JP2014047890A - Vibration control device and vibration control frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep a low manufacturing cost as well as have a simple structure and enable a vibration control at a specified position to be carried out in a three-dimentional direction even if earthquake or the like occurs.SOLUTION: A vibration control device 1 has a support rod 13 inserted into a cylindrical container 7 storing silicone oil in it. The supporting rod 13 is provided with a short axis bolt shank 14 at its lower part and further provided with a steel pipe 15 connected to the bolt shank 14 at its upper part. A frame 3 of the cradle is fixed to the upper part of the steel pipe 15. THe lower end of the bolt shank 14 is provided with a seat plate 16, and a horizontal plate 17 having holes formed in a prescribed interval is arranged at its intermediate part to dampen vertical vibration. The bottom part of the container 7 is formed with a pot-shape taper part 23, a central lowermost part 23b is arranged at the center of the taper surface 23a to enable the seat plate 16 of the support rod 13 to be mounted there. Silicone oil 12 is positioned at a clearance among the inner surface of the container 7, the steel pipe 13 and the horizontal plate 17 to dampen horizontal vibration.

Description

  The present invention relates to a vibration damping device that damps transmission of vibration due to an earthquake or the like to a rack or other equipment in which various devices such as IT equipment and communication equipment are installed, and a vibration control base including the vibration damping device.

Conventionally, for example, a three-dimensional damper device disclosed in Patent Document 1 has been proposed as a vibration damping device in which a building including a room in which various devices such as computers and communication facilities are installed absorbs vibrations generated during an earthquake. ing.
In this damper device, a horizontal container containing a viscous material is installed on a fixed floor, and a vertically long container in which the viscous material is similarly stored is installed in the horizontal container. In a vertically long container, a column attached to the lower surface of the seismic isolation floor is inserted into the viscous body, and a disk is attached to the lower end of the column.

  When the building receives a seismic force due to the earthquake, and the fixed floor and the base isolation floor vibrate rapidly in the horizontal direction, the viscous material that enters the gap between the circular plate provided on the pillar of the damper device and the vertically long container horizontally Damping direction vibration. Moreover, in the vertical vibration, the vertical vibration can be attenuated by the disc and the viscous body in the vertically long container. As a result, the function of suppressing the vibration in the three-dimensional direction is exhibited, and the vibration of the seismic isolation floor, the rack, and other equipment can be attenuated.

Japanese Utility Model Publication No. 1-85549

  However, the above-described three-dimensional damper device has the disadvantages that the structure is complicated such as providing double containers, the manufacturing cost is high, and the installation space is large. In addition, since the viscous body is interposed in the gap between the bottom of the vertically long container and the horizontal container, the vertically long container is inclined in a horizontal direction with respect to the horizontal container due to vibration caused by an earthquake. There is. In this case, since the vertically long container is inclined relative to the support column, there is a disadvantage that the vibration damping function in the horizontal direction and the vertical direction may be deteriorated.

  The present invention has been made in view of such circumstances, and a vibration damping device and a vibration damping device that can perform vibration damping in a three-dimensional direction against vibrations such as earthquakes and suppress the inclination of a column due to vibrations. The purpose is to provide a platform.

In the vibration damping device according to the present invention, a column is inserted into a cylindrical container containing a viscous body, a base is installed on the top of the column, and a plate is fixed to an intermediate portion. A gap is formed between the inner surface and a tapered portion for positioning the lower end of the support column is formed at the bottom of the container.
According to the vibration damping device of the present invention, when an earthquake or the like occurs, the vibration in the horizontal direction is attenuated by the shear resistance of the viscous material that enters the gap between the plate provided in the middle part of the column and the inner surface of the container, and the vertical direction Is attenuated by the shear resistance of the viscous body between the plate and the bottom of the container, and the vibration in the three-dimensional direction to the gantry provided on the upper part of the support column can be suppressed. In addition, when the column vibrates in the container due to horizontal and vertical vibrations, the column may incline within the container if the width is narrow, but the lower end of the column is a taper of a tapered portion provided at the bottom of the container. It is guided along the surface and settles at a fixed position at the lowermost part of the taper portion, and can be prevented from standing still in an inclined state.

