JP6735050B1 - Stand lifting device for ships - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a gantry lifting device for a ship capable of safely mooring a ship by ensuring a sufficient lifting height of a ship bottom. A gantry elevating device 6 for a ship, which is provided on a platform 2 and elevates a pedestal 5 on which a ship 7 is placed and supported, the gantry elevating device for a ship being movable to be connected to the gantry. A suspending member 86 having an end 86a and a fixed end 86b connected to the platform, a suspending member support 83 on which the suspending member is bridged in an inverted U shape, and a gantry lifting cylinder 80 for elevating the suspending member support. When the lifting member support is lifted and lowered by the gantry lifting cylinder, the movable end of the lifting member moves up and down, and the mooring position where the ship is moored in the watered state and the evacuation where the ship is not affected by sea level rise The pedestal moves up and down between the positions. [Selection diagram] Fig. 5

Description

The present invention relates to a gantry lifting device for ships.

For example, in Patent Document 1, a frame is suspended over a pair of floats spaced apart in the width direction of the ship, and a ship support member driven by a winch provided on the frame lifts the ship. Is disclosed.

JP, 2008-49977, A

In Patent Document 1, the frame structure includes two column members and a beam member that connects the tops of the two column members, and the frame structure has a substantially inverted U shape in a side view. A winch provided on a beam member of a frame structure is used to hoist a ship by winding a ship support member that is laid over the bottom of the ship. In Patent Document 1, since the ship is hoisted for the purpose of preventing sea shells and algae from adhering to the ship bottom, the hoisting height of the ship bottom is such that the ship bottom is located slightly above the sea surface.

When the sea level rises due to high tides or tsunami, the ship may capsize if the bottom of the ship is only slightly away from the sea level. However, in Patent Document 1, since it is necessary to hoist the ship so that the upper deck or the bridge of the ship does not come into contact with the beam members of the inverted U-shaped frame structure, the hoisting height of the ship bottom cannot be sufficiently secured. .. Therefore, in Patent Document 1, there is a problem that the ship cannot be moored safely when the sea level rises such as a high tide or a tsunami.

Then, the subject of this invention is providing the gantry raising/lowering apparatus for ships which can moor a ship safely by ensuring sufficient lifting height of a ship bottom.

In order to solve the above problems, a gantry lifting device for a ship according to an aspect of the present invention,
A platform elevating device for a ship, which is provided on a platform and which elevates and lowers a platform for mounting and supporting the ship,
The platform lifting device for the ship is
A suspension member having a movable end connected to the gantry and a fixed end connected to the platform;
A suspension member support body in which the suspension member is bridged in an inverted U shape;
A gantry lifting cylinder for lifting the hanging member support,
When the hanging member support is raised and lowered by the gantry lifting cylinder, the movable end of the hanging member moves up and down, and the mooring position at which the ship is moored in a watered state and the influence of sea level rise on the ship. It is characterized in that the gantry moves up and down between it and the retracted position where it is not received.

According to the present invention, when the hanging member support is raised and lowered by the gantry lifting cylinder, the movable end connected to the gantry rises, so that the gantry rises from the mooring position to the retracted position. Therefore, when the sea level rises due to a high tide or a tsunami, the ship can be moored safely by ensuring a sufficient lifting height of the ship bottom.

1 is a schematic plan view of a platform provided with a gantry lifting device for a ship according to an embodiment. It is a side view of the gantry lifting device when viewed from the side opposite to the platform in the ship width direction. It is a figure when the gantry lifting device shown in FIG. 2 is seen from the ship length direction. It is a side view of the gantry lifting device when viewed from the platform side in the ship width direction. It is a figure when the gantry lifting device shown in FIG. 4 is seen from the ship length direction. It is a principal part enlarged view explaining the gantry lock device of the gantry lifting device shown in FIG.

Hereinafter, an embodiment of a gantry lifting device 6 for a ship according to the present invention will be described with reference to the drawings.

