JP2011056972A - Hull construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a hull construction method capable of constructing a hull in a horizontal construction yard on land without using a construction dock, the hull construction method capable of shortening a construction period, and the hull construction method capable of easily and safely transferring the hull onto a barge. <P>SOLUTION: The hull S is divided and dividedly constructed into a hull main part Sa and a hull rear part Sb, a part of the hull main part Sa is dividedly constructed as a hull module Sm, the hull main part Sa including the hull module Sm is constructed by moving its hull module Sm, and then a hull rear part Sb is linearly moved and united to the hull main part Sa by a moving device 10 and a moving jack device to complete the hull S. Afterward, the hull S is transferred to a first carrying passage 4 by moving in the ship width direction, and is moved forward in the ship length direction along the first carrying passage 4, and is transferred onto the barge 50, and afterward, is launched by sinking the barge 50. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for constructing a hull in a horizontal construction yard on land, and more particularly to a method for constructing a hull in which a construction period is shortened, equipment costs are reduced, and a barge is used for launching.

  Conventionally, when a hull is constructed, a stern or a construction dock is used, and particularly in the case of a large ship, the latter construction dock is often used. The construction of this building dock is very expensive. Therefore, a technique is also known in which a hull is built not in a building dock but in a horizontal construction yard on land, and after the built hull is transported onto a barge, the hull is launched by sinking the barge.

  In the ship construction method of Patent Document 1, after assembling the hull parts divided into two at the onshore assembly site, these hull parts are transferred in the direction of the ship to the barge on the quay and on the barge. The hulls are completed by combining the hull parts. After the hull is completed, move the hull and barge to the launch point, sink the barge and launch the hull.

  In the lateral launch method of Patent Document 2, a hull constructed on land is supported by a plurality of skid shoes and hydraulic jacks, and the hull, skid shoes, and hydraulic jacks slide sideways along the skid beam as a conveyance path in the width direction of the ship. Then, the hull is self-levitated by moving it onto the barge by lateral movement and then sinking the barge.

JP 2006-182296 A Special table 2007-523011 gazette

  The ship construction method of Patent Document 1 is not a dock for construction, but after building two hull divisions at an onshore assembly site, and then transferring to a marine barge to complete the hull assembly. Is advantageous. However, in this ship construction method, since it is necessary to perform construction work that combines the hull divisions on the barge, the barge is occupied for a long period of time as an assembly site. There is a problem that it is difficult to increase the work efficiency on the barge.

  In the lateral launching method of Patent Document 2, after building a hull on land, the hull is moved laterally along the skid beam and transferred onto the barge by lateral movement in the width direction of the ship. The period can be shortened. However, since the hull is moved in the width direction and transferred onto the barge, the transfer weight per unit movement distance acting on the barge increases when transferring the hull weight from the land side to the barge. Since the rolling moment acting on the barge is very large, stability and safety of hull transfer is lacking, and a special barge equipped with special pump equipment for pouring and draining ballast water at a large flow rate is required It becomes.

  An object of the present invention is to provide a hull construction method capable of constructing a hull in a horizontal construction yard on land without using a construction dock, a hull construction method capable of shortening the construction period, and a ship hull can be easily and safely transferred onto a barge. It is to provide a hull construction method.

  The hull construction method according to claim 1 is a method of building a hull on land, wherein a hull rear part including an engine room and a main hull part other than the rear part of the hull are arranged in a straight line and divided in a horizontal construction yard on land. A first step, a second step in which the rear part of the hull is linearly moved toward the main part of the hull to form a hull, and the hull is linearly moved in the direction of its length along the conveyance path provided in the building yard. A third step of moving and transferring onto a barge that touches the end of the transport path.

The invention of claim 2 is characterized in that, in the invention of claim 1, after the second step and before the third step, the hull is moved in the ship width direction and moved onto the transport path. .
The invention of claim 3 is characterized in that, in the invention of claim 2, after the third step, the barge is sunk to launch the hull.

