Vibration damping mechanism and apparatus

Abstract

To provide a vibration control mechanism which is easily mounted in a rack, and to provide an apparatus including the vibration control mechanism.SOLUTION: The vibration control mechanism includes a rail unit which includes a plurality of rails, has a lower surface, and is placed so that the lower surface comes into contact with a plate surface of a shelf plate in a rack on which a computer can be mounted, a reaction part fixed to each rail, and a movable part which can slide on each rail and can collide with the reaction part.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present disclosure relates to vibration damping mechanisms and devices. [Background technology]

[0002] It is known to provide a vibration damping mechanism in the rack in order to improve the earthquake resistance performance. For example, Patent Document 1 discloses that a vibration control mechanism is installed inside a rack. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2014-58998 Summary of the Invention [Problem to be solved by the invention]

[0004] However, for example, if the internal space of a rack is thinly partitioned by shelves, a vibration control mechanism such as that disclosed in Patent Document 1 may not be able to be installed inside the rack.

[0005] In view of any of the above problems, an object of the present disclosure is to provide a vibration damping mechanism that can be easily installed in a rack and an apparatus equipped with the vibration damping mechanism. [Means for solving the problem]

[0006] A vibration control mechanism according to one aspect of the present disclosure comprises a plate having an upper plate surface and a lower plate surface, the lower plate surface being placed so that it contacts the plate surface of a shelf in a rack capable of mounting a computer, a reaction part fixed to the plate, and a movable part that is capable of sliding on the upper plate surface and colliding with the reaction part.

[0007] In a vibration damping mechanism according to one aspect of the present disclosure, the movable part surrounds the reaction part.

[0008] In a vibration damping mechanism according to one aspect of the present disclosure, the reaction force portion surrounds the movable portion.

[0009] A vibration control mechanism according to one aspect of the present disclosure includes an external member in which the movable part is capable of sliding relative to the reaction part in a first guide direction but is restricted from sliding relative to the reaction part in a second guide direction that intersects the first guide direction, and an internal member which is capable of sliding relative to the external member in the second guide direction but is restricted from sliding relative to the external member in the first guide direction.

[0010] A vibration control mechanism according to one aspect of the present disclosure comprises a rail unit having a plurality of rails, a lower surface, and being placed so that the lower surface is in contact with the surface of a shelf in a rack capable of mounting a computer; a reaction force portion fixed to each of the rails; and a movable portion that is capable of sliding on each of the rails and colliding with the reaction force portion.

[0011] In a vibration damping mechanism according to one aspect of the present disclosure, the reaction portion includes a pair of reaction bodies spaced apart from each other in the direction in which the rails extend.

[0012] In a vibration damping mechanism according to one aspect of the present disclosure, the plurality of rails include a first rail extending in a first rail direction and a second rail extending in a second rail direction that intersects with the first rail direction.

[0013] In a vibration damping mechanism according to one aspect of the present disclosure, the reaction force portion includes a buffer material on the impact surface.

[0014] An apparatus according to one aspect of the present disclosure includes the vibration damping mechanism and the rack. [Effects of the Invention]

[0015] According to the above aspect, the vibration damping mechanism can be easily mounted in the rack. [Brief explanation of the drawings]

