HK1169467B - Mooring device for flap gate type breakwater - Google Patents

Description

Mooring device of fluctuation door type breakwater

Technical Field

The present invention relates to a device for mooring a gate of a rolling gate type breakwater installed in an estuary, for example, in response to tsunami.

Background

A conventional rolling gate type breakwater realizes rolling of a door body by buoyancy (for example, patent document 1).

In the above-described rolling gate type breakwater, the door body floats by supplying air to the buoyancy chamber provided in the door body and discharging seawater in the buoyancy chamber, and therefore, an air supply device for supplying air to the buoyancy chamber and discharging water from the buoyancy chamber is required.

However, in the above-described rolling gate type breakwater, it is necessary to always store compressed air in the pressure storage tank so that necessary compressed air can be supplied even in the event of a power failure. Further, since the buoyancy chamber of the door body in the storage state is filled with seawater and stored at the storage position by the weight of the door body, it is necessary to constantly monitor the pressure of the accumulator tank, the tilting moment of the door body (the weight of the front end portion of the door body), and the inclination angle. However, in this case, an abnormal situation in which a hole is opened in the buoyancy chamber due to corrosion or the like cannot be detected. Further, when the weight of the door body is increased by deposits or the like, maintenance such as floating operation or dredging is required, which increases the burden of maintenance management.

Further, for example, when an earthquake occurs, if a tsunami warning is issued and the breakwater is erected, the air supply valve is opened in response to a float command to supply air to the buoyancy chamber and discharge water from the buoyancy chamber, and therefore, there is a problem that it takes a long time to erect the breakwater and it is not long enough to prevent the invasion of the tsunami.

Therefore, the applicant has proposed the following solutions: in a corrugated gate breakwater in which a door is erected by buoyancy, the door is retained and tied in a state in which the door is always buoyant (japanese patent application No. 2008-307699).

In this mooring device for a rolling gate type breakwater, a mooring hook provided in water is operated from the ground by a mooring rope. Therefore, when the mooring rope is stretched due to aging or seasonal change, the posture of the mooring hook needs to be corrected to maintain a reliable mooring state, but the correction takes a long time.

Further, when the mooring rope is extended and needs to be replaced, it is necessary to perform an underwater operation of attaching the rope tip to the mooring hook.

Patent document 1: japanese patent laid-open publication No. 2003-227125.

The problems to be solved by the invention are as follows: in the mooring device of the rolling gate type breakwater proposed by the applicant, in order to maintain a reliable mooring state, it takes a long time to correct the posture of the mooring hook with respect to a change (elongation) of the mooring rope that operates the mooring hook. Further, since the mooring hook side of the mooring rope for operating the mooring hook is located in the water, the underwater work is required for replacement.

Disclosure of Invention

In order to prevent the posture of the mooring hook from being corrected for a long time and to prevent the rope from being positioned in the water, the mooring device of the rolling gate type breakwater according to the present invention is a mooring device which moors a plurality of door bodies arranged in parallel in a width direction in a state in which the door bodies obtain buoyancy and performs a floating operation by releasing the mooring, and is characterized by including: a torsion shaft provided at a position opposite to a door mooring portion attached to a back surface of the door body in a mooring state so as to be rotatable about a shaft center; a mooring hook attached to the torsion shaft in a projecting manner at a position where the mooring hook can be engaged with the door mooring portion; a balancer attached to the torsion shaft so as to rotate the torsion shaft in a direction to release the engagement of the mooring hook with the door mooring portion; a first steering link member provided in a portion of the storage section that moors the door body in water, the portion being opposed to a rear surface of the door body in a moored state; a second steering link member provided in the storage section on an outer side of a rear surface side of the door body in a captive state; a rod member, one end side of which is connected to a position near the other end side of a torsion arm having one end side mounted to the torsion shaft, the other end side of which is pulled up to the water surface by the two steering link members; a hook engaging cylinder device provided in the vicinity of the other end of the rod member and having a pulley attached to the front end of the piston rod; and a wire member, one end side of which is connected to the other end of the lever member, and the other end side of which is connected to a telescopic device that is telescopic along with the swing of the door body via the pulley; one end side of one lead straight rod constituting the rod member is pivotally supported at a position close to the other end side of the torque arm, the other end side of the one lead straight rod is pivotally supported at one end side of the one steering link member, the one vertical rod has a long hole at one end side and a spherical bush at the other end side, and when the door body is mooring operated, the one lead straight rod swings with the spherical bush as a fulcrum while the mooring hook tip is pushed down from the door mooring portion until the mooring hook tip avoids the door mooring portion, and a pin attached to the torque arm at a position close to the other end side moves along the long hole to allow the mooring hook to swing up and down.

