JPH09189019A - Ship impact force absorbing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a repeatedly usable damping device which is less in reaction when a ship collides with a fixed structure and large in collision energy absorbing capability. SOLUTION: A collision preventing plate 2 is arranged swingably, with its lower end jointed to a quay 1 through a hinge 4, in front of the quay 1, an oil damper 3 containing gas which is arranged on the upper surface 1b of the quay 1 is connected operably to the upper end of the collision preventing plate 2, and a net 17 and a float 18 are arranged on the front surface of the collision preventing plate 2. Also the collision preventing plate 2 absorbs an energy generated when a ship collides with the collision preventing plate 2 primarily by the net 17 and float 18, absorbs it secondarily by the cooperation of the oscillation of the collision preventing plate 2 and retracting movement of the oil damper 3 and, after coilision, returns the oil damper 3 and collision preventing plate 2 to their original positions by gas pressure for preparations of the next collision.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ship impact absorption device which is installed in a fixed structure such as a quay, a breakwater, a pier, a ship port support facility, and the like to protect the ship itself or the fixed structure from a shock at the time of a ship collision. Regarding

[0002]

2. Description of the Related Art Conventionally, a fender, which is usually made of an elastic material such as rubber, is installed on a quay, a breakwater, a pier, etc., and the collision energy of a ship is absorbed by the deformation of the fender. Further, in recent years, in order to allow ships to safely enter the harbor during stormy weather or when visibility is poor, it is becoming more common to provide ship entry support facilities along the route inside the breakwater, for example, Japanese Patent Laid-Open No. 2-128007. In the gazette, a platform is provided on a plurality of steel pipe support piles, a fender is attached to a so-called pile-type dolphin, and the energy of a ship collision is generated by elastic deformation of the fender and horizontal displacement of the columns. I try to absorb it.

[0003]

However, since the above-mentioned conventional fender only uses the deformation of the elastic body, its energy absorption capacity is small and the reaction force at the time of collision is very large. Then, when the ship collides at high speed, there is a problem that the ship itself and the fixed structure are unavoidably damaged. Further, according to the ship entry support facility described in the above publication, since the fender has a small energy absorbing capacity as described above, the absorption of the collision energy depends exclusively on the horizontal displacement of the supporting column, and the amount of collision of the supporting column is accordingly increased. There is a problem in that the number of constructions must be increased and large-scale columns must be used, and the construction period and construction cost required to construct the facility cannot be avoided. There is a concept that the fender is composed of a steel shell shell to enhance the energy absorption capacity, but in this case, the fender will be crushed due to a collision with the ship, so it cannot be used repeatedly, Its use had to be abandoned.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a ship impact force capable of being repeatedly used, which has a small reaction force at the time of a collision and a large ability to absorb collision energy. It is to provide an absorption device.

[0005]

In order to achieve the above object, the present invention has a lower end portion hinged to the fixed structure in front of the surface of the fixed structure on the ocean side so as to swing the defense plate. It is arranged such that it can be disposed, and the upper end portion of the anti-shock plate is operatively connected to a gas-filled oil damper extending from the fixed structure.

In the ship impact force absorbing device configured as described above, the anti-shock plate receives the ship, and the impact load applied to the ship is transmitted to the oil damper to absorb the collision energy. Then, after the ship separates from the anti-deflection plate, the oil damper returns to its original state due to the gas pressure, and the anti-deflection plate also automatically returns to its original state.

In the present invention, a net or a float may be arranged on the front surface of the impact-proof plate, whereby the ability to absorb collision energy is further enhanced.

In the present invention, the oil damper is
An outer cylinder and an inner cylinder that is slidably inserted into the outer cylinder and has an orifice passage at an insertion end are provided, and oil in the outer cylinder is introduced through the orifice passage in accordance with the shortening movement of the inner cylinder. The gas may flow into the cylinder and the gas in the inner cylinder may be compressed.

According to the present invention, in the above oil damper, it is desirable to dispose a taper pin in the outer cylinder that gradually reduces the orifice passage area in accordance with the shortening movement of the inner cylinder. The oil damper can be operated at a relatively high speed to reduce the reaction force applied to the ship.

