JP2007145256A - Railway vehicle and skeleton welding method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a railway vehicle in which a skeleton is joined to an outer plate without impairing the appearance of a vehicle body. <P>SOLUTION: The railway vehicle is provided with the outer plate 11 joined with the skeleton comprising a vertical bone 12 and a lateral bone 17, and the vertical bone 12 and the lateral bone 17 are bone members having joint surfaces 12a, 17c joined to the outer plate 11 bent in an opposite direction so as to clamp its standing surface; and coupling surfaces 12c, 17a becoming in the state floating from the outer plate 11. In the skeleton joined with the joint surfaces 12a, 17c of the bone member to the outer plate 11, an end of the lateral bone 17 intrudes between the joint surface 12c of the vertical bone 12 and the outer plate and the joint surfaces 12c, 17a of the vertical bone 12 and the lateral bone 17 brought into contact with each other are joined to each other. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a railway vehicle and a frame joining method that are assembled by joining a roof structure, a side structure, and the like, and particularly when a frame is joined to an outer plate constituting the side structure etc., welding marks appearing on the finished surface of the table are conspicuous. The present invention relates to a framework welding method that is not provided, a railway vehicle configured by the method, and a framework joining method.

  High-speed railway vehicles such as Shinkansen vehicles use aluminum vehicles, and a railway vehicle is configured by joining extruded material of 20 m corresponding to the entire length of the vehicle body. On the other hand, railroad cars traveling on conventional lines are often used with unpainted vehicles mainly for labor-saving maintenance, and aluminum structures are inferior in terms of scratches and dirt. It has been adopted. In that case, a vehicle structure having a structure in which parts such as a side structure block are joined and combined instead of the extrusion mold material is adopted as the stainless steel structure.

2. Description of the Related Art In recent years, a railway vehicle has been developed that is assembled by a structure block in which a frame that is a core material is welded and integrated with a stainless steel outer plate, and is disclosed in, for example, Japanese Patent Application Laid-Open No. 2002-104180. Here, FIG. 14 is a plan view showing the side structure of the railway vehicle disclosed in the publication.
The railway vehicle is constituted by a railway vehicle structure in which the side structure, the roof structure, the wife structure, and the underframe are joined. The side structure 100 on one side constituting such a railway vehicle has two sets of vehicle end window blocks 101, two sets of intermediate window blocks 102, and three sets of side entrance blocks located between the window blocks 101 and 102. 103.

  The vehicle end window block 101 and each intermediate window block 102 are configured by joining a framework to outer plates 110 and 120 including a curtain plate portion, and each outer plate 110 and 120 has an upper outer plate and a lower lower plate. It is divided into an outer plate and the whole is formed larger than the framework provided inside the vehicle body. Further, the side entrance block 103 has a door attached to an entrance opening portion in which an entrance frame plate 130 including a curtain plate portion is constituted by an upper frame member, a lower frame member, and a side frame member. Then, the two sets of the vehicle end window block 101, the intermediate window block 102, and the three sets of side entrance blocks 103 are integrated as shown in FIG.

Among those constituting the side structure 100, for example, the intermediate window block 102 has a frame 201 assembled as shown in FIG. 15 joined to the outer plate 120. The frame 201 is composed of four side pillars 211 which are vertical bones, and the horizontal bones of the curtain belt member 212, the waist belt member 213 and the long base member 214 are joined, and the vertical bones of the waist bone 215 and the curtain bone 216 above and below the window opening. It is constructed by joining bones. The outer plate 120 is composed of an upper outer plate 121 and a lower outer plate 122 that are larger than the framework 201. The upper outer plate 121 is formed with a window opening, and is blown from the waistband member 213 to the upper curtain plate portion. The lower outer plate 122 is affixed to the waist plate portion. Also, outer plate reinforcing bones 217 are attached to the inner side between the bone members of the outer plate 120 and the upper part of the curtain band member 212.
JP 2002-104180 A (page 2-3, FIG. 2, FIG. 4) JP 2002-103074 A (page 3, FIG. 2) Japanese Patent Laying-Open No. 2005-263126 (page 6-7, FIGS. 7 and 8) JP 09-030414 A (3rd page, FIG. 14)