In addition, the taper portion is formed in a mortar shape with the center of the bottom of the container being the lowermost part, and a gap is formed between the plate and the inner surface of the container with the support column positioned at the lowermost part of the bottom part. preferable.
When the horizontal vibration is attenuated by the plate, the column may tilt, but the lower end of the column is guided by the taper at the bottom of the container and settles to the bottom of the mortar-shaped center. It can be prevented from standing still and can exhibit a stable three-dimensional attenuation function during the next earthquake.

Moreover, it is preferable that the support | pillar is provided with the axial part which fixed the plate, and the steel pipe connected with the upper side of this axial part.
The vibration damping device according to the present invention has high rigidity and strength because the upper part of the support is formed of a steel pipe, and can withstand load and vibration without buckling of the support even if the weight of the mount or the equipment installed on the mount is large.

Moreover, it is preferable that the recessed part into which the said support | pillar falls is formed in the lowest part in a taper part.
When the horizontal vibration is relatively small by forming a recess at the bottom of the tapered portion of the bottom of the container and allowing the support to fall into the recess, the support is held in the recess in the horizontal direction. The vibration is converted into the vibration in the vertical direction, and the vibration in the three-dimensional direction can be attenuated. In addition, when the vertical and horizontal vibrations are relatively large, even if the column protrudes from the recess, the lower end of the column is guided along the taper surface of the taper and falls into the recess and is fixed. Become.

The vibration damping base according to the present invention includes one or a plurality of the above-described vibration damping devices, and a base is provided on the top of these vibration damping devices.
According to the vibration control frame according to the present invention, the frame on which various facilities and the like are installed is supported by the above-described vibration control device, so that vibration can be attenuated and absorbed in the horizontal and vertical directions in the event of an earthquake or the like. In addition, even if the column connected to the base of the vibration control device is tilted by vibration in the event of an earthquake or the like, the lower end of the column is guided by the tapered portion provided at the bottom of the container and moved to a fixed position to tilt. Since the state is canceled and the upright state is established, the container can be held in a stable posture.

According to the vibration control device and the vibration mount according to the present invention, even if vibration due to an earthquake or the like occurs, the viscous body and the column having the plate in the middle are installed in the container, so that the vibration in the three-dimensional direction is attenuated. In addition, the structure is simple and the manufacturing cost is low.
In addition, even if the support column is tilted by vibrations in a three-dimensional direction such as an earthquake, the lower end of the support column is guided by a tapered portion provided at the bottom of the container to cancel the tilted state and return to the fixed position of the container in the standing state. It can position so that the vibration damping function in the three-dimensional direction can be exhibited reliably.

It is a principal part block diagram which shows the damping stand using the damping device by 1st embodiment of this invention. It is a principal part longitudinal cross-sectional view which shows the structure of the damping device by 1st embodiment. It is a top view of the horizontal plate provided in the intermediate part of the support | pillar of the damping device shown in FIG. It is a principal part longitudinal cross-sectional view which shows the structure of the damping device by 2nd embodiment. It is a principal part longitudinal cross-sectional view which shows the structure of the damping device by 3rd embodiment. It is a principal part longitudinal cross-sectional view which shows the part of the horizontal plate of the damping device by a modification.

Hereinafter, a vibration damping device and a vibration damping stand according to an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 shows a vibration control base 2 provided with a vibration control device 1 according to a first embodiment of the present invention.
The vibration damping base 2 in the present embodiment includes a plurality of, for example, four damping devices 1, and the upper portions of the damping devices 1 are connected to each other by a frame 3 and formed in, for example, a rectangular frame shape. This rectangular frame-shaped frame 3 constitutes a vibration control base 4 for installing various devices such as IT devices and communication devices and other facilities.

Next, the vibration damping device 1 of the vibration damping rack 2 will be described with reference to FIG.
In the vibration damping device 1 according to the present embodiment, a container 7 is installed on a floor surface 6 of a building, and the container 7 is provided with, for example, a cylindrical tube portion 8 having a relatively small outer diameter and a substrate 9 that forms the bottom thereof. It is formed in a bottom cylindrical shape, and the substrate 9 is wider than the cylindrical portion 8 and is fixed to the floor surface 6 by anchor bolts 10. Moreover, the upper end of the container 7 is opened. A lid may be installed in the upper end opening of the container 7 in order to prevent foreign substances such as dust from entering, but it is preferable to install the lid so as to be able to swing without being fixed to the container 7. .

