JP7078558B2 - Vibration damping device - Google Patents

Description

The present invention relates to a vibration damping device of a type in which a movable mass is driven by a linear motor.

For structures such as high-rise buildings, vibration control is performed by using the inertial force of a weight (movable mass) that can move in one axis or two axes for the purpose of reducing vibration caused by wind or earthquake. It may be configured with a device.

As one type of vibration damping device, there is an active vibration damping device that detects the shaking of a structure with a sensor and controls a movable mass with an actuator.

Further, as an active type vibration damping device, a linear motor type vibration damping device in which a linear motor is adopted as an actuator for applying a driving force to a movable mass is known.

By the way, from the viewpoint of mechanics, the linear motor type vibration damping device is advantageous in that the linear motor is arranged under the movable mass.

Therefore, the linear motor type vibration damping device has a configuration in which movable masses are supported so as to be movable in one axial direction via a pair of guides on a foundation frame installed in a structure to be vibration-controlled. , The stator of the linear motor is provided between the pair of guides in an arrangement along the moving direction of the movable mass, and the mover of the linear motor is provided in an arrangement facing the stator on the lower surface side of the movable mass. Has been previously proposed (see, for example, Patent Document 1 (FIG. 1)).

JP-A-2015-190572

By the way, in the vibration damping device, if the linear motor fails or deteriorates over time, it becomes necessary to maintain the linear motor.

When servicing a linear motor, if the movable mass is arranged closer to one end side in the longitudinal direction of the guide or to the other end side, the movable mass is arranged linearly on the opposite side to the arrangement of the movable mass in the longitudinal direction of the guide. A space can be formed above the stator of the motor.

Therefore, the stator of the linear motor adjusts the position of the movable mass so that a space is formed above the stator to be maintained, so that the operator can from above the stator to be maintained. , It is possible to carry out maintenance such as repair and replacement.

On the other hand, the movable element of the linear motor is attached to the lower side of the movable mass, and the gap with the stator is maintained at about 1 mm. Therefore, it is not possible to secure a space for the operator to perform maintenance from below for the movable element of the linear motor attached to the lower side of the movable mass.

If the movable mass is once removed from the guide to expose the lower surface side of the movable mass to which the movable element is attached, it is considered possible to maintain the movable element.

However, in order to implement this method, it is necessary to secure a storage place for temporarily placing the removed movable mass separately from the place where the vibration damping device is installed.

Moreover, when the scale of the structure to be vibration-damped is large, the movable mass of the vibration-damping device may reach a weight of 100 tons or the like. In this case, the movable mass is removed from the guide to the storage location. The work of transporting is a large-scale work using a crane or the like.

Therefore, it is desired to improve the maintainability of the vibration damping device having a configuration in which the mover of the linear motor is attached to the lower side of the movable mass.

Therefore, the present invention is intended to provide a vibration damping device having a configuration in which a linear motor is adopted as an actuator for driving a movable mass, which can improve maintainability.

In order to solve the above problems, the present invention has a base, a guide device extending in one direction provided on the base, a movable child seat movably held by the guide device so as to be reciprocally movable, and the movable child seat. A movable mass mounted on the upper surface of the base, a linear motor for applying a driving force to the movable child seat and the movable mass, and the linear motor includes a stator attached to the upper surface of the base and the stator. The movable child seat is provided with a movable element attached to the lower side of the movable child seat, the movable child seat is provided with a pin protruding upward from the upper surface of the movable child seat, and the movable mass is provided on the lower surface side of the movable mass. The vibration damping device has a structure including a fitting hole into which the pin of the movable child seat is inserted and a jack-up point.

The movable mass has a configuration in which both side edges in a direction orthogonal to the reciprocating movement direction of the movable child seat project to both outer sides of the movable child seat, and the jack-up point is the both side edges of the movable mass. It may be configured to be provided in the region overhanging both outer sides of the movable child seat in the portion.

As the movable child seat, a plurality of movable child seats held in the guide device so as to be reciprocally movable are provided, and the plurality of movable child seats are individually provided with pins protruding upward from the upper surface of each movable child seat. The movable mass has a shape extending in the reciprocating movement direction of each movable child seat, and is provided with a plurality of fitting holes on the lower surface side of the movable mass along the reciprocating movement direction of the movable child seat. It may be configured.