By the way, when the frame 201 is integrally joined to the outer plate 120, conventionally, the bonding has been performed by spot welding, but recently, other than the joining of the outer plates of the upper outer plate 121 and the lower outer plate 122, Laser welding has also been attempted for joining the frame 201.
However, even when a low-power laser beam is used, when welding vertical bones such as the side columns 211 and the outer plate reinforcing bones 217, welding marks appearing on the finished surface on the front side of the vehicle body become conspicuous. Generally, the surface of the outer plate 120 that is a stainless steel plate is subjected to hairline finishing in the longitudinal direction of the vehicle body, that is, in the lateral direction. Accordingly, when laser welding a horizontal bone such as the curtain member 212 to the outer plate 120, the welding mark is inconspicuous because it matches the direction of the finish line such as a hairline, but the vertical bone such as the side column 211 is laser welded. The weld marks that are made appear in a direction that intersects the finish, so even a subtle bulge is conspicuous. Therefore, when the frame is laser-welded to the outer plate, the weld marks deteriorate the appearance of the vehicle body, and the appearance of the railway vehicle is not desirable in design.

  Accordingly, the present invention provides a railway vehicle in which a framework is joined to the outer plate without deteriorating the appearance of the vehicle body, and a framework joining method for joining the framework to the outer plate without deteriorating the outer appearance, in order to solve such a problem. With the goal.

  The railway vehicle of the present invention includes an outer plate to which a frame composed of a longitudinal bone and a horizontal bone is joined, and the vertical bone and the lateral bone are in an upright state in which they stand up with respect to the joined outer plate. A bone member that is bent in the opposite direction across the rising surface and is joined to the outer plate, and a joint surface that floats from the outer plate. In the frame whose surface is joined to the outer plate, the end of the transverse bone enters between the joint surface of the longitudinal bone and the outer plate, and the joint surfaces of the longitudinal bone and the transverse bone that are in surface contact are joined together It is characterized by becoming.

  The railway vehicle of the present invention includes an outer plate to which a frame composed of vertical and horizontal bones is joined. The vertical and horizontal bones are bent at an intermediate surface and both ends of the intermediate surface in the width direction. This is a bone member in which a raised surface and a flange surface that is bent outward from the standing surface are formed. In the framework in which the bone member is bonded to the outer plate, the intermediate surface of the longitudinal bone is bonded to the outer plate. The horizontal bone has its end portion inserted between the flange surface of the longitudinal bone and the outer plate, the flange surface or the intermediate surface is joined to the outer plate, and the flange surface of the vertical bone and the intermediate surface of the horizontal bone which are in surface contact with each other Alternatively, the flange surfaces are joined.

In the railway vehicle of the present invention, it is preferable that the joint surface or the flange surface is formed only at a joint portion where the longitudinal bone and / or the lateral bone are joined to each other.
In the railway vehicle of the present invention, the frame is laser-welded to the outer plate, and the vertical bone has a joint surface or an intermediate surface of the finishing plate on the finished surface side of the outer plate. It is preferable that welding is performed by sending a laser beam in the same width direction.
In the railway vehicle of the present invention, it is preferable that a plurality of laser weldings in the longitudinal direction are performed on the joint surface or the intermediate surface of the longitudinal bones in such a number that the joint strength to the outer plate can be obtained.

On the other hand, the frame welding method of the present invention is a method for laser welding a frame composed of vertical and horizontal bones to the outer plate of a railway vehicle structure, wherein the vertical and horizontal bones are joined to each other. A standing surface that is in a standing state with respect to the plate, a joint surface that is bent in the opposite direction across the rising surface and is joined to the outer plate, and a joint surface that is in a state of floating from the outer plate The vertical bone is welded by sending a laser beam in the width direction along the finish of the outer plate to the joint surface that is in surface contact with the outer plate. Welding is performed by sending a laser beam in the longitudinal direction along the finished surface of the outer plate to the joint surface in surface contact.
Further, in the frame joining method of the present invention, it is preferable that a plurality of laser weldings in the longitudinal direction are performed on the joining surface of the longitudinal bone in such a number that the joining strength to the outer plate is obtained.

  Therefore, according to the present invention, for example, in the case of a hat-shaped bone member, the longitudinal bone abuts the intermediate surface as a joint surface to the outer plate, and laser welding along the finish of the outer plate is performed on the intermediate surface. In the direction, the transverse bone abuts the flange surface as a joint surface against the outer plate, and the flange surface is laser welded in the longitudinal direction along the finish. Therefore, since the frame is laser-welded only in the same direction as the finish of the outer plate, the welding marks appearing on the finished surface can be made inconspicuous.

