Vibration damping device

Abstract

To provide a damping device that can facilitate adjustment of a natural frequency.SOLUTION: A damping device 10 comprises: a frame 37 laid between first H-section steel 11 and second H-section steel 12; a plurality of pins 38 protruding upward from the frame 37; a vibrating member 36 supported by the plurality of pins 38; and a damping member 39 clamped by the frame 37 and the vibrating member 36 between the plurality of pins 38, and for damping vibration of the vibrating member 36. The vibrating member 36 comprises a plate spring 42 supported by the plurality of pins 38, and a weight 43 fixed to the plate spring 42 between the plurality of pins 38. The frame 37 movably supports the plurality of pins 38.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to a vibration damping device for a building.

Background Art

[0002] In Patent Document 1, a vibration damping device is disclosed in which one end of a horizontal leaf spring is fixed to a pedestal installed on the floor, a mass and a damper are installed at the other end, and a pin is disposed movably along the leaf spring at an intermediate portion. A load is applied downward to the leaf spring of the vibration damping device by the mass.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When adjusting the natural frequency of the vibration damping device, it is necessary to lift the mass to a state where no load is applied to the leaf spring and then move the pin, which is troublesome. Further, since the contact pressure between the pin and the leaf spring changes depending on the position of the pin, the movement distance of the pin and the change amount of the natural frequency do not necessarily match.

[0005] The present invention has been made in view of the above-described circumstances, and an object thereof is to provide a vibration damping device capable of easily adjusting the natural frequency.

Means for Solving the Problems

[0006] (1) The vibration damping device according to claim 1 includes a frame spanned between a first beam and a second beam, a plurality of pins protruding upward from the frame, a vibration member supported by the plurality of pins, and a damping member sandwiched between the frame and the vibration member between the plurality of pins for damping the vibration of the vibration member. The vibration member has a leaf spring supported by the plurality of pins and a weight fixed to the leaf spring between the plurality of pins, and the frame movably supports the plurality of pins.

[0007] By moving the pins supporting the leaf spring, the natural frequency of the frame can be easily changed while supporting the vibration member.

[0008] (2) Claim 2 is the vibration damping device according to claim 1, wherein the frame has a through hole penetrating in the vertical direction, and the pin is fixed to the frame by a fixing member while being inserted into the through hole.

[0009] The pin can be fixed to the fixing member and then fixed to the through hole.

[0010] (3) Claim 3 is the vibration damping device according to claim 2, wherein the frame further has a plate-shaped receiving portion facing the lower surfaces of both ends of the leaf spring, an opening portion opening at a position sandwiched by the receiving portion below the weight, and a supporting portion supporting the receiving portion between the first beam and the second beam.

[0011] Since an opening portion is formed in the frame below the weight, the weight does not interfere with the frame even if the leaf spring is deformed.

[0012] (4) Claim 4 is the vibration damping device according to claim 3, wherein the through hole extends along a direction away from the weight in the receiving portion, and the damping member is sandwiched between the supporting portion and the weight.

[0013] (5) Claim 5 is the vibration damping device according to any one of claims 1 to 4, wherein a plurality of the pins are each located at both ends of the leaf spring, three in number.

[0014] Since both ends of the leaf spring are supported by three pins respectively, while each of the leaf springs can be supported by two pins, the remaining pins can be moved. Therefore, the adjustment operation of the natural frequency of the vibrating member can be performed while maintaining a stable state. Further, even when the natural frequency is adjusted, since the height of the vibrating member is maintained by the two pins, there is no operation of attaching and detaching the damping member due to a change in the height of the vibrating member.

[0015] (6) Claim 6 is the vibration damping device according to any one of claims 1 to 5, wherein the frame has a connecting portion connecting to the first beam and the second beam, the first beam and the second beam each have an upper flange and a lower flange opposing the upper flange, and the connecting portion is surrounded by the upper flange and the lower flange in the vertical direction.

[0016] Since the support portion is connected in a state of being surrounded between the upper flange and the lower flange, the frame is not accidentally detached from the first beam and the second beam due to vibration.

Advantages of the Invention

[0017] The vibration damping device according to the present invention enables easy adjustment of the natural frequency.

