JP2007315093A - Vibration restraining device such as for floor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration restraining device such as for a floor, easy in installation in a short time, and easy in a fine adjustment of an oscillation frequency. <P>SOLUTION: This vibration restraining device such as for the floor is arranged on the floor A and a beam, and restrains swinging of the floor, and has an installation base 1 arranged on the floor and the beam, a rocking base part 2 arranged on the installation base, a rocking lever 3 having a mass body 4 arranged on one end and having the other end rockingly connected to the rocking base part, an elastic body 5 movably arranged in its lengthwise direction along the rocking ever between the rocking lever and the installation base and elastically supporting the rocking lever on the installation base, a guide means 8 arranged between the elastic body and the rocking lever and guiding the movement of the elastic body, a solidification material 6 as an adjusting means arranged in the elastic body and adjusting a spring constant of the elastic body, and a frequency display means 9 arranged between the elastic body and the rocking lever and displaying the oscillation frequency determined by the spring constant and a moving position of the elastic body in response to the moving position of the elastic body. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an apparatus for suppressing vibration of a floor or the like. In particular, the present invention relates to a device that suppresses vertical vibration of a floor or a beam by being provided on the floor or the beam.

In buildings such as steel structures, vibration disturbances may occur on floors and beams due to vibrations from walking, equipment, and traffic vibrations. As countermeasures, increase the rigidity of the floor, etc. by adding column beams, improving the rigidity of the beam, and introducing tension to the floor slab at the design stage, or installing a dynamic vibration absorber that responds to vibration disturbances on the floor, etc. Some measures are taken to adjust the frequency of the dynamic vibration absorber.
Japanese Utility Model Publication No. 55-64542

  However, when such a vibration failure of the floor or beam occurs after the start of use of the building, measures to increase the rigidity of the floor or beam by adding structural members such as columns and beams or adding concrete to the slab or beam are not available. It is inconvenient for the tenants and is not realistic. Also, in the case of using a dynamic vibration absorber installed under the floor, the frequency adjustment of the device to adapt to the target vibration is handled by exchanging and adding springs, or changing the spring mounting position. However, it required time and labor to disassemble and reassemble the equipment.

  The present invention was devised in view of the above-described conventional problems, and provides a vibration suppressing device for a floor or the like that can be easily mounted in a short time and can easily finely adjust the vibration frequency. With the goal.

  A vibration suppression device for a floor or the like according to the present invention is a vibration suppression device for a floor or the like that is provided on the floor or beam and suppresses the shaking of the floor or the like, the mounting base provided on the floor or the beam, and on the mounting base A swing base provided at one end, a swing lever having a mass body provided at one end and the other end swingably connected to the swing base, and between the swing lever and the mounting base, An elastic body that is movable along the rocking lever in the length direction thereof, elastically supports the rocking lever on the mounting base, and is provided between the elastic body and the rocking lever. A guide means for guiding the movement of the elastic body; an adjustment means provided on the elastic body; for adjusting a spring constant of the elastic body; and provided between the elastic body and the swing lever. The vibration frequency determined by the spring constant and the moving position of the elastic body corresponds to the moving position of the elastic body. Characterized in that a frequency display means for displaying.

  The adjusting means is characterized in that the elastic body is a coil and is a solidified material for burying the elastic body in order to adjust the effective number of turns.

  While the scale which displays the embedding depth of the said elastic body is provided, the said frequency display means has a some frequency display scale according to each scale, It is characterized by the above-mentioned.

  In the vibration suppressing device such as a floor according to the present invention, the mounting is short and easy, and the natural frequency of the device can be easily finely adjusted.

  Hereinafter, a preferred embodiment of a vibration suppressing device for floors and the like according to the present invention will be described in detail with reference to the accompanying drawings. FIG. 1 is a plan view showing a preferred embodiment of a vibration suppressing device such as a floor according to the present invention. FIG. 2 is a side view of the vibration suppressing device such as a floor shown in FIG. FIG. 3 is an enlarged side view of the elastic body portion of FIG. 4 is a cross-sectional plan view of the elastic body portion shown in FIG.

