JP2015077913A - Hull reinforcement structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hull reinforcement structure which enables an effective utilization of the residual part of a part where an anchor chain is delivered.SOLUTION: An anchor chain can be preserved in a chain locker 3 in a hull 1, and the hull 1 is reinforced with anchor chain residual parts 5b-5d of an anchor chain delivery part 5a by drawing the residual parts 5b-5d out of the chain locker 3, and by guiding the parts in the lengthwise direction of the hull 1. This constitution can attain a prevention measure such as for a bend to break of the hull 1 due to tidal waves on sailing and an energy conservation.

Description

  The present invention relates to a hull reinforcing structure provided with a chain locker for storing an anchor chain so that the anchor chain can be extended.

  FIGS. 6A and 6B are explanatory diagrams of a conventional hull 1, wherein FIG. 6A shows a state during berthing and FIG. 6B shows a state during operation. For example, a hull 1 of a cargo ship is provided with a chain locker 3 for storing an anchor chain 5a so that the anchor chain 5a can be drawn out at the bow. The anchor portion of the chain locker 3 is housed by being stacked together with the anchor chain feeding portion 5a and the remaining portion 5e, and the base portion of the remaining portion 5e is attached to the partition wall of the chain locker 3 as a shackle or the like. 8 is locked.

  Then, as shown in FIG. 6 (a), in the hull 1 anchored in the harbor, the anchor chain 5a is fed out from the chain locker 3 by the windlass 6 provided on the upper deck, and the anchor attached to the anchor 4 is lowered to the seabed, but before operation, as shown in FIG. 6B, the anchor chain 5a is wound up by the windlass 6 and collected in the chain locker 3 ( For example, see Patent Document 1).

  However, the anchor chain 5a is usually set to a length that is at least twice as long as the maximum length when the anchor 4 is lowered toward the seabed. The remaining part 5e of the part 5a to be fed is accommodated in the chain locker 3 without being used.

  On the other hand, the hull 1 is reinforced to prevent bending or the like due to high waves of the hull 1 in operation. By using the remaining portion 5e of the portion where the anchor chain 5a is extended for the reinforcement, the hull is obtained. It is considered that the reinforcing structure of No. 1 can be simplified and the engine output can be suppressed to save energy.

  The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a hull reinforcing structure that can effectively use the remaining portion of the portion where the anchor chain is fed.

  The present invention is a hull reinforcement structure provided with a chain locker for storing an anchor chain so that the anchor chain can be extended, and the remaining portion of the anchor chain extension portion is pulled out from the chain locker and guided in the length direction of the hull. Thus, the hull is reinforced with the remaining portion of the anchor chain.

  According to the present invention, the remaining part of the extended part of the anchor chain is pulled out from the chain locker and guided in the length direction of the hull so that the hull is reinforced with the remaining part of the anchor chain. Since it comprised, when reinforcing a hull so that it might bend the bending by the high wave of the hull in operation, the reinforcement structure of a hull can be simplified by utilizing effectively the remaining part of the part which the said anchor chain is extended. As a result, the reinforcing material for the hull can be reduced as much as possible, so that the engine output can be suppressed by that much and energy can be saved. As a result, preventive measures such as bending of the hull due to high waves and energy saving are achieved.

  By the way, at the time of operation of the hull, there are a case where the hull is considered to be supported at two points by high waves and a case where the hull is considered to be supported at one point by high waves. Therefore, it is preferable that the pulled-out anchor chain is guided in a U-shape along the longitudinal section of the hull as in the invention described in claim 2.

  According to the second aspect of the present invention, the pulled-out anchor chain is configured to be guided in a U shape along the longitudinal section of the hull. When it is considered to be point-supported, it is reinforced with an anchor chain on the bottom of the ship, and when the hull is considered to be supported at a single point by high waves, it will be reinforced with an anchor chain on the upper deck side. . This prevents the hull from being bent due to high waves.

