JP4431448B2 - Lifting device - Google Patents

Description

  The present invention relates to an improvement in a boat raising apparatus that suspends a mounted boat such as a rescue boat or a high-speed boat and carries it in and out of the vessel.

  Conventionally, as this type of boat raising device, a crane boom that pivots about a vertical axis and swings out from the deck, a turning device that drives the crane boom, and a crane boom is fed out through a sheave. There is a swing crane type boat raising device that includes a single wire rope and one winch that winds up the wire rope, and that loads and unloads a loaded boat that is suspended on the wire rope by rotating a crane boom. .

  Further, Patent Document 1 includes a davit that rotates about a horizontal axis with respect to the ship, suspends the mounted boat through two wire ropes fed out from the davit, and rotates the davit to wire rope. There has been proposed a davit-type boat raising device that loads and unloads a loaded boat that can be hung on a ship.

The swing crane type boat raising device does not need to have a large davit on the ship like the davit type boat raising device, and the structure can be simplified.
JP 2002-087377 A

  However, when the mounted boat lifted by the swing crane type lifting device is unloaded, when the operator connects the hook of the wire rope extending from the ship to the sling ring extending from the mounted boat on the mounted boat, For example, it is necessary to lift and hold a sling and a hanging ring of several tens of kg, and there is a problem that it is difficult to perform this slinging operation on a mounted boat that is shaken at sea.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a boat raising apparatus that can easily perform a slinging operation even on a moving mounted boat.

  The present invention includes a suspension ring connected to a mounted boat via a sling, and performs a slinging operation for connecting a wire rope extending from the ship to the suspension ring via a hook, and the mounted boat suspended from the wire rope is provided. In a boat raising / unloading device to / from the ship, a ring support rod is provided on the mounted boat, and a sling operation is performed to connect the hook to the suspension ring while holding the sling and suspension ring through the ring support rod. It is characterized by having a configuration.

  According to the present invention, when an operator connects a wire rope hook extending from a ship to a sling suspension ring extending from the mounted boat on the mounted boat, the ring supporting rod is set on the mounted boat and A slinging operation is performed in which the hook is connected to the suspension ring while the sling and the suspension ring are lifted and held. This makes it easy for an operator to lift and hold a sling and suspension ring, for example, several tens of kilograms, and to easily and safely perform this slinging operation by holding the ring support rod even on a swinging mounted boat. it can.

  Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.

  As shown in FIGS. 1 to 4, a boat rest 11 on which a composite loaded boat (RIB) 4 is mounted is installed on the deck 2 of the ship 1, and a swivel crane type lift that loads and loads the loaded boat 4 is carried out. A boat device 5 is provided.

  The boat raising device 5 is rotated about a vertical axis and is swung out from the deck 2, a turning device 8 that drives the crane boom 6, and a crane boom 6 that is fed out through a sheave 12. And a single winch 9 that winds the wire rope 7.

  A hook 20 is coupled to the tip of the wire rope 7, and the hook 20 is detachably connected to the suspension ring 18 of the sling 19 of the mounted boat 4. The sling 19 is composed of four wire ropes extending in four directions from the suspension ring 18, and one end of each wire rope is connected to the four front and rear portions of the mounted boat 4.

  The stainless steel wire rope 7 has a non-rotating structure, and the twisting of the wire rope 7 accompanying the increase or decrease of the tension is reduced, so that the mounted boat 4 suspended on the wire rope 7 is prevented from rotating. ing.

  The crane boom 6 is provided with a stabilizer 80, and the bow portion of the mounted boat 4 lifted to the vicinity of the crane boom 6 is brought into contact with the stabilizer 80, thereby suppressing the pitching and rolling of the mounted boat 4. Yes.