  The vibration suppressing device for floors and the like according to the present embodiment (hereinafter referred to as “this device”) is basically placed horizontally in contact with the upper surface of the floor A as shown in FIGS. Mounting base 1, swing base 2 provided on mounting base 1, swing lever 3 having one end swingably attached to swing base 2, and attached to the other end of swing lever 3 Mass body 4 provided, elastic body 5 provided between swing lever 3 and mounting base 1, guide means 8 provided between elastic body 5 and swing lever 3, and movement of elastic body 5 The frequency display means 9 displays the vibration frequency in accordance with the position, and the solidified material 6 in which the elastic body 5 is buried is used as an adjustment means for adjusting the effective number of turns of the coiled elastic body 5.

  The mounting base 1 according to the present embodiment is formed of a rectangular plate member. The entire bottom surface of the mounting base 1 is fixed in contact with the floor A, the swing base portion 2 is provided on the top surface, and the elastic body 5 is movably provided.

  The mounting base 1 is a base as a device on which each component of the apparatus is placed, and at the same time is an input point for incorporating the vibration of the floor A into the apparatus. The “floor” in the present embodiment refers to a portion where a person can walk or place an object in a building, and is a concept that includes a stair landing, rooftop, beams, and the like.

  The swing base 2 in the present embodiment is a horizontally long member having a rectangular cross section, and its length is slightly shorter than the short side dimension of the mounting base 1. The swing base 2 is firmly fixed in close contact with the mounting base 1 in the center of a pair of long sides of the mounting base 1 in parallel along the short side of one end of the mounting base 1. Examples of fixing methods include bolts and nuts, adhesives, and welding. A swing lever 3 is connected to a corner of the upper surface of the swing base 2 on the center side of the mounting base 1. The height of the swing base 2 is set so that the mass body 4 attached to the swing lever 3 does not contact the mounting base 1 when the swing lever 3 swings. The basic function of the oscillating base 2 is to secure the connecting portion as a fulcrum for the oscillating lever 3 and to support the oscillating lever 3 at the connecting location.

  The swing lever 3 connected to the swing base 2 is a plate member having a rectangular outline in plan view, and the dimension of the long side 3 a is smaller than the dimension of the long side of the mounting base 1. The dimension of the short side 3 b is equal to the length of the swing base 2. The swing lever 3 has one short side 3 b connected to the corner portion of the swing base 2 so as to be swingable. The swing lever 3 is detachably connected to the swing base 2 inside the outer contour of the mounting base 1.

  “Swivelly connected” means that the swing lever 3 is connected in a state in which it can rotate in the vertical direction around the connection portion with the swing base 2. In the present embodiment, the lower corner portion of the end face of the short side 3b is a fulcrum (axis) of the rotational movement of the swing lever 3 (hereinafter, this lower corner portion is referred to as “fulcrum shaft 3B”). Although the coupling structure of the swing lever 3 and the swing base 2 is omitted in the drawing, the central position of the swing base 2 is set at the corner of the swing base 2 without obstructing the rotational motion of the swing lever 3. Anything that can be held is acceptable. In the present embodiment, there are a plurality of connecting points on the fulcrum shaft 3B of the swing lever 3 at positions symmetrical to the center line 3A in the direction of the long side 3a of the swing lever 3 (hereinafter referred to as “center line 3A”). Alternatively, one is set on the center line 3A.