[0016] [Figure 1] FIG. 2 is a front view of the device according to the first embodiment. [Figure 2] 2 is a horizontal cross-sectional view of the device according to the first embodiment taken along line II-II in FIG. 1. FIG. [Figure 3] 5A to 5C are diagrams illustrating the operation of the vibration damping mechanism according to the first embodiment. [Figure 4] FIG. 10 is a plan view of a vibration damping mechanism according to a second embodiment. [Figure 5] 10A to 10C are diagrams illustrating the operation of the vibration damping mechanism according to the second embodiment. [Figure 6] FIG. 10 is a plan view of a vibration damping mechanism according to a third embodiment. [Figure 7] 10A to 10C are diagrams illustrating the operation of the vibration damping mechanism according to the third embodiment. [Figure 8] 1 is a graph showing the time history of the top displacement of the device. [Figure 9] 1 is a graph showing the time history of the top acceleration of the device. [Figure 10] 10 is a graph showing the time history of the displacement of the top of the device and the time history of the acceleration of the moving part. [Figure 11] FIG. 11 is a plan view of a vibration damping mechanism according to another modified example of the third embodiment. [Figure 12] FIG. 10 is a plan view of a vibration damping mechanism according to a fourth embodiment. [Figure 13] FIG. 10 is a horizontal cross-sectional view of a vibration damping mechanism according to a fourth embodiment. [Figure 14] FIG. 14 is a vertical cross-sectional view of the vibration damping mechanism according to the fourth embodiment taken along line XIV-XIV in FIG. [Figure 15] 15 is a vertical cross-sectional view of the vibration damping mechanism according to the fourth embodiment taken along line XV-XV in FIG. 13. FIG. [Figure 16] 10A to 10C are diagrams illustrating the operation of the vibration damping mechanism according to the fourth embodiment. [Figure 17] 10A and 10B are diagrams illustrating another operation of the vibration damping mechanism according to the fourth embodiment. [Figure 18] 10A and 10B are diagrams illustrating the operation of a vibration damping mechanism according to a comparative example. [Figure 19] 10 is a graph showing the relationship between the length of the range of motion and the apex displacement in the first embodiment. [Figure 20]10 is a graph showing the relationship between the total weight of the movable portion and the displacement of the top portion in the second embodiment. [Figure 21] 10 is a graph showing the relationship between the presence or absence of a buffer material and the displacement of the top portion in the third embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0017] Various embodiments according to the present disclosure will be described below with reference to the drawings.

[0018] First Embodiment A first embodiment according to the present disclosure will be described below with reference to FIGS.

[0019] (Overall composition) As shown in FIG. 1, the device 1 includes a vibration control mechanism 2, a computer 3, and a rack 4.

[0020] The rack 4 can accommodate the vibration control mechanism 2 and the computer 3 therein. Hereinafter, the width direction of the rack 4 will also be referred to as the X direction, the depth direction of the rack 4 as the Y direction, and the up-down direction of the rack 4 as the Z direction.

[0021] The rack 4 includes a plurality of shelf boards 43 that divide the rack 4 into a plurality of shelves 41. Each shelf board 43 has a plate surface 43s that is a flat surface along the XY plane. Of the multiple shelves 41 of the rack 4, the vibration control mechanism 2 is provided on the top shelf, and multiple servers as computers 3 are provided on the other shelves.

[0022] (Configuration of vibration suppression mechanism) The vibration suppression mechanism 2 is provided between the top plate 42 of the rack 4 and the top shelf plate 43 in the rack 4. As shown in FIGS. 1 and 2, the vibration damping mechanism 2 includes a plate 21, a reaction force portion 22, and a movable portion .

[0023] The plate 21 has an upper plate surface 21u and a lower plate surface 21d, which are a pair of flat surfaces along the XY plane. The board 21 is placed so that the lower board surface 21d is in contact with the upward-facing board surface 43s of the shelf board 43. The plate 21 is fixed to the plate surface 43s with fixing members 21f such as screws.

[0024] The reaction force portion 22 is fixed to the plate 21 on the upper plate surface 21u side. In this embodiment, the reaction force portion 22 has a cylindrical shape with its axis facing the Z direction.

[0025] The movable portion 23 is capable of sliding on the upper plate surface 21u and of colliding with the reaction portion 22. In this embodiment, the movable part 23 has an annular shape with its axis facing the Z direction, and surrounds the reaction part 22 in the XY plane. When the reaction force portion 22 and the movable portion 23 are coaxially positioned, the vibration damping mechanism 2 has a space 24 between the outer periphery of the reaction force portion 22 and the inner periphery of the movable portion 23, the space 24 corresponding to the range of motion RM.

[0026] (operation) As shown in FIG. 3, assume that an external horizontal force F1 is applied to equipment 1 due to an earthquake or the like. At this time, in response to the horizontal force F1 acting on the device 1, the movable part 23 slides on the upper plate surface 21u of the plate 21 due to inertial force in the direction opposite to the direction in which the horizontal force F1 acts. The movable part 23 sliding in the opposite direction collides with the reaction part 22 and applies a horizontal force F2 to the reaction part 22 in the opposite direction to the horizontal force F1. The horizontal force F2 applied by the movable portion 23 reduces the horizontal force F1 that the device 1 receives via the reaction force portion 22. By repeating such a reduction in the horizontal force F1, the horizontal force F1 can be steadily reduced during an earthquake, for example.