Brief Description of the Drawings

[0018]

Figure 1

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Figure 9

[0019] Hereinafter, embodiments of the present invention will be described. It should be noted that the embodiments described below are merely examples of the present invention, and it goes without saying that the embodiments of the present invention can be appropriately changed without departing from the gist of the present invention. In the following description, the vertical direction 1 is defined based on the state in which the vibration damping device 10 is installed for use (the state of FIG. 1). The front-rear direction 2 is defined as the direction in which the first H-shaped steel 11 extends and is perpendicular to the vertical direction 1. The left-right direction 3 is defined as the direction in which the vibration damping device 10 is spanned over the first H-shaped steel 11 and the second H-shaped steel 12 and is perpendicular to both the vertical direction 1 and the front-rear direction 2.

[0020] The vibration damping device 10 in the present embodiment is a tuned mass damper that dampens the vertical vibration of the floor in a building such as a house or an apartment, and one or more units are used for one building. As shown in FIGS. 1 and 2, the vibration damping device 10 is located between a first H-shaped steel (an example of a first beam) 11 supported by some of a plurality of columns in the building and a second H-shaped steel (an example of a second beam) 12 supported by a column on the right side of the first H-shaped steel 11. The first H-shaped steel 11 and the second H-shaped steel 12 receive vibrations from the floor. The first H-shaped steel 11 and the second H-shaped steel 12 are formed of three plate-like portions and are long in the front-rear direction 2.

[0021] The first H-shaped steel 11 has a first upper flange 15 extending along the front-rear direction 2 and the left-right direction 3, a first lower flange 16 located below the first upper flange 15 and extending in parallel, and a first web 17 connecting the central portions of the first upper flange 15 and the first lower flange 16. The lower surface 18 of the first upper flange 15 faces the upper surface 19 of the first lower flange 16. The first web 17 extends along the up-down direction 1 and the front-rear direction 2, and the surfaces of the first web 17 facing left and right are orthogonal to the lower surface 18 of the first upper flange 15 and the upper surface 19 of the first lower flange 16.

[0022] The second H-shaped steel 12 has the same shape as the first H-shaped steel 11, and has a second upper flange 25, a second lower flange 26, and a second web 27. The lower surface 28 of the second upper flange 25 faces the upper surface 29 of the second lower flange 26. The surfaces of the second web 27 facing left and right are orthogonal to the lower surface 28 of the second upper flange 25 and the upper surface 29 of the second lower flange 26.

[0023] The vibration damping device 10 damps the vibration transmitted from the floor to the first H-shaped steel 11 and the second H-shaped steel 12. The vibration damping device 10 includes a vibration member 36, a frame 37, a pin 38, and a damping member 39.

[0024] The vibration member 36 is located above the frame 37 and resonates with the vibration transmitted from the floor to the first H-shaped steel 11 and the second H-shaped steel 12. The vibration member 36 has a leaf spring 42 and a weight 43. The leaf spring 42 has a flat plate shape along the front-rear direction 2 and the left-right direction 3 and is formed of a metal material. The leaf spring 42 is supported from below at both ends 44 by six pins 38 protruding upward from the frame 37. The leaf spring 42 is curved downward from the central portion 45 toward both ends 44. The position of the central portion 45 of the leaf spring 42 in the up-down direction 1 is located above both ends 44.

[0025] The weight 43 is fixed to the leaf spring 42. The weight 43 is supported at the central portion 45 of the leaf spring 42. As shown in FIGS. 3 and 4, the weight 43 has a first weight 48 and a second weight 49. The first weights 48 are a pair and sandwich the leaf spring 42 in the vertical direction 1. Each of the upper and lower first weights 48 is fixed to each other through through-holes (not shown) by three bolts 51 and nuts 52 located at the left end and three bolts 53 and nuts 54 located at the right end. Each of the first weights 48 has a predetermined thickness and is rectangular when viewed from the vertical direction 1. Each of the first weights 48 has dimensions in the front-rear direction 2 that are larger than those of the leaf spring 42 and dimensions in the left-right direction 3 that are smaller than those of the leaf spring 42.

