Support device

Abstract

To improve earthquake resistance compared to conventional models while allowing the position adjustment of a ceiling-suspended object.SOLUTION: A support device 1 that supports a ceiling-suspended object in a suspended state from a ceiling structure includes a plurality of suspension members 2 that hang down from the ceiling structure, a plurality of reinforcing members 3 that interconnect and reinforce the plurality of suspension members 2, a first support arm 4a that is attached to each of the plurality of suspension members 2, is attached to a position near the upper ends of the plurality of suspension members 2 and extends in the horizontal direction, a second support arm 4b that is attached to a position near the lower ends of the plurality of suspension members 2 and extends in the horizontal direction, and a plurality of support members 5 that are attached to the first support arm 4a and the second support arm 4b in a state parallel to the suspension members 2 and support the ceiling-suspended object at the lower end that hangs down from the second support arm 4b. The first support arm 4a and the second support arm 4b are rotatable with respect to the suspension members 2, and the distance between the support member 5 and the suspension member 2 is adjustable.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a support device that supports a ceiling-suspended object, such as an air conditioner, while suspending it from a ceiling structure. [Background technology]

[0002] Conventionally, as a support device for supporting a ceiling-suspended object such as an air conditioner while hanging it from a ceiling structure, for example, a support frame body in which a plurality of frame members are assembled in a rectangular shape is attached to the lower ends of a plurality of hanging members hanging from the ceiling structure, and a connecting bolt is hung from the support frame body to support the ceiling-suspended object (for example, Patent Document 1). In this conventional support device, slits are formed in the plurality of frame members constituting the support frame body. The connecting bolt is attached to the support frame body while being inserted into the slit. Therefore, the connecting bolt can move along the slit of the frame member, and the mounting position relative to the frame member can be adjusted. Therefore, after the hanging member is fixed to the ceiling structure, the installation position of the ceiling-suspended object in the horizontal plane can be adjusted by moving the connecting bolt in the longitudinal direction of the frame member.

[0003] Also, a ceiling-hanging fixture that allows the position of the support bolt relative to the hanging bolts to be adjusted by attaching a ceiling-hanging position adjustment metal fitting between the hanging bolts hanging down from a ceiling structure and the support bolts supporting the air conditioner is known (for example, Patent Document 2). The ceiling-hanging position adjustment metal fitting in this ceiling-hanging fixture is composed of a flat metal fitting having a fixing hole for fixing the support bolt and an elongated hole for fixing the hanging bolt. By adjusting the fixing position of the hanging bolt relative to the elongated hole, the relative position of the hanging bolt and the support bolt changes, so that the ceiling-hanging position of the air conditioner can be adjusted. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2020-12344 A [Patent Document 2] JP 2018-146204 A Summary of the Invention [Problem to be solved by the invention]

[0005] The support device of the above-mentioned Patent Document 1 requires a support frame body, which is made of a plurality of frame members assembled in a rectangular shape, to be attached to the lower end of the hanging member. The frame member has a slit formed by inserting a spacer between two shaped steels. The support frame body is made by assembling such a plurality of frame members in a rectangular shape. Therefore, the conventional support device has a problem that the number of parts is large and the manufacturing cost is high.

[0006] In addition, the support device of Patent Document 1 moves the connecting bolts that support the ceiling-suspended object in a linear direction along the slits of the frame member, so that the ceiling-suspended object can be moved in two mutually perpendicular directions in a horizontal plane. However, the conventional support device has a problem in that it is not possible to adjust the position of the ceiling-suspended object while changing its posture in a rotational direction in a horizontal plane using only the position adjustment function of the support frame.

[0007] On the other hand, the ceiling-hanging fixture of Patent Document 2 makes it possible to adjust the hanging position by providing a flat ceiling-hanging position adjustment fitting between the hanging bolt and the support bolt, and can be realized at low cost with a small number of parts. In addition, the ceiling-hanging position adjustment fitting of Patent Document 2 has the advantage that the hanging position can be adjusted in the rotational direction because the hanging bolt or the support bolt can be rotated around the center.

[0008] However, the ceiling-mounted installation device in Patent Document 2 has the problem that the entire weight of the air conditioner is placed on the ceiling-mounted position adjustment bracket, so that when a large acceleration is applied during an earthquake, the ceiling-mounted position adjustment bracket becomes displaced significantly, causing the air conditioner to vibrate significantly.

