Vibration control structure of ceiling mounted device

Abstract

To provide a vibration control structure of a ceiling mounted device which enables a user to confirm that the ceiling mounted device is installed so as to achieve vibration control performance with high workability.SOLUTION: A vibration control structure 1 of a ceiling mounted device is a structure which is installed on a ceiling surface part through a hanging bolt T hung from the ceiling surface part and includes: a ceiling mounted bracket 2 having an attachment part 21 having a first bolt insertion hole 2a into which the hanging bolt is inserted, and a plate-like fixed piece 22 which is provided bent at an end of the attachment part and fixed to a side surface of the ceiling mounted device; an elastic component 3 which is formed so as to be able to contract and is located at a lower side Y2 relative to the attachment part with the hanging bolt inserted therethrough; a lower screw component 11 which supports a lower end of the elastic component by the hanging bolt being screwed thereinto; and a contraction amount check gauge 81 having a window part 80 for checking a contraction state of the elastic component.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a vibration isolation structure for a ceiling-suspended device. [Background technology]

[0002] BACKGROUND ART Conventionally, ceiling-suspended equipment such as air conditioners is generally supported in a vibration-isolating manner by being suspended from a concrete slab that constitutes the ceiling surface via suspension bolts.

[0003] An example of a vibration isolation device that provides vibration-isolating support for an air conditioner as such ceiling-suspended equipment is disclosed in Patent Document 1. The vibration isolation device disclosed in Patent Document 1 includes a hanging hardware that connects the air conditioner to a hanging bolt hanging from a concrete slab, a compression part that is provided below the hanging hardware and supports the hanging hardware in a compressed (contracted) state, an upper nut that is threaded onto the hanging bolt to restrict upward movement of the hanging hardware, and a lower nut that is threaded onto the hanging bolt to support the lower end of the compression part. The compression part includes a coil spring configured with a winding diameter that allows the hanging bolt to be inserted therethrough, and a pair of rubber bushings that are fitted into the upper and lower ends of the coil spring. When an external force such as vibration acts on the coil spring, the coil spring is compressed, thereby absorbing vibrations transmitted from the hanging bolt to the air conditioner. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2008-20170 Summary of the Invention [Problem to be solved by the invention]

[0005] The conventional vibration isolation device disclosed in Patent Document 1 requires that the coil spring be compressed to absorb the vibrations transmitted from the suspension bolts to the air conditioner. To do this, the air conditioner needs to be installed so that the load on the coil spring is within an appropriate range, but it can be difficult to confirm whether the load on the coil spring is within the appropriate range when the air conditioner (ceiling-suspended equipment) is installed.

[0006] An object of the present invention is to provide a vibration-proof structure for a ceiling-suspended device that allows easy confirmation that the ceiling-suspended device is installed so as to exhibit vibration-proofing properties. [Means for solving the problem]

[0007] The above object can be achieved by the present invention described below. In other words, the present invention is a vibration-proof structure for ceiling-suspended equipment that is installed on a ceiling surface via a hanging bolt hanging from the ceiling surface, and is characterized by comprising: a ceiling-suspended fitting having an attachment portion having a first bolt insertion hole for inserting the hanging bolt, and a plate-shaped fixing piece that is bent at the end of the attachment portion and fixed to the side of the ceiling-suspended equipment; an elastic part that is configured to be contractible and is positioned below the attachment portion so that the hanging bolt is inserted therethrough; a lower screw-on part that is screwed onto the hanging bolt and supports the lower end of the elastic part; and a contraction amount confirmation gauge having a window portion for checking the contraction state of the elastic part. [Effects of the Invention]

[0008] According to the present invention, it is possible to efficiently check whether a ceiling-suspended device is installed so as to exhibit vibration isolation. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a side view showing a state in which a vibration-proof structure for a ceiling-suspended device according to one embodiment of the present invention is applied and the ceiling-suspended device is supported by a suspension bolt. [Figure 2]FIG. 2 is a perspective view showing a vibration-proof structure of the ceiling-suspended device. [Figure 3] FIG. 2 is an exploded perspective view showing the vibration isolation structure of the ceiling-suspended device. [Figure 4] 3 is a side view showing, in partial cross section, a coil spring assembly including a compression coil spring that constitutes the vibration-proof structure of the ceiling-suspended equipment. FIG. [Figure 5] 10A and 10B are diagrams showing gauge components including a contraction amount confirmation gauge that constitutes the vibration-proof structure of the ceiling-hanging equipment, where (A) is a front view, (B) is a plan view, and (C) is a cross-sectional view along line II of (A). [Figure 6] 10A and 10B are side views showing an example of a state in which the vibration-proof structure of the ceiling-suspended equipment is applied and the ceiling-suspended equipment is supported by the suspension bolts, where (A) is a diagram showing a state in which the identification ring is positioned at the lower end position of the window portion, (B) is a diagram showing a state in which the identification ring is positioned at the upper end position of the window portion, and (C) is a diagram showing a state in which the identification ring is positioned in a position away from the window portion. [Figure 7] 10 is a side view showing a modified example of the vibration-proof structure of the ceiling-suspended device, showing the state in which the ceiling-suspended device is supported by the suspension bolts. FIG. [Figure 8] 10 is a plan view showing a gauge component including a contraction amount confirmation gauge that constitutes a modified example of the vibration-proof structure of the ceiling-suspended equipment. FIG. [Figure 9] FIG. 10 is a perspective view showing another modified example of the vibration isolation structure of the ceiling-suspended equipment. [Figure 10] FIG. 10 is an exploded perspective view showing another modified example of the vibration isolation structure of the ceiling-suspended equipment. DETAILED DESCRIPTION OF THE INVENTION

