JP6503873B2 - Seat back panel structure - Google Patents

Description

  The present invention relates to the structure of a seat back panel made of a resin material.

  The vehicle seat has a seat cushion on which the occupant sits and a seat back supporting the upper limbs of the occupant. As a seat back panel which constitutes a seat back, for example, as disclosed in Patent Literature 1, one formed of a fiber reinforced resin is known.

  The seat back panel which constitutes the seat back is provided with a belt passing portion which is a portion on which the webbing belt of the seat belt abuts. With regard to the configuration of such a belt passing portion, for example, those disclosed in Patent Documents 2 and 3 etc. are known. In the examples disclosed in these, the belt passing portion is configured by joining a plurality of parts. The joining here includes fitting and the like.

  The plurality of parts arranged around the belt passing portion are assembled by welding or bonding. In the examples disclosed in Patent Documents 2 and 3, the strength of the belt passing portion is largely affected by the joint strength of the seat back frame and the holding mechanism attachment portion. Therefore, when a large load acts on the seat belt, there is a possibility that the seat back panel may be broken due to peeling of the joint portion of the seat back panel and the holding mechanism attachment portion which is less than the strength of the base material.

JP, 2011-178300, A JP, 2012-162224, A JP 2012-152225 A

  The belt passing portion provided in the seat back panel is adjacent to a retractor storage portion for storing a seat belt retractor. The retractor storage portion is in the form of a deep-draw formed by indenting a part of a resin seat back panel.

  On the other hand, when the sheet back panel is formed of a material such as FRP (fiber reinforced resin), the panel is formed by heating and softening the sheeted resin material and sandwiching it in a mold (stampable molding) There is a method of forming by

  In stampable molding, a heated resin sheet is placed in a mold, and the upper mold is lowered to shape the shape of a molded article. When the throttling of the retractor storage unit is deep, defects such as wrinkles may occur due to the excess material when the sheet-like material is formed. If such wrinkles are generated in the deep-drawing molding process, the resin material cools and solidifies before the resin material is crushed to a predetermined thickness by the press, and as a result, it is possible to inhibit the descent of the mold at the time of pressing There is sex. In such a state, it is difficult to stabilize the quality of the molded product without the molding pressure acting on the entire molded product (product).

  In order to prevent such wrinkles, for example, the thickness of the belt passing portion adjacent to the retractor storage portion can be coped with by thickening to absorb the excess volume of the buttocks. However, this thickening may result in an unnecessary thickening in the performance of the belt passing portion. Furthermore, in the case where the belt passing portion is formed in a flat surface, it is necessary to attach and cope with other parts for preventing the belt of the seat belt from swinging to the left and right. These are factors that increase costs.

  The present invention has been made to solve the above problems, and it is an object of the present invention to form a deep drawn structure of a retractor storage portion of a resin seat back panel by stampable molding. It is an object of the present invention to provide a seat back panel structure capable of forming the circumferential thickness uniformly and improving the rigidity of the belt passing portion.

  In order to achieve the above object, a seat back panel structure according to the present invention is a seat back panel structure made of a resin material, wherein one side of the seat back panel can be recessed to be able to store a seat belt retractor. A shape of the retractor storage portion is provided, and a webbing passage surface, to which a webbing belt extending from the retractor abuts, is provided at an end portion of the seat back panel so as to be continuous with an end portion of the retractor storage portion. In the webbing passage surface, on both sides in the width direction of the webbing belt, there are provided projection shaped portions that project in the opposite direction to the recessed direction of the retractor storage portion, and the projection shaped portions are the retractor It extends from the storage towards the end of the seat back panel.

  In one aspect of the seat back panel structure according to the present invention, the retractor storage portion is rectangular, and one longitudinal end of the protrusion-shaped portion is connected to the webbing passage surface. It is arranged at the corner.

  Further, in one aspect of the seat back panel structure according to the present invention, of the cross-sectional shapes in the width direction of the webbing belt of the protrusion-shaped portion, the cross-sectional shape closer to the webbing belt is with respect to the webbing passage surface. It is standing.

  Further, in one aspect of the seat back panel structure according to the present invention, of the cross-sectional shapes in the width direction of the webbing belt of the protrusion-shaped portion, the cross-sectional shape farther from the webbing belt is from the top of the protrusion-shaped portion It inclines in the direction away from the said webbing passage side as it goes to a root part.

  Further, in one aspect of the seat back panel structure according to the present invention, the seat back panel includes a plurality of panels including a first panel and a second panel, and the first panel and the second panel overlap each other. In the state of being joined, the projection shaped portion is disposed on one surface of the first panel, and the second panel is joined on the back side of the portion where the projection shaped portion is disposed. Department is arranged.

