JP2017125332A - Shock-reducing structure and construction method for the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shock-reducing structure capable of stably supporting equipment even when subjected to a shock of an earthquake and the like, by reducing vibrations of a hanging bolt for supporting the equipment, in a structure for hanging the equipment from a ceiling and supporting it, and a construction method for the same.SOLUTION: A shock-reducing structure 11 includes first and second shock-reducing members 18 and 19, and a position regulating member. A pair of first-third members constituting the first shock-reducing member 18 is made of a half-split body divided in half to pass through first and second through-holes.SELECTED DRAWING: Figure 1

Description

  The present invention provides a structure for supporting a facility device in a ceiling so that the vibration of the suspension bolt that supports the facility device is reduced, thereby reducing the vibration that can stably support the facility device even when subjected to a shake such as an earthquake. It is related with the construction method of a structure and a seismic reduction structure.

2. Description of the Related Art Conventionally, buildings such as condominiums and buildings have various types of equipment installed in air conditioning equipment, lighting equipment, air conditioning ducts, various pipes, and the like. These equipments are supported by a ceiling suspended structure.
FIG. 23 is a perspective view showing an example of a conventional ceiling-suspended structure.
Referring to FIG. 23, the conventional ceiling suspension structure 100 suspends four suspension bolts 104 from the ceiling structure 101 through inserts 102 that are attached to be embedded in the ceiling structure 101, and each suspension bolt 104. The bottom part of the equipment device W is supported by a connection fitting 103 provided at the lower end of the equipment.
The ceiling suspension structure 100 having such a structure is greatly swayed when a vibration such as an earthquake is applied, and the suspension bolt 104 is repeatedly greatly bent.

FIG. 24 is a diagram schematically showing a deformation state of the suspension bolt when an earthquake shake is applied to the ceiling suspension structure shown in FIG.
Specifically, as shown in FIG. 24, when an earthquake force occurs and a force F due to acceleration acts on the equipment W, bending suspension acts on the suspension bolt 104 (in FIG. 24). (See the suspension bolt 104 indicated by the two-dot chain line.)

  When the magnitude of the earthquake is small, the suspension bolt 104 can withstand shaking with its own rigidity. On the other hand, when the magnitude of the earthquake is large and the acceleration increases, the stress concentrates on the base end side of the suspension bolt 104 protruding downward from the ceiling structure 101 and the root portion near the ceiling structure of the suspension bolt 104, Depending on the scale, the suspension bolt 104 may be broken.

  In recent years, depending on the structure of the building, the length of the suspension bolt 104 disposed below the lower surface 101a of the ceiling structure 101 may be long (for example, 1000 mm to 1800 mm). In such a case, if the magnitude of the earthquake is large, the suspension bolt 104 is likely to break.

  In addition, when deformation such as bending or twisting occurs in the connection fitting 103 due to bending deformation of the suspension bolt 104, the bolt fastening portion between the connection fitting 103 and the suspension bolt 104 is loosened, and the connection fitting 103 may fall off. .

Further, the greater the earthquake vibration, the greater the effect, and there was a risk that the equipment W would fall depending on a large-scale earthquake. For example, at the time of the huge earthquake that occurred in the Tohoku region in March 2011, many falling equipment devices W occurred, and at present, further measures for strengthening the suspended structure are required.
As an example of a conventional measure for reinforcing the ceiling suspension structure, there is a brace shown in FIG.

FIG. 25 is a side view showing an example of reinforcement of a ceiling suspension structure using a conventional brace.
Referring to FIG. 25, in an example of reinforcement of a ceiling suspension structure by a conventional brace 110, a structure in which two braces 110 are crossed so as to connect two suspension bolts 109 arranged opposite to each other. Used.
The brace 110 has one end fixed to the suspension bolt 109 located near the ceiling slab via the connection fitting 111 and the other end located near the lower end of the suspension bolt 109 via the connection fitting 112. It is fixed.

  When reinforcing using the brace 110 shown in FIG. 25, two braces 110 that intersect on any of the four side surfaces of the equipment device 106 with respect to the four suspension bolts 109 that suspend and support the equipment device 106. Need to be placed. Therefore, it is necessary to use a total of eight braces 110 in the conventional reinforcing structure shown in FIG.

JP 2013-211510 A

By the way, when ducts or other devices are disposed in the upper space of the facility device 106, the brace 110 may not be installed on the suspension bolt 109.
Even if it can be installed, in order to install the brace 110 in a state avoiding interference with ducts and other devices, the brace 110 is placed at an appropriate position of the suspension bolt 109 (a position where the effect of the brace 110 is most effective). ) Is difficult to install, and the suspension bolt 104 cannot be sufficiently reinforced.
In particular, when the length of the suspension bolt 104 is long (for example, 1000 mm to 1800 mm), the above problem becomes significant.

  Moreover, as a vibration-reducing structure for reducing the vibration of the suspension bolt 104 in the event of an earthquake, not only the newly installed suspension bolt 104 but also an already installed suspension bolt 104 (existing suspension bolt 104) can be easily used. Even if it can be constructed and applied to the hanging bolt 104 having a long length (for example, 1000 mm to 1800 mm), a thing capable of obtaining a sufficient seismic reduction effect is desired.

  Therefore, the present invention can be easily applied not only to newly installed suspension bolts but also to existing suspension bolts that support equipment devices, while suppressing interference with ducts and other devices, and An object of the present invention is to provide a vibration-reducing structure capable of reducing the vibration of a long suspension bolt and a method for constructing the vibration-reducing structure.

  In order to solve the above-described problem, according to one aspect of the present invention, a plurality of members that are suspended from the ceiling and are suspended from the ceiling by being fixed to a fixing member provided in the ceiling, are suspended from the ceiling. A seismic-reduction structure provided on a suspension bolt, comprising: a hollow portion provided on each of the plurality of suspension bolts located below the fixing member, to which a part of the suspension bolt communicates, A first vibration reducing member for reducing vibration of the bolt, and the first vibration reducing member disposed in the first vibration reducing member, pressing the first vibration reducing member against the fixing member, and reducing vibration of the suspension bolt A second damping member to be moved and a position regulating member that regulates a position of a lower end of the first damping member with respect to the suspension bolt, wherein the first damping member is a pair of first members. A pair of second members and the pair of first parts And a pair of third members that house the pair of second members, and the pair of first members are arranged to face each other and extend in the extending direction of the suspension bolt A first plate portion and a first direction extending in a plane direction perpendicular to the extending direction of the suspension bolt, connected to the upper ends of the two first plate portions, and penetrating through the suspension bolt in the center. Of the four side end portions of the quadrangular top plate portion having the through holes and the two first plate portions, the second plate connected to the two side wall portions and the top plate portion arranged to face each other. The first structure body is divided into two so that the first structure body having a portion passes through the center of the first through hole and the second plate portion. The pair of second members are arranged opposite to each other, and are provided with two third plate portions extending in the extending direction of the suspension bolt, and the suspension bolt. A rectangular bottom plate portion extending in a plane direction orthogonal to the extending direction of the first and second ends, connected to the lower ends of the two third plate portions, and having a second through hole through which the suspension bolt penetrates in the center; A second structure having two side end portions opposed to each other among four side end portions of the two third plate portions, and a fourth plate portion connected to the bottom plate portion. The second structure body is divided into two parts so that the body passes through the center of the second through hole and the fourth plate part, and the pair of third members is The upper and lower ends are open ends, and form a third structure body that is a quadrangular columnar member having the hollow portion that houses the first and second structure bodies therein, and the pair of first The third member extends in the extending direction of the suspension bolt, and has a fifth plate portion that contacts the second and fourth plate portions, and the suspension member. A sixth plate portion extending in the extending direction of the bolt and disposed so as to face the fifth plate portion and in contact with the first and second structures, and the extending direction of the suspension bolt A seventh plate portion that is in contact with one of the first and third plate portions and connected to the fifth and sixth plate portions, and extends in the direction in which the suspension bolt extends. The third structure body having the eighth plate portion in contact with the other first and third plate portions and connected to the fifth and sixth plate portions, And the seventh plate portion and the eighth plate portion are divided into two so as to pass through the second through hole, and the two first plate portions and the second plate portion Formed by two corners extending in the extending direction of the suspension bolt, the two third plate portions, and the fourth plate portion, and extending in the extending direction of the suspension bolt 2 to do And the corner portion of the GenShin structure characterized by being in contact with the two corners adjacent formed inside of the third structure is provided.

According to the vibration-reducing structure of one aspect of the present invention, the first vibration-reducing member functions as a brace of the suspension bolt by providing the first vibration-reducing member configured as described above on the suspension bolt. In addition to suppressing interference with ducts and other equipment, the vibration of the suspension bolt due to an earthquake or the like can be reduced together with the second vibration reducing member.
Further, the pair of first to third members constituting the first vibration reducing member is divided into two equal parts so as to pass through the first and second through holes (through holes in which the suspension bolts are arranged). Since it is composed of a split body, it can be easily applied not only to newly-suspended suspension bolts but also to existing suspension bolts that support equipment.
Furthermore, by increasing only the length of the pair of third members in the extending direction of the suspension bolt (in other words, increasing the length of the pair of first and second members in the extending direction of the suspension bolt). Even when the length of the suspension bolt is long (for example, when the length of the suspension bolt is about 1000 mm to 1800 mm), the vibration of the suspension bolt can be reduced.

  Further, in the above-mentioned vibration reduction structure, the first vibration reduction member includes an upper member and a lower member instead of the pair of first members and the pair of second members, The upper member is a member in which the pair of first members are integrated, and instead of the first through hole, the outer edge of the top plate portion where the first and second plate portions are not provided. From the first through hole to the position where the first through hole is formed, and has a first suspension bolt insertion groove into which the suspension bolt is inserted, and the lower member is The pair of second members are integrated, and instead of the second through hole, the second and second plate portions are provided from the outer edge of the bottom plate portion where the third and fourth plate portions are not provided. The second plate is provided on the bottom plate portion so as to extend to the formation position of the through hole, and the suspension bolt is inserted therein. It may have a hanging bolt insertion groove.

Thus, instead of the pair of first members and the pair of second members, an upper member including a first suspension bolt insertion groove and a lower member including a second suspension bolt insertion groove are provided. Thus, the number of parts of the first vibration reducing member can be reduced.
In addition, by having the first and second suspension bolt insertion grooves, even when the first vibration reducing member is attached to the existing bolt, the bolt can be easily arranged in the upper member and the lower member. Therefore, it is possible to easily perform the construction on the existing bolt.

  In the above-described vibration-reducing structure, the pair of third members may be fixed to the pair of first members and the pair of second members by welding.

  In this manner, the pair of third members, the pair of first members, and the pair of second members are fixed to the pair of first and second members by welding. Since a plurality of screws to be fixed becomes unnecessary, the number of parts of the first vibration reducing member can be reduced. Thereby, the cost of the seismic-reduction structure containing a 1st seismic-reduction member and the construction man-hour at the field can be reduced.

  Further, in the above-described vibration-damping structure, the pair of third members may be fixed to the pair of first members and the pair of second members with a plurality of screws.

  Thus, instead of welding, the pair of third members may be fixed to the pair of first and second members using a plurality of screws. When using a plurality of screws, the first vibration reducing member can be easily attached to and detached from the suspension bolt as compared with the case of welding.

  Moreover, in the above-mentioned seismic attenuation structure, the pair of third members may be fixed to the upper member and the lower member by welding.

  Thus, by fixing the pair of third members to the upper member and the lower member by welding, a plurality of screws for fixing the pair of third members, the upper member, and the lower member are unnecessary. Therefore, the number of parts of the first vibration reducing member can be reduced. Thereby, the cost of the vibration-reducing structure including the second vibration-reducing member and the number of on-site construction steps can be reduced.