  Further, according to the present invention, in the case of a bone member having a hat shape, for example, as described above, if the longitudinal bone is a joint surface and the intermediate surface is brought into contact with the outer plate, the end portion of the transverse bone is a joint of the longitudinal bone. Since the surface of the longitudinal bone and the lateral bone are in contact with each other, the flange surface of the longitudinal bone and the intermediate surface or the flange surface of the joint surface of the transverse bone are in surface contact. The joint surfaces are joined by laser welding, spot welding, or the like, so that the joint member can be omitted, and the cost can be reduced and the weight of the vehicle body can be reduced.

  Next, an embodiment of a railway vehicle and a frame joining method according to the present invention will be described below with reference to the drawings. The railway vehicle according to the present embodiment is configured by joining a roof structure, a wife structure, and a frame to a side structure as shown in FIG. And the side structure similarly arrange | positions a side entrance block between a vehicle end and an intermediate | middle window block, and each joined and united.

  FIG. 1 is a perspective view showing the state where the intermediate window block and the side entrance block constituting such a side structure are separated from the outside of the vehicle body. The side entrance block 20 is shown as a whole, but the intermediate window block 10 is shown as half. FIG. 2 is a view showing a state in which the intermediate window block 10 and the side inlet block 20 are joined from the inside of the vehicle body, in which both halves are shown.

  The intermediate window block 10 and the side entrance block 20 or the vehicle end window block (not shown) are both framed on the inner side of the vehicle body to the outer plate 11 to prevent out-of-plane deformation. In the railway vehicle according to the present embodiment, the intermediate window block 10 constituting the side structure is configured by joining a framework to the outer plate by laser welding. Therefore, the structure and method for joining the frame to the outer plate will be described by taking the intermediate window block 10 as an example.

  In the framework of the intermediate window block 10, a plurality of bone members are vertically and horizontally assembled and joined to the inner side of the vehicle body of the outer plate 11. Specifically, side columns 12 are provided along the vertical sides of the window openings 19 formed in the outer plate 11, and side columns 13 positioned at the left and right ends of the outer plate 11 are further provided. . On the other hand, a curtain belt member 15 and a waist belt member 16 are provided above and below along the lateral side of the window opening 19, and a hip bone 14 is provided vertically below an intermediate position of the window opening 19. A plurality of reinforcing bones 17 and 18 arranged in a lateral direction are provided between the side columns 12 and 13 and the hip bones 14 provided in the vertical direction.

  As shown in FIG. 1, the intermediate window block 10 is obtained by dividing the outer plate 11 into upper and lower portions, and the upper outer plate 11 </ b> A and the lower outer plate 11 </ b> B are joined at the height of the window opening 19. On the inner side of the vehicle body of the outer plate 11, a framework composed of the above-described side columns 12 and the like is integrally joined by laser welding. Bone members such as the side columns 12 and 13, the hipbone 14, the curtain band member 15, the waistband member 16, and the reinforcing bones 17 and 18 are members having a hat-shaped cross section that is frequently used in a railway vehicle structure. In the joining method according to the present embodiment, a framework composed of such bone members is joined to the outer plate 11 by laser welding. At that time, since the finish line by the hairline is put sideways on the finished surface of the outer plate 11, a method is adopted in which the welding marks are not conspicuous.

  Here, FIG. 3 is a diagram showing an AA cross section of FIG. The entrance frame 21 is disposed along the longitudinal side of the entrance opening 29 on the side entrance block 20 side, which is a portion cut from the intermediate window block 10 to the side entrance block 20. The entrance frame 21 is a bone member having a U-shaped cross section. And the side pillar 13 and the side pillar 12 are provided in the intermediate | middle window block 10 side in parallel with the entrance flame | frame 21, and the reinforcement bone | frame 17 which is a horizontal bone is arrange | positioned between these side pillars 12 and 13. FIG. As described above, the side columns 12 and 13 and the reinforcing bones 17 are hat-shaped bone members in which flange surfaces are formed at both ends of a U-shaped section.

