Equipment installation method

Abstract

To provide a method for installing an apparatus capable of suitably carrying a building unit in a state where the apparatus is installed on a ceiling part even if a lowered ceiling is not provided on the ceiling part of the building unit.SOLUTION: Before transporting a building unit, a fixing screw 48 is inserted into a hole part of each flange part 45 of a ventilation device 30 from below and screwed into a hole part of each fixing piece 42 of a support member 40, and each flange part 45 is placed on a head part 48b of each screwed fixing screw 48. Thereafter, a spacer 50 is disposed between the flange part 45 and the fixing piece 42, and the fixing screw 48 is tightened to temporarily fix the flange part 45 to the fixing piece 42 via the spacer 50. After the transportation of the building unit, each fixing screw 48 is loosened, and the spacer 50 is removed from between the flange part 45 and the fixing piece 42. Thereafter, by tightening each fixing screw 48 upward, each flange part 45 placed on the head part 48b of each fixing screw 48 is pushed up together with the ventilation device 30, and is fixed to each fixing piece 42.SELECTED DRAWING: Figure 5

Description

Technical Field

[0001] The present invention relates to a method for installing equipment.

Background Art

[0002] In unit-type buildings, a ventilation device for indoor ventilation may be installed. Patent Document 1 discloses a configuration in which the ventilation device is installed in the ceiling portion of a building unit constituting the unit-type building. In the configuration of Patent Document 1, a lowered ceiling is provided at a position lower than other ceilings in the ceiling portion of the building unit, and the ventilation device is installed in the ceiling space above the lowered ceiling. With such a configuration, the ventilation device can be installed without protruding above the upper end of the building unit. Therefore, it is possible to install the ventilation device in the ceiling portion of the building unit in the unit manufacturing factory and preferably transport the building unit in the installed state to the construction site where the building is constructed.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, in the configuration of Patent Document 1 described above, since a part of the ceiling of the building unit is a lowered ceiling, there is a possibility that problems such as a loss of the sense of openness indoors may occur.

[0005] Further, when the lowered ceiling is not provided in the building unit and the ventilation device is installed above the ceiling of normal height, the ventilation device will be installed in a state where it protrudes greatly above the upper end of the building unit. Therefore, in this case, it may be difficult to transport the building unit to the construction site with the ventilation device installed in the ceiling portion of the building unit.

[0006] Furthermore, these problems can arise not only when ventilation systems are installed on the ceiling of building units, but also when other equipment, such as air conditioning systems, is installed on the ceiling of building units.

[0007] The present invention has been made in view of the above circumstances, and its main objective is to provide a method for installing equipment that allows a building unit to be suitably transported with the equipment installed on the ceiling, even without providing a dropped ceiling on the ceiling of the building unit. [Means for solving the problem]

[0008] To solve the above problems, the first invention provides a method for installing equipment between a pair of adjacent ceiling beams in the ceiling portion of a building unit, wherein the equipment is provided with a pair of flange portions that protrude laterally toward opposite sides, each flange portion has a first hole that penetrates vertically, each ceiling beam is fitted with a support member having a fixing portion located on the side between the ceiling beams, each fixing portion of the support member has a second hole that opens downward, and the equipment arrangement step is to arrange the equipment between the fixing portions of the support member with each flange portion positioned below the fixing portion of the support member, as a step before transporting the building unit to the building construction site, and in the arrangement state obtained in the equipment arrangement step, a long fastener is inserted from below into the first hole of each flange portion and screwed into the second hole of each fixing portion, and the screwed fasteners The device includes: a device mounting step of placing each flange portion on a head formed at the lower end; a temporary fixing step of, after the device mounting step, placing spacers between the flange portions and the fixing portion on both sides of the device in a manner that avoids the fasteners, and tightening the fasteners in that position to temporarily fix each flange portion to the fixing portion via the spacers; a spacer removal step of, after the building unit has been transported to the building construction site, loosening the fasteners and removing the spacers from between the flange portions and the fixing portion on both sides of the device; and a final fixing step of, after the spacer removal step, tightening the fasteners upward to push the flange portions placed on the heads of the fasteners upward together with the device, and fixing the flange portions to the fixing portion in a state that they are in contact with the fixing portion.

