JP2018100040A - Vehicle seat - Google Patents

Abstract

A vehicle seat that prevents or suppresses the formation of a gap between a cover member attached to a shoulder portion of a seat back and an outer skin while suppressing an increase in the number of parts. In a seat back 14, a fixing portion 52 having a locally thinned thickness is formed in a recess 50 in which an insertion port 54 for a seat belt 19 of a seat back pad 22 is formed. A fixed portion 52 is supported from below by a support base 32 attached to the upper frame 30. Therefore, even when a downward load is applied to the seat back pad 22 when the skin 24 is put on the seat back pad 22, an upward reaction force is applied via the fixing portion 52 fixed to the support base 32. The seat back pad 22 is prevented or suppressed from being deformed downward around the recess 50. Moreover, since the fixing | fixed part 52 was only formed in the recessed part 50, the increase in a number of parts can be suppressed. [Selection] Figure 4

Description

  The present invention relates to a vehicle seat.

  In recent years, the use of vehicle seats (hereinafter referred to as “belt-in seats”) with a structure in which a seat belt retractor is built in the seat back and the seat belt is pulled in from the shoulder portion of the seat back is increasing in automobiles. Have been doing. In the seat back of the belt-in seat, an opening is formed in the shoulder portion of the urethane pad in order to draw the seat belt to the retractor. A cover member having a belt insertion opening is attached to the upper portion of the opening, and a belt guide for guiding the seat belt toward the retractor is disposed inside.

  When this cover member is placed around the opening of the urethane pad, when the urethane pad is recessed by a load from the occupant, it is between the cover member (lower edge) and the urethane pad (skin). There was a risk of creating a gap.

  As a countermeasure against this, Patent Document 1 discloses that an outer skin is sandwiched between a cover support member and a cover member fixed to a stay attached to a seat back frame (backrest frame), thereby deforming the urethane pad. A structure for preventing wrinkles and forming a gap between the cover member and the skin has been proposed.

JP 2009-26724 A

  In the case of the structure of Patent Document 1, it is necessary to newly add a cover support member and to attach the cover support member to the stay of the seat back frame, which increases the number of parts and the number of assembly steps.

  In consideration of the above fact, the present invention provides a vehicle seat that prevents or suppresses the formation of a gap between a cover member attached to a shoulder portion of a seat back and an outer skin while suppressing an increase in the number of parts. The purpose is to obtain.

  A vehicle seat according to a first aspect of the present invention is a cushion material disposed inside a seat back, and the seat is inserted into a peripheral portion of a seat belt insertion opening formed in a shoulder portion of the cushion material. The seat back pad is formed with a fixing portion in which the thickness of the cushion material is locally thinned, and the seat back pad is covered with the seat back pad from above the seat back pad, and the surface of the seat back is formed. A skin formed with an opening corresponding to the insertion port, a support fixed to the seat back frame and supporting the fixing unit from below the seat, and disposed on the seat back pad so as to cover the insertion port. And a cover member that clamps the opening side end portion of the skin with the seat back pad by being fastened to the support base.

In this vehicle seat, an insertion port for inserting a seat belt is formed in a shoulder portion of a seat back pad that is a cushion material for the seat back. In addition, a fixing portion in which the thickness of the seat back pad (cushion material) is locally thinned is formed at the peripheral portion of the insertion opening.
If the skin is covered from above the seat back pad during manufacture of the seat back, a downward load acts on the seat back pad (the shoulder). On the other hand, the fixing portion of the seat back pad is supported from below by a support base fixed to the seat back frame. Therefore, an upward reaction force is input from the support base to the seat back pad, and the downward deformation of the seat back pad is prevented or suppressed. In particular, deformation of the seat back pad at the peripheral edge of the insertion opening that is likely to be deformed when a downward load is input to the seat back pad is prevented or suppressed. As a result, the formation of a gap between the cover member fastened to the support base and the skin is prevented or suppressed.

