JP2021092298A - Vibration control device - Google Patents

Abstract

To provide a vibration control device capable of enhancing durability.SOLUTION: A vibration control device 1 according to an embodiment comprises: a first member 10 which is installed on one of a pair of installed sections arranged along a first direction D1 and has a plurality of first plate sections 12 arranged along a second direction D2 intersecting with the first direction D1; a second member 20 which is installed on the other of the pair of installed sections and has a plurality of second plate sections 22 each put into a gap between two first plate sections 12; a shaft 33 which connects the first member 10 and the second member 20 in such a manner that the first plate sections 12 and the second plate sections 22 are penetrated in the second direction D2; sliding materials 50 which are installed on one of the first plate sections 12 and the second plate sections 22; and friction materials 40 which are installed on the other of the first plate sections 12 and the second plate sections 22 so as to face the sliding material 50. The sliding materials 50 are respectively installed on one side of the shaft 33 in the first direction D1 and on the other side of the shaft 33 in the first direction D1 independently of each other.SELECTED DRAWING: Figure 2

Description

One aspect of the disclosure relates to a damping device.

Patent Document 1 describes a friction damper device that suppresses vibration of a structure by a frictional force. The friction damper device includes a friction sliding plate connected to a member of a structure, a friction material that is pressed against the friction sliding plate to generate frictional force, a metal plate to be tightened that tightens the friction material, and a friction sliding plate. It also includes bolts and nuts that penetrate the metal plate to be tightened. A disc spring and a pair of washers are provided between the nut and the metal plate to be tightened, and the disc spring is sandwiched between the pair of washers. This disc spring is provided to suppress fluctuations in the tightening axial force of the bolt that occurs when the friction sliding plate slides.

The friction sliding plate is fastened to a tightening bolt and a nut while being sandwiched between two metal plates to be tightened. The friction material is interposed between each of the pair of metal plates to be tightened and the friction sliding plate, and is fitted to each of the pair of metal plates to be tightened. The friction sliding plate is provided with a sliding hole for a tightening bolt, and the friction sliding plate is slidable along the direction in which the sliding hole extends. In the friction sliding plate, the sliding hole is formed in an oval shape, and the bolt moves inside the oval sliding hole so that the friction sliding plate can move with respect to the friction material. There is.

Japanese Unexamined Patent Publication No. 8-193635

In the friction damper described above, the friction sliding plate moves with respect to the friction material by moving the bolt along the sliding hole inside the oval sliding hole. Therefore, when the bolt moves along the sliding hole, the friction sliding plate may be deformed at both ends of the sliding hole in the direction in which the sliding hole extends. That is, when the bolt moves along the sliding hole, stress is concentrated on the end of the sliding hole in the moving direction of the bolt, and there is a concern that the friction sliding plate is deformed by this stress. Therefore, there is a concern about deformation of the friction sliding plate, and there is room for improvement in the durability of the vibration damping device.

The vibration damping device according to one aspect of the present disclosure is attached to one of a pair of attached portions arranged along the first direction, and has a plurality of first plate portions arranged along the second direction intersecting the first direction. A first member having a first member, a second member having a plurality of second plate portions attached to the other of the pair of attached portions, and having a plurality of second plate portions inserted between the two first plate portions, and a first plate portion and a second plate portion. A shaft that connects the first member and the second member to each other while penetrating in the second direction, a sliding member provided on either one of the first plate portion and the second plate portion, and the first plate portion and the first plate portion. A friction material provided on either one of the two plate portions and facing the sliding material is provided, and the sliding material is provided on one side of the shaft in the first direction and on the other side of the shaft in the first direction. They are arranged independently of each other.

In this vibration damping device, the first member has a plurality of first plate portions, the second member has a plurality of second plate portions, and a plurality of second plate portions are located between the plurality of first plate portions. Each is intruding. Therefore, the first plate portion and the second plate portion are alternately arranged along the second direction, and the first member and the shaft penetrate the first plate portion and the second plate portion along the second direction. The second members are connected to each other. A sliding material is provided on either one of the first plate portion and the second plate portion, and a friction material is provided on the other, and the sliding material and the friction material face each other. Further, the sliding members are arranged independently of each other on one side of the shaft in the first direction and on the other side of the shaft in the first direction. Therefore, the shaft is not passed through the elongated hole as described above, but moves between the pair of sliding members. Therefore, even if the shaft moves, stress concentration does not occur in the sliding members. .. Therefore, it is possible to avoid stress concentration on the sliding material due to the sliding of the sliding material, so that the durability of the vibration damping device can be improved.

