JP2007162821A - Seismic isolator - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily restore a lock means to an operating state after an earthquake. <P>SOLUTION: The seismic isolator is provided with an elastic member 8 energizing an engagement member 7 capable of linearly moving in right and left directions and having an engagement end 7a engaging with a seismic isolation base engagement part, in a direction separating away from the engagement part, and a weight 29 capable of moving in fore and aft directions, abutting on the an end of the engagement member 7, formed with a lock operation face 21a and a lock release operation face 21b, suspended from a bracket 27 integral with an operation member 21 capable of linearly moving in fore and aft directions, and colliding into a receiving member 26 integral with the operation member 21 when moving. During an earthquake, the operation member 21 is moved fore and aft by impact force of the weight 29 colliding into the receiving member 26, the end 7b is moved in the direction separating away from the seismic isolator engagement part while abutting on the lock release operation face 21b of the operation member 21, engagement of the engagement end 7a and the seismic isolation base engagement part is released, and an operation piece 30 protrudes forward from the seismic isolation base 2. By pushing in the operation piece 30 backward, the lock means is set in the operating state. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an improvement of a seismic isolation device that mounts furniture or the like and reduces shaking of the furniture or the like when an earthquake occurs.

  A rolling element is provided under the seismic isolation table on which furniture such as cabinets, product display cases or electrical equipment is placed, and the rolling element is installed on the floor in synchronization with the rolling of the floor in the event of an earthquake. Many seismic isolation devices are known that reduce the shaking of furniture and the like on the base isolation table by rolling the base isolation table on the base plate or the floor surface (for example, patents) References 1 to 4).

  Further, the seismic isolation table can be locked so as to be immovable by a locking means without using a stopper of the rolling element as normally used, and when the earthquake occurs, the roll means is detected by detecting a roll caused by the earthquake. There has also been proposed a seismic isolation device including a lock release means that can be automatically released (see, for example, Patent Document 3 or 4).

Japanese Patent Laid-Open No. 11-247933 (FIG. 1-6) JP-A-11-46909 (FIGS. 1-4) JP 2002-253378 A (FIG. 1-11) Japanese Patent No. 3698189 (FIG. 1-5)

  The conventional seismic isolation device as described above can prevent the furniture and the like from falling because the shaking at the occurrence of the earthquake is reduced. However, when furniture or the like is placed on a seismic isolation device that does not have the locking means and unlocking means, the seismic isolation table may move and the furniture etc. may move due to normal use. Compared with furniture that is not placed on top, there is room for improvement that it is difficult to use in normal times.

  Even in the case where there is the lock means and the lock release means that are improved so as not to move furniture during normal use, the structure of Patent Document 3 increases the cost because the mechanism is complicated. And, after the lock release means works when the earthquake occurs and the lock means is released to reduce the shaking, the normal state, that is, the lock means is returned to the locked state by the lock means. There is room for improvement, such as not being easy. In addition, in the configuration of Patent Document 4, it is necessary to fix the substrate to the floor surface with bolts, so that it is difficult to apply in a residence or the like, and in particular, a heavy load such as furniture such as a cabinet or electrical equipment is placed. When used in a shaking table, there is room for improvement, such as it is not easy to return to the normal state after the lock release unit works when the earthquake occurs and the lock unit is released to reduce shaking. There is.

  The present invention has been made to solve the above-described problems, and is a practical seismic isolation system that can suppress the increase in cost by configuring the locking means and the unlocking means with a simple configuration. The object is to obtain a device. It is another object of the present invention to provide a seismic isolation device that can easily return the lock means to an operating state after the lock release means is activated when an earthquake occurs and the lock means is released to reduce shaking.

