JP5970692B2 - Method for joining members, method for manufacturing freight transport vehicle, and method for manufacturing freight transport container - Google Patents

Description

The present invention relates to a method for producing a bonded how and manufacturing method of the freight transportation vehicles and freight containers members.

  For example, Patent Document 1 discloses a configuration in which a large planar structure is formed by connecting a main beam and a planar plate material in the width direction as a floor structure of a trailer. According to this floor structure, the flooring can be thinned, and the weight of the vehicle body can be reduced. By the way, in Patent Document 1, the main beam and the plate material are fixed by welding, but an error may occur in the vehicle body width due to thermal deformation at the time of welding and tolerance of the main beam or plate material. .

  Therefore, as shown in Patent Document 2, a width adjusting plate having an adjustment margin in the width direction of the floor is provided on one floor constituent material among two adjacent floor constituent materials (plate material or main beam), and the other A structure has been developed in which a floor plate is provided with a joint plate joined to a width adjusting plate by one-side fillet welding. According to such a configuration, a floor structure having a highly accurate vehicle body width can be manufactured.

JP2011-183991A JP 2012-11795 A

  However, in the conventional floor structure, when the upper and lower surfaces of the floor constituent material are welded, heat distortion occurs due to the heat input of the welding, so that there is a possibility that unevenness occurs at the joint portion of the floor constituent material. . This is considered to be due to the following phenomenon. In other words, during welding, the welded surface tends to shrink due to heat and the surface opposite to the welded surface tends to open, but when welding the second surface, Since the surfaces (first surface) are welded and constrained, the opening of the joint surface of the second surface generated by the welding of the first surface cannot be completely returned, and irregularities are generated.

The present invention was devised to solve the above problems, with resulting high dimensional accuracy, and aims to provide a bonding how the member that ensures flatness between members To do. It is another object of the present invention to provide a method for manufacturing a freight carrying vehicle and a method for producing a freight carrying container formed by using the above-described member joining method .

The invention according to claim 1 for solving the above-mentioned problem is that the plate portions are formed on both sides and formed into a hollow surface , and one of the plate portions is a thin plate portion, and the other plate portion. Is a joining method in which the first member and the second member, which are thicker plate portions than the thin plate portion, are joined along the surface direction and joined by welding, and formed at the end of the first member. The abutting step of abutting the end of the second member on the bottom of the recessed portion, and welding the thin plate portions of one surface of the both surfaces, and then welding the thick plate portions of the other surface And a welding process. A member joining method comprising: a welding step;

According to such a method, even if the welded portion shrinks due to heat input by welding and the end of the second member tries to enter the back of the recess, the end is abutted against the bottom of the recess from the beginning, Since the end portion does not enter further, deformation can be suppressed. Therefore, the opening of the surface opposite to the welded surface can also be suppressed (the opening can be reduced), and the opening can be restored when the opposite surface is welded. Accordingly, it is possible to secure flatness by suppressing the uneven deformation of the joint portion. Furthermore, the positional relationship between the first member and the second member is restricted by the end portion of the second member coming into contact with the bottom of the recess, and high dimensional accuracy can be obtained. Furthermore, there is a tendency that the surface opposite to the welded surface tends to open at the time of welding. However, if the thick plate portions are welded first, the thin plate portions are opened too much and the thin plate portions are welded together. The opening may not return completely. According to this joining method, since the thin plate portions are welded first and the thick plate portions are welded later, the amount of heat input at the time of welding on the second surface increases, and as a result, the opening can be reliably returned. it can. Therefore, the flatness can be ensured by suppressing the uneven deformation of the joint.

The invention according to claim 2 is characterized in that, in the abutting step, a spacer is provided at the bottom of the recess, and an end of the second member is abutted against the spacer.

  According to such a method, the dimension of the whole joined member can be adjusted by changing the thickness of the spacer.

