JP7411599B2 - Cranes and storm surge countermeasures - Google Patents

Description

The present invention relates to a crane and a storm surge countermeasure method that protect a rail clamp unit during a storm surge, and more particularly to a crane and storm surge countermeasure method that can prevent a hydraulic pump included in the rail clamp unit from submerging in water.

Various cranes have been proposed with storm surge countermeasures (for example, see Patent Document 1). The crane described in Patent Document 1 has a configuration in which a traveling motor is a waterproof motor. A waterproof motor is installed to allow the crane to run even if the travel motor is submerged in water.

Cranes generally include a rail clamp unit (see, for example, Patent Document 2). The rail clamp unit was configured to use the power of a hydraulic pump to release the clamp from gripping the rail, allowing the crane to travel. Since hydraulic pumps operate on electricity, there is a high possibility that they will malfunction if submerged in water. If the hydraulic pump were submerged in water and malfunctioned, it would be impossible to release the clamp, causing the crane to be unable to move.

Japanese Patent Application Publication No. 2016-60602 Japan Utility Model Publication No. 06-061883

The present invention has been made in view of the above problems, and its purpose is to provide a crane and a storm surge countermeasure method that can avoid submergence of a hydraulic pump included in a rail clamp unit.

A crane for achieving the above purpose includes a clamp that is placed near the rail and grips the rail, a hydraulic cylinder that is placed near the clamp that controls opening and closing of the clamp, and a hydraulic cylinder that is placed near the rail and that controls the opening and closing of the clamp. A crane equipped with a hydraulic pump connected to the crane via a hydraulic hose, an area that is 3 m or more from the ground is preset as a non-floodable area, and is a non-floodable area at least when a storm surge occurs, and the legs of the crane are The hydraulic pump is characterized in that the hydraulic pump includes a structure disposed on the top surface or side surface of a horizontal member that constitutes the structure .

A storm surge countermeasure method for achieving the above purpose includes: a clamp placed near the rail to grip the rail; a hydraulic cylinder placed near the clamp to control opening/closing of the clamp; In a storm surge countermeasure method for a crane that is equipped with a hydraulic pump connected to a hydraulic cylinder via a hydraulic hose, an area that is 3 m or more from the ground is preset as a non-flood area, and at least when a storm surge occurs, the hydraulic pump is non-flooded. It is characterized in that it is a flooded area and is disposed on the top or side surface of a horizontal member that constitutes the leg structure of the crane .

According to the present invention, since the hydraulic pump can be prevented from being submerged in water, the clamp can be released and the crane can be driven after a storm surge occurs.

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

Hereinafter, a crane and a storm surge countermeasure method will be described based on the embodiment shown in the drawings. In the figure, the traveling direction of the crane is indicated by an arrow y, the traverse direction perpendicular to this traveling direction is indicated by an arrow x, and the vertical direction is indicated by an arrow z.

As illustrated in FIG. 1, the crane 1 includes a leg structure 2 consisting of 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 traveling device 3 that travels on rails (not shown) is arranged at the lower end of the leg structure 2. The traveling device 3 is arranged near both ends of the horizontal member 2a in the traveling direction y.

The crane 1 is composed of, for example, a quay crane. The crane 1 is not limited to this, and may be any crane that runs on rails. The crane 1 may be composed of, for example, a gantry crane or an unloader. The crane 1 includes, for example, four traveling devices 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 is equipped with

A columnar member 4 extends downward from the center 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. Further, an anchor (not shown) may be installed at the lower end of the columnar member 4. A conventional rail clamp unit includes a clamp that grips the rail, a hydraulic cylinder that controls opening and closing of the clamp, and a hydraulic pump that is connected to the hydraulic cylinder. Clamps, etc. were placed inside the box.

As illustrated in FIGS. 2 and 3, the rail clamp unit 5 of this embodiment includes a box 6, and a clamp 7 and a hydraulic cylinder 8 arranged inside the box 6. The box body 6 is formed into a rectangular parallelepiped shape and has an open bottom surface. The clamp 7 is arranged near 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. The hydraulic cylinder 8 is arranged near the clamp 7 and has a configuration for controlling the opening and closing of the clamp 7.

The 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 body 6. The hydraulic pump 9 and the hydraulic cylinder 8 are connected by a hydraulic hose 10. A power cable and the like (not shown) are connected to the hydraulic pump 9. In the figure, devices installed inside the box 6 are shown by solid lines for explanation. Further, in FIG. 3, a part of the rail R is shown by a broken 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 its grip on the rail R by either expanding or contracting the hydraulic cylinder 8. A member such as a spring that generates a biasing force is installed near the clamp 7. When the hydraulic pump 9 is not operating, the clamp 7 closes and grips the rail R by the urging force of a spring or the like. At this time, the crane 1 is in a braked state by the rail clamp unit 5.

