JPS5914124B2 - Chain moving method and moving device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chain moving method and a moving device.

In this specification, movement of the chain refers to movement of the chain in the longitudinal direction, for example, loading and unwinding.

Large floating bodies such as oil storage vessels set afloat on the sea may be moored to the dolphin using chains. In this case, a moving device for loading and unloading the chain is installed on the dolphin, and the mooring of the floating body It is used for attaching the chain at the start, removing the chain during chain replacement and inspection, and adjusting the length of the chain as the chain changes over time or the floating body changes in water.

As a moving device for such a chain, it is conventional.

A hoisting machine such as a windlass is used.

FIG. 1 shows an example of this, in which a mooring chain 4 is connected between a floating body 1 and a windlass 3 on a dolphin 2.

Once the floating body 1 such as a storage vessel is moored. After that, there are few opportunities to use the mobile device.

It is uneconomical to permanently equip expensive equipment such as a windlass.

Furthermore, as the floating body 1 becomes larger, the chain 4 also becomes larger, and the outer diameter of the windlass 3 also becomes larger, making it difficult to manufacture.

Furthermore, due to the increase in the outer diameter of the windlass 3, the chain 4
Since the position of the point of application of the tensile force becomes higher, a large moment is applied to the dolphin 2 when the chain 4 is put in or taken out.

The windlass 3 is provided with a chain stopper 5 for fixing and holding the chain 4 when the floating body is moored.

In order to reduce the moment acting on the dolphin 2 when the dolphin is parked, it is necessary to lower the height of the chain stopper 5.
If it is made too low, an upward force will be applied to the dolphin 2 via the chain stopper 5 when the chain 4 is inserted, which is not preferable.

This invention was made in view of the above-mentioned circumstances, and it solves the above-mentioned problems caused by using a windlass, and can perform the same functions as a windlass, at a comparatively low cost, and It is an object of the present invention to provide a chain moving method and a moving device that can be easily implemented.

This invention will be explained below with reference to embodiments shown in FIGS. 2 to 7.

As shown in Fig. 2, a large and elongated box-shaped floating body (oil storage ship) 10 is floating on the sea, and mooring dolphins (chain attachment parts) 11 are installed on the seabed on both sides of its longitudinal ends. , a fender 12 is attached to the side surface of the dolphin 11 on the floating body 10 side.

Each dolphin 11 has a moving device 14 for mooring chain 13.
A mooring chain 13 is connected to each device 14, and the tip of each chain 13 is connected to the upper side of the longitudinal center of the floating body 10.

The reason why the floating body 10 and each dolphin 11 are connected by a fairly long chain 13 in this way is to reduce the influence of changes in water intake of the floating body 10.

Also, on the dolphin 11 is a winch used for work such as piping.

Tow trucks or crane trucks will be deployed as necessary.

On both sides of this floating body 10, many more floating bodies are arranged in parallel with the dolphin 11 in between, and are moored in a similar manner.

It is preferable to provide a breakwater or the like around these groups of floating bodies 10 to reduce the influence of waves.

As shown in FIGS. 3 and 4, the chain moving device 14 includes two fixed chain stops 15 and 16 (abbreviated as lu lower fixed stoppers) fixed to the mooring dolphin 11, and these fixed stoppers 15. , 16 (movable chain holding member)
17 (hereinafter abbreviated as a moving stopper) and a hydraulic cylinder drive device for reciprocating this moving stopper 17) 1
8.

The fixed stopper 15 on the floating body 10 side (right side in FIGS. 3 and 4) consists of a main body 19 fixed to the dolphin 11 and a locking member 20 swingably attached to the main body 19.

Both sides of the main body 19 protrude upwardly, and these protrusions 21.21
A locking member 20 is attached to the upper end of the shaft 22 by a shaft 22.

A guide part 24 with a groove 23 is provided at the bottom of the recess formed by the two protrusions 21.21, and furthermore the main body 1
A guide roller 26 having a groove 25 continuous with the guide portion 24 is attached to a portion of the floating body 9 near the floating body 10.

The locking member 20 is configured to swing up and down by a hydraulic cylinder (path shown) to open and close the fixed stopper 15.

That is, by moving the swinging end 2γ of the locking member 20 upward, the stopper 15 opens, the chain 13 becomes movable along the guide portion 24 and the guide roller 26, and the swinging end 27 of the locking member 20 opens. By moving the stopper 15 downward, the chain 13 is fixed between the guide portion 24 and the locking member 20.

