JPS64276B2 - - Google Patents

Description

Detailed Description of the Invention (Purpose of the Invention) This invention provides that when a lifeboat must be launched while the ship is underway, the lifeboat can be launched by diagonally pulling the sling at the moment the lifeboat lands on the water, or during landing on the water. This invention relates to an automatic tracking device that allows a towline to safely tow a lifeboat from the ship in order to prevent the lifeboat from capsizing.

(Prior art) In the past, when launching a lifeboat, the launching device was designed with the assumption that the ship would be stopped, but according to marine accident cases, in the event of a fire on the ship, it would be necessary to launch the lifeboat until the ship was stopped. Because it takes time, international treaties are scheduled to be amended so that lifeboats must be launched even while underway. When launching a lifeboat while the ship is underway, the lifeboat should be swung out from the ship side as shown in the outline drawings in Figures 1 and 2. When the lifeboat B is pulled by the towline P attached to the tip, the lifeboat release device L
It is said that it is relatively easy to separate from the towline, and the towline is less likely to come loose than the davit tip pulley S. Conventionally, one end of the towline was supported or fixed by a person on the ship, and after launching, it was carried along the towline to the ship. Although the operation of transferring to a lifeboat has been carried out since then, it is extremely dangerous in the event of a fire and has become a problem from the perspective of respecting human life.

(Structure of the Invention) This invention fixes the towline of a lifeboat to its tip from the storage position of the lifeboat, and attaches the other end to the boat winch via a capstan foil installed on the upper deck of the ship. Tension is always applied to the towline by wrapping it around a spring-equipped wire reel, and when the lifeboat is launched, after everyone is on board, pull the operating rope inside the boat and release the winch brake to let out the lifeboat's sling from the winch. Then, the sprocket transmission device linked to the rotation of the winch drum releases the pawl that prevents the rotation of the ratchet wheel, which is pivoted on the wire reel's rotating shaft, from its engaged state so that the towline can be let out from the wire reel. The towline automatically follows the moving position, and when the lifeboat lands on the water, the operating rope inside the boat is loosened and the brake lever of the winch is stopped, and in conjunction with this, the pawl engages with the ratchet wheel and is fixed, so the towline is fixed. The lifeboat can be towed from the ship via the tow line and launched safely.

Embodiments of the present invention will be described below with reference to the drawings.

Figure 3 shows a perspective view of the automatic towline following device for launching a lifeboat with a towline.

In Fig. 3, a wire reel 1 with a spring installed on the case of a boat winch G has a wire drum 2 and a ratchet wheel 3 pivotally attached to its rotating shaft, and a towline 6 of a lifeboat B is connected to the tip of the lifeboat. Attach one end to the towline release device 8 installed on the towline and extend it through the capstan foils 7 and 24 installed on the upper deck of the ship and the pulley 5 to the lifeboat storage deck where the boat winch G is installed, and the other end. is wound around the wire drum 2 of the spring-equipped wire reel 1, and tension is constantly applied by the spring to prevent the towline from coming off the pulley.

On the other hand, the lifeboat launching sling R wound around the main drum 23 of the boat winch G is connected to the boat lifting hook 1 protruding from the lifeboat tip via a frame end pulley 22 and a davit end pulley 21.
The lifeboat B is suspended by hooking the link 20 attached to the end of the rope R to the rope 9. The rear end of the lifeboat is also suspended in the same way, so its explanation will be omitted. An auxiliary wire drum 9 is fitted coaxially to the tip of the main drum 23 of the boat winch G, and one end of the rope 10 for operating inside the boat is wound around the arm of the F-shaped brake lever 12 which is pivotally connected to the winch brake shaft W. Pass the pulley 11 pivotally mounted on a pulley shaft protruding from the tip of the lifeboat, and then the pulley 17 installed on the lifeboat storage deck through the pulleys 25 and 26 installed on the lifeboat hanging storage frame F and the davit swinging frame H. An in-boat operation rope 10 is stretched to reach an in-boat operation grip 18 provided at the other end, and a brake lever 12
A counterweight 1 that can be freely adjusted in the longitudinal direction is fitted onto the tip of a counter arm with a rectangular cross section.
The operating rope is formed so as to always maintain tension due to the rotational torque generated by step 3.

