JP2017038866A - Vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a crack developed from a needle hole of a seat cover made of natural leather inconspicuous as far as possible by a comparatively simple configuration.SOLUTION: In a vehicular seat having a suture line L1 formed by sewing suture margin parts E1, E2 provided respectively at the ends of adjacent skin pieces SP1, SP2 made of natural leather together to turn inside out with a plurality of needle holes 10 formed along the suture line L1 with suitable intervals, the plurality of needle holes 10 each have an opening shape of a side part 11 extending along the suture line L1, a pair of corners 21, 22 formed at both ends of the side part 11, and another corner 23 formed by other side parts 12, 13 extending from the pair of corners 21, 22, respectively, so that the other corner 23 is arranged on the side of the suture margin parts E1, E2 than on the side of the suture line L1.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle seat provided with a seat cover having a suture line formed between adjacent skin pieces made of natural leather and a needle hole formed along the suture line.

  In this type of vehicle seat, natural leather may be used as a material for a seat cover constituting the design surface. The silver surface forming the surface of this natural leather has a structure in which fine fibers are entangled like a non-woven fabric and are relatively easy to tear. For this reason, at the time of sewing using a sewing machine, there is a concern that the seat cover may be torn with the needle hole of the sewing machine as a base point, and this tear will appear on the design surface of the sheet and the design properties will deteriorate. Therefore, in the technique disclosed in Patent Document 1, when forming a seat cover by stitching together a plurality of skin pieces, the end portions that serve as seam allowance portions of these skin pieces are overlapped in a middle surface shape, and further, the ends of these end portions are overlapped. Each side is folded back so as to be J-shaped in cross-sectional view. Then, the end portion of the skin piece is stitched together with the folded end portion, and the suture line formed at this time is arranged in the seat inward of the seat cover portion constituting the design surface. By doing so, even if the seat cover tears from the needle hole of the sewing machine as a base point, it is possible to avoid the tear from appearing excessively on the design surface of the sheet as much as possible.

JP 2005-328991 A

  By the way, in the known technique, when the skin pieces are stitched together, it is necessary to fold back the end portions that become the seam allowance portions of these skin pieces. For this reason, in the configuration of the known technique, the work of forming the seat cover is troublesome and the skin piece portion serving as a seam allowance tends to increase, resulting in a wasteful configuration. However, referring to FIG. 4 of the publicly known technique, after the end portion which becomes the seam allowance portion of the skin piece is overlapped in the middle surface shape, a plate-like support member made of resin can be overlapped as an alternative to the folded portion at the end. However, this increases the number of parts and may adversely affect the flexibility of the seat cover. The present invention was devised in view of the above-mentioned points, and the problem to be solved by the present invention is to make the tear generated from the needle hole of the seat cover made of natural leather as inconspicuous as possible by a relatively simple configuration. There is to do.

  As means for solving the above-described problems, the vehicle seat of the first invention includes a seat cover that constitutes a design surface. And the seat cover is formed by stitching a plurality of skin pieces made of natural leather, and stitched lines formed by sewing together seam margins provided at the end portions of adjacent skin pieces in a middle surface shape. A plurality of needle holes are formed at appropriate intervals along the suture line. In this type of configuration, the natural leather seat cover may be torn with the needle hole as a starting point, and it is desirable to make this tear as inconspicuous as possible with a relatively simple configuration.

  Therefore, in the present invention, each of the opening shapes of the plurality of needle holes has side portions extending along the suture line, a pair of corner portions formed at both ends of the side portion, and other sides respectively extending from the pair of corner portions. The other corners are arranged closer to the seam allowance than the suture line. In the present invention, with a relatively simple configuration in which the opening of the needle hole is an appropriate polygonal shape, the corner of the needle hole that triggers tearing is positioned along the suture line and the position on the seam allowance part side. To form. By doing so, even if a tear occurs from the needle hole, it is possible to avoid as much as possible that the tear is directed to the side of the design surface opposite to the seam allowance.

  According to the first aspect of the present invention, a relatively simple structure can make a tear formed from a needle hole of a seat cover made of natural leather as inconspicuous as possible.

