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 control device for a building. [Background technology]

[0002] Patent Document 1 discloses a vibration damping device in which one end of a horizontal leaf spring is fixed to a base placed on the floor, a mass and a damper are attached to the other end, and a pin is disposed in the middle so as to be movable along the leaf spring. A downward load is applied to the leaf spring of the vibration damping device by the mass. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 6-240924 Summary of the Invention [Problem to be solved by the invention]

[0004] When adjusting the natural frequency of the vibration control device, it is necessary to lift the mass to remove the load from the leaf spring before moving the pin, which is time-consuming. In addition, since the contact pressure between the pin and the leaf spring changes depending on the position of the pin, the moving distance of the pin does not necessarily match the change in the natural frequency.

[0005] The present invention has been made in consideration of the above-mentioned circumstances, and an object of the present invention is to provide a vibration damping device that allows easy adjustment of the natural frequency. [Means for solving the problem]

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

[0007] By moving the pins that support the leaf springs, the natural frequency of the frame can be easily changed while supporting the vibrating member.

[0008] (2) Claim 2 is a vibration damping device as claimed in 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 to fix the pin in the through hole.

[0010] (3) Claim 3 is a vibration damping device as described in claim 2, wherein the frame further has a plate-shaped receiving portion facing the underside of both ends of the leaf spring, an opening portion that opens at a position below the weight and sandwiched between the receiving portion, and a support portion that supports the receiving portion between the first beam and the second beam.

[0011] Since an opening 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 a vibration damping device according to claim 3, wherein the through hole extends in the receiving portion in a direction away from the weight, and the damping member is sandwiched between the support portion and the weight.

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

[0014] Since both ends of the leaf spring are supported by three pins, each leaf spring is supported by two pins while the remaining pins can be moved. This allows the adjustment of the natural frequency of the vibrating member while remaining in a stable state. In addition, even when the natural frequency is adjusted, the height of the vibrating member is maintained by the two pins, so there is no need to attach or remove the damping member due to the change in the height of the vibrating member.

[0015] (6) Claim 6 is a vibration damping device described in any one of claims 1 to 5, wherein 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 opposite 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 while being enclosed between the upper flange and the lower flange, the frame will not unexpectedly come off the first beam and the second beam due to vibration. Effect of the Invention

[0017] The vibration damping device according to the present invention allows the natural frequency to be easily adjusted. [Brief description of the drawings]

[0018] [Figure 1] FIG. 1 is a diagram showing an example of a vibration damping device 10 according to the present invention together with a first H-shaped steel 11 and a second H-shaped steel 12. As shown in FIG. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II of FIG. [Diagram 3] FIG. 3 is a view of the vibration member 36 as viewed from above. [Figure 4] FIG. 4 is a front view of the vibrating member 36 shown in FIG. [Diagram 5]FIG. 5 is a view of the frame 37 as viewed from above. [Figure 6] FIG. 6 is a cross-sectional view taken along line VI-VI shown in FIG. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. [Figure 8] FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG. [Figure 9] FIG. 9 is a diagram of the first member 130 and the second member 131 positioned between the weight 43 and the support portion 63, as viewed from the left. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0019] Hereinafter, an embodiment of the present invention will be described. Note that the embodiment described below is merely one example of the present invention, and it goes without saying that the embodiment of the present invention can be appropriately modified without changing the gist of the present invention. In the following description, the up-down direction 1 is defined based on the state in which the vibration damping device 10 is installed so as to be usable (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 up-down direction 1, and the left-right direction 3 is defined as the direction in which the vibration damping device 10 is spanned across the first H-shaped steel 11 and the second H-shaped steel 12 and is perpendicular to both the up-down direction 1 and the front-rear direction 2.

[0020] The vibration damping device 10 in this embodiment is a tuned mass damper that damps the vertical vibration of a floor in a building such as a house or an apartment, and one or more units are used for one building. As shown in Fig. 1 and Fig. 2, in the building, 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, and a second H-shaped steel (an example of a second beam) 12 supported by a column to the right of the first H-shaped steel 11. The first H-shaped steel 11 and the second H-shaped steel 12 receive vibration from the floor. The first H-shaped steel 11 and the second H-shaped steel 12 are formed of three plate-shaped parts 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 central portions of the first upper flange 15 and the first lower flange 16. A lower surface 18 of the first upper flange 15 faces an 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 surface of the first web 17 facing left and the surface facing right are perpendicular 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 a shape similar to that of the first H-shaped steel 11, and has a second upper flange 25, a second lower flange 26, and a second web 27. A lower surface 28 of the second upper flange 25 faces an upper surface 29 of the second lower flange 26. The leftward and rightward surfaces of the second web 27 are perpendicular 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 vibrations 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 vibrating member 36, a frame 37, a pin 38, and a damping member 39.

