JP2018202965A - Welded structure - Google Patents

Abstract

To provide a welded structure excellent in an arrest characteristic.SOLUTION: A welded structure 10 comprises a first plate-like member 12, a second plate-like member 14 and an auxiliary member 16. In the state of abutting the first plate-like member 12 against the second plate-like member 14, an end part 12a of the first plate-like member 12, the second plate-like member 14 and the auxiliary member 16 are joined together by a weld metal part 22. The first plate-like member 12 includes plate members 20a and 20b and a weld metal part 18. The weld metal part 18 contacts with the second plate-like member 14. The auxiliary member 16 is provided so as to overlap with the weld metal part 18 viewing from a third direction Z. The outer peripheral surface of the auxiliary member 16 has a first non-welded region 24a not to be welded to the first plate-like member 12 and the second plate-like member 14.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a welded structure used in a container ship or the like.

  In a large container ship carrying a large amount of cargo, a large opening (hatch) for loading and unloading cargo is formed in the upper deck (upper deck). On the upper deck, hatch side combing is provided so as to surround the hatch in order to prevent the inflow of seawater. Each of the upper deck and the hatch side combing is configured by welding a plurality of steel plates. The hatch side combing is welded onto the upper deck.

  When such a large container ship sails on the sea, a load (vertical bending load) that bends the entire hull is applied to the hull by waves. In order to sufficiently ensure the strength (vertical bending strength) of the hull against such a load, a high-strength thick steel plate is used for the upper deck and the hatch side combing.

  Further, as described above, each of the hatch side combing and the upper deck has a configuration in which a plurality of steel plates are welded. In other words, the hatch side combing and the upper deck are formed with a plurality of welds for welding the steel plates together. Cracks generated in the welded portion are likely to propagate along the welded portion. For this reason, for example, when a crack occurs in the welded part of the hatch side combing, the crack may propagate toward the upper deck side along the welded part, and the propagated crack may propagate to the welded part of the upper deck. . Therefore, in order to sufficiently improve the strength of the hull, it is necessary that the hatch side combing and the upper deck have characteristics (arrest characteristics) that can stop the progress of cracks as described above.

  Therefore, conventionally, as described in Patent Document 1, the hatch side combing and the upper deck are welded so that the position of the welded portion of the hatch side combing and the position of the welded portion of the upper deck are shifted. According to this configuration, even if a crack generated in the hatch side combing propagates to the upper deck side along the welded portion of the hatch side combing, it is possible to suppress the propagated crack from progressing to the welded portion of the upper deck. If the base material of the upper deck has sufficient ares and characteristics to stop the brittle crack, the crack can be stopped in the upper deck, and safety can be ensured. Thereby, it is suppressed that a crack progresses from hatch side combing to an upper deck, and the intensity | strength of a hull can be improved.

JP 2012-092379 A

  By the way, as described above, the hatch side combing is welded to the upper deck. For this reason, even when the position of the welded portion is shifted between the hatch side combing and the upper deck, cracks propagated along the welded portion of the hatch side combing and the welded portion between the hatch side combing and the upper deck are transferred to the upper deck. May progress to For this reason, in order to further improve the strength of the hull, it is preferable to further improve the arrest characteristics of the welded structure used as hatch side combing and upper deck to suppress the above-described crack propagation.

  The present invention has been made to solve such a problem, and an object thereof is to provide a welded structure having excellent arrest characteristics.

  The gist of the present invention is the following welded structure.

(1) A welded structure including a first plate-like member, a second plate-like member, and an auxiliary member each made of metal,
In a state where the first plate-like member is abutted against the second plate-like member, an end portion of the first plate-like member on the second plate-like member side, the second plate-like member, and the auxiliary member Are joined together by a first weld metal portion extending in the first direction along the end portion of the first plate-shaped member,
At least one of the first plate-like member and the second plate-like member is arranged along the first direction and is extended by a second weld metal portion extending in a second direction intersecting the first direction. Including two plates joined together,
At least a part of the second weld metal portion is in contact with the other of the first plate member and the second plate member,
The auxiliary member is provided to overlap the second weld metal part when viewed from a third direction orthogonal to the first direction and the second direction,
In the cross section passing through the second weld metal portion of the cross section of the welded structure extending in the second direction and the third direction, the outer peripheral surface of the auxiliary member is the first from the position facing the first plate member. A welded structure including a first non-welded region that is provided continuously over a position facing two plate-like members and is not welded to the first plate-like member and the second plate-like member.

