JP2005140161A - Damping device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an improved damping device having superior responsiveness and damping function with a simple structure, and being easily installed in a building, and easily maintained. <P>SOLUTION: As a driving mechanism 30 is integrally mounted on an additional mass body 20, the structure is simple, and the damping device can be easily installed in a damped body 10 and easily maintained. Further in a structure where both ends of a wire rope 15 is directly fixed to fixing parts 13L, 13R of the damped body 10, the wire rope 15 is not moved in the displacement direction of the mass additional body 20, and the driving pulley 32 mounted on the mass additional body 20 is engaged with the wire rope 15, whereby the additional mass body 20 can be immediately displaced by rotating the driving pulley 32, and the damping function of high responsiveness can be achieved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a vibration damping device suitable for use in vibration damping of buildings, structures, and the like. More specifically, the present invention has a good damping function with excellent controllability and responsiveness, and provides a driving force to an additional mass body. It is possible to reduce the tension acting on the linear body or belt-shaped body to be transmitted, and to control the displacement of the additional mass body finely to reliably control even minute vibrations of buildings and structures. The present invention relates to an improved vibration damping device.

Conventionally, in a vibration control device for a building or structure, vibration is detected by detecting the direction, frequency, amplitude, etc. of the vibration generated in the building, etc., and displacing the weight used for vibration control using a drive device. There is something to do.
A ball screw is used as a weight driving device in such a vibration damping device, but it is necessary to lengthen the ball screw itself in order to increase the amount of displacement of the weight.
However, when the ball screw is lengthened, the ball screw is buckled or the natural frequency of the ball screw itself is lowered and resonates with the rotation of the ball nut. Therefore, it is difficult to increase the weight displacement. .

Therefore, in the vibration damping device disclosed in Patent Document 1 below, as schematically shown in FIG. 4, the additional mass body 3 is supported on the structure 1 via the roller 2 so as to be horizontally movable. The ends of the wire ropes 6 and 7 extending from the pair of left and right winding drums 4 and 5 each having driving means such as a servo motor are fixed to the side surface of the additional mass body 3 and the winding drums 4 and 5 are rotated. By controlling this, the additional mass body 3 is displaced in the horizontal direction. In the modification schematically shown in FIG. 5, the left winding drum 5 is replaced with a reversing drum 8 having no driving means, and a pressing drum 9 is added to the right winding drum 4, and While winding one wire rope 6 around the winding drum 4 and the reversing drum 8, both ends thereof are fixed to the additional mass body 3, and the rotation of the right winding drum 4 is controlled to control the additional mass body 3. It is designed to be displaced in the horizontal direction.
JP-A-5-59843

However, among the vibration damping devices disclosed in Patent Document 1 described above, in the one shown in FIG. 4, it is difficult to synchronize the left and right winding drums 4 and 5.
Further, in the case shown in FIG. 5, since the elongation generated in the wire rope 6 is different between when the left winding drum 4 is rotated in the forward direction and when rotated in the reverse direction, the additional mass body 3 is made smooth. It is difficult to displace it.
Furthermore, in the one shown in FIG. 4 and the one shown in FIG. 5, the movement amount of the additional mass body 3 and the movement amount of each wire rope 6, 7 are the same. Thereby, not only the tension acting on the wire ropes 6 and 7 is increased, but also the capacity of the driving means for rotationally driving the winding drums 4 and 5 needs to be increased. Furthermore, it becomes difficult to finely control the amount of displacement of the additional mass body 3, and it is not suitable for damping minute vibrations of the structure.

  Accordingly, an object of the present invention is to eliminate the above-mentioned problems of the prior art, have a good damping function with excellent controllability and responsiveness, and transmit a driving force to the additional mass body. Improved vibration control device that can reduce the tension acting on the body, and can control the displacement of the additional mass body finely to reliably control even minute vibrations of buildings and structures. Is to provide.