[0010] (One embodiment) Hereinafter, a vibration-proof structure 1 (vibration-proof structure for ceiling-suspended equipment) according to one embodiment of the present invention will be described with reference to FIGS. 1 to 6. FIG. 1 is a side view showing a state in which a vibration-proof structure 1 according to one embodiment of the present invention is applied and an air conditioner K (ceiling-suspended equipment) is supported by a suspension bolt T. FIG. 2 is a perspective view showing the vibration-proof structure 1. FIG. 3 is an exploded perspective view showing the vibration-proof structure 1. FIG. 4 is a side view showing, partially in cross section, a coil spring assembly 10 including a compression coil spring 3 that constitutes the vibration-proof structure 1. FIG. 5 is a diagram showing a gauge component 8 including a contraction amount confirmation gauge 81 that constitutes the vibration-proof structure 1, where (A) is a front view, (B) is a plan view, and (C) is a cross-sectional view taken along line II in (A). FIG. 6 is a side view showing an example of a state in which the vibration-proof structure 1 is applied and an air conditioner K (ceiling-suspended equipment) is supported by a suspension bolt T.

[0011] As shown in FIGS. 1 to 3, the vibration-proof structure 1 is a structure for supporting an air conditioner K, which serves as a ceiling-suspended device, on a ceiling surface (not shown) via a suspension bolt T in a vibration-proof manner. The air conditioner K is suspended from the suspension bolt T via the vibration-proof structure 1 (vibration-proof structure for ceiling-suspended devices). The suspension bolt T is attached to a concrete slab that constitutes the ceiling surface. In this embodiment, arrows X, Y, and Z are perpendicular to one another. Arrow Y is the axial direction of the suspension bolt T. Arrows X and Z are directions (radial direction) perpendicular to the axis of the suspension bolt T and are the planar direction (horizontal direction) in which the ceiling surface extends. Hereinafter, arrow Y may be referred to as the "up-down direction," arrow X as the "front-rear direction," and arrow Z as the "left-right direction."

[0012] As shown in Figures 1 and 2, the vibration-proof structure 1 comprises a ceiling hanging bracket 2 that connects a hanging bolt T and an air conditioner K, a coil spring assembly 10 that has a compression coil spring 3 (elastic part) and through which the hanging bolt T is inserted, a rubber identification ring 4 (marker) that is fitted onto the coil spring assembly 10, a gauge part 8 that has a contraction amount confirmation gauge 81, a lower threaded part 11 that is threaded onto the hanging bolt T and supports the lower end of the coil spring assembly 10, and an upper threaded part 12 that is threaded onto the hanging bolt T and restricts movement of the ceiling hanging bracket 2 upward Y1.

[0013] In the following, as shown in Figures 1 and 2, the state in which the identification ring 4 is inserted onto the coil spring assembly 10, the upper threaded part 12 is threaded onto the hanging bolt T, the ceiling hanging bracket 2, the gauge part 8, and the coil spring assembly 10 are inserted in sequence, the lower threaded part 11 is threaded, and the lower threaded part 11 supports the lower end of the coil spring assembly 10 at a predetermined position on the hanging bolt T will sometimes be referred to as the "assembled state of the vibration-proof structure 1."

[0014] 2 and 3, the ceiling suspension bracket 2 is made by punching and bending a single sheet of metal. This ceiling suspension bracket 2 is made up of a rectangular suspension bracket main body 21 (mounting portion) extending in the horizontal direction XZ, a fixed piece 22 that bends at an end on one side in the front-to-rear direction X of the suspension bracket main body 21 (the air conditioner K side, rear X1 in FIG. 1) and extends downward Y2 and is fixed to face the side surface KS (shown in FIG. 1) of the air conditioner K, a bent piece 23 that bends at the other side in the front-to-rear direction X of the suspension bracket main body 21 (the side away from the air conditioner K, front X2) and extends downward Y2, and a first bolt insertion hole 2a through which a suspension bolt T can be inserted.

[0015] 2 and 3, the curved piece 23 is provided opposite the fixed piece 22 in the front-rear direction X, and the curved piece 23 and the fixed piece 22 are provided with a distance therebetween that is greater than the outer diameter of the coil spring assembly 10, which will be described later. The provision of the curved piece 23 prevents the coil spring assembly 10, which will be described later, from falling off.

[0016] 2 and 3, the first bolt insertion hole 2a is formed by cutting out the lower end of the bent piece 23, and is provided continuously to the center of the hanging hardware main body 21. The first bolt insertion hole 2a has a width dimension (dimension in the left-right direction Z) that is approximately the same as the diameter dimension of the hanging bolt T.

[0017] As shown in Figures 3 and 4, the coil spring assembly 10 comprises a compression coil spring 3 (elastic component) obtained by winding a rod-shaped or wire-shaped material in a spiral shape at equal intervals, a rubber identification ring 4, a lower cap component 5 (intervening component) that is attached to the lower end portion of the compression coil spring 3 and onto which the identification ring 4 is inserted, an upper cap component 6 that is attached to the upper end portion of the compression coil spring 3, and a rubber bushing 7 that sandwiches the hanging bracket main body 21 and gauge component 8 of the ceiling hanging bracket 2 between the upper cap component 6 and the upper cap component 6.

