Reinforcement structure and reinforcing metal fittings

Abstract

To prevent an unreinforced part of a hanging bolt from being bent by an earthquake.SOLUTION: A reinforcing structure to reinforce hanging bolts 11 includes: multiple hanging bolts 11 to support a ceiling hanging object suspended in the ceiling space; a brace bolt 13 that is disposed in an oblique direction between the pair of hanging bolts 11, 11, which are arranged at a predetermined interval, with one end of the brace bolt connected to one hanging bolt 11 and the other end connected to the other hanging bolt 11; and a reinforcing metal fitting 20 disposed to cross between the pair of hanging bolts 11, 11 at a height position where the brace bolt 13 is not connected. The reinforcing metal fitting 20 and the pair of hanging bolts 11, 11 are fastened at their respective intersection points.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a reinforcing structure and reinforcing fittings for reinforcing hanging bolts attached to the underside of an upper floor structure in a structure that supports ceiling-suspended objects such as air conditioners in a suspended state by the hanging bolts. [Background technology]

[0002] Conventionally, as a structure for supporting a ceiling-suspended object such as an air conditioner while hanging it in a ceiling space, for example, a structure is known in which the ceiling-suspended object is supported by four suspension bolts attached to the underside of the upper floor structure and hanging down into the ceiling space (for example, Patent Document 1). It is desirable for this type of support structure to suppress the vibration of the ceiling-suspended object when an earthquake occurs. For this reason, when the length of the suspension bolts is a predetermined length or more, a brace bolt is placed between two adjacent suspension bolts as a diagonal reinforcement material. In other words, two brace bolts are placed between the two suspension bolts so that they cross each other. One end of each of these two brace bolts is connected to the upper part of one suspension bolt, and the other end is connected to the lower part of the other suspension bolt.

[0003] 12 is a diagram showing a conventional support structure 300. An air conditioner 100, which is an object suspended from the ceiling, has connection parts 101 on both left and right sides for connecting the lower ends of suspension bolts 11. In addition, one side of the air conditioner 100 has a piping connection part 102 for connecting a refrigerant pipe, and a drain connection part 103 for connecting a drain pipe for discharging water droplets generated inside the air conditioner 100 to the outside. The lower end part of the suspension bolt 301 hanging down from the underside of an upper floor structure 200 such as an upper floor slab into the ceiling space of the floor below is connected to the connection parts 101 provided on both left and right sides of the air conditioner 100, and supports the air conditioner 100 in a suspended state in the ceiling space.

[0004] In such a support structure 300, when the hanging bolt 301 has a predetermined length or more, two brace bolts 302 are arranged to cross between two adjacent hanging bolts 301, 301. That is, brace connecting fittings 310, 310 are attached to two positions, namely, a predetermined upper position Pa and a predetermined lower position Pb, of the hanging bolt 301, and one end of the brace bolt 302 is connected to the brace connecting fitting 310 provided at the predetermined upper position Pa of one hanging bolt 301, and the other end is connected to the brace connecting fitting 310 provided at the predetermined lower position Pb of the other hanging bolt 301. Furthermore, a cross connecting fitting 320 is attached to the intersection of the two brace bolts 302, 302, and the two brace bolts 302, 302 are connected and fixed to each other so that they do not displace relative to each other. [Prior art documents] [Patent documents]

[0005] [Patent Document 2] Patent No. 6635491 Summary of the Invention [Problem to be solved by the invention]

[0006] However, in the conventional support structure 300, the suspension bolt 301 is fixed to the brace bolt 302 at two positions, the upper predetermined position Pa and the lower predetermined position Pb, but the central portion Rc of the suspension bolt 301 between the upper predetermined position Pa and the lower predetermined position Pb is not fixed at all. Therefore, for example, when a large-scale earthquake occurs and a strong lateral force acts on the suspension bolt 301, the central portion Rc of the suspension bolt 301 may be bent in a dogleg shape. If the suspension bolt 301 is bent, the air conditioner 100 cannot be supported in a normal position. In particular, although it is desired that the air conditioner 100 maintain a predetermined position so that water droplets generated inside can be discharged from the drain connection part 103, if the suspension bolt 301 is bent due to an earthquake, the position of the air conditioner 100 changes and water droplets generated inside cannot be discharged from the drain connection part 103 to the outside. Therefore, there is a problem that the air conditioner 100 cannot be operated normally even after the earthquake has subsided.

[0007] The present invention has been made to solve the above-mentioned conventional problems, and its object is to provide a reinforcing structure and reinforcing fitting for a hanging bolt that prevents the unreinforced parts of the hanging bolt from bending due to an earthquake and enables the posture of an object hung from the ceiling to be maintained. [Means for solving the problem]

[0008] In order to achieve the above object, firstly, the present invention provides a reinforcing structure comprising: a plurality of suspension bolts arranged vertically in a ceiling space for supporting a ceiling-suspended object in a suspended state in the ceiling space; a brace bolt arranged diagonally between a pair of suspension bolts arranged at a predetermined interval among the plurality of suspension bolts, the brace bolt having one end connected to one of the pair of suspension bolts and the other end connected to the other of the pair of suspension bolts; and a reinforcing metal fitting arranged so as to cross the pair of suspension bolts at a height position where the brace bolt is not connected, and fastening the intersections of the reinforcing metal fitting and each of the pair of suspension bolts.Further, the intersection of the reinforcing metal fitting and the brace bolt is fastened. The configuration is characterized by the above.