According to the vibration damping device of the present invention, maintainability can be improved.

It is a schematic side view which shows the 1st Embodiment of the vibration damping device. It is a schematic side view which shows the state which jacked up the movable mass by the vibration damping device of FIG. It is a schematic plan view of the vibration damping device of FIG. It is the AA direction arrow view of FIG. It is an enlarged figure which shows the pin for positioning provided in the movable child seat. It is a schematic side view which shows the 2nd Embodiment of the vibration damping device. It is a schematic side view which shows the state which jacked up the movable mass by the vibration damping device of FIG. It is a schematic plan view of the vibration damping device of FIG.

Hereinafter, the vibration damping device of the present disclosure will be described with reference to the drawings.

[First Embodiment]
FIG. 1 is a schematic side view showing a first embodiment of the vibration damping device. FIG. 2 is a schematic side view showing a state in which a movable mass is jacked up by the vibration damping device of FIG. 1.

FIG. 3 is a schematic plan view of the vibration damping device of FIG.

FIG. 4 is a view taken along the line AA of FIG.

FIG. 5 is a cut side view showing an enlarged position of a positioning pin provided on the movable child seat.

The vibration damping device of this embodiment is shown by reference numeral 1 in FIGS. 1, 2, 3, and 4.

In the present embodiment, as shown in FIG. 3, for convenience of explanation, one axial direction in two axial directions orthogonal to each other in the horizontal plane is referred to as an X direction, and the other axial direction is referred to as a Y direction. The configuration of 1 will be described assuming that the reciprocating movement direction of the movable mass 2 described later coincides with the X direction. It should be noted that the X direction and the Y direction are not related to the directions such as north, south, east, and west, and also define the direction when the vibration damping device 1 of the present embodiment is installed in a structure to be vibration controlled (not shown). It's not a thing.

The vibration damping device 1 of the present embodiment includes a base 3 installed in a structure (not shown) to be vibration controlled, a pair of guide devices 4 provided on the base 3 in a posture along the X direction, and a guide. For example, three movable child seats 5a, 5b, 5c, and a movable mass 2 placed on the upper side of each movable child seat 5a, 5b, 5c, which are held by the device 4 so as to be reciprocally movable along the X direction, It is configured to include a linear motor 6 as an actuator for applying a driving force to the movable child seats 5a, 5b, 5c and the movable mass 2. Further, in the vibration damping device 1 of the present embodiment, the movable child seats 5a, 5b, 5c are provided with positioning pins 7a, 7b, 7c protruding upward from the upper surface of the movable child seats 5a, 5b, 5c. The movable mass 2 is provided with fitting holes 8a, 8b, 8c provided on the lower surface side of the movable mass 2 and into which pins 7a, 7b, 7c are individually inserted, and a jack-up point 9. It is said that.

In the present embodiment, the base 3 is a rectangular plate-shaped member extending in the X direction.

The X-direction dimension of the base 3 is set corresponding to the X-direction dimension required for the rail 10 of the guide device 4. The setting of the length dimension of the rail 10 of the guide device 4 in the X direction will be described later.

As shown in FIGS. 1 and 3, the guide device 4 includes a rail 10 installed on the upper side of the base 3 in a posture extending in the X direction, and a plurality of blocks 11 slidably attached to the rail 10. It is said to be composed.

As shown in FIGS. 3 and 4, the guide devices 4 are provided on the base 3 in pairs at intervals set in the Y direction. Each guide device 4 includes six blocks 11.

Each of the movable seats 5a, 5b, and 5c is a rectangular plate-shaped member, and has a total of four blocks 11 consisting of two blocks 11 of one guide device 4 and two blocks 11 of the other guide device 4. The blocks 11 are attached to the four corners on the lower surface side of the movable child seats 5a, 5b, and 5c, respectively. As a result, the movable child seats 5a, 5b, and 5c are held on the rail 10 so as to be reciprocally movable in the X direction via the corresponding block 11.

As the guide device 4, it is preferable to use a linear guide type guide device 4 called a linear guide, but the load of the movable mass 2 is applied to each block 11 via the movable child seats 5a, 5b, 5c. It goes without saying that any type of guide device 4 may be adopted as long as each block 11 can reciprocate along the rail 10 under the received condition.