[0009] According to the first invention, before the building unit is transported to the building construction site, an equipment placement process, an equipment mounting process, and a temporary fixing process are performed. Through these processes, each flange portion of the equipment is temporarily fixed to the fixing portion of each support member positioned above the flange portion via spacers. In this temporary fixing state, each flange portion of the equipment is positioned lower than the fixing portion by the height dimension of the spacer, so that the equipment can be positioned at a relatively low position. Therefore, it is possible to prevent the equipment from protruding above the top edge of the building unit. As a result, the building unit can be suitably transported to the construction site with the equipment installed on the ceiling of the building unit.

[0010] Furthermore, after the building unit is transported to the construction site, a spacer removal process and a final fixing process are carried out. Through these processes, the spacers are removed and each flange portion is directly fixed to the fixing portion of each support member. In this final fixed state, the equipment is positioned higher than in the temporary fixed state by the height dimension of the spacers. Therefore, it becomes possible to position the equipment above the normal ceiling height. This makes it possible to install equipment on the ceiling of the building unit without the need for a dropped ceiling.

[0011] The method for installing the equipment of the second invention is as follows: In the first invention, the support member has a long beam fixing member that is arranged along the ceiling beam and fixed to the ceiling beam, and a plurality of fixing parts that are spaced apart in the longitudinal direction of the beam fixing member and fixed to the beam fixing member, and the flange portion has a plurality of first holes corresponding to the plurality of fixing parts, and before the equipment placement step, the support member installation step is to attach the beam fixing member of the support member to the ceiling beam such that each fixing part is located on the side between the ceiling beams, and in the equipment placement step, the fasteners are fastened to each of the first holes of the flange portion The fasteners are inserted and screwed into the second holes of each of the fixing parts of the support member, and the flange portion is placed so as to straddle the heads of the screwed-in fasteners. In the temporary fixing step, the spacers are placed between each of the fixing parts of the support member and the flange portion, and the flange portion is temporarily fixed to each of the fixing parts of the support member via these spacers. In the spacer removal step, the spacers are removed from between each of the fixing parts and the flange portion. In the final fixing step, the flange portion is pushed up and fixed to each of the fixing parts of the support member by tightening the multiple fasteners.

[0012] According to the second invention, the support member has multiple fixing parts, and the flange part of the equipment is fixed to each of these fixing parts, so that the equipment can be installed in a stable state. Furthermore, since the support member is made up of multiple fixing parts fixed to a long beam fixing member, multiple fixing parts can be installed at once by attaching the beam fixing member to the ceiling beam. Therefore, even in a configuration with multiple fixing parts, the work of installing these fixing parts can be easily carried out.

[0013] Incidentally, since the spacers used for the temporary installation of the equipment are removed during the permanent installation, it is conceivable that these removed spacers could be reused for the temporary installation of equipment in other building units. In this regard, with the above configuration, since spacers are individually placed between each fixing part and flange part of the support member, each spacer can be made compact. Therefore, it is convenient when storing the spacers so that they can be reused after removal.

[0014] The installation method for the equipment of the third invention is as follows: In the first or second invention, the spacer has a pair of spacer parts that are spaced apart from each other to form an insertion space between them through which the fastener can be inserted, and a connecting part that connects the spacer parts on the outside of the insertion space. In the temporary fixing step, the spacer parts are placed between the flange part and the fixing part with the fastener inserted into the insertion space, and the flange part is temporarily fixed to the fixing part via the spacer parts by tightening the fastener in that position.

[0015] According to the third invention, each spacer portion is sandwiched between the flange portion and the fixing portion on both sides of the fastener. Therefore, the flange portion can be temporarily fixed to the fixing portion in a stable state. Although a similar effect can be obtained by individually placing spacers on both sides of the fastener, in that case, the temporary fixing work would be troublesome. In this respect, with the above configuration, each spacer portion can be placed on both sides of the fastener at once, and because the fastener fits between each spacer portion, displacement of each spacer portion (and thus the spacer) is less likely to occur, making the temporary fixing work easier.

[0016] The installation method for the equipment of the fourth invention is as follows: In the first invention, the equipment is positioned so that, in the temporary fixing state achieved by the temporary fixing step, it does not protrude above the upper end of the building unit.

[0017] According to the fourth invention, since the device does not protrude above the upper end of the building unit in the temporarily fixed state, the device does not get in the way during the transportation of the building unit. Therefore, the building unit can be more suitably transported to the construction site.

