JP2022143786A - Crane and high tide countermeasure method - Google Patents

Abstract

To provide a crane and a high tide countermeasure method capable of avoiding submersion under water of a hydraulic pump included in a rail clamp unit.SOLUTION: In a high tide countermeasure method of a crane including a clamp 7 placed in the vicinity of a rail to hold the rail, a hydraulic cylinder 8 placed in the vicinity of the clamp 7 to control the opening/closing of the clamp 7, and a hydraulic pump 9 connected to the hydraulic cylinder 8 through a hydraulic hose 10, an area in which water does not enter when a high tide occurs is set in advance as a non-submersion area P and the hydraulic pump 9 is placed in the non-submersion area P at least when a high tide occurs.SELECTED DRAWING: Figure 2

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a crane and storm surge countermeasure method for protecting a rail clamp unit during a storm surge, and more particularly to a crane and a storm surge countermeasure method capable of avoiding submergence of a hydraulic pump included in the rail clamp unit.

A variety of cranes that take measures against storm surges have been proposed (see, for example, Patent Document 1). The crane described in Patent Document 1 has a configuration in which a motor for traveling is a waterproof motor. A waterproof motor is installed to keep the crane running even if the running motor is submerged in water.

Generally, a crane is equipped with a rail clamping unit (see, for example, Patent Document 2). The rail clamp unit was configured to release the state in which the clamp gripped the rail by the power of the hydraulic pump, and to enable the crane to travel. Hydraulic pumps are powered by electricity, so they are likely to break down if submerged. If the hydraulic pump were submerged in water and failed, the clamp could not be released and the crane could not run.

Japanese Patent Application Laid-Open No. 2016-60602 Japanese Utility Model Laid-Open No. 06-061883

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a crane and a storm surge countermeasure method capable of avoiding submersion of a hydraulic pump included in a rail clamp unit.

A crane for achieving the above object comprises a clamp arranged near a rail for gripping the rail, a hydraulic cylinder arranged near the clamp for controlling the opening and closing of the clamp, and the hydraulic cylinder and a hydraulic pump connected via a hydraulic hose to a crane, wherein an area that is not flooded when a storm surge occurs is preset as a non-flooded area, and is arranged in the non-flooded area at least when a storm surge occurs. A pump is provided.

A storm surge countermeasure method for achieving the above object comprises: a clamp arranged near a rail to hold the rail; a hydraulic cylinder arranged near the clamp for controlling opening and closing of the clamp; A storm surge countermeasure method for a crane comprising a hydraulic pump connected to a hydraulic cylinder via a hydraulic hose, wherein an area that is not flooded when a storm surge occurs is preset as a non-flood area, and the hydraulic pump is non-flooded at least when a storm surge occurs. It is characterized by being in a state of being arranged in an area.

According to the present invention, it is possible to prevent the hydraulic pump from being submerged, so that the crane can be traveled by releasing the clamp after the occurrence of a storm surge.

It is an explanatory view showing an example of a crane. FIG. 2 is an explanatory diagram illustrating an enlarged rail clamp unit of the crane in FIG. 1; FIG. 3 is an explanatory diagram illustrating an AA arrow view of FIG. 2; FIG. 3 is an explanatory diagram illustrating a modification of FIG. 2; FIG. 3 is an explanatory diagram illustrating a modification of FIG. 2; FIG. 6 is an explanatory diagram illustrating a modification of FIG. 5; FIG. 3 is an explanatory diagram illustrating a modification of FIG. 2;

A crane and storm surge countermeasure method will be described below based on an embodiment shown in the drawings. In the drawing, the traveling direction of the crane is indicated by the arrow y, the transverse direction perpendicular to the traveling direction is indicated by the arrow x, and the vertical direction is indicated by the arrow z.

As illustrated in FIG. 1, the crane 1 includes a leg structure 2 comprising a horizontal member 2a extending in the traveling direction y and leg members 2b extending upward from both ends of the horizontal member 2a. ing. A running device 3 that runs on a rail (not shown) is arranged at the lower end of the leg structure 2 . The traveling devices 3 are arranged near both ends of the horizontal member 2a in the traveling direction y.