According to the first aspect of the present invention, the hull can be constructed in a horizontal construction yard on land and transferred to the barge, and the hull can be launched through the barge, so that it can be constructed without using a construction dock. This is advantageous in terms of equipment costs.
The hull requires a longer construction period than the main hull because the rear hull and the main hull are divided and constructed in a straight line, and then the rear hull is moved linearly toward the main hull and combined. Since the rear part of the hull can be constructed in accordance with the main part of the hull by constructing the rear part in two stages (places), the construction period of the hull can be shortened.
The hull is moved over the barge by moving linearly in the direction of the ship along the conveyance path provided in the building yard. Therefore, when transferring, the hull is transferred over time while maintaining a small pitching moment acting on the barge. Therefore, the transfer work on the barge can be performed easily and safely.

According to the second aspect of the present invention, the hull is not constructed on the conveyance path, but is constructed at a location shifted from the conveyance path, moved in the width direction of the ship and moved onto the conveyance path. It can also be used to transport hulls built in
According to the invention of claim 3, since the hull is transferred onto the barge and then the barge is settled and the hull is launched, the hull can be easily launched.

It is a partial layout figure of the hull construction factory concerning the example of the present invention. It is the II-II sectional view enlarged view of FIG. It is a side view of the movement apparatus on a 1st conveyance path. It is a front view of the moving apparatus of FIG. It is a top view of the moving apparatus of FIG. It is a top view of the 1st construction stage. It is the VII-VII sectional view taken on the line of FIG. It is a top view of the 2nd construction stage and the 3rd construction stage. It is the IX-IX sectional view taken on the line of FIG. It is the XX sectional view taken on the line of FIG. It is a front view of a barge. It is a schematic process diagram of a hull construction method. It is a front view of the hull and barge before launch. It is a front view of the hull and barge after launch.

  Hereinafter, modes for carrying out the present invention will be described based on examples.

  As shown in FIG. 1, in this hull construction factory and hull construction method, the hull S is divided into a hull main part Sa and a hull rear part Sb, and a part of the hull main part Sa is divided as a hull module Sm. The hull module Sm is constructed and the hull main part Sa including the hull module Sm is built, the hull rear part Sb is linearly moved by the moving device 10 and the moving jack device 34, and united with the hull main part Sa. After the hull S is completed, the hull S is moved in the width direction and moved to the first conveyance path 4, moved forward along the first conveyance path 4 in the length direction of the ship, transferred onto the barge 50, and then the barge 50 is settled. To launch. In FIG. 1, the hull S has its bow directed to the right in FIG. 1. Hereinafter, the front, rear, left and right of the hull will be described as front, back, left and right.

  A hull construction factory F shown in FIG. 1 is an equipment for constructing a hull S, and a factory for processing a large number of parts for building a hull and assembling a hull block is provided at a place not shown. The hull construction factory F includes a horizontal construction yard 1 on land, a barge pier 3 extending from the quay 2 of the construction yard 1 to the sea, a barge 50, and the like. The surface of the building yard 1 is a yard surface made of concrete except for devices and structures.

  The construction yard 1 includes a first conveyance path 4 that is linearly arranged in the front-rear direction to the tip of the barge berthing part 3 in order to move the hull S in the captain direction, and a first conveyance path behind the quay 2. The first construction area 5 that can be constructed by dividing the hull S on both sides in the left-right direction 4 and the hull SA that is adjacent to the rear of the first construction area 5 and similar to the hull S on the left and right sides of the first transport path 4. It has the 2nd construction area 6 etc. which can be divided and built. The first construction area 5 and the second construction area 6 have the same configuration, and the first conveyance path 4 is disposed so as to extend linearly in the front-rear direction over both construction areas 5 and 6. ing. Since the first and second construction areas 5 and 6 have the same configuration, the first construction area 5 will be described below.

  As shown in FIG. 1 and FIG. 2, the first transport path 4 includes a pair of transport path surfaces 7 that are linearly disposed along the left and right side portions, and a linear shape along one transport path surface 7. A pair of guide rails 8 arranged and capable of guiding the moving device 10 (see FIGS. 3 to 5), and a pair arranged linearly along the other conveyance path surface 7 and capable of guiding the moving device 10 A pair of traveling rails 12 etc. that are linearly disposed between the guide rails 9 and the pair of conveying road surfaces 7 and on which the tower crane 11 can travel. The conveyance path surface 7 is made of a steel plate and is provided over the entire length in the length direction of the first conveyance path 4. Each of the guide rails 8 and 9 is composed of two strip plates arranged at a small interval, and the guide rails 8 and 9 are respectively projected on the respective conveyance path surfaces 7. On the traveling rail 12, three tower cranes 11 are arranged so as to be movable over the first construction area 5 and the second construction area 6.