[0027] (Action and effect) According to this embodiment, the vibration damping mechanism 2 has a structure in which the plate 21 on which the movable part 23 slides is in contact with the plate surface 43s of the shelf board 43, so that the thickness of the entire vibration damping mechanism 2 is reduced. Therefore, even if the internal space of the rack 4 is thinly partitioned by the shelf board 43, the vibration suppression mechanism 2 can be provided inside the rack 4. Therefore, the vibration suppression mechanism 2 can be easily mounted inside the rack 4. On the other hand, when vibrations are applied to the equipment 1 due to an earthquake or the like, the movable part 23 collides with the reaction part 22 due to inertial force, and the vibration control mechanism 2 can reduce the horizontal force applied to the equipment 1.

[0028] According to this embodiment, the reaction part 22 has a cylindrical shape, and the movable part 23 has a circular ring shape. As a result, compared to a shape having corners, the reaction force part 22 and the movable part 23 always collide at one point against vibrations that are not unidirectional, such as earthquakes, so that the force acts effectively without being dispersed. Therefore, the vibration control mechanism 2 can easily reduce the horizontal force applied to the device 1.

[0029] (Variation) In this embodiment, the reaction force portion 22 has a cylindrical shape and the movable portion 23 has a circular ring shape, but any shape may be used as long as it can reduce the horizontal force. As a modification, the reaction part 22 may have a prismatic shape, and the movable part 23 may have a rectangular ring shape.

[0030] Second Embodiment Hereinafter, a second embodiment according to the present disclosure will be described with reference to FIGS. The vibration suppression mechanism 102 of this embodiment is similar to the vibration suppression mechanism 2 of the first embodiment, except for the points described below.

[0031] (Configuration of vibration suppression mechanism) A vibration suppression mechanism 102 of this embodiment is provided in the device 1 in place of the vibration suppression mechanism 2 of the first embodiment. As shown in FIG. 4, the vibration suppression mechanism 102 includes a plate 21, a reaction force portion 122, and a movable portion 123. The vibration damping mechanism 102 is mounted in the rack 4 in the same manner as the vibration damping mechanism 2 of the first embodiment.

[0032] The reaction force portion 122 is fixed to the plate 21 on the upper plate surface 21u side. In this embodiment, the reaction force part 122 has an annular shape with its axis facing the Z direction, and surrounds the movable part 123 in the XY plane.

[0033] The movable portion 123 is capable of sliding on the upper plate surface 21u and of colliding with the reaction portion 122. In this embodiment, the movable part 123 has a cylindrical shape with its axis facing the Z direction. When the reaction force portion 122 and the movable portion 123 are coaxially positioned, the vibration damping mechanism 102 has a space 124 between the inner periphery of the reaction force portion 122 and the outer periphery of the movable portion 123, the space 124 corresponding to the range of motion RM.

[0034] (operation) As shown in FIG. 5, assume that an external horizontal force F1 is applied to equipment 1 due to an earthquake or the like. At this time, in response to the horizontal force F1 acting on the device 1, the movable part 123 slides on the upper plate surface 21u of the plate 21 due to inertial force in the direction opposite to the direction in which the horizontal force F1 acts. The movable part 123 sliding in the opposite direction collides with the reaction part 122 and applies a horizontal force F2 to the reaction part 122 in the opposite direction to the horizontal force F1. The horizontal force F2 from the movable portion 123 reduces the horizontal force F1 that the device 1 receives via the reaction force portion 122.

