JP4832924B2 - Vehicle seat back - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat back for a vehicle, which is capable of simplifying a covering structure of a seat surface corresponding to a recessed shape in a seat back face side. <P>SOLUTION: A back board 40 is sewn with the end part 34A of a front-side seat surface 34 and covered with a back-side seat surface 42. The seat surface is covered with the front-side seat surface 34 and the back-side seat surface 42, and the end 40A of the back board 40 is clamped between a seat back frame 20 and a hem projection part 32C of a seat back pad 32. The intermediate part 40B of the back board 40 is formed with a step toward the hem projection part 32C to form a recess part 15B of the back face part 15 together with the back-side seat surface 42. <P>COPYRIGHT: (C)2007,JPO&amp;INPIT

Description

  The present invention relates to a vehicle seat back covered with a seat skin.

  Some vehicle seat backs have a concave back surface to widen the leg space for the rear seat occupant (see, for example, Patent Document 1). In such a seat back, a hanging bag is sewn on the seat skin on the back and back surface, and the wire inserted into the hanging bag is engaged with the seat frame to be pulled in, so that the seat skin is stretched.

However, in this conventional vehicle seat back, the structure for covering the seat skin is complicated.
JP-A-11-342279

  In view of the above fact, an object of the present invention is to provide a vehicle seat back capable of simplifying the covering structure of the seat skin corresponding to the concave shape on the back side of the seat.

A vehicle seat back according to a first aspect of the present invention covers a seat back frame, a seat back pad that covers the seat back frame, has a fringing projection on the back side of the seat, and covers the side of the seat from the front of the seat. And the front sheet skin covering the edging convex part and the terminal of the rear sheet skin that is provided on the front side of the sheet of the edging convex part and covers the terminal part of the front sheet skin and the back of the sheet at the left and right ends. parts are covered by the rear seat cover while being sewn, characterized in that said end portion has a, and Luba Kkubodo sandwiched between the seat back frame and the bordering protrusions.

According to the vehicle seat back of the present invention described in claim 1, when the seat surface is covered by the front seat skin and the rear seat skin, the edge of the backboard is used for bordering the seat back frame and the seat back pad. It is clamped between the convex parts. Thus, the front seat skin is Ru pulled to the side of the terminal portion in a state covering the sheets side from the sheet front surface. And unlike the conventional structure, since the rear sheet | seat skin does not need to be drawn in with a wire, it can be easily made into the finish state without a wrinkle.

A vehicle seat back according to a second aspect of the present invention is the vehicle seat back according to the first aspect, wherein a step is provided between the backboard and the fringing convex portion, and the rear seat. A recess is formed on the back of the sheet together with the skin.

According to the vehicle seat back according to the second aspect of the present invention, the knee-resting space for the occupant of the rear seat can be secured by forming the recess on the back surface of the seat together with the rear seat skin.

As described above, according to the vehicle seat back according to the first aspect of the present invention, the end portion of the backboard is sandwiched between the seatback frame and the edging convex portion, thereby enabling the lead-in wire. is not required, it has an excellent effect that it is possible to simplify the coating structure of a sheet over preparative epidermis.

According to the vehicle seat back according to claim 2, it has an excellent effect that the can provide a comfortable living space.

(First embodiment)
A vehicle seat back according to a first embodiment of the present invention will be described with reference to the drawings. In the figure, the arrow UP indicates the upward direction of the vehicle, and the arrow FR indicates the forward direction of the vehicle.

  FIG. 1 shows a perspective view of a vehicle seat 10 to which a vehicle seat back 14 of the present embodiment (hereinafter simply referred to as “seat back 14”) is applied. As shown in FIG. 1, a vehicle seat 10 includes a seat cushion 12 that supports the occupant's buttocks, and a seat back 14 that is tiltably supported by the rear end portion of the seat cushion 12 and supports the back of the occupant. The headrest 16 is provided so as to be vertically adjustable at the upper end of the seat back 14 and supports the head of the passenger.