(2) A welded structure including a first plate-like member, a second plate-like member, and an auxiliary member each made of metal,
In a state where the first plate-like member is abutted against the second plate-like member, an end portion of the first plate-like member on the second plate-like member side, the second plate-like member, and the auxiliary member Are joined together by a first weld metal portion extending in the first direction along the end portion of the first plate-shaped member,
The second plate-like member includes two plate members that are arranged side by side in the first direction and joined to each other by a second weld metal portion that extends in a second direction intersecting the first direction,
The auxiliary member is provided to overlap the second weld metal part when viewed from a third direction orthogonal to the first direction and the second direction,
In the cross section passing through the second weld metal portion of the cross section of the welded structure extending in the second direction and the third direction, the outer peripheral surface of the auxiliary member is the first from the position facing the first plate member. A welded structure including a first non-welded region that is provided continuously over a position facing two plate-like members and is not welded to the first plate-like member and the second plate-like member.

(3) The first weld metal portion is provided on one side of the auxiliary member in the first direction, and the end portion on the one side of the auxiliary member is the first plate-like member and the second plate-like member. And welded to the first plate member and the second plate member at one end of the auxiliary member provided on the other side of the auxiliary member in the first direction. The welded structure according to (1) or (2), including the other side weld metal.

(4) The end portion of the first plate-like member has a notch portion so that the plate thickness of the first plate-like member becomes smaller as it approaches the second plate-like member,
The notch is formed to extend in the first direction at the end of the first plate member,
The one side weld metal and the other side weld metal are each provided in the notch,
The auxiliary member is joined to the first plate-like member and the second plate-like member by the one-side weld metal and the other-side weld metal in a state of being fitted in the notch portion (3 ) Welded structure.

(5) In the cross section passing through the second weld metal portion among the cross sections of the welded structure extending in the second direction and the third direction, the outer peripheral surface of the auxiliary member is the first plate-like member and The above (3) or (4) further including a second non-welded region that does not face any member of the second plate member and is not welded to the first plate member and the second plate member. ) Welded structure.

(6) In the plate thickness direction of the second plate-shaped member, when the side on which the second plate-shaped member is located with respect to the auxiliary member as a lower side and the opposite side as an upper side,
The first weld metal portion includes an upper weld metal extending in the first direction so as to join a portion above the second non-weld region and the first plate-like member on the outer peripheral surface of the auxiliary member, and Including at least one of lower weld metals extending in the first direction so as to join a portion below the second non-welding region and the second plate-like member on the outer peripheral surface of the auxiliary member; The welded structure according to (5) above.

(7) The first weld metal part includes the upper weld metal and the lower weld metal,
The welded structure according to (6), wherein the upper weld metal and the lower weld metal are connected to the one side weld metal and the other side weld metal, respectively.

(8) The auxiliary member has a first side surface facing one side in the first direction and a second side surface facing the other side in the first direction,
In the cross section of the first plate member and the auxiliary member extending in the plate thickness direction of the first plate member, the distance between the first side surface and the second side surface in the first direction is the first plate member. The first side surface is inclined toward the one side in the first direction and the second side surface is inclined toward the other side in the first direction so as to become larger as approaching to (1) to (7). One of the welded structures.

(9) The first plate-like member is hatch side combing,
The welded structure according to any one of (1) to (8), wherein the second plate-shaped member is an upper deck.

  According to the present invention, a welded structure having excellent arrest characteristics can be obtained.

FIG. 1 is a perspective view showing a welded structure according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view of the welded structure. FIG. 3 is a plan view showing the auxiliary member. FIG. 4 is a view showing the periphery of the auxiliary member. FIG. 5 is a perspective view showing a welded structure according to the second embodiment of the present invention. FIG. 6 is a cross-sectional view of the welded structure. FIG. 7 is a perspective view showing a welded structure according to a modification of the present invention. FIG. 8 is a cross-sectional view showing a welded structure according to another modification of the present invention. FIG. 9 is a view schematically showing a cross section of a container ship using a welded structure according to an embodiment of the present invention.

(Configuration of welded structure)
Hereinafter, a welded structure according to an embodiment of the present invention will be described. FIG. 1 is a perspective view showing a welded structure according to a first embodiment of the present invention.