  In order to solve the above problems, the seismic isolation device according to the present invention is provided with a rolling element below the seismic isolation table on which furniture such as cabinets, product display cases, or electrical equipment is placed, and operates the locking means in normal times. The seismic isolation table is locked to be immovable as a state, and when the earthquake occurs, the locking means is automatically released by the unlocking means and the rolling element rolls on the base plate or the floor surface installed on the floor surface. The base isolation device for moving the base isolation base is supported by the base isolation base engaging portion provided on the lower side of the base isolation base and the base plate so as to be capable of linear motion in the left-right direction. Locking means comprising an engaging member having an engaging end that engages with a base engaging part, an elastic member for biasing the engaging member in a direction away from the base isolating base engaging part, and the engaging member Abutting on the opposite end of the left and right direction with the engagement end of A lock operation surface that extends in the front-rear direction and a lock release operation surface that is continuous with the lock operation surface and that moves in the front-rear direction and that inclines in a direction away from the base isolation table engaging portion are formed. An operation member supported in a movable manner, suspended in a bracket integrated with the operation member or a bracket provided on the base plate, or supported so as to be rotatable around a left-right axis, and movable in the front-rear direction. And a lock releasing means that collides with a receiving member that is integrated with the operating member during the movement, and in the normal state, the opposite end of the engaging member is locked to the operating member. Abutting on the operation surface, the engaging end engages with the base isolation base engaging portion, and the locking means is activated, and in the event of an earthquake, the weight body collides with the receiving member. The operation member is driven by an impact force to move and move in the front-rear direction, and with the movement, the opposite end of the engagement member abuts against the unlocking operation surface of the operation member and the seismic isolation table Since it moves in the direction away from the engagement portion, the engagement between the engagement end portion of the engagement member and the base isolation table engagement portion is released, and the lock means is released.

  Here, the receiving member is provided on the front side of the weight body, the operating member is provided on the front side of the receiving member, and the operating piece provided integrally or separately with the operating member in the unlocked state of the locking means. However, it is preferable that the locking means is activated by protruding forward from the base isolation table and pushing the operation piece backward.

  Further, it is preferable to provide a vibration damping elastic member that urges the base isolation table to return to a predetermined position in the front-rear direction with respect to the base plate in the unlocked state of the lock means.

  Further, when the seismic isolation table moves beyond a predetermined range in the front-rear direction in the unlocked state, the damping elastic for biasing the seismic isolation table in the direction reverse to the moving direction. It is preferable to provide a member.

  According to the seismic isolation device of the present invention, a rolling element is provided on the lower side of the seismic isolation table on which furniture such as cabinets, product display cases or electrical equipment is placed, and the seismic isolation device is operated with the locking means in the normal state. The base is locked so as to be immovable, and when the earthquake occurs, the lock means is automatically released by the lock release means, and the rolling element rolls on the base plate or the floor surface installed on the floor surface. Is a seismic isolation device that moves, and is provided on the lower side of the base isolation table, and is supported by the base plate so as to be capable of linear motion in the left-right direction. A locking means comprising an engaging member having an engaging end engaged with the elastic member, an elastic member for urging the engaging member in a direction away from the base isolation table engaging portion, and an engaging end of the engaging member And extends in the front-rear direction, contacting the opposite end of the left-right direction A lock operation surface and a lock release operation surface that is continuous with the lock operation surface and goes away from the base isolation table engaging portion as it goes in the front-rear direction are formed, and is supported by the base plate so as to be capable of linear movement in the front-rear direction. The operating member, a bracket integrated with the operating member, or a bracket provided on the base plate, or supported so as to be pivotable about a left-right axis and movable in the front-rear direction. Unlocking means comprising a weight that collides with the receiving member integrated with the operating member, and in normal times, the opposite end of the engaging member abuts against the locking operating surface of the operating member. The engaging end engages with the base isolation base engaging portion, and the locking means is activated, and in the event of an earthquake, due to the impact force with which the weight collides with the receiving member. The operation member is driven to move in the front-rear direction, and with the movement, the opposite end of the engagement member comes into contact with the unlocking operation surface of the operation member from the base isolation table engagement portion. Since it moves away, the engagement between the engagement end portion of the engagement member and the base isolation table engagement portion is released and the lock means is released. Since the unlocking means can be configured, the reliability can be improved and the increase in cost can be suppressed.

  The receiving member is disposed on the front side of the weight body, the operating member is disposed on the front side of the receiving member, and an operating piece provided integrally or separately with the operating member in the unlocked state of the locking means. In addition to the above-described effects, the lock release means works in the event of an earthquake to release the lock means when the lock means is activated by projecting forward from the base isolation table and pushing the operation piece backward. After reducing the shaking as a state, the locking means can be returned to the operating state very easily.

