JP5839539B2 - Seat belt device for vehicle - Google Patents

Description

  The present invention relates to a seat belt device in a vehicle in which a shoulder anchor for hanging a seat belt is attached to a rear header panel that constitutes a rear upper part of a vehicle body. This is to ensure good restraint performance due to the above.

  Conventionally, there is a seat belt device in the vehicle described in Patent Document 1 below. According to this publication, there is provided a rear header panel that constitutes the rear upper part of the vehicle body and extends in the width direction of the vehicle body and is supported at both ends of the left and right side walls of the vehicle body. A shoulder anchor for hanging the seat belt is attached to one side of the rear header panel in the width direction of the vehicle body.

  In the above configuration, when the vehicle travels, a seated person on the seat in the passenger compartment is normally held on the seat by the seat belt. When the vehicle collides with a certain object located in front of the vehicle while traveling forward (front collision), the seated person tries to move forward from above the seat by the inertial force. Then, first, based on the inertial force, a tensile force is applied to the seat belt toward the front. The tensile force is supported by the rear header panel via the seat belt and an anchor for hanging the seat belt. As a result, the forward movement of the seated person from above the seat is prevented, and the seated person is maintained and protected while being restrained on the seat.

JP 2000-168498 A

  By the way, as described above, at the time of the front collision, the tensile force applied to the seat belt is supported by the rear header panel via the seat belt and the shoulder anchor, but when the tensile force is large, the rear header panel In the shoulder anchor attachment portion, stress concentration based on the tensile force tends to occur. Due to this stress concentration, the shoulder anchor mounting portion of the rear header panel is largely bent forward, and the rear header panel may be deformed into a dogleg shape in a plan view of the vehicle body.

  As described above, when the rear header panel is deformed into a U shape so that the shoulder anchor mounting portion of the rear header panel protrudes forward, the shoulder anchor is suspended from the shoulder anchor. As a result, the restraint performance of the seat belt device with respect to a seated person on the seat may be lowered.

  Therefore, a reinforcing panel is provided on the rear header panel as in the prior art described above, and in addition to this, the thickness of the reinforcing panel is increased to improve the strength and rigidity of the rear header panel. Therefore, it can be considered that the rear header panel is not easily bent and deformed at the time of a front collision. However, simply doing this is not preferable because the number of parts of the seat belt device is increased and the configuration becomes complicated and the mass becomes heavy.

  The present invention has been made paying attention to the above situation, and an object of the present invention is to provide a seat belt in a vehicle in which a shoulder header for hanging a seat belt is attached to a rear header panel constituting a rear upper part of a vehicle body. In the device, it is to ensure good restraint performance by the seat belt device at the time of a frontal collision of the vehicle, and to achieve this with a simple configuration.

The invention according to claim 1, together constituting a rear upper of the vehicle body 2, the rear header panel 5 which is supported at both ends on the right and left side walls 4 of the vehicle body 2 to extend in the width direction of the vehicle body 2 is provided, the rear header panel In the seat belt device for a vehicle in which a shoulder anchor 26 for hanging the seat belt 33 is attached to one side portion in the width direction of the vehicle body 2, in one side portion of the rear header panel 5 in the width direction of the vehicle body 2. the rigidity cross point 39 is formed in the vicinity of the mounting portion of the shoulder belt anchor 26, the other side of the rear header panel 5 remote from the mounting portion of the rigid cross point 39 and the shoulder anchor 26, the rigid cross the point 39 are separately other rigid cross point 40 is formed, and the rigid cross point 40 of one side of the rigid cross point 39 and the other side portion of the rear header panel 5, the vehicle body center 7 A seat belt device of a vehicle, characterized in that formed on the opposite sides as a reference.

  In addition, in this section, the reference numerals and drawing numbers appended to the above terms are not intended to limit the technical scope of the present invention to the “Example” section and the contents of the drawings described later.

  The effects of the present invention are as follows.