Next, the operation of the boat raising device 5 will be described. The operation when the onboard boat 4 is thrown in while the ship 1 is sailing is performed according to the following procedure.
Remove the lashing rope (not shown) hung on the mounted boat 4 on the boat rest 11 and drive the winch 9 to raise the mounted boat 4 at a low speed by about 0.8 m.
A worker gets on board the mounted boat 4, and the bow of the mounted boat 4 is secured to the stabilizer 80.
-The turning device 8 is driven to rotate the crane boom 6 by about 90 °, and the loaded boat 4 gets out of the ship.
-The bow of the mounted boat 4 to the stabilizer 80 is released and the boat rope 13, the front retainer 14, and the rear retainer 15 are operated to adjust the rotation position of the mounted boat 4, Keep approximately parallel to 1.
・ Drive the winch 9 and lower the mounted boat 4 at a low speed by about 1.8 m.
-The turning device 8 is driven to rotate the crane boom 6, and the mounted boat 4 is pressed against the side of the ship 1 to put it on the stomach. 16 is secured (see FIG. 2). At this time, the mounted boat 4 takes a posture inclined about 5 ° toward the main boat 1 (see FIG. 3).
-Mount crew and equipment with the mounted boat 4 on the stomach.
Remove the front retainer 14 and the rear retainer 15 from the cleats 16 and take them into the mounted boat 4.
-Adjust the boat rope 13 and extend it appropriately.
-The turning device 8 is driven to rotate the crane boom 6 so that the loaded boat 4 gets out of the boat to the maximum.
-The winch 9 is driven to lower the mounted boat 4 at a low speed. When the mounted boat 4 reaches the water, the descending speed of the mounted boat 4 is increased, and the wire rope 7 is further extended about 4 m after landing. As a result, the loaded boat 4 is pulled to the ship 1 via the boat rope 13.
The hook 20 is removed from the suspension ring 18 of the sling 19 and the wire rope 7 is dropped between the mounted boat 4 and the ship 1, and then the winch 9 is driven to wind the wire rope 7 at a high speed.
-The engine of the mounted boat 4 is started, the mounted boat 4 is advanced at a higher speed than the main boat 1, and the boat rope 13 is removed from the bow of the mounted boat 4.

On the other hand, the operation when the mounted boat 4 is withdrawn during the navigation of the ship 1 is performed according to the following procedure.
-Advance the mounted boat 4 in parallel with the main boat 1, connect the boat rope 13 to the bow of the mounted boat 4, and stretch the boat rope 13 between the main boat 1 and the mounted boat 4.
After driving the winch 9 and feeding the wire rope 7 onto the mounted boat 4, the hook 20 of the wire rope 7 is connected to the suspension ring 18 of the sling 19.
-The winch 9 is driven to wind the wire rope 7 at a medium to high speed. As a result, the mounted boat 4 is lifted from the sea, and the mounted boat 4 is raised to the top dead center near the crane boom 6.
-After draining the mounted boat 4 sufficiently, the winch 9 is driven and the mounted boat 4 is lowered about 1.8 m at a low speed.
-The turning device 8 is driven to rotate the crane boom 6, and the mounted boat 4 is pressed against the side of the ship 1 to put it on the stomach. 16 is secured (see FIG. 2).
-With the mounted boat 4 on the stomach, move crew and equipment to the Vessel 1.
-The turning device 8 is driven to rotate the crane boom 6, and the mounted boat 4 is swung out to the maximum.
-Drive winch 9 and raise loaded boat 4 at low speed by about 1.8m.
-The bow of the loaded boat 4 is secured to the stabilizer 80.
-The turning device 8 is driven to rotate the crane boom 6 by about 90 °, and the loaded boat 4 is put into the ship.
-The bow of the mounted boat 4 with respect to the stabilizer 80 is released, the winch 9 is driven, the mounted boat 4 is lowered about 0.8 m at a low speed, and the mounted boat 4 is placed on the boat rest 11.
-Hang a securing rope (not shown) on the loaded boat 4 to secure it.

