JP5752969B2 - Quay crane - Google Patents

Description

  The present invention relates to a quay crane used for container handling at a port or an inland container terminal.

  At container terminals such as harbors and inland areas, containers between ships, railways and trailers are handled by quay cranes and portal cranes. As an earthquake countermeasure for this quay crane, there is a seismic isolation crane that installs a seismic isolation device (also called a vibration isolation device) between the crane leg structure and the traveling device, and adopts a swinging leg structure for the leg structure (for example, Patent Document 1).

  FIG. 7 shows a quay crane 1X installed in a container terminal. The container terminal has a quay crane 1 </ b> X, a quay 40, and a rail (not shown) laid on the quay 40. This quay crane (hereinafter referred to as a crane) 1X includes a leg structure 3 having a sea side leg and a land side leg, and a boom 45 and a girder 46 supported by the leg structure 3. Moreover, between the leg structure 3 and the traveling apparatus 2X, the seismic isolation apparatus 41 comprised by laminated rubber etc. and the pivot pin 44 which makes a part of the leg structure 3 a rocking leg structure are provided. Reference numeral 43 denotes a container, 47 denotes a cargo handling device (trolley), and 48 denotes a container ship. Further, x indicates the transverse direction of the crane (sea and land direction), and z indicates the vertical direction.

  Next, cargo handling work by the crane 1X will be described. The crane 1 </ b> X performs a cargo handling operation in which the container 43 mounted on the container ship 48 is lifted by a lifting tool of the trolley 47 and mounted on a trailer (not shown) waiting on the quay 40. Or the crane 1X is performing the cargo handling operation | work which loads the container 43 on the container ship 48 from a trailer. Further, in this loading / unloading work, the crane 1X moves on the rail laid along the quay 40 (in the back or front direction of FIG. 7) by the traveling device 2X and changes the unloading or loading position while changing the loading / unloading position. Doing work.

  Next, the operation of the crane 1X when an earthquake occurs will be described. When an earthquake occurs, the shear pin or the like that has fixed the seismic isolation device 41 breaks, and the seismic isolation device 41 operates. The seismic isolation device 41 has an effect of insulating the crane 1X from the vibration of the ground surface. Here, the swing leg structure by the seismic isolation device 41 and the pivot pin 44 can absorb the vibration in the transverse direction x of the crane 1X. In addition, vibration in the traveling direction y (backward or frontward direction in FIG. 7) of the crane 1X is configured to be absorbed by the traveling device 2X moving along the rail.

  FIG. 8 shows an enlarged side view (yz plane) around the traveling device 2X of the crane 1X. The traveling device 2 </ b> X includes a bogie 52 provided with traveling wheels 51, an intermediate equalizer 53, and a main equalizer 54. The leg connecting member 55 is connected to the leg structure 3 via the seismic isolation device 41. Reference numeral 40 denotes a quay 40 and y denotes a traveling direction y of the crane.

  FIG. 9 shows a schematic end face of the front surface (xz plane) around the traveling device 2X. FIG. 9A shows the traveling device 2X at the normal time, and FIG. 9B shows the traveling device 2X at the time of the occurrence of the earthquake. FIG. 9 is a combination of end views of the bogie 52, the intermediate equalizer 53, the main equalizer 54, and the leg connecting member 55. Reference numeral 50 denotes a rail, and C denotes a reference line C of the traveling device 2X and the seismic isolation device 41. Further, dX shown in FIG. 9B indicates the displacement length dX when the seismic isolation device 41 is displaced to the maximum.

However, the quay crane 1X has a problem in that it cannot sufficiently absorb the displacement in the transverse direction x when a large-scale earthquake occurs. Here, a large-scale earthquake is, for example, a seismic wave assumed by the 2006 revision of the Port Law, and is called Level 2 ground motion. This Level 2 ground motion is defined as the ground motion with the maximum strength that can be considered at this point from the present to the future according to the Third Proposal of the Japan Society of Civil Engineers.

  The conventional seismic isolation device 41 of the quay crane 1X can tolerate a displacement length dX of about ± 300 mm in the transverse direction x. However, when a large-scale earthquake occurs, the displacement length that the quay crane 1X should allow is about ± 1000 mm or more. Therefore, the conventional quay crane 1X has a problem that it cannot exert a sufficient seismic isolation effect against a large-scale earthquake. Here, when the maximum displacement length dX of the crane 1X is insufficient, the crane 1X falls over or leads to an accident such as destruction of the traveling device 2X.