[0018] As shown in Figures 3 and 4, the compression coil spring 3 has a coil diameter large enough to allow the suspension bolt T to be inserted therethrough. The compression coil spring 3 is configured to deform into a compressed state (contracted state) and absorb shocks and vibrations in the compression direction. Five types of compression coil springs 3 are provided, each with a spring constant corresponding to the load of the air conditioner K. The identification ring 4, which will be described later, is colored (blue, yellow, green, white, or magenta) according to the spring constant of the compression coil spring 3 used.

[0019] As shown in FIGS. 3 and 4, the lower cap part 5 includes a rubber lower cap body 51 capable of accommodating the lower end portion of the compression coil spring 3, and a lower annular metal fitting 52 (shown in FIG. 4) having an annular shape.

[0020] 4, the lower cap body 51 integrally comprises: an annular lower plate portion 53 through which the suspension bolt T can be inserted; a cylindrical first cylindrical portion 54 continuing upward Y1 from the outer periphery of the lower plate portion 53; a cylindrical second cylindrical portion 55 continuing downward Y2 from the outer periphery of the lower plate portion 53; and a ring receiving portion 56 provided on the first cylindrical portion 54 to support the identification ring 4. The lower cap body 51 has the lower plate portion 53, the first cylindrical portion 54, the second cylindrical portion 55, and the ring receiving portion 56 colored a color (for example, black) different from the color of the identification ring 4 (blue, yellow, green, white, reddish purple).

[0021] As shown in FIG. 1, the outer diameters of the first cylindrical portion 54 and the second cylindrical portion 55 of the lower cap body 51 are formed to be approximately the same, and the outer diameter of the lower cap body 51 is formed to be slightly larger than the width (dimension in the front-to-rear direction X) of the shrinkage confirmation gauge 81 described later.

[0022] Also, as shown in Figure 4, in the lower cap body 51, the space surrounded by the lower plate portion 53 and the first cylindrical portion 54 (sometimes referred to as the "lower spring accommodating space 5A") is configured to be able to accommodate the lower end portion of the compression coil spring 3, and the space surrounded by the lower plate portion 53 and the second cylindrical portion 55 (sometimes referred to as the "metal fitting accommodating space 5B") is configured to be able to accommodate the lower annular metal fitting 52.

[0023] 4, the ring receiving portion 56 is configured to have a pair of protrusions 56A, 56A spaced apart in the vertical direction Y. Each protrusion 56A is provided so as to protrude from the outer circumferential surface of the first cylindrical portion 54, and is provided continuously around the entire circumference of the first cylindrical portion 54.

[0024] 3 and 4, the identification ring 4 is ring-shaped and has an axial dimension (dimension in the vertical direction Y) that allows it to be installed between a pair of protrusions 56A, 56A. The identification ring 4 is colored in a color (blue, yellow, green, white, or magenta) that corresponds to the spring constant of the compression coil spring 3 used. In other words, the identification ring 4 is colored a different color from the lower cap body 51, i.e., the lower cap part 5.

[0025] 4, the identification ring 4 is configured to have a thickness such that when positioned between the pair of protrusions 56A, 56A, the identification ring 4 protrudes in the horizontal direction XZ from each of the protrusions 56A. When placed between the pair of protrusions 56A, 56A, the identification ring 4 is able to abut against each of the protrusions 56A, and the abutment of the identification ring 4 against each of the protrusions 56A restricts movement of the identification ring 4 in the up-down direction Y.

[0026] As shown in FIGS. 3 and 4, the upper cap part 6 includes a rubber upper cap body 61 capable of accommodating the upper end portion of the compression coil spring 3, and an upper annular metal fitting 62 (shown in FIG. 4) having an annular shape.

[0027] 4, the upper cap body 61 includes an annular upper plate portion 63 through which the suspension bolt T can be inserted, and a cylindrical upper cylindrical portion 64 that extends downward Y2 from the outer periphery of the upper plate portion 63. In the upper cap body 61, a space surrounded by the upper plate portion 63 and the upper cylindrical portion 64 (sometimes referred to as the "upper spring accommodating space 6A") is configured to be able to accommodate the upper end portion of the compression coil spring 3.

[0028] 4, the upper circular metal fitting 62 is configured to be able to be accommodated in the upper spring accommodating space 6A. The upper circular metal fitting 62 is provided between the upper plate portion 63 of the upper cap body 61 and the compression coil spring 3.

[0029] As shown in Figure 3, the rubber bush 7 is configured to integrally comprise a rubber bush main body 71 provided on the upper surface of the hanging fixture main body 21 of the ceiling hanging fixture 2, and an entry portion 72 provided so as to be able to enter the first bolt insertion hole 2a provided in the ceiling hanging fixture 2 and the interior of the upper cap part 6.

[0030] The rubber bushing body 71 and the entrance portion 72 are configured in a cylindrical shape so that the suspension bolt T can be inserted therethrough. The rubber bushing body 71 is formed in a cylindrical shape with a larger diameter than the entrance portion 72. The rubber bushing body 71 is provided above the entrance portion 72, Y1.

[0031] As shown in Figures 3 and 5, the gauge component 8 comprises a rectangular plate-shaped shrinkage confirmation gauge 81 having a window portion 80, and a plate-shaped horizontal plate portion 82 that is bent at the upper end of the shrinkage confirmation gauge 81 and extends in the horizontal direction XZ, and has a second bolt insertion hole 8a through which the hanging bolt T can be inserted.

