Front pillar, upper member of front pillar, and method for manufacturing a front pillar

Abstract

To provide a front pillar having prevented delayed fracture, a front pillar upper member, and a method for manufacturing the front pillar.SOLUTION: A front pillar upper member 18 is constituted by overlapping an inner panel 21 with an outer panel 22, and branches into two in a vehicle longitudinal direction. The front pillar upper member 18 comprises flanges 24a1, 24a2, formed along the outer marginal part of the inner panel 21 to be joined to the outer panel 22, a stepper part 26 above the front pillar upper member 18 curved after elevating in the direction of separating from the flange 24a1 on one edge to the outer panel 22 to form a corner part, and to be connected with the flange 24a2 at the other end, a patch 23 curved along the elevation shape of the step part 26 to cover the step part 26, a swollen shape 23a of the patch 23 swelling so as to separate from the corner part of the step part 26, and an adhesive 27 filled between the patch 23 including the swollen shape 23a and the inner panel 21.SELECTED DRAWING: Figure 4

Description

Technical Field

[0001] The present invention relates to a front pillar, an upper front pillar member that constitutes a frame of a vehicle body, and a method for manufacturing the same.

Background Art

[0002] Among four-wheeled vehicles, there are vehicle types in which triangular or trapezoidal small windows are provided in the left and right front pillars respectively to secure the visibility on the side of the vehicle body. When such a vehicle undergoes, for example, a frontal collision and a large impact is applied to the front pillar, stress concentrates in the vicinity of the fork where the cross-sectional shape of the front pillar changes greatly. In particular, in vehicle types where the upper end of the small window is close to the roof, since the location where the curvature of the design shape of the front pillar becomes large and the fork portion are close to each other, it is known that stress tends to remain after press forming.

[0003] By the way, in recent years, for the purpose of weight reduction of the vehicle body and protection of passengers in a collision accident, etc., an ultra-high strength steel sheet, which is a high-strength steel sheet with a tensile strength of 980 MPa or more, may be applied to this front pillar. Generally, when this tensile strength increases, in addition to the ductility of the steel sheet decreasing, the resistance to hydrogen intrusion also decreases. In addition, hydrogen easily penetrates into the locations where stress remains due to being strongly bent by press forming as described above.

[0004] Hydrogen that penetrates into the structure of the steel sheet causes delayed fracture of the steel sheet. Delayed fracture refers to a phenomenon in which after a high-strength steel component has been subjected to a static load stress for a certain period of time, it suddenly fractures brittlely almost without accompanying plastic deformation in appearance. Hydrogen intrusion may occur, for example, when it penetrates from an electrolytic solution in which the vehicle body is immersed during the manufacture of the vehicle body, or when it is exposed to rain and snow during vehicle use. Therefore, conventionally, measures such as heat-treating the front pillar at locations where residual stress particularly concentrates in a structure using an ultra-high strength steel sheet, or forming it into a shape in which delayed fracture does not occur, have been taken.

Prior Art Documents

Patent Documents

[0005] [Patent Document 1] Japanese Patent Publication No. 2012-131334 [Overview of the project] [Problems that the invention aims to solve]

[0006] However, the conventional technologies described above had the problem of not being able to create a shape that would allow the front pillar to fully exhibit its strength and function. This is because the front pillar could only be molded to the extent that delayed fracture would not occur. In addition, when heat treatment was applied to the front pillar, dimensional deviations and changes in surface properties occurred in the heat-treated areas.

[0007] This invention was made in consideration of these circumstances, and aims to provide a front pillar, an upper front pillar member, and a method for manufacturing a front pillar that prevents delayed failure. [Means for solving the problem]

