JP2013234701A - Hysteretic damper and cabinet rack using the same - Google Patents

Abstract

A hysteresis damper capable of absorbing vibration energy caused by an earthquake while maintaining an interval between dampers and facilitating the return of the cabinet rack without damaging the shape of the applied cabinet rack, and a cabinet rack using the hysteresis damper I will provide a.
A hysteresis damper 50 disposed between opposing surfaces of a beam member 22A, one end of which is joined to a support column which is a rigid body, includes a pair of base portions 51 respectively connected to the opposing surfaces of the beam member 22A, Both ends are connected to both bases 51 to hold a distance between the bases, and an external force applied to the beam member by connecting both ends to the opposing surfaces of both bases that are smaller than the distance between the two gap holding parts. And an elastically plastically deformable damper portion 53 that absorbs vibration energy due to relative displacement of the base portion 51 that occurs during operation.
[Selection] Figure 4

Description

  The present invention relates to a hysteresis damper that absorbs vibration energy and a cabinet rack using the hysteresis damper.

  In general, cabinet racks for storing electronic devices such as servers store important and enormous data, and therefore are required to have earthquake resistance in terms of safety. Also, cabinet racks for storing arts and crafts are required to be seismic for safety in order to protect valuable arts and crafts.

  As conventional seismic structures in this type of cabinet rack, there are known a seismic isolation structure that imparts a seismic structure to the cabinet rack itself and a seismic isolation structure that is installed on the floor surface and suppresses vibrations acting on the cabinet rack. There is also known a seismic control structure in which an elastic-plastic damper that absorbs vibration energy is attached to a part of structural members such as buildings.

  The cabinet rack itself has an anti-seismic structure with reinforcing brackets that reinforce the corners of the horizontal and vertical frames of the rack body, and are fixed to the horizontal bracket and the vertical frame. An earthquake-resistant structure in which a vertical portion and a bracing portion extending at the intersection of the horizontal portion and the vertical portion are integrally provided, and a rib that engages with the bracing portion from the vertical direction is formed on the longitudinal edge of the vertical frame. It is known (see, for example, Patent Document 1).

  Further, as the seismic isolation structure, in the seismic isolation device in which the seismic isolation unit including the lower support member and the upper support member that is movably attached to the lower support member and on which the cabinet rack is placed is disposed, A container provided along the moving direction of the support member, a viscous body accommodated in the container, a resistance plate that generates a damping force by moving in the viscous body, and a connection for connecting the resistance plate to the upper support member And a means having a structure are known (for example, see Patent Document 2). According to the one described in Patent Document 2, when the floor vibrates, the lower support member and the container are shaken, but the resistance plate connected to the upper support member moves in contact with the viscous body, and the resistance plate A damping force is generated, the movement of the upper support member is suppressed by this damping force, and the vibration acting on the cabinet rack can be suppressed.

  In addition, as a structure for assembling an elasto-plastic damper to a structural component of a building, the left and right sides of the U-shaped elasto-plastic damper disposed between the left and right (or upper and lower) restraints joined to the rigid body Along the (or up or down) restraint, the tip of the opposite side is connected to the left or right (or up or down) restraint with the curved part positioned up or down (or left or right). Damping structures are known (see, for example, Patent Document 3). It is conceivable to apply the technique of Patent Document 3 to a cabinet rack.

JP 2008-177189 A (Claims, FIGS. 1 to 3) JP 2008-190560 A (Claims, FIGS. 1 and 2) JP 2009-270336 A (Claims, FIGS. 3 and 4)

  However, in the structure described in Patent Document 1, since the cabinet rack itself has a seismic structure, the rigidity of the cabinet rack itself with respect to vibration can be increased, but there is a concern that the cabinet rack may fall down due to large vibration. There is. Therefore, strength is required for the installation of the cabinet rack with respect to the floor surface, and a reinforcing member for preventing the overturn is required for that purpose, which requires time and labor for installation of the cabinet rack and limits the degree of freedom of installation.

