JP5747006B2 - Body side structure - Google Patents

Description

  The present invention relates to a vehicle body side structure, and more particularly to a technique for reducing stress concentration of a front pillar at the time of a frontal collision of a vehicle and reducing a blind spot of the front pillar.

  A vehicle body side structure in which a fixed window such as a triangular window is provided on a front pillar is known. The vehicle described in Patent Document 1 is an example, and a front bar including a roof side rail portion is provided with a division bar obliquely, and a fixed window is provided between the division bar and the front pillar.

JP 2008-62707 A

  However, in such a conventional vehicle body side structure, since the upper end of the division bar is connected to the intermediate position of the front pillar, stress concentration is likely to occur in those connecting parts at the time of a frontal collision, etc. When a member having a large cross-sectional area is used to ensure the strength, there is a problem that the blind spot of the front pillar portion becomes large and the visibility in the obliquely forward direction of the vehicle is deteriorated.

  The present invention has been made against the background of the above circumstances, and its object is to reduce the stress concentration of the front pillar at the time of a frontal collision of the vehicle in a vehicle body side structure in which a fixed window is provided on the front pillar. At the same time, the blind spot of the front pillar is reduced to improve the visibility of the vehicle obliquely forward.

  In order to achieve such an object, the first invention provides a vehicle body side structure in which a fixed window is provided on a front pillar. (A) The front pillar includes (a-1) a front including a position above the fixed window. It is provided along the side edge of the glass, is curved so as to bulge upward on the vehicle, reaches the upper part of the center pillar, and both ends are fixed to the front pillar lower and the upper part of the center pillar, respectively. A first cylinder, and (a-2) provided in an up-down direction along an edge of the fixed window on the vehicle rear side, and bent toward the vehicle rear side as it goes upward, The first and second cylinders are joined to be parallel to each other and arranged along the first cylinder toward the upper portion of the center pillar, and both ends are fixed to the front pillar lower and the upper portion of the center pillar, respectively. And (b) a bending portion where at least the second cylinder joins the first cylinder from the vehicle rear portion of the fixed window, and the first The joining portion where the cylindrical body and the second cylindrical body join each other is characterized by being strengthened by heat treatment.

  According to a second aspect of the present invention, in the vehicle body side portion structure according to the first aspect of the present invention, at least one of the first cylindrical body and the second cylindrical body is an intermediate between the joining portion and the end portion on the center pillar side. A bent portion that is preferentially bent and deformed by a load at the time of a frontal collision is provided at a position.

  According to a third aspect of the present invention, in the vehicle body side portion structure of the first aspect of the present invention, at least one of the first cylindrical body and the second cylindrical body is an intermediate between the merging portion and the end portion on the center pillar side. The position is provided with a low-strength portion that is locally low-strength by strengthening both sides by the heat treatment, and is preferentially bent and deformed by a load at the time of a frontal collision.

  According to a fourth aspect of the present invention, in the vehicle body side part structure according to any one of the first to third aspects of the present invention, the first cylindrical body and the second cylindrical body each have protrusions protruding toward the outer peripheral side. It is provided in the longitudinal direction.

  According to a fifth aspect of the vehicle body side structure of the fourth aspect of the present invention, between the joining portion where the first cylindrical body and the second cylindrical body are arranged side by side and the end portion on the center pillar side, The protrusions provided on each cylinder are overlapped and welded so as to be in contact with each other.

  According to a sixth aspect of the present invention, in the vehicle body side structure according to the fourth or fifth aspect of the invention, the merged portion where the first cylindrical body and the second cylindrical body are branched from each other and the end portion on the front pillar lower side The fixed window is attached to the protrusion provided on each cylinder.

  According to a seventh aspect of the present invention, in the vehicle body side part structure of the fourth aspect of the invention, (a) the windshield is attached to the ridge of the first cylinder, and (b) the ridge of the second cylinder. A weatherstrip is attached.

