Damping switch device of synchronization mass damper

Abstract

To provide a damping switch device of a synchronization mass damper which can quickly curb vertical swinging of the synchronization mass damper when environmental vibration subsides while effectively reducing vertical swinging of a floor caused by the environmental vibration.SOLUTION: A damping switch device 70 damps vibration of a synchronization mass damper 30 installed on a floor 20 of a building or stops damping. The damping switch device 70 includes: a connection unit 50 including a first connection part 53 connected to the synchronization mass damper 30, a second connection part 54 which contacts with a damping material 58, and a connection mechanism 52 which forms a connection attitude or a disconnection attitude between the first connection part 53 and the second connection part 54; and a control unit 60 which stores an acceleration threshold, causes the connection mechanism 52 to operate to form the connection attitude and thereby damp vibration of the synchronization mass damper 30 when measurement data acquired by an accelerometer 40 is lower than an acceleration threshold, and causes the connection mechanism 52 to operate to form the disconnection attitude and prevent damping of vibration of the synchronization mass damper 30 when the measurement data is higher than or equal to the acceleration threshold.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a damping switching device for a tuned mass damper.

Background Art

[0002] On the floor of a building (or structure), there are always minute vibrations caused by the so-called environmental vibrations, such as the minute vibrations of the earth itself, traffic vibrations caused by the running of vehicles including trains, vibrations during the operation of factory equipment, etc., vibrations caused by wind loads, and further vibrations caused by walking indoors. In order to reduce the minute vibrations (acceleration) of the floor at such a constant minute vibration level, a tuned mass damper (TMD: Tuned Mass Damper) may be installed on the floor or beams supporting the floor.

[0003] Generally, the tuned mass damper is designed and set to have appropriate damping and robustness. However, by making the damping amount as close to zero (non-damping) as possible, the sway of the floor can be minimized. For example, when the vibration frequency at the vibration source such as equipment vibration among environmental vibrations is constant, the tuned mass damper set to be close to non-damping in this way is effective.

[0004] However, when the tuned mass damper is set in a state close to non-damping, even if environmental vibrations such as walking vibrations subside, the tuned mass damper will still continue to sway. Conversely, a phenomenon occurs where the tuned mass damper sways the floor, which is not preferable. Therefore, in order to prevent such a phenomenon, ultimately, an appropriate damping amount is set for the tuned mass damper, so that the vibration of the floor cannot be minimized.

[0005] From the above, a tuned mass damper is desired that is equipped with a mechanism capable of effectively reducing the vertical sway of the floor caused by environmental vibrations and quickly converging the vertical sway of the tuned mass damper when the environmental vibrations subside.

[0006] Here, Patent Document 1 proposes a floor vibration control device. In this vibration control device, a weight is installed on a lever that is supported so as to be able to vibrate in the vertical direction, and the lever or the weight is supported by an elastic support member so as to be able to vibrate in the vertical direction. A damper is connected to the other end of the lever, and it is installed on the floor or a vibration system common to the floor. The damper is a viscous body damper, and it is configured such that the damping force can be adjusted by increasing or decreasing the viscous body immersion area of the viscous resistance plate thereof.

Prior Art Documents

Patent Documents

[0007]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0008] According to the floor vibration control device described in Patent Document 1, although the damping force can be adjusted by increasing or decreasing the viscous body immersion area of the viscous resistance plate immersed in the viscous body damper, it does not have a means capable of effectively reducing the vertical sway of the floor caused by environmental vibration while quickly converging the sway of the tuned mass damper when the environmental vibration subsides.

[0009] The present invention has been made in view of the above problems, and an object thereof is to provide a damping switching device for a tuned mass damper that can effectively reduce the vertical sway of the floor caused by environmental vibration and quickly converge the vertical sway of the tuned mass damper when the environmental vibration subsides.

