JP3078051U - Anchor ship - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To make it possible to relatively increase the suspension capacity of an anchor suspension device 4 compared to the size of a hull 1. SOLUTION: An anchorage ship having a self-propelled running means 8 and an anchor hanging device 4 is provided with a plurality of forward and backward drainage bodies 5, 5a, 5a arranged in parallel in the left-right direction.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 TECHNICAL FIELD The present invention relates to an anchorage ship used when an anchor of another ship is suspended and moved.

[0002]

[Prior art]

 There is already an anchor ship with a self-contained navigation means and an anchor hanging device mounted on a hull consisting of a single drainage fuselage. In this type of anchor ship, the suspension capacity of the anchor suspension device is limited due to the lateral stability of the hull. Conventionally, if the size of the hull is, for example, about 19 G / T, the maximum hanging capacity of the anchor hanging device mounted on the hull is about 10 tons. In order to achieve this suspension capacity of about 30 tons, it is necessary for the marine vessel of the Ministry of Transport to inspect the vessel, and the size of the hull should be about 100 G / T.

[0003] This anchorage vessel is used, for example, as follows. In other words, large ships for construction work, such as crane ships and pile-dried ships, are generally equipped with four anchors corresponding to both the bow and stern. It is necessary to drive into a distant place, and it is not impossible for the own ship to drive. However, since the labor is enormous, the anchorage boat is used. At this time, each anchor is lifted by the anchor hanging device, and the anchored state is maintained and moved to the place where the anchor is driven. After arriving at the place, the anchor is separated from the anchor hanging device and dropped to the sea floor.

[0004]

[Problems to be solved by the invention]

 It is an object of the present invention to provide an anchorage ship that has a large suspension capacity compared to the size of a hull and can perform efficient work.

[0005]

[MEANS FOR SOLVING THE PROBLEMS] In order to achieve the above object, according to the present invention, a self-propelled cruising ship having a self-propelled running means and an anchor hanging device as described in claim 1 has a parallel arrangement in the left-right direction. It will be equipped with multiple drainage bodies facing forward and backward. As a result, the lateral stability of the entire ship can be greatly increased while maintaining the same G / T, and the suspension capacity of the anchor hanging device can be greatly increased in relation to the size of the hull. It is. In addition, the running resistance of the hull is kept relatively small despite the increase in the lateral stability, and efficient work can be performed.

The present invention is embodied as follows. That is, as described in claim 2, a propeller and an engine for self-propelled traveling are provided, and the propeller is driven via a conical drive shaft inclined so as to gradually descend from the engine side toward the propeller. Configuration. In this way, the propeller diameter can be increased in the same stern shape, and the propeller can be efficiently propelled even in relatively shallow waters.

[0007] In addition, as set forth in claim 3, a single or a plurality of relatively large drainage bodies and a relatively small drainage body are provided, and a shear and an anchor hanging above the relatively large drainage body. The system is provided with a device. As a result, the shears and anchoring devices are firmly supported almost independently of the strength of the relatively small drainage fuselage.

[0008] Further, as set forth in claim 4, the hanging wire of the anchor hanging device is suspended from the front of a relatively large drainage body via a shear, while a ballast tank is provided at a rear portion of the relatively large drainage body. Configuration. In this way, the trim of the hull when the anchor is lifted by the anchor hanging device is effectively corrected.

[0009] As described in claim 5, the hull is less than 20 G / T, and the suspension capacity of the anchor hanging device is about 15 tons or more. An anchor of about 15 tons or more that could not be lifted will be lifted.

[0010] Further, as described in claim 6, a towing facility, a pushing facility and a water supply facility are provided, and the towing facility, the pushboat and the water supply vessel are used. According to this, it is often necessary to move a crane ship or a pile driving ship to which an anchor ship drives an anchor. In such cases, it is often necessary to supply water such as drinking water, and in such cases, the operations of anchoring, towing, pushing, and water supply can be performed in an appropriate combination.

[0011]

[Embodiment of the invention]

 FIG. 1 is a side view of the anchorage ship according to the present invention, FIG. 2 is a plan view of the anchorage ship, FIG. 3 is a plan view showing a lower part of a foundation deck of the anchorage ship, and FIG. FIG. 3 is an explanatory front view showing various forms of a hull.

In FIG. 1 to FIG. 3 and FIG. 4A, reference numeral 1 denotes a hull of about 19 G / T provided with a self-propelled navigation means, on which a steering room 2, a shear 3, and a shear 4 are provided. An associated anchoring device 5 is provided.

First, the hull 1 will be described. The hull 1 includes a plurality of drainage bodies 5, 5a, 5a which are arranged in the front-rear direction and are arranged in the left-right direction f1. The drainage body 5 at the center in the left-right direction is relatively large and elongated, while the drainage bodies 5a located on the left and right sides of the drainage body 5 are relatively small and elongated. The drainage bodies 5, 5a, 5a are integrally connected at a connecting portion 6, and a connecting flat deck 7 is fixed to the upper surface of the drainage body 5, 5a, 5a and the connecting portion 6. .