  Further, the structure described in Patent Document 2 has a problem that the mechanism is complicated and the cost is high, and the installation location of the cabinet rack is limited.

  By applying the structure described in Patent Document 3 to a cabinet rack, the cabinet rack itself can be provided with an elastic-plastic damper having a vibration control function. However, in the structure described in Patent Document 3, since the curvature of the curved portion of the U-shaped elastic-plastic damper is reduced due to the occurrence of an earthquake and the vibration energy is absorbed, the distance between the opposing side portions of the elastic-plastic damper due to the earthquake, that is, There is a concern that the spacing between the restraining portions where the dampers are disposed cannot be maintained, and the opposing side portions cannot move in parallel, so that the vibration energy absorption performance (seismic performance) of the elastic-plastic damper cannot be maintained. In addition, since the interval between the restraining portions where the dampers are arranged cannot be maintained, there is a concern that the cabinet rack is deformed and the shape is lost, and the cabinet rack cannot be restored to the original shape.

  The present invention has been made in view of the above circumstances, and can absorb vibration energy due to an earthquake while maintaining a distance between dampers, and can easily return the cabinet rack without damaging the shape of the applied cabinet rack. It is an object of the present invention to provide a history damper and a cabinet rack using the history damper.

  In order to achieve the above object, the hysteresis damper according to the present invention is a hysteresis damper disposed between opposing surfaces of the other end of the rigid member each having one end joined to a rigid body, and is disposed on the opposing surfaces of the both rigid members. A pair of base portions connected to each other, a pair of interval holding portions whose both ends are connected to the both base portions to hold the interval between the base portions, and opposing surfaces of the both base portions smaller than the interval between the both interval holding portions And a damper part that is elastically plastically deformable to absorb vibration energy due to the relative displacement of the base part that is generated when an external force is applied to the rigid member.

  By configuring in this way, when both bases are displaced relative to each other when an external force is applied to the rigid member due to the occurrence of an earthquake, the damper part and the distance holding part are bent with the same deformation amount, but compared to the damper part. Since the distance of the interval holding portion is long, it is possible to prevent the interval holding portion from being broken before the damper portion. Thereby, a damper part can absorb a vibration energy in the state where the space | interval of the base part was maintained.

  In the hysteresis damper according to the present invention, it is preferable that a portion of the base portion that extends outward from the gap holding portion is formed so as to be connectable to the opposing surface of the rigid member.

  By comprising in this way, the connection to the opposing surface of the rigid member which is an installation object of a hysteresis damper can be made easy.

  In the hysteresis damper of the present invention, it is preferable that the damper portion is formed in a curved surface shape having the same curvature. Here, the curved surface shape having the same curvature includes both a wave shape and an arc shape.

  By configuring in this way, it is possible to make the plastic deformation of the damper part uniform with respect to the relative displacement (movement) of both base parts that occurs when an external force is applied to the rigid member.

  Further, in the history damper of the present invention, a plurality of the damper portions may be provided in parallel with each other (claim 4).

  By comprising in this way, the absorption efficiency of the vibration energy by a damper part can further be improved.

  In addition, it is preferable that the hysteresis damper of the present invention is formed of an aluminum extruded shape (claim 5).

  With such a configuration, it is easy to manufacture a hysteresis damper with high dimensional accuracy, and the weight can be reduced, and further, recycling is possible, so that resources can be effectively used.

  The cabinet rack according to the present invention includes four struts that are opposed to each other, a rigid beam member that is joined to the upper and lower portions of the strut directly or via a rigid member, and a bridge between the struts. And a shelf rack for placing a placement object, wherein the beam member is divided into two members, and between the divided two opposing surfaces, any one of claims 1 to 5 The hysteresis damper according to claim 1 is disposed and connected to the facing surface (claim 6).

  With this configuration, when an earthquake occurs, the damper portion can absorb vibration energy in a state where the distance between the base portions is maintained in the history damper. Therefore, since the shape of the cabinet rack is not impaired, the history damper can be replaced.