  In addition, this vehicle seat has only a part of the seat back pad (fixed part) added, and the fixed part is supported from below by a conventional support stand, thereby suppressing an increase in the number of parts and assembly man-hours. it can.

  Here, “fixed to the seat back frame” includes not only the case of being directly fixed to the seat back frame but also the case of being indirectly fixed to the seat back frame with a member interposed therebetween.

  A vehicle seat according to a second aspect of the present invention is the vehicle seat according to the first aspect, wherein the insertion port is formed on the seat rear side of the fixing portion.

  In this vehicle seat, the insertion opening is formed on the seat rear side of the fixed portion. When the skin is covered from the upper part of the seat back pad when the seat back is assembled, the seat front side end of the peripheral edge portion of the insertion opening is deformed the most in the seat back pad (depresses downward). However, since the fixing portion is formed on the front side of the insertion port of the seat back pad, and the fixing portion is supported from below by the support base fixed to the seat back frame, the peripheral portion of the insertion port in the seat back pad The deformation of the end portion on the front side of the seat is suppressed. As a result, the deformation of the peripheral edge portion of the insertion opening of the seat back pad is prevented or suppressed, and the formation of a gap between the skin and the cover member is further prevented or suppressed.

  A vehicle seat according to a third aspect of the present invention is the vehicle seat according to the first or second aspect, wherein the vehicle seat is arranged on a seat upper portion of the fixing portion and fastened to the support base, and is seated at the insertion opening. A belt guide for guiding the belt is provided, and the belt guide and the fixing portion are fastened together with the support base.

  In this vehicle seat, the belt guide is disposed on the upper portion of the fixed portion, and the belt guide and the fixed portion are fastened together with the support base, so that an increase in the number of parts is suppressed.

  As described above, the vehicle seat according to the present invention prevents or suppresses the formation of a gap between the cover member attached to the shoulder portion of the seat back and the skin while suppressing an increase in the number of parts. can do.

It is a side view showing a schematic structure of a vehicular seat concerning one embodiment of the present invention. It is a disassembled perspective view which shows the principal part of the seat back which concerns on one Embodiment of this invention. It is a partially cutaway perspective view showing a main part of a seat back according to an embodiment of the present invention. It is a longitudinal section showing the important section of a seat back concerning one embodiment of the present invention. It is a top view which shows the fixing | fixed part of the pack pad which concerns on one Embodiment of this invention.

  A vehicle seat 10 according to an embodiment of the present invention will be described with reference to FIGS. In addition, each figure is typical and the illustration with a low relevance to the present invention is omitted. 2 and 3, the skin 24 is omitted. 1 to 5, the arrow FR indicates the front of the vehicle, the arrow OUT indicates the vehicle width direction outside, and the arrow UP indicates the vehicle upper direction. In the present embodiment, the front of the seat, the seat width direction, and the upper portion of the seat substantially coincide with the front of the vehicle, the vehicle width direction, and the upper portion of the vehicle, respectively. To do.

(Constitution)
As shown in FIG. 1, the vehicle seat 10 for an automobile according to the present embodiment is provided on the driver seat side on the right side of the front seat of the vehicle in the cabin.

  As shown in FIG. 1, the vehicle seat 10 includes a seat cushion 12 on which an occupant P is seated, a seat back 14 that supports the back of the occupant P at the rear end of the seat cushion 12, and an upper end of the seat back 14. And a headrest 16 that is disposed and supports the head of the occupant P.

  As shown in FIGS. 2 to 4, the seat back 14 has a seat back frame 18 disposed therein, a retractor 20 for a seat belt 19 attached to the seat back frame 18, and a seat so as to be covered from above. The seat back pad 22, which is a cushion material formed with urethane or the like attached to the back frame 18, and a skin 24 that covers the surface of the seat back pad 22 are configured.

