JP6732456B2 - Damping structure and construction method of damping structure - Google Patents

Description

The present invention, in a structure for suspending and supporting facility equipment, reduces the vibration of a suspension bolt that supports the facility equipment so that the facility equipment can be stably supported even when shaken by an earthquake or the like. The present invention relates to a construction method of a structure and a seismic reduction structure.

2. Description of the Related Art Conventionally, various types of equipment such as air conditioners, lighting equipment, air conditioning ducts, and various pipes are installed in buildings such as condominiums and buildings. These equipments are supported by the ceiling suspension structure.
FIG. 23 is a perspective view showing an example of a conventional ceiling suspension structure.
Referring to FIG. 23, a conventional ceiling suspension structure 100 suspends four suspension bolts 104 from the ceiling structure 101 via an insert 102 mounted so as to be embedded in the ceiling structure 101, and suspends each suspension bolt 104. The bottom of the equipment W is supported by the connecting metal fitting 103 provided at the lower end of the.
The ceiling-mounted structure 100 having such a structure largely rolls when a vibration such as an earthquake acts, and the hanging bolt 104 repeatedly bends greatly.

FIG. 24 is a diagram schematically showing a deformed state of the suspension bolt when an earthquake shakes the ceiling suspension structure shown in FIG. 23.
Specifically, as shown in FIG. 24, when an earthquake shakes and a force F due to acceleration acts on the equipment W, bending deformation acts on the hanging bolt 104 (in the figure). See suspension bolt 104, shown in phantom.)

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

Note that in recent years, depending on the structure of a building, the length of the hanging bolt 104 arranged 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.

Further, when the connecting bolt 103 is bent or twisted due to the bending deformation of the hanging bolt 104, the bolted portion between the connecting bolt 103 and the hanging bolt 104 is loosened, and the connecting bolt 103 may fall off. ..

Further, the greater the vibration of the earthquake, the greater the influence thereof, which may lead to the fall of the equipment W depending on a large-scale earthquake. For example, during the huge earthquake that occurred in the Tohoku region in March 2011, a large number of equipment devices W were dropped, and at present, further measures for strengthening the ceiling suspension structure are required.
As an example of the conventional measures for strengthening the ceiling suspension structure, there is a brace shown in FIG.

FIG. 25: is a side view which shows an example of the reinforcement of the ceiling suspension structure by the conventional brace.
Referring to FIG. 25, in an example of conventional reinforcement of a ceiling suspension structure by a brace 110, a structure in which two braces 110 are bridged in a cross shape so as to connect two hanging bolts 109 arranged opposite to each other. I am using.
In addition, one end of the brace 110 is fixed to the hanging bolt 109 located near the ceiling slab via the connecting fitting 111, and the other end is located near the lower end of the hanging bolt 109 via the connecting fitting 112. It is fixed.

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

JP, 2013-212510, A

By the way, when a duct or another device is disposed in the space above the equipment 106, the brace 110 may not be installed on the suspension bolt 109.
Further, even if the brace 110 is installed, the brace 110 is installed while avoiding interference with the duct and other devices. Therefore, the brace 110 is installed at an appropriate position of the suspension bolt 109 (a position where the brace 110 is most effective). ), it becomes difficult to install the suspension bolt 104 in the above position, and the suspension bolt 104 cannot be sufficiently reinforced.
In particular, when the hanging bolt 104 has a long length (for example, 1000 mm to 1800 mm), the above problem becomes remarkable.

Further, as a vibration damping structure for damping the vibration of the hanging bolt 104 in the event of an earthquake, not only the newly installed hanging bolt 104 but also the already installed hanging bolt 104 (existing hanging bolt 104) can be easily used. What can be installed and is capable of obtaining a sufficient seismic reduction effect even when applied to the hanging bolt 104 having a long length (for example, 1000 mm to 1800 mm) is desired.

Therefore, the present invention, while suppressing the interference with ducts and other equipment, can be easily installed not only on newly installed suspension bolts, but also on existing suspension bolts supporting facility equipment, and An object of the present invention is to provide a vibration damping structure capable of damping the vibration of a long suspension bolt and a method of constructing the vibration damping structure.

In order to solve the above problems, according to one aspect of the present invention, a fixing member provided in a ceiling is fixed at an upper end, so that the plurality of ceiling members are suspended from the ceiling to support the equipment. A vibration-damping structure provided on a hanging bolt, comprising a hollow portion provided on each of the plurality of hanging bolts located below the fixing member, the hollow bolt having a part of the hanging bolt communicating with the hanging bolt. A first damping member for damping the vibration of the bolt, and a first damping member disposed inside the first damping member, for pressing the first damping member against the fixing member, and damping the vibration of the hanging bolt. A second damping member, and a position regulating member that regulates the position of the lower end of the first damping member with respect to the suspension bolt, wherein the first damping member is a pair of first members. And a pair of second members, a pair of the first members, and a pair of third members that accommodate the pair of second members, the pair of first members, Two first plate portions that are arranged to face each other and that extend in the extending direction of the hanging bolt and a first plate portion that extends in a plane direction orthogonal to the extending direction of the hanging bolt It is connected to the upper end, and a top plate portion of square the hanging bolts in the center has a first through-hole penetrating, of the four side walls of the two first plate portions of oppositely disposed 2 A first structure having two side wall portions and a second plate portion connected to the top plate portion so as to pass through the center of the first through hole and the second plate portion. , The first structure is divided into two, and the pair of second members are arranged to face each other, and two third plate portions extending in the extending direction of the hanging bolt. , A quadrangle having a second through hole extending in a plane direction orthogonal to the extending direction of the hanging bolt, connected to the lower ends of the two third plate portions, and having a second through hole in the center through which the hanging bolt penetrates A bottom plate part and, out of the four side end parts of the two third plate parts, two side end parts that are arranged opposite to each other, and a fourth plate part that is connected to the bottom plate part. The second structure is divided into two so as to pass through the center of the second through hole and the fourth plate portion, and the second structure is divided into two. The upper end and the lower end are open ends, and the third structure is a square columnar member having the hollow portion that accommodates the first and second structures therein. The pair of third members extends in the extending direction of the suspension bolt and includes a fifth plate portion that is in contact with the second and fourth plate portions, and the suspension member. A sixth plate portion extending in the extending direction of the bolt and arranged to face the fifth plate portion and in contact with the first and second structures; and an extending direction of the hanging bolt And a seventh plate part that is in contact with one of the first and third plate parts and is connected to the fifth and sixth plate parts, and extends in the extending direction of the hanging bolt. The third structure having an eighth plate portion that is in contact with the other first and third plate portions and is connected to the fifth and sixth plate portions, And the second and third through-holes are divided into two so as to pass through the second through-hole, and the two first and second plate portions are formed. Two corners that are formed and extend in the extending direction of the hanging bolt, and are formed of the two third plate portions and the fourth plate portion, and extend in the extending direction of the hanging bolt. There is provided a seismic damping structure characterized in that the two corner portions that are formed are in contact with two adjacent corner portions that are formed inside the third structure body.

According to the vibration damping structure of one aspect of the present invention, since the first vibration damping member having the above-described configuration is provided on the suspension bolt, the first vibration damping member functions as a brace for the suspension bolt. In addition to suppressing the interference with the duct and other devices, the vibration of the suspension bolt due to an earthquake or the like can be damped together with the second vibration damping member.
In addition, a pair of first to third members constituting the first vibration damping member is divided into two halves so as to pass through the first and second through holes (through holes in which hanging bolts are arranged). Since it is composed of split members, it can be easily applied not only to newly installed 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 hanging bolt (in other words, increasing the length of the pair of first and second members in the extending direction of the hanging bolt. Even if the length of the hanging bolt is long (for example, when the length of the hanging bolt is about 1000 mm to 1800 mm), the vibration of the hanging bolt can be reduced.

Further, in the vibration damping structure, the first vibration damping member includes an upper member and a lower member in place of the pair of first members and the pair of second members, and The upper member is a member in which the pair of first members are integrated, and instead of the first through hole, an outer edge of the top plate portion not provided with the first and second plate portions. To the formation position of the first through hole to the top plate portion, and has a first hanging bolt insertion groove into which the hanging bolt is inserted, the lower member is A member obtained by integrating the pair of second members, instead of the second through hole, from the outer edge of the bottom plate portion not provided with the third and fourth plate portions to the second You may have a 2nd hanging bolt insertion groove provided in the said bottom plate part so that it may extend to the formation position of a through hole, and in which the said hanging bolt is inserted.

As described above, in place of the pair of first members and the pair of second members, the upper member including the first hanging bolt insertion groove and the lower member including the second hanging bolt insertion groove are provided. As a result, the number of parts of the first vibration damping member can be reduced.
Further, by having the first and second hanging bolt insertion grooves, it is possible to easily arrange the bolts in the upper member and the lower member even when the first vibration damping member is attached to the existing bolt. Therefore, the existing bolt can be easily installed.

Moreover, in the above-mentioned vibration damping 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 way, by fixing the pair of third members to the pair of first and second members by welding, the pair of third members, the pair of first members, and the pair of second members are separated. Since a plurality of screws for fixing are unnecessary, it is possible to reduce the number of parts of the first vibration damping member. As a result, the cost of the seismic damping structure including the first seismic damping member and the number of construction man-hours at the site can be reduced.

Further, in the 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.

As described above, the pair of third members may be fixed to the pair of first and second members by using a plurality of screws instead of welding. When a plurality of screws are used, the first vibration damping member can be easily attached to and detached from the suspension bolt, as compared with the case of welding.