[0009] Fig. 8 is a side view of the ceiling-hanging fixture of Patent Document 2. As shown in Fig. 8(a), the ceiling-hanging fixture includes a ceiling-hanging position adjustment fitting 220 between a hanging bolt 210 and a support bolt 230. The hanging bolt 210 hangs down from a ceiling structure. The support bolt 230 has its lower end fixed to a mounting piece 110 of the air conditioner 100, and supports the air conditioner 100.

[0010] FIG. 8(b) shows the behavior of the ceiling-hanging fixture when an earthquake occurs. As described above, the entire load of the air conditioner 100 is applied to the ceiling-hanging position adjustment fitting 220. Here, if the weight of the air conditioner 100 is m and the acceleration when an earthquake occurs is a, the force F acting on the ceiling-hanging position adjustment fitting 220 when an earthquake occurs is F=ma. For example, when the acceleration a increases when a large-scale earthquake occurs, the force F acting on the ceiling-hanging position adjustment fitting 220 also increases accordingly. When the force F acting on the ceiling-hanging position adjustment fitting 220 increases when an earthquake occurs, the ceiling-hanging position adjustment fitting 220 vibrates greatly in the direction of arrow A1 from the viewpoint 221 at the position fixed to the hanging bolt 210 as shown in FIG. 8(b). In addition, a large force also acts on the support bolt 230, so the support bolt 230 vibrates greatly in the direction of arrow A2 from the viewpoint 231 at the position fixed to the ceiling-hanging position adjustment fitting 220 as shown in FIG. 8(b). As a result, the air conditioner 100 vibrates due to a combination of the vibration of the ceiling suspension position adjustment bracket 220 in the direction of arrow A1 and the vibration of the support bolt 230 in the direction of arrow A2, and the amplitude of the vibration of the air conditioner 100 in the direction of arrow A3 increases.

[0011] The present invention has been made to solve the above problems, and has an object to provide a support device that allows adjustment of the position of an object suspended from the ceiling while having improved earthquake resistance compared to conventional devices. [Means for solving the problem]

[0012] In order to achieve the above-mentioned object, firstly, the present invention provides a support device for supporting a ceiling-suspended object in a suspended state from a ceiling structure, comprising: a plurality of hanging members hanging from the ceiling structure; a plurality of reinforcing members connecting and reinforcing the plurality of hanging members; a first support arm attached to a position near the upper end of each of the plurality of hanging members and extending laterally from the hanging members; a second support arm attached to a position near the lower end of each of the plurality of hanging members and extending laterally from the hanging members; and a plurality of support members attached to the first support arm and the second support arm in a state parallel to the hanging members and supporting the ceiling-suspended object at their lower ends hanging from the second support arm, wherein the first support arm and the second support arm are rotatable relative to the hanging members, and the distance between the support members and the hanging members is adjustable.

[0013] Secondly, the present invention is characterized in that, in a support device having the first configuration, the multiple hanging members are arranged at vertices of a rectangle in a planar view, and the first support arm and the second support arm are attached facing outward from the rectangle.

[0014] Thirdly, the present invention is characterized in that in a support device having the first or second configuration, the multiple first support arms and the multiple second support arms attached to the multiple hanging members are attached in a parallel state to each other in a planar view.

[0015] Fourth, the present invention is characterized in that, in a support device having the first configuration, the multiple hanging members are arranged at vertices of a rectangle in a planar view, and the first support arm and the second support arm are attached facing inward of the rectangle. Effect of the Invention

[0016] According to the present invention, it is possible to provide a support device that allows adjustment of the position of an object suspended from the ceiling and has improved earthquake resistance compared to conventional support devices. [Brief description of the drawings]

[0017] [Figure 1] FIG. 2 is a perspective view showing a configuration example of a support device. [Diagram 2] 10A to 10C are diagrams illustrating examples of how the support arm and the support member are attached to the hanging member. [Diagram 3] FIG. 2 is a plan view of the support device when viewed from above, the support device supporting the air conditioner. [Figure 4] FIG. 13 is a diagram showing an example in which a plurality of support arms are installed in parallel with each other. [Diagram 5] FIG. 2 is a perspective view showing a state in which the support arm is attached facing inwardly of the support device. [Figure 6] FIG. 13 is a plan view showing the state in which the support arm is attached facing inwardly of the support device. [Figure 7] FIG. 13 is a diagram showing a support device that holds the air conditioner in a lifted state. [Figure 8] FIG. 1 is a diagram showing a conventional ceiling-mounted fixture. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] 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.