A free piston may be slidably disposed in the inner cylinder, and gas may be contained in one chamber in the inner cylinder defined by the free piston. In this case, the oil and the gas are completely separated, so that the oil damper can be placed horizontally.
In addition, when placed horizontally, it is possible not only to prevent an unbalanced load from being applied to the damper outer cylinder, but also to prevent abnormal wear compared to when placed horizontally.

Further, an annular chamber is formed between the outer cylinder and the inner cylinder, and the annular chamber is communicated with an oil chamber in the outer cylinder by a communication passage, and the communication passage is provided when the inner cylinder is shortened. A configuration may be adopted in which the communication passage is largely opened and a valve element that operates so as to reduce the opening area of the communication passage when the inner cylinder is extended is interposed. In this case, when the inner cylinder extends after being shortened, the oil in the annular chamber flows into the outer cylinder through the narrow communication passage, so that the hydraulic pressure in the annular chamber acts as a resistance to reduce the restoring speed of the inner cylinder.

Further, an oil lock chamber communicating with the annular chamber is formed between the outer cylinder and the inner cylinder, and the oil lock is provided at the opening end of the outer cylinder and the outer circumference of the inner cylinder near the extended end of the inner cylinder. A configuration may be provided in which a sealing unit that cooperates to seal the chamber is provided. In this case, since the inner cylinder does not mechanically collide with the outer cylinder when the inner cylinder extends, the inner cylinder can be restored smoothly.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 and 2 show a first embodiment of the present invention. The first embodiment is applied to the berthing area of a ship, and an anti-corrosion plate 2 to be described later is arranged in front of the surface (front surface) 1a on the ocean side of the quay 1 as a fixed structure. At the same time, a gas-filled oil damper 3 described in detail later is arranged on the upper surface 1b. Defense plate 2
Is connected to the front surface 1a of the quay 1 via hinges 4 at two positions in the width direction at the lower end thereof, and can swing in the direction of the normal to the front surface 1a of the quay 1. On the other hand, the oil damper 3 is provided with an outer cylinder 6 whose one end is connected to the upper surface 1b of the quay 1 via a hinge 5, and an inner cylinder 7 slidably inserted into the outer cylinder 6. The base end of the tube 7 is connected to the center of the upper end of the barrier plate 2 in the width direction via a hinge 8. The oil damper 3 is adapted to always maintain the extended state in which the inner cylinder 7 is extended by the internal gas pressure, and thus the defense plate 2 is always provided with the front surface 1a of the quay 1.
It is positioned such that the upper part thereof is inclined forward by a predetermined angle.

A pair of slide guides 9 are arranged on the upper surface 1b of the quay 1 with the oil damper 3 interposed therebetween, and each slide guide 9 has a rectangular frame 10 arranged below the oil damper 3. A slider 11 rotatably supporting one end of is mounted slidably. The other end of the frame body 10 is connected to the upper end of the defense plate 2 via a hinge 12, so that when the defense plate 2 swings around the hinge 4 at the lower end, the movement of the frame body 10 is prevented. It is adapted to be transmitted to the slider 11 via. The frame body 10 has a rigid body structure in which a large-diameter main frame 10a is arranged on four sides and a small-diameter subframe 10b is bridged between the left and right main frames 10a (FIG. 1). As a result, the barrier plate 2 can be stably swung without tilting in the left-right direction along the front surface 1a of the quay 1. In addition, around the oil damper 3 and the slide guide 9,
A protective wall 13 is installed as a safety measure.

Here, as shown in FIG. 3, the barrier plate 2 has a frame shape in which a plurality of hollow vertical frames 14 (three in this case) are bridged with hollow horizontal frames 15 at the upper and lower ends thereof. The inside of the frame is partitioned into trusses by beam members 16 bridged between the vertical frames 14 and between the vertical frames 14 and the horizontal frames 15. Then, members (large diameter round steel) 22 for transmitting the impact force of the ship are arranged at regular intervals on the front surface of the anti-corrosion plate 2, and a net 17 made of aramid fiber is stretched on the front surface of the member 22. In front of this net 17, as a fender,
A float 18 made of an elastic body is arranged.

