JP2006342879A - Thinned damping device and damping system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple thinned damping device that can easily be installed at a small and narrow installation place, is improved in damping performance, and can adjust the number of peculiar vibration and a damping force. <P>SOLUTION: The thinned damping device 20 comprises: a square frame-shaped thinned base frame 1 installed on an OA floor or the like; a fixed measure constituted of square columnar bodies 2, 2 rotatably supported at their one-end sides by a torsion shaft 7 supported by a bearing 5 on the base frame 1, and a plate body 2a attached to the square columnar bodies 2, 2; a tuning measure 3 with its installation position adjustable with respect to the plate body 2a of the fixed measure; an elastic damper 4 with its installation position adjustable between the base frame 1 and the square columnar body 2; and a coil spring 9 with is elastic force adjustable and detachable between the other end lower part of the plate body 2a and the base frame 1. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a thin vibration damping device and a vibration damping system, and more specifically, it is possible to reduce vibrations acting on a vibration suppression target location by simple construction that is simply placed in a narrow space below the vibration suppression target location such as an OA floor. The present invention relates to a thin vibration damping device that can be used and a vibration damping system that uses the thin vibration damping device.

  For example, in an OA floor or the like, floor vibration that occurs when walking or operating OA equipment may be a problem. In such a case, it is usual to arrange a vibration control device under the floor of the OA floor and take measures to prevent floor vibration.

  Most conventional vibration control devices used as floor vibration prevention measures are installed using beams under the floor. Moreover, for example, in the case of the floor of a general office building, about 1 to 2 tons per span is required, so the size is very large and heavy equipment is required for installation. There were also major construction problems such as

For example, if a vibration problem occurs after construction of a building, a large-scale work is required to remove structures such as ceilings and lift heavy objects, which is a heavy burden in terms of scale and cost. .
As described above, it is not practical to install the vibration control device after construction because a large-scale remodeling work is required.

  On the other hand, even during the construction of a newly built office building, the labor and cost for installing the vibration control device are considerable, and the process may be affected.

  In Patent Document 1, a plurality of spring members are extended from a common support member, weights are respectively attached to the tips of the plurality of spring members, and these are swingably supported. Further, the swinging of the weights is attenuated. There has been proposed a dynamic vibration absorber configured by attaching a damping member.

  However, in the case of this Patent Document 1, calculation of the spring constant of the spring member, the weight of the weight and the damping coefficient of the damping member that are optimal for various installation target locations, and the design and production of these elements are complicated. It includes the problem of becoming.

Non-Patent Document 1 discloses a vibration damping device that fits within an OA floor and is configured with a height of about 60 mm by combining a leaf spring, a coil spring, and an oil damper.
That is, this vibration damping device adjusts the natural frequency by supporting the vibration mass with four coil springs and changing the number of leaf springs. The vibration is attenuated by inserting a resistance plate into a viscous body such as silicon oil of the oil damper.

However, in the case of the vibration damping device disclosed in Non-Patent Document 1, the damping force is usually adjusted by moving the resistance plate up and down and changing the contact area with the viscous body. It is difficult to adjust the damping force because it cannot move up and down, and because a viscous material is used to attenuate vibration, there is a risk of liquid leakage when tilting or transporting, poor handling, natural frequency The natural frequency can be adjusted only in stages because of the adjustment of the number of leaf springs. In addition, because the structure is composed of overlapping leaf springs, friction is generated between the leaf springs, resulting in reduced performance. The problem of doing is included.
JP-A-9-119417 November 2004 issue of building technology "Correspondence example by vibration control device"

  Conventionally, there is no damping device that can be easily (simplely) installed in a narrow installation location and location, has good handling properties, excellent vibration damping capability, and simple adjustment of natural frequency and damping force.

  The present invention provides a thin vibration damping device, a thin base frame installed at a vibration suppression target location, a fixed mass whose one end is rotatably supported by a torsion shaft supported by a bearing on the base frame, The main feature is that it has a tuning mass attached to the fixed mass so that the attachment position can be adjusted, and a viscoelastic damper attached to the base frame and the fixed mass so that the attachment position can be adjusted. .

The present invention has the following effects.
According to the first aspect of the present invention, the vibration is suppressed when the vibration is generated by the fixed mass and the tuning mass which are rotatably supported at one end side by the torsion shaft by being installed in a thin and narrow space where the vibration is to be controlled. A device for performing can be provided.
Conventionally, a large amount of labor has been required for adjusting the natural frequency at the time of delivery, but the natural frequency can be easily adjusted by adjusting the mounting position of the tuning mass.
It is possible to provide a thin vibration damping device that exhibits a damping action and can be easily adjusted by a viscoelastic damper that is attached so that its attachment position can be adjusted.