[0026] The second weight 49 sandwiches the first weight 48 in the vertical direction 1. Each of the upper and lower second weights 49 has the same thickness as the first weight 48. Each of the second weights 49 is rectangular when viewed from the vertical direction 1. Each of the second weights 49 is disposed at the central portion of the first weight 48 in the front-rear direction 2 and the left-right direction 3. Each of the second weights 49 has dimensions that are smaller than those of the first weight 48 in the front-rear direction 2 and the left-right direction 3. Each of the second weights 49 has through-holes (not shown) penetrating in the vertical direction 1 at four angular positions when viewed from the vertical direction 1 and is fixed to the first weight 48 by bolts 58. Each of the second weights 49 has dimensions that are smaller than those of the leaf spring 42 in the front-rear direction 2.

[0027] The frame 37 is spanned between the first H-shaped steel 11 and the second H-shaped steel 12 and supports the vibrating member 36. The frame 37 is connected to the first H-shaped steel 11 and the second H-shaped steel 12 by a connecting portion 90 described later and receives vibrations transmitted through the first H-shaped steel 11 and the second H-shaped steel 12. As shown in FIGS. 5 and 6, the frame 37 has a receiving portion 60, an opening 61, a through-hole 62, and a support portion 63.

[0028] The receiving part 60 supports the vibrating member 36. The receiving part 60 has a first receiving part 66 and a second receiving part 67. The first receiving part 66 is located closer to the first H-shaped steel 11 between the first H-shaped steel 11 and the second H-shaped steel 12. The first receiving part 66 has a predetermined thickness and is plate-shaped along the front-rear direction 2 and the left-right direction 3. The first receiving part 66 supports three pins 38 so as to be movable in the left-right direction 3. The upper surface 68 of the first receiving part 66 faces the lower surface of the left end portion 80 of the leaf spring 42.

[0029] The second receiving part 67 is located closer to the second H-shaped steel 12 between the first H-shaped steel 11 and the second H-shaped steel 12. The second receiving part 67 has the same shape as the first receiving part 66. The second receiving part 67 supports three pins 38 so as to be movable in the left-right direction 3. The upper surface 70 of the second receiving part 67 faces the lower surface of the right end portion 81 of the leaf spring 42. The first receiving part 66 and the second receiving part 67 overlap with the first weight 48 located below the leaf spring 42 in the up-down direction 1 (see FIG. 2).

[0030] The opening 61 is partitioned into the first receiving part 66 and the second receiving part 67 in the left-right direction 3, and is partitioned into a first support part 84 and a second support part 85 in the front-rear direction 2. The opening 61 opens in the up-down direction 1. The opening 61 has larger dimensions than the first weight 48 in the front-rear direction 2 and the left-right direction 3 (see FIG. 1). The opening 61 has larger dimensions than the leaf spring 42 in the front-rear direction 2 and smaller dimensions than the leaf spring 42 in the left-right direction 3.

[0031] The through holes 62 are located below both end portions 44 of the leaf spring 42 in the receiving part 60. The through holes 62 extend in a direction away from the first weight 48 and the second weight 49, that is, along the left-right direction 3. As shown in FIGS. 5 and 6, the through holes 62 have a first through hole 72 located in the first receiving part 66 and a second through hole 73 located in the second receiving part 67. The first through hole 72 is a hole that penetrates in the up-down direction 1 in the first receiving part 66 and extends along the left-right direction 3. The first through hole 72 is located at three positions: the central position in the front-rear direction 2 of the first receiving part 66, the position closer to the front in the front-rear direction 2, and the position closer to the rear in the front-rear direction 2.

[0032] The second through-hole 73 is a hole that penetrates vertically 1 in the second receiving portion 67 and extends along the left-right direction 3. The second through-hole 73 is located at three positions: the central position in the front-back direction 2 of the second receiving portion 67, the forward position in the front-back direction 2, and the rearward position in the front-back direction 2.

