JP2017110731A - Unit type vibration damping device and vibration isolation mount provided with the unit type vibration damping device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a unit type vibration damping device and a vibration isolation mount provided with the unit type vibration damping device.SOLUTION: A unit type vibration damping device includes: a storage body which has a storage space on an inner part, is composed of a bottom wall, lateral walls and a cover plate and has an opening part on a cover plate center part; a core member made of hard resin stored on an inner part of the storage body; a vibration damping material arranged on the circumference of the core member, and so as to surround the core member on the inner side of the storage body; a support shaft which is screwed into a screw hole formed on a center part of the core member, penetrates the opening part of the cover plate and is extended to the upper side; and an attachment plate integrated with an upper end part of the support shaft.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a unit-type vibration isolator and a vibration isolator with the unit-type vibration absorber.

Conventionally, there are various types of anti-vibration mounts that suppress the transmission of vibrations due to the operation of equipment equipment by placing equipment such as power generation equipment or outdoor air conditioners (hereinafter referred to as “equipment equipment”). Proposed.
A general anti-vibration stand includes an upper stand for installing equipment, a lower stand to be fixed to an installation surface such as a floor slab, and a vibration isolating member interposed between the two stands. By absorbing the vibration generated by the vibration isolating member, the vibration is suppressed from being transmitted to the installation surface.
In addition, when an earthquake or a strong wind occurs, there is a risk that the equipment swings with a predetermined amplitude or more and falls. Therefore, a stopper mechanism for preventing separation of the upper frame and the lower frame is provided at the corner portion of the vibration isolation frame for the purpose of preventing the equipment from shaking with a predetermined amplitude or more.

  In the following Patent Document 1, a load carrying base is provided on a base via a vibration isolating member, and a stopper disposed vertically between a seismic frame formed on the base and a load carrying base thereabove is provided. The vibration-proof stand with the earthquake-proof stopper provided is described. In this vibration isolation stand, the vibration isolation member is configured by sandwiching a spring material between the upper member and the lower member.

JP 7-208542 A

  In the vibration isolator described in Patent Document 1, an earthquake-resistant elastic member is interposed in the stopper portion, so that the equipment on the vibration isolator is greatly inclined due to wind pressure or earthquake and is attached to the stopper. Even if the elastic member for working is used, the spring constant changes according to the magnitude of the inclination, and the vibration isolation effect of the vibration isolation member is not impaired.

However, in the vibration isolator described in Patent Document 1, vibration generated by the operation of the equipment can be absorbed by a vibration isolator incorporating a spring material, but the vibration of the equipment due to earthquake motion or wind pressure is suppressed. The mechanism was not specifically incorporated.
For this reason, there is a demand for a mechanism that can add a vibration-reducing action to the vibration isolation frame where equipment is installed. However, replacing the entire vibration isolation frame is inefficient and difficult to construct, so it is difficult to install the existing vibration isolation frame. It is desired to provide a device capable of adding a vibration reducing action to a vibration isolation frame.

  In addition, equipment such as power generation equipment and outdoor air conditioners are often installed near the walls of the outdoors or in the basement walls, and when installing multiple equipment, adjoin each other as much as possible. In general, the outdoor space is effectively used by installing them. Therefore, the anti-vibration stand on which the equipment is placed is also installed near the wall or in the vicinity of other equipment, so when installing a device to add vibration reduction to the existing anti-vibration stand, It is preferable that attachment is easy and construction can be performed easily.

  The present invention has been made in view of the above problems, has a compact structure that is easy to mount on an existing vibration isolation frame and has a unit-type seismic reduction device that can exhibit a vibration-reducing action, and the unit-type vibration reduction device. The purpose is to provide an anti-vibration stand.

  In order to solve the above-described problem, a unit-type vibration damping device of the present invention includes a housing body having a housing space therein, a bottom wall, a side wall, and a lid plate, and having an opening at a center portion of the lid plate, A core member made of a hard resin housed inside the housing body, a vibration reducing material arranged around the core member and surrounding the core member inside the housing body, and a center of the core member A support shaft that is screwed into a screw hole formed in the portion and passes through the opening of the lid plate and extends outward from the lid plate; and a mounting plate that is integrated with the tip of the support shaft. It is characterized by having.

In the present invention, a bottom vibration damping material is disposed between the bottom wall of the container and the core member, and a first gap is formed between the top surface of the bottom vibration damping material and the bottom surface of the core member. A configuration in which an upper vibration damping material and a suppression plate are disposed on the upper surface of the core member, and a second gap is formed between the suppression plate and the lid plate can be employed.
Since the first gap and the second gap are provided above and below the core member, the core member can freely move between these gaps. For this reason, when a unit type vibration isolator is installed on the vibration isolator, there is no effect on the vibration isolation performance of the equipment that the vibration isolator originally has, and the core member exceeds these gaps due to large vibrations caused by earthquake motion and wind pressure. Demonstrates seismic reduction effect when it vibrates with amplitude.