  As shown in FIGS. 1 and 4, a concave portion 15 </ b> B surrounded by an edge portion 15 </ b> A is formed on the back surface portion 15 of the seat back 14 in order to widen the knee space of the rear seat occupant P (see FIG. 4). ing. As shown in FIG. 1, the edge portion 15A is formed at the upper edge portion of the back surface portion 15 and both side edge portions in the width direction (arrow 14W direction) in the present embodiment, and a step ( The difference in height is formed.

  As shown in FIGS. 2 and 3, the seat back 14 includes a seat back frame 20 that constitutes a skeleton part of the seat back 14. The seat back frame 20 is formed in a substantially inverted U shape as a whole, and is disposed in both side portions of the seat back 14 in the width direction (arrow 14W direction in FIG. 2), and is in the seat back height direction (arrow 14H direction in FIG. 3). ) And a pair of side portions 24 extending in the width direction of the seat back 14 (in the direction of the arrow 14W in FIG. 2) in the upper end of the seat back 14 and connected to the upper portions of the pair of side portions 24. And a top portion 22 (see FIG. 3).

  The top portion 22 shown in FIG. 3 is formed by bending a pipe material into a substantially U shape, and both ends are firmly attached to the side portion 24 by arc welding. The side portion 24 shown in FIG. 2 is formed by bending a plate material by press molding, and includes a frame side plate portion 26 having a general surface including a front-rear direction and a seat height direction, and a front end of the frame side plate portion 26. From the front side of the seat back (inner side of the seat back 14 in the width direction (arrow 14W direction)) and the rear side of the rear side of the frame side plate part 26 extending from the rear side of the seat back And a flange portion 30. Accordingly, the horizontal cross-sectional shape of the pair of left and right side portions 24 is a substantially U-shaped open cross-sectional shape. The rear flange portion 30 extends greatly compared to the front flange portion 28.

  As shown in FIGS. 2 and 3, the seat back frame 20 is covered with an elastically deformable seat back pad 32. The seat back pad 32 is formed by foaming urethane. In the present embodiment, the seat back pad 32 formed separately from the seat back frame 20 is assembled to the seat back frame 20. (Hereinafter, the unit in which the seat back pad 32 is assembled to the seat back frame 20 is referred to as the seat back body 25.) The seat back pad 32 supports the back of the occupant sitting on the seat cushion 12 (see FIG. 1). Portion 32A, as shown in FIG. 2, side support portions 32B that are integrally provided on both sides of the backrest portion 32A and support the occupant side portions, and edge protrusions provided on the upper and side portions of the seat back side. 32C.

  The seat back pad 32 is covered with a front seat skin 34. The front seat skin 34 is configured by stitching several seat skins together at the stitching portion 36, and from the seat front surface (the surface on the arrow FR direction side) to the seat side surface (the outer surface in the arrow 14W direction), that is, the backrest. While covering the part 32A and the side support part 32B, the covering convex part 32C on the sheet back side is also covered. A terminal portion 34A (portion close to the terminal) of the front seat skin 34 is sewn to a thin plate-like backboard 40 at a sewing portion 38.

  The backboard 40 is made of a soft and flexible synthetic resin plate and is disposed on the back side of the seatback 14. In the present embodiment, the backboard 40 is a soft and flexible board, but a hard board may be used. The backboard 40 is covered with a rear seat skin 42 that covers most of the back surface of the seat. The rear seat skin 42 is sewn to the backboard 40 while being sandwiched between the front seat skin 34 and the backboard 40 at a sewing portion 38 between the front seat skin 34 and the backboard 40. By this sewing, the front seat skin 34 and the rear seat skin 42 are integrated with the back board 40, and in the integrated state, they are formed into a bag shape as a whole.

  The end portions 40A on the left and right sides of the backboard 40 are sandwiched between the rear flange portion 30 in the side portion 24 of the seat back frame 20 and the fringing convex portion 32C. As a result, the intermediate portion 40B in the width direction of the backboard 40 (the same direction as the arrow 14W direction), together with the rear seat skin 42, forms a recess 15B in the back portion 15 that is the seat back. As shown in FIGS. 2 and 3, in the present embodiment, the backboard 40 is disposed so that the board surface is not a curved surface but a flat surface.