[0033] The first through-hole 72 and the second through-hole 73 each guide the movement of the pin 38. As shown in FIG. 6, the pin 38 is a bolt that is inserted downward into each of the first through-hole 72 and the second through-hole 73. The pin 38 is inserted downward into each of the first through-hole 72 and the second through-hole 73 with a wing nut 74 screwed thereon. The pin 38 is screwed to a fixing member 75 that is stacked on top of three first through-holes 72 and second through-holes 73 arranged in the front-back direction 2. The fixing member 75 has a protruding portion 76 that protrudes downward at a position separated from the pin 38. The protruding portion 76 is the head of a bolt screwed onto the fixing member 75 from below. The protruding portion 76 fits into the first through-hole 72 and the second through-hole 73. The three pins 38 located in the first through-hole 72 support the left end portion 80 of the leaf spring 42. The three pins 38 located in the second through-hole 73 support the right end portion 81 of the leaf spring 42.

[0034] The support portion 63 supports the first receiving portion 66 and the second receiving portion 67 between the first H-shaped steel 11 and the second H-shaped steel. As shown in FIGS. 5 and 6, the support portion 63 has a first support portion 84 and a second support portion 85. The first support portion 84 is plate-shaped. The first support portion 84 has a predetermined thickness in the front-back direction 2. The rear surface 86 of the first support portion 84 facing the rear extends along the vertical direction 1 and the left-right direction 3. The front ends of the first receiving portion 66 and the second receiving portion 67 are connected at the central position in the vertical direction 1 on the rear surface 86 of the first support portion 84.

[0035] The second support portion 85 is plate-shaped. The second support portion 85 has a predetermined thickness in the front-rear direction 2. The front surface 87 of the second support portion 85 facing forward extends along the vertical direction 1 and the left-right direction 3. At the central position in the vertical direction 1 on the front surface 87, the rear ends of the first receiving portion 66 and the second receiving portion 67 are connected.

[0036] As shown in FIG. 1, the connecting portion 90 connects the frame 37 to the first H-shaped steel 11 and the second H-shaped steel 12. As shown in FIGS. 7 and 8, the connecting portion 90 includes a first connecting portion 91 that connects the left end of the first support portion 84 to the first H-shaped steel 11, a second connecting portion 92 that connects the right end of the first support portion 84 to the second H-shaped steel 12, a third connecting portion 93 that connects the left end of the second support portion 85 to the first H-shaped steel 11, and a fourth connecting portion 94 that connects the right end of the second support portion 85 to the second H-shaped steel 12.

[0037] As shown in FIG. 7, the first connecting portion 91 includes a first wall 97, a first expanding wall 98, and a first extending wall 99. The first wall 97 is plate-shaped and extends along the vertical direction 1 and the left-right direction 3, and is fixed to the left end of the first support portion 84 by bolts 100 and nuts 101 through a through hole (not shown) penetrating in the front-rear direction 2. The first expanding wall 98 extends into the region surrounded by the first upper flange 15, the first lower flange 16, and the first web 17 of the first H-shaped steel 11 from the first wall 97. The first extending wall 99 extends in a direction intersecting the first expanding wall 98 and extends along the surface facing downward of the first upper flange 15, the surface facing rightward of the first web 17, and the surface facing upward of the first lower flange 16. The first extending wall 99 is fixed to the first upper flange 15 and the first lower flange 16 by bolts 102 and nuts 103.

[0038] The second connecting portion 92 has a second wall 105, a second expanding wall 106, and a second extending wall 107. The second wall 105 is plate-shaped along the vertical direction 1 and the horizontal direction 3, and is fixed to the right end of the second support portion 85 by bolts 108 and nuts 109 through a through hole (not shown) penetrating in the front-rear direction 2. The second expanding wall 106 extends from the second wall 105 into the region surrounded by the second upper flange 25, the second lower flange 26, and the second web 27 of the second H-shaped steel 12. The second extending wall 107 extends in a direction intersecting the second expanding wall 106 and is along the surface facing downward of the second upper flange 25, the surface facing left of the second web 27, and the surface facing upward of the second lower flange 26. The second extending wall 107 is fixed to the second upper flange 25 and the second lower flange 26 by bolts 110 and nuts 111.

