JP5970587B2 - Manufacturing method of railway vehicle structure - Google Patents

Description

  The present invention relates to a method for manufacturing a railway vehicle structure.

  As a structure for installing interior parts such as a switchboard and an air conditioner in a railway vehicle structure, a suspension bolt fixing structure that uses a bolt in a suspension groove is conventionally known. In this conventional suspension bolt fixing structure, a suspension groove fixed to a vehicle roof structure or the like is used as a support member, and for example, a fitting is provided via a special bolt formed by protruding a screw portion on a substantially rectangular parallelepiped head. Fixed.

  In such a fixing structure, it is necessary to prevent rotation of the bolt and to prevent it from rising. Therefore, in the case of a railroad vehicle structure made of stainless steel, for example, as shown in Patent Document 1, it has left and right outer plate portions having a Z-shaped cross section and a connecting plate portion that connects the outer plate portions having a U-shaped cross section. The support member is formed by roll forming or the like and fixed to a rafter or the like on the roof. In this support member, the top surface of the connecting plate portion is formed closer to the flange inside the outer plate portion, and the bolt head side faces the inner surface of the connecting plate portion, thereby preventing rotation, and the bolt head. The top stop is realized by the top surface of the part hitting the top surface of the connecting plate part.

  In the case of an aluminum railcar structure, for example, as shown in Patent Document 2, a rail formed by extrusion molding or the like integrally with a double skin panel is formed. A protrusion (barbing) is formed on the inner side surface of this rail, and the detent is achieved by the head side surface of the bolt hitting the inner side surface of the rail, and the top surface of the bolt head hits the protruding portion. Raising stop is realized.

JP 2007-137217 A JP 2001-171515 A

  By the way, in a rail vehicle, it is also assumed that an internal fitting is attached in places other than the above-mentioned roof structure. Therefore, when an attempt is made to provide a hanging groove on a flat plate without a rafter or a double skin panel, for example, as shown in FIG. A separate member needs to be attached to the flat plate 101, and an increase in weight and an increase in the number of parts are problematic.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a method of manufacturing a railway vehicle structure capable of realizing the suspension bolt fixing of the internal fitting with a simple configuration.

  In order to solve the above-described problems, a method for manufacturing a railway vehicle structure according to the present invention is a method for manufacturing a railway vehicle structure including a mounting structure forming step of fixing a bolt for mounting an interior product on a flat plate constituting the railway vehicle structure. In the method, the fitting structure forming step includes a head having a substantially rectangular parallelepiped shape, an engagement step formed on a bottom surface side of the head, and a screw portion protruding from the engagement step. A bolt preparation step for preparing a plate, a flat plate preparation step for preparing a flat plate provided with a long hole having a width through which the head can pass, and a flat plate so that a space narrower than the width of the long hole is formed on the long hole. A plate spring joining step in which a pair of leaf springs are overlapped and joined to one surface side, and the head of the bolt is passed between the elongated hole and the leaf spring from the other surface side of the leaf spring, and the direction of the head is rotated, And a bolt engaging step for engaging the edge of the spring with the engaging step of the bolt. It is set to.

  In this method for manufacturing a railway vehicle structure, the head portion of the bolt is passed between the elongated hole and the leaf spring, and the edge of the leaf spring is engaged with the engagement step portion of the bolt. Thereby, since the elastic force by a leaf | plate spring acts on an engagement step part, the rotation prevention of a volt | bolt and a raising stop are implement | achieved at once, without providing large sized separate members, such as a hat material, in a flat plate.

  Moreover, it is preferable to further include a washer attachment step of attaching the washer to the screw portion of the bolt. With the washer, it is possible to more reliably prevent the bolt from rising.

  Further, it is preferable that the width of the head is formed larger than the interval between the leaf springs. In this case, when the head of the bolt passes between the leaf springs, the edge of the leaf spring is caught on the head and deforms to one side, and when the bolt head passes completely between the leaf springs, the edge of the leaf spring Engages the engaging step. Therefore, the edge of the leaf spring is firmly engaged with the engaging step portion, and the rotation prevention and the rise prevention of the bolt can be realized more reliably.

  According to the present invention, it is possible to realize the suspension bolt fixing of the inner equipment with a simple configuration.