  In such a vehicle body side structure, the first cylinder and the second cylinder provided with the fixed window are disposed over the front pillar lower and the center pillar, respectively. The stress concentration that occurs in the intermediate part of the cylindrical body is relieved sometimes. In addition, since at least the bending portion of the second cylindrical body and the merged portion of the first cylindrical body and the second cylindrical body are strengthened by heat treatment, coupled with relaxation of stress concentration, These cylinders can be made thin while ensuring a predetermined strength, and the blind spot can be reduced by enlarging the fixed window, for example, and the visibility in the obliquely forward direction of the vehicle can be improved.

  In the second invention, at least one of the first cylinder and the second cylinder is provided with a bent portion, and is preferentially bent and deformed by a load at the time of a frontal collision, but the intermediate position where the bent portion is provided is Since the vehicle is curved so as to bulge upward, the bent portion is bent and deformed so as to protrude upward, and the safety of passengers in the vehicle interior is ensured. When a bent portion is provided in only one of the first cylinder and the second cylinder, when one of the cylinders is bent and deformed upward from the bent portion, the other cylinder However, the other cylinder is also curved smoothly so that it bulges upward on the vehicle, so that it bends so that it protrudes upward in the same manner as one cylinder. It is deformed and the safety of passengers in the passenger compartment is ensured.

  In the third invention, at least one of the first cylinder and the second cylinder is provided with a low-strength portion and is preferentially bent and deformed by a load at the time of a frontal collision. Since the position is curved so as to bulge upward in the vehicle, the low-strength portion is bent and deformed so as to protrude upward, and the safety of the passenger in the vehicle interior is ensured. When the low-strength part is provided in only one of the first cylinder and the second cylinder, when the one cylinder is bent and deformed upward from the low-strength part, Although stress concentration occurs in the cylinder and it is bent and deformed, the other cylinder is also curved smoothly so as to bulge upward in the vehicle, so that it protrudes upward in the same manner as one cylinder. It is bent and deformed to ensure the safety of passengers in the passenger compartment.

  In the 4th invention, since the 1st cylinder and the 2nd cylinder are each provided with the protrusion which protrudes to an outer peripheral side, it is the 1st between the above-mentioned merge part and the center pillar like the 5th invention, for example. In the portion where the cylindrical body and the second cylindrical body are arranged side by side, the protrusions provided on each cylindrical body are overlapped and welded so as to contact each other, thereby further increasing the strength of the cylindrical bodies. be able to. Thereby, those cylinders can be narrowed to further improve the visibility of the vehicle obliquely forward.

  In the sixth aspect of the present invention, in the portion where the first cylinder and the second cylinder are branched from each other between the joining portion and the front pillar lower, the fixed window is provided on the protrusion provided on the cylinder. Since it is attached, the attachment structure can be simplified and the vehicle weight can be reduced while maintaining the attachment strength.

  In the seventh invention, the windshield is attached to the protrusion provided on the first cylinder, and the weather strip is attached to the protrusion provided on the second cylinder, so that the attachment strength thereof is maintained. However, the mounting structure can be simplified and the vehicle weight can be reduced.

It is a perspective view which shows the left side part of the vehicle to which this invention was applied. It is a perspective view which shows the vehicle body internal structure of the left side part of the vehicle of FIG. It is sectional drawing of the III-III arrow part in FIG. It is sectional drawing of the IV-IV arrow part in FIG. It is a figure explaining the other Example of this invention, and is a perspective view of the vehicle body internal structure corresponding to FIG. It is a figure explaining another Example of this invention, and is a perspective view of the vehicle body internal structure corresponding to FIG. It is a figure explaining another Example of this invention, and is a perspective view of the vehicle body internal structure corresponding to FIG. It is sectional drawing of the VIII-VIII arrow part in FIG. It is sectional drawing of the IX-IX arrow part in FIG. It is sectional drawing of the XX arrow part in FIG. It is a figure explaining another Example of this invention, and is a perspective view of the vehicle body internal structure corresponding to FIG. It is sectional drawing of the XII-XII arrow part in FIG. It is sectional drawing of the XIII-XIII arrow part in FIG. It is sectional drawing of the XIV-XIV arrow part in FIG. It is a figure explaining the moment which arises in a front pillar at the time of front collision.

  The vehicle body side part structure of the present invention can be applied to a pair of front pillar portions provided on both left and right sides of the vehicle, and is preferably applied to both of the vehicle body side part structures. It does not matter if it is applied to either one of them.