  The hat-shaped bone member seen in the side pillars 12 and 13 has a U-shaped cross section due to the standing surface 12b formed by bending to the both sides in the width direction of the intermediate surface 12a, for example, as shown in the side pillar 12. A flange surface 12c that is a three-dimensional shape and is further widened outwardly in the width direction is formed. In the present embodiment, when such a hat-shaped bone member is laser-welded to the outer plate 11, the side columns 12 and 13 that are particularly vertical bones have intermediate surfaces 12 a and 13 a as the outer plate 11 as shown in FIG. 3. To. Therefore, the intermediate surfaces 12a and 13a become joint surfaces, and laser welding is performed there. The same applies to longitudinal bones such as the hip bone 14 (not shown). On the other hand, as shown in FIG. 3, the reinforcing bone 17, which is a horizontal bone, has a flange surface 17 c opposite to the vertical bone applied to the outer plate 11. Therefore, the flange surface 17c becomes a joint surface, and laser welding is performed there. The same applies to horizontal bones such as the curtain belt member 15, the waist belt member 16, and the reinforcing bone 18 (not shown).

4 is a right side portion of the window opening 19 of the intermediate window block 10 shown in FIG. 2, and shows a weld bead formed by extracting a portion corresponding to the AA cross section of FIG. 3 and further laser welding. It is.
The side columns 12 and 13 which are vertical bones are arranged in a vertical direction intersecting with the direction of the finish on the opposite surface of the outer plate 11, and the intermediate surfaces 12 a and 13 a contacting the outer plate 11 are irradiated with the laser beam. Is done. Since the intermediate surfaces 12a and 13a are wider in the width direction than the flange surfaces 12c and 13c, the laser beam is sent to the intermediate surfaces 12a and 13a in the width direction, that is, in the lateral direction parallel to the finish. And the laser welding sent to such a width direction is intermittently performed over the longitudinal direction of the side pillars 12 and 13.

Therefore, a plurality of transverse weld beads B are formed in the longitudinal direction on the intermediate surfaces 12a and 13a as shown in FIG. At this time, welding to the intermediate surfaces 12a and 13a is performed by a predetermined number at predetermined intervals in order to ensure the bonding strength of the side columns 12 and 13.
On the other hand, the reinforcing bone 17 which is a horizontal bone is arranged in a horizontal direction parallel to the direction of the finish of the outer plate 11, and a laser beam is irradiated to the flange surface 17 c in contact with the outer plate 11. The laser beam is continuously sent in the longitudinal direction of the reinforcing bone 17 along the finish line, and one weld bead B as shown in FIG. 4 is formed on both the upper and lower flange surfaces 17c.

  Therefore, according to the joining method of the present embodiment, the plurality of weld beads B made of vertical bones such as the side columns 12 and 13 and the weld beads B made of horizontal bones such as the reinforcing bones 17 are both outer plates. 11 It becomes the same direction as the finish of the surface. Therefore, in the railway vehicle, all the welding marks appearing on the surface of the outer plate 11 by laser welding are in line with the finish, so that the welding marks on the side surface of the vehicle body can be made inconspicuous, for example.

  Here, FIG. 5 is an enlarged cross-sectional view showing a P portion surrounded by an alternate long and short dash line in FIG. 3, which is a joint between the vertical bone and the horizontal bone. The laser beam applied to the bone members such as the side pillars 12 and 13 and the reinforcing bone 17 adjusts the laser irradiation energy so that the penetration depth of the welded portion is heated up to the middle of the outer plate 11 in the thickness direction. Control is performed such that melting and welding are performed. Therefore, as seen in the weld bead B portion of FIG. 5, the laser beam irradiation melts the intermediate plate 12 a beyond the intermediate surface 12 a of the side column 12 to the intermediate depth of the outer plate 11 to form a joint portion.

  By the way, in this embodiment, as shown, for example in FIG. 5, the structure which inverts a hat-shaped bone member in the side pillar 12 which is a vertical bone, and joins the intermediate surface 12a is laser-welded along a finishing eye. The above-described effect was obtained, but such a configuration also produced another new effect. That is, since the flange surface 12c of the longitudinal bone floats from the outer plate 11 and the horizontal bone enters between them, the joint member between the longitudinal bone and the lateral bone can be omitted.