As shown in FIGS. 1 to 5, the upper surfaces of the movable child seats 5a, 5b, and 5c are the mounting surfaces of the movable mass 2. The movable child seats 5a, 5b, 5c are arranged in the X direction at intervals described later, and one movable mass 2 extending in the X direction is placed on the upper side of the movable child seats 5a, 5b, 5c. ing. In this state, the movable mass 2 is supported on the base 3 via the movable child seats 5a, 5b, 5c and each guide device 4, and is X together with the movable child seats 5a, 5b, 5c. It becomes possible to move back and forth in the direction.

On the other hand, each of the movable child seats 5a, 5b, 5c releases the support of the movable mass 2 by the movable child seats 5a, 5b, 5c by the jack-up process of displacing the movable mass 2 upward as shown in FIG. In this state where the support of the movable mass 2 is released, the movable child seats 5a, 5b, and 5c can be individually moved in the X direction.

As shown in FIGS. 3 and 4, the linear motor 6 includes a stator 12 attached to the base 3 between a pair of guide devices 4 arranged at intervals in the Y direction. Further, the linear motor 6 includes three movers 13a, 13b, 13c arranged in the X direction, and each mover 13a, 13b, 13c is individually placed below each mover seat 5a, 5b, 5c. It has an attached configuration.

In the linear motor 6, the stator 12 attached to the base 3 is a permanent magnet, and the three movers 13a, 13b, 13c attached to the movable child seats 5a, 5b, 5c are provided with coils. ing.

As a result, the linear motor 6 causes the movers 13a, 13b, 13c to operate in the X direction with respect to the stator 12 by passing a current through the coils of the movers 13a, 13b, 13c to generate a magnetic field. Can be made to. Therefore, in the vibration damping device 1 of the present embodiment, when the movable mass 2 is mounted on the movable child seats 5a, 5b, 5c, the X direction generated by the movable elements 13a, 13b, 13c of the linear motor 6 is generated. Can be applied to the movable mass 2 as a driving force for reciprocating in the X direction via the movable child seats 5a, 5b, and 5c.

In the linear motor 6, in order to synchronously generate a force in the same direction along the X direction by the plurality of movers 13a, 13b, 13c arranged in the X direction, the movers 13a, 13b, 13c are used. It is necessary to align the relative positions of the stator 12 with respect to the magnetic poles.

On the other hand, when the positions of the movers 13a, 13b, 13c relative to the magnetic poles of the stator 12 are displaced, the movers 13a, 13b, 13c generate a force in the same direction along the X direction. Since the timing shift occurs, the driving force applied to the movable seats 5a, 5b, 5c and the movable mass 2 decreases, and the forces generated by the movable elements 13a, 13b, 13c cancel each other out to move. There is a possibility that the mass 2 cannot be driven.

By the way, in the vibration damping device 1 of the present embodiment, when the maintenance method described later is carried out, the support of the movable mass 2 by the movable child seats 5a, 5b, 5c is temporarily released by the jack-up process of the movable mass 2. do. After that, the vibration damping device 1 of the present embodiment performs a process of repositioning the movable mass 2 on the movable child seats 5a, 5b, 5c when returning to the operable state.

Therefore, the vibration damping device 1 of the present embodiment has the movable elements attached to the movable element seats 5a, 5b, 5c when the movable mass 2 is placed on the movable element seats 5a, 5b, 5c. It is required that the relative positions of the stators 12 of 13a, 13b and 13c with respect to the magnetic poles are the same relative positions each time.

Therefore, as shown in FIGS. 2 and 5, the vibration damping device 1 of the present embodiment has a configuration in which the movable child seats 5a, 5b, 5c are provided with positioning pins 7a, 7b, 7c protruding upward. The movable mass 2 is integrally provided with the plate member 14 on the lower end side, and the pins 7a, 7b, 7c are inserted into the plate member 14 from below to fit the three fitting holes 8a, 8b. , 8c.