The means described in claim 1 for solving the above-described problem is as follows.
An apparatus for damping vibration generated in a controlled body by displacing an additional mass body,
Support means for supporting the additional mass body so as to be displaceable in the horizontal direction on the vibration-damped body;
A linear body or a belt-like body stretched between a pair of left and right fixed portions provided on the vibration-damped body;
A driving pulley that is supported on the additional mass body so as to be rotatable about an axis extending in a direction perpendicular to a direction in which the linear body or the belt-like body extends, and that engages with the linear body or the belt-like body in the rotational direction. When,
Drive means mounted on the additional mass body for driving the drive pulley to rotate in both forward and reverse rotation directions.

Further, the means described in claim 2 for solving the above-described problem is:
An apparatus for damping vibration generated in a controlled body by displacing an additional mass body,
Support means for supporting the additional mass body so as to be displaceable in the horizontal direction on the vibration-damped body;
A linear body or a belt-like body constructed between a pair of fixed portions provided on the vibration-damped body;
A driving pulley that is supported on the additional mass body so as to be rotatable about an axis extending in a direction perpendicular to a direction in which the linear body or the belt-like body extends, and that engages with the linear body or the belt-like body in the rotational direction. When,
Driving means mounted on the additional mass body for driving the drive pulley to rotate in both forward and reverse rotation directions;
Fixed pulleys respectively provided at least one each on the pair of fixed parts;
A movable pulley provided at least one on each of the additional mass bodies facing the pair of fixed portions, and the linear body or the belt-like body has the drive pulley at a central portion in a longitudinal direction thereof. And both ends thereof are fixed to the fixed portion or the additional mass body after being wound around the fixed pulley and the movable pulley, respectively.

The fixed pulley and the movable pulley are each provided with one each of the fixed pulleys in the pair of fixing portions, and the movable pulley is provided in the pair of additional mass bodies. One is provided at each of the portions facing the fixed portion, and the linear body or the belt-like body is engaged with the drive pulley at the center in the longitudinal direction, and the both ends thereof are the fixed pulley and the movable pulley, respectively. After being wound around, it can be fixed to the fixing portion.
Alternatively, as described in claim 4, two of the fixed pulleys are provided on each of the pair of fixed portions, and the movable pulley is disposed on each portion of the additional mass body that faces the pair of fixed portions, respectively. The additional mass body is provided after one by one, and the linear body or belt-shaped body is engaged with the drive pulley at the center in the longitudinal direction and both ends thereof are wound around the fixed pulley and the movable pulley, respectively. Can be fixed to.

The supporting means described above can be a rolling element such as a wheel, a roller, a needle roller, or a ball.
The linear body or belt-shaped body can be a wire rope, cable, chain, flat belt, V belt, timing belt (toothed belt), or the like.
The driving means is preferably a motor operated by electric power, a step motor, or the like.
It should be noted that the neutral position of the additional mass body is positioned so that the drive pulley is engaged with the longitudinal central portion of the linear body or belt-like body, in other words, the additional mass body and the drive pulley are attached to the pair of left and right fixing portions. It is preferable to arrange them symmetrically.

Since the vibration damping device according to the first aspect has a structure in which the driving pulley and the driving means are provided integrally with the additional mass body and both ends of the linear body or the belt-like body are fixed to the vibration-damping body, the structure is simple. Yes, assembly and maintenance can be easily performed.
In addition, both ends of the linear body or strip are fixed directly to the vibration-damped body, and the linear body or strip does not move in the displacement direction of the additional mass body and is provided on the additional mass body. Since the drive pulley is engaged with the linear body or belt-like body, the additional mass body can be immediately displaced by rotating the drive pulley, and the vibration control function with extremely high controllability and responsiveness can be achieved. Can be achieved.

The vibration damping device according to claim 2 is wound around at least one fixed pulley provided on the side of the vibration-damped body and at least one moving pulley provided on the side of the additional mass body. After that, the tip is fixed to the vibration controlled body or the additional mass body.
Thereby, according to the number of the fixed pulley and dynamic pulley to combine, the length of the linear body or strip | belt-shaped body which a drive pulley sends out with respect to the displacement amount of an additional mass body can be set to an integral multiple.
Therefore, since it becomes possible to perform positioning control of the additional mass body with several times higher accuracy while using the driving means having conventional control accuracy, it is possible to finely control the displacement amount of the additional mass body to Even minute vibrations of structures and the like can be reliably suppressed.
In addition, since the force required to displace the additional mass body can be reduced to a fraction, it is possible to displace a larger additional mass body using the same drive means and drive pulley. . In other words, when the masses of the additional mass bodies are the same, the capacity of the driving means can be reduced to a fraction.
Furthermore, since the driving pulley and the driving means are provided integrally with the additional mass body, the structure is simple, and assembly and maintenance can be easily performed.

