JP4484539B2 - Railcar side structure - Google Patents

Description

  The present invention relates to a side structure of a railway vehicle, and more particularly to a side structure of a commuter railway vehicle having many openings.

  2. Description of the Related Art Aluminum alloy structures (hereinafter referred to as aluminum structures) are known as structures in domestic commuter rail vehicles.

  In such an aluminum structure, extruded sections having large cross sections are used, and MIG welding and friction stir welding (hereinafter referred to as FSW) are used in combination as means for joining them.

  Specifically, for example, as shown in FIG. 7, a vertical panel member 103 (103 a, 103 b) before extending in the vehicle vertical direction between the eaves long member 101 extending in the longitudinal direction of the vehicle body and the side beam 102 of the underframe. ) And the rear vertical panel member 104 (104a, 104b) and the lower portions of the front and rear vertical panel members 103, 104 are joined by a horizontal panel member 105 (105a, 105b) extending in the front-rear direction. Thus, the side structure 106 having the door opening S11 and the window opening S12 is formed. In this case, the joining line L11 between the members 103a and 103b of the front vertical panel member 103, the joining line L12 between the members 104a and 104b of the rear vertical panel member 104, and the joining between the members 105a and 105b of the horizontal panel member 105 are performed. The line L13 is joined by FSW (automation), but the joining lines L14 and L15 between the eaves portion long material 101 and the front and rear vertical panel members 103 and 104, the front and rear vertical panel members 103 and 104, and the horizontal panel member 105 and the side beam 102, and the longitudinal joining lines L17 and L18 between the front and rear vertical panel members 103 and 104 and the lateral panel member 105 are joined by MIG welding (manual operation).

  As described above, since MIG welding is frequently used in the conventional side structure, joint quality such as suppression of welding defects such as blowholes and uniform welding beads is left to the operator's ability. However, there is a demand for ensuring a certain level of quality. In the case of an unpainted car body, the welded part is particularly noticeable, and the demand is further increased.

  Therefore, it is conceivable to apply the FSW to the entire side structure. In this way, the quality is not entrusted to the operator by automating with the FSW, and high precision and high quality can be created at the time of joining work, and correction work such as distortion removal can be reduced.

  By the way, conventionally, a structure of a railway vehicle using an extruded shape member (hollow shape member) having a double skin structure is known (see, for example, Patent Documents 1 and 2).

As shown in FIG. 8, an all-double skin side structure 201 in which all extruded shapes are arranged in the longitudinal direction of the vehicle body is also known in the prior art for full-surface FSW.
JP 2000-351365 (paragraph numbers 0009 to 0012 and FIG. 1) JP 2002-178913 A (paragraph numbers 0007 to 0918 and FIG. 1)

  In such an all-double skin type side structure, in general, the yield of the material is poor, and in addition, there is a lot of waste in terms of structure and strength, the material cost is greatly increased, and the weight of the structure is increased. Also, in the all double skin type side structure, there is a joint line by FSW on both the front and back sides, and it is necessary to retrofitting a vertical sword structure at the opening end of the side doorway / side window. Bone members perpendicular to the material must also be retrofitted. Therefore, there are many joint lines, which directly leads to a decrease in quality and an increase in cost. Therefore, there is no merit in commuting type vehicles with many side openings.

  Therefore, the inventor has made the present invention that enables all the shapes to be joined by FSW based on the shape arrangement pattern as shown in FIG. 7 with the best yield. Here, it is necessary to join the joining lines where the shape members intersect in a T shape by FSW. In the conventional structure, the FSW is applied only to the vertical joining lines L11 and L12 of the front and rear vertical panel members 103 and 104 and the horizontal joining line L13 of the horizontal panel member 105. However, (i) the horizontal joining lines L14 and L15 between the eaves portion elongate member 101 and the vertical panel members 103 and 104, and (ii) the vertical panel members 103 and 104 and the horizontal panel member 105 and the frame side beam 102. FSW cannot be applied to the three joining lines L16 and Liii, and (iii) the longitudinal joining lines L17 and L18 between the vertical panel members 103 and 104 and the horizontal panel member 105. In the present invention, FSW can be applied to the portions (i) to (iii).