  According to the invention described in claim 2, in addition to the effect of the invention described in claim 1, since the elastic body is provided between the lower end of the other end of the fixed mass and the base frame, the adjustment range of the natural frequency can be reduced. A thin damping device that can be expanded can be provided.

  According to a third aspect of the present invention, there is provided a thin vibration damping device having the same effect as that of the second aspect of the present invention in a configuration in which a pair of prismatic bodies and a plate body are used as a fixed mass, and a tuning mass is attached to the plate body. Can be provided.

  According to the fourth aspect of the present invention, in the thin vibration damping device of each of the above-described inventions, the torsion shaft is adjusted by the clamp mechanism provided on the bearing, and the inclination of the fixed mass supported by the torsion shaft can be easily adjusted. It becomes possible.

  According to the fifth to eighth aspects of the present invention, the thin vibration damping device of each of the above-described inventions is arranged in the required number of rows in the vibration suppression target portion, thereby using the thin vibration damping device of the first to third aspects. Each vibration suppression system with a large weight resistance at the target location can be constructed. In this case, the inclination of the fixed mass supported by the torsion shaft can be easily adjusted by adjusting the torsion shaft with a clamp mechanism provided on the bearing.

  The object of the present invention is to provide a thin damping device that can be easily installed in a narrow installation location, has good handling properties, has excellent damping capability, and has simple adjustment of natural frequency and damping force. A rectangular frame-shaped thin base frame installed at a location, a pair of prisms whose one ends are rotatably supported by a pair of torsion shafts supported by a pair of bearings on the base frame, and the pair A fixed mass composed of a flat rectangular plate-like plate attached to a prismatic body, a tuning mass attached so that the attachment position can be adjusted with respect to the plate in the fixed mass, the base frame, and a pair of fixed masses The elastic force can be adjusted between the viscoelastic damper attached to the prism body so that the attachment position can be adjusted, and the lower end of the other end of the plate body and the other end of the base frame in the fixed mass. And it was achieved by arrangement with an elastic body which is detachably arranged.

  Hereinafter, a thin vibration damping device according to an embodiment of the present invention will be described in detail with reference to the drawings. In this embodiment, the X, Y, and Z directions are defined as shown in FIG.

  The thin vibration damping device 20 according to the present embodiment shown in FIGS. 1 and 2 has a thin rectangular parallelepiped shape installed in a narrow space between a building floor, for example, a floor 21 of an OA floor and a slab 22 below the floor 21. The base frame 1 is formed as described above.

  The base frame 1 has a base frame 1a arranged in the Y direction on the right side in FIG. 1, an end frame 1b arranged in the Y direction on the left side in FIG. 1, and a parallel arrangement in the X direction on the upper side and the lower side in FIG. The base frame 1a and the end frames 1b are connected to each other, and the connecting frames 1c and 1d are connected to each other so as to form a square frame as a whole.

  On the base frame 1a, a pair of bearings 5 and 5 are arranged at a predetermined interval in the Y direction, and torsion shafts 7 and 7 are attached to the pair of bearings 5 and 5, respectively.

Further, in the vicinity of the connecting frames 1c and 1d, a pair of prismatic bodies 2 and 2 are arranged in parallel in the X direction as the connecting frames 1c and 1d, and one end sides of the pair of prismatic bodies 2 and 2 are respectively connected to the connecting frames 1c and 1d. It is placed on the base frame 1a.
Further, the other end sides of the pair of prismatic bodies 2 and 2 face the end frame 1b.

  As shown in FIGS. 1 and 3, a flat square plate-like plate body 2a is disposed at the lower part of the pair of prismatic bodies 2, 2, and the upper and lower portions of the plate body 2a in FIG. The prisms 2 and 2 are integrally attached. Further, one end side of the plate body 2a faces the vicinity of the base frame 1a, and the other end side is made to be the same end surface as the other end sides of the pair of prismatic bodies 2 and 2. The pair of prismatic bodies 2, 2 and the plate body 2a constitute a fixed mass.

  The projecting ends of the torsion shafts 7 and 7 attached to the bearings 5 and 5 arranged on the base frame 1a are respectively fitted to the side wall portions in the vicinity of one end side of the pair of prismatic bodies 2 and 2, thereby A fixed mass composed of the prismatic bodies 2, 2 and the plate body 2a is rotatable in the arrow direction (Z direction) shown in FIG. 3 with the torsion shafts 7, 7 serving as support shafts.