In the present invention, it is possible to adopt a configuration in which a bottom insertion hole is formed in the bottom of the side wall of the container, and a spacer member is inserted in the first gap through the bottom insertion hole.
The spacer member is inserted below the core member inside the housing, and forms a first gap having a target interval corresponding to the thickness of the spacer member below the spacer member. Therefore, by extracting the spacer member, it is possible to define a first gap having a necessary interval below the core member.

In the present invention, a positioning hole is formed on a side surface of the core member, a through hole is formed in the side wall of the container and a vibration reducing material inside the container, and the through hole in the side wall and the through hole of the vibration reducing material are inserted. It is possible to adopt a configuration in which the positioning pins thus inserted are removably inserted into the positioning holes.
By penetrating the container and inserting the positioning pins into the positioning holes of the core member, it is possible to prevent the core member from spinning around inside the container. Insert the unit type vibration isolator between the upper frame and the lower frame, rotate the support shaft along the screw holes to adjust the distance between the mounting plate and the container, and the unit type with no gap between the upper frame and the lower frame When the seismic reduction device is arranged, the protruding amount of the support shaft can be reliably adjusted without idling, so that the unit type seismic reduction device can be reliably and easily installed between the upper frame and the lower frame.

The anti-vibration frame of the present invention includes a lower frame installed on a floor slab, an upper frame installed on the lower frame with a space therebetween, and equipment equipment installed above, and the lower frame and the upper frame. A plurality of vibration isolating members interposed therebetween, and a plurality of unit-type seismic reduction devices described in any one of the above, provided between the lower frame and the upper frame.
If the anti-vibration mount is equipped with the unit-type vibration damping device of the previous configuration, the installation of heavy equipment such as a generator on the upper mount will hinder the function of preventing vibration of the equipment. It is possible to reduce vibrations by suppressing large vibrations of equipment due to earthquake motion and wind pressure.

In the vibration isolator of the present invention, a configuration in which the bottom wall of the unit type vibration isolator is bonded to the upper surface of the lower frame, and the mounting plate of the unit type vibration absorber is bonded to the lower surface of the upper frame. .
Adopting a structure in which the bottom wall of the unit type vibration absorber is bonded to the upper surface of the lower frame and the mounting is bonded to the lower surface of the upper frame, the unit type vibration absorber can be easily and easily installed between the lower frame and the upper frame. Can be attached.

  The unit type vibration damping device of the present invention includes a core member surrounded by a vibration damping material in a container, and a support shaft that is screwed into a screw hole formed in the center of the core member. Since the mounting plate is integrated with the upper end of the support shaft, the upper and lower frames are installed against the existing anti-vibration frame that consists of the upper and lower frames that support the equipment. By mounting it so that it is sandwiched between the bases, the equipment can be easily damped by retrofitting. That is, when the container and the mounting plate are arranged so as to be sandwiched between the upper frame and the lower frame, the vibration from the equipment is transmitted to the vibration reducing material via the support shaft and the core member, and the core member is in contact with it. The vibration from the equipment can be reduced by the vibration-reducing action of the vibration-reducing material.

  In addition, by adjusting the protruding length of the support shaft that extends outward from the container, it is easy to place the unit-type anti-vibration device between the upper frame and the lower frame without any gaps. However, it is easy to attach to the existing anti-vibration stand that does not have a seismic reduction function.

The perspective view which shows an example of the vibration isolator stand to which the unit type vibration isolator of 1st Embodiment which concerns on this invention is applied. Sectional drawing of the unit type vibration isolator attached to the vibration isolator. The top view of the unit type vibration isolator attached to the vibration isolator stand. Sectional drawing which shows an example structure in the case of attaching a unit type seismic-reduction device to the mount frame which supported the equipment. The top view which shows an example structure in the case of attaching a unit type seismic-reduction device to the mount frame which supported the equipment.

  Hereinafter, a unit type vibration isolator which is an embodiment of the present invention and a vibration isolator equipped with the same will be described in detail with reference to FIGS. In addition, in the drawings used in the following description, in order to make the features easy to understand, there are cases where the portions that become the features are enlarged for the sake of convenience, and the dimensional ratios of the respective components are not always the same as the actual ones. Absent.

