Ceiling unit

Abstract

To eliminate the need of providing an insert member beforehand and deal with a change of a hanging position after the construction of a floor slab.SOLUTION: A ceiling unit (1) including a deck plate (2) comprises an anchorage part (3) extending to one surface of the deck plate and integrated with concrete in laying the concrete (10) to the deck plate and an attachment part (4) extending to the other surface of the deck plate and in continuation with the anchorage part and with a hanging tool (6) attached thereto.SELECTED DRAWING: Figure 1

Description

[Technical field]

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

[0002] Deck plates are widely used as formwork when constructing floor slabs of buildings (see, for example, Patent Document 1). The deck plate is installed so as to span between beams, and both ends of the deck plate are fixed to the beams. After the deck plate is fixed, concrete is poured on the deck plate, and the floor slab is constructed as the concrete hardens. The floor slab constitutes the ceiling when viewed from the floor below, and since pipes and wiring for electrical and air conditioning equipment are placed in the ceiling, hanging devices (hanging bolts, etc.) are installed on the floor slab, which serves as the ceiling. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 7-238621 Summary of the Invention [Problem to be solved by the invention]

[0004] Incidentally, in order to install hanging devices in advance in the floor slab that will become the ceiling, insert members are placed when the concrete is poured; however, if the hanging position of the hanging device needs to be changed after the concrete has solidified and the floor slab has been constructed, it is difficult to change the hanging position because the position of the insert member cannot be changed. In addition, the installation position of the insert member had to be determined in advance and installed before the concrete hardened, which resulted in poor workability. It is also possible to provide a lifting device on the deck plate to allow for flexible changes to the lifting position, but this has been difficult to achieve because some types of deck plates are not designed to be moored to the floor slab, and there is a risk that the deck plate will fall from the floor slab due to the weight of the piping and wiring.

[0005] Therefore, the present invention has been made in consideration of the above-mentioned problems, and aims to provide a ceiling unit that does not require the installation of an insert member in advance and can accommodate changes to the hanging position after the floor slab is constructed. [Means for solving the problem]

[0006] In order to solve the above problems, the present invention provides a ceiling unit comprising a deck plate, comprising: an anchoring portion extending onto one side of the deck plate and integrated with the concrete when the concrete is poured onto the deck plate; and an attachment portion extending onto the other side of the deck plate, continuous with the anchoring portion, and to which a suspension device is attached.

[0007] It is also preferable that the mounting portion includes a plate portion having a plurality of engagement portions for the suspender formed thereon.

[0008] It is also preferable that the engagement portion is formed along the width and length directions of the plate portion.

[0009] It is also preferable that the engaging portion is a through hole, and that the through hole is formed with a thread groove for screwing into the hanging tool.

[0010] Moreover, it is preferable that the plate portion is formed in a corrugated shape.

[0011] In addition, it is preferable that the fixing portion includes a locking portion extending in a direction intersecting the thickness direction of the deck plate. Effect of the Invention

[0012] According to the present invention, there is no need to provide an insert member in advance, and the suspension position can be changed after the floor slab is constructed. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a partial cross-sectional view of a floor slab constructed with ceiling units. [Diagram 2] 1 is an oblique view of a ceiling unit before the plate portion is attached. FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] 1 is an oblique view of a ceiling unit with a plate portion attached. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Note that the embodiments described below are merely examples, and various embodiments are possible within the scope of the present invention.

[0015] As shown in FIGS. 1 to 5, the ceiling unit 1 includes a deck plate 2, a fixing portion 3, a mounting portion 4, and a plate portion 5. The deck plate 2 serves as a formwork for concrete to be poured when constructing a floor slab (ceiling slab) 100 of an architectural structure. As shown in Fig. 1, the deck plate 2 becomes one with the concrete after the concrete has solidified, thereby increasing the rigidity of the floor slab (ceiling slab) 100. That is, as shown in Fig. 1, the floor slab (ceiling slab) 100 includes a ceiling unit 1 and a concrete portion 10 that is poured on the upper surface of the deck plate 2 in this ceiling unit 1 and is formed one with the deck plate 2 upon solidification.