The invention according to claim 3 is characterized in that the spacer has a thickness set according to a dimensional error of the first member and the second member.

  According to such a method, the dimensional error of the first member itself and the second member itself can be absorbed, and the dimensional accuracy of the entire joined member can be further enhanced.

The invention according to claim 4 has plate portions on both sides and is formed into a hollow surface, and one of the plate portions is a thin plate portion, and the other plate portion is thicker than the thin plate portion. A method of manufacturing a cargo carrying vehicle having a floor portion formed by joining a first member and a second member, which are thick plate portions, along a surface direction and joining them by welding, wherein the floor portion is The forming step includes abutting step of abutting the end portion of the second member against the bottom of the concave portion formed at the end portion of the first member, and welding the thin plate portions on one side of the both surfaces. And a welding step of welding the thick plate portions on the other surface to each other .

The invention according to claim 5 has a plate part on both sides and is formed into a hollow surface, and one of the plate parts is a thin plate part, and the other plate part is thicker than the thin plate part. A method for manufacturing a cargo carrying container having a floor portion formed by joining a first member and a second member, which are thick plate portions, along a surface direction and joining them by welding, wherein the floor portion is The forming step includes abutting step of abutting the end portion of the second member against the bottom of the concave portion formed at the end portion of the first member, and welding the thin plate portions on one side of the both surfaces. And a welding step of welding the thick plate portions on the other surface to each other .

  Cargo transportation vehicles include trailers and trucks. According to such a structure, a floor portion of a freight carrying vehicle or a freight carrying container with high dimensional accuracy can be formed. Therefore, a freight carrying vehicle or a freight carrying container having a large floor area on the loading surface within a specified dimension can be formed. Can be obtained.

  According to the present invention, it is possible to obtain an excellent effect of obtaining high dimensional accuracy and ensuring flatness between members.

It is the bottom view which showed the floor part of the vehicle for cargo transportation which concerns on embodiment of this invention. It is sectional drawing which showed the floor part of the vehicle for cargo transportation which concerns on embodiment of this invention. (A) And (b) is a principal part enlarged view for demonstrating the joining method of the member which concerns on embodiment of this invention. It is the perspective view which showed the joining structure of the member which concerns on embodiment of this invention. It is the principal part enlarged view which showed the joining structure of the member which concerns on other embodiment of this invention. It is the figure which showed the joining structure of the member which concerns on other embodiment of this invention, Comprising: (a) is a principal part enlarged view, (b) is a perspective view of the flooring which has a protruding item | line. (A), (b) is the perspective view which showed the joining structure of the member which concerns on other embodiment of this invention.

  Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings. In the present embodiment, the joining structure of the members will be described by taking the floor portion of the trailer as an example.

  As shown in FIG. 2, the member joining structure 3 according to the present embodiment is applied as a structure for joining members of the floor portion 2 of the trailer 1 pulled by a tractor (not shown). As shown in FIGS. 1 and 2, the floor portion 2 includes a pair of main beams 10 and 10 extending in the length direction (vehicle length direction) of the trailer 1 and a plurality of floor materials extending in the length direction. 30, 30... And the floor part 2 which is a planar structure is comprised by connecting main beam 10,10 and flooring 30,30 ... in the width direction (vehicle width direction) of the trailer 1. As shown in FIG. In the present embodiment, a pair of main beams 10 are provided at intervals in the vehicle width direction, but the number of main beams is not limited to this, and may be one, for example. Three or more may be sufficient.

  The main beam 10 is made of an aluminum alloy long material. The main beam 10 extends linearly from the front end to the rear end along the vehicle length direction of the trailer 1. The pair of main beams 10, 10 are arranged so as to be parallel to each other with a gap in the vehicle width direction.