The invention according to claim 1, together constituting the upper rear portion of the vehicle body, and the rear header panel is provided which is supported at both ends on the right and left side walls of the vehicle body extending in the width direction of the vehicle body, the width direction of the vehicle body of the rear header panel In a seatbelt device for a vehicle in which a shoulder anchor for hanging a seatbelt is attached to one side of the vehicle, rigidity is provided in the vicinity of the shoulder anchor attachment portion on one side of the rear header panel in the width direction of the vehicle body. to form a cross point, the other side of the rear header panel away from the mounting portion of the rigid cross point and the shoulder anchor, and the rigid cross point separately form another rigid cross point, the Riyahedda A rigid break point on one side of the panel and a rigid break point on the other side are formed on opposite sides with respect to the center of the vehicle body , and the following effects are produced.

  That is, when the seated person is restrained by the seat belt device on the seat, when the seated person restrained on the seat at the time of the frontal collision of the vehicle tries to move forward from the seat by the inertia force, Based on the inertial force, a tensile force is applied to the seat belt to move forward. And this tensile force is supported by the attachment part of the shoulder anchor with respect to the said rear header panel via the said seatbelt and a shoulder anchor. Then, at this time, due to the tensile force, stress concentration occurs in the formation portion of the rigid break point of the shoulder anchor mounting portion in the rear header panel, and the formation portion of the rigid break point tends to be bent forward. To do. Further, at the same time that the portion where the rigid break point is formed is bent, the tensile force causes stress concentration in the portion where the other rigid break point is formed in the rear header panel. The formation part also tries to bend toward the front.

  As a result, each of the rigid break point forming portions of the rear header panel is bent forward, and thus the rear header panel tends to be deformed into a trapezoidal mountain shape toward the front in a plan view of the vehicle body. It becomes.

  Therefore, at the time of the front collision, in the conventional technique, only the mounting portion of the shoulder anchor in the rear header panel is largely bent forward, and the rear header panel is deformed into a dogleg shape in a plan view of the vehicle body. The shoulder anchor and the portion of the seat belt suspended from the shoulder anchor may move forward greatly. According to the invention, the rear header panel is trapezoidal as described above. Accordingly, the forward movement of the shoulder anchor and the portion of the seat belt suspended from the shoulder anchor is suppressed to be relatively small. As a result, good restraint performance by the seat belt device for a seated person on the seat is ensured.

  In addition, ensuring the good restraint performance by the above-described seat belt device is not to simply reinforce the rear header panel with a separate reinforcing material or the like, but as described above, in the width direction of the vehicle body, This is achieved by forming a rigid break point in the vicinity of the shoulder anchor attachment portion in the side portion and forming another rigid break point in the other side portion of the rear header panel. Therefore, securing of the above-mentioned good restraint performance can be achieved at a low cost while preventing an increase in the number of parts of the seat belt device and a simple configuration and suppressing an increase in mass.

It is a top view of a vehicle body rear part. It is a side view of a vehicle body rear part. It is a perspective view of a vehicle body rear part. FIG. 4 is an enlarged sectional view taken along line IV-IV in FIG. 1. FIG. 5 is a partial perspective development view of what is shown in FIG. 4.

  The present invention relates to a seat belt apparatus for a vehicle according to the present invention. In a seat belt apparatus for a vehicle in which a shoulder anchor for hanging a seat belt is attached to a rear header panel constituting the rear upper part of the vehicle body, In order to achieve the object of ensuring good restraining performance and achieving this with a simple configuration, a mode for carrying out the present invention is as follows.

That is, in the seat belt apparatus in the vehicle, as well as constituting the upper after the vehicle body, a rear header panel is provided which is supported at both ends on the right and left side walls of the vehicle body to extend in the width direction of the vehicle body. A shoulder anchor for hanging the seat belt is attached to one side of the rear header panel in the width direction of the vehicle body. The width direction of the vehicle body, the rigid cross point in the vicinity portion of the mounting portion of the shoulder belt anchor at one side of the rear header panel is formed Rutotomoni, the Riyahedda away from the mounting portion of the rigid cross point and the shoulder anchor Another rigid break point is formed on the other side of the panel separately from the rigid break point. Further, a rigid break point on one side of the rear header panel and a rigid break point on the other side are formed on opposite sides with respect to the center of the vehicle body.