  Further, during the operation of the hull, the hull may be twisted by high waves. Therefore, as in the invention described in claim 3, it is preferable that the guide routes of the pulled-out anchor chains are provided in two rows so as to be symmetrical with respect to the hull.

  According to the invention of claim 3, since the guide route of the pulled anchor chain is provided in two rows so as to be symmetrical with respect to the hull, when the hull is twisted with high waves during operation, Are reinforced with two rows of anchor chains. This prevents the hull from twisting due to high waves.

  In addition, the anchor chain cannot be used to reinforce the hull unless it is pulled. Therefore, it is preferable that a predetermined tension is applied to the drawn anchor chain as in the invention described in claim 4.

  According to a fourth aspect of the present invention, since a predetermined tension is applied to the pulled-out anchor chain, the anchor chain is pulled, and the hull is reinforced with the anchor-shaped anchor chain. Become. As a result, bending of the hull center due to high waves is reliably prevented.

  Further, the anchor chain may be greatly deformed when pulled. Therefore, as in the invention described in claim 5, it is preferable that the anchor chain is a chain with a stud.

  According to the invention of claim 5, since the anchor chain is a chain with a stud, it is possible to suppress the deformation in the pulled state and to improve the strength. As a result, bending of the hull due to high waves is more reliably prevented.

  According to the present invention, the remaining part of the extended part of the anchor chain is pulled out from the chain locker and guided in the length direction of the hull so that the hull is reinforced with the remaining part of the anchor chain. Since it is configured, the reinforcement structure of the hull can be simplified by making effective use of the remaining part of the part where the anchor chain is extended when reinforcing the hull so as to withstand bending or bending due to high waves of the hull in operation. . As a result, the reinforcing material for the hull can be reduced as much as possible, so that the engine output can be suppressed by that much and energy can be saved. As a result, preventive measures such as bending of the hull due to high waves and energy saving are achieved.

BRIEF DESCRIPTION OF THE DRAWINGS It is a schematic diagram which shows the whole structure of the hull which concerns on one Embodiment of this invention, (a) is a sectional side view, (b) is a top view, (c) is AA sectional drawing of (a). . It is a block diagram of the anchor chain which concerns on this embodiment, Comprising: (a) is a top view, (b) is BB sectional drawing of (a). It is a lineblock diagram of the tensioner concerning this embodiment. It is explanatory drawing which shows the mode that the hull concerning this embodiment is anchored. It is explanatory drawing which shows the mode in operation of the hull which concerns on this embodiment, Comprising: (a) is a case where the hull is supported at two points by high waves, (b) is a case where the hull is supported at one point by high waves. It is explanatory drawing shown. It is explanatory drawing of the conventional hull, Comprising: (a) is a berth and (b) shows a mode in operation.

  1A and 1B are schematic views showing an overall configuration of a hull 1 according to an embodiment of the present invention, in which FIG. 1A is a side sectional view, FIG. 1B is a plan view, and FIG. It is sectional drawing. FIG. 2 is a configuration diagram of the anchor chains 5a to 5d according to the present embodiment. Furthermore, FIG. 3 is a configuration diagram of the tensioners 7a to 7c according to the present embodiment.

  In the reinforcing structure of the hull 1 according to the present embodiment, as shown in FIGS. 1A to 1C, at least a chain locker 3, an anchor 4, and anchor chains 5a to 5d arranged at the bow of the hull 1. A windlass 6, tensioners 7 a to 7 c, and a fastener 8. Since the chain locker 3 and the anchor 4 can be substantially the same as the conventional one, their description is omitted.

  The guide routes of the anchor chains 5 a to 5 d pulled out from the chain locker 3 are provided in two rows so as to be symmetrical with respect to the hull 1, and each guides in a U-shape along the longitudinal section of the hull 1. It has come to be.

  The anchor chains 5a to 5d are a part that is guided to go from the bow part toward the stern part through the feeding part 5a connected to the anchor 4 by a shackle (not shown) and the other part directly below the upper deck of the chain locker 3. 5b, a portion 5c that is guided from the stern portion directly below the upper deck to directly above the bottom portion, and a portion 5d that is guided directly above the bottom portion from the stern portion to the bow portion. . Here, the reason why the anchor chain 5 b is passed directly under the upper deck of the chain locker 3 is that the through hole is to be arranged on the draft of the hull 1.