The net 17 is provided above the barrier plate 2, projecting from the lower horizontal frame 15, bridged between a pair of lower support columns 19, and a predetermined space between the lower support members 20 (FIG. 2). It is stretched to generate tension. The upper and lower support members 20 are reinforced by a reinforcing member 21 extending from the vertical frame 14. On the other hand, as shown in FIG. 4, the float 18 is formed of a steel pipe core material 18a, a rubber cylindrical member 18b fitted to the core material 18a, and a predetermined thickness around the cylindrical member 18b. Foam 18c and this foam 18c
A core material 18d for covering the periphery of the core material and a rubber end plate 18e for covering both end surfaces of the foamed body 18c.
8a through the chain 23 extending from both ends
Is moored at the lower end of.

The gas-filled oil damper 3 is shown in FIGS.
8, the bottom of the outer cylinder 6 is sealed by the end plate 24 of another member, and the bottom of the inner cylinder 7 is sealed by the end plate 25 of another member. An orifice 26 is formed in the end plate 25 of the inner cylinder 7, while the other end of a taper pin 27 having one end fixed to the end plate 24 of the outer cylinder 6 is inserted into the orifice 26. The taper pin 27 has a smaller diameter as it goes away from the end plate 24, and the passage area of the orifice 26 decreases as the insertion depth into the orifice 26 increases. Further, the end plate 24 of the outer cylinder 6 is formed with a fluid passage 28 that communicates the inside and the outside of the outer cylinder 6 (FIG. 8), and a valve unit 29 connected to the passage 28 is formed on the outer peripheral surface of the end plate 24. Installed. The gas passage 28 and the valve unit 29 are for injecting gas into the oil damper 3, and a gas cylinder (not shown) is connected to the valve unit 29 if necessary.

On the other hand, a ring guide 30 is attached (welded and fixed) to the upper end opening of the outer cylinder 6, and the inner cylinder 7 is extended by slidably inserting the ring guide 30. A container 31 that communicates with the inner cylinder 7 and has a larger diameter than the inner cylinder 7 is connected to the base end opening of the inner cylinder 7. The container 31 is provided with an injection port 32, and a predetermined amount of oil 33 is supplied into the oil damper 3 through the injection port 32. Further, the container 31 is provided with a gas pressure adjusting valve 34. When injecting gas into the oil damper 3 through the valve unit 29 and the fluid passage 28, the gas pressure adjusting valve 34 replaces the air accumulated inside with the gas and adjusts the gas pressure to a predetermined value. To be operated. As the gas used here, it is desirable to use an inert gas such as nitrogen gas or argon gas in order to prevent deterioration of the oil 33 due to oxygen.

On the front end side of the inner cylinder 7 inserted into the outer cylinder 6,
Two seal rings 36 are fitted to each other in the axial direction with a spacer 35 therebetween (FIGS. 6 and 7). Each seal ring 36 is in sliding contact with the inner surface of the outer cylinder 6 via an O-ring 37 fitted in each circumferential groove, thereby preventing the oil 33 from leaking between the outer cylinder 6 and the inner cylinder 7. Has been done. Since the inner cylinder 7 is in sliding contact with the inner surface of the outer cylinder 6 via the two seal rings 36 provided apart from each other as described above, the inner cylinder 7 can be stably slid even if the expansion / contraction distance is long.