  Next, the covering procedure (attachment procedure) of the seat skin (the front seat skin 34 and the rear seat skin 42) in the seat back 14 and the operation of this embodiment will be described.

  First, the operator puts the front seat skin 34 and the rear seat skin 42, which are integrated with the back board 40 in advance, into the seat back body 25 from above in the seat back height direction (the direction of arrow 14H in FIG. 3). Cover.

  Next, the operator inserts the end portions 40A on both the left and right sides of the backboard 40 shown in FIG. 2 between the rear flange portion 30 in the side portion 24 of the seat back frame 20 and the fringing convex portion 32C. (Insert) and hold. As a result, the front seat skin 34 is pulled toward the terminal portion 34 </ b> A while covering the seat side surface from the seat front surface. In addition, as shown in FIG. 3, the worker arranges the upper end portion 40 </ b> C of the backboard 40 between the rim projections 32 </ b> C in the upper portion and the seat back frame 20. As a result, the intermediate portion 40B of the backboard 40 forms a recess 15B of the back surface portion 15 together with the rear seat skin 42 by forming a step between the rimming convex portion 32C.

  Finally, the operator locks the lower end portion (not shown) of the front seat skin 34 at a predetermined position of the seat back body 25 and finishes the attachment work.

  As described above, the end 40A of the backboard 40 shown in FIG. 2 is sandwiched between the seat back frame 20 and the rim projection 32C, so that a pull-in wire (pull-in structure) or a resin hook (hanging or the like) is obtained. Therefore, the covering structure of the seat cover corresponding to the concave shape on the back side of the seat can be simplified, and as a result, the cost can be reduced.

  Further, unlike the conventional structure, the rear seat skin 42 does not need to be pulled in with a wire, and the conventional work using a hanging bag, an insert wire, a hog ring, a resin hook, etc. can be omitted, so that the seat assembly workability Can be improved. In addition, it is possible to achieve a firm finish (with no wrinkles) with easy work, and high quality can be achieved.

  Thus, by forming the recessed part 15B of the back surface part 15, as shown in FIG. 4, the knee rest space B in the passenger | crew P of a back seat | sheet can be ensured. In particular, even a vehicle having a short couple distance A such as a small car or a three-row seat minivan has an advantage that a comfortable living space can be provided by forming the recess 15B.

(Second Embodiment)
Next, a second embodiment of the vehicle seat back will be described with reference to FIGS. In addition, about the structure similar to 1st Embodiment, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As shown in FIGS. 5 and 9, in order to widen the knee space of the rear seat occupant P (see FIG. 9), the seat back 14 has an intermediate portion in the seat back height direction (arrow 14 H direction) in front of the vehicle ( It is curved so as to be convex toward the arrow FR direction), and the back surface portion 15 is formed in a concave shape when viewed from the side of the seat.

  As shown in FIG. 10, the seat back 14 includes a seat back frame 20, a seat back pad 32, a seat skin 44, and a flexible board 50.

  As shown in FIG. 8, the seat back frame 20 is curved so that an intermediate portion in the seat back height direction (arrow 14H direction) is convex toward the front of the vehicle (arrow FR direction). Thus, the side portion 24 is formed in a concave shape so that the back side of the side portion 24 warps toward the vehicle rear side. Further, as shown in FIG. 10, a spring material 23 is installed on the pair of side portions 24. Note that the side airbag device 21 is attached to one side portion 24 outside the seat back width direction (arrow 14W direction).

  The seat back pad 32 assembled to the seat back frame 20 is formed in a concave shape that is curved substantially corresponding to the seat back frame 20. In the seat back pad 32, a groove portion 33 into which a stitched portion 36 (see FIG. 7) of the front seat skin 34 is inserted is along the seat back height direction (arrow 14H direction) and the seat back width direction (arrow 14W direction). Is formed. As shown in FIG. 7, the upper and lower parts of the seat back pad 32 are folded back and arranged on the back side. As shown in FIG. It is folded and placed on the back side.