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

[0025] The weight 43 is fixed to the leaf spring 42. The weight 43 is supported at the center 45 of the leaf spring 42. As shown in FIG. 3 and FIG. 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 up-down direction 1. The upper and lower first weights 48 are 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 in the up-down direction 1. The dimension of each of the first weights 48 in the front-rear direction 2 is larger than that of the leaf spring 42, and smaller than that of the leaf spring 42 in the left-right direction 3.

[0026] The second weights 49 sandwich the first weight 48 in the vertical direction 1. The upper and lower second weights 49 each have 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 in the center of the first weight 48 in the front-rear direction 2 and the left-right direction 3. Each of the second weights 49 has smaller dimensions than 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 corner 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 smaller dimensions than the leaf springs 42 in the front-rear direction 2.

[0027] The frame 37 is bridged 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 below, and receives vibrations through the first H-shaped steel 11 and the second H-shaped steel 12. As shown in Fig. 5 and Fig. 6, the frame 37 has a receiving portion 60, an opening portion 61, a through hole 62, and a supporting portion 63.

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

[0029] The second receiving portion 67 is located between the first H-shaped steel 11 and the second H-shaped steel 12, closer to the second H-shaped steel 12. The second receiving portion 67 has the same shape as the first receiving portion 66. The second receiving portion 67 supports the three pins 38 so that they can move in the left-right direction 3. The upper surface 70 of the second receiving portion 67 faces the lower surface of the right end portion 81 of the leaf spring 42. The first receiving portion 66 and the second receiving portion 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 a first receiving portion 66 and a second receiving portion 67 in the left-right direction 3, and into a first support portion 84 and a second support portion 85 in the front-rear direction 2. The opening 61 is open in the up-down direction 1. The opening 61 has larger dimensions in the front-rear direction 2 and the left-right direction 3 than the first weight 48 (see FIG. 1 ). The opening 61 has a larger dimension in the front-rear direction 2 than the leaf spring 42, and a smaller dimension in the left-right direction 3 than the leaf spring 42.

[0031] The through holes 62 are located in the receiving portion 60 below both ends 44 of the leaf spring 42. The through holes 62 extend in a direction away from the first weight 48 and the second weight 49, i.e., 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 portion 66 and a second through hole 73 located in the second receiving portion 67. The first through hole 72 is a hole that penetrates the first receiving portion 66 in the up-down direction 1 and extends along the left-right direction 3. The first through holes 72 are located in three places: a central position in the front-rear direction 2 of the first receiving portion 66, a position closer to the front in the front-rear direction 2, and a position closer to the rear in the front-rear direction 2.

[0032] The second through holes 73 are holes that penetrate the second receiving portion 67 in the up-down direction 1 and extend along the left-right direction 3. The second through holes 73 are located at three positions: a central position in the front-to-rear direction 2 of the second receiving portion 67, a position closer to the front in the front-to-rear direction 2, and a position closer to the rear in the front-to-rear direction 2.

[0033] The first through hole 72 and the second through hole 73 guide the movement of the pin 38. As shown in FIG. 6, the pin 38 is a bolt inserted into each of the first through hole 72 and the second through hole 73 from below. The pin 38 is inserted into each of the first through hole 72 and the second through hole 73 from below with a wing nut 74 screwed into it. The pin 38 is screwed into a fixing member 75 that is placed on top of the three first through holes 72 and the three second through holes 73 that are aligned in the front-rear direction 2. The fixing member 75 has a protruding portion 76 that protrudes downward at a position spaced apart from the pin 38. The protruding portion 76 is the head of a bolt screwed into 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 positioned in the second through hole 73 support the right end 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 Figures 5 and 6, the support portion 63 has a first supporting portion 84 and a second supporting portion 85. The first supporting portion 84 is plate-shaped. The first supporting portion 84 has a predetermined thickness in the front-rear direction 2. The first supporting portion 84 has a rear surface 86 facing rearward that extends along the up-down 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 to the rear surface 86 of the first supporting portion 84 at a central position in the up-down direction 1.

[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 second support portion 85 has a front surface 87 facing forward that is aligned along the up-down direction 1 and the left-right direction 3. The second support portion 85 has rear ends of the first receiving portion 66 and the second receiving portion 67 connected to a center position of the front surface 87 in the up-down direction 1.