The relatively large drainage body 5 includes a pair of left and right fresh water tanks FWT inside a central portion of the length, and a pair of left and right ballast tanks BWT at the rear, between the fresh water tank FWT and the ballast tank BWT. The engine room ER is formed.

The drainage bodies 5a on the left and right sides simply function as floating bodies, and one of the bodies is immersed deeper in the water when the hull 1 is tilted sideways, and receives greater buoyancy than the other. ing.

The self-propelled running means will be described. Two main engines 8 and 8 are provided inside the engine room ER, and a pair of propellers 9 and 9 are located at lower left and right portions on the outer rear lower part of the drainage body 5. Each of the propellers 9 is tilted so as to gradually descend rearward from the corresponding main engine 8 and is fixed to the rear end of a conical drive shaft 10 driven by the corresponding main engine 8. At this time, the inclination angle of the conical drive shaft 10 is about 5 to 15 degrees. A rudder plate 11 is provided at the rear of the right and left propellers 9, 9 and at the center of the rear lower part of the drainage body 5 so as to be capable of swinging about a rudder shaft 11a.

The shears 3 are a pair of right and left struts extending obliquely upward in a side view from the front left and right portions of a connecting flat deck 7 located at an upper portion of a relatively large drainage fuselage 5 in a narrowed front shape in a plan view. It comprises members 12 and 12 and a top connecting member 13 connecting the front ends of the support members 12 and 12. At this time, the lower ends of the support members 12 are supported by the connecting flat deck 7 via the horizontal shaft 14. The shears 3 are tilted forward by supporting wires 15, 15 stretched between the relatively upper portions of the support members 12, 12 and the connecting flat deck 7 at the upper center of the length of the drainage body 5. Is fixedly held.

The anchor hanging device 4 includes an electric winch 16 provided on the connecting flat deck 7 above the fresh water tank FWT, hanging wires 17, 18 driven and displaced by the winch 16, and these wires 17, 18. Guide means. The winch 16 includes a first wire drum 19 and a second wire drum 20 that are rotated by electric power, and a pair of left and right warping ends 21. The in-line means of the wires 17 and 18 are a pulley 22 attached to the distal end of the drainage body 5, a pulley 23 provided at a position below the center of the top connecting member 13 of the shear 3, and a pulley 23 of the top connecting member 13. It consists of a pulley 24 provided at the upper center.

The hanging wire 17 wound around the first wire drum 19 is suspended from the front of the drainage body 5 via a pulley 23, and a hanging hook 25 is attached to the tip thereof. The hanging wire 18 wound around the drum 20 is suspended from the pulley 24 in front of the drainage body 5. Further, the suspension wire 17 wound around the first wire drum 19 is detached from the pulley 23 as necessary, and instead is suspended via the pulley 22 in front of the drainage body 5 or driven and displaced by a separately provided winch. The suspension wire can likewise be suspended in front of the drainage body 5 via the pulley 22.

At this time, the suspension capacity of the first wire drum 19, the suspension wire 17, the pulley 23 and the suspension hook 25 is about 30 tons, and the second wire drum 20, the suspension wire 18 and the pulleys 22, 24 Is about 10 tons.

A towing hook 26 is provided on the connecting flat deck 7 as a towing facility for towing another vessel. In addition to this, a water supply facility (not shown) for supplying fresh water to the other vessel, and other vessels are provided. Is provided with a pushing device (not shown) for pushing the button.

Next, an example of use of the above-mentioned anchorage ship according to the present invention will be described. In large construction work vessels, for example, anchors for positioning the right and left portions of the bow are provided on board. When this construction work ship arrives at the target position, it is necessary to drive each of these anchors in sequence to a specific position on the seabed in order to position it.

A typical explanation of the driving process of one anchor is as follows. First, an anchor on a ship such as a construction work boat is first lifted by using a suspending wire 17 or 18 corresponding to the weight of the anchor. Take it out to the sea outside, and then, if necessary, immerse the anchor in the sea while lifting it, and sail on its own to the driving position. Separate the anchor and let it fall to the sea floor.

In this process, while the anchor is lifted, the lateral stability of the hull 1 tends to decrease. However, since the drainage bodies 5a on the left and right sides are present, the lateral stability is still sufficient. Therefore, the work can be carried out smoothly and safely under the condition that the hull is less rolled.

In some cases, the sea area where the work is performed is shallow, but even in such a case, the propeller 9 rotated by the conical drive shaft 10 has a diameter as large as possible, and the flow of the boosted water is reduced. By flowing diagonally downward, relatively large propulsion is effectively generated.

When the anchor is lifted, the hull 1 may be excessively trimmed due to its weight. In this case, seawater is supplied to the ballast tank BWT to increase the stern draft, and the hull 1 Is corrected to an equal draft condition. At this time, since the ballast tank BWT is located at the rear of the relatively large drainage body 5, the correction is effectively performed.