[0008] The upper front pillar member according to this embodiment consists of an inner panel and an outer panel. The upper front pillar member, which is constructed by overlapping sections and branches into two in the front-to-rear direction of the vehicle, And along the outer edge of the inner panel, the outer edge is formed on the outer panel A flange to be joined, and a direction away from the outer panel from the flange at one end. The inner part, which is raised and then bent to form a corner, is connected to the flange on the other end. A stepped portion on the surface of the panel, and a material that bends along the raised shape of the stepped portion to cover the stepped portion. A patch, and the bulging shape of the patch that bulges out so as to move away from the corner of the stepped portion, The invention comprises an adhesive that is filled between the patch, which includes the aforementioned bulging shape, and the inner panel. It is something that can be obtained. The aforementioned corner is provided with a convex bead that protrudes toward the interior of the vehicle, and the patch is It is provided so as to cover the convex bead at the location where the convex bead is positioned. Furthermore, the upper front pillar member according to this embodiment consists of an inner panel and an outer panel. The upper part of the front pillar is constructed by overlapping and branching into two in the front-to-rear direction of the vehicle. In the outer edge, the outer edge is formed along the outer edge of the inner panel. A flange that is joined to the panel, and one end of the flange that is separated from the outer panel The part that is raised in a certain direction then bends to form a corner and is connected to the flange on the other end. A stepped portion on the surface of the inner panel, and a bending along the raised shape of the stepped portion. The covering patch and the bulge shape of the patch that bulges away from the corner of the stepped portion. The shape, and the adhesive that fills the space between the patch including the bulging shape and the inner panel. , and is provided. One end face of the patch is provided on the flange and recessed outwards from the vehicle. It bends to follow the contours of the recess.

[0009] The front pillar according to this embodiment is formed by overlapping an inner panel and an outer panel, and forms the front edge of the opening for the front door of the vehicle body. In the front pillar, a window opening provided through the inner panel and the outer panel, a front pillar upper structure of the inner panel constituting the peripheral edge of the window opening, and a front pillar lower structure integrally formed with the front pillar upper structure and joined to the lower part of the vehicle body frame, a flange formed along the outer edge of the front pillar upper structure and joined to the outer panel, a stepped portion on the front pillar upper structure that bulges away from the outer panel from one side of the flange and then bends to form a corner and is connected to the flange on the other side, a patch that bends along the bulging shape of the stepped portion to cover the stepped portion, a bulging shape of the patch that bulges away from the corner of the stepped portion, and an adhesive filled between the patch including the bulging shape and the inner panel. 、前記インナーパネル及び前記アウターパネルを貫通して設けられる窓用開口部と、前記 窓用開口部の周縁部を構成する前記インナーパネルのフロントピラー上部構造と、前記フ ロントピラー上部構造に一体形成されて車体フレーム下部に接合されるフロントピラー下 部構造と、前記フロントピラー上部構造の外縁部に沿って前記外縁部に形成されて前記ア ウターパネルに接合されるフランジと、一端辺の前記フランジから前記アウターパネルか ら離れる向きに隆起した後に屈曲して角部を形成して他端辺の前記フランジに接続される 前記フロントピラー上部構造上の段差部と、前記段差部の隆起形状に沿って屈曲して前記 段差部を被覆するパッチと、前記段差部の前記角部から離れるように膨出する前記パッチ の膨出形状と、前記膨出形状を含む前記パッチと前記インナーパネルとの間に充填される 接着剤と、を備えるものである。 A convex bead is provided at the aforementioned corner, protruding toward the interior of the vehicle. The patch is provided so as to cover the raised bead at the location where the raised bead is positioned. Furthermore, in this embodiment, the front pillar consists of an inner panel and an outer panel that overlap. The front pillar, which is assembled and forms the front edge of the opening for the front door of the vehicle body. In this, a window opening is provided that penetrates the inner panel and the outer panel. , the upper front pillar structure of the inner panel that constitutes the peripheral edge of the window opening, The front pillar upper structure is integrally formed with the front pillar and joined to the lower part of the vehicle frame. The lower part of the front pillar and the upper part of the front pillar are formed along the outer edge of the front pillar. A flange joined to the outer panel, and from one end of the flange to the outer panel It bulges outwards from the flange, then bends to form a corner, connecting to the flange on the other end. The stepped portion on the upper structure of the front pillar, and the bend along the raised shape of the stepped portion A patch that covers the stepped portion, and the bulge that moves away from the corner of the stepped portion The bulging shape of the patch and the filling between the patch including the bulging shape and the inner panel The patch comprises an adhesive and the following: One end face of the patch is provided on the flange It then bends to follow the contours of the recessed area on the outside of the vehicle.