It is a perspective view which shows an example of the rail vehicle which applies the manufacturing method of the rail vehicle structure which concerns on this invention. It is a perspective view which shows the suspension bolt fixing structure formed using the reference example of the manufacturing method of the railway vehicle structure which concerns on this invention. It is a perspective view which shows an example of the volt | bolt used for a suspension bolt fixing structure. It is sectional drawing which shows an example of a flat plate preparation process. It is sectional drawing which shows an example of the front | former stage of a bolt preparation process and a bolt engagement process. It is sectional drawing which shows an example of the back | latter stage of a bolt engagement process. It is a perspective view which shows the suspension bolt fixing structure formed using 2nd Embodiment of the manufacturing method of the railway vehicle structure which concerns on this invention. It is sectional drawing which shows an example of a flat plate preparation process and a leaf | plate spring joining process. It is sectional drawing which shows an example of the front | former stage of a bolt preparation process, a washer attachment process, and a bolt engagement process. It is sectional drawing which shows an example of the back | latter stage of a bolt engagement process. It is sectional drawing which shows the comparative example of a suspension bolt fixing structure.

  Hereinafter, a preferred embodiment of a method for manufacturing a railway vehicle structure according to the present invention will be described in detail with reference to the drawings.

  First, the railway vehicle structure will be described. FIG. 1 is a perspective view showing an example of a railway vehicle to which the method for manufacturing a railway vehicle structure according to the present invention is applied. As shown in the figure, the railway vehicle structure 1 includes a floor structure 2, a side structure 3, a roof structure 4, and a wife structure 5, and these structures are joined to each other, thereby It has a box shape with a space to accommodate it inside.

  The floor structure 2 is disposed at the bottom of the railway vehicle structure 1 as a structure constituting the floor of the vehicle. Various underfloor devices such as a power supply device and a brake control device are attached to the lower portion (under the floor) of the floor structure 2. The side structure 3 and the wife structure 5 are erected so as to surround the left and right edges and the front and rear edges of the floor structure 2 as structures constituting the side part of the vehicle. The side structure 3 is provided with a plurality of door portions 6 (for example, three locations) at equal intervals for passengers / occupants to get on and off.

  In addition, window portions 7 are provided between the door portions 6 and 6 and at both ends of the side structure 3. The wife structure 5 is provided with an entrance / exit 8 for passengers / occupants to move between vehicles. The roof structure 4 is arranged so as to cover the space above the structure of the railway vehicle as a structure constituting the roof portion of the vehicle. The roof structure 4 of the vehicle is provided with an air conditioner, a pantograph (not shown), and the like for adjusting the temperature inside the vehicle.

[Reference example]
In the railway vehicle structure 1 described above, a suspension bolt fixing structure for laying out interior parts such as a switchboard, an air conditioner, a support member for hanging leather, or a support member for attaching a hanging advertisement is provided. FIG. 2 is a perspective view showing a suspension bolt fixing structure formed using a reference example of a method for manufacturing a railway vehicle structure according to the present invention.

  As shown in FIG. 1, the suspension bolt fixing structure 11 according to the reference example includes a bolt 12 and a flat plate 13. As shown in an enlarged view in FIG. 3, the bolt 12 includes a substantially rectangular parallelepiped head 21, a flat engagement step portion 22 formed in a central portion on the bottom surface side of the head portion 21, and an engagement step portion 22. And a protruding screw portion 23. The height of the engaging step portion 22 is, for example, about twice the thickness of the flat plate 13, and the length and width of the engaging step portion 22 are substantially equal to the width of the head portion 21. .

  The flat plate 13 is formed of, for example, mild steel and has a thickness of about 0.4 mm, and is fixed to the side structure 3 or the roof structure 4 on the indoor side of the railway vehicle structure 1. The flat plate 13 is formed with a convex portion 31 having a trapezoidal cross section that protrudes toward the outside of the railway vehicle structure 1. The convex portion 31 extends linearly, for example, along the longitudinal direction of the railway vehicle structure 1.

  In addition, elongated holes 32 extending along the direction in which the protrusions 31 are formed are formed at a predetermined interval in a substantially central portion of the top 31 a of the protrusions 31. The length of the long hole 32 is, for example, about 50 mm. The width of the long hole 32 is substantially the same as the width of the head 21 of the bolt 12, but is smaller than the length of the head 21 in the longitudinal direction.