Means for Solving the Problems

[0010] To achieve the above object, one aspect of the damping switching device for a tuned mass damper according to the present invention is A damping switching device that executes vibration attenuation and non-attenuation of a tuned mass damper directly or indirectly installed on the floor of a building. The tuned mass damper includes a gantry, a spring installed on the gantry, and a mass supported by the spring. An accelerometer is installed directly or indirectly on the floor. In the damping switching device of the tuned mass damper, a connecting unit including a first connecting portion connected to the tuned mass damper, a second connecting portion contacting a damping material without being connected to the tuned mass damper, and a connecting mechanism that forms a connected posture and a disconnected posture between the first connecting portion and the second connecting portion; a control unit that stores an acceleration threshold value serving as a standard when operating the connecting mechanism, acquires measurement data from the accelerometer, operates the connecting mechanism when the measurement data is less than the acceleration threshold value, forms the connected posture to attenuate the vibration of the tuned mass damper, and operates the connecting mechanism when the measurement data is greater than or equal to the acceleration threshold value to form the disconnected posture and not attenuate the vibration of the tuned mass damper.

[0011] According to this aspect, a connecting unit including a first connecting portion connected to a tuned mass damper, a second connecting portion contacting a damping material, and a connecting mechanism that forms a connected posture and a disconnected posture between the first connecting portion and the second connecting portion, stores an acceleration threshold value serving as a standard when operating the connecting mechanism, operates the connecting mechanism when the measurement data acquired from the accelerometer is less than the acceleration threshold value, forms the connected posture to attenuate the vibration of the tuned mass damper, operates the connecting mechanism when the measurement data is greater than or equal to the acceleration threshold value, and has a control unit that forms the disconnected posture and does not attenuate the vibration of the tuned mass damper. Based on the measurement data acquired from the accelerometer, when the floor is shaking due to environmental vibration, the up-and-down shaking of the floor can be effectively reduced without attenuating the tuned mass damper, and when the vibration of the floor caused by environmental vibration subsides, the tuned mass damper can be attenuated to quickly converge the shaking of the tuned mass damper.

[0012] Here, for the tuned mass damper controlled by the damping switching device, there are forms in which the mass is supported by a plurality of vertical springs, and a so-called cantilever form in which one end of the mass is rotatably attached to the rotation axis and the other end side of the mass is supported by a vertical spring, etc.

[0013] In addition, the "tuned mass damper directly or indirectly installed on the floor of the building" includes the form in which the tuned mass damper is installed on the floor of the building and the form in which the tuned mass damper is indirectly installed on the floor by being installed on a beam or the like that supports the floor. Further, the "accelerometer is directly or indirectly installed on the floor" includes the form in which the accelerometer is installed on the floor and the form in which the accelerometer is indirectly installed on the floor by being installed on a beam or a tuned mass damper that supports the floor.

[0014] In another aspect of the damping switching device for the tuned mass damper according to the present invention, the connecting mechanism is a rotation driving part that is rotatable about a fulcrum provided on the mass and presses a part of the first connecting part to rotate the first connecting part, and is characterized by including an electromagnet or a permanent magnet that is provided on one of the first connecting part and the second connecting part and magnetically adsorbs to the other.

[0015] According to this aspect, the connecting mechanism includes a rotation driving part that presses a part of the first connecting part that is rotatable about a fulcrum provided on the mass of the tuned mass damper to rotate the first connecting part, and an electromagnet or a permanent magnet that is provided on one of the first connecting part and the second connecting part and magnetically adsorbs to the other, so that the connecting posture and the connection release posture of the first connecting part and the second connecting part can be switched smoothly and reliably. Among them, when an electromagnet is applied, it is preferable that the generation and release of the magnetic force of the electromagnet are switched at any time, so that the connecting posture and the connection release posture of the first connecting part and the second connecting part can be switched more smoothly.

[0016] In another aspect of the damping switching device for the tuned mass damper according to the present invention, The connecting mechanism is characterized in that it is an electromagnet that is attached to the mass and magnetically attracts one of the first connecting part and the second connecting part to the other.

[0017] According to this aspect, since the connecting mechanism is an electromagnet that is provided on one of the first connecting part and the second connecting part attached to the mass of the tuned mass damper and magnetically attracts the other, for example, while moving the first connecting part in the vertical direction, the connecting posture and the disconnected posture between the first connecting part and the second connecting part can be switched smoothly and reliably.