The number of sliding materials arranged along the second direction and the number of friction materials arranged along the second direction may both be 4 or more.

The shaft is located between a pair of sliding materials arranged along the first direction, and when viewed from the second direction, the outer edge of the sliding material and the outer edge of the friction material face the shaft. The distance from the outer edge of the friction material on the shaft side to the outer edge of the sliding material on the shaft side may be 1 times or more and 2 times or less the distance from the outer edge of the sliding material to the outer circumference of the shaft.

The length of the third direction intersecting both the first direction and the second direction may be longer than the length of the first direction.

In the vibration damping device, when viewed from the second direction, the friction material is contained inside the sliding material, from the outer edge of the friction material opposite to the shaft to the outer edge of the sliding material opposite to the shaft. The distance may be 1 times or more and 2 times or less the distance between the outer edge of the sliding material on the shaft side and the outer circumference of the shaft.

The sliding material and the friction material may be arranged at positions symmetrical with respect to the shaft.

According to one aspect of the present disclosure, durability can be enhanced.

FIG. 1 is a perspective view showing a vibration damping device according to an embodiment. FIG. 2 is a side view showing the vibration damping device of FIG. FIG. 3 is a front view showing the vibration damping device of FIG. FIG. 4 is a side view showing the shaft, sliding material, and friction material of the vibration damping device of FIG. 5 (a) and 5 (b) are diagrams schematically showing a state in which the sliding material and the friction material move relative to each other. FIG. 6 is a side view showing a sliding material and a friction material according to a comparative example.

Hereinafter, a mode for implementing the vibration damping device according to the present disclosure will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding elements are designated by the same reference numerals, and duplicate description will be omitted as appropriate. For ease of understanding, the drawings may be partially simplified or exaggerated, and the dimensional ratios and the like are not limited to those described in the drawings.

In the present disclosure, the "vibration damping device" is a device that suppresses shaking caused by an earthquake or the like, and is, for example, mounted between a pair of mounted portions. The “attached portion” indicates a portion to which the vibration damping device is attached, and includes, for example, between the beams of the building or between the columns of the building. By mounting the vibration damping device between the pair of attached portions in this way, it is possible to reduce the shaking generated between the pair of attached portions and suppress the shaking of the building or the like.

FIG. 1 is a perspective view showing a vibration damping device 1 according to an embodiment. FIG. 2 is a side view showing the vibration damping device 1. The vibration damping device 1 is, for example, a wall-type friction damper mounted on a wall. As shown in FIGS. 1 and 2, the vibration damping device 1 is a friction damper including a first member 10 attached to one attached portion P1 and a second member 20 attached to the other attached portion P2. Is.

The attached portion P1 and the attached portion P2 are arranged along the first direction D1. The first direction D1 is, for example, the vertical direction. In the following, the direction in which the attached portion P1 is provided may be upward when viewed from the vibration damping device 1, and the direction in which the attached portion P2 is provided may be downward when viewed from the vibration damping device 1. However, these directions are for convenience of explanation in the embodiment and do not limit the directions.

Each of the first member 10 and the second member 20 has a plurality of plate portions, and each plate portion has a thickness in the second direction D2 intersecting the first direction D1. The first member 10 has a protruding portion 11 projecting in the first direction D1, and the protruding portion 11 is formed with a plurality of hole portions 11b through which bolts for fixing the first member 10 to the mounted portion P1 are inserted. ing. The protruding portion 11 projects, for example, from the center of the second direction D2 of the first member 10 toward the attached portion P1.

The plurality of holes 11b of the protrusions 11 are arranged along a third direction D3 that intersects both the first direction D1 and the second direction D2, for example. The protruding portion 11 has, for example, a plate shape extending in the first direction D1 and the third direction D3, and each of the plurality of hole portions 11b penetrates in the second direction D2. As an example, the shape of the lower part of the protrusion 11 is trapezoidal. However, the shape of the protruding portion 11 is not limited to the above example and can be changed as appropriate. The second direction D2 is the thickness direction of the protrusion 11, and for example, the third direction D3 corresponds to the direction in which a plurality of columns are lined up. For example, the first member 10 is displaced relative to the second member 20 in the third direction D3 when the vibration damping device 1 is shaken by an earthquake or the like. The number of holes 11b is 9 as an example.

For example, the length L1 of the vibration damping device 1 in the third direction D3 (horizontal direction as an example) is longer than the length L2 of the vibration damping device 1 in the first direction D1 (vertical direction as an example). The length L1 of the vibration damping device 1 in the third direction D3 is, for example, 400 mm or more and 1000 mm or less, 600 mm or more and 1000 mm or less, and 600 mm as an example. The length L2 of the vibration damping device 1 in the first direction D1 is, for example, 300 mm or more and 900 mm or less, 400 mm or more and 700 mm or less, and 550 mm as an example.