Further, in the vibration damping structure, the pair of third members may be fixed to the upper member and the lower member by welding.

In this way, 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 member and the upper member and the lower member to each other is unnecessary. Therefore, it is possible to reduce the number of parts of the first vibration damping member. Thereby, the cost of the damping structure including the second damping member and the number of construction man-hours on site can be reduced.

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

In this way, instead of welding, a plurality of screws may be used to fix the pair of third members to the upper member and the lower member. When a plurality of screws are used, the first vibration damping member can be easily attached to and detached from the suspension bolt, as compared with the case of welding.

Further, in the vibration damping structure, the second vibration damping member is provided so as to extend from the nut portion in a central axis direction of the nut portion and the nut portion to which the suspension bolt is screwed, An insertion hole through which the suspension bolt is inserted, including a tubular support portion into which the suspension bolt can be inserted, and a tubular damping member which is inserted into the support portion and surrounds the suspension bolt. Has a larger inner diameter than the inner diameter of the screw hole of the nut portion, and the damping member is made of a rubber-based or elastomer-based material having a rubber hardness of 60 degrees or more and a loss coefficient (tan δ) of 0.5 or more. It may be a damping material.

In this way, by having the second damping member including the 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 facility equipment vibrates due to an earthquake or the like, the vibration is transmitted to the entire seismic damping structure, and the first seismic damping member withstands vibrations due to its brace function. Moment stress concentrates.
At this time, the damping member included in the second damping member provided on the suspension bolt consumes vibration energy from the outside by damping or absorbing the vibration energy.
As described above, by using a rubber or elastomer 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 can be obtained. It is possible to efficiently reduce the vibration of a suspension bolt that vibrates with a small amplitude at a nearby position.

As a result, the amount of vibration energy that acts on the suspension bolt in the total amount of vibration energy is consumed, and the vibration load on the suspension bolt is reduced, so that the vibration of the equipment and the suspension bolt can be reduced.
As a result, in addition to the effect of the first damping member, the effect of suppressing the vibration of the damping member is added, the occurrence of breakage or deformation of the suspension bolt can be suppressed, and the equipment can be stably suspended from the ceiling. ..
Furthermore, since the second damping member for obtaining the damping effect is installed near the ceiling of the suspension bolt, a special installation space is almost unnecessary, so pipes and other equipment are installed around the equipment. Can be installed easily even when

Further, in the vibration damping structure, the second vibration damping member includes a high nut with which the suspension bolt is screwed, an upper insertion hole through which a lower side of the high nut can be fitted, and the upper insertion hole. And a tubular damping member having a lower insertion hole through which the hanging 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. It may be a rubber-based or elastomer-based high damping material of 5 or more.

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, It is possible to efficiently reduce the vibration of a suspension bolt that vibrates with a small amplitude at a position.

Further, in the above-described vibration damping structure, the second vibration damping member is made of a resin that is mounted on the high nut to which the suspension bolt is screwed, and at the upper portion so as to surround the high nut. The resin-made tubular support portion includes two tubular halves, and a tubular support portion and a damping member disposed in a lower portion inside the support portion. On the other hand, the other half body may be hinged so as to be openable and closable.

With such a configuration, the second damping member can be attached to the suspension bolt from the side of the suspension bolt. Accordingly, the second damping member can be easily attached to the existing hanging bolt that supports the equipment.

According to the damping structure of another aspect of the present invention, the damping structure according to any one of claims 1, 3 and 4 is installed on the newly installed suspension bolt. A method of constructing a seismic reduction structure, comprising a structure in which the one third member, the pair of first members, and the pair of second members are welded together, and the other of the third members. No. 3 member is prepared, a member attaching step of attaching the second damping member and the position regulating member to the suspension bolt, and the first and second portions provided in the structure. The hanging bolt inserting step of inserting the hanging bolt into the through hole of the step, and the structure for the hanging bolt using the second damping member so as to press the first damping member against the fixing member. A first position restricting step of restricting the position of the upper end of the body; a second position restricting step of restricting the position of the lower end of the structure with respect to the hanging bolt by using the position restricting member; A method of constructing a seismic reduction structure, comprising: a welding step of welding the other third member to the pair of first and second members constituting the other member.

According to the vibration damping 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 at the construction site, with respect to the pair of the first member and the second member forming the structure, the other first member Since it is only necessary to weld the members of No. 3, the first damping member can be easily attached to the suspension bolt. That is, it is possible to shorten the construction time of the first seismic damping member on site.

According to another aspect of the present invention, there is provided a method for constructing a seismic reduction structure for constructing the seismic reduction structure according to any one of claims 1, 3 and 4 to the existing hanging bolt. Then, the structure in which the one third member, the pair of first members, and the pair of second members are welded together, and the other third member are prepared. A preparing step, a member attaching step of attaching the second vibration damping member and the position regulating member to the suspension bolt, and a pair of the first and second members forming the structure are opened in the lateral direction. Thus, a groove for guiding the hanging bolt is formed in the first and second through holes, and the hanging bolt is inserted through the groove to insert the hanging bolt into the first and second through holes. And a first position regulating step of regulating the position of the upper end of the structure with respect to the suspension bolt by using the second damping member so as to press the first damping member against the fixing member. And a second position regulating step of regulating the position of the lower end of the structure with respect to the hanging bolt using the position regulating member, the pair of first members and the second member constituting the structure. A method of constructing a seismic damping structure, comprising: a welding step of welding the other third member to a member.

According to the method for constructing a seismic reduction structure of another aspect of the present invention, a structure is prepared by welding one third member, a pair of first members, and a pair of second members. By doing so, the pair of first and second members exposed from the one third member can be expanded in the lateral direction, and the hanging bolt can be easily inserted from the side of the hanging bolt into the first and second through holes. It becomes possible to store it, and the first vibration damping member can be easily attached to the suspension bolt. That is, it is possible to shorten the construction time of the first seismic damping member on site.

In the method for constructing a seismic reduction structure, in the preparing step, the one third member, the pair of first members, and the pair of second members are replaced with the welded structure. By preparing a structure that is temporarily fixed with a plurality of screws that are screwed halfway and completely screwing the plurality of screws after the hanging bolt insertion step, the third member of the one , The step of completely fixing the pair of first members and the pair of second members, and the welding step, in place of the plurality of screws, the pair of the members forming the structure. The step of 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 of the third members, the pair of first members, and the pair of second members are screwed to the middle by screws, The pair of first and second members exposed from the third member can be laterally expanded to easily accommodate the hanging bolt in the first and second through holes from the side of the hanging bolt. Become. Thereby, the first vibration damping member can be easily attached to the suspension bolt. That is, it is possible to shorten the construction time of the first seismic damping member on site.

According to the method for constructing a vibration damping structure of another aspect of the present invention, the method according to any one of claims 2, 5, 6 to 9 with respect to the newly installed or existing suspension bolt. A method for constructing a damping structure for constructing a damping structure, comprising: the third member of one side so that the second and fourth plate portions come into contact with the third member of one side. A preparatory 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 damping member, and A member attaching step of attaching the position restricting member, and inserting the suspension bolt into the first and second suspension bolt insertion grooves provided in the structure, and attaching the suspension bolt to the first and second suspension bolts. A suspending bolt inserting step of arranging in the back of the bolt inserting groove and an upper end of the first damping member with respect to the hanging bolt by using the second damping member so as to press the structure against the fixing member. Position regulating step for regulating the position of the structure, a second position regulating step for regulating the position of the lower end of the structure with respect to the hanging bolt by using the position regulating member, and the structure forming the structure. A method for constructing a seismic reduction structure, comprising: a welding step of welding the other third member to the upper member and the lower member.

According to the method for constructing a seismic reduction structure of another aspect of the present invention, since the structure has the first and second hanging bolt insertion grooves, the newly installed hanging bolt or the existing hanging bolt can be used. However, the same method can be used for easy construction.

In the method for constructing a seismic reduction structure according to another aspect, in the preparing step, the one third member, the upper member and the lower member are replaced with the welded structure. Prepare a structure fixed with a plurality of screws, in place of the welding process, using a plurality of screws, for the upper member and the lower member constituting the structure, the other of the first The step of fixing the member of No. 3 may be included.

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

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

It is a fragmentary sectional view showing the ceiling suspension equipment with a damping structure provided with the damping structure concerning a 1st embodiment of the present invention. It is a perspective view of the 1st seismic damping member of the stage (shipment stage) before attaching to a suspension bolt. FIG. 3 is a plan view of a pair of first members shown in FIG. 2. It is the side view which looked at the 1st member shown in FIG. 3 from A. FIG. It is the side view which looked at a pair of 1st members shown in Drawing 3 from B. FIG. 3 is a plan view of a pair of second members shown in FIG. 2. It is the side view which looked at 2nd member shown in FIG. 6 from C. FIG. 7 is a side view of the pair of second members shown in FIG. 6 viewed from D. 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. 9 from E. It is the side view which looked at G of the pair of 3rd members shown in FIG. It is the side view which expanded the 1st seismic damping member attached to the suspension bolt. It is the side view which looked at the 1st seismic damping member shown in FIG. 12 from H. It is a figure which shows an example of the 2nd seismic damping member which comprises the ceiling suspension apparatus with a seismic damping structure shown in FIG. 1, (A) is a side view which illustrated a part by cross section, (B) is a plane FIG. 3C is a bottom view. It is a perspective view which shows an example of the 2nd damping member shown in FIG. It is a side view of the 2nd damping member which concerns on the 2nd Embodiment of this invention. It is a figure which shows the 2nd damping member which concerns on the 3rd Embodiment of this invention, (A) is a side view of a 2nd damping member, (B) shows a 2nd damping member. It is a perspective view which shows typically the state which the cylindrical supporting-part half body which comprises comprises. It is sectional drawing of the 2nd seismic damping member which concerns on the 4th Embodiment of this invention. It is a side view of the 2nd damping member which concerns on the 5th Embodiment of this invention. It is a partial cross section figure of the 2nd seismic damping member which concerns on the 6th Embodiment of this invention. It is a partial cross section figure which shows the ceiling suspension equipment with a damping structure provided with the damping structure which concerns on the 7th Embodiment of this invention. It is a perspective view of the 1st seismic damping member which concerns on the 8th Embodiment of this invention, Comprising: It is a figure which shows the 1st seismic damping 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 suspension structure. It is a figure which shows typically the deformation state of the suspension 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 by the conventional brace.