[0018] Another aspect of the damping switching device for a tuned mass damper according to the present invention is characterized in that a container for accommodating the damping material is installed on the gantry, and a part of the second connecting part is accommodated in the container in a posture of contacting the damping material.

[0019] According to this aspect, since the damping material is accommodated in the container installed on the gantry and a part of the second connecting part is accommodated in the container in a posture of contacting the damping material, the tuned mass damper that sways in the vertical direction can be effectively damped by the damping material via the first connecting part and the second connecting part in the connecting posture.

[0020] Another aspect of the damping switching device for a tuned mass damper according to the present invention is characterized in that a flange that extends in the lateral direction is provided in a region of the second connecting part that contacts the damping material.

[0021] According to this aspect, the flange that extends in the lateral direction and sways in the vertical direction in synchronization with the tuned mass damper that sways in the vertical direction receives a large resistance from the damping material, thereby achieving a high damping effect.

[0022] Another aspect of the damping switching device for a tuned mass damper according to the present invention is characterized in that the front gantry is installed directly or indirectly on a beam that supports the floor.

[0023] According to this aspect, by installing the base constituting the damping switching device directly or indirectly on the beam that supports the floor, while effectively using the underfloor space as the installation space for the tuned mass damper and the damping switching device, it is possible to effectively reduce the sway of the floor caused by environmental vibrations. Here, "the base is installed directly or indirectly on the beam that supports the floor" includes both the form in which the base is installed directly on the beam and the form in which an installation base or the like is installed on the beam, and the base constituting the damping switching device is installed on the installation base or the like, so that the base is installed indirectly on the beam.

[0024] Also, another aspect of the damping switching device of the tuned mass damper according to the present invention is characterized in that the base is installed on the floor slab of a double floor.

[0025] According to this aspect, by installing the second base on the floor slab of the double floor, while effectively using the underfloor space of the double floor such as a free access floor as the installation space for the tuned mass damper and the damping switching device, it is possible to effectively reduce the sway of the floor caused by environmental vibrations.

Effect of the Invention

[0026] As can be understood from the above description, according to the damping switching device of the tuned mass damper of the present invention, while effectively reducing the vertical sway of the floor caused by environmental vibrations, when the environmental vibrations subside, the vertical sway of the tuned mass damper can be quickly converged.

Brief Description of the Drawings

[0027]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Mode for Carrying Out the Invention

[0028] Hereinafter, a damping switching device for a tuned mass damper according to an embodiment will be described with reference to the accompanying drawings. In the present specification and drawings, substantially the same components may be denoted by the same reference numerals, and redundant descriptions may be omitted.

[0029] [Damping Switching Device for Tuned Mass Damper According to Embodiment] With reference to FIGS. 1 to 7, an example of a damping switching device for a tuned mass damper according to an embodiment will be described. Here, FIG. 1 is an overall configuration diagram showing a damping switching device according to an embodiment and a state where a tuned mass damper whose vibration is controlled by the damping switching device is installed on a beam supporting a floor. Further, FIG. 2 is an enlarged view of part II of FIG. 1, showing an example of a damping switching device according to an embodiment in a state where the damping of the tuned mass damper is not reduced, and FIG. 3 is an enlarged view of part II of FIG. 1, showing an example of a damping switching device according to an embodiment in a state where the damping of the tuned mass damper is reduced.

[0030] The object whose vibration is reduced by the tuned mass damper 30 shown in Fig. 1 is the floor 20 that forms the building. The floor 20 in the illustrated example is, for example, a concrete floor slab with a span of about 15 m between a pair of large beams 15. There are a plurality of small beams 10 that similarly support the floor 20 between the pair of large beams 15.

[0031] Both the large beam 15 and the small beam 10 are formed of H-shaped steel (including I-shaped steel) with different dimensions. An installation base 18 is bridged over the lower flanges 11 of the two small beams 10 with a lower beam formation compared to the large beam 15, and a base 38 that forms the tuned mass damper 30 is installed on the installation base 18. Therefore, the tuned mass damper 30 in the illustrated example is installed indirectly with respect to the floor 20 via the small beam 10.