[First Embodiment]
In FIG. 1, the perspective view of the vibration isolator stand 1 provided with the unit type vibration isolator 30 of 1st Embodiment which concerns on this invention is shown. The anti-vibration frame 1 includes a lower frame (second frame) 14 that is horizontally fixed to a floor slab (installation surface of a slab, etc.) 18 such as a building with a fixing bracket such as an anchor bolt (not shown), and the lower frame. 14 and an upper gantry (first gantry) 12 disposed horizontally opposite to each other with a predetermined gap.
As shown in FIG. 1, a plurality of vibration isolation members 16 are interposed between the first frame 12 and the second frame 14 (six in the example shown in FIG. 1). Thus, the first frame 12 is elastically supported on the second frame 14. The anti-vibration member 16 has a spring material (not shown) inside, and is disposed between the second gantry 14 and the first gantry 12 to load the equipment installed on the first gantry 12. While carrying, it has the effect | action which absorbs and buffers the vibration which generate | occur | produces from an installation apparatus. In consideration of the position of the center of gravity of the equipment installed on the first gantry 12, the necessary number of vibration isolation members 16 are installed at appropriate positions between the second gantry 14 and the first gantry 12.

  As shown in FIG. 1, the first gantry 12 is a rectangular frame-like member in plan view, and spans between the four first corner members 22 arranged at the corners and the first corner members 22. Frame member 12a. The second gantry 14 has the same configuration as the first gantry 12, and includes four second corner members 24 arranged at corners and four frame members 14 a that bridge between the second corner members 24. I have.

The first and second corner members 22 and 24 of the first frame 12 and the second frame 14 are for joining the ends of two frame members 12a and 12a (or frame members 14a and 14a) orthogonal to each other. It is formed in a substantially box shape that is open toward the outside in the horizontal direction. And each frame member 12a, 12a (or frame member 14a, 14a) is joined to the surface which faces the inner side of the horizontal direction among the side surfaces of the first and second corner members 22, 24.
Preliminary stopper structures 20 are provided at the four corners of the vibration isolator 1 and between the first and second corner members 22 and 24. This preliminary stopper structure 20 connects the first gantry 12 and the second gantry 14 so that they can move relative to each other in a vertical direction and a horizontal direction, and the relative displacement of the first gantry 12 with respect to the second gantry 14 can be determined. It is regulated.

  The preliminary stopper structure 20 is configured to fix the preliminary stopper bolt 23 to the top plate portion 24 a of the second corner member 24, and the preliminary stopper bolt 23 inserted into the through hole formed in the bottom plate 22 a of the first corner member 22. The washer 26 and the nut 25 are provided. Further, an unillustrated elastic member is interposed between the through hole formed in the bottom plate 22 a of the first corner member 22 and the preliminary stopper bolt 23. The spare stopper bolt 23 is disposed with its head slightly spaced above the bottom plate 22a of the first corner member 22, while the nut 25 screwed into the lower end side of the spare stopper bolt 23 is A pair is provided above and below the top plate 24 a so as to sandwich the top plate 24 a of the two corner member 24.

The elastic member mounted on the bottom plate 22a of the first corner member 22 is formed from an elastic body such as rubber. Therefore, when there is no horizontal and vertical gap due to the relative movement of the first gantry 12 and the second gantry 14, and the constituent members of the preliminary stopper structure 20 collide with each other, the elastic member absorbs the impact, Prevent damage.
The preliminary stopper structure 20 connects the first gantry 12 and the second gantry 14 so as to be able to move relative to each other a little, and restricts the amount of displacement when they are relatively moved in the vertical and horizontal directions.
Note that the horizontal gap and the vertical gap need only be wide enough to be visually confirmed at the installation site, and are preferably about 3 to 5 mm, for example.

Further, these preliminary stopper structures 20 are preliminarily provided for the purpose of preventing the installed equipment from toppling over when a part of the constituent members of the unit-type seismic reduction device 30 is deformed due to vibration accompanying a large earthquake. Is. Therefore, it is desirable to set the horizontal gap and the vertical gap described above to be larger than the gaps d ₁ to d ₄ provided in the unit type vibration damping device 30 which will be described in detail later. The seismic reduction operation of the unit type seismic reduction device 30 is not hindered.

As shown in FIG. 1, two attachment pieces 28 are provided on the two frame members 12 a and 12 a constituting the long side of the first mount 12. Each attachment piece 28 is provided with an attachment hole 29 for fixing the equipment. After the equipment is placed on the first mount 12, a bolt is inserted into the attachment hole 29 and screwed into the equipment. By doing so, the equipment can be fixed on the first gantry 12.
Each frame member 12a, 14a constituting the first mount 12 and the second mount 14 can adopt a structure formed by forming a rust-proof cast steel or FRP material into a rectangular frame.
The configuration of the vibration isolation frame 1 shown in FIG. 1 is an example, and the material of the frame members 12a and 14a, the number of members constituting the first frame 12 and the second frame 14, and the like are fixed to the first frame 12. It is desirable to determine appropriately according to the weight of the equipment and the vibration characteristics of the equipment.