Conventionally, the joint between the longitudinal bone and the lateral bone is configured as disclosed in, for example, Japanese Patent Laid-Open No. 9-30414 shown in FIG. At the joint where the hat-shaped longitudinal bone 301 and the transverse bone 302 intersect, the end of the transverse bone 302 that is orthogonal to the longitudinal bone 301 is disposed so as to abut against it. And the solid joint 303 as shown in figure is joined to the vertical bone 301 and the horizontal bone 302 by spot welding etc. there.
A joint member such as the three-dimensional joint 303 is required for each crossing portion of the vertical bone and the horizontal bone, so that the number of parts increases and the cost is increased. In particular, the total weight of the joint members used in the entire vehicle is high. It had a great influence on the weight reduction of vehicles. In this respect, in the railway vehicle according to the present embodiment, the joint member can be omitted as described below, thereby reducing the cost and reducing the weight of the vehicle body.

  As shown in FIG. 5, the side column 12, which is a vertical bone, has an intermediate surface 12 a joined to the outer plate 11, and flange surfaces 12 c projecting from both ends of the side column 12 are floating from the outer plate 11. On the other hand, the reinforcing bone 17 which is a horizontal bone has a flange surface 17 c joined to the outer plate 11, opposite to the side column 12. Therefore, the end portion of the reinforcing bone 17 enters the gap between the flange surface 12 c of the side column 12 and the outer plate 11, and the flange surface 12 c and the intermediate surface 17 a of the reinforcing bone 17 are in surface contact. Therefore, it is possible to obtain sufficient joint strength between the side column 12 and the reinforcing bone 17 without using a joint member by directly joining the flange surface and the intermediate surface in contact with each other.

  By the way, although this embodiment was described from the surface of the effect of making the welding mark which appears on a finishing surface inconspicuous mainly when carrying out laser welding of a framework, the composition which joins the intermediate surface of a longitudinal bone as mentioned above is a framework. The joint member can be omitted and it can be obtained as an effect of reducing the weight of the vehicle body. In such a case, the means for joining the frame composed of the side pillars 12 and the like is not limited to laser welding, but may be other spot welding, arc plug welding, joining with screws or claws or a combination thereof. There may be.

Then, paying attention to such a joining structure of the longitudinal bone and the transverse bone, each form of the joining structure in which the joint member is omitted will be described. However, the joining method is not limited to a specific one as described above, but here, a case where laser welding is used will be described.
6 to 10 are views showing each form of the joint structure focusing on the joint structure of the bone member. FIG. 6A is a cross-sectional view of the longitudinal bone in the longitudinal direction, and FIG. A plan view and FIG. (C) are cross-sectional views of the transverse bone in the longitudinal direction. Each of the frames is a frame joined to the outer plate, and shows a state in which the horizontal bone is abutted from both the left and right sides of the longitudinal bone.

  First, the joining structure shown in FIG. 6 will be described. Similar to the one shown in FIG. 3, the longitudinal bone 31 is laser-welded to the outer plate 11 at the intermediate surface 31a, and the horizontal bone 41 is laser-welded to the outer plate 11 at the flange surface 41c. A weld bead B is formed on the surface. And since the standing surface 31b of the vertical bone 31 is higher than the standing surface 41b of the horizontal bone 41, the flange surface 31c of the vertical bone 31 has overlapped with the intermediate surface 41a of the edge part of the horizontal bone 41 from the top. Therefore, the flange surface 31c and the intermediate surface 41a are laser-welded to form a weld bead B as shown. Thus, the vertical bone 31 and the horizontal bone 41 can be joined without providing a joint, and the weight of the vehicle body can be reduced by omitting the joint at the joint.

  Next, the junction structure shown in FIG. 7 will be described. As for the longitudinal bone 32, the intermediate surface 32a is laser-welded to the outer plate 11 as before. In this embodiment, the horizontal bone 42 is inverted in the same manner as the vertical bone 32, the flange surface 42c is lifted from the outer plate 11, the intermediate surface 42a is in contact with the outer plate 11, and the intermediate surface 42a is laser welded. A weld bead B is formed as indicated by a two-dot chain line. Since the standing surface 32b of the longitudinal bone 32 is higher than the standing surface 42b of the transverse bone 42, the flange surface 32c of the longitudinal bone 32 overlaps with the flange surface 42c at the end of the transverse bone 42 from above. Therefore, the flange surfaces 32c and 42c are laser-welded to form a weld bead B as shown. Thus, the vertical bone 32 and the horizontal bone 42 can be joined without providing a joint, and the weight of the vehicle body can be reduced by omitting the joint at the joint.