It is a perspective view of a vehicle seat. It is a perspective view of a part of the seat back. It is a perspective view of a part of seat cover at the time of sewing. It is an enlarged perspective view of a part of the seat cover showing the needle hole. It is a perspective view of a part of seat cover after stitching. It is a side view of a sewing needle. It is a side view of the needle end of the sewing machine. FIG. 8 is a cross-sectional view of a sewing needle corresponding to a cross section taken along line VIII-VIII in FIG. 7.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to FIGS. 1 and 2, reference symbol F denotes the front of the vehicle seat, reference symbol B to the rear of the vehicle seat, reference symbol UP to the upper side of the vehicle seat, reference symbol DW to the lower side of the vehicle seat, reference symbol R to the right of the vehicle seat. The symbol L is attached to the left side of the sheet. The vehicle seat 2 in FIG. 1 includes a seat cushion 4, a seat back 6, and a headrest 8. Each of these seat constituent members includes a seat frame (4F, 6F, 8F) forming a seat skeleton, a seat pad (4P, 6P, 8P) forming a seat outer shape, and a seat cover (4S, 6S, 8S). In this embodiment, the lower portion of the seat back 6 is connected to the rear portion of the seat cushion 4 so as to be able to rise and fall, and the headrest 8 is disposed on the upper portion of the seat back 6 in the standing state. A pair of rod-like headrest stays 8 a are provided below the headrest 8, and the headrest stays 8 a are respectively inserted into holders HM exposed from the upper surface of the seat back 6.

  In the seat back 6, a seat cover 6S is placed on a seat pad 6P on a seat frame 6F (not shown) to form a design surface of the seat (details of each member will be described later). The seat cover 6S is formed by sewing a plurality of skin pieces SP1 to SP5 and the like into a bag shape. With reference to FIGS. 1 to 5, the plurality of suture lines L1 to L4 and each suture line L1. A plurality of needle holes 10 are formed along L4 (note that needle holes are not shown in FIGS. 1 and 2 for convenience). And some skin pieces SP1-SP5 (detailed later) constituting the seat cover 6S are made of natural leather and are relatively easy to tear. For this reason, at the time of sewing the seat cover 6S, there is a concern that the seat cover 6S will be torn with the needle hole 10 as a base point, and this tear will appear excessively on the design surface of the sheet and the design will deteriorate. Therefore, in this embodiment, the tear formed from the needle hole 10 of the natural leather seat cover 6S is made as inconspicuous as possible by a simple configuration described later. Hereinafter, each configuration will be described in detail.

[Basic configuration]
Here, the seat frame 6F (not shown) is typically a substantially arch-shaped frame, and can be formed of a material such as metal or hard resin having excellent rigidity. A pair of cylindrical holders HM are fixed to the seat frame 6F with reference to FIG. 1 and FIG. 2, and the pair of holders HM are exposed from the upper surface of a seat cover 6S, which will be described later. 8a is arranged to be insertable. The seat pad 6P (not shown) is a substantially rectangular member in a front view that forms the outer shape of the seat, and has a seating portion 6a and a bank portion 6b with reference to FIG. Examples of the material of the seat pad 6P include foamed resin such as polyurethane foam (density: 10 kg / m ^{3 to} 60 kg / m ³ ). And the seating part 6a is a substantially flat site | part which makes the center of the seat back 6 in a seat width direction. The bank portions 6b are portions disposed on both sides of the seating portion 6a, respectively, and can protrude from the seating portion 6a toward the seating side to support the occupant side portion during curve traveling.

[Seat Cover]
1 and 2, the seat cover 6S is a bag-like member that constitutes the design surface of the seat back 6, and is formed by sewing a plurality of skin pieces. In the present embodiment, the seat cover 6S portion that covers the seating surface, the side surface, and the rear surface, which are the design surfaces of the seat pad 6P, is formed of a plurality of skin pieces SP1 to SP5 made of natural leather. For example, referring to FIG. 1, the first skin piece SP1 and the second skin piece SP2 are skin pieces made of natural leather that cover the seating surface of the seating portion 6a, and the third skin piece SP3 is a skin portion 6b. It is a skin piece made of natural leather that covers the seating surface. Referring to FIG. 2, the fourth skin piece SP4 is a skin piece made of natural leather that covers the portion from the side surface to the rear surface of the bank portion 6b, and the fifth skin piece SP5 includes the seat portion 6a and the bank portion. It is a skin piece made of natural leather that covers the portion from the upper surface to the rear surface of 6b.

