JP2002211881A - Base isolation apparatus for crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation apparatus for a crane effective for a traveling crane having a portal crane main body. SOLUTION: A swivel bearing ring 12 formed by an upper ring and a lower ring relatively rotated is provided between the crane main body 1 and the traveling device 2. A lower vertical shaft of a block 18 pivoted on a saddle 11 of the crane main body 1 is supported on a swivel bearing 13 provided in an eccentric position on the upper ring. An automatic restoring mechanism 20 is provided for swivel around the center line C2 of a horizontal lever 19, the base end of which is fitted to the upper ring of the swivel bearing ring 12.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation device for a crane for preventing a large crane from falling off due to an earthquake.

[0002]

2. Description of the Related Art As a crane provided with a seismic isolation device, Japanese Patent Publication No. 63-356 "Overhead traveling crane" is known. This “overhead traveling crane” is shown in FIGS.
As shown in FIG. 5, the crane body 15 having a narrow girder shape is used.
On the horizontal shaft 152 of the saddles 151 on both sides, a track 154 having two running wheels 153 running on a rail 157 is slidably provided one by one, and a gap between the inner surface of the saddle 151 and the facing surface of the truck 154 is provided. In addition, a vibration damping mechanism including a compression spring 155 and a damper 156 parallel to the horizontal shaft 152 is provided.

In a crane of this type having a girder-shaped crane body 150, when an earthquake occurs, only an exciting force acting mainly in a direction perpendicular to the traveling direction acts on the crane body 150 as a dangerous external force. Is attenuated by the action of the compression spring 155 and the damper 156 so as to prevent damage to the wheels and accidents of derailing.

On the other hand, as shown in FIGS. 17 and 18,
In a large container crane, unloader, or the like provided on the ground, the crane main body 1 is generally configured in a gate shape. 17 and 18 show a schematic configuration of the container crane. The portal crane body 1 is provided with traveling devices 2 at four corners.

[0005]

In a traveling crane having such a portal crane main body, a lateral overturning load R along with a lateral excitation force R perpendicular to the traveling direction is generated due to vibration during an earthquake. M, a torsional load S (turning load) from the running direction to the left and right, and a shocking axial load A are applied. Also, when a large portal crane body is used, the height of the center of gravity is very high and the natural period is longer than that of an overhead traveling crane, so the lateral displacement of the portal crane body due to earthquake vibration Also increases. For this reason, even if the conventional vibration damping mechanism shown in FIG. 25 is used for the portal crane body, the stroke amount required to attenuate the lateral excitation force R cannot be obtained, and the overturning moment load M and the twist There is a problem that a damping effect on the load S cannot be obtained. In view of the above, an object of the present invention is to provide a seismic isolation device for a crane that is effective for a traveling crane having a portal crane body.

[0006]

In order to solve the above-described problems, a seismic isolation device for a crane according to the present invention includes a crane main body and a traveling device having a plurality of wheels for traveling the crane main body along a rail. A seismic isolation device provided between the crane body and the traveling device, the coupling mechanism allowing the relative movement of the crane body and the traveling device while the interconnecting the crane body and the traveling device when an earthquake occurs, and A restraining mechanism that maintains a relative positional relationship with each other and is released by seismic force to allow relative movement between them, and an energy absorbing unit that suppresses an increase in relative movement between the crane body and the traveling device during an earthquake And a restoring mechanism for restoring the crane body and the traveling device to a steady positional relationship.

In the above-described seismic isolation device for a crane of the present invention,
Normally, the stationary position relationship between the crane body and the traveling device is maintained by the restraining mechanism. However, when the earthquake occurs, the traveling device is displaced in the lateral direction and the crane body tries to stay by inertia. Is released by the seismic force, the relative movement between the crane body and the traveling device occurs, and the energy associated with the relative movement is absorbed by the energy absorbing means. The relative movement between the crane body and the traveling device is appropriately mitigated by a damper mounted between the two, and thus the seismic isolation function can be performed safely and properly.

The present invention also provides a seismic isolation device for a crane provided between a crane main body and a traveling device having a plurality of wheels for traveling the crane main body along a rail. A slewing bearing ring comprising a lower ring mounted horizontally on the device side and an upper ring concentrically and rotatably engaged with the lower ring is provided at an eccentric position on the upper ring of the slewing bearing ring. A vertical shaft supporting slewing bearing, a crane load support block having a vertical shaft supported by the slewing bearing at a lower portion, and a lower shaft mounted on the crane body so as to pivotally support the block with a horizontal horizontal axis. Saddle and
A horizontal lever whose base end is pivotally supported on an upper ring of the slewing bearing ring via a horizontal horizontal axis, and a horizontal lever which supports a distal end of the horizontal lever so as to be pivotable about a vertical center line of the slewing bearing ring. A horizontal lever turning and restoring mechanism for automatically restoring the lever to a neutral position is provided.

In the above-described seismic isolation device for a crane of the present invention,
The load of the crane body is obtained from the saddle attached to the crane body,
It is transmitted to the traveling device via the slewing bearing and the slewing bearing ring. The axial load, the overturning moment load, and the radial load acting on the crane body due to the earthquake during the operation of the crane are supported by the slewing bearing ring and the slewing bearing on the traveling device.

The oscillating force applied in the radial direction perpendicular to the traveling direction of the traveling device is a slewing bearing erected at a position eccentric from the center of the lower ring of the slewing bearing ring on the traveling device. Together with the horizontal lever so as to rotate about the vertical center line of the slewing bearing ring, and this turning power is automatically generated by a horizontal lever slewing restoring mechanism provided between the horizontal lever and the traveling device. , A buffering effect on the above-described excitation force is performed.

In the seismic isolation device for a crane according to the present invention, the horizontal lever turning / restoring mechanism guides the roller provided at the end of the horizontal lever so as to freely rotate along the turning direction. As described above, the present invention is characterized in that it is constituted by a guide rail that is provided on the traveling device and that is inclined downward toward the middle portion of the rail as a neutral position.

As described above, the guide rail for guiding the roller (or the wheel) at the tip of the horizontal lever mounted on the swivel bearing ring is provided to be inclined downward from both ends toward the rail middle portion as the neutral position. Automatically restores the horizontal lever, which has been turned by the seismic vibration, to the neutral position, as the roller pressed against the guide rail by the gravity of the crane body automatically returns to the intermediate rail position. Will be able to Further, when the horizontal lever pivots due to the seismic vibration, the roller climbs the inclined surface of the guide rail, so that the horizontal lever is restrained from pivoting.

Further, in the seismic isolation device for a crane according to the present invention, the horizontal lever turning / restoring mechanism is constituted by a laminated rubber mounted between a lower surface of the horizontal lever and an upper surface of the traveling device. I have.

As described above, when the horizontal lever turning and restoring mechanism is constituted by the laminated rubber mounted between the lower surface of the horizontal lever and the upper surface of the traveling device, the horizontal lever turns due to earthquake vibration. At this time, the turning movement of the horizontal lever is appropriately suppressed by the spring effect and the damping effect of the laminated rubber itself, and the automatic restoring operation of the horizontal lever to the turning amount zero position (neutral position) is accurately performed. Become like

Furthermore, the seismic isolation device for a crane of the present invention
A coil spring mounted between the lower surface of the horizontal lever and the upper surface of the traveling device,
The horizontal lever is configured by an antifriction guide member interposed between the lever and the traveling device so as to guide the distal end portion along the upper surface of the traveling device in the turning direction of the lever. And

As described above, even when the horizontal lever turning and restoring mechanism is constituted by a coil spring mounted between the lower surface of the horizontal lever and the upper surface of the traveling device, the horizontal lever is moved along the upper surface of the traveling device. Combined with the action of the antifriction guide member such as a roller that guides in the turning direction of the lever,
In the event of an earthquake vibration, the turning movement of the horizontal lever is appropriately elastically suppressed by the coil spring, and the automatic restoration function of the coil spring automatically restores the horizontal lever, which has been turned by the earthquake vibration, to a neutral position. The action is performed properly.

Further, the seismic isolation device for a crane according to the present invention is characterized in that a brake means for braking the turning movement of the horizontal lever is provided on the traveling device. As described above, when the brake means for braking the turning movement of the horizontal lever is provided, an active damping action is performed when receiving the seismic vibration.

Further, the seismic isolation device for a crane of the present invention
A damper (hydraulic vibrator) for suppressing the turning amount of the horizontal lever is provided between the traveling device and the horizontal lever, and the horizontal lever is also provided by adopting such a damper. The effect of suppressing the turning movement of the crane is sufficiently performed, so that it becomes possible to perform an active vibration damping action on the crane body in the event of an earthquake vibration.

The seismic isolation device for a crane of the present invention is a seismic isolation device for a crane provided between a crane main body and a traveling device having a plurality of wheels for traveling the crane main body along a rail. A laminated rubber mounted between the lower surface of the crane body and the center of the traveling device,
A lateral slide mechanism is provided between the lower surface of the crane body and the upper surface of the traveling device at symmetric positions before and after the laminated rubber.