The winch brake shaft W has a lower sprocket wheel 14 pivotally attached to the inside of the brake lever 12, and a foil shaft fitted into an upper sprocket foil bearing protruding from the case of the boat winch G with a roller chain 16 attached thereto. A ratchet wheel in which the movement of the brake shaft is transmitted to the upper sprocket wheel 15 pivotally mounted on the upper sprocket wheel 27, and a ratchet claw 4 fitted on the end of the wheel shaft is pivotally mounted on the rotating shaft of the wire reel 1 with a spring. 3, the wire reel rotation shaft is fixed by rotation of the brake shaft by freely engaging and releasably inhibiting clockwise rotation.

(Operation of the invention) The operation of the invention will be explained according to the position of the lifeboat during towline launching shown in Figures 3, 4, and 5. (1) Storage position (X in the figure) Lifeboat B is The davit swing-out frame H, which is tied to the storage frame F installed on the storage upper deck, is hoisted and stored in the storage position by the front and rear suspension ropes R, and the other end of the suspension rope is wound around the boat winch G, while the towline is attached to a wire reel. The other end is attached to the tip of the lifeboat. This position is also the boarding position for all members of the lifeboat.

(2) Swinging position (Y in the diagram) After everyone is on board the lifeboat, move the davit swinging frame H.
When the brake lever 12 is swung to the swinging position on the ship side and the in-boat operating rope 18 is pulled, the brake lever 12 pushes up the counterweight 13 by the in-boat operating rope 10 to release the winch brake.

Due to the rotation transmitted to the sprocket wheel 15 via the roller chain 16 by the sprocket wheel 14 directly connected to the winch brake shaft W, the pawl 4 fitted on the wheel shaft 27 is separated from the ratchet wheel 3 and the towline 6 is attached to the wire. It is ready to be rolled out from the reel.

(3) Lowering position (D in the diagram) As the lifeboat descends, the towline is let out while automatically following the spring wire reel 1, and depending on the position of the lifeboat, the towline is pulled or loosened until it reaches the sea surface. Operate the lifeboat to float.

(4) Landing position (Z in the diagram) The lifeboat will touch the operating rope at 18 at the same time as it lands on the water.
When loosened, the boat winch G enters the braking state, and the pawl 4 engages with the ratchet wheel 3, so even if a pulling force is applied to the towline 6 of the lifeboat, no rotational force is generated on the wire reel, and the lifeboat It will be towed by the ship.

(5) Starting position (M in the figure) Therefore, when the boat lifting hooks 19 are all released from inside the boat, the lifeboat is towed by the towline 6, and when the engine starts and propulsive force is generated in the lifeboat, the towing release device 8 is activated. The boat will be released from the inside and will be separated from the main vessel and launched.

(Effects of the Invention) Since the present invention has the above configuration, it has the following advantages.

(1) Since the towline can be automatically tracked from the storage position to the landing position, there is less chance of the towline becoming detached from the pulley and breaking.

(2) It must be possible for everyone to escape after boarding the boat, and when tension is generated in the towline, it must be possible to adjust it using the in-boat operation rope.

(3) Since automatic tracking of the towline is performed using a spring method, failures are rare, replacement is easy, and maintenance and inspection are easy.

[Brief explanation of drawings]

Figure 1 is a diagram of the procedure for launching a lifeboat towline (front view)
shows. FIG. 2 shows the same figure (plan view). FIG. 3 shows a perspective view of the automatic towline following device. Fig. 4 is an operational explanatory diagram (side view) showing the relative position of the lifeboat for towline launching, and Fig. 5 is the same (front view). Explanation of symbols of main parts, 1... Wire reel with spring, 5... Pulley (for towline), 6... Towline,
7... Capstan foil, 10... In-boat operation rope, 12... Brake lever, 24... Capstan foil, B... Lifeboat, G... Boat winch, W... Winch brake shaft.

Claims (1)

[Claims] 1. When launching a lifeboat, a towline with one end attached to the tip of the lifeboat is stretched through the capstan foil and pulley on the ship, and the other end is wrapped around the towline and the towline is constantly kept under tension. A spring-loaded wire reel that can automatically track is installed on the boat winch, and when the boat winch is braked via the boat winch's brake lever connected to the boat's operating rope, the wire reel is fixed and tension is applied to the towline. A lifeboat towline automatic tracking device characterized in that a removable interlocking device is attached between a brake shaft of a boat winch and a rotating shaft of a spring-type wire reel.