  Here, the kind of natural leather forming the first skin piece SP1 to the fifth skin piece SP5 is not particularly limited, but animal-based natural leather such as cow leather, horse leather, pig leather, deer leather, sheep leather, goat leather, kangaroo leather, etc. Examples include reptile natural leather. Further, the skin pieces (not shown) other than the first skin piece SP1 to the fifth skin piece SP5 may be made of natural leather or may be formed of another material. As another material of this kind, a fabric (woven fabric, knitted fabric, non-woven fabric) or leather (natural leather, synthetic leather) made of natural fibers or synthetic fibers can be exemplified.

[Suture line]
The plurality of suture lines (the first suture line L1 to the fourth suture line L4) are suture locations where adjacent epidermis pieces are stitched with in-stitches (see each suture line). The forming method will be described later). For example, referring to FIG. 1, the first stitch line L1 is a stitched portion of the first skin piece SP1 and the second skin piece SP2, and is formed at the center in the vertical direction of the seating portion 6a and extends in the seat width direction. The second suture line L2 is a stitched portion of the skin pieces SP1 and SP2 covering the seat portion 6a and the third skin piece SP3 covering the bank portion 6b, and is formed between the seat portion 6a and the bank portion 6b. Extends vertically. The third stitch line L3 is a stitched portion of the skin pieces SP2 and SP3 covering the seating side and the skin pieces SP4 and SP5 covering the side surface or the rear surface, and is formed along the periphery of the seating surface of the seat back 6. The fourth stitch line L4 is a stitched portion of the fourth skin piece SP4 and the fifth skin piece SP5 with reference to FIG. 2, and is formed at the upper part of the side surface of the seat back 6 and extends to the front and rear of the seat. It arrange | positions in cross shape with respect to the line L3.

  Here, since the configurations of the suture lines L1 to L4 are substantially the same, the configuration of the first suture line L1 will be described as an example. Referring to FIG. 3, the first stitching line L1 includes a first seam allowance E1 provided at the upper end of the first skin piece SP1 and a second seam allowance provided at the lower end of the second skin piece SP2. It is formed by stitching E2. Then, referring to FIG. 5, the first skin piece SP1 and the second skin piece SP2 are spread out in a direction away from each other with the first suture line L1 as a base point, thereby covering the seating portion 6a. Thus, the seat cover 6S portion constituting the design surface can be formed. In the covering state of the seat cover 6S, the first stitching line L1 is disposed in the vicinity of the boundary between the two skin pieces SP1 and SP2, and the seam allowances E1 and E2 are overlapped in the middle surface. Thus, it is arranged so as to protrude to the seat pad side.

[Needle hole]
The needle hole 10 is a through hole of the seat cover 6S through which the thread material forming the suture lines L1 to L4 passes. In this embodiment, a plurality of needle holes 10 are formed at appropriate intervals along the suture lines L1 to L4, and the configuration of each needle hole 10 is substantially the same. With reference to the needle hole 10 provided in the first suture line L1, the configuration thereof will be described. Referring to FIG. 4, the needle hole 10 has an approximately equilateral triangular opening shape, and corresponds to the first side 11 corresponding to the side of the present invention and the other side of the present invention. It has the 2nd side part 12, the 3rd side part 13, and the some corner | angular parts 21-23. The first side portion 11 is a linear side portion extending along the first suture line L <b> 1 and forms the bottom side of the needle hole 10. The second side 12 is a straight side connected to one end of the first side 11 at about 60 °, and the third side 13 is connected to the other end of the first side 11 at about 60 °. It is a straight side. And while the 2nd side part 12 and the 3rd side part 13 are extended toward the seam allowances E1 and E2, the vertex of the needle hole 10 is formed because these front-end | tips are connected at about 60 degrees.