Brief Description of the Drawings

[0018] [Figure 1] (a) is a cross-sectional view of the main installation structure of the ventilation device as viewed from the front side, and (b) is a cross-sectional view as viewed from the side. [Figure 2] (a) is a cross-sectional view of the temporary installation structure of the ventilation device as viewed from the front side, and (b) is a cross-sectional view as viewed from the side. [Figure 3] Perspective view showing the spacer. [Figure 4] Perspective view showing the configuration of the building unit. [Figure 5] Diagram for explaining the installation method of the ventilation device.

Mode for Carrying Out the Invention

[0019] Hereinafter, an embodiment embodying the present invention will be described with reference to the drawings. In this embodiment, in a unit-type building configured by combining a plurality of building units with each other, a ventilation device is installed on the ceiling of any one of the building units. And as an installation method for installing the ventilation device on the ceiling of the building unit, the present invention is embodied. First, the configuration of the building unit 20 will be briefly described below using FIG. 4. Note that FIG. 4 is a perspective view showing the configuration of the building unit 20.

[0020] As shown in FIG. 4, the building unit 20 includes four columns 21 arranged at its four corners, and four ceiling girders 22 and four floor girders 23 that connect the upper and lower ends of each column 21, respectively. A rectangular parallelepiped-shaped frame is formed by these columns 21, ceiling girders 22, and floor girders 23. The column 21 is made of square tubular steel. Further, the ceiling girder 22 and the floor girder 23 are made of channel steel having a U-shaped cross section, and their openings are arranged facing the inside in the horizontal direction.

[0021] Between the opposing ceiling girders 22 on the long side of the building unit 20, a plurality of ceiling joists 25 are spanned at predetermined intervals. Also, between the opposing floor girders 23 on the long side of the building unit 20, a plurality of floor joists 26 are spanned at predetermined intervals. For example, the ceiling joist 25 is made of a lip channel steel, and the floor joist 26 is made of a square steel. The ceiling surface material 27 is supported by the ceiling joist 25, and the floor surface material 28 is supported by the floor joist 26.

[0022] The building unit 20 is manufactured in a unit manufacturing factory and is transported to the building construction site by a transport means such as a truck after manufacturing. And at the construction site, each transported building unit 20 is installed at a predetermined installation position and the building is constructed by being connected to each other.

[0023] Subsequently, the installation structure of the ventilation device 30 installed in the ceiling portion of the building unit 20 will be described based on FIG. 1. FIG. 1 is a cross-sectional view of the installation structure (this installation structure) of the ventilation device 30 as viewed from the front side in (a), and a cross-sectional view as viewed from the side in (b). In addition, in FIG. 1(b), for convenience of explanation, the ceiling joist 25 is shown by a two-dot chain line, and the illustration of the edge 29 and the ceiling surface material 27 is omitted (this point is the same for FIG. 2(b) described later).

[0024] As shown in FIGS. 1(a) and (b), on the ceiling portion of the building unit 20, the ceiling surface material 27 is attached to the lower surface side of each ceiling joist 25 via the edge 29. The edge 29 is a wooden long member extending in the longitudinal direction of the ceiling joist 25 and is attached to the lower surface of the ceiling joist 25. Also, the ceiling surface material 27 is formed of a gypsum board, for example, formed by stacking two gypsum boards. The ceiling surface material 27 is attached to the lower surface of each edge 29 with screws. Note that the ceiling surface material 27 is arranged at a normal ceiling height, and therefore, the ceiling surface material 27 is not a so-called dropped ceiling.

[0025] A ventilation device 30 for ventilating the room is installed above the ceiling panel 27. The ventilation device 30 is formed in the shape of a rectangular parallelepiped and is positioned between a pair of adjacent ceiling beams 25. The ventilation device 30 is positioned with its longitudinal direction facing the longitudinal direction of the ceiling beams 25. The ventilation device 30 corresponds to the "equipment". Also, each of the ceiling beams 25 adjacent to the ventilation device 30 corresponds to the "pair of adjacent ceiling beams".

[0026] The ventilation device 30 is provided with multiple connection points 31 to 33 on each of its short sides, to which ducts (not shown) are connected. An intake duct leading to the outdoors is connected to connection point 31, and outdoor air is drawn into the ventilation device 30 through this intake duct. In addition, a supply air duct leading to the indoor space is connected to connection point 32, and the outdoor air drawn in is supplied to the indoor space (living room, etc.) through this supply air duct.