Hereinafter, embodiments to which the present invention is applied will be described in detail with reference to the drawings. It should be noted that the drawings used in the following description are for explaining the configuration of the embodiment of the present invention, and the sizes, thicknesses, dimensions, etc. of the respective parts shown in the drawings are the actual ceiling-mounted equipment 1 with a seismic damping structure. It may be different from the dimensional relationship of.

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

The lower end of each of the four suspension bolts 3 is provided with a connector 5, and the equipment 6 is suspended and supported via the connector 5.
A deck plate 4 is provided at the bottom of the ceiling body F. Therefore, each suspension bolt 3 penetrates the deck plate 4 and is suspended.

Examples of the facility equipment 6 include various installation equipment 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, a storage portion for pipes and cables, and the like. In FIG. 1, as an example, an indoor unit of a room air conditioner having a rectangular box shape is illustrated.

In the following description, when it is necessary to describe 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. The direction orthogonal to the groove of the plate 4 (groove width direction: the lateral direction of the equipment 6) is defined as the y direction, and the vertical direction (height direction of the equipment 6) is defined as the z direction.

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

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

Further, when the equipment 6 is a structure having a small width such as a small-scale pipe or wiring, one suspension bolt 3 suspended on the pipe or wiring is provided in plural in the length direction of the pipe or wiring. It will be laid out and suspended. Further, it is needless to say that the structure of the present application can be applied to the equipment which can be supported by one hanging bolt 3.

Two sets of support pieces 6a are formed to project in the horizontal direction (y direction or -y direction) on the lower portions of both side surfaces of the box-type equipment 6, and these support pieces 6a form a connecting tool 5 such as an S-shaped metal fitting. It is connected to the lower end portion of each hanging bolt 3 via.
The connecting tool 5 includes a lower support piece 5a horizontally stacked on the support piece 6a and connected to the support piece 6a by a bolt 8 and a nut 9, and an extending piece 5b standing upright to the lower support piece 5a. And an upper support piece 5c that is horizontally extended from the upper end of the extension piece 5b, penetrates the hanging bolt 3, and is connected to the hanging bolt 3 by a nut 10 screwed to the hanging bolt 3.

In the hanging bolt 3, a seismic reduction structure 11 is provided in a portion that projects downward from the lower surface of the ceiling driving body F (the lower surface of the deck plate 4).
The vibration damping structure 11 includes a first vibration damping member 18, a second vibration damping member 19, and a position restriction member 20.

FIG. 2 is a perspective view of the first vibration damping member at a stage (shipping stage) before being attached to the suspension bolt. In addition, although FIG. 2 illustrates a state in which the other third member 23B is not fixed to the structure 25 with the screw 24, when the first vibration damping member 18 is fixed to the suspension bolt 3. For example, a plurality of screws 24 are used to fix the other third member 23B to the structure 25.

Referring to FIG. 2, the first vibration damping 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 of.

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 reference numerals are given to the same components.

1 to 5, the pair of first members 21A and 21B are arranged to face each other, extend in the extending direction (z direction) of the hanging bolt 3, and have a plurality of screw holes 21-4. The two first plate portions 21-1 provided and extending in the plane direction (the plane direction passing through the x direction and the y direction) orthogonal to the extending direction of the hanging bolt 3 A rectangular top plate portion that is connected to the upper end of the portion 21-1 and has a first through hole 21-5 through which the hanging bolt 3 penetrates in the center (a configuration corresponding to two top plate portions 21-2 before division). ) and, of the four side walls of the two first plate portion 21-1, configuration corresponding to two of the top plate portion 21-2 of the front face arranged two sidewall portions and the top plate portion (divided ) And a second plate portion (a configuration corresponding to the two second plate portions 21-3 before division) connected to the first structure body 21 having the first through hole 21-5. The first structure 25 is divided into two parts so as to pass through the center and the second plate part (a structure corresponding to the two second plate parts 21-3 before being divided).

A screw 24 for fixing the pair of third members 23A and 23B to the pair of first members 21A and 21B is screwed into the screw hole 21-4. The first through hole 21-5 is a through hole for housing the hanging 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, for example, 1/2 or less. ..

FIG. 6 is a plan view of the 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 to 8, the same components are designated by the same reference numerals.

1, FIG. 2, and FIG. 6 to FIG. 8, the pair of second members 22A and 22B are arranged to face each other, extend in the extending direction of the hanging bolt 3, and have a plurality of screw holes 22−. Four third plate portions 22-1 provided with 4 and extending in a surface direction orthogonal to the extending direction of the hanging bolt 3, and connected to the lower ends of the two third plate portions 22-1, Also, a rectangular bottom plate portion having a second through hole 22-5 through which the hanging bolt 3 penetrates (a configuration corresponding to the two bottom plate portions 22-2 before division) and two third plate portions 22- Of the four side end portions of No. 2, two side end portions arranged opposite to each other, and a fourth plate portion 22-connected to the bottom plate portion (configuration corresponding to the two bottom plate portions 22-2 before division) Dividing the 2nd structure 22 into 2 so that the 2nd structure 22 which has 3 may pass the center of the 2nd through-hole 22-5, and the 4th board part 22-3. It is composed of.

A screw 24 for fixing the pair of third members 23A and 23B to the pair of second members 22A and 2B is screwed into the screw hole 22-4.
The second through hole 22-5 is a through hole for housing the hanging 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, for example, 1/2 or less. ..

Further, 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 first structure 21 and the second structure 22 having a configuration different from the first structure 21, the manufacturing process of the first seismic damping member 18 Can be simplified, and the members constituting the first vibration damping member 18 can be easily managed.

Note that, 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 damping 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 viewed from the direction G. 9 to 11, the same components are designated by the same reference numerals.

1, FIG. 2, and FIG. 9 to FIG. 11, the pair of third members 23A, 23B extend in the extending direction of the hanging bolt 3, and the second and fourth plate portions 21- The fifth plate portion 23-1 that is in contact with the third and the second plate 22-3, and the suspension plate 3 are arranged so as to extend in the extending direction of the hanging bolt 3 and face the fifth plate portion 23-1. The second plate 21-2 of the first member 21A, which extends in the extending direction of the hanging bolt 3 and the sixth plate portion 23-2 that is in contact with the second structure body 21 and 22. A seventh plate that is in contact with the third plate part 22-1 of the member 22A, is connected to the fifth and sixth plate parts 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 division) and the extending direction of the hanging bolt 3, and the first plate portion 21-1 and the first plate portion 21-1 of the first member 21B. The second member 22B, which is in contact with the third plate portion 22-1, is connected to the fifth and sixth plate portions 23-1 and 23-2, and is provided with a plurality of screw holes 23-5. A third structure 23 having a plate portion (a configuration corresponding to the two eighth plate portions 23-4 before division) is passed through the first and second through holes 21-5 and 22-5. As described above, the seventh and eighth plate portions (configurations corresponding to the two seventh and eighth plate portions 23-3 and 23-4 before being divided) are divided into two.

In the state where the first vibration damping member 18 is attached to the suspension bolt 3, the plurality of screw holes 23-5 are the screw holes 21-4 provided in the first and second structures 21 and 22. It is arranged so as to face any one of 22-4.
With 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, thereby making a pair of the first and second members 21. , 22 and the pair of third members 23 are fixed.

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

With reference to FIGS. 1 to 11, in a state where the first vibration damping member 18 is attached to the suspension bolt 3, it is formed by two first plate portions 21-1 and second plate portions 21-3. Is formed of two corner portions extending in the extending direction of the hanging bolt 3 and two third plate portions 22-1 and 22-3, and the extending direction of the hanging bolt 3 And two corner portions extending to the abutting portion are in contact with two adjacent corner portions formed inside the third structure 23.

By having the 1st seismic damping member 18 made into such a structure, the 1st seismic damping member 18 attached to the suspension bolt 3 suppresses interference with a duct or another apparatus, and is also x direction. And, since it functions as a brace in the y direction, it is possible to reduce the vibration of the suspension bolt 3 due to an earthquake or the like together with the second vibration reducing member 19 described later.

Further, the pair of first to third members 21A, 21B, 22A, 22B, 23A, 23B forming the first vibration damping member 18 pass through the first and second through holes 21-5, 22-5. Since it is composed of a half body that is divided into two parts, it can be easily applied not only to the newly installed suspension bolt 3 but also to the existing suspension bolt 3 that supports the equipment 6. it can.