On the end face of the end plate 24 of the outer cylinder 6 and the end face of the container 31, hinge brackets 38 and 39 constituting the above-mentioned hinge 5 and hinge 8 are provided, respectively, and the oil damper 3 has these hinge brackets. 38, 39
Is installed by field assembly between the upper surface 1b of the quay 1 and the upper end of the barrier plate 2 so that the base end side (container 31 side) of the inner cylinder 7 is inclined upward. After this installation, the oil 33 and the gas are injected into the oil damper 3 through the injection port 32 and the fluid passage 28. The oil 33 flows through the orifice 26 of the end plate 25 of the inner cylinder 7 into the oil inside the outer cylinder 6. The gas moves to the chamber 6a and the gas flows through the orifice 2.
It moves to the inside of the inner cylinder 7 through 6, and the inner cylinder 7 comes to be positioned at the extension end by the gas pressure (FIG. 5). A part of the gas injected from the fluid passage 28 into the oil damper 3 collects in the upper corner between the end plate 25 of the inner cylinder 7 and the inner surface of the outer cylinder 6, and this gas is sealed by the seal ring 36. It is configured to be guided into the inner cylinder 7 through a passage 36a provided in the inner cylinder 7 and a through hole 7a (FIG. 7) provided in the inner cylinder 7. Also, the inner cylinder 7
Boots B are arranged around the boots as needed (FIG. 5).

Hereinafter, the operation of the ship impact force absorbing device constructed as described above will be described with reference to FIG.

The anti-corrosion plate 2 is positioned so as to be inclined forward by a predetermined angle α with respect to the front surface 1a of the quay 1 by the extension of the gas-filled oil damper 3, while the float 1 is
8 is located at the current tide between the high and low tides HWL and LWL. And now, this defense plate 2
On the other hand, when the boat S approaches abnormally, first, the vicinity of the water line of the boat S collides with the float 18, the float 18 elastically deforms, the net 17 bends, and the energy of the collision is temporarily absorbed. At this time, the contact position of the float 18 with the ship S is near the center of gravity of the ship S, so that the ship S does not tilt significantly at the first collision.

When the elastic deformation of the float 18 reaches the limit, a large impact load is applied to the inner cylinder 7 of the oil damper 3 via the anti-corrosion plate 2. As a result, the oil 33 in the oil chamber 6a in the outer cylinder 6 of the oil damper 3 flows to the inner cylinder 7 side through the orifice 26, and the energy of collision is absorbed by this fluid flow. The inner cylinder 7 shortens in accordance with the magnitude of the impact load, but initially the small diameter portion of the taper pin 27 is located inside the orifice 26 and the passage area of the orifice 26 is large, so the shortening speed of the inner cylinder 7 is small. That is, the rocking speed of the barrier plate 2 is high, and therefore the ship S
The reaction force applied to the ship is small, and the ship S does not tilt greatly. When the collision load is large, the inner cylinder 7 is greatly shortened, the passage area of the orifice 26 is gradually reduced in accordance with this shortening, and finally the orifice 26 is closed by the taper pin 27 and the inner cylinder 7 reaches the shortened end. However, by this stage, the energy of the collision has been sufficiently absorbed and the ship S
Does not collide with the quay 1, and the destruction of the ship S or the quay 1 is prevented. Then, when the ship S separates from the anti-deflection plate 2, the inner cylinder 7 extends due to the gas pressure in the oil damper 3, and the anti-defense plate 2 automatically returns to the original forward tilt position to prepare for the next collision. . In addition, the forward inclination angle α of the anti-deflection plate 2 is, for example, 10 to 15 degrees, and the operation distance (stroke) of the oil damper 3 is, for example, 1.5 to 15.
The size is set to 3.0 m.

In the first embodiment described above, one oil damper 3 is combined with one impact plate 2, but the number of oil dampers 3 is arbitrary and the number of the impact plate 2 is not limited. When the width is wide, it is desirable to use two or more. In addition, when the above-mentioned ship impact force absorbing device is installed on the berth dedicated to the berthing of the ship, the ship can be consciously applied to the barrier plate 2 and stopped safely, which is extremely useful as a rapid berthing facility. Become.

FIG. 10 shows a second embodiment of the present invention. In the figure, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted here. The second embodiment is applied to a ship entry support facility, and in this case, a pile type dolphin 40 constructed on the sea is used as a fixed structure. The dolphin 40 includes a plurality of steel pipe support piles 42 placed on a raw ground 41 on the seabed, and a pedestal 43 installed on the support piles 42.
The gas barrier oil plate 3 is hinged to the middle of the support pile 42, and the gas-filled oil damper 3 operatively connected to the upper end of the barrier plate 2 is hinged on the mount 43.