  In the cabinet rack using the hysteresis damper according to the present invention, the beam members are arranged in parallel with each other at the upper and lower portions of the four columns, and are arranged in parallel to each other; Preferably, the first beam member is composed of two second beam members which are formed in a short length with respect to the first beam member and are joined to the first beam members and are parallel to each other.

  By comprising in this way, while being able to raise the intensity | strength (rigidity) of the whole cabinet rack, the absorption capability (damping performance) of the vibration energy in each beam member can be improved.

  Further, in the cabinet rack using the hysteresis damper of the present invention, the beam member is formed of an aluminum extruded shape, and an insertion fixing portion of a connecting member for connecting the hysteresis damper is formed in a longitudinal direction. (Claim 8).

  With this configuration, it is possible to easily manufacture a beam member having a hysteresis damper connecting portion, and to easily connect the beam member and the hysteresis damper.

  According to this invention, since it is configured as described above, the following remarkable effects can be obtained.

  (1) According to invention of Claim 1, a damper part can absorb a vibration energy in the state with which the space | interval of a pair of base part connected with the opposing surface of the rigid members of installation object was maintained. Therefore, the vibration control performance can be improved. In addition, since the damper portion can absorb vibration energy in a state in which the distance between the base portions is maintained, when the hysteresis damper is applied to, for example, a cabinet rack, the cabinet rack can be restored without damaging the shape of the cabinet rack. Can be easily.

  (2) According to the invention described in claim 2, in addition to the above (1), the history is further increased by forming the portion extending outside the gap holding portion in the base portion so as to be connectable to the opposing surface of the rigid member. It is possible to facilitate the connection of the rigid member that is the installation target of the damper to the opposing surface.

  (3) According to the invention described in claim 3, by forming the damper portion into a curved surface shape having the same curvature, the damper portion is adapted to the relative displacement (movement) of both base portions that occur when an external force is applied to the rigid member. Since plastic deformation can be made uniform, in addition to the above (1) and (2), the entire damper can be further uniformly plastically deformed to improve vibration energy absorption performance (damping performance).

  (4) According to the invention described in claim 4, in addition to the above (1) to (3), the vibration energy absorption efficiency by the damper portion is provided by providing a plurality of damper portions in parallel with each other. Can be further increased.

  (5) According to the invention described in claim 5, by forming the hysteresis damper with an aluminum extruded profile, it is easy to produce a hysteresis damper with high dimensional accuracy, and the weight can be reduced, and further recycling is possible. It is possible to use resources effectively.

  (6) According to the invention described in claim 6, when the earthquake occurs, in the hysteresis damper, the damper portion can absorb the vibration energy in a state where the distance between the base portions is maintained, so that the shape of the cabinet rack is damaged. The history damper can be replaced. Therefore, the cabinet rack can be easily restored.

  (7) According to the invention described in claim 7, in addition to the above (6), the overall strength (rigidity) of the cabinet rack can be further increased, and vibration energy absorbing performance (damping performance) in each beam member ) Can be increased.

  (8) According to the eighth aspect of the invention, in addition to the above (6) and (7), it is easy to produce a beam member having a hysteresis damper connecting portion, and the beam member and the hysteresis damper are connected. Can be made easier.