  In order to explain the present invention in more detail, an embodiment thereof will be described with reference to the accompanying drawings.

  In the figure, reference numeral 1 denotes a vehicle exemplified by an automobile, and an arrow Fr indicates the front in the traveling direction of the vehicle 1. The left and right described below refer to the width direction of the vehicle body 2 toward the front of the vehicle 1.

  The vehicle body 2 of the vehicle 1 is made of sheet metal. The vehicle body 2 includes a floor panel 3 supported on a vehicle body frame (not shown), and left and right side walls 4 extending upward from each side of the floor panel 3. A rear header panel 5 that constitutes a rear upper portion of the vehicle body 2, extends linearly in the width direction of the vehicle body 2, is joined to each rear portion of the left and right side walls 4 by spot welding S 1 and is supported at both ends, And a roof panel 6 supported by the rear header panel 5. The rear portion of each side wall 4 is called a rear pillar, and constitutes a skeleton member of the vehicle body 2 together with the rear header panel 5. 1 is the center of the vehicle body in the width direction of the vehicle body 2.

  A space inside the vehicle body 2 surrounded by the floor panel 3, the side walls 4, the rear header panel 5, and the roof panel 6 is a vehicle compartment 9. A back door opening 10 is formed on the rear wall of the vehicle body 2 so as to allow the vehicle compartment 9 and the rear area of the vehicle body 2 to communicate with each other. A back door 11 that closes the back door opening 10 so as to be openable and closable is provided. The rear header panel 5 and the rear edge of the roof panel 6 are connected to each other by spot welding S2, and the rear edge of the rear header panel 5 and the roof panel 6 is an upper opening of the back door opening 10. An edge is formed.

  The rear header panel 5 includes a reinforcing panel 14 and an inner panel 15 that face each other in the vertical direction and are connected to each other by spot welding S3 and S4. The reinforcing panel 14 reinforces the inner panel 15. Further, the cross section of each part of the rear header panel 5 in the longitudinal direction (in the width direction of the vehicle body 2) has a hollow closed cross section.

  In the side view of the vehicle body 2 (FIG. 4), the reinforcing panel 14 constitutes a front part 14a that extends substantially horizontally and forms a front part thereof, and constitutes a midway part in the front-rear direction of the reinforcing panel 14 and the front part. A middle panel 14b extending downward from the rear edge of the rear panel 14a, and a rear part of the reinforcing panel 14 so as to be integrated rearward from the lower edge of the middle panel 14b. And a rear panel 14c extending in a general manner. The reinforcing panel 14 is provided so as to be biased to one side (right side) in the width direction of the vehicle body 2.

  In the side view of the vehicle body 2 (FIG. 1), the inner panel 15 has an inverted hat shape, forms a middle part in the front-rear direction and extends substantially horizontally, and the front panel from the front edge of the bottom panel 15a. A front panel 15b that extends integrally upward, a rear panel 15c that integrally extends rearwardly from the rear edge of the bottom panel 15a, and the front and rear panels 15b, 15c. Before and after being integrally formed at each upper edge of each of the outer flanges 15d and 15e, and a plurality of (in a longitudinally central portion of the outward flange 15d are bent so as to bulge upward ( Three pedestals 15f are formed at a predetermined pitch. Each end portion of the inner panel 15 in the longitudinal direction (the width direction of the vehicle body 2) is coupled to each rear portion of the left and right side walls 4 by the spot welding S1, and is supported at both ends.

