Corner post fasteners for Tier 1 containers on a container ship deck

Abstract

A corner post fixing device for a Tier 1 container on the deck of a container ship is disclosed. The corner post fixing device for a Tier 1 container on the deck of a container ship according to the present invention comprises: a beam-shaped support having one end fixed to a corner casting of a Tier 1 container and the other end fixed to the deck of the container ship; a corner post fixing means for fixing the beam-shaped support to the corner casting; and a deck fixing means for fixing the beam-shaped support to the deck of the container ship, wherein the corner casting located at the bottom of the corner post of the container is clamped to the deck of the container ship, so that the corner post becomes stronger against buckling under compressive force. According to the present invention, there is an advantage that the corner post can take on more bending moment when buckling, and consequently, the risk of container collapse can be reduced. In addition, the buckling strength of the corner post can be improved without interfering with the achievement of the original purpose of the cargo fixing method while continuing to use conventional cargo fixing methods using twist locks and lashing bars.

Description

Technology Field

[0001] The present invention relates to a container cargo securing device and method on a container ship deck, and more specifically, to a corner post securing device for a Tier 1 container on a container ship deck that can be used as an additional cargo securing solution to existing securing methods. Background Technology

[0002] As container ships grow larger enough to carry over 20,000 TEU, deck containers are stacked vertically up to 9 to 10 times. While high container stacks offer advantages in terms of operational efficiency, their structural weakness exposes cargo to various ship movement issues during voyages, such as rolling, pitching, or slamming. To transport cargo containers as safely as possible, deck containers are securely fastened to the deck using multiple lashing bars.

[0003] On the decks of such container ships, high container stacks pose a new risk of Tier 1 deck container collapse. This occurs at the starboard and port ends, where compressive forces—the cumulative sum of acceleration, the weight of the stacked containers, impact forces, and other external forces—play the greatest role.

[0004] FIG. 1 is a drawing showing containers stacked on the deck of a container ship, and FIG. 2 is a drawing showing the collapse of containers stacked on the deck of a container ship according to the prior art.

[0005] Referring to FIGS. 1 and 2, if any one of the four corner posts on a Tier 1 container (10) at the starboard or port end of a stack of containers on a container ship deck breaks and buckles, this causes the Tier 1 container to collapse and the entire container stack to collapse. The Tier 1 container (10) decisively supports the entire stack, and if one stack falls, adjacent container stacks in the same bay fall like dominoes.

[0006] According to current cargo securing methods, upper containers are joined to lower containers via four corner castings using a twist lock system. Tier 1 deck containers are joined to sockets built into the deck via another twist lock. Once joined via the twist lock, the rotating body of the twist lock is twisted to lock the joint between the upper and lower containers, or between the Tier 1 container and the deck socket. The twist joints withstand tensile, shear, or compressive forces generated as the container stacks move during navigation or while the containers are loaded at the port.

[0007] Twisting motion is smooth due to the tolerances allowed in the twist lock. Zero tolerances make container loading or unloading at ports a time-consuming operation. However, the tolerances of the twist lock allow container stacks to swing over a wider range during the rolling and pitching of the vessel while sailing. Therefore, it is necessary for lashing bars to secure the containers to the vessel, which can limit the range of movement of the container stacks to some extent.

[0008] However, conventional cargo securing methods using twist locks and lashing bars cannot mitigate the new risk of Tier 1 containers collapsing due to high stacks of containers on the deck.

[0009] Lashing bars have a disadvantage in mitigating these new risks because they provide additional compressive force when lashing containers on the deck. This has a negative impact on the new risks, which is exacerbated, especially when the lashing is excessively tight.

[0010] Twist locks have a disadvantage in the buckling strength of corner posts because they do not secure the corner posts of a container to the ground due to tolerances. To address the risk of container collapse, corner posts require stronger buckling strength to resist the compressive force applied to them. It is widely known in the field of material strength that clamping joints are stronger for buckling posts. However, conventional twisting joints do not function as clamping joints.

[0011] Some previous studies have proposed clamped twisting joints by inserting screws into the body. While this design can help reduce tolerances to zero and keep the range of motion constant, it cannot function as a clamping joint. Furthermore, it is not certain as an effective solution to the new risk of container collapse.