[0035] (Action and effect) According to this embodiment, the vibration suppression mechanism 102 has a structure in which the plate 21 on which the movable part 123 slides is in contact with the plate surface 43s of the shelf board 43, so that the thickness of the entire vibration suppression mechanism 102 is reduced. Therefore, even if the internal space of the rack 4 is thinly partitioned by the shelf board 43, the vibration suppression mechanism 102 can be provided inside the rack 4. Therefore, the vibration suppression mechanism 102 can be easily mounted inside the rack. On the other hand, when vibrations are applied to the device 1 due to an earthquake or the like, the movable part 123 collides with the reaction part 122 due to inertial force, and the vibration suppression mechanism 102 can reduce the horizontal force applied to the device 1.

[0036] According to this embodiment, the reaction force portion 122 has a circular ring shape, and the movable portion 123 has a cylindrical shape. As a result, compared to a shape having corners, the reaction force part 122 and the movable part 123 always collide at one point against vibrations that are not unidirectional, such as earthquakes, so that the force acts effectively without being dispersed. Therefore, the vibration suppression mechanism 102 can easily reduce the horizontal force applied to the device 1.

[0037] (Variation) In this embodiment, the reaction force portion 122 has a circular ring shape and the movable portion 123 has a cylindrical shape, but any shape may be used as long as it can reduce the horizontal force. As a modification, the reaction force portion 122 may have a rectangular ring shape, and the movable portion 123 may have a rectangular column shape.

[0038] Third Embodiment Hereinafter, a third embodiment according to the present disclosure will be described with reference to FIGS. The vibration suppression mechanism 202 of this embodiment is similar to the vibration suppression mechanism 2 of the first embodiment, except for the points described below.

[0039] (Configuration of vibration suppression mechanism) A vibration suppression mechanism 202 of this embodiment is provided in the device 1 in place of the vibration suppression mechanism 2 of the first embodiment. As shown in FIG. 6, the vibration suppression mechanism 202 includes a rail unit 221, a reaction force portion 222, and a movable portion 223. The vibration damping mechanism 202 is mounted in the rack 4 in the same manner as the vibration damping mechanism 2 of the first embodiment.

[0040] The rail unit 221 includes a plurality of rails 226 . The rail unit 221 has a lower surface 221d, and is placed so that the lower surface 221d contacts the plate surface 43s of the shelf board 43. In this embodiment, the rails 226 each extend in the X direction and are aligned in the Y direction in a position extending in the X direction. The rail unit 221 also includes a bottom plate 221b, which has a lower surface 221d.

[0041] The reaction force portion 222 is provided on each rail 226 and fixed to each rail 226 . The reaction section 222 has a pair of reaction bodies 227 spaced apart in the direction in which each rail 226 extends, and can be fixed at any position in the direction in which each rail 226 extends by using holes 228 provided at a predetermined pitch in the bottom plate 221b. The pair of reaction bodies 227 sandwich the movable part 223 therebetween. Each reaction body 227 has a shock absorber 229 on a collision surface 227 s facing the movable part 223 , which absorbs the impact when the reaction body 227 collides with the movable part 223 .

[0042] The movable portion 223 is provided on each rail 226 . The movable portion 223 is capable of sliding on each rail 226 and colliding with each reaction body 227 . With the movable part 223 positioned at the center between the pair of reaction bodies 227, the vibration damping mechanism 202 has a gap 230 between each reaction body 227 and the movable part 223, the gap 230 corresponding to the range of motion RM.

[0043] (operation) As shown in FIG. 7, assume that an external horizontal force F1 is applied to equipment 1 due to an earthquake or the like. At this time, in response to the horizontal force F1 acting on the device 1, each movable part 223 slides on each rail 226 due to inertial force in the direction opposite to the direction in which the horizontal force F1 acts. Each movable portion 223 sliding in the opposite direction collides with one of the reaction bodies 227, and applies a horizontal force F2 to the reaction body 227 in the direction opposite to the horizontal force F1. The horizontal force F2 applied by each movable portion 223 reduces the horizontal force F1 received by the device 1 via the reaction body 227.