The invention according to claim 1 is a long eaves material that extends in the longitudinal direction of the vehicle body and is joined to a side edge of the roof structure, a long elongate material that extends in the longitudinal direction of the vehicle body and is joined to the side beam of the underframe, and a vehicle vertical direction. Front and rear vertical panel members that connect the eaves long material and the skirt long material to each other with a space in the longitudinal direction of the vehicle body, and the eaves long material, the hem long material, and the front and rear vertical panel members, A side structure of a railway vehicle in which a side entrance / exit opening is formed, and the elongate portion elongate member, the hem portion elongate member, and the front and rear vertical panel members are connected to each other by an outer side plate portion and an inner side plate portion by a web. It is an extruded shape member of a double skin structure, and the outer surface plate portion of the eaves portion long material or the hem portion long material is formed with an extended portion extending downward or upward corresponding to the front and rear vertical panel members, The extension is applied to the outer side plate portion of the front and rear vertical panel members. Corresponding to the portion, another extension is formed to extend upward or downward, the two extension portions are joined from inside by friction stir welding, said two extension portions, the eaves director elongated member and the skirt director scale member, Formed by cutting a part of the front and rear vertical panel members by cutting, a closing member having a closed cross-section structure extending in the joining line direction and filling a portion removed by the cutting is formed inside the joint portion of the two extension portions. It is provided .

If it does in this way, also the part of (i)-(iii) mentioned above can pass the joining tool of a FSW machine, and joining by FSW is realized. Specifically, for example, a part perpendicular to the joining line is removed (for example, by cutting) while leaving the outer face plate part (for example, by cutting), and a shape parallel to the joining line is outside. The cross-sectional shape of the shape is formed by extending (for example, 20 to 30 mm) only the face plate portion, and a groove through which the joining tool can pass is formed between the two shapes to be joined. Thus, joining by FSW is enabled (see FIG. 2).
Moreover, it becomes possible to supplement an out-of-plane bending rigidity by providing a closing member. Further, since the rigidity of the joint portion can be controlled by adjusting the shape and dimensions of the closing member, it is possible to eliminate structural and strength waste.

In this case, as described in claim 2, the closing member has a triangular cross section and is joined to the contact plate portion joined to the end face of the vertical panel member and the step portion of the eaves portion long material. A configuration having a contact plate portion can be employed.

  Further, as described in claim 3, the eaves portion long material and the hem portion long material have a cutout portion that constitutes a part of the upper side and the lower side of the side entrance opening, and the cutout portion Is formed by cutting out the extruded shape member, and a corner portion of the side entrance opening may be closed by a closing plate member.

  In this way, the MIG welded portion between the members is not located at the corner portion of the side entrance opening where the stress is concentrated, and the fatigue strength is excellent. That is, in the conventional structure, as shown in FIG. 9, in order to avoid MIG welding at the corner portion, the corner portion of the vertical panel member is cut out, and the corner reinforcing member 301 (separate part) which is a forged product is attached by MIG welding, It was designed to withstand stress concentration. In such a case, since the appearance is impaired by the weld bead and the weld distortion, a work for finishing the weld bead and a work for correcting the weld distortion have been required. Therefore, it is possible to reduce useless work by forming a notch portion that constitutes a part of the side entrance opening portion by machining (cutting) on the eave portion long material and the skirt long material. Become.

  According to a fourth aspect of the present invention, the elongate elongate member is integrally formed with a horizontally extending portion extending inward of the vehicle body, and the inner side plate portion of the lower end edge of the lower panel member is a side beam. It is desirable that the lower part is joined by welding, and the horizontal extension part is joined by welding to the upper part of the side beam.

  In this way, the side beam of the side structure (hem long material) needs to be connected to the side beam by MIG welding. By performing (fillet) welding of the inner side plate portion to the lower portion of the side beam, the MIG welding bead does not appear on the surface, and the finishing work of the welding bead becomes unnecessary. All the side structures that can be seen from the outside of the vehicle are advantageous in realizing that they are joined and assembled by FSW.

  According to a fifth aspect of the present invention, it is desirable that the lower edge portion of the long skirt material has an outer side plate portion extending below the inner side plate portion.

