JP2006342655A - Vibration damping structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vibration damping structure capable of amplifying the deformation of a vibration damping means and preventing damping performance from being lowered. <P>SOLUTION: This vibration damping structure comprises an upper support part 6 fixed to a superstructure part 7 and projected to the lower side of the superstructure part 7, a lower support part 10 fixed to a base structural part 11 and projected to the upper side of the base structural part 11, and a swing body 15 pivoted to both the superstructure part 7 and the lower support part 10. The swing body 15 is pivoted to both the upper support part 6 and the lower support part 10 at a higher position than an intermediate part between the superstructure part 7 and the base structural part 11. The swing body 15 is connected to the upper support body 6 through the vibration damping means 22 at a higher position than the pivot positions of the swing body 15 pivoted to the upper support part 6 and the lower support part 10. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a vibration control structure provided in a structure such as a building.

As an example of a vibration control structure for a building, a technique described in Patent Document 1 is known.
The damping structure described in Patent Document 1 includes a lower projecting body that is rigidly integrally fixed to the upper structure portion and protrudes below the upper structure portion, and a lower structure portion that is rigidly integrally fixed to the lower structure portion. The upper projecting body projecting above the part and the swinging motion body are provided, and the lower projecting body and the upper projecting body are opposed to each other in the vertical direction at an intermediate height position between the upper and lower structure parts. Are pivoted to the lower projecting body and the upper projecting body, respectively, in the intermediate region in the height direction, and above the pivoting height position of the swinging motion body and the lower projecting body, The lower projecting body and / or the upper structure part are connected via the vibration damping means, and the swinging motion body and the upper projecting body are below the pivot height position of the swinging motion body and the upper projecting body. Or / and the lower structure part connected via vibration damping means. .

In such a vibration damping structure, the swinging motion body is pivotally held by the lower protrusion and the upper protrusion in the height direction intermediate region, and therefore in the vibration direction required for the swing motion body. The rigidity can also be lowered, and the swinging motion body can be configured compactly in the vibration direction. Therefore, a compact damping structure can be realized in the vibration direction.
Furthermore, the size of the vibration transmitted to the damping means can be varied depending on the lever principle by varying the pivot position of each projecting body and the swinging motion body and varying the distance between the pivot sections. Therefore, it is possible to construct a structure capable of attenuating a large vibration or a structure capable of attenuating a small vibration while using a damping means having the same performance.
In particular, the swing motion body is configured to be connected to the upper and lower vibration damping means at least in a height region where the amplitude of the swing motion is larger than the amplitude of the horizontal vibration, so that the amplitude is larger than the actual vibration. It is possible to cause vibration to act on the damping means and to attenuate such relatively small vibration with such a damping means while using a damping means that is not effective against relatively small vibrations such as traffic vibrations. It becomes possible.
JP 2000-297556 A

  However, in the vibration damping structure as described above, the swinging moving body is pivotally connected to the lower projecting body and the upper projecting body in the intermediate region in the height direction, so that the amplitude of vibration transmitted to the vibration damping means is amplified. In order to achieve this, it is necessary to lengthen the space between the pivoting portion and the vibration damping means, that is, to lengthen the length of the swinging motion body. Increasing the length of the swaying body not only tends to bend in the out-of-plane direction (the direction intersecting the surface along the swaying direction), but also tends to cause damage to the swaying body, thus reducing the damping performance. There is.

  This invention is made | formed in view of the said situation, and makes it a subject to provide the damping structure which can amplify the deformation | transformation of a vibration damping means and can prevent the fall of damping performance.

In order to solve the above-mentioned problem, the invention according to claim 1 is, for example, as shown in FIGS. 1 to 4, an upper support portion fixed to the upper structure portion 7 and protruding below the upper structure portion 7. 6, a lower support portion 10 fixed to the lower structure portion 11 and protruding above the lower structure 11, and an oscillating body 15 pivoted to both the upper support portion 7 and the lower support portion 10. Prepared,
The oscillating body 15 is pivotally connected to both the upper support portion 6 and the lower support portion 10 at a position above or below a middle portion between the upper structure portion 7 and the lower structure portion 11.
The vibration body 15 and the upper support section 6 or the lower support section 10 are vibration damping means at a position above or below the pivot position between the upper support section 6 and the lower support section 10 of the rocking body 15. It is connected through 22.

The vibration attenuating means 22 is arranged outside the two pivot positions, but when the oscillator 15 and the upper support 6 are connected by the vibration attenuator 22, the oscillator 15 is opposite to the pivot position. It is desirable to connect with the upper support part 6 via the vibration damping means 22 in the edge part of this.
The upper structure portion includes, for example, a pillar and a beam, when the structure portion is configured, and includes an upper end portion of the column and a beam, a floor, and the like installed between these upper end portions, and the lower structure portion is a lower end portion of the column. And beams, floors and the like installed between these lower ends.
As the vibration damping means, a damping member comprising a spring and a damper, rubber, an oil damper, a viscoelastic material, or the like is preferably used, and further, the vibration may be attenuated by friction.
In addition, the upper support portion, the lower support portion, the rocking body, and the like may be incorporated in a newly built building or may be incorporated as a renovation in an existing building.

According to the first aspect of the present invention, in order to effectively use the damping function from a small deformation of a structure such as a building, the deformation of the structure is amplified and transmitted to the vibration damping means 22 using the lever principle. is doing.
That is, when the structure is deformed by an earthquake such as an earthquake, the upper structure portion 7 and the lower structure portion 11 of the structure are displaced left and right, and accordingly, the upper support portion 6 and the lower support portion 10 are moved. Displaces left and right. When the upper support portion 6 and the lower support portion 10 are displaced to the left and right, the swinging body 15 swings like a pendulum around the central portion between the two pivot positions. The vibration of the part is amplified, whereby the displacement between the upper structure part 7 and the lower structure part 11 is amplified. Therefore, the deformation of the vibration attenuating means 22 connecting the rocking body 15 and the upper support portion 6 or the lower support portion 10 can be amplified, so that the vibration damping function can be effectively operated from a small deformation of the structure.
Further, since the oscillating body 15 is pivotally connected to both the upper support portion 6 and the lower support portion 10 at a position above or below the intermediate portion between the upper structure portion 7 and the lower structure portion 11, Compared with the one pivoted at the intermediate portion, the oscillating body 15 can be shortened, and the oscillating body 15 can be moved upward or downward from the intermediate portion between the upper structure portion 7 and the lower structure portion 11. Therefore, since the rocking body 15 can be prevented from bending in the out-of-plane direction, it is possible to prevent the vibration damping performance from being lowered.

The invention according to claim 2 is fixed to the upper structure portion 7 and fixed to the lower structure portion 11 and the upper support portion 6 that protrudes below the upper structure portion 7 as shown in FIG. A lower support portion 10 projecting upward from the lower structure 11, and an oscillating body 15 pivotally connected to both the upper support portion 6 and the lower support portion 10.
The oscillating body 15 is pivotally connected to both the upper support portion 6 and the lower support portion 10 at a position above or below a middle portion between the upper structure portion 7 and the lower structure portion 11.
The swing body 15 and the upper structure section 7 or the lower structure section 11 are vibration damping means 22 at a position above or below the pivot position between the upper support section 6 and the lower support section 10 of the swing body 15. It is characterized by being connected via.

