JP2007024261A - Synchronized cradle type damper - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a damper which can protect the structure effectively from the vibration given by an earthquake, a wind and a vehicle etc. by exhibiting the damping performance sufficiently not only to the vibration of small amplitude but also to the vibration of big amplitude as well. <P>SOLUTION: A damper is equipped with a support body 2 having a support face 2a to form a concave curve which sweeps the concave curve on the vertical plane being extended along the side face of the support body toward the width of the support body, two rolling elements 3 to be positioned at both outsides of width direction of the above support body and two rolling rollers 4 which connect both end parts rotatably with two as above rolling elements respectively and support those rolling elements while they are supported to rolling free along the support face on each support face. It is a synchronized cradle type damper which the curvature radius becomes small when the above concave curve of two support faces as above are away from the lowest part. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a tuned oscillation type vibration damping device that absorbs vibration energy of a structure by mass oscillating in synchronization with the vibration of the structure caused by an earthquake, wind, passing vehicle, etc., and particularly has a concave curved surface. The present invention relates to a tuned cradle type vibration damping device having a support surface.

Structures include fixed structures such as buildings, bridges, steel towers, chimneys, tanks, sluices, and dams, and moving structures such as ships, aircraft, and vehicles. When these structures are shaken by the force transmitted by an earthquake, wind, passing vehicle, etc., a rocker with a rolling roller supported by a support surface that forms a concave curved surface is installed in the structure, and the rocker shakes. For example, Patent Literature 1 disclosed by the applicant of the present application discloses a vibration damping device that performs vibration damping in synchronization with a structure.
Japanese Patent Laying-Open No. 2005-083499

  By the way, when the inventor of the present application has made research on the above-described conventional vibration damping device, the support surface forming the concave curved surface of the vibration damping device has an arc shape with a constant curvature radius. It has been found that the rocking cycle of the is changed.

  That is, in general, the pendulum swings at a substantially constant period if it is a minute vibration. However, if the vibration increases, the period changes according to the magnitude, and the period becomes longer as the vibration becomes larger.

  The same applies to the conventional vibration damping device described above, since the radius of curvature of the support surface of the rolling roller for oscillating the cradle is constant. Shake at. However, particularly in the case of a long-period vibration damping device, if the rocking amplitude of the rocker increases, the rocking cycle may change and the vibration damping performance may deteriorate.

  The present invention has been made paying attention to the above-described problems, and an object thereof is to provide a vibration damping device that can sufficiently exhibit vibration damping performance even with respect to vibration having a large amplitude.

  The tuning cradle type vibration damping device according to the present invention that advantageously solves the above-described problems is the one according to claim 1, wherein a concave curve on a vertical plane extending along the side surface of the support is defined as the width direction of the support. A support surface having a concave curved surface that is swept into two sides, two oscillators positioned on both outer sides in the width direction of the support material, and each supported on the support surface so as to be able to roll along the support surface. And two rolling rollers that are rotatably coupled at both ends to the two oscillators and support the oscillators, the concave curved surfaces of the two support surfaces. However, the radius of curvature decreases as the distance from the lowermost portion increases.

  According to a third aspect of the present invention, there is provided the tuned cradle type vibration damping device according to the third aspect, wherein each concave curved surface is formed by sweeping a concave curve on a vertical plane extending along the side surface of the support in the width direction of the support. Two support bodies extending in parallel with each other with the side surfaces being parallel to each other, a rocker positioned between the two support bodies, and the two support bodies. Each of the support surfaces is supported so as to be able to roll along the support surface, and one end is rotatably coupled to each of the oscillators on two different axes so as to support the oscillators. Two or four rolling rollers, and the concave curved surfaces of the two supporting surfaces have a radius of curvature that decreases with increasing distance from the lowermost portion.

  Further, according to the tuned cradle type vibration damping device of the present invention, the concave curved surface in which the concave curve on the vertical plane extending along the side surface of the support is swept in the width direction of the support. Four support bodies having side surfaces extending in parallel with each other, and forming a pair adjacent to each other, two of each set including the support surfaces, A support body that is shifted from each other in a direction along a side surface of the support body, and a support member that is positioned so as to have a gap between the two sets; a swinger that is positioned between the two sets of support bodies; The support surface of the support body is supported so as to be able to roll along the support surface, and one end portion of the support body is rotatably coupled to each other on two different axes. Four rolling rollers for supporting the two, The concave surface of the supporting surface of, and characterized in that the radius of curvature becomes smaller as it gets farther away from the bottom.