  With reference to FIG. 1, a welded structure 10 according to the present embodiment includes a first plate member 12, a second plate member 14, and an auxiliary member 16. In the present embodiment, the welded structure 10 includes a pair of auxiliary members 16. Although details will be described later, in the present embodiment, the first plate member 12, the second plate member 14, and the auxiliary member 16 are joined in a state where the first plate member 12 is abutted against the second plate member 14. Has been.

  Note that, in FIG. 1 and FIGS. 2 to 4 described later, in order to clarify the positional relationship of each member, an X direction, a Y direction, and a Z direction orthogonal to each other are shown. In the present embodiment, the X direction corresponds to the first direction, the Y direction corresponds to the second direction, and the Z direction corresponds to the third direction. In the following description of the welded structure according to the present embodiment, the X direction is described as the first direction X, the Y direction is described as the second direction Y, and the Z direction is described as the third direction Z. Further, in the following description, in the plate thickness direction of the second plate member 14 (the second direction Y in the present embodiment), the side on which the second plate member 14 is positioned with respect to the auxiliary member 16 is defined as a lower side. The opposite side is the upper side.

Each of the first plate member 12, the second plate member 14, and the auxiliary member 16 is made of a metal material. The metal material used in the welded structure 10 according to the present embodiment is not particularly limited, and the welded structure 10 configured using various metal materials is preferably used in various structures that require arrest characteristics. it can. As described above, the material used in the welded structure 10 is not particularly limited, but as the material of the first plate member 12 and the second plate member 14, for example, a steel plate having a plate thickness of 50 mm or more is used. In some cases, a steel plate having a thickness of 80 mm or more may be used. The auxiliary member 16 is preferably collected from a steel plate having a Kca value (brittle crack propagation stop characteristic) at −10 ° C. of 6000 N / mm ^1.5 or more, for example.

  The first plate member 12 includes two plate members 20a and 20b. The plate members 20a and 20b are joined to each other by a weld metal portion 18 that is arranged side by side in the first direction X and extends in a direction intersecting the first direction X (second direction Y in the present embodiment). That is, in the present embodiment, the first plate-like member 12 includes plate members 20a and 20b and a weld metal portion 18 that joins the plate members 20a and 20b. In the present embodiment, the weld metal portion 18 is in contact with the upper surface 14 a of the second plate member 14. In the present embodiment, the weld metal portion 18 corresponds to the second weld metal portion.

  FIG. 2 is a cross-sectional view of the welded structure 10. FIG. 2 shows a cross section passing through the weld metal portion 18 among the cross sections of the welded structure 10 extending in the second direction Y and the third direction Z.

  Referring to FIGS. 1 and 2, the end 12 a of the first plate member 12 on the second plate member 14 side is such that the thickness of the first plate member 12 decreases as the end 12 a approaches the second plate member 14. It has the notch part 12b so that it may become. In this embodiment, the notch part 12b is provided in the one side and the other side of the 1st plate-shaped member 12 in the 3rd direction Z, respectively. Each notch 12 b is formed at the end 12 a of the first plate-like member 12 so as to extend in the first direction X.

  Referring to FIG. 2, auxiliary member 16 has a triangular shape in a cross section extending in second direction Y and third direction Z. Each of the pair of auxiliary members 16 is fitted into the notch 12b. In the present embodiment, one auxiliary member 16 is fitted into one notch portion 12b so that the end portion 12a is sandwiched from both sides in the third direction Z by the pair of auxiliary members 16, and the other auxiliary member 16 is the other. Is fitted into the notch 12b.

  In the present embodiment, in the cross section shown in FIG. 2, the auxiliary member 16 includes a first surface 16 a facing the first plate member 12, a second surface 16 b facing the second plate member 14, and the first plate member 12. And a third surface 16 c that does not face either of the second plate-like members 14.

  FIG. 3 is a plan view showing the auxiliary member 16. FIG. 4 is a view of the periphery of the auxiliary member 16 in the welded structure 10 as seen from the third direction Z. In addition, in FIG. 4, illustration of the weld metal part 22 mentioned later is abbreviate | omitted.