  Next, the moving device 10 will be described with reference to FIGS. Although the moving device 10 on the guide rail 8 side will be described, the moving device 10 on the guide rail 9 side has the same configuration. The moving device 10 includes a substantially rectangular support base 10a on which the hull S can be placed at the upper end, a lattice-like lower frame 10b, and six vertical frames that connect the support base 10a and the lower frame 10b in the vertical direction. A total of ten caster wheels 10d, consisting of 10c and six caster wheels 10d provided on a pair of long sides of the lower frame 10b and four caster wheels 10d provided on a pair of short sides. And a total of 12 brackets 10e fixed to the outer periphery of the side wall of the support 10a, a pair of air ejection mechanisms 10A, and the like.

  The air ejection mechanism 10A is fixed to the lower end surface of the support base 10a and incorporates a double acting air cylinder for raising the support base 10a, and is fixed to the lower portion of the main body part 10f and pressurizes the conveyance path surface 7 An air ejection pad 10g capable of ejecting air, a guide roller 10h that is rotatably mounted at four corners of the air ejection pad 10g and contacts the inner side surfaces of the pair of guide rails 8 to guide the traveling direction of the moving device 10 It has. 3 and 4, the guide rail 8 is located between the guide roller 10h and the caster wheel 10d on the long side of the lower frame 10b, and can contact the guide roller 10h. Pressurized air is supplied to and discharged from the external pressurized air supply source by the air hose to the double acting air cylinder of the main body 10f, and the air ejection pad 10g is also pressurized by the air hose from the external pressurized air supply source. Air is supplied and discharged.

  As described above, when the construction is performed while the hull S is placed and supported on the support block 26 (see FIG. 7) provided on the land, the moving device 10 deactivates the air ejection mechanism 10A and supports the base 10a. Is separated from the bottom of the hull S. When the hull S is transferred, the air ejection mechanism 10A extends the double-acting air cylinder of the main body 10f, floats the support base 10a to a predetermined height, supports the hull S with the support base 10a, and the air ejection pad 10g. By jetting pressurized air from the carrier road surface 7 to the wheel road 10d, the wheel load of the caster wheel 10d is reduced to zero, and the resistance when the moving device 10 supporting the hull S is moved with respect to the carrier road surface 7 is extremely small. can do. Therefore, the hull S is moved by pushing or towing using a moving jack device 34 (see FIG. 8) such as a push-pull gripper jack connected to the bracket 10e.

  As shown in FIG. 1, the first construction area 5 includes a first construction stage 20 for constructing a hull rear portion Sb arranged in parallel to the first conveyance path 4 on the left side of the first conveyance path 4, and a first conveyance path. 4 is a second construction stage 30 arranged in parallel to the first transport path 4 on the left side of 4 and in front of the first construction stage 20 (on the quay 2 side), and constructs the hull main part Sa and the rear part of the hull A second construction stage 30 for constructing the hull S by coupling Sb to the main hull part Sa, and a third construction for constructing the hull module Sm arranged on the opposite side of the second construction stage 30 across the first transport path 4. The construction stage 40, the second transport path 13 for moving the rear hull Sb from the first construction stage 20 to the second construction stage 30, and the ship body S in the width direction from the second construction stage 30 to the first transport path 4 Multiple thirds to move to Roads 14a to 14h, fourth transport paths 15a and 15b for moving the hull module Sm from the third construction stage 40 to the second construction stage 30, and transport paths 13, 14a to 14h, 15a and 15b, respectively. A plurality of moving devices 10, a hull rear portion Sb, a hull module Sm, a plurality of moving jack devices 34 for moving the hull S, and the like.

  As shown in FIGS. 6-8, the 1st construction stage 20 is a stage which builds the hull rear part Sb containing an engine room. The hull rear part Sb under construction is placed and supported on a number of support blocks 26 (see FIG. 7) consisting of a concrete block body and a material thick plate at the top. At the time of transferring the hull rear portion Sb to the second construction stage 30, for example, the four moving devices 10 are moved forward by the plurality of moving jack devices 34 in a state where the four places at the bottom of the hull rear portion Sb are supported. The first construction stage 20 is provided with a self-propelled crawler crane 21 and a transport vehicle 22 capable of transporting various equipment parts.