  According to the second aspect of the present invention, the effect similar to that of the first aspect is obtained, and the oscillator 15 and the upper structure portion 7 or the lower structure portion 11 are connected via the vibration damping means 22. The structure including the upper structure 7 or the lower structure 11 can be directly damped by the vibration damping means 22.

The invention according to claim 3 is the vibration damping structure according to claim 1 or 2, as shown in FIGS.
Both the upper support portion 6 and the lower support portion 10 are formed in a plate shape,
One of the upper support portion 6 and the lower support portion 10 is longer in the vertical direction than the other, and one is thicker than the other.

  For example, as shown in FIG. 1, the lower support portion 10 is longer in the vertical direction than the upper support portion 6 and is thicker, or as shown in FIG. The upper and lower lengths are longer and the thickness is thicker than the lower support portion 6 '.

According to the third aspect of the present invention, one of the upper support portion 6 and the lower support portion 10 is longer in the vertical direction than the other, so that the front end portion of the lower support portion 10 and the upper support portion 6 Is located above or below the intermediate portion between the upper structure portion 7 and the lower structure portion 11. Therefore, the rocking body 15 is pivotally connected to the distal end portion of the lower support portion 10 and the distal end portion of the upper support portion 6 so that the rocking body 15 is moved from the intermediate portion between the upper structure portion 7 and the lower structure portion 11. In the upper or lower position, the upper support portion 6 and the lower support portion 10 can be reliably pivoted.
Further, since one of the upper support portion 6 and the lower support portion 10 is thicker than the other, one of the upper support portion 6 and the lower support portion 10 fixed to the upper structure portion 7 or the lower structure portion 11. Can be made more rigid than the other. Therefore, the displacement of the upper structure portion 7 or the lower structure portion 11 can be reliably transmitted to the oscillating body 15 by pivotally connecting the oscillating body 15 to one having high rigidity.
Furthermore, by connecting the thin one of the upper support portion 6 and the lower support portion 10 and the rocking body 15 via the vibration damping means 22, it is easy to ensure the thickness of the vibration damping means 22. It becomes.

The invention according to claim 4 is the vibration damping structure according to claim 3, for example, as shown in FIG.
The oscillating body 15 extends toward the other support portion (for example, the upper support portion 6), and the extended portion extends to the other support portion 6 in the vicinity of the upper structure portion 2 or the lower structure portion. It is connected through the vibration damping means 22.

  According to the fourth aspect of the present invention, the extending portion of the rocking body 15 is, for example, in the vicinity of the upper structure portion 2 which is a main structure portion of a highly rigid building, with the upper support portion 6 being provided with vibration damping means. Therefore, the function of absorbing the seismic force can be exhibited at a position where the deformation due to the seismic force is as small as possible.

The invention according to claim 5 is the vibration damping structure according to any one of claims 1 to 4,
The upper support portion 6 is fixed to the upper ends of the columns 4 and 5 that constitute the upper structure portion 7 and face each other, and the lower support portion 10 is fixed to the lower ends of the columns 4 and 5. It is characterized by that.

  According to the fifth aspect of the present invention, since the load of the structure above the rocking body 15 can be transmitted downward through the columns 4 and 5, the pivoting portion (the pivoting shaft of the rocking body 15). It is possible to prevent a large load from acting on 16, 18) from above. Accordingly, the upper structure portion 7 and the lower structure portion 11 are displaced to the left and right, and the upper support portion 6 and the lower support portion 10 are displaced to the left and right accordingly. When swinging like a pendulum around the center between the positions, it can swing smoothly.

The invention according to claim 6 is the vibration damping structure according to any one of claims 1 to 5, for example, as shown in FIG.
A plurality of the oscillating bodies 15, 15 are provided in parallel.

  According to the invention described in claim 6, since the damping capacity can be adjusted by setting the number of the oscillating bodies 15, it is possible to provide a damping structure that matches the size and shape of the structure. .

The invention according to claim 7 is the vibration damping structure according to any one of claims 1 to 6, for example, as shown in FIGS.
The vibration damping means 22 and 30 are formed of a viscoelastic body.

  According to the seventh aspect of the present invention, the energy absorption performance of the viscoelastic bodies 22 and 30 is proportional to the amount of deformation, so that the energy of the earthquake can be absorbed more efficiently and a large damping force can be exhibited.

  An eighth aspect of the present invention is the vibration damping structure according to the seventh aspect, wherein the viscoelastic bodies 22 and 30 are made of silica with respect to 100 parts by weight of a base rubber having a C—C bond in the main chain. ˜150 parts by weight is added, and 10 to 30% by weight of the silane compound is added to the silica.

  According to the invention described in claim 8, since the viscoelastic bodies 22 and 30 can have appropriate strain dependency, frequency dependency, and temperature dependency, the vibration damping function, that is, the damping function can be sufficiently obtained. It can be demonstrated.

According to the present invention, the upper support portion fixed to the upper structure portion, the lower support portion fixed to the lower structure portion, and the swinging body pivoted to both the upper support portion and the lower support portion are provided. Since the oscillating body and the upper support portion or the lower support portion are connected via the vibration damping means, the vibration damping means connecting the oscillating body and the upper support portion or the lower support portion. Therefore, the vibration damping function can be effectively used from the small deformation of the structure.
Further, since the rocking body is pivoted to both the upper support portion and the lower support portion at a position above or below the middle portion between the upper structure portion and the lower structure portion, the pivot body is pivoted at the middle portion. Compared to the above, the oscillating body can be shortened, and the oscillating body can be moved upward or downward from the intermediate portion between the upper structure portion and the lower structure portion. Therefore, since the swinging body can be prevented from bending in the out-of-plane direction, it is possible to prevent the vibration damping performance from being lowered.

Embodiments of the present invention will be described below with reference to the drawings.
(First embodiment)
1 to 4 show a first embodiment. In FIG. 1, the code | symbol 1 has shown the framework of the building which is an example of a structure. The frame 1 includes an upper beam 2, a lower beam 3, a column 4, and an intermediary column 5, and a vibration damping structure is incorporated in a frame surface surrounded by the upper beam 2, the lower beam 3, the column 4, and the intercolumn 5. ing.
That is, as shown in FIGS. 1 and 2, an upper support portion 6 is provided in the frame surface, and the upper support portion 6 is fixed to the upper structure portion 7 so as to protrude downward. ing. The upper structure portion 7 includes the upper beam 2, the upper end portion of the column 4, and the upper end portion of the intermediary column 5. The upper support 6 is formed of a substantially isosceles triangular plate-like iron plate, and two corners are respectively fixed to the upper ends of the columns 4 and the inter-columns 5. Brackets 8 and 8 are provided at the upper ends of the pillars 4 and the spacers 5, respectively, and both corners of the upper support part 6 are fixed to the brackets 8 and 8 by bolting. Further, the upper support portion 6 has a plate 6a that integrally extends upward from the central portion of the upper side thereof, and the upper end portion of the plate 6a is fixed to the upper beam 2 by bolting. In this way, the upper support 6 is fixed to the upper end of the column 4, the upper end of the intermediary column 5, and the center of the upper beam 2.