In the above-described seismic isolation device for a crane of the present invention,
When a lateral exciting force is applied to the crane body by an earthquake, the crane body slides in the lateral direction while supporting the bending moment load by the lateral slide mechanism. The sliding force between the traveling device and the traveling device is absorbed by the bending deformation of the laminated rubber, and the crane body returns to the normal position with respect to the traveling device automatically by the restoring force of the laminated rubber.

The seismic isolation device for a crane of the present invention
Further, a damper for suppressing a lateral sliding amount is provided between the crane main body and the traveling device. Lateral movement of the crane body during vibration is appropriately suppressed.

Further, the seismic isolation device for a crane of the present invention includes a vibration detection sensor for detecting vibration of the crane body and the traveling device when an earthquake occurs, and detects vibration of the crane body based on a detection signal from the sensor. A vibration control unit that transmits a control signal for suppressing the vibration, and a driving unit that operates between the crane main body and the traveling device so as to suppress vibration of the crane main body in response to the control signal from the vibration control unit. Are provided.

In the above-described seismic isolation device for a crane of the present invention,
When an earthquake vibration occurs, the vibration of the traveling device is detected by the vibration detection sensor and taken into the vibration control unit,
Since the driving means is controlled so as to insulate the crane main body from the vibration of the traveling device by the control signal from the control unit, the lateral vibration of the crane main body due to the earthquake is actively suppressed.

Further, the seismic isolation device for a crane of the present invention
A crane seismic isolation device provided between the crane body and a traveling device having a plurality of wheels to allow the crane body to travel along a rail, wherein a lower portion of the crane body and an upper center of the traveling device are connected. The invention is characterized in that a vibration damping mechanism that connects the crane body and the traveling device is interposed at positions on both sides of the universal joint mechanism.

In the above-described seismic isolation device for a crane of the present invention,
Normally, the vibration damping mechanisms located on both sides of the universal joint mechanism balance each other to maintain the universal joint block vertically, and in this state, the weight of the crane body is passed through the universal joint mechanism as an axial load. It is transmitted to the traveling device.

Also, the axial load, the overturning moment load, and the radial load acting on the crane body during the earthquake vibration are transmitted between the traveling device and the crane body via the universal joint mechanism. Then, the lateral vibration force applied to the crane body at right angles to the traveling direction by the seismic vibration is attenuated by the respective vibration damping mechanisms on both sides of the universal joint mechanism, while moving the horizontal axis of the universal joint mechanism in the front-rear direction. The rotation of the crane body around the center absorbs the vibration with a large vibration cycle.

Further, if a vibration damping mechanism for connecting the crane main body and the traveling device is interposed at symmetrical positions before and after the universal joint mechanism, respectively, the longitudinal vibration applied to the crane main body due to the seismic vibration is provided. Vibration is also appropriately attenuated.

Further, the universal joint mechanism includes a saddle projecting downward from a lower portion of the crane body, a universal joint block pivotally connected to the saddle at an upper portion thereof by a traveling shaft, and a universal joint block. The lower part of the universal joint mechanism is configured with a horizontal horizontal axis and a lower pivot portion that pivotally attaches to the bearing on the traveling device, so that the structure of the universal joint mechanism is compact and has high strength, and its arrangement is also appropriate. Will be performed.

Further, the seismic isolation device for a crane of the present invention
A crane seismic isolation device provided between a crane main body and a traveling device having a plurality of wheels to cause the crane main body to travel along a rail, wherein a lower surface of the crane main body and a central portion of the traveling device are provided. It is provided that the laminated rubber mounted therebetween and the fall-preventing restraint member interposed between the lower surface of the crane body and the upper surface of the traveling device at both sides of the laminated rubber are provided. Features.

In the above-described seismic isolation device for a crane of the present invention,
Lateral relative displacement generated between the crane body and the traveling device due to the earthquake is absorbed by a spring element and frictional damping due to deformation of the laminated rubber. At the same time, the overturning moment load applied with the lateral radial load is supported by the resistance of the overturning restraint members on both sides, and the restoring force of the laminated rubber allows the restoring action to the zero bending position to be performed accurately. Done.

Further, the seismic isolation device for a crane of the present invention is provided with a trigger mechanism between the crane main body and the traveling device for restraining a relative displacement between the crane body and the traveling device in a horizontal direction. It is characterized in that it is configured to release the restraint of the relative displacement when receiving the above-mentioned excitation force.

In the above-described seismic isolation device for a crane, when an exciting force exceeding a predetermined value is applied to the crane by an earthquake,
When the trigger mechanism is released, the seismic isolation function of the laminated rubber and the overturn prevention restraint members on both sides is exerted. And under normal conditions without earthquakes,
Since the crane body and the traveling device are integrally connected by the trigger mechanism, the rigidity of the entire crane can be maintained.

The seismic isolation device for a crane according to the present invention is a seismic isolation device for a crane provided between a crane main body and a traveling device having a plurality of wheels for traveling the crane main body along a rail, When the traveling device is displaced in the lateral direction by the seismic force when an earthquake occurs, the traveling device includes a tilt guide unit that guides a relative movement of the crane main body and adds a restoring function by gravity. A first slewing bearing ring comprising a lower ring attached to the apparatus in an inclined state and an upper ring concentrically and rotatably engaged with the lower ring; and an upper ring of the first slewing bearing ring. And a lower part mounted so as to have a rotation center line at a position horizontally deviated from the rotation center line of the first slewing bearing ring on the upper surface of the tilt beam. Main body coupling for connecting the upper ring of the second slewing bearing ring to the lower part of the crane main body, the second slewing bearing ring comprising an upper ring concentrically and relatively rotatably engaged with the lower ring. It is characterized by having been constituted with a part.

In the above-described seismic isolation device for a crane of the present invention,
The load of the crane body is divided into a first slewing bearing ring on the traveling device side, an intermediate inclined beam and a second
It is supported via a swivel bearing ring and further via a crane body coupling. When the traveling device moves in the lateral direction together with the rail at the time of the earthquake, the first slewing bearing ring and the second slewing bearing ring have rotational center lines deviated from each other. Attempting to stay causes a lateral displacement relative to the traveling device, and accordingly the inclined beam performs a turning operation,
The crane body is pushed up by cooperation with the second slewing bearing ring on the beam. In this way, the crane main body mainly moves up and down with the reciprocating lateral movement of the traveling device due to the earthquake, whereby the crane main body is lengthened and the seismic isolation function is exhibited.

Further, the seismic isolation device for a crane of the present invention
The crane body coupling portion is characterized by being constituted by a hinge pin type connecting member and a hydraulic cylinder respectively mounted between the upper ring of the second swing bearing ring and the crane body.

As described above, when the upper ring of the second slewing bearing ring and the crane main body are connected by the hinge pin type connecting member and the hydraulic cylinder so that the tilt can be adjusted, the above-mentioned angle is adjusted according to the surface angle of the above-mentioned tilt beam. By adjusting the expansion and contraction of the hydraulic cylinder, the crane main body can be kept horizontal, and the relative relationship of the crane main body to the second swivel bearing ring can be appropriately fixed.

In the seismic isolation device for a crane according to the present invention, the tilting beam is always restrained, and when the earthquake occurs, the restraining mechanism which is released by seismic force and permits the rotation of the tilting beam includes the tilting beam. And a traveling device, and a damper for restricting rotation of the inclined beam is extended between the inclined beam and the traveling device.

As described above, if a restraining mechanism such as a shear pin or a brake is provided between the inclined beam and the traveling device, and the restraining mechanism is released only when an earthquake occurs, the above-described mechanism is always used. Since the inclined beam is fixed, a stable operation similar to that of the conventional crane device is performed. When the restraining mechanism is released by the seismic force and the inclined beam is reciprocated, a damper for suppressing the rotation of the inclined beam is provided, so that the relative movement between the crane body and the traveling device is provided. The seismic energy is absorbed while properly mitigating the earthquake.

Further, the seismic isolation device for a crane of the present invention
A seismic isolation device for a crane provided between a crane body and a traveling device having a plurality of wheels so that the crane body travels along a rail. A spring mechanism is provided for elastically retaining the positional relationship of the crane body, and when the traveling device vibrates in the lateral direction due to the occurrence of an earthquake, the crane body tries to stay at the original position due to the inertial force acting on the crane body. A movable connection mechanism for connecting the two while permitting relative displacement with respect to the traveling device, and a damper for suppressing relative displacement between the crane body and the traveling device performed via the spring mechanism. The movable coupling mechanism is interposed between the crane body and the traveling device, and the movable coupling mechanism is concentrically rotated relative to the lower ring and the lower ring mounted horizontally on the traveling device side. A first slewing bearing ring comprising an upper ring operably engaged, a horizontal beam provided integrally with the upper ring of the first slewing bearing ring, and rotation of the first slewing bearing ring on the upper surface of the horizontal beam. A second slewing bearing ring comprising a lower ring mounted so as to have a rotation center line at a position deviated horizontally from the center line, and an upper ring concentrically and relatively rotatably engaged with the lower ring; It is characterized in that it is provided with a crane body connecting portion for connecting an upper ring of the second slewing bearing ring to a lower portion of the crane body.