The first member 10 has, for example, a plurality of first plate portions 12 projecting to the opposite side (lower side as an example) of the projecting portion 11. The plurality of first plate portions 12 are arranged along the second direction D2, and a first gap 13 is formed between the two first plate portions 12 arranged along the second direction D2. The first member 10 has, for example, a first plate portion 12 and a first gap 13 arranged along the second direction D2, and the first plate portion 12 and the first gap 13 alternate along the second direction D2. They are lined up. Therefore, when viewed from the third direction D3, the plurality of first plate portions 12 are arranged in a comb-teeth shape.

The first member 10 includes a plurality of first connecting plate portions 14 and a plurality of second connecting portions interposed between the two first plate portions 12, in addition to the above-mentioned protruding portion 11 and the plurality of first plate portions 12. It has a plate portion 15. For example, the upper surface 14b of the first connecting plate portion 14 and the upper surface 15b of the second connecting plate portion 15 are aligned with the upper surface 12b of the first plate portion 12. The length of the first connecting plate portion 14 in the first direction D1 and the length of the second connecting plate portion 15 in the first direction D1 are shorter than, for example, the length of the first plate portion 12 in the first direction D1.

The lower surface 12c of the first plate portion 12 projects toward the attached portion P2 side (downward) from, for example, the lower surface 14c of the first connecting plate portion 14 and the lower surface 15c of the second connecting plate portion 15. As an example, four first plate portions 12 are arranged along the second direction D2, and between the first plate portion 12 on the end side of the second direction D2 and the first plate portion 12 on the center side. Each of the pair of first connecting plate portions 14 is arranged in.

For example, between the pair of first plate portions 12 on the center side of the second direction D2, a pair of second connecting plate portions 15 arranged along the second direction D2 are arranged, and a pair of second connecting plates are arranged. A protruding portion 11 is arranged between the portions 15. The first gap 13 is, for example, between the lower surface 14c of the first connecting plate portion 14 and the surface 12d of the first plate portion 12 facing the second direction D2, and the lower surface 11c of the protruding portion 11 and the second connecting plate portion 15. A first gap 13 is defined in each of the lower surface 15c of the above surface and the surface 12d of the first plate portion 12.

For example, a through hole 16 penetrating in the second direction D2 is formed in each of the projecting portion 11, the first plate portion 12, the first connecting plate portion 14, and the second connecting plate portion 15, and the through hole 16 is formed. Bolt 17, which is a high-strength bolt, is inserted. The bolt 17 is inserted into the through hole 16 from one side of the second direction D2 of the first member 10 (first plate portion 12), for example, and is inserted into the through hole 16 in the second direction of the first member 10 (first plate portion 12). The bolt 17 exposed from the other side of D2 is tightened to the nut 19 via a washer 18. The first member 10 is integrated by tightening the protrusion 11, the first plate 12, the first connecting plate 14, and the second connecting plate 15 with the bolts 17 and nuts 19. The through hole 16, the bolt 17, the washer 18, and the nut 19 are arranged so as to be arranged along the third direction D3. For example, the number of the through hole 16, the bolt 17, the washer 18, and the nut 19 is 5.

The second member 20 has a protrusion 21 that protrudes in the direction opposite to the protrusion 11 of the first member 10, and a plurality of bolts that fix the second member 20 to the attached portion P2 are inserted into the protrusion 21. The hole 21b is formed. The protruding portion 21 protrudes from the center of the second direction D2 of the second member 20 toward the attached portion P2, for example. The plurality of holes 21b of the protrusions 21 are arranged along, for example, the third direction D3, and the protrusions 21 have a plate shape extending in the first direction D1 and the third direction D3. As an example, the protruding portion 21 has a rectangular shape. However, the shape of the protruding portion 21 is not limited to the rectangular shape and can be changed as appropriate.

For example, the area of the surface extending in the first direction D1 and the third direction D3 of the protruding portion 21 is wider than the area of the surface extending in the first direction D1 and the third direction D3 of the protruding portion 11, and the volume of the protruding portion 21 is larger. It may be larger than the volume of the protrusion 11. For example, the length of the protrusion 21 in the first direction D1 is longer than the length of the protrusion 11 in the first direction D1. Each of the plurality of holes 21b penetrates in the second direction D2, and for example, the number of holes 21b is nine. The position of each hole 21b in the third direction D3 may coincide with the position of each hole 11b in the third direction D3.