  The rear outward flange 15e of the inner panel 15 of the rear header panel 5 and the rear edge of the roof panel 6 are spot welded S2. The front edge of the front panel 14a of the reinforcing panel 14 and the front outward flange 15d of the inner panel 15 are spot welded S3. Further, the rear panel 14c of the reinforcing panel 14 and the bottom panel 15a of the inner panel 15 are overlapped with each other and are spot-welded S4. Each pedestal 15f of the inner panel 15 of the rear header panel 5 and the roof panel 6 are coupled to each other by a mastic material 16 interposed therebetween, and the roof panel 6 is supported on the rear header panel 5. Yes. As a result, the combination of the rear edge of the roof panel 6 and the inner panel 15 of the rear header panel 5 (the upper opening edge of the back door opening 10) is in the longitudinal direction (the width direction of the vehicle body 2). Each section has a hollow closed cross-sectional shape.

  A rear seat 18 on which a plurality of (three persons) seaters 17 can be seated forward is provided at the rear end of the passenger compartment 9. The seat 18 includes a seat cushion 19 supported on the floor panel 3 and a seat back 20 extending upward from the rear end side of the seat cushion 19. The left and right side portions of the seat 18 are side seats 21, and the center portion in the width direction of the vehicle body 2 is a center seat 22.

  Each of the side seats 21 and the central seat 22 is provided with a three-point seat belt device 25. The seat belt device 25 of the central seat 22 will be described.

  The seat belt device 25 is a portion of the rear header panel 5 at the rear upper side of the right side portion of the central seat 22, and is an overlapping portion of the rear panel 14 c of the reinforcing panel 14 and the bottom panel 15 a of the inner panel 15. A shoulder anchor 26 fixed to the side anchor 27, a side anchor 27 attached to the right side wall 4 of the shoulder anchor 26, and a retractor 28 positioned below the side anchor 27 and fixed to the lower portion of the side wall 4. A lap anchor 29 connected to the floor panel 3 at the rear lower side of the right side portion of the central seat 22 and another lap connected to the floor panel 3 at the lower rear side of the central seat 22. Anchor 30, buckle 31 supported by lap anchor 29, and other supported by other lap anchor 30 And a buckle 32.

  The shoulder anchor 26 extends in the vertical direction, and an upper end of the shoulder anchor 26 is fastened to the overlapping portion of the rear panel 14c of the reinforcing panel 14 and the bottom panel 15a of the inner panel 15 by fastening. 26 a and an anchor plate 26 b that is fixed to the lower end portion of the support shaft 26 a and is suspended through the seat belt 33.

  The seat belt device 25 has one end elastically wound around the retractor 28, and the other end side is passed through the side anchor 27 and the shoulder anchor 26 in sequence and suspended. A seat belt 33 extending to the lap anchor 29 side, a tongue plate 34 attached to the extending end of the seat belt 33 and detachably locked to the buckle 31, the shoulder anchor 26 and the lap anchor 29, and another tongue plate 35 that is externally fitted to the seat belt 33 and the other buckle 32.

  In the width direction of the vehicle body 2, a rigid break point 39 is formed in the vicinity of the mounting portion of the shoulder anchor 26 on one side (right side) of the rear header panel 5. Further, another rigid break point 40 is formed on the other side (left side) of the rear header panel 5. The left and right rigid break points 39 and 40 are formed in the respective parts of the rear header panel 5 at symmetrical positions with respect to the vehicle body center 7 as a reference.

  The rigid break point 39 will be specifically described. A plurality of (three) cutouts 42 are formed on the front edge of the front panel 14a of the reinforcing panel 14 of the rear header panel 5 so as to avoid the pedestals 15f of the inner panel 15 respectively. The rigid break point 39 is constituted by one notch 42 in which one side portion (right side portion) of the rear header panel 5 is positioned at the end of the plurality of notches 42. On the other hand, a draining recess 43 that is recessed downward is formed at the rear edge of the roof panel 6 (upper opening edge of the back door opening 10). This draining recess 43 is for collecting water such as rain flowing in the width direction of the vehicle body 2 on the rear edge of the roof panel 6 and smoothly draining it to the outside of the vehicle body 2. In addition, a fitting recess 44 for fitting the bottom of the draining recess 43 is formed in a bent portion formed by the rear panel 15c and the outward flange 15e of the inner panel 15 of the rear header panel 5, and this The rigid break point 39 is also formed by the fitting recess 44.