  A mass body 4 is provided on the bottom surface in the vicinity of the short side 3 b at the other end of the swing lever 3. The mass of the mass body 4 is set to about 1 to 3 percent of the weight of the target floor A to suppress shaking. The mass body 4 is attached to the swing lever 3 in a detachable state so that the mass body 4 does not fall off or shift when swinging integrally with the swing lever 3. Note that the mass of the mass body 4 of the present device includes the mass of the mass body 4 mounting portion of the swing lever 3. The mass body 4 in the present embodiment is a horizontally long member having a rectangular cross section. The length of the mass body 4 is the same as the dimension of the short side 3b of the swing lever 3, and is attached to the bottom surface of the other end of the swing lever 3 in parallel with the short side 3b. Therefore, the center of gravity of the mass body 4 is located on the center line 3 </ b> A of the swing lever 3. As a result, the load from the mass body 4 acts equally on the entire rocking lever 3 that is a plate-like member, and the load is evenly distributed to each connecting portion of the rocking lever 3 and the rocking base 2. Therefore, the smoothness of the swing motion is ensured.

  As a specific method for attaching the mass body 4 to the rocking lever 3, there is a method in which a bolt is passed through the mass body 4 from the upper surface of the rocking lever 3 and nut-fixed on the lower surface of the mass body 4. The swing lever 3 is elastically supported by the elastic body 5 from the mounting base 1 between the swing base 2 and the mass body 4. Since the swing lever 3 is a rectangular plate-like member, a wide support range by the elastic body 5 can be secured on the bottom surface. The swing lever 3 has a strength and a rigidity that can be supported by the elastic body 5 between the fulcrum shaft 3 </ b> B and the mass body 4.

  The elastic body 5 includes a coil spring (hereinafter referred to as “spring”) 5a and receiving plates 5b and 5c attached to upper and lower ends thereof. The height of the spring 5a is desirably set to a dimension that is substantially the same as the swing base 2 in a state where the load of the swing lever 3 integrated with the mass body 4 is elastically supported. The elastic body 5 is provided between the mass body 4 and the swing base 2 with the upper receiving plate 5b in contact with the bottom surface of the swinging lever 3 and the lower receiving plate 5c in contact with the top surface of the mounting base 1. A rocking lever 3 is elastically supported on the mounting base 1.

  Various characteristics of the spring 5a include the natural frequency of the target floor A, the mass of the mass body 4 in this apparatus, the length of the rocking lever 3, the height of the rocking base 2, the standard support position of the elastic body 5, and the like. It is determined in consideration of the fact that the lower part of the mass body 4 does not come into contact with the mounting base 1 when swinging. In the present embodiment, the spring constant of the elastic body 5 means the spring constant of the spring 5 a constituting the elastic body 5. The spring constant is determined by the effective number of turns of the spring 5a.

  Each of the upper and lower receiving plates 5b and 5c has a square shape whose one side is longer than the outer diameter of the spring 5a. The lower receiving plate 5c has a weight that does not lift from the mounting base 1 when the spring 5a is extended. The lower receiving plate 5c may be different from the size of the upper receiving plate 5b.

  The elastic body 5 is provided so as to be movable in the length direction along the swing lever 3. In the present embodiment, “along the rocking lever 3” means within a range in contact with the bottom surface of the rocking lever 3. Since the elastic body 5 is only placed between the swing lever 3 and the mounting base 1, it can slide on the mounting base 1 by releasing the load from the swing lever 3. Yes, its mobility is ensured. The movement in the length direction means that the position of the elastic body 5 moves so that the length direction of the swing lever 3, that is, the position in the long side 3 a direction is changed, and is not necessarily “parallel” to the long side 3 a. It is not limited to the meaning of moving to, and even if it moves obliquely with respect to the long side 3a, it moves in the length direction.

  The elastic body 5 constitutes a vibration system by elastically supporting the swing lever 3 on the mounting base 1. The elastic support means that the elastic body 5 supports the load of the rocking lever 3 integrated with the mass body 4 on the mounting base 1 and, at the same time, when an external vibration is input to the apparatus, the elastic body 5 Means to support the swing lever 3 while repeating the compression and extension operations. Therefore, by elastically supporting the swing lever 3, the mass body 4 and the elastic body 3 as a vibration body are connected to form a vibration system. When vibration is input to the apparatus, the mass body 4 and the elastic body 5 generates vibration in the form of swinging of the swing lever 3.