[0012] Choosing a safe route helps mitigate new risks, but there are limitations due to the uncertain natural phenomena of rough weather. Prior art literature

[0013] International Publication No. WO 2012 / 034918 Republic of Korea Registered Patent No. 1517404 Republic of Korea Registered Patent No. 0768357 The problem to be solved

[0014] The present invention has been devised in consideration of the aforementioned problems, and its purpose is to provide a fixing device and fixing method for the corner posts of Tier 1 containers on the deck of a container ship, recognizing that increasing the buckling strength of the corner posts of Tier 1 deck containers is key to mitigating the new risk of container collapse. means of solving the problem

[0015] The corner post fixing device for a Tier 1 container on a container ship deck according to the present invention for solving the above problem comprises: a beam-shaped support having one end fixed to a corner casting of a Tier 1 container and the other end fixed to the deck of a container ship; a corner post fixing means for fixing the beam-shaped support to the corner casting; and a deck fixing means for fixing the beam-shaped support to the deck of a container ship, wherein the corner casting located at the bottom of the corner post of the container is clamped to the deck of the container ship, so that the corner post becomes more resistant to buckling under compressive force.

[0016] In the present invention, the corner post fixing means may include a corner post coupling plate that is bent from one end of the beam-shaped support downward and has a side coupling hole formed in the center; an end plate that is inserted into the elongated hole of the corner casting and twisted to be fixed, and a protruding bolt that extends from the center of the end plate, is inserted into the side coupling hole of the corner post coupling plate, and is fixed with a nut.

[0017] In the present invention, the deck fixing means may include: a deck socket installed on the deck of the container ship and having a housing having a cavity inside and an elongated socket hole connected to the cavity inside at the top; a socket coupling plate having upper and lower coupling holes formed at the other end of the beam-shaped support; an end plate inserted into the socket hole of the deck socket and twisted to be fixed, and a protruding bolt extending from the center of the end plate and inserted into the upper and lower coupling holes of the socket coupling plate and fixed with a nut.

[0018] In the present invention, another deck fixing means may include: a pad eye installed on the deck of the container ship and having a protruding plate extending from the deck and a through hole penetrating the protruding plate; a pad eye coupling plate having a front and rear coupling hole formed at the other end of the beam-shaped support; and a bolt and a nut fastened by penetrating the through hole of the pad eye and the front and rear coupling hole of the pad eye coupling plate.

[0019] In the present invention, the cross-section of the beam-shaped support may be any one of an I-shape, a T-shape, or a rectangular shape.

[0020] The present invention provides an apparatus and method for achieving a clamping joint connecting a corner post of a container and a deck socket installed on the deck of a Tier 1 deck container.

[0021] First, for example, a streetlamp pole is planted deep into the ground like a stake or has a bracket-shaped base at the bottom of the pole. This allows the post to remain standing even under external forces that would cause it to fall or bend. In this way, the clamping joint can withstand the bending moment that occurs when the post is bent or crushed by some external force.

[0022] Since the present invention does not allow for options such as the pile driving exemplified above due to the ship's structural limitations, other options using the aforementioned support can be selected. This method involves positioning one end of a beam-shaped support on a corner casting using bolts and nuts and attaching it to the lower end of the corner post. The other end of the beam-shaped support is secured to a deck socket using bolts and nuts, which may be installed on a deck to support 20ft containers. As exemplified by the support of a street lamp, the beam-shaped support helps the corner post resist external forces such as bending. That is, due to the beam-shaped support extending from the corner post, the corner post can resist a larger bending moment.

[0023] Although the present invention is primarily intended for the most commonly used container size, the 40ft container, the apparatus and method of the present invention may be applied to other sizes. When applied to a 40ft container, an extra socket used to mount a Tier 1 20ft container is located on the deck.

[0024] It was previously explained that conventional lashing bars do not help to handle compressive forces applied to corner posts. In the case of conventional twist locks, they are designed to withstand tensile and shear forces during rolling or pitching of a ship, but due to their shape and tolerances, they have limitations in accommodating the bending moment that occurs when a corner post buckles.

[0025] Therefore, the present invention has the advantage of being able to take on more bending moment when the corner post is buckled, and consequently can reduce the risk of container collapse.

[0026] The present invention can be applied as an additional solution to conventional cargo securing methods and practices, and the likelihood of the present invention interfering with conventional securing methods is significantly low.

[0027] The present invention will withstand tension until it reaches the allowable limit of the tolerance of the twist lock, and most of the tension generated in the joint when the container stack shakes due to the rolling and pitching of the ship is withstood by the twist lock.

[0028] The present invention may be optionally applied to the weakest Tier 1 deck container of a container ship or the weakest corner post of a container.

[0029] The present invention can be applied mainly to 40ft containers. Effects of the invention

[0030] According to the present invention having the configuration described above, there is an advantage that the corner post can take on more bending moment when buckling, and consequently, the risk of container collapse can be reduced.