[0032] In this way, since the tuned mass damper 30 and the damping switching device 70 (the connecting unit 50 thereof) that reduces the vibration of the tuned mass damper 30 are installed between the two small beams 10 that support the floor 20 below the floor 20, the underfloor space can be effectively used as the installation space for the tuned mass damper 30 and the connecting unit 50. Although not shown in the figure, in addition to the illustrated example, there is also a form in which the underfloor space of a double floor such as a free access floor is effectively used as the installation space for the tuned mass damper and the damping switching device.

[0033] The tuned mass damper 30 includes a base 38, a plurality of springs 38 installed on the base 38, and a mass 31 supported by the springs 38. Also, in the illustrated example, an accelerometer 40 that measures the vibration of the floor 20 and the small beam 10 that vibrates in the X1 direction, which is the vertical direction, in synchronization is installed on the installation base 18 where the base 38 is installed.

[0034] Here, the tuned mass damper 30 in the illustrated example is a form in which a plurality of springs 38 are arranged evenly in a plane with respect to the lower surface of the mass 31 to support the mass 31. In the illustrated example, the mass 31 is supported by two springs 38 on the left and right. As another form, a so-called cantilever type tuned mass damper (not shown) in which one end of the mass is rotatably attached to the base and the other end of the mass or the vicinity thereof is supported by a spring may also be used.

[0035] In the bed 20, there are constant minute vibrations caused by so-called environmental vibrations such as traffic vibrations caused by the running of vehicles including railways, vibrations during the operation of factory equipment and the like (equipment vibrations), and walking vibrations caused by walking indoors. In order to reduce the constant minute vibration level (acceleration) of such a bed, a tuned mass damper 30 is installed, and the acceleration of this minute vibration level is constantly measured by an accelerometer 40.

[0036] The damping switching device 70 that executes the vibration attenuation and non-attenuation of the tuned mass damper 30 has a connection unit 50 and a control unit 60.

[0037] The connection unit 50 is mounted on the gantry 38, and a part of it is attached to the mass 31. Its specific configuration will be described in detail below.

[0038] On the other hand, the control unit 60 is formed by a computer and is installed at a location different from the bed 20 and the beams 10, 15. For example, an installation gantry may be attached to the beams 10, 15 in the same way as the tuned mass damper 30, and the control unit 60 may be mounted on the installation gantry.

[0039] The measurement data measured by the accelerometer 40 is transmitted to the control unit 60 in the Y1 direction by wireless communication. The control unit 60 that has acquired the measurement data transmits an operation signal to the connection unit 50 in the Y2 direction to operate the components of the connection unit 50, and executes the vibration attenuation and non-attenuation of the tuned mass damper 30.

[0040] As shown in FIG. 2, the connection unit 50 has a first connection part 53 that is rotatably connected to the mass 31 of the tuned mass damper 30, and a second connection part 54 that is in partial contact with a damping material 58 housed inside the container 57 without being connected to the tuned mass damper 30. The connection unit 50 further has a connection mechanism 52 formed by a rotation drive part 51 connected to a part of the first connection part 53 via a connecting spring 51b, and an electromagnet 56 attached to a part of the first connection part 53. Here, silicone oil, various greases, etc. can be applied to the damping material 58.

[0041] The mass 31 is provided with a receiving groove 34 penetrating through its upper surface 32 and lower surface 33, and a rotating shaft 37 that horizontally crosses is provided at an intermediate position of the receiving groove 34, and a first connecting portion 53 is attached to the rotating shaft 37.

[0042] The rotation driving unit 51 is formed by a cylinder mechanism, is fixed to the upper surface 32 of the mass 31, a connecting spring 51b is attached to an end portion of a piston rod 51a forming the cylinder mechanism, and the connecting spring 51b is connected to a part of the first connecting portion 53 (the upper intermediate position in the illustrated example).

[0043] Both the first connecting portion 53 and the second connecting portion 54 are, for example, members made of iron, and at least the second connecting portion 54 is a magnetic body and is magnetically adsorbed to an electromagnet 56 in a state having a magnetic force.