The crane 1 is configured by, for example, a wharf crane. The crane 1 is not limited to this, and may be any crane that travels on rails. The crane 1 may be composed of, for example, a portal crane or an unloader. The crane 1 has, for example, four traveling gears 3 .

The traveling device 3 includes a main equalizer 3a arranged below the horizontal member 2a, an intermediate equalizer 3b arranged below the main equalizer 3a, a bogie 3c and a plurality of wheels 3d arranged further below the intermediate equalizer 3b. It has

A columnar member 4 extends downward from the central portion of the horizontal member 2a in the running direction y. A rail clamp unit 5 is installed near the lower end of the columnar member 4 . Also, an anchor (not shown) may be installed at the lower end of the columnar member 4 . A conventional rail clamp unit is composed of a clamp that grips a rail, a hydraulic cylinder that controls opening and closing of the clamp, and a hydraulic pump that is connected to the hydraulic cylinder. Clamps and the like were placed inside the box.

As illustrated in FIGS. 2 and 3 , the rail clamp unit 5 of this embodiment has a box 6 and a clamp 7 and a hydraulic cylinder 8 arranged in the box 6 . The box 6 is formed in a rectangular parallelepiped shape and has an open bottom surface. The clamp 7 is arranged in the vicinity of the rail R and is configured to be able to grip the side surface of the rail R from both sides in the transverse direction x. A hydraulic cylinder 8 is arranged near the clamp 7 and has a structure for controlling the opening and closing of the clamp 7 .

A hydraulic pump 9 is fixed to the side surface of the columnar member 4 . That is, the hydraulic pump 9 is arranged outside the box 6 . A hydraulic hose 10 connects the hydraulic pump 9 and the hydraulic cylinder 8 . A power cable and the like (not shown) are connected to the hydraulic pump 9 . In the figure, the equipment installed inside the box 6 is indicated by a solid line for explanation. Also, in FIG. 3, a part of the rail R is indicated by a dashed line for explanation.

As illustrated in FIG. 2 , the hydraulic cylinder 8 expands and contracts due to the operation of the hydraulic pump 9 . The clamp 7 is configured to release the rail R by either extending or retracting the hydraulic cylinder 8 . A member such as a spring that generates an urging force is installed in the vicinity of the clamp 7 . When the hydraulic pump 9 is not operating, the clamp 7 is closed to grip the rail R by the biasing force of a spring or the like. At this time, the crane 1 is braked by the rail clamp unit 5 .

In this embodiment, the hydraulic pump 9 is arranged in the non-flooded area P. As shown in FIG. The non-flooding area P is an area that will not be flooded when a presumed storm surge occurs. The non-flooded area P is, for example, an area above the assumed water level when a storm surge occurs. In FIG. 2, the boundary between the inner side and the outer side of the non-flooded area P is indicated by a dashed line for explanation. The upper side of the dashed line is the inside of the non-submerged area P, and the lower side of the dashed line is the outside of the non-submerged area P. The non-flooded area P is set, for example, in a range of 3 m or more from the ground. The non-flooded area P can be appropriately set according to the topography of the port where the crane 1 is installed, the surrounding river conditions, and the like. For example, the non-flooded area P may be set to a range of 5 m or more from the ground.

The place where the hydraulic pump 9 is installed is not limited to the above. The hydraulic pump 9 may be arranged in the non-submerged area P, and may be installed, for example, on the upper surface or the side surface of the horizontal member 2a. In this embodiment, the upper surface and side surfaces of the horizontal member 2a are also inside the non-submerged area P. As shown in FIG.

The non-submerged area P is not limited to a location relatively high in the vertical direction z. The non-submerged area P may be an area where water does not enter.

