JP2000351572A - Rocking preventing device of hanging hook in floating crane - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent the rocking with a simple structure in a floating crane having two or more hanging hooks suspended from the jig tip of a crane device provided on a hull by arranging a plurality of wire ropes so as to be crossed in substantially X-shape between the jib tip and a connecting bar. SOLUTION: A floating crane 1 has two crane jibs 3, 3' rockable about a shaft 4 on a hull 2. Hanging hooks 7, 7' are suspended from the tips of the jibs 3, 3' by hoisting wire ropes 6, 6', respectively. A rocking preventing device is provided in order to prevent the rocking of each hanging hook 7, 7', and this device comprises a vertical connecting bar 13 for connecting two longitudinally arranged two hanging hooks 7, a horizontal connecting bar 14 for connecting two laterally adjacent hanging hooks 7, and control ropes 15, 15' suspended from the respective jibs 3, 3' and connected to the vertical connecting bar 13. The control wire ropes 15, 15' are arranged in substantially X-shape in a front view.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hoist ship or the like,
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a suspension device for a lifting hook, which prevents a lifting hook of a hoist from being shaken by the influence of wind or waves when lifting a heavy object in a work boat having a hoist.

[0002]

2. Description of the Related Art In a work boat such as a hoist ship, lifting work of heavy objects is performed while the hull is moored on water, that is, in a stopped state. As a result, the hull sways under the influence of the wind and the waves, and accordingly, the suspension hook of the hoist for lifting heavy objects also rolls. As a countermeasure to prevent the suspension hook from swinging, for example, a suspension frame disposed between the suspension hook and the heavy object (for example, a movable mass is provided by referring to the suspension frame described in JP-A-6-277861 and There are a method of moving the mass in accordance with the cycle of sway, a method of holding the hull with a spud, and a method of raising the hull on the water surface by the SEP method so as not to be affected by waves.

[0003] However, in the conventional methods as described above, the size of the device for preventing the sway is increased,
Accompanying this, there is a problem that the weight of the equipment is increased, especially in a large hoist ship, so that the weight of the object to be lifted is limited, and the mounting position of the device for preventing the sway is restricted.

[0004]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and proposes an apparatus for preventing a suspension hook from swinging, which can be realized with a small, weighing and simple configuration.

[0005]

Means for Solving the Problems and Actions and Effects Thereof To solve the above problems, a suspension device for a suspension hook according to the present invention is provided with a hoist device on a hull, and the hoist device is provided with a jib. In a work boat provided with two or more hanging hooks suspended from a tip, a connecting bar provided between the adjacent hanging hooks and interconnecting these hanging hooks, and each of the hanging hooks from the jib tip. A plurality of wire ropes extending toward and a winding means of the wire rope, wherein the wire rope intersects in a substantially X shape between the jib tip and the connection bar, The connection bar is supported from the jib tip.

That is, in the device for preventing the suspension hook from swinging according to the present invention, the suspension hooks suspended from the tip of the hoist jib are connected to each other by the connection bar, and a plurality of wire ropes supporting the connection bar are connected to the tip of the jib. It crosses in a substantially X-shape with the bar. Usually, especially on a large hoist ship, it has two or four sets of hanging hooks, which are arranged so as to form a substantially parallelogram on the horizontal plane.
Connected. In this case, these hooks oscillate in a state of this substantially parallelogram. In the anti-sway device according to the present invention, these hanging hooks are fixed with oblique force by wire ropes crossing in a substantially X-shape to suppress the swinging of the hanging hooks.

Therefore, the anti-sway device according to the present invention can be realized with a simple configuration, and can prevent the hanging hook from oscillating while preventing the equipment weight of the ship from increasing. Therefore, it is possible to keep the safety of the lifting work of the heavy object. Further, the present invention can be applied to a wide range of work boats, from a small work boat having only one hoist to a large work boat having a plurality of hoists. In particular, the present invention is effective for a large (for example, 3000 ton or more lifting capacity) work boat.

[0008] The suspension device for a suspension hook according to the present invention comprises: tension detection means for detecting the tension of each of the wire ropes; acceleration detection means for detecting the acceleration of the hull tilting in the left-right direction; And a length adjusting means for adjusting the length of each of the wire ropes, wherein an acceleration when the hull is tilted is detected by the acceleration detecting means. Detect
From the value, the moving amount of the hanging hook is obtained by the moving amount detecting means, and from the obtained moving amount, the tension of each of the wire ropes is detected by the tension detecting means. The length of the wire rope is adjusted.

