Ceiling embedded device mounting structure

Abstract

To provide an attachment structure of a ceiling embedded device which can meet predetermined fire-resistance standards without lowering a ceiling significantly and facilitate construction of a heat insulation cover.SOLUTION: An attachment structure 2 of a ceiling embedded device includes: a ceiling 22 formed by a ceiling board 21 which meets predetermined fire-resistance standards; a ceiling embedded device 1 which is embedded on a ceiling space with a lower surface exposed at an opening provided at the ceiling 22; and a heat insulation box 5 which has a box shape in which the lower side is open and encloses the ceiling embedded device 1 with an upper plate 50 and a side plate 51. The heat insulation box 5 meets the same predetermined fire-resistance standards as the ceiling board 21.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a ceiling embedded device mounting structure for suspending and fixing a ceiling embedded device such as a built-in air conditioner or a ventilator fan above the ceiling, and more particularly to a ceiling embedded device mounting structure in which the device is enclosed in a heat insulating box. [Background technology]

[0002] Among conventional air conditioners and ventilators, various types of ceiling embedded type that are embedded in the ceiling have been known. As a method for supporting such ceiling embedded devices in a building, a hanging metal fitting protruding from the ceiling embedded device is fixed to a hanging bolt supported on the building frame above the ceiling, so that the ceiling embedded device is supported so as to be suspended (see Patent Document 1 and Patent Document 2).

[0003] The above-mentioned ceiling-embedded device mounting structure has hanging hardware and hanging bolts on the ceiling-embedded device, and these hanging hardware and hanging bolts get in the way, so when covering it with a mat of insulating material, it is difficult to wrap it around the ceiling-embedded device and it is also difficult to wrap it without gaps. Also, when covering it with a board of insulating material, it is difficult to avoid interference with the hanging hardware and hanging bolts, and on-site processing such as cutting out is required, which makes the construction time-consuming.

[0004] Therefore, in order to facilitate the application of the insulating coating while reliably ensuring a certain level of insulating performance, the applicant of the present application proposed an installation structure for a ceiling-embedded device in which an insulating box with an opening downward is suspended from the main body and the ceiling-embedded device is fixed inside the insulating box (see Patent Document 3). [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2000-320888 A [Patent Document 2] JP 2001-235177 A [Patent Document 3] JP 2017-146012 A Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, the heat-insulating box in Patent Document 3 is made of glass wool board or rock wool board, and cannot ensure the fire resistance equivalent to 15 mm reinforced gypsum board required for a one-hour quasi-fire-resistant structure. Therefore, in order to design a one-hour quasi-fire-resistant structure while arranging a ceiling-embedded device, it is necessary to create a double ceiling structure in which a fire line made of 15 mm reinforced gypsum board is formed above the ceiling and the ceiling-embedded device, and the gypsum board that forms the ceiling and the ceiling-embedded device are suspended below the fire line.

[0007] However, when using a double ceiling structure, the ceiling becomes lower, which reduces the freedom of design and may reduce livability. Also, there is a problem that the construction work becomes more labor-intensive because two works are required: the construction of reinforced gypsum board for the fire line and the construction of the gypsum board for the ceiling. Furthermore, the members for suspending the ceiling embedded device penetrate the reinforced gypsum board that forms the fire line, which increases the difficulty of construction and adds construction work such as applying fireproof putty to the penetration part to maintain the fire line.

[0008] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide an installation structure for a ceiling-embedded device that can meet specified fire resistance standards without significantly lowering the ceiling and that can facilitate the application of a thermal insulation coating. [Means for solving the problem]

[0009] The mounting structure for a ceiling embedded device of the present invention comprises a ceiling formed by a ceiling plate, a ceiling embedded device embedded in the ceiling space with its underside exposed in an opening in the ceiling, and an insulating box having an open bottom and a top plate and side plates that surround the ceiling embedded device. The ceiling embedded device includes a flange protruding horizontally from the lower end of a side surface thereof, a hanging part fixed to a receiving material supported by a building frame and hanging vertically, and a frame-shaped connecting frame connecting the hanging part and the flange, the ceiling panel is reinforced gypsum board, the insulation box is formed by laminating an insulation layer made of a plate-shaped insulation material and a reinforced gypsum board layer having the same thickness as the ceiling panel, the insulation box has a side panel disposed between the side surface of the ceiling embedded device and the hanging part, and is placed on a horizontal part formed at the lower end of the connecting frame, the hanging part suspends the connecting frame so as to be adjustable in the vertical direction, the insulation box has a work opening provided in a position adjacent to the hanging part of the side panel, and a closing plate is fitted into the work opening, and the closing plate is formed by laminating an insulation layer made of a plate-shaped insulation material and a reinforced gypsum board layer having the same thickness as the ceiling panel.It is characterized by the following.