[0032] 5(A) and 5(C), the shrinkage amount confirmation gauge 81 comprises a continuous portion 83 continuing below the horizontal plate portion 82 at Y2, and a gauge portion 84 provided below the continuous portion 83 at Y2 and having a window portion 80. This shrinkage amount confirmation gauge 81 is installed in a position rotated approximately 90 degrees with respect to the fixed piece 22 of the ceiling suspension bracket 2, as shown in FIGS.

[0033] 5(A), the gauge section 84 is provided below the shrinkage confirmation gauge 81 and is configured to have a window section 80. In addition, the window section 80 is provided in the center of the gauge section 84 in the width direction, and lower end sections 84d of the gauge section 84 on both sides of the window section 80 are formed in an arc shape such that the width dimension gradually decreases toward the downward direction Y2.

[0034] The dimension of the gauge portion 84 in the vertical direction Y is formed to be approximately the same as the appropriate range of compression of the compression coil spring 3. The upper end of the gauge portion 84 is located at a position corresponding to the position of the identification ring 4 when the compression coil spring 3 is in a compressed state with the maximum load within the allowable range acting on it, and the lower end of the gauge portion 84 is located at a position corresponding to the position of the identification ring 4 when the compression coil spring 3 is in its natural state.

[0035] As shown in Fig. 5(A), the window portion 80 is provided in the center in the width direction (front-rear direction X). As shown in Fig. 5(C), the window portion 80 is configured by cutting out the lower end of the gauge portion 84 and has a vertically long, approximately rectangular opening. The upper end of this window portion 80 is located in a position (see Fig. 6(B)) corresponding to the position of the identification ring 4 when the compression coil spring 3 is in a compressed state with the maximum load within the allowable range acting on it, and the lower end of the window portion 80 is located in a position (see Fig. 6(A)) corresponding to the position of the identification ring 4 when the compression coil spring 3 is in its natural state.

[0036] By providing such a gauge section 84, the assembly worker can grasp the position of the identification ring 4 viewed through the window section 80 in the vertical direction Y of the window section 80, i.e., the contracted state of the compression coil spring 3.

[0037] 5(B) and (C), the horizontal plate portion 82 is formed in a plate shape extending in the horizontal direction XZ. A shrinkage amount confirmation gauge 81 is provided continuously on one side of the horizontal plate portion 82 in the left-right direction Z, and a second bolt insertion hole 8a (described later) is formed by cutting out an end edge 8b (shown in FIG. 5(B)) on the front X1 side of the horizontal plate portion 82.

[0038] 5(B), the other end edge 8c of the horizontal plate portion 82 in the left-right direction Z is configured to have an arc-shaped curved portion. The curvature of this curved portion is formed to be approximately equal to the curvature of the outer peripheral surface of the upper cap part 6 of the coil spring assembly 10, and is shaped so that the horizontal plate portion 82 does not protrude beyond the upper cap part 6 of the coil spring assembly 10 in the horizontal direction XZ when the vibration-proof structure 1 is in an assembled state.

[0039] The second bolt insertion hole 8a is formed by cutting out the front X1 edge 8b of the horizontal plate portion 82. The second bolt insertion hole 8a has a width dimension that is approximately the same as the diameter dimension of the suspension bolt T.

[0040] 2 and 3, the lower threaded part 11 is configured to have a pair of lower hexagonal nuts 11A, 11B. The pair of lower hexagonal nuts 11A, 11B that make up the lower threaded part 11 are each threaded onto the suspension bolt T, and are positioned below the coil spring assembly 10 at a position Y2 so as to support the lower end of the coil spring assembly 10.

[0041] 2 and 3, the upper threaded part 12 is configured to have an upper hexagonal nut 12A and a washer 12B. The upper hexagonal nut 12A and the washer 12B that make up the upper threaded part 12 are each configured to be threaded onto the hanging bolt T and positioned above Y1 the ceiling hanging bracket 2 to restrict movement of the ceiling hanging bracket 2 in the above Y1 direction.

[0042] The assembly procedure for supporting the air conditioner K on the suspension bolts T using such a vibration-isolating structure 1 will be described with reference to FIGS.

[0043] First, the fixing piece 22 of the ceiling suspension bracket 2 is brought close to the side surface KS of the air conditioner K so as to face the side surface KS, and the fixing piece 22 and the side surface KS of the air conditioner K are fixed with bolts.

[0044] Then, the coil spring assembly 10 is assembled. When assembling the coil spring assembly 10, the identification ring 4 is inserted between the pair of protrusions 56A, 56A that make up the ring receiving portion 56 in advance, and the identification ring 4 is placed between the pair of protrusions 56A, 56A.

[0045] Thereafter, the lower end portion of the compression coil spring 3 is accommodated in the lower spring accommodating space 5A of the lower cap part 5, and the lower annular metal fitting 52 is accommodated in the metal fitting accommodating space 5B of the lower cap body 51. Furthermore, the upper annular metal fitting 62 is installed in the upper spring accommodating space 6A of the upper cap part 6, and the upper end portion of the compression coil spring 3 is accommodated therein. In this manner, the coil spring assembly 10 is assembled.

[0046] After this, the upper hexagonal nut 12A constituting the upper threaded part 12 is brought close to the tip of the hanging bolt T hanging down from the ceiling surface and screwed onto it, and then the washer 12B is inserted. Then, the upper hexagonal nut 12A and the washer 12B are positioned at a predetermined position on the hanging bolt T.