  Further, in the above-described vibration-damping structure, the pair of third members may be fixed to the upper member and the lower member with a plurality of screws.

  Thus, instead of welding, the pair of third members may be fixed to the upper member and the lower member using a plurality of screws. When using a plurality of screws, the first vibration reducing member can be easily attached to and detached from the suspension bolt as compared with the case of welding.

  Further, in the above-described vibration-reducing structure, the second vibration-reducing member is provided so as to extend from the nut portion in the central axis direction of the nut portion to which the suspension bolt is screwed, A cylindrical support portion through which the suspension bolt can be inserted; and a cylindrical attenuation member that is inserted into the support portion and surrounds the suspension bolt. The insertion hole through which the suspension bolt is inserted in the support portion The damping member is made of a rubber or elastomeric material having a rubber hardness of 60 degrees or more and a loss factor (tan δ) of 0.5 or more. It may be a damping material.

Thus, by having the second vibration damping member including a damping member made of a rubber-based or elastomer-based high damping material having a rubber hardness of 60 degrees or more and a loss coefficient (tan δ) of 0.5 or more, When equipment is vibrated due to the occurrence of an earthquake, etc., the vibration is transmitted to the whole of the vibration-reducing structure, and the first vibration-reducing member withstands the vibration due to its own brace function. The moment stress is concentrated.
At this time, the damping member constituting the second vibration-reducing member provided on the suspension bolt consumes vibration energy from the outside by attenuation or absorption.
As described above, by using a rubber-based or elastomer-based high-damping material having a rubber hardness of 60 degrees or more and a loss coefficient (tan δ) of 0.5 or more as the material of the damping member, the ceiling of the suspension bolt is used. It is possible to effectively reduce the vibration with respect to a suspension bolt that vibrates with a small amplitude at a nearby position.

Thereby, the vibration energy amount which acts on the suspension bolt among the total energy amount of vibration is consumed, and the vibration load on the suspension bolt is reduced. Therefore, the vibration of the equipment and the suspension bolt can be reduced.
As a result, in addition to the effect of the first vibration reducing member, the vibration suppressing effect of the damping member is added, the breakage or deformation of the suspension bolt can be suppressed, and the equipment can be stably suspended from the ceiling. .
Furthermore, since the second vibration-reducing member for obtaining a vibration-reducing effect is attached near the ceiling of the suspension bolt, a special installation space is almost unnecessary, so piping and other devices are installed around the equipment. Even if it is, it can be installed easily.

  Further, in the above-described vibration-reducing structure, the second vibration-reducing member includes a high nut into which the suspension bolt is screwed, an upper insertion hole into which a lower side of the high nut can be fitted, and the upper insertion hole And a cylindrical damping member having a lower insertion hole through which the suspension bolt can be inserted. The material of the damping member has a rubber hardness of 60 degrees or more and a loss coefficient (tan δ) of 0. Five or more rubber-based or elastomer-based high damping materials may be used.

  Thus, as the material of the damping member, a rubber-based or elastomer-based high damping material having a rubber hardness of 60 degrees or more and a loss coefficient (tan δ) of 0.5 or more can be used. It is possible to effectively reduce the vibration with respect to the suspension bolt that vibrates with a small amplitude at the position.

  Further, in the above-described vibration-damping structure, the second vibration-damping member includes a high nut to which the suspension bolt is screwed, and a resin-made member attached to the high nut so as to surround the high nut at an upper portion. A cylindrical support portion; and a damping member disposed at an inner lower portion of the support portion, wherein the resin-made cylindrical support portion is divided into two halves, and one of the half halves On the other hand, the other halved body may be hinged so as to be freely opened and closed.

  By setting it as such a structure, it becomes possible to mount | wear with a 2nd vibration-reduction member to a suspension bolt from the side of a suspension bolt. Thereby, it is possible to easily attach the second vibration-reducing member to the existing suspension bolt that supports the equipment.

  According to another aspect of the present invention, a vibration-reducing structure according to any one of claims 1, 3, 4, and 7 to 9 with respect to the newly installed suspension bolt. A method of constructing a vibration-reducing structure for constructing a body, wherein the one third member, the pair of first members, and the pair of second members are welded, A preparatory step of preparing the other third member, a member attaching step of attaching the second vibration reducing member and the position regulating member to the suspension bolt, and the first member provided in the structure The suspension bolt insertion step of inserting the suspension bolt into the first and second through holes, and the suspension member using the second vibration reducing member so as to press the first vibration reducing member against the fixing member. A first position regulating step for regulating the position of the upper end of the structure relative to the bolt; A second position restricting step for restricting a position of the lower end of the structure relative to the suspension bolt using a placement restricting member; and the other for the pair of first and second members constituting the structure And a welding process for welding the third member of the present invention.

  According to the vibration-reducing structure of another aspect of the present invention, a structure in which one third member, a pair of first members, and a pair of second members are welded is prepared in advance. (Specifically, the structure is prepared at a stage before going to the construction site), so that the other first member and the second member constituting the structure at the construction site. Since it is only necessary to weld the three members, the first vibration reducing member can be easily attached to the suspension bolt. That is, the construction time of the first vibration reducing member at the site can be shortened.

  According to another aspect of the present invention, a vibration-reducing structure for constructing the vibration-reducing structure according to any one of claims 1, 3, 4, and 7 to 9 with respect to the existing suspension bolt. A construction method in which one of the third members, the pair of first members, and the pair of second members are welded, and the other third member, And a pair of first and second members constituting the structure, a preparation step for preparing the structure, a member attaching step for attaching the second vibration-reducing member and the position regulating member to the suspension bolt, By opening in the lateral direction, a groove for guiding the suspension bolt is formed in the first and second through holes, and the suspension bolt is inserted into the first and second through holes via the groove. A suspension bolt inserting step, and so as to press the first vibration reducing member against the fixing member, A first position regulating step for regulating the position of the upper end of the structure relative to the suspension bolt using the second vibration reducing member, and a lower end of the structure relative to the suspension bolt using the position regulating member A second position regulating step for regulating the position of the second member, a welding step for welding the other third member to the pair of first members and the second member constituting the structure, The construction method of the seismic-reduction structure characterized by including is provided.

  According to the construction method of the vibration-reducing structure according to the other aspect of the present invention, a structure in which one third member, a pair of first members, and a pair of second members are welded is prepared. By doing so, the pair of first and second members exposed from one third member are expanded in the lateral direction, and the suspension bolt can be easily inserted into the first and second through holes from the side of the suspension bolt. It becomes possible to store the first vibration reducing member with respect to the suspension bolt. That is, the construction time of the first vibration reducing member at the site can be shortened.

  In the construction method for the seismic reduction structure, in the preparation step, the one third member, the pair of first members, and the pair of second members instead of the welded structure. And preparing a structure temporarily fixed with a plurality of screws screwed to the middle, and completely screwing the plurality of screws after the suspension bolt inserting step with the one third member The pair of first members and the pair of second members are completely fixed, and the welding process is replaced with a pair of screws that constitute the structure using a plurality of screws. Fixing the other third member to the first member and the second member may be included.

  Thus, in the preparation step, by preparing a structure in which one third member, a pair of first members, and a pair of second members are screwed together halfway with screws, The pair of first and second members exposed from the third member can be expanded in the lateral direction so that the suspension bolt can be easily stored in the first and second through holes from the side of the suspension bolt. Become. As a result, the first vibration reducing member can be easily attached to the suspension bolt. That is, the construction time of the first vibration reducing member at the site can be shortened.

  According to the construction method of the seismic-reduction structure of the other viewpoint of this invention, it installs newly or any one of Claims 5, 5, and 6-9 with respect to the said existing suspension bolt. A method of constructing a vibration-reducing structure for constructing a vibration-reducing structure, wherein the second member and the fourth member are in contact with the third member. , A preparation step of preparing a structure in which the upper member and the lower member are welded, and the other third member, the suspension bolt, the second vibration reducing member, and A member attaching step for attaching the position restricting member, and the suspension bolt is inserted into the first and second suspension bolt insertion grooves provided in the structure, and the suspension bolt is attached to the first and second suspension bolts. A suspension bolt inserting step to be arranged in the back of the bolt insertion groove, and the structure is fixed to the fixing portion. A first position regulating step for regulating the position of the upper end of the first vibration reducing member with respect to the suspension bolt using the second vibration reducing member, and the position regulating member, A second position regulating step for regulating the position of the lower end of the structure relative to the suspension bolt, and welding the other third member to the upper member and the lower member constituting the structure. A method of constructing a seismic reduction structure characterized by comprising a welding step.

  According to the construction method of the vibration-reducing structure according to another aspect of the present invention, since the structure has the first and second suspension bolt insertion grooves, a newly installed suspension bolt or an existing suspension bolt is used. However, construction can be easily performed by the same method.

  In the construction method of the seismic attenuation structure according to the other aspect, in the preparation step, the one third member, the upper member, and the lower member are replaced with the welded structure. A structure fixed with a plurality of screws is prepared, and instead of the welding step, the plurality of screws are used to form the other member with respect to the upper member and the lower member constituting the structure. And fixing the three members.

  In this way, the pair of third members may be fixed to the upper member and the lower member using a plurality of screws.

  According to the present invention, it is possible to easily construct a vibration-reducing structure not only for a newly provided suspension bolt but also for an existing suspension bolt that supports equipment, and to reduce vibration of a long suspension bolt. Can be made.

It is a fragmentary sectional view showing the suspension equipment with a seismic-reduction structure provided with the seismic-reduction structure concerning a 1st embodiment of the present invention. It is a perspective view of the 1st vibration-reduction member of the stage (shipment stage) before attaching to a suspension bolt. It is a top view of a pair of 1st member shown in FIG. It is the side view which looked at the 1st member shown in FIG. It is the side view which looked at a pair of 1st member shown in FIG. 3 in B. It is a top view of a pair of 2nd member shown in FIG. It is the side view which looked at the 2nd member shown in Drawing 6 C. It is the side view which looked at D of a pair of 2nd member shown in FIG. It is a top view of a pair of 3rd member shown in FIG. It is the side view which looked at the 3rd member shown in FIG. It is the side view which looked at a pair of 3rd member shown in FIG. It is the side view to which the 1st vibration-reduction member attached to the suspension bolt was expanded. It is the side view which looked at the 1st vibration-reduction member shown in FIG. It is a figure which shows an example of the 2nd vibration-reduction member which comprises the ceiling suspension apparatus with a vibration-reduction structure shown in FIG. 1, (A) is the side view which illustrated a part in cross section, (B) is a plane FIG. 4C is a bottom view. It is a perspective view which shows an example of the 2nd vibration-reduction member shown in FIG. It is a side view of the 2nd vibration-reduction member which concerns on the 2nd Embodiment of this invention. It is a figure which shows the 2nd vibration-reduction member which concerns on the 3rd Embodiment of this invention, (A) is a side view of a 2nd vibration-reduction member, (B) is a 2nd vibration-reduction member. It is a perspective view showing typically the state where the cylindrical support part half which constitutes was opened. It is sectional drawing of the 2nd vibration-reduction member which concerns on the 4th Embodiment of this invention. It is a side view of the 2nd vibration-reduction member which concerns on the 5th Embodiment of this invention. It is a fragmentary sectional view of the 2nd vibration-reduction member which concerns on the 6th Embodiment of this invention. It is a fragmentary sectional view which shows the ceiling suspension apparatus with a vibration-reduction structure provided with the vibration-reduction structure which concerns on the 7th Embodiment of this invention. It is a perspective view of the 1st vibration reduction member which concerns on the 8th Embodiment of this invention, and is a figure which shows typically the 1st vibration reduction member of the stage (shipment stage) before attaching to a suspension bolt. It is a perspective view which shows an example of the conventional ceiling-suspended structure. It is a figure which shows typically the deformation | transformation state of a suspension volt | bolt when the shaking of an earthquake acts on the ceiling suspension structure shown in FIG. It is a side view which shows an example of reinforcement of the ceiling suspension structure body by the conventional brace.