  Furthermore, in addition to the above-described effects, in addition to the above-described effects, a vibration-suppressing elastic member that urges the base isolation plate to return to a predetermined position in the front-rear direction with respect to the base plate in the unlocked state of the lock means is provided. With this structure, the vibration control effect when an earthquake occurs can be enhanced.

  Furthermore, when the seismic isolation table moves beyond a predetermined range in the front-rear direction in the unlocked state of the locking means, the vibration control device urges the seismic isolation table in a direction to push it back in the direction opposite to the movement direction. If an elastic member is provided, in addition to the above-described effects, the vibration control effect at the time of occurrence of an earthquake can be enhanced with a simple configuration.

  Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments shown in the accompanying drawings, and all the embodiments that satisfy the requirements described in the claims are described. Is included. In the present specification, the depth direction of furniture or the like is the front-rear direction, and the left and right when the front of the furniture or the like is viewed from the front is the left or right. And the seismic isolation apparatus which concerns on this Embodiment reduces the shaking of the front-back direction of furniture etc. at the time of the occurrence of an earthquake.

Embodiment 1 FIG.
1 is a plan view showing the configuration of the seismic isolation device according to Embodiment 1 of the present invention, FIG. 2 is a front view of the same, and FIG. 3 is a right side view of the same, making each member of the seismic isolation device 1 easier to see. Therefore, the seismic isolation table 2 is indicated by a two-dot chain line. 4 to 6 are explanatory views showing the configuration of the lock release means, in which FIG. 4 is a partially enlarged plan view, FIG. 5 is a front view, and FIG. 6 is a perspective view.

  The seismic isolation device 1 moves a seismic isolation table 2 on which furniture such as cabinets (not shown), product display cases, or electrical equipment is placed in the front-rear direction with respect to the base plate 3 installed on the floor surface FL when an earthquake occurs. It is possible to reduce the shaking of the furniture or the like and prevent the fall.

  Rolling element support plates 9 and 9 are attached to the left and right of the lower surface of the base isolation table 2, and nuts 12 are welded to the lower surface of the rolling element support plate 9. Further, bolts 11 and 11 are erected on the front and rear of the upper part of the rolling element support frame 10 that supports the rolling elements 13 and 13 so as to be rotatable about a left-right axis. Therefore, with the bolts 11,... Screwed into the nuts 12,..., The hexagonal wrench is engaged with the hexagonal holes 11 a provided on the upper surfaces of the bolts 11,. Thus, the level adjustment of the base isolation table 2 can be easily performed.

  After the level adjustment of the base isolation table 2 is performed in this way, the furniture and the like are stably held on the horizontal plane in a state where the furniture is mounted on the base isolation table 2. As shown in FIGS. 2 and 5, the rolling element support frames 10 and 10 have a substantially inverted U shape when viewed from the front, and are arranged around the vertical axis of the guide means 14 on the outer side surface in the left-right direction. The rotatable rollers 14a and 14a abut. Accordingly, the base isolation table 2 can move stably in the front-rear direction by rolling of the rolling elements 13,... While being guided in the front-rear direction by the guide means 14.

  Therefore, in the unlocked state R of the locking means L, which will be described later, in synchronization with the roll of the floor surface FL at the time of the earthquake occurrence, the base isolation table 2 moves back and forth as described above to prevent the furniture and the like from falling. Moreover, the vibration of the furniture etc. in the front-back direction is reduced by the elastic member for vibration suppression described later. In addition, it is good also as a structure which rolls on the floor surface FL instead of the structure which the rolling elements 13 ... roll on the baseplate 3. FIG.

  Next, the structure of the lock means L that locks the base isolation table 2 so that it cannot move during normal times and the lock release means UL that automatically releases the lock means L when an earthquake occurs will be described. As shown in FIG. 1, a support base 4 extending in the left-right direction is fixed to the front-rear center portion on the base plate 3, and as shown in FIGS. Guide members 5 and 6 in which through holes 5a and 6a (see FIG. 5) are formed are erected.

  The left and right engagement rods 7 and 7 extending in the left and right direction, which are the engagement members constituting the locking means L, are inserted into the through holes 5a and 6a so as to be directly movable in the left and right directions by the guide members 5 and 6. The engagement rods 7 and 7 are supported by compression coil springs 8 and 8 which are elastic members constituting the unlocking means UL in the left-right direction, that is, in the direction away from the left and right rolling element support frames 10 and 10. Be energized.