[0027] An intake grille (not shown) is attached to the lower side of the ventilation device 30 to draw in air from the indoor space. The intake grille is attached to an opening 35 formed in the ceiling panel 27. An exhaust duct leading to the outdoors is connected to the connection part 33, and the indoor air drawn in by the intake grille is discharged outdoors through this exhaust duct. In this way, the ventilation device 30 ventilates the indoor space.

[0028] The ventilation device 30 is attached to each ceiling beam 25 via a support member 40. The support member 40 has a beam fixing member 41 fixed to the ceiling beam 25 and a plurality (specifically three) fixing pieces 42 fixed to the beam fixing member 41. The beam fixing member 41 is formed in a long shape from a wood material and extends in the longitudinal direction of the ceiling beam 25. The beam fixing member 41 also has an L-shaped cross-section and has an upper plate portion 41a placed on the upper surface of the ceiling beam 25 and a side plate portion 41b positioned on the inner surface of the ceiling beam 25 (in other words, the side facing the ventilation device 30). The upper plate portion 41a is fixed to the ceiling beam 25 with fasteners such as screws.

[0029] The fixing pieces 42 are formed in a rectangular parallelepiped shape from a wood material. Each fixing piece 42 is arranged at predetermined intervals (specifically, at equal intervals) in the longitudinal direction of the beam fixing member 41 and is fixed to the outer surface of the side plate portion 41b of the beam fixing member 41 with nails or the like. In this case, each fixing piece 42 is located on the side between each ceiling joist 25 (in other words, on the side of the inner surface of the ceiling joist 25) and is aligned in the longitudinal direction of the ceiling joist 25. In addition, each fixing piece 42 has a hole 43 that penetrates in the vertical direction. Each fixing piece 42 corresponds to a "fixing part," and each hole 43 corresponds to a "second hole."

[0030] The ventilation device 30 has flange portions 45 attached to each side portion 30a on the long side. Each flange portion 45 extends along the lower end of the side portion 30a and has an L-shape in cross-section. The flange portion 45 has a vertical plate portion 45a attached to the side portion 30a and a horizontal plate portion 45b that protrudes laterally from the lower end of the vertical plate portion 45a. In this case, the horizontal plate portion 45b of each flange portion 45 protrudes laterally from the ventilation device 30 toward opposite sides.

[0031] Multiple holes (three in this embodiment) of the horizontal plate portion 45b of each flange portion 45 are formed, penetrating in the thickness direction (in other words, the vertical direction). These holes 47 are arranged at predetermined intervals (specifically, at equal intervals) in the longitudinal direction of the flange portion 45. Furthermore, these holes 47 are formed to correspond to the holes 43 of each fixing piece 42 of the support member 40. Therefore, the spacing (pitch) of each hole 47 is the same as the spacing (pitch) of the holes 43 of each fixing piece 42 of the support member 40. Note that each hole 47 corresponds to the "first hole".

[0032] Each flange portion 45 is fixed from below to each fixing piece 42 of the support member 40 using fixing screws 48. The fixing screw 48 has a shaft portion 48a that extends in the vertical direction and a head portion 48b provided at the lower end of the shaft portion 48a. The fixing screws 48 (specifically the shaft portion 48a) are inserted from below into each hole portion 47 of the flange portion 45, and these inserted fixing screws 48 are screwed into the holes 43 of each fixing piece 42. In this way, each flange portion 45 is fixed to the fixing piece 42, and the ventilation device 30 is installed (permanently installed) between each ceiling beam 25 in this fixed state. The head portion 48b of the fixing screw 48 has a larger diameter than the hole portion 47 and is located on the lower surface of the flange portion 45. Each fixing screw 48 corresponds to a "fastener".

[0033] In this configuration, the ventilation device 30 protrudes above the upper end of the building unit 20 (in Figure 1(a), the upper end line of the building unit 20 is shown by a dashed line). Therefore, transporting the building unit 20 from the unit manufacturing plant to the construction site in this configuration may be hindered. In this embodiment, in view of this, the ventilation device 30 is temporarily installed at the unit manufacturing plant in a state where it does not protrude above the upper end of the building unit 20, and the building unit 20 is transported from the unit manufacturing plant to the construction site in this temporary installation state. The temporary installation structure of the ventilation device 30 will be described below with reference to Figure 2. Figure 2 shows (a) a cross-sectional view of the temporary installation structure of the ventilation device 30 from the front, and (b) a cross-sectional view from the side.