  Embodiments to which the present invention is applied will be described below in detail with reference to the drawings. The drawings used in the following description are for explaining the configuration of the embodiment of the present invention. The size, thickness, dimensions, and the like of each part shown in the drawings are the actual suspension device 1 with a vibration-reducing structure. It may be different from the dimension relation.

(First embodiment)
FIG. 1 is a partial cross-sectional view showing a ceiling-suspended device with a vibration-reducing structure including a vibration-reducing structure 11 according to a first embodiment of the present invention.
Referring to FIG. 1, a ceiling-suspended device 1 with a vibration-reducing structure includes a vibration-reducing structure 11.
The ceiling-suspended device 1 with a seismic-reducing structure has four suspensions whose upper ends are screwed through fixing members 2 (fixing tools) embedded in the bottom of a ceiling frame F (for example, a ceiling concrete structure). The bolt 3 is suspended in the vertical direction.

At the lower ends of the four suspension bolts 3, connecting tools 5 are provided, and the equipment 6 is suspended and supported via the connecting tools 5.
A deck plate 4 is provided at the bottom of the ceiling body F. Therefore, each suspension bolt 3 is suspended through the deck plate 4.

  Examples of the equipment 6 include various installed devices such as an indoor unit and an outdoor unit of a room air conditioner, an air conditioning duct, a storage box for a blower fan, and a piping and cable storage unit. In FIG. 1, as an example, an indoor unit of a room air conditioner having a square box shape is illustrated.

  In the following description, when it is necessary to explain the direction, the direction parallel to the groove 4A of the deck plate 4 (the depth direction of the equipment 6) is defined as the x direction as shown in FIG. A direction perpendicular to the grooves of the plate 4 (groove width direction: left and right direction of the equipment device 6) is defined as the y direction, and a vertical direction (height direction of the equipment device 6) is defined as the z direction.

  In FIG. 1, only two suspension bolts 3 are illustrated on the left and right sides of the facility device 6, but two suspension bolts are also provided at predetermined positions in the depth direction (x direction) of the facility device 6 not illustrated in FIG. 1. 3 is suspended, and a box-type facility device 6 is suspended and supported by a total of four suspension bolts 3.

  Note that the number of the suspension bolts 3 for hanging and supporting the equipment 6 may be an arbitrary number depending on the scale and length of the equipment 6, and the length of the duct when the equipment 6 is a long object such as a duct. A plurality of suspension bolts 3 are installed at necessary intervals in the direction.

  In addition, when the equipment 6 is a small structure such as a small-scale pipe or wiring, a plurality of suspension bolts 3 suspended on the pipe or wiring are provided in the length direction of the pipe or wiring. It becomes the structure which this arrangement | positions and hangs. Of course, the structure of the present application can also be applied to equipment that can be supported by one suspension bolt 3.

Two sets of support pieces 6a are formed in a projecting manner in the horizontal direction (y direction or -y direction) at the lower portions of both side surfaces of the box-type equipment 6 and these support pieces 6a are connected to a connecting tool 5 such as an S-shaped bracket. It is connected to the lower end part of each suspension bolt 3 via.
The connector 5 includes a lower support piece 5a that is horizontally stacked on the support piece 6a and is connected to the support piece 6a by a bolt 8 and a nut 9, and an extending piece 5b that is erected at a right angle to the lower support piece 5a. And an upper support piece 5c that extends horizontally from the upper end of the extension piece 5b, penetrates the suspension bolt 3, and is connected to the suspension bolt 3 by a nut 10 screwed to the suspension bolt 3.

In the suspension bolt 3, a vibration reducing structure 11 is provided at a portion protruding downward from the lower surface of the ceiling body F (the lower surface of the deck plate 4).
The vibration reduction structure 11 includes a first vibration reduction member 18, a second vibration reduction member 19, and a position restriction member 20.

  FIG. 2 is a perspective view of the first vibration reducing member at a stage (shipment stage) before being attached to the suspension bolt. In FIG. 2, the other third member 23 </ b> B is not fixed to the structure 25 with the screw 24, but the first vibration reducing member 18 is fixed to the suspension bolt 3. For this, the other third member 23 </ b> B is fixed to the structure 25 using a plurality of screws 24.

  Referring to FIG. 2, the first vibration reducing member 18 includes a pair of first members 21A and 21B, a pair of second members 22A and 22B, a pair of third members 23A and 23B, and a plurality of members. Screw 24.

  FIG. 3 is a plan view of the pair of first members shown in FIG. FIG. 4 is a side view of the first member shown in FIG. FIG. 5 is a side view of the pair of first members shown in FIG. 3 to 5, the same components are denoted by the same reference numerals.

  Referring to FIGS. 1 to 5, the pair of first members 21 </ b> A and 21 </ b> B are arranged to face each other, extend in the extending direction (z direction) of the suspension bolt 3, and have a plurality of screw holes 21-4. The two first plates extending in the surface direction (surface direction passing through the x direction and the y direction) perpendicular to the extending direction of the suspension bolt 3 and the two first plate portions 21-1 provided. A square top plate portion (a configuration corresponding to the two top plate portions 21-2 before the division) that is connected to the upper end of the portion 21-1 and has a first through hole 21-5 through which the suspension bolt 3 passes. ) And two side wall portions and the top plate portion of the four side end portions of the two first plate portions 21-1 (a configuration corresponding to the two top plate portions 21-2 before the division). ) And a second plate portion (a configuration corresponding to the two second plate portions 21-3 before the division) connected to the first structure body 21 The first structure 25 is divided into two parts so as to pass through the center of the through hole 21-5 and the second plate part (a configuration corresponding to the two second plate parts 21-3 before the division). It consists of

Screws 24 for fixing the pair of third members 23A, 23B to the pair of first members 21A, 21B are screwed into the screw holes 21-4. The first through hole 21-5 is a through hole for accommodating the suspension bolt 3.
When the length of the pair of third members in the z direction is 1, the length of the pair of first members 21A and 21B in the z direction can be set to be ½ or less, for example. .

  6 is a plan view of a pair of second members shown in FIG. FIG. 7 is a side view of the second member shown in FIG. FIG. 8 is a side view of the pair of second members shown in FIG. 6-8, the same code | symbol is attached | subjected to the same component.

  Referring to FIGS. 1, 2, and 6 to 8, the pair of second members 22 </ b> A and 22 </ b> B are arranged to face each other, extend in the extending direction of the suspension bolt 3, and have a plurality of screw holes 22-. 4 is provided, and extends in a plane direction orthogonal to the extending direction of the suspension bolt 3 and is connected to the lower ends of the two third plate parts 22-1; In addition, a rectangular bottom plate portion (a configuration corresponding to the two bottom plate portions 22-2 before division) having a second through hole 22-5 through which the suspension bolt 3 penetrates, and two third plate portions 22- Among the four side end portions of 2, the fourth plate portion 22-connected to the two side end portions opposed to each other and the bottom plate portion (configuration corresponding to the two bottom plate portions 22-2 before the division). 3 and the second structure 22 so as to pass through the center of the second through hole 22-5 and the fourth plate portion 22-3. It is constituted by 2 to 2 divides.

Screws 24 for fixing the pair of third members 23A, 23B to the pair of second members 22A, 2B are screwed into the screw holes 22-4.
The second through hole 22-5 is a through hole for accommodating the suspension bolt 3. When the length in the z direction of the pair of third members is 1, the length in the z direction of the pair of second members 22A and 22B can be set to be ½ or less, for example. .

Alternatively, the first member 21B may be used as the second member 22A, and the first member 21A may be used as the second member 22B. In other words, two first structures 21 may be prepared and one may be used as the second structure 22.
Thereby, since it is not necessary to manufacture the 1st structure 21 and the 2nd structure 22 made into the structure different from the 1st structure 21, the manufacturing process of the 1st anti-vibration member 18 is carried out. Can be simplified, and the members constituting the first vibration reducing member 18 can be easily managed.

  In addition, for example, the first structure 21 and the second structure 22 having different lengths in the z direction may be prepared to configure the first vibration reducing member 18.

  FIG. 9 is a plan view of the pair of third members shown in FIG. FIG. 10 is a side view of the third member shown in FIG. FIG. 11 is a side view of the pair of third members shown in FIG. 9 to 11, the same reference numerals are given to the same components.

  Referring to FIGS. 1, 2, and 9 to 11, the pair of third members 23 </ b> A and 23 </ b> B extends in the extending direction of the suspension bolt 3, and the second and fourth plate portions 21- 3, 22-3, the fifth plate portion 23-1, which is in contact with the suspension bolt 3, and extends in the direction in which the suspension bolt 3 extends, and is disposed so as to face the fifth plate portion 23-1. The sixth plate portion 23-2 in contact with the two structural bodies 21 and 22, the extending direction of the suspension bolt 3, and the first plate portion 21-1 and the second plate of the first member 21A. A seventh plate that contacts the third plate portion 22-1 of the member 22A, is connected to the fifth and sixth plate portions 23-1, 23-2, and is provided with a plurality of screw holes 23-5. Portion (a configuration corresponding to the two seventh plate portions 23-3 before the division), the extending direction of the suspension bolt 3, and the first plate portion 21-1 and the first plate portion 21-1 of the first member 21B. Two members 22 8th plate part (partition) which contacted the 3rd board part 22-1, and was connected with the 5th and 6th board parts 23-1, 23-2, and was provided with a plurality of screw holes 23-5. And a third structure 23 having a configuration corresponding to the previous two eighth plate portions 23-4), so as to pass through the first and second through holes 21-5 and 22-5. The seventh and eighth plate portions (configurations corresponding to the two seventh and eighth plate portions 23-3 and 23-4 before division) are divided into two.

In the state in which the first vibration reducing member 18 is attached to the suspension bolt 3, the plurality of screw holes 23-5 are formed from the plurality of screw holes 21-4 provided in the first and second structures 21 and 22, It arrange | positions so that either of 22-4 may be opposed.
While having such a configuration, the plurality of screws 24 are screwed into the screw holes 21-4 and 23-5 and the screw holes 22-4 and 23-5, so that the pair of the first and second members 21 are engaged. , 22 and the pair of third members 23 are fixed.

The third structure 23 including the pair of third members 23A and 23B has a hollow portion 23-6 in which an upper end and a lower end are open ends and the first and second structures 21 and 22 can be accommodated therein. It is a quadrangular columnar member having A part of the suspension bolt 3 communicates with the hollow portion 23-6.
The length in the z direction of the pair of third members 23A, 23B (third structure 23) can be appropriately set within a range of 800 mm to 1500 mm, for example.

  Referring to FIGS. 1 to 11, the first vibration reducing member 18 is formed by two first plate portions 21-1 and 21-3 in a state where the first vibration reducing member 18 is attached to the suspension bolt 3. And is formed of two corners extending in the extending direction of the suspension bolt 3, two third plate portions 22-1, and a fourth plate portion 22-3, and the extending direction of the suspension bolt 3 The two corners extending to the two are in contact with two adjacent corners formed inside the third structure 23.

  By having the first vibration reducing member 18 having such a configuration, the first vibration reducing member 18 attached to the suspension bolt 3 suppresses interference with ducts and other devices, and then in the x direction. And since it functions as a brace with respect to ay direction, the vibration of the suspension bolt 3 by an earthquake etc. can be reduced with the 2nd vibration reducing member 19 mentioned later.