[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 has 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 has a first wall 97, a first expansion wall 98, and a first extension wall 99. The first wall 97 is a plate-like shape extending along the up-down direction 1 and the left-right direction 3, and is fixed to the left end of the first support portion 84 by a bolt 100 and a nut 101 through a through hole (not shown) penetrating in the front-rear direction 2. The first expansion wall 98 extends from the first wall 97 to an area 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 first extension wall 99 extends in a direction intersecting with the first expansion wall 98, and is along the surface of the first upper flange 15 facing downward, the surface of the first web 17 facing right, and the surface of the first lower flange 16 facing upward. The first extension 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 expansion wall 106, and a second extension wall 107. The second wall 105 is a plate-like shape extending along the up-down direction 1 and the left-right direction 3, and is fixed to the right end of the second support portion 85 by a bolt 108 and a nut 109 through a through hole (not shown) penetrating in the front-rear direction 2. The second expansion wall 106 extends from the second wall 105 to an area 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 extension wall 107 extends in a direction intersecting with the second expansion wall 106, and is along the surface of the second upper flange 25 facing downward, the surface of the second web 27 facing leftward, and the surface of the second lower flange 26 facing upward. The second extension 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 expansion wall 114, and a third extension wall 115. The third wall 113 is a plate-like shape extending along the up-down direction 1 and the left-right direction 3, and is fixed to the left end of the support portion 63 by a bolt 116 and a nut 117 through a through hole (not shown) penetrating in the front-rear direction 2. The third expansion wall 114 extends from the third wall 113 to an area 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 extension wall 115 extends in a direction intersecting with the third expansion wall 114, and is along the surface of the first upper flange 15 facing downward, the surface of the first web 17 facing right, and the surface of the first lower flange 16 facing upward. The third extension 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 expansion wall 122, and a fourth extension wall 123. The fourth wall 121 is a plate-like shape extending along the up-down direction 1 and the left-right direction 3, and is fixed to the right end of the second support portion 85 by a bolt 124 and a nut 125 through a through hole (not shown) penetrating in the front-rear direction 2. The fourth expansion wall 122 extends from the fourth wall 121 to an area 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 extension wall 123 extends in a direction intersecting with the fourth expansion wall 122, and is along the surface of the second upper flange 25 facing downward, the surface of the second web 27 facing leftward, and the surface of the second lower flange 26 facing upward. The fourth extension 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 part 84 by a bolt 132. The rear side of the first member 130 is in contact with a first metal 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 members 130 are sandwiched between the first metal fitting 135 and the first flat plate 133 in a state where two of the first members 130 are lined up in the left-right direction 3 and two are lined up above and below.

[0042] The rear side of the second member 131 is in contact with a second flat plate 139 fixed by a bolt 138 to the front surface 87 of the second support portion 85. The front side of the second member 131 is in contact with a second metal fitting 141 fixed by a bolt 140 from the left-right direction 3 so as to surround the rear end of the first weight 48. The second members 131 are sandwiched between the second metal fitting 141 and the second flat plate 139, with two of them lined up in the left-right direction 3 and two lined up above and below. The movement of the vibrating member 36 relative 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 damp the vibration of the vibrating member 36 relative to the frame 37.

[0043] [Natural frequency adjustment] The vibration damping device 10 can change the frequency at which the vibrating member 36 resonates by moving the pin 38. For example, when moving the pin 38 located at the center of the first receiving portion 66 in the front-rear direction 2, the worker rotates the wing nut 74 to loosen the pin 38 fastened to the fixing member 75. At this time, the tip of the pin 38 is located lower than the two pins 38 located in front and rear of the first receiving portion 66. In this state, the loosened pin 38 can be moved along the first through hole 72 while supporting the leaf spring 42 with the two pins 38 located in front and rear of the first receiving portion 66. The worker moves the pin 38 to a position where the desired natural frequency is obtained, and then 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 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, even if the pin 38 of the fixing member 75 rotates, the rotation is restricted by the protrusion 76, so that the operator can reliably screw the pin 38 into the fixing member 75 without holding the fixing member 75. The pins 38 located toward the front and rear of the first receiving portion 66 and the pin 38 located in the second receiving portion 67 can also be moved by the same operation, thereby changing the vibration frequency at which the vibrating member 36 resonates.

[0044] [Effects of the embodiment] The pin 38 supporting the leaf spring 42 can be moved along the first through hole 72 and the second through hole 73. This makes it possible to easily change the natural frequency of the frame 37 while supporting the vibrating member 36.

[0045] The pin 38 can be fixed to the first receiving portion 66 and the second receiving portion 67 by fixing the pin 38 to a fixing member 75 superimposed on the first through hole 72 of the first receiving portion 66 and on the second through hole 73 of 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, the second weight 49 does not interfere with the frame 37 even if the leaf spring 42 is elastically deformed by vibration.