More specifically, the vibration damping device according to claim 3 is provided with one fixed pulley provided on the side of the vibration-damped body and one moving pulley provided on the side of the additional mass body. Since the tip is fixed to the vibration-damped body after being wound around each, the length of the linear body or belt-shaped body that the drive pulley must send out to displace the additional mass body by 10 centimeters, for example Is 30 centimeters.
As a result, it becomes possible to perform positioning control of the additional mass body with three times higher accuracy while using the drive means having the conventional control accuracy, so that the building can be controlled by finely controlling the displacement amount of the additional mass body. And even minute vibrations of structures and the like can be reliably suppressed.
Further, the force required to displace the additional mass body can be reduced to one third.

Similarly, in the vibration damping device according to the fourth aspect, each end of the linear body or the belt-like body is wound around two fixed pulleys provided on the vibration-damped body side and one moving pulley provided on the additional mass body side. After that, since the tip is fixed to the additional mass body, for example, the length of the linear body or the belt-like body that the drive pulley has to send out to displace the additional mass body by 10 centimeters is 40 centimeters. Become.
This makes it possible to control the positioning of the additional mass body with four times higher accuracy while using the drive means having the conventional control accuracy, so that the building can be controlled by finely controlling the displacement amount of the additional mass body. And even minute vibrations of structures and the like can be reliably suppressed.
Further, the force required to displace the additional mass body can be reduced to a quarter.

  Hereinafter, with reference to FIG. 1 thru | or FIG. 3, each embodiment of the damping device which concerns on this invention is described in detail. In the following description, the same parts are denoted by the same reference numerals, and redundant description is omitted.

First Embodiment First, a vibration damping device according to a first embodiment will be described in detail with reference to FIG.

The vibration damping device 100 according to the first embodiment is a device that dampens vibration generated in the vibration-damped body 10 such as a building or a structure by displacing the additional mass body 20.
The additional mass body 20 is placed on a horizontally extending upper surface 11 on the vibration-damped body 10 via a pair of left and right rollers (support means) 12 and 12 extending in the front-rear direction (direction perpendicular to the paper surface shown in the figure). Thus, it can be freely displaced in the left-right direction with respect to the vibration controlled body 10.
A pair of left and right fixed columns (fixed portions) 13 </ b> L and 13 </ b> R extending in the up-down direction while facing the left-right direction are suspended from the upper surface 11 of the vibration-damped body 10.
A wire rope (linear body) 15 extending in the left-right direction is stretched between the upper ends of the fixed columns 13L and 13R.
In addition, it is preferable to interpose a tension adjusting mechanism for tensioning the wire rope 15 between both ends of the wire rope 15 and the pair of left and right fixing columns 13L and 13R.

A drive mechanism (drive means) 30 is integrally provided on the upper surface 21 of the additional mass body 20. The drive mechanism 30 includes a drive shaft 31 that extends horizontally in the front-rear direction perpendicular to the left-right direction in which the wire rope 15 extends, a servo motor (not shown) that drives the drive shaft 31 to rotate in both forward and reverse rotation directions, A drive pulley 32 is coaxially fixed to the tip of the drive shaft 31.
The additional mass body 20 is positioned so that the drive pulley 32 engages with the longitudinal center of the wire rope 15 at the neutral position, in other words, the additional mass body 20 and the drive pulley 32 at the neutral position of the additional mass body 20. On the other hand, the pair of left and right fixed columns 13L and 13R are arranged so as to be symmetrical.