  As an adjusting means for adjusting the spring constant of the elastic body 5, a solidified material 6 is used that embeds the spring 5 a and changes its effective winding number. The solidified material 6 finally becomes solid and has the strength to restrain the movement of the buried portion of the spring 5a. In this embodiment, an epoxy resin is used as the solidifying material 6, and the spring 5a is buried at an appropriate depth above the support plate 5c of the elastic body 5. A cylindrical member 7 is attached to the lower receiving plate 5c so as to surround the spring 5a and to be filled with epoxy resin in a liquid state. The solidifying material 6 is not limited to the epoxy resin. The embedding of the spring 5a with the solidifying material 6 means the embedding of the elastic body 5 with the solidifying material 6, and adjusts the spring constant of the elastic body 5.

In general, the spring constant of a coil spring is obtained by the following equation.

K = P / σ = (G · d ⁴ ) / (8N · D ³ )

K: Spring constant (N / mm), P: Load (N), σ: Deformation (mm), G: Stiffness of spring material (N / mm ² = Mpa), d: Wire diameter (mm) of spring 5a , N: number of effective turns, D: average coil diameter (mm)

  As the above formula shows, the spring constant is changed by changing the effective number of turns for the spring having the same average coil diameter made of the same material. Therefore, in this embodiment, with respect to the same spring 5a, a part of the effective number of windings is buried in the solidifying material 6, and the function as an elastic body of the buried part is constrained to reduce the number of effective windings. Thus, the spring constant can be increased. This makes it possible to adjust the spring constant without exchanging the elastic body 5, and eliminates the disassembly and assembly work of the apparatus for exchanging the elastic body 5.

  The cylindrical member 7 is a container used for filling a liquid epoxy resin. The cross section of the cylindrical member 7 in this embodiment has a donut-shaped double structure, and the wire constituting the spring 5a is accommodated between the cylindrical outer frame 7a and the cylindrical inner frame 7b. The space between the tubular material inner frame 7b and the tubular material outer frame 7a is such that the epoxy resin that has not yet solidified can flow between the wire material and the tubular material 7 in a state in which the wire material of the spring 5a is accommodated. . The cylindrical member 7 is made of a light transmissive member, and the filling state of the epoxy resin can be confirmed. The bottom surface of the cylindrical member 7 is also used as the lower receiving plate 5c. The height of the cylindrical member 7 is a dimension from the lower receiving plate 5c to the substantially central portion of the spring 5a, and the upper surface is open. The donut shape is used to save the injection amount of the epoxy resin and shorten the injection and solidification time.

  The cylinder outer frame 7a is provided with a scale 10 for displaying the depth at which the elastic body 5 is buried with epoxy resin. In the illustrated example, the effective winding number of the spring 5a is indicated by a symbol "A" in the burying depth of the first winding, and a symbol "B" is displayed in the burying depth of the second winding.

  Guide means 8 is provided between the swing lever 3 and the elastic body 5. The guide means 8 in this embodiment is composed of an arm portion 8 a and side edges of the long side 3 a of the swing lever 3. The arm portion 8a is an elongated plate-like member, and extends from the side surface of the upper receiving plate 5b of the elastic body 5 to both long sides 3a of the swing lever 3 along the bottom surface of the swing lever 3. It folds up to the upper side of the swing lever 3 along the side edge 3a, and the tip is folded back so as to wrap the swing lever 3. In order to facilitate the movement of the elastic body 5, a space is provided between the arm portion 8a and the bottom surface of the swing lever 3 and the side edge of the long side 3a. The movement of the elastic body 5 is to move on the mounting base 1 along the bottom surface of the swing lever 3.

  The guide means 8 has a function of keeping the moving direction of the elastic body 5 constant by using the side edge of the long side 3a of the swing lever 3 as a guide for the movement of the arm portion 8a accompanying the movement of the elastic body 5. ing. That is, the bent portion of the arm portion 8a enables parallel movement in the long side direction of the elastic body 5 guided by the side edge of the long side 3a, and up to the rising portions of both arm portions 8a extending from the elastic body 5. By making the lengths equal, the movement of the elastic body 5 on the center line 3A of the swing lever 3 is guided. Further, after the movement, the side edge of the long side 3 a functions to hold the position of the elastic body 5 when the swing lever 3 swings.