[0039] The third connecting portion 93 has a third wall 113, a third expanding wall 114, and a third extending wall 115. The third wall 113 is plate-shaped along the vertical direction 1 and the horizontal direction 3, and is fixed to the left end of the support portion 63 by bolts 116 and nuts 117 through a through hole (not shown) penetrating in the front-rear direction 2. The third expanding wall 114 extends from the third wall 113 into the region surrounded by the first upper flange 15, the first lower flange 16, and the first web 17 of the first H-shaped steel 11. The third extending wall 115 extends in a direction intersecting the third expanding wall 114 and is along the surface facing downward of the first upper flange 15, the surface facing right of the first web 17, and the surface facing upward of the first lower flange 16. The third extending wall 115 is fixed to the first upper flange 15 and the first lower flange 16 by bolts 118 and nuts 119.

[0040] The fourth connecting portion 94 has a fourth wall 121, a fourth expanding wall 122, and a fourth extending wall 123. The fourth wall 121 is plate-shaped along the vertical direction 1 and the left-right direction 3, and is fixed to the right end of the second support portion 85 by bolts 124 and nuts 125 through a through hole (not shown) penetrating in the front-rear direction 2. The fourth expanding wall 122 extends from the fourth wall 121 into the region surrounded by the second upper flange 25, the second lower flange 26, and the second web 27 of the second H-shaped steel 12. The fourth extending wall 123 extends in a direction intersecting the fourth expanding wall 122, and is along the surface facing downward of the second upper flange 25, the surface facing leftward of the second web 27, and the surface facing upward of the second lower flange 26. The fourth extending wall 123 is fixed to the second upper flange 25 and the second lower flange 26 by bolts 126 and nuts 127.

[0041] The damping member 39 damps the vibration of the vibrating member 36. The damping member 39 is formed of an elastic material such as rubber. As shown in FIG. 9, the damping member 39 has a first member 130 located in front of the first weight 48 and a second member 131 located behind the first weight 48. More specifically, the front side of the first member 130 is in contact with a first flat plate 133 fixed to the rear surface 86 of the first support portion 84 by a bolt 132. The rear side of the first member 130 is in contact with a first fitting 135 fixed by a bolt 134 from the left-right direction 3 so as to surround the front end of the first weight 48. The first member 130 is sandwiched between the first fitting 135 and the first flat plate 133 in a state where two are arranged in the left-right direction 3 and two are arranged vertically.

[0042] The rear side of the second member 131 is in contact with a second flat plate 139 fixed to the front surface 87 of the second support portion 85 by bolts 138. The front side of the second member 131 is in contact with a second fitting 141 fixed by bolts 140 in the left - right direction 3 so as to surround the rear end of the first weight 48. The second member 131 is sandwiched between the second fitting 141 and the second flat plate 139 in a state where two are arranged in the left - right direction 3 and two are arranged vertically. The movement of the vibration member 36 with respect to the frame 37 is restricted by the first member 130 and the second member 131. The first member 130 and the second member 131 attenuate the vibration of the vibration member 36 with respect to the frame 37.

[0043] [Adjustment of natural frequency] The vibration damping device 10 can change the frequency at which the vibration member 36 resonates by moving the pin 38. For example, when moving the pin 38 located at the center in the front - rear direction 2 of the first receiving portion 66, the operator loosens the pin 38 fastened to the fixing member 75 by rotating the wing nut 74. At this time, the tip of the pin 38 is located below the two pins 38 located closer to the front and rear of the first receiving portion 66. In this state, while the leaf spring 42 is supported by the two pins 38 located closer to the front and rear of the first receiving portion 66, the loosened pin 38 can be moved along the first through - hole 72. After the operator moves the pin 38 to a position where the desired natural frequency is obtained, the operator tightens the wing nut 74. The frame 37 is sandwiched between the wing nut 74 and the fixing member 75 and the pin 38 is fixed with respect to the frame 37. When the wing nut 74 is tightened, the fixing member 75 approaches the first receiving portion 66 and the protruding portion 76 enters the first through - hole 72. In this state, since the rotation of the pin 38 is restricted by the protruding portion 76 even when the fixing member 75 rotates, the operator can surely screw the pin 38 into the fixing member 75 without holding the fixing member 75. The pins 38 located closer to the front and rear of the first receiving portion 66 and the pin 38 located at the second receiving portion 67 are also moved by the same operation, and the frequency at which the vibration member 36 resonates is changed.

[0044] [Operational effects of the embodiment] The pin 38 that supports the leaf spring 42 can be moved along the first through-hole 72 and the second through-hole 73. Thereby, while supporting the vibrating member 36, the natural frequency of the frame 37 can be easily changed.