[0047] Thereafter, the rubber bushing 7 is brought close to the tip of the suspension bolt T and inserted therethrough, with the rubber bushing body 71 positioned above the entry portion 72 at position Y1. With the suspension bolt T inserted into the rubber bushing 7, the rubber bushing 7 is positioned below the washer 12B of the upper threaded part 12 at position Y2.

[0048] Thereafter, the coil spring assembly 10 is brought close to the tip of the hanging bolt T and inserted, with the upper cap part 6 located above the lower cap part 5 at Y1. After this, the pair of lower hex nuts 11A, 11B that make up the lower threaded part 11 are brought close to the tip of the hanging bolt T and screwed together. As a result, the coil spring assembly 10 and the lower threaded part 11 are positioned at the tip (lower end) of the hanging bolt T and temporarily fixed to the hanging bolt T. At this time, a gap is left between the rubber bushing 7 and the coil spring assembly 10 that is large enough to allow the hanging bracket main body 21 of the ceiling hanging bracket 2 and the horizontal plate part 82 of the gauge part 8 to be inserted.

[0049] Thereafter, with the horizontal plate portion 82 of the gauge component 8 positioned above the contraction amount confirmation gauge 81 at Y1, the horizontal plate portion 82 of the gauge component 8 is brought close in the horizontal direction XZ to between the rubber bushing 7 of the suspension bolt T and the coil spring assembly 10, and the suspension bolt T is inserted into the second bolt insertion hole 8a provided in the horizontal plate portion 82 so that the opening of the second bolt insertion hole 8a approaches the suspension bolt T, and the suspension bolt T is inserted into the second bolt insertion hole 8a. The horizontal plate portion 82 of the gauge component 8 comes into contact with the upper surface of the coil spring assembly 10, and the identification ring 4 is positioned at the lower end position S1 of the window portion 80, as shown in FIG. 6(A). At this time, the load of the air conditioner K is not acting on the compression coil spring 3.

[0050] Next, with the ceiling hanging bracket 2 in a position where the hanging bracket main body 21 is positioned above the fixed piece 22 Y1, the hanging bracket main body 21 of the ceiling hanging bracket 2 is brought close in the horizontal direction XZ to between the rubber bushing 7 of the hanging bolt T and the horizontal plate portion 82 of the gauge component 8, and the hanging bolt T is inserted into the first bolt insertion hole 2a provided in the hanging bracket main body 21 so that the opening of the first bolt insertion hole 2a is close to the hanging bolt T, and the hanging bolt T is inserted into the first bolt insertion hole 2a. The hanging bolt T is positioned at the end of the first bolt insertion hole 2a farther from the opening. Then, the shrinkage confirmation gauge 81 is rotated and positioned at a position rotated approximately 90 degrees relative to the fixed piece 22 of the ceiling hanging bracket 2.

[0051] After this, the pair of lower hex nuts 11A, 11B that make up the lower threaded component 11 are screwed in the tightening direction. As the screwing progresses, the coil spring assembly 10 is pushed by the lower threaded component 11 and moved upward Y1. As the screwing progresses further, the coil spring assembly 10 sequentially pushes the gauge component 8 and the ceiling suspension component 2, causing the first bolt insertion hole 2a of the ceiling suspension component 2, the second bolt insertion hole 8a of the gauge component 8, and the coil spring assembly 10 to sequentially approach the entry portion 72 provided in the rubber bushing 7, and the entry portion 72 enters the first bolt insertion hole 2a, the second bolt insertion hole 8a, and the interior of the coil spring assembly 10.

[0052] As a result, the hanging fitting body 21 of the ceiling hanging fitting 2 and the horizontal plate portion 82 of the gauge component 8 are sandwiched between the rubber bushing body 71 of the rubber bushing 7 and the upper cap component 6. In addition, the entry portion 72 is positioned between the hanging bolt T and the compression coil spring 3 in the radial direction XZ.

[0053] As the threading progresses further, the identification ring 4 is positioned at the upper end position S2 of the window portion 80, as shown in FIG. 6(B). When the identification ring 4 is positioned at the upper end position S2 of the window portion 80, the identification ring 4 is in a position that is visible through the window portion 80 of the shrinkage amount confirmation gauge 81. At this time, the assembly worker stops threading the lower threaded part 11 while confirming that the identification ring 4 is visible through the window portion 80 of the shrinkage amount confirmation gauge 81. Thus, when the identification ring 4 is in the upper end position S2 of the window portion 80, the compression coil spring 3 is in a compressed state with a load within the allowable range acting on it, and therefore the air conditioner K (ceiling-suspended equipment) is installed so as to exhibit vibration-proofing properties.

[0054] Here, a case where the identification ring 4 is positioned at position S3, which is above the upper end position S2 of the window 80 and is out of the window 80, will be described with reference to Figure 6(C). When the identification ring 4 is at position S3, out of the window 80, the compression coil spring 3 is in a compressed state with a load exceeding the allowable range acting on it, and as shown in Figure 6(C), the identification ring 4 is not in a position where it can be seen from the window 80 of the contraction amount confirmation gauge 81.

[0055] In this case, the assembly worker recognizes that the identification ring 4 is not in a position visible from the window portion 80 of the shrinkage confirmation gauge 81, and rotates the lower screw-on part 11 in the direction of loosening the fastening (screwing) so that the identification ring 4 is displaced downward Y2 from the position S3 where it is removed from the window portion 80.