  Referring to FIGS. 3 and 4, auxiliary member 16 further has a first side surface 16 d facing one side in first direction X and a second side surface 16 e facing the other side in first direction X. . With reference to FIG. 3, in this embodiment, the first surface 16a and the second surface 16b each have a trapezoidal shape in plan view. With reference to FIG. 3 and FIG. 4, the third surface 16 c has a rectangular shape when viewed in a plan view or in the third direction Z. When viewed from the first direction X or the third direction Z, each of the first side surface 16d and the second side surface 16e has a triangular shape.

  In the present embodiment, in the cross section (not shown) of the first plate member 12 and the auxiliary member 16 extending in the plate thickness direction of the first plate member 12, the first direction between the first side surface 16d and the second side surface 16e. The first side surface 16d is inclined to one side in the first direction X and the second side surface 16e is inclined to the other side in the first direction X so that the distance in X increases as the distance from the first plate member 12 approaches. In the present embodiment, the distance between the first plate-like member 12 and the second plate-like member 14 in the first direction X increases as the distance approaches the lower end 12 c of the first plate-like member 12.

  Referring to FIG. 4, auxiliary member 16 is provided so as to overlap weld metal portion 18 when viewed in third direction Z. In the present embodiment, when viewed from the third direction Z, the auxiliary member 16 is disposed so that the weld metal portion 18 does not pass through one side and the other side in the first direction X with respect to the auxiliary member 16. In other words, when viewed from the third direction Z, the auxiliary member 16 protrudes from the weld metal portion 18 to one side and the other side in the first direction X.

  Referring to FIG. 1, the end 12 a of the first plate member 12, the second plate member 14, and the auxiliary member 16 are joined to each other by a weld metal portion 22 that extends in the first direction X. In the present embodiment, weld metal portions 22 are provided on one side and the other side of the first plate-like member 12 in the third direction Z, respectively. The weld metal part 22 is formed by, for example, arc welding. The weld metal part 22 contains, for example, 2% or more of Ni by mass%. In the present embodiment, the weld metal part 22 corresponds to the first weld metal part.

  In the present embodiment, each weld metal portion 22 includes one side weld metal 22a, the other side weld metal 22b, an upper side weld metal 22c, and a lower side weld metal 22d. In the following, one side weld metal 22a is referred to as weld metal 22a, the other side weld metal 22b is referred to as weld metal 22b, the upper weld metal 22c is referred to as weld metal 22c, and the lower weld metal 22d is referred to as weld metal 22d.

  The weld metal 22a and the weld metal 22b are each provided in the notch 12b. The weld metal 22a is provided on one side of the auxiliary member 16 in the first direction X, and the weld metal 22b is provided on the other side of the auxiliary member 16 in the first direction X.

  The auxiliary member 16 is joined to the first plate-like member 12 and the second plate-like member 14 by the weld metal 22a and the weld metal 22b while being fitted in the notch 12b. The end on the one side of the auxiliary member 16 is joined to the first plate-like member 12 and the second plate-like member 14 by a weld metal 22a, and the end on the other side of the auxiliary member 16 is joined by a weld metal 22b. The first plate member 12 and the second plate member 14 are joined.

  1 and 2, the weld metal 22 c extends in the first direction X so as to join the upper end portion of the auxiliary member 16 and the first plate-like member 12, and the weld metal 22 d is connected to the auxiliary member 16. It extends in the first direction X so as to join the lower end portion and the second plate-like member 14. In the present embodiment, the weld metal 22c joins the upper edge of the third surface 16c and the first plate member 12, and the weld metal 22d is the lower edge of the third surface 16c and the second plate member 14. And are joined. Referring to FIG. 1, weld metal 22c and weld metal 22d are connected to weld metal 22a and weld metal 22b, respectively.

  In the present embodiment, the outer peripheral surface of the auxiliary member 16 in the cross section shown in FIG. 2 includes a first non-welded area 24a and a second non-welded area 24b. The first non-welded region 24 a is continuously provided from a position facing the first plate member 12 to a position facing the second plate member 14, and the first plate member 12 and the second plate member 14. This is an area that is not welded. In the present embodiment, the first non-welded region 24a is provided on the first surface 16a and the second surface 16b.

  The second non-welded region 24b is a region that does not face the first plate member 12 and the second plate member 14 and is not welded to the first plate member 12 and the second plate member 14. is there. In the present embodiment, the second non-welded region 24b is provided between the weld metal 22c and the weld metal 22d on the third surface 16c.