[0010] No. 2 The present invention relates to A reinforcing structure comprising: a plurality of hanging bolts arranged vertically in a ceiling space to support a ceiling-suspended object in a suspended state in the ceiling space; a brace bolt arranged diagonally between a pair of hanging bolts arranged at a predetermined interval, the brace bolt having one end connected to one of the pair of hanging bolts and the other end connected to the other of the pair of hanging bolts; and a reinforcing metal fitting arranged to cross between the pair of hanging bolts at a height position to which the brace bolt is not connected, The brace bolt has one end connected to the upper part of one of the hanging bolts and the other end connected to the lower part of the other hanging bolt, and the reinforcing metal fitting is disposed so as to cross between the pair of hanging bolts at a height position approximately at the center of the hanging bolts. The reinforcing metal fittings and the pair of hanging bolts are fastened at their intersections. The configuration is characterized by the above.

[0011] No. 3 In particular, the present invention relates to the above-mentioned 2 In a support structure having the above configuration, the reinforcing bracket comprises a flat plate member that crosses between the pair of hanging bolts and is arranged so as to contact the outer peripheral surfaces of each of the pair of hanging bolts, and a plurality of fixing members attached to the flat plate member, and the plurality of fixing members are configured to sandwich and fix each of the pair of hanging bolts between the flat plate member and the flat plate member.

[0012] No. 4 In particular, the present invention relates to the above-mentioned 1 In a support structure having the above configuration, the reinforcing bracket comprises a flat plate member that crosses between the pair of hanging bolts and is arranged so as to contact the outer peripheral surfaces of each of the pair of hanging bolts, and a plurality of fixing members attached to the flat plate member, and the plurality of fixing members are configured to sandwich and fix each of the pair of hanging bolts and the brace bolt between the flat plate member and the fixing members.

[0013] No. 5 In particular, the present invention relates to the above-mentioned 3 Or 4 In a support structure having the above configuration, the flat plate member has a rail portion arranged in a direction crossing between the pair of hanging bolts, the fixing member has a fastening member that engages with the rail portion, and is movable along the rail portion when the fastening member is in a temporary fastening state, and is fixed in a state in which it cannot move along the rail portion by tightening the fastening member.

[0014] No. 6 The present invention relates to a structure in which a brace bolt that connects one suspension bolt to the other suspension bolt is disposed diagonally between a pair of suspension bolts that are disposed at a predetermined interval, an object suspended from the ceiling is connected to the lower ends of the pair of suspension bolts, and the structure supports the object suspended from the ceiling in a suspended state in a ceiling space, the structure further comprising a reinforcing metal fitting that is disposed so as to cross the pair of suspension bolts at a height position where the brace bolt is not connected, and the intersections of the reinforcing metal fitting and each of the pair of suspension bolts are fastened. The intersection between the reinforcing metal fitting and the brace bolt is further fastened. This structure is characterized in that the hanging bolt is reinforced.

[0017] No. 7 In particular, the present invention relates to the above-mentioned 6 The reinforcing bracket having the above configuration comprises a flat plate member that crosses between the pair of hanging bolts and is arranged so as to contact the outer peripheral surfaces of each of the pair of hanging bolts, and a plurality of fixing members that are attached to the flat plate member, and the plurality of fixing members fix each of the pair of hanging bolts and the brace bolt by sandwiching them between the flat plate member and the plurality of fixing members.

[0018] No. 8 In particular, the present invention relates to the above-mentioned 7 In a reinforcing bracket having the above configuration, the flat plate member has a rail portion arranged in a direction crossing between the pair of hanging bolts, the fixing member has a fastening member that engages with the rail portion, and is movable along the rail portion when the fastening member is in a temporary fastening state, and is fixed in a state in which it cannot move along the rail portion by tightening the fastening member. Effect of the Invention

[0019] According to the present invention, the portions of the hanging bolts supporting an object hung from the ceiling to which the brace bolts are not connected can be reinforced with reinforcing metal fittings, thereby preventing the hanging bolts from bending due to an earthquake and enabling the posture of the object hung from the ceiling to be maintained properly. [Brief description of the drawings]

[0020] [Figure 1] FIG. 2 is a perspective view showing a support structure by the support device of the first embodiment. [Diagram 2] FIG. 2 is a side view showing a support structure by the support device of the first embodiment. [Diagram 3] 4A to 4C are diagrams showing a specific configuration example of a reinforcing metal fitting in the first embodiment. [Figure 4] 4A to 4C are diagrams showing a specific configuration example of a reinforcing metal fitting in the first embodiment. [Diagram 5] FIG. 4 is an enlarged view of a fixing member. [Figure 6] FIG. 4 is a side view showing another support structure in the first embodiment. [Figure 7] 5A to 5C are diagrams showing the results of a strength test of the support structure in the first embodiment. [Figure 8] FIG. 11 is a side view showing a support structure by the support device of the second embodiment. [Figure 9] 13A to 13C are diagrams showing a specific configuration example of a reinforcing metal fitting in the second embodiment. [Figure 10] FIG. 11 is a perspective view showing a support structure by a support device of a third embodiment. [Figure 11] FIG. 13 is a side view showing a support structure by a support device of a third embodiment. [Figure 12] FIG. 1 is a diagram showing a conventional support structure. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0021] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the drawings referred to below, common members are designated by the same reference numerals, and redundant description thereof will be omitted.