In the present invention, the wire member is connected to the other end side of the rod member used in place of the mooring rope and to the expansion and contraction device that expands and contracts as the door body swings, and the wire member is moved up and down by the pulley attached to the front end of the piston rod of the hook engaging and disengaging cylinder device, whereby the extension of the rod member can be corrected.

In the present invention, the wire member is connected to the rod member and the expansion and contraction device that expands and contracts as the door body swings, and the wire member is moved up and down by the pulley attached to the piston rod of the hook engaging cylinder device, whereby even if the rod member is extended, the extension can be corrected.

Further, by providing a long hole at one end side of one lead straight rod connecting the torque arm and one steering link member and providing a spherical bush at the other end side thereof, the mooring operation can be performed only by the mooring hook and the balancer. Therefore, the device provided on the ground does not need to be moved in association with a series of mooring actions, and the stroke of the hook engaging cylinder device can be reduced. Further, since the series of mooring operations are performed independently of the steering link member and the lever member, it is not necessary to move the steering link member and the lever member by the balancer, and the weight of the balancer can be reduced.

Drawings

Fig. 1 (a) is a schematic view illustrating a collapsed state of the rolling gate type breakwater having the mooring device of the present invention at the time of mooring, and fig. 1 (b) is an enlarged view of a front end portion of the door body.

Fig. 2 is a schematic view showing a state where a rolling gate type breakwater is continuously provided along the width of a harbor, and (a) is a perspective view without a tension bar and (b) is a side view.

Fig. 3 is a view illustrating the gap between the front end of the door body and the receiving portion and the opening width of the door body block at both side end portions thereof, where (a) is a side view and (b) is an elevation view.

Fig. 4 is a detailed view of the mooring device, where (a) is a perspective view showing the structure of the storage unit side, and (b) is a detailed view showing the structure of the control unit side.

Fig. 5 is a schematic view illustrating a state of the mooring device when a plurality of one steering link members are provided.

Fig. 6 (a) is a view illustrating a state of the mooring device in the mooring preparation operation, and (b) is a view along a-a of (a).

Fig. 7 (a) is a view illustrating a state of the mooring device when the mooring preparation operation is completed, and (b) is a view along a-a of (a).

Fig. 8 is a diagram illustrating a predetermined stroke amount in the mooring preparation operation.

Fig. 9 (a) to (c) are views sequentially explaining the relative positional relationship between the door mooring pin and the mooring hook as the door body falls down.

Fig. 10 (a) is a view illustrating a state of the mooring device when mooring is completed, and (b) is a view illustrating a relative positional relationship between the door mooring pin and the mooring hook as viewed from the a-a direction of (a).

Fig. 11 (a) is a schematic view illustrating a state of the mooring device when the mooring of the door body is released, and (b) is a view along a-a of (a).

Fig. 12 is a diagram illustrating a mooring force required when the door body is allowed to swing.

Fig. 13 is a diagram illustrating a mooring force required to maintain the collapsed state of the door body.