  Further, as shown in FIG. 5, the bearing 5 has a slit 5a along the axial direction of the torsion shaft 7, and a screw 6 is screwed into a screw hole 5b formed so as to penetrate the slit 5a in the vertical vertical direction. When the bolt 6 is tightened and adjusted, the inclination of the fixed mass can be adjusted via the torsion shaft 7.

  On the fixed mass composed of the pair of prismatic bodies 2, 2 and the plate body 2a, as shown in FIGS. 1, 3, and 4, a tuning mass 3 for adjusting natural vibration formed in a thin rectangular parallelepiped shape is X. It is arranged to be movable in the direction. That is, the dimension of the tuning mass 3 in the Y direction is set to be slightly smaller than the dimension between the opposing side walls of the pair of prismatic bodies 2, 2, and is guided by the opposing sidewall surfaces of the pair of prismatic bodies 2, 2. Thus, it can move in the X direction.

  Further, a number of screw holes 2b are formed in the central portion of the plate body 2a with a predetermined interval in the X direction, and two tuning bolts 11, 11 are provided in the central portion of the tuning mass 3 with a predetermined interval. Is arranged so as to penetrate the tuning mass 3 downward, and by changing the screwing positions of the two tuning bolts 11 and 11 with respect to the numerous screw holes 2b provided in the plate body 2a, the plate body of the tuning mass 3 The attachment position to 2a is variously changed in the X direction, so that the natural frequency at the time of vibration generation can be continuously adjusted.

  Furthermore, the vibration suppression action is exerted by the rotation in the direction of the arrow (Z direction) shown in FIG. 3 using the torsion shafts 7 and 7 of the fixed mass and tuning mass 3 described above as support shafts. Yes.

  In the vicinity of the other end of the plate body 2a, as shown in FIGS. 1 and 3, for example, eight adjustment bolts 8 are arranged in a row in the Y direction. Each adjustment bolt 8 is screwed into a screw hole provided so as to penetrate the plate body 2a in the Z direction, and an elastic body such as a small coil spring 9 having the lower end of the adjustment bolt 8 disposed on the end frame 1b. The elastic force acting on the fixed mass of the coil spring 9 can be adjusted by adjusting the screwing position of the adjusting bolt 8 in contact with the adjusting bolt 8.

  As a result, the coil spring 9 exerts a spring action combined with the torsion shaft 7, and the natural frequency adjustment range can be expanded by adjusting the screwing position of the adjustment bolt 8.

  Further, by removing the adjusting bolt 8 upward from the screw hole, the coil spring 9 can be taken out above the screw hole or replaced with a new coil spring 9.

  As shown in FIGS. 1 and 2, viscoelastic dampers 4 and 4 for adjusting damping force are arranged between the connection frames 1c and 1d and the pair of prisms 2 and 2, respectively, so as to be position-adjustable. ing. That is, the pair of prismatic bodies 2, 2 are provided with receiving plates 12, 12 having a large number of screw holes 12 a arranged in the X direction on the upper surface thereof, and the pair of prismatic bodies 2 of the viscoelastic dampers 4, 4. L-side mounting plates 14 having two mounting bolts 13 for screwing into the screw holes 12a of the receiving plates 12 and 12 are provided on the end surfaces on the two sides, and the viscoelastic dampers 4, 4 Attaching plates 15, 15 to which a pair of screws 16, 16 are screwed from the Y direction are provided on each end face on the connecting frame 1 c, 1 d side.

  Further, as shown in FIG. 2, the connecting frames 1c and 1d are each provided with a long hole 17 in the X direction, and the screw 16 is inserted into the long hole 17 and fastened to the contact plates 15 and 15. Thus, the viscoelastic dampers 4 and 4 are attached to the connecting frames 1c and 1d.

  Thus, by changing the position of the contact plate 15 along the long hole 17 and changing the screwing position of the two mounting bolts 13 in the mounting plate 14 with respect to the screw holes 12a provided in the receiving plate 12. The distance from the torsion shafts 7 and 7 of the viscoelastic dampers 4 and 4 is changed so that the damping force of the viscoelastic dampers 4 and 4 with respect to the fixed mass can be adjusted.

The dimension of the thin vibration damping device 20 described above can be set to a dimension adapted to the space of the OA floor floor 21.
For example, the width is set to about 500 mm × depth D500 mm × height H50 to 60 mm.

  It is also possible to adopt a configuration in which a damping device such as a damper is added to the configuration of the above-described thin vibration damping device 20 in order to further improve the damping characteristics.

