JP2758568B2 - Anti-swing device for hanging hooks on a hoist ship - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for preventing a suspension hook from being shaken by the influence of waves when a heavy object is suspended by a hoist ship.

[0002]

2. Description of the Related Art Work boats having a lifting device such as a hoist ship are often not self-propelled and work in a stopped state in most cases. For this reason, in stormy weather, the hull sways under the influence of the waves, and a swaying motion is generated in the hanging tool (such as a hook). Conventional hull sway prevention measures include increasing the number of mooring lines to suppress sway of the hull, holding the hull with spuds,
There is a method of starting up on the water surface in SEP format.

[0003] Theoretically, a method using a heel ballast tank, a method using a fixed ballast, a method using a ship bottom or ship side restraint plate, and a method using an air or a jet of water to prevent the hull from swaying are considered. Etc.

[0004]

The above-described method of suppressing the sway of the hull by increasing the number of mooring lines is not very effective, so that when the hull inclination due to the waves exceeds 2 °, the slinging operation becomes difficult. Not only that, when the oscillation period of the hull is synchronized with the oscillation period of the hook, unexpected disasters may occur.

A method of holding a hull with a spud,
The method of standing on the water surface in the EP format cannot be used in a place where the water depth is deep, and any of the above-mentioned methods as a theoretically conceivable method is not practical because the structure is too complicated or the required power becomes very large. There was no problem.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a hoisting ship equipped with a hoisting device at the bow of a non-self-propelled ship, and a crossing of a bifurcated arm having a substantially V-shaped plane shape. And a connecting portion of the forked arm is connected to a hanging hook, and both legs of the bifurcated arm are connected to a jib of the hoist via a universal joint to constitute a device for preventing the suspension hook of the hoist ship from swinging. .

In addition, a saddle block whose length of protrusion of the arm can be freely changed is attached to the joint between the two legs of the fork arm of the device of the first invention and the jib of the hoist, so that the hoist ship can be shaken. The projection length of the arm may be changed accordingly to limit the plane displacement of the hook.

Further, a hull inclination angle detector is provided in the hoist ship having the above-described apparatus of the second invention, and when the hoist ship moves, the inclination angle of the hull is detected, and the amount of lateral movement given to the suspension hook is calculated by a computer. The calculation may be performed, and the calculated value may be provided as a signal to the driving device of the saddle block to control the driving device.

Further, an accelerometer is provided at the tip of the forked arm of the hoist ship having the above-mentioned device of the second invention, and the acceleration of the displacement generated by the inclination of the hull of the hanging hook at the tip is detected. The direction and the amount may be given as a signal to an arithmetic unit, and the calculated value may be given as a signal to a driving device of the saddle block to control the driving device.

[0010]

As described above, according to the present invention, the legs of the bifurcated arm are connected to both sides of the jib via the universal joint, and the tips of the two legs of the bifurcated arm are connected with pins. Since this tip is connected to the hanging hook, the hanging hook is planar, and the legs of the bifurcated arm are hypotenuses.
It is held by a triangular component whose base is the width of the jib. Therefore, according to the present invention, even if the hull sways, the swaying of the hanging hook can be effectively prevented, thereby improving the safety of the slinging operation, improving the work efficiency, and improving the economic effect. Can be enhanced.

That is, the device of the present invention is intended to effectively and economically reduce the influence of the sway of a hull on a lifting device of a hoist ship or the like, thereby ensuring working functions and improving safety. The hull of a working boat such as a hoist ship usually has a ratio of length to width of 2: 1 or more and relatively little swaying in the front-rear direction. Therefore, in the present invention, the vertical movement of the hull in the front-rear direction is unique. It does not target the hull, but rather the sway of the hull in the left-right direction. Therefore, the sway described herein means the sway of the hull in the left-right direction, and the present invention mainly prevents the sway in the left-right direction.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the figure, 1 is a water surface, 2 is an upper surface of a wave, 3 is a hull of a hoist ship, 4 is a jib pivotally supported at a front portion on a hull 3 by a shaft 5, and 6 is a base portion at an intermediate portion on the hull 3. A pulley support beam pivoted by 7; 8 an upper end of the beam 6 and an axis 9
And the base is attached to the rear part of the hull 3
Support beams connected by 0, 11 and 12 are jib 4
Pulley device for raising and lowering, 13 is its winch, 14 is 10
A hanging hook for 00 tons, 15 is a hanging hook for 15 tons, and 16, 17, 18, and 19 are winches for each hanging hook.