[0019] Fig. 1 is a perspective view showing an example of the configuration of a support device 1 according to an embodiment of the present invention. The support device 1 is a device that supports various ceiling-suspended objects such as air conditioners, lighting fixtures, ducts, and various pipes while hanging them from a ceiling structure. In this embodiment, a ceiling-mounted air conditioner 100 is shown as an example of a ceiling-suspended object. The XYZ three-dimensional coordinate system shown in Fig. 1 is a coordinate system in which the XY plane is the horizontal plane and the Z direction is the vertical direction.

[0020] As shown in Figure 1, the support device 1 comprises a plurality of hanging members 2 hanging from a ceiling structure, a plurality of reinforcing members 3 connecting the plurality of hanging members 2 to each other to reinforce them, a plurality of support arms 4 attached to each of the plurality of hanging members 2 and extending laterally (horizontally) from the hanging members, and a support member 5 hanging from the support arms 4 in a state parallel to the hanging members 2.

[0021] The hanging member 2 is, for example, a hanging bolt. The hanging bolt is a bolt member having a male screw formed on its outer peripheral surface over the entire length. The upper end of the hanging member 2 is attached to a ceiling structure such as a deck plate provided on the underside of the upper floor floor slab. An insert, an anchor, etc. is installed on the deck plate, and a female screw hole is opened on the underside. The hanging member 2 is installed in a state of hanging from the ceiling structure by fitting the male screw part at the upper end into the female screw hole. When supporting the air conditioner 100 in a state of being suspended in the ceiling space, four hanging members 2 are attached to the ceiling structure as shown in FIG. 1. These four hanging members 2 are installed at the positions of the four vertices that form a rectangle in a plan view.

[0022] The reinforcing member 3 is formed of, for example, a brace bolt. A brace bolt is a bolt member similar to a hanging bolt. The reinforcing member 3 is attached to the four sides connecting the vertices of the rectangle in plan view to which the hanging members 2 are attached. A connecting member 6 for connecting the reinforcing members 3 is attached to a position near the upper end and a position near the lower end of each hanging member 2. The connecting member 6 has a pair of connecting portions that extend from the hanging member 2 to which it is attached toward each of the two adjacent hanging members 2, 2. The connecting member 6 is capable of fixing the reinforcing member 3 to each of the pair of connecting portions.

[0023] Both ends of the reinforcing member 3 are fixed to connecting members 6 attached to a pair of adjacent hanging members 2, 2, connecting the pair of hanging members 2, 2 to each other. That is, one end of the reinforcing member 3 is fixed to a connecting member 6 attached to a position near the upper end of one of the pair of adjacent hanging members 2, 2. The other end of the reinforcing member 3 is fixed to a connecting member 6 attached to a position near the lower end of the other hanging member 2. The two reinforcing members 3, 3 are arranged between the pair of adjacent hanging members 2, 2 so that they cross each other. A cross-connecting metal fitting 7 is attached to the intersection, and the central parts of the two reinforcing members 3, 3 are connected integrally.

[0024] For example, as shown in Figure 1, a total of eight reinforcing members 3 are attached to positions corresponding to the four sides connecting the vertices of a rectangle in plan view in which four hanging members 2 are arranged. In this way, the four hanging members 2 are integrally joined by the reinforcing members 3 and reinforced as a highly rigid structure.

[0025] The support arm 4 is attached to each of the multiple hanging members 2. In the example of FIG. 1, four hanging members 2 hang down from the ceiling structure. Therefore, the support arm 4 is attached to each of the four hanging members 2. The support arm 4 in this embodiment includes a first support arm 4a attached to a position near the upper end of the hanging member 2 and a second support arm 4b attached to a position near the lower end of the hanging member 2. The first support arm 4a and the second support arm 4b are attached so as to extend laterally from the hanging member 2. A connecting member 6 is disposed near the upper end of the hanging member 2 to which the first support arm 4a is attached, and two reinforcing members 3, 3 are connected to the connecting member 4a. Therefore, the position near the upper end of the hanging member 2 to which the first support arm 4a is attached is a position with high rigidity. In addition, a connecting member 6 is disposed near the lower end of the hanging member 2 to which the second support arm 4b is attached, and two reinforcing members 3, 3 are connected to the connecting member 6. Therefore, the position near the lower end of the hanging member 2 to which the second support arm 4b is attached also has high rigidity.