It is a schematic front view of the cabinet rack to which the history damper concerning this invention is applied. It is a schematic side view of the said cabinet rack. It is a top view of the said cabinet rack. FIG. 4 is an enlarged plan view (a) and a side view (b) of part I in FIG. 3. It is a disassembled perspective view which shows the attachment state of the log | history damper of 1st Embodiment which concerns on this invention. It is the front view (b) explaining the front view (a) of the said hysteresis damper, and the shape, a dimension, etc. of the said hysteresis damper. It is a front view showing a history damper of a 2nd embodiment concerning this invention. It is an enlarged plan view of the II part of FIG. It is a top view of the support | pillar in this invention. It is an expanded sectional view which shows the attaching part of the support | pillar and cover body in this invention. It is an expanded sectional view which shows the attaching part of the support | pillar and mount rail in this invention. It is an enlarged front view of the III section of FIG. It is a front view of the side beam member in this invention. It is a side view which shows a part of said side beam member in a cross section. It is the front view (a) and back view (b) of the side lower beam member in this invention. It is sectional drawing (b) which follows the IV-IV line | wire of the side view (a) and (a) which shows a part of said side beam member in a cross section. It is the front view (a) and back view (b) of the front and back beam member in this invention. It is the front view (a) which shows the state where the history damper of a 1st embodiment changed, and the front view (b) which shows the state where the history damper of a 2nd embodiment changed. It is a front view which shows the attachment state of the hysteresis damper of 3rd Embodiment and 4th Embodiment which concern on this invention.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated in detail based on an accompanying drawing. Here, the case where the cabinet rack which consists of a rigid body and rigid member which concerns on this invention is applied to electronic devices, such as a server, is demonstrated.

<First Embodiment>
As shown in FIG. 1 to FIG. 3, the cabinet rack 1 is adjacent to four columns 10 having a rectangular cross section adjacent to each other and orthogonal to each other at the upper and lower portions of the columns 10. Two first beam members 21A and 21B that are joined in parallel to each other, and the first beam members 21A and 21B are formed in a short length with respect to the first beam members 21A and 21B. And two parallel beam members 22A and 22B which are joined to each other, and a plurality of shelves 3 for placing an electronic device 2 such as a server, for example, between the columns 10. Further, hysteresis dampers 50 according to the present invention are attached to intermediate portions of the first beam members 21A and 21B and the second beam members 22A and 22B, respectively. The top plate 5 is attached to the upper surfaces of the upper first beam member 21A and the second beam member 22A, and the lower surfaces of the first beam member 21B and the second beam member 22B on the lower side. A bottom plate 6 is attached.

  In this case, the first beam member 21A in the upper part of the column 10 forms a side upper beam member, and the first beam member 21B in the lower part of the column 10 forms a side lower beam member. Further, the second beam member 22A in the upper part of the support column 10 forms an upper front / rear beam member, and the second beam member 22B in the lower part of the support column 10 forms a lower front / rear beam member.

  As shown in FIGS. 8 and 9, the support column 10 is formed of an extruded aluminum member. As shown in FIGS. 8 and 9, the support column 11 has a hollow rectangular shape and a corner on the inner surface of each side 12 of the support column body 11. Narrow opening-shaped screw pockets 13 each opening toward the adjacent side portion 12 are provided. In addition, an L-shaped hook portion 14 that projects toward the corner side is projected on the corner side of the outer side surface of one side portion 12 located outside the column main body 11. A first attachment hole 15a is provided on the side. A cover body 30 having a U-shaped cross section is attached to the front side and the back side of the column 10 via the hook portion 14 and the attachment hole 15a.

  The cover body 30 is formed of an aluminum extruded profile, and as shown in FIG. 8, an L-shaped cover body 31 having an engagement claw portion 32 engaged with the hook portion 14 at one end, and a cover And a mounting piece 33 that protrudes in a substantially crank shape from a position near the engaging claw portion 32 of the main body 31 and contacts the side portion 12 of the support column 10. The cover body 30 has a through hole 34 provided in the mounting piece 33 in a state where the engaging claw portion 32 is engaged with the hook portion 14 of the column 10 and the mounting piece 33 is in contact with the side portion 12 of the column 10. Are attached to the front side and the back side of the support column 10 (see FIG. 9A). The cover body 30 attached in this way can secure a space for guiding the wiring of the electric cords of the electronic device 2 such as a server mounted on the cabinet rack 1.