(Effect of welded structure)
In the present embodiment, the auxiliary member 16 is provided so as to overlap the weld metal portion 18 when viewed from the third direction Z. Further, the outer peripheral surface of the auxiliary member 16 is continuously provided from a position facing the first plate member 12 to a position facing the second plate member 14, and the first plate member 12 and the second plate member. 14 has a first non-welded region 24a that is not welded. By providing the first non-welded region 24 a in this way, it is possible to prevent the crack generated in the weld metal portion 18 from progressing to the second plate member 14 or the auxiliary member 16 via the weld metal portion 22. it can. Thereby, progress of a crack can be stopped.

  Furthermore, in the present embodiment, a second non-welded region 24b is provided between the weld metal 22c and the weld metal 22d on the third surface 16c of the auxiliary member 16. Thereby, it can fully suppress that a crack progresses from the weld metal part 18 to the 2nd plate-shaped member 14 via the weld metal part 22 on the 3rd surface 16c of the auxiliary member 16. FIG.

  Moreover, in this embodiment, since the notch part 12b is provided in the edge part 12a of the 1st plate-shaped member 12, the contact area of the weld metal part 18 and the 2nd plate-shaped member 14 can be made small. Thereby, it can fully suppress that a crack progresses from the weld metal part 18 to the 2nd plate-shaped member 14. FIG.

  In the present embodiment, as described above, the first side surface 16d is inclined to one side in the first direction X, and the second side surface 16e is inclined to the other side in the first direction X. Thereby, when the weld metal 22a and the weld metal 22b are formed, the formation of a large gap between the weld metal 22a and the first side surface 16d and between the weld metal 22b and the second side surface 16e is suppressed. can do.

  Furthermore, in this embodiment, water enters between the auxiliary member 16 and the first plate-like member 12 and between the auxiliary member 16 and the second plate-like member 14 by the weld metal 22c and the weld metal 22d. Can be suppressed. Thereby, corrosion of the welded structure 10 can fully be suppressed. In the present embodiment, the weld metal 22c and the weld metal 22d are connected to the weld metal 22a and the weld metal 22b, respectively. Thereby, it can fully suppress that water enters between the auxiliary member 16 and the first plate-like member 12 and between the auxiliary member 16 and the second plate-like member 14.

  In the present embodiment, the length of the first non-welded region 24a in the first direction X is longer than the length of the weld metal portion 18 in the first direction X. Further, the gap between the first non-welded region 24a and the first plate-like member 12 and the gap between the first non-welded region 24a and the second plate-like member 14 are sufficiently small. Therefore, in the present embodiment, the gap formed between the auxiliary member 16 and the first plate member 12 and the second plate member 14 has a sufficiently small projected area when projected in the first direction X. Thereby, for example, even if a force in the first direction X acts on the welded structure 10, it is possible to sufficiently suppress the occurrence of fatigue failure starting from the gap.

(Second Embodiment)
Hereinafter, a welded structure according to a second embodiment of the present invention will be described. FIG. 5 is a perspective view showing a welded structure according to the second embodiment of the present invention. In the following description, the description of the portion having the same configuration as the above-described welded structure 10 will be omitted as appropriate, and the portion having a configuration different from the welded structure 10 will be mainly described.

  With reference to FIG. 5, the welded structure 30 according to the present embodiment includes a first plate member 32, a second plate member 34, and the above-described auxiliary member 16. In the present embodiment, the welded structure 30 includes a pair of auxiliary members 16. The first plate member 32, the second plate member 34, and the auxiliary member 16 are joined in a state where the first plate member 32 is abutted against the second plate member 34.

  In FIG. 5 and FIG. 6 described later, the X direction, the Y direction, and the Z direction orthogonal to each other are shown in order to clarify the positional relationship between the members. In the present embodiment, the X direction corresponds to the first direction, the Z direction corresponds to the second direction, and the Y direction corresponds to the third direction. In the following description of the welded structure according to the present embodiment, the X direction is described as the first direction X, the Z direction is described as the second direction Z, and the Y direction is described as the third direction Y. Further, in the following description, in the plate thickness direction of the second plate member 34 (the third direction Y in the present embodiment), the side on which the second plate member 34 is positioned with respect to the auxiliary member 16 is defined as a lower side. The opposite side is the upper side.