  If it does in this way, the welding part of an inner surface board part and a side beam will be reliably concealed in an outer surface board part.

  According to a sixth aspect of the present invention, a rail member is provided on the extended portion of the long hem portion so that the lower portion of the side sliding door is movably engaged in a portion corresponding to the side doorway opening. It is desirable.

  In this way, since the long skirt material includes the mounting surface of the rail member (of the side sliding door), the entire operating range of the side sliding door is included in the side structure block. Therefore, the operating range of the side sliding door can be assembled with high accuracy in one step, and the quality of the function of the side sliding door can be improved.

The above-described structure can be applied not only to the periphery of the side entrance opening but also to the periphery of the window opening. The invention according to claim 7, which is a structure applied to the periphery of the window opening, is joined to the eaves long member extending in the longitudinal direction of the vehicle body and joined to the side edge of the roof structure, and to the side beam of the frame extending in the longitudinal direction of the vehicle body. Hem long material, front and rear vertical panel members extending in the vehicle up-down direction and connecting the eaves long material and the hem long material at intervals in the vehicle longitudinal direction, and lower portions of the front and rear vertical panel members A lateral panel member that interconnects the eaves portion, the eaves portion elongate member, the hem portion elongate member, the front and rear longitudinal panel members, and the lateral panel member. The eaves portion elongate member, the hem portion elongate member, the front and rear vertical panel members, and the horizontal panel member are extruded shapes having a double skin structure in which an outer side plate portion and an inner side plate portion are coupled by a web. The outer face plate part of the long member is the longitudinal panel Corresponding to the material, a first extension portion extending downward is formed, while a second extension portion corresponding to the first extension portion is formed on the outer surface plate portion of the front and rear vertical panel members, The outer side plate portion of the long skirt material is formed with a third extending portion extending upward corresponding to the front and rear vertical panel members and the horizontal panel member, while the outer side plate portion of the front and rear vertical panel members. A fourth extension portion is formed corresponding to the third extension portion, and an outer surface plate portion of the front and rear vertical panel members is a fifth extension extending rearward or forward corresponding to the horizontal panel member. While a portion is formed, a sixth extension portion is formed on the outer face plate portion of the horizontal panel member corresponding to the fifth extension portion, and the first extension portion, the second extension portion, and the third extension portion are formed. An extension portion and a fourth extension portion, a fifth extension portion and a sixth extension portion, Each of them is joined from the inside by friction stir welding, and the first extension part and the second extension part, the third extension part and the fourth extension part, and the joint part of the fifth extension part and the sixth extension part. The inside is provided with a closing member having a closed cross-sectional structure extending in the joining line direction .

  Since the present invention is configured as described above, the entire visible range of the passenger is usually joined by FSW, so that the quality of the outer plate is improved and the finishing and distortion removal of the weld bead that has been conventionally required is improved. Secondary work such as can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 and 2 show a side structure of a railway vehicle according to the present invention, FIG. 1 is a perspective view, and FIG. 2 is a cross-sectional view taken along line II-II in FIG.

  As shown in FIGS. 1 (a) and 1 (b), a side structure 1 of a railway vehicle includes an eaves long member 2 that extends in a longitudinal direction of the vehicle body and is joined to a side edge of a roof structure (not shown), and a longitudinal direction of the vehicle body. The hem long material 4 extending to the side frame 3a of the underframe 3 and the eaves long material 2 and the hem long material 4 extending in the vehicle vertical direction are connected to each other at intervals in the vehicle longitudinal direction. And vertical panel members 5 and 6 (door pocket panel members). In this way, when the long hem 4 is taken into the side structure block and assembled integrally, it is possible to assemble the entire visible range of the normal passenger by the FSW as will be described later.

  And the side entrance opening S1 is formed surrounded by the eaves part long material 2, the bottom part long material 4, and the front and rear vertical panel members 5 and 6.

  The eaves portion long material 2, the hem portion elongate material 4, the front and rear vertical panel members 5, 6 and the horizontal panel member 7 are also provided. A side window opening S2 is formed surrounded by.