In this embodiment, the hydraulic pump 9 is arranged in the non-flooded area P. The non-flooded area P refers to an area that will not be flooded when a previously anticipated storm surge occurs. The non-flooded area P is, for example, an area above the expected water level when a storm surge occurs. In FIG. 2, the boundary between the inside and outside of the non-flooded area P is shown by a dashed-dotted line for the sake of explanation. The upper side of the dashed-dotted line is inside the non-flooded area P, and the side below the dashed-dotted line is outside of the non-flooded area P. The non-flooded area P is set, for example, to a range that is 3 m or more from the ground. The non-flooded area P can be set as appropriate depending on the topography of the port where the crane 1 is installed, the conditions of the surrounding rivers, etc. The non-flooded area P may be set, for example, to a range of 5 m or more from the ground.

The location where the hydraulic pump 9 is installed is not limited to the above. The hydraulic pump 9 only needs to be placed in the non-flooded area P, and may be installed, for example, on the top or 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-flooded area P.

The non-flooded area P is not limited to a relatively high position in the vertical direction z. The non-flooded area P may be any area where water does not enter. For example, the non-flooded area P can also be a space configured to be watertight even if it is located at a relatively low position.

Specifically, a watertight section may be formed inside the columnar member 4 in which water does not enter, and this space may be set as the non-flood area P. The hydraulic pump 9 can be fixed to the non-flooded area P inside the columnar member 4. In FIG. 2, the hydraulic pump 9 disposed inside the columnar member 4 is shown by a broken line for explanation. This hydraulic pump 9 is connected to a hydraulic cylinder 8 through a hydraulic hose 10 (not shown).

Since the hydraulic pump 9 is fixed in a watertight compartment formed inside the columnar member 4, it is possible to avoid submerging the hydraulic pump 9 even if the water level rises due to a high tide. The opening/closing part 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 configured to be fixed in the non-flooded area P, the hydraulic pump 9 will not be submerged in water even if the water level rises. Since failure of the hydraulic pump 9 can be avoided, the clamp 7 can quickly release the grip on the rail after the water level has decreased, and the crane 1 can be moved.

Since the hydraulic pump 9 is installed outside the box 6 that constitutes the rail clamp unit 5, the box 6 can be made smaller. By reducing the size of the box 6, it becomes possible to increase the number of wheels of the traveling device 3, for example.

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

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

As illustrated in FIG. 4, the hydraulic hose 10 may have a branch portion 12. The branch portion 12 is disposed in the middle of the hydraulic hose 10 and is configured to allow connection of a backup hydraulic pump 13. The 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 to which the backup hydraulic pump 13 is connected. When the backup hydraulic pump 13 is connected, the branch portion 12 communicates the hydraulic cylinder 8 and the backup hydraulic pump 13, and prevents oil from flowing to the portion where the hydraulic pump 9 is connected.

If the water level rises beyond expectations during a storm surge and the hydraulic pump 9 is submerged, or if the hydraulic pump 9 breaks down due to contact with floating objects, a backup hydraulic pump 13 is connected to the branch part 12 and clamped. 7 to release the grip on the rail R. It becomes possible to run the crane 1 immediately after the water level falls.

The standby hydraulic pump 13 may be installed on the truck 14. The backup hydraulic pump 13 can be made to follow the movement of the crane 1.

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

Restoration work in which the clamps 7 of a plurality of cranes 1 are sequentially opened can be performed using one or a small number of backup hydraulic pumps 13.

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

As illustrated in FIG. 5, the hydraulic pump 9, which is normally placed outside the non-flooded area P, may be moved to the inside of the non-flooded area P when storm surge countermeasures are taken. In this embodiment, a hydraulic pump 9 is also installed in the box body 6 in addition to the clamp 7 and the hydraulic cylinder 8. In other words, the rail clamp unit 5 is integrally constructed. The box body 6 is connected to the columnar member 4 via a 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 in an upwardly movable state.

A suspension mechanism 16 configured to lift the rail clamp unit 5 upward is installed on the lower surface of the horizontal member 2a constituting the leg structure 2. 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 is sufficient that the rail clamp unit 5 is installed in a position where it can be lifted upward. For example, the suspension mechanism 16 may be installed on the side or top surface of the horizontal member 2a, the leg member 2b, the traveling device 3, or the like.

The suspension mechanism 16 may be installed on the horizontal member 2a etc. only when in use, and removed from the crane 1 when not in use. 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 an administration building. The suspension mechanism 16 may have a configuration in which it is directly fixed to the horizontal member 2a or the like without using the eye plate 17.

When taking storm surge countermeasures, the rail clamp unit 5 is lifted upward by a suspension mechanism 16. The hydraulic pump 9 included in the rail clamp unit 5 is lifted to a position inside the non-flooded area P. At this time, the link mechanism 15 maintains the connected state between the rail clamp unit 5 and the columnar member 4. In FIG. 5, the rail clamp unit 5 before storm surge countermeasures is shown by a broken line for explanation.

At least the hydraulic pump 9 is placed in the non-flooded area P, which is advantageous in avoiding the problem of the hydraulic pump 9 being submerged in water.