Next, the joining structure shown in FIG. 8 will be described. Up to now, hat-shaped bone members have been used for the longitudinal bone and the transverse bone. However, in this embodiment, a bone member having a U-shaped cross section is used as a whole, and a short flange is provided at the joining position of the longitudinal bone 33 and the transverse bone 43, respectively. 33c and 43c are formed. That is, in the longitudinal bone 33, a short flange 33c is formed at a position where the horizontal bone 43 is located, and in the horizontal bone 43, a short flange 43c is formed at an end thereof.
The vertical bone 33 is laser-welded to the outer plate 11 at the intermediate surface 33a as before, and the horizontal bone 43 is in contact with the outer plate 11 at the intermediate surface 43a similarly to the vertical bone 33. Are laser welded. Therefore, weld beads B indicated by two-dot chain lines are formed on the intermediate surfaces 33a and 43a, respectively.

  Since the standing surface 33b of the vertical bone 33 is higher than the standing surface 43b of the horizontal bone 43, the short flange 33c of the vertical bone 33 overlaps the short flange 43c at the end of the horizontal bone 43 from above. Therefore, the short flanges 33c and 43c are laser-welded with each other, and a weld bead B is formed as shown. Thus, the vertical bone 33 and the horizontal bone 43 can be joined without providing a joint, and the weight of the vehicle body can be reduced by omitting the joint at the joint. Furthermore, the weight of the vehicle body can be further reduced by reducing the weight of the bone member by using the flanges of the bone member as short flanges 33c and 43c having only joint portions.

  Next, the junction structure shown in FIG. 9 will be described. The longitudinal bone 34 of this embodiment is a bone member having a U-shaped cross section throughout and having a short flange 34c formed at the joining position, and the transverse bone 44 is a hat-shaped bone member. The vertical bone 34 is laser-welded to the outer plate 11 at the intermediate surface 34a, and the horizontal bone 44 is laser-welded to the outer plate 11 at the flange surface 44c, and the weld bead B as indicated by a two-dot chain line. Is formed. Since the standing surface 34b of the longitudinal bone 34 is higher than the standing surface 44b of the lateral bone 44, the short flange 34c of the longitudinal bone 34 overlaps the intermediate surface 44a of the end portion of the lateral bone 44 from above. Therefore, the short flange 34c and the intermediate surface 44a are laser-welded to form a weld bead B as shown. Thus, the vertical bone 34 and the horizontal bone 44 can be joined without providing a joint, and the weight of the vehicle body can be reduced by omitting the joint at the joint. In addition, since the joint portion of the vertical bone 34 is the short flange 34c, the weight of the bone member can be reduced, thereby further reducing the weight of the vehicle body.

  Next, the junction structure shown in FIG. 10 will be described. The longitudinal bone 35 of the present embodiment is a bone member having a U-shaped cross section throughout and having a short flange 35c formed at the joining position, and the lateral bone 45 is a hat-shaped bone member. Both the vertical bone 35 and the horizontal bone 45 are laser welded to the outer plate 11 at intermediate surfaces 35a and 45a, and a weld bead B is formed as indicated by a two-dot chain line. And since the standing surface 35b of the vertical bone 35 is higher than the standing surface 45b of the horizontal bone 45, the short flange 35c of the vertical bone 35 has overlapped with the flange surface 45c of the edge part of the horizontal bone 45 from the top. In particular, in the present embodiment, the short flange 35c of the longitudinal bone 35 is provided on only one side of the longitudinal bone 35 only in a portion overlapping the two flange surfaces 45c of the transverse bone 45. The short flange 35c and the flange surface 45c are laser welded to form a weld bead B as shown. Thus, the vertical bone 35 and the horizontal bone 45 can be joined without providing a joint, and the weight of the vehicle body can be reduced by omitting the joint at the joint. Furthermore, the joint part of the vertical bone 35 is made into the short flange 35c, and the weight reduction of a bone member can achieve further weight reduction of a vehicle body.