[0034] As shown in Figures 2(a) and (b), the ventilation device 30 is installed (temporarily installed) using a pair of support members 40 fixed to each ceiling beam 25, similar to the permanent installation described above. Therefore, the temporary installation structure of the ventilation device 30 is generally the same as the permanent installation structure of the ventilation device 30. Accordingly, the following explanation will focus on the differences between the temporary installation structure and the permanent installation structure.

[0035] In the temporary installation state of the ventilation device 30, a spacer 50 is interposed between the flange portion 45 (specifically the horizontal plate portion 45b) of the ventilation device 30 and the fixing piece 42 of the support member 40 positioned above it. A spacer 50 is provided for each fixing piece 42, and all of these (six in this embodiment) spacers 50 are interposed between the flange portion 45 and the fixing piece 42. With the spacers 50 interposed, the flange portion 45 is fixed (temporarily fixed) to each fixing piece 42 above it by fixing screws 48. In this case, the flange portion 45 is fixed to each fixing piece 42 with the spacers 50 sandwiched between it and each fixing piece 42. The fixing screws 48 are inserted from below into the holes 47 of the flange portion 45 and screwed into the holes 43 of the fixing piece 42 via the spacers 50.

[0036] Next, the configuration of the spacer 50 will be explained using Figure 3 in addition to Figures 2(a) and (b). Figure 3 is a perspective view showing the spacer 50. As shown in Figures 2(a), (b) and Figure 3, the spacer 50 has a pair of spacer parts 51 arranged spaced apart from each other, and a connecting part 52 that connects each spacer part 51. Each spacer part 51 is a columnar shape extending vertically and is made of wood material. There is an insertion space 53 between each spacer part 51 through which a fixing screw 48 can be inserted.

[0037] The connecting portion 52 is rectangular in shape and, like the spacer portion 51, is made of wood. The connecting portion 52 is provided across the outer surface of each spacer portion 51 and is fixed to each spacer portion 51 with nails or the like. Therefore, the connecting portion 52 connects each spacer portion 51 outside the insertion space 53. In addition, the connecting portion 52 connects the lower parts of each spacer portion 51.

[0038] The spacer 50 is sandwiched between the flange portion 45 and the fixing piece 42 with the fixing screw 48 inserted through its insertion space 53. In this case, each spacer portion 51 of the spacer 50 is positioned on both sides of the fixing screw 48 in the longitudinal direction of the flange portion 45, and in this arrangement, is sandwiched between the flange portion 45 and the fixing piece 42.

[0039] In this way, in the temporary installation state of the ventilation device 30, each flange portion 45 is fixed (temporarily fixed) to the fixing piece 42 via the spacer 50. Therefore, in the temporary installation state of the ventilation device 30, the ventilation device 30 is positioned lower than in the permanent installation state (see Figure 1(a)) by the height dimension of the spacer 50. As a result, in the temporary installation state of the ventilation device 30, the upper end of the ventilation device 30 is positioned lower than the upper end of the building unit 20 (in Figure 2(a), the upper end line of the building unit 20 is shown by a dashed line). In this temporary installation state, the ventilation device 30 is positioned through the opening 35 in the ceiling surface material 27.

[0040] Next, we will explain the installation method for the ventilation device 30 when it is installed on the ceiling of the building unit 20. Figure 5 is a diagram illustrating the installation method of the ventilation device 30. Note that, for the sake of clarity, the ceiling surface material 27 and the joists 29 are not shown in Figure 5.

[0041] First, we will explain the temporary installation work of the ventilation system 30 performed in the unit manufacturing plant. Note that during the temporary installation work, the opening 35 in the ceiling panel 27 is left open. In other words, during the temporary installation work, the intake grille is not attached to the opening 35, and therefore the opening 35 remains open.

[0042] In the unit manufacturing plant, the first step is to attach support members 40 to a pair of adjacent ceiling beams 25 in the ceiling section of the building unit 20, as shown in Figure 5(a). In this step, the beam fixing members 41 (specifically the upper plate portion 41a) of each support member 40 are fixed to the ceiling beams 25 with screws. As a result, each fixing piece 42 of the support member 40 is positioned on the side between the ceiling beams 25.