Further, as shown in FIG. 1, a lower support portion 10 is provided in the frame surface, and the lower support portion 10 is fixed to the lower structure portion 11 so as to protrude upward. The lower structure portion 11 includes the lower beam 3, the lower end portion of the column 4, and the lower end portion of the intermediary column 5. The lower support portion 10 is formed of a structural panel for construction having a substantially isosceles triangular plate shape, and the lower side portion is fixed to the lower structure portion 11 as follows. That is, brackets 12 and 12 are provided at the lower ends of the pillars 4 and the inter-columns 5, respectively, and both ends of the frame 13 are fixed to the brackets 12 and 12 by bolting. A central portion of the frame 13 extends downward, and a portion extending downward is fixed to the lower beam 3 by bolting. A lower side portion of the lower support portion 10 is fixed to the upper surface of the frame 13.
The lower support portion 10 is formed by forming a substantially isosceles triangular frame by a plurality of iron frames 10a and attaching face members 10b, 10b formed of structural plywood to both sides of the frame. . By fixing the frame 10 a constituting the lower side portion of the lower support portion 10 to the upper surface of the frame 13, the lower support portion 10 is fixed to the lower structure portion 11 through the frame 13.
Further, the vertical length of the lower support portion 10 is longer than the vertical length of the upper support portion 6, and the thickness of the lower support portion 10 is also thicker than the thickness of the upper support portion 6. Since the lower support portion 10 is a plate-like member in which face members 10b, 10b formed of a structural plywood are attached to both surfaces of a frame body formed of an iron frame 10a, it has a very high rigidity. ing.

Further, as shown in FIGS. 1 and 2, a rocking body 15 is provided in the frame surface, and the rocking body 15 is pivotally connected to both the upper support portion 6 and the lower support portion 10. .
That is, the rocking body 15 is composed of two rocking plates 15a and 15a. The oscillating plates 15a and 15a are each formed of a vertically long hexagonal plate-like iron plate, and these oscillating plates 15a and 15a are opposed to each other in parallel. The swing plates 15a and 15a are arranged so as to sandwich the upper support portion 6 with a predetermined gap therebetween, and a pivot shaft 16 is inserted into the lower ends of the swing plates 15a and 15a.
On the other hand, the lower surface of the connecting member 17 is fixed to the frame 10a at the upper end of the lower support portion 10, and the connecting member 17 is inserted between the swing plates 15a and 15a. The connecting shaft 17 is inserted into the connecting shaft 16, and the swinging body 15 is rotatable about the connecting shaft 16. The hole through which the pivot shaft 16 is inserted is an elongated hole that is long in the vertical direction, thereby releasing the upward movement of the pivot shaft 16 when the swing body 15 swings.
A pivot shaft 18 is inserted into the lower end of the swing plates 15a, 15a at a position above the pivot shaft 16. On the other hand, the pivot shaft 18 is inserted into the lower end portion of the upper support portion 6, and the oscillating body 15 is rotatable about the pivot shaft 18. In addition, spacers 19 and 19 are interposed between the upper support portion 6 and the swing plates 15a and 15a, and the pivot shaft 18 is inserted into the spacers 19 and 19 as well. These spacers 19 and 19 are for maintaining the spacing between the swing plates 15a and 15a at a predetermined length.
As described above, the oscillating body 15 is pivotally connected to both the upper support portion 6 and the lower support portion 10 at a position above the intermediate portion between the upper structure portion 7 and the lower structure portion 11.

Further, the swing body 15 and the upper support portion 6 are vibration damping means at a position higher than the pivot position between the upper support portion 6 and the lower support portion 10 of the swing body 15 (positions of the pivot shafts 18 and 16). It is connected through.
That is, the oscillating body 15 extends to the upper support portion 6 side, and the extending portion is connected to the other support portion 6 in the vicinity of the upper structure portion 2 via the vibration damping means. .
Plates 20 and 20 are attached by bolts 21 and 21 to upper back surfaces of the rocking plates 15a and 15a, that is, upper opposing surfaces, respectively, and the plates 20 and 20 have a rectangular plate-like viscoelasticity. The bodies (vibration damping means) 22 and 22 are fixed by vulcanization adhesion or adhesive.
Further, plates 23, 23 are fixed to the upper support portion 6 by bolts 24, 24, and the viscoelastic bodies 22, 22 are fixed to the plates 23, 23 by vulcanization adhesion or adhesive.

Further, a long hole 25 which is long in the lateral direction is formed in the vicinity of the viscoelastic bodies 22 and 22 in the center portion of the upper support portion 6. It is inserted from the moving plate 15a toward the other swinging plate 15a. Further, a plurality of spacers 27 are interposed between the lower ends of the plates 20, 20, and the spacers 27 are inserted through the long holes 25. Also, the bolts 26 are inserted through the spacers 27. These spacers 27... Are for maintaining the spacing between the swing plates 15a, 15a at a predetermined length. Further, since the spacers 27 are inserted into the long holes 25 formed in the upper support portion 6, even if the spacers 27 are moved by the rocking body 15 oscillating, the spacers 27. The size of the long hole 25 is set so as to be moved at.
The spacing between the rocking plates 15 and 15 is kept constant by the spacers 27 and the bolts 26, so that the thickness of the viscoelastic bodies 22 and 22 is kept constant. .

In the vibration damping structure as described above, first, the frame 1 of the building is deformed left and right due to the earthquake vibration. In this case, the upper structure portion 7 and the lower structure portion 11 are displaced left and right, and accordingly, the upper support portion 6 and the lower support portion 10 are displaced left and right. Then, as shown in FIG. 3, the pivot shafts 18 and 16 that pivot the swinging body 15 to both the upper support portion 6 and the lower support portion 10 are displaced to the left and right (displacement amount L1).
When the pivoting shafts 18 and 16 are displaced to the left and right, the swinging body 15 swings like a pendulum around the center between the two pivoting positions (positions of the pivoting shafts 18 and 16). The end of the oscillating body 15 is displaced by amplifying the vibration (displacement amount L2), whereby the displacement between the upper structure portion 7 and the lower structure portion 11 is amplified.
Therefore, since the deformation of the viscoelastic body (vibration damping means) 22 connecting the rocking body 15 and the upper support portion 6 can be amplified, the vibration damping function can be effectively operated from the small deformation of the skeleton 1. In the case shown in FIG. 3, when the interlayer displacement is L1, the displacement amount of the viscoelastic body 22 is as large as L2, and the displacement of about 195% is amplified. In the case shown in FIG. 4, when the interlayer displacement is L3, the displacement amount of the viscoelastic body 22 is as large as L4, and the displacement of about 257% is amplified.
Further, by adjusting the distance between the pivot shafts 18 and 16 and the distance between the pivot shaft 18 and the viscoelastic body 22, the amount of displacement can be increased while using the same viscoelastic body 22. It can be adjusted easily.
Furthermore, since the deformation speed of the viscoelastic body 22 can be amplified more than the deformation speed of the skeleton 1, energy can be absorbed more efficiently by the viscoelastic body 22 whose energy absorption performance is proportional to the deformation speed, and a large damping force. Can be demonstrated.
Further, the spacing between the rocking plates 15 and 15 is kept constant by the spacers 27... And the bolts 26, so that the thickness of the viscoelastic bodies 22 and 22 is kept constant. When the viscoelastic bodies 22 and 22 are deformed, the thickness thereof is kept constant, and since it does not become thin or thick, energy due to seismic force can be absorbed reliably.