[0044] (Action and effect) According to this embodiment, the vibration suppression mechanism 202 has a structure in which the lower surface 221d of the rail unit 221 on which the movable part 223 slides is in contact with the plate surface 43s of the shelf board 43, so that the thickness of the entire vibration suppression mechanism 202 is reduced. Therefore, even if the internal space of the rack 4 is thinly partitioned by the shelf board 43, the vibration suppression mechanism 202 can be provided inside the rack 4. Therefore, the vibration suppression mechanism 202 can be easily mounted inside the rack. On the other hand, when vibrations are applied to the equipment 1 due to an earthquake or the like, the vibration control mechanism 202 can reduce the horizontal force applied to the equipment 1 by repeatedly colliding each movable part 223 with the pair of reaction bodies 227 due to inertial force.

[0045] According to one example of this embodiment, as shown in Figures 8 and 9, when the vibration damping mechanism 202 is provided on the rack 4 (when vibration is damped), the top displacement and top acceleration of the rack 4 can be attenuated to less than half the amount when the vibration damping mechanism 202 is not provided on the rack 4 (when vibration is not damped). As shown in FIG. 10, when the vibration damping mechanism 202 is provided on the rack 4 (when vibration is damped), acceleration occurs in the movable part 223 at the moment when the movable part 223 collides with the reaction body 227, and the collision of the movable part 223 enables the movable part 223 to reduce the maximum displacement portion in the displacement waveform of the top of the rack 4.

[0046] (Variation) In this embodiment, the vibration suppression mechanism 202 includes a plurality of rails 226, but may have any configuration as long as it includes the reaction force portion 222 and the movable portion 223. As a modified example, the rails 226 may each extend in the Y direction and be aligned in the X direction in a position extending in the Y direction. As another variation, as shown in FIG. 11, the plurality of rails 226 may include a first rail 231 extending in the X direction as a first rail direction DL1, and a second rail 232 extending in a second rail direction DL2 that intersects with the first rail direction DL1. According to this modification, the vibration suppression mechanism 202 can reduce the horizontal force acting on the device 1 in two directions, the X direction and the Y direction.

[0047] <Fourth embodiment> Hereinafter, a fourth embodiment according to the present disclosure will be described with reference to FIGS. The vibration suppression mechanism 302 of this embodiment is similar to the vibration suppression mechanism 2 of the first embodiment, except for the points described below.

[0048] (Configuration of vibration suppression mechanism) A vibration suppression mechanism 302 of this embodiment is provided in the device 1 in place of the vibration suppression mechanism 2 of the first embodiment. As shown in FIG. 12, the vibration suppression mechanism 302 includes a housing 309 and a movable part 323 . In this embodiment, the housing 309 has a hollow rectangular parallelepiped shape and contains the movable part 323 therein. The bottom of the housing 309 functions as a plate 321 , and the sidewall of the housing 309 functions as a reaction portion 322 . The vibration damping mechanism 302 is mounted in the rack 4 in the same manner as the vibration damping mechanism 2 of the first embodiment.

[0049] As shown in FIGS. 13 to 15, the plate 321 has an upper plate surface 321u and a lower plate surface 321d that are a pair of plate surfaces along the XY plane. The plate 321 is placed so that the lower plate surface 321d is in contact with the upward-facing plate surface 43s of the shelf board 43. The plate 321 is fixed to the plate surface 43s.

[0050] As the housing 309, the reaction force portion 322 is integrally formed with the plate 321, and is therefore fixed to the plate 321 on the side of the upper plate surface 321u. In this embodiment, the reaction force portion 322 has a rectangular frame shape with the frame height in the Z direction.

[0051] The movable portion 323 includes an outer member 361 and an inner member 362 .

[0052] The external member 361 is capable of sliding on the upper plate surface 321u of the plate 321 and is capable of colliding with the reaction force portion 322. The bottom 361b of the external member 361 has a flat plate shape and is in contact with the upper plate surface 321u of the plate 321 over its entirety. The outer member 361 has a hollow rectangular parallelepiped shape and contains the inner member 362 therein. The external member 361 has an outer dimension in the Y direction that is approximately the same as the inner dimension of the reaction force portion 322, and an outer dimension in the X direction that is smaller than the inner dimension of the reaction force portion 322. With such dimensions, when the external member 361 is located at the center of the reaction force portion 322 in the XY plane, the external member 361 contacts each of a pair of side inner walls 322x extending in the X direction of the reaction force portion 322. In this case, the vibration damping mechanism 302 has a gap 371 corresponding to the range of motion RM1 between the external member 361 and each of a pair of side inner walls 322y extending in the Y direction of the reaction force portion 322. With this structure, the external member 361 is capable of sliding relative to the reaction force portion 322 in the X direction as a first guide direction DG1, and is restricted from sliding relative to the reaction force portion 322 in the Y direction as a second guide direction DG2 that intersects with the first guide direction DG1.