  As the anchor chains 5a to 5d, for example, as shown in FIG. 2, chain links with studs are connected and used. The chain link with the stud is formed in an oval shape by bending a round shaft, and the link main body 51 formed by welding the attachment portion 52 and the pair of shaft portions 53 and 53 facing the link main body 51. And a pair of shafts 53, 53 are pressed inward so that the studs 54 are crimped to the shafts 53, 53.

  The tensioners 7a to 7c apply predetermined tensions (tensile force, tension) to the anchor chains 5b to 5d when the anchor chains 5b to 5d are pulled out from the chain locker 3 and guided. For example, as shown in FIG. For example, a gear-shaped guide wheel 7a that is rotationally driven by 9a and a ratchet (not shown) for preventing reverse rotation are provided. The predetermined tension is set so that the maximum deflection of the anchor chains 5b to 5d is not more than a specified value.

  Then, the anchor chains 5b to 5d are pulled out from the chain locker 3 and are chained in the order of the tensioners 7a to 7c. The front ends of the anchor chains 5a and 9c are locked with a shackle or the like, and the motors 9a to 9c are driven. Thus, a predetermined tension is applied to the anchor chains 5b to 5d.

  The anchor chains 5b to 5d to which a predetermined tension is applied can maintain the predetermined tension because the guide wheels 7a to 7c do not reverse by the action of the ratchet. When the anchor chains 5b to 5d are removed from the guide wheels 7a to 7c for maintenance or the like, the ratchet may be released.

  FIG. 4 is an explanatory view showing a state in which the hull 1 according to the present embodiment is anchored, and FIG. 5 is an explanatory view showing a state in which the hull 1 according to the present embodiment is in operation, wherein (a) is a hull. When 1 is considered to be supported at two points by the high wave W1, (b) is an explanatory diagram showing a case where the hull 1 is considered to be supported at one point by the high wave W2. Note that the high waves W1 and W2 in FIGS. 5 (a) and 5 (b) should actually be represented in the draft of the hull 1, but are represented here on the bottom of the ship for convenience of explanation.

  Hereinafter, with reference to these drawings, a usage example of the hull 1 according to the present embodiment will be schematically described. Here, the anchor chains 5b to 5d have already been pulled out from the chain locker 3 and chained in the order of the tensioners 7a to 7c, and the ends of the anchor chains 5a to 9c are locked to the fastener 8 with a shackle or the like, and then the motors 9a to 9c. Is driven, a predetermined tension is applied to the anchor chains 5b to 5d.

  As shown in FIG. 4, in the hull 1 anchored in the harbor, the anchor chain 5a is fed out from the chain locker 3 by the windlass 6 provided on the upper deck, and the anchor 4 attached to the tip is lowered to the seabed. ing. And before operating, the anchor chain 5 a is wound up by the windlass 6 and collected in the chain locker 3.

  In the hull 1 in operation, as shown in FIG. 5 (a), consider the case where the mountain of the high wave W1 extends in two directions of the bow and stern in the length direction of the hull 1. . In this case, it is considered that the beam is supported at two points, so that the hull 1 is subjected to stress that is bent so as to protrude downward at the center, but the anchor chain 5d indicated by a thick line in the figure. However, as a result of acting in a direction to cancel out such stress, the hull 1 can be prevented from being bent.

  On the other hand, as shown in FIG. 5 (b), consider a case where a mountain of high waves W <b> 2 is located at one place in the middle of the ship in the length direction of the hull 1. In this case, it is considered that the beam is supported at two points, and the hull 1 is subjected to a stress that is bent so as to protrude upward at the center thereof, but the anchor chain 5b indicated by a bold line in the figure. However, as a result of acting in a direction to cancel out such stress, the hull 1 can be prevented from being bent.