  In the container 7, for example, silicon oil 12 is stored as a viscous material at a depth of 1/2 or more in the height direction of the container 7. It is inserted so as to be swingable in the vertical direction. The support column 13 is a jig for supporting a vertical load, and a relatively short bolt shaft 14 is provided as a shaft portion at the lower portion in the longitudinal direction, and the upper portion is screwed to the tip of the bolt shaft 14 to be connected. A steel pipe 15 is provided.

The bolt shaft 14 of the column 13 has a seating plate 16 fixed to the lower end thereof, and a horizontal plate 17 is connected between the seating plate 16 and the steel pipe 15. As shown in FIG. 3, the horizontal plate 17 has holes 17a formed at predetermined intervals around the screw shaft 14, so that the fluidity and vibration damping force of the silicon oil 12 can be adjusted by the number and area of the holes 17a. It has become.
The steel pipe 15 has a cylindrical side surface portion 18 and a bottom plate 19, and the bolt shaft 14 is screwed into the bottom plate 19 of the steel pipe 15 and fixed with a double nut 20. Further, the horizontal plate 17 forms a disk having a larger diameter than the seating plate 16 and has substantially the same outer diameter as the bottom plate 19 of the steel pipe 15. The upper ends of the steel pipes 15 protrude above the container 7 and are connected to the ends of the two frames 3 at the corners of the gantry 4 via, for example, ring-shaped connecting plates 22.

A gap K is formed over the entire circumference of the outer peripheral surface of the horizontal plate 17 and the steel pipe 15 between the inner surface of the container 7 and is filled with silicon oil 12.
Further, a mortar-shaped tapered portion 23 is formed on the substrate 9 at the bottom of the container 7, and the lowermost portion 23 b at the center surrounded by the tapered surface 23 a over the entire circumference is a circular shape slightly larger than the seating plate 16. The seating plate 16 of the column 13 can be placed on the lowermost part 23b. A lowermost portion 23 a of the tapered surface 23 is formed concentrically with the container 7. As a result, when the support column 13 vibrates in the three-dimensional direction of the horizontal direction and the vertical direction, the support column 13 may incline due to its small width. Even in this case, the lower end portion of the support column 13 is the tapered surface of the tapered portion 23. It will be guided by 23a, will return to the lowest lowest part 23b of the center of the container 7, will cancel | release an inclination state, and will be hold | maintained at a standing state.

The vibration damping device 1 and the vibration damping base 2 according to the present embodiment have the above-described configuration, and the operation during an earthquake will be described next.
When an earthquake occurs in a building equipped with the vibration control stand 2, vibrations in the three-dimensional direction are transmitted from the floor surface 6 to the vibration control device 1, and are also transmitted to the control stand 2. In the vibration damping device 1, the horizontal vibration is damped by the shear resistance of the silicon oil 12 filled in the gap K between the inner surface of the container 7 and the horizontal plate 17 of the support column 13 and the steel pipe 15. Further, the vertical vibration is attenuated by the shear resistance of the silicon oil 12 between the horizontal plate 17 and the substrate 9 at the bottom of the container and between the horizontal plate 17 and the bottom 19 of the steel pipe 15. In addition, by forming the plurality of holes 17a formed at predetermined intervals in the horizontal plate 17, the flow resistance of the silicon oil 12 can be adjusted, and the tensile force in the vertical direction can be adjusted. As a result, the load in the pulling direction with respect to the anchor bolt 10 fixed to the substrate 9 of the container 7 can be reduced.

  Moreover, since the container 7 and the support column 13 are relatively long, when the vibration in the three-dimensional direction occurs in the horizontal direction and the vertical direction, the support column 13 swings in the three-dimensional direction to attenuate the vibration and The seating plate 16 at the lower end is disengaged from the lowermost portion 23 b of the taper portion 23, and is inclined in the oblique direction within the container 7. Then, the seating plate 16 at the lower end of the support column 13 comes into contact with the taper surface 23a of the taper portion 23 at the bottom of the container 7, and is lowered by being guided by the taper surface 23a due to the vibration of the earthquake. When returning to the lowermost portion 23b at the center of 23 and sitting, the support column 13 is released from the inclined posture with respect to the container 7 and is held upright at the center position. Therefore, at the time of the next earthquake, the support column 13 can exhibit a stable damping function against vibration in the three-dimensional direction.