[0022] (First embodiment) First, a first embodiment of the present invention will be described. FIG. 1 is a perspective view showing a support structure using a support device 1 according to the first embodiment of the present invention. This support device 1 is a device for supporting a ceiling-suspended object in a state where it is suspended in a ceiling space. In this embodiment, a concealed air conditioner 100 is exemplified as a ceiling-suspended object. The concealed air conditioner 100 is an air conditioner that is installed in a concealed state in a ceiling space between an upper floor structure such as a floor slab or deck plate that forms the floor of the upper floor and a ceiling panel. FIG. 1 shows a support structure in which the support device 1 is assembled to the air conditioner 100. Also, FIG. 2 is a side view of the support structure of the air conditioner 100 using the support device 1 shown in FIG. The XYZ three-dimensional coordinate system shown in each of these figures is a coordinate system in which the XY plane is the horizontal plane and the Z direction is the vertical direction, and is a coordinate system that is common to other figures.

[0023] The air conditioner 100, which is a ceiling-suspended object, is a box-shaped unit that is generally rectangular in plan view. In this embodiment, the left-right direction of the air conditioner 100 is a direction parallel to the X direction in an XYZ three-dimensional coordinate system, and the front-rear direction is a direction parallel to the Y direction in the same coordinate system. The air conditioner 100 has connection parts 101 for connecting bolt members on both left and right sides. The air conditioner 100 is supported in a suspended state in the ceiling space by connecting bolt members to the connection parts 101. In the illustrated example, the connection part 101 is provided at the lower side of the air conditioner 100, but is not limited to this, and may be provided at the center of the side of the air conditioner 100 or at the upper side of the air conditioner 100. The air conditioner 100 is provided with operating mechanisms such as a heat exchanger and a fan inside, and a piping connection part 102 for connecting a refrigerant piping for circulating a refrigerant to the heat exchanger is provided on the side of the air conditioner. Furthermore, the air conditioner 100 is provided on its side with a drain connection portion 103 for connecting a drain pipe for discharging water droplets generated inside to the outside.

[0024] The support device 1 of this embodiment is configured to support the connection parts 101 provided on both the left and right side surfaces of the air conditioner 100 as described above. This support device 1 includes a hanging bolt 11, a brace connecting metal fitting 12, a brace bolt 13, and a reinforcing metal fitting 20, and a support structure that supports the air conditioner 100 is formed by assembling each of these members.

[0025] The hanging bolt 11 is a hanging member that supports the air conditioner 100 in a suspended state in the ceiling space, and is formed, for example, by a long bolt member with a male screw formed on the outer periphery. As shown in FIG. 2, this hanging bolt 11 is installed so as to hang down from the underside of an upper floor structure 200 such as an upper floor slab into the ceiling space of the floor below. The lower end of the hanging bolt 11 is connected to a connection part 101 of the air conditioner 100, and supports the air conditioner 100 at a predetermined height. In this embodiment, four hanging bolts 11 are installed on the underside of the upper floor structure 200, and these four hanging bolts 11 support the air conditioner 100 at four points on both the left and right sides.

[0026] The brace connecting fitting 12 is a fitting for connecting the brace bolt 13 between two adjacent hanging bolts 11, 11. For example, the brace connecting fitting 12 is an L-shaped fitting in a plan view, and has a fixing portion for fixing the hanging bolt 11 at a corner portion, and the brace bolts 13 are connected and fixed to each of a pair of connecting portions that extend from the fixing portion in a direction perpendicular to each other. Such a brace connecting fitting 12 is attached to two positions, the upper and lower portions of the hanging bolt 11. For example, as shown in FIG. 2, the brace connecting fitting 12 attached to the upper portion of the hanging bolt 11 is attached at a height position close to the lower surface of the upper floor structure 200. Also, the brace connecting fitting 12 attached to the lower portion of the hanging bolt 11 is attached at a height position close to the upper surface of the air conditioner 100.

[0027] The brace bolt 13 is an oblique reinforcing member disposed in an oblique direction between two adjacent hanging bolts 11, 11, and is formed of, for example, a long bolt member having a male screw formed on the outer circumferential surface, similar to the hanging bolt 11. The brace bolt 13 is disposed between two adjacent hanging bolts 11, 11 in a plane parallel to the XZ plane or the YZ plane. As shown in FIG. 1 and FIG. 2, two brace bolts 13, 13 are disposed between a pair of hanging bolts 11, 11 to be reinforced so as to cross each other. That is, one end of the brace bolt 13 is connected to a brace connecting fitting 12 provided on the upper part of one hanging bolt 11, and the other end is connected to a brace connecting fitting 12 provided on the lower part of the other hanging bolt 11. The two brace bolts 13 are connected to the upper and lower parts of the two hanging bolts 11, 11 in a state where they cross each other, so that the two hanging bolts 11, 11 are fixed in a state where the upper and lower two parts are connected to each other. By arranging the brace bolts 13 as described above on two faces parallel to the XZ plane and two faces parallel to the YZ plane, the upper and lower parts of the four suspension bolts 11 are interconnected. This makes it possible to prevent the upper and lower parts of the four suspension bolts 11 from vibrating significantly in the event of an earthquake, and also makes it possible to suppress vibration of the air conditioner 100.

[0028] The reinforcing metal fitting 20 is a metal fitting that reinforces the central portion (portion not reinforced by the brace bolt 13) of the hanging bolt 11 arranged in the vertical direction. This reinforcing metal fitting 20 is longer than the interval between a pair of adjacent hanging bolts 11, 11, and is arranged so as to cross between the pair of hanging bolts 11, 11 at a height position approximately at the center of the hanging bolts 11. For example, the reinforcing metal fitting 20 is arranged in the horizontal direction, and both ends thereof are arranged so as to intersect with each of the pair of hanging bolts 11, 11. However, the reinforcing metal fitting 20 is not necessarily limited to being arranged in the horizontal direction, and may be arranged so as to cross between the pair of hanging bolts 11, 11 in a slightly inclined state.