The chain 13 is guided by the guide part 24 and the guide roller 26 with the lower part of the vertical part 28 fitting into the groove 23.25.

Since the upper end of the protrusion 21 of this chain stopper 15 is closed by the locking member 20, one end of the chain 13 can be passed through the switcher 15 from between the main body 19 and the locking member 20, It is not possible to hang the part on the stopper 15 from above.

Hereinafter, this type of stopper will be referred to as a closed type stopper.

The fixed stopper 15 that is far from the floating body 10 (the left side in FIGS. 3 and 4) is connected to the main body 29 fixed to the dolphin 11.
and a locking member 30 swingably attached to the main body 29.

Both sides of the main body 29 protrude upward, and a guide part 32 having a groove 31 is provided on the bottom surface of a recess between them.

A rectangular notch 34 is provided in the two protrusions 33, 33, and a bracket 35 having a bottle hole is formed on two opposing sides of each notch 34.
One end of a rectangular bar-shaped locking member 30 is swingably attached to one platen (35.35).

The locking member 30 is swung diagonally up and down by a hydraulic cylinder (path shown), and the stopper 16 is opened by moving the swinging end 3T upward, and the stopper 16 is closed by moving the locking member 30 downward. There is.

When the locking member 30 moves downward, its swinging end 3
7 fits into the notch 34 of the protrusion 33, and is fixed to the main body 29 by inserting a pin 38 into a pin hole formed in the two brackets 35 and the swinging end 37.

In the case of this chain stopper 16, when the locking member 30 is swung upward, the upper part of the protrusion 33 opens, so that the middle part of the chain 13 can be hung on the stopper from above.

Hereinafter, this type of stopper will be referred to as an open type stopper.

The movable stopper 17 is a closed stopper almost similar to the fixed stopper 15 on the floating body 10 side, and four wheels 40 are attached to the main body 39.

The stopper 17 is configured to reciprocate on a guide rail 41 fixed to the dolphin 11.

The chain 13 moves along the guide part 42, and the locking member 43 swings up and down by a hydraulic cylinder (path shown) to open and close the chain stopper 17, separating the chain 13 and the moving stopper 17, Concatenation is now taking place.

One hydraulic cylinder 18 is arranged on each side of the device 14, the cylinder body 44 is pivotally connected to a base 45 fixed to the dolphin 11, and the tip of the rod 46 is connected to the movement stopper 17.
It is pivoted on both sides.

The hydraulic cylinder 18 may be permanently attached to the device 14, or the cylinder 18 may be detachably attached to the base 45, either integrally or separately, so that it can be shared by several devices.

The loading and unloading of the chain 13 using this device 14 is as follows.

In the following description, left and right refer to the left and right in FIGS. 3 to 1.

First, both fixed stops 15,16 are closed to prevent the chain 13 from moving.

When newly attaching a chain, such as when starting mooring, the chain may be attached to each chain stopper 15, 16, 17 by an appropriate means using a crane truck or the like on the dolphin 11.

With the chain 13 fixed to the two fixed stoppers 15 and 16, the movable stopper 17 is opened and separated from the chain 13, and the rod 46 of the hydraulic cylinder 18 is advanced to move the movable stopper 17 to the right.

The moving stopper 11 is stopped at a predetermined position, and the stopper 17 is closed and connected to the chain 13 (the state shown by the solid line in FIGS. 3 and 4).

Once the chain 13 is fixed to the moving stopper 17,
Open the two fixed stoppers 15 and 16 (.

This allows the chain 13 to move freely relative to the fixed stoppers 15 and 16, but since it is connected and fixed to the movable stopper 1T, it does not move arbitrarily.

With the two fixed stops 15, 16 open, the rod 46 of the hydraulic cylinder 18 is retracted to move the movable stop 17 to the left (the state shown by the chain line in FIG. 4).

The moving stopper 17 is stopped at a predetermined position, the two fixed stoppers 15 and 16 are closed, and the chain 13 is fixed again.

As a result of the above, the chain 13 is fed to the left by the amount of movement of the moving stopper 17.

If it is necessary to further insert the chain 13, the above operation may be repeated.

In the above operation, when moving the chain 13 to the left, slack will occur in the chain 13 between the left fixed stopper 16 and the movable stopper 17, so to prevent this, pull the chain 13 to the left. There is a need.

This work may be performed by a tow truck, a crane truck, a winch, etc. on the dolphin 11, or may be performed by a device as shown in FIG. 5, for example.