In the above-described seismic isolation device for a crane, a horizontal beam is provided in place of the above-mentioned inclined beam in the movable connection mechanism for connecting the crane body and the traveling device. The relative movement that occurs between the traveling device and the crane body during the occurrence of an earthquake due to the cooperation between the bearing ring and the second slewing bearing ring is performed only in a horizontal plane. The stationary positional relationship between the traveling device and the crane body is held by a spring mechanism, and the relative movement between the traveling device and the crane body performed via the spring mechanism when an earthquake occurs is reduced by a damper. In this way, the seismic isolation function for the crane body can be properly performed while absorbing the seismic energy.

Also in this case, the load of the crane body is supported via the first slewing bearing ring on the traveling device side, the intermediate horizontal beam and the second slewing bearing ring on the crane body side, and further connected to the crane body. It is supported without any trouble through the part.

Further, in the seismic isolation device for a crane according to the present invention, the restraint mechanism for always restraining the relative displacement of the horizontal beam with respect to the traveling device and releasing the relative displacement when the earthquake occurs by seismic force allows the relative displacement. It is characterized by being installed between the horizontal beam and the traveling device.

As described above, if a restraining mechanism such as a shear pin or a brake is provided between the horizontal beam and the traveling device, and the restraining mechanism is released only when an earthquake occurs, the above-described mechanism is always used. Since the horizontal beam is fixed, the same stable operation as in the conventional crane device is performed.

[0044]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows the present invention between one of traveling devices provided at four corners of a crane body of a portal crane and the crane body. 1 is a side view showing a state in which a crane seismic isolation device as a first embodiment of the present invention is mounted,
2 is a view taken along the line II-II of FIG. 1, FIG. 3 is a view taken along the line III-III of FIG. 1, FIG. 4 is a sectional view taken along the line IV-IV of FIG. 3, and FIG.
FIG. 6 is an enlarged view taken in the direction of arrow V, and FIG. 6 is a view taken in the direction of arrow VI-VI in FIG.

The crane provided with the seismic isolation device of this embodiment is also configured as a portal crane as shown in FIGS. 17 and 18, and has a portal crane main body 1 and a traveling device 2 at four corners thereof. In the meantime, as shown in FIG.
Is provided.

That is, as shown in FIG. 1, the traveling device 2 is composed of four sets of trucks 4 each having two wheels 5 running on rails 3 and two adjacent sets of tracks 4 and 4. 7
And two upper equalizer beams 6 connected by a shaft 9 and two lower equalizer beams 6 connected together by a shaft 9. The upper equalizer beam 8 is connected between the upper equalizer beam 8 and the crane main body 1. A seismic isolation device 10 according to a first embodiment of the present invention is mounted.

In FIG. 1, C1 indicates the center line of the upper equalizer beam 8, and C2 indicates the seismic isolation device 10 biased toward the center of the crane body 1 by a certain distance from the center line C1.
3 shows a mounting position on the upper equalizer beam 8 side.

The traveling device 2 of the portal crane has various types of combinations with different numbers of wheels from those described above, and a truck 4 with two wheels is provided at each corner of the crane body 1 by one set. In some cases. In each embodiment of the present invention, the seismic isolation is applied to each of these types of traveling devices 2 so as to connect between the uppermost equalizer beam or truck of the traveling device 2 and the saddle 11 on the crane main body 1 side. The device 10 is equipped.

As shown in FIGS. 1 to 4, the seismic isolation device 10 has a vertical center line C on the upper equalizer beam 8 of the traveling device 2.
A lower ring 31 mounted horizontally about 1;
The lower ring 31 is provided with a slewing bearing ring 12 comprising an upper ring 32 concentrically and rotatably engaged via bearings 33, 34 for axial load and moment load, and a bearing 35 for radial load. I have.

The upper ring of the slewing bearing ring 12
As shown in FIGS. 5 and 6, a lower vertical shaft 17 of a crane load supporting block 18 is supported on a vertical shaft supporting slewing bearing 13 provided along the center line C1 at an eccentric position on 32. The block 18 is pivotably supported by a saddle 18 attached to the crane main body 1 by a horizontal horizontal shaft 16. In this way, the traveling device 2 is pivotally supported on the crane main body 1 via the horizontal horizontal shaft 16, as shown in FIG.

Further, the seismic isolation device 10 includes a slewing bearing ring 12.
Horizontal axis in the direction crossing the center line C2 along the diameter direction of
14 is supported via a bracket 15 on an upper ring 32,
It has a horizontal lever 19 supported by the horizontal axis 14. Then, rotate the tip of the horizontal lever 19 to the swing bearing ring.
A horizontal plane for automatically restoring the horizontal lever 19 to a neutral position (a position along the crane traveling direction) while supporting the tip of the horizontal lever 19 so as to pivot with the upper ring 32 about the 12 vertical center lines C2. Lever rotation restoration mechanism 20
Are provided as shown in FIGS.

That is, a roller (including the case of a wheel) 24 which can freely rotate along the turning direction about the turning center line C2 of the horizontal lever 19 is provided at the tip of the horizontal lever 19, and A guide rail 25 is provided on the upper equalizer beam 8 of the traveling device 2 so as to guide the guide rail 24, and the guide rail 25 is provided at a downward slope (see FIG. 2) toward the middle of the rail as a neutral position. I have.

The upper ring 32 of the slewing bearing ring 12
An auxiliary drive type (or non-drive type) hydraulic damper 21 is provided between the
A drive unit 21a for the hydraulic damper 21 is provided.

Further, the upper ring of the slewing bearing ring 12
At 32, a brake plate 22 is provided on the side opposite to the horizontal lever 19, and a removable brake 23 is provided on the brake plate 22. Thus, brake means for braking the turning movement of the horizontal lever 19 is configured. Have been.

Note that the slewing bearing 13 is
It is also possible to replace the small-sized slewing bearing ring with the slewing bearing ring and to support the longitudinal axis portion 17 of the load support block 18 with the slewing bearing ring.

Further, the horizontal lever turning and restoring mechanism 20 is replaced with a combination structure of the roller 24 and the guide rail 25, and a vibration as shown in FIG. 7, which is generally used to reduce the seismic vibration of the building. Horizontal rubber 19 with laminated rubber 26 for damping
And a configuration provided between the lower surface of the equalizer beam 8 and the upper surface of the equalizer beam 8 can be adopted. Further, a coil spring can be used instead of the laminated rubber 26, and restoring means having any other configuration may be used.

When a coil spring is used in place of the laminated rubber 26, the horizontal lever 19 is guided so that the distal end of the horizontal lever 19 is guided along the upper surface of the traveling device 2, that is, the upper surface of the equalizer beam 8. A roller or a slide bearing member as a friction reducing guide member is used between the lower surface of 19 and the upper surface of the equalizer beam 8.

The seismic isolation device 10 described above holds the brake plate 22 locked by the brake 23 during operation of the crane,
Release the brake 23 when the crane operation is stopped and seismic isolation device 10
Can be maintained in an operable state. It is preferable that the brake 23 can be unlocked by the brake 23 based on an earthquake detection signal from a vibration detection sensor (not shown) even during operation of the crane.

The load of the portal crane body 1 is transmitted from the saddles 11 at the four corners of the portal crane body 1 to the load transmitting blocks 18 and
The power is transmitted to the traveling device 2 including the equalizer beam 8 via the slewing bearing 13 and the slewing bearing ring 12.

During the operation of the crane, the respective exciting forces of the axial load A, the overturning moment loads M and M ', and the radial load R acting on the portal crane body 1 due to the seismic vibration are also changed. And slewing bearing
13 will be absorbed.

At this time, an exciting force R applied in a radial direction perpendicular to the rail 3 is applied to the swing bearing ring of each traveling device 2.
The slewing bearing 13 eccentric from 12 acts to rotate about the center of the slewing bearing ring 12 together with the horizontal lever 19, and this turning force is applied to the horizontal lever slewing provided between the horizontal lever 19 and the traveling device 2. The buffer is suppressed by being suppressed by the restoration mechanism 20.

The horizontal lever rotation restoring mechanism 20 is shown in FIGS.
A roller 24 provided at the end of the horizontal lever 19 shown in FIG.
When the horizontal lever 19 is turned, the roller 24 moves up and down the guide rail 25 surface when the horizontal lever 19 turns, thereby suppressing the moving force, and automatically moving to the intermediate position of the guide rail 25 by the gravity of the crane. Return to move.

The horizontal lever rotation restoring mechanism 20 is similar to that shown in FIG.
In the case where the horizontal rubber 19 is constituted by the laminated rubber 26, the moving force of the horizontal lever 19 is suppressed by the spring element of the laminated rubber 26 itself, the friction damping element, and the Will be restored. Further, when a coil spring is used instead of the laminated rubber 26, the movement of the horizontal lever 19 is suppressed by the spring element of the coil spring itself, and then the horizontal lever 19 is automatically restored to the rotation amount zero position.