  By the way, when the hook 20 of the wire rope 7 is connected to the suspension ring 18 of the sling 19 on the mounted boat 4 at sea, the operator removes the sling 19 and the suspension ring 18 that extend over several tens of kg. There is a problem that it is difficult to carry out this slinging work on the onboard boat 4 that needs to be lifted and held.

  In response to this, as shown in FIGS. 3 and 4, the present invention is provided with a ring support rod 30 that stands on the mounted boat 4, and the sling 19 and the suspension ring 18 are attached to the ring support rod 30 during the sling operation. It is configured to be lifted and held.

  As shown in FIG. 5, the ring support rod 30 is formed in a cylindrical shape by an aluminum pipe, and has a length that fits between the suspension ring 18 and the bottom of the mounted boat 4 with the sling 19 extended.

  A pair of recesses 32 are formed in the upper end portion 31 of the ring support rod 30, and the suspension ring 18 is erected on the upper end portion 31 of the ring support rod 30 by seating the suspension ring 18 over the respective recesses 32. Supported by

  A support seat 40 is fixedly provided on the mounted boat 4. The support seat 40 includes a disk-shaped flange 41 and a protrusion 42 protruding from the flange 41 in a columnar shape. The flange 41 is fastened to the bottom of the mounted boat 4 via a plurality of bolts (not shown). The support seat 40 is configured to support the ring support rod 30 in an upright state by fitting the lower end portion 33 of the ring support rod 30 to the protrusion 42.

  As described above, the ring support rod 30 is attached to the mounted boat 4 during the sling operation for connecting the hook 20 of the wire rope 7 to the suspension ring 18 of the sling 19 on the mounted boat 4 on the sea during the above-described lifting. The hook 20 of the wire rope 7 is connected to the suspension ring 18 of the sling 19 in a state of being erected via the support seat 40 and supporting the suspension ring 18 on the recess 32 of the ring support rod 30. As a result, the operator can easily lift and hold the sling 19 and the suspension ring 18 of several tens of kg, and the slinging work can be easily and safely held on the ring support rod 30 even on the swinging mounted boat 4. It can be carried out.

  In the state where the mounted boat 4 is separated from the wire rope 7, the ring support rod 30 is not obstructed by removing the ring support rod 30 from the support seat 40.

  Further, when the loading boat 4 is thrown into the sea and the hook 20 of the wire rope 7 is removed from the suspension ring 18 of the sling 19, the operator is shaken by setting the ring support rod 30 on the loading boat 4. This operation can be easily and safely performed on the mounted boat 4 by being held by the ring support rod 30.

  The present invention is not limited to the above-described embodiment, and it is obvious that various modifications can be made within the scope of the technical idea.

  INDUSTRIAL APPLICABILITY The present invention can be used for a boat raising device that suspends an onboard boat and carries it in and out of the vessel.

The side view of the boat raising apparatus which shows embodiment of this invention. The top view of a boat raising apparatus. The front view of a boat raising apparatus. A side view of the same boat. The perspective view of a ring support bar and the like.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Vessel 4 Mounted boat 5 Lifting device 6 Crane boom 7 Wire rope 18 Suspension ring 19 Sling 30 Ring support rod 31 Upper end portion 32 Recessed portion 40 Support seat

Claims (3)

A suspension ring connected to the mounted boat via a sling is provided, and a slinging operation is performed to connect a wire rope extending from the ship to the suspension ring via a hook. In a boating device that
A ring support rod that can be stood on the mounted boat is provided, and the sling and the suspension ring are lifted and held via the ring support rod, and a slinging operation for connecting the hook to the suspension ring is performed. Lifting device characterized.   The boat raising apparatus according to claim 1, wherein a concave portion for seating the suspension ring is formed at an upper end portion of the ring support rod.   The boat raising apparatus according to claim 1 or 2, further comprising a support seat that is fitted to a lower end portion of the ring support bar and supports the ring support bar in an upright state.

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