  The eaves part long material 2 and the skirt part long material 4, the front and rear vertical panel members 5, 6 and the horizontal panel member 7 have an outer side plate part, an inner side plate part, and a web part for connecting them, and a hollow part. This is a hollow extruded shape having a double skin structure extending in the longitudinal direction of the vehicle body. The eaves long material 2 and the skirt long material 4 have a hollow portion extending in the vehicle longitudinal direction, the front and rear vertical panel members 5 and 6 have a hollow portion extending in the vehicle vertical direction, and the horizontal panel member 7 has a hollow portion. Extends in the vehicle longitudinal direction.

  The front and rear vertical panel members 5 and 6 are formed by joining two members 5A, 5B, 6A and 6B with a known joint structure by friction stir welding. A door-end column portion 5d is integrally formed with the member 5A, and a door-end column portion 5e is integrally formed with the member 5B (see FIG. 4).

  The horizontal panel member 7 is also formed by joining two members 7A and 7B with a known joint structure by friction stir welding. Further, since the hollow portion extends in the longitudinal direction of the vehicle body, both the long skirt material 4 and the horizontal panel member 7 (member 7B) are joined by a known joint structure by friction stir welding.

  Further, since the eaves portion long member 2 and the vertical panel member 5 (or 6) are different in the extending direction of the hollow portion (that is, they are orthogonal to each other), a conventionally well-known joint structure cannot be adopted. 3 is configured. That is, the eaves part long material 2 is removed by removing the inner side plate part 2b and the web 2c by cutting corresponding to the width of the vertical panel member 5 (members 5A and 5B), and leaving only the outer side plate part 2a. A first extending portion (for example, L1 = 20 to 30 mm) extending is formed. On the other hand, the inner panel 5b and the web 5c are also removed from the vertical panel member 5 by cutting, leaving only the outer panel 5a, so that a second extension (for example, L2 = 20˜) corresponds to the first extension. 30 mm) is formed. And the front-end edge of the 1st and 2nd extension part is faced | matched, and the butted part is joined from the inner side by friction stir welding.

  By doing in this way, the groove | channel (space part) which moves the rotary tool T for friction stir welding along the joining line L can be formed between the end surfaces of the two members 2 and 5 (or 6). It becomes possible to join by friction stir welding.

A closing member 11 (a member having a closed cross-sectional structure) extending in the joining line direction is provided on the inner side of the joining portion of the first and second extension portions (outer side plate portions 2a and 5a). The closing member 11 includes a contact plate portion 11a that contacts the end surface of the vertical panel member 5, and a contact plate portion 11b that contacts the step portion 2d of the eaves portion long member 2. The contact plate portion 11a It joins by MIG welding in a site | part with the contact plate part 11b. Since this part is not visible from the outside, the appearance is not impaired. The closing member 11 can be omitted as necessary (in the case where rigidity is not particularly required).

  In addition, the joining of the eave part long material 2 and the vertical panel member 6, the joining of the skirt long material 4 and the front and rear vertical panel members 5 and 6, and the front and rear vertical panel members 5 and 6 and the horizontal panel member 7 The joining is also performed by friction stir welding, similarly to the joining of the eaves long member 2 and the vertical panel member 5.

  In the eaves part long material 2 and the bottom part long material 4, corresponding to the part where the side entrance / exit opening S <b> 1 is provided, the notch part 2 </ b> A constituting a part of the upper part and the lower part of the side entrance / exit opening part S <b> 1, 4A is formed (see FIG. 1). The notches 2A and 4A are formed by cutting out the eaves long material 2 and the skirt long material 4 which are extruded shapes.

  Therefore, unlike the conventional case, the corner portion of the side entrance / exit opening S1 where stress is likely to concentrate is configured as a part of the eaves long material 2 and the skirt long material 4 as shown in FIGS. In addition, since the MIG weld is not included, the fatigue strength is excellent. In addition, the corner part of the said side entrance opening part S1 is obstruct | occluded with the closing board member 12, and it does not impair the appearance.

  Further, as shown in FIG. 4, the first and second extended portions are also formed on the inner side of the joint portion between the vertical panel member 5 and the hem long member 4 and the joint portion between the vertical panel member 5 and the horizontal panel member 7. The closed members 11A and 11B having a closed cross-sectional structure are provided in the same manner as the joined portion of the (outer face plate portions 2a and 5a), that is, the joined portion of the eaves long member 2 and the vertical panel member 5.