In FIG. 5, there are several sheaves 47 on the dolphin 11.
are provided, and wires 48 are hung around these sheaves 47.

One end of this wire 48 is connected to the moving stopper 11,
The other end is connected to the chain 13 on the left side of the left fixed stopper 16.

The wire 48 is connected to the chain 13 in a state where the chain 13 and the wire 48 are tensioned when the movable stopper 17 is positioned to the right, and after the movable stopper 17 is positioned to the left, the chain 13 is connected to the fixed stopper 15. ．．
16, it is separated from the chain 13.

When the moving stopper 11 moves to the left in this manner, the chain 13 is connected to the wire 48 and is pulled to the left as the moving stopper 17 moves, so that no slack occurs in the chain 13.

When the chain 13 is repeatedly fed, the chain 13 and the wire 4 as described above are
8 detachment.

Just repeat the connection.

The chain 13 can be fed out in substantially the same manner.

Contrary to the above, to unwind the chain 13, open the movable stopper 17 and move it to the left with the chain 13 fixed to the fixed stoppers 15 and 16, close the movable stopper 17, and move the chain 13 to the left.
3, open the fixed stoppers 15 and 16 to make the chain 13 movable, move the movable stopper 17 to the right, and then move the chain 13 to the fixed stopper 15.
．． This is done by fixing it to 16.

Chain 13 moves to the right.

When the chain 13 has been fed in or out, the fixed stopper 15 on the floating body 10 side is closed to fix the chain 13 to the dolphin 11.

6 and 1 show an embodiment different from the above, in which the movable stopper 50 is located at the fixed stopper 51 farther from the floating body 10.
The fixed stopper 51 and the guide rail 52 on which the movable stopper 50 is mounted are composed of an open type stopper similar to the above.
．． A hydraulic cylinder 53 is mounted on an integral base 54 fixed on the dolphin 11.

This base 54 may be always provided at the position shown in the drawing, or it may be made detachable from the dolphin 11, and after the completion of a predetermined work, the fixed stopper 54 on the floating body 10 side
It is also possible to remove only the base 54 while leaving only the base 54.

In this example. The fixed stopper 51 and the movable stopper 50 that are farther from the floating body 10 are open type stoppers.

These can be removed from the middle of the chain 13 if necessary.

It is also economical because these removable parts can be shared by several mooring devices.

The rest is the same as in the previous embodiment, and the same parts π are given the same reference numerals.

The method and device according to the invention can of course be applied not only to the mooring of floating bodies as described above, but also for other purposes.

As described above, according to the present invention, the chain can be put in and out in the same way as a windlass, and the position where the chain's tensile force acts can be lowered compared to the windlass, so it is necessary for the chain attachment part. A moment larger than this does not act.

Furthermore, the device is simple and can be manufactured at relatively low cost.

Furthermore, it is economical because a part of the device can be detachably attached and shared by several devices.

[Brief explanation of the drawing]

FIG. 1 is a front view showing a conventional example, FIGS. 2 to 5 show an embodiment of the present invention, FIG. 2 is a plan view of a floating body mooring device to which this invention is applied, and FIG. 3 is a chain FIG. 4 is a sectional view taken along line IV--II in FIG. 3, FIG. 5 is a schematic front view of the moving device, and FIGS. 6 and 1 show embodiments different from those described above. FIG. 6 is a plan view, and FIG. 1 is a sectional view taken along the line ■--■ in FIG. 6. 11...Mooring dolphin (chain attachment part). 13... Mooring chain, 14... Chain moving device. 15.16, 51.55...Fixed chain stopper, 17.50...Movable chain stop collar (movable chain holding member), 18.53...Hydraulic cylinder (drive device). -1ri- 18-

Claims (1)

[Claims] 1. With two points on the chain 13 fixed at two positions on the chain attachment part 11, a movable chain holding member is connected to a predetermined position between the two points on the chain 13, and the chain attachment part Unfix the above two positions of 11 and remove the chain 13.
After making it movable. The chain 13 is moved by moving the chain holding member to a predetermined position between the two positions of the chain attachment part 11, and the two points on the chain 13 after the movement are moved to the two positions of the attachment part 11. Fix it. How to move the chain. 2. Two fixed chain stoppers 15, 16, 51.55 fixed to the chain attachment part 11 at a required interval in the moving direction of the chain 13,
These fixed chain stoppers 15, 16, 51゜5
Mobile chain stopper that can be moved between 5 and 17.50
and a drive device 18.53 for reciprocating the movable chain stopper 17.50.