  As the hollow first and second cylindrical bodies, cylindrical pipe materials are preferably used, but a metal plate material such as a steel plate may be rolled into a cylindrical shape, and the cross section may be an ellipse, a rectangle, or a polygon. It is also possible to adopt a cylindrical body such as. These cylinders are arranged substantially in parallel between the merged portion and the upper part of the center pillar. For example, the cylinders are arranged vertically so that the first cylinder is located above (including obliquely above) the second cylinder. However, it can also be arranged horizontally so as to be positioned in parallel in the vehicle width direction. Between the joining portion and the end portion on the center pillar side, both the first cylinder and the second cylinder are curved so as to bulge upward in the vehicle, and for example, bend smoothly. However, it may be a curved shape as a whole, and may include a plurality of straight portions and bent portions. The first cylindrical body and the second cylindrical body may be in contact with each other between the joining portion and the end portion on the center pillar side, or may be arranged at a predetermined interval.

  The bending portion of the second cylindrical body and the joined portion of the first cylindrical body and the second cylindrical body are increased in strength by heat treatment, for example, after heating and bending processing when bending into a predetermined shape The strength can be increased by heat treatment (quenching) by rapid cooling, but the strength can also be increased by performing a heat treatment such as quenching in a separate process. This heat treatment may be performed only on the bent portion and the joining portion, but the strength of the entire first and second cylinders may be increased by heat treatment. About the attachment part of both ends, you may make it not raise intensity | strength, when ensuring a contact state with the other party (a front pillar lower or a center pillar). For example, when high-strength steel is used as the cylindrical body, the tensile strength can be increased to 1100 MPa or more by quenching, and about 1500 MPa is desirable. The tensile strength of the unquenched part is about 500 to 700 MPa.

  In the second and third inventions, at least one of the first cylinder and the second cylinder is provided with a bent portion or a low-strength portion, but either one of the first cylinder or the second cylinder It can be provided only for both or both. The intermediate position where these bent parts or low-strength parts are provided is appropriately determined so that it can be bent and deformed so as to protrude upward, so that the safety of passengers in the passenger compartment can be ensured. It is set at a position where the resulting moments are balanced. The low-strength part of the third invention is an unquenched part where quenching is not performed, for example, locally heated by high-frequency induction heating while moving the cylindrical body, sequentially bending the heated part with reduced strength, and rapidly cooling When the shape is frozen and the strength is increased, it can be provided in an arbitrary range by interrupting energization to the heating coil or by cooling at room temperature (slow cooling).

  In the fourth to seventh inventions, a protrusion projecting to the outer peripheral side is provided on the side surface of the cylindrical body. In the case of a pipe material of high-strength steel, this protrusion is formed by, for example, roll forming or press forming before bending. Etc. can be formed. Although the width dimension (protrusion dimension) of a protrusion can be determined suitably, for example, when attaching a windshield and a fixed window, 10 mm or more is desirable and about 15 mm is suitable.

  In the fifth invention, the protrusions provided on each cylindrical body are overlapped between the joining portion and the end portion on the center pillar side so as to contact each other, and are welded by arc welding, resistance welding or the like. May be continuously welded over the entire length, or may be simply welded intermittently, as long as at least a part of the material is welded.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing a left side portion 10 of a vehicle to which the present invention is applied, and includes a windshield 12, a front door 14, a front fender 16, a roof panel 17, and a fixed window 18. The fixed window 18 is a transparent member such as glass. 2 is a perspective view showing the vehicle body internal structure of the left side portion 10, FIG. 3 is a sectional view taken along the line III-III in FIG. 2, and FIG. 4 is a sectional view taken along the line IV-IV in FIG. There are a front pillar 20 and a center pillar 22. The front pillar 20 includes a front pillar lower 24 and a pair of first cylindrical body 26 and second cylindrical body 28, and the first cylindrical body 26 and the second cylindrical body 28 are provided with a front pillar lower 24. Between the upper end of the center pillar 22 and the upper end of the center pillar 22. That is, the first cylinder body 26 and the second cylinder body 28 also serve as a part of a conventional roof side rail. The windshield 12, the front door 14, the front fender 16, the roof panel 17, and the fixed window 18 are attached to the front pillar 20.