[0026] The support member 5 is formed of, for example, a bolt member similar to a hanging bolt. The support member 5 is supported by the first support arm 4a and the second support arm 4b, and is installed in a state parallel to the hanging member 2. The support member 5 hangs further downward from the second support arm 4b. The lower end of the support member 5 extends further downward than the lower end of the hanging member 2. In other words, the support member 5 hangs down toward the mounting piece 110 provided on the side of the air conditioner 100, and its lower end supports the lower side of the mounting piece 110, thereby supporting the air conditioner 100 in a suspended state.

[0027] 2 is a diagram illustrating an example of how the support arm 4 and the support member 5 are attached to the hanging member 2. As shown in Fig. 2(a), the first support arm 4a is attached to a position near the upper end of the hanging member 2 and supports a position near the upper end of the support member 5. The second support arm 4b is attached to a position near the lower end of the hanging member 2 and supports the center of the support member 5.

[0028] As shown in FIG. 2(b), the first support arm 4a is formed of an L-shaped angle material having a vertical plate portion 11 and a horizontal plate portion 12. The vertical plate portion 11 reinforces the horizontal plate portion 12. Therefore, even if the load of the air conditioner 100 is applied to the horizontal plate portion 12 of the first support arm 4a, the first support arm 4a will not deform. The horizontal plate portion 12 has an insertion hole 14 for inserting the hanging member 2 and an elongated hole 13 for inserting the support member 5. The inner diameter of the insertion hole 14 is slightly larger than the diameter of the hanging member 2. The width of the elongated hole 13 is larger than the diameter of the support member 5. The insertion hole 14 is formed in the longitudinal direction of the elongated hole 13.

[0029] The first support arm 4a is attached to the hanging member 2 at a predetermined height by inserting the hanging member 2 into an insertion hole 14 formed in the horizontal plate portion 12 and fastening two nuts 15, 15 with the horizontal plate portion 12 in between. When at least one of the two nuts 15, 15 is loosened, the first support arm 4a is rotatable in the R direction around the hanging member 2 as shown in Fig. 2(a). In contrast, when the two nuts 15, 15 are tightened, the first support arm 4a is fixed in a state in which it does not rotate in the R direction relative to the hanging member 2.

[0030] As shown in Fig. 2(b), the support member 5 is inserted into a long hole 13 formed in the horizontal plate portion 12 of the first support arm 4a, and two nuts 16, 16 are fastened across the horizontal plate portion 12, thereby being supported by the first support arm 4a. When at least one of the two nuts 16, 16 is loosened, the support member 5 is movable along the longitudinal direction (direction F) of the long hole 13, as shown in Fig. 2(a). On the other hand, when the two nuts 16, 16 are fastened, the support member 5 is fixed at a predetermined position in the long hole 13 of the first support arm 4a.

[0031] As shown in FIG. 2(c), the second support arm 4b is made of a flat metal material. However, the second support arm 4b may be made of an angle material similar to that of the first support arm 4a. The second support arm 4b has an insertion hole 18 for inserting the hanging member 2 and an elongated hole 17 for inserting the support member 5. The inner diameter of the insertion hole 18 is slightly larger than the diameter of the hanging member 2. The width of the elongated hole 17 is larger than the diameter of the support member 5. The insertion hole 18 is formed in the longitudinal direction of the elongated hole 17.

[0032] The second support arm 4b is attached to the hanging member 2 at a predetermined height by inserting the hanging member 2 into the insertion hole 18 and fastening two nuts 19, 19 above and below. When at least one of the two nuts 19, 19 is loosened, the second support arm 4b is rotatable in the R direction around the hanging member 2 as shown in Fig. 2(a). In contrast, when the two nuts 19, 19 are tightened, the second support arm 4b is fixed in a state in which it cannot rotate in the R direction relative to the hanging member 2.

[0033] As shown in FIG. 2(c), the support member 5 is inserted into a long hole 17 formed in the second support arm 4b, and two nuts 20, 20 are fastened across the second support arm 4b, thereby supporting the support member 5 on the second support arm 4b. When at least one of the two nuts 20, 20 is loosened, the support member 5 is movable along the longitudinal direction (direction F) of the long hole 17, as shown in FIG. 2(a). On the other hand, when the two nuts 20, 20 are fastened, the support member 5 is fixed at a predetermined position in the long hole 17 of the second support arm 4b. Therefore, the support member 5 is supported at two points, upper and lower, by the first support arm 4a and the second support arm 4b.