  Further, the pair of first to third members 21A, 21B, 22A, 22B, 23A, and 23B constituting the first vibration reducing member 18 pass through the first and second through holes 21-5 and 22-5. Because it is composed of halves divided in half, it can be easily applied not only to the suspension bolt 3 to be newly constructed but also to the existing suspension bolt 3 that supports the equipment 6 it can.

  Further, the pair of first and second members 21A, 21B, 22A, 22B in the extending direction of the suspension bolt 3 is not lengthened, and the pair of third members 23A in the extending direction of the suspension bolt 3 is used. , 23B, the vibration of the suspension bolt 3 can be reduced even when the suspension bolt 3 is long (for example, when the suspension bolt 3 has a length of 1000 mm to 1800 mm). .

The 1st thru | or 3rd structures 21-23 set as the said structure are comprised with the metal thin plate. For this reason, in the state shown in FIG. 2, the two top plates 21-2 on the side not covered with the third member 23A are opened to the outside by hand, so that the first member 21A, 21B The groove | channel which guides the suspension bolt 3 to the 1 through-hole 21-5 can be formed easily.
Further, for the same reason, the second through hole is formed between the second members 22A and 22B by manually opening the two bottom plate portions 22-2 on the side not covered with the third member 23A. A groove for guiding the suspension bolt 3 to 22-5 can be easily formed.

  As a material of the first to third structures 21 to 23, for example, a metal, a resin, or the like can be used. In this case, the thicknesses of the first to third structures 21 to 23 can be appropriately set within a range of 1.2 mm or more, for example.

As shown in FIG. 2, the first vibration reducing member 18 described above is divided into two members at a stage (shipment stage) before being attached to the suspension bolt 3 shown in FIG. 1.
Specifically, in a stage (shipment stage) before being attached to the suspension bolt 3, the first vibration reducing member 18 includes a pair of first members 21A and 21B, a pair of second members 22A and 22B, The structure is divided into a third member 23A, a structure 25 composed of a plurality of screws 24, and the other third member 23B.

In the structure 25, the plurality of screws 24 are not completely fastened, and the plurality of screws 24 are temporarily fixed to the screw holes 21-4, 22-4, 23-5 (fastened halfway). State).
By shipping the first vibration reducing member 18 with such a configuration, the number of times of screwing at the site can be reduced (reduced in half), so that workability can be improved.

FIG. 12 is an enlarged side view of the first vibration reducing member attached to the suspension bolt. In FIG. 12, the same components as those shown in FIGS.
FIG. 13 is a side view of the first vibration reducing member shown in FIG. In FIG. 13, the same components as those of the structure shown in FIG.

Referring to FIGS. 12 and 13, the first vibration reducing member 18 includes the fixing member 2 in a state where the first plate portion 21-1 of the first structure 21 is sandwiched between the two dewashers 26. And the second vibration reducing member 19.
As a result, the upper end portion of the first vibration reducing member 18 is fixed to the suspension bolt 3. In addition, the lower end part of the 1st vibration-reduction member 18 is being fixed to the suspension bolt 3 with the position control member 20 mentioned later.

  FIG. 14 is a view showing an example of a second vibration-reducing member constituting the ceiling-suspended device with the vibration-reducing structure shown in FIG. 1, and FIG. 14 (A) is a side view partially showing a cross-section. (B) is a plan view and (C) is a bottom view.

  Referring to FIGS. 12 to 14, the second vibration reducing member 19 is attached to the suspension bolt 3 located inside the first vibration reducing member 18 attached to the suspension bolt 3. The second vibration-reducing member 19 is attached to the suspension bolt 3 that is positioned directly below the dewasher 26 that is positioned below, among the two dewashers 26.

  The second vibration-reducing member 19 extends the nut portion 12 that can be screwed onto the suspension bolt 3 and one side in the central axis direction of the nut portion 12 (one side in the thickness direction of the nut portion: the vertical direction in FIG. 14). A long nut type main body portion 15 formed of the cylindrical support portion 13 and a hooked cylindrical attenuation member 17 fitted to the support portion 13.

The outer shape of the nut portion 12 is formed in a polygonal shape in sectional view, for example, a hexagonal shape.
As an example, the main body portion 15 is manufactured by machining an inner surface of a long nut having a screw hole and scraping off a part of the inner peripheral surface of the screw hole in the length direction to form an insertion hole in which no screw portion is formed. The
A screw hole 12 a is formed inside the nut portion 12. An insertion hole 13a having a smooth inner peripheral surface that does not have a threaded portion is formed inside the support portion 13, and is configured such that the inner diameter of the insertion hole 13a is slightly larger than the inner diameter of the screw hole 12a. ing.
For this reason, on the inner peripheral side of the main body portion 15, a circumferential step portion 13 b is formed in a portion from the screw hole 12 a to the insertion hole 13 a.

  When the main body 15 is made of metal, it is easy to produce a commercially available metal long nut as described above, but the main body 15 may be integrally formed by resin molding or the like. . Moreover, you may form a screw hole and an insertion hole separately with respect to a metal pipe.

  FIG. 15 is a perspective view showing an example of the second vibration-reducing member shown in FIG. In FIG. 15, the same components as those of the structure shown in FIG.

Referring to FIG. 14 and FIG. 15, the second vibration reducing member 19 includes a cylindrical portion 17 a on the opening side of the support portion 13 and a flange portion 17 b formed on the one side opening portion of the main body portion 15. And a damping member 17 is mounted.
The damping member 17 is attached to the main body portion 15 by inserting the cylindrical portion 17a into the insertion hole 13a and bringing the flange portion 17b into close contact with the opening peripheral side of the insertion hole 13a. The damping member 17a has a function of reducing the vibration load acting on the suspension bolt 3.

The damping member 17 is, for example, a rubber hardness of 60 degrees or more (specifically, for example, about 60 to 90 degrees) according to durometer type A defined in JISK6253, and a loss coefficient (tan δ) at room temperature: 0. It is preferable to use five or more rubber-based or thermoplastic elastomer-based high damping materials.
As described above, the material of the damping member 17 is a rubber or elastomeric high damping material having a rubber hardness of 60 degrees or more and a loss coefficient (tan δ) of 0.5 or more. The suspension bolt 3 that vibrates with a small amplitude at a position near the ceiling can be effectively reduced.

In the case of a rubber-based high damping material, the rubber hardness is more preferably 70 degrees or more and 90 degrees or less. By using the damping member 17 made of the above-described rubber-based or thermoplastic elastomer-based high damping material, the vibration of the suspension bolt 3 can be efficiently damped.
When a rubber-based high damping material is used, it can be manufactured by molding a rubber-based damping material. On the other hand, when an elastomeric high damping material is used, it can be manufactured in large quantities at a low price by injection molding or the like.

It is preferable to color the surface of the attenuation member 17 or use a colored attenuation member 17. The color of the attenuation member 17 is preferably, for example, a color that stands out at a construction site where a ceiling suspension structure is applied.
Specifically, when the ceiling body F shown in FIG. 1 is a gray system mainly composed of concrete, the color of the attenuation member 17 is preferably white, red, green, or the like, which is a hue different from the gray system, for example. .
By coloring the attenuation member 17 with such a color, the operator can visually check the color of the flange portion 17b of the attenuation member 17 at the construction site. Thereby, an operator can confirm easily whether the installation of the attenuation member 17 is completed.

  When the suspension bolt 3 has a size of M10, the size of each part of the second vibration-reducing member 19 is, for example, the total length of the main body 15 is 30 mm, the maximum inner diameter of the screw hole 12a is 10 mm, the length of the nut 12 is 10 mm, The length of the insertion hole 13a can be set to 20 mm, the inner diameter of the insertion hole can be set to 14 mm, and the thickness of the cylindrical portion 17a and the flange portion 17b of the damping member 17 can be set to 2 mm.

  In the ceiling-suspended device 1 with a seismic-reducing structure shown in FIG. 1, when a ground vibration is applied to the equipment 6 due to the occurrence of an earthquake or the like, the vibration is transmitted to the entire ceiling-suspended device 1 with a seismic-reducing structure. Is suspended, the suspension bolt 3 is deformed.

Here, since the suspension bolt 3 projecting downward from the lower surface of the ceiling body F is surrounded by the damping member 17, the vibration of the suspension bolt 3 can be attenuated by the attenuation member 17 and a part of the vibration energy. Can be consumed.
Thereby, out of the total energy amount of vibration, the amount of vibration energy loaded on the suspension bolt 3 can be reduced by the amount consumed as described above.

When the equipment 6 is swung left and right due to the occurrence of an earthquake and the suspension bolt 3 is slightly deformed, the suspension bolt 3 is located at the lower end of the nut portion 12, that is, around Mainly contacts the step 13b.
That is, while the suspension bolt 3 is screwed into the screw hole 12a and the deformation in the horizontal direction is restricted, the suspension member 3 is surrounded by the attenuation member 17 in the inner portion of the insertion hole 13a and is deformed to deform the attenuation member 17. The bolt 3 can be bent.

  For this reason, the suspension bolt 3 is bent and deformed with a portion in contact with the circumferential step portion 13b as a fulcrum. When such bending deformation occurs, the cylindrical portion 17 a of the damping member 17 existing around the suspension bolt 3 reduces the vibration of the suspension bolt 3.

  Although the amount of fluctuation when the equipment 6 rolls due to a vibration such as an earthquake is large, the amount of fluctuation of the suspension bolt 3 at the position protruding from the ceiling body F is very small. For this reason, even if it is the damping member 17 of the above-mentioned thickness, it can show | play a seismic-reducing effect effectively.

On the other hand, when vibration such as an earthquake increases and the suspension bolt 3 is greatly deformed, the suspension bolt 3 mainly contacts the opening peripheral portion of the insertion hole 13a on the inner side of the second vibration reducing member 19. .
That is, when the suspension bolt 3 is bent and deformed with the lower end opening peripheral edge of the support portion 13 as a fulcrum, the cylindrical portion 17 a and the flange portion 17 b of the damping member 17 exist around the suspension bolt 3. Reduce the vibration.

As described above, when the deformation of the suspension bolt 3 is small and when the deformation of the suspension bolt 3 is large, the position where the suspension bolt 3 serves as a fulcrum of deflection inside the second vibration reducing member 19. Fluctuates.
Therefore, the fulcrum of the vibration of the suspension bolt 3 inside the second vibration reducing member 19 is not a single point but a plurality of points, and the stress concentration position with respect to the suspension bolt 3 can be shifted according to the magnitude of the vibration. .

  As a result, it is possible to effectively suppress bending deformation that occurs in the suspension bolt 3, and the equipment 6 can be supported stably without being excessively shaken. Moreover, the breakage of the suspension bolt 3 can be prevented, the equipment device 6 can be prevented from falling, and the equipment device 6 can be stably supported.

Further, in the first embodiment, the lower end of the first vibration reducing member 18 having a brace function surrounds the middle part of the ceiling bolt 3. For this reason, if the deformation | transformation of the ceiling suspending bolt 3 becomes large and the deformed ceiling suspending bolt 3 comes into contact with the inner periphery of the second through hole 22-5 of the first vibration reducing member 18, the first vibration reducing The ceiling suspension bolt 3 is deformed so as to deform the member 18.
For this reason, since it becomes possible to disperse the stress concentration position to the lower end position of the first vibration reducing member 18 in addition to the multiple points of stress concentration position on the second vibration reducing member 19 side, Can be obtained a seismic reduction effect.

  Note that the suspension support structure provided with the second seismic reduction member 19 even under the condition of applying approximately 500 Gal exceeding the acceleration of 400 Gal that is assumed to be applied to the building in an earthquake with a seismic intensity of 7 determined by the Japan Meteorological Agency If so, it can effectively reduce the vibration.