  The second transport path 13 of the first construction stage 20 is for moving the hull rear part Sb to the second construction stage 30 by the four moving devices 10 and extends linearly in parallel with the first transport path 4. ing. The second transport path 13 is provided with a pair of transport path surfaces 23 formed linearly on the left and right sides thereof, and is linearly provided along one transport path surface 23, and the moving device 10 is connected to the second construction stage. When moving to 30, a pair of guide rails 24 for guiding the moving device 10 and a straight line along the other conveyance path surface 23 and moving the moving device 10 to the second construction stage 30 Are provided with a pair of guide rails 25 that can guide the moving device 10. Two pairs of moving devices 10 and a pair of moving jack devices 34 are arranged on the pair of transporting road surfaces 23 so as to support four places at the bottom of the hull rear portion Sb.

  Each conveyance path surface 23 is comprised with the steel plate fixed on the concrete. The guide rails 24 and 25 are the same as the guide rails 8 and 9, and are erected on the conveyance path surface 23. Each moving device 10 is configured such that guide rollers 10 h on both the left and right sides thereof are guided by guide rails 24 and 25 on both the left and right sides and move along the conveyance path surface 23. The moving jack device 34 can push the moving device 10 while gripping the pair of guide rails 24 or 25.

  When the hull rear part Sb is moved from the first construction stage 20 to the second construction stage 30 in the direction of the ship's length (forward), a pair of moving jack devices 34 (see FIG. 8) is set on the pair of conveying road surfaces 23. Connected to a pair of mobile devices 10. Each moving device 10 extends the double-acting air cylinder in the main body portion 10f to raise the support base 10a to support the hull rear portion Sb, and applies pressurized air from the air ejection pad 10g to the conveyance path surface 23. Erupts. In this state, the rear part Sb of the hull is transferred to the second construction stage 30 by pushing each moving device 10 while gripping the pair of guide rails 24 or 25 with the gripper of each moving jack device 34. To do.

As shown in FIGS. 1 and 8 to 10, the second construction stage 30 is disposed on the forward extension line of the first construction stage 20, and constructs the main hull part Sa other than the hull rear part Sb and the hull rear part. A hull S is constructed by combining (merging) Sb and a main hull part Sa. The hull main part Sa, the hull S, and the hull module Sm under construction are supported by a plurality of support blocks (not shown) similar to the support block 26 shown in FIG.
The hull rear portion Sb is transferred from the first construction stage 20 to the second construction stage 30 on the four moving devices 10 arranged on the second transport path 13, and is supported on a plurality of support blocks in the second construction stage 30. Is done. After the transfer, the four moving devices 10 are returned to the first construction stage 20.

Eight third transport paths 14a to 14h are provided in the left-right direction for laterally moving the hull S almost completed in the second construction stage 30 from the second construction stage 30 to the first transport path 4 in the ship width direction, These third transport paths 14 a to 14 h intersect the first transport path 4. Note that the guide rails 8, 9, and 32 are divided at this intersection.
The third conveyance paths 14a to 14h are each provided with a conveyance path surface 33 made of a steel plate for moving the moving device 10, and each conveyance path surface 33 includes guide rails 8 and 9 erected on the conveyance path surface 7 and A similar pair of guide rails 32 is provided.

  Two third transport paths 14g and 14h are arranged in an area corresponding to the front part of the hull rear part Sb transferred to the second building stage 30 and an area on the right side thereof. The front end portion of the conveyance path surface 23 extending from the first construction stage 20 reaches the third conveyance path 14h. On the right extension of the two third transport paths 14c and 14e, fourth transport paths 15a and 15b for transporting the hull module Sm built on the third construction stage 40 to the second construction stage 30 are provided. Yes. The two third transport paths 14c and 14e are also used as part of the fourth transport path.

  In each of the third transport paths 14a to 14h, in order to move the hull S from the second construction stage 30 to the first transport path 4, two moving devices 10 are installed with their longitudinal directions directed in the front-rear direction. . The distance between these two moving devices 10 is set to be equal to the distance between the pair of conveyance path surfaces 7 of the first conveyance path 4, and after moving the hull S from the second construction stage 30 to the first conveyance path 4, The barge 50 is moved along the one transport path 4. In addition, as the moving devices of the third transport paths 14c and 14e, two moving devices 10 used for transferring the hull module Sm are shared. In each of the third transport paths 14a to 14h, a moving jack device 34 that generates a propulsive force for moving the hull S is disposed in the vicinity of the left side of the right moving device 10.