[Overall structure of work platform]
FIG. 1 is a schematic plan view of a platform 2 provided with a platform elevating device 6 for a ship according to an embodiment.

The work pontoon 1 is a self-lifting work pontoon (SEP) including a platform 2 as an offshore structure installed on the sea, a leg lifting device 4 as up and down driving means, and a leg 3 as a supporting column. : Self Elevating Platform). The work pontoon 1 is used as an anchorage facility for anchoring a ship, as an offshore wind power generation facility, as a pier for mooring a ship, or as an offshore heliport. On the platform 2, a ship lifter, an offshore wind turbine, a crane, etc. are appropriately installed.

After towing the work pontoon 1 to a predetermined installation point, the leg lifting device 4 moves the leg 3 downward relative to the platform 2 at the predetermined installation point. When the leg tip of the leg 3 is pushed into the seabed 9, a reaction force from the seabed 9 can be obtained, and the platform 2 can be lifted above the sea surface 8 by this reaction force. The platform 2 is lifted to a height that is not affected by the waves (for example, about 10 m). By holding this state, the self-elevating platform 2 is erected on the ocean. By erecting the self-elevating platform 2 at a position higher than the sea level 8, the platform 2 is less likely to be affected by waves and the like and less likely to shake.

As shown in FIGS. 1 to 3, the platform 2 has a substantially rectangular parallelepiped shape having a low height, is substantially rectangular when viewed from above, and includes a top plate 21, a bottom plate 22, side plates 23, and a partition plate 24. .. The platform 2 is, for example, 120 m long×40 m wide×6 m high. In the platform 2, for example, four 800-ton class ships 7 can be moored.

Guide holes that penetrate the platform 2 in the height direction (vertical direction) are formed at the four corners of the platform 2. The guide hole has, for example, a rectangular shape so that the rectangular leg 3 can be inserted through the guide hole in the vertical direction. An inner space surrounded by the upper plate 21, the bottom plate 22, and the side plate 23 is partitioned by a plurality of partition plates 24.

The inner space of the platform 2 has a watertight structure, and the platform 2 can obtain buoyancy due to this watertight structure, and the entire work platform 1 can float on water. Therefore, with the work pontoon 1 floating on the sea surface 8, the work pontoon 1 can be towed and moved to the installation point. Further, the work pontoon 1 can be configured to be self-propelled and move to the installation point by including a propulsion device such as a screw propeller.

As shown in FIG. 1, the leg lifting device 4 is attached to the platform 2 as a leg lifting unit so as to surround the guide holes formed at the four corners of the platform 2. The leg lifting device 4 is mounted flush with the upper plate 21 by being locked to a locking step formed on the upper plate 21 of the platform 2 by a flange provided on the upper end of the leg lifting unit. According to this structure, the worker can safely work on the upper plate 21 of the platform 2.

[Leg structure]
As shown in FIGS. 1 to 3, the leg 3 that supports the platform 2 is a hollow rectangular (cross-section is, for example, substantially square) steel pipe, and is, for example, 3 m square and 50 m long.

The leg 3 has two facing engagement surfaces 31, and a plurality of tapered engagement recesses 35 are formed in the longitudinal direction of the leg 3 at the center of the width of the two engagement surfaces 31. Has been done. The engagement recess 35 does not penetrate in the direction orthogonal to the longitudinal direction (lateral direction) of the leg 3. Preferably, the plurality of engaging recesses 35 are continuously formed in the longitudinal direction of the leg 3. According to this configuration, the leg 3 can be relatively moved in the vertical direction by a very small amount, so that a minute alignment can be performed. The engagement recess 35 has a circular shape in a front view, and also has a tapered taper shape (trapezoidal shape) toward the inside of the leg 3 in a cross-sectional view. The engagement recess 35 is formed, for example, with an insertion opening diameter of 500 mm, a curved portion of 100 mm, and a pitch of 600 mm.