  Therefore, in the control gantry 2 provided with a plurality of vibration control devices 1, vibration transmission to the frame 3 of the gantry 4 is reduced, and the support column 13 is guided by the taper portion 23 and settles in a standing state at the lowermost portion 23 b at the center. Therefore, the gantry 4 is held in a state where the vibration is attenuated, and can be controlled.

As described above, according to the vibration damping device 1 according to the present embodiment, the vibration caused by the earthquake or the like is generated in the three-dimensional direction in the horizontal direction and the vertical direction by the shear resistance of the silicon oil 12 between the column 13 inserted in the container 7. The vibration transmitted from the floor surface 6 to the gantry 4 can be attenuated. Further, the tensile force of the anchor bolt 10 can be reduced by the shear resistance of the silicon oil 12 between the horizontal plate 17 and the bottom of the container 7.
In addition, since a high-rigidity steel pipe 13 is installed in the upper region of the support column 13 and connected to the frame 3 of the gantry 4, various equipment such as heavy IT equipment and communication equipment can be used when an earthquake or the like occurs. Even if equipment and equipment are installed, it is possible to control the vibration by damping the vibration by preventing the buckling 13 from buckling.

  Further, by adjusting the number and area of the holes 17a formed in the horizontal plate 17, the fluidity of the silicon oil 12 can be controlled, and the vibration damping force and the impact amount in the vertical direction can be adjusted. Further, the support column 13 inserted into the container 7 contributes to the attenuation of the vibration in the three-dimensional direction, and even if it is inclined in the oblique direction due to the vibration, the mortar-shaped taper portion 23 formed on the bottom of the container 7. The seating plate 16 at the lower end of the column 13 is guided to the taper surface 23a and descends to the lowermost portion 23b, and the tilted posture is canceled and held in the center of the container 7. Stable damping function can be demonstrated against vibration.

  Further, according to the vibration control base 2 using such a vibration control device 1, even if an earthquake or the like occurs, the vibration control device 1 attenuates the vibration in the three-dimensional direction, and each vibration control device 1 includes a container 7. It is possible to return the seating plate 16 of the support column 13 to the central lowermost portion 23b of the mortar-shaped tapered surface 23a by the tapered portion 23 provided at the bottom of the mortar and return from the inclined state to the standing state. Various equipment can be supported stably.

Note that the vibration damping device 1 and the vibration damping base 2 according to the present invention are not limited to the above-described embodiments, and appropriate modifications, replacements, and the like can be employed without changing the gist of the present invention.
Next, other embodiments and modifications of the present invention will be described, but the same or similar parts and members as those of the vibration damping device 1 according to the first embodiment described above will be denoted by the same reference numerals, and description thereof will be omitted.
FIG. 4 shows a vibration damping device 1A according to the second embodiment. In this embodiment, the support 13A does not have the steel pipe 15, and is a rod 25 made of, for example, a PC steel rod over the entire length. Yes. The lower end of the rod 25 is connected to a seating plate 16 that can be seated at the lowermost central portion of the taper portion 23, and is wider than the seating plate 16 at the middle portion between the inner surface of the container 7 and the entire circumference. A horizontal plate 17 that forms a gap K is connected to each other. The upper end of the rod 24 protrudes upward from the upper end of the container 7 and is connected to the frame 3 of the gantry 4 via the connecting plate 22.

  According to the vibration damping device 1 </ b> A according to the second embodiment, since the column 13 </ b> A is the rod body 25, a gantry provided with a facility that is relatively lighter than the first embodiment in which the steel pipe 15 is installed on the upper side of the column. Suitable for supporting 4. The other effects are the same as those of the vibration damping device 1 according to the first embodiment.