[0056] As a result, the lower threaded part 11 moves downward Y2, reducing the load acting on the compression coil spring 3. Accordingly, the identification ring 4 is displaced downward Y2 from the position S3 where it is out of the window 80. At this time, the assembly worker realizes that the identification ring 4 is visible through the window 80 of the contraction amount confirmation gauge 81, and stops threading the lower threaded part 11. Accordingly, when the identification ring 4 is in a position visible through the window 80 of the contraction amount confirmation gauge 81, the compression coil spring 3 is in a compressed state with a load acting within the allowable range, and therefore the air conditioner K (ceiling-suspended equipment) is installed so as to exhibit vibration-proofing properties.

[0057] This completes the assembly of the vibration-proof structure 1. That is, the installation of the air conditioner K (ceiling-hanging equipment) using the vibration-proof structure 1 on the suspension bolts T is completed.

[0058] According to the above-described embodiment, the vibration-proof structure 1 (vibration-proof structure for ceiling-suspended equipment) is provided with a contraction amount confirmation gauge 81 having a window 80 for checking the contraction state of the compression coil spring 3 (elastic component) when the air conditioner K (ceiling-suspended equipment) is supported by the suspension bolt T. This makes it possible to check through the window 80 of the contraction amount confirmation gauge 81 whether the compression coil spring 3 is in an appropriate compressed state with a load acting within the allowable range. This makes it possible to easily check whether the air conditioner K (ceiling-suspended equipment) is installed to provide vibration-proofing properties.

[0059] The elastic part is a compression coil spring 3, and includes a lower cap part 5 (intervening part) through which the suspension bolt T is inserted and which is interposed between the compression coil spring 3 and the lower screw-on part 11, and an identification ring 4 (marker) provided on the lower cap part 5, and the identification ring 4 is provided in a position visible from the window part 80 when the air conditioner K (ceiling-suspended equipment) is supported by the suspension bolt T. Accordingly, when the identification ring 4 is in a position visible from the window part 80, the assembly worker can immediately recognize that the air conditioner K is installed to provide vibration damping. This makes it possible to confirm with even greater ease of work that the air conditioner K is installed to provide vibration damping.

[0060] Furthermore, the identification ring 4 (marker) is provided in a ring shape that can be fitted onto the lower cap part 5 (intervening part), and is colored a different color from the lower cap part 5. By providing the identification ring 4 in a color different from the lower cap part 5, the visibility of the identification ring 4 can be improved.

[0061] The gauge component 8 further includes a horizontal plate portion 82 that bends and extends from the upper end of the shrinkage amount confirmation gauge 81 and has a second bolt insertion hole 8a through which the suspension bolt T is inserted, and the second bolt insertion hole 8a is formed by cutting out an edge 8b of the horizontal plate portion 82. According to this, when assembling the gauge component 8 to the suspension bolt T, the horizontal plate portion 82 is inserted into the suspension bolt T so that the opening of the second bolt insertion hole 8a is close to the suspension bolt T, and the suspension bolt T is inserted into the second bolt insertion hole 8a. In this way, the gauge component 8 is assembled to the suspension bolt T. According to this, the gauge component 8 can be installed on the suspension bolt T with good workability.

[0062] Furthermore, the fact that the second bolt insertion hole 8a is formed by cutting out the edge 8b of the horizontal plate portion 82 is also effective, for example, when assembling the gauge component 8 to an existing vibration-proof structure. When assembling the gauge component 8 to an existing vibration-proof structure, the pair of lower hexagonal nuts 11A, 11B that constitute the lower threaded component 11 are loosened to move the coil spring assembly 10 downward Y2. Thereafter, the horizontal plate portion 82 may be inserted onto the suspension bolt T so that the entrance of the second bolt insertion hole 8a approaches the suspension bolt T, and the suspension bolt T may be inserted into the second bolt insertion hole 8a. In this way, because the second bolt insertion hole 8a is formed by cutting out the edge 8b of the horizontal plate portion 82, the gauge component 8 can be installed onto the suspension bolt T with good workability without dismantling the existing vibration-proof structure.

[0063] Furthermore, the window 80 is configured to have an opening formed by cutting out the lower end in the center in the width direction of the shrinkage amount confirmation gauge 81. Here, for example, if the window 80 were an opening formed by being surrounded on all four sides by a rim in the shrinkage amount confirmation gauge 81, it is possible that the window 80 would be hidden by the lower end of the shrinkage amount confirmation gauge 81 and the position of the identification ring 4 would not be known. However, because the window 80 is configured by cutting out the lower end, the assembly worker can immediately know the position of the identification ring 4 even if the identification ring 4 is located at the lower end of the shrinkage amount confirmation gauge 81.

[0064] Furthermore, in the above-described embodiment, the assembly procedure for using the vibration-proof structure 1 to support the air conditioner K on the hanging bolt T involves inserting the upper threaded part 12, rubber bushing 7, coil spring assembly 10, and lower threaded part 11 into the hanging bolt T in that order, then inserting the gauge part 8 above the coil spring assembly 10 and inserting the gauge part 8 into the hanging bolt T, and finally inserting the ceiling hanging bracket 2 to which the air conditioner K is fixed between the rubber bushing 7 and the gauge part 8, inserting the ceiling hanging bracket 2 into the hanging bolt T, and screwing the lower threaded part 11 in the tightening direction, thereby installing the air conditioner K (ceiling-hanging equipment) on the hanging bolt T using the vibration-proof structure 1, but the present invention is not limited to this.