  In the structure of the present embodiment, between the two frame members 12a and 12a constituting the long side of the first gantry 12 and the two frame members 14a and 14a constituting the long side of the second gantry 14 opposed thereto. In addition, two unit-type vibration damping devices 30 are provided respectively. That is, in the example shown in FIG. 1, four unit-type seismic reduction devices 30 are provided on the first frame 12 and the second frame 14. These unit-type seismic reduction devices 30 suppress the relative movement of the first gantry 12 and the second gantry 14 with a large amplitude during an earthquake, and prevent the equipment from falling over.

2 and 3 show the detailed structure of the unit type vibration damping device 30 of the present embodiment.
As shown in FIGS. 2 and 3, the unit-type vibration damping device 30 is protruded upward from the cylindrical container-type container 31 bonded and fixed to the upper surface side of the frame member 14 a and the upper center of the container 31. The mounting plate 33 is supported horizontally by the support shaft 32 and is adhesively fixed to the lower surface side of the frame member 12a.
The container 31 includes a plate-like bottom wall (bottom plate) 31A, a cylindrical side wall (peripheral wall) 31B standing on the upper surface side of the bottom wall 31A, and a ring integrated with the upper end of the side wall 31B. It consists of a plate-shaped cover plate (ceiling plate) 31C. The bottom wall 31A, the side wall 31B, and the cover plate 31C are all made of a steel plate, and are assembled in a cylindrical shape having a storage space inside by a joining means such as welding.
As an example, in this embodiment, a screw-in cylindrical separation wall 31D is formed on the upper portion of the side wall 31B, and a cover plate 31C is integrated with an upper end portion of the separation wall 31D. An outer screw portion 31E is formed on the lower outer periphery of the separation wall 31D, and the outer screw portion 31E is screwed to an inner screw portion 31F formed on the upper inner peripheral side of the side wall 31B, so that the separation wall 31D is integrated with the side wall 31B. Has been.
The screw-type separation wall 31D can be separated from the side wall 31B by rotating itself around the circumference. The separation wall 31D may be integrated with the side wall 31B.

A disc-shaped first damping material (bottom damping material) 35 having a size covering substantially the entire surface of the inner bottom portion is accommodated in the inner bottom portion of the housing 31, and the first damping material 35 is provided with a first damping material 35. A thick cylindrical core member 38 made of hard resin is provided through the damping member 35, the sliding plate 36, and the spacer member 37.
The sliding plate 36 is made of a metal disk such as a stainless steel plate, and is formed to have a size covering almost the entire upper surface of the first damping material 35. The spacer member 37 includes a main body portion 37A made of a long and thin strip-like metal plate having a length approximately the same as the diameter of the container 31, and a standing piece formed at one end in the length direction of the main body portion 37A. 37a. The spacer member 37 is inserted between the sliding plate 36 and the core member 38 through the bottom insertion hole 31e formed on the bottom side of the side wall 31B, and the height between the sliding plate 36 and the core member 38 is 1 mm. first gap d ₁ degree is formed. The spacer member 37 has a role of clearance adjustment member for holding the first width of the gap d ₁ described above.

The outer diameter of the core member 38 is smaller than the inner diameter of the container 31, and a space is opened around the core member 38 disposed in the center of the container 31. A thick cylindrical second damping material 39 is inserted inside the container 31 so as to fill most of the space around the core member 38, and a ring plate-shaped third damping material is placed on the core member 38. A (upper vibration damping material) 40 and a ring plate-like deterrent plate (metal washer plate) 41 are stacked. Further, a second gap d ₂ having a height of about 1 mm is formed between the upper surface of the suppression plate 41 and the lower surface of the lid plate 31.
The second attenuating member 39 is disposed so as to contact the inner peripheral surface of the side wall 31B of the container 31, and a third gap d having a width of about 1 mm is provided between the second damping member 39 and the outer peripheral surface of the core member 38 accommodated therein. ₃ is formed.

  The core member 38 has a thick cylindrical shape, and is formed with a screw hole 38A penetrating vertically through the center thereof, and a support shaft 32 made of a screw shaft is screwed into the screw hole 38A. The support shaft 32 is inserted through the opening 31g of the cover plate 31 and extends upward (outside) of the core member 38, and the upper end of the support shaft 32 extends to the bottom surface side of the frame member 12a. The mounting plate 33 has a ring shape made of a metal plate, and has a screw portion 33A formed on the inner peripheral side. The mounting plate 33 is integrated with the screw shaft 32 by screwing the screw portion 33A with the upper end portion of the support shaft 32. It has become. The mounting plate 33 is in contact with the lower surface side of the frame member 12a and is fixed by adhesion. Further, a reinforcing nut 43 is screwed into the front end side of the support shaft 32 and directly below the mounting plate 33, and the reinforcing nut 43 is integrated with the lower surface side of the mounting plate 33 by welding.