  Moreover, the 2nd attachment hole 15b is provided in the upper and lower two places of the inner side part 12 adjacent to the side part 12 of the front side and back side of the support | pillar 10, and this 2nd attachment hole 15b is provided. A mounting rail 40 that supports the shelf board 3 is attached. In this case, the mount rail 40 is formed of an angle material, and through holes 42 are provided at two locations above and below one piece 41, and a plurality of through holes 44 are provided in the other piece 43 with appropriate intervals. Is provided. The mount rail 40 formed in this manner is formed by screwing a mounting screw 45 penetrating through a through hole 42 provided in one piece 41 to a second mounting hole 15b provided in the column 10, thereby (See FIG. 9B). In this state, a support pin (not shown) for supporting the shelf plate 3 is inserted into an arbitrary through hole 44 provided in the other piece 43, and the shelf plate 3 is placed on the support pin to place the shelf in the cabinet 1. The board 3 is arranged.

  The first beam member 21A forming the side upper beam member is formed of an aluminum extruded profile, and as shown in FIGS. 10 to 12, a hollow rectangular main body 23a and an upper side portion of the main body 23a The upper screw pockets 27a, which are two insertion fixing portions having narrow openings that open outward at both ends of the inner surface of the inner surface 24a, and inward (upward) on both sides of the intermediate portion of the inner surface of the lower side 25a of the main body 23a The lower screw pocket 27c, which is two insertion and fixing portions having a narrow opening opening toward the upper side), one of the upper screw pockets 27a, and the corner opposite to the corner where the one upper screw pocket 27a is located. And a reinforcing inclined rib 28a connected to the portion.

  In addition, through holes 61 through which fixing bolts 60 for fixing the first beam member 21A to the column 10 can be penetrated are provided at four locations on the lower side 25a on both ends in the longitudinal direction of the main body 23a. A fixing bolt 60 penetrating the hole 61 is screwed to the screw pocket 13 provided in the column 10 (see FIG. 3). Further, four joint bolts 62 for joining the first beam member 21A and the second beam member 22A pass through the attachment position of the second beam member 22A on one side portion 26 of the main body 23a. Four through holes 63 are provided. A joining bolt 62 penetrating these through holes 63 is screwed to a screw pocket 13 which is an insertion fixing portion provided in a second beam member 22A described later.

  On the other hand, the first beam member 21B forming the side lower beam member is formed of an aluminum extruded profile, and as shown in FIGS. 13 and 14, the hollow rectangular main body 23b and the main body 23b Upper screw pockets 27b, which are two narrow insertion openings that open inward (downward) on both sides of the middle part of the upper side part 24b, and outside both ends of the inner surface of the lower side part 25b of the main body 23b. The lower screw pocket 27d, which is two insertion fixing portions having a narrow opening opening toward the direction, one of the lower screw pockets 27d, and a corner angle facing the corner portion where the one lower screw pocket 27d is located And a reinforcing inclined rib 28b connected to the portion.

  Further, as shown in FIG. 14B, the upper side 24b of the main body 23b at one end in the longitudinal direction of the first beam member 21B, one side part 26a adjacent to one end of the upper side 24b, and the reinforcing inclination A notch 64 is provided over a part of the rib 28 b, and the lower end of the support column 10 is inserted into the notch 64. In addition, a through hole 66 through which a fixing bolt 65 for fixing to the floor surface 4 on which the first beam member 21B is installed is provided in the lower side portion 25b of the cutout portion 64 of the main body 23b.

  Further, four joint bolts 62 for joining the first beam member 21B and the second beam member 22 penetrate through the attachment position of the second beam member 22 on the other side portion 26b of the main body 23b. Four through holes 63 are provided. A joining bolt 62 penetrating these through holes 63 is screwed to a screw pocket 13 which is an insertion fixing portion provided in a second beam member 22 described later.

  The first beam members 21A and 21B configured as described above are formed by two divided members, and a hysteresis damper 50, which will be described later, is disposed between the two members facing each other.