A control device (not shown) that detects the occurrence of vibration in the vibration-damped body 10 by a sensor (not shown) operates the servo motor of the drive mechanism 30 to rotate the drive pulley 32 to add mass. The body 20 is displaced to suppress the vibration generated in the controlled body 10.
At this time, since the vibration damping device 100 of the first embodiment has a structure in which both ends of the wire rope 15 are directly fixed to the vibration-damped body 10, the wire rope 15 does not move in the left-right direction and the additional mass is increased. Since the drive pulley 32 of the drive mechanism 30 provided integrally with the body 20 is engaged with the wire rope 15, the additional mass body 20 can be immediately displaced in the left-right direction by rotating the drive pulley 32. .
Further, since the wire rope 15 is arranged symmetrically with respect to the drive pulley 32 at the neutral position of the additional mass body 20, when a tension acts on the wire rope 15, the left end side and the right end side of the wire rope 15 There is no difference in elongation between the two.
Therefore, according to the vibration damping device 100 of the first embodiment, it is possible to achieve an accurate vibration damping function with extremely high responsiveness.
Furthermore, since the additional mass body 20 has a simple structure in which the drive mechanism 30 is integrally provided, if both ends of the wire rope 15 are fixed to the fixed columns 13L and 13R of the vibration-damped body 10, the vibration-damped body 10 is fixed. Assembling is completed, and not only the assembly work of the entire apparatus but also the work of assembling the vibration-damped body and the maintenance work can be performed very easily.

Second Embodiment Next, a vibration damping device 200 according to a second embodiment will be described in detail with reference to FIG.

The vibration damping device 200 of the second embodiment is a device that dampens vibration generated in the vibration-damped body 10 such as a building or a structure by displacing the additional mass body 20.
The additional mass body 20 is placed on a horizontally extending upper surface 11 on the vibration-damped body 10 via a pair of left and right rollers (support means) 12 and 12 extending in the front-rear direction (direction perpendicular to the paper surface shown in the figure). Thus, it can be freely displaced in the left-right direction with respect to the vibration controlled body 10.
A pair of left and right fixed columns (fixed portions) 13 </ b> L and 13 </ b> R extending in the up-down direction while facing the left-right direction are suspended from the upper surface 11 of the vibration-damped body 10.
A pair of left and right fixed pulleys 41 and 42 are rotatably supported on the upper ends of the pair of left and right fixed columns 13L and 13R.
Further, on the left and right side surfaces of the additional mass body 20, a pair of left and right movable pulleys 43, 44 are rotatably supported so as to face the pair of left and right constant pulleys 41, 42, respectively.

Between the pair of left and right fixed columns 13L, 13R, a wire rope (linear body) 15 extending in the left-right direction is installed.
The wire rope 15 has its left end connected to and fixed to the lower locking portion 16L of the left fixed column 13L, and is added to the additional mass body after being wound around the left movable pulley 43 and the left fixed pulley 41. 20 extends to the right side along the upper surface of 20 and is wound around a drive pulley 32.
The wire rope 15 extending to the right side from the drive pulley 32 is wound around the right fixed pulley 42 and the right movable pulley 44, and then connected to the lower locking portion 16R of the right fixing column 13R and fixed. Has been.
The additional mass body 20 is positioned so that the drive pulley 32 engages with the longitudinal center of the wire rope 15 at the neutral position, in other words, the additional mass body 20 and the drive pulley 32 at the neutral position of the additional mass body 20. On the other hand, the pair of left and right fixed columns 13L and 13R are arranged so as to be symmetrical.
Furthermore, it is preferable that a tension adjusting mechanism for tensioning the wire rope 15 is interposed between both ends of the wire rope 15 and the pair of left and right engaging portions 16L and 16R.

A control device (not shown) that detects the occurrence of vibration in the vibration-damped body 10 by a sensor (not shown) operates the servo motor of the drive mechanism 30 to rotate the drive pulley 32 to add mass. The body 20 is displaced to suppress the vibration generated in the controlled body 10.
At this time, in the vibration damping device 200 of the second embodiment, the left and right ends of the wire rope 15 are provided on the pair of left and right fixed columns 13L and 13R, respectively, and the fixed pulleys 41 and 42 and the left and right of the additional mass body 20 are provided. Since the tip is fixed to a pair of left and right fixed columns 13L and 13R after being wound around one movable pulley 43 and 44 respectively provided on the side surfaces of, for example, the additional mass body 20 is 10 cm to the right The length of the wire rope 15 that the drive pulley 32 has to send out in order to displace it is 30 centimeters.
This makes it possible to control the positioning of the additional mass body 20 with three times higher accuracy while using the drive mechanism 30 having the conventional control accuracy, so that the displacement amount of the additional mass body 20 can be finely controlled. Thus, even minute vibrations of the vibration-damped body 10 can be reliably suppressed.
Further, since the force required to displace the additional mass body 20 can be reduced to one third, the additional mass body having a larger mass is displaced while using the same drive mechanism 30 and drive pulley 32. It is also possible.