Description of the reference numerals

B door body block

1 fluctuation gate type breakwater

2 door body

2a rotating shaft

2b buoyancy chamber

2c back side

2d door fastening part

4 storage part

5 bearing

11 mooring mechanism

12-side steering link member

13 the other steering link member

14 torsion shaft

15 mooring hook

16 balance member

17 Bar element

17a vertical rod

17aa long hole

17ab spherical bushing

17b horizontal bar

17c the other vertical rod

18 torsion arm

19 action limiting stop

22 hook separating cylinder device

22b piston rod

23 Pulley

24-wire component

26 spring device

Detailed Description

In the present invention, the tie-rod member and the wire member of the expansion device that expands and contracts as the door body swings are moved up and down by the pulley attached to the piston rod of the hook engaging cylinder device, thereby achieving the object of correcting the posture of the mooring hook in a short time.

(examples)

The following describes an embodiment of the present invention in detail with reference to fig. 1 to 13.

Fig. 1 is a schematic view illustrating a state in which a rolling gate type breakwater having a mooring device according to the present invention is collapsed during mooring.

In fig. 1, reference numeral 1 denotes a rolling gate type breakwater, and includes, for example, a door body 2 and a plurality of tension rods 3, and the plurality of tension rods 3 are provided outside the harbor of the harbor R so that the door body 2 does not fall down when the door body 2 floats up.

The structure of the door body 2 is as follows: in the case of installation in a water area having a wide harbor width, as shown in fig. 2 (a), a plurality of door blocks B are arranged side by side at a predetermined interval in the width direction, and the adjacent door blocks B are connected to each other by a rope.

In the door body 2, the door block unit is defined as one door block unit from the center on one side to the center on the other side between the adjacent door blocks B, and the opening width d1 at both side ends of the door block B is defined as a value obtained by subtracting the width of the door block B from the width of the one door block unit (see fig. 3 (B)).

For example, in the rolling gate type breakwater 1 for tsunami, the opening width d1 of both side end portions of the door block B is substantially 1% of the width of the door block B so that the amount of water leakage into the harbor is not excessive when tsunami occurs. Since one door block unit is arranged at a predetermined interval in the width direction, the opening width between adjacent door blocks B is (d1/2) × 2 ═ d1, and thus is 1% with respect to the width of the door block B. Further, if the opening width d1 at both side ends of the door block B is too small, a problem arises in that foreign matter is caught.

The door body 2 is configured such that the rotating shaft 2a on the base end side is rotatably supported by a bearing 5 on a base 4a of a housing portion 4 provided in an integrated structure at the bottom of the bay R, for example, whereby the door body 2 can be raised and lowered about the rotating shaft 2a as a fulcrum.

In order to smoothly perform the rolling operation, a space d2 is also provided between the front end of the door body 2 and the housing portion 4 (see fig. 3 (b)). Therefore, as shown in fig. 3 (a), the upper space S1 and the lower space S2 of the door body 2 in the collapsed state communicate with each other through the opening width d1 of the end portions on both sides of each door block B and the space d2 between the tip end of each door block B and the housing portion 4.

The tension rod 3 is formed, for example, by folding a connecting portion 3a in the middle thereof in two. One end portion 3b located on the upper end side when the door body 2 is erected is rotatably supported on the top side of the door body 2, and the other end portion 3c located on the lower end side when the door body 2 is erected is rotatably supported at a position spaced apart from the rotating shaft 2a by a predetermined distance on the falling side of the door body 2.

A buoyancy chamber 2b is provided on, for example, the top side of the door body 2, and the buoyancy necessary for floating the door body 2 is obtained by supplying air to the buoyancy chamber 2b by an air supply device (receiving tank and compressor) not shown.

Reference numeral 11 denotes a mooring device according to the present invention, which moors the door 2 in a state of buoyancy in water, and is configured, for example, as shown in fig. 4.

12. Reference numeral 13 denotes a crank-shaped steering link member, and one steering link member 12 is provided at a portion of the storage section 4 for anchoring the door body 2 in water, which portion faces the rear surface 2c of the door body 2 in a collapsed state at the time of anchoring shown in fig. 1 (a). The other steering link member 13 is provided on the outside of one end of the door body 2 in the storage portion 4 at a portion facing the back surface 2c of the door body 2 in the collapsed state during storage.