  As shown in FIG. 2, the main beam 10 includes an upper flange portion 11, a lower flange portion 12, and a web portion 13. The upper flange portion 11 and the lower flange portion 12 are members that constitute the upper and lower portions of the main beam 10. The upper flange portion 11 and the lower flange portion 12 are formed to have the same width dimension. The web portion 13 is made of an aluminum alloy plate or extrusion. The upper end portion of the web portion 13 is welded and fixed to the upper flange portion 11 (not shown), and the lower end portion of the web portion 13 is fixed to the lower flange portion 12 by welding (not shown).

  The upper flange portion 11 is formed with the same thickness as the flooring 30. The upper surface of the upper flange portion 11 is configured to be flush with the upper surface of the flooring 30 and constitutes a part of the floor surface. The upper flange portion 11 is made of an extruded hollow shape member made of an aluminum alloy. As shown in the partially enlarged view of FIG. 2, the upper flange portion 11 is composed of an upper plate portion 11a, a lower plate portion 11b, and side plate portions 11c and 11c (only one is shown in the partially enlarged view of FIG. 2). It has the hollow part 14 divided. The hollow part 14 is divided | segmented by the reinforcement rib 16 (refer the whole figure of FIG. 2). The reinforcing rib 16 is disposed so as to connect the upper plate portion 11a and the lower plate portion 11b of the upper flange portion 11. The upper plate part 11a is formed thicker than the lower plate part 11b. The upper plate portion 11a is formed to have a thickness dimension equivalent to that of the upper plate portion 33 of the flooring 30 described later. The lower plate portion 11 b is formed to have a thickness dimension equivalent to that of the lower plate portion 34 of the flooring 30. The upper plate portions 11a and 33 correspond to thick plate portions, and the lower plate portions 11b and 34 correspond to thin plate portions. The upper plate portion 11a and the lower plate portion 11b at both end portions in the width direction of the upper flange portion 11 extend outward from the side plate portion 11c, respectively, and a concave groove (corresponding to a concave portion) 15 is formed inside thereof. Yes. The concave grooves 15 are fitted with meshing protrusions 37 (corresponding to convex portions) 37 of the flooring 30 to be described later. The lower flange portion 12 is made of an aluminum alloy plate or extruded profile.

  As shown in FIGS. 1 and 2, the flooring 30 is disposed between the pair of main beams 10 and 10 and on the outer side in the vehicle width direction. In order to distinguish the floor material 30, the three floor materials arranged in parallel between the main beams 10 and 10 are referred to as “inner floor material 30a”, and project to the vehicle width direction outer side of the main beam 10, respectively. The floor material disposed is referred to as “outer floor material 30b”, and the floor material disposed outside the outer floor material 30b is referred to as “outer floor material with side plate 30c”. The inner floor material 30a is welded and fixed to another inner floor material 30a adjacent in the width direction or the upper flange portion 11 of the main beam 10. One outer floor material 30b is provided on the outer side of each of the pair of main beams 10, and is fixed to the upper flange portion 11 by welding. The outer floor material 30c with side plate is welded and fixed to the outside of the outer floor material 30b. A side plate 41 having a U-shaped cross section is formed on the outer end of the outer floor material 30c with side plate.

  As shown in FIGS. 2 and 3, the flooring 30 is made of an aluminum alloy long material (a hollow extruded shape having a hollow portion 32). The hollow portion 32 is provided with an oblique member 31 arranged in a truss shape. In other words, the floor material 30 includes an upper plate portion 33, a lower plate portion 34, and a side plate portion 35, and an oblique material 31 that connects the upper plate portion 33 and the lower plate portion 34 to the inner hollow portion 32. Is provided. The upper plate portion (thick plate portion) 33 is formed thicker than the lower plate portion (thin plate portion) 34.