In this embodiment, as shown in detail in FIGS. 4 and 5, the ends 21a of both legs 21 of the bifurcated arm 20 having a substantially V-shape are bent so as to face each other. Then, the overlapped mating portion 21b is connected by the pin 22, the fixed connecting member 23a is fixed to the outer end surface of the end 21a of the one leg portion 21, and the fixed connecting member 23a is slidably slidable. A dynamic connecting member 23b is provided, and guide plates 23c are protrudingly provided at the distal ends of the connecting members 23a and 23b, respectively.
4 are connected to the connecting members 23a and 23b.
It is inserted between them so that they can be connected by connecting pins 25. 26 is a hydraulic cylinder for sliding the connecting pin, and 27 is a bracket for supporting the hydraulic cylinder.

The two legs 21, 21 of the fork arm 20 are connected to the jib 4 of the hoist via a universal joint 28. That is, as shown in detail in FIGS. 4 and 5, a bracket 29 is projected from the jib 4, and a horizontal member 31 is inserted through a horizontal shaft 30 penetrating an end of the bracket 29.
And a saddle block 33 that encloses the leg 21 at both ends of the horizontal member 31 via the vertical shaft 32.
Connect to Reference numeral 31a denotes a bracket protruding from the horizontal member 31, and the bracket 31a is fitted to the horizontal shaft 30. Reference numeral 34 denotes a bearing inserted between the saddle block 33 and the horizontal member 31, and reference numeral 35 denotes a nut screwed to the lower end of the vertical shaft 32.

Further, a saddle block 33 capable of freely changing the protruding length of the arm 20 is attached to a connecting portion between the legs 21 and 21 of the bifurcated arm 20 and the jib 4 of the hoist, according to the motion of the hoist ship. By changing the protruding length of the arm 20, the planar displacement of the hook 14 is limited. That is, as shown in detail in FIGS. 4 and 5, upper and lower guide rollers 36 that make it easy for the saddle block 33 to move with respect to the leg 21 of the arm 20.
Then, the left and right guide rollers 37 are rotatably provided on the saddle block 33. Further, a rack 38 is fixed to the upper surface of the leg portion 21 of the arm 20, and a pinion 39 meshing with the rack 38 is provided in the saddle block 33 so as to be rotatable by a thyristor-controlled geared motor 40.

FIG. 2 shows a hoist ship having the above-described apparatus.
As shown in the figure, a hull inclination angle detector 41 is provided to detect the inclination angle of the hull 3 when the hoist ship sways and calculate the amount of lateral movement given to the hanging hook 14 by a calculator (not shown), Using the calculated value as a signal, the saddle block 33 is used.
To the geared motor 40 of the driving device to control the driving device.

Further, as shown in FIG. 1, an accelerometer 4
2 and the hanging hook 14 at the tip is
The acceleration of the displacement generated by the inclination of is detected, the direction and amount thereof are given as a signal to an arithmetic unit (not shown), and the calculated value is given as a signal to the driving device of the saddle block 33, and the driving device is operated. Take control. FIG. 6 is a flowchart of the operation.

[0018]

As described above, in the present invention, the jib 4
The legs 21 of the bifurcated arm 20 are respectively connected to both sides of the bifurcated arm 20 via a universal joint 28. The distal ends 21a of the two legs 21 of the bifurcated arm 20 are connected by pins 22. Since the suspension hook 14 is connected to the suspension hook 14, the suspension hook 14 is planarly held by a triangular component member having the two leg portions 21 of the bifurcated arm 20 as oblique sides and the lateral width of the jib 4 as the bottom side. Further, a saddle block 33 capable of freely changing the protruding length of the arm 20 is attached to a connecting portion between the two legs 21 and 21 of the bifurcated arm 20 and the jib 4 of the hoist. Of the hook 14 by changing the protrusion length of the hook 14
Can be limited.

