JP2017105388A - Vehicle sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce disturbance of a sewing line of a skin which uses a soft material such as a soft resin molding.SOLUTION: A vehicle sheet has a skin covering a pad. The skin has a first skin having a plurality of first notches on its terminal, a second skin that is formed of a soft material and has a plurality of second notches on its terminal, and a yarn that overlaps the plurality of first notches and the plurality of second notches, and sews the first skin and the second skin. The plurality of first notches are positioned on a projecting curved terminal in the outside of the first skin, the plurality of second notches are positioned on a recessed curved terminal in the inside of the second skin, and tips of the plurality of first notches and second notches are round-shaped in plan view.SELECTED DRAWING: Figure 15

Description

  The present disclosure relates to a vehicle seat, and can be applied to a vehicle seat using a soft material for a skin, for example.

The vehicle seat includes a seat cushion, which is a part on which a person puts a buttock, and a seat back on which a person deposits his back. Each of the seat cushion and the seat back includes a frame, a pad supported by the frame, and a skin (trim cover) covering the pad. The epidermis covers the surface of the pad, and the end portion of the epidermis is fixed to the frame via an attachment member.
For example, Japanese Patent Laid-Open No. 2014-8794 (Patent Document 1) states that “The seat cushion cushion trim cover used in the automobile seat of the present invention has a plurality of folds in the middle portion in the vertical direction. The lower end portion is molded with a soft resin in a cross-sectional shape that forms a groove shape, and is sewn to the main trim cover at the peripheral end excluding the lower end portion, and the end of the side finisher is It is inserted into the lower end portion so that it can be inserted into the seat cushion frame.

JP 2014-8794 A

If a V-shaped notch is provided in the soft resin molded product as a mark for stitching the skin of the soft resin molded product with the skin such as leather, there is a concern about tearing. On the other hand, if the notch is not provided, the sewing line may be disturbed due to the accumulation of the sewing allowance.
The subject of this indication is providing the vehicle seat which reduces disturbance of the sewing line of an outer skin using soft materials, such as a soft resin molding.
Other problems and novel features will become apparent from the description of the specification and the accompanying drawings.

An outline of typical ones of the present disclosure will be briefly described as follows.
That is, the vehicle seat includes a skin, a base body to which the skin is attached, and a pad disposed between the skin and the base body. The skin has a first skin having a plurality of first notches at the terminal, a second skin formed of a soft material and having a plurality of second notches at the terminal, and the plurality of first notches. And the plurality of second notches, and a thread for sewing the first skin and the second skin. The plurality of first notches are located at curved terminals that protrude outward from the first skin. The plurality of second notches are located at a curved end that is concave to the inside of the second skin. The ends of the plurality of first notches and the second notches are rounded in plan view.

  According to the above vehicle seat, it is possible to reduce the disturbance of the sewing line.

The perspective view of the vehicle seat which concerns on an Example. 1 is a perspective view of the seat back of FIG. AA sectional view of Fig. 2 (when not loaded) AA sectional view of Fig. 2 (when loaded) The perspective view which shows the state which looked at the seat back of FIG. 1 from the back side Enlarged view of part C in FIG. The perspective view of the seat back of FIG. A perspective view of the second epidermis of FIG. Enlarged view of part D in FIG. 1 is a perspective view of the seat cushion of FIG. KK sectional view of FIG. The perspective view of the vehicle seat which concerns on an Example. The top view for demonstrating the terminal part of the skin which concerns on a comparative example The perspective view for demonstrating sewing of the skin which concerns on a comparative example The top view for demonstrating the terminal part of the skin which concerns on an Example The figure for demonstrating the sewing procedure with the skin which concerns on an Example. The figure for demonstrating the sewing procedure with the skin which concerns on an Example. The figure for demonstrating the sewing procedure with the skin which concerns on an Example. The top view for demonstrating the terminal part of the skin which concerns on the modification 1 The top view for demonstrating the terminal part of the skin which concerns on the modification 2 The top view for demonstrating the sewing line and seam allowance of the skin which concern on the modification 2. FIG. 19 is a cross-sectional view corresponding to the line M-M ′ after stitching the skin of FIG. The top view for demonstrating the terminal part of the skin which concerns on the modification 3

  Hereinafter, examples and modifications will be described with reference to the drawings. However, in the following description, the same components may be denoted by the same reference numerals and repeated description may be omitted. In order to clarify the description, the drawings may be schematically represented with respect to the width, thickness, shape, etc. of each part as compared to the actual embodiment, but are merely examples, and the interpretation of the present invention is not limited to them. It is not limited.

  FIG. 1 is a perspective view of a vehicle seat according to the embodiment. FIG. 2 is a perspective view of the seat back of FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2 (when no load is applied). 4 is a cross-sectional view taken along the line AA in FIG. 2 (when loaded).