The rotation of the horizontal lever 19, which is shocking due to an earthquake, can also be suppressed by the auxiliary hydraulic damper 21. By using the drive-type hydraulic damper 21, active control of earthquake vibration can be achieved. Shake can be performed. Further, the provision of the brake means 22 and 23 for restricting the turning movement of the horizontal lever 19 provides a more accurate vibration control effect against an earthquake.

The above-mentioned action is generated independently at the four traveling devices 2 at the four corners of the portal crane main body, so that the seismic force acting on the portal crane can be safely absorbed by each traveling device 2. become.

Further, with this configuration, it is possible to provide a compact seismic isolation mechanism that can safely absorb the large horizontal torsion of the large portal crane body 1.
Further, since the seismic isolation device 10 is configured as an independent mechanism between the traveling device 2 and the saddle 11, inspection, adjustment, and repair can be easily performed.

Next, a seismic isolation device for a crane according to a second embodiment of the present invention will be described. FIG.
FIG. 9 is a view taken along the line IX-IX in FIG.

In the second embodiment, in a traveling type portal crane having the same portal-type crane body 1 and traveling device 2 as in the first embodiment, the distance between the crane body 1 and the traveling device 2 is increased. The seismic isolation device 10 to be interposed in is configured as follows.

That is, the laminated rubber is placed between the lower surface of the crane main body 1 and the center of the equalizer beam 8 of the traveling device 2.
A horizontal slide mechanism 37 is mounted between the lower surface of the crane main body 1 and the upper surface of the equalizer beam 8 at symmetric positions before and after the laminated rubber 36,
A hydraulic damper 38 for damping vibration is provided between the crane body 1 side slide portion and the equalizer beam 8.

As the laminated rubber 36, a laminated rubber having a necessary height and diameter is used so as to cope with a lateral displacement generated between the crane main body 1 and the traveling device 2 during an earthquake vibration.

The horizontal slide mechanism 37 has a T-shaped rail 39 fixedly arranged on the equalizer beam 8,
It is composed of four upper and lower rollers 41 which are attached to a pair of saddles 40 extending from the crane main body 1 along both sides of the rail 39 and rotate in contact with the upper and lower surfaces of the T-shaped rail 39, The device 38 is provided between the saddle 40 and the equalizer beam 8 in the lateral direction. Further, a drive unit 38a for the hydraulic damper 38 is provided.

In the above-described second embodiment, when a lateral exciting force R is applied to the crane by an earthquake, the crane body 1 moves in the lateral direction while absorbing the bending moment load M by the pair of lateral slide mechanisms 37. Slide to.

At this time, the mutual sliding force is
The crane body 1 and the traveling device 2 are automatically restored to the zero slide position by the restoring force of the laminated rubber 36. Also, at this time, the hydraulic damper
38 work in parallel to attenuate each other's sliding force. Other functions and effects are the same as those of the first embodiment.

Next, a control system provided in the seismic isolation device for a crane according to the first and second embodiments will be described. As shown in FIG. 10, the traveling device 2 according to the first and second embodiments is used. Side and / or crane body 1
And a drive unit 21a (FIG. 1) for the hydraulic damper 21 or a drive unit 38a (FIG. 8) for the hydraulic damper 38 according to the detection value of the vibration detection sensor 42 mounted on the side. A vibration control unit 43 for controlling a drive unit of the wheels 24 is provided.

In each of the seismic isolation devices of the first and second embodiments described above, the vibration caused by the seismic vibration between the traveling device 2 and the crane main body 1 is detected by the vibration detection sensor 42 and taken into the vibration control unit 43. By controlling the drive units 21a and 38a to suppress the speed displacement by the vibration control unit 43, the lateral vibration of the portal crane caused by the earthquake can be actively attenuated, and the derailment or the like can be prevented.

Next, a seismic isolation device for a crane according to a third embodiment of the present invention will be described. FIG. 11 is a side view, FIG. 12 is a sectional view taken along the line XII-XII of FIG. 11, and FIG. It is XIII-XIII arrow sectional drawing.

Also in the third embodiment, traveling devices 2 are provided at the four corners of the crane body 1 of the portal crane, as in the above-described embodiments. That is, as shown in FIG. 11, each traveling device 2 includes four sets of trucks 4 each having two wheels 5 traveling on rails 3.
And two adjacent tracks 4 and 4 connected by a shaft 7
The lower equalizer beam 6 includes a pair of lower equalizer beams 6 and an upper equalizer beam 8 in which two lower equalizer beams 6 are connected to each other via a shaft 9, and is provided between the upper equalizer beam 8 and the crane main body 1 according to the present embodiment. Seismic isolation device 10
Is installed.

As shown in FIGS. 11 to 13, the seismic isolation device 10 is a universal joint mechanism for connecting the lower part of the crane body 1 and the center of the equalizer beam 8 at the upper part of the traveling device 2.
A compression spring 113 and a hydraulic damper 11 serving as a vibration damping mechanism 112 for connecting the crane main body 1 and the traveling device 2 at positions on both sides of the universal joint mechanism 111, respectively.
It is configured with four. The vibration damping mechanism 112
Other examples include an elastic rubber type and a hydraulic cylinder type, and any type can be used.

The universal joint mechanism 111 includes a saddle 115 projecting downward from the lower portion of the crane main body 1 and a universal joint block 1 having an upper portion pivotally connected to the saddle 115 by a support shaft 117 in the traveling direction.
19, and a lower pivot portion that pivotally connects a lower portion of the block 119 to a bearing 116 on the traveling device 2 with a horizontal horizontal axis 118. The support shaft 117 may be configured as a horizontal horizontal axis, and the horizontal horizontal shaft 118 may be configured as a support shaft in the traveling direction.

In the crane with the seismic isolation device 10 described above, the vibration damping mechanism 1 provided on both sides of the universal joint mechanism 111 is normally used.
12 balance each other to maintain the universal joint block 119 vertically, and in this state, the weight of the crane is reduced to the axial load A.
From the four corners of the crane main body 1 via the universal joint mechanism 111 to the traveling device 2.

The crane main body 1 operating due to earthquake vibration
The axial load A, the overturning moment load M, and the radial load R acting on the crane body 1 are also transmitted between the traveling devices 2 and the crane body 1 via the universal joint mechanism 111.

At this time, the vibrating force of the radial load R and the axial load A applied to the crane in a lateral direction perpendicular to the rail 3 by the seismic vibration is caused by a compression spring as a vertical vibration damping mechanism 112 on each traveling device 2. 113 and hydraulic damper 11
While being attenuated by the elastic resistance of 4, the universal joint block 119 is rotationally displaced around the support shaft 117 parallel to the traveling direction, and is absorbed as vibration having a large vibration cycle.

At this time, the relative displacement in the lateral direction between each traveling device 2 and the crane body 1 is determined by the universal joint mechanism 111.
Is absorbed by the inclination of the crane body 1 about the support shaft 117, and displacement absorption and position holding are provided by the vertical expansion and contraction of the compression spring 113 and the hydraulic damper 114 of the vibration damping mechanism 112. For this reason, it becomes possible to safely absorb and attenuate the seismic vibration with a large displacement amount of the seismic isolation device 10 against the vibration having a large natural period of the portal crane due to the seismic vibration.

As shown in FIGS. 17 and 18, when different radial loads R are applied to the traveling devices 2 at the four corners of the crane main body 1 and the torsion load S is applied to the crane main body 1, the above-described operation is performed. The above-described action occurs independently in each of the traveling devices 2, so that the seismic isolation device 10 operates in each of the traveling devices 2 in the front-rear and left-right directions with different amounts of displacement, and applies the torsional load S to each traveling device. It can be safely absorbed on the device 2.

Further, the spring and the damper are connected to the universal joint mechanism 11.
By arranging them at symmetrical positions before and after 1, the same effect can be obtained for seismic vibration in the running direction. Also, according to the seismic isolation device having this configuration, each hydraulic damper 114
It is also possible to perform active vibration suppression for seismic vibration by configuring so that adjustment control can be performed.

Further, with this configuration, it is possible to provide a seismic isolation device that can safely absorb a large horizontal turning twist of the large portal crane body 1 with a compact mechanism. Further, the seismic isolation device 10 includes the traveling device 2 and the crane body 1.
Also, there is an advantage that inspection, adjustment, and repair can be easily performed because the mechanism is configured as an independent mechanism.

Next, a seismic isolation device for a crane according to a fourth embodiment of the present invention will be described. FIG. 14 is a side view, FIG. 15 is a sectional view taken along the line XV-XV in FIG. 14, and FIG.
FIG. 4 is a sectional view taken along the line XVI-XVI of FIG.

In the fourth embodiment as well, as shown in FIG. 14, traveling devices 2 are provided at the four corners of the crane body 1 of the portal crane, similarly to the above-described embodiments. That is, as shown in FIG. 14, each traveling device 2 has four sets of trucks 4 each having two wheels 5 running on rails 3 and two sets of adjacent tracks 4,
2 sets of lower equalizer beams 6 connected by a shaft 7
And an upper equalizer beam 8 in which two sets of lower equalizer beams 6 are connected by a shaft 9. The seismic isolation device 10 of this embodiment is mounted between the upper equalizer beam 8 and the crane main body 1. Have been.