Each movable seat 5a, 5b, 5c is a circular pin mount with an inner diameter slightly larger than the diameter of the corresponding pin 7a, 7b, 7c, for example, at a set position in or near the center of the top surface. It is provided with a hole 15 for use. A screw hole 16 is provided on the inner bottom surface of the hole 15. Note that, in FIG. 5, as a representative, the reference numerals relating to the configuration of the movable child seat 5a are shown, and the reference numerals relating to the configurations of the movable child seat 5b and the movable child seat 5c are shown in parentheses.

Each pin 7a, 7b, 7c has a cylindrical shape extending in the vertical direction. Each pin 7a, 7b, 7c is provided with a bolt insertion hole 17 that penetrates in the vertical direction and has a counterbore around the opening on the upper end side in an arrangement corresponding to the screw hole 16 on the inner bottom surface of the hole 15. There is.

In each movable child seat 5a, 5b, 5c, a portion near the lower end of each pin 7a, 7b, 7c is inserted into a hole 15 provided on the upper surface, and in this state, a bolt insertion hole 17 of each pin 7a, 7b, 7c is inserted. The pin fixing bolt 18 passed from above is screwed into the screw hole 16 at the inner bottom of the hole 15 and tightened. As a result, the movable child seats 5a, 5b, 5c have a structure in which the upper end portions of the pins 7a, 7b, 7c project upward from the upper surface of the movable child seats 5a, 5b, 5c.

It should be noted that the pins 7a, 7b, 7c are each pin from the viewpoint of reducing the labor of aligning the axial positions of the plate members 14 when they are inserted into the fitting holes 8a, 8b, 8c. It is preferable that the outer peripheral portion of 7a, 7b, 7c on the upper end side is provided with a tapered surface 19 whose diameter is reduced from the lower side to the upper side.

In the plate member 14, each fitting hole 8a, 8b, 8c is formed by machining. As a result, in the present embodiment, the fitting holes 8a, 8b, and 8c need only be provided by machining not on the main body of the movable mass 2 but on the plate member 14 provided on the lower end side of the movable mass 2. , It is possible to easily realize a configuration in which the movable mass 2 is provided with the fitting holes 8a, 8b, 8c.

When the movable mass 2 is placed on the upper side of the movable child seats 5a, 5b, 5c, the vibration damping device 1 of the present embodiment having such a configuration is provided in the fitting holes 8a, 8b, 8c of the plate member 14. , Pins 7a, 7b, 7c of the corresponding movable child seats 5a, 5b, 5c are fitted. In this state, the movable child seats 5a, 5b, and 5c arranged in the X direction are relative to each other based on the relative arrangement of the fitting holes 8a, 8b, and 8c provided in the plate member 14. Positioning is performed, and the accuracy of the positioning is guaranteed by the accuracy of machining.

Positioning of the movable child seats 5a, 5b, 5c via the plate member 14 is performed in the same manner each time the movable mass 2 is placed on the movable child seats 5a, 5b, 5c. That is, in the positioning of the movable child seats 5a, 5b, 5c via the plate member 14, the movable mass 2 is placed on the movable child seats 5a, 5b, 5c in order to assemble the vibration damping device 1 of the present embodiment. In both cases of placing and returning the jacked-up movable mass 2 to the configuration placed on the movable child seats 5a, 5b, 5c with the implementation of the maintenance method described later. , Will be carried out in the same way.

Further, in the vibration damping device 1 of the present embodiment, when the movable element seats 5a, 5b, 5c are positioned by the plate member 14, the movable elements 13a, 13b, 13c are the magnetic poles of the stator 12. The arrangement spacing in the X direction of each mover seat 5a, 5b, 5c and the movers 13a, 13b, 13c of each mover seat 5a, 5b, 5c so that the arrangement is arranged in an integral multiple of the width. The mounting position of is decided.

As a result, the vibration damping device 1 of the present embodiment fixes the movable elements 13a, 13b, 13c in the linear motor 6 each time the movable mass 2 is placed on the movable element seats 5a, 5b, 5c. The relative positions of the child 12 with respect to the magnetic poles can be aligned in the same manner each time.

As shown in FIGS. 3 and 4, the movable mass 2 has both side edges in the Y direction of the movable mass 2 on both outer sides in the Y direction from both ends of the movable cell seats 5a, 5b, and 5c in the Y direction. The dimension of the movable mass 2 in the Y direction is set so as to project with a certain dimension. Further, the movable mass 2 is a region projecting to both outer sides in the Y direction from the movable child seats 5a, 5b, 5c at both side edges in the Y direction, and is on the lower surface side of the four corners of the movable mass 2. Jack-up points 9 are provided at the points.