That is, the suspension device for a suspension hook according to the present invention comprises a means for detecting the inclination of a hull and a length of the wire rope in a wire line between a wire rope winding means (a winch) and a connecting bar. Means for adjusting the
Means for detecting the tension of the wire rope, and by adjusting the length and tension of the wire rope in accordance with the inclination of the hull, the posture of the hanging hooks, that is, each hanging hook has the horizontal substantially parallelogram shape described above. These are supported so as to maintain the positional relationship. Therefore, even if the hull sways, the swaying of the suspension hook can be effectively prevented, and the safety of the lifting operation of the heavy object can be improved.

Further, the present invention relates to a work boat provided with the above-mentioned anti-sway device.

A work boat according to the present invention is provided with the above-described swing-preventing device on a lifting hook of a hoist for lifting a heavy object. Therefore, the swinging of the hanging hook due to the swinging of the hull and the like can be effectively suppressed, and the safety of the lifting work of the heavy object can be maintained.

[0012]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 3 show an example of a hoist ship equipped with a device for preventing a hanging hook from swinging according to the present invention. FIG. 1 is a side view, FIG. 2 is a plan view, and FIG. This shows a state in which the heavy object H is being lifted while standing still on the sea surface S. The hoist ship is a large hoist ship with a lifting capacity of 3000 tons or more.

The illustrated hoist ship 1 is provided with two hoist gibs 3 and 3 'on a hull 2, each of which can be raised and lowered by a jib hoisting wire rope 5 with two shafts 4 as fulcrums. ing. From the tip of jib 3, 3 '
A plurality of suspension hooks 7 are suspended by the suspension hook hoisting wire ropes 6, 6 '. In addition, Vessel 1
In this example, two hanging hooks 7 are arranged side by side from one jib 3 (and 3 ′) and are hung.
In the figure, a large number of hanging wires 8 are provided by the hanging hooks 7.
The heavy object H is suspended via the. In FIGS. 2 and 3, each member and element on the jib 3 ′ side is indicated with “′ (dash)”.

The jib hoisting wire rope 5 is supported by wire rope support beams 9, 9 'on the hull 2 and auxiliary beams 10, 10' for supporting the support beams 9, 9 ', respectively, and a winch 11 ( Winding and unwinding are performed according to FIG. 3). On the other hand, the lifting hook hoisting wire ropes 6 and 6 'are also provided with winches 12, 12'.
(See FIGS. 1 and 3), winding and feeding are performed.

As described above, the hoist ship 1 is provided with a swing-preventing device for preventing the swinging of the hanging hooks 7 (and 7 '). Hereinafter, this device will be described.

The present anti-sway device comprises a vertical connecting bar 13 for connecting two hanging hooks 7 arranged in the front and rear directions in the bow direction.
A horizontal connecting bar 14 for connecting two hanging hooks 7 adjacent to each other (that is, the hanging hook 7 on the jib 3 side and the hanging hook 7 'on the jib 3' side in FIG. Control wire ropes 15 and 15 'suspended from 3' and connected to the vertical connecting bar 13; guide pulleys 16 and 16 'provided on the jib 3 and 3' for guiding the control wire rope; Acceleration sensors 17, 17 'for detecting inclination
A winch 18 for winding and unwinding the control wire ropes 15 and 15 ', and a tension control unit 19 for controlling the tension of the control wire ropes 15 and 15'. Although not explicitly shown in the drawing, since two hanging hooks are provided on each of the jib 3 and 3 'in the Vessel 1, two vertical connecting bars 13 and two horizontal connecting bars 14 are also provided. ing.

As shown in FIG. 3, the control wire rope 15,
15 'is substantially X-shaped when viewed from the front. That is, the control wire rope 15 lowered from the jib 3 side is connected to the horizontal connecting bar 13 (not shown) on the hanging hook 7 'side suspended from the jib 3', while the control wire rope 15 is lowered from the jib 3 'side. The control wire rope 15 ′ is connected to a horizontal connecting bar (see FIG. 1) on the side of the hanging hook 7 suspended from the jib 3.