  The seat skin 44 covers the seat back pad 32 to cover the seat side surface (the outer surface in the direction of arrow 14W) from the front surface of the seat (the surface on the arrow FR direction side), and the rear surface disposed on the rear side. A sheet skin 46. As shown in FIG. 7, the lower end portion 34 </ b> B of the front seat skin 34 is locked to a locking tool 52 at the lower back side of the seat back body 25.

  The back seat skin 46 includes a bag-like portion 48 that is attached to the front seat skin 34 and is provided on the seat rear side with respect to the seat back frame 20 and the seat back pad 32. By being sewn on the seat skin 34, it is formed in a bag shape having an opening at the bottom. That is, the upper part of the bag-like part 48 is a sewing part 54, and is sewn in advance to the upper folded end part 34 </ b> C in the front sheet skin 34. This sewing portion 54 forms the bag bottom of the bag-like portion 48. Further, as shown in FIG. 6, both side portions of the bag-like portion 48 are also sewn portions 56, which are sewn and closed in advance on the terminal portion 34 </ b> A of the front seat skin 34. The external appearance of the bag-like portion 48 in the sewing state is as shown in FIG. 5, and is sewn continuously in a substantially inverted U shape in the external appearance. As described above, the bag-like portion 48 in the back sheet skin 46 is formed by closing the portions sewn by the sewing portions 54 and 56. As shown in FIG. 7, the lower end portion 48 </ b> A on the front side of the seat in the bag-like portion 48 is locked to the locking tool 52.

  The lower part of the rear seat cover 46 on the rear side of the seat is stitched together by a stitching portion 58, and a hook 60 is attached to the tip of the stitch. The hook 60 is locked to a wire 62 in the seat cushion 12.

  A flexible board 50 is inserted into the bag-like portion 48. A soft and flexible synthetic resin plate is applied to the flexible board 50. As shown in FIG. 8, the flexible board 50 is bent in a concave shape along the seat back frame 20, and as shown in FIG. Accordingly, as shown in FIG. 5, a smooth and continuous curved surface is formed on the back surface portion 15 of the seat back 14.

  Next, the covering procedure (attachment procedure) of the seat skin (the front seat skin 34 and the back seat skin 46) in the seat back 14 and the operation of this embodiment will be described.

  First, as shown in FIG. 11, the operator places the front seat cover 34 and the back seat cover 46 (in a form so as to cover socks) from the upper side in the seat back height direction (arrow 14H direction) from above. Put on. In the middle of this operation, the hog ring 64 (locking member) for retracting the front seat skin 34 and the buff 66 (tension transmission member) for the side airbag device 21 are fixed. Since the front seat skin 34 and the rear seat skin 46 are not integrated with the flexible board 50, these fixing operations can be facilitated.

  Next, as shown in FIG. 12, the worker puts the front seat skin 34 and the back seat skin 46 on the seat back main body 25 and covers the lower end portion 34 </ b> B of the front seat skin 34 and the back seat skin 46. The lower end portion 48 </ b> A on the front side of the seat in the bag-like portion 48 is locked to the locking tool 52 at the lower back side of the seat back body 25. As a result, the seat back body 25 is in a state of being wrapped by the front seat skin 34 and the rear seat skin 46, and the bag-like portion 48 is disposed on the seat rear side with respect to the seat back frame 20 and the seat back pad 32. .

  In this state, the operator inserts the flexible board 50 into the bag-like portion 48 from below, and bends the flexible board 50 into a concave shape along the seat back frame 20 as shown in FIG. . Thereby, as shown in FIG. 7, the bag-like portion 48 is in a state along the flexible board 50. Lastly, the operator engages the hook 60 at the front end portion of the rear seat skin 46 with the wire 62 in the seat cushion 12 and finishes the mounting operation.

  Due to the locking to the wire 62, the back sheet skin 46 is in a tensioned state. Here, in the conventional suspension structure, when the sheet skin is stretched, the sheet is short-circuited as it is and a curved surface cannot be formed. However, in the present embodiment, the bag-like portion 48 is placed along the flexible board 50. Therefore, the back sheet skin 46 is not short-circuited, that is, is not flat as shown by the imaginary line X in FIG. A curved surface can be formed. In addition, since the back surface portion 15 has no step, it is possible to form a clean design.