As a result, in the vibration damping device 1 of the present embodiment, as shown in FIG. 2, the jacks 20 are arranged at positions directly below the jack-up points 9 on both side edges of the base 3 in the Y direction, and then the jacks 20 are arranged. By extending each jack 20 and pushing up the jack-up point 9 of the movable mass 2 from below, the jack-up process of the movable mass 2 can be performed. Therefore, the vibration damping device 1 of the present embodiment can replace the weight of the movable mass 2 from the movable child seats 5a, 5b, 5c to the jacks 20, and the movable child seats 5a, 5b, 5c. The support of the movable mass 2 can be released.

At this time, as shown in FIG. 2, the jack-up process of the movable mass 2 is performed in a state where the position of the movable mass 2 is arranged close to one end side in the X direction (left side in FIG. 2), for example. The movable child seats 5a, 5b, and 5c can be moved so as to be pulled out from the lower position of the movable mass 2 toward the other end side in the X direction.

At this time, the vibration damping device 1 of the present embodiment is in the X direction of the rail 10 of the guide device 4 according to the work to be performed on the movable child seats 5a, 5b, 5c pulled out from the lower position of the movable mass 2. The length dimension may be set as follows.

The setting of the length dimension of the rail 10 of the guide device 4 in the X direction is roughly classified, and the setting changes according to the following three conditions.

The first condition is that for each movable child seat 5a, 5b, 5c pulled out from the lower position of the movable mass 2, each movable child seat 5a, 5b, 5c itself and the corresponding movable child seats 13a, 13b, 13c, etc. are maintained. The condition is that the movable child seats 5a, 5b, and 5c are removed from the guide device 4 when the work is performed.

In the case of this first condition, the length dimension of the rail 10 of the guide device 4 in the X direction is the dimension of the movable mass 2 in the X direction and the movable child seats 5a, 5b, 5c from below the movable mass 2. It may be set so as to be larger than the sum of the work space required for the work of sequentially pulling out and removing from the guide device 4.

Next, the second condition is that the movable child seats 5a, 5b, and 5c are not removed from the guide device 4 when performing maintenance work, and all the movable child seats 2 can be moved by a single jack-up process. The condition is that maintenance work is performed on the child seats 5a, 5b, and 5c.

In the case of this second condition, the length dimension of the rail 10 of the guide device 4 in the X direction is the dimension of the movable mass 2 in the X direction and the dimension of all the movable child seats 5a, 5b, 5c in the X direction. , The dimension may be set to be larger than the sum of the work space required for the maintenance work by the worker.

Next, the third condition is that the movable child seats 5a, 5b, and 5c are not removed from the guide device 4 when the maintenance work is performed, and the jack-up process of the movable mass 2 is moved toward one end side in the X direction. The condition is that the maintenance work for each of the movable child seats 5a, 5b, and 5c is performed twice according to the arrangement in the X direction.

In the case of this third condition, the length dimension of the rail 10 of the guide device 4 in the X direction is the dimension of the movable mass 2 in the X direction and two of the movable child seats 5a, 5b, and 5c. It may be set so as to be larger than the total dimension of the dimension in the X direction and the work space required for the maintenance work by the operator.

Although the configuration in which the movable mass 2 is supported by the three movable child seats 5a, 5b, and 5c arranged in the X direction is shown, even if the number of movable child seats arranged in the X direction is other than 3. Of course, it's good.

For example, when the vibration damping device of the present disclosure is configured to have (2n + 1) movable child seats (n is a natural number of 1 or more) arranged in the X direction, in the case of the third condition, the guide The X-direction length dimension of the rail of the device is the X-direction dimension of the movable mass, the X-direction dimension of (n + 1) movable child seats, and the work space required for maintenance work by the operator. It may be set so as to be larger than the sum of minutes and dimensions.