Next, a vibration damping device 1B according to a third embodiment of the present invention will be described with reference to FIG.
5 schematically has the same configuration as the vibration damping device 1A according to the second embodiment, but in the vibration damping device 1B according to the present embodiment, the rod body 27 as the support column 13B has a lower end. The seating plate 16 is not provided in the part, and extends straight in a rod shape.
The tapered portion 28 provided at the bottom of the container 7 has a tapered surface 28 a formed in a mortar shape toward the center of the container 7 and a cylindrical shape in which the lowermost central portion that is the bottom of the mortar extends to the substrate 9 of the container 7. And a recess 29. A slight gap K1 is formed in the entire circumference of the recess 29 with respect to the outer diameter of the rod 27, and the gap K1 is also filled with silicon oil 12. Therefore, the cross section of the taper part 28 is formed in a substantially trapezoidal shape.
The vibration damping device 1B according to the present embodiment is common to the vibration damping device 1A according to the second embodiment in the remaining configuration.

Since the vibration damping device 1B according to the third embodiment has the above-described configuration, when a relatively small earthquake occurs, the lower end of the rod body 27 is inserted into the recess 29, and the vertical vibration is horizontal. Damped by the shear resistance of the silicone oil 12 between the plate 17 and the tapered surface 28 at the bottom of the container 7. Moreover, the rod body 27 has a smaller amplitude of vibration in the vertical direction than the depth of the concave portion 29 of the tapered portion 26, and does not come out of the concave portion 29.
Therefore, since the rod 27 is held in the recess 29 of the tapered portion 28, horizontal vibration is suppressed to a small level. In this case, the horizontal vibration range of the rod 27 is narrow, and the horizontal vibration is converted into a vertical vibration. As described above, the silicon between the horizontal plate 17 and the tapered surface 28 at the bottom of the container 7 is used. Damped by the shear resistance of the oil 12. Inclination of the rod body 27 is also suppressed by horizontal vibration, and the rod body 27 is always supported in an upright state in the central recess 29.
As a result, the vibration damping device 1B according to the present embodiment can significantly reduce the rolling of the rod 27 and the gantry 4 due to vibration, compared to the vibration damping devices 1 and 1A according to the first and second embodiments described above.

Further, when the vibration of the earthquake is large, the rod body 27 is pulled upward from the concave portion 29 of the tapered portion 28 by the vibration in the vertical direction. Therefore, the vibration in the horizontal direction is attenuated by the shear resistance of the silicon oil 12 filled in the gap K between the inner surface of the container 7 and the horizontal plate 17 of the support column 27. The vertical vibration is damped by the shear resistance of the silicon oil 12 between the horizontal plate 17 and the tapered portion 28 at the bottom of the container 7.
In this case, the vertical and horizontal vibrations cause the rod body 27 to escape from the recess 29 and vibrate. When the rod body 27 vibrates in the three-dimensional direction, the rod body 27 is slanted in the container 7 while damping the vibration. May tilt in the direction. Then, since the vibration width of the rod 27 is reduced, the vibration damping effect by the silicon oil 12 is reduced.
Even in this case, the lower end portion of the rod body 27 abuts against the tapered surface 28a of the tapered portion 28 at the bottom of the container 7, so that the rod 27 is guided by the tapered surface 28a while being vibrated and moves in the central direction and falls into the recess 29. The rod 27 is returned from the inclined state to the standing state.

  Therefore, in the vibration damping device 1B according to the third embodiment, in an earthquake with relatively small vibration, the rod body 27 is held in the concave portion 29 of the tapered portion 28 to convert the horizontal vibration into the vertical vibration. Since it can suppress, the damping effect to the mount frame 4 connected with the rod 27 becomes larger than the damping device 1A by 2nd embodiment. The other effects are the same as those of the vibration damping devices 1 and 1A according to the first and second embodiments described above.

The vibration damping devices 1, 1A, 1B according to the above-described embodiments can be installed in a narrow space because the container 7 can be formed with a small outer diameter.
In addition, in the vibration damping devices 1A and 1B according to the second to third embodiments described above, a lid is not provided at the upper end opening of each container 7, but a lid is installed as in the first embodiment. May be. In this case, it is only necessary to prevent foreign matters such as dust from falling into the silicone oil 12 of the container 7, and the lid does not have to be fixed to the upper end of the container 7 or the columns 13 </ b> A and 13 </ b> B.
In the vibration damping devices 1, 1 </ b> A, 1 </ b> B according to the above-described embodiments, the horizontal plate 17 forms holes 17 a at predetermined intervals, and controls the fluidity of the silicon oil 12 through these holes 17 a to thereby attenuate vibrations. However, the horizontal plate 17 according to the present invention is not limited to the above-described configuration. For example, you may use the horizontal plate 17 which does not provide the hole 17a.