JP 2000-44168 A

  The present invention has been made in view of the above-described problems, and the purpose thereof is an accident in which a quay crane falls down even when a large-scale earthquake (for example, level 2 ground motion) occurs in a quay crane, and It is providing the quay crane which can suppress the accident etc. by which a traveling apparatus is destroyed. In particular, it is to provide a quay crane capable of absorbing a displacement length of ± 1000 mm or more.

In order to achieve the above object, a quay crane according to the present invention is a quay crane having a traveling device provided with traveling wheels, wherein the quay crane includes an auxiliary leg installed on a side of the traveling device, and the auxiliary leg. A sliding plate disposed at a position below the quay and having an opening for allowing the traveling wheel to pass therethrough, and a connecting device for connecting the sliding plate to the quay crane, At normal times, the sliding plate does not contact the quay, and the traveling wheel passes through the opening and contacts a rail laid on the quay, and when an earthquake occurs, the auxiliary leg moves to the sliding plate. The quay crane is lifted so that the lower end of the running wheel is higher than the upper surface of the sliding disk , and the connecting device releases the connection between the quay crane and the sliding disk. Configured as And features.

  With this configuration, the quay crane supported by the auxiliary legs can freely slide on the sliding board, and therefore can absorb earthquake motion. For this reason, it is possible to prevent an accident such as a crane overturning and an accident in which the traveling device is destroyed. Moreover, the displacement length of a quay crane can be easily extended only by changing the magnitude | size of a sliding disk.

The auxiliary leg may include a grounding member that comes into contact with the sliding board and a lifting device that lifts and lowers the grounding member. With this configuration, the same effects as described above can be obtained.

It can also be configured such that the height of the sliding disk increases from the flat plate portion toward the inclined portion.

  With this configuration, the quay crane can obtain a restoring force to return to the initial position. Therefore, it is possible to prevent an accident that the quay crane protrudes from the sliding board and slides down.

Quay crane according to the present invention for achieving the above object, the quay crane having a traveling device equipped with running wheels, and an auxiliary leg the quay crane installed on the side of the front Symbol traveling device, the auxiliary leg And a connecting device for connecting the sliding plate to the quay crane , the sliding plate being a flat plate portion, and an outer side of the flat plate portion. And an inclined portion arranged on the flat plate portion or the hinge portion that is configured to be able to tilt and divide the inclined portion, and when an earthquake occurs, the auxiliary leg contacts the quay via the sliding platen The quay crane is lifted, and the connecting device releases the connection between the quay crane and the sliding plate, and the sliding plate folded at the hinge is unfolded and grounded to the quay. To do.

  With this configuration, the seismic performance of the quay crane can be improved (displacement length can be increased) without affecting normal cargo handling work. This is because even if the sliding disk is enlarged, it can be folded and does not hinder the cargo handling work such as a trailer.

  According to the quay crane according to the present invention, even if a large-scale earthquake (for example, level 2 ground motion) occurs in the quay crane, an accident that the quay crane falls and an accident that destroys the traveling device are suppressed. A quay crane can be provided. In particular, a quay crane capable of absorbing a displacement length of ± 1000 mm or more can be provided.

It is the figure which showed the side surface of the traveling apparatus of the quay crane of embodiment which concerns on this invention. It is the figure which showed the sliding disk of the quay crane of embodiment which concerns on this invention. It is the figure which showed the front of the traveling apparatus of the quay crane of embodiment which concerns on this invention. It is the figure which showed the front of the traveling apparatus of the quay crane of embodiment which concerns on this invention. It is the figure which showed the front of the traveling apparatus of the quay crane of different embodiment which concerns on this invention. It is the figure which showed the sliding disk of the wharf crane of different embodiment which concerns on this invention. It is the figure which showed the conventional quay crane. It is the figure which showed the side of the traveling apparatus of the conventional quay crane. It is the end surface schematic which showed the front of the traveling apparatus of the conventional quay crane.

  Hereinafter, a quay crane according to an embodiment of the present invention will be described with reference to the drawings. In FIG. 1, the schematic of the side surface (yz plane) of the traveling apparatus 2 of the quay crane 1 of embodiment which concerns on this invention is shown. A quay crane (hereinafter referred to as a crane) 1 includes a traveling device 2, a seismic isolation device 41, and a leg structure 3. The crane 1 also has auxiliary legs (hereinafter referred to as “outriggers”) 4 and a sliding board 5.

  The outrigger 4 includes a grounding member 10, a hydraulic cylinder (elevating device) 11 for lowering the grounding member 10 in the vertical direction, a hydraulic unit (driving device) 12 for driving the hydraulic cylinder, and a hydraulic hose 13. Yes. The sliding disk 5 is suspended from the crane 1 via a connecting device (for example, a wire) 24. Here, the sliding disk 5 is suspended so as not to contact the quay 40.