As shown in FIGS. 14 to 16, the seismic isolation device 10 includes a laminated rubber 211 mounted between the lower surface of the crane main body 1 and the center of the traveling device 2 (the center of the equalizer beam 8). Compression springs 212 interposed between the lower surface of the crane main body 1 and the upper surface of the equalizer beam 8 at positions on both sides of the laminated rubber 211, respectively, as a fall-preventing restraining member.
It is configured with and.

Further, a trigger mechanism 213 is provided between the crane body 1 and the traveling device 2 for restraining the relative displacement between the two in the horizontal direction. As the trigger mechanism 213, there are a shear pin type, a holding brake type, a wedge pin type, and the like, and a cam roller type released by an earthquake detection sensor can be used.

As the laminated rubber 211, one having a height and a diameter sufficient to cope with a large lateral displacement generated between the crane main body 1 and the traveling device 2 during an earthquake vibration is used.

In the crane with the seismic isolation device 10 described above, the horizontal force is normally maintained by the trigger mechanism 213, and the compression springs 212 provided on both sides of the laminated rubber 211 balance each other to dispose the laminated rubber 211. Maintain neutral left and right.

In this state, the weight of the crane is set as the axial load A from the four corners of the portal crane main body 1 as the axial load A.
It is transmitted to the traveling device 2 via 1 and the compression spring 212. Similarly, the respective exciting forces of the axial load A, the overturning moment load M, and the radial load R, which newly act on the portal crane in operation due to the earthquake vibration, also travel through the laminated rubber 211 and the compression springs 212 on both sides. It will be transmitted between the device 2 and the portal crane body 1.

When a lateral exciting force exceeding a predetermined value is applied to the portal crane due to the earthquake, the trigger mechanism 213 is released, and a lateral load generated by a radial load R between the crane main body 1 and the traveling device 2. Is absorbed by the spring element due to the deformation of the laminated rubber 211 and the frictional damping. At the same time, the overturning moment load M applied with the radial load R in the lateral direction is supported by the resistance of the compression springs 212 on both sides, and the restoring force of the laminated rubber 211 and the compression springs 212 returns to the zero bending position. Done.

When an exciting force is applied to the crane in the traveling direction due to an earthquake, the relative displacement in the traveling direction generated between the crane body 1 and the traveling device 2 is
It is absorbed by the slip between the rail and the rail 3 and the flexural deformation and restoring force of the laminated rubber 211 in the running direction, and acts to return to the zero flexure position. For this reason, the large-cycle vibration generated in the portal crane due to the earthquake is generated by the laminated rubber 211 and the compression spring 212.
Can be safely absorbed and attenuated with a large displacement amount.

The above-described action occurs independently at the four corners of each traveling device 2 at the four corners of the portal crane main body 1, so that the seismic force acting on the portal crane is applied to each traveling device 2.
Above can be safely absorbed. By applying different radial loads R, the torsion load S is applied to the crane body 1.
Is applied, the above-described action is performed in each traveling device 2, and the laminated rubber 211 and the compression spring 212 operate independently and longitudinally with different displacement amounts, respectively, to move the torsional load S in each traveling device. It can be safely absorbed on the device 2.

Further, in the seismic isolation device having this configuration, the vibration damping effect can be further enhanced by adding a hydraulic damper in the traveling direction or the lateral direction between the crane body 1 and the traveling device 2. is there.

Further, with this configuration, it is possible to provide a seismic isolation device that can safely absorb a large horizontal turning twist of the large portal crane body 1 with a compact mechanism. Further, the seismic isolation device 10 includes the traveling device 2 and the crane body 1.
And a simple mechanism independent of the
Adjustment and repair can be performed easily.

As the overturn prevention restraining members disposed on both sides of the laminated rubber 211, a link type one can be used instead of the compression spring 212. That is, the upper end of the link whose lower end is pivotally supported on the equalizer beam 8 by a pin in the front-rear direction is connected to the upwardly projecting arc-shaped guide hole of the bracket mounted on the lower surface of the crane body 1 by the pin in the front-rear direction. A link mechanism that supports the shaft can also be used.

Next, a seismic isolation device for a crane as a fifth embodiment of the present invention will be described. FIG. 19 is a perspective view showing the schematic structure, FIG. 20 is a side view thereof, and FIG.
FIG. 22 is a side view showing a modification of the main part of FIG.

The crane provided with the seismic isolation device of this embodiment is also configured as a portal crane as shown in FIGS. 17 and 18, and has a portal crane main body 1 and traveling devices 2 at its four corners. Between them, a seismic isolation device 10 is provided as shown in FIGS.

That is, as shown in FIG. 20, the traveling device 2 has four wheels 5 each having two wheels 5 traveling on the rail 3.
Tracks 4, two sets of lower equalizer beams 6 connecting two sets of adjacent tracks 4, 4 by an axis 7, and an upper equalizer beam 8 connecting two sets of lower equalizer beams 6, 6 by an axis 9. A seismic isolation device 10 according to a fifth embodiment of the present invention is mounted between the upper equalizer beam 8 and the crane main body 1.

In the present embodiment, a first slewing bearing ring 51 is mounted on a base member 61 pivotally connected to the center of the upper equalizer beam 8 with a horizontal axis 50 via a base member 51a having an inclined support surface. It is provided in an inclined state. First
The slewing bearing ring 51 has the same structure as the slewing bearing ring 12 shown in FIG. 4. The lower ring of the first slewing bearing ring 51 is fixed to a base member 51a, and the upper bearing of the slewing bearing ring 51 is an inclined beam. Fixed to 60.

The rotation center lines C2 of the upper and lower rings of the first rotation bearing ring 51 which can relatively rotate are inclined, and have a rotation center line C1 at a position deviated horizontally from the rotation center line C2. A second slewing bearing ring 52 having the same structure as the first slewing bearing ring 51 is provided on the upper surface of the inclined beam 60. That is, the lower ring of the second slewing bearing ring 52 is fixed to the upper surface of the inclined beam 60, and the upper ring of the bearing ring 52 is provided with a mounting plate.
52a is fixed.

A hinge pin type connecting member 16 including a spherical bearing 16a and a plurality of hydraulic cylinders 54 serve as a crane main body connecting portion for connecting the upper ring of the second slewing bearing ring 52 to the lower portion of the crane main body 1 via a mounting plate 52a. Are provided. Each of the hydraulic cylinders 54 absorbs a change in the surface angle during rotation of the inclined beam 60 about the rotation center line C2 by expanding and contracting according to a detection signal from the inclined beam rotation angle detection sensor 56. ing. Each hydraulic cylinder 54 supports a moment load in the lateral direction and the traveling direction, and transfers the moment load between the crane main body 1 and the traveling device 2.

A shear pin 53 as a restraining mechanism is provided between the inclined beam 60 and the base member 61, and the crane main body 1 and the traveling device 2 are always maintained in a steady relative positional relationship by the shear pin 53. In the event of an earthquake, the shear pin 53 is released by the seismic force to release the crane body 1 and the traveling device 2
Is allowed, the function of the seismic isolation device 10 is exerted as described later.

In addition, between the inclined beam 60 and the base member 61, the crane main body 1 and the traveling
An oil damper 55 that absorbs kinetic energy while restricting relative movement with the oil pump is mounted.

In the above-described seismic isolation device for a crane of the present embodiment, the load of the crane body 1 is controlled by the first swing bearing ring 51 on the traveling device 2 side, the intermediate inclined beam 60 and the second swing bearing on the crane body 1 side. It is supported via a bearing ring 52 and further via a hinge pin type connecting member 16 as a crane body connecting portion and a hydraulic cylinder 54.

When the shear pin 53 is cut off at the time of the earthquake and the traveling device 2 moves laterally together with the rail 3 as shown by an arrow m in FIG. 19, the first slewing bearing ring 51 and the second slewing bearing ring 52 Have a rotational center line offset from each other, the crane body 1 tends to stay due to the inertial force and relatively shifts with respect to the traveling device 2, whereby the inclined beam 60 is indicated by an arrow n in FIG. As shown in FIG.
In cooperation with the second slewing bearing ring 52 on 60, the crane main body 1 is pushed up. In this way, since the crane main body 1 mainly moves up and down with the reciprocating lateral movement of the traveling device 2 due to the earthquake, a restoring force due to gravity acts on the crane main body 1, whereby the crane main body 1 is prolonged.

Since the upper ring of the second swing bearing ring 52 and the crane main body 1 are connected to each other by the hinge pin type connecting member 16 and the hydraulic cylinder 16a so that the tilt can be adjusted, the hydraulic pressure can be adjusted according to the surface angle of the tilt beam 60. By adjusting the expansion and contraction of the cylinder 54, the crane main body 1 can be kept horizontal, and the relative relationship of the crane main body 1 to the second swivel bearing ring 52 can be appropriately fixed.