[0045] The pin 38 can be fixed to the fixing member 75 superposed on the first through-hole 72 of the first receiving portion 66 and the second through-hole 73 of the second receiving portion 67, thereby fixing the pin 38 to the first receiving portion 66 and the second receiving portion 67.

[0046] An opening 61 is formed in the frame 37 at a position between the first receiving portion 66 and the second receiving portion 67 in the left-right direction 3 and below the second weight 49. Therefore, even if the leaf spring 42 is elastically deformed by vibration, the second weight 49 does not interfere with the frame 37.

[0047] Since both end portions 44 of the leaf spring 42 are each supported by three pins 38, while each of the both end portions 44 is supported by two pins 38, the remaining one pin 38 can be moved. Therefore, the adjustment operation of the natural frequency of the vibrating member 36 can be performed while maintaining a stable state. Further, even if the natural frequency is adjusted, since the position of the vibrating member 36 in the vertical direction 1 is maintained by the two pins 38, the operation of attaching and detaching the damping member 39 does not occur due to the change in the position of the vibrating member 36 in the vertical direction 1.

[0048] Since the first connecting portion 91 and the third connecting portion 93 are surrounded between the first upper flange 15 and the first lower flange 16, and the second connecting portion 92 and the fourth connecting portion 94 are surrounded between the second upper flange 25 and the second lower flange 26 and then connected, the frame 37 is not unexpectedly detached from the first H-shaped steel 11 and the second H-shaped steel 12 due to vibration.

[0049] [Modification Example] In the above-described embodiment, the case where the pin 38 is supported so as to be movable in the left-right direction 3 along the first through-hole 72 and the second through-hole 73 has been described as an example, but the present invention is not limited to this configuration. For example, the pin 38 may move along a groove. The gist is that as long as the pin 38 can move in the left-right direction 3 to change the vibration frequency at which the vibration member 36 resonates.

[0050] In the above-described embodiment, the case where the frame 37 is supported by the first support portion 84 and the second support portion 85 such that the first receiving portion 66 and the second receiving portion 67 are supported and the opening 61 is located between the first receiving portion 66 and the second receiving portion 67 has been described as an example, but the present invention is not limited to this configuration. The frame 37 only needs to support the vibration member 36 by a plurality of pins 38, and may not have the first support portion 84, the second support portion 85, or the opening 61.

[0051] In the above-described embodiment, the case where the first through-hole 72 and the second through-hole 73 extend along the left-right direction 3 that is separated from the first weight 48 and the second weight 49 has been described as an example, but the present invention is not limited to this configuration. The first through-hole 72 and the second through-hole 73 may include, for example, a portion extending along the front-rear direction 2. The gist is that as long as the first through-hole 72 and the second through-hole 73 can change the vibration frequency at which the vibration member 36 resonates by moving the pin 38.

[0052] In the above-described embodiment, the case where the first member 130 is sandwiched between the first flat plate 133 and the first fitting 135 and the second member 131 is sandwiched between the second flat plate 139 and the second fitting 141 has been described as an example, but the present invention is not limited to this configuration. The first member 130 may be sandwiched between the first support portion 84 and the first weight 48, and the second member 131 may be sandwiched between the second support portion 85 and the first weight 48. Further, the first member 130 and the second member 131 may be sandwiched between the second weight 49 instead of between the first weight 48.

[0053] In the above-described embodiment, the case where three pins 38 are located in each of the first receiving portion 66 and the second receiving portion 67 has been described as an example, but the present invention is not limited to this configuration. Two pins 38 may be located respectively, or four or more pins 38 may be located respectively.

[0054] In the above-described embodiment, the case where the first expanded wall 98 is surrounded in the vertical direction 1 by the first upper flange 15 and the first lower flange 16 of the first H-shaped steel 11 from the first wall 97 has been described as an example, but the present invention is not limited to this configuration. The first expanded wall 98 may, for example, surround the first upper flange 15 and the first lower flange 16 from the vertical direction 1, or either the first upper flange 15 or the first lower flange 16 may be located outside in the vertical direction 1. The same applies to the second expanded wall 106, the third expanded wall 114, and the fourth expanded wall 122.