Alternatively, as shown in FIG. 6, a check valve 31 that can be opened and closed via a hinge portion may be installed on the lower side of the hole 17 a formed in the horizontal plate 17. In this case, the holes 17a are opened by the check valve 31 when the support columns 15, 25, and 27 are moved upward by vibration in the vertical direction, and the silicon oil 12 flows and the holes 17a are not checked when moved downward. The flow of the silicon oil 12 can be stopped by being closed by the valve 31.
You may make it adjust the damping function by the vibration of an up-down direction by employ | adopting such a check valve 31. FIG. As the check valve, a configuration in which a stepped through hole is formed in the horizontal plate 17 in place of the above-described configuration, and a ball or the like is disposed as a valve body in the step portion may be adopted.

Further, in the vibration damping device 1 according to the first embodiment, the lower part of the steel pipe 15 in the column 13 is the bolt shaft 14, but a shaft body without a male screw may be used, and connected to the bottom portion 19 of the steel pipe 15 by welding or the like. May be.
Further, in the first and second embodiments, the seating plate 16 is fixed to the lower end of the bolt shaft 14 and the rod body 25 on the lower side of the support column 13, but the bolt shaft 14 and the rod body are not installed without installing the seating plate 16. The lower end portion of 25 itself may be positioned at the central lowermost portion 23b of the taper portion 23 so as to be stationary.
Moreover, in 3rd embodiment, you may connect the steel pipe 15 to the upper part side of the support | pillar 13B.

The control gantry 2 in the first embodiment described above appropriately employs not only the vibration damping device 1 according to the first embodiment but also the vibration damping device 1A according to the second embodiment, the vibration damping device 1B according to the third embodiment, and the like. can do. Moreover, although the control gantry 2 is provided with the gantry 4 using the four vibration control devices 1 as the leg portions, the leg limbs are not limited to four, and any one or a plurality of leg portions can be adopted. Further, the vibration damping devices 1, 1 </ b> A, and 1 </ b> B according to different embodiments may be attached to the gantry 4 in combination.
Further, although the silicon oil 12 is used as the viscous body stored in the container 7 of the vibration damping device 1, 1A, 1B, the viscous body according to the present invention is not limited to the silicone oil 12, and other oils or the like can be appropriately used. A fluid material having high viscosity can be employed.

  Further, although the above-described vibration damping devices 1, 1A, 1B have been described as being used as the legs of the control gantry 2, the vibration damping device according to the present invention is not limited to such a configuration. For example, a vibration control device is installed on the foundation or fixed floor of the building as the floor 6 and the floor or lower surface of the structure or a base isolation floor is connected as a pedestal to be connected to the upper part of the support column. It can also be used as a seismic isolation device that is controlled so as not to receive as much as possible.

1, 1A, 1B Damping device 2 Damping frame 3 Frame 4 Frame 7 Container 8 Tube portion 12 Silicon oil 13, 13A, 13B Post 14 Bolt shaft 15 Steel pipe 16 Seat plate 17 Horizontal plate 17a Holes 23, 28 Tapered portion 23a, 28a Tapered surfaces 25, 27 Rod 29 Recess

Claims (5)

  A strut is inserted into a cylindrical container containing a viscous body, a pedestal is installed on the top of the strut, and a plate is fixed to an intermediate portion, and a gap is formed between the plate and the inner surface of the container. A vibration damping device, wherein the bottom portion of the container is formed with a tapered portion for positioning the lower end portion of the support column.   The tapered portion is formed in a mortar shape in which the center of the bottom portion of the container is the lowermost portion, and a gap is formed between the plate and the inner surface of the container in a state where the support column is located at the lowermost portion of the bottom portion. The vibration damping device according to claim 1.   The vibration control device according to claim 1 or 2, wherein the support column includes a shaft portion to which the plate is fixed, and a steel pipe connected to an upper side of the shaft portion.   The vibration damping device according to any one of claims 1 to 3, wherein a concave portion in which the support column falls is formed at a lowermost portion of the tapered portion.   One or more damping devices according to any one of claims 1 to 4, wherein the damping table is provided on an upper portion of the damping device.

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