  The frequency display means 9 in the present embodiment includes a moving position display unit 9a and a frequency display scale 9b. The movement position display unit 9 a is formed by a chevron portion at the tip of the arm unit 8 a of the guide means 8. The movement position display unit 9a is opposed to the frequency display scale 9b with a predetermined interval on the upper surface of the swing lever 3.

  The movement position display unit 9a indicates the position of the elastic body 5 located on the center line 3A under the swing lever 3. The movement position display unit 9 a has a function of displaying the position of the elastic body 5 that cannot be directly confirmed from the upper part of the swing lever 3 on the upper surface of the swing lever 3. Here, the position of the elastic body 5 refers to the center position of the circular coil spring 5a, and the “movement position” refers to the distance L1 from the fulcrum shaft 3B to the elastic body 5.

  The frequency display scale 9b in the present embodiment is provided in the vicinity of the movement position display portion 9a on the upper surface of the swing lever 3, and is attached to the side of three scales parallel to the long side 3a of the swing lever 3. It consists of symbols “A” and “B”. These symbols “A” and “B” coincide with the symbols “A” and “B” of the scale 10 provided on the cylindrical outer frame 7a of the solidified material 6, and the scale 10 and the frequency display of the buried depth. The correspondence of the scale 9b is shown. Note that the frequency display scale 9b having no symbol corresponds to the case where the solidifying material 6 is not filled.

  The frequency display means 9 is determined from the moving position of the elastic body 5 indicated by the moving position display section 9a and the spring constant determined by the embedding depth of the elastic body 5 indicated by the scale 10 in the solidified material 6. The natural frequency is displayed on the frequency display scale 9b.

In general, the natural frequency of a vibration system is determined by the following calculation formula.

fn = (1 / 2π) × (L1 / L2) × √ (k / M)

fn: natural frequency, k: spring constant, M: mass, L1: distance from the fulcrum to the elastic body, L2: distance from the fulcrum to the center of gravity of the mass

  L1 in the above formula is a moving position of the elastic body 5 in the present embodiment, and L2 in the above formula is a distance from the fulcrum shaft 3B to the center of gravity of the mass body 4 in the present embodiment. The spring constant k in the above formula is the spring constant of the elastic body 5 in the present embodiment. Therefore, the natural frequency of the apparatus is determined by the moving position L1 of the elastic body 5 of the apparatus and the spring constant k of the elastic body 5, and the elastic body 5 is moved to change the moving position L1, and the solidified material 6 of the elastic body 5 is changed. It is possible to change the natural frequency of the present apparatus by changing the burial depth.

  The frequency display scale 9b is set corresponding to a range in which the natural frequency of the apparatus can be changed by changing two numerical values that define the natural frequency. The frequency display scale 9b is attached to the upper surface of the swing lever by aligning the numerical position of the frequency display scale 9b with the natural frequency value at the moving position of the elastic body 5 of the apparatus. Thereby, the instruction value to the frequency display scale 9b of the movement position display part 9a can be directly read as the natural frequency of this apparatus.

  As described above, since this apparatus has two means for adjusting the natural frequency, the distance L2 from the fulcrum shaft 3B to the center of gravity of the mass body 4 is short due to the installation space, and depends on the moving position L1 of the elastic body 5. Even when the natural frequency of the apparatus cannot be sufficiently adjusted, the natural frequency of the apparatus can be adjusted by using the adjustment by the solidifying material 6 together, and the apparatus can be made compact.

  Next, the operation of the vibration suppressing device such as a floor according to the present embodiment will be described. Prior to the installation of this device, a pre-investigation is performed to confirm the natural frequency of the floor A where the vibration disturbance has occurred. Specifically, a vibration meter is installed on the target floor A, and the natural frequency of the target floor A is measured.