  In this suspension bolt fixing structure 11, in the flat plate 13, the width of the top portion 31 a of the convex portion 31 substantially matches the length in the longitudinal direction of the head portion 21 of the bolt 12, and the width of the long hole 32 is the head portion of the bolt 12. 21 substantially coincides with the width of the engagement step portion 22 and the length of the engagement step portion 22 in the longitudinal direction. The bolt 12 is arranged so that the screw portion 23 protrudes from the elongated hole 32 to the indoor side, and the convex portion 31 is formed with a concave portion 31 b that is recessed toward the indoor side around the bolt 12. By forming the recess 31b, the edge 32a of the elongated hole 32 is engaged with the side surface 22a in the longitudinal direction of the engagement step portion 22, and the bolt 12 and the flat plate 13 are fixed. The screw portion 23 protruding from the long hole 32 is passed through the screw insertion hole 14 a (see FIG. 6) of the interior product 14. Then, the interior part 14 is fixed to the suspension bolt fixing structure 11 by screwing the nut 15 into the tip of the screw part 23.

  In forming the suspension bolt fixing structure 11, first, a flat plate 13 is prepared as shown in FIG. In the flat plate 13 at the preparation stage, the convex portion 31 is formed without the concave portion 31b. The convex portion 31 extends linearly, for example, along the longitudinal direction of the railcar structure 1, and a long hole 32 extending along the direction in which the convex portion 31 is formed is provided at a substantially central portion of the top portion 31 a of the convex portion 31. It is formed in advance with an interval of.

  Next, as shown in FIG. 5, the bolt 12 is prepared, and the head 21 is moved from the back side of the convex portion 31 so that the extending direction of the long hole 32 and the longitudinal direction of the head 21 of the bolt 12 are matched. Pass through. After passing the head 21 through the convex portion 31, the direction of the head 21 is rotated by about 90 °, and the longitudinal direction of the head 21 of the bolt 12 is orthogonal to the direction in which the long hole 32 extends. After rotating the head 21, the head 21 is hooked on the edge 32 a of the long hole 32 with the screw portion 23 protruding from the long hole 32.

  Thereafter, as shown in FIG. 6, the interior product 14 is prepared, the screw portion 23 is passed through the screw insertion hole 14 a of the interior product 14, and the nut 15 is screwed to the tip portion to perform tightening. By this tightening, the bolt 12 is pulled to the screw portion 23 side while the head 21 is hooked on the edge 32 a of the long hole 32, and a part of the convex portion 31 gradually moves to the opposite side of the flat plate 13 around the bolt 12. Deforms into a recess 31b.

  At this time, the width of the long hole 32 is slightly narrowed due to the deformation of the convex portion 31, and the edge 32 a of the long hole 32 is changed to bite into the side surface 22 a in the longitudinal direction of the engagement step portion 22 of the bolt 12. Accordingly, the rotational movement and the axial movement of the bolt 12 are restricted by the edge 32a of the long hole 32, and the bolt 12 is prevented from rotating and rising without providing a large separate member such as a hat material on the flat plate 13. And is realized at once.

[Second Embodiment]
FIG. 7 is a perspective view showing a suspension bolt fixing structure formed by using the second embodiment of the method for manufacturing a railway vehicle structure according to the present invention. As shown in the figure, the suspension bolt fixing structure 41 according to the second embodiment includes a bolt 12, a flat plate 13, and a pair of plate springs 42 and 42. The bolt 12 has the same configuration as that of the reference example, but the length of the engagement step portion 22 is slightly shorter than the width of the head portion 21 and is substantially the same as the interval between leaf springs 42 and 42 described later. It is equivalent. Moreover, about the flat plate 13, although the long hole 32 is formed with the predetermined space | interval, the convex part 31 is not formed unlike the reference example.

  On the other hand, the leaf spring 42 is formed of a member that is thinner than the flat plate 13 and easily deforms. As the material of the leaf spring 42, for example, a stainless steel strip for leaf spring (JIS standard SUS301-CSP, SUS304-CSP, etc.) is used. In this embodiment, the thickness of the flat plate 13 is, for example, 3.2 mm, and the thickness of the leaf spring 42 is, for example, 0.40 mm to 0.45 mm. The leaf springs 42 and 42 are respectively overlapped on one surface side of the flat plate 13 so that an interval narrower than the width of the elongated hole 32 is formed on the elongated hole 32, and is formed on the edge opposite to the elongated hole 32. The plurality of spot welds W are joined to the flat plate 13.