[0043] Next, as shown in Figure 5(b), a ventilation device placement process is performed in which the ventilation device 30 is placed between the fixing pieces 42 of each support member 40 such that each flange portion 45 (specifically the horizontal plate portion 45b) is positioned below the fixing piece 42 of each support member 40. In this process, the ventilation device 30 is lifted from below the ceiling and placed between the fixing pieces 42 of each support member 40. At this time, the ventilation device 30 is placed through the opening 35 in the ceiling surface material 27. Note that the ventilation device placement process corresponds to the "equipment placement process".

[0044] Next, the ventilation device installation process is performed. In this process, as shown in Figure 5(c), first, with the ventilation device 30 in the position as determined in the ventilation device placement process, fixing screws 48 are inserted from below into each hole 47 (see Figure 2(a)) of each flange portion 45, and these inserted fixing screws 48 are screwed into the holes 43 (see Figure 2(a)) of each fixing piece 42. Then, each flange portion 45 (specifically the horizontal plate portion 45b) is placed on top of the heads 48b of the screwed fixing screws 48. In this case, the flange portion 45 is placed so as to straddle the heads 48b of multiple fixing screws 48. Note that the ventilation device installation process corresponds to the "equipment installation process".

[0045] Next, as shown in Figure 5(d), a spacer placement step is performed in which spacers 50 are placed between the flange portion 45 and the fixing piece 42 on both sides of the ventilation device 30. In this step, spacers 50 are placed between the flange portion 45 (specifically the horizontal plate portion 45b) and each fixing piece 42 located above it (see also Figure 2(b)). Therefore, in this step, a spacer 50 is placed for each fixing piece 42 of the support member 40. Also in this step, with the fixing screw 48 inserted through the insertion space 53 of the spacer 50, each spacer portion 51 of the spacer 50 is placed between the flange portion 45 and the fixing piece 42 (see Figure 2(b)).

[0046] Next, as shown in Figure 5(e), with the spacers 50 in place as determined by the spacer placement process, a temporary flange fixing process is performed in which each flange portion 45 is temporarily fixed to each fixing piece 42 via the spacers 50 by tightening each fixing screw 48. In this case, each flange portion 45 is temporarily fixed to each fixing piece 42 above it via the spacers 50. Also, in this case, the flange portion 45 is temporarily fixed to the fixing piece 42 via each spacer portion 51 of the spacers 50 (see Figure 2(b)). Note that the "temporary fixing process" consists of the spacer placement process and the temporary flange fixing process.

[0047] Through the above steps (support member installation step to flange temporary fixing step), the ventilation device 30 is temporarily installed between each ceiling beam 25.

[0048] Next, a unit transport process is carried out in which the building unit 20 is transported by truck from the unit manufacturing plant to the construction site with the ventilation device 30 in a temporary installation state. As described above, in the temporary installation state of the ventilation device 30, the ventilation device 30 is positioned so that it does not protrude above the upper end of the building unit 20. Therefore, in this case, it is possible to transport the building unit 20 to the construction site in a suitable manner. After transporting the building unit 20 to the construction site, the building unit 20 is installed in the designated location using a crane or the like.

[0049] Next, we will explain the installation work (main installation work) of the ventilation device 30 to be performed at the construction site. At the construction site, first, as shown in Figure 5(f), the spacer removal process is performed by loosening each fixing screw 48 and removing the spacers 50 from between the flange portion 45 and the fixing piece 42 on both sides of the ventilation device 30. In this process, all spacers 50 that are positioned between the flange portion 45 and each fixing piece 42 are removed.

[0050] Furthermore, each removed spacer 50 is subsequently used for the temporary installation of ventilation devices 30 in other building units 20. In other words, each spacer 50 is reused, and therefore, after being removed, it is collected and stored.

[0051] Next, the final fixing process is performed. In this final fixing process, first, as shown in Figure 5(g), each fixing screw 48 is tightened upward (i.e., tightened into the hole 43 of the fixing piece 42), thereby pushing each flange portion 45, which is placed on the head 48b of each fixing screw 48, upward together with the ventilation device 30. Then, by pushing it upward, each flange portion 45 is brought into contact with the fixing piece 42 from below, and in this contact state, each flange portion 45 is fixed (finally fixed) to the fixing piece 42. As a result, the ventilation device 30 is permanently installed between each ceiling beam 25.