Furthermore, the following may be used in which the form of the bone member is changed. In the joint structure shown in FIG. 11, a bone member having a Z-shaped cross section is used for the longitudinal bone 36, and a hat-shaped bone member is used for the transverse bone 46. The longitudinal bone 36 is joined in contact with the outer plate 11, a standing surface 36 b that stands up with respect to the outer plate 11, and a direction opposite to the joining surface 36 a across the standing surface 36 b. The joint surface 36c is bent.
The longitudinal bone 31 is laser-welded to the outer plate 11 at the joint surface 36a, and the horizontal bone 46 is laser-welded to the outer plate 11 at the flange surface 46c, and a weld bead B is formed as indicated by a two-dot chain line. Since the standing surface 36b of the longitudinal bone 36 is higher than the standing surface 46b of the transverse bone 46, the joint surface 36c of the longitudinal bone 36 overlaps the joint surface 46a at the end of the transverse bone 46 from above. Therefore, the joint surface 36c and the joint surface 46a are laser-welded to form a weld bead B as shown. Thus, the vertical bone 36 and the horizontal bone 46 can be joined without providing a joint, and the weight of the vehicle body can be reduced by omitting the joint at the joint. Further, since the longitudinal bone 36 has a Z-shaped cross section and has a small overall area, further weight reduction of the vehicle body can be achieved by reducing the weight of the bone member.

  Next, in the joining structure shown in FIG. 12, a bone member having a U-shaped cross section is used for the longitudinal bone 37, a short flange 37c is formed at the joining portion, and the cross section of the transverse bone 47 is Z-shaped. Used bone members are used. The longitudinal bone 37 is laser-welded to the outer plate 11 at the intermediate surface 37a, and the transverse bone 47 is laser-welded at the joining surface 47a to form a weld bead B as indicated by a two-dot chain line. Since the standing surface 37b of the vertical bone 37 is higher than the standing surface 47b of the horizontal bone 47, the short flange 37c of the vertical bone 37 overlaps the joint surface 47c at the end of the horizontal bone 47 from above. Therefore, the short flange 37c and the joint surface 47c are laser welded to form a weld bead B as shown. Thus, the vertical bone 37 and the horizontal bone 47 can be joined without providing a joint, and the weight of the vehicle body can be reduced by omitting the joint at the joint. Furthermore, since the joint part of the vertical bone 37 is made into the short flange 37c, and the crossbone 47 is a Z-shaped cross-section, and the whole area is small, weight reduction of a bone member can achieve further vehicle body weight reduction.

Therefore, according to the railway vehicle and the frame joining method of the present embodiment, for example, in the case of a hat-shaped vertical bone, the intermediate surface is brought into contact with the outer plate as the joining surface, and laser welding is performed on the intermediate surface along the finish of the outer plate. Therefore, since the frame is laser-welded only in the same direction as the finish of the outer plate, the welding marks appearing on the finished surface can be made inconspicuous.
In the present embodiment, since the joint surfaces such as the flange surface and the short flange of the longitudinal bone are arranged with a gap between them and the outer plate, the end of the lateral bone is in surface contact with the joint surface, By joining, the joint member can be omitted, and the cost can be reduced and the vehicle weight can be reduced.

As mentioned above, although one Embodiment was described about the rail vehicle and the frame joining method of this invention, this invention is not limited to this, A various change is possible in the range which does not deviate from the meaning.
For example, when the purpose is to reduce the weight of the vehicle body by omitting the joint as described above, spot welding or the like may be used for joining the frames in addition to laser welding.
Further, in the present invention, the joint member is not necessarily omitted at all joints between the longitudinal bone and the lateral bone. When strength is required, the joint structure of the above embodiment is used as shown in FIG. In addition, the joint 50 may be joined.

It is the perspective view which showed the state which the intermediate | middle window block and side entrance block which comprise the side structure of a railway vehicle isolate | separated from the vehicle body outer side. It is the figure which showed the framework structure joined to the outer plate about a part of side structure which comprises a rail vehicle. It is the figure which showed the AA cross section of FIG. FIG. 2 is a view showing a weld bead formed by laser welding with the AA periphery enlarged. It is an expanded sectional view which shows P section enclosed with the dashed-dotted line in FIG. 3 which is a junction part of a longitudinal bone and a horizontal bone. It is the figure which showed one form of the joining structure of a bone member, and is sectional drawing (a) which looked at the longitudinal bone in the longitudinal direction, top view (b), and sectional drawing (c) which looked at the transverse bone in the longitudinal direction. . It is the figure which showed one form of the joining structure of a bone member, and is sectional drawing (a) which looked at the longitudinal bone in the longitudinal direction, top view (b), and sectional drawing (c) which looked at the transverse bone in the longitudinal direction. . It is the figure which showed one form of the joining structure of a bone member, and is sectional drawing (a) which looked at the longitudinal bone in the longitudinal direction, top view (b), and sectional drawing (c) which looked at the transverse bone in the longitudinal direction. . It is the figure which showed one form of the joining structure of a bone member, and is sectional drawing (a) which looked at the longitudinal bone in the longitudinal direction, top view (b), and sectional drawing (c) which looked at the transverse bone in the longitudinal direction. . It is the figure which showed one form of the joining structure of a bone member, and is sectional drawing (a) which looked at the longitudinal bone in the longitudinal direction, top view (b), and sectional drawing (c) which looked at the transverse bone in the longitudinal direction. . It is the figure which showed another form of the joining structure of a bone member, and is sectional drawing (a) and the top view (b) which looked at the longitudinal bone in the longitudinal direction. It is the figure which showed another form of the joining structure of a bone member, and is sectional drawing (a) and the top view (b) which looked at the longitudinal bone in the longitudinal direction. It is the perspective view which showed what used the joint member in the junction part of the bone member. It is the surface figure which showed the side structure of the railway vehicle. It is the figure which showed the framework joined to the outer plate | board. It is the figure which showed the conventional joining structure of a longitudinal bone and a horizontal bone.