  As the 1st plate-shaped member 32 and the 2nd plate-shaped member 34, the metal material similar to the above-mentioned 1st plate-shaped member 12 and the 2nd plate-shaped member 14 can be used. In the present embodiment, the second plate member 34 includes two plate members 40a and 40b. The plate members 40a and 40b are joined to each other by a weld metal portion 36 that is arranged side by side in the first direction X and extends in a direction intersecting the first direction X (second direction Z in the present embodiment). That is, in this embodiment, the 2nd plate-shaped member 34 contains the board | plate materials 40a and 40b and the weld metal part 36 which joins plate | board materials 40a and 40b. In the present embodiment, the weld metal part 36 corresponds to the second weld metal part. In the present embodiment, the weld metal portion 36 may or may not be in contact with the first plate-like member 32.

  FIG. 6 is a cross-sectional view of the welded structure 30. FIG. 6 shows a cross section passing through the weld metal portion 36 among the cross sections of the welded structure 30 extending in the second direction Z and the third direction Y.

  Referring to FIGS. 5 and 6, the end portion 32a on the second plate-like member 34 side of the first plate-like member 32 has a notch portion 32b, similar to the above-described end portion 12a. In the present embodiment, the notches 32b are provided on one side and the other side of the first plate member 32 in the second direction Z, respectively. Each notch 32b is formed to extend in the first direction X at the end 32a.

  Referring to FIG. 6, one auxiliary member 16 is fitted into one notch portion 32 b so that the end portion 32 a is sandwiched from both sides in the second direction Z by the pair of auxiliary members 16, and the other auxiliary member 16. Is fitted into the other notch 32b.

  Also in the present embodiment, as in the above-described embodiment, in the cross section shown in FIG. 6, the auxiliary member 16 has the first surface 16 a facing the first plate member 32 and the second surface facing the second plate member 34. 16b, and a third surface 16c that does not face either the first plate member 32 or the second plate member 34.

  With reference to FIG. 5, in the present embodiment, the auxiliary member 16 is provided so as to overlap the weld metal portion 36 when viewed from the third direction Y. In the present embodiment, the auxiliary member 16 is disposed so that the weld metal portion 36 does not pass through one side and the other side in the first direction X as compared with the auxiliary member 16 when viewed from the third direction Y. In other words, when viewed from the third direction Y, the auxiliary member 16 protrudes from the weld metal portion 36 to one side and the other side in the first direction X.

  The end portion 32 a of the first plate member 32, the second plate member 34, and the auxiliary member 16 are joined to each other by a weld metal portion 22 that extends in the first direction X. In the present embodiment, the weld metal portions 22 are provided on one side and the other side of the first plate member 32 in the second direction Z, respectively. In the present embodiment, the weld metal part 22 corresponds to the first weld metal part.

  The weld metal part 22 has the same configuration as the weld metal part 22 of the welded structure 10, and has weld metals 22a, 22b, 22c, and 22d. Similarly to the weld metal part 22 of the welded structure 10, the weld metal 22a and the weld metal 22b are respectively provided in the notch part 32b. Although the detailed description is omitted, like the above-described welded structure 10, the auxiliary member 16 is fitted in the notch 32b and is welded by the weld metal 22 with the first plate member 32 and the second plate member. 34 is joined.

  Referring to FIG. 6, also in welded structure 30, as in welded structure 10 described above, the outer peripheral surface of auxiliary member 16 includes a first non-welded region 24 a and a second non-welded region 24 b.

(Effect of welded structure)
In the present embodiment, the auxiliary member 16 is provided so as to overlap the weld metal portion 36 when viewed from the third direction Y. Further, the outer peripheral surface of the auxiliary member 16 has a first non-welded region 24a. By providing the first non-welded region 24 a in this way, it is possible to prevent the crack generated in the weld metal portion 36 from progressing to the first plate member 32 or the auxiliary member 16 via the weld metal portion 22. it can. Thereby, progress of a crack can be stopped.

  Further, a second non-welded region 24 b is provided on the third surface 16 c of the auxiliary member 16. Thereby, it can fully suppress that a crack progresses from the weld metal part 36 to the 1st plate-shaped member 32 via the weld metal part 22 on the 3rd surface 16c of the auxiliary member 16. FIG.

  Moreover, since the notch part 32b is provided in the edge part 32a of the 1st plate-shaped member 32, the contact area of the weld metal part 36 and the 1st plate-shaped member 32 can be made small. Thereby, it can fully suppress that a crack progresses from the weld metal part 36 to the 1st plate-shaped member 32. FIG.