Specifically, a watertight partition into which water does not enter may be formed inside the columnar member 4, and this space may be set as the non-waterlogging area P. FIG. A hydraulic pump 9 can be fixed to the non-submerged area P inside the columnar member 4 . In FIG. 2, the hydraulic pump 9 arranged inside the columnar member 4 is indicated by a dashed line for explanation. The hydraulic pump 9 is connected to the hydraulic cylinder 8 by a hydraulic hose 10 (not shown).

Since the hydraulic pump 9 is fixed to the watertight compartment formed inside the columnar member 4, even if the water level rises due to a storm surge, the hydraulic pump 9 can be prevented from being submerged. An opening/closing portion 11 may be formed on the side surface of the columnar member 4 so that maintenance of the hydraulic pump 9 can be performed.

Since the hydraulic pump 9 is fixed in the non-submerged area P, the hydraulic pump 9 is not submerged even if the water level rises. Since failure of the hydraulic pump 9 can be avoided, the rail gripping by the clamp 7 can be quickly released after the water level has decreased, and the crane 1 can be run.

Since the hydraulic pump 9 is installed outside the box 6 forming the rail clamp unit 5, the size of the box 6 can be reduced. By reducing the size of the box 6, it is possible to increase the number of wheels of the travel device 3, for example.

The state in which the clamp 7 is arranged near the rail R can be maintained. Therefore, the crane 1 can maintain a state in which the brake is applied by the clamp 7 even when a storm surge occurs.

The box 6 may be configured to be connected to the travel device 3 instead of the columnar member 4 . At this time, the hydraulic pump 9 may be installed in the travel device 3 . Specifically, the hydraulic pump 9 can be installed in the main equalizer 3a, the intermediate equalizer 3b, etc., which are located relatively upward.

The hydraulic hose 10 may be configured to have a branch portion 12 as illustrated in FIG. The branch portion 12 is arranged in the middle of the hydraulic hose 10 and is configured to be connectable with a standby hydraulic pump 13 . Branch portion 12 has a switching valve for changing the direction of oil flow. The branch portion 12 normally communicates the hydraulic cylinder 8 and the hydraulic pump 9, and oil does not flow to the portion where the standby hydraulic pump 13 is connected. When the standby hydraulic pump 13 is connected, the branch portion 12 communicates the hydraulic cylinder 8 and the standby hydraulic pump 13, and prevents oil from flowing to the portion where the hydraulic pump 9 is connected.

If the hydraulic pump 9 is submerged due to an unexpectedly high water level at the time of storm surge or if the hydraulic pump 9 breaks down due to contact with drifting objects, a backup hydraulic pump 13 is connected to the branch portion 12 and clamped. The grip of the rail R by 7 is released. After the water level drops, the crane 1 can be quickly moved.

A configuration in which the standby hydraulic pump 13 is installed on the carriage 14 may be employed. The backup hydraulic pump 13 can follow the running of the crane 1 .

Alternatively, the branch portion 12 may be configured to have a switching valve that closes the hydraulic cylinder 8 side. First, a standby hydraulic pump 13 is connected to the branch portion 12 . After the hydraulic cylinder 8 is pressurized by the standby hydraulic pump 13 to open the clamp 7, the hydraulic cylinder 8 side is closed by the switching valve. Even after separating the standby hydraulic pump 13 from the branch portion 12, the open state of the clamp 7 can be maintained.

It is possible to perform recovery work for sequentially opening the clamps 7 of a plurality of cranes 1 using one or a small number of standby hydraulic pumps 13 .

With the configuration including the branching portion 12, even if the water level rises beyond expectations, restoration work can be quickly performed to make the crane 1 operable.

As illustrated in FIG. 5, the hydraulic pump 9, which is normally arranged outside the non-flooded area P, may be moved to the inside of the non-flooded area P when taking countermeasures against storm surge. In this embodiment, a hydraulic pump 9 is also installed in the box 6 in addition to the clamp 7 and the hydraulic cylinder 8 . That is, the rail clamp unit 5 is constructed integrally. The box 6 is connected to the columnar member 4 via the link mechanism 15 . The link mechanism 15 has a support shaft 15a whose axial direction is the transverse direction x. The rail clamp unit 5 is connected to the columnar member 4 by a link mechanism 15 so as to be movable upward.