Further, an opening 31g is formed at the center of the cover plate 31C, and the support shaft 32 vertically penetrates the opening 31g. Therefore, the support shaft 32 has a width of about 10 mm as shown in FIG. fourth gap d ₄ is formed.
If, for example, polyacetal resin (POM) is used as a constituent material of the core member 38, it is hard and excellent in slipperiness, so that it is excellent in slidability with respect to the sliding plate 36 and excellent in slipperiness with the vibration reducing material. Further, since the polyacetal resin is hard, it has excellent vibration characteristics with respect to the vibration reducing material 39.

  In addition, a through hole 31f is formed in a part of the side wall 31B, a through hole 39f that penetrates the second attenuation member 39 is formed inside the through hole 31f, and the outer side of the core member 38 is formed inside the through hole 39f. A positioning hole 38f extending from the side surface to the vicinity of the screw hole 38A is formed. The through holes 31f and 39f and the positioning hole 38f are linearly arranged from the outer peripheral portion of the container 31 toward the center thereof, and a positioning pin 45 that is inserted into the positioning hole 38f through the through holes 31f and 39f is provided. ing. The positioning pin 45 is provided to prevent the core member 38 from spinning around when the unit-type vibration damping device 30 is mounted.

The anti-seismic materials 35, 39, and 40 are members that exhibit an anti-seismic action.
The material constituting these vibration-absorbing materials 35, 39, and 40 is preferably a low-repulsion, high-attenuation, and viscous material. For example, TPE thermoplastic elastomer (olefin-based or styrene-based material) A material that can withstand a large shear deformation strain with an elongation of 400% or more is preferable. Furthermore, a TPE thermoplastic elastomer is advantageous because it has excellent weather resistance and little environmental aging.
Since these materials have viscoelastic properties, vibration calculation is easy, and because molded products with a desired shape can be easily mass-produced by an injection molding method or the like, there is an advantage of contributing to cost reduction. is there. Further, in the case of a TPE thermoplastic elastomer, tan δ (loss factor) is about 0.5, and an excellent seismic reduction effect can be obtained.

As a material constituting the core member 38, a resin material having a small friction coefficient and excellent sliding characteristics can be used as a sliding material, such as polytetrafluoroethylene resin, MC nylon sliding grade product, polyacetal (POM), and the like. . For example, as a polyacetal resin, Rockwell hardness: M80, Poisson's ratio: 0.35, density γ: 1.4 g / cm ³ , moisture absorption: 0 to 0.29%, flame retardancy: HB, linear expansion coefficient: 10 ^{− Since} it is about ⁴ / ° C. and has sufficiently excellent characteristics such as impact strength and strength, it is suitable as a constituent material of the core member 38.

FIG. 2 shows a state in which the positioning pin 45 is inserted into the positioning hole 38f of the core member 38 and the core member 38 is prevented from rotating, and the spacer member 37 is inserted between the sliding plate 36 and the core member 38 to be the first. It shows a state where the gap d ₁ is formed. The unit-type vibration damping device 30 is used in a state in which the positioning pin 45 is extracted from the container 31 and the spacer member 37 is extracted from the container 31 in the use state. That is, the unit type vibration damping device 30 is used in a state where the positioning pin 45 and the spacer member 37 are removed from the state shown in FIG.

  In the vibration isolator 1 equipped with the unit type vibration damping device 30 having the above-described configuration, equipment such as a generator and a transformer are installed on the first stand 12. Since the vibration isolator 1 having the above-described configuration elastically supports the first frame 12 on the second frame 14 by the six vibration isolation members 16, the equipment installed on the first frame 12 generates. Vibration can be absorbed and buffered. In consideration of the position of the center of gravity of the equipment installed on the first mount 12, it is preferable to install a plurality of vibration isolation members 16 at appropriate positions between the second mount 14 and the first mount 12.

In the unit type vibration damping device 30 supporting the first gantry 12, when the support shaft 32 tries to move in the horizontal direction due to the horizontal movement of the first gantry 12, the core member 38 becomes the second damping member 39. until the contact with, i.e., a third while the range of the gap d ₃ core member 38 is moved in the unit type, down Isolation system 30 does not affect the movement of the first frame 12. For this reason, the unit type vibration isolator 30 does not affect the function of the vibration isolation member 16 to absorb and buffer the vibration during operation of the equipment installed on the first mount 12. Further, when the vertical vibration of the equipment is transmitted to the first gantry 12, the core member 38 moves up and down as the first gantry 12 moves up and down, but the first gap d ₁ is below the core member 38. provided, since above the suppression plate 41 second gap d ₂ is provided to absorb the vertical direction vibration damping member 16 of a running equipment, unit type, down Isolation system to function to cushion 30 has no effect.