  In one aspect of the seat back panel structure according to the present invention, the surface of the second panel to be joined to the first panel has a concave shape recessed in a direction away from the webbing passage surface of the first panel. A portion is provided, and an end of the concave portion is joined to the joint portion of the first panel, and the first panel and the second panel are formed by the concave portion of the second panel, A hollow cross-sectional portion is configured in a state of being superimposed on the back surface side of the webbing passage surface of the first panel.

  According to the present invention, since the projection shaped portion plays a reinforcing role in the continuous portion where the concave retractor storage portion, in which the rigidity tends to be disadvantageous, and the webbing passage surface are continuously connected, the seat back The rigidity of the panel seat belt retractor near the webbing belt exit is improved.

  According to one aspect of the present invention, by arranging one end of the projection-shaped portion at the corner of the retractor storage portion which is a deep drawing portion where wrinkles easily occur, the generation of wrinkles at the rectangular corner is prevented. be able to. This prevents the occurrence of irregularities in the webbing passage surface, making it possible to obtain a smooth webbing passage surface. In addition, it is possible to prevent the decrease in rigidity due to the generation of wrinkles and to prevent the panel from being buckled by the load exerted on the webbing passage surface by the webbing belt. In addition, it is also possible to prevent variations in strength due to the degree of drop of wrinkles in each product.

  According to one aspect of the present invention, the cross-sectional shape on the side of the webbing belt in the cross-sectional shape of the projection-shaped portion is erected on the webbing passage surface, whereby the projection-shaped portion serves as a guide for the webbing belt and the webbing belt is in the width direction It becomes possible to prevent shifting.

  According to one aspect of the present invention, by inclining the side of the cross-sectional shape of the projection-shaped portion away from the webbing, it is possible to increase the cross-sectional area capable of absorbing the surplus portion of the resin material to be wrinkled. The rigidity can be improved by suppressing a rapid change in the thickness of the plate around the. As a result, even when a load is applied from the webbing, it is possible to prevent the seat back panel from being damaged.

  According to one aspect of the present invention, by arranging the joint portion of the panel on the back side of the projection shape portion, the projection shape portion secures a part (or all) of the load and reduces the load acting on the joint portion. Thus, the shape rigidity can be efficiently improved. In addition, it is also possible to prevent peeling of the joint.

  According to one aspect of the present invention, by providing the hollow cross section at a position corresponding to the webbing passage surface, it is possible to improve the strength of the webbing passage surface, and even when a load is applied to the webbing belt, It is possible to prevent the buckling of the resin panel.

It is a perspective view when the seat back panel structure concerning the present invention is seen from the vehicles back. It is the expansion perspective view which expanded the A section of FIG. It is the front view which looked at the periphery of the retractor storage part of FIG. 2 from the vehicle back. It is a BB sectional view of FIG. It is the front view which looked at the front panel of FIG. 1 from the vehicle front. It is the front view which looked at the rear panel of FIG. 1 from the vehicle rear.

  An embodiment of a seat back panel structure according to the present invention will be described below with reference to the drawings (FIGS. 1 to 6). The seat back of the present embodiment describes a seat back of a rear seat for a vehicle.

  The seat back panel 1 constituting the seat back of the present embodiment has a front panel 20 made of resin and a rear panel 10 made of resin. The seat back panel 1 is configured by overlapping the front panel 20 and the rear panel 10 in the longitudinal direction of the vehicle as shown in FIG. 5 and 6 in the front panel 20 and the rear panel 10, the right end of the front panel 20 in FIG. 5 and the left end of the rear panel 10 in FIG. 6 overlap. Further, the retractor storage portion 11 of the rear panel 10, which will be described later, is disposed so as to overlap the retractor projecting portion 21 of the front panel 20.

  Here, each panel 10, 20 is formed of, for example, a fiber reinforced resin material such as FRP (fiber reinforced plastics). It is possible to form using various thermoplastic resins, such as PP, PA6, PA12, PA66, PEEK, PC, and PET, as a matrix resin of a fiber reinforced resin material.

  First, the structure of the rear panel 10 will be described. The rear panel 10 is a substantially rectangular plate-like member made of the above-described resin material and, as shown in FIGS. 1 and 6, extends in the vehicle width direction. As described above, stampable molding is used as a method of molding the rear panel.