[0029] 2, the reinforcing metal fitting 20 is fastened at intersections P1, P2 where it intersects with each of a pair of hanging bolts 11, 11, and fixed to each of the hanging bolts 11, 11. The reinforcing metal fitting 20 is also fastened at intersections P3, P4 where it intersects with each of the brace bolts 13, 13, and fixed to each of the brace bolts 13, 13. In this way, the reinforcing metal fitting 20 connects the central portions of the hanging bolts 11, 11 to each other, and also connects the central portions of the hanging bolts 11, 11 to the brace bolts 13, 13. The reinforcing metal fitting 20 reinforces the central portions of the hanging bolts 11, 11 with this reinforcing structure.

[0030] 3 and 4 are diagrams showing a specific configuration example of the reinforcing bracket 20 in this embodiment. Fig. 3 shows an example in which the reinforcing bracket 20 is attached to the hanging bolt 11 and the brace bolt 13, and Fig. 4 shows a state in which each component of the reinforcing bracket 20 is disassembled. The reinforcing bracket 20 includes a flat plate member 21 that crosses between a pair of hanging bolts 11, 11 that are to be reinforced and is arranged so as to contact the outer circumferential surfaces of each of the pair of hanging bolts 11, 11, and a plurality of fixing members 26 that are attached to the flat plate member 21, and the hanging bolts 11, 11 and the brace bolts 13, 13 are sandwiched and fixed between the flat plate member 21 and the plurality of fixing members 26.

[0031] 4, the flat plate member 21 has a double plate structure in which a front plate 23 and a back plate 22 are arranged at a predetermined interval, and a space 24 is provided between the front plate 23 and the back plate 22. A rail portion 25 is provided in the center of the front plate 23 along the longitudinal direction of the flat plate member 21. The rail portion 25 is formed by a slit formed along the longitudinal direction of the front plate 23, and is provided from one end of the flat plate member 21 to the other end. In other words, the rail portion 25 is open at both ends of the flat plate member 21.

[0032] The fixing member 26 has a fastening member 27, and is attached to the flat plate member 21 by the fastening member 27. As shown in FIG. 4, the fastening member 27 is composed of a bolt 28 and a nut 29. The bolt 28 has a rectangular flat bolt head 28a and a bolt shank 28b extending vertically from the center of the bolt head 28a. A male screw that screws into the nut 29 is formed on the outer circumferential surface of the bolt shank 28b. The bolt head 28a can be accommodated in the space 24 formed between the front plate 23 and the back plate 22 of the flat plate member 21, and the bolt shank 28b protrudes from the rail portion 25 of the flat plate member 21 to the front surface side. The fixing member 26 is attached to the bolt shank 28b protruding to the front surface side of the flat plate member 21 as described above, and is attached to the flat plate member 21 by attaching a nut 29 to the tip of the bolt shank 28b.

[0033] FIG. 5 is an enlarged view of the fixing member 26. Note that FIGS. 5(a) and 5(b) are perspective views of the fixing member 26 viewed from different sides. The fixing member 26 is a member formed by bending a metal plate of a predetermined shape, and has a flat plate portion 41 and a wall portion 42 formed by bending the peripheral portion of the flat plate portion 41 at a substantially right angle in a predetermined direction. A hole 43 through which the bolt shaft portion 28b is inserted is formed in the center of the flat plate portion 41. In addition, a pair of wall portions 42 facing each other across the flat plate portion 41 are provided with U-shaped notches 44 that engage with the outer circumferential surfaces of the hanging bolt 11 and the brace bolt 13. The depth of the notches 44 is smaller than the diameters of the hanging bolt 11 and the brace bolt 13. The fixing member 26 is arranged with the notch 44 facing the front plate 23 of the flat plate member 21, the bolt shaft 28b is inserted into the hole 43 of the flat plate member 41, and the nut 29 is attached to the tip of the bolt shaft 28b. Since the fixing member 26 can rotate about the bolt shaft 28b, the outer peripheral surface of the hanging bolt 11 arranged in the vertical direction and the brace bolt 13 arranged in the diagonal direction can be engaged with the notch 44. Then, the fixing member 26 fixes the hanging bolt 11 or the brace bolt 13 in a sandwiched state between the fixing member 26 and the flat plate member 21 by tightening the nut 29 with the hanging bolt 11 or the brace bolt 13 accommodated inside the notch 44. At this time, the notch 44 of the fixing member 26 engages with the male screw formed on the outer peripheral surface of the hanging bolt 11 or the brace bolt 13, so that even if an earthquake occurs, the hanging bolt 11 or the brace bolt 13 can be prevented from slipping in the axial direction.

[0034] Furthermore, when the nut 29 is in a provisionally fastened state, the fixing member 26 is movable along the rail portion 25. Therefore, the fixing member 26 can fix the hanging bolt 11 or the brace bolt 13 to the flat plate member 21 at any position in the longitudinal direction of the flat plate member 21. When the nut 29 is tightened to the bolt shank portion 28b, the fixing member 26 is rendered unable to move along the rail portion 25, and the hanging bolt 11 or the brace bolt 13 is fixed to a predetermined position of the flat plate member 21.