[Structure of leg lifting device]
Each leg lifting device 4 includes an upper locking device 50 a and a lower locking device 50 b that work as a locking device 50, and a leg lifting cylinder 60. The upper lock device 50a is attached to a movable base via a bracket and is movable in the longitudinal direction (vertical direction) of the leg 3. The lower lock device 50b is attached to the fixed base via a bracket and is immovable and fixed in the longitudinal direction (vertical direction) of the leg 3. The fixed base is fixed to the upper plate 21 of the platform 2.

In order to lock and fix the leg 3, an upper side lock device 50a and a lower side lock device 50b are arranged so as to face each engagement surface 31. The upper side locking device 50a and the lower side locking device 50b are arranged around one leg 3 on one side and the other side, respectively. That is, a pair of upper and lower leg lifting cylinders 60 are arranged on the side of the engagement surface 31 on one side so as to be spaced apart in the longitudinal direction (vertical direction) of the leg 3, and a pair of upper and lower sides on the side of the engagement surface 31 on the other side. The leg lifting cylinders 60 are arranged apart from each other in the longitudinal direction (vertical direction) of the leg 3. The upper side locking device 50a and the lower side locking device 50b have the same configuration as the gantry locking device 50c described later, and thus details thereof will be described later.

[Structure of gantry lifting device]
2 is a side view of the gantry lifting device 6 when viewed from the side opposite to the platform in the ship width direction, and FIG. 3 is a view of the gantry lifting device 6 shown in FIG. 2 when viewed from the ship length direction. .. 4 is a side view of the gantry lifting device 6 when viewed from the platform side in the ship width direction, and FIG. 5 is a view of the gantry lifting device 6 shown in FIG. 4 when viewed from the ship length direction.

2 and 3 show the gantry lifting device 6 when the ship 7 is in a mooring position where the ship 7 is moored in a watered state, and FIGS. 4 and 5 show the ship 7 in a retracted position where it is not affected by the rise of the sea level 8. 3 shows the gantry lifting device 6 when it is in the position.

The gantry lifting device 6 is provided on the platform 2 and lifts and lowers the gantry 5 on which the ship 7 is placed and supported. The gantry lifting device 6 includes a gantry 5, a hanging member 86, a hanging member support body 83, and a gantry lifting cylinder 80.

The gantry 5 includes a mounting table supporting portion 41, a mounting table portion 42, and a pair of guide columns 45, and has a substantially L shape in a side view, as shown in FIG. The mounting table support part 41 is a plate-shaped body extending in the vertical direction. The mounting table support part 41 has a pair of left and right vertical frame parts 43 and a pair of left and right gantry side connection parts 44 that project toward the platform 2 on the platform 2 side. The vertical frame portion 43 extends in the vertical direction and is arranged inside the guide pillar 45. The vertical frame portion 43 has a plurality of support holes for inserting the support shaft 47. The plurality of support holes are arranged in the vertical frame portion 43 so as to be separated from each other in the vertical direction. In the vertical frame portion 43, a plurality of taper-shaped engaging recesses 75 are formed at positions that do not overlap with the support holes. The gantry-side connection portion 44 is arranged outside the guide pillar 45.

A plurality of engagement recesses 75 are formed separately from each other in the vertical direction of the vertical frame portion 43. The engagement recess 75 has a circular shape in a front view and a tapered bottomed shape (trapezoidal shape) toward the outside of the vertical frame portion 43 in a cross-sectional view. The engagement recesses 75 are formed, for example, with an insertion opening diameter of 500 mm and a pitch of 3000 mm.

The mounting table part 42 has a plate-like shape extending in the lateral direction (horizontal direction) from the side of the mounting table support part 41 on the side of the ship 7. In the mooring position shown in FIGS. 2 and 3, the mounting table part 42 is located, for example, about 5 m below the sea level 8 and is separated from the bottom of the ship 7. With the rise of the mounting table support section 41, the mounting table section 42 mounts the ship 7 and supports the bottom of the ship 7. In the retracted position shown in FIGS. 4 and 5, the mounting table 42 is located, for example, about 10 m higher than the sea surface 8. Therefore, there is a height difference of about 15 m between the retracted position and the mooring position.