[0012] The mounting structure for a ceiling-embedded device of the present invention is characterized in that the insulating box has an opening formed in a side panel other than the side panel on which the work opening is provided, by cutting out a portion of the side panel, and an opening cover plate is fitted into the opening, and the opening cover plate is composed of an insulating layer made of a plate-shaped insulating material and a reinforced gypsum board layer of the same thickness as the ceiling panel laminated thereto, and has an insertion hole through which a duct can be inserted. Effect of the Invention

[0013] According to the mounting structure for the ceiling embedded device of the present invention, the ceiling panel meets the specified fire resistance standards, and the insulating box meets the same specified fire resistance standards as the ceiling panel, so a fire line can be formed by the ceiling panel and the insulating box, and there is no need to create a double ceiling in which a separate fire line is formed above the ceiling and the ceiling embedded device. This means there is no need to lower the ceiling, allowing for greater design freedom, and since there is no double ceiling, the effort required for construction can be reduced.

[0014] According to the mounting structure for the ceiling-embedded device of the present invention, the insulating box is formed by laminating an insulating layer and a reinforced gypsum board layer of the same thickness as the ceiling board, so that it can reliably meet the same specified fire resistance standards as the ceiling board and ensure the desired insulation performance.

[0015] According to the mounting structure for the ceiling embedding device of the present invention, the side plate of the insulation box is disposed between the side surface of the ceiling embedding device and the hanging portion, and is placed on the horizontal portion formed at the lower end of the connecting frame, so that the insulation box can be held without unnecessary damage. And, since the insulation box has an access port provided at a position close to the hanging portion of the side plate, the height of the insulation box can be adjusted by adjusting the connecting frame in the vertical direction by operating the hanging portion, and after the height adjustment, the access port can be blocked with a blocking plate on which an insulation layer and a reinforced gypsum board layer are laminated, so that construction can be facilitated while meeting the specified fire resistance standard.

[0016] According to the mounting structure for a ceiling-embedded device of the present invention, an opening is formed in a side panel of the insulating box that is different from the side panel on which the service opening is provided, and an opening cover plate is fitted into the opening.The opening cover plate has an insertion hole formed therein for inserting a duct, and the insulating layer and reinforced gypsum board layer are laminated.This reduces the loss of the fire-resistant line while preventing a decrease in workability, and by wrapping fire-resistant covering material around the gap between the insertion hole and the duct and around the duct, the mounting structure for mounting a ceiling-embedded device with a duct can meet specified fire resistance standards. [Brief description of the drawings]

[0017] [Figure 1] 1 is a cross-sectional view illustrating the overall configuration of a mounting structure for a ceiling embedded device. [Diagram 2] 4 is another cross-sectional view illustrating the overall configuration of the mounting structure for the ceiling embedded device. FIG. [Diagram 3] FIG. 4 is a perspective view illustrating the connecting frame and a hanging fitting fixed to the connecting frame. [Figure 4] FIG. 4 is an exploded perspective view of the insulation box seen from diagonally above. [Diagram 5] FIG. 4 is an exploded perspective view of the insulation box as viewed obliquely from below. [Figure 6] 1 is a cross-sectional view illustrating the reinforced gypsum board layer, the insulation layer, and the reinforcing steel plate of the insulation box. [Figure 7] 13 is a side view illustrating the state in which the insulating box is inserted and placed inside the connecting frame. FIG. [Figure 8] 13 is a perspective view illustrating the state in which the insulating box is inserted and placed inside the connecting frame. FIG. [Figure 9] 13 is a diagram illustrating the state in which the upper end of the hanging fitting fixed to the connecting frame on which the insulation box is placed is fixed to the hanging bolt. FIG. [Figure 10] 13 is a diagram illustrating the state in which the connecting frame on which the insulation box is placed is fixed to the hanging bolt via the hanging bracket, and after the height is adjusted, the working opening is closed with a blocking plate. [Figure 11] 13 is a diagram illustrating the process of lifting the device body so that it is stored in the insulating box and fixing the flange to the horizontal part of the connecting frame. FIG. [Figure 12] 13A and 13B are diagrams illustrating the state in which an opening closing plate is fitted into the opening of the insulation box. [Figure 13] FIG. 4 is a diagram for explaining the state of connecting a duct and wiring to a ceiling embedded device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] Hereinafter, an embodiment of the ceiling embedding device mounting structure 2 according to the present invention will be described with reference to the drawings. As shown in Figures 1 and 2, the ceiling embedding device mounting structure 2 includes a ceiling 22 formed by ceiling boards 21 on a ceiling joist 20 supported by a building frame (not shown), a ceiling embedding device 1 embedded in the ceiling space with its underside exposed to an opening in the ceiling 22, a hanging part 3 that hangs and fixes the ceiling embedding device 1 to a hanging wood support material 23 provided in the ceiling space, a connecting frame 4 that connects the hanging part 3 to the ceiling embedding device 1, and a heat-insulating box 5 that surrounds the ceiling embedding device 1.