  At the assembly stage of this apparatus, the upper and lower receiving plates 5b and 5c are attached to the spring 5a to form the elastic body 5. At this time, the cylindrical member 7 is also attached to the lower receiving plate 5c so that the spring constant of the spring 5a can be adjusted. Prior to solidification at the installation site, solidification can be performed at this stage as a preliminary adjustment of the spring constant.

  In the assembly, the swing base 2, the swing lever 3, the mass body 4, the elastic body 5, the guide means 8, and the frequency display means 9 are mounted on one mounting base 1, and the apparatus is assembled as a compact unit. In the assembly stage, pre-adjustment of the mounting position of the elastic body 5 and the spring constant is performed based on the result of the preliminary investigation.

  Thereafter, the unitized apparatus is carried into the installation place and attached to a predetermined position. The mounting is performed almost horizontally so that the entire bottom surface of the mounting base 1 is in direct contact with the floor A where vibration is a problem. Since the weight of the device itself and the mounting base 1 are plate-like members, the device can be stabilized simply by placing it on the floor A. Since this apparatus is unitized as a unit with the mounting base 1 in a state where there is no portion protruding from the outer contour of the mounting base 1, it can be installed as long as a space for placing the mounting base 1 can be secured. Therefore, it is easy to confirm the installation space at the installation location, the installation work is only a simple work of placing the apparatus on the floor A, and the installation can be performed in a short time and easily even in an existing building.

  Next, measurement is performed to confirm the vibration suppression effect of the apparatus. If fine adjustment is required after installation, if the adjustment of the moving position (length of L1) of the elastic body 5 is sufficient, the natural frequency of the apparatus is adjusted by moving the position of the elastic body 5, and the floor A It can be tuned to the natural frequency.

  The moving work is performed by inserting a temporary jack between the swing lever 3 and the mounting base 1, lifting the swing lever 3, releasing the load, and allowing the elastic body 5 to move. Change the position of. In this moving operation, the elastic body 5 can be moved by the guiding means 8 without largely deviating from the center line 3A that is first installed. Since the swing lever 3 has a planar shape and is widened, the support of the swing lever 3 by the elastic body 5 is easily ensured, and the moving operation at the installation site is easy to perform. Further, since the moving position of the elastic body 5 under the rocking lever 3 can be confirmed on the upper surface of the rocking lever 3 by the frequency display means 9, the work can be performed while confirming the moving direction and the moving position. Since the natural frequency of the apparatus can be easily grasped from the moving position, fine adjustment of the apparatus is facilitated.

  When the fine adjustment at this stage cannot be handled by the movement of the elastic body 5, the frequency is adjusted by combining the change of the spring constant due to the embedding of the elastic body 5 in the solidified material 6. The spring constant of the elastic body 5 is changed by filling the cylindrical material 7 with epoxy resin as the solidifying material 6 provided in advance around the spring 5a of the elastic body 5 and burying the effective winding number of the spring 5a in the solidifying material 6. To do.

  First, an epoxy resin is injected from the upper surface of the cylinder member 7, and a predetermined effective winding number is buried in the epoxy resin. The epoxy resin is poured by a hose from the side of the apparatus to the cylindrical member 7 below the swing lever 3 without lifting the swing lever 3. Since the elastic body 5 is placed on the mounting base 1 in a substantially horizontal stable state by the lower plate 5c, the injection of the epoxy resin into the cylindrical member 7 is simply a work that is poured from above. Since the cylindrical outer frame 7a is transparent, the work can be performed while checking the filling state of the epoxy resin, the position of the upper surface, and the levelness. The burial depth of the elastic body 5 under the rocking lever 3 can be confirmed relatively easily by the scale 10 provided on the cylindrical outer frame 7a. Further, the liquid epoxy resin naturally flows between the windings of the spring 5a, and the upper surface of the epoxy resin is naturally leveled. For this reason, even if it does not perform a special operation, it is possible to ensure a uniform buried depth and to fill without gaps. If an epoxy resin with a short curing time is used, the overall work time can be shortened.