Further, a hull inclination detector 41 is provided in the hoist ship having the above-described apparatus of the present invention, and the inclination angle of the hull 3 is detected when the hoist ship moves, and the amount of lateral movement given to the hanging hook 14 is calculated by the arithmetic unit. , And the calculated value is given as a signal to the driving device of the saddle block 33 to control the driving device. An accelerometer 42 is provided at the tip of the bifurcated arm 20 of the hoist ship having the above-described apparatus according to the present invention, and the hanging hook 14 at the tip detects the acceleration of the displacement caused by the inclination of the hull 3 and the direction thereof. And the amount is given as a signal to the calculator,
The calculated value may be given as a signal to the driving device of the saddle block 33 to control the driving device.

Therefore, according to the present invention, even if the hull 3
The swinging of the hanging hook 14 can be effectively prevented even if the swaying of the swaying device is performed, whereby the safety of the slinging operation can be improved, the working efficiency can be improved, and the economic effect can be improved. .

[Brief description of the drawings]

FIG. 1 is a side view of a hoist ship having the device of the present invention.

FIG. 2 is a schematic plan view of the hoist ship of FIG. 1;

FIG. 3 is a schematic front view of the hoist ship of FIG. 1;

FIG. 4 is a side view of a bifurcated arm.

FIG. 5 is a partial plan view of the forked arm of FIG. 4;

FIG. 6 is a flowchart for explaining the operation of a bifurcated arm.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Water surface 2 Wave upper surface 3 Hull 4 Jib 5 Axis 6 Pulley support beam 7 Axis 8 Support beam 9,10 Axis 11,12 Pulley device for raising and lowering jib 13 Winch 14 Hanging hook for 1000 tons 15 For 15 tons Hanging hook 16, 17, 18, 19 winch 20 fork arm 21 leg 22 pin 23a fixed connection tool 23b sliding connection tool 23c guide plate 24 eye plate 25 connection pin 26 hydraulic cylinder 27 bracket 28 universal joint 29 bracket 30 horizontal Shaft 31 Horizontal member 32 Vertical axis 33 Saddle block 34 Bearing 35 Nut 36 Upper and lower guide rollers 37 Left and right guide rollers 38 Rack 39 Pinion 40 Geared motor 41 Hull tilt angle detector 42 Accelerometer

Continuation of the front page (56) References JP-A-56-127589 (JP, A) JP-A-63-300094 (JP, A) JP-A 62-23285 (JP, U) JP-A 58-187577 (JP , U) Shokai Sho 61-49782 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) B66C 13/06 B66C 13/32 B66C 23/52

Claims (4)

(57) [Claims] 1. A hoist ship equipped with a hoisting device at the bow of a non-self-propulsion ship, wherein a connecting portion of a bifurcated arm having a substantially V-shaped planar shape is connected with a pin, and the connecting portion is connected with a suspension hook, A suspension device for a suspension hook in a hoist ship, wherein both legs of the fork arm are connected to a jib of the hoist via a universal joint. 2. A saddle block capable of freely changing the protruding length of the arm is attached to a connecting portion between the two legs of the fork arm of the apparatus according to claim 1 and the jib of the hoist, so that the hoist ship can be shaken. A suspension device for a suspension hook in a hoist ship, wherein a planar displacement of a hook is limited by changing a protruding length of an arm in response thereto. 3. A hoist ship equipped with the apparatus according to claim 2, further comprising a hull tilt angle detector for detecting a tilt angle of the hull when the hoist ship shakes and calculating a lateral movement amount given to a hanging hook by a computer. A device for controlling the suspension of a hanging hook in a hoist ship, wherein the calculated value is calculated and given as a signal to a drive device of the saddle block to control the drive device. 4. An accelerometer is provided at a tip portion of a forked arm of a hoist ship having the device according to claim 2, and a suspension hook at the tip portion detects an acceleration of a displacement generated due to a tilt of the hull, and detects the acceleration. A device for controlling the driving of the saddle block by providing the direction and the amount as a signal to a computer, and the calculated value as a signal to a driving device of the saddle block; .