[0052] In the permanently installed state of the ventilation device 30, the ventilation device 30 is positioned higher than in the temporary installation state by the height dimension of the spacer 50. Therefore, in the permanently installed state of the ventilation device 30, it is possible to position the ventilation device 30 above the ceiling surface material 27, that is, above the ceiling surface material 27 which is normally positioned at a different height. As a result, it is possible to install the ventilation device 30 in the ceiling of the building unit 20 without having to install a dropped ceiling.

[0053] After that, the series of operations is completed by attaching an intake grille to the opening 35 in the ceiling panel 27.

[0054] As described in detail above, the configuration of this embodiment provides the following excellent effects.

[0055] At the construction site, the spacer 50 was removed (spacer removal process), and the fixing screws 48 were tightened upwards to raise the ventilation device 30 from the temporary installation position to the permanent installation position (permanent fixing process). Specifically, the ventilation device 30 was raised to a position where each flange portion 45 abutted against the fixing piece 42, and the flange portion 45 was fixed to the fixing piece 42 at that abutment position to permanently install the ventilation device 30. In this case, when permanently installing the ventilation device 30, it is only necessary to raise the ventilation device 30 until the flange portion 45 abuts against the fixing piece 42, eliminating the need for positioning work. Therefore, the ventilation device 30 can be easily permanently installed. Furthermore, when permanently installing, the fixing screws 48 used during temporary installation can be tightened as is, which also makes permanent installation easier.

[0056] Furthermore, since the ventilation device 30 is moved to its permanent installation position by raising it from its temporary installation position, there is no need to separately provide an opening in the ceiling panel 27 for the temporary installation position. In other words, there is no need to provide any other openings in the ceiling panel 27 besides the opening 35. This also has the advantage of avoiding a complex ceiling structure.

[0057] Since the support member 40 has multiple fixing pieces 42, and the flange portion 45 of the ventilation device 30 is fixed to each of these fixing pieces 42, the ventilation device 30 can be installed in a stable state. Furthermore, since the support member 40 is made up of multiple fixing pieces 42 fixed to a long beam fixing member 41, multiple fixing pieces 42 can be installed at once by attaching the beam fixing member 41 to the ceiling joist 25. Therefore, even in a configuration with multiple fixing pieces 42, the installation work of these fixing pieces 42 can be easily carried out.

[0058] Incidentally, since each spacer 50 used for the temporary installation of the ventilation device 30 is removed during permanent installation, it is conceivable that these removed spacers 50 could be reused when temporarily installing the ventilation device 30 in other building units 20. In this regard, in the above embodiment, since each spacer 50 is individually positioned between each fixing piece 42 and flange portion 45 of the support member 40, each spacer 50 can be made compact. Therefore, it is convenient when storing the spacers 50 for reuse after removal.

[0059] During the temporary fixing process, each spacer portion 51 of the spacer 50 is sandwiched between the flange portion 45 and the fixing piece 42 on both sides of the fixing screw 48. As a result, the flange portion 45 can be temporarily fixed to the fixing piece 42 in a stable state. While a similar effect could be obtained by individually placing spacers on both sides of the fixing screw 48, in that case, the temporary fixing work would be more cumbersome. In contrast, with the above configuration, each spacer portion 51 can be placed on both sides of the fixing screw 48 at once, and because the fixing screw 48 fits between each spacer portion 51, displacement of each spacer portion 51 (and thus the spacer 50) is less likely to occur, making the temporary fixing work easier.

[0060] The present invention is not limited to the embodiments described above, and may be implemented, for example, as follows.

[0061] (1) In the above embodiment, the ventilation device 30 was positioned so as not to protrude above the upper end of the building unit 20 when it was temporarily installed. However, the ventilation device 30 may be positioned so as to protrude slightly above the upper end of the building unit 20. In this case as well, when transporting the building unit 20 with the ventilation device 30 temporarily installed, it is possible to transport it smoothly.

[0062] (2) The support member 40 does not necessarily have to be made of wood; it may be made of metal. In that case, the metal support member 40 may be fixed to the ceiling beam 25 by welding in advance.

[0063] (3) In the above embodiment, the support member 40 is configured to have a plurality of fixing pieces 42, but instead of a plurality of fixing pieces 42, a long member (corresponding to the fixing part) extending along the beam fixing member 41 may be fixed to the beam fixing member 41. In this case, a plurality of holes (corresponding to the second hole) corresponding to each hole 47 of the flange portion 45 may be provided in the long member. Then, a plurality of spacers 50 may be placed between the flange portion 45 and the long member, and the flange portion 45 may be temporarily fixed to the long member via the plurality of spacers 50 in this arrangement.