  A first corner 21 is formed between one end of the first side 11 and the second side 12, and a second corner 22 is formed between the other end of the first side 11 and the third side 13. Is formed. The first corner portion 21 and the second corner portion 22 are acute angles facing the extending direction of the first suture line L1, and are arranged along the first suture line L1. And the 3rd triangular part 23 formed between the 2nd side part 12 and the 3rd side part 13 is arrange | positioned rather than the 1st suture line L1 at the seam allowance parts E1 and E2 side. In the covered state of the seat cover 6S, the bottom side of the needle hole 10 is slightly exposed to the seat cover 6S portion constituting the design surface with reference to FIG. 5, and the apex side of the needle hole 10 is set to each seam allowance E1. , E2 are arranged on the seat pad side and are not exposed on the design surface side.

[Method of forming seat cover]
With reference to FIGS. 3 to 5, a method of forming the seat cover 6 </ b> S will be described by taking the first skin piece SP <b> 1 and the second skin piece SP <b> 2 as an example. In the present embodiment, a first suture line L1 is formed using a sewing machine (not shown) while sewing the first skin piece SP1 and the second skin piece SP2. The sewing machine needle 30 of this sewing machine is provided with a substantially triangular pyramid-shaped cutting edge 30a at the tip with reference to FIGS. The cutting edge 30 a has a substantially equilateral triangular shape in cross-sectional view, and includes a first surface portion 31, a second surface portion 32, and a third surface portion 33. Each of these surface portions 31 to 33 is set to have the same maximum length dimension BL1 on the base side, and gradually becomes smaller toward the tip. The corner between the first surface portion 31 and the second surface portion 32 becomes the first blade edge portion 41, and the corner between the first surface portion 31 and the third surface portion 33 becomes the second blade edge portion 42, and the second surface portion. The corner between 32 and the third surface portion 33 becomes the third cutting edge portion 43. Then, the upper thread of the sewing needle 30 is entangled with the lower thread on the back side of both skin pieces SP1 and SP2 by cutting the both skin pieces SP1 and SP2 with these blade edge portions 41 to 43 and passing the sewing needle 30 through them. be able to.

  In the present embodiment, when sewing with the sewing machine, the first surface portion 31 of the sewing needle 30 is disposed along the first suture line L1 shown in FIG. 4, and the second surface portion 32 and the third surface portion 33 are arranged. It arrange | positions toward the seam allowances E1 and E2 side shown in FIG. In this state, the substantially needle-shaped needle hole 10 shown in FIG. 4 is formed in both skin pieces SP1 and SP2 by cutting the both needle pieces 41 and 43 through the sewing needle 30 while cutting both skin pieces SP1 and SP2. be able to. At this time, in the needle hole 10, the first corner portion 21 is formed by the first blade edge portion 41, and the second corner portion 22 is formed by the second blade edge portion 42. The first corner portion 21 and the second corner portion 22 are acute angles facing the extending direction of the first suture line L1 as described above, and are arranged along the first suture line L1. Moreover, the 3rd blade edge part 43 forms the 3rd triangular part 23, and this 3rd triangular part 23 will be arrange | positioned rather than the 1st suture line L1 at the seam allowance part E1, E2 side as above-mentioned. Thus, in the present embodiment, the needle hole 10 having an appropriate shape can be formed in the seat cover 6S by sewing while arranging the substantially triangular pyramid-shaped cutting edge 30a in an appropriate direction.

[Bearing behavior in the seat cover]
In this embodiment, as described above, the skin pieces SP1 to SP5 of the seat cover 6S are made of natural leather and are relatively easy to tear. For this reason, with reference to FIG. 4, for example, when sewing the first skin piece SP1 and the second skin piece SP2, tears S1 to S3 may occur in the triangular needle hole 10 using the corners 21 to 23 as a trigger. is there. And when this tear S1-S3 extends in the direction (direction shown by arrow D1 in FIG. 4) which leaves | separates from each seam allowance part E1, E2, it is concerned that it may appear on the design surface of a sheet | seat and design property may deteriorate. The