Further, the pair of third members 23A in the extending direction of the hanging bolt 3 are made long without increasing the length of the pair of first and second members 21A, 21B, 22A, 22B in the extending direction of the hanging bolt 3. , 23B, it is possible to reduce the vibration of the suspension bolt 3 even when the suspension bolt 3 is long (for example, when the length of the suspension bolt 3 is 1000 mm to 1800 mm). ..

The 1st thru|or 3rd structure 21-23 which was the said structure is comprised with the thin plates made from a metal. Therefore, in the state shown in FIG. 2, by manually opening the two top plate portions 21-2 on the side not covered by the third member 23A to the outside, the first member 21A and the first member 21B are connected to each other between the first member 21A and the first member 21B. A groove for guiding the suspension bolt 3 can be easily formed in the through hole 21-5 of No. 1.
Further, for the same reason, by manually opening the two bottom plate portions 22-2 on the side not covered by the third member 23A, the second through hole is formed between the second members 22A and 22B. A groove for guiding the hanging bolt 3 can be easily formed in 22-5.

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

As shown in FIG. 2, the above-described first vibration damping member 18 is divided into two members at a stage (shipping stage) before being attached to the suspension bolt 3 shown in FIG.
Specifically, at the stage (shipping stage) before being attached to the suspension bolt 3, the first vibration damping member 18 includes a pair of first members 21A and 21B, a pair of second members 22A and 22B, and one of It is divided into a structure 25 composed of a third member 23A and 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 fastened to the screw holes 21-4, 22-4, and 23-5 (fastened halfway). State).
By shipping the first vibration damping member 18 with such a configuration, it is possible to reduce the number of times screwing is performed in the field (reduced to half), so that workability can be improved.

FIG. 12 is an enlarged side view of the first vibration damping member attached to the suspension bolt. 12, the same components as those in the structures shown in FIGS. 1 to 11 are designated by the same reference numerals.
FIG. 13 is a side view of the first seismic damping member shown in FIG. 13, the same components as those of the structure shown in FIG. 12 are designated by the same reference numerals.

With reference to FIG. 12 and FIG. 13, the first vibration damping 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 damping member 19 are fixed.
Thereby, the upper end portion of the first vibration damping member 18 is fixed to the suspension bolt 3. The lower end portion of the first vibration damping member 18 is fixed to the suspension bolt 3 by a position regulating member 20 described later.

FIG. 14: is a figure which shows an example of the 2nd damping member which comprises the ceiling-mounted apparatus with a damping structure shown in FIG. 1, (A) is a side view which showed a part in section, B) is a plan view and (C) is a bottom view.

With reference to FIGS. 12 to 14, the second damping member 19 is attached to the hanging bolt 3 located inside the first damping member 18 attached to the hanging bolt 3. The second vibration damping member 19 is attached to the suspension bolt 3 located directly below the deca washer 26 located below the deca washer 26.

The second vibration damping member 19 extends the nut portion 12 that can be screwed into 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). It has a long nut type main body portion 15 composed of the tubular support portion 13 thus formed, and a flanged tubular damping member 17 fitted to the support portion 13.

The outer shape of the nut portion 12 is polygonal in cross section, for example, hexagonal.
The main body portion 15 is produced, for example, by processing the 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 the screw portion is not formed. It
A screw hole 12 a is formed inside the nut portion 12. An insertion hole 13a having a smooth inner peripheral surface having no 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 peripheral step portion 13b is formed in a portion from the screw hole 12a to the insertion hole 13a.

When the main body 15 is made of metal, it is easy to manufacture a commercially available long nut made of metal as described above, but the main body 15 may be integrally formed by resin molding or the like. .. Further, the screw hole and the insertion hole may be separately formed in the metal pipe.

FIG. 15 is a perspective view showing an example of the second vibration damping member shown in FIG. 14. 15, the same components as those of the structure shown in FIG. 14 are designated by the same reference numerals.

Referring to FIGS. 14 and 15, in the main body portion 15, the second seismic damping member 19 includes a tubular portion 17a on the opening side of the support portion 13 and a collar portion 17b formed on one side opening portion thereof. And a damping member 17 including
The damping member 17 is attached to the main body 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 edge 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 has, for example, a rubber hardness of 60 degrees or more (specifically, for example, about 60 to 90 degrees) according to the durometer type A specified in JIS K6253, and a loss coefficient (tan δ) at room temperature: 0. It is preferable to use a rubber-based or thermoplastic elastomer-based high damping material of 5 or more.
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 17, the suspension bolt 3 It is possible to efficiently reduce the vibration of the hanging bolt 3 vibrating with a small amplitude at a position near the ceiling.

Further, in the case of a rubber-based high damping material, it is more preferable that the rubber hardness is 70 degrees or more and 90 degrees or less. By using the damping member 17 made of the rubber-based or thermoplastic elastomer-based high damping material described above, 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 elastomer-based high damping material is used, it can be mass-produced at low cost by injection molding or the like.

The surface of the damping member 17 is preferably colored, or the colored damping member 17 is preferably used. The color of the attenuating 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 driving body F shown in FIG. 1 is a grayish type mainly composed of concrete, the color of the damping member 17 is, for example, white, red, green or the like which is a hue different from the grayish type. ..
By coloring the damping member 17 with such a color, the worker can visually confirm the color of the collar portion 17b of the damping member 17 at the construction site. Thereby, the operator can easily confirm whether or not the installation of the damping member 17 is completed.

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

In the ceiling suspension device 1 with a seismic reduction structure shown in FIG. 1, when a vibration is externally applied to the equipment device 6 due to an earthquake or the like, the vibration is transmitted to the entire suspension device 1 with a seismic reduction structure, and the equipment device 6 The hanging bolt 3 is deformed by swinging.

Here, since the suspension bolt 3 protruding downward from the lower surface of the ceiling driving body F is surrounded by the damping member 17, the damping member 17 can damp the vibration of the suspension bolt 3 and a part of the vibration energy. Can be consumed.
This makes it possible to reduce the amount of vibration energy loaded on the suspension bolt 3 in the total amount of vibration energy by the amount consumed as described above.

When the equipment 6 is swayed to the left or 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 portion of the nut portion 12, that is, at the periphery of the second damping member 19. It mainly contacts the stepped portion 13b.
That is, while the suspension bolt 3 is screwed into the screw hole 12a and is restrained from being deformed in the horizontal direction, the suspension member 3 is surrounded by the damping member 17 inside the insertion hole 13a so that the damping member 17 is deformed to suspend the suspension. The bolt 3 is capable of bending.

Therefore, the hanging bolt 3 is flexibly deformed with the portion in contact with the circumferential step portion 13b as a fulcrum. When such bending deformation occurs, the tubular portion 17a of the damping member 17 existing around the suspension bolt 3 reduces the vibration of the suspension bolt 3.

The amount of fluctuation when the equipment 6 rolls laterally due to a vibration such as an earthquake is large, but the amount of fluctuation of the suspension bolt 3 at the position protruding from the ceiling driving body F is very small. Therefore, even the above-described thick damping member 17 can effectively reduce the vibration.

On the other hand, when the vibration such as an earthquake becomes large and the suspension bolt 3 is largely deformed, the suspension bolt 3 mainly contacts the opening peripheral portion of the insertion hole 13a on the inner side of the second vibration damping member 19. ..
That is, when the suspension bolt 3 is flexibly deformed around the lower end opening peripheral edge portion of the support portion 13, the cylindrical portion 17 a and the flange portion 17 b of the damping member 17 are present around the suspension bolt 3, and these are these. Reduce the vibration.

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

As a result, it is possible to effectively suppress the bending deformation of the suspension bolt 3, and it is possible to stably support the equipment 6 without excessively shaking it. Further, it is possible to prevent the suspension bolt 3 from breaking, prevent the facility device 6 from falling, and stably support the facility device 6.

Further, in the first embodiment, the lower end of the first seismic damping member 18 having the brace function surrounds the midway portion of the ceiling suspension bolt 3. For this reason, when the deformation of the ceiling suspension bolt 3 becomes large and the deformed ceiling suspension bolt 3 comes into contact with the inner circumference of the second through hole 22-5 of the first vibration damping member 18, the first vibration damping The ceiling suspension bolt 3 is deformed so as to deform the member 18.
Therefore, in addition to the stress concentration positions at a plurality of points on the side of the second vibration damping member 19, it is possible to disperse the stress concentration positions at the lower end position of the first vibration damping member 18. It is possible to obtain a seismic reduction effect.

Even under the condition of applying about 500 Gal, which exceeds the acceleration of 400 Gal that is assumed to be applied to the building in an earthquake of seismic intensity 7 defined by the Japan Meteorological Agency, the ceiling suspension support structure provided with the second damping member 19 is provided. If so, it is possible to effectively reduce the earthquake.

12 and 13, the position regulating member 20 has 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 forming the first vibration damping member 18.
The half nut 20-2 is attached to the suspension bolt 3 located inside the first vibration damping member 18. The half nut 20-3 is attached to the suspension bolt 3 located outside the first vibration damping member 18.
Then, the half nuts 20-2, 20-3 are fastened so as to sandwich the two washers 20-1, and the bottom plate portion 22-2 (the first bolt) for the hanging bolt 3 is inserted via the two washers 20-1. The position of the lower end of the seismic damping member 18) is regulated.

In addition, in the first embodiment, as an example, the case where the position regulating member 20 is configured with the two washers 20- and the half nuts 20-2 and 20-3 has been described as an example. The lower end of the vibration damping member 18 may be a member that can be regulated from the inside and the outside of the first vibration damping member 18, and is not limited to the structure shown in FIGS. 12 and 13.