Referring to FIGS. 12 and 13, the position restricting member 20 includes two washers 20-1 and half nuts 20-2 and 20-3.
The two washers 20-1 are arranged so as to sandwich the bottom plate portion 22-2 constituting the first vibration reducing member 18.
The half nut 20-2 is attached to the suspension bolt 3 located inside the first vibration reducing member 18. The half nut 20-3 is attached to the suspension bolt 3 located outside the first vibration reducing member 18.
The half nuts 20-2 and 20-3 are fastened so as to sandwich the two washers 20-1, and the bottom plate portion 22-2 (the first plate 2) with respect to the suspension bolt 3 is interposed via the two washers 20-1. The position of the lower end of the first vibration reducing member 18 is regulated.

  In the first embodiment, as an example, the position restricting member 20 has been described as an example in which the position restricting member 20 includes two washers 20- and half nuts 20-2, 20-3. Any member that can regulate the position of the lower end of the vibration reducing member 18 from the inside and the outside of the first vibration reducing member 18 may be used, and the structure is not limited to that shown in FIGS. 12 and 13.

Here, with reference to FIGS. 1-13, the construction method of the seismic-reduction structure of 1st Embodiment which constructs the seismic-reduction structure 11 with respect to the newly installed suspension bolt 3 is demonstrated.
First, one third member 23A, a pair of first members 21A and 21B, and a pair of second members 22A and 22B are temporarily fixed with a plurality of screws 24 that are screwed halfway. The structure 25 and the other third member 23B are prepared.

Next, the two dewashers 26, the second vibration reducing member 19, and the position regulating member 20 are attached to all the suspension bolts 3 for constructing the vibration reducing structure 11 (member attaching step).
Thereafter, the operator manually opens the pair of first members 21A and 21B and the pair of second members 22A and 22B in the lateral direction (one in the y direction and the other in the -y direction), so that the first In addition, grooves for guiding the suspension bolt 3 to the first and second through holes 21-5 and 22-5 are formed in the second structures 21 and 22.

  The first and second plates provided on the structure 25 are arranged such that the top plate portion 21-2 is disposed between the two dewashers 26 and the bottom plate portion 22-2 is disposed between the two washers 20-1. The suspension bolt 3 is inserted into the two through holes 21-5 and 22-5 (suspending bolt insertion step).

Next, the position of the upper end of the first vibration-reducing member 18 with respect to the suspension bolt 3 is regulated using the second vibration-reducing member 19 so as to press the first vibration-reducing member 18 against the fixing member 2 (first movement). Position regulation process).
Then, the position of the lower end of the first vibration reducing member 18 with respect to the suspension bolt 3 is restricted using the position restricting member 20 (second position restricting step).

Next, the plurality of screws 24 are completely screwed together to completely fix the one third member 23A, the pair of first members 21A, 21B, and the pair of second members 22A, 22B. To do.
Then, by fixing the other third member 23B to the pair of first members 21A and 21B and the second members 22A and 22B constituting the structure 25 using a plurality of screws 24, Construction of the seismic reduction structure 11 for the newly installed suspension bolt 3 is completed.

Here, with reference to FIGS. 1-13, the construction method of the seismic-reduction structure of 1st Embodiment which constructs the seismic-reduction structure 11 with respect to the existing suspension bolt 3 is demonstrated.
First, one third member 23A, a pair of first members 21A and 21B, and a pair of second members 22A and 22B are temporarily fixed with a plurality of screws 24 that are screwed halfway. The structure 25 and the other third member 23B are prepared.

Next, two dewashers 26, a second vibration-reducing member 40 shown in FIG. 17 to be described later, and a position regulating member 20 are attached to all the suspension bolts 3 for constructing the vibration-reducing structure 11 (member attachment step). .
Thereafter, the operator manually opens the pair of first members 21A and 21B and the pair of second members 22A and 22B in the lateral direction (one in the y direction and the other in the -y direction (not shown)). Thus, grooves for guiding the suspension bolt 3 to the first and second through holes 21-5 and 22-5 are formed in the first and second structures 21 and 22.

  The first and second plates provided on the structure 25 are arranged such that the top plate portion 21-2 is disposed between the two dewashers 26 and the bottom plate portion 22-2 is disposed between the two washers 20-1. The suspension bolt 3 is inserted into the two through holes 21-5 and 22-5 (suspending bolt insertion step).

Next, the position of the upper end of the first vibration reducing member 18 with respect to the suspension bolt 3 is regulated by using the second vibration reducing member 40 so as to press the first vibration reducing member 18 against the fixing member 2 (the first vibration reducing member 18). Position regulation process).
Then, the position of the lower end of the first vibration reducing member 18 with respect to the suspension bolt 3 is restricted using the position restricting member 20 (second position restricting step).

Next, the plurality of screws 24 are completely screwed together to completely fix the one third member 23A, the pair of first members 21A, 21B, and the pair of second members 22A, 22B. To do.
Then, by fixing the other third member 23B to the pair of first members 21A and 21B and the second members 22A and 22B constituting the structure 25 using a plurality of screws 24, Construction of the seismic reduction structure 11 for the existing suspension bolt 3 is completed.

According to the vibration-reducing structure 11 of the first embodiment, the first vibration-reducing member 18 functions as a brace of the suspension bolt 3, so that interference with ducts and other devices is suppressed, and the second Together with the vibration reducing member 19, the vibration of the suspension bolt 3 due to an earthquake or the like can be reduced.
Further, the pair of first to third members 21A, 21B, 22A, 22B, 23A, and 23B constituting the first vibration reducing member 18 pass through the first and second through holes 21-5 and 22-5. Because it is composed of halves divided in half, it can be easily applied not only to the suspension bolt 3 to be newly constructed but also to the existing suspension bolt 3 that supports the equipment 6 it can.

  Furthermore, by lengthening only the length of the pair of third members 23A and 23B in the extending direction of the suspension bolt 3 (in other words, the pair of first and second members 21A and 21A in the extending direction of the suspension bolt 3 Even if the length of the suspension bolt 3 is long (for example, 1000 mm to 1800 mm) without increasing the lengths of 21B, 22A, and 22B, the vibration of the suspension bolt 3 can be reduced.

  Further, by using a plurality of screws 24 to fix the pair of third members 23A, 23B to the pair of first and second members 21A, 21B, 22A, 22B, a first reduction with respect to the suspension bolt 3 is achieved. The seismic member 18 can be easily attached and detached.

According to the construction method of the vibration-reduction structure of the first embodiment (method of constructing the vibration-reduction structure 11 on the new and existing suspension bolts 3), it is equivalent to the vibration-reduction structure 11 of the first embodiment. An effect can be obtained.
Moreover, according to the construction method of the vibration-reducing structure of the first embodiment, one third member 23A, a pair of first members 21A and 21B, and a pair of second members 22A and 22B, Is prepared in advance by a plurality of screws 24 (specifically, the structure 25 is prepared at a stage before going to the construction site). After mounting 25, a plurality of temporarily fixed screws 24 are completely screwed together, and another plurality of screws 24 are screwed together, so that a pair of first member and second member constituting the structure 25 21A, 21B, 23A, 23B and the other third member 23B can be fixed.
Thereby, the loss of the plurality of screws 24 can be suppressed, and the time required for screwing the plurality of screws 24 can be shortened (the construction time of the first vibration reducing member 18 can be shortened).

Here, with reference to FIG. 1 to FIG. 13, a vibration reducing structure according to a modified example of the first embodiment (hereinafter referred to as “a modified vibration reducing structure”) will be described.
The seismic attenuation structure according to the first modification is the seismic attenuation structure according to the first embodiment except that the first to third structures 21 to 23 are fixed by welding instead of the plurality of screws 24. 11 is configured.
In the vibration reducing structure of the modification, for example, a place corresponding to the arrangement position of the plurality of screws 24 can be welded.
As the welding method, for example, a spot welding method, a full circumference welding method, or the like can be used.

According to the vibration-reducing structure according to the modification of the first embodiment having the above-described configuration, the plurality of screws 24 are not necessary, so that the cost of the vibration-reducing structure can be reduced.
Moreover, the earthquake-reduction structure which concerns on the modification of 1st Embodiment can acquire the effect similar to the earthquake-reduction structure 11 of 1st Embodiment demonstrated previously.

  Note that welding and the screw 24 may be combined. Specifically, instead of using the plurality of screws 24, the structure 25 is formed using a welding method, and the other third member 23 </ b> B is fixed to the structure 25 with the plurality of screws 24. Good.

Next, the construction method of the seismic-reduction structure in the case of constructing the vibration-reduction structure of a modification with respect to the newly installed suspension bolt 3 is demonstrated.
The construction method of the vibration-reducing structure of the modified example with respect to the newly installed suspension bolt 3 excludes the step of completely screwing the plurality of screws 24 constituting the structure 25 described in the first embodiment, In place of the step of fixing the other third member 23B to the pair of first members 21A, 21B and second members 22A, 22B constituting the structure 25 using a plurality of screws 24, Except for having a welding step of welding the other third member 23B to the pair of first members 21A, 21B and second members 22A, 22B constituting the structure, the first embodiment. This can be done by the same method as the construction method of the seismic reduction structure described.

Next, the construction method of the seismic-reduction structure in the case of constructing the modified seismic-reduction structure with respect to the existing suspension bolt 3 is demonstrated.
The construction method of the vibration-reducing structure of the modification with respect to the existing suspension bolt 3 removes the process of completely screwing together the plurality of screws 24 constituting the structure 25 described in the first embodiment, and the plurality of screws. 24, instead of the step of fixing the other third member 23B to the pair of first members 21A, 21B and second members 22A, 22B constituting the structure 25, the structure is The reduction described in the first embodiment, except that the pair of first members 21A and 21B and the second members 22A and 22B are configured to weld the other third member 23B. It can be performed by the same method as the construction method of the seismic structure.

According to the construction method of the seismic attenuation structure of the modification of the first embodiment (method of constructing the vibration damping structure of the modification on the new and existing suspension bolts 3), a plurality of screws 24 are not required. The cost of the seismic reduction structure can be reduced. Further, the working time can be shortened as compared with the case where a plurality of screws 24 are used.
In addition, the construction method of the earthquake-reduction structure of the modification of 1st Embodiment can acquire the effect similar to the construction method of the earthquake-reduction structure of 1st Embodiment.

(Second Embodiment)
FIG. 16 is a side view of the second vibration-reducing member according to the second embodiment of the present invention. In FIG. 16, a part of the second vibration damping member 30 is shown in cross section. In FIG. 16, the same components as those of the structure shown in FIG.

With reference to FIG. 1, FIG. 14, and FIG. 16, the second embodiment applicable to the vibration-reducing structure 11 instead of the second vibration-reducing member 19 constituting the vibration-reducing structure 11 shown in FIG. The 2nd vibration-reduction member 30 which concerns on a form is demonstrated.
The second vibration reducing member 30 includes the nut portion 12 and the support portion 13 having the same structure as the second vibration reducing member 19 described in the first embodiment, and constitutes the second vibration reducing member 19. A damping member 21 is provided instead of the damping member 17.

The damping member 31 constituting the second vibration-reducing member 30 has a cylindrical portion 31a that can be inserted into the insertion hole 13a of the support portion 13, but does not have a collar portion and extends outward from the opening of the insertion hole 13a. It has a cylindrical protruding portion 31b in which the cylindrical portion 31a extends in the length direction.
The damping member 31 is preferably composed of a high damping material that is the material of the damping member 17 described in the first embodiment, for example. Moreover, it is preferable that the attenuation member 31 is colored.