[0019] The ceiling 22 is formed by fixing a ceiling board 21 made of a reinforced gypsum board having a thickness of 15 mm to the ceiling joist 20. The ceiling board 21 has the non-combustibility required for a one-hour quasi-fireproof structure. The ceiling 22 is provided with an opening through which the underside of the ceiling embedding device 1 can be exposed. The ceiling embedding device 1 is a device that is embedded in the ceiling space with its underside exposed from an opening provided in the ceiling 22, such as a built-in air conditioner, a bathroom dryer, or a ventilation fan. The ceiling embedding device 1 includes a device main body 10 that is embedded in the ceiling space with its underside exposed to an opening provided in the ceiling 22, a flange 11 that protrudes horizontally from the lower end of the side of the device main body 10, and a louver 12 that is attached to the underside of the device main body 10. The device main body 10 of the ceiling embedding device 1 is provided with an adapter 13 to which a ventilation duct 14 can be attached on the side, as shown in FIG. 2. The ceiling embedding device 1 of the present invention may be of a shape that does not require the duct 14 to be attached. Furthermore, since the main point of the mounting structure 2 for a ceiling embedded device of this embodiment is the structure for mounting the ceiling embedded device 1, a description of the function and internal configuration of the ceiling embedded device 1 itself will be omitted.

[0020] The hanging section 3 has a hanging bolt 30 suspended from the hanging wood receiving material 23, a hanging metal fitting 31 screwed to the connecting frame 4 and protruding upward from the connecting frame 4, and a nut 32 that secures the hanging bolt 30 and the hanging metal fitting 31. The hanging wood receiving material 23 is a longitudinal member that is installed horizontally on a building frame such as a beam (not shown), and is a member that supports a hanging wood (not shown) that supports the ceiling joist 20. The hanging bolt 30 has an upper end fixed to the hanging wood receiving material 23 and is suspended downward from the hanging wood receiving material 23.

[0021] 1 and 3, the hanging fitting 31 is a member that is fixed by a screw to a fixing piece 40 provided at the upper end of the connecting frame 4. The upper end of the hanging fitting 31 is bent in a direction away from the device main body 10, and is formed so as to have an inverted L shape when viewed from the side. The upper end of the hanging fitting 31 is formed with a notch 33 into which the hanging bolt 30 can be inserted, and the hanging bolt 30 is inserted into this notch 33, and the upper end of the hanging fitting 31 is sandwiched between upper and lower nuts 32 that are screwed onto the hanging bolt 30, thereby fixing the hanging bolt 30 and the hanging fitting 31. The height of the hanging fitting 31 can be adjusted by tightening and loosening the upper and lower nuts 32 relative to the hanging bolt 30.

[0022] The connecting frame 4 has four fixing pieces 40 that protrude upward to be joined to the hanging hardware 31, a vertical section 41 that is rectangular in shape and arranged parallel to the side of the device body 10 with a gap therebetween, with its upper end joined to the fixing pieces 40 and hanging down from the hanging hardware 31, and a horizontal section 42 that protrudes from the lower end of the vertical section 41 towards the device body 10 and fixes the flange 11 of the ceiling embedded device 1 to its lower side. The fixing pieces 40 are provided on two opposing sides of the upper end of the vertical section 41 of the connecting frame 4 so as to protrude upward, and the hanging hardware 31 is fixed to the fixing pieces 40 with screws.

[0023] As shown in Figs. 4 and 5, the heat insulation box 5 has a hollow rectangular parallelepiped shape consisting of one upper plate 50 and four side plates 51. The bottom surface of the heat insulation box 5 is open, and the device body 10 can be inserted from below. Two of the four side plates 51 of the heat insulation box 5 that face each other are provided with an access hole 52. The access hole 52 is formed by cutting the side plate 51 of the heat insulation box 5 from the bottom end to a predetermined height, so that a position of the side plate 51 close to the hanging part 3 of the side plate 51 opens in a square shape, and a closing plate 53 is fitted into the access hole 52. The closing plate 53 is formed in a rectangular shape that completely closes the access hole 52. In addition, the heat insulation box 5 has circular wiring sleeves 54 on the two side plates 51 that do not have the access hole 52. The wiring sleeves 54 are formed side by side in two places on each side plate 51. The wiring sleeve 54 is provided with a closing piece 55 that fits into the wiring sleeve 54, so that the wiring sleeve 54 that is not used for drawing in the wiring 24 can be closed.