  In the tuned cradle type vibration damping device according to claims 1, 3 and 5, when the support body vibrates in the direction along the side surface of the support body, two different ones are synchronized with the vibration of the support body. The oscillator supported by the support surface that forms the concave curved surface of the support via two or four rolling rollers on the axis swings without rolling, and the two or four rolling rollers. Rolls to absorb the vibration energy of the support. Moreover, since the radius of curvature of the concave curved surface of the support becomes smaller as it moves away from the lowermost part, even if the amplitude of the vibration of the support is large, the rocking period of the rocker changes little or not at all. .

  Therefore, according to the tuned cradle type vibration damping device of the present invention, the vibration damping performance can be sufficiently exhibited not only for vibrations having a small amplitude but also for vibrations having a large amplitude. It can be effectively protected from vibrations caused by etc.

  In particular, in the case of claim 5, the four support bodies that form a pair adjacent to each other are arranged so that two of the sets are shifted from each other in the direction along the side surface of the support body. Therefore, the installation area of the vibration damping device can be significantly reduced as compared with the case where the support body has two support surfaces arranged in the direction along the side surface of the support body.

  In the tuned cradle type vibration damping device according to the present invention, as described in claim 2, in the device according to claim 1, the support body has the support surface arranged in a direction along a side surface of the support body. The two rolling rollers may be arranged on the two support surfaces, respectively, so that two relatively long oscillators can be stably oscillated. As a result, the vibration control effect can be further enhanced, and only one rolling roller is placed on each support surface, so that the support surface can be used in the direction along the side surface of the support body for a longer vibration. The vibration control performance can be fully exhibited.

  Moreover, in the tuned cradle type vibration damping device of the present invention, as described in claim 4, in the structure described in claim 3, the two support bodies are arranged along the side surfaces of the support bodies. The number of the rolling rollers may be two, and in this way, the support body is more effective than the case where the support body has two support surfaces arranged in the direction along the side surface of the support body. While greatly reducing the installation area of the device, one relatively long rocker can be rocked stably, and the vibration damping effect can be further enhanced, and only one on each support surface Since the rolling roller rides, the support surface can be used for a long time in the direction along the side surface of the support body, and the vibration damping performance can be sufficiently exerted against vibration having a larger amplitude.

  Further, in the tuned cradle type vibration damping device of the present invention, as described in claim 6, the concave curve of the support surface may be a spiral curve, or if a spiral curve concave curve is used. It is possible to form a concave curved surface whose radius of curvature decreases as it moves away from the lowermost part, and in particular, by reducing the radius of curvature under predetermined conditions as it moves away from the lowermost part, regardless of the magnitude of vibration The oscillation cycle can always be constant.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIGS. 1A and 1B are a front view and a side view schematically showing a first embodiment of the tuning cradle type vibration damping device of the present invention, and FIG. 2 is a tuning diagram of the first embodiment. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view schematically showing a cradle-type vibration damping device installed on a structure that rolls. Reference numeral 1 in the drawing denotes the tuned cradle-type vibration damping device of the first embodiment.

  The tuned cradle type vibration damping device 1 according to the first embodiment includes a substantially square bar-shaped support body 2 and two swings located on both outer sides of the support body 2 in the width direction (left-right direction in FIG. 1B). The support body 2 includes an upward concave curve on a virtual vertical plane that extends along the side surface of the support body 2 (the front-facing surface in FIG. 1A). The body 2 has two support surfaces 2 a that form an upward concave curved surface that is swept in the width direction, and these support surfaces 2 a are arranged in a direction along the side surface of the support 2.

  In addition, the tuned cradle type vibration damping device 1 of the first embodiment is supported on the support surface 2a so as to be able to roll along the support surface 2a, and both ends of the two oscillating members 3 are supported at both ends. Are provided with two rolling rollers 4 that are rotatably inserted into the two and support the swingers 3, and the two rolling rollers 4 are respectively disposed on the two support surfaces 2a. . Here, in the illustrated example, both ends of two rolling rollers 4 rotatably inserted into the two oscillators 3 are fitted with C-rings 5 so as to be prevented from coming off from the oscillator 3. .

  In the tuned cradle type vibration damping device 1 of the first embodiment, each of the concave curved surfaces of the two support surfaces 2a has a radius of curvature that decreases as the distance from the lowermost portion in the horizontal direction along the side surface of the support 2 increases. It is supposed to be. For comparison, the support surface 2b indicated by the phantom line in FIG. 1A is a conventional one having an upwardly curved concave surface with a constant curvature radius.