[0034] A cylindrical vibration-isolating member 21 made of an elastic member such as rubber is attached to the lower end of the support member 5. A nut 22 is attached to the underside of the vibration-isolating member 21, so that the vibration-isolating member 21 will not come off the support member 5. The vibration-isolating member 21 is joined to the underside of the mounting piece 110 of the air conditioner 100, and supports the air conditioner 100. In other words, the support device 1 supports the air conditioner 100 via the vibration-isolating member 21. Therefore, the support device 1 can suppress the transmission of vibrations generated during operation of the air conditioner 100 to the upper floor floor slab, etc.

[0035] The support device 1 configured as described above can rotate the support arm 4 relative to the hanging member 2 by loosening the two nuts 15, 15 that fix the first support arm 4a to the hanging member 2 and loosening the two nuts 19, 19 that fix the second support arm 4b to the hanging member 2. Therefore, by rotating the support arm 4, the support device 1 can adjust the position of the support member 5 that supports the air conditioner 100.

[0036] In addition, the support device 1 can move the position of the support member 5 relative to the hanging member 2 in both the approaching direction and the moving away direction by loosening the two nuts 16, 16 that fix the upper part of the support member 5 to the first support arm 4a and the two nuts 20, 20 that fix the center part of the support member 5 to the second support arm 4b. This changes the distance between the support member 5 and the hanging member 2. Therefore, the support device 1 can adjust the position of the support member 5 that supports the air conditioner 100 by moving the support member 5 along the longitudinal direction of the support arm 4. Therefore, the support device 1 of this embodiment can change the posture of the air conditioner 100 in the rotational direction when adjusting the position of the air conditioner 100, and the degree of freedom for position adjustment is higher than conventionally.

[0037] Fig. 3 is a plan view of the support device 1 viewed from above while supporting the air conditioner 100. Fig. 3 shows an example in which the support arms 4 are installed facing outward from the support device 1. In this case, each support arm 4 is rotatable in the direction shown by the two-dot chain line in the figure, and the position of the support member 5 can be adjusted within that movable range. Therefore, the support device 1 has the advantage that the position of each mounting piece 110 of the air conditioner 100 can be installed within the area shown by the two-dot chain line in Fig. 3, and the installation position and posture of the air conditioner 100 in the horizontal plane can be easily adjusted.

[0038] For example, when the support device 1 supports the air conditioner 100 and the position of the air conditioner 100 is adjusted by operating the air conditioner 100, the four support arms 4 rotate in conjunction with the adjustment operation. The four support members 5 also move along the long holes 13, 17 of the support arms 4 in conjunction with the adjustment operation. In other words, since the four support members 5 are in a state in which they support the air conditioner 100 at their lower ends, they are displaced in conjunction with the position adjustment operation of the air conditioner 100. At this time, the relative positional relationship of the four support members 5 is unchanged. In other words, when the support device 1 supports the air conditioner 100, there is a constraint that the relative positional relationship of the four support members 5 is unchanged, and therefore there is a limit to the range in which the position of the air conditioner 100 can be adjusted.

[0039] In order to make the position adjustable range of the air conditioner 100 as wide as possible, the inventors of the present invention have conducted extensive research and found that it is preferable to install the four support arms 4 in a parallel state in a horizontal plane. FIG. 4 is a diagram showing an example in which a plurality of support arms 4 are installed in a parallel state. As shown in FIG. 4, by installing a plurality of support arms 4 in a parallel state in a horizontal plane, it is possible to expand the position adjustable range of the air conditioner 100 more than the example shown in FIG. 3. Therefore, when the support device 1 supports the air conditioner 100 and is in a state before position adjustment, it is preferable that the four support arms 4 are parallel to each other in a horizontal plane as shown in FIG. 4.

[0040] In addition, in the above-described supporting device 1, an example has been described in which the supporting arm 4 is disposed facing outward from the rectangular area in plan view formed by the four hanging members 2 and the multiple reinforcing members 3. However, this is not limited to this, and the supporting arm 4 may be attached to the hanging member 2 facing inward from the rectangular area in plan view.

[0041] FIG. 5 is a perspective view showing a state in which the support arm 4 is attached to the support device 1 facing inward. FIG. 6 is a plan view showing a state in which the support arm 4 is attached to the support device 1 facing inward. As shown in FIG. 5 and FIG. 6, even when the support arm 4 faces inward, the support device 1 can support the air conditioner 100 in a state in which it is suspended inside the rectangular area formed by the four hanging members 2. In this case, the range in which the support arm 4 can rotate around the hanging members 2 is smaller than that of the example of FIG. 3 or FIG. 4 described above. However, the support device 1 in this case also allows the air conditioner 100 to change its posture in the rotation direction when adjusting the position of the air conditioner 100, and the degree of freedom for position adjustment is still higher than in the past.