  On the other hand, the second beam members 22A, 22B forming the upper and lower front / back beam members are formed of an aluminum extruded profile, and the second beam members 22A forming the upper front / back beam members. As shown in FIGS. 5 and 15, as shown in FIG. 5 and FIG. 15, a narrow rectangular opening that opens inward (downward) on both sides of a hollow rectangular main body 23c and an intermediate portion of the upper side 24c of the main body 23c. The upper screw pocket 27e which is two insertion fixing portions of the main body 23c, and the lower screw pocket 27f which is two insertion fixing portions having narrow openings that open outward at both ends of the inner surface of the lower side portion 25c of the main body 23c. And a reinforcing inclined rib 28c connected to one corner of the lower screw pocket 27f and a corner opposite to the corner where the one lower screw pocket 27f is located.

  The first beam members 21A and 21B and the second beam members 22A and 22B are each divided into two members, and a hysteresis damper 50 is disposed between the opposed surfaces of the divided two members.

  Next, the hysteresis damper 50 will be described as a representative of the hysteresis damper 50 disposed between the opposed surfaces of the divided two members of the second beam member 22A forming the upper front / back beam member.

  The hysteresis damper 20 is formed of an aluminum extruded profile. As shown in FIGS. 4 to 6, the pair of base portions 51 respectively connected to the opposed surfaces of the divided second beam member 22A, Both ends are connected to a pair of interval holding portions 52 that are connected to the base 51 at both ends to hold the interval L1 between the bases 51, and opposite surfaces of both bases that are smaller than the interval L1 between the interval holding portions 52. And an elastically plastically deformable damper portion 53 that absorbs vibration energy due to the relative displacement of the base portion 51 that is generated when an external force is applied to the second beam member 22A.

  In this case, a rectangular hollow portion 54 is formed by both the base portions 51 and the both interval holding portions 52, and a damper portion 53 is formed between the both interval holding portions 52 in the hollow portion 54.

  Further, in the portion 51a extending outside the interval holding portion 52 in the base portion 51, through holes 55 corresponding to the screw pockets 27e and 27f provided in the second beam members 22A and 22B are provided. A connecting bolt 56 that is a connecting member penetrating the through hole 55 is screwed to screw pockets 27e and 27f provided in the second beam members 22A and 22B, and the hysteresis damper 50 is divided into the second beam member 22A. It is connected between the opposing surfaces. The head 56a of the connecting bolt 56 is provided with a hexagonal hole 56b so that the connecting bolt 56 can be tightened or removed using a tool such as a hexagon wrench.

  In the first embodiment, a trapezoidal bent portion 51b that is bent in a substantially trapezoidal shape toward the opposing base 51 is formed in the intermediate portion of the base 51, and the interval L2 between the trapezoid bent portions 51b is maintained. It is smaller than the distance L1 between the base portions 51 by the portion 52. Instead of providing the base 51 with the trapezoidal bent portion 51b, a trapezoidal bulge may be provided in the middle of the base 51 to increase the thickness.

  In the first embodiment, the damper portion 53 is formed in a curved surface shape having the same curvature, for example, a wave shape. Here, the damper portion 53 is formed in an uneven wave shape, but instead, the damper portion 53 may be formed in an arc shape having the same curvature.

  According to the hysteresis damper 50 formed as described above, when both base portions 51 are relatively displaced and moved in parallel when an external force is applied to the second beam member 22A due to the occurrence of an earthquake, the damper portion 53 and the interval holding portion 52 are the same. Although the bending of the deformation amount occurs, since the distance of the interval holding portion 52 is longer than that of the damper portion 53, the distortion of the interval holding portion 52 can be made smaller than the distortion of the damper portion 53, and the interval before the damper portion 53 is increased. The holding portion 52 can be prevented from being broken. Thereby, the damper part 53 can absorb vibration energy in a state in which the distance between the base parts 51 is maintained (see FIG. 16A).

  Further, the connecting bolt 56 penetrating the through hole 55 provided in the portion extending outside the spacing holding portion 52 in the base portion 51 is screwed to the screw pockets 27e and 27f provided in the second beam member 22A. Thereby, the connection to the opposing surface of the divided second beam member 22A, which is the installation object of the history damper 50, can be facilitated.