In addition, the anchors that have been lifted may sway right and left as the hull 1 rolls due to the rough waves over the sea. By supplying the hull, the lateral stability of the hull 1 is effectively increased, and the left and right sway of the anchor is suppressed.

The load of the anchor is applied to the shears 3 and the anchor hanging device 4, and most of the load is reliably supported by the relatively large drainage body 5 having a large longitudinal strength. The strength of the relatively small drainage body 5a and its surrounding structure is relatively reduced, which contributes to reducing the weight of the hull.

Further, construction work boats and the like, which have insufficient self-propelled facilities, are often moved by a pushboat or tugboat, or supplied with fresh water for daily use from a water supply boat. In addition to the original work of performing the driving treatment, the construction work boats, etc., which are the target of the driving processing, are towed or supplied with water. This eliminates the need to separately call another pushboat, tugboat or water supply boat. In addition, it is permissible to perform only the role as a pushboat, tugboat or water supply boat.

Although the above-mentioned example of the anchor ship is of a three-barrel type as shown in FIG. 4A as described above, it can be modified as follows. That is, as shown in FIG. 4B, a twin-body type having two relatively large drainage bodies 5 'is provided, or two relatively large drainage bodies 5 "are provided as shown in FIG. The four-body type is provided with a relatively small drainage body 5a 'on each of the left and right sides of the "5". In this case, the anchoring device 4 and the shears 3 are provided above the two relatively large drainage bodies 5' or 5 ". A self-propelled means and a ballast tank are provided for each of the relatively large drainage bodies 5 'or 5 ".

[0031]

【The invention's effect】

 According to the present invention configured as described above, it is possible to greatly increase the lateral stability of the entire ship while maintaining the same G / T, thereby increasing the suspension capacity of the anchoring device. In addition to this, it is possible to greatly increase the size of the hull and to perform the hanging and moving process of the anchor smoothly and safely under the condition that the hull does not sway and the anchor moves left and right. Despite the increase in stability, the hull's hull resistance is kept relatively low, allowing efficient work.

According to the second aspect of the present invention, the diameter of the propeller can be made relatively large under the same stern shape, and the energized water flow by the propeller goes obliquely downward. Efficient propulsion can be performed even in shallow waters.

According to the third aspect of the invention, the shears and the anchoring device can be firmly supported by the relatively large drainage body regardless of the strength of the relatively small drainage body. The relatively small drainage fuselage and its surrounding structure can be made relatively lightweight.

According to the fourth aspect, the bow trim when the anchor is lifted can be effectively corrected.

According to the fifth aspect, a small hull of less than 20 G / T can stably lift even an anchor of 15 tons or more, which has not been lifted conventionally. In addition, since this is a small hull of less than 20 G / T, the labor and cost involved in the inspection by the Shipping Bureau of the Ministry of Transport can be greatly reduced.

According to the sixth aspect, it is possible to perform push-pull movement of the other ship and water supply to the other ship in combination with the driving of the anchor of the other ship, thereby reducing the cost of these operations. Can be reduced.

[Brief description of the drawings]

FIG. 1 is a side view of the anchorage ship according to the present invention.

FIG. 2 is a plan view of the windlass.

FIG. 3 is a plan view showing a portion below a foundation deck of the anchorage vessel.

FIG. 4 is an explanatory front view showing various forms of a hull of the anchorage boat.

[Explanation of symbols]

 Reference Signs List 3 shear 4 anchor hanging device 5 relatively large drainage body 5 'relatively large drainage body 5 "relatively large drainage body 5a' relatively small drainage body 8 main engine 9 propeller (self-propelled running means) 10 conical drive shaft 17 suspension Wire 18 Hanging wire 26 Towing hook (towing equipment) BWT Ballast tank

Claims (6)

[Utility model registration claims] 1. An anchorage ship having a self-propelled running means and an anchor hanging device, comprising: a plurality of forward-rearward drainage bodies arranged side by side in a lateral direction. 2. A propeller and an engine for self-propelled cruising, wherein the propeller is driven via a conical drive shaft inclined so as to gradually descend from the engine side to the propeller. An anchor ship according to 1. 3. A relatively large drainage body comprising one or more relatively large drainage bodies and a relatively small drainage body, wherein a shearing and anchoring device is provided above the relatively large drainage body. Item 2. An anchor ship according to Item 2. 4. The system according to claim 3, wherein a hanging wire of the anchor hanging device is suspended in front of a relatively large drainage body via a shear, while a ballast tank is provided at a rear portion of the relatively large drainage body. Anchor ship as described. 5. The apparatus according to claim 4, wherein the suspension capacity is less than 20 G / T and the suspension capacity of the anchor suspension apparatus is about 15 tons or more.
Anchor ship as described. 6. The anchorage ship according to claim 5, comprising a towing facility, a pushing facility and a water supply facility, and also being used as a tugboat, a pushboat and a water supply vessel.