The guide pillar 45 has a columnar shape extending in the up-down direction, and is supported by a reinforcing pillar 46 that is erected obliquely with respect to the upper plate 21 of the platform 2. The guide pillar 45 has a U-shape in a plan view, and has a guide groove 45a whose opposite side is open. The support shaft 47 is supported by a support hole formed in the vertical frame portion 43 of the mounting table support portion 41. The roller portion 47b of the support shaft 47 is guided by the guide groove 45a of the guide column 45. Therefore, the mounting table supporting portion 41 of the gantry 5 can move vertically along the guide columns 45. According to this structure, the gantry 5 can be stably moved up and down with the vessel 7 placed on the pedestal portion 42.

The suspension member 86 has a movable end 86 a connected to the gantry-side connection portion 44 of the pedestal 5 and a fixed end 86 b connected to the fixed-side connection portion 48 of the platform 2. The hanging member 86 is preferably a chain for anchors in which elliptical parts are linearly connected. The chain has advantages over a wire rope such as being less stretchable, flexible and bendable, and preventing the fraying of a cut end and a clasping process.

The hanging member support body 83 has two chain sheaves (load sheaves) arranged between the movable end 86a and the fixed end 86b in a plan view, that is, the chain sheave 84a on the side of the movable end 86a and the fixed end 86b. Side chain wheel 84b. The two chain wheels 84 a and 84 b are pivotally supported by the suspension member support body 83. In the hanging member support body 83, the hanging member 86 is bridged in an inverted U shape, and the hanging member 86 meshes with the two chain wheels 84a and 84b. In the case of one chain wheel (load sheave), it is necessary to use one having a large diameter so as not to interfere with the gantry lifting cylinder 80 arranged below the hanging member support body 83. On the other hand, by disposing the two sheaves (load sheaves) 84a and 84b between the movable end 86a and the fixed end 86b in a plan view, a small sheave (load sheave) can be used. ..

The gantry lifting cylinder 80 is erected on the upper plate 21 of the platform 2. The gantry lifting cylinder 80 drives a piston in the cylinder 81 with a fluid such as hydraulic pressure to vertically drive a piston rod 82 attached to the piston. A suspension member support 83 is attached to the upper end of the piston rod 82, and the suspension member support 83 moves up and down as the piston rod 82 moves up and down.

The fixed-side connecting portion 48 to which the fixed end 86b of the hanging member 86 is connected is fixed to the upper plate 21 of the platform 2. At the same time, the gantry-side connection portion 44 to which the movable end 86a of the suspension member 86 is connected is connected to the mounting table support portion 41 that is vertically movable. Therefore, when the suspension member supporting body 83 is lifted by the driving of the gantry lifting cylinder 80, the movable end 86a and the gantry-side connecting portion 44 are lifted, and thereby the mounting table support portion 41 is lifted. That is, the mounting table 42 of the gantry 5 rises as the suspension member support 83 rises. The mounting table 42 of the gantry 5 is lifted to a retracted position at a height (for example, about 10 m from the sea level 8) that is not affected by the sea level rise. On the contrary, when the suspension member support body 83 is lowered by the driving of the gantry lifting cylinder 80, the movable end 86a and the gantry side connection part 44 are lowered, and thus the mounting table support part 41 is lowered. That is, as the suspension member support 83 descends, the mounting table 42 of the gantry 5 descends.