The second member 20 has, for example, a plurality of second plate portions 22 projecting to the opposite side of the projecting portion 21. Each of the plurality of second plate portions 22 is inserted between the two first plate portions 12. The plurality of second plate portions 22 are arranged along the second direction D2. A second gap 23 is formed between the two second plate portions 22 arranged along the second direction D2. For example, the second member 20 has a second plate portion arranged along the second direction D2. It has 22 and a second gap 23. For example, the second plate portion 22 and the second gap 23 are alternately arranged along the second direction D2. Therefore, the second plate portions 22 are arranged in a comb-teeth shape when viewed from the third direction D3.

The second member 20 has, for example, a pair of connecting plate portions 24 interposed between the protruding portion 21 and the second plate portion 22, and the lower surface 24b of the connecting plate portion 24 is aligned with the lower surface 22b of the second plate portion 22. Has been done. The length of the connecting plate portion 24 in the first direction D1 is shorter than, for example, the length of the second plate portion 22 in the first direction D1. The upper surface 22c of the second plate portion 22 protrudes toward the mounted portion P1 side (upper side) from the upper surface 24c of the connecting plate portion 24, for example.

As an example, three second plate portions 22 are arranged along the second direction D2, and between the second plate portion 22 on the end side of the second direction D2 and the second plate portion 22 on the center side. A pair of connecting plate portions 24 are arranged in the. For example, the second plate portion 22 on the central side is arranged between the pair of connecting plate portions 24. The second gap 23 is defined between the upper surface 24c of the connecting plate portion 24 and the surfaces 21d and 22d of the second plate portion 22 facing the second direction D2.

For example, each of the projecting portion 21, the second plate portion 22, and the connecting plate portion 24 is formed with a through hole 25 penetrating in the second direction D2, and the through hole 25 is provided with a bolt 26 which is a high-strength bolt. It has been inserted. The bolt 26 is inserted into the through hole 25 from one side of the second direction D2 of the second member 20 (second plate portion 22), for example, and is inserted into the through hole 25 in the second direction of the second member 20 (second plate portion 22). The bolt 26 exposed from the other side of D2 is tightened to the nut 28 via a washer 27. The through hole 25, the bolt 26, the washer 27, and the nut 28 are arranged so as to line up along the third direction D3. For example, the number of through holes 25, bolts 26, washers 27, and nuts 28 is greater than the number of through holes 16, bolts 17, washers 18, and nuts 19, respectively, and is 6, for example.

For example, the first plate portion 12 of the first member 10 and the second plate portion 22 of the second member 20 are alternately arranged along the second direction D2. That is, at least one of the plurality of first plate portions 12 has entered the second gap 23 of the second member 20 from above, and at least one of the plurality of second plate portions 22 has entered the first gap 23 of the first member 10. It has entered 13 from below. For example, in the first gap 13, the second plate portion 22 projects upward, and in the second gap 23, the first plate portion 12 projects downward.

As an example, two of the four first plate portions 12 of the first member 10 have entered the second gap 23, and the three second plate portions 22 of the second member 20 have entered the first gap 13. It's getting in. For example, the number of the upper first plate portion 12 is larger than the number of the lower second plate portion 22. In this way, when the number of the upper first plate portions 12 is larger than the number of the lower second plate portions 22, the number of the first gaps 13 facing downward is larger than the number of the second gaps 23 facing upward. Can be increased. Further, the first plate portion 12 may be located on both ends of the second direction D2 of the second plate portion 22 that defines the second gap 23. In this case, it is possible to prevent foreign matter such as water from entering the second gap 23.

Connecting plate portions 31 are provided at both ends of the second direction D2 in the portion where the first plate portion 12 and the second plate portion 22 are alternately arranged along the second direction D2. Through holes 32 penetrating in the second direction D2 are formed in the first plate portion 12 and the second plate portion 22. A shaft 33 inserted through the hole 31b of the connecting plate portion 31 is inserted into the through hole 32. The shaft 33 is, for example, a high-strength bolt.

For example, the shaft 33 is inserted into the through hole 32 from the hole 31b of the connecting plate portion 31 located on one side of the second direction D2, and is exposed from the connecting plate portion 31 on the other side of the second direction D2. Is fastened to the nut 35 via a washer 34. As an example, a spring washer 36 and a washer 37 are interposed between the connecting plate portion 31 on one side of the second direction D2 and the head portion 33b of the shaft 33. For example, a plurality of spring washers 36 may be arranged in a bundled state along the second direction D2.