[0024] Furthermore, of the side plates 51 on which the access opening 52 is not provided, one of the side plates 51 has an opening 56 formed by cutting out a portion of the side plate 51. The opening 56 is formed by cutting out the lower end of the side plate 51 to a predetermined height to form a rectangular opening. An opening closing plate 57 is fitted into the opening 56. The opening closing plate 57 is formed in a rectangle that matches the opening 56, and a notch 58 is formed in part of the lower end to avoid interference with the ceiling embedded device 1, and an insertion hole 59 into which the duct 14 can be inserted is formed in approximately the center of the opening closing plate 57.

[0025] 6, the heat-insulating box 5 is provided with a reinforced plasterboard layer 60 having a thickness of 15 mm on the inside, and a heat-insulating layer 61 made of micro glass wool having a density of 64K and having a thickness of 25 mm on the outside of the reinforced plasterboard layer 60. A reinforcing iron plate 62 that maintains its shape is provided on the outside of the heat-insulating layer 61. In this embodiment, the reinforced plasterboard layer 60, the heat-insulating layer 61, and the reinforcing iron plate 62 are provided in this order from the inside, but the order of these layers is not limited to this.

[0026] The closing plate 53 fitted to the working opening 52 is formed by laminating a reinforced plasterboard layer 60 having a thickness of 15 mm, the same as the main body of the insulation box 5, a 25 mm thick insulation layer 61 of microglass wool (64K), and a reinforcing iron plate 62. Similarly, the opening closing plate 57 fitted to the opening 56 is formed by laminating a reinforced plasterboard layer 60 having a thickness of 15 mm, the same as the main body of the insulation box 5, a 25 mm thick insulation layer 61 of microglass wool (64K), and a reinforcing iron plate 62. It is preferable that the closing piece 55 that closes the wiring sleeve 54 has a similar structure.

[0027] Next, a method for constructing the mounting structure 2 for a ceiling embedded device configured as described above will be described. In the mounting structure 2 for a ceiling embedded device, first, the insulation box 5 is placed inside the rectangular connecting frame 4 as shown in Figures 7 and 8. That is, the insulation box 5 is placed so that the lower end of the side plate 51 is placed on the horizontal part 42 of the connecting frame 4. At this time, the insulation box 5 is placed so that its access opening 52 is close to the hanging metal fitting 31 fixed to the fixing piece 40 of the connecting frame 4.

[0028] 9, with the heat-insulating box 5 placed on it, notch 33 provided at the upper end of hanging bracket 31 fixed to connecting frame 4 is fitted onto hanging bolt 30 suspended from hanging wood receiving material 23, and hooked onto nut 32 screwed onto hanging bolt 30. Then, by tightening or loosening nut 32 screwed onto hanging bolt 30, the vertical position of hanging bracket 31 is adjusted, and connecting frame 4 is fixed at a position where horizontal portion 42 is at a height approximately equal to the height of the upper surface of ceiling board 21 constituting ceiling 22.

[0029] After completing the height adjustment, closing plate 53 is fitted to close access opening 52, as shown in Fig. 10. Then, wiring 24, such as the power wiring and remote control wiring, is pulled through wiring sleeve 54, as shown in Fig. 11. Closing piece 55 is fitted into wiring sleeve 54 that was not used to pull in wiring 24, and wiring sleeve 54 is closed.

[0030] 11 and 12, while lifting the ceiling embedded device 1 so that the device main body 10 is stored in the heat-insulating box 5, wiring 24 such as the power wiring and remote control wiring is connected to the device main body 10 and the flange 11 is fixed to the horizontal part 42 of the connecting frame 4 with, for example, screws, and then the louver 12 is fixed to the underside of the device main body 10. At this time, the ceiling embedded device 1 is positioned so that the adapter 13 for fixing the duct 14 is exposed from the opening 56. Then, an opening closing plate 57 is fitted into the opening 56. The opening closing plate 57 is positioned so that the adapter 13 is exposed from an insertion hole 59.