A suspension mechanism 16 having a configuration for suspending the rail clamp unit 5 upward is installed on the lower surface of the horizontal member 2a that constitutes the leg structure 2. As shown in FIG. The suspension mechanism 16 can be composed of, for example, a chain block. In this embodiment, a suspension mechanism 16 is installed on an eye plate 17 installed on the lower surface of the horizontal member 2a.

The position where the suspension mechanism 16 is installed is not limited to the above. It suffices if the rail clamp unit 5 is installed at a position where it can be lifted upward. For example, the suspension mechanism 16 may be installed on the side surface or top surface of the horizontal member 2a, the leg member 2b, the travel device 3, or the like.

The suspension mechanism 16 may have a configuration in which it is installed on the horizontal member 2a or the like only when it is used, and is removed from the crane 1 when it is not used. That is, the suspension mechanism 16 may be configured to be detachable from the crane 1 . At this time, the suspension mechanism 16 is stored, for example, in a management building. The suspension mechanism 16 may have a structure in which it is fixed directly to the horizontal member 2a or the like without the eye plate 17 interposed therebetween.

The rail clamp unit 5 is lifted upward by a suspension mechanism 16 when taking countermeasures against high tide. A hydraulic pump 9 included in the rail clamp unit 5 is lifted up to a position inside the non-submerged area P. At this time, the link mechanism 15 maintains the connection state between the rail clamp unit 5 and the columnar member 4 . In FIG. 5, for the sake of explanation, the rail clamp unit 5 before storm surge countermeasures is taken is indicated by a dashed line.

Since at least the hydraulic pump 9 is placed in the non-submerged area P, this is advantageous in avoiding the problem of the hydraulic pump 9 being submerged.

A configuration in which the rail clamp unit 5 is separated from the columnar member 4 may be employed. The rail clamp unit 5 may be separated from the columnar member 4 and then lifted by the suspension mechanism 16 when taking countermeasures against high tide. In this case, the crane 1 may be configured without the link mechanism 15 . That is, the rail clamp unit 5 may be directly connected to the columnar member 4 .

As illustrated in FIG. 6, the hydraulic pump 9 may be removed from the rail clamp unit 5 and only the hydraulic pump 9 may be lifted to a position inside the non-submerged area P by the suspension mechanism 16 . It is sufficient that at least the hydraulic pump 9 is moved from the outside of the non-flooded area P to the inside. In FIG. 6, for the sake of explanation, the hydraulic pump 9 before storm surge countermeasures is taken is indicated by a dashed line.

In this embodiment, the box 6 is fixed to the columnar member 4 via the flange portion 18 . The box 6 continues to be fixed to the columnar member 4 before and after the storm surge countermeasures are taken.

The hydraulic hose 10 remains connected to the hydraulic cylinder 8 and the hydraulic pump 9 . This hydraulic hose 10 may be configured to have a branch portion 12 . The hydraulic pump 9 may be lifted by the suspension mechanism 16 after the hydraulic hose 10 disconnects the hydraulic cylinder 8 and the hydraulic pump 9 from each other.

Since at least the hydraulic pump 9 can be lifted to the non-submerged area P, it is advantageous to avoid submersion of the hydraulic pump 9 .

As exemplified in FIG. 7, a configuration may be adopted in which devices other than the hydraulic pump 9 are lifted to a position inside the non-submerged area P by a suspension mechanism 16 . In this embodiment, a suspension mechanism 16 suspends a box 6 on which a clamp 7 and a hydraulic cylinder 8 are installed. The hydraulic pump 9 is fixed to the columnar member 4 outside the box 6 . The hydraulic pump 9 is always fixed in the non-submerged area P, as in the embodiment illustrated in FIG. An eye plate 17 is installed on a side surface of the horizontal member 2a that is parallel to the running direction y. A suspension mechanism 16 is installed on the eye plate 17 .