Each hanging hook 7, 7 'is connected to a connecting bar 13, 14.
By being connected to each other, it is possible to always maintain a positional relationship that forms a substantially parallelogram. In addition, control wire ropes 15, 15 'in which these connecting bars intersect in a substantially X shape.
By being supported by and fixed by an oblique force, the sway is suppressed.

FIG. 4 shows a tension control unit 19 of the suspension hook anti-swing device. The tension control unit 19 includes two hydraulic cylinders 20 and 20 ′ arranged back to back with each other, first guide pulleys 22 and 22 ′ attached to respective ends of cylinder rods 21 and 21 ′ of each hydraulic cylinder, a control wire. Rope 1
Wire tension detecting sensors 25, 25 'attached to the rotating shafts of the second guide pulleys 23, 23, the third guide pulleys 24, 24', and the third guide pulleys 24, 24 'for respectively guiding 5, 15'. Equipped. The hydraulic cylinders 20, 20 'are both operated by a hydraulic device (not shown). In the example shown in the figure, two hydraulic cylinders are connected and arranged at one place. However, depending on the installation location on the ship and the positional relationship with the jib, etc., each is separated by a predetermined distance and individually. It may be arranged.

The adjustment of each control wire rope 15, 15 'by the tension control unit 19 is performed as follows. First, the hull 1 has some cause, for example, a wave W (see FIG. 3).
When the vehicle is tilted, the acceleration at the time of the tilt is detected by acceleration sensors 17, 17 'provided at the tips of the jib 3, 3'. On the basis of the detected acceleration, the amount of movement (sway) of the suspension hook 7 associated with the inclination of the hull is obtained by using a calculation means (not shown).

According to the obtained movement amount, the hydraulic cylinder
One or both of 20 and 20 'are activated and the cylinder rod 2
Varying the stroke of 1, 21 'adjusts the length of one or both of the control wire ropes 15, 15'. At this time, the tension of each wire is also detected by the wire tension detection sensors 25 and 25 ', and based on the result, the tension of the wire is also adjusted to a predetermined value. By adjusting the lengths and tensions of the control wire ropes 15 and 15 ', the horizontal position of the suspension hook 7 is maintained.

FIGS. 5 to 7 show another example of a hoist ship equipped with a suspension device for a suspension hook according to the present invention. FIG. 1 is a side view, FIG. FIG. 3 is a front view. The hoisting ship has a lifting capacity of 1000
It is a small hoist ship of less than ton.

The illustrated hoist ship 31 is provided with a single hoist jib 33 on a hull 32, and the jib 33 can be raised and lowered by a jib hoisting wire rope 35 with two shafts 34 as fulcrums. From the tip of the jib 33, four hanging hooks 37a to
37d is suspended. Of the four hanging hooks, FIG. 5 shows two 37a and 37c, and FIG. 7 shows two 37a and 37b. Although the hanging hook 37d is not shown, in FIG.
However, in FIG. 7, it is assumed that they are located immediately behind the hanging hooks 37b, respectively.

The jib hoisting wire rope 35 is supported by a wire rope support beam 38 on the hull 32 and an auxiliary beam 39 supporting the support beam 38, and a winch 40
(See FIGS. 5 and 6), winding and feeding are performed. On the other hand, the hanging hook hoisting wire rope 36 is also hoisted and fed by the winch 41 (see FIGS. 5 and 6).

The suspension device for the suspension hook 36 provided on the hoist ship 31 includes two suspension hooks (37a and 37c shown in FIG. 5 and 37b and 37d not shown) arranged in front and rear.
A vertical connecting bar 42 connecting two hanging hooks (37a and 37b shown in FIG. 7 and 37c and 37 not shown in FIG. 7)
d) control wire ropes 44a, 44 suspended from the horizontal connecting bar 43 and the jib 33 and connected to the vertical connecting bar 42.
b, winches 45a and 45b for winding and unwinding each control wire rope, and tension control units 46a and 47b for controlling the tension of each control wire rope. In addition,
The ship 31 is also provided with an acceleration sensor for detecting the inclination of the hull, as in the example described above, but is omitted in the drawings.