[0010] The manufacturing method of the front pillar according to this embodiment is a method for manufacturing a front pillar including a window opening formed in an inner panel by press molding, a flange formed at an outer edge portion, and a stepped portion along the extending direction of the inner panel. The method includes a step of applying an adhesive along a ridge line formed at a corner of the stepped portion, a step of covering the adhesive with a patch having a bulging shape that bulges away from the corner of the stepped portion and that bends along the raised shape of the stepped portion, a step of pressing the patch against the stepped portion to stretch the adhesive, a step of welding the patch to the inner panel, and a step of curing the adhesive. and a stepped portion along the extending direction of the inner panel. In the method for manufacturing a front pillar, a step of applying an adhesive along a ridge line formed at a corner of the stepped portion, a step of covering the adhesive with a patch having a bulging shape that bulges away from the corner of the stepped portion and that bends along the raised shape of the stepped portion, a step of pressing the patch against the stepped portion to stretch the adhesive, a step of welding the patch to the inner panel, and a step of curing the adhesive. before The corner portion is provided with a convex bead that protrudes toward the interior of the vehicle, and the patch is arranged in the position of the convex bead. It is positioned so as to cover the aforementioned convex bead at the location. Furthermore, the manufacturing method of the front pillar according to this embodiment involves press molding of the inner panel The window opening and flange formed on the outer edge and the inner panel along the extending direction In a method for manufacturing a front pillar having a stepped portion, the ridge formed at the corner of the stepped portion. The process of applying adhesive along the line, and the process of causing a bulge to bulge away from the corner of the stepped portion. A step of covering the adhesive with a patch that has a protruding shape and bends along the raised shape of the stepped portion. The process involves pressing the patch against the stepped portion to spread the adhesive, and the process involves applying the patch to the stepped portion. The process includes welding to the inner panel and curing the adhesive. The flange is provided with a recess that is recessed on the outside of the vehicle, and one end face of the patch is the recess. It bends inward.

Advantages of the Invention

[0011] The present invention provides a front pillar that prevents delayed fracture, an upper member of the front pillar, and a method for manufacturing the front pillar. [Brief explanation of the drawing]

[0012] [Figure 1] A schematic diagram of a vehicle body frame to which a front pillar according to an embodiment of the present invention is applied. [Figure 2] A schematic side view of the upper front pillar member according to an embodiment of the present invention, as seen from the passenger compartment side. [Figure 3] Enlarged view of the range Ω in Figure 2. [Figure 4] (A) to (D) are cross-sectional views taken along line IV-IV in Figure 3, illustrating the work process. [Figure 5] A flowchart illustrating a method for manufacturing a front pillar according to an embodiment of the present invention. [Modes for carrying out the invention]

[0013] Hereinafter, embodiments of the present invention will be described based on the attached drawings. In the following description and drawings, the directions "front," "rear," "up," "down," "right," "left," "inside the vehicle," and "outside the vehicle" refer to directions relative to a driver sitting in a vehicle equipped with the front pillar according to the embodiment.

[0014] Figure 1 is a schematic diagram of a vehicle body frame 50 to which a front pillar 10 according to an embodiment of the present invention is applied. As shown in Figure 1, the vehicle 100, whose frame is constructed from a vehicle body frame 50, has a roof panel 101 that forms the ceiling of the passenger compartment and a floor panel 102 that forms the floor, arranged horizontally in an orderly fashion. The vehicle body frame 50 connects these roof panel 101 and floor panel 102.

[0015] The vehicle frame 50 (10-22) will be explained below using Figure 1. A pair of left and right side sills 13, extending in the longitudinal direction of the vehicle, are joined to the left and right ends of the floor panel 102. Similarly, a pair of left and right roof side rails 14, also extending in the longitudinal direction of the vehicle, are joined to the left and right ends of the roof panel 101. The left and right side sills 13 and the roof side rails 14 are connected by welding pairs of left and right pillars 10, 11, and 12 to each other. The pillars 10, 11, and 12 are arranged in the order of front pillar 10, center pillar 11, and rear pillar 12 from the front of the vehicle.

[0016] The front door is pivotally supported by a hinge on the front pillar 10. This front door is installed in a front door opening 60, which is formed by the front pillar 10, the side sill 13, the center pillar 11, and the roof side rail 14, and is movably opened and closed. In other words, the front pillar 10 constitutes the front edge of the front door opening 60. Similarly, the rear door is installed in a rear door opening 70, which is formed by the side sill 13, the center pillar 11, the roof side rail 14, and the rear pillar 12.