  Both end portions in the width direction of the floor material 30 have an uneven shape so as to mesh with the adjacent floor material 30 or the upper flange portion 11 of the main beam 10. Both ends in the width direction of the flooring 30 have a concave shape or a convex shape (excluding the outer side flooring 30c with side plates). In the present embodiment, the flooring 30 in which the ridges 37 (corresponding to the ridges) 37 are formed on one end, the ridges 37 are also formed on the other end, and a groove is formed on one end. The flooring 30 on which the 38 (corresponding to the concave portion) is formed has a concave groove 38 at the other end. The convex flooring 30 corresponds to the second member, and the concave flooring 30 corresponds to the first member. Both end portions in the width direction of the upper flange portion 11 of the main beam 10 have a concave shape, and the upper flange portion 11 corresponds to a first member. Convex floor materials 30 are arranged on both sides of the upper flange portion 11. The first member and the second member are arranged alternately.

  The convex flooring 30 (flooring 30 located on the side of the upper flange portion 11) is formed with stepped portions 36 at which the upper plate portion 33 and the lower plate portion 34 approach each other at both ends in the width direction. The step portion 36 is formed at the end portion of the upper plate portion 33 and the lower plate portion 34 at a portion located outside the side plate portion 35. The tip end side of the stepped portion 36 extends outward. The step portions 36 are formed at both ends of the upper plate portion 33 and the lower plate portion 34, respectively. On the front end side of the upper and lower stepped portions 36, 36, a protruding line 37 is constituted by a portion extending outward.

  At both ends in the width direction of the concave floor material 30 and the upper flange portion 11, the upper plate portion 33 and the lower plate portion 34 extend outward from the side plate portion 35, and a concave groove 38 is formed. The upper plate portion 33 extends linearly, and the outer surface and the inner upper surface of the side plate portion 35 are flush with each other. The lower plate portion 34 also extends linearly, and the outer and inner bottom surfaces of the side plate portions 35 are flush with each other.

  As shown in the partially enlarged view of FIG. 2, the inner dimension of the groove 38 is equal to the outer dimension of the ridge 37. The ridges 37 on the tip side of the stepped portion 36 are recessed grooves 38 of the adjacent flooring 30 (the center inner flooring 30a among the three inner flooring 30a) or the upper flange portion 11 of the main beam 10. The groove 15 is engaged (fitted).

  As shown in FIGS. 3 and 4, in the present embodiment, the protruding length of the ridge 37 is shorter than the depth (depth length) of the concave groove 38 (or the concave groove 15). A gap is formed between the tip of 37 and the bottom surface of the groove 38. A spacer 70 is provided on the bottom surface of the concave groove 38. The spacer 70 is for restricting the protrusion 37 from moving toward the bottom surface of the groove 38 during welding. The spacers 70 are arranged in a block shape, and a plurality of the spacers 70 are arranged at predetermined intervals along the longitudinal direction (vehicle length direction) of the concave groove 38. The spacer 70 is temporarily fixed to the bottom of the groove 38 before the protrusions 37 are fitted, and when the flooring 30 is fixed, the spacers 70 are pressed and fixed to the protrusions 37. The thickness of the spacer 70 is set according to the dimensional error of the floor materials 30 and 30 to be joined to each other, and the whole of the floor materials 30 and 30 connected to each other by abutting the ridges 37 against the spacer 70. The width is set to a desired dimension. The spacer 70 may be fixed by welding to the tip of the ridge 37. In this case, the spacer 70 is also installed at a predetermined position simply by fitting the ridge 37 into the groove 38, so that the temporary fixing operation of the spacer 70 can be omitted.

  The abutting portion between the base end portion of the ridge 37 and the tip end portion of the concave groove 38 is inclined so as to be separated from the surface of the upper plate portion 33 (or the lower plate portion 34) (as the distance from the ridge 37 increases). doing. That is, the V-groove 39 as a groove is formed on the floor surface and the back surface in a state where the ridge 37 is fitted in the groove 38. When the butt portion is welded, the V-groove 39 is filled with the weld bead 40 to form a weld 75. The lower welded portion 75 (hereinafter referred to as “first welded portion 75a”) is formed by welding the lower plate portions 34, 34 or the lower plate portions 34, 11b having a small plate thickness. The upper welded portion 75 (hereinafter referred to as “second welded portion 75b”) is a portion formed after the first welded portion 75a, and the upper plate portions 33, 33 or the upper plate portion 33 having a large plate thickness. , 11a are welded together.