[0016] The deck plate 2 is bridged between opposing beams. One end of the deck plate 2 is placed on one beam and fixed to the beam by welding or the like, and the other end is placed on the other beam and fixed to the beam by welding or the like. Specifically, the beams are made of, for example, H-shaped steel, and each end of the deck plate 2 is placed on and fixed to a flange portion of the H-shaped steel that constitutes the respective beam.

[0017] As shown in Figures 1 and 2, the deck plate 2 is formed from a thin steel plate (metal plate). Some deck plates 2 are made of steel plate that has been subjected to surface treatment such as galvanization. The deck plate 2 is manufactured by roll-forming a single flat steel plate using a roll-forming machine. The deck plate 2 is bent at multiple locations by the roll-forming machine. The deck plate 2 includes a rib 21, a flat portion 22, an end-closed portion 23, and a protruding portion 24 (concave-convex portion).

[0018] The ribs 21 are formed by bending a steel plate. The ribs 21 are bent toward one side of the steel plate at a predetermined interval, bent multiple times along the way, and then bent at the first bending position so as to follow the surface direction of the steel plate. The ribs 21 are formed by connecting the steel plates that are partially folded back by crimping or the like. This prevents the ribs 21 from opening. A plurality of ribs 21 are formed at predetermined intervals along the width direction (short direction) of the deck plate 2. The ribs 21 are formed to extend along the length direction (longitudinal direction) of the deck plate 2. In other words, the ribs 21 are formed continuously from one end to the other end along the suspension direction on the beam.

[0019] The flat portions 22 are portions of the deck plate 2 that have not been subjected to bending processing. In other words, the flat portions 22 are portions that are sandwiched between adjacent ribs 21. In the deck plate 2, the flat portions 22 are formed on the same plane.

[0020] The end closed portions 23 are formed at both ends in the length direction (longitudinal direction) of the deck plate 2. The end closed portions 23 are formed by crushing both ends of the rib 21 in a direction perpendicular to the surface of the deck plate 2. As a result, the rib 21 is formed with a cross section in which the end closed portions 23 at both ends are crushed, and the other portion sandwiched between the end closed portions 23 is formed in a generally triangular shape in cross section. As a result, both ends of the rib 21 are lower in height than the other portions, so that it can be placed on the upper surface of the flange portion of the beam. The end closed portions 23 are formed so that the length along the extension direction of the rib 21 is longer than the length at which it is placed on the upper surface of the flange portion of the beam.

[0021] The protrusions 24 are formed on each flat portion 22. The protrusions 24 are formed, for example, by embossing, and are formed so as to protrude on the opposite side of the deck plate 2 from the ribs 21. Here, the protrusions 24 may be formed so as to protrude on the same side as the ribs 21. The protrusions 24 increase the strength and rigidity of the deck plate 2. The protrusions 24 extend, for example, in a direction perpendicular to the extension direction of the ribs 21, that is, along the width direction (short side direction) of the deck plate 2. After concrete is poured on the upper surface of the deck plate 2 and hardened, the protrusions 24 engage with the concrete, thereby increasing resistance to horizontal loads.

[0022] As shown in FIG. 1, FIG. 2, and FIG. 5, the fixing portion 3 extends on one surface of the deck plate 2 and is integrated with the concrete when the concrete is poured on the deck plate 2 and solidifies. That is, the fixing portion 3 is provided so as to extend on the upper surface of the deck plate 2 when the deck plate 2 is installed between the beams. The fixing portion 3 is, for example, a metal member extending in a round bar shape, and is attached to the deck plate 2 by welding or the like so as to extend in a direction perpendicular to one surface of the deck plate 2. An engaging portion 31 is formed on one end of the fixing portion 3 that is farther from the deck plate 2 and extends in a direction intersecting the thickness direction of the deck plate 2. Specifically, the engaging portion 31 is formed by bending so as to extend along the surface direction of the deck plate 2. When a force is applied to the fixing portion 3 in the pull-out direction (the downward direction in FIG. 1), the engaging portion 31 is engaged with the concrete portion 10 to prevent the fixing portion 3 from coming off the concrete portion 10.