The second vibration-reducing member 30 including the damping member 31 is used by being screwed to the suspension bolt 3 at a position close to the ceiling body F, similarly to the ceiling-suspended device 1 with the vibration-reducing structure shown in FIG. .
The second damping member 30 is screwed onto the suspension bolt 3 with the damping member 31 on the lower side and the nut portion 12 on the upper side, and the first damping member 18 attached to the suspension bolt 3 is mounted on the deck plate 4. By pressing on the side, it is possible to realize a seismic reduction structure for ceiling-mounted equipment.

According to the second vibration reducing member 30 of the second embodiment, the vibration of the suspension bolt 3 at the time of the earthquake can be reduced, and the equipment 6 can be stably supported without excessively shaking, and the equipment 6 can be dropped. The equipment 6 can be protected by prevention.
Further, whether or not the second vibration-reducing member 30 is attached to the suspension bolt 3 can be recognized and confirmed by the operator visually checking the colored cylindrical protruding portion 31b.

(Third embodiment)
FIG. 17: is a figure which shows the 2nd vibration-reduction member which concerns on the 3rd Embodiment of this invention, (A) is a side view of a 2nd vibration-reduction member, (B) is the 2nd It is a perspective view which shows typically the state where the cylindrical support part half which comprises a vibration-reduction member opened.

With reference to FIG. 1 and FIG. 17, a third embodiment of the third embodiment applicable to the vibration reducing structure 11 can be used instead of the second vibration reducing member 19 constituting the vibration reducing structure 11 shown in FIG. 1. The second vibration reducing member 40 will be described.
The second vibration reducing member 40 includes a high nut 42 and is configured by fitting a cylindrical damping member 41 to the high nut 42. The second vibration-reducing member 40 has two support part halves 41A. The two support half halves 41A are formed of, for example, a resin or metal half cylinder.

The damping member 41 includes an upper cylindrical portion 41a that can be fitted on the outside of the hexagonal high nut 42, and a lower cylindrical portion 41b that extends below the upper cylindrical portion 41a.
An upper hole 41c into which the lower side of the hexagonal high nut 42 can be fitted is provided in the inner center of the upper cylinder portion 41a, and the suspension bolt 3 is inserted into the inner center of the lower cylinder portion 41b. A possible lower hole 41d is arranged.

The upper cylinder part 41a and the lower cylinder part 41b connect the two support part halves 41A through a hinge part 41B so as to be freely opened and closed. A cylindrical damping member 43 is provided on the inner peripheral portion of the lower cylindrical portion 41b.
Further, an inward ring-shaped projection 41e is inserted on the inner peripheral surface of the boundary portion between the upper cylinder portion 41a and the lower cylinder portion 41b, and the projection 41e serves as a thread portion of the suspension bolt 3. It is prevented from slipping off.
Moreover, the locking piece 41f with a hole and the projection part 41g are attached to the opposite side to the hinge junction part of two support part half bodies 41A, and it is 2 by fitting the locking piece 41f and the projection part 41g. The two support portion halves 41A can be locked in a closed state in a cylindrical shape.

The damping member 43 is composed of a rubber-based or elastomer-based high-damping material having a rubber hardness of 60 degrees or more according to durometer type A defined in JIS K6253 and a loss factor (tan δ) at room temperature: 0.5 or more. It is preferable to do.
For example, the attenuation member 43 is preferably made of a high attenuation material similar to the attenuation member 17 described in the first embodiment, and is colored similarly to the attenuation member 17.
Moreover, it is preferable that coloring is given also to resin-made upper side cylinder part 41a and lower side cylinder part 41b.

The second vibration-reducing member 40 including the damping member 43 described above is screwed into a position near the ceiling body F of the suspension bolt 3 and used for vibration reduction.
With the damping member 43 on the lower side and the high nut 42 on the upper side, the high nut 42 is screwed onto the suspension bolt 3 located near the deck plate 4, thereby realizing a seismic reduction structure for the ceiling suspension device. .

  According to the second vibration reducing member 40 of the third embodiment, the vibration of the suspension bolt 3 at the time of the earthquake can be reduced, and the equipment 6 can be stably supported without excessively shaking, and the equipment 6 can be dropped. It is possible to prevent and protect the equipment 6.

Further, whether or not the second vibration damping member 40 is attached to the suspension bolt 3 is recognized by visually checking the colored cylindrical damping member 43 or the colored upper cylindrical portion 41a and the lower cylindrical portion 41b. can do.
Further, when the second vibration-reducing member 40 is attached to the suspension bolt 3, the two half-cylinder-type support half halves 41A can be opened and closed via the hinge part 41B. Since the half nut 41A is opened, it can be attached to the high nut 42 from the side of the suspension bolt 3, so that the second suspension member 19 or 30 is not provided with the existing suspension bolt 3 provided. And can be easily mounted.

(Fourth embodiment)
FIG. 18 is a cross-sectional view of a second vibration-reducing member according to the fourth embodiment of the present invention.
Referring to FIG. 18, the second vibration reduction of the fourth embodiment that can be applied to the vibration reduction structure 11 instead of the second vibration reduction member 19 constituting the vibration reduction structure 11 shown in FIG. 1. The member 50 will be described.

The second vibration reducing member 50 includes a main body portion 53 and a damping member 54. The main body 53 can be configured, for example, such that the inner cylinder 52 is inserted into the inner upper part of the outer cylinder 51 made of an outer shape quadrangular prism type steel material or hard resin.
The damping member 54 is a tubular member with a hook that is fitted to the lower side of the outer cylinder 51 in a standing state of the main body 53.

The inner cylinder 52 can be made of metal or hard resin, for example. A threaded portion 52 a is provided on the inner peripheral surface of the inner cylinder 52.
The length of the inner cylinder 52 is slightly shorter than the length of the outer cylinder 51. An insertion hole 51 a is formed in a portion where the inner cylinder 51 is not inserted on the lower side of the outer cylinder 51. A damping member 54 is fitted in the insertion hole 51a.

The damping member 54 includes a cylindrical portion 54a and a flange portion 54b, and the cylindrical portion 54a is fitted into the insertion hole 51a, and the flange portion 54b is fitted to the outer cylinder 51 so as to cover the lower end opening of the outer cylinder 51. ing.
The damping member 54 can be configured by a high damping material similar to the high damping material that is the material of the damping member 17 of the first embodiment, for example. Moreover, it is preferable that the attenuation member 54 is colored.

The second vibration-reducing member 50 including the damping member 54 is screwed to a position near the ceiling body F of the suspension bolt 3 as in the ceiling-suspended device 1 with the vibration-reducing structure shown in FIG. Used as.
With the damping member 54 on the lower side and the inner cylinder 52 on the upper side, the threaded portion 52a is screwed onto the portion of the suspension bolt 3 that is close to the deck plate 4, thereby realizing a seismic reduction structure for a ceiling suspension device.

  According to the second vibration reducing member 50 of the fourth embodiment, the vibration of the suspension bolt 3 at the time of the earthquake can be reduced, and the equipment 6 can be stably supported without excessively shaking, and the equipment 6 can be prevented from falling. It is possible to prevent and protect the equipment 6.

In the second vibration-reducing member 50 of the fourth embodiment, the inner cylinder 52 and the inner cylinder 52 are integrated by pushing the inner cylinder 52 having the threaded portion 52a into the outer cylinder 51 in advance, thereby integrating the main body. The part 53 can be configured.
Like the second vibration-reducing member 19 described in the first embodiment, if the threaded portion inside the commercially available long nut is partially machined and cut to form the insertion hole 17a, the manufacturing cost increases. . Therefore, when it is desired to further reduce the manufacturing cost, the second vibration reducing member 50 of the fourth embodiment is suitable.

In addition, the second vibration reducing member 50 is formed by fitting the main body 53 only by fitting the straight tubular outer cylinder 51 having no threaded portion and the inner cylinder 52 in which the threaded portion 52a is formed in advance. Since it can be manufactured, the manufacturing cost can be further reduced as compared with the second vibration damping member 19 described in the first embodiment.
Note that the outer cylinder 51 and the inner cylinder 52 may be integrally formed of resin, or both may be made of metal and integrated by means such as adhesion.

(Fifth embodiment)
FIG. 19 is a side view of the second vibration-reducing member according to the fifth embodiment of the present invention.
Referring to FIG. 19, the second vibration reduction of the fifth embodiment applicable to the vibration reduction structure 11 instead of the second vibration reduction member 19 constituting the vibration reduction structure 11 shown in FIG. 1. The member 60 will be described.

The second vibration damping member 60 includes a high nut 62 and is configured by fitting a cylindrical damping member 61 to the high nut 62. The damping member 61 includes an upper cylindrical portion 61a that can be fitted to the outside of the hexagonal high nut 62, and a lower cylindrical portion 61b that is tapered and extends below the upper cylindrical portion 61a. Have.
An upper hole 61c into which the lower side of the hexagonal high nut 62 can be fitted is formed in the inner center of the upper cylindrical portion 61a. A lower hole 61d through which the suspension bolt 3 can be inserted is formed in the center inside the lower cylinder portion 61b. A restraining member 65 made of a metal ring, a hard resin band, a ring, or the like is attached so as to surround the outer periphery of the upper cylindrical portion 61a.

The damping member 61, for example, has a rubber hardness of 60 degrees or more according to durometer type A as defined in JISK6253, and has a loss coefficient (tan δ) at room temperature: 0.5 or more. It may be composed of materials.
That is, the attenuation member 61 is preferably made of a high attenuation material similar to the attenuation member 17 described in the first embodiment, and is preferably colored.

The second vibration-reducing member 60 including the damping member 61 is screwed into a position near the ceiling body F of the suspension bolt 3 as in the ceiling-suspended device 1 with the vibration-reducing structure shown in FIG. Used as.
The damping structure of the ceiling suspension device can be realized by screwing the high nut 62 into the suspension bolt 3 close to the deck plate 4 with the damping member 61 on the lower side and the high nut 62 on the upper side.

According to the second vibration reducing member 60 of the fifth embodiment, the vibration of the suspension bolt 3 at the time of the earthquake can be reduced, and the equipment 6 can be stably supported without excessively shaking, and the equipment 6 can be dropped. The equipment 6 can be protected by prevention.
In the case where it is assumed that the strength of the damping member 61 is insufficient, the restraining member 65 restrains the outer peripheral portion of the upper tubular portion 61a and suppresses deformation of the upper tubular portion 61a due to vibration or deformation of the suspension bolt 3, The upper cylinder portion 61a is held so as not to fall off the high nut 62.
Further, whether or not the second vibration damping member 60 is attached to the suspension bolt 3 can be confirmed by visually confirming the colored attenuation member 61.

(Sixth embodiment)
FIG. 20 is a partial cross-sectional view of a second vibration damping member according to the sixth embodiment of the present invention.
Referring to FIG. 20, the second vibration reduction of the sixth embodiment applicable to the vibration reduction structure 11 instead of the second vibration reduction member 19 constituting the vibration reduction structure 11 shown in FIG. 1. The member 70 will be described.

The second vibration-reducing member 70 includes a high nut 72, a cylindrical damping member 71 is fitted to the high nut 72, and the periphery thereof is covered with a metal outer cylinder 73.
The damping member 71 includes an upper cylindrical portion 71a that can be fitted to the outside of the hexagonal high nut 72, and a lower cylindrical portion 71b that extends below the upper cylindrical portion 71a.
The outer cylinder 73 is a metal cylinder, and includes an upper peripheral wall 73a fitted to the high nut 72, an upper peripheral wall 73b surrounding the upper cylindrical part 71a, and a lower peripheral wall 73c surrounding the lower cylindrical part 71b. And having.

An upper hole 71c into which the lower side of the hexagonal high nut 72 can be fitted is provided in the upper center of the upper cylindrical portion 71a, and the suspension bolt 3 is inserted into the inner center of the lower cylindrical portion 71b. A possible lower hole 71d is arranged.
A fitting hole 73 d into which a hexagonal high nut 72 can be pushed and fitted is provided in the center of the upper end peripheral wall 73 a of the outer cylinder 73, and the outer cylinder 73 is fitted and integrated with the high nut 72. ing.