  In this suspension bolt fixing structure 41, the width of the long hole 32 in the flat plate 13 substantially matches the width of the head 21 of the bolt 12, and the distance between the leaf springs 42, 42 is the width of the head 21 of the bolt 12. It is narrower than that and substantially equal to the length of the engagement step portion 22 in the longitudinal direction. In the bolt 12, the edge 42 a of the leaf spring 42 is the length of the engagement step portion 22 with the head portion 21 protruding from between the leaf springs 42 and 42 and the screw portion 23 protruding from the long hole 32 to the indoor side. It is fixed to the leaf spring 42 by engaging the directional side surface 22a. The screw portion 23 protruding from the long hole 32 is passed through the screw insertion hole 14a (see FIG. 10) of the interior product 14. Then, the interior product 14 is fixed to the suspension bolt fixing structure 41 by screwing the washer 43 and the nut 15 into the distal end portion of the screw portion 23.

  In forming the suspension bolt fixing structure 41, first, as shown in FIG. 8, the flat plate 13 is prepared. Further, the plate springs 42 and 42 are prepared, and the plate springs 42 and 42 are arranged on the one surface side of the flat plate 13 so that an interval narrower than the width of the long hole 32 is formed on the long hole 32. Then, a plurality of spot welds W are formed at the edge opposite to the long hole 32 to join the leaf spring 42 to the flat plate 13.

  Next, as shown in FIG. 9, the bolt 12 is prepared, and the head 21 is placed on the other surface side of the flat plate 13 such that the direction in which the elongated hole 32 extends and the longitudinal direction of the head 21 of the bolt 12 are matched. From the long hole 32 and the leaf springs 42, 42. At this time, the interval between the leaf springs 42 and 42 is narrower than the width of the head portion 21 of the bolt 12, but when the head portion 21 of the bolt 12 passes between the leaf springs 42 and 42, the leaf spring 42. Since the edge 42a is hooked on the head 21 and elastically deforms to one side, the head 21 can be passed between the leaf springs 42, 42.

  Next, the head portion 21 and the engaging step portion 22 of the bolt 12 are completely passed between the leaf springs 42, 42, and the direction of the head portion 21 is rotated by about 90 °. Then, when the bolt 12 is slightly returned to the one surface side, the edge 42a of the leaf spring 42 bites into the longitudinal side surface 22a of the engagement step portion 22 of the bolt 12 as shown in FIG. Therefore, the rotational movement and the axial movement of the bolt 12 are restricted by the edge 42a of the leaf spring 42, and the bolt 12 is prevented from rotating and rising without providing a large separate member such as a hat material on the flat plate 13. And is realized at once.

  Thereafter, the interior product 14 is prepared, the screw portion 23 is passed through the screw insertion hole 14a of the interior product 14, and the washer 43 and the nut 15 are screwed to the tip portion and tightened. As a result, the interior article 14 is fixed to the suspension bolt fixing structure 41. The washer 43 more reliably prevents the bolt 12 from rising.

  DESCRIPTION OF SYMBOLS 1 ... Railway vehicle structure, 12 ... Bolt, 13 ... Flat plate, 14 ... Interior goods, 21 ... Head, 22 ... Engagement step part, 23 ... Screw part, 31 ... Convex part, 32 ... Long hole, 32a ... Long hole 42 ... leaf spring, 42a ... leaf spring edge, 43 ... washer.

Claims (3)

A method for manufacturing a railway vehicle structure, comprising a fitting structure forming step for fixing a bolt for fitting an interior product on a flat plate constituting the railway vehicle structure,
The outfitting structure forming step includes
A bolt preparation step of preparing a bolt having a substantially rectangular parallelepiped head, an engagement step formed on a bottom surface side of the head, and a screw portion protruding from the engagement step;
A flat plate preparation step of preparing a flat plate provided with a long hole having a width through which the head can pass;
A leaf spring joining step of superposing and joining a pair of leaf springs on one side of the flat plate so that an interval narrower than the width of the elongated hole is formed on the elongated hole;
The head of the bolt is passed between the elongated hole and the leaf spring from the other surface side of the flat plate , the orientation of the head is rotated, and the edge of the leaf spring is engaged with the engagement step portion of the bolt. A method of manufacturing a railway vehicle structure, comprising: a bolt engaging step to be combined.   The method for manufacturing a railway vehicle structure according to claim 1, further comprising a washer attachment step of attaching a washer to the screw portion of the bolt.   3. The method for manufacturing a railway vehicle structure according to claim 1, wherein the width of the head is formed larger than the interval between the leaf springs.

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