  Each of the first cylinder body 26 and the second cylinder body 28 is configured by a pipe material of high-tensile steel having a circular cross section, and the first cylinder body 26 includes an upper position of the fixed window 18. Are provided along the side edge of the windshield 12 and are smoothly curved so as to bulge upward in the vehicle and reach the upper portion of the center pillar 22, and both ends thereof are the front pillar lower 24 and the center pillar, respectively. 22 is fixed. The second cylinder 28 is provided in the vertical direction along the edge of the fixed window 18 on the vehicle rear side, and is bent toward the vehicle rear side in parallel with the first cylinder 26 as it goes upward. , And arranged substantially parallel to the upper portion of the center pillar 22 along the first cylindrical body 26, and both ends thereof are fixed to the front pillar lower 24 and the center pillar 22, respectively. Between the joining portion 60 and the end on the side of the center pillar 22, each of the first cylinder body 26 and the second cylinder body 28 has a curved shape that is smoothly curved so as to bulge upward. In addition, the first cylinders 26 are disposed substantially parallel to each other in a positional relationship above the second cylinder 28 or obliquely above the vehicle inside. The first cylinder 26 and the second cylinder 28 have the same diameter and thickness in the present embodiment. For example, the diameter and thickness of the second cylinder 28 are the same as those of the first cylinder 26. It can be set as appropriate, such as smaller.

  The upper end of the front pillar lower 24 has an inverted L shape, and the first cylindrical body 26 is integrally fixed to the first connecting portion 30 protruding upward on the front side of the vehicle via a bracket 32 by welding, so that the vehicle The second cylinder 28 is integrally fixed to the second connecting portion 34 provided at the rear end corner portion of the rear side by means of a bracket 36 by welding. The first cylindrical body 26 and the second cylindrical body 28 may be directly fixed to the front pillar lower 24 by welding or the like, or may be firmly fixed using a bracket after being welded. As the welding method, arc welding or resistance welding is appropriate. The fixed window 18 is disposed in a portion surrounded by the upper end of the front pillar lower 24 and the first cylindrical body 26 and the second cylindrical body 28. As is clear from FIG. 4, an inner panel 40 is integrally fixed to the first cylindrical body 26 by welding, and an outer panel 42 is integrally fixed to the inner panel 40. The first cylindrical body 26 is disposed inside a cylindrical shape formed by the inner panel 40 and the outer panel 42. Both side portions of the inner panel 40 and the outer panel 42 are overlapped with each other and integrally joined to each other by arc welding, resistance welding, or the like, and the windshield 12 is attached to one of the joining portions 44 via a seal member 45. The fixed window 18 is fixed to the other joint 46 that is fixed and located inside the branch via a seal member 47. The mounting structure on the second cylindrical body 28 side of the fixed window 18 is configured in the same manner as the mounting structure on the first cylindrical body 26 side. In addition, the code | symbol 48 of FIG. 4 is a front pillar trim.

  The opposite end portions of the first cylinder body 26 and the second cylinder body 28 are integrally fixed to the center pillar 22 through a common bracket 50 by arc welding, resistance welding, or the like. The first cylindrical body 26 and the second cylindrical body 28 may be directly fixed to the center pillar 22 by welding or the like, or may be firmly fixed using a bracket after being welded. In addition, the first cylinder body 26 and the second cylinder body 28 are bent at the intermediate portion thereof, specifically, the second cylinder body 28 is bent from the vehicle rear side portion of the fixed window 18. Also in the vicinity of the joining portion 60 that is substantially parallel to the cylindrical body 26, the intermediate bracket 52 is welded and integrally connected to each other. As is clear from FIG. 3, the upper end of the intermediate bracket 52 is integrally fixed to the joint 44 by resistance welding or the like while being sandwiched between the joints 44 of the inner panel 40 and the outer panel 42. The lower end portions are integrally fixed to each other by resistance welding or the like while being sandwiched between the joint portions 56 on the lower side (door side) of the inner panel 40 and the outer panel 42. The windshield 12 is fixed to one joint portion 44 via a seal member 45 or the roof panel 17 is fixed, and the weather strip 54 is attached to the other joint portion 56. The weather strip 54 is made of an elastic body such as rubber, and the space between the weather strip 54 and the front door 14 that is opened and closed is liquid-tightly sealed, so that intrusion of water or sound is suppressed.