[0017] Furthermore, a dash panel 15, positioned along the vehicle width direction, is joined to the left and right front pillars 10. In addition, a pair of left and right front inside panels 16 are joined to the front sides of the pair of left and right front pillars 10. The left and right front inside panels 16 are connected to each other at their front ends by a front cross member 17, which is positioned in the vehicle width direction. The dash panel 15, front inside panels 16, and front cross member 17 form an engine compartment at the front of the vehicle frame 50. Above the dash panel 15, a windshield 103 is positioned to cover the front of the passenger compartment. The windshield 103 is supported by the front pillars 10, with its left and right edges sandwiched between them.

[0018] The front pillar 10 has a closed cross-sectional structure formed by overlapping and welding together an inner panel and an outer panel, both of which are press-formed sheet metal products. The front pillar 10 is also constructed by welding together an upper front pillar member 18 and a lower front pillar member 19. In the following description, the inner panel 21 of the upper front pillar member 18 will be simply referred to as "inner panel 21," and the outer panel 22 of the upper front pillar member 18 will be simply referred to as "outer panel 22."

[0019] The upper front pillar member 18 is branched into two in the front-rear direction of the vehicle. The branched upper front pillar member 18 is connected to the lower front pillar member 19, forming an opening (window opening) 80 with a triangular or trapezoidal shape in the front pillar 10. A window pane 104 is fitted into this window opening 80, functioning as a fixed window that widens the view to the front and sides of the vehicle. Furthermore, the front pillar 10 is made of ultra-high-strength steel plate with a tensile strength of 980 MPa or more, from the viewpoint of protecting occupants from collision accidents.

[0020] The number of parts or the shape of the parts that make up the front pillar 10 vary greatly depending on the vehicle model. Depending on the vehicle model, the upper member 18 of the front pillar may not be branched into two, but rather a window opening 80 may be formed by drilling. In this case, the lower edge of the window opening 80 is not formed. In addition, the upper and lower structures of the front pillar 10 may be integrally molded and may not be clearly distinguishable, such as the upper member 18 and the lower member 19 of the front pillar.

[0021] Next, the application method of the patch 23 to the front pillar 10 will be explained using Figures 2 and 3. Figure 2 is a schematic side view of the upper front pillar member 18 as seen from the passenger compartment side. Figure 3 is an enlarged view of the area Ω in Figure 2. As shown in Figures 2 and 3, a flange 24a is provided along the outer edge of the inner panel 21, following its outer shape. Similarly, a flange 24b is provided along the outer edge of the outer panel 22, following its outer shape.

[0022] The flange 24a of the inner panel 21 is overlapped with the flange 24b of the outer panel 22 and spot-welded, thereby forming the closed cross-sectional structure described above for the front pillar 10. The internal space 90 (Figure 4) of this closed cross-sectional structure may house, for example, an in-car recorder, tweeters, and their wiring. The inner panel 21 may be formed by joining multiple steel sheet molded parts to form a single surface, or by press forming onto a single steel sheet. Similarly, the outer panel 22 may be formed from a single steel sheet, or by joining multiple steel sheet molded parts to form a single surface.

[0023] The surface of the inner panel 21 is provided with a stepped portion 26 that has a convex shape toward the passenger compartment. The stepped portion 26 rises from one end, for example, the flange 24a1 (24a) in front of the stepped portion 26, then bends to form a corner portion 26a, and connects to the other end, for example, the flange 24a2 (24a) behind the stepped portion 26. In other words, flanges 24a1 and 24a2 are connected to both the lower and upper ends of the stepped portion 26. Adhesive 27 is applied to this stepped portion 26. The adhesive 27 prevents hydrogen from entering the structural framework of the inner panel 21 from the surrounding environment. As mentioned above, since ultra-high-strength steel plate is used for the front pillar 10, the front pillar 10 is in a state where hydrogen can easily penetrate into its structure. In particular, the upper front pillar member 18, which has a bifurcated branch shape, is susceptible to hydrogen penetration because stress generated during press forming remains. Therefore, adhesive 27 is applied to the inner panel 21 from the passenger compartment side to prevent hydrogen from entering.

[0024] The adhesive 27 is covered by a patch 23. The edges of the patch 23 are joined to the inner panel 21 by spot welding. The material of the patch 23 is, for example, a steel plate having an tensile strength equal to or less than that of the upper front pillar member 18. The material of the patch 23 may be permeable to hydrogen, as the adhesive 27 prevents hydrogen from entering.