Reference numeral 14 denotes a torsion shaft which is rotatable about the axial center, and which is provided at a position facing the door staying portion 2d attached to, for example, the top end portion side (the upper end side of the door body 2 when standing) of the rear surface 2c of the door body 2 in a staying state. The mooring hook 15 is attached to the torsion shaft 14 in a projecting manner at a position where the mooring hook 15 can be engaged with the door mooring portion 2 d.

Reference numeral 16 denotes a balancer, and for example, the mooring hook 15 projects to the opposite side of the torsion shaft 14, and the balancer 16 is attached to the projecting portion on the opposite side, and the torsion shaft 14 is rotated in a direction to release the engagement of the mooring hook 15 with the door mooring portion 2 d.

Reference numeral 17 denotes a rod member, one end side of which is connected to the other end side of a torsion arm 18 having one end side attached to an axially intermediate position of the torsion shaft 14, and the other end side of which is pulled out to the water surface through the one steering link member 12 and the other steering link member 13.

The rod member 17 is composed of one vertical rod 17a, a horizontal rod 17b, and the other vertical rod 17 c.

One of the vertical rods 17a has a long hole 17aa at one end, and a pin 18a provided at a position closer to the other end of the torque arm 18 is inserted into the long hole 17 aa. On the other hand, the other end of the one vertical rod 17a is provided with a spherical bush 17ab, and the spherical bush 17ab is rotatably supported by the one end 12a of the one steering link member 12.

One end of the horizontal rod 17b is rotatably supported by the other end 12b of the one steering link member 12, and the other end of the horizontal rod 17b is rotatably supported by the one end 13a of the other steering link member 13. When a plurality of one steering link members 12 are provided, the horizontal rod 17b is rotatably supported by the other end portion 12b of the one steering link members 12, and the other end portion thereof is rotatably supported by the one end portion 13a of the other steering link member 13 (see fig. 5).

One end of the other vertical rod 17c is rotatably supported by the other end 13b of the other steering link member 13, and the other end of the other vertical rod 17c is pulled out to the water surface and connected to a control device 21 having the following configuration.

Reference numeral 19 denotes an operation limiting stopper which is provided on the turning locus of the one end portion 12a of the one steering link member 12, and the one end portion 12a of the one steering link member 12 is in contact with the operation limiting stopper 19 to limit the operation range of the one steering link member 12 (see fig. 8).

Reference numeral 22 denotes a hook engaging and disengaging cylinder device which is provided in the vicinity of the other end of the other vertical rod 17c for engaging and disengaging the mooring hook 15 with respect to the door mooring portion 2 d. The hook engaging cylinder device 22 is provided with a pulley 23 attached to the tip of a piston rod 22b that extends from a cylinder 22a fixed to the bottom.

Reference numeral 24 denotes a wire member which is wound around the pulley 23, one end side of which is connected to the other end of the other vertical rod 17c via a load sensor 25, and the other end side of which is connected to a stretching device, for example, a spring device 26, which stretches and contracts with the swing of the door body 2. The spring used in the spring device 26 is a coil spring in which an elongated metal wire is wound in a spiral shape. In the case of using the wire member 24, the replacement by the extension can be accomplished only by the above-ground work without the underwater work.

The hook engaging cylinder device 22 is provided with a stroke sensor 22c for detecting the amount of advance and retreat of the piston rod 22 b. The spring device 26 is provided with a stroke sensor 26a for measuring the spring stroke and a stroke indicator.

In the mooring device 11 having the above-described configuration, the expansion and contraction of the spring device 26 allows the waves to be swung by the buoyancy generated by the door 2 when the waves pass above the door 2 of the housing 4, so as to cancel the wave force.

The rolling gate type breakwater 1 having the above-described structure is configured to anchor and release the anchoring of the door body 2 by the following operation.