[0055] In the above-described embodiment, the protruding portion 76 that fits into the first through hole 72 and the second through hole 73 has been described as an example of the head of a bolt screwed into the fixing member 75 from below, but the present invention is not limited to this configuration. The protruding portion 76 may be, for example, a protrusion protruding downward from the fixing member 75.

[0056] [Appendix 1] A frame spanned between a first beam and a second beam, A plurality of pins protruding upward from the above frame, A vibrating member supported by the plurality of above pins, A damping member sandwiched between the above frame and the above vibrating member between the plurality of above pins and damping the vibration of the above vibrating member, and The above vibrating member is A leaf spring supported by the plurality of above pins, A weight fixed to the leaf spring between the plurality of above pins, and The above frame is a vibration damping device that movably supports the plurality of above pins.

[0057] [Appendix 2] The above frame has a through hole penetrating in the vertical direction, The vibration damping device according to Supplementary Note 1, wherein the pin is fixed to the frame by a fixing member while being inserted into the through hole.

[0058] [Supplementary Note 3] The frame has a plate-shaped receiving portion facing the lower surfaces of both ends of the leaf spring, and an opening portion that opens at a position sandwiched between the receiving portions below the weight, and further has a support portion that supports the receiving portion between the first beam and the second beam. The vibration damping device according to Supplementary Note 2.

[0059] [Supplementary Note 4] The through hole extends along a direction away from the weight in the receiving portion, and the damping member is sandwiched between the support portion and the weight. The vibration damping device according to Supplementary Note 3.

[0060] [Supplementary Note 5] In the vibration damping device according to Supplementary Note 1 or 2, three of the plurality of pins are respectively located at both ends of the leaf spring.

[0061] [Supplementary Note 6] The frame has a connecting portion that connects to the first beam and the second beam, the first beam and the second beam each have an upper flange and a lower flange facing the upper flange, and the connecting portion is surrounded by the upper flange and the lower flange in the vertical direction. The vibration damping device according to Supplementary Note 1 or 2.

Explanation of Reference Numerals

[0062] 10 ··· Vibration damping device 11 ··· First H-shaped steel (first beam) 12 ··· Second H-shaped steel (second beam) 15 ··· First upper flange (upper flange) 25 ··· Second upper flange (upper flange) 16 ··· First lower flange (lower flange) 26 ··· Second lower flange (lower flange) 36 ··· Vibration member 37 ··· Frame 38 ··· Pin 39 ··· Damping member 42 ··· Leaf spring 43 ··· Weight 44 ··· Both ends of the leaf spring 42 60 ··· Receiving part 61 ··· Opening 62 ··· Through hole 63 ··· Support part 75 ··· Fixing member 90 ··· Connecting part

Claims

1. A frame spanned between a first beam and a second beam, a plurality of pins protruding upward from the frame, a vibrating member supported by the plurality of pins, and a damping member sandwiched between the frame and the vibrating member between the plurality of pins to damp the vibration of the vibrating member. The vibrating member includes a leaf spring supported by the plurality of pins, and a weight fixed to the leaf spring between the plurality of pins. The frame is a vibration damping device that movably supports the plurality of pins.

2. The frame has a through hole penetrating in the vertical direction, and the pin is fixed to the frame by a fixing member while being inserted into the through hole. The vibration damping device according to Claim 1.

3. The frame includes plate-like receiving portions facing the lower surfaces of both ends of the leaf spring, an opening portion that opens at a position sandwiched between the receiving portions below the weight, and a support portion that supports the receiving portion between the first beam and the second beam. The vibration damping device according to Claim 2.

4. The through hole extends along a direction away from the weight in the receiving portion, and the damping member is sandwiched between the support portion and the weight. The vibration damping device according to Claim 3.

5. Three of the plurality of pins are respectively located at both ends of the leaf spring. The vibration damping device according to Claim 1 or 2.

6. The frame has a connecting portion that connects to the first beam and the second beam, The first beam and the second beam each have an upper flange and a lower flange facing the upper flange. The vibration damping device according to claim 1 or 2, wherein the connecting portion is surrounded by the upper flange and the lower flange in the vertical direction.

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