Further, since the rocking body 15 is pivotally connected to both the upper support portion 6 and the lower support portion 10 at a position above the intermediate portion between the upper structure portion 7 and the lower structure portion 11, Compared to the pivoted structure, the swinging body 15 can be shortened, and the swinging body 15 can be moved upward from the intermediate portion between the upper structure portion 7 and the lower structure portion 11. Therefore, since the rocking body 15 can be prevented from bending in the out-of-plane direction, it is possible to prevent the vibration damping performance from being lowered.
Further, since the lower support portion 10 is longer than the upper support portion 6 in the vertical direction, the front end portion (upper end portion) of the lower support portion 10 and the front end portion (lower end portion) of the upper support portion 6 are It is located above the middle part between the structure part 7 and the lower structure part 11. Therefore, the swinging body 15 is pivotally connected to the distal end portion of the lower support portion 11 and the distal end portion of the upper support portion 6, so that the swinging body 15 is moved from the intermediate portion between the upper structure portion 7 and the lower structure portion 11. In the upper direction, it can be reliably pivoted to both the upper support portion 6 and the lower support portion 11.
Moreover, since the lower support part 10 is formed by the structural panel for construction, and is thicker than the upper support part 6, the rigidity of the lower support part 10 can be made larger than the upper support 6. FIG. Therefore, the displacement of the lower structure portion 11 can be reliably transmitted to the oscillating body 15 by pivotally connecting the oscillating body 15 to the lower support portion 10 having high rigidity.
Furthermore, since the extension part of the rocking body 15 is connected to the upper support part 6 via the vibration damping means 22 in the vicinity of the upper structure part 2 which is a main structure part of a highly rigid building, deformation due to seismic force is caused. The function to absorb the seismic force can be exhibited at the position where it receives as little as possible.

  Further, since the upper support portion 6 is fixed to the pillars 4 and 5, the load of the structure above the rocking body 15 can be transmitted downward through the pillars 4 and 5. It is possible to prevent a large load from acting on the 15 pivot portions (the pivot shafts 18 and 16) from above. Accordingly, the upper structure portion 7 and the lower structure portion 11 are displaced to the left and right, and the upper support portion 6 and the lower support portion 10 are displaced to the left and right accordingly. When swinging like a pendulum around the center between the positions, it can swing smoothly.

(Second Embodiment)
FIG. 5 shows a second embodiment. In the first embodiment, the upper support portion 6 is composed of a small triangular iron plate, and the lower support portion 10 is composed of a large triangular structural panel. However, the second embodiment Then, the upper support part and the lower support part are arranged as reversed ground.
That is, the lower support portion 6 'is composed of a small triangular iron plate, and the upper support portion 10' is composed of a large triangular structural panel for building. In this case, the oscillating body 15 is pivotally connected to both the upper support portion 10 ′ and the lower support portion 6 ′ at a position below the intermediate portion between the upper structure portion 7 and the lower structure portion 11. The swinging body 15 and the lower support part 6 ′ are connected via a viscoelastic body (vibration damping means) 22 at a position below the pivot position between the upper support part 10 ′ and the lower support part 6 ′. .
The lower support portion 6 ′ is the same as the upper support portion 6 in FIG. 1 but has a different mounting position and mounting direction. Further, the upper support portion 10 'is the same as the lower support portion 10 in FIG. 1, but the mounting position and the mounting direction are different.
The connection structure between the upper support portion 10 'and the upper structure portion 7 and the connection structure between the lower support portion 6' and the lower structure portion 11 are the connection between the lower support portion 10 and the lower structure portion 11 in FIG. Since it is the same as the connection structure of the upper support portion 6 and the upper structure portion 7, the same reference numerals are given and description thereof is omitted.
In the present embodiment, the same effect as in the first embodiment can be obtained.

(Third embodiment)
FIG. 6 shows a third embodiment. In the first embodiment, the upper support portion 6 is composed of a small triangular iron plate, and the lower support portion 10 is composed of a large triangular structural panel, but in this embodiment, The lower support part 10 is constituted by a large rectangular structural panel for construction.
As the structural panel constituting the lower support portion 10, for example, a wall panel used in a panel method can be used. This wall panel is obtained by assembling reinforcing bars inside a frame formed by assembling the eaves into a rectangular frame shape and attaching a face material made of a structural plywood on both sides of the frame.
Such a lower support part 10 sets the dimension of the horizontal direction so that the predetermined clearance S may be formed between the pillar 4 and the intermediate pillar 5. The gap S is such that the pillar 4 and the inter-column 5 do not hit the lower support portion 10 when the framework 1 is deformed by an earthquake.
The connection structure between the upper support portion 6 and the upper structure portion 7 and the connection structure between the lower support portion 10 and the lower structure portion 11 are the same as those in the first embodiment, and thus the same reference numerals are given. The description is omitted.
In the present embodiment, the same effects as those of the first embodiment can be obtained, and the rigidity of the lower support portion 10 can be increased, so that the displacement of the lower structure portion 11 can be reliably transmitted by the oscillator 15. There is an advantage that can be.

(Fourth embodiment)
FIG. 7 shows a fourth embodiment. In the third embodiment, the upper support portion 6 is constituted by a small triangular iron plate, and the lower support portion 10 is constituted by a large quadrangular building structural panel. The fourth embodiment Then, the upper support part and the lower support part are arranged as reversed ground.
That is, the lower support portion 6 'is composed of a small triangular iron plate, and the upper support portion 10' is composed of a large square structural panel for construction. In this case, the oscillating body 15 is pivotally connected to both the upper support portion 10 ′ and the lower support portion 6 ′ at a position below the intermediate portion between the upper structure portion 7 and the lower structure portion 11. The swinging body 15 and the lower support part 6 ′ are connected via a viscoelastic body (vibration damping means) 22 at a position below the pivot position between the upper support part 10 ′ and the lower support part 6 ′. .
The lower support portion 6 ′ is the same as the upper support portion 6 in FIG. 6 but has a different mounting position and mounting direction. Further, the upper support portion 10 ′ is the same as the lower support portion 10 in FIG. 6 but has a different mounting position and mounting direction.
The connection structure between the upper support portion 10 ′ and the upper structure portion 7 and the connection structure between the lower support portion 6 ′ and the lower structure portion 11 are the same as those of the lower support portion 10 and the lower structure portion 11 in FIGS. 1 and 6. And the connection structure between the upper support portion 6 and the upper structure portion 7 are the same as those in FIG.
In the present embodiment, the same effect as that of the third embodiment can be obtained.