[0035] For example, the reinforcing metal fitting 20 of this embodiment is disposed near the upper or lower side of the position where the two brace bolts 13, 13 intersect. That is, the reinforcing metal fitting 20 is disposed near the intersection position of the two brace bolts 13, 13. Therefore, one brace bolt 13 can be joined to the front plate 23 of the flat plate member 21, whereas the other brace bolt 13 cannot be joined to the front plate 23 of the flat plate member 21, and is in a floating state from the front plate 23 of the flat plate member 21. Therefore, the reinforcing metal fitting 20 of this embodiment is provided with a spacer 30 to indirectly join the floating brace bolt 13 to the flat plate member 21, as shown in FIG. 4. The spacer 30 is made of a metal plate having a thickness approximately equal to the diameter of the brace bolt 13, and a hole through which the bolt shaft portion 28b is inserted is formed at a predetermined position. The bolt shaft portion 28b is inserted into the hole, and the spacer 30 is disposed in a state of being joined to the flat plate member 21. The brace bolt 13 is fixed in a state where it is sandwiched between the spacer 30 and the fixing member 26. This prevents the brace bolt 13 from floating above the flat plate member 21, and therefore the brace bolt 13 is firmly fixed to the flat plate member 21. Note that if the reinforcing bracket 20 is installed in a position away from the position where the two brace bolts 13, 13 intersect, it may not be necessary to provide the spacer 30 as described above.

[0036] In the support device 1 configured as described above, the reinforcing metal fitting 20 is placed across a pair of hanging bolts 11, 11, and the intersections P1, P2 between the reinforcing metal fitting 20 and the hanging bolts 11, 11 are fastened using the fastening member 27, and the intersections P3, P4 between the reinforcing metal fitting 20 and the brace bolts 13, 13 are also fastened using the fastening member 27. Therefore, the support device 1 is structured such that the central portion of the hanging bolts 11, 11 arranged in the vertical direction that is not reinforced by the brace bolts 13, 13 can be reinforced by the reinforcing metal fitting 20. With such a reinforcing structure, even if a large-scale earthquake such as the Great East Japan Earthquake occurs, it is possible to prevent the unreinforced portion of the hanging bolt (for example, the central portion) from bending, and the posture of the air conditioner 100 can be maintained in a good condition. Therefore, there is an advantage in that the air conditioner 100 can be operated normally as soon as possible after the earthquake has subsided.

[0037] In the above, an example has been described in which the intersections P1, P2 between the reinforcing metal fitting 20 and the hanging bolts 11, 11 are fastened, and further the intersections P3, P4 between the reinforcing metal fitting 20 and the brace bolts 13, 13 are fastened, but for example, as shown in Fig. 6, a support structure may be adopted in which only the intersections P1, P2 between the reinforcing metal fitting 20 and the hanging bolts 11, 11 are fastened, and the intersections P3, P4 between the reinforcing metal fitting 20 and the brace bolts 13, 13 are not fastened. This is because even with a support structure in which the intersections P3, P4 between the reinforcing metal fitting 20 and the brace bolts 13, 13 are not fastened, the strength of the hanging bolts 11, 11 can be improved compared to the conventional support structure 300.

[0038] FIG. 7 is a diagram showing the results of a strength test of the support structure in this embodiment. In this strength test, as shown in FIG. 2 and FIG. 6, for example, a load F was applied in the Y direction to one end surface 110 of the ceiling-suspended object using a hydraulic cylinder or the like, and the displacement amount of the other end surface 120 of the ceiling-suspended object in the Y direction was measured. The test results shown in FIG. 7 are plotted on the vertical axis for the load F applied to the ceiling-suspended object and on the horizontal axis for the displacement amount of the ceiling-suspended object. The test result 401 shown in FIG. 7 is the test result of a reinforcing structure in which a reinforcing metal fitting 20 is placed between a pair of suspension bolts 11, 11, and intersections P1, P2 between the reinforcing metal fitting 20 and the suspension bolts 11, 11 are fastened, and intersections P3, P4 between the reinforcing metal fitting 20 and the brace bolts 13, 13 are also fastened, as shown in FIG. 2. 7 is a test result for a reinforcement structure in which the reinforcing metal fitting 20 is placed between a pair of hanging bolts 11, 11, and only the intersections P1, P2 between the reinforcing metal fitting 20 and the hanging bolts 11, 11 are fastened, while the intersections P3, P4 between the reinforcing metal fitting 20 and the brace bolts 13, 13 are not fastened, as shown in Fig. 6. Furthermore, the test result 403 shown in Fig. 7 is a test result for the conventional reinforcement structure 300 shown in Fig. 12.

[0039] As shown in the test result 403 in Fig. 7, in the conventional support structure 300, when the load is 2.0 kN, the displacement of the ceiling-suspended object in the Y direction increases abruptly, and it is understood that the load-bearing capacity of the support structure 300 reaches its limit. In other words, the conventional support structure 300 has an upper limit of 2.0 kN as its horizontal load-bearing capacity.

[0040] On the other hand, in the case of the support structure shown in Fig. 6, as shown in test result 402, when the load is 2.5 kN, the displacement of the object suspended from the ceiling in the Y direction increases suddenly, and it is found that the load-bearing capacity of the support structure reaches its limit. In other words, the support structure shown in Fig. 6 has an upper limit of 2.5 kN as the horizontal load-bearing capacity, and has improved load-bearing capacity compared to the conventional support structure 300. Therefore, even when the support structure shown in Fig. 6 is adopted, the strength of the hanging bolts 11, 11 can be increased compared to the conventional support structure 300.