By installing the dolphin 40 in combination with the dolphin 40 along the route inside the breakwater as described above, when the ship S tries to enter the port out of the route due to bad weather or poor visibility, the barrier plate 2 is used. When it hits, it blocks its way and guides the vessel S safely along the route. At this time,
The collision energy of the ship S with respect to the anti-deflection plate 2 is the first
The oil damper 3 absorbs most of the oil as in the embodiment described above, so that the dolphin 40 as well as the ship S is prevented from being broken. As a result, most of the collision energy is absorbed by the oil damper 3, so that the support piles 42 forming the dolphin 40 do not need to be so large, and the number thereof can be reduced, so that a ship entry support facility can be constructed. It will be easy.

11 to 13 show a third embodiment of the present invention. In the figure, the same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted here. The feature of the third embodiment is that the barrier plate 2 is installed in the vertical direction, while the gas-filled oil damper 3 has a special internal structure described later (FIGS. 17 to 19). The point is that it can be placed horizontally. For this reason, the barrier plate 2 has a structure in which two mounting arms 50 extending from the back surface thereof at right angles are provided at two lower portions in the width direction, and the tip end of the mounting arm 50 is provided so as to project from the front surface 1a of the quay 1. By connecting to the platform 51 via the hinge 4, a sufficient gap necessary for rocking is maintained between the platform 51 and the front surface 1a of the quay 1. On the other hand, oil damper 3
Is horizontally placed on a mount 52 provided on the upper surface 1a of the quay 1, and one end of the outer cylinder 6 is connected to the mount 52 via a hinge 5, and the base end of the inner cylinder 7 is connected to the above-mentioned protection. Impact plate 2
Is connected to the center of the upper end of the width direction via a hinge 8.

A slide stage 53 is arranged on the frame 52 so as to be movable along the oil damper 3.
The slide stage 53 is for a worker who performs maintenance to walk, and as shown in FIGS. 14 to 16, the traveling wheels 55 that roll in a pair of left and right guide frames 54 installed on the pedestal 52. And a guide roller 56 that rolls on the side walls of the left and right guide frames 54, and a handrail 57. Slide stage 53
The position is fixed by fitting a wing nut 59 rotatably provided on the guide frame 54 into a U-shaped groove (not shown) of the stopper piece 58 provided on the upper surface of the quay 1, and the position of the wing nut 59 is fixed at all times. It is positioned at the retracted end that does not protrude from the front surface 1a. The pedestal 52 is provided with a staircase 52a and a protective fence 52b.

Here, in the gas-filled oil damper 3 used in the third embodiment, as shown in FIGS. 17 to 19, the free piston 60 is slidable in the inner cylinder 7. Gas is contained in one chamber (gas chamber) 7a in the inner cylinder 7 defined by the free piston 60. The sealing device 61, which is attached to the open end of the outer cylinder 6 and guides the inner cylinder 7 in a liquid-tight manner, includes a support cylinder 62 fitted and fixed to the outer cylinder 6, and a bolt 6 attached to the support cylinder 62.
3 is composed of a double lid 64 fixed and a bush 65 held in the double lid 64 (see FIG. 1).
8). Between the support cylinder 62 and the double lid 64 and the double lid 64
Are sealed with an O-ring 66, and the double lid 64 and the inner cylinder 7 are sealed with an oil seal 67 to prevent oil leakage from between the outer cylinder 6 and the inner cylinder 7.