[0044] By driving the cylinder mechanism 51 to slide the piston rod 51a in the horizontal X3 direction, the first connecting portion 53 rotates in the X4 direction around the rotating shaft 37. An electromagnet 56 is attached to an end portion of the first connecting portion 53 on the side of the second connecting portion 54, and due to the rotation of the first connecting portion 53 in the X4 direction, the electromagnet 56 is movable in the X5 direction in a direction approaching and away from the second connecting portion 54.

[0045] For example, when the electromagnet 56 approaches the second connecting portion 54, a current is applied to a coil forming the electromagnet 56 to generate a magnetic force, and the electromagnet 56 in a state having a magnetic force is magnetically adsorbed to the second connecting portion 54, and a connecting posture of the first connecting portion 53 and the second connecting portion 54 is formed.

[0046] On the other hand, when releasing the connecting posture of the first connecting portion 53 and the second connecting portion 54 to form a released connecting posture, the application of current to the electromagnet 56 is stopped, and the magnetic force disappears, so that the released connecting posture is smoothly formed.

[0047] In this way, the operation of the cylinder mechanism 51 and the coordinated operation of the electromagnet 56 are controlled by the control unit 60.

[0048] Here, instead of the electromagnet 56, a permanent magnet may be applied. However, since the permanent magnet does not lose its magnetic force, it is inferior to the electromagnet 56 in terms of the smoothness of the posture change from the connected posture to the disconnected posture of the first connecting portion 53 and the second connecting portion 54. Therefore, the application of the electromagnet 56 is preferable. Note that the connecting mechanism 52 in the illustrated example is composed of the cylinder mechanism 51 and the electromagnet 56. However, the connecting mechanism may be other mechanical connecting mechanisms (not shown) using an air gripper, a gear, or the like.

[0049] In the disconnected posture of the first connecting portion 53 and the second connecting portion 54 shown in FIG. 2, when the floor 20 (see FIG. 1) shakes due to environmental vibration and the mass 31 shakes in the vertical X2 direction to attenuate the shake of the floor 20, the vibration of the mass 31 is not attenuated by the damping material 58. Therefore, it becomes possible to effectively reduce the vertical shake of the floor 20 with the tuned mass damper 30.

[0050] On the other hand, when the vertical vibration of the floor 20 caused by environmental vibration subsides, as shown in FIG. 3, the cylinder mechanism 51 is operated to extend the piston rod 51a in the X3' direction, rotate the first connecting portion 53 in the X4' direction, and magnetically adsorb the electromagnet 56 having magnetic force to a part of the second connecting portion 54 in the X5' direction to form the connected posture of the first connecting portion 53 and the second connecting portion 54.

[0051] When the first connecting portion 53 fixed to the mass 31 is connected to the second connecting portion 54, when the mass 31 vibrates in the vertical X2 direction, the vertical vibration in the X6 direction of the second connecting portion 54, a part of which is accommodated inside the damping material 58, is attenuated by the damping material 58.

[0052] Here, a flange 55 that extends horizontally is provided at the lower end of the second connecting portion 54 (an example of the region in contact with the damping material 58).

[0053] Inside the damping material 58, the flange 55 vibrates vertically together with the second connecting portion 54. When moving downward, an upward pushing distributed load p2 from the damping material 58 acts on the lower surface of the flange 55. When moving upward, a downward pushing distributed load p1 from the damping material 58 acts on the upper surface of the flange 55. Therefore, the viscous resistance by the damping material 58 is increased via the flange 55, and the vertical vibration of the second connecting portion 54 is quickly damped.

[0054] The quick damping of the vibration of the second connecting portion 54 leads to the quick damping of the vertical vibration of the mass 31 connected to the second connecting portion 54 via the first connecting portion 53 and the cylinder mechanism 51.

[0055] Next, with reference to FIGS. 4 and 5, an example of the hardware configuration and functional configuration of the control unit 60 that forms the damping switching device 70 will be described.