Here, with reference to Drawing 1-Drawing 13, the construction method of the damping structure of a 1st embodiment which constructs damping structure 11 to hanging bolt 3 newly installed is explained.
First, one third member 23A, the pair of first members 21A and 21B, and the pair of second members 22A and 22B were temporarily fixed by a plurality of screws 24 screwed halfway. The structure 25 and the other third member 23B are prepared.

Next, the two dewa washers 26, the second damping member 19, and the position restricting member 20 are attached to all the suspension bolts 3 for constructing the damping structure 11 (member attaching step).
After that, 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 And the groove which guides the suspension bolt 3 to the 1st and 2nd through-holes 21-5 and 22-5 is formed in the 2nd structure 21 and 22.

Then, the top plate portion 21-2 is arranged between the two deck washers 26, and the bottom plate portion 22-2 is arranged between the two washers 20-1. The suspension bolt 3 is inserted into the through holes 21-5 and 22-5 of 2 (suspension bolt insertion step).

Then, the position of the upper end of the first damping member 18 with respect to the suspension bolt 3 is regulated using the second damping member 19 so that the first damping member 18 is pressed against the fixing member 2 (first Position regulation process).
Then, the position regulating member 20 is used to regulate the position of the lower end of the first vibration damping member 18 with respect to the suspension bolt 3 (second position regulating step).

Next, by completely screwing the plurality of screws 24, the one third member 23A, the pair of first members 21A and 21B, and the pair of second members 22A and 22B are completely fixed. To do.
After that, by using the plurality of screws 24, the other third member 23B is fixed to the pair of first members 21A and 21B and second members 22A and 22B forming the structure 25, The construction of the damping structure 11 for the newly installed suspension bolt 3 is completed.

Here, with reference to Drawing 1-Drawing 13, the construction method of the damping structure of a 1st embodiment which constructs damping structure 11 to existing hanging bolt 3 is explained.
First, one third member 23A, the pair of first members 21A and 21B, and the pair of second members 22A and 22B were temporarily fixed by a plurality of screws 24 screwed halfway. The structure 25 and the other third member 23B are prepared.

Next, the two de washers 26, the second damping member 40 shown in FIG. 17, which will be described later, and the position restricting member 20 are attached to all the suspension bolts 3 for constructing the damping structure 11 (member attaching step). ..
Then, 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, the 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.

Then, the top plate portion 21-2 is arranged between the two deck washers 26, and the bottom plate portion 22-2 is arranged between the two washers 20-1. The suspension bolt 3 is inserted into the through holes 21-5 and 22-5 of 2 (suspension bolt insertion step).

Then, the position of the upper end of the first damping member 18 with respect to the suspension bolt 3 is regulated using the second damping member 40 so that the first damping member 18 is pressed against the fixing member 2 (first Position regulation process).
Then, the position regulating member 20 is used to regulate the position of the lower end of the first vibration damping member 18 with respect to the suspension bolt 3 (second position regulating step).

Next, by completely screwing the plurality of screws 24, the one third member 23A, the pair of first members 21A and 21B, and the pair of second members 22A and 22B are completely fixed. To do.
After that, by using the plurality of screws 24, the other third member 23B is fixed to the pair of first members 21A and 21B and second members 22A and 22B forming the structure 25, Construction of the seismic damping structure 11 on the existing suspension bolt 3 is completed.

According to the vibration-damping structure 11 of the first embodiment, the first vibration-damping member 18 functions as a brace for the suspension bolt 3, so that the second vibration-damping member 18 can suppress interference with a duct or another device before With the damping member 19, it is possible to reduce the vibration of the suspension bolt 3 due to an earthquake or the like.
In addition, the pair of first to third members 21A, 21B, 22A, 22B, 23A, 23B constituting the first vibration damping member 18 pass through the first and second through holes 21-5, 22-5. Since it is composed of a half body that is divided into two parts, it can be easily applied not only to the newly installed suspension bolt 3 but also to the existing suspension bolt 3 that supports the equipment 6. it can.

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

In addition, by fixing the pair of third members 23A, 23B to the pair of first and second members 21A, 21B, 22A, 22B using the plurality of screws 24, the first reduction of the suspension bolt 3 is performed. The seismic member 18 can be easily attached and detached.

According to the method of constructing the damping structure of the first embodiment (the method of constructing the damping structure 11 on the new and existing suspension bolts 3), it is equivalent to the damping structure 11 of the first embodiment. The effect can be obtained.
According to the method for constructing the seismic reduction 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, Prepares a structure temporarily fixed with a plurality of screws 24 (specifically, prepares the structure 25 at a stage before going to the construction site), so that the structure is attached to the hanging bolt 3 at the construction site. After mounting 25, the plurality of temporarily fixed screws 24 are completely screwed together, and another plurality of screws 24 are screwed together, so that a pair of the first member and the second member constituting the structure 25 is formed. It is possible to fix 21A, 21B, 23A, 23B and the other third member 23B.
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 seismic damping member 18 can be shortened).

Here, with reference to Drawing 1-Drawing 13, a damping structure concerning a modification of a 1st embodiment (henceforth "the damping structure of a modification") is explained.
The seismic reduction structure of the modification is different from the plurality of screws 24, and the seismic reduction structure of the first embodiment except that the first to third structures 21 to 23 are fixed by welding. The configuration is the same as 11.
In the vibration damping structure of the modified example, for example, locations corresponding to the positions where the plurality of screws 24 are arranged 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 damping structure according to the modified example of the first embodiment having the above-described configuration, the plurality of screws 24 are not required, so that the cost of the damping structure can be reduced.
Further, the seismic reduction structure according to the modification of the first embodiment can obtain the same effect as that of the seismic reduction structure 11 of the first embodiment described above.

The welding and the screw 24 may be combined. Specifically, instead of using the plurality of screws 24, the structure 25 is formed by using a welding method, and the other third member 23B is fixed to the structure 25 with the plurality of screws 24. Good.

Next, a method of constructing the seismic reduction structure when constructing the seismic reduction structure of the modified example with respect to the newly installed suspension bolt 3 will be described.
The method of constructing the seismic reduction structure of the modified example with respect to the newly installed suspension bolt 3 is the same as the method of constructing the structure 25 described in the first embodiment except for the step of completely screwing together the plurality of screws 24, Using a plurality of screws 24, 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, In the first embodiment, 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 forming the structure. This can be performed by the same method as the construction method of the seismic reduction structure described above.

Next, a method of constructing the seismic reduction structure when the seismic reduction structure of the modified example is constructed on the existing hanging bolt 3 will be described.
The method of constructing the seismic reduction structure of the modification with respect to the existing hanging bolt 3 is the same as the method of constructing the structure 25 described in the first embodiment except for the step of completely screwing together the plurality of screws 24. 24, the structure is replaced with a process of fixing the other third member 23B to the pair of first member 21A, 21B and second member 22A, 22B forming the structure 25. With the exception of having a welding step of welding the other third member 23B to the pair of the first member 21A, 21B and the second member 22A, 22B constituting the reduction member described in the first embodiment. It can be performed by the same method as the construction method of the seismic structure.

According to the method of constructing the seismic reduction structure of the modified example of the first embodiment (the method of constructing the seismic reduction structure of the modified example on the new and existing suspension bolts 3), a plurality of screws 24 are unnecessary. , 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 damping structure of the modification of the first embodiment can obtain the same effect as the construction method of the damping structure of the first embodiment.

(Second embodiment)
FIG. 16 is a side view of a second seismic damping member according to the second embodiment of the present invention. Note that, in FIG. 16, a part of the second vibration damping member 30 is illustrated in a cross section. Further, in FIG. 16, the same components as those of the structure shown in FIG. 14 are designated by the same reference numerals.

With reference to Drawing 1, Drawing 14, and Drawing 16, it replaces with the 2nd damping member 19 which constitutes damping structure 11 shown in Drawing 1, and it is a 2nd implementation applicable to damping structure 11 The 2nd damping member 30 which concerns on a form is demonstrated.
The second damping member 30 has the nut portion 12 and the support portion 13 having the same structure as the second damping member 19 described in the first embodiment, and constitutes the second damping member 19. A damping member 21 is provided instead of the damping member 17.

The damping member 31 that constitutes the second vibration damping member 30 has a tubular portion 31a that can be inserted into the insertion hole 13a of the support portion 13, but does not have a flange portion, and is located outside the opening of the insertion hole 13a. It has a cylindrical protrusion 31b formed by extending the cylindrical portion 31a in the length direction.
The damping member 31 is preferably made of, for example, a high damping material that is the material of the damping member 17 described in the first embodiment. Further, the damping member 31 is preferably colored.

The second damping member 30 provided with the damping member 31 is used by being screwed to the hanging bolt 3 at a position close to the ceiling driving body F, similarly to the ceiling suspension device 1 with the damping 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 attached to the deck plate 4. By pushing it to the side, it is possible to realize the seismic damping structure of the ceiling suspension device.

According to the 2nd seismic damping member 30 of 2nd Embodiment, the vibration of the suspension bolt 3 at the time of an earthquake is damped, and the equipment 6 can be stably supported without shaking excessively, and the equipment 6 can be prevented from falling. It can prevent and protect the equipment 6.
Further, whether or not the second vibration damping member 30 is attached to the hanging bolt 3 can be recognized and confirmed by the operator visually confirming the colored cylindrical protruding portion 31b.