  Further, similarly to the welded structure 10 described above, large gaps are formed between the weld metal 22 a and the first side surface 16 d of the auxiliary member 16 and between the weld metal 22 b and the second side surface 16 e of the auxiliary member 16. This can be suppressed. Further, similarly to the above-described welded structure 10, the weld metal 22 c and the weld metal 22 d are used between the auxiliary member 16 and the first plate member 32 and between the auxiliary member 16 and the second plate member 34. Water can be prevented from entering.

  Also in the present embodiment, the gap formed between the auxiliary member 16 and the first plate-like member 32 and the second plate-like member 34 has a sufficiently small projection area when projected in the first direction X. . Thereby, for example, even if a force in the first direction X acts on the welded structure 30, it is possible to sufficiently suppress the occurrence of fatigue failure starting from the gap.

(Modification)
In the above-described embodiment, the case where the first plate-like member includes a plurality of plate members or the case where the second plate-like member includes a plurality of plate members has been described. For example, as illustrated in FIG. However, you may provide the 1st plate-shaped member 12 containing board | plate materials 20a and 20b, and the 2nd plate-like member 34 containing board | plate materials 40a and 40b. In this case, the auxiliary member 16 is provided with respect to the weld metal part 18 and the weld metal part 36, respectively. In addition, although detailed description is abbreviate | omitted, the 1st plate-shaped member may be provided with the 2 or more weld metal part, and the 3 or more plate material mutually joined by this weld metal part. Similarly, the 2nd plate-shaped member may be provided with two or more weld metal parts and three or more plate materials joined together by the weld metal parts.

  In the above-described embodiment, the case where the first plate-like member is provided with the notch has been described. However, for example, as illustrated in FIG. 8, the first plate-like members 12 and 32 do not have the notch. May be. Also in this case, the auxiliary member 26 may be provided at the boundary between the first plate-like members 12 and 32 and the second plate-like members 14 and 34 as in the above-described embodiment. Moreover, what is necessary is just to join the auxiliary member 26 to the 1st plate-shaped members 12 and 32 and the 2nd plate-shaped members 14 and 34 with the weld metals 22c and 22d similarly to the above-mentioned embodiment, for example.

  In addition, in the welded structure 10 shown in FIG. 2, one notch portion 12b is not formed, and a portion where the notch portion 12b is not formed may be fillet welded. Similarly, in the welded structure 30 shown in FIG. 6, a portion where one notch 32 b is not formed and the notch 32 b is not formed may be fillet welded. Also, since the notch portion is not formed and the fillet welded portion has better arrest characteristics than the portion welded to the notch portion, the notch portion is not formed and the fillet is welded. It does not prevent the auxiliary member from being provided at the welded portion.

  In the above-described embodiment, the second non-welded region 24b is provided on the third surface 16c of the auxiliary member 16, but the second non-welded region 24b may not be provided. For example, the entire surface of the third surface 16 c is not prevented from being covered with the weld metal portion 22. In order to further improve the arrest characteristic, it is preferable that the second non-welded region 24 b is provided on the third surface 16 c of the auxiliary member 16.

  In the above-described embodiment, the case where the first plate-like member and the second plate-like member are I-shaped butt welds has been described, but any groove shape such as a V shape or an X shape can be used.

(Use example of welded structure)
The welded structure according to the embodiment of the present invention is used in, for example, a container ship. FIG. 9 is a view schematically showing a cross section of a container ship using a welded structure according to an embodiment of the present invention.

  A container ship 60 shown in FIG. 9 includes a hatch side combing 62 and an upper deck 64. When the above-described welded structures 10, 30, 50 are used in the container ship 60, the first plate-like members 12, 32 are used as the hatch side combing 62, and the second plate-like members 14, 34 are the upper deck 64. Used as Thus, the strength of the hull of the container ship 60 can be improved by using the welded structures 10, 30, and 50 in the container ship 60.

  As described above, according to the present invention, a welded structure having excellent arrest characteristics can be obtained.