The rail clamp unit 5 may be separated from the columnar member 4. A configuration may also be adopted in which the rail clamp unit 5 is separated from the columnar member 4 when taking measures against storm surge, and then lifted up by the suspension mechanism 16. In this case, the crane 1 may be configured without the link mechanism 15. In other words, 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-flooded area P by the suspension mechanism 16. Any configuration is sufficient as long as at least the hydraulic pump 9 is moved from the outside to the inside of the non-flooded area P. In FIG. 6, the hydraulic pump 9 before storm surge countermeasures is shown by a broken line for explanation.

In this embodiment, the box body 6 is fixed to the columnar member 4 via the flange portion 18. The box body 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. The hydraulic hose 10 may have a branch portion 12. The configuration may be such that the hydraulic pump 9 is lifted up by the suspension mechanism 16 after the hydraulic cylinder 8 and the hydraulic pump 9 are disconnected by the hydraulic hose 10 .

At least the hydraulic pump 9 can be lifted to the non-flooded area P, which is advantageous in avoiding submergence of the hydraulic pump 9.

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

When taking storm surge countermeasures, the connection between the box body 6 and the columnar member 4 through the flange portion 18 is released. After being separated, the box body 6 is lifted up by the suspension mechanism 16. The hydraulic hose 10 remains connected to the hydraulic cylinder 8 and the hydraulic pump 9. In FIG. 7, the box 6 and the like before storm surge countermeasures are shown with broken lines for explanation.

The box body 6 may be configured to be connected to the columnar member 4 by a link mechanism 15. The box body 6 can be lifted upward by the suspension mechanism 16 while maintaining the state connected to the columnar member 4 via the link mechanism 15.

Since the clamp 7 and the hydraulic cylinder 8 can be evacuated to the non-flooded area P, this is advantageous in avoiding problems in which the clamp 7 and the like break down due to collision with floating objects when a storm surge occurs. Since it is not submerged in water, it is advantageous to avoid the problem of corrosion of the clamp 7 etc. due to salt water.

The suspension mechanism 16 is not limited to a configuration in which the hydraulic pump 9 and the like are suspended with a wire. The suspension mechanism 16 may have any other configuration as long as it has a configuration that allows the hydraulic pump 9 and the like to be moved to the non-flooded area P. For example, the suspension mechanism 16 may include a configuration for moving the hydraulic pump 9 or the like to the non-flooded area P along a guide rail or the like.

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

Claims (8)

A clamp placed near the rail to grip the rail, a hydraulic cylinder placed 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:
The area that is 3m or more from the ground is preset as a non-flood area,
The crane is characterized in that the hydraulic pump has a structure that is a non-flooded area at least when a high tide occurs and is arranged on the top or side surface of a horizontal member that constitutes a leg structure of the crane . The crane of claim 1, wherein the hydraulic pump includes a configuration fixed to a non-flooded area. A clamp placed near the rail to grip the rail, a hydraulic cylinder placed 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:
The crane has a horizontal member constituting a leg structure and a columnar member extending downward from the horizontal member, and a watertight section formed inside the columnar member serves as a non-flood area. It is preset,
The crane characterized in that the hydraulic pump is configured to be fixed to a non-flooded area inside the columnar member . A clamp placed near the rail to grip the rail, a hydraulic cylinder placed 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:
The area that is 3m or more from the ground is preset as a non-flood area,
The hydraulic pump is configured to be located in a non-flooded area at least when a storm surge occurs,
a suspension mechanism for lifting the hydraulic pump and moving it from the outside to the inside of the non-flooded area; a rail clamp unit having the clamp, the hydraulic cylinder, and the hydraulic pump; and a horizontal member constituting a leg structure of the crane. , a columnar member extending downward from the horizontal member and having the rail clamp unit installed near its lower end;
A crane characterized in that the suspension mechanism has a configuration for lifting the rail clamp unit upward. The crane according to any one of claims 1 to 4, wherein the hydraulic hose has a branch portion configured to be connectable to a backup hydraulic pump. A clamp placed near the rail to grip the rail, a hydraulic cylinder placed 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 storm surge countermeasure method for a crane comprising:
The area that is 3m or more from the ground is preset as a non-flood area,
A storm surge countermeasure method characterized in that at least when a storm surge occurs , the hydraulic pump is in a non-flooded area and is placed on the top or side surface of a horizontal member constituting a leg structure of the crane . The storm surge countermeasure method according to claim 6, wherein at least the hydraulic pump is moved from outside to inside the non-flooded area. A clamp placed near the rail to grip the rail, a hydraulic cylinder placed 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 storm surge countermeasure method for a crane comprising:
The area that is 3m or more from the ground is preset as a non-flood area,
Assuming that the hydraulic pump is located in a non-flooded area at least when a storm surge occurs,
At least the hydraulic pump moves from outside to inside the non-flooded area,
A columnar member extends downward from a horizontal member constituting the leg structure of the crane, and a rail clamp unit including the clamp, the hydraulic cylinder, and the hydraulic pump is installed near the lower end of the columnar member. has been,
A storm surge countermeasure method characterized in that the rail clamp unit is moved from outside to inside a non-flooded area.

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