[0023] As shown in FIG. 1, FIG. 2, and FIG. 5, the mounting portion 4 extends to the other surface side of the deck plate 2, continues to the fixing portion 3, and is a portion to which the plate portion 5 or the hoisting device 6 is attached. That is, the mounting portion 4 is provided so as to extend to the lower surface of the deck plate 2 (the surface on the side on which the rib 21 is formed) when the deck plate 2 is installed between the beams. The mounting portion 4 is, for example, a metal member extending in a round bar shape, and is attached to the deck plate 2 by welding or the like so as to extend in a direction perpendicular to the other surface of the deck plate 2. The mounting portion 4 is, for example, formed integrally with the fixing portion 3, and is formed side by side on the same axis line, except for the locking portion 31. The end of the mounting portion 4 opposite the fixing portion 3 is provided so as to protrude downward from the rib 21 of the deck plate 2. A screw groove 41 is formed on the surface of the end of the mounting portion 4 opposite the fixing portion 3, and a nut 42 that screws into the screw groove 41 is provided. The integrally formed fixing portion 3 and mounting portion 4 are provided, for example, in the vicinity of the four corners of the deck plate 2.

[0024] As shown in Fig. 1 and Fig. 3 to Fig. 5, the plate portion 5 is a plate material (metal plate) formed in a rectangular shape when viewed from above. The plate portion 5 may be subjected to a surface treatment such as zinc plating. When viewed from the side, the plate portion 5 is formed in a wave shape in which concave portions and convex portions are alternately and continuously arranged. The concave portions and convex portions are formed along the length direction of the plate portion 5. The plate portion 5 is formed with a plurality of through holes 51 penetrating in the thickness direction along the length direction and width direction. The through holes 51 function as engagement portions for the suspender 6. The through holes 51 are formed in the recesses of the plate portion 5, but may be formed in the protrusions, or may be formed in both the recesses and the protrusions. The plurality of through holes 51 adjacent in the width direction are formed, for example, in a staggered pattern. The through holes 51 are formed with, for example, a screw groove 52 that screws into the suspender 6. The plate portion 5 is attached to the mounting portion 4, for example, near its four corners. Specifically, the through hole 51 is formed with a size that allows the end of the mounting portion 4 opposite the fixing portion 3 to be inserted therethrough. After the mounting portion 4 is inserted into the through hole 51, the nut 42 is screwed into the thread groove 41, thereby attaching the plate portion 5 to the mounting portion 4. When the plate portion 5 is attached to the mounting portion 4, the plate portion 5 extends along the surface direction of the flat portion 22 of the deck plate 2.

[0025] When constructing the floor slab 100, the ceiling unit 1, which is equipped with an anchoring portion 3, a mounting portion 4 and a plate portion 5 precast on a deck plate 2, is spanned between the beams. Next, concrete is poured onto one surface of the deck plate 2 of the ceiling unit 1. Here, since the anchoring portion 3 extends into the area where the concrete is poured, the anchoring portion 3 is integrated with the concrete. This results in the construction of a floor slab 100 in which the deck plate 2 and the plate portion 5 are arranged at intervals in the height direction.