FIG. 3 is a front view of the vibration damping device 1 as viewed from the second direction D2. In FIG. 3, the connecting plate portion 31 is not shown, and the through hole 32, the shaft 33, the washer 34, and the nut 35 are shown by solid lines. As shown in FIGS. 2 and 3, the through hole 32 is, for example, an elongated hole extending along the third direction D3, and the shaft 33 is inserted through the through hole 32. The shaft 33, the washer 34, and the nut 35 are arranged so as to be arranged along the third direction D3. For example, the number of each of the shaft 33, the washer 34, and the nut 35 is 3. However, the number of the shaft 33, the washer 34, and the nut 35 is not limited to 3, and can be changed as appropriate.

The second plate portion 22 can be displaced relative to the shaft 33, the connecting plate portion 31, and the first plate portion 12 along the third direction D3. As a result, the first member 10 and the second member 20 can be relatively displaced along the third direction D3. For example, a friction material 40 is provided on the surface 12d of the first plate portion 12 facing the second direction D2, and a sliding member 50 is provided on the surface 22d of the second plate portion 22 facing the second direction D2. ing. The friction coefficient of the friction material 40 is larger than the friction coefficient of the sliding material 50.

Instead of the above example, the sliding material 50 may be provided on the second plate portion 22 and the friction material 40 may be provided on the first plate portion 12. The friction material 40 may contain, for example, a phenol resin and a metal powder (or carbon powder). The friction material 40 may be a thermosetting resin in which the mixed material is compressed and hardened. The material of the friction material 40 is not limited to the above, and can be changed as appropriate. The sliding member 50 is made of, for example, stainless steel (SUS).

For example, a plurality of friction materials 40 are arranged so as to overlap along the second direction D2. The number of friction materials 40 arranged along the second direction D2 is, for example, 4 or more, and 6 as an example. Like the friction material 40, the sliding material 50 is also arranged so as to overlap along the second direction D2. That is, the number of sliding members 50 arranged along the second direction D2 is, for example, 4 or more, and 6 as an example.

The friction material 40 and the sliding material 50 face each other along the second direction D2 in each of the first gap 13 and the second gap 23. For example, a plurality of friction materials 40 may be arranged along the third direction D3, and as an example, three friction materials 40 may be arranged along the third direction D3. However, the number of friction materials 40 is not limited to 3, and can be changed as appropriate. For example, the shapes of the friction member 40 and the sliding member 50 as seen from the second direction D2 are long extending in the third direction D3, and are rectangular as an example. However, the respective shapes of the friction member 40 and the sliding member 50 as viewed from the second direction D2 may be an oval shape, an elliptical shape, or a polygonal shape other than a rectangle, and can be appropriately changed.

For example, the width of the first direction D1 of the friction material 40 is narrower than the width of the first direction D1 of the sliding material 50, and the length of the third direction D3 of the friction material 40 is the third direction of the sliding material 50. It is shorter than the length of D3. For example, the friction material 40 is housed inside the sliding material 50 when viewed from the second direction D2. Friction materials 40 are provided on one side and the other side of the first direction D1 with respect to the shaft 33, and for example, a pair of friction materials 40 are arranged at positions symmetrical with respect to the shaft 33. ..

Sliding members 50 are provided on one side and the other side of the first direction D1 with respect to the shaft 33, and the sliding members 50 and the shaft 33 located on one side of the first direction D1 of the shaft 33. It is independent of the sliding member 50 located on the other side of the one direction D1. That is, the pair of sliding members 50 arranged along the first direction D1 are arranged independently of each other. "Arranged independently of each other" indicates a state in which a pair of objects are separated (divided) from each other without having a connection point and are separated from each other.

FIG. 4 is a diagram schematically showing the positional relationship between the shaft 33, the friction material 40, and the sliding material 50. 5 (a) and 5 (b), respectively, schematically show the displacement of the friction member 40 with respect to the sliding member 50 when the first member 10 and the second member 20 are relatively displaced in the third direction D3. It is a figure. As shown in FIGS. 4, 5 (a) and 5 (b), when the first member 10 and the second member 20 are displaced relative to the third direction D3, one of the first member 10 and the second member 20 Each friction member 40 fixed to the other is displaced relative to each sliding member 50 fixed to the other in the third direction D3. For example, the friction material 40 and the sliding material 50 are in contact with each other. When the vibration damping device 1 is shaken by an earthquake or the like, the friction material 40 in contact with the sliding material 50 slides on the sliding material 50, so that the energy of the shaking is absorbed and the shaking is suppressed. Be done.