[0041] Furthermore, in the case of the support structure shown in FIG. 2, as shown in the test result 401, when the load is about 3.5 kN, the displacement amount of the ceiling suspended object in the Y direction increases suddenly, and it is understood that the load-bearing performance of the support structure reaches its limit. In other words, the support structure shown in FIG. 2 has an upper limit of about 3.5 kN as the horizontal load-bearing performance, and has improved load-bearing performance compared to the conventional support structure 300. It is also understood that the support structure shown in FIG. 2 has improved load-bearing performance even more than the support structure shown in FIG. 6. Therefore, when the support structure shown in FIG. 2 is adopted, the strength of the hanging bolts 11, 11 can be improved the most. Therefore, the support structure shown in FIG. 2 is the most preferable support structure from the viewpoint of reinforcing the hanging bolts 11, 11.

[0042] Second embodiment Next, a second embodiment of the present invention will be described. Fig. 8 is a side view showing a support structure using a support device 1 according to the second embodiment of the present invention. The support device 1 in this embodiment differs from the first embodiment in the reinforcing metal fitting 20. That is, the reinforcing metal fitting 20 of this embodiment uses a connecting bolt 51 instead of the above-mentioned flat plate member 21. The connecting bolt 51 is a long bolt member that is arranged to cross between a pair of adjacent hanging bolts 11, 11 at a height position approximately at the center of the hanging bolts 11 arranged in the vertical direction, and like the hanging bolts 11 and the brace bolts 13, for example, a male thread is formed on the outer circumferential surface.

[0043] 9 is a diagram showing a specific configuration example of the reinforcing bracket 20 in this embodiment, showing a state in which each component of the reinforcing bracket 20 has been disassembled. The reinforcing bracket 20 includes a connecting bolt 51 that crosses between a pair of suspension bolts 11, 11 to be reinforced and is arranged so as to contact the outer circumferential surfaces of each of the pair of suspension bolts 11, 11, and a plurality of fixing members 26 that are attached to the connecting bolt 51. The reinforcing bracket 20 of this embodiment also includes a spacer 30 similar to that of the first embodiment.

[0044] As shown in FIG. 9, the connecting bolt 51 is longer than the installation interval of the pair of hanging bolts 11, 11 to be reinforced, and is disposed so that both ends of the connecting bolt 51 are joined to the pair of hanging bolts 11, respectively. The intersection of the connecting bolt 51 and the hanging bolt 11 is fixed by two fixing members 26, 26. That is, the two fixing members 26, 26 are disposed to face each other across the intersection of the connecting bolt 51 and the hanging bolt 11, and in a state in which the two fixing members 26, 26 sandwich the hanging bolt 11 and the connecting bolt 51, the fastening member 27 consisting of a bolt 53 and a nut 54 tightens the two fixing members 26, 26 in the compression direction, thereby fixing the connecting bolt 51 to a predetermined position of the hanging bolt 11. At this time, the male screw formed on the outer circumferential surface of the connecting bolt 51 and the male screw formed on the outer circumferential surface of the hanging bolt 11 engage with each other, so that the connecting bolt 51 and the hanging bolt 11 are firmly fixed to each other so that axial slippage does not occur.

[0045] Similarly to the above, the intersection of the connecting bolt 51 and the two brace bolts 13 is basically fixed by two fixing members 26, 26. For example, similar to the first embodiment, the reinforcing bracket 20 of this embodiment is disposed in the vicinity of the upper or lower side of the position where the two brace bolts 13 intersect. Therefore, while one of the two brace bolts 13 can be joined to the connecting bolt 51, the other brace bolt 13 may be floating from the connecting bolt 51.

[0046] The two fixing members 26, 26 can be used to fix the joint between the brace bolt 13 and the connecting bolt 51. That is, the two fixing members 26, 26 are arranged to face each other across the intersection between the brace bolt 13 and the connecting bolt 51, and the two fixing members 26, 26 are clamped between the brace bolt 13 and the connecting bolt 51. The bolt 53 and the nut 54 tighten the two fixing members 26, 26 in the compression direction, thereby fixing the connecting bolt 51 to a predetermined position of the brace bolt 13. At this time, the male thread formed on the outer circumferential surface of the connecting bolt 51 and the male thread formed on the outer circumferential surface of the brace bolt 13 engage with each other, so that the brace bolt 13 and the connecting bolt 51 are firmly fixed to each other without axial slippage. In addition,

[0047] In contrast, when fixing the location where the brace bolt 13 and the connecting bolt 51 are in a floating state, the brace bolt 13 and the connecting bolt 51 are fixed to the spacer 30 using the two fixing members 26, 26 in a state where the spacer 30 is used as in the first embodiment. In this case, the brace bolt 13 and the connecting bolt 51 are fixed to each other via the spacer 30 by tightening the two fixing members 26, 26 in the compression direction with the bolt 53 and the nut 54. Note that, when the reinforcing bracket 20 is installed at a position away from the position where the two brace bolts 13, 13 intersect, the spacer 30 may not be provided. Also, when the connecting bolt 51 is installed in a state where it is inserted between the two brace bolts 13, 13, each of the two brace bolts 13, 13 can be joined to the connecting bolt 51, so the spacer 30 may not be provided.

[0048] In the support device 1 equipped with the reinforcing metal fitting 20 as described above, the reinforcing metal fitting 20 is placed across a pair of hanging bolts 11, 11, and the intersections of the reinforcing metal fitting 20 and the hanging bolts 11, 11 are fastened using fastening members 27, and the intersections of the reinforcing metal fitting 20 and the brace bolts 13, 13 are also fastened using fastening members 27. Therefore, the support device 1 of this embodiment has a structure in which the central portions of the hanging bolts 11, 11 arranged in the vertical direction that are not reinforced by the brace bolts 13, 13 can be reinforced by the reinforcing metal fitting 20, similar to the first embodiment.