  When the tuned cradle type vibration damping device 1 of the first embodiment is installed in a structure 6 having a ramen structure that rolls as shown by an arrow B in FIG. (A) As indicated by the middle arrow A, the support 2 vibrates in the direction along the side surface of the support 2, thereby synchronizing with the vibration of the support 2 and on two different axes. The oscillator 3 supported by the support surface 2a forming the concave curved surface of the support body 2 via the two rolling rollers 4 swings without rolling, and the two rolling rollers 4 are supported by the support surface 2a. Rolls up to absorb the vibration energy of the support 2. In addition, the concave curved surface forming the support surface 2a of the support 2 has a radius of curvature that decreases with increasing distance from the lowermost portion. Therefore, even if the amplitude of vibration of the support 2 is large, the oscillator The oscillation period of 3 changes little or not.

  Therefore, according to the tuned cradle type vibration damping device 1 of the first embodiment, it is possible to sufficiently exhibit the vibration damping performance not only for the vibration having a small amplitude but also for the vibration having a large amplitude. It can effectively protect against vibrations caused by wind, vehicles, etc.

  Moreover, according to the tuned cradle type vibration damping device 1 of the first embodiment, the support body 2 has two support surfaces 2a arranged in the direction along the side surface of the support body 2, and the two rolling rollers 4 have them. Since they are respectively arranged on the two support surfaces 2a, the two relatively long oscillators 3 can be stably oscillated, and the damping effect can be further enhanced. Since only one rolling roller 4 rides on 2a, the support surface 2a can be used longer in the direction along the side surface of the support 2 than when two rolling rollers 4 ride on one support surface 2a. The damping performance can be sufficiently exerted against the vibration having a large amplitude.

  3 (a), 3 (b) and 3 (c) are a front view, a plan view and CC in FIG. 3 (b) schematically showing a second embodiment of the tuned cradle type vibration damping device of the present invention. It is sectional drawing which follows a line, In FIG. 3, the same part as the previous Example is shown with the same code | symbol. .

  In the tuning cradle type vibration damping device of the second embodiment, indicated by reference numeral 11 in the figure, two substantially thick plate-like supports 2 erected on a substrate 7 and a space between these two supports 2. The two support bodies 2 are each a virtual vertical extending along a side surface of the support body 2 (a front-facing surface in FIG. 3 (a)). It has a support surface 2a that forms an upward concave curved surface by sweeping a concave curve on a plane in the width direction of the support 2 (left and right in FIG. 3C), and the side surfaces are parallel to each other in the width direction. Are spaced apart from each other.

  The tuned cradle type vibration damping device 11 of the second embodiment is supported on the support surface 2a so as to be able to roll along the support surface 2a, and has one end portion on the oscillator 3 respectively. Two rolling rollers 4 that are rotatably coupled and support the rocker 3 are provided, and the two rolling rollers 4 are respectively disposed on the two support surfaces 2a. Here, the other end portion (outer end portion) of the two rolling rollers 4 rotatably coupled to the oscillator 3 is provided with a disk 8 on the outside which is slightly larger than the rolling roller 4 in the illustrated example. And is prevented from coming off from the support 2.

  In the tuned cradle type vibration damping device 11 of the second embodiment, each of the concave curved surfaces of the two support surfaces 2a has a radius of curvature that decreases as the distance from the lowermost portion in the horizontal direction along the side surface of the support 2 increases. It is supposed to be. For comparison, the support surface 2b indicated by the phantom line in FIG. 3A is a conventional one that forms an upwardly concave curved surface having an arc shape with a constant curvature radius.

  Further, in the tuned cradle type vibration damping device 11 of the second embodiment, as is apparent from FIGS. 3A and 3B, the two support bodies 2 are connected to each other with the support surfaces 2a. The two rolling rollers 4 are shifted from each other in the horizontal direction along the side surface, and are positioned on two axes that are horizontally separated from each other by a distance equal to the shift amount between the support surfaces 2a. It is supported on the surface 2a so as to be able to roll along the support surface 2a.

  According to the tuned cradle type vibration damping device 11 of the second embodiment, when the support body 2 vibrates in the direction along the side surface of the support body 2 as in the first embodiment, the vibration of the support body 2 is synchronized. Then, the oscillator 3 supported by the support surface 2a forming the concave curved surface of the support body 2 via the two rolling rollers 4 on two different axes is swung without rolling, These two rolling rollers 4 roll on the support surface 2 a and absorb the vibration energy of the support 2. In addition, the concave curved surface forming the support surface 2a of the support 2 has a radius of curvature that decreases with increasing distance from the lowermost portion. Therefore, even if the amplitude of vibration of the support 2 is large, the oscillator The oscillation period of 3 changes little or not.