Further, a restraining mechanism as a sheer pin (or a brake) 53 is provided between the inclined beam 60 and the traveling device 2 so that the restraining mechanism is released only when an earthquake occurs. Since the inclined beam 60 is always fixed, a stable operation similar to that of the conventional crane device is performed. When the restraining mechanism is released by the seismic force and the reciprocating rotation of the inclined beam 60 is performed, an oil damper 55 that absorbs kinetic energy while suppressing the rotation of the inclined beam 60 is provided. The seismic energy can be absorbed while appropriately relaxing the relative movement between the crane body 1 and the traveling device 2.

In the modification of the fifth embodiment shown in FIG. 22, the second swivel bearing ring 52 is mounted horizontally on the inclined beam 60 via the base member 52b having a bottom surface. The rest of the structure is the same as that of the device shown in FIG. 20, and substantially the same operation and effect as those of the device are obtained.

Next, a seismic isolation device for a crane according to a sixth embodiment of the present invention will be described. FIG. 23 is a perspective view showing a main part thereof. It is configured as a portal crane as shown in FIG. 17 and FIG.
A seismic isolation device 10 is provided between the four corners and the traveling device 2 as shown.

That is, as shown in FIG. 23, the traveling device 2 has four wheels 5 each having two wheels 5 traveling on the rail 3.
Tracks 4, two sets of lower equalizer beams 6 connecting two sets of adjacent tracks 4, 4 by an axis 7, and an upper equalizer beam 8 connecting two sets of lower equalizer beams 6, 6 by an axis 9. A seismic isolation device 10 according to a sixth embodiment of the present invention is mounted between the upper equalizer beam 8 and the crane main body 1.

In the present embodiment, a first slewing bearing ring 51 is provided in a horizontal state on a base member 61 pivotally mounted on the center of the upper equalizer beam 8 with a horizontal axis 50. The first slewing bearing ring 51 has the same structure as the slewing bearing ring 12 shown in FIG. 4, and the lower ring of the first slewing bearing ring 51 is fixed to the upper surface of the base member 61, The bearing is fixed to the horizontal beam 62.

The rotation center line C2 of the upper ring and the lower ring of the first rotation bearing ring 51 which can be relatively swung is vertical, and the rotation center line C1 is shifted from the rotation center line C2 in the horizontal direction. A second slewing bearing ring 52 having the same structure as the first slewing bearing ring 51 is provided on the upper surface of the horizontal beam 62. That is, the lower ring of the second swing bearing ring 52 is fixed to the upper surface of the horizontal beam 62, and the mounting plate 52a is fixed to the upper ring of the bearing ring 52.

An appropriate crane body coupling portion such as a bolt and nut for coupling the upper ring of the second swing bearing ring 52 to the lower portion of the crane body 1 via the mounting plate 52a is provided.

A shear pin (or brake) 53 as a restraining mechanism is provided between the horizontal beam 62 and the base member 61, and the crane body 1 and the traveling device 2 are always in a constant relative positional relationship by the shear pin 53. Although it is held, it is released by the shear pin 53 being cut by the seismic force when an earthquake occurs, and the relative movement between the crane main body 1 and the traveling device 2 is allowed, so that the function of the seismic isolation device 10 is exerted as described later. It has become so.

When the seismic isolation device 10 is operated, the crane main body 1 and the traveling device 2 are located between the horizontal beam 62 and the base member 61.
A viscous damper 55 that absorbs kinetic energy while regulating the relative movement of the viscous member is mounted.

In this way, when the traveling device 2 vibrates laterally during the occurrence of an earthquake, the crane body 1 and the traveling device 2 try to stay at the original position due to the inertial force acting on the crane body 1. A movable connecting mechanism for connecting the crane main body 1 to the traveling device 2 while allowing the relative displacement of the crane main body 1 and the first slewing bearing ring 51, the horizontal beam 62 and the second slewing bearing ring 52, and a crane body connecting portion. In the sixth embodiment, a spring mechanism (coil spring) 63 for elastically holding both the crane body 1 and the traveling device 2 in a steady positional relationship is provided in the sixth embodiment. It is mounted between the base member 1 and the base member 61.

In the sixth embodiment described above, the crane body 1
Since the horizontal beam 62 is provided in place of the inclined beam 60 in the above-described fifth embodiment in the movable connection mechanism that connects the vehicle and the traveling device 2, the horizontal beam 62 and the upper and lower first slewing bearing rings 51 and Two-slewing bearing ring 52
The relative movement that occurs between the traveling device 2 and the crane main body 1 at the time of the occurrence of an earthquake due to the cooperation of the above-mentioned operation is performed only in the horizontal plane. The stationary positional relationship between the traveling device 2 and the crane body 1 is held by a spring mechanism 63, and the relative movement between the traveling device 2 and the crane body 1 performed via the spring mechanism 63 when an earthquake occurs is as follows. The vibration is damped by the viscous damper 55, and thus the seismic isolation function for the crane main body 1 is properly performed while absorbing the seismic energy.

Also in this embodiment, the load of the crane body 1 is supported by the first slewing bearing ring 51 on the traveling device 2 side, the intermediate horizontal beam 62 and the second slewing bearing ring on the crane body 1 side. 52 and further via the crane body connecting portion without any trouble.

Further, since a restraining mechanism such as a shear pin (or a brake) 53 is provided between the horizontal beam 62 and the traveling device 2, the restraining mechanism is released only when an earthquake occurs. Since the horizontal beam 62 is fixed at all times, a stable operation similar to that of the conventional crane device is performed.

[0124]

