JP2024125097A - Seat back - Google Patents

Abstract

[Problem] To obtain a seat back that can be assembled and disassembled with ease. [Solution] A seat back 14 has a front extending piece 20B that extends from a front skin part 20A covering the front surface of a seat back pad 16, via the seat lower side of the seat back pad 16, to the rear surface side of the seat back pad 16, and has a long hole 26 extending in the seat width direction at an end 20B, a rear extending piece 22B that extends from a rear skin part 22A covering the rear surface of the seat back pad 16 to the seat lower side, and a part of the rear extending piece 22B passes inside the long hole 26 and is engaged with the long hole 26, a first hook and loop fastener 30 provided at an end 22B1 of the rear extending piece 22B, and a second hook and loop fastener 32 provided on a part of the rear extending piece 22B on the rear skin part 22A side, and joined to the first hook and loop fastener 30. [Selected Figure] Figure 2

Description

The present invention relates to a seat back.

The following Patent Document 1 discloses an invention relating to a vehicle seat. In this vehicle seat, a hanging surface material is connected to an inside cover piece that covers the inside portion of the side pad in the seat width direction, and a retractor is provided at the tip of this hanging surface material. Meanwhile, a sheet-like body made of carpet material is sewn to an outside cover piece that covers the outside portion of the side pad in the seat width direction, and this sheet-like body is provided with a strip with a hook surface of a hook-and-loop fastener.

Then, at the rear side of the seat of the side pad, a strip is wrapped around the edge of the retractor, and the hook-and-loop fastener of the strip is engaged with the planar body, thereby fixing the inside cover piece and the outside cover piece to the side pad. This simplifies the fixing of the inside cover piece and the outside cover piece.

JP 2018-001988 A

However, in the prior art described in Patent Document 1, the connection points between the inside cover piece and the outside cover piece are hidden by the cover preventing the inside from being seen and the back cover piece. For this reason, when dismantling the seat back, it is necessary to remove at least one of the cover preventing the inside from being seen and the back cover piece, which is thought to make the dismantling work complicated.

Taking the above facts into consideration, the present invention aims to provide a seat back that can simplify assembly and disassembly work.

The seat back according to the present invention described in claim 1 has a first extending piece extending from a front skin covering the front surface of a seat back pad capable of supporting the back of an occupant via the seat underside of the seat back pad to the rear side of the seat back pad and having a long hole extending in the seat width direction at its end, a second extending piece extending from a rear skin covering the rear surface of the seat back pad to the seat underside and engaging with the long hole by passing a part of the long hole inside, a first hook-and-loop fastener provided at the end of the second extending piece, and a second hook-and-loop fastener provided on at least one of the rear skin and the part of the second extending piece on the rear skin side and joined to the first hook-and-loop fastener.

According to the present invention described in claim 1, the front surface of the seat back pad capable of supporting the back of the occupant is covered with a front skin portion, and a first extension piece portion extends from the front skin portion to the rear surface side of the seat back pad via the seat lower side of the seat back pad. The first extension piece portion is provided with a long hole portion extending in the seat width direction at its end side.

On the other hand, a second extension extends downward from the rear skin portion that covers the rear surface of the seatback pad, and this second extension passes through the inside of the long hole portion and is engaged with this long hole portion.

In addition, in the present invention, a first hook-and-loop fastener is provided on the end side of the second extending piece, and a second hook-and-loop fastener is provided on at least one of the rear skin part and the portion of the second extending piece on the rear skin part side.

Therefore, in the present invention, by pulling the second extension piece through the long hole toward the upper side of the seat, the periphery of the long hole in the first extension piece moves toward the upper side of the seat according to the amount of pulling of the second extension piece. As a result, tension is generated in the portion of the front skin part on the lower side of the seat and the portion of the rear skin part on the lower side of the seat, which come into close contact with the seatback pad. Then, in this state, by joining the first hook-and-loop fastener to the second hook-and-loop fastener, the front skin part and the rear skin part are maintained in close contact with the seatback pad. In other words, in the present invention, the portion of the front skin part on the lower side of the seat and the portion of the rear skin part on the lower side of the seat can be fixed to the seatback pad by working only on the surface side of the seatback.