  When moving the hull S from the second construction stage 30 to the first transport path 4 in the ship width direction, each moving device 10 raises the support base 10a with the air cylinder of the main body portion 10f extended, and then the hull S. Is supported on the support table 10a, and pressurized air is ejected from the air ejection pad 10g to the conveyance path surface 33. On the other hand, in a state where the pair of guide rails 32 of the third transport paths 14a to 14h are gripped by the grippers of the respective moving jack apparatuses 34, the moving apparatus 10 is pushed rightward so that the moving apparatus 10 and the hull S are moved to the first position. Transfer to one transport path 4.

As shown in FIG. 8, the third construction stage 40 is a stage for constructing a hull module Sm that is a part of the hull main part Sa. The third construction stage 40 is disposed on the opposite side of the second construction stage 30 with the first conveyance path 4 interposed therebetween. When moving the hull module Sm to the second construction stage 30, the two moving devices 10 and the moving jack device 34 are set on the fourth conveying paths 15a and 15b, respectively, and the hull S is moved to the first conveying path 4. Do the same as moving.
Similar to the first construction stage 20, the third construction stage 40 is provided with a self-propelled crawler crane and a transport vehicle that can carry various outfitting parts.

  As shown in FIGS. 8 and 10, the fourth conveyance paths 15 a and 15 b are each provided with a conveyance path surface 43 made of a steel plate, and when the moving device 10 is transferred to the second construction stage 30 on the conveyance path surface 43. A pair of guide rails 42 that guide the moving device 10 are provided upright.

  As described above, the hull module Sm constructed at the third construction stage 40 is transferred to the second construction stage 30, and the main hull part Sa including the hull module Sm is constructed at the second construction stage 30. The hull rear part Sb constructed in the first construction stage 20 is transferred to the second construction stage 30 and the hull rear part Sb and the hull main part Sa are combined to construct the hull S. Thereafter, the hull S almost completed in the second construction stage 30 is transferred to the first transport path 4 by the plurality of moving devices 10 and the plurality of moving jack devices 34.

  Thereafter, the hull S is moved to the barge 50 along the first transfer path 4 by the plurality of moving jack devices 34 and the plurality of moving apparatuses 10 moving along the pair of transfer paths 7. The moving jack device 34 is configured to be able to grip a pair of guide rails 8, 9, 24, 25, and 32, and before transferring the hull S from the second construction stage 30 to the first transport path 4. Further, it is set in advance at the position shown by the chain line in FIG. After the hull S is transferred to the first transport path 4, the hull S is supported by the plurality of moving devices 10, and the moving device 10 is guided by the guide rails 8 and 9, while the plurality of moving jack devices 34. Transfer to barge 50 by thrust.

  As shown in FIG. 1 and FIG. 11, the marine barge 50 has a rectangular shape elongated in the front-rear direction, and is pierced to a barge pier 3 provided on the quay wall 2 with its longitudinal direction directed in the front-rear direction. It is fixed to the quay 2 by a rope 51. The barge 50 has a barge main body 50a, a plurality of ballast tanks 52 formed in the barge main body 50a, an engine and pumps and valves installed in the engine room, and pipes for pouring and draining. By adjusting the amount of ballast water in the tank 52, it is possible to switch between a floating state and a sinking state.

  The barge 50 includes a lattice beam 53 formed in the vicinity of the deck, a steel plate deck 54 formed on the upper surface of the lattice beam 53, and a pair of guides arranged linearly in the length direction of the barge 50. A rail 55, a pair of guide rails 56 that are linearly arranged in the length direction of the barge 50 and parallel to the guide rail 55, and a hull S that protrudes upward relative to the guide rails 55 and 56 are supported. The mounting table 57 and a number of support blocks for supporting the hull S transferred from the first transport path 4 are provided.

  The pair of guide rails 55 extends from the end of the quay 2 side to the opposite side on the upper surface of the deck 54. The ends of the pair of guide rails 55 on the side of the quay 2 are configured to be connectable to a pair of guide rails 8 extending to the tip of the barge contact pier 3. Similarly, the pair of guide rails 56 extends from the quayside 2 side end portion to the opposite end portion on the upper surface of the deck 54. The pier 2 end of the guide rail 56 is configured to be connectable to a pair of guide rails 9 extending to the tip of the barge pier 3.