[0056] The control unit 60 is constituted by an information processing device (computer) such as a personal computer (PC: Personal Computer). The computers that constitute the control unit 60 include a CPU (Central Processing Unit) 61, a main storage device 62, an auxiliary storage device 63, a communication IF (interface) 64, and an input / output IF 65 that are mutually connected by a connection bus 66. The main storage device 62 and the auxiliary storage device 63 are recording media readable by the computer. Note that the above-described components may be provided individually, or some of the components may not be provided.

[0057] The CPU 61 is also called an MPU (Microprocessor) or a processor. The CPU 61 may be a single processor or a multi-processor. The CPU 61 is a central arithmetic processing unit that controls the entire control unit 60 composed of a computer. The CPU 61, for example, expands a program stored in the auxiliary storage device 63 so that it can be executed in the work area of the main storage device 62, and provides a function that meets a predetermined purpose by controlling peripheral devices through the execution of the program.

[0058] The main memory device 62 stores the computer programs executed by the CPU 61, the data processed by the CPU 61, and the like. The main memory device 62 includes, for example, a flash memory, a RAM (Random Access Memory), and a ROM (Read Only Memory). The auxiliary storage device 63 reads and writes various programs and various data to a recording medium, and is also called an external storage device. The auxiliary storage device 63 stores, for example, an OS (Operating System), various programs, various tables, and the like. The OS includes, for example, a communication interface program for transferring data to and from external devices connected via the communication IF 64. External devices such as those connected to the control unit 60 include communication means provided in the accelerometer 40, the cylinder mechanism 51, the electromagnet 56, and the like.

[0059] The auxiliary storage device 63 is used, for example, as a storage area to assist the main memory device 62, and stores the computer programs executed by the CPU 61, the data processed by the CPU 61, and the like. The auxiliary storage device 63 is a silicon disk including a non-volatile semiconductor memory (flash memory, EPROM (Erasable Programmable ROM)), a hard disk drive (HDD) device, a solid state drive device, or the like. Further, as the auxiliary storage device 63, a drive device for a removable recording medium such as a CD drive device, a DVD drive device, or a BD drive device is exemplified, and as the removable recording medium, a CD, a DVD, a BD, a USB (Universal Serial Bus) memory, an SD (Secure Digital) memory card, or the like is exemplified.

[0060] The input / output IF 65 is an interface for inputting and outputting data between the control unit 60 and devices connected thereto. Input devices such as a keyboard, a pointing device such as a touch panel or a mouse, and a microphone are connected to the input / output IF 65, for example. The control unit 60 receives operation instructions and the like from an operator who operates the input device via the input / output IF 65.

[0061] In addition, devices such as display devices such as liquid crystal panels (LCD: Liquid Crystal Display) and organic EL panels (EL: Electroluminescence), and output devices such as printers and speakers are connected to the input / output IF65. In the control unit 60, measurement data transmitted from the accelerometer 40, acceleration thresholds serving as references when operating the coupling mechanism 52, and the like are displayed on the screen.

[0062] The communication IF64 is an interface between the control unit 60 and the network to which it is connected. The communication IF64 receives measurement data from the accelerometer 40 and transmits command signals to the electromagnet 56 and the cylinder mechanism 51 via various networks including public networks such as the Internet.

[0063] As shown in FIG. 5, the control unit 60 provides various functions of at least the acquisition unit 102, the calculation unit 104, the operation unit 106, the display unit 108, and the storage unit 110 by executing a program by the CPU 61. Here, at least a part of the above processing functions may be provided by a DSP (Digital Signal Processor), a GPU (Graphics Processing Unit), etc. Similarly, at least a part of the above processing functions may be a dedicated LSI (large scale integration) such as an FPGA (Field-Programmable Gate Array), a numerical calculation processor, an image processing processor, or other digital circuits.

[0064] The acquisition unit 102 acquires, at any time, measurement data transmitted from the accelerometer 40 that constantly measures minute vibrations of the floor 20, and stores (stores) it in the storage unit 110 each time.

[0065] The storage unit 110 stores an acceleration threshold value that serves as a reference when operating the cylinder mechanism 51. This acceleration threshold value is, for example, a value that quantitatively defines the boundary between a state in which a person on the floor 20 feels vibration uncomfortably and a state in which they do not feel uncomfortable, and may be set to various numerical values.