On the other hand, an annular piston 69 having a plurality of through holes 68 in the circumferential direction is fitted to the tip of the inner cylinder 7 inserted into the outer cylinder 6 (FIG. 19). This piston 6
9 has one end abutted against a step 70 formed on the outer circumference of the inner cylinder 7, and the other end is pressed by the end plate 25 screwed to the tip end of the inner cylinder 7 to restrict the movement in the axial direction. ing. The position of the end plate 25 is fixed by a set screw 71 whose tip is engaged with the outer peripheral surface of the inner cylinder 7. A spacer 72 is fitted to the inner cylinder 7,
One end of the spacer 72 is brought into contact with a step 73 (FIG. 18) formed on the outer circumference of the inner cylinder, and the other end (tip) is pressed by the piston 69 to restrict movement in the axial direction. . An annular chamber 74 is provided between the spacer 72 and the outer cylinder 6, and a through hole (communication passage) 68 provided in the piston 69 is provided between the annular chamber 74 and the oil chamber 6a in the outer cylinder 6. It is in communication.

The piston 69 has a small diameter portion 69a at a portion following the portion where the through hole 68 is provided.
A ring-shaped valve body 75 is slidably fitted to 9a. The ring-shaped valve body 75 is restricted from coming off from the small diameter portion 69a by the spacer 72, and the small diameter portion 69a is prevented.
It can move freely in the axial direction within the length range of. Therefore, the outer diameter of the valve body 75 is the same as the through holes 6
It is set so as to be slightly smaller than the pitch circle connecting the outer vertices of 8, so that even if the valve body 75 moves forward, the through hole 68 is not completely closed, and the annular chamber 74 and the outer cylinder are not closed. The communication with the oil chamber 6a in 6 is always maintained.

As shown in FIG. 18, on the outer circumference of one end (rear end) of the spacer 72 fitted to the inner cylinder 7, there is provided an annular projection 76 which slightly contacts the inner peripheral surface of the outer cylinder 6, as shown in FIG. A tapered portion 77 that extends from the projection 76 to the rear end is provided.
Further, a taper portion 78 that can be fitted into the taper portion 77 of the spacer 72 is provided on the inner periphery of the double lid 64. The spacer 72 has a tapered portion 77 near the extension end of the inner cylinder 7.
Is fitted into the taper portion 78 of the double lid 64, whereby a closed oil lock chamber 79 is provided around the stepped portion 73 of the inner cylinder 7.
Is formed. Incidentally, 80 is the annular chamber 7
4 is an injection port for replenishing oil, which is normally plug 8
It is sealed with 1. Also, this oil damper 3
Then, the fluid passage 28 (FIG. 8) provided in the end plate 24 of the outer cylinder 6 serves as an oil inlet and serves as a container 31 at the base end of the inner cylinder 7.
The inlets 32 (FIG. 5) provided in the above are used as inlets for gas, respectively.

In the third embodiment, the barrier plate 2 is used.
When the ship S collides with, the collision energy is
As in the first embodiment, it is temporarily absorbed by the elastic deformation of the float 18 and the bending of the net 17.
At this time, since the barrier plate 2 is arranged vertically, the upper part of the ship S maintains a slight distance from the barrier plate 2 and not only reduces the oppressive feeling given to the operator, but also the passenger compartment. The adverse effect is prevented. Then, when the elastic deformation of the float 18 reaches near the limit, the inner cylinder 7 of the oil damper 3 is gradually shortened by being pushed by the barrier plate 2, and similarly the oil 33 in the oil chamber 6a of the outer cylinder 6 becomes the orifice. It flows to the inner cylinder 7 side through the passage 26, and the collision energy is absorbed. At this time, the inner cylinder 7
The free piston 60 inside moves to the base end side of the inner cylinder 7, the volume of the gas chamber 7a is reduced, and the gas is compressed. At the same time, the valve body 75 is displaced toward the spacer 72 side by the oil pressure of the oil chamber 6a, the through hole 68 in the piston 69 is largely opened, and the oil 33 in the oil chamber 6a is also transferred to the annular chamber 74 through the through hole 68. Inflow. The passage area of the orifice 26 is gradually reduced by the taper pin 27 in accordance with the shortening movement of the inner cylinder 7 as in the first embodiment.