  Thus, it is possible to adjust the natural frequency of the apparatus without disassembling and assembling the apparatus for replacing the elastic body 5 at the installation site. By the frequency display means 9, it is not necessary to determine the adjustment amount by calculation or the like at the installation place, and adjustment can be performed in a short time. In the present embodiment, since the elastic body 5 is embedded in the epoxy resin up to the scale “A” 10, the value of the frequency display scale 9b of “A” is read as the natural frequency of this apparatus. Other adjustment procedures are as described above.

  In the vibration suppressing device for a floor and the like according to the present embodiment described above, the mounting base 1 installed on the floor A, the swing base 2 provided on the mounting base 1, and the mass body 4 are at one end. Between the swing lever 3 and the mounting base 1 in the length direction along the swing lever 3. The swing lever 3 is pivotally connected to the swing base 2 at the other end. An elastic body 5 that is movably provided and elastically supports the rocking lever 3 on the mounting base 1 to form a vibration system, and is provided between the elastic body 5 and the rocking lever 3. Are provided between the elastic body 5 and the swing lever 3, and are provided on the elastic body 5 and the adjusting means for adjusting the spring constant of the elastic body 5. Frequency display means 9 for displaying the vibration frequency determined by the movement position in correspondence with the movement position of the elastic body 5. Each member on the mounting base 1 is formed by the present apparatus is unitized integrally attached, mounted to the installation site is short and easy. Furthermore, since it is possible to use both the movement of the elastic body 5 and the change of the spring constant of the elastic body 5 as frequency adjusting means, and the frequency display means 9 can directly read the frequency from the moving position, etc. Fine adjustment of the natural frequency can be easily performed in a short time, and appropriate and efficient floor vibration suppression can be realized.

  In order to adjust the effective number of windings of the elastic body 5, the solidifying material 6 in which the elastic body 5 is embedded is used. Therefore, the spring constant of the elastic body 5 can be easily changed, and the apparatus can be installed at the installation location of the apparatus. Therefore, the natural frequency can be finely adjusted without disassembling and assembling, and floor vibration can be easily suppressed in a short time.

  Since the scale 10 for displaying the buried depth of the elastic body 5 is provided on the outer cylindrical member 7 a of the solidified material 6, and a plurality of frequency display scales 9 b corresponding to each scale 10 are provided, the spring of the elastic body 5 by the solidified material 6 Even when the constant is changed, the natural frequency of the apparatus can be easily read directly on the upper surface of the swing lever 3, and the natural frequency of the apparatus can be adjusted by changing the moving position of the elastic body 5 and the spring constant of the elastic body 5. It becomes a continuous and integrated operation, and the adjustment of the natural frequency of the apparatus at the installation location is made efficient, and appropriate floor vibration suppression can be realized in a short time.

  The present embodiment is not limited to the above form, and the following forms are also possible. In this embodiment, although the form which installs this apparatus on a floor was demonstrated, you may provide not only on a floor but on the floor, on a beam, and under a beam. When installing under the floor or under the beam, install a steel frame on the lower surface of the slab or beam and install this device on the steel frame, or support bolts by opening bolt holes at the four corners of the mounting base 1 of this device. You may support from a floor or a beam with a member. In this case, consideration is given to rigidity and attachment so that the steel frame and the support member do not constitute a new vibration system.

  The mounting base 1 in the present embodiment is not limited to a rectangle but may be a flat plate shape as long as the elastic body 5 and the swing base 2 of the apparatus can be installed. The shape of the oscillating base 2 may be a cylinder, a truncated cone, a convex shape, or the like, and its height may be variable. The swing lever 3 in the present embodiment may be a rigid member such as an iron plate having a sufficient thickness, a honeycomb structure plate, or a structure in which an iron plate or the like is stretched on the upper and lower surfaces of a three-dimensional truss frame. Moreover, it does not have to be a rectangular plane, and has a shape that has a fulcrum shaft 3 </ b> B and a side edge of the guide means 8 in a direction perpendicular to the fulcrum shaft 3 </ b> B, and has an extension in a range where elastic support from the elastic body 5 is received. That's fine. The predetermined mass body 4 may be configured by dividing the mass body 4 in the present embodiment and combining a plurality of mass bodies 4 having different weights.