(Fifth embodiment)
FIG. 8 shows a fifth embodiment. In the present embodiment, similarly to the third embodiment shown in FIG. 6, the lower support portion 10 is configured with a large rectangular structural panel for construction.
However, this embodiment differs from the third embodiment in that two oscillating bodies 15 are provided in parallel. This will be described below.
The upper support portion 6 is formed of a horizontally long rectangular plate-shaped iron plate, and two upper corner portions are fixed to brackets 8 and 8 provided at the upper ends of the pillar 4 and the intermediate pillar 5 by bolting, respectively. ing. The upper support 6 is fixed to the upper beam 2 with bolts at the upper ends of the plates 6a and 6a. In this way, the upper support portion 6 is fixed to the upper end portion of the column 4, the upper end portion of the inter-column 5, and the upper beam 2.

In addition, in the frame surface surrounded by the upper beam 2, the lower beam 3, the column 4, and the interposition column 5, two oscillating bodies 15, 15 are provided in parallel on the left and right sides. Both the support part 6 and the lower support part 10 are pivotally connected in the same manner as in the first embodiment.
That is, in the present embodiment, since there are two oscillating bodies 15, each oscillating body 15 is located above the intermediate portion between the upper structure portion 7 and the lower structure portion 11, and the upper support portion 6 and the lower support portion 6. Both the support part 10 and the support part 10 are pivoted by pivot axes 18 and 16. In addition, the two oscillating bodies 15 and 15, the upper support section 6, and the pivot position between the upper support section 6 and the lower support section 10 of the oscillating body 15 (positions of the pivot shafts 18 and 16). Are connected via viscoelastic bodies (vibration damping means) 22 and 22.

In such a damping device, damping is performed in the same manner as in the first embodiment. However, since there are two oscillating bodies 15 in parallel on the left and right, the balance is excellent and the damping capability Is larger than that of the first embodiment.
Further, by adjusting the size and the number of the upper support portions 6, it is possible to obtain a vibration control structure that matches the size and shape of the structure.

(Sixth embodiment)
FIG. 9 shows a sixth embodiment. In the fifth embodiment, the upper support portion 6 is composed of a small rectangular iron plate, and the lower support portion 10 is composed of a large rectangular structural panel. However, the sixth embodiment Then, the upper support part and the lower support part are arranged as reversed ground.
That is, the lower support portion 6 'is composed of a small quadrangular iron plate, and the upper support portion 10' is composed of a large quadrangular architectural structural panel. In this case, the oscillating bodies 15 and 15 are pivotally connected to both the upper support portion 10 ′ and the lower support portion 6 ′ at a position lower than the intermediate portion between the upper structure portion 7 and the lower structure portion 11. At a position below the pivotal position between the upper support portion 10 ′ and the lower support portion 6 ′ of the moving body 15, the rocking body 15 and the lower support portion 6 ′ are connected via a viscoelastic body (vibration damping means) 22. ing.
The lower support portion 6 ′ is the same as the upper support portion 6 in FIG. 8 but has a different mounting position and mounting direction. Further, the upper support portion 10 ′ is the same as the lower support portion 10 in FIG. 8 but has a different mounting position and mounting direction.
The connection structure between the upper support portion 10 ′ and the upper structure portion 7 and the connection structure between the lower support portion 6 ′ and the lower structure portion 11 are the connection between the lower support portion 10 and the lower structure portion 11 in FIG. Since it is the same as the connection structure of the upper support portion 6 and the upper structure portion 7, the same reference numerals are given and description thereof is omitted.
In the present embodiment, the same effect as in the sixth embodiment can be obtained.

In the above-described embodiment, the oscillating body 15 and the upper support portion or the lower support portion are connected via the viscoelastic body (vibration damping means) 22. However, instead of or in addition to this, Thus, the oscillating body 15 and the upper structure portion 7 or the lower structure portion 11 may be connected via a viscoelastic body (vibration damping means).
For example, as shown in FIG. 1, the upper end of the oscillating body 15 and the upper beam 2 may be connected by a viscoelastic body (vibration damping means) 30. In this case, the viscoelastic body 22 may be provided as necessary, and the viscoelastic body 22 may be omitted if the viscoelastic body 30 can sufficiently perform vibration suppression.

(Seventh embodiment)
10 and 11 show a seventh embodiment. The main differences between the vibration damping structure shown in these drawings and the vibration damping structure shown in FIG. 1 are the shape of the rocking body and the structure of the part that connects the rocking body and the upper support part. The same parts as those shown in FIG. 1 are denoted by the same reference numerals, and the description thereof is simplified or omitted.

As shown in FIGS. 10 and 11, the rocking body 35 is composed of two rocking plates 35a and 35a. Each of the swing plates 35a and 35a is formed of a vertically long iron plate that is formed wider as it goes downward, and its lower end is pointed at an obtuse angle. The rocking plates 35a and 35a are arranged to face each other in parallel, and are arranged so that a part of the upper support portion 6 is sandwiched between them.
The pivot shaft 16 is inserted through the lower end portions of the swing plates 35a and 35a. On the other hand, the lower surface of the connecting member 17 is fixed to the frame 10a at the upper end of the lower support portion 10, and the connecting member 17 is inserted between the swing plates 35a and 35a. The pivot shaft 16 is inserted into the connecting member 17, and the swinging body 35 is rotatable about the pivot shaft 16. The hole through which the pivot shaft 16 is inserted is an elongated hole that is long in the vertical direction, so that the pivot shaft 16 is slightly moved upward when the rocking body 35 is swung.
Further, the pivot shaft 18 is inserted into the lower end portions of the swing plates 35a, 35a at a position above the pivot shaft 16. On the other hand, the pivot shaft 18 is inserted into the lower end portion of the upper support portion 6, and the swinging body 35 is rotatable about the pivot shaft 18.
As described above, the oscillating body 35 is pivotally connected to both the upper support portion 6 and the lower support portion 10 at a position above the intermediate portion between the upper structure portion 7 and the lower structure portion 11.