Next, it is conceivable that facility equipment vibrates with a large amplitude in the horizontal and vertical directions due to the addition of external vibration, such as the effects of earthquake vibration and wind pressure.
If resulted in large horizontal vibrations in equipment due ground motion, since the core member 38 collides with the second damping member 39 beyond the third gap d _3, the vibration of the horizontal direction of the second damping The material 39 is suppressed, and a large horizontal vibration can be reduced.

When large vibrations in the vertical direction are generated in the equipment due to earthquake motion, the core member 38 collides with the sliding material 36 with respect to the downward vibration, and the first damping material 35 obtains a buffering action, and the upward vibration On the other hand, since the restraining plate 41 collides with the cover plate 31C and the buffering action can be obtained by the third damping member 40, the vibration can be reduced against a large vibration in the vertical direction. In addition, since the restraining plate 41 is configured to be prevented from being detached by the lid plate 31C, the lid plate 31C of the unit-type seismic reduction device 30 can withstand the pulling force even if the force for pulling the support shaft 32 is increased due to seismic motion or the like. be able to.
When the core member 38 collides with the sliding material 36 in response to the downward vibration of the first mount 12, the core member 38 can slide in the horizontal direction along the upper surface of the sliding material 36, and the vertical movement and the horizontal direction can be performed in the first direction. Since the core member 38 is pressed against any one or a plurality of the anti-seismic materials 35, 39, and 40 when the gantry 12 moves, the anti-seismic effect by these anti-vibration materials 35, 39, and 40 can be obtained.

  Moreover, normal seismic motion is greater in horizontal motion than in vertical motion. Therefore, if the horizontal movement (horizontal force F) is reduced, the drawing compression force due to the overturning moment (M = horizontal force F × center of gravity height L) of the equipment mounted on the anti-vibration mount can be reduced. For this reason, the vibration isolator 1 according to the present embodiment provides a sufficient seismic reduction effect by reducing the horizontal motion by providing a plurality of unit-type vibration damping devices 30.

The unit type vibration damping device 30 of the present embodiment has a configuration in which the first frame 12 and the second frame 14 and the vibration isolation member 16 are interposed between them, and does not include the unit type vibration damping device 30. This is a device that can be retrofitted after installation by attaching a necessary number of unit-type vibration damping devices 30 between the first frame 12 and the second frame 14 with respect to a known existing vibration isolation frame.
In order to attach the unit-type vibration isolator 30 to an existing vibration isolation frame that does not include the unit-type vibration absorber 30, the support shaft 32 is screwed into the screw hole 38 </ b> A of the core member 38 to the back, and the mounting plate 33. The unit 31 is inserted between the first frame 12 and the second frame 14, and then the mounting plate 33 is rotated so that the support shaft 32 is attached to the core member 38. Extend outward.
An adhesive layer is formed on the upper surface side of the mounting plate 33 and the bottom surface side of the bottom wall 31 </ b> A, the support shaft 32 is extended to press the mounting plate 33 against the bottom surface of the first frame 12, and the upper surface of the second frame 14 is pressed. By solidifying the adhesive layer in a state where the bottom wall 31A is pressed, the unit type vibration damping device 30 can be easily and reliably attached to the existing vibration isolator.

When rotating the mounting plate 33, if the positioning pin 45 is inserted into the positioning hole 38 f of the core member 38, the idle rotation of the support shaft 32 can be prevented. Since the core member 38 is made of a hard resin having good sliding properties, the core member 38 idles inside the housing 31 when the positioning pin 45 is not inserted.
Further, if the reinforcing nut 43 is integrated on the back surface side of the mounting plate 33, a tool such as a spanner can be locked on the reinforcing nut 43 and the support shaft 32 can be easily rotated. The unit-type seismic reduction device 30 can be installed after easily adjusting the pressing force of the mounting plate 33 against and the pressing force of the bottom wall 31A against the second gantry 14 to appropriate values.
If the adhesive fixing of the adhesive layer is solidified unit type down Isolation System 30 is completed, it is possible to define a first gap d ₁ by pulling out the positioning pin 45 and the spacer member 37 from the container 31, the existing anti The installation of the unit type vibration damping device 30 can be completed on the shaking rack.

In addition, if the separation wall 31D is screwed in the container 31, assembly can be easily performed when the unit-type vibration damping device 30 is assembled.
For example, the separation wall 31D and the cover plate 31C are removed to open the upper surface side of the container 31, and the first vibration reducing material 35, the sliding material 36, the second vibration reducing material 39, The core member 38 is inserted, the third anti-vibration member 40 and the restraining plate 41 are mounted, the separation wall 31D is screwed, the housing 31 is formed, and the support shaft 32 including the mounting plate 33 is attached to the screw of the core member 38. The unit-type vibration damping device 30 can be assembled by screwing into the hole 38A. In addition, it forms a first gap d ₁ between the slide plate 36 and the core member 38 by inserting the spacer member 37 inside the container 31 through the bottom insertion hole 31e, the through-hole 31f, through 39f Then, the core member 38 can be positioned by inserting the positioning pin 45 into the positioning hole 38f.