Third Embodiment Next, a vibration damping device 300 according to a third embodiment will be described in detail with reference to FIG.

The vibration damping device 300 of the third embodiment is a device that dampens vibration generated in the vibration-damped body 10 such as a building or a structure by displacing the additional mass body 20.
The additional mass body 20 is placed on a horizontally extending upper surface 11 on the vibration-damped body 10 via a pair of left and right rollers (support means) 12 and 12 extending in the front-rear direction (direction perpendicular to the paper surface shown in the figure). Thus, it can be freely displaced in the left-right direction with respect to the vibration controlled body 10.
A pair of left and right fixed columns (fixed portions) 13 </ b> L and 13 </ b> R extending in the up-down direction while facing the left-right direction are suspended from the upper surface 11 of the vibration-damped body 10.
And two pairs of left and right fixed pulleys 51, 52, 53, 54 are rotatably supported on the upper and lower portions of the pair of left and right fixed columns 13L, 13R.
Further, on the left and right side surfaces of the additional mass body 20, a pair of left and right movable pulleys 55 and 56 are rotatably supported so as to face two left and right pairs of fixed pulleys 51, 52, 53, and 54, respectively. .

Between the pair of left and right fixed columns 13L, 13R, a wire rope (linear body) 15 extending in the left-right direction is installed.
The wire rope 15 has a left end connected to and fixed to the left side locking portion 17L of the additional mass body 20, and is wound around the left fixed pulley 53, the left movable pulley 55, and the left fixed pulley 51. After being rotated, it extends to the right along the upper surface of the additional mass body 20 and is wound around the drive pulley 32.
The wire rope 15 extending to the right from the drive pulley 32 is wound around the right fixed pulley 52, the right movable pulley 56, and the right fixed pulley 54, and then the tip of the wire rope 15 extends from the right side of the additional mass body. It is connected and fixed to the locking portion 17R.
The additional mass body 20 is positioned so that the drive pulley 32 engages with the longitudinal center of the wire rope 15 at the neutral position, in other words, the additional mass body 20 and the drive pulley 32 at the neutral position of the additional mass body 20. On the other hand, the pair of left and right fixed columns 13L and 13R are arranged so as to be symmetrical.
Further, it is preferable that a tension adjusting mechanism for tensioning the wire rope 15 is interposed between both ends of the wire rope 15 and the pair of left and right engaging portions 17L and 17R.

A control device (not shown) that detects the occurrence of vibration in the vibration-damped body 10 by a sensor (not shown) operates the servo motor of the drive mechanism 30 to rotate the drive pulley 32 to add mass. The body 20 is displaced to suppress the vibration generated in the controlled body 10.
At this time, the vibration damping device 300 according to the fourth embodiment includes two pairs of constant pulleys 51, 52, 53, and 54 in which the left and right ends of the wire rope 15 are provided on the pair of left and right fixed columns 13L and 13R, respectively. After winding around a pair of movable pulleys 55 and 56 respectively provided on the left and right side surfaces of the mass body 20, the tip is fixed to the left and right side surfaces of the additional mass body 20, respectively. The length of the wire rope 15 that the drive pulley 32 has to send out to be displaced to the right by 10 centimeters is 40 centimeters.
This makes it possible to control the positioning of the additional mass body 20 with four times higher accuracy while using the drive mechanism 30 having the conventional control accuracy, so that the displacement amount of the additional mass body 20 can be finely controlled. Thus, even minute vibrations of the vibration-damped body 10 can be reliably suppressed.
Further, since the force required to displace the additional mass body 20 can be reduced by a factor of 4, the additional mass body having a larger mass can be displaced while using the same drive mechanism 30 and drive pulley 32. It is also possible.