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

With reference to Drawing 1 and Drawing 17, it replaces with the 2nd damping member 19 which constitutes damping structure 11 shown in Drawing 1, and it is the 3rd of the 3rd embodiment applicable to damping structure 11 The vibration damping member 40 of No. 2 will be described.
The second vibration damping member 40 includes a high nut 42, and is configured by fitting a tubular damping member 41 to the high nut 42. The second vibration damping member 40 has two support portion halves 41A. The two support part halves 41</b>A are, for example, resin or metal halves.

The damping member 41 includes an upper tubular portion 41a that can be fitted and a lower tubular portion 41b that extends below the upper tubular portion 41a outside the hexagonal high nut 42.
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 tubular portion 41a, and the hanging bolt 3 is inserted into the inner center of the lower tubular portion 41b. Possible lower holes 41d are arranged.

The upper tubular portion 41a and the lower tubular portion 41b connect the two support portion halves 41A so as to be openable and closable via a hinge portion 41B. A tubular damping member 43 is provided on the inner peripheral portion of the lower tubular portion 41b.
In addition, an inward ring-shaped protrusion 41e is inserted in the inner peripheral surface of the boundary portion between the upper cylinder portion 41a and the lower cylinder portion 41b. It is held by being sandwiched.
In addition, a holed locking piece 41f and a protrusion 41g are attached to the opposite sides of the two supporting part halves 41A from the hinge joint part, and by fitting the locking piece 41f and the protrusion 41g, The configuration is such that one support half body 41A can be locked in a cylindrical closed state.

The damping member 43 is made of, for example, a rubber-based or elastomer-based highly damped material having a rubber hardness of 60 degrees or more according to JIS K6253 according to durometer type A and a loss coefficient (tan δ) at room temperature of 0.5 or more. Preferably.
The damping member 43 is preferably made of, for example, a high damping material similar to the damping member 17 described in the first embodiment, and is colored similarly to the damping member 17.
Further, it is preferable that the upper tubular portion 41a and the lower tubular portion 41b made of resin are also colored.

The second damping member 40 including the damping member 43 described above is screwed to a position near the ceiling driving body F of the suspension bolt 3 and used for damping.
The damping member 43 is on the lower side, the high nut 42 is on the upper side, and the high nut 42 is screwed onto the suspension bolt 3 at a position close to the deck plate 4, so that the vibration damping structure of the ceiling suspension device can be realized. ..

According to the 2nd damping member 40 of 3rd Embodiment, the vibration of the suspension bolt 3 at the time of an earthquake is reduced, and the equipment 6 can be stably supported without shaking excessively, and the equipment 6 can be prevented from falling. It is possible to prevent and protect the equipment 6.

Further, whether or not the second damping member 40 is attached to the suspension bolt 3 is recognized by visually confirming the colored tubular damping member 43 or the colored upper tubular portion 41a and lower tubular portion 41b. can do.
In addition, when the second damping member 40 is attached to the suspension bolt 3, the two supporting portions 41A of the half-split tube type can be opened and closed via the hinge portion 41B. With the half body 41A opened, it is possible to mount the suspension bolt 3 on the high nut 42 from the side, so that the suspension bolt 3 can be mounted on the existing suspension bolt 3 without the second vibration damping members 19 and 30. And can be easily attached.

(Fourth Embodiment)
FIG. 18: is sectional drawing of the 2nd seismic damping member which concerns on the 4th Embodiment of this invention.
Referring to FIG. 18, instead of the second damping member 19 that constitutes the damping structure 11 shown in FIG. 1, the second damping of the fourth embodiment applicable to the damping structure 11 is applied. The member 50 will be described.

The second vibration damping member 50 has a main body portion 53 and a damping member 54. The main body portion 53 can be configured, for example, such that an inner cylinder 52 is inserted into an inner upper portion of an outer cylinder 51 made of steel or hard resin having a quadrangular outer shape.
The damping member 54 is a flanged tubular member that is fitted to the lower side of the outer cylinder 51 with the main body 53 standing upright.

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

The damping member 54 includes a tubular portion 54a and a collar portion 54b. The tubular portion 54a is fitted into the insertion hole 51a, and the collar portion 54b is fitted to the outer barrel 51 by covering the lower end opening of the outer barrel 51. ing.
The damping member 54 can be made of, for example, a high damping material similar to the high damping material used as the material of the damping member 17 of the first embodiment. Further, the damping member 54 is preferably colored.

The second damping member 50 including the damping member 54 is screwed to a position close to the ceiling driving body F of the suspension bolt 3 and is similar to the ceiling suspension device 1 with the damping structure shown in FIG. Used as.
The damping member 54 is on the lower side, the inner cylinder 52 is on the upper side, and the threaded portion 52a is screwed to a portion of the suspension bolt 3 near the deck plate 4, whereby a vibration damping structure of the ceiling suspension device can be realized.

According to the 2nd damping member 50 of 4th Embodiment, the vibration of the suspension bolt 3 at the time of an earthquake is reduced, and the equipment 6 can be stably supported without shaking excessively, and the equipment 6 can be prevented from falling. It is possible to prevent and protect the equipment 6.

In the 2nd seismic damping member 50 of 4th Embodiment, the outer cylinder 51 and the inner cylinder 52 are integrated by pushing the inner cylinder 52 which has the screw part 52a into the outer cylinder 51 in advance, and integrating it. The part 53 can be configured.
Like the second vibration damping member 19 described in the first embodiment, if the threaded portion inside the commercially available long nut is partially processed and scraped off to form the insertion hole 17a, the manufacturing cost becomes high. .. Therefore, when it is desired to further reduce the manufacturing cost, the second vibration damping member 50 of the fourth embodiment is suitable.

In addition, the second vibration damping member 50 has the main body portion 53 only by fitting the straight tubular outer cylinder 51 that does not have a screw portion and the like and the inner cylinder 52 in which the screw 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.
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 of bonding or the like.

(Fifth Embodiment)
FIG. 19 is a side view of the second seismic damping member according to the fifth embodiment of the present invention.
With reference to FIG. 19, in place of the second damping member 19 constituting the damping structure 11 shown in FIG. 1, the second damping of the fifth embodiment applicable to the damping structure 11 is applied. The member 60 will be described.

The second vibration damping member 60 includes a high nut 62, and is configured by fitting a tubular damping member 61 to the high nut 62. The damping member 61 includes an upper tubular portion 61a that can be fitted to the outside of a hexagonal high nut 62, and a lower tubular portion 61b that extends in a tapered shape below the upper tubular 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 tubular portion 61a. A lower hole 61d into which the hanging bolt 3 can be inserted is formed in the center of the inside of the lower cylinder portion 61b. Further, a restraining member 65 including a metal ring, a hard resin band, a ring, or the like is attached so as to surround the outer circumference of the upper tubular portion 61a.

The damping member 61, for example, has a rubber hardness of 60 degrees or more according to the durometer type A specified in JIS K6253 and has a loss coefficient (tan δ) at room temperature of 0.5 or more, which is a rubber-based or elastomer-based high damping material. It is recommended to use wood.
That is, the damping member 61 is preferably made of the same high damping material as the damping member 17 described in the first embodiment, and is preferably colored.

The 2nd seismic damping member 60 provided with the damping member 61 is screwed in the position near the ceiling driving body F of the suspension bolt 3 like the ceiling damping device 1 with a damping structure shown in FIG. Used as.
The damping member 61 is on the lower side, the high nut 62 is on the upper side, and the high nut 62 is screwed onto the suspension bolt 3 close to the deck plate 4, whereby the seismic damping structure of the ceiling suspension device can be realized.

According to the 2nd seismic damping member 60 of 5th Embodiment, the vibration of the suspension bolt 3 at the time of an earthquake is damped, and the equipment 6 can be stably supported without shaking excessively, and the equipment 6 can be prevented from falling. It can prevent and protect the equipment 6.
The restraint member 65 restrains the outer peripheral portion of the upper tubular portion 61a and suppresses the deformation of the upper tubular portion 61a due to the vibration or deformation of the suspension bolt 3 when it is assumed that the strength of the damping member 61 is insufficient. The upper tubular portion 61a is held so as not to fall off the high nut 62.
Further, whether or not the second damping member 60 is attached to the hanging bolt 3 can be confirmed by visually confirming the colored damping member 61.

(Sixth Embodiment)
FIG. 20 is a partial cross-sectional view of a second seismic damping member according to the sixth embodiment of the present invention.
With reference to FIG. 20, it replaces with the 2nd damping member 19 which comprises the damping structure 11 shown in FIG. 1, and 2nd damping of 6th Embodiment applicable to the damping structure 11 The member 70 will be described.

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

An upper hole 71c into which the lower side of the hexagonal high nut 72 can be fitted is provided at the center of the upper portion of the upper tubular portion 71a, and the hanging bolt 3 is inserted through the center of the inside of the lower tubular portion 71b. A possible lower hole 71d is arranged.
A fitting hole 73d into which a hexagonal high nut 72 can be pressed and fitted is provided in the inner center of the upper end peripheral wall 73a of the outer cylinder 73, and the outer cylinder 73 is integrally fitted to the high nut 72. ing.

The damping member 71 is, for example, a rubber-based rubber having a rubber hardness of 60 degrees or more, for example, 60 to 90 degrees according to the durometer type A defined in JIS K6253, and a loss coefficient (tan δ) at room temperature of 0.5 or more. Alternatively, it is preferably composed of an elastomer-based high damping material.
That is, the damping member 71 is preferably made of a high damping material similar to the damping member 17 described above. Further, the damping member 71 is preferably colored. Furthermore, it is preferable that the outer cylinder 73 is also colored.