The damping member 71 is, for example, a rubber system having a rubber hardness of 60 degrees or more, for example, 60 to 90 degrees according to durometer type A as defined in JISK6253, and a loss coefficient (tan δ) at room temperature: 0.5 or more. Or it is preferable to comprise with an elastomer type high attenuation material.
That is, it is preferable that the attenuation member 71 is made of a high attenuation material similar to the attenuation member 17 described above. Moreover, it is preferable that the attenuation member 71 is colored. Furthermore, the outer cylinder 73 is also preferably colored.

The second vibration reducing member 70 is screwed into a position near the ceiling body F of the suspension bolt 3 and used for vibration reduction.
With the damping member 71 on the lower side and the high nut 72 on the upper side, the high nut 72 is screwed into a portion of the suspension bolt 3 close to the deck plate 4, thereby realizing a seismic reduction structure for the ceiling suspension device.

According to the second vibration reducing member 70 of the sixth embodiment, the vibration of the suspension bolt 3 at the time of the earthquake can be reduced, and the equipment 6 can be stably supported without excessively shaking, and the equipment 6 can be prevented from falling. The equipment 6 can be protected by prevention.
In addition, the outer cylinder 73 restrains the outer peripheral part of the upper cylinder part 71a and the lower cylinder part 71b, suppresses the deformation of the upper cylinder part 71a due to vibration or deformation of the suspension bolt 3, and the upper cylinder part 71a is a high nut. 72 so that it does not fall off.
Further, whether or not the second vibration damping member 70 is attached to the suspension bolt 3 can be determined by visually confirming the colored damping member 71 and the outer cylinder 73.

(Seventh embodiment)
FIG. 21: is a fragmentary sectional view which shows the ceiling-suspended apparatus with a vibration-reduction structure provided with the vibration-reduction structure which concerns on the 7th Embodiment of this invention. In FIG. 21, the same components as those of the structure shown in FIG.

  Referring to FIG. 21, a ceiling suspension device 75 with a vibration reducing structure according to the seventh embodiment has a structure in which the equipment 6 is suspended and supported by a suspension bolt 3 suspended from the ceiling body F. The structure described in the first embodiment is the structure in which the second vibration-reducing member 19 is attached to the part where the suspension bolt 3 protrudes from F, and the first vibration-reducing member 18 is provided along the suspension bolt 3. Is the same.

The ceiling-suspended device 75 with a vibration-reducing structure is characterized in that a spring hanger 81 having a coil spring 80 built in is provided at a portion where the suspension bolt 3 supports the facility device 6.
The spring hanger 81 includes a vertically long rectangular plate-like main body wall 82 that extends vertically along the side surface of the equipment 6, and an upper support plate that is horizontally connected to the upper and lower ends of the main body wall 82. 83 and a lower support plate 84.

The upper support plate 83 is connected so that the lower end portion of the suspension bolt 3 penetrates up and down, a coil spring 80 is wound around the lower end side of the suspension bolt 3, and a washer 85 and a nut 86 are attached to the lower end of the suspension bolt 3. Thus, the coil spring 80 is prevented from coming off.
The lower support plate 84 is provided along a support piece 6 a attached to the side surface of the equipment 6, a bolt 87 passing through the lower support plate 84 and the support piece 6 a, and nuts 88 and 89 screwed to the bolt 87. And integrated with the support piece 6a.

According to the ceiling-suspended device 75 with the vibration-reducing structure of the seventh embodiment, the ceiling-suspended structure is formed in the same manner as the structure of the first embodiment due to the presence of the first and second vibration-reducing members 18 and 19. It has a seismic reduction effect.
In addition, since the equipment 6 is suspended from the suspension bolt 3 via the spring hanger 81, when the earthquake vibration is about to act on the equipment 6, the elasticity of the coil spring 80 is used to reduce the equipment. It is possible to shake.
As a result, the seismic action of the second seismic reduction member 19, the brace structure effect of the first seismic reduction member 18, and the seismic action of the spring hanger 81 are used for the earthquake that acts on the equipment 6. Vibration can be suppressed.

(Eighth embodiment)
FIG. 22 is a perspective view of the first vibration reducing member according to the eighth embodiment of the present invention, schematically showing the first vibration reducing member at the stage (shipment stage) before being attached to the suspension bolt. It is. In FIG. 22, as an example, the case where the third members 23 </ b> A and 23 </ b> B and the upper member 93 and the lower member 95 are fixed using a plurality of screws 24 is illustrated as an example.

Referring to FIG. 22, the first vibration reducing member 90 of the eighth embodiment includes the first and second structures 21 constituting the first vibration reducing member 18 described in the first embodiment, The structure is the same as that of the first vibration reducing member 18 except that the upper member 93 and the lower member 95 are provided instead of the upper member 93.
Thereby, the structure 91 constituting the first vibration reducing member 90 includes the third member 23A, the upper member 93, and the lower member 95.
In the structure 91, the plurality of screws 24 are firmly fastened to the third member 23A, the upper member 93, and the lower member 95 to the end.

The upper member 93 integrates the pair of first members 21A and 21B described in the first embodiment, and replaces the first through hole 21-5 with the first suspension bolt insertion groove 93-. The structure is the same as that of the first structure 21 except that the structure 3 is included.
The first suspension bolt insertion groove 93-3 is a first through hole shown in FIG. 2 from the outer edge of the top plate portion 93-2 where the first and second plate portions 21-1 and 93-1 are not provided. 21-5 is provided on the top plate portion 93-2 so as to extend to the formation position.
A suspension bolt is disposed in the back of the first suspension bolt insertion groove 93-3 (the position where the first through hole 21-5 is formed).
The 2nd board part 93-1 is set as the structure which united two 2nd board parts 21-3 shown in FIG.

The lower member 95 integrates the pair of second members 22A and 22B described in the first embodiment, and replaces the second through hole 22-5 with a second suspension bolt insertion groove 95-. The structure is the same as that of the second structural body 22 except that the third structural body 22 is provided.
2nd through-hole 22 shown in FIG. 2 from the outer edge of the baseplate part 95-2 in which the 3rd and 4th board parts 22-1, 95-1 are not provided. It is provided on the bottom plate portion 95-2 so as to extend to the formation position of -5.
A suspension bolt is disposed in the back of the second suspension bolt insertion groove 95-3 (position where the second through hole 22-5 is formed).
The 4th board part 95-1 is set as the structure which united two 4th board parts 22-3 shown in FIG.

According to the first vibration reducing member 90 according to the eighth embodiment having the above-described configuration, the pair of first members 21A and 21B and the pair of second members 22A and 22B described above (FIG. 2). By providing the upper member 93 and the lower member 95 instead of the reference), the number of parts of the first vibration reducing member 90 can be reduced.
Further, by having the first and second suspension bolt insertion grooves 93-3 and 95-3, even when the first vibration reducing member 90 is attached to the existing bolt, the upper member 93 and the lower member 95 Since it is possible to easily arrange the bolts, it is possible to easily construct the existing bolts.
The first vibration reducing member 90 of the eighth embodiment can obtain the same effect as the first vibration reducing member 18 of the first embodiment described above.

When the above-described first vibration reducing member 90 is used to form a vibration reducing structure (not shown), for example, the vibration reducing structure includes, for example, the first vibration reducing member 90 and the second vibration reducing member. The seismic member 19 (see FIGS. 12 to 14) and the position regulating member 20 (see FIGS. 12 and 13) can be used.
In the following description, the seismic reduction structure having such a configuration is referred to as a vibration reduction structure of the eighth embodiment.

In FIG. 22, as an example, the case where the third members 23 </ b> A and 23 </ b> B and the upper member 93 and the lower member 95 are fixed using a plurality of screws 24 is described as an example. Instead of using the plurality of screws 24, for example, the third members 23A, 23B, the upper member 93, and the lower member 95 are welded at locations corresponding to the arrangement positions of the plurality of screws 24. It may be fixed.
As the welding method, for example, a spot welding method, a full circumference welding method, or the like can be used.

  Thus, instead of the plurality of screws 24, by fixing the third members 23A and 23B and the upper member 93 and the lower member 95 by welding, the plurality of screws 24 are not necessary. The cost 90 of the vibration-reducing structure can be reduced.

  Further, welding and the screw 24 may be combined. Specifically, instead of using the plurality of screws 24, the structure 91 is formed using a welding method, and the other third member 23 </ b> B is fixed to the structure 91 with the plurality of screws 24. Good.

Next, referring to FIGS. 1, 12, 13, and 22, the vibration damping structure of the eighth embodiment is applied to the newly installed suspension bolt 3 or the existing suspension bolt 3. The construction method of the seismic reduction structure in the case of construction is explained.
First, the third member, the upper member 93, and the lower member 95 so that the second and fourth plate portions 93-1, 95-1 and the third member 23A are in contact with each other. Are prepared and the other third member 23B is prepared (preparation step).

Next, the second vibration-reducing member 19 (the second vibration-reducing member 40 (FIG. 17) is used when constructing the existing suspension bolt 3) and the position regulating member 20 are attached to the suspension bolt 3 (members). Installation process).
Next, the suspension bolt 3 is inserted into the first and second suspension bolt insertion grooves 93-3 and 95-3 provided in the structure 91, and the suspension bolt 3 is inserted into the first and second suspension bolt insertion grooves 93. -3, placed in the back of 95-3 (hanging bolt insertion process).

Next, a structure for the suspension bolt 3 using the second vibration-reducing member 19 (or the second vibration-reducing member 40 when applied to the existing suspension bolt 3) so as to press the structure 91 against the fixing member 2. The position of the upper end of the body 91 is regulated (first position regulating process).
Next, the position of the lower end of the structure 91 with respect to the suspension bolt 3 is regulated using the position regulating member 20 (second position regulating step).
Next, the other third member 23B is welded to the upper member 93 and the lower member 95 constituting the structure 91 (welding process).
Thereby, the construction of the vibration-reducing structure according to the eighth embodiment is completed.

According to the construction method of the vibration-reducing structure according to the eighth embodiment, even when constructing the existing suspension bolt 3, the first and second suspension bolt insertion grooves 93-3 and 95-3 can be easily provided. Since the suspension bolt 3 can be guided, the construction can be easily performed.
In addition, the construction method of the earthquake-reduction structure of 8th Embodiment can acquire the effect similar to the construction method of the earthquake-reduction structure 11 of 1st Embodiment.

In addition, in the construction method of the seismic-reduction structure body of 8th Embodiment, although the case where welding was used was mentioned as an example, it replaced with welding and may use the some screw | thread 24. FIG.
In this case, in the preparation step, instead of the welded structure 91, the third member 23 </ b> A, the upper member 93, and the lower member 95 are fixed by the plurality of screws 24. In place of the welding process, the other third member 23B is fixed to the upper member 93 and the lower member 95 constituting the structure 91 using a plurality of screws.

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to such specific embodiments, and various modifications can be made within the scope of the gist of the present invention described in the claims. Deformation / change is possible.
For example, in the first to eighth embodiments described above, the case where the outer shape of the first vibration reducing member 18 is a quadrangular prism has been described as an example, but the outer shape of the first vibration reducing member 18 is, for example, A cylinder or a polygonal column other than a square column may be used.

  The present invention provides a structure for supporting a facility device in a ceiling so that the vibration of the suspension bolt that supports the facility device is reduced, thereby reducing the vibration that can stably support the facility device even when subjected to a shake such as an earthquake. It can be applied to construction methods for structures and seismic reduction structures.