In the third embodiment, since the gas chamber 7a is completely separated from the oil chamber by the free piston 60, even if the oil damper 3 is placed horizontally, its function is not impaired. When the oil damper 3 is placed horizontally as described above, the maximum stroke of the inner cylinder 7 is the same as in the case where the oil damper 3 is tilted upward as in the first embodiment. , Defense plate 2
The swing angle, that is, the amount of horizontal displacement of the hinge 8 connecting the oil damper 3 and the anti-deflection plate 2 increases. In other words, if the horizontal displacement amount of the hinge 8 is set to the same value, the maximum stroke can be set smaller when the oil damper 3 is placed horizontally than when the oil damper 3 is tilted upward. Miniaturization can be achieved. By the way,
When the horizontal displacement of the hinge 8 is 2 m, the total length of the oil damper 3 in the third embodiment is 6.7 m.
On the other hand, the total length of the oil damper 3 in the first embodiment is 7.5 m. In addition, in the third embodiment, the direction of the oil damper 3 may be reversed.

Then, when the ship S leaves the anti-deflection plate 2,
The free piston 60 moves forward due to the gas pressure in the gas chamber 7a, so that the oil 33 in the inner cylinder 7 moves toward the orifice passage 26.
Through to the oil chamber 6a in the outer cylinder 6, and the inner cylinder 7 extends. Due to the expansion of the inner cylinder 7, the volume of the annular chamber 74 between the inner cylinder 7 and the outer cylinder 6 is reduced, the hydraulic pressure in the annular chamber 74 is increased, and the valve body 75 is displaced forward, so that the piston 69 The opening area of the through hole 68 is reduced. As a result, the annular chamber 7
The outflow of oil from the oil cylinder 4 to the oil chamber 6a in the outer cylinder 6 is restricted, the expansion speed of the inner cylinder 7 that is rapidly expanded due to gas pressure is reduced, and the impact given to the oil damper 3 is mitigated. Then, when the inner cylinder 7 reaches the vicinity of the extended end, the tapered portion 77 of the rear end portion of the spacer 72 and the tapered portion 78 of the double lid 64 (sealing means) are fitted to each other, and the oil lock chamber 7
Since the oil is contained in the inner cylinder 7, the inner cylinder 7 is prevented from mechanically colliding with the outer cylinder 6 (sealing device 61),
Will return smoothly.

[0037]

As described above in detail, according to the ship impact force absorbing device of the present invention, the swingable anti-collision plate and the oil damper are combined to absorb a large collision energy. By installing this on a fixed structure, it is possible to prevent damage not only to the fixed structure but also to the ship. Further, since the oil damper containing gas is used, it is automatically restored after the collision due to the gas pressure, and can be repeatedly used permanently, and its utility value is high.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a structure of a ship impact force absorption device according to a first embodiment of the present invention.

FIG. 2 is a side view showing the device shown in FIG. 1 as a partial cross-section.

FIG. 3 is a front view showing a structure of an impact-proof plate used in the first embodiment.

FIG. 4 is a side view showing the structure of the float used in the first embodiment as a partial cross section.

FIG. 5 is a sectional view showing the overall structure of a gas-filled oil damper used in the first embodiment.

FIG. 6 is an enlarged cross-sectional view showing a part of the oil damper shown in FIG.

FIG. 7 is an enlarged sectional view of a portion A in FIG. 6;

8 is a cross-sectional view showing an enlarged part of the oil damper shown in FIG.

FIG. 9 is a schematic diagram showing an operating state of the ship impact force absorbing device according to the first embodiment.

FIG. 10 is a side view showing a structure of a ship impact force absorption device according to a second embodiment of the present invention.

FIG. 11 is a side view showing a partial cross-section of the structure of a ship impact force absorbing device according to a third embodiment of the present invention.

12 is a plan view of the device shown in FIG.

13 is a sectional view taken along the line BB of FIG.

FIG. 14 is a front view of a slide stage used in the third embodiment.

FIG. 15 is a cross-sectional view of a slide stage used in the third embodiment.

16 is a cross-sectional view taken along the line C-C of FIG.

FIG. 17 is a cross-sectional view showing a main structure of an oil damper used in the third embodiment.

FIG. 18 is a cross-sectional view showing an enlarged part of the oil damper shown in FIG.