  Although not shown, a case is considered in which a high wave W1 is applied to one of the left and right sides of the hull 1 and a high wave W2 is applied to the other. In this case, torsional stress is applied to the hull 1 as if it were a torsion beam, but as a result of the anchor chains 5a, 5d provided symmetrically acting in a direction to cancel out such stress, Torsion of the hull 1 can be prevented.

  As described above, according to the reinforcing structure of the hull 1 of the present embodiment, the remaining portions 5b to 5d of the extended portion of the anchor chain 5a are pulled out from the chain locker 3 and guided in the length direction of the hull 1. Thus, the remaining portions 5b to 5d are configured to reinforce the hull 1. Therefore, the anchor chain 5a is used to reinforce the hull 1 so that it can withstand bending due to high waves W1 and W2 of the hull 1 during operation. By effectively utilizing the remaining portions 5b to 5d of the portion that is extended, the reinforcing structure of the hull can be simplified. As a result, the amount of reinforcing material for the hull 1 can be reduced, so that the engine output can be suppressed by that much and energy can be saved. As a result, measures to prevent bending and the like of the hull 1 due to the high waves W1 and W2 and energy saving are achieved.

  In the hull 1 of the above embodiment, the guide routes of the anchor chains 5b to 5d drawn from the chain locker 3 are provided in two rows so as to be symmetric with respect to the hull 1, and each of them is a longitudinal section in the hull 1. Although it is configured to guide in a U shape along the surface, other effective guide routes may be configured.

  Moreover, in the hull 1 of the said embodiment, although the chain with a stud is used, depending on the required intensity | strength, you may use a chain, a wire, etc. without a stud. Furthermore, a wire or the like may be temporarily used as a guide line for the anchor chains 5b to 5d only when the anchor chains 5b to 5d are drawn.

  Further, in the hull 1 of the above embodiment, when the anchor chains 5b to 5d are pulled, the guide wheels 7a to 7c of the tensioner are driven by the motors 9a to 9c, respectively. The anchor chains 5b to 5d can also be drawn (using a wire or the like as the guide cable). If it does so, motor 9a-9c will become unnecessary and a guide wheel may become a roller-shaped thing, and can further simplify a hull structure. Furthermore, instead of the motors 9a to 9c, cylinders may be used, and their drive source may be any of electric, hydraulic, pneumatic, and the like.

  Further, in the hull 1 of the above embodiment, the anchor chains 5b to 5d are guided only by the tensioners 7a to 7c, but further guide wheels, guide pipes, guide plates and the like can be provided at appropriate positions between the tensioners 7a to 7c. Thus, the deflection of the anchor chains 5b to 5d can be reduced as much as possible.

  In addition, the scope of application of the present invention is not limited to so-called new shipbuilding, and it can of course be retrofitted to a hull in operation.

DESCRIPTION OF SYMBOLS 1 Hull 3 Chain locker 4 Anchor 5a Anchor chain, its extended part 5b-5d Anchor chain, the remaining part of the extended part 6 Windlass 7a-7c Tensioner, its guide wheel 8 Fastening 9a-9c Motor W1, W2 High wave

Japanese Utility Model Publication No. 01-27516

Claims (5)

A hull reinforcement structure equipped with a chain locker for storing the anchor chain so that it can be extended,
The remaining part of the extended part of the anchor chain is pulled out from the chain locker and guided in the length direction of the hull so that the hull is reinforced with the remaining part of the anchor chain. Hull reinforcement structure.   2. The hull reinforcing structure according to claim 1, wherein the pulled-out anchor chain is configured to be guided in a U-shape along a longitudinal section of the hull.   The hull reinforcement structure according to claim 1 or 2, wherein the guide route of the drawn anchor chain is provided in two rows so as to be symmetrical with respect to the hull.   The hull reinforcement structure according to any one of claims 1 to 3, wherein a predetermined tension is applied to the drawn anchor chain.   The said anchor chain is a chain with a stud, The reinforcement structure of the hull of any one of Claims 1-4 characterized by the above-mentioned.

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