By simply attaching the unit type vibration damping device 30 as described above, it is possible to easily impart a vibration damping effect to the existing vibration isolation frame by retrofitting.
In addition, existing anti-vibration mounts are often installed in places where equipment such as generators and transformers are installed without gaps, or in a narrow position close to the wall. It is necessary to perform the installation work of the unit-type vibration isolator 30. Even in such a case, it is possible to attach the unit type vibration damping device 30 by simply inserting the unit type vibration damping device 30 between the upper and lower frames, rotating the support shaft 32, and bonding the container 31 and the mounting plate 33 together. Easy installation and excellent workability during installation.

For example, the unit type vibration damping device 30 applied to the present embodiment can be provided at a ratio of about 1 to 1 t of the weight of the equipment. If the equipment is a generator and a 400 kW class generator, 6 t. Since the weight is of the order, about six unit-type vibration damping devices 30 can be installed on the anti-vibration mount 1 to cope with it. In the case of this structure, the first to third gaps d ₁ , d ₂ , d ₃ may be about 1 mm, and can be set within a displacement limit of 10 mm as a numerical target. Practically, vibration of seismic intensity VII class can be reduced to vibration of seismic intensity V class.
In addition, when the support shaft 32 of the unit type seismic reduction device 30 rises due to vibration such as an earthquake, and the restraint plate 41 comes into contact with the cover plate 31C to generate a pulling force, the cover plate 31C has a thickness that can withstand this pulling force. is necessary. When the cover plate 31C is made of a steel plate, if it has a thickness of about 4 to 6 mm, sufficient strength can be obtained with respect to the pulling force generated in terms of the weight of the equipment. Further, in the case of the weight conversion described above, it is possible to use a high-strength bolt having an outer diameter of about 24 M24 as the support shaft 32.

4 and 5 show a unit-type seismic reduction for a structure in which equipment 52 is installed on a general frame-like gantry 50 that does not have the first gantry 12, the second gantry 14, the vibration isolation member 16, and the like. An embodiment to which the device 30 is applied is shown.
In this embodiment, a frame 50 is assembled in a rectangular frame shape from a steel material having a C-shaped cross section, and the frame-shaped frame 50 is horizontally placed on an installation surface of a floor slab 53 such as a floor via an anti-vibration pad 55 made of an elastic member. is set up.
In order to apply the unit type vibration damping device 30 to the gantry 50 having this structure, a connection piece 56 made of a metal plate is attached to a part of the gantry 50 by means of welding or screwing, and the distal end side of the connection piece 56 Further, a horizontal member 58 made of a metal plate is attached by means of welding or screwing through a rib member 57 made of a metal plate. The rib member 57 extends to the outside of the gantry 50, and a horizontal member 58 is attached to the tip end side of the rib member 57.

As shown in FIG. 4, the unit-type vibration damping device 30 described in the previous embodiment is installed between the horizontal member 58 and the floor slab 53.
In the unit type vibration damping device 30 applied to this embodiment, the metal plate 59 constituting the bottom wall 31A of the container 31 is formed slightly larger than the structure of the previous embodiment, and the metal plate 59 is a floor. The plate 53 is fixed by attachment means such as a bolt. A mounting plate 33 attached to the upper end of the support shaft 32 is placed along the lower surface of the horizontal member 58 and integrated by bolting.

4 and 5 show only one unit type vibration isolator 30 installed on the gantry 50, but in actuality, the steel materials constituting the gantry 50 are respectively disposed at appropriate positions in the longitudinal direction. The connection piece 56, the rib material 57, and the horizontal material 58 can be provided, and the unit type vibration damping device 30 can be provided.
The number of unit-type seismic reduction devices 30 provided on the gantry 50 may be any number, and the necessary number is provided according to the seismic performance required in the range of about 4 to 10 or more depending on the scale and size of the gantry 50. It is preferable.

In the structure shown in FIGS. 4 and 5, when a large vibration is generated in the equipment due to wind force or earthquake motion, the vibration is transmitted to the unit-type seismic reduction device 30 via the connection piece 56, the rib member 57, and the horizontal member 58. Is done. In the unit-type vibration damping device 30, a first vibration damping material 35, a second vibration damping material 39, and a third vibration damping material 40 are provided around a core member 38 provided on the lower end side of the support shaft 32. Therefore, the large vibration in the vertical direction can be attenuated by the first vibration reducing material 35 and the third vibration reducing material 40 via the core member 38, and the large horizontal vibration can be reduced by the second vibration reducing material. 39 can reduce the vibration through the core member 38.
In addition, the effect which the unit type seismic reduction device 30 demonstrated in 1st Embodiment can show | play similarly can also be obtained in the unit type seismic reduction device 30 of this embodiment, and the seismic effect is obtained with respect to the equipment 52. be able to.