In addition, the swinging body 35 and the upper support portion 6 are provided with vibration damping means at a position above the pivot position (position of the pivot shafts 18 and 16) between the upper support portion 6 and the lower support portion 10 of the swing body 35. It is connected through.
That is, the rocking plates 35 a and 35 a constituting the rocking body 35 extend toward the upper support portion 6, and the upper end portion of the rocker plates 35 a and 35 a protrudes from the opening 36 formed in the upper support portion 6.
On the other hand, the opening 36 is provided with a damping component 37 having viscoelastic bodies (vibration damping means) 22 and 22. The damping component 37 includes a vertically-long rectangular iron plate 38, a pair of horizontally-long rectangular iron plates 39 and 39 that are spaced apart so as to sandwich the plate 38, and between the plate 38 and the plates 39 and 39. Viscoelastic bodies 22 and 22 are provided. The viscoelastic bodies 22 and 22 are formed in a rectangular plate shape, and are fixed to the plate 38 and the plates 39 and 39 by an adhesive or vulcanization adhesion. The plate 38 has the same thickness as the upper support portion 6, and the lower end portion of the plate 38 is sandwiched between the upper end portions of the swing plates 35 a, 35 a, and the upper end portions of the swing plates 35 a, 35 a It is connected by bolts 40. Further, the viscoelastic bodies 22 and 22 are set to have a thickness that protrudes from the surface of the upper support portion 6 in a state where the plate 38 is disposed in the opening 36.

  Further, both end portions of the plates 39, 39 project laterally from the opening 36, and the projecting portions sandwich the upper support portion 6 and separate the upper support portion 6 from a predetermined gap. That is, since the viscoelastic bodies 22 and 22 protrude from the surface of the upper support portion 6, the plates 39 and 39 fixed to the surfaces of the viscoelastic bodies 22 and 22 are the protrusions of the viscoelastic bodies 22 and 22. The upper support part 6 is spaced apart. The plates 39 and 39 are connected to the upper support portion 6 by bolts 42 with spacers inserted in the gaps. The bolt 42 inserted into one plate 39 passes through the spacer, passes through the upper support 6, further passes through the spacer, is inserted into the other plate 39, and is screwed into the nut. The plates 39 and 39 are fixed to the upper support portion 6 by tightening. And the thickness of the viscoelastic bodies 22 and 22 is kept constant by such spacers, bolts 42... And plates 39 and 39.

In the present embodiment, the following effects can be obtained as well as the same effects as those of the first embodiment.
That is, since the viscoelastic bodies 22 and 22 as vibration damping means for connecting the rocking body 35 and the upper support portion 6 are incorporated as the vibration damping parts 37 having the vibration damping means 37, the viscoelastic bodies 22 and 22 are installed on the site. 35 and the upper support 6 can be easily attached. Further, since the vibration damping component 37 is manufactured in advance at a factory or the like, the viscoelastic bodies 22 and 22 can be securely fixed to the plates 38 and 39 with high accuracy.
Further, since the opening 36 is formed in the upper support portion 6 and the plate 38 constituting the vibration damping component 37 is disposed in the opening 36, the rocking body 35 and the upper support portion 6 when the vibration damping component 37 is incorporated. The thickness of the portion connecting the two can be suppressed. That is, in the first embodiment, the plate 23 is fixed to both surfaces of the upper support portion 6, the viscoelastic body 22 is fixed to the plate 23, and the plate 20 is fixed to the viscoelastic body 22. Since 20 is fixed to the swing plate 15a, the thickness of the portion connecting the swing body 15 and the upper support portion 6 is two plates 20, 20, two viscoelastic bodies 22, 22, and two sheets. The total thickness of the plates 23, 23, the upper support 6 and the two swing plates 15a, 15a is nine, but in the present embodiment, the plate 38 and the two viscoelastic bodies 2 and the thickness of the two plates 39, 39, so that the thickness of the portion connecting the oscillating body 35 and the upper support portion 6 can be suppressed. The vibration structure can be easily placed in the wall of the building.

  The viscoelastic bodies 22 and 30 used in the vibration damping structures of the first to seventh embodiments are composed of 100 to 150 silica with respect to 100 parts by weight of the base rubber having a C—C bond in the main chain. It is formed of a high damping rubber in which 10 parts by weight of a silane compound is added to the silica.

Below, a viscoelastic material is demonstrated.
A general viscoelastic material increases in rigidity and resistance as the amplitude increases. If a viscoelastic body having the property that the rigidity increases as the amplitude increases, the acceleration response of the building and the stress of each part are excessively increased. Therefore, it is desirable to use a viscoelastic body having a property that the increase in rigidity reaches a peak even when the amplitude increases. In particular, in the present invention, since the viscoelastic body is subjected to a large shear deformation as compared with the amplitude of the vibration acting on the building, the effect of using the above-mentioned property with respect to strain dependency is great.

Also, since it is necessary to function in a wide range of amplitudes from environmental vibrations such as traffic vibrations to wind fluctuations during typhoons and large earthquakes, viscoelastic bodies with low strain dependence are used. That is, a material that exhibits stable vibration energy absorption capability from a small strain to a large strain is used.
Specifically, a stable energy absorption capability of Heq> 0.20 is required in the region of 0.01 ≦ γ ≦ 3.5. Therefore, Keq / (S / D) decreases as γ increases in a region where γ> 1.0 so that the resistance force does not increase in the large amplitude region. For example, 0.45 ≦ { It is preferable to use a viscoelastic body of Keq / (S / D) _{(γ = 3.0)} } / {Keq / (S / D) _{(γ = 1.0)} } <0.75.

Here, γ is a shear strain rate, and is obtained by dividing the shear deformation amount d of the viscoelastic body by the height t of the viscoelastic body, as shown in FIG. The equivalent viscous damping coefficient (equivalent damping constant) (Heq) and the equivalent shear modulus (Geq = Keq / (S / D)) in the dynamic viscoelasticity test are sine waves that cause shear deformation of the viscoelastic material. Excitation is performed, a history loop (hysteresis curve) at that time is measured, and calculation is performed based on the result. If it demonstrates based on FIG. 13, Heq is a numerical value calculated by the following formula (Formula 1), and Keq / (S / D) is a numerical value calculated by the following formula (Formula 2).
Heq = ΔW / 2πW (Equation 1),
W: elastic energy of shear deformation (area of two triangles shown in FIG. 12, unit is kgf · cm),
ΔW = total energy absorbed by shear deformation (area surrounded by hysteresis curve shown in FIG. 12, unit is kgf · cm),
Keq / (S / D) = F / U _pressure / (S / D) (Equation 2),
F: Load when giving maximum displacement (unit is kgf),
U _Be : Maximum displacement (unit: cm),
S / D: Shape factor of the test sample (sample shear area / sample shear gap, unit is cm)

In general viscoelastic materials, Geq (= Keq / (S / D)) [N / mm ² ] significantly increases with an increase in vibration frequency. For example, in a general viscoelastic body, at 20 ° C., the value of Geq increases 2 to 3 times at 0.1 Hz and at 2.0 Hz. The dominant frequency of traffic vibration is distributed between 4Hz and 7Hz, and the ground vibration is distributed between 0.1Hz and 20Hz, so viscoelasticity has relatively stable properties in terms of rigidity and damping performance against these frequencies. It is desirable to use the body. Specifically, it is necessary to deal with earthquake motions that have a wider input frequency distribution region. The damping performance imparted to the house by the damping material is generally the product of the rigidity of the damping material (here, the equivalent shear modulus (Geq)) and the damping constant (here, the equivalent viscous damping constant (equivalent damping constant) Heq). Can be expressed as Evaluation of frequency dependence may be performed within a range of ± 50% within the range of 0.1 Hz to 20 Hz of the above-described ground vibration with reference to the time when the value of the product is a certain frequency under a certain temperature condition. .