Each friction material 40 has an outer edge 41 extending in the third direction D3 and facing the shaft 33 side, an outer edge 42 extending in the third direction D3 and facing the opposite side of the shaft 33, and extending in the first direction D1 and in the third direction. It has a pair of outer edges 43 that line up along D3. Like each friction material 40, each sliding member 50 also has an outer edge 51 extending in the third direction D3 and facing the shaft 33 side, an outer edge 52 extending in the third direction D3 and facing the opposite side of the shaft 33, and a first. It has a pair of outer edges 53 extending along direction D1 and lining up along third direction D3. For example, the diameter C of the shaft 33 is smaller than the distance between the pair of outer edges 51 aligned along the first direction D1.

As described above, when viewed from the second direction D2, the friction material 40 is housed inside the sliding material 50, and each of the outer edge 41, the outer edge 42, and the outer edge 43 of the friction material 40 is the sliding material 50. It is located inside each of the outer edge 51, the outer edge 52, and the outer edge 53. That is, the outer edge 41 is located closer to the center of the sliding member 50 in the first direction D1 than the outer edge 51, and the outer edge 42 is located closer to the center of the sliding member 50 in the first direction D1 than the outer edge 52. The outer edge 43 is located closer to the center of the sliding member 50 in the third direction D3 than the outer edge 53.

For example, the outer edge 41, the outer edge 51, and the outer peripheral 33c of the shaft 33 are arranged in this order along the first direction D1, and the distance K1 from the outer peripheral 33c to the outer edge 51 is larger than the distance K2 from the outer edge 51 to the outer edge 41. short. As an example, the distance K2 from the outer edge 51 to the outer edge 41 may be 1 time or more and 2 times or less the distance K1 from the outer circumference 33c to the outer edge 51. The distance K2 may be 1.2 times or more and 1.8 times or less of the distance K1, and as an example, it may be 1.3 times or more and 1.7 times or less.

The distance K3 from the outer edge 52 to the outer edge 42 may be longer than, for example, the distance K1 from the outer peripheral 33c to the outer edge 51, and may be about the same as the distance K2 from the outer edge 51 to the outer edge 41. The distance K3 from the outer edge 52 to the outer edge 42 may be one or more and twice or less the distance K1 from the outer circumference 33c to the outer edge 51. The distance K3 may be 1.2 times or more and 1.8 times or less of the distance K1, and as an example, it may be 1.3 times or more and 1.7 times or less.

Next, the operation and effect of the vibration damping device 1 according to the embodiment will be described. As shown in FIG. 2, in the vibration damping device 1, the first member 10 has a plurality of first plate portions 12, the second member 20 has a plurality of second plate portions 22, and a plurality of first plates. Each of the plurality of second plate portions 22 is inserted between the plate portions 12. Therefore, the first plate portion 12 and the second plate portion 22 are alternately arranged along the second direction D2, and the shaft 33 penetrates the first plate portion 12 and the second plate portion 22 along the second direction D2. In this state, the first member 10 and the second member 20 are connected to each other. A sliding member 50 is provided on one of the first member 10 and the second member 20 (second member 20 in the above example), and a friction member 40 is provided on the other (first member 10 in the above example). The sliding member 50 and the friction member 40 face each other.

FIG. 6 shows the friction material 140 and the sliding material 150 of the conventional comparative example. As shown in FIG. 6, the sliding member 150 has an oval elongated hole 132 extending in the third direction D3. Then, the shaft 33 moves along the third direction D3 inside the elongated hole 132, and the friction material 140 slides with respect to the sliding material 150. At this time, the sliding member 150 may be deformed at both end portions R of the elongated hole 132 in the third direction D3 where the elongated hole 132 extends. Specifically, when the shaft 33 moves along the elongated hole 132, stress is concentrated on both end portions R of the elongated hole 132 in the moving direction of the shaft 33 (third direction D3), and the stress causes the sliding member 150. Is concerned about deformation.

On the other hand, as shown in FIGS. 2 and 4, the sliding members 50 are independent of each other on one side of the shaft 33 in the first direction D1 and on the other side of the shaft 33 in the first direction D1. Have been placed. Therefore, the shaft 33 is not passed through the elongated hole 132 described above, but moves between the pair of sliding members 50. Therefore, even if the shaft 33 moves, the stress is concentrated on the sliding members 50. Does not occur. Therefore, it is possible to avoid stress concentration on the sliding member 50 due to the sliding of the sliding member 50, so that the durability of the vibration damping device 1 can be improved.