As described above, according to the seismic isolation device for a crane of the present invention, the following effects can be obtained. (1) Normally, the stationary position relationship between the crane body and the traveling device is maintained by the restraining mechanism, but when the earthquake occurs, the traveling device is displaced in the lateral direction and the crane body tries to stay by inertia, and the restraining mechanism Is released by the seismic force, the relative movement between the crane body and the traveling device occurs, and the energy associated with the relative movement is absorbed by the energy absorbing means. The relative movement (vibration) between the crane body and the traveling device is appropriately mitigated by the damper mounted between them, and thus the seismic isolation function can be exhibited safely and accurately. (Claim 1) (2) The load of the crane main body is transmitted from the saddle attached to the crane main body to the traveling device via the crane load support block, the slewing bearing, and the slewing bearing ring. Then, the axial load, the overturning moment load, and the radial load acting on the crane body due to the earthquake vibration during the operation of the crane are supported by the swing bearing ring and the swing bearing on the traveling device.
Further, the exciting force applied in the radial direction perpendicular to the traveling direction of the traveling device is such that the lower bearing of the slewing bearing ring on the traveling device moves the slewing bearing erected at a position eccentric from the center of the slewing bearing to the horizontal direction. Acts to rotate about the vertical center line of the swing bearing ring together with the lever, and this turning power is automatically suppressed by a horizontal lever swing restoring mechanism provided between the horizontal lever and the traveling device. Thereby, the buffering action for the above-described excitation force is performed. (Claim 2) (3) A guide rail for guiding a roller (or a wheel) at a tip end of a horizontal lever mounted on the slewing bearing ring is provided to be inclined downward from both ends toward a rail middle portion as a neutral position. Automatically restores the horizontal lever, which has been turned by the seismic vibration, to the neutral position, as the roller pressed against the guide rail by the gravity of the crane body automatically returns to the intermediate rail position. Will be able to Further, when the horizontal lever makes a turning movement due to the seismic vibration, the roller climbs the inclined surface of the guide rail, so that the turning movement of the horizontal lever is suppressed. (Claim 3) (4) When the horizontal lever turning and restoring mechanism is constituted by the laminated rubber mounted between the lower surface of the horizontal lever and the upper surface of the traveling device, the horizontal lever is turned by the seismic vibration. At this time, the turning movement of the horizontal lever is appropriately suppressed by the spring effect and the damping effect of the laminated rubber itself, and the automatic restoration operation to the turning amount zero position (neutral position) of the horizontal lever is accurately performed. Will be able to
(5) In the case where the horizontal lever turning and restoring mechanism is constituted by a coil spring mounted between the lower surface of the horizontal lever and the upper surface of the traveling device, the horizontal lever is moved to the upper surface of the traveling device. In combination with the operation of a friction reducing guide member such as a roller for guiding the lever in the turning direction of the lever, the turning movement of the horizontal lever is appropriately elastically suppressed by the coil spring during an earthquake vibration, and By the automatic restoring function of the spring, the automatic restoring operation to the neutral position of the horizontal lever turned by the seismic vibration can be accurately performed. (Claim 5) (6) If a brake means for braking the turning movement of the horizontal lever is provided, an active damping action is performed when receiving an earthquake vibration (Claim 6). (7) The use of a damper (vibrator) also suppresses the turning movement of the horizontal lever, thereby enabling the crane body to perform an active vibration control action in the event of an earthquake vibration. (8) The laminated rubber mounted between the lower surface of the crane main body and the central portion of the traveling device, and the lower surface of the crane main body and the upper surface of the traveling device at symmetrical positions before and after the laminated rubber. When a lateral vibration force is applied to the crane main body due to an earthquake, the crane main body is supported by the lateral slide mechanism while supporting the bending moment load. The sliding force between the crane body and the traveling device is absorbed by the bending deformation of the laminated rubber, and the restoring force of the laminated rubber causes the crane body to move relative to the traveling device. Is automatically returned to the normal position. (Claim 8) (9) If an oil damper is provided between the crane body and the traveling device to suppress the lateral sliding amount, the amount of lateral sliding by the oil damper during an earthquake can be reduced. With the suppressing action, the lateral movement of the crane main body is appropriately suppressed. (Claim 9) (10) When an earthquake vibration occurs, the vibration of the crane main body with respect to the traveling device is detected by a vibration detection sensor and taken into the vibration control unit, and the traveling of the crane main body is performed by a control signal from the control unit. When the driving means is controlled so as to be insulated from the vibration of the device, the lateral vibration of the crane body due to the earthquake is actively damped.
(Claim 10) (11) The lower portion of the crane body and the upper center of the traveling device are connected by a universal joint mechanism, and vibrations connecting the crane body and the traveling device on both sides of the universal joint mechanism. If a damping mechanism is interposed, the lateral excitation force applied to the crane body at right angles to the traveling direction due to the seismic vibration,
While being attenuated by each of the vibration damping mechanisms on both sides of the universal joint mechanism, the vibration of the crane body around the horizontal axis in the front-rear direction in the universal joint mechanism is absorbed as vibration having a large vibration cycle. Become. (12) When a vibration damping mechanism for connecting the crane body and the traveling device is interposed at symmetrical positions before and after the universal joint mechanism, respectively, the vibration damping mechanism is applied to the crane body due to earthquake vibration. The exciting force in the direction is also appropriately attenuated. (13) The universal joint mechanism comprises: a saddle protruding downward from a lower portion of the crane body; and a universal joint block having an upper portion pivotally connected to the saddle by a support shaft in a traveling direction. When the lower part of the universal joint block is constituted by a lower pivot portion which is pivotally attached to the bearing on the traveling device with a horizontal horizontal axis, the structure of the universal joint mechanism is compact and has high strength,
The arrangement will also be performed appropriately. (Claim 1
3) (14) The laminated rubber mounted between the lower surface of the crane body and the center of the traveling device, and the lower surface of the crane body and the upper surface of the traveling device at positions on both sides of the laminated rubber, respectively. If the vehicle is equipped with a fall-preventing restraint member interposed between the two, the relative displacement in the lateral direction generated between the crane body and the traveling device due to the earthquake will be due to the spring effect and the damping effect due to the deformation of the laminated rubber. And is absorbed by. At the same time, the overturning moment load applied with the lateral radial load is supported by the resistance of the overturning restraint members on both sides, and the restoring force of the laminated rubber allows the restoring action to the zero bending position to be performed accurately. Done. (Claim 14) (15) In the case where the above-mentioned laminated rubber and the overturn prevention restraining members on both sides thereof are provided, and a trigger mechanism is provided between the crane body and the traveling device, the predetermined mechanism may be provided due to an earthquake. When a vibration force exceeding the value is applied to the crane,
When the trigger mechanism is released, the seismic isolation function of the laminated rubber and the overturn prevention restraint members on both sides is exerted. And under normal conditions without earthquakes,
Since the crane body and the traveling device are integrally connected by the trigger mechanism, the rigidity of the entire crane can be maintained. (Claim 15) (16) The load of the crane body is passed through the first slewing bearing ring on the traveling device side, the intermediate inclined beam and the second slewing bearing ring on the crane body side, and further via the crane body coupling portion. Can be supported. When the traveling device moves in the lateral direction together with the rail when an earthquake occurs, the first slewing bearing ring and the second slewing bearing ring have rotational center lines that are offset from each other. As a result, the inclined beam is caused to pivot relative to the traveling device, so that the inclined beam pivots and cooperates with the second pivot bearing ring on the beam to push up the crane body. Become. In this way, the crane body mainly moves up and down with the reciprocating lateral movement of the traveling device due to the earthquake. As a result, the crane body has a longer period, and the seismic isolation function is exhibited. (Claim 16) (17) When the upper ring of the second slewing bearing ring and the crane main body are connected by a hinge pin type connecting member and a hydraulic cylinder so as to be tilt-adjustable, the above-described tilt angle beam may be adjusted according to the surface angle. By adjusting the expansion and contraction of the hydraulic cylinder, the crane main body can be kept horizontal, and the relative relationship of the crane main body to the second swivel bearing ring can be appropriately fixed. (Claim 17) (18) If a restraining mechanism such as a shear pin or a brake is provided between the inclined beam and the traveling device, and the restraining mechanism is released only at the time of an earthquake, it is possible to always release the restraining mechanism. Since the inclined beam is fixed, a stable operation similar to that of the conventional crane device is performed. When the restraining mechanism is released by the seismic force and the reciprocating rotation of the tilt beam is performed, an oil damper for suppressing the rotation of the tilt beam is provided. The seismic energy will be absorbed while appropriately mitigating movement. (Claim 18) (19) In the movable connecting mechanism for connecting the crane main body and the traveling device, a horizontal beam is provided instead of the above-mentioned inclined beam. The relative movement that occurs between the traveling device and the crane body in the event of an earthquake in cooperation with the two-slewing bearing ring occurs only in the horizontal plane. The stationary positional relationship between the traveling device and the crane body is held by a spring mechanism, and the relative movement between the traveling device and the crane body performed via the spring mechanism when an earthquake occurs is reduced by an oil damper. In this way, the seismic isolation function for the crane body can be properly performed while absorbing the seismic energy. Also in this case, the load of the crane body is supported via the first slewing bearing ring on the traveling device side, the intermediate horizontal beam and the second slewing bearing ring on the crane body side, and further via the crane body coupling portion. Can be supported without any trouble. (Claim 19) (20) If a restraining mechanism such as a shear pin or a brake is provided between the horizontal beam and the traveling device, and the restraining mechanism is released only at the time of an earthquake, it is always possible to release the restraining mechanism. Since the horizontal beam is fixed, a stable operation similar to that of the conventional crane device is performed. (Claim 20)

[Brief description of the drawings]

FIG. 1 is a side view of a seismic isolation device for a crane as a first embodiment of the present invention.

FIG. 2 is a view taken in the direction of arrows II-II in FIG.

FIG. 3 is a view taken in the direction of arrows III-III in FIG. 1;

FIG. 4 is an enlarged sectional view taken along the line IV-IV in FIG. 3;

FIG. 5 is an enlarged view taken along a line VV in FIG. 1;

6 is a view taken in the direction of arrows VI-VI in FIG. 5;

FIG. 7 is an explanatory view showing a modification of a main part of the apparatus of FIG. 1;

FIG. 8 is a side view showing a seismic isolation device for a crane as a second embodiment of the present invention.

FIG. 9 is a view taken in the direction of arrows IX-IX in FIG. 8;

FIG. 10 is a block diagram of a control system provided in each of the crane seismic isolation devices of FIGS. 1 and 8.

FIG. 11 is a side view of a crane seismic isolation device according to a third embodiment of the present invention.

FIG. 12 is a sectional view taken along the line XII-XII in FIG. 11;

FIG. 13 is a sectional view taken along the arrow XIII-XIII in FIG. 11;

FIG. 14 is a side view of a seismic isolation device for a crane according to a fourth embodiment of the present invention.

15 is a sectional view taken along the line XV-XV in FIG.

16 is a sectional view taken along the line XVI-XVI in FIG.

FIG. 17 is a front view of a traveling portal crane.

FIG. 18 is a side view of the traveling portal crane of FIG. 17;

FIG. 19 is a perspective view of a seismic isolation device for a crane as a fifth embodiment of the present invention.

20 is a side view of the seismic isolation device for a crane of FIG.

FIG. 21 is a view as seen from the direction of arrows AA in FIG. 20;

FIG. 22 is a side view showing a modification of the seismic isolation device for a crane of FIG.

FIG. 23 is a perspective view of a seismic isolation device for a crane as a sixth embodiment of the present invention.

FIG. 24 is a side view of a conventional overhead traveling crane.