In general, viscoelastic bodies have high rigidity at low temperatures and low rigidity at high temperatures. In Japan, it is desirable to use a viscoelastic body having a relatively stable property in terms of rigidity and damping performance over a temperature range of about −10 ° C. to 40 ° C. since the temperature changes greatly throughout the year.
For example, if the use environment of the vibration damping structure according to the present invention is −10 ° C. to 40 ° C., the equivalent shear modulus when the low temperature side is −10 ° C. is based on Geq (equivalent shear modulus) at 20 ° C. Ratio of Geq (t = −10 ° C.) to equivalent shear modulus Geq (t = 20 ° C.) at 20 ° C., Geq (t = −10 ° C.) / Geq (t = 20 ° C.) ≦ 2.2 The high temperature side is the ratio of the equivalent shear modulus Geq (t = 40 ° C.) at 40 ° C. to the equivalent shear modulus Geq (t = 20 ° C.) at 20 ° C., Geq (t = 40 ° C.) / It is preferable that Geq (t = 20 ° C.) ≧ 0.6.

In the present embodiment, the viscoelastic body has, for example, silica based on 100 parts by weight of the base rubber having a C—C bond in the main chain in order to have the above-described strain dependency, frequency dependency, and temperature dependency. 100 to 150 parts by weight is added, and a high damping rubber containing 10 to 30% by weight of a silane compound based on the silica is used. As an example of such a suitable viscoelastic body, 135 parts by weight of silica is added to 100 parts by weight of the base rubber, and 17% by weight of a silane compound is added to the silica. According to this viscoelastic body, the above-described strain dependency, frequency dependency, and temperature dependency can be provided, and the function of the above-described vibration damping structure can be sufficiently exhibited.
In particular, the performance at 20 ° C. is in the range of Heq ≧ 0.2, 0.35 ≦ Geq ≦ 6.0 (N / mm ² ), and the temperature dependence of Geq is −10 ° C./20° C. ≦ 2.2, 40 ° C./20° C. ≧ 0.6 (both at a frequency of 0.1 Hz and a shear strain of ± 100%), and as described above, the viscoelastic body of the damping member is greatly shear deformed. The functions of the vibration damping structure can be fully exhibited.

〔式中、R¹、R²、R³およびR⁴のうち少なくとも１つはアルコキシ基、またはハロゲン原子を示し、他は同一または異なって水素原子、アルキル基またはアリール基を示す。〕で表されるシラン化合物とを含有するゴム組成物の加硫成形により形成される。また、基材ゴムとしては、主鎖にC−C結合を有する種々のゴムがいずれも使用可能である。具体的には天然ゴム（NR）の他、イソプレンゴム（IR）、ブタジエンゴム（BR）、スチレン−ブタジエン共重合ゴム（SBR）、エチレン−プロピレン共重合ゴム（EPM）、アクリロニトリル−ブタジエン共重合ゴム（NBR）、ブチルゴム（IIR）などが挙げられる。これらはそれぞれ単独で使用される他、２種類以上を併用することもできる。 The silane compound has the following general formula:

[Wherein, at least one of R ¹ , R ² , R ³ and R ⁴ represents an alkoxy group or a halogen atom, and the other represents the same or different and represents a hydrogen atom, an alkyl group or an aryl group. It is formed by vulcanization molding of a rubber composition containing a silane compound represented by the formula: As the base rubber, any of various rubbers having a C—C bond in the main chain can be used. Specifically, in addition to natural rubber (NR), isoprene rubber (IR), butadiene rubber (BR), styrene-butadiene copolymer rubber (SBR), ethylene-propylene copolymer rubber (EPM), acrylonitrile-butadiene copolymer rubber. (NBR), butyl rubber (IIR) and the like. These may be used alone or in combination of two or more.

As the silica added to the base rubber, various hydrophilic or hydrophobic silicas used as rubber reinforcing agents can be used. The addition amount of the silica is limited to 10 to 150 parts by weight with respect to 100 parts by weight of the base rubber. The reason for this is as described above.
In the silane compound represented by the general formula (1), examples of the alkoxy group corresponding to R ^{1 to} R ⁴ include those having various carbon numbers represented by C _n H _{2n + 1} O. Preferable examples include methoxy and ethoxy having 1 to 2 carbon atoms. Examples of the halogen atom include fluorine, chlorine, bromine and the like.

Examples of the alkyl group include those having various carbon numbers represented by C _n H _{2n + 1} , and the carbon number is particularly preferably about 1 to 20. Examples of the alkyl group include methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, secondary butyl, tertiary butyl, pentyl, hexyl, octyl, nonyl, decyl, undecyl, dodecyl and the like. It is done.
Examples of the aryl group include phenyl, tolyl, xylyl, biphenyl, o-terphenyl, naphthyl, anthryl, phenanthryl and the like. Specific examples of such silane compounds include, but are not limited to, n-hexyltrimethoxysilane, triethoxyphenylsilane, diethoxydimethylsilane, dimethyldichlorosilane, methyldichlorosilane, and the like.

  In addition to the above, the rubber composition includes, for example, a vulcanizing agent, a vulcanization accelerator, a vulcanization acceleration aid, a vulcanization retarder, a reinforcing agent other than silica, a filler, a softening agent, a plasticizer, and a tackifier. In addition, various additives may be added. Among these, examples of the vulcanizing agent include sulfur, organic sulfur-containing compounds, and organic peroxides. Among these, examples of the organic sulfur-containing compound include N, N′-dithiobismorpholine. Examples of organic peroxides include benzoyl peroxide and dicumyl peroxide.

  Examples of the vulcanization accelerator include thiuram vulcanization accelerators such as tetramethylthiuram disulfide and tetramethylthiuram monosulfide, zinc dibutyldithiocarbamate, zinc diethyldithiocarbamate, sodium dimethyldithiocarbamate, Dithiocarbamic acids such as tellurium diethyldithiocarbamate, thiazoles such as 2-mercaptobenzothiazole and N-cyclohexyl-2-benzothiazolesulfenamide, thioureas such as trimethylthiourea and N, N′-diethylthiourea Organic promoters, or inorganic promoters such as slaked lime, magnesium oxide, titanium oxide, and risurge (PbO) can be used.

  Examples of the vulcanization acceleration aid include fatty acids such as stearic acid, oleic acid and cottonseed fatty acid, and metal oxides such as zinc white. Examples of the vulcanization retarder include aromatic organic acids such as salicylic acid, phthalic anhydride, and benzoic acid, N-nitrosodiphenylamine, N-nitroso-2,2,4-trimethyl-1,2-dihydroquinone, and N-nitrosophenyl. And nitroso compounds such as -β-naphthylamine.