The number of sliding members 50 arranged along the second direction D2 and the number of friction members 40 arranged along the second direction D2 may both be 4 or more (6 in the example of FIG. 2). In this case, since the number of layers of the sliding member 50 and the friction member 40 laminated along the second direction D2 can be 4 or more, the sliding member 50 and the friction when viewed from the second direction D2. The area of the material 40 can be reduced. Therefore, both the first member 10 having the first plate portion 12 and the second member 20 having the second plate portion 22 can be made smaller, so that the vibration damping device 1 can be made compact.

The shaft 33 is located between a pair of sliding members 50 arranged along the first direction D1, and when viewed from the second direction D2, the outer edge 51 of the sliding member 50 and the outer edge of the friction member 40. 41 may face the shaft 33. The distance K2 from the outer edge 41 on the shaft 33 side of the friction material 40 to the outer edge 51 on the shaft 33 side of the sliding material 50 is at least one time the distance K1 from the outer edge 51 of the sliding material 50 to the outer circumference 33c of the shaft 33. It may be twice or less.

In this case, the distance K2 from the outer edge 41 of the friction material 40 to the outer edge 51 of the sliding material 50 is one or more times the distance K1 from the outer edge 51 of the sliding material 50 to the outer circumference 33c of the shaft 33. The 40 can be sufficiently separated from the shaft 33. The distance K2 from the outer edge 41 of the friction material 40 to the outer edge 51 of the sliding material 50 is less than twice the distance K1 from the outer edge 51 of the sliding material 50 to the outer circumference 33c of the shaft 33, so that the material is exposed from the friction material 40. Since the area of the sliding member 50 can be reduced, the durability of the sliding member 50 can be improved.

As shown in FIG. 1, the length L1 of the vibration damping device 1 in the third direction D3 may be longer than the length L2 of the vibration damping device 1 in the first direction D1. In this case, regarding the length of the vibration damping device 1, the length L1 in the third direction D3 is longer than the length L2 in the first direction D1 in which the pair of attached portions P1 and P2 are lined up. Therefore, the vibration damping device 1 can be attached even at a place where the distance between the pair of attached portions P1 and P2 is narrow. Therefore, the degree of freedom in the arrangement of the vibration damping device 1 can be increased.

As shown in FIGS. 2 and 4, when viewed from the second direction D2, the friction material 40 is housed inside the sliding material 50, and is from the outer edge 42 of the friction material 40 on the opposite side to the shaft 33. The distance K3 of the sliding material 50 to the outer edge 52 on the opposite side of the shaft 33 is 1 times or more and 2 times or less the distance K1 from the outer edge 51 of the sliding material 50 on the shaft 33 side to the outer circumference 33c of the shaft 33. There may be.

In this case, the distance K3 from the outer edge 42 of the friction material 40 to the outer edge 52 of the sliding material 50 is one or more times the distance K1 from the outer edge 51 of the sliding material 50 to the outer circumference 33c of the shaft 33. A sufficient width of 40 can be secured. Further, since the distance K3 from the outer edge 42 of the friction material 40 to the outer edge 52 of the sliding material 50 is less than twice the distance K1 from the outer edge 51 of the sliding material 50 to the outer circumference 33c of the shaft 33, the friction material 40 Since it is possible to suppress the increase in size of the vibration damping device 1, it contributes to the compactness of the vibration damping device 1.

The sliding member 50 and the friction member 40 may be arranged at positions symmetrical with respect to the shaft 33. In this case, since the sliding material 50 and the friction material 40 can be arranged in a well-balanced manner, vibration can be stably absorbed by the sliding material 50 and the friction material 40.

In the vibration damping device 1 according to the present embodiment, the friction member 40 and the sliding member 50 are alternately arranged along the second direction D2. Therefore, the friction materials 40 can be kept away from each other, and the friction materials 40 can be slid on the sliding material 50. Therefore, while withstanding slight shaking, when a large vibration is generated, the vibration energy of the vibration can be effectively absorbed by sliding the friction material 40 on the sliding material 50, and the vibration damping device 1 can be further compacted. Contribute to the conversion.

The embodiment of the vibration damping device according to the present disclosure has been described above. However, the present disclosure is not limited to the embodiments described above. The vibration damping device according to the present disclosure can be variously modified without changing the gist described in the claims. The shape, size, number, material, and arrangement of each part of the vibration damping device can be appropriately changed within the scope of the above gist.