In the hoist ship 31, a projecting beam 47 projecting left and right is provided at the end of the jib 32, and the control wire ropes 44a and 44b are respectively provided with projecting beams.
It is lowered from both ends of 47 toward the hanging hook 37.
As shown in FIG. 7, the control wire rope 44a lowered from one end 47a of the overhang beam 47 is connected to the suspension hooks 37b and 37b.
d, and a control wire rope 44b lowered from the other end 47b of the overhang beam 47 connects a vertical connecting bar 42 (not shown) connecting the hanging hooks 37a and 37c. It is connected to a connecting bar 42 (see FIG. 5).
As a result, the control wire ropes 44a and 44b intersect in a substantially X-shape as shown. Here, pulleys (not shown) for guiding the control wire rope are provided at both ends 47a and 47b of the overhanging beam 47, similarly to the above-described example.

As described above, the hoist ship 31 is also provided with the tension control units 46a and 46b for adjusting the tension and length of the control wire ropes 44a and 44b. Is a tension controller 19 shown in FIG.
Therefore, the description is omitted.

As described above, according to the present invention, the suspension hook of the hoist can be provided with a relatively simple structure and a lightweight anti-sway device, and the lifting work of heavy objects can be kept safe. It becomes possible. Further, the anti-sway device according to the present invention can be applied to a wide range of work boats, from a small work boat having only one hoist to a large work boat having a plurality of hoists.

The present invention is not limited to the above example. In the above-described example, the case where the suspension device of the hanging hook according to the present invention is applied to the hoist ship has been described.However, the present device can be applied to other types of ships equipped with the hoist other than the hoist ship. It is possible.

[Brief description of the drawings]

FIG. 1 is a side view showing a first example of a hoist ship provided with the anti-swing device according to the present invention.

FIG. 2 is a plan view showing a first example of a hoist ship provided with the anti-swing device according to the present invention.

FIG. 3 is a front view showing a first example of a hoist ship provided with the anti-swing device according to the present invention.

FIG. 4 is a plan view showing a tension control unit of the anti-swing device provided in the hoist ship shown in FIGS.

FIG. 5 is a side view showing a second example of a hoist ship provided with the anti-swing device according to the present invention.

FIG. 6 is a plan view showing a second example of a hoist ship provided with the anti-swing device according to the present invention.

FIG. 7 is a front view showing a second example of a hoist ship provided with the anti-swing device according to the present invention.

[Explanation of symbols]

 1,31 Hoist ship 2,32 Hoist ship hull 3,33 Hoist jib 4,34 Hoist jib shaft 5,35 Jib hoisting wire rope 6,36 Suspension hook hoisting wire rope 7,37 Suspension hook 8 Suspension wire 9 , 38 Wire rope support beam 10,39 Auxiliary beam 11,12,18,40,41,45 Winch 13,42 Vertical connection bar 14,43 Horizontal connection bar 15,44 Control wire rope 16 Guide pulley 17 Acceleration sensor 19,46 , 47 Tension control unit 20 Hydraulic cylinder 21 Cylinder rod 22, 23, 24 Guide pulley 25 Wire tension detection sensor

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Tokio Takeishi 2-22-38, Nishikasai, Edogawa-ku, Tokyo 709 F-term (reference) 3F205 AA10 AC07 AC09 CA01 CA09 DA02 HA06 HB06 KA10

Claims (3)

[Claims] 1. A work boat provided with a hoisting device on a hull, the hoisting device having two or more hanging hooks suspended from a jib tip thereof, wherein the hoisting device is provided between adjacent hanging hooks. A connecting bar for connecting the hanging hooks to each other, a plurality of wire ropes extending from the jib tip toward each of the hanging hooks, and a winding means for winding the wire ropes. An anti-swing device for a suspension hook, wherein the connecting bar is supported from the jib tip by crossing the jib tip and the connecting bar in a substantially X-shape. 2. The apparatus according to claim 1, wherein a tension detecting means for detecting a tension of each of the wire ropes, an acceleration detecting means for detecting an acceleration of the hull in the left-right direction, and a lateral direction of the hanging hook. Moving amount calculating means for calculating the moving amount to, a length adjusting means for adjusting the length of each wire rope,
Further, the acceleration when the hull is tilted is detected by the acceleration detection means, the movement amount of the hanging hook is obtained by the movement amount detection means from the value, and from the obtained movement amount,
The swing hook device according to claim 1, wherein the length of each wire rope is adjusted by the length adjusting means while detecting the tension of each wire rope by the tension detecting means. 3. A work boat comprising the apparatus according to claim 1.