end of the main portion (31) along the longitudinal direction of the main portion (31). The bottom portion (32) is preferably formed in a square tube shape having a linear opening portion (320) along the longitudinal direction of the bottom portion (32). The longitudinal end portion (322) of the bottom portion (32) is preferably inclined in a direction approaching the opening portion (320) toward the longitudinal tip of the bottom portion (32). The bottom portion (32) preferably has a notch portion (321) connected to the opening portion (320) at a position corresponding to at least one of the second joint portions (34) among the plurality of second joint portions (34). It is preferable that the notch (321) is formed with a shape and dimensions that allow it to mate with the end (322).

When the T-bar according to the third aspect is combined with other types of T-bars (main T-bar 2 and second cross T-bar 4), the opening (320) of the bottom (32) can be connected to the opening (opening 220, opening 420) of the bottom (bottom 22, bottom 42) of the other types of T-bars. As a result, the T-bar according to the third aspect can improve the external appearance of the system ceiling (1) by connecting the opening (320) to the opening of the other types of T-bars.

The T-bar according to the fourth aspect of the present disclosure can be realized in combination with the third aspect. In the T-bar according to the fourth aspect, it is preferable that the notch (321) is formed so that the width along the longitudinal direction of the bottom (32) increases as it moves away from the opening (320).

The T-bar of the fourth aspect can improve the workability of fitting the end of another type of T-bar (end 422 of the second cross T-bar 4) into the notch (321), and the work of fitting the end (322) into the notch of another type of T-bar (notch 221 of the main T-bar 2).

The system ceiling (1) according to the fifth aspect of the present disclosure has a plurality of main T-bars (2) installed in parallel at regular intervals, and a plurality of first cross T-bars (3) connected to the plurality of main T-bars (2) so as to intersect with the plurality of main T-bars (2). The system ceiling (1) according to the fifth aspect has a plurality of second cross T-bars (4) connected to the plurality of first cross T-bars (3) so as to intersect with the plurality of first cross T-bars (3) and to be parallel to the plurality of main T-bars (2). Each of the plurality of first cross T-bars (3) is a T-bar according to any one of the first to fourth aspects.

The system ceiling (1) according to the fifth aspect can realize a system ceiling (1) that combines a grid type system ceiling and a line type system ceiling while further simplifying the construction work.

The system ceiling (1) according to the sixth aspect of the present disclosure can be realized by combining it with the fifth aspect. In the system ceiling (1) according to the sixth aspect, each of the first cross T-bars (3) is preferably a T-bar according to the third or fourth aspect. It is preferable that the opening (220) of the bottom (22) of the main T-bars (2) is connected to the opening (320) of the bottom (32) of the first cross T-bar (3).

The system ceiling (1) according to the sixth aspect can improve the external appearance.

The system ceiling (1) according to the seventh aspect of the present disclosure can be realized by combining it with the sixth aspect. In the system ceiling (1) according to the seventh aspect, it is preferable that the first joint (33) of the first cross T-bars (3) is joined to the second joint (34) of the main T-bar (2). In the system ceiling (1) according to the seventh aspect, it is preferable that the second joint (34) of the first cross T-bars (3) is joined to the first joint (43) of the second cross T-bar (4).

The system ceiling (1) according to the seventh aspect can combine a grid type system ceiling and a line type system ceiling.

1 System ceiling 2 Main T-bar 3 First cross T-bar (T-bar)
4 Second cross T-bar 22 Bottom 30 Main body 31 Main part 32 Bottom 33 First joint part 34 Second joint part 43 First joint part 220 Opening 320 Opening 321 Notch 322 End part

Claims (6)

A system ceiling having multiple types of T bars ,
The plurality of types of T bars are
Multiple main T-bars are installed parallel to each other at regular intervals,
a plurality of first cross T-bars coupled to the plurality of main T-bars so as to cross the plurality of main T-bars;
a plurality of second cross T-bars that intersect with the plurality of first cross T-bars and are connected to the plurality of first cross T-bars so as to be parallel to the plurality of main T-bars;
having
The plurality of types of T bars including the main T bar, the first cross T bar, and the second cross T bar are
With a long body,
a first coupling portion provided at each end of the main body in a longitudinal direction;
a plurality of second coupling parts provided on a side surface of the main body, the second coupling parts being provided on ends of other T bars intersecting with the T bar and capable of being coupled to coupling parts having the same structure as the first coupling parts;
having
The main body has a main portion that is an elongated flat plate,
The second coupling portion has a semi-cylindrical insertion portion protruding from a side surface of the main body and a protruding piece protruding from the side surface of the main body in the same direction as the insertion portion,
the first connecting portion is provided on a side surface of a body of another T-bar that intersects with the T-bar, and has a mating piece that is inserted into the insertion portion of a connecting portion having the same structure as the second connecting portion ,
A groove is provided at the tip of the mating piece, and a protruding piece of a coupling part having the same structure as the second coupling part is provided on the side of the main body of another T-bar that intersects with the T-bar and is fitted into the groove.
System ceiling . One of the plurality of second coupling portions is provided at the center of the side surface of the main body in the longitudinal direction.
The system ceiling according to claim 1. The main body further includes a bottom portion provided at a lower end of the main portion along a longitudinal direction of the main portion,
The bottom portion is formed in a rectangular tube shape having a linear opening along a longitudinal direction of the bottom portion,
The end portion of the bottom portion in the longitudinal direction is inclined toward the opening toward the tip of the bottom portion in the longitudinal direction,
the bottom portion has a notch connected to the opening at a position corresponding to at least one of the plurality of second coupling portions;
The notch is formed in a shape and size such that it can be engaged with an end of a body having the same structure as the body of another T-bar that intersects with the T-bar .
3. The system ceiling according to claim 1 or 2. The cutout portion is formed so as to have a width along the longitudinal direction of the bottom portion that increases with increasing distance from the opening portion.
The system ceiling according to claim 3. The plurality of main T-bars have a body having the same structure as the body, and the openings in the bottom portions of the plurality of main T-bars are connected to the openings in the bottom portion of the first cross T-bar.
The system ceiling according to claim 3 or 4 . The first coupling portions of the first cross T-bars are provided on the side of the main body of the main T-bar and are coupled to a coupling portion having the same structure as the second coupling portion,
The second connecting portions of the plurality of first cross T-bars are provided at the ends of the second cross T-bars and are connected to connecting portions having the same structure as the first connecting portions.
The system ceiling according to claim 5.

Images