  Further, by forming the damper portion 53 into a curved surface shape having the same curvature, the plastic deformation of the damper portion 53 with respect to the relative displacement (movement) of the both base portions 51 that occurs when an external force is applied to the second beam member 22A is made uniform. Therefore, the entire damper can be plastically deformed uniformly, and the vibration energy absorption performance (damping performance) can be improved.

  In addition, since the hysteresis damper 50 is formed of an aluminum extruded shape, it is easy to manufacture the hysteresis damper 50 with high dimensional accuracy, the weight can be reduced, and the recycling is suitable. Can be planned.

  In the above description, the case where the hysteresis damper 50 is disposed between the divided beam members of the second beam member 22A that forms the upper front / back beam member has been described, but other beam members, that is, the lower front / back beam members are formed. The hysteresis dampers 50 are similarly arranged in the second beam member 22B, the first beam member 21A that forms the upper side beam member, and the first beam member 21B that forms the lower side beam member. It can have a seismic function. When the hysteresis damper 50 is disposed on the second beam member 22B or the first beam members 21A and 21B, a through hole 55 provided in a portion extending outside the interval holding portion 52 of the hysteresis damper 50 is provided in the first hole member 22B. What is necessary is just to make it respond | correspond to the screw pockets 27a-27d etc. which are provided in the 2nd beam member 22B and the 1st beam members 21A and 21B.

  According to the cabinet rack 1 configured as described above, since the damper portion 53 can absorb vibration energy in the history damper 50 in a state where the distance between the base portions 51 is maintained in the event of an earthquake, the cabinet rack The shape of 1 is not impaired. Therefore, the function of the cabinet rack 1 itself (storage of the electronic device 2 and the like) is not lost even after the vibration energy is absorbed by the earthquake. In addition, the history damper 50 can be easily replaced after the vibration energy is absorbed.

  Further, the beam members constituting the cabinet rack 1 include first beam members 21A and 21B arranged in parallel with each other at the upper and lower portions of the four support columns 10 and the first beam members 21A and 21B. Since it is composed of two second beam members 22A and 22B which are formed in a short length with respect to the beam members 21A and 21B and are joined to both the first beam members 21A and 21B, the cabinet rack The overall strength (rigidity) can be increased, and the vibration energy absorption performance (damping performance) of each beam member can be enhanced.

  Further, the first and second beam members 21A, 21B, 22A, 22B are formed of an aluminum extruded profile, and screw pockets 27a to 27f that are insertion fixing portions of the connecting bolt 56 for connecting the hysteresis damper 50 are used. By forming the beam members 21A, 21B, 22A, and 22B having the connecting portions of the hysteresis dampers 50, the beam members 21A, 21B, 22A, and 22B and the hysteresis dampers 50 can be connected to each other. Can be easily.

Second Embodiment
In the first embodiment, the history damper 50 is formed with one damper portion 53 between the two gap holding portions 52 in the rectangular hollow portion 54 formed by the two base portions 51 and the two gap holding portions 52. Although the case has been described, a plurality of damper portions 53 may be provided.

  For example, as shown in FIG. 7, two damper portions 53 may be formed in a rectangular hollow portion 54 formed by both base portions 51 and both interval holding portions 52. By providing a plurality of damper portions 53 in this manner, the vibration energy absorption efficiency by the damper portions 53 can be further increased. That is, as shown in FIG. 16B, the two damper portions 53 can be elastically plastically deformed to absorb vibration energy when an external force is applied to the beam member due to the occurrence of an earthquake.

  In the above description, the case where the two damper portions 53 are formed has been described. However, if the point is symmetrical with respect to the center point C of the hollow portion 54, a plurality of three or more may be provided.

  In the second embodiment, the other parts are the same as those in the first embodiment, so the same parts are denoted by the same reference numerals and description thereof is omitted.