  A retractor storage portion 11 for storing a retractor 30 of a seat belt device mounted on a vehicle rear seat is provided on the vehicle upper portion of the rear panel 10. The retractor storage portion 11 is disposed slightly to the right of the center of the panel in FIG. A webbing passage surface 13 on which the webbing belt 31 of the seat belt device abuts is formed above the vehicle of the retractor storage unit 11. The details of the webbing passage surface 13 will be described later.

  The retractor 30 is one of members constituting a seat belt device attached to a vehicle rear seat, one end of the webbing belt 31 is connected, and the webbing belt 31 is wound so as to be drawn out. The retractor 30 is accommodated in a retractor accommodating portion 11 provided in the rear panel 10 and attached by a bolt or the like. The webbing belt 31 in the present embodiment is pulled out from the upper part of the vehicle of the retractor 30, as shown in FIG. In this example, it is pulled out from the opening 30 b of the vehicle upper part of the cover 30 a covering the retractor 30. The description of the other components of the seat belt device is omitted.

  Here, the structure of the retractor storage unit 11 will be described. As described above, the retractor storage portion 11 is disposed near the center in the vehicle width direction of the vehicle upper portion of the rear panel 10, and has a concave shape in which the rear surface of the rear panel 10 is recessed forward. Further, the retractor storage portion 11 is a portion to be deep-drawn in stampable molding. Further, the periphery of the retractor storage portion 11 is formed of a flat surface so that molding pressure can be efficiently transmitted at the time of stampable molding.

  Moreover, the shape of the vehicle backward view of the retractor storage part 11 is a rectangle (substantially rectangular shape), and the attachment part 11c for attaching the retractor 30 is provided in the vehicle lower part of the retractor storage part 11 . The mounting portion 11c is provided with a through hole 11d. Although the detailed description is omitted, as shown in FIG. 1, the retractor 30 is attached to the through hole 11 d of the attaching portion 11 c by a bolt, a nut or the like in a state of being disposed inside the retractor storage portion 11 It is covered by the cover 30a etc. as mentioned above.

  Subsequently, the webbing passage surface 13 will be described. The webbing passage surface 13 is a surface on which the webbing belt 31 pulled out from the retractor 30 shown in FIG. 1 abuts, and as shown in FIG. 2, is a flat vehicle rear surface formed above the vehicle of the retractor storage 11. is there. When the webbing belt 31 is pulled out of the retractor 30, the webbing belt 31 passes while being in contact with the webbing passage surface 13.

  The webbing passage surface 13 continuously extends from the upper end 11 a of the retractor storage portion 11 to the upper side of the vehicle. The upper end 11 a corresponds to the upper side of the rectangle of the retractor housing 11 extending in the vehicle width direction. In this example, the webbing passage surface 13 continuously extends above the vehicle from the upper side portion.

  On the other hand, as shown in FIG. 6, the vehicle upper portion of the rear panel 10 is formed with a level difference in front of the center of the panel of the rear panel 10. That is, the vehicle upper portion of the rear panel 10 is disposed forward of the central portion of the panel. As shown in FIG. 2, FIG. 3 and FIG. 6, a flat surface 10a facing the rear of the vehicle on a portion of the step which is disposed in front of the center of the panel than the central portion of the panel, i.e. Is formed. A part of the flat surface 10 a protrudes upward of the vehicle, and the flat surface 10 a of the protruding part becomes the webbing passage surface 13.

  As shown in FIG. 3, the webbing passage surface 13 has a trapezoidal shape in which the upper side 13a extending in the vehicle width direction and the lower side are parallel to each other, and the upper side 13a corresponds to the vehicle of the rear panel 10 outside the retractor storage portion 11 in the vehicle width direction. It is disposed above the upper end than the vehicle. That is, the webbing passage surface 13 protrudes above the vehicle from the upper end of the vehicle outside the rear panel 10 in the vehicle width direction. The vehicle width direction length of the webbing passage surface 13 becomes shorter as it goes to the upper side of the vehicle. Both sides 13b of the webbing passage surface 13 are inclined so as to approach each other toward the upper side of the vehicle, as viewed from the rear of the vehicle, as shown in FIG. It is formed in line symmetry with respect to it.

  A pair of projecting portions 15 is provided on the widthwise outer side of the webbing belt 31 in the webbing passage surface 13. Each protrusion shaped portion 15 projects in the opposite direction to the recessed direction of the retractor storage 11, that is, in the rear of the vehicle. The projecting portions 15 are arranged in pairs on each of the side portions 13b of the webbing passage surface 13, and from the upper end 11a of the retractor storage portion 11 toward the vehicle upper end (upper side 13a) of the webbing passage surface 13. , And extends along both sides 13 b of the webbing passage surface 13. The pair of projection-shaped portions 15 are disposed so as to sandwich the webbing belt 31 in contact with the webbing passage surface 13 and extend so as to approach each other as the vehicle is directed upward.