Further, when the vibration damping device of the present disclosure has a configuration including (2n) movable child seats (n is a natural number of 1 or more) arranged in the X direction, the guide in the case of the third condition. The X-direction length dimension of the rail of the device is the X-direction dimension of the movable mass, the X-direction dimension of (n) movable child seats, and the work space required for maintenance work by the operator. It may be set so as to be larger than the sum of minutes and dimensions.

The vibration damping device 1 of the present embodiment detects the vibration generated in the structure to be vibration-damped by a sensor (not shown), and the phase when the movable mass 2 is reciprocated in the X direction according to the detected vibration. Since it is the same as the existing linear motor type vibration damping device or the conventionally proposed linear motor type vibration damping device in that the vibration damping function is exhibited by controlling the vibration and the amplitude, the description thereof will be omitted.

As a result, the vibration damping device 1 of the present embodiment can reduce the vibration generated in the structure to be vibration controlled.

At this time, since the vibration damping device 1 of the present embodiment reciprocates the movable mass 2 along the X direction, the movable mass 2 has the movable mass 2 along the X direction due to the change in the acceleration in the X direction. A large inertial force is generated according to the own weight of the. Further, in the vibration damping device 1 of the present embodiment, when the vibration generated in the structure to be damped contains a vibration component in the Y direction, the movable mass 2 is affected by the vibration component in the Y direction. , An inertial force is also generated along the Y direction. Therefore, in the vibration damping device 1 of the present embodiment, the above-mentioned inertial force in the X direction and the inertial force in the Y direction are combined to generate the inertial force in the horizontal direction in the movable mass 2. This inertial force is hereinafter referred to as the inertial force of the movable mass 2.

The inertial force of the movable mass 2 is the frictional force generated between the movable mass 2 and the movable child seats 5a, 5b, 5c and the movable child seats 5a, 5b, 5c via the pins 7a, 7b, 7c. Reportedly. At this time, each pin 7a, 7b, 7c applies the inertial force of the movable mass 2 transmitted from the peripheral wall of each fitting hole 8a, 8b, 8c of the movable mass 2 to the portion near the upper end of each pin 7a, 7b, 7c. , The portion near the lower end of each of the pins 7a, 7b, 7c can be transmitted to the peripheral wall of the pin mounting hole 15 of each of the movable child seats 5a, 5b, 5c. After that, in the inertial force of the movable mass 2 transmitted to each movable child seat 5a, 5b, 5c, the component in the X direction is received by the driving force of the linear motor 6, and the component in the Y direction is transmitted via the guide device 4. It is transmitted to the base 3 and received.

In the vibration damping device 1 of the present embodiment, it is assumed that the inertial force of the movable mass 2 is a combination of the inertial force in the X direction and the inertial force in the Y direction for each of the pins 7a, 7b, and 7c. It may also work from the orientation. On the other hand, since the vibration damping device 1 of the present embodiment has a cylindrical shape in which each pin 7a, 7b, 7c extends in the vertical direction, any inertial force of the movable mass 2 is applied to each pin 7a, 7b, 7c. Even if it acts from the direction, the inertial force of the movable mass 2 can be transmitted to the movable child seats 5a, 5b, 5c by the pins 7a, 7b, 7c without causing a bias according to the direction.

Therefore, in the present embodiment, each bolt 18 used for attaching each pin 7a, 7b, 7c to each movable child seat 5a, 5b, 5c receives the inertial force of the movable mass 2 as a shear load. There is no. Therefore, in the vibration damping device 1 of the present embodiment, the pins 7a, 7b, and 7c can be attached by one bolt 18, and the strength required for the bolt 18 can be suppressed.

The vibration damping device 1 of the present embodiment is not limited to the configuration in which the pins 7a, 7b, and 7c are attached to the movable child seats 5a, 5b, and 5c by one bolt 18. Of course, the pins 7a, 7b, and 7c may be attached by using a plurality of bolts 18. Further, the pins 7a, 7b, 7c may be attached to the movable child seats 5a, 5b, 5c by a fixing method other than using the bolt 18, such as welding.

Further, from the viewpoint of transmitting the inertial force of the movable mass 2, each movable child seat 5a, 5b, 5c is provided with a pin mounting hole 15, and each hole 15 is provided with a lower end of each pin 7a, 7b, 7c. It is preferable to have a configuration in which the side portion is inserted and attached. However, the vibration damping device 1 of the present embodiment is not limited to this configuration, and is configured to fix the lower end side of the corresponding pins 7a, 7b, 7c to the upper surface of each movable child seat 5a, 5b, 5c. Of course, it may be.