[0065] In an assembly procedure for using the vibration-proof structure 1 to support an air conditioner K on a hanging bolt T, for example, the upper threaded part 12, rubber bushing 7, ceiling suspension bracket 2, gauge part 8, coil spring assembly 10, and lower threaded part 11 are sequentially inserted into the hanging bolt T. The lower threaded part 11 is then threaded in the tightening direction, and the threading is stopped when the identification ring 4 is positioned at the upper end position S2 of the window portion 80, as shown in FIG. 6(B). The upper threaded part 12 may then be rotated in the tightening (screwing) loosening direction, causing the upper threaded part 12 to move the rubber bushing 7 downward Y2, and bringing the rubber bushing main body 71 into contact with the hanging bracket main body 21 of the ceiling suspension bracket 2. Assembly of the vibration-proof structure 1 may be completed in this manner.

[0066] (Variation) Modified examples of the present invention will be described below with reference to Figs. 7 and 8. Fig. 7 is a side view showing a modified example of a vibration-proof structure 1A (vibration-proof structure for ceiling-suspended equipment), illustrating a state in which an air conditioner K (ceiling-suspended equipment) is supported by a suspension bolt T. Fig. 8 is a plan view showing a gauge component 18 including a contraction amount confirmation gauge 181 constituting a modified example of the vibration-proof structure 1A (vibration-proof structure for ceiling-suspended equipment). As shown in Figs. 7 and 8, the vibration-proof structure 1A according to the modified example differs from the vibration-proof structure 1 according to the above embodiment in the shapes of the contraction amount confirmation gauges 81, 181 and the shapes of the second bolt insertion holes 8a, 18a. In the modified example shown in Figs. 7 and 8, parts having the same shape or configuration as the above embodiment are assigned the same reference numerals as the above embodiment, and description of those parts will be omitted.

[0067] As shown in Figures 7 and 8, the gauge component 18 is configured to include a rectangular plate-shaped shrinkage confirmation gauge 181 having a window portion 80, and a plate-shaped horizontal plate portion 182 having a second bolt insertion hole 18a (shown in Figure 8) through which the suspension bolt T can be inserted.

[0068] As shown in Figure 7, the shrinkage confirmation gauge 181 includes a continuous portion 83 that continues below the horizontal plate portion 82 Y2, and a gauge portion 184 that is continuous below the continuous portion 83 Y2 and has a window portion 80.

[0069] 7, the gauge section 184 is provided on the lower Y2 side of the shrinkage amount confirmation gauge 81, and is configured to have a window section 80. In the gauge section 84, the window section 80 is provided in the center in the width direction (front-to-back direction X), and lower end sections 184d of the gauge section 84 on both sides of the window section 80 are configured to have straight sections such that the dimension in the width direction (front-to-back direction X) is constant at any position in the up-down direction Y.

[0070] The second bolt insertion hole 18a is provided in the center of the horizontal plate portion 182 and is formed in a perfect circle shape so that the suspension bolt T can be inserted therethrough.

[0071] According to the above-described embodiment, as shown in Fig. 7, the second bolt insertion hole 18a provided in the gauge component 18 of the vibration-proof structure 1A according to the modified example is formed in a perfect circular shape so that the suspension bolt T can be inserted therethrough. As a result, when the suspension bolt T is inserted through the second bolt insertion hole 18a, the second bolt insertion hole 18a is brought closer to the tip of the suspension bolt T. Compared to the notched second bolt insertion hole 8a, the second bolt insertion hole 18a cannot be inserted to insert the suspension bolt T, which makes assembly somewhat easier. However, the gauge component 18 has a shrinkage amount confirmation gauge 181 in the form of a rectangular plate with a window 80, which makes it possible to efficiently confirm that the air conditioner K (ceiling-suspended equipment) is installed to exhibit vibration-proofing properties.

[0072] (Other variations) Another modified example of the present invention will be described below with reference to Figs. 9 and 10. Fig. 9 is a perspective view showing another modified example of the vibration-proof structure for air conditioner K (ceiling-suspended equipment). Fig. 10 is an exploded perspective view showing another modified example of the vibration-proof structure for air conditioner K (ceiling-suspended equipment). As shown in Figs. 9 and 10, a vibration-proof structure 1B according to another modified example has a rubber part assembly 10B instead of the coil spring assembly 10. Also, as shown in Fig. 10, the lower threaded part 11 is configured to have a washer 11C in addition to a pair of lower hexagonal nuts 11A and 11B.

[0073] As shown in Figures 9 and 10, the rubber part assembly 10B comprises a rubber part 3B (elastic part) made of contractile rubber and capable of absorbing shocks and vibrations in the compression direction, and a rubber bushing 7B that sandwiches the hanging bracket main body 21 and gauge part 8 of the ceiling hanging bracket 2 between the rubber part 3B and the rubber bushing 7B.

[0074] As shown in Figure 10, the rubber part 3B is configured to integrally include a rubber part main body 31 located below Y2 the horizontal plate portion 82 of the gauge part 8, a first bolt insertion hole 2a located in the ceiling suspension fitting 2, a second bolt insertion hole 8a located in the gauge part 8, and a tubular insertion portion 32 that is capable of entering the rubber bushing 7B described below.

[0075] The rubber part main body 31 and the cylindrical entry portion 32 are configured in a cylindrical shape that allows the suspension bolt T to be inserted therethrough, and the outer diameter of the rubber part main body 31 is larger than the outer diameter of the cylindrical entry portion 32. The cylindrical entry portion 32 is provided above the rubber part main body 31, Y1.

[0076] As shown in FIG. 10, the rubber bushing 7B is provided on the upper surface of the hanging fixture body 21 of the ceiling hanging fixture 2, and is configured in a circular ring shape through which the hanging bolt T can be inserted.