  Next, a description will be given of a vibration control operation when the thin vibration damping device 20 according to this embodiment described above generates vibration. The thin vibration damping device 20 of the present embodiment has a feature that the tuning work of rigidity and damping required for exhibiting predetermined damping and damping performance can be simplified.

Specifically, as described above, the thin vibration damping device 20 supports the torsion shaft 7 attached via the bearing 5 on the base frame 1 installed at the lower part of the floor 21 of the OA floor. One end of the fixed mass is attached, a tuning mass 3 is attached on the fixed mass so that the position of the fixed mass can be changed, and a viscoelastic damper 4 is positioned between the base frame 1 and the prism 2 constituting the fixed mass. It can be changed.
Further, the lower end of the adjustment bolt 8 disposed at the other end of the fixed mass is brought into contact with the coil spring 9 disposed on the end frame 1b, and the screwing position of the adjustment bolt 8 is adjusted, whereby the fixed mass of the coil spring 9 is adjusted. It adjusts the elasticity that acts on the.

  Therefore, the mounting position of the tuning mass 3 with respect to the plate body 2a can be variously changed in the X direction by changing the screwing positions of the two tuning bolts 11 and 11 with respect to the numerous screw holes 2b provided in the plate body 2a. Thus, the natural frequency when the vibration is generated can be continuously adjusted (tuned).

  Further, the fixed mass and the tuning mass 3 rotate in the vertical direction with the torsion shaft 7 as a support shaft, and exhibit a damping effect. Further, the coil spring 9 exhibits a spring action combined with the torsion shaft 7, and in this case, the adjustment range of the natural frequency can be further expanded by adjusting the screwing position of the adjustment bolt 8.

  Moreover, the damping force with respect to the fixed mass of the viscoelastic damper 4 can be easily adjusted by changing the attachment position of the viscoelastic damper 4 and changing the distance from the torsion shaft 7.

  Further, by removing the adjustment bolt 8 from the screw hole upward, the coil spring 9 can be taken out above the screw hole or replaced with a new coil spring 9.

  Since the thin vibration damping device 20 according to the present embodiment does not use liquid as described above, it does not cause liquid leakage or the like, has good handling properties, and can perform adjustment of the natural frequency over a wide range and continuously. The damping force can be easily adjusted, and the overall effect of ensuring high performance with almost no friction and the like as in the conventional example is exhibited.

  Further, according to such a thin vibration damping device 20, by setting the dimensions as described above, for example, a narrow space (the height of the space is, for example, 50 to 60 mm) such as a pocket of the OA floor (lower part of the floor 21). Installation) is possible. Therefore, it is possible to take measures to prevent vibrations on the OA floor with a very simple construction by simply removing a part of the floor 21 of the OA floor and arranging the thin vibration damping device 20 in the space, and exhibit a very effective effect in terms of construction. To do.

  Furthermore, even if the floor vibration performance assumed in the design stage is not satisfied due to reasons such as construction variations or because it was not assumed at the time of design, the thin vibration damping device 20 of the present embodiment is used. It is possible to easily improve the vibration environment.

  Furthermore, from the standpoint of the designer, even if a vibration problem occurs after completion, vibration measures can be taken in a short period of time, making it possible to propose a bold economic design, which can significantly reduce costs. Open.

  As described above, the thin vibration damping device 20 of the present embodiment has a very beneficial effect not only after the building is completed but also at the design and construction stage.

  Next, a vibration damping system using a plurality of thin vibration damping devices 20 of this embodiment will be described with reference to FIG.

  If the total mass used for the vibration control device is the same, according to the Japan Society of Mechanical Engineers paper “Optimum Design Method for Multiple Vibration Absorbers” (September 1996, Vol. It is known that the vibration reduction effect is higher when the natural frequency is divided into a plurality of parts to be different from each other.

  Since the thin vibration damping device 20 of the present embodiment described above has a size that can be stored in the pocket of the OA floor (generally 500 × 500 mm), the dimension is at most about width 500 × depth 500 × height 60 mm. In the case where iron is used for the mass portion of the thin vibration damping device 20, the weight resistance is about 100 kg.

  For this reason, as shown in FIG. 6, the thin vibration damping device 20 is made to have a vibration damping system 30 in which, for example, 10 units are arranged vertically and horizontally below the floor of the vibration damping target location 31, so that the weight resistance is about 1 ton. it can. In this case, by making the natural frequency of each thin vibration damping device 20 different by changing the position of the tuning mass 3 or the like, it is possible to enhance the vibration reduction effect of the floor without any special measures. It goes without saying that the number of the thin vibration damping devices 20 can be appropriately selected according to the scale and weight of the vibration damping target portion 31.