[0064] (4) In a configuration in which a long material is used as the fixing part, as in the example of (3) above, spacers may be placed between adjacent fixing screws 48 between the flange part 45 and the long material. In this case, for example, a rectangular parallelepiped spacer may be used as the spacer.

[0065] (5) In the above embodiment, the present invention was embodied as an installation method for installing a ventilation device 30 on the ceiling of a building unit 20, but the present invention can also be applied when installing equipment other than the ventilation device 30, such as an air conditioning system. [Explanation of Symbols]

[0066] 20...Building unit, 25...Ceiling beam, 30...Ventilation device as equipment, 40...Support member, 41...Beam fixing member, 42...Fixing piece as fixing part, 43...Hole as second hole, 45...Flange part, 47...Hole as first hole, 48...Fixing screw as fastener, 50...Spacer, 51...Spacer part, 52...Connecting part, 53...Passage space.

Claims

1. A method for installing equipment between a pair of adjacent ceiling beams in the ceiling portion of a building unit, The device is provided with a pair of flange portions that protrude laterally toward opposite sides, Each of the flange portions has a first hole that penetrates in the vertical direction. Each of the aforementioned ceiling beams is fitted with a support member having a fixed portion located on the side between the aforementioned ceiling beams. A second hole opening downward is formed in the fixing portion of each of the support members. As a step before transporting the aforementioned building unit to the building construction site, A device arrangement step in which the device is placed between the fixing portions such that each flange portion is located below the fixing portion of each support member, In the equipment placement step, the equipment placement step involves inserting a long fastener from below into the first hole of each flange portion and screwing it into the second hole of each fixing portion, and then placing each flange portion on the head formed at the lower end of each screwed fastener, The process includes a temporary fixing step in which, after the equipment mounting step, spacers are placed between the flange portion and the fixing portion on both sides of the equipment, avoiding the fasteners, and the respective fasteners are tightened in this position to temporarily fix the flange portion to the fixing portion via the spacers, The process after transporting the aforementioned building unit to the building construction site is as follows: A spacer removal step involves loosening each of the fasteners and removing the spacers from between the flange portion and the fixing portion on both sides of the device, A method for installing equipment, comprising: after the spacer removal step, tightening each fastener upward, thereby pushing upward the flange portions placed on the heads of each fastener together with the equipment, and fixing the flange portions to the fixing portion while they are in contact with the fixing portion.

2. The aforementioned support member is A long beam fixing member is positioned along the ceiling beam and fixed to the ceiling beam, The beam fixing member has a plurality of fixing parts that are spaced apart in the longitudinal direction of the beam fixing member and are each fixed to the beam fixing member. Multiple first holes are formed in the flange portion, corresponding to the multiple fixing portions. Prior to the equipment placement step, the process includes attaching the beam fixing members of the support members to the ceiling beams such that each fixing portion is located on the side between each ceiling beam, In the equipment mounting step, the fasteners are inserted into each of the first holes of the flange portion and screwed into the second holes of each of the fixing portions of the support member, and the flange portion is mounted so that it straddles the heads of the multiple fasteners that have been screwed in. In the temporary fixing step, the spacers are placed between each of the fixing portions of the support member and the flange portion, and the flange portion is temporarily fixed to each of the fixing portions of the support member via these spacers. In the spacer removal step, the spacers are removed from between each of the fixing parts and the flange parts. The method for installing equipment according to claim 1, wherein in the fixing step, the flange portion is pushed up and fixed to each of the fixing portions of the support member by tightening each of the plurality of fasteners.

3. The spacer has a pair of spacer portions that are spaced apart from each other to form an insertion space between them through which the fastener can be inserted, and a connecting portion that connects the spacer portions outside the insertion space. The method for installing equipment according to claim 1 or 2, wherein in the temporary fixing step, the fastener is inserted into the insertion space, the spacers are placed between the flange and the fixing part, and the flange is temporarily fixed to the fixing part via the spacers by tightening the fastener in that position.

4. The method for installing equipment according to claim 1, wherein in the temporary fixing state achieved by the temporary fixing step, the equipment is positioned so as not to protrude above the upper end of the building unit.

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