  DESCRIPTION OF SYMBOLS 1,75 ... Ceiling equipment with a vibration-reducing structure, 2 ... Fixing member, 3 ... Suspension bolt, 4 ... Deck plate, 4A ... Groove, 5 ... Connection tool, 5a ... Lower support piece, 5b ... Extension piece, 5c ... Upper support piece 6 ... Equipment, 6a ... Support piece, 8 ... Bolt, 9 ... Nut, 11 ... Anti-seismic structure, 12 ... Nut part, 12a ... Screw hole, 13 ... Support part, 13a, 51a ... Insertion hole , 13b ... circumferential step, 15 ... main body, 17, 31, 41, 54, 61, 71 ... damping member, 17a, 54a ... cylindrical, 17b, 54b ... collar, 18, 90 ... first vibration reduction Member, 19, 30, 40, 50, 60 ... second vibration reducing member, 20 ... position regulating member, 20-1 ... washer, 20-2, 20-3 ... half nut, 21 ... first structure , 21A, 21B ... first member, 21-1 ... first plate portion, 21-2, 93-2 ... top plate portion, 21 3, 93-1 ... second plate portion, 21-4, 22-4, 23-5 ... screw hole, 21-5 ... first through hole, 22 ... second structure, 22A, 22B ... first 2 members, 22-1 ... third plate portion, 22-2, 95-2 ... bottom plate portion, 22-3, 95-1 ... fourth plate portion, 22-5 ... second through hole, 23 ... 3rd structure, 23A, 23B ... 3rd member, 23-1 ... 5th board part, 23-2 ... 6th board part, 23-3 ... 7th board part, 23-4 ... Eighth plate portion, 23-6 ... hollow portion, 24 ... screw, 25, 91 ... structure, 26 ... dewasher, 31a ... cylindrical portion, 31b ... projecting portion, 41a, 61a, 71a ... upper cylindrical portion, 41b, 61b, 71b ... lower cylinder part, 41c ... upper hole, 41d ... lower hole, 41e ... locking piece, 41f ... projection part, 41A ... half support part, 42, 62, 72 ... high nut, 51, DESCRIPTION OF SYMBOLS 3 ... Outer cylinder, 52 ... Inner cylinder 52a ... Screw part 53 ... Main body part, 65 ... Restraining member, 73c ... Lower peripheral wall, 73d ... Fitting hole, 80 ... Coil spring, 81 ... Spring hanger, 82 ... Main body wall part, 83 ... Upper support plate, 84 ... Lower support plate, 85 ... Washer, 86, 88, 89 ... Nut, 93 ... Upper member, 93-3 ... First suspension bolt insertion groove, 95 ... Lower member, 95- 3 ... second suspension bolt insertion groove, F ... ceiling frame

Claims (14)

A seismic structure that is provided on a plurality of suspension bolts that are suspended from the ceiling and supported on a ceiling by fixing the upper end to a fixing member installed in the ceiling,
A first vibration-reducing member that is provided in each of the plurality of suspension bolts positioned below the fixing member, has a hollow portion that communicates with a part of the suspension bolt, and reduces vibration of the suspension bolt. When,
A second damping member that is disposed within the first damping member, presses the first damping member against the fixed member, and reduces vibration of the suspension bolt;
A position regulating member for regulating the position of the lower end of the first vibration reducing member with respect to the suspension bolt;
Including
The first vibration reducing member includes a pair of first members, a pair of second members, the pair of first members, and a pair of third members that house the pair of second members. And having
The pair of first members are opposed to each other, extend in a surface direction perpendicular to the extending direction of the suspension bolt, two first plate portions extending in the extending direction of the suspension bolt, A rectangular top plate portion connected to the upper ends of the two first plate portions and having a first through-hole through which the suspension bolt passes, and four side ends of the two first plate portions A first structure having two side walls disposed opposite to each other and a second plate connected to the top plate, the center of the first through hole, and the first The first structure is divided into two parts so as to pass through the two plate portions,
The pair of second members are opposed to each other, extend in a surface direction perpendicular to the extending direction of the suspension bolt, two third plate portions extending in the extending direction of the suspension bolt, A rectangular bottom plate portion connected to the lower ends of the two third plate portions and having a second through hole through which the suspension bolt passes, and four side end portions of the two third plate portions A second structure having two side end portions opposed to each other and a fourth plate portion connected to the bottom plate portion, a center of the second through hole, and the second The second structure body is divided into two parts so as to pass through the four plate parts,
The pair of third members constitute a third structure body, which is a quadrangular columnar member having the hollow portion that houses the first and second structure bodies in which the upper end and the lower end are open ends. And
The pair of third members extends in the extending direction of the suspension bolt, and extends in the extending direction of the suspension bolt, and a fifth plate portion that contacts the second and fourth plate portions. And a sixth plate portion arranged to face the fifth plate portion and in contact with the first and second structures, and extending in the extending direction of the suspension bolt, A seventh plate portion that is in contact with the first and third plate portions and connected to the fifth and sixth plate portions, and extends in the direction in which the suspension bolt extends; And the third plate having the eighth plate connected to the fifth and sixth plates and passing through the first and second through holes. As described above, the seventh and eighth plate portions are divided into two parts,
Two corners formed by the two first plate portions and the second plate portion and extending in the extending direction of the suspension bolt, the two third plate portions, and the fourth plate And two corners formed in the plate portion and extending in the extending direction of the suspension bolt are in contact with two adjacent corner portions formed inside the third structure. An anti-seismic structure characterized by The first vibration reducing member includes an upper member and a lower member instead of the pair of first members and the pair of second members,
The upper member is a member in which the pair of first members are integrated, and instead of the first through hole, the top plate portion in which the first and second plate portions are not provided. Having a first suspension bolt insertion groove provided in the top plate portion so as to extend from an outer edge to a position where the first through hole is formed, and into which the suspension bolt is inserted;
The lower member is a member in which the pair of second members are integrated, and instead of the second through hole, an outer edge of the bottom plate portion where the third and fourth plate portions are not provided. 2. The reduction according to claim 1, further comprising: a second suspension bolt insertion groove that is provided in the bottom plate portion so as to extend to a position where the second through hole is formed and into which the suspension bolt is inserted. Seismic structure.   2. The vibration-reducing structure according to claim 1, wherein the pair of third members are fixed to the pair of first members and the pair of second members by welding.   2. The vibration reducing structure according to claim 1, wherein the pair of third members are fixed to the pair of first members and the pair of second members with a plurality of screws. body.   The vibration-reducing structure according to claim 2, wherein the pair of third members are fixed to the upper member and the lower member by welding.   The vibration-reducing structure according to claim 2, wherein the pair of third members are fixed to the upper member and the lower member with a plurality of screws. The second vibration reducing member includes a nut portion to which the suspension bolt is screwed,
A cylindrical support portion provided so as to extend from the nut portion in the direction of the central axis of the nut portion, and through which the suspension bolt can be inserted;
A cylindrical damping member that is inserted into the support portion and surrounds the suspension bolt,
In the support portion, the inner diameter of the insertion hole through which the suspension bolt is inserted is configured to be larger than the inner diameter of the screw hole of the nut portion,
7. The material of the damping member is a rubber or elastomer type high damping material having a rubber hardness of 60 degrees or more and a loss coefficient (tan δ) of 0.5 or more. A seismic-reduction structure according to any one of the preceding claims. The second vibration damping member includes a high nut to which the suspension bolt is screwed,
An upper insertion hole into which the lower side of the high nut can be fitted, and a cylindrical damping member that is continuous with the upper insertion hole and has a lower insertion hole into which the suspension bolt can be inserted.
7. The material of the damping member is a rubber or elastomer type high damping material having a rubber hardness of 60 degrees or more and a loss coefficient (tan δ) of 0.5 or more. A seismic-reduction structure according to any one of the preceding claims. The second vibration damping member includes a high nut to which the suspension bolt is screwed,
In the upper part, a resin cylindrical support attached to the high nut so as to surround the high nut;
A damping member disposed at a lower portion inside the support portion;
Including
The resin-made cylindrical support part is formed into two halves, and the other half is hinge-joined so as to be openable and closable with respect to one of the halves. Item 7. The vibration-reducing structure according to any one of Items 1 to 6. A construction method of a seismic reduction structure for constructing the seismic reduction structure according to any one of claims 1, 3, 4, 7 to 9 for the newly installed suspension bolt,
A preparation step of preparing one of the third members, the pair of first members, and the pair of second members, and the other third member; ,
A member attaching step for attaching the second vibration reducing member and the position regulating member to the suspension bolt;
A suspension bolt insertion step of inserting the suspension bolt into the first and second through holes provided in the structure;
A first position regulating step for regulating the position of the upper end of the structure relative to the suspension bolt using the second vibration reducing member so as to press the first vibration reducing member against the fixing member;
A second position regulating step for regulating the position of the lower end of the structure relative to the suspension bolt using the position regulating member;
A welding step of welding the other third member to the pair of first and second members constituting the structure;
A method for constructing a seismic reduction structure characterized by comprising: A construction method of a seismic reduction structure for constructing the seismic reduction structure according to any one of claims 1, 3, 4, and 7 to 9 for the existing suspension bolt,
A preparation step of preparing one of the third members, the pair of first members, and the pair of second members, and the other third member; ,
A member attaching step for attaching the second vibration reducing member and the position regulating member to the suspension bolt;
By opening the pair of first and second members constituting the structure in the lateral direction, a groove for guiding the suspension bolt is formed in the first and second through holes, and the groove passes through the grooves. A suspension bolt insertion step of inserting the suspension bolt into the first and second through holes,
A first position regulating step for regulating the position of the upper end of the structure relative to the suspension bolt using the second vibration reducing member so as to press the first vibration reducing member against the fixing member;
A second position regulating step for regulating the position of the lower end of the structure relative to the suspension bolt using the position regulating member;
A welding step of welding the other third member to the pair of first member and the second member constituting the structure;
A method for constructing a seismic reduction structure characterized by comprising: In the preparation step, instead of the welded structure, the one third member, the pair of first members, and the pair of second members are screwed to the middle. Prepare a structure temporarily fixed with screws,
After the suspension bolt insertion step, the one third member, the pair of first members, and the pair of second members are completely engaged by completely screwing the plurality of screws. Fixing, and
Instead of the welding step, using a plurality of screws, fixing the other third member to the pair of first member and the second member constituting the structure;
The construction method of the seismic-reduction structure of Claim 10 or 11 characterized by the above-mentioned. It is a construction method of the seismic reduction structure for constructing the seismic reduction structure according to any one of claims 2, 5, 6 to 9 for newly installed or existing suspension bolts,
A structure in which the third member, the upper member, and the lower member are welded so that the second and fourth plate portions are in contact with the third member. And a preparation step of preparing the other third member,
A member attaching step for attaching the second vibration reducing member and the position regulating member to the suspension bolt;
Suspension bolt insertion in which the suspension bolt is inserted into the first and second suspension bolt insertion grooves provided in the structure, and the suspension bolt is disposed at the back of the first and second suspension bolt insertion grooves. Process,
A first position regulating step for regulating the position of the upper end of the first vibration reducing member relative to the suspension bolt using the second vibration reducing member so as to press the structure against the fixing member;
A second position regulating step for regulating the position of the lower end of the structure relative to the suspension bolt using the position regulating member;
A welding step of welding the other third member to the upper member and the lower member constituting the structure;
A method for constructing a seismic reduction structure characterized by comprising: In the preparation step, instead of the welded structure, a structure in which the one third member, the upper member, and the lower member are fixed with a plurality of screws is prepared.
Instead of the welding step, using a plurality of screws, fixing the other third member to the upper member and the lower member constituting the structure; and
The construction method of the seismic-reduction structure of Claim 13 characterized by the above-mentioned.

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