  Furthermore, since the flexible board 50 is inserted after the sheet surface is once covered by the front sheet skin 34 and the back sheet skin 46, the covering operation by the front sheet skin 34 and the back sheet skin 46 is easy, and as a result, The assembling workability of the seat can be improved.

(Other forms)
In the first embodiment, the rimming convex portion 32C is provided on the upper portion and the side portion on the seat back side, but the rimming convex portion is, for example, the upper portion, the lower portion, and the side on the seat rear side. Other edging convex portions as provided in the portion may be used.

  In the first embodiment, the backboard 40 is arranged so as to have a flat shape. However, the backboard has a concave shape, for example, like the flexible board 50 of the second embodiment. You may arrange | position so that it may be bent and it may become a curved surface shape.

  Furthermore, in the second embodiment, the back sheet skin 46 is sewn to the front sheet skin 34 to form the bag-shaped portion 48. For example, the bag-shaped portion previously formed in a bag shape is the front side. It is good also as a structure attached separately to a sheet | seat skin.

  Furthermore, in the second embodiment, the flexible board 50 is inserted from below into the bag-like portion 48 that is open at the bottom. The flexible board is, for example, a bag-like shape that is open at the top. It may be inserted into the bag-like part from another direction, such as being inserted into the part from above.

It is a perspective view showing a vehicular seat to which a vehicular seat back concerning a 1st embodiment of the present invention is applied. FIG. 2 is a cross-sectional view corresponding to a cross section taken along line 2-2 of FIG. (The left half is not shown.) FIG. 3 is a cross-sectional view corresponding to a cross section taken along line 3-3 in FIG. 1. It is a side view showing a vehicular seat to which a vehicular seat back concerning a 1st embodiment of the present invention is applied. It is a perspective view showing a vehicular seat to which a vehicular seat back concerning a 2nd embodiment of the present invention is applied. FIG. 6 is a cross-sectional view corresponding to a cross section taken along line 6-6 of FIG. (The left half is not shown.) FIG. 7 is a cross-sectional view corresponding to a cross section along line 7-7 in FIG. 5. It is sectional drawing which shows the state in which the flexible board in the 2nd Embodiment of this invention bent along the seat back frame. (It is sectional drawing equivalent to the 8-8 line cross section of FIG. 5.) It is a side view showing a vehicular seat to which a vehicular seat back concerning a 2nd embodiment of the present invention is applied. It is a disassembled perspective view of the vehicle seat back which concerns on the 2nd Embodiment of this invention. It is a perspective view which shows the middle state which covers the seat back main body of the seat skin of the vehicle seat back which concerns on the 2nd Embodiment of this invention. It is sectional drawing which shows the state which inserts the flexible board in the 2nd Embodiment of this invention in the bag-shaped part of a back sheet | seat outer skin.

Explanation of symbols

14 Seat back (vehicle seat back)
15B Concave portion 20 Seat back frame 32 Seat back pad 32C Border convex portion 34 Front seat skin 34A Terminal portion 40 Back board 40A End portion 40B Intermediate portion 42 Rear seat skin 46 Back seat skin 48 Bag-like portion 50 Flexible board

Claims (2)

A seat back frame;
A seat back pad that covers the seat back frame and has a fringing projection on the back side of the seat;
A front sheet skin that covers the sheet side surface from the front surface of the sheet and covers the edging convex part,
Provided on the front side of the sheet of the convex part for fringing, the end part of the front sheet skin and the terminal part of the rear sheet skin covering the back of the sheet are sewn at the left and right ends, and covered with the rear sheet skin is a Luba Kkubodo is sandwiched between the end the seat back frame and the bordering protrusions,
A vehicle seat back, comprising: The vehicle seat back according to claim 1, wherein a step is provided between the backboard and the fringing convex portion, and a concave portion is formed on the back surface of the seat together with the rear seat skin .

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