  On the other hand, the first cylinder body 26 and the second cylinder body 28 are such that at least the joining portion 60 and the second cylinder body 26 join the first cylinder body 26 from the vehicle rear portion of the fixed window 18. The bend-formed part 62 that is bent to a high degree is strengthened by heat treatment. In FIG. 2, a range QE surrounded by an alternate long and short dash line is a region where high strength is required in the merged portion 60 and the bending portion 62. In the present embodiment, heat treatment is performed over substantially the entire length of the first cylindrical body 26 and the second cylindrical body 28 except for both ends fixed to the front pillar lower 24 and the center pillar 22 by the brackets 32, 36, and 50. Is applied to increase strength. Strengthening by heat treatment is performed by, for example, locally heating to about 900 ° C. by high-frequency induction heating while moving the first cylindrical body 26 and the second cylindrical body 28, and sequentially bending the heating section whose strength has been reduced to a predetermined shape. After molding, it is performed by quenching, and the strength is increased by quenching and the shape is frozen. Depending on whether or not the heating coil is energized, the heating range and further the strengthening range by quenching can be arbitrarily set. In this embodiment, both ends are unquenched. In the present embodiment in which a high tensile steel pipe material is used as the first cylindrical body 26 and the second cylindrical body 28, the tensile strength becomes about 1500 MPa by quenching, and sufficient strength necessary for the front pillar 20 is obtained. The unquenched portions at both ends have a tensile strength of about 590 MPa, can be deformed so as to be in close contact with the front pillar lower 24 and the center pillar 22, and can be firmly fixed by the brackets 32, 36, and 50.

  In the vehicle body side part structure of this embodiment, the first cylinder body 26 and the second cylinder body 28 provided with the fixed window 18 are disposed across the front pillar lower 24 and the center pillar 22, respectively. Therefore, the stress concentration generated in the intermediate portion between the cylindrical bodies 26 and 28 at the time of a frontal collision is alleviated. Moreover, since the bending part 62 of the 2nd cylinder 28 and the confluence | merging part 60 of the 1st cylinder 26 and the 2nd cylinder 28 are heightened by heat processing, stress concentration is relieved. In combination with this, the diameters of the cylindrical bodies 26 and 28 can be reduced while ensuring a predetermined strength. Thereby, the blind spot can be reduced by enlarging the fixed window 18 or the like, and the visibility in front of the vehicle can be improved.

  Next, another embodiment of the present invention will be described. In the following embodiments, parts that are substantially the same as those in the above embodiments are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 5 is a perspective view of the vehicle body internal structure of the vehicle left side portion 10 corresponding to FIG. 2, and is basically configured in the same manner as the embodiment of FIG. Is different. The bent portion 70 is bent and deformed so that the first cylindrical body 26 that is smoothly curved so as to bulge upward on the vehicle protrudes upward from the bent portion 70 at the time of a frontal collision. In this embodiment, it is curved so as to be smoothly small and convex toward the lower side of the vehicle by pressing or bendering. In the present embodiment, the cylindrical shape is also maintained in the bent portion 70, but the bent portion 70 can be provided so as to locally collapse the cross section of the first cylindrical body 26.

  The bent portion 70 is an intermediate position between the joining portion 60 and the end portion on the center pillar 22 side, and in this embodiment, is provided at a position where moments generated in the front pillar 20 at the time of a frontal collision are substantially balanced. . FIG. 15 is an analysis diagram of the moment generated in the front pillar 20 due to the load F at the time of a frontal collision, and a portion where the front door 14 is disposed while a moment is generated on the vehicle front side where the windshield 12 is provided. Then, moments inward of the vehicle are generated, the moments are balanced at the boundary portions, and a bent portion 70 is provided in the vicinity of the balanced position. The position where the moments are balanced in this way varies depending on the vehicle, but is, for example, near the boundary between the windshield 12 and the roof panel 17. When the bent portion 70 is provided at a position where the moments are balanced in this way, the first cylindrical body 26 is bent and deformed so as to protrude upward with the bent portion 70 as a starting point with the load F at the time of frontal collision. Be able to.