  Although the coil spring 5a is used for the elastic body 5 in this embodiment, it is not limited to this, The elastic body 5 is made of natural rubber or the like, viscoelastic material, high damping rubber or the like. It is good. In addition, a rubber columnar body or a plastic columnar body may be used. An alternative to the coil spring 5a only needs to be able to elastically support the swing lever 3 and to adjust the spring constant by restraining the deformation thereof. For example, when natural rubber or viscoelastic material is used as the elastic material, the deformation in the lateral direction when compressed is restrained using the solidified material 6 and the cylindrical material 7, so that the spring constant of the elastic body 5 is obtained. Can be changed. Even in the form of a columnar body, a part of the columnar body is buried in the solidified material 6, and the function as an elastic body is reduced by constraining the function of the buried portion as an elastic body, thereby increasing the spring constant. I can do it.

  Further, a damper device may be provided between the swing lever 3 and the mounting base 1. The guide means 8 does not need to be provided for both long sides 3a of the swing lever 3, and can be provided only for one long side 3a. The arm portion 8a of the guiding means 8 and the movement position display portion 9a may be configured as separate members. The embedded position of the elastic body 5 in this embodiment is not limited to the lower part of the spring 5a, but may be an intermediate part or an upper part, and the lower receiving plate 5b and the upper receiving plate 5c may be embedded together.

  The tubular member 7 only needs to be able to confirm the inside of the tubular member outer frame 7a, and only a part thereof may have light transmittance. Even when the cylinder 7 is not transparent, a connecting pipe may be provided on the cylinder 7 and the filling level may be confirmed by the communication pipe. Further, the cylindrical member 7 is not limited to a circular shape, and may be any material that can accommodate the spring 5a. A plurality of scales 10 of the tubular material outer frame 7a may be provided on the tubular material outer frame 7a so as to be easily confirmed. A connecting port of a hose for injecting an epoxy resin may be provided on the lower side surface of the tubular material outer frame 7a and injected from below. The frequency display scale 9b is provided only in the vicinity of one movement position display unit 9a, but may be provided in the vicinity of the other movement position display unit 9a.

It is a top view which shows suitable one Embodiment of vibration suppression apparatuses, such as a floor concerning this invention. It is a side view of vibration suppression apparatuses, such as a floor shown in FIG. FIG. 3 is an enlarged side view of an elastic body portion in FIG. 2. FIG. 4 is a plan sectional view of the elastic body portion shown in FIG. 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mounting base 2 Oscillation base 3 Oscillation lever 4 Mass body 5 Elastic body 6 Solidification material 8 Guide means 9 Frequency display means 10 Scale

Claims (3)

  A vibration suppressing device for a floor or the like, which is provided on the floor or beam and suppresses the vibration of the floor or the like, and includes a mounting base provided on the floor or beam, a swing base provided on the mounting base, and a mass body. A swing lever provided at one end and the other end swingably connected to the swing base, and between the swing lever and the mounting base in the length direction along the swing lever. An elastic body that is movably provided and elastically supports the rocking lever on the mounting base; and a guide means that is provided between the elastic body and the rocking lever and guides the movement of the elastic body; A vibration frequency that is provided on the elastic body and is provided between the elastic body and the swing lever, and is determined by the spring constant of the elastic body and the moving position. Frequency display means for displaying the position corresponding to the moving position of the elastic body. Vibration suppressing device such as a floor, characterized in.   2. The vibration suppressing device for a floor or the like according to claim 1, wherein the adjusting means is a solidified material in which the elastic body is coiled and the elastic body is buried in order to adjust the effective number of turns.   The scale for displaying the embedding depth of the elastic body is provided, and the frequency display means has a plurality of frequency display scales corresponding to each scale. apparatus.

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