  Further, as described above, the hem long material 4 is an extruded shape having a double skin structure in which the hollow portion extends in the longitudinal direction of the vehicle body. However, as shown in FIG. A body portion 4e extending upward from the surface) and an extension portion 4f extending from the body portion 4e toward the vehicle body inward are integrally formed.

  The extended portion 4f includes a thick horizontal portion 4fa extending inward in the horizontal direction from the main body portion 4e extending in the vertical direction, and an inclined portion 4fb connecting the lower side of the horizontal portion 4fa and the main body portion 4e. The And the front-end | tip part (lower surface side) of the extension part 4f (horizontal part 4fa) is joined to the step part 3b of the upper part of the side beam 3a by MIG welding.

  Of the extended portion 4f, in the portion corresponding to the door opening S1 (side entrance opening), a side sliding door (not shown) is opened and closed on the extended portion 4f (horizontal portion 4fa) of the hem long material 4. A rail member 13 that is movably guided is provided.

  On the other hand, the inner side surface plate portion 4b at the lower end edge of the main body portion 4e (the long hem portion 4) has a protruding portion 4g protruding inward of the vehicle body, and the lower side of the side beam 3a at the protruding portion 4g. It is joined to the portion (outer surface) by MIG welding. Moreover, since the outer side face plate part 4a extends below the inner side face plate part 4b, the welded portion P is hidden by the outer side face plate part 4a.

  If comprised in this way, as shown in FIG. 3, the structure (side structure 1 which joins the side structure 1 not via the side beam of a base frame directly but as shown in FIG. 3 is joined. In a joining line where the shape members intersect in a T-shape with a long base 4 in the form of a long base as a separate part at a position connecting the beam 3a located outside the frame 3 and the side beam 3a By devising the joint structure, all the joints of the outer portion of the side structure 1 that are normally visible to the passenger can be joined by FSW. Therefore, even if it is an unpainted vehicle, an appearance is not spoiled.

  In addition, compared with the conventional side structure (all double skin structure) in which all the shapes are arranged in the longitudinal direction of the car body, there is less extra material and the material cost is lower, and the finished structure is lighter. Can be achieved. .

  Further, since the main body portion 4e of the hem long material 4 extends upward from the floor surface, as shown in FIG. 6, even if the impact force F acts due to a collision from the side, a large shear force is generated at the time of the collision. Since the base material is arranged on the floor top surface where the weld acts, not the welded portion, as shown in FIG. 10, the floor top surface is more resistant to breakage (shearing) than the structure located in the conventional welded portion. The advantage to become is also obtained.

It is a perspective view which shows the side structure of the rail vehicle which concerns on this invention. It is sectional drawing in the II-II line of FIG. It is explanatory drawing of the joint structure of an eaves part elongate material and a vertical panel member. It is a perspective view which shows the state which looked at the side structure of the rail vehicle which concerns on this invention from the inner side. (A) (b) is explanatory drawing of the corner part of a side entrance / exit opening part, respectively. It is explanatory drawing in case an impact force acts from the side. It is a perspective view which shows the side structure of the conventional railway vehicle. It is a perspective view which shows the side structure (all double skin structure) of the conventional railway vehicle. It is explanatory drawing of the corner part of the conventional side entrance opening part. It is explanatory drawing in case an impact force acts from the side about a conventional structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Side structure 2 Eaves part elongate material 2A Notch part 2a Outer side surface board part (1st extension part)
3 frame 3a side beam 4 hem long material 4A notch 5, 6 vertical panel member 5a outer side plate (second extended portion)
7 Horizontal panel member 11, 11A, 11B Closing member 12 Closing plate member S1 Door opening S2 Side window opening

Claims (7)