[0066] The calculation unit 104 determines the magnitude relationship between the measurement data and the acceleration threshold value, and when the measurement data is equal to or greater than the acceleration threshold value, it sends a signal to that effect to the operation unit 106.

[0067] Here, when the measurement data is equal to or greater than the acceleration threshold value, since it is necessary to attenuate the vibration of the floor 20, the vibration of the mass 31 of the tuned mass damper 30 that vibrates to attenuate the vibration of the floor 20 is not attenuated.

[0068] In order not to attenuate the vibration of the mass 31, the operation unit 106 sends a command signal not to apply a current to the electromagnet 56 and not to generate a magnetic force, and further sends a command signal to retract the piston rod 51a so as to separate the first connecting portion 53 from the second connecting portion 54 with respect to the cylinder mechanism 51, and forms a disconnected posture of the first connecting portion 53 and the second connecting portion 54 as shown in FIG. 2.

[0069] Since the first connecting portion 53 and the second connecting portion 54 are not connected, the attenuation of the vibration of the mass 31 by the damping material 58 is eliminated, and the vibration of the floor 20 can be attenuated by the vibration of the mass 31.

[0070] On the other hand, when the measurement data is less than the acceleration threshold value, a signal to that effect is sent to the operation unit 106.

[0071] Here, when the measurement data is less than the acceleration threshold value, since the vibration of the floor 20 has converged, it is necessary to attenuate the vibration of the mass 31 of the tuned mass damper 30 that vibrates to attenuate the vibration of the floor 20. This is to eliminate a situation where the vibration of the floor 20 does not converge due to the continuous vibration of the mass 31 despite the fact that the vibration of the floor 20 has converged.

[0072] In order to attenuate the vibration of the mass 31, the operation unit 106 transmits a command signal for applying a current to the electromagnet 56 to generate a magnetic force, and further transmits a command signal for extending the piston rod 51a so as to push the first connecting portion 53 into the cylinder mechanism 51, and forms a connecting posture between the first connecting portion 53 and the second connecting portion 54 via the electromagnet 56.

[0073] When the connecting posture between the first connecting portion 53 and the second connecting portion 54 is formed, as shown in FIG. 3, the vibration of the second connecting portion 54 is attenuated by the damping material 58, and in conjunction with this, the vibration of the mass 31 is attenuated.

[0074] The display unit 108 displays the measurement data from the accelerometer 40 that changes moment by moment, and displays, for example, that the vibration of the floor 20 is less than the acceleration threshold value, or that the vibration is being attenuated by the tuned mass damper 30 when the acceleration is equal to or greater than the acceleration threshold value.

[0075] In this way, a connecting unit 50 including a first connecting portion 53 connected to the tuned mass damper 30, a second connecting portion 54 in contact with the damping material 58, and a connecting mechanism 52 that forms a connecting posture and a connecting release posture between the first connecting portion 53 and the second connecting portion 54, stores an acceleration threshold value that serves as a guideline when operating the connecting mechanism 52, operates the connecting mechanism 52 when the measurement data acquired from the accelerometer 40 is less than the acceleration threshold value, forms a connecting posture to attenuate the vibration of the tuned mass damper 30, and operates the connecting mechanism 52 when the measurement data is equal to or greater than the acceleration threshold value, and forms a connecting release posture to not attenuate the vibration of the tuned mass damper 30. By having the control unit 60, when the floor 20 is swaying due to environmental vibration based on the measurement data acquired from the accelerometer 40, the vertical sway of the floor 20 can be effectively reduced without attenuating the tuned mass damper 30, and when the vibration of the floor 20 caused by the environmental vibration subsides, the tuned mass damper 30 can be attenuated to quickly converge the sway of the tuned mass damper 30.

[0076] Next, with reference to FIGS. 6 and 7, another example of the damping switching device according to the embodiment will be described. Here, FIG. 6 is a diagram showing a state in which another example of the damping switching device according to the embodiment does not reduce the damping of the tuned mass damper, and FIG. 7 is a diagram showing a state in which another example of the damping switching device according to the embodiment reduces the damping of the tuned mass damper.