[0031] In addition, the buckling strength of the corner post can be improved while continuing to use the conventional cargo securing method using twist locks and lashing bars without interfering with the achievement of the original purpose of the cargo securing method. Brief explanation of the drawing

[0032] FIG. 1 is a drawing showing containers stacked on a container deck according to the prior art. FIG. 2 is a drawing showing the collapse of containers stacked on a container deck according to the prior art. FIG. 3 is an exploded perspective view showing a corner post fixing device using a beam-shaped support that accepts a bending moment generated by the buckling of a Tier 1 container corner post according to the first embodiment of the present invention. FIG. 4 is a drawing showing a corner post fixing device fixed to a corner casting of a container according to a first embodiment of the present invention. FIG. 5 is a drawing showing a socket fixing device fixed to an extra socket of a container ship deck according to the first embodiment of the present invention. FIG. 6 is a drawing showing the assembled state of a corner post and a socket of a container using a corner post fixing device of a container according to the first embodiment of the present invention. FIG. 7 is an exploded perspective view showing a corner post fixing device for a container using a beam-shaped support that accepts a bending moment generated by the buckling of a Tier 1 container corner post according to a second embodiment of the present invention. FIG. 8 is a drawing showing the assembly state of a corner post and a pad eye of a container using a corner post fixing device of a container according to a second embodiment of the present invention. Specific details for implementing the invention

[0033] Hereinafter, a corner post fixing device for a container according to a preferred embodiment of the present invention will be described in detail with reference to the attached drawings.

[0034] The present invention can be used without interference when cargo is secured using conventional twist locks and lashing bars.

[0035] First, the present invention applies to all weak containers and selected corner posts.

[0036] Generally, the present invention applies to Tier 1 deck containers located near the starboard and port ends of a vessel, where acceleration is high. However, it may also be applied to containers in other locations, as they may collapse first due to inherent container damage, incorrect loading weight, etc.

[0037] FIG. 3 is an exploded perspective view showing a corner post fixing device using a beam-shaped support that accepts a bending moment generated by the buckling of a Tier 1 container corner post according to the first embodiment of the present invention.

[0038] Referring to FIG. 3, the corner post fixing device (100) includes a beam-shaped support (110), a corner post fixing member (120) coupled to one end of the support (110), a socket fixing member (130) coupled to the other end of the beam-shaped support (110), and a deck socket (140) coupled to the socket fixing member (130).

[0039] The beam-shaped support (110) comprises a body (111) extending in the longitudinal direction, a corner post coupling plate (113) that is bent downward from one end of the body (111) and has a side coupling hole (117) formed in the center, and a socket coupling plate (115) that has an upper and lower coupling hole (119) formed at the other end of the body (111). The cross-section of the beam-shaped support (110) may be any one of an I-shape, a T-shape, or a rectangular shape. Additionally, the beam-shaped support (110) may be formed with a downward slant from the upper part of the corner post coupling plate (113) toward the socket coupling plate (115).

[0040] The corner post fixing member (120) and socket fixing member (130) each consist of an end plate (121, 131) and a protruding bolt (123, 133) extending from the central part of the end plate (121, 131).

[0041] The above deck socket (140) is installed on the deck of a container ship and has a housing (141) having a cavity inside and an elongated socket hole (143) connected to the cavity inside at the top.

[0042] FIG. 4 is a drawing showing an end plate of a corner post fixing device fixed to a corner casting of a container according to the first embodiment of the present invention.

[0043] Referring to FIG. 4, the corner post direction end plate (121) can be inserted longitudinally into the elongated hole (311) of the corner casting (310) at the bottom of the corner post (20) of the container and, when twisted, can be fixed to the elongated hole (311).

[0044] The lower part of the corner casting (310) of the above container is locked vertically by a socket (313) on the deck of the container ship and a twist lock (400). The corner post fixing device (100) of the present invention can be used without interference with the vertical fixing of the conventional twist lock (400).

[0045] FIG. 5 is a drawing showing a socket fixing device fixed to an extra socket of a container ship deck according to the first embodiment of the present invention.

[0046] Referring to FIG. 5, the socket direction end plate (131) can be fixed to the deck socket (140) by being inserted longitudinally into the deck hole (143) of the deck socket (140) formed on the deck of the container and then twisted. The deck socket (140) may be formed separately on the deck, or a general-purpose 20ft deck socket already formed on the deck may be used.

[0047] FIG. 6 is a drawing showing the assembled state of a corner post and a deck socket of a container using a corner post fixing device of a container according to the first embodiment of the present invention.