FIG. 25 is an enlarged front view showing a main part of the crane of FIG. 24;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Crane main body 2 Traveling device 3 Running rail 4 Truck 5 Wheel 6 Lower equalizer beam 7 axis 8 Upper equalizer beam 9 axis 10 Seismic isolation device 11 Saddle 12 Slewing bearing ring 13 Slewing bearing 14 Horizontal shaft 15 Bracket 16 Horizontal shaft 17 Lower vertical Axis 18 Crane load support block 19 Horizontal lever 20 Horizontal lever rotation restoration mechanism 21 Auxiliary hydraulic damper 21a Drive unit of hydraulic damper 21 Brake plate 23 Brake 24 Roller or wheel 25 Guide rail 26 Laminated rubber 31 Inner lower ring 32 Outer upper ring 33 Bearing for axial load 34 Bearing for moment load 35 Bearing for radial load 36 Laminated rubber 37 Lateral slide mechanism 38 Hydraulic damper (vibrator) 38a Damper drive unit 39 T-rail 40 Saddle 41 Roller 42 Vibration detection sensor 43 Vibration control Part 50 Horizontal axis 51 1st turn Bearing ring 51a Base member 52 Second slewing bearing ring 52a Mounting plate 52b Base member 53 Shear pin (restraint mechanism) 54 Hydraulic cylinder 55 Oil damper 60 Inclined beam 61 Base member 62 Horizontal beam 63 Coil spring (spring mechanism) 111 Universal joint mechanism 112 Vibration Damping mechanism 113 Compression spring 114 Hydraulic damper 115 Saddle 116 Bearing 117 Support shaft 118 Horizontal horizontal shaft 119 Universal joint block 211 Laminated rubber 212 Compression spring (overturn prevention restraint member) 213 Trigger mechanism A Axial load R Radial radial load M Moment load S Torsion load L Traveling device span

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideaki Harada, Inventor 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries, Ltd. Hiroshima Research Laboratory F-term (reference) 3F203 AA06 DA05 EC30 3F204 AA03 CA05 FA00 FC10 FD03 FE00

Claims (20)

[Claims] 1. A seismic isolation device provided between a crane main body and a traveling device having a plurality of wheels for traveling the crane main body along a rail, wherein the crane main body and the traveling device are provided when an earthquake occurs. And a coupling mechanism that allows relative movement of both while being connected to each other, and always maintains the above-mentioned crane body and traveling device in a constant relative positional relationship with each other and is released by seismic force to allow relative movement between the two. A restraining mechanism, energy absorbing means for suppressing an increase in the relative movement between the crane body and the traveling device when an earthquake occurs, and a restoring mechanism for restoring the crane body and the traveling device to a normal positional relationship. Characterized by being provided,
Seismic isolation device for cranes. 2. A seismic isolation device for a crane provided between a crane main body and a traveling device having a plurality of wheels for traveling the crane main body along a rail, wherein the seismic isolation device is mounted horizontally on the traveling device side. A pivot bearing ring comprising a lower ring and an upper ring concentrically and rotatably engaged with the lower ring. A bearing, a crane load supporting block having a vertical axis supported by the slewing bearing at a lower portion, a saddle attached to a lower portion of the crane body to pivotally support the block on a horizontal horizontal axis, and the slewing bearing A horizontal lever whose base end is pivotally supported on the upper ring of the ring via a horizontal horizontal axis, and the tip of the horizontal lever can be turned around the vertical center line of the above-mentioned swivel bearing ring A horizontal lever turning / restoring mechanism for automatically restoring the horizontal lever to a neutral position while supporting the horizontal lever. 3. The horizontal lever turning and restoring mechanism includes a roller provided at the tip of the horizontal lever so as to freely rotate along a turning direction, and a neutral position on the traveling device to guide the roller. The seismic isolation device for a crane according to claim 2, characterized in that the seismic isolation device is configured by a guide rail provided at a downward slope toward a rail intermediate portion. 4. The crane for a crane according to claim 2, wherein the horizontal lever turning / restoring mechanism is formed of a laminated rubber mounted between a lower surface of the horizontal lever and an upper surface of the traveling device. Seismic isolation device. 5. The horizontal lever turning and restoring mechanism includes a coil spring mounted between a lower surface of the horizontal lever and an upper surface of the traveling device, and a tip end of the horizontal lever extending along the upper surface of the traveling device. The seismic isolation device for a crane according to claim 2, wherein the anti-friction guide member is provided between the lever and the traveling device so as to guide the vehicle in the turning direction. 6. The seismic isolation device for a crane according to claim 2, wherein brake means for braking the turning movement of the horizontal lever is provided on the traveling device. . 7. The damper according to claim 2, further comprising a damper between the traveling device and the horizontal lever, the damper being configured to suppress a turning movement of the horizontal lever. Seismic isolation device for cranes. 8. A seismic isolation device for a crane provided between a crane main body and a traveling device having a plurality of wheels for traveling the crane main body along a rail, wherein a lower surface of the crane main body and the traveling device are provided. And a lateral slide mechanism mounted between the lower surface of the crane body and the upper surface of the traveling device at symmetrical positions before and after the laminated rubber. A seismic isolation device for a crane, characterized in that: 9. The seismic isolation device for a crane according to claim 8, wherein a damper for suppressing a lateral sliding amount is provided between the crane main body and the traveling device. 10. A vibration detecting sensor for detecting vibration of the crane body and the traveling device when an earthquake occurs, and a vibration for transmitting a control signal for suppressing the vibration of the crane body based on a detection signal from the sensor. A control unit, and a driving unit that operates between the crane body and the traveling device so as to suppress vibration of the crane body in response to a control signal from the vibration control unit. The seismic isolation device for a crane according to any one of claims 2 to 9. 11. A seismic isolation device for a crane provided between a crane body and a traveling device having a plurality of wheels for traveling the crane body along a rail, wherein a lower portion of the crane body and the traveling device are provided. Is connected to the upper center of the universal joint by a universal joint mechanism.
A seismic isolation device for a crane, wherein a vibration damping mechanism for connecting the crane body and the traveling device is interposed. 12. The crane according to claim 11, wherein a vibration damping mechanism for connecting the crane body and the traveling device is interposed at symmetric positions before and after the universal joint mechanism. Seismic isolation device. 13. A universal joint block comprising: a saddle projecting downward from a lower portion of the crane body; a universal joint block having an upper portion pivotally connected to the saddle with a support shaft in a traveling direction;
13. The seismic isolation device for a crane according to claim 11, wherein the lower portion of the universal joint block is constituted by a lower pivot portion which is pivotally attached to a bearing on the traveling device by a horizontal horizontal axis. 14. A seismic isolation device for a crane provided between a crane main body and a traveling device having a plurality of wheels for traveling the crane main body along a rail, wherein a lower surface of the crane main body and the traveling device are provided. And a fall-preventing restraint member interposed between the lower surface of the crane body and the upper surface of the traveling device at positions on both sides of the rubber laminate, respectively. A seismic isolation device for cranes, which is equipped. 15. A trigger mechanism for restraining a relative displacement between the crane body and the traveling device in a horizontal direction is provided, and when the trigger mechanism receives an excitation force exceeding a predetermined value due to an earthquake. The seismic isolation device for a crane according to claim 14, wherein the seismic device is configured to release the constraint of the relative displacement. 16. A seismic isolation device for a crane provided between a crane main body and a traveling device having a plurality of wheels for traveling the crane main body along a rail, wherein the traveling device has a seismic force when an earthquake occurs. And a tilt guide means for guiding the relative movement of the crane main body when displacing in the lateral direction to add a restoring function by gravity, and the tilt guide means is mounted on the traveling device side in an inclined state. A first slewing bearing ring comprising a lower ring and an upper ring concentrically and rotatably engaged with the lower ring;
An inclined beam provided integrally with the upper ring of the first slewing bearing ring, and a rotation center line at a position on the upper surface of the first slewing bearing horizontally offset from the rotation center line of the first slewing bearing ring. A second slewing bearing ring comprising a mounted lower ring and an upper ring concentrically and rotatably engaged with the lower ring; and an upper ring of the second slewing bearing ring coupled to a lower portion of the crane body. A seismic isolation device for a crane, comprising: 17. The seismic isolator for a crane according to claim 16, wherein the crane body coupling portion is mounted between an upper ring of the second slewing bearing ring and the crane body, respectively. A seismic isolation device for a crane, comprising a member and a hydraulic cylinder. 18. A seismic isolation device for a crane according to claim 16, wherein a restraining mechanism for constantly restraining rotation of the inclined beam and being released by seismic force when an earthquake occurs to allow rotation of the inclined beam. A crane that is installed between the inclined beam and the traveling device, and a damper that suppresses rotation of the inclined beam is installed between the inclined beam and the traveling device. Quake device. 19. A seismic isolation device for a crane provided between a crane main body and a traveling device having a plurality of wheels for traveling the crane main body along a rail, wherein the crane main body and the traveling device are connected to each other. A spring mechanism is provided between them to elastically hold them in a steady positional relationship, and when the traveling device vibrates in the lateral direction due to the occurrence of an earthquake, the crane body remains at the original position due to inertial force. A movable connection mechanism that connects the crane body to be moved while allowing relative displacement of the crane body with respect to the travel device, and a damper that suppresses relative displacement between the crane body and the travel device performed via the spring mechanism Are provided between the crane main body and the traveling device, and the movable coupling mechanism is configured such that the lower ring and the lower ring mounted horizontally on the traveling device side. A first slewing bearing ring comprising an upper ring concentrically and relatively rotatably engaged; a horizontal beam provided integrally with the upper ring of the first slewing bearing ring; A second ring comprising a lower ring mounted so as to have a rotation center line at a position deviated horizontally from the rotation center line of the slewing bearing ring, and an upper ring concentrically and rotatably engaged with the lower ring. A seismic isolation device for a crane, comprising: a slewing bearing ring; and a crane body coupling portion that couples an upper ring of the second slewing bearing ring to a lower portion of the crane body. 20. The seismic isolation device for a crane according to claim 19, wherein a relative displacement of the horizontal beam with respect to the traveling device is always restricted, and the relative displacement is released by seismic force when an earthquake occurs to allow the relative displacement. Is provided between the horizontal beam and the traveling device.