[0025] Patch 23 has a curved shape that follows the raised shape of the stepped portion 26. By covering the stepped portion 26 with patch 23 over the adhesive 27, the adhesive 27 is secured to the area that needs to be protected from hydrogen intrusion. The areas to which patch 23 should be applied are identified by deep drawing analysis using simulations performed during the design phase of the press die for the inner panel 21. Generally, stress concentrates on the periphery of the window opening 80, especially in areas with strong curvature. For example, if the window opening 80 has a triangular shape, stress concentrates around the three vertices of the triangle, so it is preferable to apply patch 23 around these vertices. In this way, by covering and securing areas prone to delayed fracture with patch 23, the covered areas can also be reinforced by the strength of patch 23 itself.

[0026] Furthermore, patch 23 has a bulge shape 23a that bulges away from the corner 26a of the stepped portion 26. By pressing patch 23 against the stepped portion 26, the adhesive 27 applied to the inner panel 21 is pushed into and filled into this bulge shape 23a. The patch 23 having such a bulge shape 23a prevents the stepped portion 26 and patch 23 from contacting the stepped portion 26 at locations other than the edges of patch 23, i.e., the belly of patch 23. Therefore, it is possible to prevent the adhesive layer from breaking due to the belly of patch 23 contacting the stepped portion 26. Also, even if patch 23 contacts the stepped portion 26 at locations other than the corner 26a, it is possible to prevent the adhesive layer from breaking at the corner 26a, where hydrogen is particularly likely to penetrate. The convex bead 26b and concave 26c on the inner panel 21 will be explained together in the following description of the manufacturing method.

[0027] Next, the manufacturing method of the front pillar 10 incorporating a delayed fracture prevention process will be explained using Figures 4(A) to (D) and Figure 5 (refer to Figure 2 or Figure 3 as appropriate). Figures 4(A) to 4(D) are cross-sectional views taken along the line IV-IV in Figure 3. In Figures 4(A) to 4(D), the operation progresses from Figure 4(A) to Figure 4(D). Figure 5 is a flowchart showing the manufacturing method of the front pillar 10. Hereafter, step S11 will be abbreviated as S11. Steps S12 and below will be abbreviated similarly. Furthermore, it is assumed that the inner panel 21 used has a flange 24a and a stepped portion 26 formed thereon as described above.

[0028] First, as shown in Figure 4(A), adhesive 27 is applied to the stepped portion 26 of the inner panel 21, and the patch 23 is placed over the adhesive 27 (S11). The adhesive 27 is applied along the ridge line formed by the corner portion 26a of the stepped portion 26. In many cases, a raised bead 26b that protrudes toward the interior of the vehicle is provided on a part of the corner portion 26a of the stepped portion 26, as shown in Figures 2, 3 and 4(A) to (D), from the viewpoint of ensuring the strength of the stepped portion 26. It is desirable that the adhesive 27 be applied to the area of ​​the stepped portion 26 where this raised bead 26b is provided on the corner portion 26a. By applying the adhesive 27 along the top or base of the raised bead 26b, the positioning of the adhesive 27 becomes easier.

[0029] Furthermore, the top surface 26d of the stepped portion 26 may be provided with a recessed area 26c that is recessed toward the outside of the vehicle, as shown in Figures 2, 3, and 4(A) to (D). The recessed area 26c is provided, for example, to strengthen torsional rigidity or bending rigidity, or to eliminate wrinkles. Therefore, it is desirable to bend one end face of the patch 23 so that it conforms to the inside of this recessed area 26c. With such a shape, the end edge 23b of the patch 23 makes contact with the recessed area 26c first, and the adhesive 27 can be preferentially spread toward the corner 26a and the flange 24a1 side below the step.

[0030] Furthermore, by bending the end face of the patch 23 in this way and making it conform to the interior of the recess 26c, the patch 23 can be made to bulge further away from the corner 26a of the stepped portion 26. As a result, a larger gap can be created between the patch 23 and the inner panel 21, allowing the adhesive 27 to be reliably distributed inside the patch 23. Therefore, film breakage of the adhesive layer can be prevented more reliably.

[0031] Next, as shown in Figures 4(B) and 4(C), the patch 23 is pressed to spread the adhesive 27 (S12). At this time, it is desirable to press the patch 23 in a direction such that the adhesive 27 fills the bulge shape 23a. Specifically, if the adhesive 27 is placed on the upper part of the convex bead 26b as shown in Figure 4(A), the patch 23 is pressed from the top surface 26d of the stepped portion 26 toward the convex bead 26b, causing the adhesive 27 to flow from the side surface of the stepped portion 26 to the flange 24a1 below the step. By pressing in this way, the adhesive 27 can preferentially flow to the flange 24a1 below the step, allowing the adhesive 27 to spread across the entire surface of the patch 23.