[0048] Referring to FIG. 6, the corner post fixing device (100) has a post fixing member (120) that is coupled to one end of a beam-shaped support (110) and is fixed to a corner casting (310) located at the bottom of a corner post (20) of a Tier 1 container (10), and a deck fixing member (130) that is coupled to the other end of a beam-shaped support (110) is fixed to a deck socket (140) formed on the deck of the container.

[0049] The present invention uses a device called a beam-shaped support (110), wherein one end of the beam-shaped support (110) is mounted on a corner casting (310) and the other end of the beam-shaped support (110) is mounted on a deck socket (140) installed on the deck, and the beam-shaped support (110) is extended to have a structure capable of resisting the bending moment generated when the corner post (20) is buckled by accumulated compressive force.

[0050] The corner post fixing device (100) of the present invention accepts a portion of the tensile force applied in the axial direction of the corner post, up to a level where the tolerance of the twist lock (400) is permissible. Consequently, the twist lock (400) accepts most of the intended tensile force.

[0051] The number of bolt and nut sets used in the post fixing member (120) and socket fixing member (130) of the present invention is shown as only one, but can be increased as needed.

[0052] The installation and removal of the corner post fixing device (100) on the corner post (20) according to the first embodiment are as follows.

[0053] Referring to FIGS. 3 to 6, the end plate (121) of the post fixing member (120) is connected to the corner casting (210) at the bottom of the corner post (20), and the protruding bolt (123) is fixed to the corner post connecting plate (113) at one end of the beam-shaped support (100) with a nut (125) but is not yet tightened.

[0054] The socket direction end plate (131) of the socket fixture (130) is connected to the deck socket (140) for the 20ft container, and the protruding bolt (133) is fixed to the socket coupling plate (115) of the other end of the beam-shaped support (100) with a nut (135) but is not yet tightened.

[0055] First, the corner post direction end plate (121) and the corner post coupling plate (213) are fastened at one end of the beam-shaped support (110) using a protruding bolt (123) and a nut (125). Here, it is checked whether the end plate (121) of the corner post fixing member (100) is completely fixed inside the elongated hole (311) of the corner casting (310).

[0056] Next, the socket direction end plate (131) and the socket coupling plate (115) at the other end of the beam-shaped support (110) are fastened to the deck socket (140) using protruding bolts (133) and nuts (135).

[0057] After the fixing of one corner post (20) is completed, move to the next corner post (20) and repeat the process of attaching the post fixing device (100) as described above.

[0058] The corner post (20) in the Tier 1 deck container (10) can be fixed to the deck using four corner post fasteners (100).

[0059] Alternatively, the corner posts (20) may be optionally fixed, for example, by using two corner post fixing devices (100) to fix only two corner posts (20) at the front or rear end of the container.

[0060] The separation of the corner post fixing device (100) from the corner post (20) proceeds in reverse order.

[0061] First, the socket coupling plate (115) and the socket direction end plate (113) are separated from the deck socket (140), and then the corner post coupling plate (113) and the post direction end plate (121) are separated from the corner casting (310).

[0062] For storage, the corner post fixing device (120) and the deck fixing device (130) are collected and reassembled onto the beam-shaped support (110) so that the parts are not lost and the fixing devices do not fall off and get lost when lifting for container unloading.

[0063] After the separation of the post fixing device (100) from the corner post (20) is completely finished, the routine unlocking process of the existing cargo fixing tool, the twist lock (400) and lashing bar, can be started.

[0064] The present invention can be applied to the weakest container on a container ship or to the weakest corner post (20) in a container according to calculation, or to a challenging sailing route against rough weather or a sailing with an extremely high stack containing a significant weight.

[0065] FIG. 7 is an exploded perspective view showing a corner post fixing device for a container using a beam-shaped support that accepts a bending moment generated by the buckling of a Tier 1 container corner post according to a second embodiment of the present invention.

[0066] Referring to FIG. 7, the corner post fixing device (200) includes a beam-shaped support (210), a corner post fixing member (220), and a pad eye (230).

[0067] The beam-shaped support (210) comprises a body (211) extending in the longitudinal direction, a corner post coupling plate (213) that is bent downward from one end of the body (211) and has a side coupling hole (217) formed in the center, and a pad eye coupling plate (215) that has a front and rear coupling hole (219) formed at the other end of the body (211).

[0068] The corner post fixing member (220) is composed of an end plate (221) and a protruding bolt (223) extending from the central portion of the end plate (121), identical to the first embodiment. The protruding bolt (223) is screw-fastened with a nut (225).

[0069] The above pad eye (230) is fixed on the deck of a container ship and has a protruding plate (231) extending from the deck, and is composed of a through hole (233) that penetrates the extended protruding plate (231).