  As described above, the hull S is transferred from the second construction stage 30 to the first transfer path 4 and transferred to the purge 50 along the first transfer path 4. At this time, the plurality of moving devices 10 that support the hull S are linearly guided by the guide rails 8 and 9 to the tip of the barge pier 3 and connected to the guide rails 8 and 9 at the tip of the barge pier 3. Guided by the guide rails 55 and 56, the deck 54 can be transferred. Therefore, the hull S can be linearly transferred to the tip of the barge berthing portion 3 in the ship length direction and transferred onto the barge 50 by the movement of the plurality of moving devices 10.

  When the plurality of moving devices 10 are transferred onto the barge 50, the hull S is transferred from the bow portion to the front in the direction of the captain, so that the unit acting on the barge 50 is compared with the case where the hull S is moved laterally in the width direction. The transfer load per moving distance can be reduced. Therefore, the transfer of the hull S to the barge 50 can be performed easily, stably and safely over time while keeping the pitching moment per unit moving distance acting on the barge 50 small.

  When the hull S is transferred onto the barge 50 by the moving device 10, the supply of pressurized air to the plurality of moving devices 10 is stopped, the air cylinders of these moving devices 10 are contracted, and the support 10a is lowered. The hull S is supported by the plurality of support blocks and the mounting table 57. Thereafter, since the moving device 10 and the moving jack device 35 have finished their roles, they are transferred to the land along the guide rails 55 and 56 and then transferred along the guide rails 8 and 9.

Next, although the construction method of the hull S is as described above, the construction method will be supplementarily described based on FIG. Si (i = 1, 2,...) Indicates each construction process.
First, in the hull rear part building process of S1, the hull rear part Sb is built in the first construction stage 20. In the hull main part construction process of S <b> 2, the hull main part Sa is built in the second construction stage 30. In the second construction stage 30, the hull main part Sa is constructed by combining the hull module Sm transferred from the third construction stage 40 and a part of the hull main part Sa previously built in the second construction stage 30. . Here, S1 and S2 correspond to a split construction process (first process).

  In the moving process of S3, the hull rear part Sb constructed in the first construction stage 20 is linearly transferred from the first construction stage 20 to the second construction stage 30 through the second transport path 13, and is transferred to the second construction stage 30. It is made to contact | abut to the rear-end part of a certain hull main part Sa. At this time, it is transferred to the second construction stage 30 by the four moving devices 10 and the two moving jack devices 34. Next, in the coupling / construction process (second process) of S4, the hull rear part Sb constructed in the first construction stage 20 and the hull main part Sa including the hull module Sm are coupled by welding in the second construction stage 30. Then, the construction work accompanying the coupling is performed to obtain the hull S.

  Next, in the lateral movement process of S5, a plurality of moving devices capable of moving the hull S that has been almost completed in the second construction stage 30 on the third conveyance paths 14a to 14h arranged orthogonal to the first conveyance path 4. 10 and a plurality of moving jack devices 34 are transferred to the first conveying path 4. In the second construction stage 30, the hull S constructed in the second construction stage 30 is parallel to the first conveyance path 4 in the ship length direction, and this hull S is transferred in the ship width direction and transferred to the first conveyance path 4. Therefore, on the first transport path 4, the ship length direction of the hull S coincides with the transport direction of the first transport path 4.

  In the longitudinal movement step (third step) of S6, the hull S transferred to the first conveyance path 4 is moved along the first conveyance path 4 by the plurality of movement devices 10 and the plurality of movement jack devices 34 in the ship length direction ( It is transferred linearly to the front) and transferred onto the barge 50 berthed at the barge berthing section 3 which is the end of the first transport path 4. At this time, since the hull S is linearly transferred in the direction of its length, the transfer load per unit moving distance acting on the barge 50 can be reduced during transfer onto the barge 50, and the barge 50 can be acted on. In a state where the pitching moment to be maintained is kept small, it can be transferred stably and safely over time.

  In the launching process of S7, the barge 50 on which the hull S is placed is pulled to a predetermined launching position where it can be launched by a tugboat and then stopped (see FIG. 13). At this launch position, seawater is injected into the ballast tank 52 to sink the barge 50. Then, as shown in FIG. 14, the bottom of the hull S is separated from the barge 50, and the hull S is levitated and thus the hull S can be launched. Thereafter, the settled barge 50 is resurfaced and towed by a tugboat.