  Therefore, even with the tuned cradle type vibration damping device 11 of the second embodiment, the vibration damping performance can be sufficiently exerted not only for the vibration having a small amplitude but also for the vibration having a large amplitude. Effective protection from vibrations caused by wind, vehicles, etc.

  Furthermore, according to the tuned cradle type vibration damping device 11 of the second embodiment, the two support bodies 2 shift the support surfaces 2a from each other in the direction along the side surfaces of the support bodies 2, and the two rolling elements. The roller 4 is positioned on two axes that are horizontally separated from each other by a distance equal to the amount of shift between the support surfaces 2a, and can roll along the support surface 2a on each of the support surfaces 2a. Since the support body 2 has two support surfaces 2a arranged in a direction along the side surface of the support body 2 as in the first embodiment, the installation area of the vibration damping device is greatly increased. While being reduced in size, a relatively long single oscillator 3 can be stably oscillated without rolling, and the damping effect can be further enhanced, and the same as in the first embodiment. Since there is only one rolling roller 4 on each support surface 2a, the support surface 2 The obtained using long in a direction along the side surface of the support body 2, it is possible to sufficiently exhibit the vibration damping performance for more large amplitude vibrations.

  4 (a), 4 (b) and 4 (c) are a front view, a plan view, and a DD in FIG. 4 (b) schematically showing a third embodiment of the tuned cradle type vibration damping device of the present invention. FIG. 5 is a cross-sectional view taken along a line, and in FIG. 4, the same parts as those in the previous embodiment are denoted by the same reference numerals. .

  The tuned cradle type vibration damping device of the third embodiment indicated by reference numeral 21 in the figure forms a pair adjacent to each other and stands on the substrate 7 so that there is a gap between the two pairs. It is provided with four substantially thick plate-like supports 2 provided, and a rocker 3 positioned between the two sets of supports 2, and each of the four supports 2 corresponds to the support. Upward sweeping a concave curve on a virtual vertical plane extending along the two side surfaces (front-facing surface in FIG. 4A) in the width direction of the support 2 (left-right direction in FIG. 4C) The side surfaces are parallel to each other and extend between the two sheets of the respective sets with a slight gap therebetween in the width direction.

  In addition, the tuned cradle type vibration damping device 21 of the third embodiment is supported on the support surface 2a so as to be able to roll along the support surface 2a, and has one end portion on the oscillator 3 respectively. Four rolling rollers 4 that are rotatably coupled to support the rocker 3 are provided, and the four rolling rollers 4 are respectively provided on the four support surfaces 2a of the four supports 2. Has been placed. Here, the other end portion (outer end portion) of the four rolling rollers 4 rotatably coupled to the oscillator 3 is provided with a disk 8 on the outside that is slightly larger than the rolling roller 4 in the illustrated example. And is prevented from coming off from the support 2.

  In the tuned cradle type vibration damping device 21 of the third embodiment, each of the concave curved surfaces of the four support surfaces 2a has a radius of curvature that decreases as the distance from the lowermost portion in the horizontal direction along the side surface of the support 2 increases. It is supposed to be. For comparison, the support surface 2b indicated by the phantom line in FIG. 4A is a conventional one having an arcuate concave surface with a constant curvature radius.

  Further, in the tuned cradle type vibration damping device 21 of the third embodiment, as is apparent from FIGS. 4A and 4B, the two support members 2 of each set support the support surfaces 2a with each other. The two rolling rollers 4 are displaced from each other in the horizontal and vertical directions along the side surface of the body 2, and the four rolling rollers 4 are spaced apart from each other in the horizontal and vertical directions by a distance equal to the amount of shift between the support surfaces 2 a. Two each are located on the axis, and are supported on the support surfaces 2a so as to be able to roll along the support surfaces 2a.