The vibration damping device 1 of the present embodiment having the above configuration is described below when the maintenance work of the movable child seats 5a, 5b, 5c and the movable elements 13a, 13b, 13c of the corresponding linear motor 6 is performed. Follow the procedure in.

First, in the vibration damping device 1 of the present embodiment, the movable mass 2 is arranged close to one end side in the X direction, for example, the left side in FIG. If the linear motor 6 can be operated, the movable mass 2 at this time may be moved by the driving force of the linear motor 6. Further, when the operation of the linear motor 6 is stopped, the movable mass 2 may be manually moved by an operator (not shown), or one end side of the vibration damping device 1 of the present embodiment in the X direction. A chain block (not shown) is hung between the fixed portion located at the position and the movable mass 2, and the operator operates this chain block to pull the movable mass 2 toward one end in the X direction and move it. good.

Next, as shown in FIG. 2, in the vibration damping device 1 of the present embodiment, the jack-up process of the movable mass 2 is performed by the jack 20 arranged below each jack-up point 9 of the movable mass 2. As a result, the movable child seats 5a, 5b, and 5c are released from the support of the load of the movable mass 2.

In this state, the maintenance worker pulls out the movable child seats 5a, 5b, 5c from below the movable mass 2 to the other end side in the X direction, and guides the movable child seats 5a, 5b, 5c. It is possible to approach each movable child seat 5a, 5b, 5c itself or each movable child 13a, 13b, 13c for maintenance without removing or removing from 4.

Therefore, the vibration damping device 1 of the present embodiment guides the movable mass 2 to the movable mass 2 when the movable child seats 5a, 5b, 5c and the movable elements 13a, 13b, 13c of the linear motor 6 are maintained. No need to remove from. Therefore, in the vibration damping device 1 of the present embodiment, it is not necessary to separately prepare a storage place for the movable mass 2 for the maintenance of the movable child seats 5a, 5b, 5c and the linear motor 6, and the movable mass 2 is provided. There is no need for a crane to transport it to the storage location. As described above, the vibration damping device 1 of the present embodiment can improve maintainability.

When the maintenance work of each movable child seat 5a, 5b, 5c itself, each movable child 13a, 13b, 13c, etc. is completed, the worker puts each movable child seat 5a, 5b, 5c below the movable mass 2. Return to the position.

Next, the operator operates each jack 20 to lower the jacked-up movable mass 2 and place it on the upper side of each movable child seat 5a, 5b, 5c.

At this time, in the vibration damping device 1 of the present embodiment, positioning pins 7a, 7b, 7c are provided on the movable child seats 5a, 5b, 5c, and the movable mass 2 is a plate member 14 on the lower end side. Since the fitting holes 8a, 8b, 8c are provided in the above, it is possible to easily perform the alignment work of arranging the movable child seats 5a, 5b, 5c at appropriate positions with respect to the movable mass 2. .. Further, in the vibration damping device 1 of the present embodiment, when the movable mass 2 is placed on the movable child seats 5a, 5b, 5c, the stator 12 is provided for each of the movable elements 13a, 13b, 13c in the linear motor 6. The relative positions of the poles with respect to the magnetic poles can be easily aligned as before the start of maintenance work.

Therefore, even with this, the vibration damping device 1 of the present embodiment can be improved in maintainability.

Further, in the vibration damping device 1 of the present embodiment, the pins 7a, 7b, 7c provided in the movable child seats 5a, 5b, 5c and the fitting holes 8a, 8b, 8c provided in the plate member 14 of the movable mass 2 Because it is configured to have With respect to 13c, the effect of aligning the relative positions of the stator 12 with respect to the magnetic poles is also effective when assembling the vibration damping device 1 of the present embodiment.

Therefore, the vibration damping device 1 of the present embodiment can also obtain the effect of improving the workability of the assembly work.

[Second Embodiment]
FIG. 6 is a schematic side view showing a second embodiment of the vibration damping device. FIG. 7 is a schematic side view showing a state in which the movable mass is jacked up by the vibration damping device of FIG. FIG. 8 is a schematic plan view of the vibration damping device of FIG.