On the other hand, when dismantling the seat back, the first hook-and-loop fastener is released from the connection with the second hook-and-loop fastener, and the second extension piece is pulled out of the long hole, thereby releasing the fixed state between the seat lower part of the front skin part and the seat lower part of the rear skin part and the seat back pad.

The seat back according to the present invention described in claim 2 is the invention described in claim 1, in which the rear skin portion is provided with a hidden piece portion that covers the second extension piece portion and the long hole portion when viewed from the rear side of the seat.

According to the present invention described in claim 2, a hidden piece is provided on the rear skin portion, and this hidden piece covers the long hole portion provided on the second extension piece and the first extension piece when viewed from the rear side of the seat. Therefore, in this invention, the connection point between the first extension piece and the second extension piece can be hidden by the hidden piece.

The seat back according to the present invention described in claim 3 is the invention described in claim 1 or claim 2, in which the upper edge of the long hole on the upper side of the seat is convex toward the lower side of the seat.

According to the present invention described in claim 3, the upper edge of the long hole on the upper side of the sheet is convex toward the lower side of the sheet. Therefore, when the second extension piece is passed through the long hole and pulled toward the upper side of the sheet, tension is generated in the part of the second extension piece that comes into contact with the convex part of the long hole, and as a result, it is possible to suppress the occurrence of wrinkles in the second extension piece.

The seat back according to the present invention described in claim 4 is the invention described in any one of claims 1 to 3, in which a plate-shaped locking plate extending in the seat width direction is provided at the end of the first extending piece, and the long hole is provided in the locking plate.

According to the invention described in claim 4, a long hole is provided in a plate-shaped locking plate portion extending in the sheet width direction provided at the end of the first extending piece portion. Therefore, compared to a configuration in which a long hole is provided directly on the first extending piece portion, deformation of the long hole portion is suppressed when the second extending piece portion is passed through the long hole portion and pulled toward the upper side of the sheet, and the occurrence of wrinkles in the second extending piece portion can be further suppressed.

The seat back according to the present invention described in claim 5 is the invention described in any one of claims 1 to 3, in which a frame-shaped locking frame portion is provided at the end of the first extending piece portion, with the seat width direction being the longitudinal direction, and the edge of the long hole portion is formed by the locking frame portion.

According to the invention described in claim 5, the edge of the long hole portion is formed by a frame-shaped locking frame portion provided at the end of the first extending piece portion, with the sheet width direction as the longitudinal direction. Therefore, as with the invention described in claim 4, compared to a configuration in which the long hole portion is provided directly on the first extending piece portion, deformation of the long hole portion during assembly of the seat can be suppressed, and the occurrence of wrinkles in the second extending piece portion can be further suppressed. In addition, the locking frame portion can be manufactured from a versatile metal material such as wire or bar steel.

The seat back according to the present invention described in claim 6 is the invention described in any one of claims 1 to 5, in which the second extension piece is configured by connecting a first fabric part provided continuously with the rear skin part and a second fabric part provided with the first hook-and-loop fastener at a seam, and the long hole part is engaged with the seam.

According to the present invention described in claim 6, the second extending piece is configured by connecting a first fabric part provided continuously with the rear skin part and a second fabric part provided with a first hook-and-loop fastener at a seam. The seam of the second extending piece engages with a long hole provided in the first extending piece. Therefore, in this invention, the connection point between the first extending piece and the second extending piece can be positioned.

As explained above, the seat back of the present invention has the excellent effect of simplifying assembly and disassembly work.