  Specifically, the other rigid break point 40 is configured by another insertion recess 45 having the same configuration as the insertion recess 44 formed in the inner panel 15 of the rear header panel 5. The end of one side (right side) of the reinforcing panel 14 of the rear header panel 5 is coupled to the side wall 4 of the right side, but the other side (left side) of the reinforcing panel 14 is An end portion 14 d joined to the upper surface of the front portion of the inner panel 15 is positioned in the vicinity of the other insertion recess 45 in the width direction of the vehicle body 2. As a result, the rigidity of the rear header panel 5 around the end portion 14d of the other side of the reinforcing panel 14 is greatly changed in the width direction of the vehicle body 2. It is composed.

  When restraining the seated person 17 on the central seat 22 of the seat 18 by the seat belt device 25, first, the portion of the seat belt 33 from the shoulder anchor 26 to the lap anchor 29 is placed on the seated person. 17, the other tongue plate 35 is locked to the other buckle 32, and the seat belt 33 is elastically pulled by the retractor 28 as a whole. Then, the seated person 17 is restrained on the central seat 22 by the seat belt device 25.

  It is assumed that the vehicle 1 has collided forward with the seated person 17 being restrained by the seat belt device 25 on the central seat 22 of the seat 18. In this case, the occupant 17 on the central seat 22 tends to move forward from the central seat 22 due to its inertial force (dashed line in FIG. 2). Then, first, based on the inertial force of the seated person 17, a tensile force F that tends to move forward is quickly applied to the seat belt 33, and the retractor 28 causes the retractor to pull the retractor 28. The feeding of the seat belt 33 from 28 is locked. The tensile force F is supported by the mounting portion of the shoulder anchor 26 with respect to the rear header panel 5 via the seat belt 33 and the shoulder anchor 26. Thereby, the restraint state by the seat belt 33 of the seated person 17 on the seat 18 is maintained.

  Here, when the tensile force F is large, the tensile force F causes stress concentration in the portion where the rigid anchor point 39 of the attachment portion of the shoulder anchor 26 in the rear header panel 5 is formed. The formation part of the point 39 tends to bend toward the front. Further, at the same time that the portion where the rigid break point 39 is formed is bent, the tensile force F causes stress concentration in the portion where the other rigid break point 40 is formed in the rear header panel 5. The portion where the rigid break point 40 is formed also tends to bend forward.

  As a result, the portions where the respective rigid break points 39 and 40 are formed in the rear header panel 5 are bent forward, so that the rear header panel 5 has a trapezoidal shape toward the front in a plan view of the vehicle body 2. It tends to be deformed into a mountain shape (dashed line in FIG. 1).

  Therefore, at the time of the front collision, in the conventional technique, only the mounting portion of the shoulder anchor 26 in the rear header panel 5 is greatly bent toward the front, and the rear header panel 5 has a dogleg shape in plan view of the vehicle body 2. Due to the deformation (three-dot chain line in FIG. 1), there is a possibility that the shoulder anchor 26 and the portion of the seat belt 33 suspended from the shoulder anchor 26 may largely move forward. According to the configuration, as described above, when the rear header panel 5 is deformed into a trapezoidal mountain shape, the shoulder anchor 26 and the portion of the seat belt 33 suspended from the shoulder anchor 26 are moved forward. Relatively small. As a result, good restraint performance by the seat belt device 25 for the seated person 17 on the seat 18 is ensured.

  The rigid break point 39 is constituted by a notch 42 and a fitting recess 44 formed at the front and rear edges of one side of the rear header panel 5, and the other rigid break point 44. The point 40 is also constituted by an end portion 14d of the reinforcing panel 14 and other fitting recesses 45, in which the front and rear edge portions of the other side portion of the rear header panel 5 are respectively formed on the crocodile.