  As shown in FIG. 2, on the outer side in the vehicle width direction of the outer floor material 30b, an adjustment protrusion 37 'having a vehicle width adjustment margin in the vehicle width direction is formed. The protruding protrusion 37 ′ for adjustment is formed so that the protruding length is longer than the protruding protrusion 37 of the other part by the vehicle width adjustment allowance. A reinforcing plate 43 is provided between the upper plate portion 33 and the lower plate portion 34 at the tip of the adjustment protrusion 37 '.

  An adjustment concave groove 38 ′ having a vehicle width adjustment margin in the vehicle width direction is formed on the inner side in the vehicle width direction of the outer side floor material 30 c with side plate. The adjustment concave groove 38 'is formed to have a groove depth longer than the other concave groove 38 by an amount corresponding to the vehicle width adjustment.

  After the adjustment protrusion 37 'of the outer floor material 30b is fitted into the adjustment groove 38' of the outer floor material 30c with side plate and the lower plate portions 34, 34 are welded together, the upper plate portions 33, 33 are welded. The outer flooring 30c with a side plate is fixed to the outer flooring 30b by welding each other. At this time, the final vehicle width dimension can be adjusted by adjusting the dimension in which the adjustment protrusion 37 'enters the adjustment groove 38'.

  Next, the joining method of the member which joins the flooring 30 of the above structures and its effect are demonstrated.

(Spacer installation process)
As shown in FIG. 3A, first, spacers 70 are inserted and temporarily fixed in the concave grooves 38 of the flooring 30 (or the concave grooves 15 of the upper flange portion 11). The thickness is adjusted according to the dimensional error of the width dimension of the flooring 30. A plurality of spacers 70 are provided at predetermined intervals in the longitudinal direction of the groove 38. Thus, by providing the spacer 70 whose thickness is adjusted according to the dimensional error of the flooring 30, the entire width of the joined flooring 30 and 30 can be adjusted to a desired dimension.

(Attack process)
Thereafter, the convex groove 37 of the floor material 30 disposed adjacent to the concave groove 38 of the floor material 30 is fitted, and the tip of the convex line 37 is placed on the surface of the spacer 70 installed at the bottom of the concave groove 38. Strike. Here, since the ridge 37 is abutted against the spacer 70, it does not enter the depth of the concave groove 38 any more. At this time, V-grooves 39 are formed at the abutting portions of the base end portion of the ridge 37 and the tip end portion of the concave groove 38 (15) on both the upper and lower surfaces of the flooring 30.

(First welding process)
Of the both surfaces of the flooring 30, the lower plate portions 34 and 34, which are thin plate portions, are first welded. Welding is performed while forming a weld bead 40 in the V-groove 39 at the abutting portion between the base end of the ridge 37 and the tip of the groove 38. Due to heat input during welding, the lower plate portions 34 and 34 are slightly contracted, and the ridges 37 try to enter the depths of the concave grooves 38. Because it is abutted, it can be prevented from entering further. Thereby, the uneven | corrugated deformation | transformation of the joint surface of flooring 30 can be suppressed.

  In the first welding process, a tensile stress (a force for separating the upper plate portions 33, 33) is generated at the abutting portion on the upper plate portions 33, 33 side, but the opening is generated because the heat input is small. Even if it is small.