[0026] As described above, the ceiling unit 1 is provided with the mounting section 4 to which the hanging device 6 is attached, which is continuous with the fixing section 3 integrated with the concrete section 10, so that there is no need to provide an insert member (for the hanging device) for integrating with the concrete when pouring in order to install the hanging device 6 in advance. Furthermore, even if the hanging position is changed after the construction of the floor slab 100, this can be accommodated by attaching a member to the mounting section 4 that guides the hanging device 6 to the changed hanging position. Furthermore, by providing the plate portion 5 on the mounting portion 4, the hanging device 6 can be provided on the plate portion 5. Here, since the plate portion 5 is formed with a plurality of through holes 51 having thread grooves 52, the through holes 51 can be used as engagement portions for the hanging device 6, and even if the hanging position is changed after the construction of the floor slab 100, the mounting position of the hanging device 6 can be easily changed by simply changing the through holes 51 that engage the hanging device 6. Furthermore, since the wiring 7 and piping 7 can be installed on the upper surface of the plate portion 5, the wiring 7 and piping 7 are not exposed to the room. Furthermore, since the plate portion 5 is suspended from the concrete via the mounting portions 4 and the anchoring portions 3, and not suspended from the deck plate 2, there is no risk of the deck plate 2 falling off. In particular, the flat deck lacks adhesion to the concrete portion 10, but since the anchoring portions 3 are embedded in the concrete portion 10, the composite structure of the flat deck and the concrete portion 10 can increase the strength and rigidity of the floor slab 100.

[0027] In addition, since the fixing portion 3, the mounting portion 4 and the plate portion 5 can be precast onto the deck plate 2, they can be manufactured in advance as a ceiling unit 1 in a factory, thereby reducing the work required at the construction site. Furthermore, since the plate portion 5 has a plurality of through holes 51 formed therein, the weight of the plate portion 5 can be reduced. In addition, air can circulate between the spaces above and below the plate portion 5 via the through holes 51, making it possible to use the space between the plate portion 5 and the deck plate 2 for passive air conditioning. Furthermore, since light can be transmitted through the through holes 51, indirect lighting can be provided in the space between the plate portion 5 and the deck plate 2. The plate portion 5 can also be used as a base for a ceiling.

[0028] <Other> The present invention is not limited to the above-described embodiment. For example, the through hole 51 of the plate portion 5 may be a simple hole without forming the screw groove 52, and the suspender may be fixed by a nut that screws onto the suspender. The ceiling unit 1 can be constructed using any deck plate 2, such as a QL deck plate or a reinforced deck plate. Furthermore, the plate portion 5 is not limited to being formed in a corrugated shape when viewed from the side as described above, but may be formed in a flat plate shape with no irregularities when viewed from the side. [Explanation of symbols]

[0029] 1 Ceiling unit 2 Deck plate 21 Ribs 22 Flat area 23 End-closed section 24 Projection part 3 Fixing section 31 Locking part 4 Mounting part 41 Thread groove 42 Nut 5 Plate section 51 Through hole (engagement portion) 52 Thread groove 6. Lifting equipment 7 Wiring and piping 10 Concrete Section 100 Floor slab

Claims

1. A ceiling unit having a deck plate, An anchoring portion extending on one surface of the deck plate and integrated with the concrete when concrete is poured onto the deck plate; An attachment portion extending on the other surface of the deck plate and continuing to the fixing portion, to which a hoisting tool is attached; a plate portion provided on the mounting portion, the plate portion having a plurality of engagement portions for the suspender formed along the width direction and the length direction; The engagement portion is a through hole, A ceiling unit characterized in that the through hole has a threaded groove formed therein for screwing into the hanging device.

2. The ceiling unit according to claim 1 , wherein the plate portion is formed in a corrugated shape.

3. The ceiling unit according to claim 1 or 2, characterized in that the fixing portion has a locking portion extending in a direction intersecting the thickness direction of the deck plate.

4. A ceiling unit having a deck plate, An anchoring portion extending on one surface of the deck plate and integrated with the concrete when concrete is poured onto the deck plate; An attachment portion extending on the other surface of the deck plate and continuing to the fixing portion, to which a hoisting tool is attached; a plate portion provided on the mounting portion and having a plurality of engagement portions for the suspender, The engagement portion is a through hole, A ceiling unit characterized in that the through hole has a threaded groove formed therein for screwing into the hanging device.

5. A ceiling unit as described in claim 4, characterized in that the plate portion is formed in a wave shape.

6. A ceiling unit as described in claim 4 or 5, characterized in that the fixing portion has a locking portion extending in a direction intersecting the thickness direction of the deck plate.

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