  The total amount of the vulcanizing agent, vulcanization accelerator, vulcanization acceleration aid and vulcanization retarder is preferably about 4 to 15 parts by weight with respect to 100 parts by weight of the base rubber. Examples of the antioxidant include imidazoles such as 2-mercaptobenzimidazole, phenyl-α-naphthylamine, N, N′-di-β-naphthyl-p-phenylenediamine, and N-phenyl-N′-isopropyl-p-. Examples thereof include amines such as phenylenediamine, and phenols such as di-t-butyl-p-cresol and styrenated phenol.

  The blending amount of the antioxidant is preferably about 1.5 to 5 parts by weight with respect to 100 parts by weight of the base rubber. Carbon black is mainly used as a reinforcing agent other than silica, and inorganic reinforcing agents such as silicate-based white carbon, zinc white, surface-treated precipitated calcium carbonate, magnesium carbonate, talc, clay, or the like. Organic reinforcing agents such as malon indene resin, phenol resin, and high styrene resin (styrene-butadiene copolymer having a high styrene content) can also be used.

Examples of the filler include calcium carbonate, clay, barium sulfate, and diatomaceous earth. The blending amount of the reinforcing agent and / or filler other than silica is preferably about 5 to 50 parts by weight with respect to 100 parts by weight of the base rubber. Examples of the softener include vegetable oil-based, mineral oil-based, and synthetic softeners such as fatty acids (stearic acid, lauric acid, etc.), cottonseed oil, tall oil, asphalt substances, and paraffin wax.
The blending amount of the softening agent is preferably about 10 to 100 parts by weight with respect to 100 parts by weight of the base rubber. Examples of the plasticizer include various plasticizers such as dibutyl phthalate, dioctyl phthalate, and tricresyl phosphate. As for the compounding quantity of a plasticizer, about 5-20 weight part is preferable with respect to 100 weight part of base rubber.
Furthermore, examples of the tackifier include coumarone / indene resin, aromatic resin, aromatic / aliphatic mixed resin, rosin resin, and cyclopentadiene resin. The compounding amount of the tackifier is preferably about 5 to 50 parts by weight with respect to 100 parts by weight of the base rubber.

  In addition to the above, for example, a dispersant, a solvent and the like may be appropriately blended in the rubber composition. The rubber composition is produced by kneading the above components using, for example, a closed kneader. The viscoelastic body is formed, for example, by molding the rubber composition into a sheet shape using a roller head extruder or the like, punching out the sheet so as to have a predetermined shape, and then cutting the punched sheet into a predetermined thickness. Thus, in a state where a plurality of sheets are laminated, they are manufactured by heating and vulcanization molding in a predetermined mold.

  As described above, in the first to sixth embodiments, the viscoelastic bodies 22 and 30 have 100 to 150 parts by weight of silica with respect to 100 parts by weight of the base rubber having a C—C bond in the main chain. Because it is a high-damping rubber containing 10 to 30% by weight of silane compound added to the silica, the viscoelastic bodies 22 and 30 should have appropriate strain dependency, frequency dependency and temperature dependency. Therefore, the vibration damping function, that is, the vibration damping function can be sufficiently exhibited.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a first embodiment of a vibration damping structure according to the present invention, where (a) is a front view and (b) is a side view. FIG. 2 shows the main part of FIG. 1, where (a) is a front view and (b) is a side view. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a first embodiment of a vibration damping structure according to the present invention, and is a front view of a main part showing a state in which a rocking body is swung. It is a front view of the principal part which shows the state which the rocking | fluctuation body rock | fluctuated further similarly. It is a front view which shows 2nd Embodiment of the damping structure which concerns on this invention. It is a front view which shows 3rd Embodiment of the damping structure which concerns on this invention. It is a front view which shows 4th Embodiment of the damping structure which concerns on this invention. It is a front view which shows 5th Embodiment of the damping structure which concerns on this invention. It is a front view which shows 6th Embodiment of the damping structure which concerns on this invention. FIG. 10 is a front view showing a seventh embodiment of a vibration damping structure according to the present invention. FIG. It is a figure which shows the hysteresis loop at the time of performing the sine wave excitation which produces the shear deformation of the viscoelastic body used for the damping structure which concerns on this invention. It is a figure for demonstrating the shear strain rate (gamma) of a viscoelastic body.

Explanation of symbols

6, 10 'Upper support portion 7 Upper structure portion 10, 6' Lower support portion 11 Lower structure portion 15, 35 Oscillator 16, 18 Pivoting shaft 22, 30 Viscoelastic body (vibration damping means)

Claims (8)

An upper support portion fixed to the upper structure portion and projecting downward from the upper structure portion, a lower support portion fixed to the lower structure portion and projecting above the lower structure, and the upper support portion and the lower support portion And an oscillating body pivoted on both sides,
The rocking body is pivotally connected to both the upper support portion and the lower support portion at a position above or below an intermediate portion between the upper structure portion and the lower structure portion,
The swinging body and the upper support part or the lower support part are connected via vibration damping means at a position above or below the pivot position between the upper support part and the lower support part of the swinging body. Damping structure characterized by An upper support portion fixed to the upper structure portion and projecting downward from the upper structure portion; a lower support portion fixed to the lower structure portion and projecting above the lower structure portion; and the upper support portion and the lower support portion An oscillating body pivotally connected to both the support part and
The rocking body is pivotally connected to both the upper support portion and the lower support portion at a position above or below an intermediate portion between the upper structure portion and the lower structure portion,
The swinging body and the upper structure part or the lower structure part are connected via vibration damping means at a position above or below the pivot position between the upper support part and the lower support part of the swinging body. Damping structure characterized by that. In the vibration damping structure according to claim 1 or 2,
Both the upper support part and the lower support part are formed in a plate shape,
One of the upper support part and the lower support part is longer in the vertical direction than the other, and one is thicker than the other. In the vibration damping structure according to claim 3,
The oscillating body extends toward the other support portion, and the extending portion is connected to the other support portion in the vicinity of the upper structure portion or the lower structure portion via the vibration damping means. Damping structure characterized by In the damping structure as described in any one of Claims 1-4,
The damping structure according to claim 1, wherein the upper support portion is fixed to the upper end portions of the columns constituting the upper structure portion and facing each other, and the lower support portion is fixed to the lower end portion of the column. In the damping structure as described in any one of Claims 1-5,
A vibration damping structure, wherein a plurality of the rocking bodies are provided in parallel. In the damping structure as described in any one of Claims 1-6,
A vibration damping structure, wherein the vibration damping means is formed of a viscoelastic body.   8. The vibration damping structure according to claim 7, wherein the viscoelastic body is added with 100 to 150 parts by weight of silica with respect to 100 parts by weight of a base rubber having a C—C bond in the main chain. A vibration damping structure comprising 10 to 30% by weight of a silane compound.

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