  Further, the left and right engagement end portions 7a and 7a of the left and right engagement rods 7 and 7 constitute a lock means L formed on the inner surface side of the left and right rolling element support frames 10 and 10 in the left and right direction. The engagement end portions 7a, 7a of the engagement rods 7, 7 are engageable with the engagement holes 10a, 10a (see FIG. 5), which are the base isolation table engagement portions. , 10 in the state of being engaged with the engagement holes 10a, 10a, the base isolation table 2 becomes immovable in the front-rear direction (operating state P of the locking means L). The left and right engaging holes 10a, 10a, which are the base isolation table engaging portions, may be engaging recesses.

  As shown in FIGS. 1 and 6, guide rollers 25 and 25 are guided by guide rails 4a and 4a fixed to the left and right center rear side of the support base 4 of the longitudinally moving body 24 at the left and right center portion on the base plate 3. Thus, it can be moved linearly in the front-rear direction. The operation member 21 constituting the unlocking means UL is inclined in a direction away from the base isolation table engaging portion 10a as it goes in the front-rear direction and continues to the lock operation surface 21a extending substantially in the front-rear direction. The lock release operation surfaces 21b are provided on the left and right sides, and are fixed to the upper surface of the front / rear moving body 24 by welding or the like.

  As described above, the engagement rods 7, 7 are urged by the compression coil springs 8, 8 in the direction away from the left and right rolling element support frames 10, 10 (engagement holes 10a, 10a). The engaging end portions 7 a and 7 a of the 7 and 7 and the end portions 7 b and 7 b on the opposite side in the left-right direction are pressed against the operation member 21.

  As shown in FIGS. 3 and 6, the weight body 29 constituting the unlocking means UL is suspended by a string body 28 on a bracket 27 fixed to the front / rear moving body 24 and integrated with the operation member 21. Therefore, it is movable in the front-rear direction, and is configured to collide with the receiving member 26 that can move linearly in the front-rear direction together with the operation member 21 when moving in the front-rear direction. Note that the weight body 29 may be attached to the tip of an arm that can rotate about the left-right direction axis instead of the string body 28, and may be movable in the front-rear direction. Further, the bracket 27 may be attached to the base plate 3.

  In normal operation, the end portions 7b and 7b of the engagement rods 7 and 7 abut against the lock operation surfaces 21a and 21a of the operation member 21, and the engagement end portions 7a and 7a are seismic isolation table engagement portions 10a. , 10a and the locking means L is in the operating state P (see FIGS. 1 to 3, 5 and 6). Further, in the event of an earthquake, the operating member 26 is driven by the impact force of the weight 29 colliding with the receiving member 26 and moves in the forward direction, and the end portions 7b of the engagement rods 7 and 7 are moved along with the movement. 7b moves in a direction away from the base isolation table engaging portions 10a, 10a while coming into contact with the unlocking operation surfaces 21b, 21b of the operation member 21, so that the engagement end portions 7a, 7a and the base isolation table engaging unit 10a are moved. , 10a is released, and the locking means L is in the released state R (see FIGS. 3 and 4).

  As shown in FIGS. 3, 4 and 6, the stopper 22 provided on the front / rear moving body 24 and the stopper 23 on the rear side of the operation member 21 are operated from the unlocked state R of the locking means L in FIG. 4. This is for ensuring and facilitating the operation when returning to the state P, and to the front of the operating member 21 so that the operating member 21 does not move too far forward with respect to the operating rods 7 and 7 by the stopper 23. The movement of the engagement rods 7 and 7 is prevented from being disengaged from the operation member 21 by the stopper 22 and the stopper 23.

  Next, an operation for returning the lock means L from the released state R to the operating state P will be described. As shown in FIGS. 1, 3, and 6, the receiving member 26 is disposed on the front side of the weight body 29, and the operation member 21 is disposed on the front side of the receiving member 26. Further, as shown in FIG. 3, in the unlocked state R of the locking means L, the operation piece 30 provided integrally with the front / rear moving body 24 and extending forward substantially horizontally is guided by the guide plate 3a (see also FIGS. 1 and 6). .) Protruding forward from the front surface of the base isolation table 2 (refer to the two-dot chain line in FIG. 3).