1 is a perspective view showing a schematic configuration of a vehicle seat according to an embodiment of the present invention, as viewed from the rear side of the seat; 2 is a cross-sectional view (cross-sectional view showing a state cut along line 2-2 in FIG. 1) seen from the vehicle width direction, which diagrammatically shows the configuration of a main part of the seat back according to the present embodiment. FIG. 2 is a rear view seen from the rear side of the seat, illustrating a schematic configuration of a main part during assembly of the vehicle seat according to the embodiment. FIG. FIG. 11 is a rear view showing a schematic configuration of a main part of a first modified example of a seat back according to the present embodiment. FIG. 11 is a rear view showing a schematic configuration of a main part of a second modified example of the seat back according to the embodiment; FIG. 13 is a rear view showing a schematic configuration of a main part of a third modified example of the seat back according to the embodiment; FIG. 11 is a cross-sectional view seen in the seat width direction, illustrating a schematic configuration of a main part of a fourth modified example of a seat back according to the present embodiment.

Below, an example of an embodiment of a seat 10 according to the present invention will be described with reference to Figures 1 to 7. Note that the arrows FR, UP, and LH shown appropriately in each figure indicate the front, upper, and left directions of the seat 10, respectively. Note that the seat 10 can be used as a seat in vehicles such as automobiles, trains, airplanes, and ships.

As shown in FIG. 1, the seat 10 includes a seat cushion 12 that supports the buttocks and thighs of the occupant, a "seat back 14" that supports the back of the occupant, and a headrest (not shown) that supports the head of the occupant.

The seat cushion 12 has a cushion pan (not shown) attached to the underside of the seat, and this cushion pan is supported on the vehicle floor (not shown) via guide rails (not shown) and the like.

On the other hand, as shown in FIG. 2, the seat back 14 includes a "seat back pad 16" that constitutes the main part of the seat back and is made of urethane foam, and this seat back pad 16 is supported by a seat back frame 17.

The seat back 14 also includes a skin portion 18 that covers the seat back pad 16 and forms the surface of the seat back 14. The skin portion 18 includes a first skin portion 20 that is disposed on the front side of the seat back pad 16, and a second skin portion 22 that is disposed on the rear side of the seat back pad 16.

In this embodiment, the portion of the first skin 20 below the seat and the portion of the second skin 22 below the seat are connected, and the configuration of these connection points is a feature. Below, we will explain in detail the configurations of the first skin 20 and the second skin 22, which are the main parts of this embodiment.

The first skin part 20 is made of, for example, a cloth material, leather, or synthetic leather, and its main portion is arranged along and covers the front surface of the seatback pad 16. In the following, the portion of the first skin part 20 that covers the front surface of the seatback pad 16 will be referred to as the "front skin part 20A."

On the other hand, the portion of the first skin portion 20 from the front skin portion 20A to the seat lower side is the "front extension portion 20B" as the first extension portion, and the front extension portion 20B extends to the rear side of the seat back pad 16 via the seat lower side of the seat back pad 16. And, the "end portion 20B1" of the front extension portion 20B is provided with a "locking plate portion 24" as shown in FIG. 3.

The locking plate 24 is made of a resin plate, extends in the seat width direction, and has a rectangular outer periphery when viewed in the thickness direction. The locking plate 24 is provided with a long hole 26 extending in the seat width direction, and the upper edge 26A of the long hole 26 on the upper side of the seat is V-shaped with an apex in the center of the seat width direction when viewed in the thickness direction and convex toward the lower side of the seat. The locking plate 24 is attached to the front extension piece 20B by a stitching 28. The cross section of the upper edge 26A side of the locking plate 24 when viewed in the seat width direction is arc-shaped and protrudes toward the long hole 26.

On the other hand, the second skin portion 22 is made of the same material as the first skin portion 20, and its main portion is disposed along the rear surface of the seatback pad 16, covering said rear surface. In the following, the portion of the second skin portion 22 that covers the rear surface of the seatback pad 16 will be referred to as the "rear skin portion 22A."

On the other hand, the portion of the second skin portion 22 from the rear skin portion 22A to the lower side of the seat is the "rear extension portion 22B" which serves as the second extension portion. The "first hook-and-loop fastener 30" and the "second hook-and-loop fastener 32" are provided on the rear extension portion 22B.

More specifically, the first hook fastener 30 is made of a fabric material that has multiple hook portions (not shown) and extends in the seat width direction, and is provided on the surface of the "end portion 22B1" of the rear extension piece 22B that is continuous with the surface of the rear skin portion 22A.