[0070] FIG. 8 is a drawing showing the assembly state of a corner post and a pad eye of a container using a corner post fixing device of a container according to a second embodiment of the present invention.

[0071] Referring to FIGS. 7 and 8, the corner post fixing device (200) is a corner post fixing member (220) that is coupled to a corner post coupling plate (213) at one end of a beam-shaped support (210), and is fixed to a corner casting (310) located at the bottom of a corner post (20) of a Tier 1 container (10). This is the same as in the first embodiment.

[0072] Meanwhile, the pad-eye coupling plate (215) at the other end of the beam-shaped support (210) is made to come into contact with the pad-eye (230), and the through hole (233) of the pad-eye (230) and the front and rear coupling hole (217) of the pad-eye coupling plate (215) are fastened with a bolt (240) and a nut (241).

[0073] The pad eye (230) in the drawing is formed in a direction parallel to the beam-shaped support (210). Alternatively, it may have a direction perpendicular to the beam-shaped support (210), in which case the pad eye coupling plate of the beam-shaped support will have a shape bent downwards similar to a corner post coupling plate, unlike in the drawing.

[0074] The invention described above is not limited by the drawings and detailed description, and it is understood that various modifications and changes made by those skilled in the art within the scope and spirit of the invention as set forth in the following claims are also included within the scope of the invention. Explanation of the symbols

[0075] 10: Container 20: Corner post 100, 200: Corner post fixing device 110, 210: Beam-shaped support 111, 211: Body 113, 213: Post connecting plate 115: Socket coupling plate 117, 217: Side coupling holes 119: Upper and lower connecting hole 120, 220: Post fastener 121, 131, 221: End plates 123, 133, 223: Protruding bolts 125, 135: Nut 130: Socket fastener 140: Deck socket 141: Housing 143: Socket hole 215: Pad-eye coupling plate 219: Front and rear connection hole 230: Pad eye 231: Protruding plate 233: Through hole 240: Bolt 241: Nut 310: Corner Casting 311: Jang Gong 313: Socket 400; Twist lock

Claims

Claim 1 A beam-shaped support having one end fixed to a corner casting of a Tier 1 container and the other end fixed to the deck of a container ship; a corner post fixing means for fixing the beam-shaped support to the corner casting; and a deck fixing means for fixing the beam-shaped support to the deck of a container ship, wherein the deck fixing means comprises: a deck socket having a housing installed on the deck of the container ship and having a cavity inside, and an elongated socket hole connected to the cavity inside at the top; and a socket coupling plate having upper and lower coupling holes formed at the other end of the beam-shaped support. A corner post fixing device for a Tier 1 container on the deck of a container ship, characterized by including a socket fixing device comprising an end plate that is inserted into the socket hole of the deck socket and twisted to fix, and a protruding bolt that extends from the central part of the end plate and is inserted into the upper and lower coupling holes of the socket coupling plate and fixed with a nut, thereby clamping a corner casting located at the bottom of the corner post of the container to the deck of the container ship, so that the corner post becomes more resistant to buckling under compressive force. Claim 2 A corner post fixing device for a Tier 1 container on a container ship deck, characterized in that, in claim 1, the corner post fixing means comprises: a corner post coupling plate that is bent downward from one end of the beam-shaped support and has a side coupling hole formed in the center; an end plate that is inserted into the elongated hole of the corner casting and twisted to be fixed, and a protruding bolt that extends from the center of the end plate and is inserted into the side coupling hole of the corner post coupling plate and fixed with a nut. Claim 3 delete Claim 4 A corner post fixing device for a Tier 1 container on the deck of a container ship, comprising: a beam-shaped support having one end fixed to the corner casting of a Tier 1 container and the other end fixed to the deck of a container ship; a corner post fixing means for fixing the beam-shaped support to the corner casting; and a deck fixing means for fixing the beam-shaped support to the deck of a container ship, wherein the deck fixing means comprises: a pad eye installed on the deck of the container ship and having a protruding plate extending from the deck and a through hole penetrating the protruding plate; a pad eye coupling plate having a front-rear coupling hole formed at the other end of the beam-shaped support; and a bolt and nut fastened by penetrating the through hole of the pad eye and the front-rear coupling hole of the pad eye coupling plate, thereby clamping the corner casting located at the bottom of the corner post of the container to the deck of the container ship, so that the corner post becomes more resistant to buckling under compressive force. Claim 5 A corner post fixing device for a Tier 1 container on a container ship deck, characterized in that, in claim 1, the cross-section of the beam-shaped support is one of an I-shape, a T-shape, or a rectangular shape.

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