  Therefore, in the present embodiment, referring to FIG. 5, the first corner portion 21 and the second corner portion 22 of the needle hole 10 which are triggers when each tear occurs are arranged at positions along the first suture line L1. In addition, the third triangular portion 23 is disposed at a position on the side of the seam allowances E1, E2 with respect to the first suture line L1. For this reason, even if the first corner portion 21 and the second corner portion 22 trigger the tear, the tears S1 and S2 extend along the first suture line L1 without going to the design surface side. Even if a tear occurs due to the third triangular portion 23, the tear S3 extends toward the seam allowances E1, E2 without going toward the design surface. In this way, in this embodiment, even if tearing occurs from the needle hole 10, it is possible to avoid as much as possible that the tears S1 to S3 are directed toward the design surface opposite to the seam allowances E1 and E2.

  As described above, in the present embodiment, the corner portions 21 to 23 of the needle hole 10 that are the triggers when tearing is generated by the simple configuration in which the opening of the needle hole 10 has an appropriate polygonal shape is used as the first suture line L1. And a position on the seam allowances E1, E2 side. Even if tearing occurs from the needle hole 10 in this way, it is possible to avoid as much as possible that the tears S1 to S3 are directed toward the design surface opposite to the seam allowances E1 and E2. Therefore, according to the present embodiment, the tears S1 to S3 generated from the needle holes 10 of the seat cover 6S made of natural leather can be made as inconspicuous as possible with a relatively simple configuration.

  The vehicle seat of the present embodiment is not limited to the above-described embodiment, and can take other various embodiments. In the present embodiment, the substantially equilateral triangular needle hole 10 is exemplified, but the configuration (shape, size, number of formations, etc.) of the needle hole is not limited. For example, the needle hole can be exemplified by various triangular shapes such as a right triangle and an isosceles triangle, various quadrangular shapes such as a square and a rectangle, and a polygonal shape such as a pentagon or more in a top view. At this time, the first corner and the second corner are preferably right angles or acute angles, but may be obtuse if the tear does not occur extremely on the design surface side. Further, the side part of the needle hole arranged along the suture line can take various shapes such as a straight line and a curved line that is less likely to trigger tearing than the corner part. One or a plurality of other corners can be formed in the needle hole. For example, in the case of a needle hole having a polygonal shape of a quadrangle or more, a plurality of other corners are formed.

  Further, the maximum length dimension of each surface portion of the blade edge is not particularly limited, but is preferably smaller than the diameter of the thread material forming the suture line. Further, when the suture lines do not cross each other, the maximum length of each surface portion can be made larger than the diameter of the thread material forming the suture line. The shape of the blade edge can also be appropriately changed according to the shape of the needle hole to be formed.

  And the structure of this embodiment is applicable to the seat cover of vehicle seats, such as a vehicle, an aircraft, and a train. The configuration of the vehicle seat can be changed as appropriate.

2 Vehicle Seat 4 Seat Cushion 6 Seat Back 8 Headrest 6F Seat Frame 6P Seat Pad 6S Seat Cover 10 Needle Hole 11 First Side 12 Second Side 13 Third Side 21 First Corner 22 Second Corner 23 Third triangular portion 30 Sewing needle 30a Cutting edge 31 First surface portion 32 Second surface portion 33 Third surface portion 41 First cutting edge portion 42 Second cutting edge portion 43 Third cutting edge portion CP Intersection D1 Arrow lines E1 to E6 Sewing allowance portion L1 L4 suture line SP1 to SP5 skin piece S1 to S3 tear

Claims (1)

A seat cover that constitutes a design surface is provided, and the seat cover is formed by stitching a plurality of skin pieces made of natural leather, and includes a seam allowance provided between end portions of the adjacent skin pieces. In a vehicle seat having a suture line formed by stitching together in a table shape, and a plurality of needle holes formed at appropriate intervals along the suture line,
The openings of the plurality of needle holes each have side portions extending along the suture line, a pair of corner portions formed at both ends of the side portions, and other side portions respectively extending from the pair of corner portions. The vehicle seat has the other corner portion formed by the step, and the other corner portion is disposed closer to the seam allowance portion than the suture line.

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