Explanation of symbols

11 Outer plate 12, 13 Side column 14 Lumbar 15 Curtain band member 16 Lumbar band members 17, 18 Reinforcement bones 12a, 17a Intermediate surfaces 12b, 17b Standing surfaces 12c, 17c Flange surface B Welding bead

Claims (7)

In a railway vehicle provided with a skin plate joined with a frame composed of vertical and horizontal bones,
The vertical bone and the horizontal bone are standing surfaces that are in an upright state with respect to the joined outer plates, the joining surfaces that are bent in opposite directions across the standing surfaces, and the joining surfaces that are joined to the outer plates; A bone member having a joint surface that floats from the outer plate, and in the framework in which the joint surface of the bone member is joined to the outer plate, the end of the transverse bone is between the joint surface of the longitudinal bone and the outer plate. A railway vehicle characterized in that the joint surfaces of the longitudinal bone and the lateral bone that are in contact with each other and are in surface contact are joined to each other. In a railway vehicle provided with a skin plate joined with a frame composed of vertical and horizontal bones,
The longitudinal bone and the transverse bone are bone members formed with an intermediate surface, an upright surface bent at both ends in the width direction of the intermediate surface, and a flange surface further bent outward from the upright surface. In the framework where the members are joined to the outer plate, the intermediate surface of the longitudinal bone is joined to the outer plate, and the end of the horizontal bone enters between the flange surface of the longitudinal bone and the outer plate, and the flange surface or intermediate surface A rail vehicle in which the flange surface of the longitudinal bone and the intermediate surface or flange surface of the lateral bone that are in surface contact with each other are joined to the outer plate. In the railway vehicle according to claim 1 or 2,
The longitudinal vehicle and / or the horizontal bone is a railway vehicle in which the joint surface or the flange surface is formed only at a joint portion to be joined to each other. In the railway vehicle according to any one of claims 1 to 3,
The frame is laser welded to the outer plate, and the vertical bone has a laser beam in a width direction in which the joint surface or the intermediate surface thereof is in the same direction as the finish line on the finished surface side of the outer plate. A railway vehicle characterized by being sent and welded. In the railway vehicle according to claim 4,
A rail vehicle in which a plurality of laser weldings in a longitudinal direction are performed on the joint surface or the intermediate surface of the longitudinal bones so as to obtain a joint strength to the outer plate. In a frame welding method for laser welding a frame consisting of vertical and horizontal bones to the outer plate of a railway vehicle structure,
The vertical bone and the horizontal bone are standing surfaces that are in an upright state with respect to the joined outer plates, the joining surfaces that are bent in opposite directions across the standing surfaces, and the joining surfaces that are joined to the outer plates; A bone member having a joint surface floating from the outer plate,
The longitudinal bone is welded by sending a laser beam in the width direction along the finish of the outer plate to the joint surface in surface contact with the outer plate, and the horizontal bone is joined to the joint surface in surface contact with the outer plate. A frame joining method characterized by performing welding by sending a laser beam in the longitudinal direction along the finish of the outer plate. In the frame joining method according to claim 6,
A frame joining method characterized in that a plurality of laser weldings in the longitudinal direction are performed on the joining surfaces of the longitudinal bones in such a number that the joining strength to the outer plate is obtained.

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