[0032] Next, as shown in Figure 4(D), spot welding is performed on the inner panel 21, for example, at one end 23b of the patch 23, which is designated as the welding point 28 (S13). By spot welding patch 23, the uncured adhesive 27 is held in place at the stepped portion 26 by patch 23. At this time, the flange 24a of the inner panel 21 and the flange 24b of the outer panel 22 are welded together to form the upper front pillar member 18. Furthermore, the upper front pillar member 18 and the lower front pillar member 19 are welded together to form the front pillar 10. The vehicle body frame 50 is then formed using the front pillar 10 formed in this manner. Furthermore, various metal panels such as the floor panel 102 and roof panel 101 are welded to the vehicle body frame 50 in accordance with the normal vehicle manufacturing process.

[0033] Next, the vehicle frame 50 is electroplated (S14). Then, the adhesive 27 is cured during the electrodeposition coating baking process of the vehicle frame 50 (S15), and the manufacturing process of the vehicle frame 50, including the front pillar 10, is completed (END). The vehicle frame 50 is then subjected to subsequent processes, such as painting, which are the same as in normal vehicle manufacturing. In this way, by applying patch 23 during the assembly process of the vehicle frame 50, it is possible to take measures against delayed failure without adding any additional processes.

[0034] As described above, according to the embodiment of the present invention, hydrogen intrusion due to film breakage of the adhesive 27 can be prevented at the corner portion 26a of the inner panel 21. Therefore, delayed fracture of the front pillar 10 can be prevented more reliably. As a result, it is possible to manufacture parts with a larger deformation amount by press molding than conventional methods without causing delayed fracture. Furthermore, in the embodiment of the present invention, since heat treatment is unnecessary, a front pillar 10 having the dimensions and surface properties as designed can be obtained.

[0035] Although several embodiments of the present invention have been described, these embodiments are presented as examples only and are not intended to limit the scope of the invention. These embodiments can be implemented in various other forms, and various omissions, substitutions, modifications, and combinations are possible without departing from the spirit of the invention. These embodiments and their variations are included within the scope and essence of the invention, as well as within the scope of the claims and its equivalents.

[0036] For example, in some vehicle models, the roof side rails and front pillars are molded as a single unit, making them indistinguishable. The front pillar according to the present invention also includes such front pillars in which the roof side rails are integrated. [Explanation of symbols]

[0037] 10...Front pillar, 11...Center pillar, 12...Rear pillar, 13...Side sill, 14...Roof side rail, 15...Dash panel, 16...Front inside panel, 17...Front cross member, 18...Upper front pillar member, 19...Lower front pillar member, 21...Inner panel of upper front pillar panel, 22...Outer panel of upper front pillar panel, 23 (23a, 23b)...Patch (bulging shape, edge), 24a (24a1 24a2)...Flange of the inner panel, 24b...Flange of the inner panel, 26(26a~26d)...Stepped section, 26a...Corner section, 26b...Convex bead, 26c...Concave section, 26d...Top surface, 27...Adhesive, 28...Welded section, 50...Body frame, 60...Opening for the front door, 70...Opening for the rear door, 80...Opening for the window, 90...Interior space, 100...Vehicle, 101...Roof panel, 102...Floor panel, 103...Windshield, 104...Window glass, Ω...Enlarged range.

Claims

1. The inner and outer panels are superimposed and the vehicle is divided into two branches in the front-to-rear direction. In the upper member of the branching front pillar, Formed along the outer edge of the inner panel and in contact with the outer panel The flanges to be joined, One end of the flange protrudes away from the outer panel and then bends. Stepped portion on the surface of the inner panel that forms a corner and is connected to the flange on the other end. and, A patch that bends along the raised shape of the stepped portion and covers the stepped portion, The bulge shape of the patch, which bulges away from the corner of the stepped portion, An adhesive is filled between the patch, which includes the aforementioned bulging shape, and the inner panel. Prepare, A convex bead is provided at the aforementioned corner, protruding toward the interior of the vehicle. The aforementioned patch is provided so as to cover the convex bead at the location where the convex bead is positioned. Top pillar upper member.