  Thus, by forming the webbing passage surface 13 and providing the projection shape portion 15, the retractor accommodation which becomes a continuous portion between the recessed retractor storage portion 11 and the webbing passage surface 13 in which the rigidity tends to be disadvantageous. In the periphery of the upper end 11 a of the portion 11, the pair of projection shaped portions 15 play a reinforcing role, so the rigidity around the outlet (opening 30 b) of the webbing belt 31 of the retractor 30 is improved. Furthermore, when the rear panel 10 is formed by stampable molding, it is possible to uniformly form the thickness around the retractor accommodation portion 11 to be a deep drawn portion, and to improve the rigidity of the webbing passage surface 13. Is possible.

  The lower end of the vehicle, which is the longitudinal end of the pair of projection-shaped portions 15 in the present embodiment, is disposed at each corner 11b of both sides of the upper end 11a of the retractor storage portion 11 connected to the webbing passage surface 13. . By arranging the projection shape portion 15 at the corner portion 11 b in this manner, it becomes possible to prevent the occurrence of wrinkles in the rectangular corner portion 11 b of the retractor storage portion 11 which is a deep drawing portion where wrinkles easily occur. . As a result, it is possible to prevent the occurrence of unevenness on the webbing passage surface 13 and to obtain a smooth webbing passage surface 13. Moreover, it becomes possible to prevent the fall of the rigidity by a wrinkle. Furthermore, when a load acts on the webbing passage surface 13 due to the contact of the webbing belt 31, the rear panel 10 can be prevented from buckling. In addition, it is also possible to prevent variations in strength due to the degree of drop of wrinkles in each product.

  Further, as shown in FIG. 4, of the cross-sectional shapes of the protruding portion 15 in the width direction of the webbing belt 31, the cross-sectional shape closer to the webbing belt 31 stands substantially perpendicularly to the webbing passage surface 13. ing. Here, the cross-sectional shape closer to the webbing belt 31 corresponds to the inner side wall 15 c on the webbing belt 31 side of each of the projecting portions 15. The respective inner side walls 15 c face each other and extend perpendicularly to the webbing passage surface 13. By forming the inner side wall 15 c of the projection shape portion 15 in this manner, each projection shape portion 15 serves as a guide for the webbing belt 31, and it becomes possible to prevent the webbing belt 31 from being shifted in the vehicle width direction.

  Furthermore, as shown in FIG. 4, of the cross-sectional shapes of the protruding portion 15 in the width direction of the webbing belt 31, the cross-sectional shape of the protruding portion 15 away from the webbing belt 31 is from the top 15 a of the protruding portion 15 toward the root 15 b As a result, it is inclined in the direction away from the webbing passage surface 13. Here, the cross-sectional shape far from the webbing belt 31 corresponds to the outer wall 15 d on the side of the webbing belt 31 of each of the protruding portions 15. The outer wall 15 d of each protrusion 15 extends away from the webbing passage surface 13 from the top 15 a to the root 15 b of the protrusion 15. The right outer wall 15d in FIG. 4 extends rightwardly from the top 15a to the root 15b of the projection shape 15, and the left outer wall 15d in FIG. 4 extends leftward from the top 15a to the root 15b. ing.

  By forming the outer side wall 15d of the projection shape portion 15 in this manner, it is possible to increase the cross-sectional area capable of absorbing the surplus portion of the resin material to be wrinkles, and also to rapidly change the plate thickness around the webbing passage surface 13. The rigidity can be improved by suppressing. As a result, even when a load is applied from the webbing belt 31, it is possible to prevent the rear panel 10 and the like from being damaged.

  Subsequently, the front panel 20 will be described. As shown in FIG. 5, a retractor projection 21 is provided on the vehicle upper portion of the front panel 20. The retractor protruding portion 21 is disposed at a position corresponding to the retractor storage portion 11 and protrudes forward of the vehicle so as to correspond to the concave shape of the retractor storage portion 11 of the rear panel 10. The vehicle upper portion of the retractor protrusion 21 is a portion overlapping the back surface side of the webbing passage surface 13.

  The front panel 20 is joined to a plurality of joint portions 17 provided on the rear panel 10. One of the joint portions 17 is disposed on the back surface side of the portion of the rear panel 10 where the pair of projection shaped portions 15 are disposed, that is, on the vehicle front surface of the rear panel 10 at a position corresponding to the webbing passage surface 13. Although a detailed description is omitted, a joint portion 17 is also provided on the front panel 20. By arranging the bonding portion 17 as described above, part (or all) of the load is secured by the projection shape portion 15, and the load acting on the bonding portion 17 is reduced to efficiently improve the shape rigidity. Can. In addition, it is possible to prevent the peeling of the bonding portion 17.