[0053] The internal member 362 is slidable on an upper surface 361u of a bottom 361b of the external member 361 and is capable of colliding with the external member 361. The bottom 362b of the internal member 362 has a flat shape and is in contact with the upper surface 361u of the bottom 361b of the external member 361 over its entirety. The inner member 362 has a rectangular parallelepiped shape. The internal member 362 has an outer dimension in the X direction that is approximately the same as the inner dimension of the external member 361, and an outer dimension in the Y direction that is smaller than the inner dimension of the external member 361. With such dimensions, when the internal member 362 is at the center of the external member 361 in the XY plane, it has a gap 372 corresponding to the movable range RM2 between it and a pair of side inner walls 361x extending in the X direction of the external member 361, and is in contact with a pair of side inner walls 361y extending in the Y direction of the movable part 323. With this structure, the internal member 362 is able to slide relative to the external member 361 in the second guide direction DG2, but is restricted from sliding relative to the external member 361 in the first guide direction DG1.

[0054] (operation) For example, suppose that an external horizontal force Fy1 in the Y direction is applied to equipment 1 due to an earthquake or the like. At this time, as shown in Figure 16, the internal member 362 of the movable part 323 slides within the external member 361 and collides with the external member 361 due to inertial force, applying a horizontal force Fy2 in the opposite direction to the horizontal force Fy1 to the reaction force part 322 via the external member 361. The horizontal force Fy2 applied by the movable portion 323 reduces the horizontal force Fy1 that the device 1 receives via the reaction force portion 322.

[0055] Similarly, suppose that an earthquake or the like causes a horizontal force Fxy1 to act on the device 1 from the outside, tilting it in the X and Y directions. At this time, as shown in FIG. 17, the internal member 362 of the movable part 323 slides within the external member 361 and collides with the external member 361 due to inertial force, while the external member 361 of the movable part 323 slides on the plate 321, and the movable part 323 applies a horizontal force Fxy2 to the reaction force part 322 in the direction opposite to the horizontal force Fxy1. The horizontal force Fxy2 applied by the movable portion 323 reduces the horizontal force Fxy1 that the device 1 receives via the reaction force portion 322.

[0056] (Action and effect) According to this embodiment, the vibration suppression mechanism 302 has a structure in which the plate 321 on which the movable part 323 slides is in contact with the plate surface 43s of the shelf board 43, so that the thickness of the entire vibration suppression mechanism 302 is reduced. Therefore, even if the internal space of the rack 4 is thinly partitioned by the shelf board 43, the vibration suppression mechanism 302 can be provided inside the rack 4. Therefore, the vibration suppression mechanism 302 can be easily mounted inside the rack.

[0057] On the other hand, when the equipment 1 is subjected to vibrations due to an earthquake or the like, the movable part 323 collides internally due to inertial force, and by colliding with the reaction part 322, the vibration control mechanism 302 can reduce the horizontal force applied to the equipment 1.

[0058] Furthermore, according to the vibration suppression mechanism 302 of this embodiment, the internal member 362 is less likely to vibrate in the horizontal plane relative to the reaction force portion 322. Therefore, each component of the movable portion 323 can be made to collide with the surface in each direction in the horizontal plane. 18, in a case where the vibration damping mechanism does not include an external member, the internal member 362 moves freely within the movable range relative to the reaction force portion 322, and the internal member 362 may sway and tilt relative to the reaction force portion 322 in the XY plane. When tilted in this way, the horizontal force that the internal member 362 imparts to the reaction force portion 322 in response to the horizontal force Fy1 in the Y direction applied to the equipment is dispersed into a horizontal force Fy2 in the Y direction and a horizontal force Fx2 in the X direction, making it difficult to reduce the horizontal force Fy1 applied to the equipment. In contrast, according to the vibration suppression mechanism 302 of this embodiment, the external member 361 makes it difficult for the internal member 362 to vibrate in the horizontal plane relative to the reaction force portion 322, so that the horizontal force Fy1 applied to the device 1 is likely to be reduced.