[0031] 13, the duct 14 is connected to the adapter 13 inside the insertion hole 59. After that, although not shown, the duct 14 and the gap between the duct 14 and the insertion hole 59 are covered with a fire-resistant covering material such as heat-resistant rock wool. After that, the ceiling boards 21 are fixed to the ceiling joists 20 around the periphery of the ceiling embedding device 1, and the ceiling 22 is formed.

[0032] In this way, the insulation box 5, the blocking plate 53 blocking the working opening 52 of the insulation box 5, the opening blocking plate 57 fitted to the opening 56 of the insulation box 5, and the blocking piece 55 blocking the wiring sleeve 54 are formed with the insulating layer 61 of micro glass wool (64K) having a thickness of 25 mm, so that even when an opening is provided in the ceiling 22 to install the ceiling embedding device 1, the insulation performance of the ceiling 22 is not reduced. Moreover, the insulation box 5 is disposed so that its side plate 51 is disposed between the side surface of the device main body 10 and the vertical part 41, and is disposed surrounding the device main body 10 so as to be placed on the upper surface of the horizontal part 42, so that the side surface of the insulation box 5 does not interfere with the connecting frame 4 or the hanging metal fitting 31, and the blocking plate 53 can be configured to be easily attached and detached, preventing a decrease in insulation performance due to interference with other members.

[0033] The insulation box 5, the blocking plate 53 that blocks the work opening 52 of the insulation box 5, the opening blocking plate 57 that fits into the opening 56 of the insulation box 5, and the blocking piece 55 that blocks the wiring sleeve 54 are provided with a 15 mm thick reinforced gypsum board layer 60 that can be used for a one-hour semi-fire resistant structure, and the ceiling plate 21 that forms the ceiling 22 also uses a similar 15 mm thick reinforced gypsum board, so that the ceiling 22 and the insulation box 5 can form a fire prevention line that meets the standards for a one-hour semi-fire resistant structure.

[0034] In this way, since there is no need to provide a fire prevention line in the ceiling pocket separately from the ceiling 22, the ceiling 22 does not become lower, the construction work can be reduced, and the space below the ceiling 22 can be made into a space with high habitability.

[0035] Incidentally, it goes without saying that the embodiment of the present invention is not limited to the above-mentioned embodiment, and can be appropriately modified without departing from the scope of the concept of the present invention. [Industrial Applicability]

[0036] The mounting structure 2 for a ceiling embedded device according to the present invention can be suitably used as a structure for mounting, for example, a built-in air conditioner. [Explanation of symbols]

[0037] 1 Ceiling recessed device 2. Ceiling-embedded device installation structure 3 Hanging part 4 Connecting Frame 5. Insulation box 11 Flange 14 Duct 21 Ceiling Panel 22 Ceiling 42 Horizontal part 51 Side Panel 52 Work entrance 53 Closing plate 56 Opening 57 Opening Closure Plate 59 Insertion hole 60 Reinforced gypsum board layer 61 Insulation Layer

Claims

1. A ceiling formed by a ceiling board; a ceiling embedding device that is embedded in the ceiling space with its lower surface exposed through an opening provided in the ceiling; a heat-insulating box having an open bottom and an upper plate and a side plate surrounding the ceiling embedded device; A flange protruding horizontally from a lower end of a side surface of the ceiling embedding device; A hanging part that is fixed to a receiving material supported by the structure and hangs down vertically; a frame-shaped connecting frame that connects the hanging portion and the flange; Equipped with The ceiling board is a reinforced gypsum board, The insulation box is formed by laminating an insulation layer made of a plate-shaped insulation material and a reinforced gypsum board layer having the same thickness as the ceiling board, The heat-insulating box has a side panel disposed between a side surface of the ceiling embedding device and the hanging portion, and is placed on a horizontal portion formed at a lower end of the connecting frame, The suspending portion suspends the connecting frame so as to be adjustably movable in the up-down direction, The heat-insulating box has an access opening provided at a position adjacent to the hanging portion of the side plate, and a closing plate is fitted to the access opening, A mounting structure for a ceiling embedded device, characterized in that the closing plate is a laminate of an insulating layer made of a plate-shaped insulating material and a reinforced gypsum board layer having the same thickness as the ceiling plate.

2. The heat-insulating box has an opening formed in a side plate different from the side plate on which the work opening is provided, the opening being formed by cutting out a part of the side plate, An opening closing plate is fitted into the opening, The ceiling mounting structure of claim 1, wherein the opening cover plate is formed by laminating an insulating layer made of plate-shaped insulating material and a reinforced gypsum board layer of the same thickness as the ceiling plate, and an insertion hole through which a duct can be inserted is formed.

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