(mooring preparatory operation: see FIGS. 6 to 8)

The piston rod 22b of the hook engaging cylinder device 22 is extended, and the one end portion 12a of the one steering link member 12 is brought into contact with the operation limiting stopper 19 (see fig. 6).

Then, while monitoring the stroke sensor 26a or the load sensor 25 of the spring device 26, the piston rod 22b of the hook engaging cylinder device 22 is extended until the same mooring force as that in the buoyancy serving as a reference when the door body 2 is moored is applied. Then, the stroke position of the piston rod 22b of the hook engagement cylinder device 22 at this time is detected by the stroke sensor 22c and stored as a reference position. Hereinafter, the mooring force equivalent to the buoyancy that is the reference when the door 2 is moored will be referred to as the predetermined mooring force.

At this time, a set of link members and spring devices extending from the operation limiting stopper 19 to the control device 21 are extended with a predetermined mooring force. The set of link member and spring device is one steering link member 12, the lever members 17b and 17c, the other steering link member 13, the load sensor 25, the wire member 24, and the spring device 26.

The relative relationship between the postures of the steering link member 12 and the mooring hook 15 is determined. Therefore, in the posture of the steering link member 12 at one of the stored reference positions, the piston rod 22b of the hook engaging cylinder device 22 is retreated by a predetermined stroke equivalent (see fig. 8). The predetermined stroke equivalent amount is a relative position (solid line) from a position (broken line) where one of the steering link members 12 contacts the operation limiting stopper 19 to a time when the mooring hook 15 is in a horizontal state.

In the above state, when the piston rod 22b of the hook engaging cylinder device 22 is retreated by a predetermined stroke equivalent, first, the one set of the link member and the spring device which are extended contract. Then, the one end portion 12a of the one steering link member 12 is separated from the operation limiting stopper 19. The mooring hook 15 is at a position inclined downward from the horizontal state corresponding to the contraction of the set of link members and the spring device (see fig. 7). At this point, the mooring preparation operation is completed.

(mooring operation: refer to FIGS. 9 to 10)

In a state where the mooring preparation operation is completed, the exhaust valve provided at the upper end portion of the door 2 is opened to exhaust the air in the buoyancy chamber 2b, and at the same time, the seawater is made to enter the buoyancy chamber 2b to collapse the door 2.

As the door body 2 falls, the pin 18a of the torque arm 18 moves to the lower portion of the elongated hole 17aa of the one vertical rod 17a while the door mooring portion 2d provided in the door body 2 presses the mooring hook 15 downward (see fig. 9 (a) to 9 (b)). During this time, since the one vertical rod 17a swings with the spherical bushing 17ab as a fulcrum, the pin 18a of the torque arm 18 can be smoothly moved along the long hole 17 aa.

If the door anchoring portion 2d of the door body 2 passes the anchoring hook 15, the anchoring hook 15 is returned to a position slightly inclined downward from the horizontal state by the weight of the balancer 16, while avoiding the door anchoring portion 2d (fig. 9 (c)).

After the completion of the lodging, compressed air is supplied into the buoyancy chamber 2b, and the seawater in the buoyancy chamber 2b is discharged. Thereby, the door body 2 floats, and the door mooring portion 2d pushes up the mooring hook 15 to transmit the buoyancy of the door body 2. At the same time, the lever member 17, one steering link member 12, the other steering link member 13, the wire member 24, and the spring device 26 extend and displace while applying a mooring force generated by the buoyancy of the door body 2. The mooring hook 15 moves upward by this displacement amount (fig. 10).

Thereafter, the stroke sensor 26a or the load sensor 25 of the spring device 26 is monitored, and it is confirmed that a predetermined mooring force is applied to stop the supply of air to the buoyancy chamber 2 b. At this time, the mooring hook 15 reaches a horizontal state.

Since the control device 21 provided on the ground does not move in association with the above series of mooring operations, the stroke of the hook engagement cylinder device 22 can be reduced. In addition, since it is not necessary to move the steering link members 12, 13 and the lever member 17 through the counterweight 16, the weight of the counterweight 16 can be reduced.