2. The inner and outer panels are superimposed and the vehicle is divided into two branches in the front-to-rear direction. In the upper member of the branching front pillar, Formed along the outer edge of the inner panel and in contact with the outer panel The flanges to be joined, One end of the flange protrudes away from the outer panel and then bends. Stepped portion on the surface of the inner panel that forms a corner and is connected to the flange on the other end. and, A patch that bends along the raised shape of the stepped portion and covers the stepped portion, The bulge shape of the patch, which bulges away from the corner of the stepped portion, An adhesive is filled between the patch, which includes the aforementioned bulging shape, and the inner panel. Prepare, One end face of the patch is positioned to conform to the recess provided in the flange that is recessed outwards from the vehicle. The upper front pillar member is curved in a unique way.

3. The inner panel and outer panel are superimposed to form the front door opening of the vehicle body. In the front pillar that forms the leading edge of the mouth, A window opening provided through the inner panel and the outer panel, The upper front pillar structure of the inner panel that constitutes the peripheral edge of the window opening, The front pillar upper structure is integrally formed with the front pillar upper structure and joined to the lower part of the vehicle frame. The lower pillar structure, The outer edge is formed along the outer edge of the upper front pillar structure and the outer part A flange that is joined to the flannel, One end of the flange protrudes away from the outer panel and then bends. A step on the upper structure of the front pillar that forms a corner and connects to the flange on the other end. Department and, A patch that bends along the raised shape of the stepped portion and covers the stepped portion, The bulge shape of the patch, which bulges away from the corner of the stepped portion, An adhesive is filled between the patch, which includes the aforementioned bulging shape, and the inner panel. Prepare, A convex bead is provided at the aforementioned corner, protruding toward the interior of the vehicle. The aforementioned patch is provided so as to cover the convex bead at the location where the convex bead is positioned. Pillar.

4. The inner panel and outer panel are superimposed to form the front door opening of the vehicle body. In the front pillar that forms the leading edge of the mouth, A window opening provided through the inner panel and the outer panel, The upper front pillar structure of the inner panel that constitutes the peripheral edge of the window opening, The front pillar upper structure is integrally formed with the front pillar upper structure and joined to the lower part of the vehicle frame. The lower pillar structure, The outer edge is formed along the outer edge of the upper front pillar structure and the outer part A flange that is joined to the flannel, One end of the flange protrudes away from the outer panel and then bends. A step on the upper structure of the front pillar that forms a corner and connects to the flange on the other end. Department and, A patch that bends along the raised shape of the stepped portion and covers the stepped portion, The bulge shape of the patch, which bulges away from the corner of the stepped portion, An adhesive is filled between the patch, which includes the aforementioned bulging shape, and the inner panel. Prepare, One end face of the patch is positioned to conform to the recess provided in the flange that is recessed outwards from the vehicle. The front pillar curves in a unique way.

5. The inner panel is formed by press molding, and a flange is formed on the outer edge and the I In a method for manufacturing a front pillar that includes a stepped portion along the extending direction of the inner panel, The steps include applying adhesive along the ridge line formed at the corner of the stepped portion, The raised shape of the stepped portion has a bulge that extends away from the corner of the stepped portion. A step of covering the adhesive with a patch that bends along the shape, The steps include pressing the patch against the stepped portion to spread the adhesive, The process of welding the aforementioned patch to the inner panel, The process includes a step of curing the adhesive, A convex bead is provided at the aforementioned corner, protruding toward the interior of the vehicle. The aforementioned patch is positioned to cover the raised bead at the location where the raised bead is placed. A method for manufacturing a corn pillar.

6. The inner panel is formed by press molding, and a flange is formed on the outer edge and the I In a method for manufacturing a front pillar that includes a stepped portion along the extending direction of the inner panel, The steps include applying adhesive along the ridge line formed at the corner of the stepped portion, The raised shape of the stepped portion has a bulge that extends away from the corner of the stepped portion. A step of covering the adhesive with a patch that bends along the shape, The steps include pressing the patch against the stepped portion to spread the adhesive, The process of welding the aforementioned patch to the inner panel, The process includes a step of curing the adhesive, The flange is provided with a recess that is indented on the outside of the vehicle. A manufacturing method for a front pillar in which one end face of the patch is bent to conform to the recess. Law.

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