  In addition to the above-described case, the present invention can be widely applied to structures such as houses, buildings, bridges, dams, vibration control tables such as precision equipment, and various other vibration control target locations.

It is a top view of the thin damping device concerning the example of the present invention. It is a front view of the thin damping device concerning this example. It is the sectional view on the AA line of FIG. It is the BB sectional view taken on the line of FIG. It is an expanded sectional view showing a bearing and a torsion shaft of a thin vibration damping device concerning this example. 1 is a schematic configuration diagram of a vibration damping system using a plurality of thin vibration damping devices according to the present embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Base frame 1a Base frame 1b End frame 1c Connection frame 1d Connection frame 2 Rectangular column body 2a Plate body 2b Screw hole 3 Tuning mass 4 Viscoelastic damper 5 Bearing (clamp)
5a Slit 5b Screw hole 6 Bolt 7 Torsion shaft 8 Adjustment bolt 9 Coil spring 11 Tuning bolt 12 Receiving plate 12a Screw hole 13 Mounting bolt 14 Mounting plate 15 Contact plate 16 Screw 17 Slotted hole 20 Thin damping device 21 Floor 22 Slab 30 Control Vibration system 31

Claims (8)

A thin base frame installed at the vibration suppression target location,
A fixed mass whose one end is rotatably supported by a torsion shaft supported by a bearing on the base frame;
A tuning mass attached to the fixed mass so that the attachment position can be adjusted;
A viscoelastic damper attached so that the attachment position can be adjusted between the base frame and the fixed mass;
A thin vibration damping device characterized by comprising: A thin base frame installed at the vibration suppression target location,
A fixed mass whose one end is rotatably supported by a torsion shaft supported by a bearing on the base frame;
A tuning mass attached to the fixed mass so that the attachment position can be adjusted;
A viscoelastic damper attached so that the attachment position can be adjusted between the base frame and the fixed mass;
An elastic body detachably disposed between the lower end of the other end of the fixed mass and the base frame;
A thin vibration damping device characterized by comprising: A rectangular frame-shaped thin base frame installed at the vibration suppression target location,
It consists of a pair of prisms whose one ends are rotatably supported by a pair of torsion shafts supported by a pair of bearings on this base frame, and a flat rectangular plate-like plate attached to the pair of prisms. With a fixed mass,
A tuning mass attached to the plate in the fixed mass so that the attachment position can be adjusted;
A viscoelastic damper attached so that the attachment position can be adjusted between the base frame and a pair of prisms in the fixed mass;
An elastic body arranged such that the elastic force can be adjusted between the lower end of the other end of the plate body and the other end of the base frame in the fixed mass, and detachable;
A thin vibration damping device characterized by comprising:   The thin vibration damping device according to any one of claims 1 to 3, wherein the torsion shaft is adjusted by a clamp mechanism provided in a bearing so that the inclination of the fixed mass supported by the torsion shaft can be adjusted.   A thin base frame, a fixed mass that is rotatably supported at one end side by a torsion shaft supported by a bearing on the base frame, a tuning mass that is attached to the fixed mass so that its attachment position can be adjusted, and A damping system characterized in that a required number of thin damping devices having a viscoelastic damper attached so that its mounting position can be adjusted between a base frame and a fixed mass are arranged and arranged in a place to be damped.   A thin base frame, a fixed mass that is rotatably supported at one end side by a torsion shaft supported by a bearing on the base frame, a tuning mass that is attached to the fixed mass so that its attachment position can be adjusted, and A thin vibration damping device comprising: a viscoelastic damper, the attachment position of which is adjustable between the base frame and the fixed mass; and an elastic body, which is detachably disposed between the lower end of the other end of the fixed mass and the base frame. A vibration control system characterized in that a required number of devices are arranged and arranged at locations to be controlled.   A rectangular frame-shaped thin base frame, a pair of prisms whose one ends are rotatably supported by a pair of torsion shafts supported by a pair of bearings on the base frame, and attached to the pair of prisms A fixed mass composed of a flat rectangular plate-like plate body, a tuning mass attached to the plate body in the fixed mass so that the attachment position can be adjusted, the base frame, and a pair of prismatic bodies in the fixed mass Between the viscoelastic damper attached in an adjustable manner between the attachment position and the lower end of the other end of the plate body in the fixed mass and the other end of the base frame, the elastic force can be adjusted and detachable. A thin damping device having an elastic body, and a required number of rows arranged in a place to be controlled.   The vibration damping system according to any one of claims 5 to 7, wherein the torsion shaft is adjusted by a clamp mechanism provided on a bearing so that the inclination of the fixed mass supported by the torsion shaft can be adjusted.

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