The second hook-and-loop fastener 32, on the other hand, is made of a fabric material that has multiple loops (not shown) and extends in the seat width direction, and is provided on the surface of the rear extension piece 22B that is continuous with the surface of the rear skin part 22A in the upper part of the seat. The length of the second hook-and-loop fastener 32 in the seat width direction is set to be approximately the same as the length of the first hook-and-loop fastener 30 in the seat width direction, and the length of the rear extension piece 22B in the extension direction is set to be approximately 5 to 10 times the length of the first hook-and-loop fastener 30 in the extension direction. The second hook-and-loop fastener 32 may be provided on the lower part of the seat in the rear skin part 22A.

In this embodiment, the portion of the rear extension piece 22B on the end 22B1 side passes through the inside of the long hole 26 of the locking plate 24 and is locked to the long hole 26, and the first hook-and-loop fastener 30 is joined to the second hook-and-loop fastener 32, so that tension is applied to the front extension piece 20B and the rear extension piece 22B.

In this embodiment, the second skin portion 22 is provided with a "hidden piece 34" made of the same material as the second skin portion 22. The length of this hidden piece 34 in the seat width direction is set to be approximately the same as the length of the rear skin portion 22A in the seat width direction, and the hidden piece 34 extends downward from the boundary between the rear skin portion 22A and the rear extending piece 22B. When viewed from the rear side of the seat, the hidden piece 34 covers the rear extending piece 22B and the locking plate portion 24.

<Actions and Effects of the Present Embodiment>
Next, the operation and effects of this embodiment will be described.

In this embodiment, as shown in FIG. 2, the front surface of the seat back pad 16 capable of supporting the back of the occupant is covered with a front skin portion 20A, and a front extension piece portion 20B extends from the front skin portion 20A to the rear surface side of the seat back pad 16 via the seat lower side of the seat back pad 16. The front extension piece portion 20B is provided with a long hole portion 26 extending in the seat width direction on the end portion 20B1 side.

On the other hand, a rear extension piece 22B extends downward from the rear skin part 22A that covers the rear surface of the seatback pad 16, and as shown in FIG. 3, this rear extension piece 22B passes through the inside of the long hole part 26 and is engaged with this long hole part 26.

In this embodiment, a first hook-and-loop fastener 30 is provided on the end 22B1 side of the rear extension piece 22B, and a second hook-and-loop fastener 32 is provided on the portion of the rear extension piece 22B on the rear skin portion 22A side.

Therefore, in this embodiment, by pulling the rear extension piece 22B through the long hole 26 toward the upper side of the seat, the periphery of the long hole 26 in the front extension piece 20B moves toward the upper side of the seat according to the amount of pulling of the rear extension piece 22B. As a result, tension is generated in the lower part of the front skin part 20A and the lower part of the rear skin part 22A, which are in close contact with the seat back pad 16. Then, in this state, by joining the first hook-and-loop fastener 30 to the second hook-and-loop fastener 32, the front skin part 20A and the rear skin part 22A are maintained in close contact with the seat back pad 6. That is, in this embodiment, the lower part of the front skin part 20A and the lower part of the rear skin part 22A can be fixed to the seat back pad 16 only by working on the surface side of the seat back 14.

On the other hand, when dismantling the seat back 14, the first hook-and-loop fastener 30 and the second hook-and-loop fastener 32 are released from their connection, and the rear extension piece 22B is removed from the long hole 26, thereby releasing the fixed state between the seat lower portion of the front skin portion 20A and the seat lower portion of the rear skin portion 22A and the seat back pad 16.

In addition, in this embodiment, a hidden piece 34 is provided on the rear skin portion 22A, and this hidden piece 34 covers the long hole portion 26 provided on the rear extension piece 22B and the front extension piece 20B when viewed from the rear side of the seat. Therefore, in this embodiment, the hidden piece 34 can hide the connection point between the front extension piece 20B and the rear extension piece 22B.