For example, in the above-described embodiment, an example in which the number of holes 11b and 21b is 9, an example in which the number of bolts 17 is 5, and an example in which the number of bolts 26 is 6 has been described. However, the number of bolts, nuts, washers and holes of the vibration damping device is not limited to each of the above examples and can be changed as appropriate. The same applies to the number of friction materials and the number of sliding materials. That is, in the above-described embodiment, an example in which the number of the friction member 40 and the sliding member 50 arranged along the second direction D2 is six has been described. However, the number of the friction member 40 and the sliding member 50 arranged along the second direction D2 may be, for example, 4, and can be changed as appropriate.

In the above-described embodiment, the upper two first plate portions 12 are inserted into the second gap 23, the lower three second plate portions 22 are inserted into the first gap 13, and the upper first plate portion 22 is inserted. An example in which the number of one plate portion 12 is larger than the number of the lower second plate portion 22 has been described. However, the number of the upper first plate portion may be smaller than the number of the lower second plate portion, and the number of the first plate portion and the number of the second plate portion can be appropriately changed.

In the above-described embodiment, the vibration damping device 1 is a wall-type friction damper and is mounted between the mounted portions P1 and the mounted portions P2 arranged along the vertical direction (first direction D1). Was explained. However, the direction in which the pair of attached portions are arranged is not limited to the vertical direction, and may be, for example, a horizontal direction or an oblique direction inclining with respect to both the vertical direction and the horizontal direction, and can be appropriately changed. .. Further, the vibration damping device according to the present disclosure may be applied to a damper other than the wall type friction damper.

1 ... Vibration damping device, 10 ... First member, 11 ... Projection, 11b ... Hole, 11c ... Lower surface, 12 ... First plate, 12b ... Upper surface, 12c ... Lower surface, 12d ... Surface, 13 ... First gap , 14 ... 1st connecting plate, 14b ... upper surface, 14c ... lower surface, 15 ... second connecting plate, 15b ... upper surface, 15c ... lower surface, 16 ... through hole, 17 ... bolt, 18 ... washer, 19 ... nut, 20 ... 2nd member, 21 ... projecting portion, 21b ... hole portion, 21d ... surface, 22 ... second plate portion, 22b ... lower surface, 22c ... upper surface, 22d ... surface, 23 ... second gap, 24 ... connecting plate portion , 24b ... bottom surface, 24c ... top surface, 25 ... through hole, 26 ... bolt, 27 ... washer, 28 ... nut, 31 ... connecting plate, 31b ... hole, 32 ... through hole, 33 ... shaft, 33b ... head, 33c ... Outer circumference, 34 ... Washer, 35 ... Nut, 36 ... Spring washer, 37 ... Washer, 40 ... Friction material, 41, 42, 43 ... Outer edge, 50 ... Sliding material, 51, 52, 53 ... Outer edge, D1 ... 1st direction, D2 ... 2nd direction, D3 ... 3rd direction, K1, K2, K3 ... Distance, P1, P2 ... Attached part.

Claims (6)

A first member having a plurality of first plate portions arranged along a second direction intersecting the first direction, which is attached to one of a pair of attached portions arranged along the first direction.
A second member which is attached to the other of the pair of attached portions and has a plurality of second plate portions which are inserted between the two first plate portions.
A shaft that connects the first member and the second member to each other while penetrating the first plate portion and the second plate portion in the second direction.
Sliding material provided on either the first plate portion or the second plate portion, and
A friction material provided on either one of the first plate portion and the second plate portion and facing the sliding material is provided.
The sliding members are arranged independently of each other on one side of the shaft in the first direction and on the other side of the shaft in the first direction.
Vibration damping device. The number of the sliding materials arranged along the second direction and the number of the friction materials arranged along the second direction are both 4 or more.
The vibration damping device according to claim 1. The shaft is located between the pair of sliding members arranged along the first direction.
When viewed from the second direction, the outer edge of the sliding material and the outer edge of the friction material face the shaft.
The distance from the outer edge of the friction material on the shaft side to the outer edge of the sliding material on the shaft side is 1 times or more and 2 times or less the distance from the outer edge of the sliding material to the outer circumference of the shaft.
The vibration damping device according to claim 1 or 2. The length of the third direction intersecting both the first direction and the second direction is longer than the length of the first direction.
The vibration damping device according to any one of claims 1 to 3. When viewed from the second direction, the friction material is contained inside the sliding material.
The distance from the outer edge of the friction material on the opposite side of the shaft to the outer edge of the sliding material on the opposite side of the shaft is the distance from the outer edge of the sliding material on the shaft side to the outer circumference of the shaft. 1x or more and 2x or less,
The vibration damping device according to any one of claims 1 to 4. The sliding material and the friction material are arranged at positions symmetrical with respect to the shaft.
The vibration damping device according to any one of claims 1 to 5.

Images