  Therefore, the locking means L can be easily brought into the operating state P by pushing the operating piece 30 backward (to the right in FIG. 3). When the operation piece is pushed backward, the stopper 31 provided on the front side of the operation member 21 on the front / rear moving body 24 comes into contact with the engagement rods 7 and 7 and the pushing stroke is restricted. In other words, the state in which the end portions 7b and 7b of the engagement rods 7 and 7 are in contact with the lock operation surfaces 21a and 21a is maintained. Further, by bringing the front surface 4b of the support base 4 shown in FIGS. 3 and 6 and the rear surface 24a of the front and rear moving body 24 into contact with each other, the same function as the stopper 31 can be provided. 31 may be eliminated.

  Since the lock means L and the lock release means UL can be configured with the simple configuration as described above, the reliability can be improved and the increase in cost can be suppressed. Further, after the lock release means UL is activated and the lock means L is set to the release state R in the event of an earthquake to reduce shaking, the lock means L can be returned to the operation state P very easily by operating the operation piece 30. .

  Next, the elastic member for vibration suppression will be described. .. Are formed integrally with the support shafts of the rolling elements 13,... And are extended to the left and right before and after the base isolation table 2, and groove portions 15 a,. .. Are provided upright at front and rear positions of the grooves 15a,. Therefore, if the ends of the tension coil springs 17,... That are elastic members for vibration damping are hooked on the groove portions 15 a,... And the spring hook pins 16,. 3 can be urged to return to a predetermined position in the front-rear direction, and thus, with such a simple configuration, it is possible to enhance the vibration damping effect when an earthquake occurs.

Embodiment 2. FIG.
FIG. 7 is a partially enlarged plan view showing the configuration of the seismic isolation device according to Embodiment 2 of the present invention, and the same reference numerals as those in Embodiment 1 denote the same or corresponding parts. In the configuration of the second embodiment, since there are no spring hook rods 15, 15 formed integrally with the support shafts of the rolling elements 13,... As in the first embodiment, the support shafts of the rolling elements 13,. Rolling element support shafts 20 are provided.

  The second embodiment is different from the first embodiment mainly in the configuration of the elastic member for vibration suppression. That is, in the second embodiment, the compression coil springs 18 and 18 that are elastic members for vibration suppression are provided on the front and rear, left and right of the support base 4, and are inserted into the front and rear compression coil springs 18 and 18. 4 is provided, and contact pieces 19b, 19b are attached to the front and rear ends of the support shaft 19a to prevent the compression coil springs 18, 18 from coming off. Then, in the operating state P of the locking means L, contact portions 19c, 19c are provided inside the base isolation table 2 at a position separated by a predetermined distance in the front-rear direction of the contact pieces 19b, 19b.

  Therefore, in the release state R of the locking means L, even if the base isolation table 2 moves in the front-rear direction, the left and right contact portions 19c, 19c are not in contact with the left and right contact pieces 19b, 19b. The urging force by the compression coil springs 18 and 18 does not act on the base isolation table 2. When the base isolation table 2 moves beyond a predetermined range in the front-rear direction, the contact portion 19c and the contact piece 19b of the base isolation table 2 come into contact and the compression coil springs 18 and 18 are elastically deformed. Due to the restoring force of the compression coil springs 18, the seismic isolation table 2 is biased in a direction to push it back in the direction opposite to the moving direction. Even with the simple configuration as described above, it is possible to enhance the damping effect when an earthquake occurs.

  In the above description, the locking means L is provided in the left and right engagement holes 10a or the engagement recesses that are the base isolation table engaging portions formed on the lower side of the base isolation table 2 and the base plate 3 in the left and right direction. A case is shown in which it is provided on the left and right of the base isolation table 2 and is composed of an engagement rod 7 that is an engagement member that is supported so as to be linearly movable and has an engagement end portion 7a that engages with an engagement hole 10a or an engagement recess. However, the locking means L may be provided only on either the left or right side of the base isolation table 2.