[0049] Further, the reinforcing bracket 20 of this embodiment is configured to fix each of the hanging bolts 11 and the brace bolts 13 to the connecting bolt 51. The connecting bolt 51 is less expensive than the flat plate member 21 of the first embodiment, and therefore has the advantage of being able to reinforce the hanging bolts 11, 11 at low cost.

[0050] In addition, other than the above-mentioned points, this embodiment is similar to that described in the first embodiment.

[0051] Third embodiment Next, a third embodiment of the present invention will be described. Figures 10 and 11 are diagrams showing a support structure using a support device 1 according to the third embodiment of the present invention, with Figure 10 showing a perspective view and Figure 11 showing a side view. The support device 1 of this embodiment is a device that can be suitably used when the suspension bolts 11 supporting the air conditioner 100 are longer than those of the first and second embodiments.

[0052] For example, the brace bolts 13, 13 disposed between a pair of hanging bolts 11, 11 exhibit sufficient reinforcing strength when the angle is about 30 degrees to 60 degrees. On the other hand, when the angle of the brace bolts 13, 13 is less than 30 degrees or exceeds 60 degrees, the hanging bolts 11, 11 cannot be reinforced with sufficient strength. Therefore, when the length H of the hanging bolt 11 hanging down from the upper floor structure 200 becomes long, simply attaching the brace connecting fittings 12 to two places, the upper and lower parts of the hanging bolt 11 as described in the first and second embodiments, the angle of the brace bolts 13, 13 exceeds 60 degrees, and the hanging bolt 11 cannot be reinforced with sufficient strength.

[0053] Therefore, as shown in Fig. 10 and Fig. 11, the support device 1 of this embodiment is configured such that the angle of the brace bolt 13 is within a range of 30 degrees to 60 degrees by crossing two brace bolts 13, 13 at each of the upper and lower parts of the hanging bolt 11 arranged in the vertical direction, thereby providing sufficient reinforcing strength. This support device 1 includes a bolt connecting metal fitting 60 attached to the center of the hanging bolt 11. The bolt connecting metal fitting 60 connects the lower end of the brace bolt 13 arranged in an oblique direction at the upper part of the hanging bolt 11 to the hanging bolt 11, and also connects the upper end of the brace bolt 13 arranged in an oblique direction at the lower part of the hanging bolt 11 to the hanging bolt 11. In addition, the bolt connecting metal fitting 60 connects and fixes the end of the bolt member 59 arranged in a substantially horizontal direction between the pair of hanging bolts 11, 11 to the hanging bolt 11.

[0054] The upper ends of the brace bolts 13, 13 arranged to intersect with each other above the hanging bolt 11 are connected to the upper part of the hanging bolt 11 by the brace connecting fitting 12 described in the first and second embodiments. Also, the lower ends of the brace bolts 13, 13 arranged to intersect with each other below the hanging bolt 11 are connected to the lower part of the hanging bolt 11 by the brace connecting fitting 12 described in the first and second embodiments.

[0055] Furthermore, in the support device 1 of this embodiment, the reinforcing metal fittings 20 described in the first embodiment are disposed so as to cross between a pair of suspension bolts 11, 11 at an intermediate position between the brace connection fitting 12 above the suspension bolt 11 and the bolt connection fitting 60, and at an intermediate position between the brace connection fitting 12 below the suspension bolt 11 and the bolt connection fitting 60, and are fastened and fixed to each of the suspension bolt 11 and the brace bolt 13. That is, in the support device 1 of this embodiment, the reinforcing metal fittings 20 are disposed in two positions, one above and one below.

[0056] In this way, in the support device 1 of this embodiment, when the length H of the hanging bolts 11, 11 relative to the spacing between the pair of hanging bolts 11, 11 to be reinforced is longer than a predetermined ratio, the reinforcing structure using the brace bolts 13 is configured in two levels, upper and lower, and the reinforcing metal fittings 20 are placed in the center of each of the upper and lower levels, thereby partially reinforcing the hanging bolts 11 in each of the upper and lower levels that are not reinforced by the brace bolts 13. With this reinforcing structure, sufficient reinforcing strength can be obtained even when the length H of the hanging bolts 11 is long, and the hanging bolts 11 can be prevented from bending in an L-shape when an earthquake occurs.

[0057] In addition, Figures 10 and 11 show an example in which a bolt connecting fitting 60 and a bolt member 59 are attached to the central portion of the hanging bolt 11, but instead of the bolt connecting fitting 60 and the bolt member 59, fittings similar to the reinforcing fittings 20 arranged on the upper and lower tiers may be arranged.

[0058] In addition, in this embodiment, an example has been described in which the reinforcing bracket 20 described in the first embodiment is used, but this is not limited to this, and for example, the reinforcing bracket 20 described in the second embodiment may also be used.

[0059] Furthermore, in this embodiment, an example has been described in which the reinforcement structure using the brace bolts 13 is configured in two stages, upper and lower, but if the length H of the hanging bolts 11 becomes longer, the reinforcement structure using the brace bolts 13 may be configured in three or more stages.

[0060] (Modification) Although several preferred embodiments of the present invention have been described above, the present invention is not limited to those described in the above embodiments. In other words, the present invention includes those in which various modifications are applied to those described in the above embodiments.