[0059] (Variation) In this embodiment, the vibration damping mechanism 302 has the first guide direction DG1 in the X direction and the second guide direction DG2 in the Y direction, but may be configured in any way as long as the first guide direction DG1 and the second guide direction DG2 are different horizontal directions. In other words, the vibration damping mechanism 302 may be configured in any way as long as the external member 361 and the internal member 362 can slide in different horizontal directions. As a modified example, the external member 361 may be able to slide relative to the reaction force portion 322 in the Y direction, but may be restricted from sliding relative to the reaction force portion 322 in the X direction. In this case, the internal member 362 may be able to slide relative to the external member 361 in the X direction, but may be restricted from sliding relative to the external member 361 in the Y direction.

[0060] <Other variations> In each of the above-described embodiments, the vibration control mechanism is provided on the uppermost shelf of the plurality of shelves 41 of the rack 4, but it may be provided at any position within the rack 4. As a modified example, the vibration damping mechanism may be provided on any vacant shelf among the plurality of shelves 41 of the rack 4.

[0061] In each of the above-described embodiments, the vibration suppression mechanism is fixed to the plate surface 43s of the shelf board 43 of the rack 4, but it may be configured in any way as long as it is placed in contact with the plate surface 43s. As a modified example, the vibration damping mechanism need not be fixed to the plate surface 43s with screws or the like, but may simply be placed on the plate surface 43s. This configuration eliminates the need for a special mounting jig for mounting the vibration damping mechanism, and the vibration damping mechanism can be easily mounted on an existing rack. However, even with this configuration, frictional force acts between the vibration damping mechanism and the plate surface 43s due to the weight of the vibration damping mechanism, so the vibration damping mechanism can still exert its vibration damping function.

[0062] In each of the above-described embodiments, the rack 4 is provided with servers, but any type of computer 3 may be used. As a modification, the rack 4 may be provided with clients or communication devices as the computers 3 . As another modification, the rack 4 may be provided with communication devices as the computers 3. In this case, the communication devices may include routers, switches, hubs, multiplex transmission devices, and the like.

[0063] In each of the above-described embodiments, the length of the range of motion RM of the vibration damping mechanism may be any length as long as it can damp the vibration of the device 1.

[0064] In each of the above-described embodiments, the weight of the movable part provided in the vibration damping mechanism may be any weight as long as it can damp the vibration of the device 1.

[0065] In the third embodiment, each reaction body 227 is provided with a cushioning material 229 on the collision surface 227s, but as a modification, in other embodiments, the reaction body may be provided with a cushioning material on the collision surface. Conversely, as another modification, in the third embodiment, each reaction body 227 may not have the buffer material 229 on the collision surface 227s.

[0066] Although the embodiment of the present disclosure has been described above, this embodiment is shown as an example and is not intended to limit the scope of the present disclosure. This embodiment can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the present disclosure. [Example]

[0067] The present disclosure will be described in more detail below with reference to examples, but the present disclosure is not limited to the following examples. An embodiment of the vibration suppression mechanism will be described with reference to FIGS.

[0068] (First Example) As a first example, FIG. 19 shows the influence on the top displacement when the length of the range of motion RM in the vibration suppression mechanism 202 of the third embodiment is 5 mm, 10 mm, 15 mm, 20 mm, 30 mm, and 45 mm. The total weight of the movable parts 223 is set to 5.10% of the weight of the rack 4 (three movable parts 223), and the buffer material 229 is made of high-damping rubber. 19, the maximum displacement portion (positive and negative) in the top displacement waveform of the rack 4 was reduced by up to 58% compared to when vibration was not damped when the length of the movable range RM was 10 mm. Furthermore, if the length of the movable range RM was too long, no collision of the movable part 223 occurred and no reduction effect was obtained, whereas if it was too short, the collision force became smaller and the reduction effect was reduced.