(Second welding process)
As shown in FIG. 3 (b), after the lower plate portions 34 and 34 are welded, the upper plate portions 33 and 33, which are thick plate portions, are welded. Welding is performed while forming a weld bead 40 in the V-groove 39 at the abutting portion between the base end of the ridge 37 and the tip of the groove 38. Due to heat input during welding, the upper plate portions 33, 33 are slightly contracted, and the ridges 37 try to enter the depths of the concave grooves 38. Because it is abutted, it can be prevented from entering further. Further, since the upper plate portion 33 has a large plate thickness, the amount of heat input becomes relatively large, and a tensile stress is generated at the abutting portion on the opposite side surface (lower plate portions 34 and 34 side). Therefore, it is possible to prevent the openings from occurring. Thereby, the uneven deformation of the joint surface between the floor materials 30 can be suppressed, and the flatness of the entire floor portion 2 can be secured. Furthermore, since the positional relationship between the floor materials 30 and 30 is regulated by the abutment, the accuracy of the width dimension can be improved.

  Furthermore, since the spacer 70 is formed in a block shape and is provided in plural with a predetermined interval in the longitudinal direction of the concave groove 38, the protrusion length is increased over the entire length in the longitudinal direction of the ridge 37. In comparison, the increase in material can be reduced, which is advantageous in terms of weight and material cost.

  As described above, according to the joining method and joining structure of members according to the present embodiment, high dimensional accuracy can be obtained in the width direction of the joined floor materials 30 and 30 as a whole, and between the floor materials 30 and 30. The flatness can be ensured, and as a result, the accuracy of the width dimension of the floor 2 and the improvement of the flatness can be achieved.

  Furthermore, according to the present embodiment, by providing a vehicle width adjusting function between the outer floor material 30b and the outer floor material 30c with a side plate, the accuracy of the vehicle width dimension can be further improved. A wide loading space can be secured within the specified dimensions.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not the meaning limited to the said embodiment, A design change is possible suitably in the range which does not deviate from the meaning of this invention. For example, in the above-described embodiment, the spacer 70 is provided on the bottom surface of the concave groove 38, and the leading end of the ridge 37 is abutted against the spacer 70. However, the present invention is not limited to this, as shown in FIG. In addition, the lengths of the upper plate portion 33 and the lower plate portion 34 extending to the outside of the step portion 36 may be increased so as to directly abut against the bottom surface of the groove 38. According to such a configuration, it is possible to reduce the trouble of forming and installing the spacer 70.

  Further, as shown in FIG. 6A, a spacer 70 may be integrally formed at the tip of the ridge 37. In this case, the spacer 70 is formed at the same time as the protrusion 37 is extruded. According to such a configuration, since the spacer 70 also serves as a reinforcing rib, the rigidity of the ridge 37 is improved. In the case where the spacer 70 is integrally formed, it is preferable to leave the spacer 70 at a predetermined interval and cut away an unnecessary portion to form a notch 71 as shown in FIG. According to such a configuration, the weight of the flooring 30 can be reduced while leaving a part of the ridges 37 as the spacers 70, and the weight of the floor can be reduced.

  Moreover, in this embodiment, although the case where the joining method and joining structure of a member were employ | adopted and demonstrated as an example for the floor part 2 of the trailer 1 which is a vehicle for cargo transportation, it is not limited to the trailer 1, Of course, it can also be used in the floor of other cargo transportation vehicles such as trucks and the floor of cargo transportation containers. Furthermore, it is needless to say that the present invention can be applied to the joining of members other than the floor portion of a cargo carrying vehicle or a cargo carrying container.

  Furthermore, in the said embodiment, although the protruding item | line 37 is fitted to the ditch | groove 38, it is not limited to this. A concave groove may be formed in one member, and a convex line may not be formed in the end of the other member, and it may be inserted into the concave groove as it is. At this time, the plate | board thickness of the other member becomes equivalent to the internal dimension of a ditch | groove. With such a configuration, a step is generated on the joint surface between the members, but the structure can be applied as a joint structure where a step can be allowed.