<Third and Fourth Embodiment>
In the first and second embodiments, the case where the damper portion 53 is formed in a curved surface shape (wave shape, arc shape) having the same curvature has been described, but the shape of the damper portion 53 is not necessarily a curved surface shape. Absent. For example, as shown in FIG. 17, a hysteresis damper 50 </ b> A having one or a plurality of (for example, two) drum-shaped damper portions 53 </ b> A having the same curvature and having both ends connected to opposite surfaces of both base portions. Good. Here, the reason why the section of the damper portion 53A has a drum shape in which the thickness of the central portion is thinner than the thickness of both end portions is that the damper is caused by an excitation force due to an earthquake or the like acting on the hysteresis damper 50A or an external force accompanying vibration. This is to facilitate the deformation of the portion 53A.

  In addition, in 3rd, 4th embodiment, since another part is the same as 1st Embodiment, the same code | symbol is attached | subjected to the same part and description is abbreviate | omitted.

<Other embodiments>
In the above-described embodiment, the case where the cabinet rack 1 using the history dampers 50 and 50A according to the present invention is applied to the cabinet rack that houses the server 7 is described. However, the cabinet rack according to the present invention is other than the server. It can also be applied to cabinet racks for storing electronic devices, other devices, and arts and crafts.

  Moreover, although the said embodiment demonstrated the case where 2nd beam member 22A, 22B was shortened with respect to 1st beam member 21A, 21B, the shape of the cabinet rack based on this invention is not necessarily limited to this. It is not something. For example, the first beam members 21A and 21B and the second beam members 22A and 22B have the same dimensions, and can be applied to a cabinet in which the upper and lower portions of the column 10 are joined.

DESCRIPTION OF SYMBOLS 1 Cabinet rack 3 Shelf board 10 Support | pillar 21A, 21B 1st beam member (a side upper beam member, a side lower beam member)
27a, 27b, 27e Upper screw pocket (insertion fixing part)
27c, 27d, 27f Lower screw pocket (insertion fixing part)
50, 50A History damper 51 Base 51a Extension part 52 Space holding part 53, 53A damper part 54 Hollow part 55 Through hole 56 Connection bolt (connection member)
62 Joining bolt L1 Interval between base holding portions L2 Interval between base damper portions

Claims (8)

Hysteresis dampers disposed between opposing surfaces of the other end of the rigid member each having one end joined to a rigid body,
A pair of bases respectively connected to opposing surfaces of the two rigid members;
A pair of interval holding portions that are connected to both the base portions at both ends and hold the interval between the base portions;
An elastically plastically deformable damper that has both ends connected to the opposing surfaces of the bases smaller than the gap between the gap holding parts and absorbs vibration energy due to the relative displacement of the base that occurs when an external force is applied to the rigid member. And
A history damper characterized by comprising: The history damper according to claim 1,
A hysteresis damper, wherein a portion of the base that extends outward from the gap holding portion is formed so as to be connectable to the opposing surface of the rigid member. In the history damper according to claim 1 or 2,
The damper is characterized in that the damper part is formed in a curved surface shape having the same curvature. The history damper according to any one of claims 1 to 3,
A history damper, wherein a plurality of damper portions are provided in parallel to each other. In the history damper according to any one of claims 1 to 4,
A hysteresis damper formed of an aluminum extruded profile. A strut composed of four rigid bodies facing each other, a rigid beam member joined directly or via a rigid member to the upper and lower portions of the strut, and a bridge member placed between the struts for placing a placement object In a cabinet rack comprising a shelf board,
The beam member is divided into two members, and the hysteresis damper according to any one of claims 1 to 5 is disposed between opposing surfaces of the divided two members, and is connected to the opposing surfaces. A cabinet rack with a history damper. In the cabinet rack using the history damper according to claim 6,
The beam members are formed to be short with respect to the first beam member and the first beam member arranged in parallel to each other at the upper and lower portions of the four columns, and joined to two adjacent beams. A cabinet rack using a hysteresis damper, comprising: two second beam members parallel to each other joined to the first beam members. In the cabinet rack using the history damper according to claim 6 or 7,
A cabinet rack using a hysteresis damper, wherein the beam member is formed of an aluminum extruded profile, and an insertion fixing portion of a connecting member for coupling the hysteresis damper is formed in a longitudinal direction.

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