  In the present embodiment, a bent portion 70 is provided at an intermediate position of the first cylindrical body 26, and the bent portion 70 is preferentially bent and deformed so as to protrude upward by a load at the time of a frontal collision. Crew safety is ensured. In addition, when the first cylindrical body 26 is deformed so as to bend toward the vehicle upper side starting from the bent portion 70 as described above, stress concentration occurs in the second cylindrical body 28, and the first cylindrical body 26 is bent and deformed at substantially the same position. Since the second cylinder 28 is smoothly curved so as to bulge upward in the vehicle at the portion where the bent portion 70 is provided, the second cylinder 28 protrudes upward in the vehicle as in the case of the first cylinder 26. It is bent and deformed, and the safety of passengers in the passenger compartment is ensured.

  In the above embodiment, the bent portion 70 is provided only in the first cylindrical body 26. However, the bent portion can be provided in both the first cylindrical body 26 and the second cylindrical body 28. You may provide a bending part only in the 2nd cylinder 28. FIG. In addition, the bent portion 70 is provided at a position where the moments generated in the front pillar 20 at the time of a frontal collision are balanced, but the intermediate position where the bent portion 70 is provided is between the junction portion 60 and the end portion on the center pillar 22 side. It is appropriately determined within a range in which it can be bent and deformed so as to protrude upward in the vehicle at the time of a frontal collision.

  FIG. 6 is a perspective view of the vehicle body internal structure of the vehicle left side portion 10 corresponding to FIG. 2 and is basically configured in the same manner as the embodiment of FIG. The difference is that low-strength portions 72 and 74 are provided on the cylindrical body 28, respectively. In FIG. 6, the portions with fine diagonal lines are the low strength portions 72 and 74. The low-strength portions 72 and 74 are locally low-strength by increasing the strength of both sides (both sides in the longitudinal direction of the cylinders 26 and 28) by heat treatment, and are preferentially bent and deformed at the time of a frontal collision. In this embodiment, the first cylinder 26 and the second cylinder 28 are heated to about 900 ° C. by high-frequency induction heating while being moved in the longitudinal direction, bent into a predetermined shape, and then rapidly cooled. It is provided by interrupting energization to the heating coil when the strength is increased and the shape is frozen by quenching. That is, the low-strength portions 72 and 74 are unquenched portions that are not partially strengthened by quenching. The heating may be performed as it is and gradually cooled. These low-strength portions 72 and 74 are intermediate positions between the joining portion 60 and the end portion on the side of the center pillar 22 as in the bent portion 70 in the embodiment of FIG. The cylinders 26 and 28 are bent and deformed so as to protrude upward from the low-strength portions 72 and 74, respectively, at the time of a frontal collision.

  In this embodiment, low strength portions 72 and 74 are provided at intermediate positions of the first cylindrical body 26 and the second cylindrical body 28, respectively, and the low strength portions 72 and 74 are respectively moved upward due to a load at the time of a frontal collision. Since it is bent and deformed preferentially so as to protrude, the safety of passengers in the passenger compartment is ensured.

  In the above embodiment, the first cylinder 26 and the second cylinder 28 are provided with the low-strength portions 72 and 74, respectively. However, any one of the first cylinder 26 and the second cylinder 28 is used. Only the low strength portion 72 or 74 may be provided on either side.

  FIG. 7 is a perspective view of the vehicle body internal structure of the vehicle left side portion 10 corresponding to FIG. 2, and FIGS. 8 to 10 are views taken along arrows VIII-VIII, IX-IX in FIG. X is a cross-sectional view taken along the arrow X, and is basically configured in the same manner as the embodiment of FIG. 2, but the protrusions 84 projecting outward from the first cylindrical body 80 and the second cylindrical body 82, respectively. The difference is that 86 is provided. The protrusions 84 and 86 can be formed by roll forming, press forming or the like before the first cylindrical body 80 and the second cylindrical body 82 are bent, and the width dimension (protrusion dimension) is about 15 mm. There are each provided in the entire axial length. The first cylinder body 80 and the second cylinder body 82 are formed of a high-strength steel pipe material having a circular cross section, as in the above embodiment, but after the protrusions 84 and 86 are provided by roll forming or the like. The diameter dimension is set in consideration of the width dimension of the protrusions 84 and 86 so as to have a predetermined diameter dimension, and a pipe material having a larger diameter dimension than the above-described embodiments is used.