When taking countermeasures against high tide, the connection between the box 6 and the columnar member 4 by the flange portion 18 is released. The box 6 is lifted by the suspension mechanism 16 after being separated. The hydraulic hose 10 remains connected to the hydraulic cylinder 8 and the hydraulic pump 9 . In FIG. 7, for the sake of explanation, the box 6 and the like before taking countermeasures against storm surge are indicated by dashed lines.

A configuration in which the box 6 is connected to the columnar member 4 by the link mechanism 15 may be employed. The box 6 can be lifted upward by the suspension mechanism 16 while maintaining the state of being connected to the columnar member 4 via the link mechanism 15 .

Since the clamps 7 and the hydraulic cylinders 8 can be retracted to the non-flooded area P, it is advantageous in avoiding the malfunction of the clamps 7 and the like due to collision with drifting objects when a storm surge occurs. Since it is not submerged, it is advantageous for avoiding the problem that the clamp 7 and the like are corroded by salt water.

The suspension mechanism 16 is not limited to a configuration in which the hydraulic pump 9 or the like is suspended by a wire. As long as the suspension mechanism 16 has a configuration capable of moving the hydraulic pump 9 and the like to the non-submerged area P, another configuration may be used. For example, the suspension mechanism 16 may have a configuration for moving the hydraulic pump 9 or the like to the non-submerged area P along a guide rail or the like.

1 Crane 2 Leg structure 2a Horizontal member 2b Leg member 3 Travel device 3a Main equalizer 3b Intermediate equalizer 3c Bogie 3d Wheel 4 Column member 5 Rail clamp unit 6 Box 7 Clamp 8 Hydraulic cylinder 9 Hydraulic pump 10 Hydraulic hose 11 Opening and closing part 12 Branch portion 13 Reserve hydraulic pump 14 Carriage 15 Link mechanism 15a Support shaft 16 Suspension mechanism 17 Eye plate 18 Flange x Traversing direction y Traveling direction z Vertical direction R Rail P Non-flooding area

Claims (8)

A clamp arranged near a rail to grip the rail, a hydraulic cylinder arranged near the clamp to control opening and closing of the clamp, and a hydraulic pump connected to the hydraulic cylinder via a hydraulic hose. In a crane comprising
An area that will not be flooded when a storm surge occurs is set in advance as a non-flooded area,
A crane according to claim 1, wherein said hydraulic pump is arranged in a non-flooded area at least during a storm surge. 2. The crane of claim 1, wherein said hydraulic pump is provided with an arrangement to be fixed in a non-flooded area. 2. A crane according to claim 1, comprising a suspension mechanism for lifting said hydraulic pump and moving it from the outside to the inside of the non-submerged area. A rail clamp unit having the clamp, the hydraulic cylinder and the hydraulic pump, a horizontal member forming the leg structure of the crane, and the rail clamp unit extending downward from the horizontal member near the lower end thereof. and a columnar member on which is installed,
4. The crane of claim 3, wherein the suspension mechanism is configured to lift the rail clamp unit upwards. The crane according to any one of claims 1 to 4, wherein the hydraulic hose has a branched portion configured to be connectable with a standby hydraulic pump. A clamp arranged near a rail to grip the rail, a hydraulic cylinder arranged near the clamp to control opening and closing of the clamp, and a hydraulic pump connected to the hydraulic cylinder via a hydraulic hose. In a crane storm surge countermeasure method comprising
An area that will not be flooded when a storm surge occurs is set in advance as a non-flooded area,
A storm surge countermeasure method, characterized in that the hydraulic pump is placed in a non-flooded area at least when a storm surge occurs. The storm surge countermeasure method according to claim 6, wherein at least the hydraulic pump is moved from the outside to the inside of the non-flooded area. A columnar member extends downward from a horizontal member that constitutes the leg structure of the crane, and a rail clamp unit having the clamp, the hydraulic cylinder, and the hydraulic pump is installed near the lower end of the columnar member. being
The storm surge countermeasure method according to claim 7, wherein the rail clamp unit is moved from the outside to the inside of the non-flooded area.

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