An eaves long material that extends in the longitudinal direction of the vehicle body and is joined to the side edge of the roof structure, a long hem that extends in the longitudinal direction of the vehicle body and is joined to the side beam of the underframe, and the elongate long material that extends in the vehicle vertical direction And the front and rear vertical panel members that connect the long hem material to each other at intervals in the longitudinal direction of the vehicle body, and the eaves long material, the hem long material, and the front and rear vertical panel members form a side entrance opening. A side structure of a railway vehicle
The eaves part long material and the bottom part long material, the front and rear vertical panel members are extruded shapes of a double skin structure in which the outer side plate part and the inner side plate part are joined by a web,
The outer surface plate portion of the eave portion long material or the skirt long material is formed with an extended portion extending downward or upward corresponding to the front and rear vertical panel members, while the outer surface plate portion of the front and rear vertical panel members. Corresponding to the extension portion, another extension portion extending upward or downward is formed,
The two extended parts are joined from the inside by friction stir welding,
The both extended parts are formed by removing a part of the eaves part long material and the bottom part long material, front and rear vertical panel members by cutting,
Wherein the inside of the joining portions of both extension portion, the side structure of the railway vehicle closure member that provided the closed cross section which fills the removed portion by said cutting extending the welding line direction.   2. The railway according to claim 1, wherein the closing member has a triangular cross section and includes a contact plate portion joined to an end face of the vertical panel member and a contact plate portion joined to a step portion of the eaves portion long material. Side structure of the vehicle. The eaves part long material and the skirt part long material have a notch part constituting a part of the upper side and the lower side of the side entrance opening,
The side structure of a railway vehicle according to claim 1 or 2, wherein the notch is formed by cutting out the extruded shape member, and a corner portion of the side entrance opening is closed by a closing plate member. The hem long material is integrally formed with a horizontally extending portion extending inward of the vehicle body,
4. The railway vehicle according to claim 3, wherein an inner side plate portion of a lower end edge of the long hem portion is joined to a lower portion of a side beam by welding, and the horizontal extension portion is joined to an upper portion of the side beam by welding. Side structure.   The side structure of a railway vehicle according to claim 4, wherein an outer side surface plate portion extends downward from an inner side surface plate portion at a lower edge portion of the skirt long material.   The rail vehicle according to claim 4 or 5, wherein a rail member is provided on an extended portion of the long hem portion, and a rail member is movably engaged with a lower portion of the side sliding door at a portion corresponding to the side entrance opening. Side structure. An eaves long material that extends in the longitudinal direction of the vehicle body and is joined to the side edge of the roof structure, a long hem that extends in the longitudinal direction of the vehicle body and is joined to the side beam of the underframe, and the elongate long material that extends in the vehicle vertical direction And a front and rear vertical panel member that connects the long hem portion material with an interval in the longitudinal direction of the vehicle body, and a horizontal panel member that connects the lower portions of the front and rear vertical panel members to each other, the eaves portion long material, A side structure of a railway vehicle in which a side window opening is formed by a hem long material, front and rear vertical panel members and horizontal panel members,
The eaves part long material, the skirt part long material, the front and rear vertical panel members and the horizontal panel member are extruded shapes of a double skin structure in which the outer side plate part and the inner side plate part are joined by a web,
The outer surface plate portion of the eaves portion long member is formed with a first extension portion extending downward corresponding to the front and rear vertical panel members, while the first surface portion of the front and rear vertical panel members is the first extension portion. A second extension is formed corresponding to the extension of
The outer side plate portion of the long skirt material is formed with a third extending portion extending upward corresponding to the front and rear vertical panel members and the horizontal panel member, while the outer side plate portion of the front and rear vertical panel members. A fourth extension portion is formed corresponding to the third extension portion,
The outer surface plate portion of the front and rear vertical panel members is formed with a fifth extension portion extending rearward or forward corresponding to the horizontal panel member, while the fifth surface portion of the horizontal panel member is formed with the fifth surface plate portion. A sixth extension is formed corresponding to the extension,
The first extension portion and the second extension portion, the third extension portion and the fourth extension portion, the fifth extension portion and the sixth extension portion are joined from the inside by friction stir welding, respectively.
The first extension portion and the second extension portion, the third extension portion and the fourth extension portion, the inside of the joint portion of the fifth extension portion and the sixth extension portion, respectively, in the joining line direction. side structure of the railway vehicle closure member that provided the closed cross section extending.

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