[0061] For example, in the above embodiment, the air conditioner 100 is given as an example of a ceiling-hanging object, and the support device 1 directly supports the air conditioner 100. However, the present invention is not limited to this, and for example, when a frame body is integrally attached to the air conditioner 100, the support device 1 can support the integrated object of the air conditioner 100 and the frame body as a ceiling-hanging object. Furthermore, the ceiling-hanging object is not necessarily limited to an air conditioner. In other words, the support device 1 described above is a device that can support any ceiling-hanging object in a state where it is hung from the underside of the upper floor structure.

[0062] Also, the support device 1 described in the above embodiment has been exemplified as a case where a ceiling-suspended object is suspended in a ceiling space by four suspension bolts 11. However, the support device 1 is not limited to this, and may be one that supports a ceiling-suspended object by at least two suspension bolts 11. This is because the above-mentioned reinforcing structure can be applied as long as two suspension bolts 11 are installed with a predetermined distance between them.

[0063] Also, in the above embodiment, an example has been described in which the reinforcing bracket 20 is disposed at a height position near the intersection where the two brace bolts 13, 13 intersect. However, the height position at which the reinforcing bracket 20 is disposed is not necessarily limited to a position near the intersection where the two brace bolts 13, 13 intersect. For example, when the reinforcing bracket 20 is attached at a position away from the intersection where the two brace bolts 13, 13 intersect with each other, a cross connecting bracket 320 similar to that of the prior art may be attached to the intersection where the two brace bolts 13, 13 intersect. [Explanation of symbols]

[0064] 1...support device, 11...suspension bolt, 13...brace bolt, 20...reinforcement metal fitting, 21...flat plate member, 25...rail portion, 26...fixing member, 27...fastening member, 100...air conditioner (ceiling-suspended object).

Claims

1. A plurality of hanging bolts arranged vertically in the ceiling space and supporting a ceiling-suspended object in a suspended state in the ceiling space; a brace bolt disposed diagonally between a pair of hanging bolts arranged at a predetermined interval, the brace bolt having one end connected to one of the pair of hanging bolts and the other end connected to the other of the pair of hanging bolts; A reinforcing metal fitting disposed so as to cross between the pair of suspension bolts at a height position where the brace bolt is not connected; Equipped with A reinforcing structure characterized in that the intersections of the reinforcing metal fittings and each of the pair of hanging bolts are fastened, and further the intersections of the reinforcing metal fittings and the brace bolts are fastened.

2. A plurality of hanging bolts arranged vertically in the ceiling space and supporting a ceiling-suspended object in a suspended state in the ceiling space; a brace bolt disposed diagonally between a pair of hanging bolts arranged at a predetermined interval, the brace bolt having one end connected to one of the pair of hanging bolts and the other end connected to the other of the pair of hanging bolts; A reinforcing metal fitting disposed so as to cross between the pair of suspension bolts at a height position where the brace bolt is not connected; Equipped with The brace bolt has one end connected to the upper part of the one suspension bolt and the other end connected to the lower part of the other suspension bolt, the reinforcing metal fitting is disposed so as to cross between the pair of hanging bolts at a height position substantially at the center of the hanging bolts, A reinforcing structure characterized in that the intersections of the reinforcing metal fittings and each of the pair of hanging bolts are fastened together.

3. The reinforcing metal fitting is A flat plate member disposed across the pair of hanging bolts and in contact with each outer peripheral surface of the pair of hanging bolts; A plurality of fixing members attached to the flat plate member; Equipped with The reinforcing structure according to claim 2 , wherein the plurality of fixing members fix the pair of hanging bolts by sandwiching them between the flat plate member and the plurality of fixing members.

4. The reinforcing metal fitting is A flat plate member disposed across the pair of hanging bolts and in contact with each outer peripheral surface of the pair of hanging bolts; A plurality of fixing members attached to the flat plate member; Equipped with The reinforcing structure according to claim 1 , wherein the plurality of fixing members fix the pair of suspension bolts and the brace bolt by sandwiching them between the flat plate member and the plurality of fixing members.

5. The flat plate member has a rail portion provided in a direction crossing the pair of hanging bolts, The reinforcement structure described in claim 3 or 4, characterized in that the fixing member has a fastening member that engages with the rail portion, is movable along the rail portion when the fastening member is in a temporarily fixed state, and is fixed in a state in which it cannot move along the rail portion when the fastening member is tightened.

6. A brace bolt that connects one suspension bolt to the other suspension bolt is disposed diagonally between a pair of suspension bolts disposed at a predetermined interval, and a ceiling-suspended object is connected to the lower ends of the pair of suspension bolts to support the ceiling-suspended object in a suspended state in a ceiling space. A reinforcing metal fitting is disposed so as to cross between the pair of suspension bolts at a height position where the brace bolt is not connected, A reinforcing bracket characterized in that the intersections of the reinforcing bracket and each of the pair of hanging bolts are fastened, and the intersections of the reinforcing bracket and the brace bolt are further fastened, thereby reinforcing the hanging bolts.

7. A flat plate member disposed across the pair of hanging bolts and in contact with each outer peripheral surface of the pair of hanging bolts; A plurality of fixing members attached to the flat plate member; Equipped with The reinforcing metal fitting according to claim 6, wherein the plurality of fixing members fix the pair of suspension bolts and the brace bolt by sandwiching them between the flat plate member and the plurality of fixing members.

8. The flat plate member has a rail portion provided in a direction crossing the pair of hanging bolts, The reinforcing bracket described in claim 7, characterized in that the fixing member has a fastening member that engages with the rail portion, is movable along the rail portion when the fastening member is in a temporarily fixed state, and is fixed in a state in which it cannot move along the rail portion when the fastening member is tightened.

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