[0077] When such a rubber part assembly 10B is supported by the hanging bolt T, the cylindrical entry portion 32 provided in the rubber part 3B is inserted into the second bolt insertion hole 8a provided in the gauge part 8, the first bolt insertion hole 2a provided in the ceiling hanging fitting 2, and the rubber bushing 7B.

[0078] Furthermore, the assembly procedure for supporting an air conditioner K on the suspension bolts T using such a vibration-proof structure 1B (vibration-proof structure for ceiling-suspended equipment) may be the same as the assembly procedure described above. That is, with the air conditioner K (ceiling-suspended equipment) supported on the suspension bolts T, the lower end 3b of the rubber part 3B may be used as a landmark to confirm that the lower end 3b is in a position visible through the window 80. In this way, even if a rubber part assembly 10B including the rubber part 3B is used instead of the coil spring assembly 10, it is possible to confirm through the window 80 of the contraction amount confirmation gauge 81 that the rubber part 3B is in an appropriate compressed state with a load acting within the allowable range. This provides substantially the same effects as the above-described embodiment.

[0079] The present invention is not limited to the above-described embodiment, but includes other configurations that can achieve the object of the present invention, and the following modified examples are also included in the present invention.

[0080] In the above embodiment, the window 80 has an opening formed by cutting out the lower end of the shrinkage confirmation gauge 81, but the present invention is not limited to this. The window may be an opening formed by surrounding the gauge 81 on all four sides. The window may also be formed by cutting out an edge on one side in the width direction of the shrinkage confirmation gauge 81, or may be formed by cutting out an edge on the other side in the width direction of the shrinkage confirmation gauge 81.

[0081] In the above embodiment, the identification ring 4 is provided as an example of a mark, but the present invention is not limited to this. For example, the mark may be a horizontal line added to the lower cap component 5 (intervening component), or the upper or lower end of the lower cap component 5 or the ring receiving portion 56 may be used as a mark to check the contracted state of the compression coil spring 3 (elastic component), or the lower end 3b of the rubber component 3B (elastic component) may be used as a mark to check the contracted state of the rubber component 3B. In this case, the identification ring 4 may be omitted.

[0082] In the above embodiment, the compression coil spring 3 and the rubber part 3B are provided as examples of the elastic part, but the present invention is not limited to this. For example, the elastic part may be a leaf spring, or any other part that is configured to be contractible.

[0083] Although the best configurations and methods for carrying out the present invention have been disclosed above, the present invention is not limited thereto. That is, although the present invention has been particularly illustrated and described mainly with reference to specific embodiments, those skilled in the art can make various modifications to the above-described embodiments in terms of shape, material, quantity, and other detailed configurations without departing from the scope of the technical idea and purpose of the present invention. Therefore, the above-disclosed descriptions limiting the shape, material, etc. are provided as examples to facilitate understanding of the present invention and are not intended to limit the present invention. Therefore, descriptions using names of components that are free from some or all of the limitations on shape, material, etc. are included in the present invention. [Explanation of symbols]

[0084] 1, 1A, 1B Anti-vibration structure (anti-vibration structure for ceiling-suspended equipment) 2 Ceiling mount 21 Hanging bracket body (mounting part) 22 Fixed piece 2a First bolt insertion hole 3 Compression coil springs (elastic parts) 3B Rubber parts (elastic parts) 3b Bottom end of rubber part (mark) 4 Identification ring (marker) 5 Lower cap part (intervening part) 80 Window 81, 181 Shrinkage amount confirmation gauge 82, 182 Horizontal plate section 11 Lower threaded part K Air conditioner (ceiling-mounted equipment) KS Side of ceiling-mounted equipment (side of air conditioner) T-hanging bolt

Claims

1. A vibration-proof structure for a ceiling-suspended device that is installed on a ceiling surface via a suspension bolt hanging down from the ceiling surface, a ceiling hanging bracket including a mounting portion having a first bolt insertion hole through which the hanging bolt is inserted, and a plate-shaped fixing piece that is bent at an end of the mounting portion and fixed to a side surface of the ceiling-hanging device; a contractible elastic part through which the suspension bolt is inserted and which is positioned below the mounting part; a lower threaded part that is threadedly engaged with the hanging bolt and supports a lower end of the elastic part; and a contraction amount confirmation gauge having a window for confirming the contraction state of the elastic part.

2. the elastic component is a compression coil spring, an intervening part through which the suspension bolt is inserted and which is interposed between the compression coil spring and the lower threaded part; and a mark provided on the intervening part, 2. The vibration-proof structure for ceiling-suspended equipment according to claim 1, wherein the mark is located in a position visible through the window when the ceiling-suspended equipment is supported by the suspension bolts.

3. The vibration-proof structure for ceiling-suspended equipment according to claim 2, characterized in that the mark is provided in the shape of a ring that can be inserted into the intervening part and is colored a different color from the intervening part.

4. a horizontal plate portion that is bent and extends from an upper end of the shrinkage confirmation gauge and has a second bolt insertion hole through which the suspension bolt is inserted; 2. The vibration-proof structure for ceiling-suspended equipment according to claim 1, wherein the second bolt insertion hole is formed by cutting out an edge of the horizontal plate portion.

5. The vibration-proof structure for ceiling-hanging equipment described in claim 1, characterized in that the window portion is provided in the center of the shrinkage confirmation gauge and is an opening formed by cutting out the lower end of the shrinkage confirmation gauge.

Images