In FIGS. 6, 7, and 8, the same components as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted.

The vibration damping device of this embodiment is shown by reference numeral 1a in FIGS. 6, 7, and 8. In the same configuration as that of the first embodiment, three movable elements in which movable masses 2 are arranged in the X direction are arranged. Instead of the configuration supported by the seats 5a, 5b, 5c, the movable mass 2 is supported by one movable child seat 5d.

Further, in the present embodiment, the linear motor 6 is configured to include one mover 13d, and the mover 13d is attached to the lower side of the mover seat 5d.

Further, in the vibration damping device 1a of the present embodiment, similarly to the movable child seats 5a, 5b, 5c (see FIG. 5) in the first embodiment, the movable child seat 5d is above the upper surface of the movable child seat 5d. The movable mass 2 is provided with a plate member 14 integrally on the lower end side, and the plate member 14 is provided with a fitting hole 8d for inserting and fitting the pin 7d from below. It is said that it has a structure.

In the vibration damping device 1a of the present embodiment, in order to suppress the generation of a moment centered on the pin 7d of the movable child seat 5d in the movable mass 2, the movable mass 2 has a fitting hole 8d at the position of the center of gravity. It is preferable that the configuration is provided with. The vibration damping device 1a of the present embodiment has a member or a structure for suppressing the horizontal rotation of the movable mass 2 even if a moment around the pin 7d of the movable child seat 5d is generated in the movable mass 2. It may be configured to be provided.

The vibration damping device 1a of the present embodiment having the above configuration can be used in the same manner as the vibration damping device 1 of the first embodiment to obtain a vibration damping effect of the structure to be vibration controlled.

Further, when the vibration damping device 1a of the present embodiment is maintained, the movable mass 2 is jacked up in the same manner as the vibration damping device 1 of the first embodiment, and the support of the load of the movable mass 2 is released. The procedure including the step of pulling out the movable child seat 5d from the lower side of the movable mass 2 may be performed.

Therefore, the vibration damping device 1a of the present embodiment can obtain the same effect as that of the first embodiment.

The present invention is not limited to each of the above embodiments.

The arrangement, shape, size, and size ratio of each component of the vibration damping devices 1, 1a of each embodiment are for convenience of illustration, and the actual arrangement of each component, It does not reflect the shape, size, or ratio of the size of each component.

In the vibration damping device of the present disclosure, the number of movable child seats arranged in the X direction to support the movable mass may be two or a plurality of four or more.

Of course, various changes can be made without departing from the gist of the present invention.

2 Movable mass 3 Base 4 Guide device 5a, 5b, 5c, 5d Movable child seat 6 Linear motor 7a, 7b, 7c, 7d Pin 8a, 8b, 8c, 8d Fitting hole 9 Jack-up point 12 Stator 13a, 13b, 13c, 13d movable element

Claims (3)

With the base
A unidirectionally extending guide device provided on the base and
A movable child seat held in the guide device so as to be reciprocally movable,
The movable mass placed on the upper side of the movable child seat and
A linear motor that applies a driving force to the movable child seat and the movable mass is provided.
The linear motor includes a stator attached to the upper surface of the base and a mover attached to the underside of the movable child seat.
The movable child seat comprises a pin protruding upward from the upper surface of the movable child seat.
The movable mass is a vibration damping device provided on the lower surface side of the movable mass and provided with a fitting hole into which the pin of the movable child seat is inserted and a jack-up point. The movable mass has a configuration in which both side edges in a direction orthogonal to the reciprocating movement direction of the movable child seat project to both outer sides of the movable child seat.
The vibration damping device according to claim 1, wherein the jack-up point is provided in a region overhanging both outer sides of the movable child seat at both side edges of the movable mass. As the movable child seat, a plurality of movable child seats held so as to be reciprocally movable by the guide device are provided.
The plurality of movable seats are individually provided with pins protruding upward from the upper surface of each movable child seat.
The movable mass has a shape extending in the reciprocating movement direction of each movable child seat, and is provided with a plurality of fitting holes on the lower surface side of the movable mass along the reciprocating movement direction of the movable child seat. The vibration damping device according to claim 1 or 2.

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