  As shown in FIG. 2, the seat back frame 18 has a pair of side frames 28 (only one is shown in FIG. 2) extending in the vehicle vertical direction at both ends in the vehicle width direction of the seat back 14 and a pair of upper ends of the side frames 28. And an upper frame 30 extending between the side frames 28 (in the vehicle width direction).

  As shown in FIG. 2, a support base 32 is attached to the outer end of the upper frame 30 in the vehicle width direction. The support base 32 includes a flat plate-shaped mounting base 34 and a pair of side plates 36, 36 extending downward from the both ends of the mounting base 34 in the vehicle width direction. An arcuate recess 38 (see FIG. 3) is formed along the outer peripheral surface of the.

  A pair of insertion holes 40 and 40 (see FIG. 4) for bolts 44 described later are formed on the vehicle front side of the mounting base 34. A pair of insertion holes 43, 43 for upper frame fastening bolts (not shown) are formed on the vehicle rear side of the mounting base 34. The support base 32 is fixed to the upper frame 30 by inserting upper frame fastening bolts (not shown) through the insertion holes 43 and 43 and fastening them to the upper frame 30.

  As shown in FIG. 4, the bolt 44 includes a cylindrical column part 45, a screw part 46 that has a diameter smaller than that of the column part 45 and extends upward in the axial direction from the column part 45, and a lower end of the column part 45. And a flange portion 48 projecting outward in the radial direction. The bolt 44 is inserted (inserted) into the insertion hole 40 of the mounting base 34 from below and joined (welded) in a state where the flange portion 48 is in contact with the mounting base 34, and is fixed to the mounting base 34.

  The retractor 20 is fixed to the seat back frame 18 via a bracket (not shown).

  As shown in FIGS. 2 to 4, the seat back pad 22 attached to the front side and the upper side of the seat back frame 18 is a recess in which a belt guide 60 described later is accommodated on the outer side in the vehicle width direction of the shoulder portion 22 </ b> A. 50 is formed. A plate-like fixing portion 52 that is locally thin in the seat back pad 22 is formed at the bottom of the recess 50.

  Further, at the bottom of the recess 50, an insertion port 54 for seat belt insertion is formed on the vehicle rear side of the fixed portion 52, as shown in FIGS. Further, the fixing portion 52 has a pair of insertion holes 56 and 56 through which the cylindrical portion 45 of the pair of bolts 44 is inserted, and a receiving hole for a tapping screw 76 described later between the insertion holes 56 and 56. 58 is formed.

  Furthermore, as shown in FIGS. 2 to 4, a belt guide 60 is disposed in the upper portion of the fixed portion 52 in the recess 50. The belt guide 60 is a substantially rectangular plate 62 having the same shape as the fixed portion 52, and a substantially rectangular shape that is rotatable about a rotation axis that extends in the vehicle width direction at the vehicle rear side end of the plate 62. Ring member 64.

  The plate body 62 is formed with a pair of insertion holes 66 and 66 through which the respective screw portions 46 of the pair of bolts 44 and 44 are inserted. Further, a hole 68 for a tapping screw 76 described later is formed between the insertion holes 66 of the plate body 62.

  Therefore, as shown in FIG. 4, the fixing portion 52 of the seat back pad 22 and the plate body 62 of the belt guide 60 are stacked on the support base 32, and the bolt 44 joined from below to the insertion hole 40 of the support base 32. The screw part 46 protrudes upward from the plate body 62 through the insertion hole 56 of the fixing part 52 and the insertion hole 66 of the plate body 62, and the nut 70 is fastened to the protruding screw part 46, so The fixing portion 52 and the belt guide 60 are fixed to each other.

  As a result, the ring member 64 of the belt guide 60 is positioned above the insertion opening 54 of the seat back pad 22, and the seat belt 19 inserted into the seat back 14 from the opening 80 of the cover member 72 described later is seated back. It guides to the insertion port 54 of the pad 22.