The second damping member 70 is screwed to a position close to the ceiling driving body F of the suspension bolt 3 and is used for damping.
The damping member 71 is on the lower side, the high nut 72 is on the upper side, and the high nut 72 is screwed to a portion of the suspension bolt 3 near the deck plate 4, whereby a vibration damping structure of the ceiling suspension device can be realized.

According to the 2nd seismic damping member 70 of 6th Embodiment, the vibration of the suspension bolt 3 at the time of an earthquake is damped, and the equipment 6 can be stably supported without shaking excessively, and the equipment 6 can be prevented from falling. It can prevent and protect the equipment 6.
The outer cylinder 73 restrains the outer peripheral portion of the upper cylinder portion 71a and the lower cylinder portion 71b, suppresses deformation of the upper cylinder portion 71a due to vibration or deformation of the hanging bolt 3, and the upper cylinder portion 71a has a high nut. Hold it so that it does not fall off 72.
Further, whether or not the second damping member 70 is attached to the hanging bolt 3 can be determined by visually confirming the colored damping member 71 and the outer cylinder 73.

(Seventh embodiment)
FIG. 21: is a partial cross section figure which shows the ceiling-mounted apparatus with a damping structure provided with the damping structure which concerns on the 7th Embodiment of this invention. 21, the same components as those of the structure shown in FIG. 1 are designated by the same reference numerals.

Referring to FIG. 21, the ceiling-mounted device 75 with a vibration-damping structure according to the seventh embodiment has a structure in which the equipment 6 is suspended from the ceiling driving body F by the suspension bolt 3 and is supported by the ceiling driving body. Regarding the structure in which the second damping member 19 is attached to the portion where the hanging bolt 3 is projected from F and the first damping member 18 is provided along the hanging bolt 3, the structure described in the first embodiment is used. Is the same as.

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

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

According to the ceiling-mounted device 75 with the vibration-damping structure of the seventh embodiment, the presence of the first and second vibration-damping members 18, 19 makes the ceiling-mounted structure similar to the structure of the first embodiment. It acts to reduce the earthquake.
Further, since the equipment 6 is suspended from the ceiling by the suspension bolt 3 via the spring hanger 81, the elasticity of the coil spring 80 can be used to reduce the vibration of the equipment 6 when an earthquake shakes the equipment 6. It becomes possible to shake.
Thus, the seismic action of the second seismic damping member 19, the brace structure effect of the first seismic damping member 18, and the seismic damping action of the spring hanger 81 are utilized to reduce the earthquake Vibration can be suppressed.

(Eighth Embodiment)
FIG. 22: is a perspective view of the 1st damping member which concerns on the 8th Embodiment of this invention, and is a figure which shows the 1st damping member of the stage (shipment stage) before attaching to a suspension bolt typically. Is. In FIG. 22, as an example, the case where the third members 23A and 23B and the upper member 93 and the lower member 95 are fixed by using the plurality of screws 24 is illustrated.

With reference to FIG. 22, the first vibration damping member 90 of the eighth embodiment includes the first and second structures 21, which configure the first vibration damping member 18 described in the first embodiment. It is configured in the same manner as the first vibration damping member 18 except that it has an upper member 93 and a lower member 95 instead of 22.
As a result, the structure 91 that constitutes the first vibration damping member 90 is configured to include 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 until 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 hanging bolt insertion groove 93-. It is configured similarly to the first structural body 21 except that the first structural body 21 is provided.
The first hanging 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. The top plate portion 93-2 is provided so as to extend to the formation position of 21-5.
The suspension bolt is arranged at the inner side of the first suspension bolt insertion groove 93-3 (the formation position of the first through hole 21-5).
The second plate portion 93-1 has a configuration in which the two second plate portions 21-3 shown in FIG. 2 are integrated.

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 the second hanging bolt insertion groove 95-. The second structure 22 is configured similarly to the second structure 22 except that the second structure 22 is provided.
The second hanging bolt insertion groove 95-3 is formed from the outer edge of the bottom plate portion 95-2 where the third and fourth plate portions 22-1 and 95-1 are not provided to the second through hole 22 shown in FIG. The bottom plate portion 95-2 is provided so as to extend to the formation position of −5.
The suspension bolt is arranged at the inner side of the second suspension bolt insertion groove 95-3 (the formation position of the second through hole 22-5).
The fourth plate portion 95-1 has a configuration in which the two fourth plate portions 22-3 shown in FIG. 2 are integrated.

According to the first vibration damping member 90 according to the eighth embodiment configured as described above, 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 member), the number of parts of the first vibration damping 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 seismic damping member 90 is attached to the existing bolt, the inside of the upper member 93 and the lower member 95 Since it is possible to easily dispose the bolts on the existing bolts, the existing bolts can be easily installed.
The first vibration damping member 90 of the eighth embodiment can obtain the same effect as that of the first vibration damping member 18 of the first embodiment described above.

When a damping structure (not shown) is configured using the above-described first damping member 90, for example, the damping structure may include, for example, the first damping member 90 and the second damping member. The vibration member 19 (see FIGS. 12 to 14) and the position restricting member 20 (see FIGS. 12 and 13) can be used.
In the following description, the damping structure having such a configuration is referred to as the damping structure of the eighth embodiment.

Note that, in FIG. 22, as an example, the case where the third members 23A and 23B and the upper member 93 and the lower member 95 are fixed using the plurality of screws 24 has been described as an example. Instead of using the plurality of screws 24, for example, by welding the places corresponding to the positions where the plurality of screws 24 are arranged, the third members 23A and 23B and the upper member 93 and the lower member 95 are connected. You may fix it.
As the welding method, for example, a spot welding method, a full circumference welding method, or the like can be used.

As described above, by fixing the third members 23A and 23B and the upper member 93 and the lower member 95 by welding instead of the plurality of screws 24, the plurality of screws 24 become unnecessary. The cost 90 of the seismic damping structure can be reduced.

Further, the welding and the screw 24 may be combined. Specifically, instead of using the plurality of screws 24, a welding method may be used to form the structure 91, and the other third member 23B may be fixed to the structure 91 with the plurality of screws 24. Good.

Next, with reference to FIG. 1, FIG. 12, FIG. 13, and FIG. 22, the 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 when constructing will be described.
First, one third member, the upper member 93, and the lower member 95 are arranged so that the second and fourth plate portions 93-1 and 95-1 come into contact with the one third member 23A. And the welded structure 91 and the other third member 23B are prepared (preparing step).

Next, the second vibration damping member 19 (when constructing the existing hanging bolt 3, the second vibration damping member 40 (FIG. 17) is used) and the position regulating member 20 are attached to the hanging bolt 3 (member). 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. It is placed in the back of -3, 95-3 (hanging bolt insertion step).

Then, the structure for the hanging bolt 3 is formed by using the second damping member 19 (the second damping member 40 when the existing hanging bolt 3 is used) so as to press the structure 91 against the fixing member 2. The position of the upper end of the body 91 is restricted (first position restricting step).
Next, the position regulating member 20 is used to regulate the position of the lower end of the structure 91 with respect to the hanging bolt 3 (second position regulating step).
Next, the other third member 23B is welded to the upper member 93 and the lower member 95 that form the structure 91 (welding process).
This completes the construction of the seismic damping structure according to the eighth embodiment.

According to the method for constructing the seismic damping structure according to the eighth embodiment, even when constructing the existing suspension bolt 3, the seismic reduction structure can be easily inserted into the first and second suspension bolt insertion grooves 93-3, 95-3. Since the hanging bolt 3 can be guided, the construction can be easily performed.
In addition, the construction method of the damping structure of the eighth embodiment can obtain the same effect as the construction method of the damping structure 11 of the first embodiment.

In the construction method of the vibration damping structure of the eighth embodiment, the case of using welding has been described as an example, but a plurality of screws 24 may be used instead of welding.
In this case, in the preparation step, instead of the welded structure 91, the one third member 23A, the upper member 93 and the lower member 95 are fixed by the plurality of screws 24. In place of the welding process, a plurality of screws are used to fix the other third member 23B to the upper member 93 and the lower member 95 forming the structure 91.

Although the preferred embodiments of the present invention have been described in detail above, the present invention is not limited to these specific embodiments, and various modifications are possible within the scope of the gist of the present invention described in the claims. It can be modified and changed.
For example, in the above-described first to eighth embodiments, the case where the outer shape of the first seismic damping member 18 is a quadrangular prism has been described as an example, but the outer shape of the first seismic damping member 18 is, for example, It may be a cylinder or a polygonal prism other than a square prism.

The present invention, in a structure for suspending and supporting facility equipment, reduces the vibration of a suspension bolt that supports the facility equipment so that the facility equipment can be stably supported even when shaken by an earthquake or the like. It can be applied to the construction method of the structure and the seismic reduction structure.