In addition, in this embodiment, the upper edge 26A of the long hole 26 on the upper side of the sheet is convex toward the lower side of the sheet. Therefore, when the rear extension piece 22B is passed through the long hole 26 and pulled toward the upper side of the sheet, tension is generated in the part of the rear extension piece 22B that comes into contact with the convex part of the long hole 26, and as a result, the occurrence of wrinkles in the rear extension piece 22B can be suppressed.

In addition, in this embodiment, as shown in FIG. 3, a long hole 26 is provided in a plate-shaped locking plate 24 extending in the seat width direction provided at the end 20B1 of the front extending piece 20B. Therefore, compared to a configuration in which the long hole 26 is provided directly on the front extending piece 20B, deformation of the long hole 26 is suppressed when the rear extending piece 22B is passed through the long hole 26 and pulled toward the upper side of the seat, and the occurrence of wrinkles in the rear extending piece 22B can be further suppressed.

As described above, the seat back 14 according to this embodiment can simplify assembly and disassembly.

<Second Modification>
Next, a first modified example of the present embodiment will be described with reference to Fig. 4. In this first modified example, a pair of "locking frames 40" are provided instead of the locking plates 24 at the end 20B1 of the front extension piece 20B.

In more detail, the locking frame 40 is formed by bending wire or steel bar into a sheet shape, roughly forming a rectangular frame with the sheet width direction as the longitudinal direction, and its inner periphery forms the long hole 26. In other words, the locking frame 40 can be considered to form the edge of the long hole 26.

The locking frame 40 is attached to the front extension piece 20B by wrapping the end 20B1 of the front extension piece 20B around the lower frame 40A, which extends linearly in the seat width direction, and sewing the overlapping portions together.

On the other hand, the upper frame portion 40B, which faces the lower frame portion 40A in the locking frame portion 40, constitutes the upper edge portion 26A of the long hole portion 26, and although not shown in FIG. 4, the rear extension piece portion 22B is wrapped around the upper frame portion 40B.

This configuration, compared to a configuration in which the long hole portion 26 is provided directly in the front extension piece portion 20B, makes it possible to suppress deformation of the long hole portion 26 during assembly of the seat 10 and to further suppress the occurrence of wrinkles in the rear extension piece portion 22B. In addition, the locking frame portion 40 can be manufactured from the versatile metal material described above, such as wire or bar steel.

The upper frame portion 40B of the locking frame portion 40 is configured in a V-shape with an apex in the center of the seat width direction, but the upper frame portion 40B may be configured in a zigzag or wavy shape. The same applies to the upper edge portion 26A of the long hole portion 26 in the locking plate portion 24.

<Second Modification>
Next, a second modification of the present embodiment will be described with reference to Fig. 5. In this second modification, a pair of "locking frames 50" are provided instead of the locking plates 24 at the end 20B1 of the front extension piece 20B.

More specifically, like the locking frame 40, the locking frame 50 is constructed by bending wire or steel bar into a rounded rectangular shape, and is spaced apart from each other in the seat width direction. In this modified example, the end 20B1 of the front extension piece 20B is branched into multiple parts, specifically into two branches, and each branched part is wrapped around a part of the locking frame 40 and the overlapping parts are sewn together, thereby attaching the pair of locking frames 40 to the front extension piece 20B.

In this modified example, although not shown in FIG. 5, the rear extension piece 22B is also branched in the same manner as the front extension piece 20B, and a first hook-and-loop fastener 30 is provided at the end of each branched portion.

With this configuration, even if the seat back 14 becomes larger in the seat width direction, the front extension piece 20B and the rear extension piece 22B can be connected at multiple points, preventing wrinkles from occurring therebetween.

<Third Modification>
Next, a third modification of the present embodiment will be described with reference to Fig. 6. In this third modification, the long hole 26 is provided directly on the end 20B1 of the front extension piece 20B. More specifically, a reinforcing thread 60 is overlocked around the periphery of the long hole 26 in the front extension piece 20B to provide a reinforcing portion 62.

This configuration allows for a reduction in the number of parts compared to a configuration in which a locking plate portion or a locking frame portion is provided at the end portion 20B1 of the front extension piece 20B.