[0042] Moreover, by orienting the support arm 4 toward the inside of the support device 1, the entire air conditioner 100 can be accommodated inside a rectangular area in a plan view, as shown in FIG. 6. Therefore, as shown in FIG. 7, after adjusting the position of the air conditioner 100, the support device 1 can hold the air conditioner 100 in a lifted state inside the rectangular area. For example, the air conditioner 100 shown in FIG. 7 is installed so that the decorative panel attached to its underside is at approximately the same height as the ceiling panel. When the work of installing the ceiling panel is performed in the ceiling space in which the air conditioner 100 is supported, the air conditioner 100 gets in the way and interferes with the installation work of the ceiling panel. In such a case, since the support device 1 can hold the air conditioner 100 in a lifted state from a predetermined installation height position, when the work of installing the ceiling panel is performed, it can be held at a height position that does not interfere with the work. Therefore, when the air conditioner 100 is supported with the support arm 4 facing the inside of the support device 1, the work of installing the ceiling panel can be performed efficiently.

[0043] In particular, the above-described supporting device 1 does not require a supporting frame as in the conventional case. Therefore, the number of parts can be reduced compared to the conventional case. In addition, the supporting arm 4 and supporting member 5 provided in the supporting device 1 of this embodiment are members with a simple structure, and therefore the unit price of the parts is low. Therefore, the supporting device 1 of this embodiment has the advantage that it can be manufactured more cheaply than the conventional supporting devices.

[0044] Moreover, the support device 1 described above supports the load of the air conditioner 100 by distributing it between the first support arm 4a and the second support arm 4b. Therefore, the force F acting on the air conditioner 100 during an earthquake can be distributed between the first support arm 4a and the second support arm 4b, and it is possible to prevent a large force from acting only on the second support arm 4b. In addition, since the support member 5 is fixed to the first support arm 4a at a position near the upper end and fixed to the second support arm 4b at a central portion, even if the second support arm 4b tries to vibrate, the support member 5 between the first support arm 4a and the second support arm 4b functions as a tension rod, so that the vibration of the second support arm 4b can be suppressed. Therefore, the support device 1 of this embodiment is capable of suppressing the vibration amplitude of the air conditioner 100 during an earthquake and has excellent earthquake resistance.

[0045] Although one embodiment of the present invention has been described above, the present invention is not limited to the above embodiment. In other words, the present invention can be applied to various modified examples other than the configuration described in the above embodiment.

[0046] For example, in the above embodiment, the air conditioner 100 is given as an example of a ceiling-suspended object. However, the ceiling-suspended object to which the present invention can be applied is not limited to the air conditioner 100.

[0047] For example, the support device 1 in the above embodiment has been described as including the support arm 4 with two arm members, the first support arm 4a and the second support arm 4b. However, the support arm 4 may include a third support arm in addition to the first support arm 4a and the second support arm 4b. [Explanation of symbols]

[0048] 1...support device, 2...hanging member, 3...reinforcing member, 4...support arm, 4a...first support arm, 4b...second support arm, 5...support member, 100...air conditioner (ceiling-suspended object).

Claims

1. A support device for supporting a ceiling-suspended object in a suspended state from a ceiling structure, A plurality of hanging members hanging down from the ceiling structure; a plurality of reinforcing members that connect the plurality of hanging members to each other to reinforce the hanging members; a first support arm attached to each of the plurality of hanging members at a position adjacent to an upper end thereof and extending laterally from the hanging member; a second support arm attached to each of the plurality of hanging members at a position adjacent to a lower end thereof and extending laterally from the hanging member; a plurality of support members attached to the first support arm and the second support arm in a state parallel to the hanging member, the support members having lower ends hanging down from the second support arm to support the ceiling-suspended object; Equipped with A support device, characterized in that the first support arm and the second support arm are rotatable relative to the hanging member, and the distance between the support member and the hanging member is adjustable.

2. The plurality of hanging members are arranged at vertices of a rectangle in a plan view, 2. The support apparatus of claim 1, wherein the first support arm and the second support arm are attached facing outwardly of the rectangle.

3. 3 . The support device according to claim 1 , wherein the first support arms and the second support arms attached to the hanging members are attached in a state parallel to each other in a plan view. 4 .

4. The plurality of hanging members are arranged at vertices of a rectangle in a plan view, 2. The support apparatus of claim 1, wherein the first support arm and the second support arm are attached facing inwardly of the rectangle.

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