  In addition, the raising / lowering apparatus 11 and the drive device 12 are not restricted to said structure, What is necessary is just to have the structure to which the grounding member 10 is dropped. For example, the lifting device 11 may be configured with a screw jack cylinder, and the driving device 12 may be configured with a motor, a secondary battery, and the like. In addition to the above, the lifting device 11 may be configured by an electric actuator, an air cylinder, a rack and pinion mechanism, and the like. Moreover, you may comprise so that the power supply of the raising / lowering apparatus 11 may be supplied from the crane 1 main body. Furthermore, the outrigger 4 should just be installed in the side of the crane 1 or the traveling apparatus 2. FIG.

  In FIG. 2, the sliding board 5 of the quay crane 1 of embodiment which concerns on this invention is shown. The sliding disk 5 includes a flat plate portion 20, an opening 21 formed through the flat plate portion 20, and an inclined portion 22 formed at each end portion in the transverse direction x. The opening 21 is formed in a shape corresponding to the traveling wheel 51 (see FIG. 1).

  In FIG. 3, the schematic of the front (xz plane) of the traveling apparatus 2 of the quay crane 1 of embodiment which concerns on this invention is shown. The crane 1 includes a traveling device 2, an outrigger (auxiliary leg) 4, and a sliding disk 5. The traveling device 2 includes a traveling wheel 51, a bogie 52, an intermediate equalizer 53, and a main equalizer 54. Further, the outrigger 4 has a grounding member 10 and a lifting device 11. The sliding disk 5 is suspended from the crane 1 via a connecting device 24 (for example, a wire 25 and a shear pin 26). Here, 50 indicates a rail 50 laid on the quay 40, and C indicates a reference line C of the traveling device 2.

  Next, the operation of the crane 1 during normal operation (when handling work) will be described. The crane 1 travels in the traveling direction y (the frontward direction in FIG. 3) by the rolling of the traveling wheels 51. Here, the traveling wheel 51 passes through the opening 21 of the sliding disk 5 and is in contact with the rail 50. That is, the opening 21 has a shape that does not hinder the contact between the rail 50 and the traveling wheel 51. Further, the sliding disk 5 is not in contact with the quay 40.

  In FIG. 4, the schematic of the front (xz plane) of the quay crane 1 at the time of an earthquake occurrence is shown. When the crane 1 detects the occurrence of an earthquake, the crane 1 operates the lifting device 11 of the outrigger 4 to lower the grounding member 10. The outrigger 4 is grounded on the quay 40 via the sliding plate 5 having the flat plate portion 20 and the inclined portion 22 and lifts and supports the crane 1. At this time, the traveling wheel 51 of the crane 1 is lifted from the rail 50. More specifically, the lower end portion of the traveling wheel 51 is higher than the upper surface of the sliding disc 5. Here, the elevating device 11 starts an operation using an emergency earthquake warning or a detection signal of a seismometer installed in a container terminal or the like as an input signal.

  With the operation of the lifting device 11, the shear pin 26 of the connecting device 24 that suspends the sliding disc 5 is broken. That is, the sliding disk 5 is released from the connection with the crane 1 and is placed on the quay 40. The crane 1 absorbs the vibration in the transverse direction x by sliding on the sliding board 5. In addition, d has shown the displacement length d of the traveling apparatus 2 of the crane 1. FIG. The displacement length of the crane 1 as a whole is further increased by the action of the seismic isolation device 41 (see FIG. 1).

  With the above configuration, the following operational effects can be obtained. First, the quay crane 1 can sufficiently absorb the vibration in the transverse direction x even when a large-scale earthquake occurs. This is because the crane 1 can move on the sliding board 5. That is, it is possible to prevent an accident where the crane falls and the traveling device is destroyed.

  Second, the crane 1 can be restored quickly and easily. This is because a crash accident of the crane 1 and a breakdown accident of the traveling device do not occur. For this reason, after an earthquake occurs, the crane 1 can be immediately restored, and support goods etc. can be carried in.

  Thirdly, the displacement length d in the transverse direction x of the crane 1 can be designed freely. This is because the displacement length d of the crane 1 can be easily extended only by changing the size of the sliding disc 5. In addition, the crane 1 can improve seismic performance by extension of the displacement length d.

4thly, the crane 1 can obtain a restoring force by the structure in which the sliding disk 5 has the inclination part 22. FIG. That is, the crane 1 can obtain a force for returning to the initial position (on the reference line C). For this reason, it can prevent that the crane 1 protrudes from the sliding disk 5 and slides down. Further, for example, it is possible to prevent an accident that the crane 1 protrudes from the sliding board 5 and falls into the sea.