Since the fixed end 86b of the hanging member 86 is fixedly connected to the fixed side connecting portion 48 and the movable end 86a of the hanging member 86 is connected to the movable gantry side connecting portion 44, the hanging member support body 83 is , Behave like a moving pulley. For example, when the suspension member support body 83 is raised by about 8 m by driving the gantry lifting cylinder 80, the movable end 86a is raised by about 16 m, and the mounting table 42 of the gantry 5 is raised by about 16 m. That is, the movable end 86a and the mounting table 42 move with a movement amount that is twice the movement amount of the piston rod 82 of the lifting cylinder 80. Therefore, the amount of movement of the piston rod 82 of the gantry lifting cylinder 80 is smaller than the amount of movement of the movable end 86a, so that the gantry lifting cylinder 80 having a short stroke can be used.

As described above, when the suspending member support body 83 is moved up and down by the gantry lifting cylinder 80, the movable end 86a of the suspending member 86 moves up and down, and the mooring position where the ship 7 is moored in the watered state and the ship 7 is moved. The gantry 5 moves up and down between it and the retracted position that is not affected by sea level rise. When the hanging member support 83 is moved up and down by the gantry lifting cylinder 80, the movable end 86a connected to the gantry 5 rises, so that the gantry 5 rises from the mooring position to the retracted position. Therefore, when the sea level rises due to a high tide or a tsunami, the ship 7 can be safely moored by ensuring a sufficient lifting height of the ship bottom.

In particular, when the platform 2 is a pier installed on the ocean, the ship 7 can be moored at the pier at the evacuation position when the sea level rises due to high tides or tsunami, and the pier is temporarily separated and then returned to the pier again. The evacuation action is unnecessary.

[Structure of gantry lock device]
A gantry lock device 50c for locking and fixing the vertically moved gantry 5 is arranged on the upper plate 21 of the platform 2. The gantry lock device 50c functions as the lock device 50 and has the same configuration as the above-described upper lock device 50a and lower lock device 50b.

As shown in FIG. 6, the gantry lock device 50c includes a cylinder 51, a piston rod 52, a piston 55, and an engagement pin 56. The engagement pin 56 is a tapered engagement pin having a substantially truncated cone shape. That is, the engagement pin 56 has a circular shape in a front view, and also has a shape in which a mountain shape of the pin tip 57 is added to a tapered taper shape (trapezoidal shape) toward the engagement recess 75 in a sectional view. doing. The gantry lock device 50c is watertightly configured by a seal structure 53 having a seal member 54.

The gantry lock device 50c drives the piston 55 with a fluid such as hydraulic pressure to drive the engagement pin 56 attached to the tip of the piston 55 in the horizontal direction (lateral direction). When the engagement pin 56 is driven toward the engagement recess 75 formed in the vertical frame portion 43, the tapered engagement pin 56 projects and is press-fitted into the tapered engagement recess 75 to be engaged. At this time, the engaging convex surface 58 of the engaging pin 56 closely engages with the engaging concave surface 76 of the engaging concave portion 75 in a circumferential surface shape. This increases the engagement contact area between the engagement pin 56 and the engagement recess 75, and facilitates the positioning of the engagement between the engagement pin 56 and the engagement recess 75. The lock fixing by the gantry lock device 50c can be reliably performed. When the engagement pin 56 is driven to the side opposite to the engagement recess 75, the engagement pin 56 retracts and becomes disengaged from the engagement recess 75. At this time, the engaging convex surface 58 of the engaging pin 56 is disengaged from the engaging concave surface 76 of the engaging concave portion 75.

The slope of the engagement convex surface 58 of the engagement pin 56 is configured to be larger than the slope of the engagement concave surface 76. For example, the inclination of the engagement convex surface 58 is 15 degrees, and the inclination of the engagement concave surface 76 is 14 degrees. In other words, the taper angle of the engagement convex surface 58 is 30 degrees, and the taper angle of the engagement concave surface 76 is 28 degrees. According to this configuration, since the engagement convex surface 58 engages with the insertion opening portion outside the engagement concave surface 76, even if the engagement pin 56 is reduced in diameter due to wear with the engagement concave portion 75, the engagement pin 56. Can be further projected toward the inside of the engagement recess 75 and press-fitted, so that the gantry lock device 50c can be used for a long period of time.