1, 75... Ceiling suspension device with a vibration-reducing structure, 2... Fixing member, 3... Hanging bolt, 4... Deck plate, 4A... Groove, 5... Connecting tool, 5a... Lower support piece, 5b... Extending piece, 5c ...Upper support piece 6...Equipment, 6a...Support piece, 8...Bolt, 9...Nut, 11...Vibration reduction structure, 12...Nut part, 12a...Screw hole, 13...Support part, 13a, 51a...Insertion hole , 13b... Circumferential step portion, 15... Main body portion, 17, 31, 41, 54, 61, 71... Damping member, 17a, 54a... Cylindrical portion, 17b, 54b... Collar portion, 18, 90... First vibration reduction Member, 19, 30, 40, 50, 60... 2nd damping member, 20... Position regulation member, 20-1... Washer, 20-2, 20-3... Half nut, 21... 1st structure , 21A, 21B... First member, 21-1... First plate part, 21-2, 93-2... Top plate part, 21-3, 93-1... Second plate part, 21-4, 22-4, 23-5... screw hole, 21-5... first through hole, 22... second structure, 22A, 22B... second member, 22-1... third plate portion, 22- 2, 95-2... bottom plate part, 22-3, 95-1... fourth plate part, 22-5... second through hole, 23... third structure, 23A, 23B... third member, 23-1... Fifth plate part, 23-2... Sixth plate part, 23-3... Seventh plate part, 23-4... Eighth plate part, 23-6... Hollow part, 24... Screw , 25, 91... Structure, 26... Deca washer, 31a... Cylindrical part, 31b... Projection part, 41a, 61a, 71a... Upper cylinder part, 41b, 61b, 71b... Lower cylinder part, 41c... Upper hole, 41d... Lower hole, 41e... Locking piece, 41f... Projection part, 41A... Support part half body, 42, 62, 72... High nut, 51, 73... 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 portion, 83... Upper support plate, 84... Lower support plate, 85... Washer, 86, 88, 89... Nut, 93... Upper member, 93-3... First hanging bolt insertion groove, 95... Lower member, 95-3... Second hanging bolt insertion groove, F... Ceiling frame

Claims (14)

A seismic damping structure that is provided on a plurality of suspension bolts that are suspended from the ceiling by fixing the upper end to a fixing member that is internally provided on the ceiling and that suspends and suspends equipment from the ceiling,
A first seismic damping member that is provided in each of the plurality of suspension bolts located below the fixing member, has a hollow portion through which a part of the suspension bolt communicates, and reduces the vibration of the suspension bolt. When,
A second damping member that is disposed in the first damping member, presses the first damping member against the fixing member, and reduces the vibration of the suspension bolt;
A position restricting member that restricts the position of the lower end of the first vibration damping member with respect to the suspension bolt,
The first vibration damping member is a pair of first members, a pair of second members, a pair of first members, and a pair of third members that accommodate the pair of second members. And have,
The pair of first members are arranged to face each other, and extend in a plane direction orthogonal to the extending direction of the hanging bolt and two first plate portions extending in the extending direction of the hanging bolt, the two are connected to the upper end of the first plate portion, and a top plate portion of square the hanging bolts in the center has a first through-hole penetrating the two four sides walls of the first plate portion A first structure having two side wall parts and a second plate part connected to the top plate part that are arranged to face each other, the center of the first through hole, and the first structure body. The first structure is divided into two so as to pass through the second plate portion,
The pair of second members are arranged to face each other, and extend in a plane direction orthogonal to the extending direction of the hanging bolt, and two third plate portions extending in the extending direction of the hanging bolt, A rectangular bottom plate portion that is connected to the lower ends of the two third plate portions and has a second through hole in the center through which the hanging bolt penetrates, and four side end portions of the two third plate portions. A second structure having two side ends arranged opposite to each other and a fourth plate connected to the bottom plate, the center of the second through hole, and the second structure. The second structure is divided into two so as to pass through the plate portion of No. 4, and
An upper end and a lower end of the pair of third members are open ends, and the third structure is a rectangular columnar member having the hollow portion for accommodating the first and second structures therein. And
The pair of third members extends in the extending direction of the hanging bolt, and extends in the extending direction of the hanging bolt, and a fifth plate portion that contacts the second and fourth plate portions. Then, 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, and one of the first plate portion A seventh plate portion that is in contact with the first and third plate portions and is connected to the fifth and sixth plate portions, and extends in the extending direction of the hanging bolt, and the other of the first and the third plate portions. Passing through the first and second through holes through the third structure having an eighth plate part that is in contact with the third plate part and is connected to the fifth and sixth plate parts. As described above, it is configured by dividing the seventh and eighth plate portions into two,
Two corner portions formed of the two first plate portions and the second plate portion and extending in the extending direction of the hanging bolt, the two third plate portions, and the fourth corner portion. Two corners formed of a plate portion and extending in the extending direction of the hanging bolt are in contact with two adjacent corners formed inside the third structure. Seismic damping structure characterized by. The first vibration damping member includes an upper member and a lower member in place 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 not provided with the first and second plate portions. The top plate portion is provided so as to extend from the outer edge to the formation position of the first through hole, and has a first hanging bolt insertion groove into which the hanging 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, the outer edge of the bottom plate portion not provided with the third and fourth plate portions. The second suspension bolt insertion groove, which is provided in the bottom plate portion so as to extend from the second suspension hole to the formation position of the second through hole, and into which the suspension bolt is inserted. Quake structure. The seismic reduction 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. The seismic reduction 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 seismic reduction structure according to claim 2, wherein the pair of third members are fixed to the upper member and the lower member by welding. The seismic reduction 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 damping member includes a nut portion to which the suspension bolt is screwed,
A cylindrical support part that is provided so as to extend from the nut part in the central axis direction of the nut part, and through which the suspension bolt can be inserted,
A tubular damping member that is inserted into the support portion and that 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 high damping material having a rubber hardness of 60 degrees or more and a loss coefficient (tan δ) of 0.5 or more. , The vibration damping structure according to any one of items. The second vibration damping member is a high nut with which the suspension bolt is screwed,
An upper insertion hole into which the lower side of the high nut can be fitted, and a tubular damping member which 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 high damping material having a rubber hardness of 60 degrees or more and a loss coefficient (tan δ) of 0.5 or more. , The vibration damping structure according to any one of items. The second vibration damping member is a high nut with which the suspension bolt is screwed,
In the upper part, a resin-made cylindrical support portion attached to the high nut so as to surround the high nut,
A damping member arranged in the lower part of the inside of the support,
Including
The said resin cylindrical support part is made into two half-divided bodies, The said one half-divided body is hinge-joined so that the other half-divided body can be opened and closed freely. The seismic reduction structure according to any one of items 1 to 6. A method for constructing a damping structure for constructing the damping structure according to any one of claims 1, 3 and 4 to the newly installed suspension bolt,
A preparatory step of preparing a structure obtained by welding the one third member, the pair of first members, and the pair of second members, and the other third member; ,
A member attaching step of attaching the second damping member and the position regulating member to the suspension bolt;
A hanging bolt inserting step of inserting the hanging bolt into the first and second through holes provided in the structure;
A first position regulating step of regulating the position of the upper end of the structure with respect to the suspension bolt by using the second damping member so as to press the first damping member against the fixing member;
A second position regulation step of regulating the position of the lower end of the structure with respect to the suspension bolt using the position regulation member;
A welding step of welding the other third member to the pair of first and second members forming the structure;
A method for constructing a seismic damping structure, which includes: A method for constructing a seismic reduction structure for constructing the seismic reduction structure according to any one of claims 1, 3, and 4 with respect to the existing suspension bolt,
A preparatory step of preparing a structure obtained by welding the one third member, the pair of first members, and the pair of second members, and the other third member; ,
A member attaching step of attaching the second damping member and the position regulating member to the suspension bolt;
A groove for guiding the suspension bolt is formed in the first and second through holes by laterally opening the pair of first and second members forming the structure, and the groove is routed through the groove. A hanging bolt inserting step of inserting the hanging bolt into the first and second through holes;
A first position regulating step of regulating the position of the upper end of the structure with respect to the suspension bolt by using the second damping member so as to press the first damping member against the fixing member;
A second position regulation step of regulating the position of the lower end of the structure with respect to the suspension bolt using the position regulation member;
A welding step of welding the third member of the other to the pair of the first member and the second member constituting the structure;
A method for constructing a seismic damping structure, which includes: In the preparation step, in place of the welded structure, the one third member, the pair of first members, and the pair of second members, and a plurality of half-threaded screws Prepare the structure temporarily fixed with screws,
By completely screwing the plurality of screws after the step of inserting the hanging bolt, the one third member, the pair of first members, and the pair of second members are completely joined together. Fixing process,
Instead of the welding step, using a plurality of screws, the step of fixing the other of the third member to the pair of the first member and the second member constituting the structure,
The method for constructing a seismic reduction structure according to claim 10 or 11, further comprising: A method for constructing a damping structure for constructing the damping structure according to any one of claims 2 and 5 to the newly installed or existing suspension bolt,
A structure in which the one third member is welded to the upper member and the lower member so that the second and fourth plate portions come into contact with the one third member. And a preparation step of preparing the other third member,
A member attaching step of attaching the second damping member and the position regulating member to the suspension bolt;
A 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 arranged deep inside the first and second suspension bolt insertion grooves. Process,
A first position regulating step of regulating the position of the upper end of the first vibration damping member with respect to the suspension bolt by using the second vibration damping member so as to press the structure against the fixing member;
A second position regulation step of regulating the position of the lower end of the structure with respect to the suspension bolt using the position regulation member;
A welding step of welding the other third member to the upper member and the lower member that form the structure;
A method for constructing a seismic damping structure, which includes: In the preparing step, in place of the welded structure, a structure in which the one third member, the upper member and the lower member are fixed by a plurality of screws is prepared,
Instead of the welding step, using a plurality of screws, to the upper member and the lower member constituting the structure, fixing the other third member,
The method for constructing a seismic reduction structure according to claim 13, further comprising:

Images