  As shown in FIGS. 2, 4 and 5, the vehicle rear surface of the front panel 20 is provided with a concave portion 23 which is recessed in a direction (vehicle front) away from the webbing passage surface 13 of the rear panel 10. The recessed portion 23 is disposed above the vehicle of the retractor protrusion 21 as shown in FIG. 5, and as shown in FIG. 4, the vehicle width direction end of the recessed portion 23 is a joint of the rear panel 10. It is joined to 17. The hollow cross-sectional portion 25 is configured in a state in which the recessed portion 23 of the front panel 20 is superimposed on the back surface side of the webbing passage surface 13 of the rear panel 10. A force transmitted from the webbing belt 31 of the seat belt device to the rear panel 10 and the front panel 20 is applied to the hollow cross-sectional portion 25 by occupant restraint at the time of a vehicle collision or the like.

  By forming the hollow cross section 25 in this manner, the strength of the webbing passage surface 13 can be improved, and even when a load is applied to the webbing belt 31, buckling of the rear panel 10 and the front panel 20 can be prevented.

  As can be understood from the above description, according to the seat back panel structure of the present embodiment, when the deep drawing structure of the retractor housing part 11 of the resin rear panel 10 is formed by stampable molding, the thickness around the deep drawing part It becomes possible to form the thickness uniformly and to improve the rigidity of the webbing passage surface 13.

  The description of the above embodiment is an example for describing the present invention, and does not limit the invention described in the claims. Moreover, each part structure of this invention can be variously deformed within the technical range as described in not only the said embodiment but the claim.

  For example, although the retractor storage portion 11 is provided in the rear panel 10 in the present embodiment, the present invention is not limited to this, and may be provided in the front panel 20. Further, the projection shaped portion 15 may be arranged to extend in the vertical direction of the vehicle.

DESCRIPTION OF SYMBOLS 1 Seat back panel 10 Rear panel 10a Flat part 11 Retractor storage part 11a Upper part 11b Corner part 11c Mounting part 11d Through hole 13 Webbing passage surface 13a Upper side 13b Both sides 15 Protrusion shape part 15a Top 15b Root part 15c Inner side wall 15d Outer side wall 17 Joint 20 Front panel 21 Retractor projection 23 Concave portion 25 Hollow cross section 30 Retractor 30a Cover 30b Opening 31 Webbing belt

Claims (6)

In the structure of a seat back panel made of a resin material,
On one side of the seat back panel, a recessed retractor storage portion capable of storing a seat belt retractor is provided, and at an end of the seat back panel, a webbing belt extending from the retractor A webbing passage surface on which the abuts are abutted so as to be continuous with the end of the retractor storage section,
In the webbing passage surface, on both sides in the width direction of the webbing belt, there are provided projection shaped portions that project in the opposite direction to the recessed direction of the retractor storage portion, and the projection shaped portions A seat back panel structure extending towards the end of the seat back panel. The retractor storage is rectangular,
The seat back panel structure according to claim 1, wherein one longitudinal end of the projection shape portion is disposed at a corner of the retractor storage portion connected to the webbing passage surface.   The cross-sectional shape closer to the webbing belt among the cross-sectional shapes in the width direction of the webbing belt of the protrusion-shaped portion is provided to stand on the webbing passage surface. The seat back panel structure according to Item 2.   Of the cross-sectional shape of the protrusion shaped portion in the width direction of the webbing belt, the cross-sectional shape farther from the webbing belt is inclined in a direction away from the webbing passing surface as going from the top to the root of the protrusion shaped portion The seat back panel structure according to any one of claims 1 to 3, characterized in that: The seat back panel includes a plurality of panels including a first panel and a second panel, and the first panel and the second panel are joined in an overlapping manner.
The protrusion shaped portion is disposed on one surface of the first panel,
The junction part to which the said 2nd panel is joined is arrange | positioned on the back surface side of the part by which the said projection-shaped part is arrange | positioned, The claim is characterized by the above-mentioned. Seat back panel structure. The surface of the second panel on the side to be joined to the first panel is provided with a concave portion which is recessed in the direction away from the webbing passage surface of the first panel, and the end of the concave portion is Bonded to the joint of the first panel,
The first panel and the second panel constitute a hollow cross section in a state in which the concave portion of the second panel is superimposed on the back surface side of the webbing passage surface of the first panel. The seat back panel structure according to claim 5.

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