  According to the tuned cradle type vibration damping device 21 of the third embodiment, when the support body 2 vibrates in the direction along the side surface of the support body 2 as in the first and second embodiments, the support body 2 The oscillating element 3 supported by the support surface 2a which forms the concave curved surface of the support 2 via the four rolling rollers 4 on two different axes in synchronism with the vibration is indicated by phantom lines in FIG. As shown by an arrow E in FIG. 4A, the two swing rollers 4 swing without rolling, and the four rolling rollers 4 roll on the support surface 2a to support. Absorbs the vibration energy of the body 2. In addition, the concave curved surface forming the support surface 2a of the support 2 has a radius of curvature that decreases with increasing distance from the lowermost portion. Therefore, even if the amplitude of vibration of the support 2 is large, the oscillator The oscillation period of 3 changes little or not.

  Therefore, even with the tuned cradle type vibration damping device 21 of the third embodiment, the vibration damping performance can be sufficiently exerted not only for the vibration having a small amplitude but also for the vibration having a large amplitude. Effective protection from vibrations caused by wind, vehicles, etc.

  Further, according to the tuned cradle type vibration damping device 21 of the third embodiment, the two support bodies 2 of each set are mutually connected to the support surfaces 2a in the horizontal direction and the vertical direction along the side surfaces of the support bodies 2. At the same time, the four rolling rollers 4 are positioned on two axes that are separated from each other in the horizontal and vertical directions by a distance equal to the amount of shift between the support surfaces 2a, and on each of the support surfaces 2a. Since the support 2 is supported so as to be able to roll along the support surface 2a, the support 2 has two support surfaces 2a arranged in the direction along the side surface of the support 2 as in the first embodiment. As compared with the above, the installation area of the vibration damping device can be greatly reduced, and the relatively long single rocker 3 can be rocked stably without rolling, and the vibration damping effect can be further enhanced. Along with each support surface 2a, the same as in the first embodiment. Since the rolling roller 4 rides only obtained using long in a direction along the support surface 2a on the side surface of the support body 2, it is possible to sufficiently exhibit the vibration damping performance for more large amplitude vibrations.

  FIG. 5A shows that the support surface 2a is formed by the tuned cradle type vibration damping devices 1, 11 and 21 of the first to third embodiments. As the distance from the lowermost portion decreases in the horizontal direction along the side surface of the support body 2, FIG. FIG. 5B is an explanatory diagram showing an example of an upward concave curved surface in which the radius of curvature is small, and FIG. 5B is an explanatory diagram showing coefficients of a calculation method for obtaining the concave curved surface of the example.

That is, in this calculation method, the radius of the rolling roller 4 is r, the radius of the concave curved surface that forms the support surface 2a is R, the rolling radius of the rolling roller 4 is l (el), and from the bottom of the support surface 2a. The swing angle of the rolling roller 4 is θ, the maximum swing angle is θm, the mass of the rocker 3 and the rolling roller 4 is m, the moment of inertia of the rolling roller 4 is I, and the gravitational acceleration is g. Accordingly, the swing period T of the rolling roller 4 can be obtained by the following equation (1) by substituting sin (θ / 2) = sin (θm / 2) sinφ.

とすると、上記式（１）は、次式（２）となる。

Here, since the rolling roller 4 is small, (m + I / r ² ) / m = 1 is set.

Then, the above equation (1) becomes the following equation (2).

When both sides of the equation (2) are squared and obtained with respect to l (l = R−r), the following equation (3) is obtained.

  In the above equation (3), while the oscillation period T is set to a constant value, the value of θm is increased by 5 ° from 0 ° to 90 °, for example, and the value of ki (where i = 1, 2, 3,...). Is changed, the change state of the value of the rolling radius l of the rolling roller 4 in which the oscillation period T is always constant is obtained, and Ri (Ri = 1 + r) (where i = 1, 2, 3,. ..) is obtained and illustrated, as shown in FIG. 5 (a), the upward concave curve having a spiral shape in which the distance from the center of the predetermined position decreases and the radius of curvature decreases with increasing distance from the lowermost portion in the horizontal direction. A concave curved surface swept into

  Therefore, if the concave curved surface shown in FIG. 5 (a) is used for the support surface 2a in the tuned cradle type vibration damping devices 1, 11 and 21 of the above-described embodiments, even if the vibration amplitude of the support 2 is large, The oscillation period of the oscillator 3 can be kept constant at all times without changing at all, so that the vibration control performance can always be sufficiently exerted not only for vibrations having a small amplitude but also for vibrations having a large amplitude, The structure can be effectively protected from vibrations caused by earthquakes, winds, vehicles and the like.