  The first cylinder 80 is arranged in a posture in which the protrusions 84 protrude downward, and the second cylinder 82 is arranged in a posture in which the protrusions 86 protrude upward, the first cylinders thereof. In the portion on the side of the center pillar 22 from the merged portion 60 where the body 80 and the second cylindrical body 82 are disposed substantially in parallel, the ridges 84 provided on the cylindrical bodies 80, 82 as shown in FIG. 86 are superposed so as to be in close contact with each other in parallel, and are welded continuously or intermittently over the entire length by arc welding, resistance welding, or the like. Further, at the branch portion from the junction portion 60 to the front pillar lower 24 side, as shown in FIGS. 9 and 10, the side ends of the outer panel 42 (end portions on the inner side of the branch) are provided on the protrusions 84 and 86. ) Are joined so as to be in close contact with each other, and continuously or intermittently welded to be integrally joined, and the fixed window 18 is attached to the joint portions 88 and 90 via the seal member 47. The side end portion (end portion on the inner side of the branch) of the inner panel 40 on the fixed window 18 side is integrally fixed to the cylindrical portions of the first cylindrical body 80 and the second cylindrical body 82 by welding. Yes.

  In the present embodiment, the first cylindrical body 80 and the second cylindrical body 82 are respectively provided with protrusions 84 and 86 protruding toward the outer peripheral side, and between the joining portion 60 and the end portion on the center pillar 22 side. In the portion where the first cylindrical body 80 and the second cylindrical body 82 are arranged vertically, the protrusions 84 and 86 provided on the cylindrical bodies 80 and 82 are overlapped and welded so as to contact each other. Therefore, the strength of the cylindrical bodies 80 and 82 is further increased. Thereby, those cylinders 80 and 82 can be made thin and the visibility in the diagonally forward direction of the vehicle can be further improved.

  Further, in the portion where the first cylindrical body 80 and the second cylindrical body 82 are branched from each other between the merging portion 60 and the front pillar lower 24, the protrusions provided on the cylindrical bodies 80, 82 are provided. Since the fixed window 18 is attached to 84 and 86, the attachment structure can be simplified and the vehicle weight can be reduced while maintaining the attachment strength.

  FIG. 11 is a perspective view of the vehicle body internal structure of the vehicle left side portion 10 corresponding to FIG. 2, and FIGS. 12 to 14 are XII-XII arrow portion, XIII-XIII arrow portion, and XIV- XIV is a cross-sectional view taken along the arrow, and is basically configured in the same manner as the embodiment of FIG. 2, but the protrusions 104 projecting outward from the first cylinder 100 and the second cylinder 102, respectively. The difference is that 106 is provided. The ridges 104 and 106 are formed by roll molding or press molding in the same manner as the ridges 84 and 86 in the embodiment of FIG. 7, and the width dimension (protrusion dimension) is about 15 mm. It is provided over the entire length.

  The first cylinder 100 is arranged in a posture in which the protrusion 104 protrudes inward of the vehicle, and the second cylinder 102 is arranged in a posture in which the protrusion 106 protrudes downward or obliquely outward. In the portion on the side of the center pillar 22 from the joining portion 60 where the first cylindrical body 100 and the second cylindrical body 102 are arranged substantially in parallel, the protrusion of the first cylindrical body 100 as shown in FIG. The windshield 12 is attached to the stripe 104 via the seal member 45, and the weather strip 54 is attached to the protrusion 106 of the second cylinder 102. The roof panel 17 is also integrally fixed to the protrusion 104 of the first cylinder 100. Side ends of the inner panel 40 and the outer panel 42 are welded continuously or intermittently to the cylindrical portions of the first cylindrical body 100 and the second cylindrical body 102, respectively, and are fixed integrally. Thereby, the 1st cylinder 100 and the 2nd cylinder 102 are mutually connected integrally. In addition, a Y-shaped bracket 108 straddles the cylinders 100 and 102 at the branch part on the front pillar lower 24 side from the joining part 60 of the first cylinder 100 and the second cylinder 102. Are welded together and are integrally connected to each other.