[0069] (Second Example) As a second example, Figure 20 shows the effect on the top displacement of rack 4 when the total weight of the movable parts 223 in the vibration damping mechanism 202 of the third embodiment is 5.10% (3 movable parts 223), 3.40% (2 movable parts 223), and 1.70% (1 movable part 223) of the weight of rack 4. The length of the movable range RM was set to 20 mm, and the buffer material 229 was made of high-damping rubber. As shown in Figure 20, when the total weight of the movable part 223 was 5.10% of the weight of rack 4, the maximum displacement portion in the top displacement waveform of rack 4 was reduced by up to 40% compared to when vibration control was not performed. The heavier the weight of the movable part 223, the greater the reduction effect, but there was no difference in reduction effect between 5.10% and 3.40%. Therefore, by using a movable part that accounts for approximately 5% of the total weight, it was confirmed that the maximum displacement portion in the top displacement waveform of rack 4 can be reduced by approximately 30% to 40% compared to when vibration control was not performed. Note that because a collision begins when the top displacement of rack 4 exceeds the length of the range of motion RM, the reduction effect of the main displacement portion (positive and negative) in the top displacement waveform of rack 4 is greater than the reduction effect of the maximum displacement portion in the top displacement waveform of rack 4, and it was confirmed that the main displacement portion can be reduced by approximately 60% compared to when vibration control was not performed.

[0070] (Third Example) As a third example, FIG. 21 shows the influence of the buffer material 229 of the movable part 223 in the vibration damping mechanism 202 of the third embodiment. The total weight of the movable parts 223 was set to 5.10% of the weight of the rack 4 (three movable parts 223), the length of the movable range RM was set to 20 mm, and the buffer material 229 was made of high-damping rubber. 21, the maximum displacement portion (positive and negative) in the top displacement waveform of the rack 4 was reduced by approximately 40% compared to when vibration was not damped, regardless of the presence or absence of the buffer material 229. Therefore, the presence or absence of the buffer material 229 had almost no effect on the vibration control of the equipment 1. [Explanation of symbols]

[0071] 1 equipment 2. Vibration control mechanism 3. Computer 4 racks 21 board 21d Lower plate surface 21f Fixing member 21u upper plate surface 22 Reaction section 23 Moving parts 24 Space 41 Shelf 42 Top plate 43 Shelf 43s board surface 102 Vibration control mechanism 122 Reaction section 123 Moving parts 124 Space 202 Vibration control mechanism 221 Rail Unit 221b Bottom plate 221d Bottom surface 222 Reaction section 223 Moving parts 226 Rail 227 Reaction Body 227s collision surface 228 holes 229 Cushioning material 230 Gap 231 First Rail 232 Second Rail 302 Vibration control mechanism 309 Case 321 board 321d Lower plate surface 321u upper plate surface 322 Reaction section 322x side inner wall 322y side inner wall 323 Moving parts 361 External components 361b bottom 361u top 361x side inner wall 361y side inner wall 362 Internal parts 362b bottom 371 Gap 372 Gap DG1 First guide direction DG2 Second guide direction DL1 First rail direction DL2 Second rail direction F1 horizontal force F2 horizontal force Fx2 horizontal force Fxy1 horizontal force Fxy2 horizontal force Fy1 Horizontal force Fy2 horizontal force RM range of motion RM1 movable area RM2 movable area

Claims

1. a rail unit including a plurality of rails and having a lower surface, the lower surface of which is placed in contact with a surface of a shelf board in a rack capable of mounting a computer; a reaction portion fixed to each of the rails; a movable portion that is slidable on each of the rails and that is capable of colliding with the reaction portion; Vibration control mechanism.

2. 2. The vibration damping mechanism according to claim 1, wherein the reaction portion comprises a pair of reaction bodies spaced apart from each other in the direction in which the rails extend.

3. The plurality of rails are: a first rail extending in a first rail direction; a second rail extending in a second rail direction intersecting the first rail direction; The vibration damping mechanism according to claim 1 or 2.

4. The vibration damping mechanism according to claim 1 , wherein the reaction force portion includes a cushioning material on a collision surface.

5. The vibration damping mechanism according to any one of claims 1 to 4; The rack device.

Images