  Further, as shown in FIGS. 2 and 4, a cover member 72 is attached above the belt guide 60 in the recess 50. The cover member 72 has a substantially box shape with an open lower surface, and a lower end 72 </ b> A is installed on the stepped portion 74 in the recess 50.

  As shown in FIG. 2, an insertion hole 78 for a tapping screw 76 is formed on the upper surface of the cover member 72 on the front side of the vehicle. Therefore, the cover member 72 is fixed to the belt guide 60 when the tapping screw 76 is screwed into the hole 68 of the belt guide 60 from the insertion hole 78 of the cover member 72. At this time, the tip of the tapping screw 76 protruding downward from the hole 68 of the belt guide 60 is configured to be received in the receiving hole 58 of the fixing portion 52.

  In addition, an opening 80 for inserting the seat belt 19 is formed substantially at the center of the upper surface of the cover member 72 in the vehicle longitudinal direction.

  Therefore, as shown in FIG. 4, the seat belt 19 passes through the insertion port 54 of the seat back pad 22 and the ring member 64 of the belt guide 60 from the retractor 20 along the guide plate 82 through the rear side of the upper frame 30. And is led out from the opening 80 of the cover member 72 to the outside.

  As shown in FIG. 4, the skin 24 is placed on the seat back pad 22, and an opening 84 corresponding to the concave portion 50 of the seat back pad 22 is formed. The skin 24 is fixed by sandwiching an opening-side end 86 constituting the opening 84 between the stepped portion 74 of the recess 50 and the lower end 72 </ b> A of the cover member 72.

(Manufacture of seat back 14)
The manufacture (assembly) of the seat back 14 of the vehicle seat 10 formed in this way will be described. First, the seat back pad 22 is put on the seat back frame 18 to which the retractor 20 and the support base 32 are attached from above. At this time, the fixing portion 52 of the seat back pad 22 is disposed on the mounting base 34 of the support base 32. Here, the bolt 44 joined to the insertion hole 40 of the mounting base 34 is inserted into the insertion hole 56 of the fixing portion 52 from below. The cylindrical portion 45 of the bolt 44 is inserted into the insertion hole 56.

  Accordingly, the fixing portion 52 (seat back pad 22) is positioned with respect to the support base 32 fixed to the seat back frame 18.

  Subsequently, as shown in FIGS. 2 to 4, the belt guide 60 is disposed on the fixing portion 52 in the concave portion 50 of the seat back pad 22. At this time, the screw portion 46 of the bolt 44 protruding upward from the insertion hole 56 of the fixing portion 52 is inserted into the insertion hole 66 of the belt guide 60, and the screw portion 46 protruding upward from the plate body 62 is fastened by the nut 70. Is done. As a result, the fixing portion 52 and the belt guide 60 are stacked on the support base 32 and positioned and fixed with respect to the support base 32.

  Further, the skin 24 is covered from above the seat back pad 22 and pulled downward, thereby being brought into close contact with the surface of the seat back pad 22.

  Finally, the cover member 72 is placed on the stepped portion 74 of the recess 50 of the seat back pad 22, and the tapping screw 76 is inserted into the insertion hole 78 from above. The tapping screw 76 is screwed into the hole 68 of the belt guide 60 as shown in FIG. As a result, the cover member 72 is fixed to the belt guide 60 as shown in FIG. As a result, the opening-side end 86 of the skin 24 is sandwiched between the lower end 72 </ b> A of the cover member 72 and the stepped portion 74 of the recess 50 of the seat back pad 22.

  Thus, the seat back 14 of the vehicle seat 10 is formed.

(effect)
Next, the effect of the vehicle seat 10 will be described.
As shown in FIG. 4, when the seatback 14 is manufactured, when the seatback 24 is put on the seatback pad 22 from above, the seatback is pulled from the skin 24 pulled with a tension T (see arrow T in FIG. 4). A downward load acts on the pad 22 (the shoulder portion 22A thereof), and the seat back pad 22 at the peripheral portion of the recess 50, particularly the insertion opening 54, may be deformed downward.