In addition, when the lever member 17, the one steering link member 12, and the other steering link member 13 are changed in extension, deflection, or the like, if the series of mooring preparatory operations are performed each time before the mooring operation, the attitude of the mooring hook 15 can be always maintained and a normal mooring state can be always maintained even if the attitude of the mooring hook 15 in water is not visually confirmed. (operation for lifting door 2: refer to FIG. 11)

The hydraulic pressure of the hook engaging cylinder device 22 is released to moderate the holding force. Thus, the other vertical rod 17c, the other steering link member 13, the horizontal rod 17b, the one steering link member 12, the one vertical rod 17a, and the torque arm 18 reduce the mooring force of the mooring hook 15. Therefore, the mooring hook 15 is pushed up by the buoyancy of the door body 2 and the force of the balancer 16, and the engagement between the mooring hook 15 and the door mooring portion 2d is released.

After that, the contraction of the spring device 26 is confirmed, and at the same time, the absence of the mooring force is confirmed by the load cell 25.

In the heave gate-type breakwater 1 having the above-described structure, the door body 2 is anchored so as to be allowed to swing by the spring device 26. In this case, the door 2 is displaced upward, so that the space S2 below the door 2 becomes a negative pressure, and a downward force is generated on the door 2 by a pressure difference with the upper surface of the door 2 (see fig. 12).

Therefore, the load required to moor the door 2 is reduced as compared with the case where the mooring mechanism must entirely receive the load acting as a moment of the door 2 around the rotating shaft 2a due to the waves to fix and moor the door 2 (see fig. 13).

The present invention is not limited to the above examples, and it goes without saying that the embodiments may be appropriately changed within the scope of the technical idea described in each claim.

Claims (2)

1. A mooring device of a rolling gate type breakwater which moors a door body in which a plurality of door body blocks are arranged side by side in a width direction in a state in which the door body obtains buoyancy, and performs a floating operation by releasing the mooring, the mooring device of the rolling gate type breakwater characterized by comprising:

a torsion shaft provided at a position opposite to a door mooring portion attached to a back surface of the door body in a mooring state so as to be rotatable about a shaft center;

a mooring hook attached to the torsion shaft in a projecting manner at a position where the mooring hook can be engaged with the door mooring portion;

a balancer attached to the torsion shaft so as to rotate the torsion shaft in a direction to release the engagement of the mooring hook with the door mooring portion;

a first steering link member provided in a portion of the storage section that moors the door body in water, the portion being opposed to a rear surface of the door body in a moored state;

a second steering link member provided in the storage section on an outer side of a rear surface side of the door body in a captive state;

a rod member, one end side of which is connected to a position near the other end side of a torsion arm having one end side mounted to the torsion shaft, the other end side of which is pulled up to the water surface by the two steering link members;

a hook engaging cylinder device provided in the vicinity of the other end of the rod member and having a pulley attached to the front end of the piston rod; and

a wire member, one end side of which is connected to the other end of the lever member, and the other end side of which is connected to a telescopic device that is telescopic along with the swing of the door body via the pulley;

one end side of one lead straight rod constituting the rod member is pivotally supported at a position close to the other end side of the torque arm, the other end side of the one lead straight rod is pivotally supported at one end side of the one steering link member, the one vertical rod has a long hole at one end side and a spherical bush at the other end side, and when the door body is mooring operated, the one lead straight rod swings with the spherical bush as a fulcrum while the mooring hook tip is pushed down from the door mooring portion until the mooring hook tip avoids the door mooring portion, and a pin attached to the torque arm at a position close to the other end side moves along the long hole to allow the mooring hook to swing up and down.

2. The mooring device of a heave gate-type breakwater according to claim 1, wherein an operation limiting stopper for limiting the rotation of the one steering link member is provided on a rotation trajectory of the one end side of the one steering link member.