By the way, in embodiment mentioned above, the unit type seismic-reduction apparatus 30 was installed between the upper mount frame 12 and the lower mount frame 14 with the attachment board 33 up and the bottom wall 31A of the container 31 positioned down. However, the upper and lower sides of the unit type vibration isolator 30 may be reversed. That is, the mounting plate 33 may be bonded to the lower frame 14, and the bottom wall 31 </ b> A of the container 31 may be bonded to the upper frame 12. Further, the unit-type vibration damping device 30 is not limited to the example in which the support shaft 32 is arranged in the vertical direction, and in the case of vibration reduction between the racks separated from each other on the left and right, the support shaft 32 is directed left and right, or It is also possible to arrange it diagonally according to the form of the base to be reduced.
Moreover, attachment of the unit type seismic reduction device 30 is not restricted to adhesion. Adhesion is easy when attaching the unit type vibration isolator 30 to an existing frame, but when attaching the unit type vibration absorber 30 to a new vibration isolation frame manufactured at a factory or the like, other methods such as bolting are used. It may be attached between the upper frame 12 and the lower frame 14.
In addition, the installation of the unit type seismic reduction device 30 is not limited to between the gantry like the upper gantry and the lower gantry. If it is placed between the slab and the floating floor, it can be applied to the floor support structure for the seismic attenuation structure. It can be applied not only to the floor but also to support structural materials such as deck plates.

DESCRIPTION OF SYMBOLS 1 ... Antivibration mount frame, 12 ... Upper mount frame (1st mount frame), 12a ... Frame member, 14 ... Lower mount frame (2nd mount frame), 14a ... Frame member, 16 ... Anti-vibration member, 18 ... Floor slab, 20 ... Reserve Stopper structure, 30 ... unit-type vibration damping device, 31 ... container, 31A ... bottom wall, 31B ... side wall, 31C ... lid plate (ceiling wall), 31e ... bottom insertion hole, 31f ... through hole, 31g ... opening, 32 ... Support shaft, 33 ... Mounting plate, 38 ... Core member, 35 ... First vibration reducing material (bottom vibration reducing material), 36 ... Sliding material, 37 ... Spacer member, 38 ... Core member, 38A ... Screw hole, 38f ... positioning hole 39 ... second GenShinzai, 39f ... through hole, 40 ... third GenShinzai (upper GenShinzai), 41 ... inhibit plates, 45 ... positioning pins, d 1 _... first Gap, d ₂ ... second gap, d ₃ ... third gap, d ₄ ... fourth gap.

Claims (6)

  A housing body having a housing space, comprising a bottom wall, a side wall, and a lid plate, and having an opening in a central portion of the lid plate; a core member made of hard resin housed in the housing body; An anti-vibration material arranged around the core member and surrounding the core member inside the container, and an opening of the lid plate screwed into a screw hole formed in the center of the core member A unit-type seismic reduction device comprising: a support shaft that passes through the portion and extends outward from the cover plate; and a mounting plate that is integrated with a tip portion of the support shaft.   A bottom vibration reducing material is disposed between the bottom wall of the container and the core member, and a first gap is formed between the top surface of the bottom vibration reducing material and the bottom surface of the core member, and the core member 2. The unit type vibration damping device according to claim 1, wherein an upper vibration damping material and a deterrent plate are disposed on the upper surface of the dam plate, and a second gap is formed between the deterrent plate and the lid plate.   The unit mold according to claim 2, wherein a bottom insertion hole is formed in the bottom of the side wall of the container, and a spacer member is inserted in the first gap through the bottom insertion hole. Seismic reduction device.   A positioning hole is formed in a side surface of the core member, a through hole is formed in the side wall of the container and a vibration reducing material inside the container, and a positioning pin inserted through the through hole in the side wall and the through hole of the vibration reducing material. The unit-type vibration damping device according to claim 2 or 3, wherein the unit-type vibration damping device is inserted into the positioning hole so as to be freely extracted.   A lower pedestal installed on the floor slab, an upper pedestal installed on the lower pedestal with a space between them, and a plurality of equipment installed between the lower pedestal and the upper pedestal. An anti-vibration frame comprising a plurality of unit-type vibration damping devices according to any one of claims 1 to 4, wherein the anti-vibration member is interposed between the lower frame and the upper frame. .   6. The prevention according to claim 5, wherein a bottom wall of the unit type vibration isolator is bonded to an upper surface of the lower frame, and a mounting plate of the unit type vibration absorber is bonded to a lower surface of the upper frame. Shaking table.

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