  However, in the vehicle seat 10, a substantially flat fixing portion 52 is formed inside the recess 50 and is supported from below by the support base 32 fixed to the upper frame 30 of the seat back frame 18. An upward reaction force acts on the seat back pad 22 from the support base 32 via the fixing portion 52, and the seat back pad 22 around the recess 50 is prevented or suppressed from being deformed downward.

  As a result, when the cover 24 is put on the seat back pad 22, the seat back pad 22 around the recess 50 is deformed downward by the attachment of the cover 24, and the cover member 72 and the cover 24 (seat back pad 22). It is possible to prevent or suppress the formation of a gap between them and the wrinkling of the epidermis 24.

  In particular, since the fixing portion 52 is formed on the front side of the insertion port 54 where the seat back pad 22 is most easily deformed by a downward load acting when the skin 24 is attached, the front side of the peripheral portion of the insertion port 54 of the seat back pad 22 The upward reaction force is efficiently transmitted to the front edge portion 55 (see FIG. 5, the front edge portion 55), and the deformation of the front edge portion 55 is further prevented or suppressed.

  Further, in the vehicle seat 10, the fixing portion 52 is added to the existing seat back pad 22, and the fixing portion 52 is supported (fixed) from below by the support base 32 for attaching the belt guide 60 fixed to the upper frame 30. Just good. That is, without using a new part, an upward reaction force against a downward load input due to the attachment of the skin 24 to the seat back pad 22 is ensured, and the deformation (formation of a dent) of the seat back pad 22 around the recess 50 is ensured. Prevented or suppressed. That is, the deformation of the seat back pad 22 is prevented or suppressed without increasing the number of parts and the number of assembly steps, and a gap is formed between the lower end 72A of the cover member 72 and the opening side end 86 of the skin 24. It is possible to prevent or suppress wrinkles on the epidermis 24.

  Further, since the insertion hole 56 for the bolt 44 is formed in the fixing portion 52, the fixing portion 52 is positioned on the support base 32 only by fastening with the bolt 44 when fixing the fixing portion 52 to the support base 32. Is done. That is, the seat back pad 22 can be positioned with respect to the seat back frame 18 (support base 32).

  Further, since the fixing portion 52 of the seat back pad 22 and the belt guide 60 are fastened to the support base 32 with the bolts 44, the fixing portion 52 and the belt guide 60 can be fixed (fastened together) with one bolt 44. it can. As a result, the number of parts can be reduced.

  Even when the seat back 14 is not manufactured, the same effect can be obtained when a downward load is applied to the shoulder portion 22A of the seat back pad 22.

DESCRIPTION OF SYMBOLS 10 Vehicle seat 14 Seat back 18 Seat back frame 19 Seat belt 22 Seat back pad 24 Skin 30 Upper frame 32 Support base 52 Fixing part 54 Insertion port 60 Belt guide 72 Cover member 86 Opening side edge part

Claims (3)

A cushioning material disposed inside the seat back, and a fixed part in which the thickness of the cushioning material is locally reduced at the periphery of a seat belt insertion opening formed on the shoulder of the cushioning material A seat back pad formed with,
The surface of the seat back is configured by covering the seat back pad from above the seat back pad, and the skin in which an opening corresponding to the insertion port is formed,
A support base fixed to the seat back frame and supporting the fixed portion from below the seat;
A cover member that is disposed on the seat back pad so as to cover the insertion opening, and is clamped to the support base so as to sandwich the opening side end of the epidermis with the seat back pad;
A vehicle seat comprising:   The vehicle seat according to claim 1, wherein the insertion port is formed on a seat rear side of the fixing portion. A belt guide disposed on the seat of the fixed portion and fastened to the support, and guiding the seat belt to the insertion port;
The vehicle seat according to claim 1, wherein the belt guide and the fixing portion are fastened together with the support base.