As shown in FIG. 6, in the engaged state, there is a gap between the pin tip 57 of the engaging pin 56 and the rear side portion of the engaging recess 75 formed in the vertical frame portion 43. .. According to this configuration, even if the engagement pin 56 is reduced in diameter due to wear with the engagement recess 75, the engagement pin 56 can be further projected toward the inner side of the engagement recess 75 and press-fitted. The gantry lock device 50c can be used for a long period of time.

Although specific embodiments of the present invention have been described, the present invention is not limited to the above-described embodiments, and various modifications can be implemented within the scope of the present invention.

The legs 3 are not limited to four arranged at the four corners of the platform 2 and may be composed of six or eight. Further, the height and diameter of the leg 3 can be appropriately determined depending on the size of the platform 2. In addition, when the size of the platform 2 is large and the platform 2 cannot be sufficiently supported only by the legs 3, a pile (not shown) may be placed between the legs 3 to be installed. It is also possible to replace the leg 3 with a pile while the platform 2 is supported by the leg 3 and the pile and use the replaced leg 3 for another work platform 1. At this time, a pile can be inserted and installed also in the guide hole where the leg 3 was arranged.

The plurality of engaging recesses 75 may be continuously formed in the vertical direction of the vertical frame portion 43. With this configuration, the vertical position (height) of the gantry 5 can be easily determined by slightly moving the mounting table support portion 41 in the vertical direction. Further, the place where the plurality of engaging recesses 75 are formed is not limited to the vertical frame portion 43. The plurality of engaging recesses 75 may be formed in the vertical direction in any part of the mounting table supporting portion 41 of the gantry 5.

The present invention and embodiments are summarized as follows.

The gantry lifting device 6 for a ship according to one aspect of the present invention is
A platform elevating device 6 for a ship, which is provided on the platform 2 and elevates a platform 5 on which the ship 7 is placed and supported,
The platform elevating device 6 for the ship is
A suspension member 86 having a movable end 86a connected to the pedestal 5 and a fixed end 86b connected to the platform 2;
A suspension member support 83 on which the suspension member 86 is bridged in an inverted U shape;
And a gantry lifting cylinder 80 for lifting and lowering the hanging member support body 83,
When the suspension member support body 83 is moved up and down by the gantry lifting cylinder 80, the movable end 86a of the suspension member 86 moves up and down, so that the boat 7 is moored in a moored state and the boat 7 It is characterized in that the pedestal 5 moves up and down between the pedestal 5 and a retracted position that is not affected by sea level rise.

According to the above configuration, when the hanging member support body 83 is moved up and down by the gantry lifting cylinder 80, the movable end 86a connected to the gantry 5 is lifted, so that the gantry 5 is lifted from the mooring position to the retracted position. Therefore, when the sea level rises due to a high tide or a tsunami, the ship 7 can be safely moored by ensuring a sufficient lifting height of the ship bottom.

In addition, in the gantry lifting device 6 for a ship of one embodiment,
By fitting the tapered engagement pin 56 of the gantry lock device 50c provided on the platform 2 into the tapered engagement recess 75 provided on the pedestal 5, the pedestal 5 is locked and fixed. To be done.

According to the above-described embodiment, the engagement pin 56 of the gantry lock device 50c easily engages with the engagement recess 75 of the gantry 5, and the engagement contact area between the engagement pin 56 and the engagement recess 75 is large. Since it becomes large, the pedestal lock device 50c can be securely locked.

In addition, in the gantry lifting device 6 for a ship of one embodiment,
The hanging member 86 is a chain.

According to the above-described embodiment, the chain has advantages over a wire rope such as being less stretchable, being flexible and capable of being curved, preventing fraying of a cut end, and requiring no clasping treatment.

In addition, in the gantry lifting device 6 for a ship of one embodiment,
The suspension member support includes a chain wheel 84a on the movable end side and a chain wheel 84b on the fixed end side that mesh with the chain.