[0047] Since both ends 44 of the leaf spring 42 are supported by three pins 38, each of the ends 44 can be supported by two pins 38 while the remaining one pin 38 can be moved. This allows the adjustment of the natural frequency of the vibrating member 36 while remaining in a stable state. Even when the natural frequency is adjusted, the position of the vibrating member 36 in the vertical direction 1 is maintained by the two pins 38, so there is no need to attach or detach the damping member 39 due to the position of the vibrating member 36 in the vertical direction 1 changing.

[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, the frame 37 will not unexpectedly come off the first H-shaped steel 11 and the second H-shaped steel 12 due to vibration.

[0049] [Variations] In the above embodiment, 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, but the present invention is not limited to this configuration. For example, the pin 38 may move along a groove. The purpose is that the pin 38 can move in the left-right direction 3 to change the vibration frequency at which the vibrating member 36 resonates.

[0050] In the above embodiment, the frame 37 is described as having the first receiving portion 66 and the second receiving portion 67 supported by the first supporting portion 84 and the second supporting portion 85, and the opening 61 is located between the first receiving portion 66 and the second receiving portion 67. However, the present invention is not limited to this configuration. The frame 37 may support the vibrating member 36 by a plurality of pins 38, and may not have the first supporting portion 84, the second supporting portion 85, or the opening 61.

[0051] In the above embodiment, the first through hole 72 and the second through hole 73 extend along the left-right direction 3 away from the first weight 48 and the second weight 49, 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 first through hole 72 and the second through hole 73 may have any configuration as long as they can change the resonating frequency of the vibrating member 36 by moving the pin 38.

[0052] In the above embodiment, the first member 130 is sandwiched between the first flat plate 133 and the first metal fitting 135, and the second member 131 is sandwiched between the second flat plate 139 and the second metal fitting 141, 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. Furthermore, 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 embodiment, an example has been described in which three pins 38 are positioned on each of the first receiving portion 66 and the second receiving portion 67, but the present invention is not limited to this configuration. Two pins 38 may be positioned on each of the first receiving portion 66 and the second receiving portion 67, or four or more pins may be positioned on each of the first receiving portion 66 and the second receiving portion 67.

[0054] In the above embodiment, the first expansion wall 98 is surrounded in the up-down direction 1 by the first wall 97 and the first upper flange 15 and the first lower flange 16 of the first H-shaped steel 11, but the present invention is not limited to this configuration. The first expansion wall 98 may, for example, surround the first upper flange 15 and the first lower flange 16 in the up-down direction 1, or one of the first upper flange 15 and the first lower flange 16 may be positioned on the outside in the up-down direction 1. The same is true for the second expansion wall 106, the third expansion wall 114, and the fourth expansion wall 122.

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

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

[0057] [Appendix 2] The frame has a through hole extending in the vertical direction, 2. The vibration damping device according to claim 1, wherein the pin is inserted into the through hole and fixed to the frame by a fixing member.

[0058] [Appendix 3] The above frame is A plate-shaped receiving portion facing the lower surface of each end of the leaf spring; an opening portion that opens at a position below the weight and sandwiched by the receiving portion; 3. The vibration damping device according to claim 2, further comprising a support portion that supports the receiving portion between the first beam and the second beam.

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

[0060] [Appendix 5] 3. The vibration damping device according to claim 1, wherein the plurality of pins are located at three ends of the leaf spring.

[0061] [Appendix 6] The frame has a connecting portion connected 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, 3. 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 up-down direction. [Explanation of symbols]

[0062] 10. Vibration control device 11...1st H-beam (1st beam) 12...2nd H-beam (2nd beam) 15···First upper flange (upper flange) 25...Second upper flange (upper flange) 16···First bottom flange (bottom flange) 26...Second bottom flange (bottom flange) 36... Vibration member 37. Frame 38···pin 39. Damping member 42 Leaf spring 43... weight 44 ... Both ends of leaf spring 42 60....Receiving part 61 Opening 62...Through hole 63...Support part 75...Fixing member 90...Connection part

Claims

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

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

3. The above frame is A plate-shaped receiving portion facing the lower surface of each end of the leaf spring; an opening portion that opens at a position below the weight and sandwiched by the receiving portion; The vibration damping device according to claim 2 , further comprising a support portion that supports the receiving portion between the first beam and the second beam.

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

5. 3. The vibration damping device according to claim 1, wherein three of the pins are located at each end of the leaf spring.

6. The frame has a connecting portion connected to the first beam and the second beam, The first beam and the second beam each have an upper flange and a lower flange opposite to 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 up-down direction.

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