As mentioned above, although each embodiment of the damping device concerning the present invention was described in detail, it cannot be overemphasized that the present invention is not limited by the above-mentioned embodiment and can be further developed.
For example, more constant pulleys and moving pulleys can be used in combination.
Further, instead of the wire rope 15 as an example of the linear body used in each of the above-described embodiments, a cable or a chain can be used. As examples of the belt-like body, a flat belt, a V belt, a timing belt (tooth) (Attached belt) etc. can also be used.

The side view which shows typically the damping device of 1st Embodiment by this invention. The side view which shows typically the damping device of 2nd Embodiment by this invention. The side view which shows typically the damping device of 3rd Embodiment by this invention. The side view which shows typically the damping device of Unexamined-Japanese-Patent No. 5-59843. The side view which shows typically the damping device of Unexamined-Japanese-Patent No. 5-59843.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Structure 2 Roller 3 Additional mass body 4,5 Winding drum 6,7 Wire rope 8 Winding drum 9 Press drum 10 Damped body 11 Upper surface 12 Roller (support means)
13 Fixed column (fixed part)
15 Wire rope
20 Additional mass body 30 Drive mechanism (drive means)
31 Drive shaft 32 Drive pulleys 41, 42 Fixed pulleys 43, 44 Dynamic pulleys 51, 52, 53, 54 Fixed pulleys 55, 56 Dynamic pulley 100 Damping device 200 of the first embodiment Damping device 300 of the second embodiment Vibration damping device of 3 embodiment

Claims (4)

An apparatus for damping vibration generated in a controlled body by displacing an additional mass body,
Support means for supporting the additional mass body so as to be displaceable in the horizontal direction on the vibration-damped body;
A linear body or a belt-like body stretched between a pair of fixed portions provided on the vibration-damped body,
A driving pulley that is supported on the additional mass body so as to be rotatable about an axis extending in a direction perpendicular to a direction in which the linear body or the belt-like body extends, and that engages with the linear body or the belt-like body in the rotational direction. When,
Driving means mounted on the additional mass body for driving the drive pulley to rotate in both forward and reverse rotation directions;
A vibration damping device comprising: An apparatus for damping vibration generated in a controlled body by displacing an additional mass body,
Support means for supporting the additional mass body so as to be displaceable in the horizontal direction on the vibration-damped body;
A linear body or a belt-like body constructed between a pair of fixed portions provided on the vibration-damped body;
A driving pulley that is supported on the additional mass body so as to be rotatable about an axis extending in a direction perpendicular to a direction in which the linear body or the belt-like body extends, and that engages with the linear body or the belt-like body in the rotational direction. When,
Driving means mounted on the additional mass body for driving the drive pulley to rotate in both forward and reverse rotation directions;
Fixed pulleys respectively provided at least one each on the pair of fixed parts;
A moving pulley provided at least one on each of the additional mass bodies opposed to the pair of fixed portions;
The linear body or the belt-like body is engaged with the drive pulley at a longitudinal center portion thereof, and both ends thereof are wound around the fixed pulley and the movable pulley, respectively, and then the fixed portion or the A vibration damping device that is fixed to each additional mass body. Each of the fixed pulleys is provided on each of the pair of fixed portions,
Each of the movable pulleys is provided in a portion of the additional mass body that is opposed to the pair of fixed portions, respectively.
The linear body or belt-like body is engaged with the drive pulley at the center in the longitudinal direction, and both ends thereof are fixed to the fixed portion after being wound around the fixed pulley and the movable pulley, respectively. The vibration damping device according to claim 2, wherein: Two of the fixed pulleys are provided on each of the pair of fixing portions,
Each of the movable pulleys is provided in a portion of the additional mass body that is opposed to the pair of fixed portions, respectively.
The linear body or belt-like body is engaged with the drive pulley at the center in the longitudinal direction, and both ends thereof are fixed to the additional mass body after being wound around the fixed pulley and the movable pulley, respectively. The vibration damping device according to claim 2, wherein:

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