Next, the operation and effect of the hull construction method will be described.
In this hull construction method, the hull S can be built in the horizontal construction yard 1 on land, and can be transferred onto the barge 50 and the hull S can be launched via the barge 50. Since it can be constructed without using it, it is advantageous in terms of equipment costs.

  The hull rear part Sb including the engine room and the hull main part Sa other than the hull rear part Sb are arranged in a straight line and divided, and then the hull rear part Sb is moved linearly toward the hull main part Sa to combine them. Therefore, the hull rear part Sb, which requires a longer construction period than the hull main part Sa, is constructed in two stages (places) to match the hull main part Sa (synchronously so as not to be delayed). Therefore, the construction period of the hull S can be shortened.

  Since the hull S is linearly moved in the direction of the ship along the first conveyance path 4 provided in the building yard and transferred onto the barge 50, the transfer distance to the barge 50 can be shortened. Since it is possible to transfer over time while maintaining a small pitching moment per unit moving distance acting on the barge 50, the transfer operation onto the barge 50 can be performed simply, stably and safely.

  By moving the hull rear part Sb linearly toward the second construction stage 30, the hull rear part Sb is united with the hull main part Sa, so there is no waste in moving the hull rear part Sb and it can be moved at low cost. it can. Since the hull S is completed or almost completed on land and then transferred onto the barge 50, the construction work for combining the hull rear part Sb with the hull main part Sa can be efficiently performed on land.

  Since the hull S is moved in the ship width direction before the vertical movement process and is provided with a horizontal movement process for moving the hull S onto the first conveyance path 4, the first conveyance path 4 is occupied while the hull S is being constructed. Since the first transport path 4 can be used for transferring another hull constructed separately in the second construction area 6, the construction work of the second and third construction stages 30 and 40 is also possible. Because the first transport path 4 is used as the traveling road surface of the three tower cranes for the purpose, the first transport path 4 can be used efficiently in a double and triple manner, and the equipment cost can be reduced. Can do.

Next, a modification in which the above embodiment is partially changed will be described.
1] The second construction area 6 in the above embodiment may be omitted, and in addition to the second construction area 6, a third construction area may be arranged rearward.

  2] The first and second construction stages 20 and 30 in the first construction area 5 and the third construction stage 40 in the second construction area 6 are arranged on one side of the first conveyance path 4, and the other side of the first conveyance path 4. It is also possible to arrange the third construction stage 40 in the first construction area 5 and the first and second construction stages 20 and 30 in the second construction area 6.

3] The third construction stage 40 may be omitted, and a construction area may be provided in which the first and second construction stages 20 and 30 are provided on one side of the first transport path 4.
4] The moving device 10 of the above embodiment shows an example, and the moving jack device also shows an example, and is not limited to these.

  5] In addition, those skilled in the art can implement the present invention by adding various modifications without departing from the spirit of the present invention, and the present invention includes such modifications. .

  The present invention divides the hull rear part and the hull main part on a straight line in a land construction yard without using a building dock, and divides the hull rear part linearly to merge with the hull main part. It can be applied to various hull construction methods in which the hull is moved in the direction of the ship, transferred onto a barge, and launched.

F hull building factory S hull Sa hull main part Sb hull rear part 1 building yard 4 first transfer path 5 first build area 6 second build area 10 moving device 13 second transfer paths 14a to 14h third transfer paths 15a, 15b 4 conveyance path 20 1st construction stage 30 2nd construction stage 40 3rd construction stage 50 Barge

Claims (3)

In the method of building a hull on land,
A first step of dividing and building a rear part of a hull including an engine room in a horizontal construction yard on land and arranging a main part of the hull other than the rear part of the hull in a straight line;
A second step of linearly moving the rear part of the hull toward the main part of the hull to unite and form a hull;
A third step of moving the hull linearly in the direction of the ship along the conveyance path provided in the building yard, and transferring it onto a barge in contact with the end of the conveyance path;
A hull construction method characterized by comprising:   2. The hull construction method according to claim 1, wherein after the second step and before the third step, the hull is moved in the width direction of the ship and moved onto the conveyance path. 3. The hull construction method according to claim 2, wherein after the third step, the barge is settled to launch the hull.