  At the branch portion closer to the front pillar lower 24 than the merging portion 60, as shown in FIGS. 13 and 14, the fixed window 18 is connected to the joint portion 46 inside the branch of the inner panel 40 and the outer panel 42 via the seal member 47. Is attached. The windshield 12 is attached to the protrusion 104 of the first cylinder 100 via the seal member 45, and the weather strip 54 is attached to the protrusion 106 of the second cylinder 102. This is the same as the cross-sectional portion of FIG. 12 in which the bodies 100 and 102 are arranged substantially in parallel.

  In the present embodiment, the first cylindrical body 100 and the second cylindrical body 102 are respectively provided with protrusions 104 and 106 protruding outward, and the seal member 45 is attached to the protrusion 104 of the first cylindrical body 100. And the weather strip 54 is attached to the protrusion 106 of the second cylindrical body 102, so that the attachment structure can be simplified and the vehicle weight can be reduced while maintaining the attachment strength. .

  7 to 14 are also provided with bent portions and low-strength portions as in the embodiments of FIGS. 5 and 6, and the first cylinders 80 and 100 and the second cylinder at the time of a frontal collision. The safety of the passenger compartment can be improved by bending and deforming the bodies 82 and 102 so as to protrude upward.

  As mentioned above, although the Example of this invention was described in detail based on drawing, these are one Embodiment to the last, This invention is implemented in the aspect which added the various change and improvement based on the knowledge of those skilled in the art. be able to.

  10: left side of vehicle 12: windshield 18: fixed window 20: front pillar 22: center pillar 24: front pillar lower 26, 80, 100: first cylinder 28, 82, 102: second cylinder 54 : Weather strip 60: Junction part 62: Bending part 70: Bending part 72, 74: Low strength part 84, 86, 104, 106: Projection

Claims (7)

In the vehicle body side structure in which a fixed window is provided on the front pillar,
The front pillar is
It is provided along the side edge of the windshield including the upper position of the fixed window, is curved so as to bulge upward on the vehicle and reaches the upper part of the center pillar. A hollow first cylindrical body fixed to the upper part of the center pillar;
The fixed window is provided in the vertical direction along the edge of the fixed window on the vehicle rear side, and is bent toward the vehicle rear side toward the upper side so as to be parallel to the first cylindrical body. A hollow second cylindrical body that is disposed along the first cylindrical body toward both ends of the front pillar lower and the center pillar.
And at least the second cylindrical body joins the first cylindrical body from the vehicle rear portion of the fixed window, and the joining where the first cylindrical body and the second cylindrical body join each other. A vehicle body side structure characterized in that the part is made stronger by heat treatment. At least one of the first cylindrical body and the second cylindrical body is preferentially bent and deformed by a load at the time of a frontal collision at an intermediate position between the joining portion and the end portion on the center pillar side. The vehicle body side part structure according to claim 1, wherein a bent part is provided. In at least one of the first cylinder and the second cylinder, both sides are strengthened by the heat treatment at an intermediate position between the joining portion and the end portion on the center pillar side. The vehicle body side part structure according to claim 1, wherein a low-strength portion that is locally low-strength and is preferentially bent and deformed by a load at the time of a frontal collision is provided. The first cylindrical body and the second cylindrical body are each provided with a protrusion protruding toward the outer peripheral side in the longitudinal direction of the cylindrical body. Vehicle body side structure as described in 1. Between the joining portion where the first cylindrical body and the second cylindrical body are arranged side by side and the end portion on the center pillar side, the protrusions provided on the cylindrical bodies are in contact with each other. The vehicle body side part structure according to claim 4, wherein the vehicle body side part structure is overlapped and welded. Between the joining portion where the first cylindrical body and the second cylindrical body are branched from each other and the end portion on the front pillar lower side, the fixed window is provided on the protrusion provided in each cylindrical body. The vehicle body side part structure according to claim 4 or 5, wherein: The windshield is attached to the ridge of the first cylindrical body,
The vehicle body side part structure according to claim 4, wherein a weather strip is attached to the protrusion of the second cylindrical body.

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