  It is desirable to install a lubricating member such as nylon on the lower surface of the grounding member 10 and the upper surface of the sliding board 5. Moreover, it is good also as a structure which does not install the seismic isolation apparatus 41 in the crane 1. FIG. With this configuration, the manufacturing cost of the crane 1 can be reduced. Further, the connecting device 24 is not limited to the above-described configuration, and it is sufficient that the sliding disc 5 is separated from the crane 1 and contacts the quay 40 when an earthquake occurs. For example, you may comprise so that the sliding board 5 and the grounding member 10 may be fixed with a shear pin or an electromagnet.

  In FIG. 5, the schematic of the front (xz plane) of the traveling apparatus 2a of the quay crane of different embodiment which concerns on this invention is shown. The crane 1 has a deployable sliding disk 5a. The sliding board 5a includes a flat plate portion 20a, a hinge portion 23 that is configured to be capable of tilting by dividing the flat plate portion 20a along the traveling direction y, and an inclined portion 22a. The crane 1 also has a connecting device 24a (for example, a wire 25a and a shear pin 26) for suspending the sliding disc 5a and maintaining the hinge portion 23 in a bent state (referred to as a closed state). Therefore, one end of the wire 25a is connected to the outside (left side or right side in FIG. 5) from the hinge portion 23.

  Next, operations of the outrigger 4a and the sliding disc 5a will be described. First, as described above, when an earthquake occurs, the outrigger 4a is grounded and lifts and supports the crane. At this time, the sliding disk 5a is pushed downward, and the shear pin 26 is broken. Due to the breaking of the shear pin 26 and the opening of the wire 25a, the sliding disk 5a is developed by its own weight and is in an open state (see the broken line in FIG. 5).

  With the above configuration, the earthquake resistance of the crane 1 can be improved (the displacement length d can be increased) without affecting the normal cargo handling operation. This is because even when the sliding disk 5a is enlarged, it can be folded and does not hinder the cargo handling work such as a trailer.

  FIG. 6 shows a sliding board 5b of a quay crane according to another embodiment of the present invention. In addition to the flat plate part 20b and the inclined part 22b, this sliding board 5b has the inclined part 27 and the corner | angular part 28 which are arrange | positioned at the edge part of the running direction y. Moreover, the opening part 21b is formed so that the sliding disk 5b may be divided into two. With the above configuration, the crane 1 can also absorb earthquake motion in the traveling direction y. Here, the opening 21b may have a shape that does not hinder the contact between the rail 50 and the traveling wheel 51.

  The sliding board 5b may be provided with a hinge part for folding in the running direction y in addition to a hinge part (see FIG. 5) for folding in the transverse direction x, so as to be an unfolding type sliding board.

1 Quay crane (crane)
2, 2a Traveling device 4, 4a Auxiliary leg (outrigger)
5, 5b Sliding disc 10 Grounding member 11 Lifting device 20, 20b Flat plate portion 21, 21b Opening portion 22, 22b Inclining portion 23 Hinge portion 24 Connecting device 40 Quay wall 50 Rail 51 Traveling wheel

Claims (4)

In a quay crane having a traveling device with traveling wheels,
The quay crane is installed on the side of the traveling device with an auxiliary leg, and a sliding board that is disposed below the auxiliary leg and above the quay and has an opening that allows the traveling wheel to pass therethrough. And a connecting device for connecting the sliding disc with the quay crane,
During normal times, the sliding board does not contact the quay, and the traveling wheel passes through the opening and contacts a rail laid on the quay,
When an earthquake occurs, the auxiliary leg touches the quay via the sliding plate and lifts the quay crane so that the lower end of the traveling wheel is higher than the upper surface of the sliding plate , and the connecting device A quay crane configured to release a connection between a quay crane and the sliding board. Said auxiliary legs, quay crane of claim 1 having a ground member in contact with the sliding plate, a lifting device for lifting the ground member. Wherein Suridoban the quay crane according before Symbol flat portion 請 Motomeko 1 or 2 configured as height increases toward the inclined portion. In quay crane having a traveling device equipped with running wheels, and an auxiliary leg the quay crane installed on the side of the front Symbol traveling device, the sliding plate which is disposed above a position of the a lower auxiliary leg quay When, the sliding plate and a coupling device for coupling with the quay crane, and the sliding plate is flat plate portion, an inclined portion disposed on the outer side of the flat portion, the flat portion or the inclined portions divided And a hinge part configured to be tiltable,
When an earthquake occurs, the auxiliary leg touches the quay via the sliding plate to lift the quay crane, and the connecting device releases the connection between the quay crane and the sliding plate and folds at the hinge part. The quay crane is characterized in that the sliding board developed is grounded to the quay.

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