<Fourth Modification>
Next, a fourth modified example of the present embodiment will be described with reference to Fig. 7. In this fourth modified example, an "additional fabric portion 70" is attached to the rear extension piece 22B, and a protective plate portion 72 is attached to each of the rear extension piece 22B and the additional fabric portion 70.

The additional fabric portion 70 is made of the same material as the second skin portion 22, and its length in the seat width direction is set to be the same as the length of the rear extension piece portion 22B in the seat width direction. One end portion 70A of the additional fabric portion 70 is connected to the end portion 22B1 of the rear extension piece portion 22B by a "seam portion 74." In the following, the assembly of the additional fabric portion 70 and the rear extension piece portion 22B configured as described above will be referred to as the "composite piece portion 76."

In addition, in this modified example, the first hook-and-loop fastener 30 is provided on the other end 70B of the additional fabric portion 70. That is, in this modified example, the rear extension piece 22B functions as the first fabric portion, the additional fabric portion 70 functions as the second fabric portion, and the composite piece portion 76 functions as the second extension piece. In addition, in this modified example, the long hole portion 26 is engaged with the stitching portion 74.

On the other hand, the protective plate portion 72 is made of resin and has a rectangular plate shape with the seat width direction as the longitudinal direction. One protective plate portion 72 is attached at a joint (not shown) by adhesive, sewing, etc. near the seam portion 74 in the rear extension piece portion 22B, and the other protective plate portion 72 is attached at a joint (not shown) by adhesive, sewing, etc. near the seam portion 74 in the additional fabric portion 70.

According to this configuration, the composite piece 76 is configured by connecting the rear extension piece 22B, which is provided continuously with the rear skin portion 22A, and the additional fabric portion 70, which is provided with the first hook-and-loop fastener 30, with a stitching portion 74. The long hole portion 26 provided in the front extension piece 20B is engaged with the stitching portion 74 of the additional fabric portion 70. Therefore, in this modified example, the connection point between the front extension piece 20B and the composite piece 76 can be positioned.

14 Seat back 16 Seat back pad 20A Front skin portion 20B Front extension piece portion (first extension piece portion)
20B1 End portion 22A Rear skin portion 22B Rear extending piece portion (second extending piece portion, first cloth portion)
22B1 End 24 Locking plate portion 26 Long hole portion 26A Upper edge portion 30 First hook-and-loop fastener 32 Second hook-and-loop fastener 34 Hidden piece portion 40 Locking frame portion 50 Locking frame portion 70 Additional fabric portion (second fabric portion)
74 Suture part 76 Composite piece part (second extending piece part)

Claims (6)

a first extending piece portion that extends from a front skin portion covering a front surface of a seat back pad capable of supporting a back of an occupant to a rear surface side of the seat back pad via a seat lower side of the seat back pad and has a long hole portion provided at an end portion thereof extending in a seat width direction;
a second extension piece extending from a rear surface portion covering a rear surface of the seat back pad toward a seat lower side and having a portion passing through an inside of the long hole portion and being engaged with the long hole portion;
a first hook-and-loop fastener provided on an end side of the second extending piece;
a second hook-and-loop fastener provided on at least one of the rear skin portion and a portion of the second extension piece on the rear skin portion side and joined to the first hook-and-loop fastener;
A seat back having a seat back. the rear skin portion is provided with a hidden piece portion that covers the second extending piece portion and the long hole portion when viewed from the rear side of the seat,
The seat back according to claim 1 . The upper edge of the long hole on the upper side of the seat is convex toward the lower side of the seat.
The seat back according to claim 2. A plate-shaped locking plate portion extending in the seat width direction is provided at an end of the first extending piece portion, and the long hole portion is provided in the locking plate portion.
The seat back according to claim 3. A frame-shaped locking frame portion having a longitudinal direction in the seat width direction is provided at an end of the first extending piece portion, and an edge of the long hole portion is configured by the locking frame portion.
The seat back according to claim 3. the second extension piece portion is configured by connecting a first fabric portion provided continuously with the rear skin portion and a second fabric portion provided with the first hook-and-loop fastener at a stitched portion,
The long hole portion is engaged with the stitching portion.
The seat back according to claim 4 or 5.