  When the locking means L is provided only on either the left or right side of the base isolation table 2, the length of the engagement rod 7 can be shortened. In addition, the engaging member is not limited to the housing, and in particular, when the locking means L is provided only on either the left or right side of the base isolation table 2, it is integrated into the left and right ends of the block as a separate or separate end. The bases 7a and 7b may be provided, or the base isolation table engaging part is a protrusion protruding inward in the left-right direction from the rolling element support frames 10 and 10, and the engaging end part 7a is engaged with the protrusion. It is good also as a recessed part.

It is a top view which shows the structure of the seismic isolation apparatus which concerns on Embodiment 1 of this invention. It is also a front view. Similarly, it is a right side view. It is a partial enlarged plan view which shows the structure of a lock release means. It is also a front view. It is a perspective view similarly. It is a partial enlarged plan view which shows the structure of the seismic isolation apparatus which concerns on Embodiment 2 of this invention.

Explanation of symbols

FL Floor L Lock means UL Lock release means P Lock means operating state R Lock means release state 1 Seismic isolation device 2 Seismic isolation base 3 Base plate 4 Support bases 5, 6 Guide member 7 Engagement rod (engagement member)
7a Engagement end 7b End 8 opposite to the engagement end 8 Compression coil spring (elastic member)
DESCRIPTION OF SYMBOLS 9 Rolling body support plate 10 Rolling body support frame 10a Engagement hole 13 Rolling body 15 Spring hook rod 15a Groove part 16 Spring hook pin 17 Tensile coil spring (elastic member for vibration suppression)
18 Compression coil spring (elastic member for vibration control)
19a Support shaft 19b Contact piece 19c Contact portion 21 Operation member 21a Lock operation surface 21b Unlock operation surface 24 Front and rear moving body 25 Guide roller 26 Receiving member 27 Bracket 28 String body 29 Weight body 30 Operation piece

Claims (4)

A rolling element is provided below the seismic isolation table on which furniture such as cabinets, product display cases, or electrical equipment is placed, and the seismic isolation table is locked so that it cannot be moved in the normal state by locking means. A seismic isolation device in which the seismic isolation table moves by rolling on the base plate or the floor surface where the rolling elements are placed on the floor surface with the locking means being automatically released by the unlocking means,
A base isolation table engaging portion provided on the lower side of the base isolation table, and an engagement end portion that is supported by the base plate so as to be linearly movable in the left-right direction and engages with the base isolation table engagement portion. Locking means comprising an engaging member;
An elastic member for urging the engaging member in a direction away from the base isolation table engaging portion;
A lock operation surface extending substantially in the front-rear direction that contacts the engagement end of the engagement member and the end opposite to the left-right direction, and the base isolation table engagement portion that continues to the lock operation surface and goes in the front-rear direction An operation member formed with an unlocking operation surface that is inclined in a direction away from the base plate and supported by the base plate so as to be capable of linear movement in the front-rear direction;
It is suspended by a bracket integrated with the operation member or a bracket provided on the base plate, or is supported so as to be pivotable about a left-right axis and is movable in the front-rear direction, and is integrated with the operation member during the movement. And a lock release means comprising a weight that collides with the receiving member.
In normal times, the opposite end of the engaging member abuts on the lock operating surface of the operating member, the engaging end engages with the base isolation base engaging portion, and the locking means In the working state
In the event of an earthquake, the operating member is driven by the impact force that the weight collides with the receiving member to move in the front-rear direction, and the opposite end of the engaging member moves along with the movement. Since it moves in a direction away from the base isolation table engaging part while abutting on the unlocking operation surface of the member, the engagement between the engagement end of the engagement member and the base isolation table engaging part is released. The seismic isolation device, wherein the locking means is in a released state.   The receiving member is disposed on the front side of the weight body, the operation member is disposed on the front side of the receiving member, and the operation piece provided integrally or separately with the operation member in the unlocked state of the locking member includes: The seismic isolation device according to claim 1, wherein the lock means is activated by projecting forward from the base isolation table and pushing the operation piece backward.   2. The seismic isolation device according to claim 1, further comprising a vibration damping elastic member that urges the base isolation table to return to a predetermined position in the front-rear direction with respect to the base plate when the lock unit is released. In the released state of the locking means, when the base isolation table moves beyond a predetermined range in the front-rear direction, an elastic member for vibration suppression that biases the base isolation table back in a direction opposite to the moving direction. The seismic isolation device according to claim 1 provided.

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