[0077] In the damping switching device of the illustrated example, in the connecting unit 50A which is a component thereof, a cylinder mechanism 51A is incorporated in the mass 31, the piston rod 51c of the cylinder mechanism 51A is the first connecting portion, an electromagnet 56 is attached to the end of the piston rod 51c, and by the slide of the piston rod 51c in the X7 direction which is the vertical direction, the connection posture of the first connecting portion 51c and the second connecting portion 54 shown in FIG. 7 and the connection release posture shown in FIG. 6 are formed, which is different from the damping switching device 70 having the connecting unit 50.

[0078] The damping switching device provided with the connecting unit 50A also exhibits the same effects as the damping switching device 70 having the connecting unit 50.

[0079] In addition, other embodiments in which other components are combined with the configurations etc. described in the above embodiment may be possible, and the present invention is not limited to the configurations shown here at all. In this regard, it can be changed without departing from the gist of the present invention, and can be appropriately determined according to the application form.

Explanation of Reference Numerals

[0080] 10: Beam (small beam) 11: Lower flange 15: Beam (large beam) 18: Installation base 20: Floor (concrete floor slab) 30: Tuned mass damper 31: Mass 32: Upper surface 33: Lower surface 34: Accommodation groove 35: Spring 37: Rotation shaft 38: Stand 40: Accelerometer 50, 50A: Connection unit 51: Rotation drive unit (cylinder mechanism) 51A: Cylinder mechanism 51a: Piston rod 51b: Connecting spring 51c: Piston rod (first connection part) 52, 52A: Link mechanism 53: First connection part 54: Second connection part 55: Flange 56: Electromagnet 57: Container 58: Damping material 60: Control unit 70: Damping switching device (damping switching device of tuned mass damper)

Claims

1. A damping switching device that performs vibration attenuation and non-attenuation of a tuned mass damper installed directly or indirectly on the floor of a building, the tuned mass damper comprising a gantry, a spring installed on the gantry, and a mass supported by the spring, and an accelerometer being installed directly or indirectly on the floor. In the damping switching device of the tuned mass damper, a connecting unit comprising a first connecting part that connects to the tuned mass damper, a second connecting part that contacts a damping material without connecting to the tuned mass damper, and a connecting mechanism that forms a connected posture and a disconnected posture between the first connecting part and the second connecting part; a control unit that stores an acceleration threshold value that serves as a reference when operating the connecting mechanism, acquires measurement data from the accelerometer, operates the connecting mechanism when the measurement data is less than the acceleration threshold value to form the connected posture and attenuate the vibration of the tuned mass damper, and operates the connecting mechanism when the measurement data is greater than or equal to the acceleration threshold value to form the disconnected posture and not attenuate the vibration of the tuned mass damper. The damping switching device of the tuned mass damper is characterized by having the above.

2. The connecting mechanism is a rotation driving part that is rotatable about a fulcrum provided on the mass and pushes a part of the first connecting part to rotate the first connecting part; The damping switching device of the tuned mass damper according to claim 1, characterized by comprising an electromagnet or a permanent magnet that is provided on one of the first connecting part and the second connecting part and magnetically adsorbs to the other.

3. The connecting mechanism is an electromagnet that is attached to the mass and is the first connecting part, and is provided on one of the first connecting part and the second connecting part and magnetically adsorbs to the other. The damping switching device of the tuned mass damper according to claim 1 is characterized by this.

4. A container for accommodating the damping material is installed on the gantry, and a part of the second connecting part is accommodated in the container in a posture of contacting the damping material. The damping switching device of the tuned mass damper according to claim 2 or 3 is characterized by this.

5. The damping switching device of the tuned mass damper according to claim 4, characterized in that a flange extending in the lateral direction is provided in a region of the second connecting part that contacts the damping material.

6. The damping switching device of the tuned mass damper according to claim 5, characterized in that the gantry is installed directly or indirectly on a beam that supports the floor.

7. The damping switching device for a tuned mass damper according to claim 5, characterized in that the pedestal is installed on the floor slab of a double floor.

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