  For this reason, as described above, when a forward pulling force F is applied from the seat belt 33 to the shoulder anchor 26 at the time of the front collision, the front side of the rear header panel 5 and the other side of the front side, respectively, Since the stress concentration occurs at each of the rigid break points 39 and 40 formed at the rear edge of the alligator, the rear header panel 5 is more reliably trapezoidally shaped toward the front in the plan view of the vehicle body 2. It will be deformed to have a shape. Therefore, the forward movement of the shoulder anchor 26 and the portion of the seat belt 33 suspended from the shoulder anchor 26 is more reliably suppressed to be small, and as a result, the good restraining performance by the seat belt device 25 is further improved. Secured surely.

  Moreover, the respective rigid break points 39 and 40 are formed in the respective portions of the rear header panel 5 at symmetrical positions with respect to the vehicle body center 7 as a reference.

  Therefore, as described above, a tensile force F directed forward from the seat belt 33 to the shoulder anchor 26 is applied at the time of the front collision, and the rear header panel 5 is trapezoidal toward the front in a plan view of the vehicle body 2. When deformed into a mountain shape, the trapezoidal mountain shape is more reliably left-right symmetric. Therefore, the forward movement of the shoulder anchor 26 and the portion of the seat belt 33 suspended from the shoulder anchor 26 is more reliably suppressed to be small, and as a result, the good restraining performance by the seat belt device 25 is further improved. Secured surely.

  Further, the above configuration is useful for a small and light vehicle in which the excess space of the passenger compartment 9 is narrow and it is difficult to take a cross section of each part of the rear header panel 5 in the longitudinal direction.

  In addition, the above-described seat belt device 25 ensures good restraining performance by not simply reinforcing the rear header panel 5 with a separate reinforcing material or the like, but in the width direction of the vehicle body 2 as described above. This is achieved by forming a rigid break point 39 in the vicinity of the mounting portion of the shoulder anchor 26 on one side of the panel 5 and forming another rigid break point 40 on the other side of the rear header panel 5. . Therefore, securing of the above-described good restraining performance can be achieved at a low cost while preventing an increase in the number of parts of the seat belt device 25 with a simple configuration and suppressing an increase in mass.

  Although the above is based on the illustrated example, the rigid break point 39 may be configured by only one of the notch 42 and the insertion recess 44. Further, in the other rigid break points 40, the other insertion recesses 45 may not be provided, but the reinforcing panel 14 of the rear header panel 5 is extended in the width direction of the vehicle body 2 and is erected on the left and right side walls 4, and is described above. You may comprise only the other insertion recessed part 45. FIG. Each of the rigid break points 39, 40 may be formed of a recess, a bead, another notch, or a thin wall formed in the reinforcing panel 14 and / or the inner panel 15 of the rear header panel 5.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Car body 3 Floor panel 4 Side wall 5 Rear header panel 6 Roof panel 7 Car body center 9 Car compartment 14 Reinforcement panel 14a Front panel 14b Middle panel 14c Rear panel 14d End 15 Inner panel 15a Bottom panel 15b Front panel 15c Rear panel 15d Outward flange 15e Outward flange 15f Pedestal 16 Mastic material 17 Seated person 18 Seat 22 Center seat 25 Seat belt device 26 Shoulder anchor 33 Seat belt 39 Rigid break 40 Rigid break 42 Notch 43 Drainage recess 44 Fit Recess 45 Insertion recess F Tensile force S1-S4 Spot welding

Claims (1)

Together they constitute the upper rear portion of the vehicle body, and the rear header panel is provided which is supported at both ends on the right and left side walls of the vehicle body extending in the width direction of the vehicle body, the seat belt on one side in the width direction of the vehicle body of the rear header panel In a seat belt device in a vehicle to which a shoulder anchor for hanging is attached,
In the width direction of the vehicle body, a rigid break point that is easier to bend than other parts is formed in the vicinity of the shoulder anchor mounting portion on one side of the rear header panel, and the rigid break point and the shoulder anchor. on the other side of the rear header panel away from the mounting portion of, separately from the rigid cross point is formed with other rigid cross point, stiffness cross point of one side of the rear header panel and the other side A seatbelt device in a vehicle , wherein the rigid breakpoints of the portions are formed on opposite sides with respect to the center of the vehicle body .

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