19 is a cross-sectional view showing an enlarged part of the oil damper shown in FIG.

[Explanation of symbols]

 1 Quay (fixed structure) 2 Dam plate 3 Gas damper 6 Outer cylinder 7 Inner cylinder 17 Net 18 Float 26 Orifice 27 Taper pin 40 Pile type dolphin (fixed structure) 60 Free piston 68 Piston through hole (communication passage) ) 74 annular chamber 75 valve body 77, 78 taper portion (sealing means) 79 oil lock chamber

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Manabu Okada 4-1-1 Koraibashi, Chuo-ku, Osaka-shi, Toyo Construction Co., Ltd. (72) Toshiharu Yoshida 4-1-1 Koraibashi, Chuo-ku, Osaka-shi, Osaka No. 1 Toyo Construction Co., Ltd. (72) Yasushi Yumiyama 4-1-1 Koraibashi, Chuo-ku, Osaka-shi, Osaka Prefecture Toyo Construction Co., Ltd. (72) Inventor Masayoshi Kubo 9-11 Kasugadai, Nishi-ku, Kobe-shi, Hyogo No. 27 (72) Inventor Toru Sasaki 3 22-1 Furuedai, Suita City, Osaka Prefecture (72) Inventor Katsuhiko Saito 3-10-23-1, Kita Aoki, Higashinada-ku, Kobe City, Hyogo Prefecture (72) Inventor Shigemi Sato 5-6-4 Tsukiji, Chuo-ku, Tokyo Within Mitsui Shipbuilding Co., Ltd. (72) Inventor Takeji Kamime 2-4-1-1, Hamamatsucho, Minato-ku, Tokyo World Trade Center Building Kayaba Industrial Co., Ltd. Within the company (72) inventor Hiroaki Watanabe Tokyo, Minato-ku, Hamamatsu-cho 2-chome fourth No. 1 World Trade Center Building, Kayaba Industry Co., Ltd. in

Claims (8)

[Claims] 1. An anti-deflection plate is swingably disposed in front of the surface of the fixed structure on the ocean side, with its lower end hinged to the fixed structure, and the upper end of the anti-impact plate is fixed to the fixed structure. A ship impact force absorption device characterized by being operatively connected to a gas-filled oil damper extended from a structure. 2. The ship impact force absorbing device according to claim 1, wherein a net is stretched on the front surface of the anti-deflection plate. 3. The ship impact force absorbing device according to claim 1, wherein a float is arranged in front of the anti-deflection plate. 4. An oil damper comprising an outer cylinder and an inner cylinder slidably inserted into the outer cylinder and having an orifice passage at an insertion end thereof, the outer cylinder depending on the shortening movement of the inner cylinder. Oil inside flows into the inner cylinder through the orifice passage,
Also, the gas in the inner cylinder is adapted to be compressed, and the ship impact force absorbing device according to any one of claims 1 to 3. 5. The ship impact force absorbing device according to claim 4, wherein a taper pin that gradually reduces the orifice passage area in accordance with the shortening movement of the inner cylinder is provided in the outer cylinder. 6. A free piston is slidably arranged in the inner cylinder, and gas is contained in one chamber in the inner cylinder defined by the free piston. The ship impact force absorbing device described. 7. An annular chamber is formed between the outer cylinder and the inner cylinder, and the annular chamber is communicated with an oil chamber in the outer cylinder by a communication passage, and the communication passage is provided with the inner chamber when the inner cylinder is shortened. The vessel according to any one of claims 4 to 6, wherein the communication passage is largely opened, and a valve element that operates to reduce an opening area of the communication passage when the inner cylinder is extended is interposed. Impact force absorption device. 8. An oil lock chamber communicating with the annular chamber is formed between the outer cylinder and the inner cylinder, and the oil lock is provided at an opening end of the outer cylinder and an outer circumference of the inner cylinder near an extended end of the inner cylinder. The ship impact force absorbing device according to any one of claims 4 to 6, further comprising a sealing unit that cooperates with and seals the chamber.