According to the above-described embodiment, a small diameter sheave can be used by disposing the sheave 84a on the movable end side and the sheave 84b on the fixed end side.

In addition, in the gantry lifting device 6 for a ship of one embodiment,
The gantry 5 includes a mounting table portion 42 on which the ship 7 is mounted, and a mounting table support portion 41 that supports the mounting table portion 42, and the mounting table support portion 41 is erected on the platform 2. Guided by the guide pillar 45.

According to the above-described embodiment, the gantry 5 can be stably moved up and down with the vessel 7 placed on the pedestal portion 42.

In addition, in the gantry lifting device 6 for a ship of one embodiment,
The platform 2 is a jetty installed offshore.

According to the above-described embodiment, when the sea level rises due to a high tide or a tsunami, the ship 7 can be moored at the pier at the evacuation position, and the evacuation action of temporarily leaving the pier and then returning to the pier again becomes unnecessary.

In addition, in the gantry lifting device 6 for a ship of one embodiment,
The platform 2 is self-elevating.

According to the above-described embodiment, by erected the platform 2 at a position higher than the sea surface 8, the platform 2 is less likely to be affected by waves and the like and less likely to be shaken.

1... Workbench
2... Platform 3... Leg 4... Leg lifting device 5... Frame 6... Frame lifting device 7... Ship 8... Sea surface 9... Sea bottom 21... Top plate 22... Bottom plate 23... Side plate 24... Partition plate 31... Engagement surface 35... Engagement Fitting recess 41... Mounting base support 42... Mounting base 43... Vertical frame 44... Frame side connection 45... Guide post 45a... Guide groove 46... Reinforcing post 47... Support shaft 47a... Shaft 47b... Roller 48... Fixed side connection portion 50... Lock device 50a... Upper lock device 50b... Lower lock device 50c... Stand lock device 51... Cylinder 52... Piston rod 53... Seal structure 54... Seal member 55... Piston 56... Engagement pin 57... Pin Tip 58... Engaging convex surface 60... Leg raising/lowering cylinder 75... Engaging concave portion 76... Engaging concave surface 80... Stand raising/lowering cylinder 81... Cylinder 82... Piston rod 83... Hanging member support 84a... Chain wheel 84b on the movable end side... Chain wheel 86 on the fixed end side... Chain (hanging member)
86a... Movable end 86b... Fixed end

Claims (6)

A platform elevating device for a ship, which is provided on a platform and which elevates and lowers a platform for mounting and supporting the ship,
The platform lifting device for the ship is
A suspension member having a movable end connected to the gantry and a fixed end connected to the platform;
A suspension member support body in which the suspension member is bridged in an inverted U shape;
A gantry elevating cylinder for elevating the hanging member support,
A gantry lock device provided on the platform ,
When the hanging member support is raised and lowered by the gantry lifting cylinder, the movable end of the hanging member moves up and down, and the mooring position at which the ship is moored in a watered state and the influence of sea level rise on the ship. The pedestal moves up and down between the retracted position and
In the retracted position, the engagement convex surface of the tapered engagement pin of the gantry locking device closely engages with the tapered engagement concave portion provided on the gantry in a circumferential shape, A gantry lifting device for ships, wherein the gantry is locked and fixed . The lifting device according to claim 1 , wherein the suspending member is a chain in which elliptical parts are linearly connected . The suspension member support is meshed with the chain, and having a load sheave side of the fixed end to the side of the load sheave of the movable end, lifting apparatus according to claim 2. The gantry includes a pedestal part on which the ship is placed, and a pedestal support part that supports the pedestal part, and the pedestal support part is guided by a guide pillar that is erected on the platform. The lifting device according to any one of claims 1 to 3 , wherein the lifting device is a lifting device. The lifting device according to any one of claims 1 to 4 , wherein the platform is an offshore structure erected on the ocean . The lifting device according to any one of claims 1 to 5 , wherein the platform is provided on a self-lifting work platform ship .

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