10, 30, 50 Welded structure 12, 32 First plate member 14, 34 Second plate member 16, 26 Auxiliary member 18, 22, 36 Weld metal part 24a First non-weld region 24b Second non-weld region 60 Container ship 62 Hatchside combing 64 Upper deck

Claims (9)

A welded structure including a first plate-like member, a second plate-like member, and an auxiliary member each made of metal,
In a state where the first plate-like member is abutted against the second plate-like member, an end portion of the first plate-like member on the second plate-like member side, the second plate-like member, and the auxiliary member Are joined together by a first weld metal portion extending in the first direction along the end portion of the first plate-shaped member,
At least one of the first plate-like member and the second plate-like member is arranged along the first direction and is extended by a second weld metal portion extending in a second direction intersecting the first direction. Including two plates joined together,
At least a part of the second weld metal portion is in contact with the other of the first plate member and the second plate member,
The auxiliary member is provided to overlap the second weld metal part when viewed from a third direction orthogonal to the first direction and the second direction,
In the cross section passing through the second weld metal portion of the cross section of the welded structure extending in the second direction and the third direction, the outer peripheral surface of the auxiliary member is the first from the position facing the first plate member. A welded structure including a first non-welded region that is provided continuously over a position facing two plate-like members and is not welded to the first plate-like member and the second plate-like member. A welded structure including a first plate-like member, a second plate-like member, and an auxiliary member each made of metal,
In a state where the first plate-like member is abutted against the second plate-like member, an end portion of the first plate-like member on the second plate-like member side, the second plate-like member, and the auxiliary member Are joined together by a first weld metal portion extending in the first direction along the end portion of the first plate-shaped member,
The second plate-like member includes two plate members that are arranged side by side in the first direction and joined to each other by a second weld metal portion that extends in a second direction intersecting the first direction,
The auxiliary member is provided to overlap the second weld metal part when viewed from a third direction orthogonal to the first direction and the second direction,
In the cross section passing through the second weld metal portion of the cross section of the welded structure extending in the second direction and the third direction, the outer peripheral surface of the auxiliary member is the first from the position facing the first plate member. A welded structure including a first non-welded region that is provided continuously over a position facing two plate-like members and is not welded to the first plate-like member and the second plate-like member.   The first weld metal portion is provided on one side of the auxiliary member in the first direction and joins the end portion on the one side of the auxiliary member to the first plate-like member and the second plate-like member. One side weld metal and the other side which is provided on the other side of the auxiliary member in the first direction and joins the end of the other side of the auxiliary member to the first plate member and the second plate member The welded structure according to claim 1 or 2, comprising a weld metal. The end portion of the first plate-like member has a notch portion so that the plate thickness of the first plate-like member becomes smaller as it approaches the second plate-like member,
The notch is formed to extend in the first direction at the end of the first plate member,
The one side weld metal and the other side weld metal are each provided in the notch,
The said auxiliary member is joined to the said 1st plate-shaped member and the said 2nd plate-shaped member by the said one side weld metal and the said other side weld metal in the state fitted by the said notch part. The welded structure according to 1.   In the cross section that passes through the second weld metal portion of the cross section of the welded structure that extends in the second direction and the third direction, the outer peripheral surface of the auxiliary member includes the first plate-shaped member and the second member. 5. The welded structure according to claim 3, further comprising a second non-welded region that is not opposed to any of the plate-like members and is not welded to the first plate-like member and the second plate-like member. body. In the plate thickness direction of the second plate-shaped member, when the side on which the second plate-shaped member is located with respect to the auxiliary member as the lower side, and the opposite side as the upper side,
The first weld metal portion includes an upper weld metal extending in the first direction so as to join a portion above the second non-weld region and the first plate-like member on the outer peripheral surface of the auxiliary member, and Including at least one of lower weld metals extending in the first direction so as to join a portion below the second non-welding region and the second plate-like member on the outer peripheral surface of the auxiliary member; The welded structure according to claim 5. The first weld metal part includes the upper weld metal and the lower weld metal,
The welded structure according to claim 6, wherein the upper weld metal and the lower weld metal are connected to the one side weld metal and the other side weld metal, respectively. The auxiliary member has a first side surface facing one side in the first direction and a second side surface facing the other side in the first direction;
In the cross section of the first plate member and the auxiliary member extending in the plate thickness direction of the first plate member, the distance between the first side surface and the second side surface in the first direction is the first plate member. The first side surface is inclined toward the one side in the first direction and the second side surface is inclined toward the other side in the first direction so that the first side surface becomes larger as approaching to. The welded structure described. The first plate-like member is hatch side combing,
The welded structure according to any one of claims 1 to 8, wherein the second plate-shaped member is an upper deck.

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