  Although the present invention has been described based on the illustrated examples, the present invention is not limited to the above-described example. For example, the upward concave curved surface whose curvature radius decreases as it moves away from the lowermost portion of the support surface 2a is an Archimedean spiral. Alternatively, it may be one obtained by sweeping various spiral curves such as a parabolic spiral, a hyperbolic spiral, and a logarithmic spiral. Further, the concave curved surface that forms the support surface 2a and has a radius of curvature that decreases as the distance from the lowermost portion increases, as shown in FIG. 5A, is an upward concave curve that decreases from the center of the predetermined position as the distance from the lowermost portion decreases. It may be a sweeping of. And the structure of a support body, a rocking | swiveling element, a rolling roller, etc. can be suitably changed as needed within the scope of the claims.

  Thus, according to the tuned cradle type vibration damping device of the present invention, the vibration damping performance can be sufficiently exhibited not only for vibrations having a small amplitude but also for vibrations having a large amplitude. Can be effectively protected from vibrations caused by.

(A) And (b) is the front view and side view which show typically 1st Example of the synchronous cradle type damping device of this invention. It is a front view which shows typically the state which installed the synchronous cradle type vibration damping device of the said 1st Example in the structure which rolls. (A), (b) and (c) are a front view schematically showing a second embodiment of the tuned cradle type vibration damping device of the present invention, a plan view, and a cross section taken along line CC in (b). FIG. (A), (b) and (c) is a front view schematically showing a third embodiment of the tuned cradle type vibration damping device of the present invention, a plan view, and a cross section along line DD in (b). FIG. (A) And (b) is explanatory drawing which shows an example of the upward concave curved surface which forms a support surface with the synchronous cradle type vibration damping device of the said 1st thru | or 3rd Example, and the calculation which calculates | requires the concave curved surface of the example It is explanatory drawing which shows each coefficient of a method.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 11, 21 Synchronous cradle type damping device 2 Support body 2a Support surface where a curvature radius becomes small as it goes away from the lowest part 2b Arc-shaped support surface 3 Oscillator 4 Rolling roller 5 C ring 6 Structure 7 Substrate 8 Disk

Claims (6)

A support (2) having a support surface (2a) that forms a concave curved surface obtained by sweeping a concave curve on a vertical plane extending along the side surface of the support in the width direction of the support;
Two oscillators (3) located on both outer sides in the width direction of the support;
Two rolling elements that are supported on the supporting surface so as to be able to roll along the supporting surface, and that both ends are rotatably coupled to the two oscillating elements to support the oscillating elements. Roller (4),
With
A tuned cradle-type vibration damping device, wherein the concave curved surfaces of the two support surfaces are such that the radius of curvature decreases with increasing distance from the lowermost part. The support (2) has two support surfaces (2a) arranged side by side in a direction along the side surface of the support,
The tuned cradle type vibration damping device according to claim 1, characterized in that the two rolling rollers (4) are respectively arranged on the two supporting surfaces. Each has a support surface (2a) that forms a concave curved surface obtained by sweeping a concave curve on a vertical plane extending along the side surface of the support body in the width direction of the support body, and the side surfaces are parallel to each other. Two supports (2) extending through
An oscillator (3) positioned between the two supports;
The two supports are supported on the support surfaces so as to be able to roll along the support surfaces, respectively, and one end portion is rotatably coupled to the oscillator on two different axes. Two or four rolling rollers (4) supporting the rocker;
With
A tuned cradle-type vibration damping device, wherein the concave curved surfaces of the two support surfaces have a curvature radius that decreases with increasing distance from the lowermost portion. The two support bodies are shifted from each other in the direction along the side surface of the support body, the support surfaces,
4. The synchronous cradle type vibration damping device according to claim 3, wherein there are two rolling rollers. Each has a support surface (2a) that forms a concave curved surface obtained by sweeping a concave curve on a vertical plane extending along the side surface of the support body in the width direction of the support body, and the side surfaces extend in parallel with each other. There are four supports that are adjacent to each other in pairs, and two members of each set are offset from each other in the direction along the side surface of the support. A support (2) positioned such that there is a gap therebetween;
An oscillator (3) located between the two sets of supports;
The two sets of supports are supported by the support surfaces so as to be able to roll along the support surfaces, respectively, and one end is rotatably coupled to the oscillator on two different axes. Four rolling rollers (4) supporting the oscillator,
With
A tuned cradle-type vibration damping device, wherein the concave curved surfaces of the two support surfaces have a curvature radius that decreases with increasing distance from the lowermost portion.   The tuned cradle type vibration damping device according to any one of claims 1 to 5, wherein the concave curve of the support surface is a spiral curve.

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