  Such a junction structure is illustrated in FIG. FIG. 7 shows a structure in which the edge of one profile is welded to the side surface of the other profile. The member joining structure shown in FIG. 7A is obtained by abutting an end 121 serving as a small edge of the second member 120 against a concave groove 112 formed in the side end 111 of the first member 110. It is. The end 121 of the second member 120 abuts against the bottom surface of the concave groove 112. There is a step between the surface of the first member 110 (the vertical surface in FIG. 7A) 113 and the surface of the second member 120 (the vertical surface in FIG. 7A) 123. Since it generate | occur | produces, the 1st member 110 and the 2nd member 120 are joined by fillet welding. Even in such a structure, since the end 121 of the second member 120 abuts against the bottom surface of the concave groove 112 of the first member 110, the first member 110 and the second member 120 are slightly contracted by the heat input of welding. Thus, even if the second member 120 tries to enter the depth of the concave groove 112, it can be prevented from entering further. Thereby, deformation of the joint can be suppressed.

  In the member joining structure shown in FIG. 7B, the side end portion 126 of the second member 125 is abutted against the concave groove 117 formed in the end portion 116 that becomes the fore edge of the first member 115. It is. A part of the end portion 126 of the second member 125 is in contact with the bottom surface of the concave groove 117. There is a step between the surface 118 of the first member 115 (the vertical surface in FIG. 7A) 118 and the surface 128 of the second member 125 (the vertical surface in FIG. 7A) 128. Therefore, the first member 115 and the second member 125 are joined by fillet welding. Even in such a structure, since the side end portion 126 of the second member 125 is in contact with the bottom surface of the concave groove 117 of the first member 115, the second member 120 can be prevented from entering the back of the concave groove 112. . Thereby, deformation of the joint can be suppressed.

1 Trailer (cargo vehicle)
2 Floor 3 Joining structure 10 Main beam 11 Upper flange (first member)
15 groove (concave)
30 Flooring material (first member or second member)
30a Inner plate material 30b Outer plate material 30c Outer floor material with side plate 32 Hollow part 33 Upper plate part (thick plate part)
34 Lower plate (thin plate)
37 Projections (convex parts)
38 Groove (concave)
70 spacer

Claims (5)

A first member that has plate portions on both sides and is formed into a hollow surface, wherein one of the plate portions is a thin plate portion and the other plate portion is a thick plate portion thicker than the thin plate portion. And the second member are joined together by welding along the surface direction and joined by welding,
The abutting step of abutting the end of the second member against the bottom of the recess formed at the end of the first member;
And a welding step of welding the thick plate portions on the other surface after welding the thin plate portions on one surface of the both surfaces. In the said abutting process, a spacer is provided in the bottom of the said recessed part, and the edge part of said 2nd member is abutted on the said spacer. The joining method of the member of Claim 1 characterized by the above-mentioned. The method of joining members according to claim 2, wherein the spacer has a thickness set according to a dimensional error between the first member and the second member. A first member that has plate portions on both sides and is formed into a hollow surface, wherein one of the plate portions is a thin plate portion and the other plate portion is a thick plate portion thicker than the thin plate portion. And a second member, a method for manufacturing a cargo carrying vehicle having a floor portion formed by joining along a surface direction and joining by welding,
The step of forming the floor includes an abutting step of abutting the end of the second member against the bottom of a recess formed in the end of the first member, and the thin plate on one of the two surfaces A welding step of welding the thick plate portions on the other surface after the portions are welded to each other.
A method for manufacturing a freight carrying vehicle. A first member that has plate portions on both sides and is formed into a hollow surface, wherein one of the plate portions is a thin plate portion and the other plate portion is a thick plate portion thicker than the thin plate portion. And a second member, a method for manufacturing a cargo carrying container having a floor portion formed by joining along a surface direction and joining by welding,
The step of forming the floor includes an abutting step of abutting the end of the second member against the bottom of a recess formed in the end of the first member, and the thin plate on one of the two surfaces A welding step of welding the thick plate portions on the other surface after the portions are welded to each other.
A method for manufacturing a freight carrying container.

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