  The vehicle seat 1 includes a seat cushion 2 that is a portion on which a seated person places a buttocks, a seat back 3 on which the seated person deposits his back, and a headrest 9 on which the seated person's head is deposited.

  The seat cushion 2 includes a frame 4 having a skeletal structure, a pad (not shown) fixed to the frame 4, a skin 6 that covers the pad, and a frame cover 8 that covers a lower portion of the frame 4. The frame 4 is formed of a highly rigid material such as a steel material or a hard synthetic resin.

  The epidermis 6 is formed by a first epidermis 6a and a second epidermis 6b. The first skin 6a has a shape including at least a portion with which the buttocks contact when a seated person is seated, and is formed to have substantially the same shape as the upper surface of the pad. The second skin 6b is a side part that covers at least the front side part and the left and right side parts of the pad, a joint part that is sewn together with the first skin 6a, and a connection that is bent inward from the front side part and the left and right side parts. A section.

  The terminal of the first skin 6a and the connection portion of the second skin 6b are connected by being sewn together with a sewing thread at a seam 6c that is a joint portion. The seam 6c is sewn so as to be inside the first and second skins so that it does not appear on the outside aesthetically. The seam 6 c is located near the top (ridgeline) of the seat cushion 2.

  The first skin 6a is formed of leather, leather, synthetic leather, cloth, an equivalent thereof, or a member that combines them. The second skin 6b is formed of a soft material such as an elastomer, a soft resin, a formed non-woven fabric, an equivalent thereof, or a material combining them. The elastomer is a rubber-like and elastic industrial material, and for example, an olefin-based thermoplastic elastomer is used. The frame cover 8 is formed by a resin molding process using a synthetic resin as a material.

  The seat back 3 includes a pipe frame 11 having a skeleton structure, a back board 12 supported by the pipe frame 11, pads 5b fixed to the back board 12, and a skin 13 covering the pads 5b. The pipe frame 11 is swingably connected to the frame 4 on the seat cushion 2 side by a reclining mechanism (not shown). The pipe frame 11 is made of steel. The backboard 12 is formed of a hard synthetic resin. The pad 5b is a member that imparts cushioning properties to the seated person, and is formed of, for example, foaming resin and urethane.

  The epidermis 13 is formed by a first epidermis 13a and a second epidermis 13b. The second skin 13b is provided separately on both the left and right sides with the first skin 13a interposed therebetween. The terminal portion of the first skin 13a and the connection portion of the second skin 13b are connected by stitching with a sewing thread at a seam 13c that is a joint portion. The seam 13c is sewn so as to be inside the first and second epidermis so as not to appear on the outer side in appearance.

  The first skin 13a is formed of leather, leather, synthetic leather, cloth, an equivalent thereof, or a member combining them. The second skin 13b is formed of a soft material such as an elastomer, a soft resin, a formed nonwoven fabric, an equivalent thereof, or a material combining them. Thereby, the 1st skin 13a and the 2nd skin 13b can be stitched together with a sewing machine etc.

  FIG. 5 is a perspective view showing a state in which the seat back of FIG. 1 is viewed from the back side. FIG. 6 is an enlarged view of a portion B in FIG. FIG. 7 is a perspective view of the seat back of FIG. FIG. 8 is a perspective view of the second skin of FIG. 5 to 8 also show horizontal sectional views of the backboard 12 and the skin 13b.

  As shown in FIG. 5, the second skin 13 b is separated on the left and right sides at the upper and lower portions of the backboard 12.

  As shown in FIG. 7, at the peripheral portion of the back surface of the backboard 12, a first folded portion 12aa folded back to the inside, a second folded portion 12ab folded outward from the first folded portion 12aa, and a second And a third folded portion 12ac that is folded outward from the folded portion 12ab. Thereby, the folding | turning 12a which has a U-shaped groove | channel by horizontal cross sectional view is formed.

  As shown in FIG. 8, the second skin 13b has a first folded portion 13db folded inward at the end 13da opposite to the seam 13c, and a second folded back further inside from the first folded portion 13db. And a folded portion 13dc. Thereby, the folding | returning part 13d which has a U-shaped groove | channel by horizontal cross sectional view is formed. The first folded portion 13db and the second folded portion 13dc are integrally formed with the second skin 13b simultaneously by the same material when the second skin 13b is manufactured by molding.

  The surface 13 of the integrated structure of the backboard 12 and the pad 5b is covered with an outer skin 13, and the second folded portion 13dc of the folded portion 13d, which is a convex portion, is further connected to the folded portion 12a of the backboard 12 as shown in FIG. The folded portion 13d and the folded portion 12a are fitted with each other by being inserted into the groove with a predetermined pressing force. Since the folded section 12a and the folded section 13d have the same cross section formed continuously along the outer circumferential direction, the skin 13 can be fitted while adjusting the position along the outer circumferential direction. By this fitting, the skin 13 is attached in close contact with the surface of the integrated structure of the backboard 12 and the pad 5b, and the vehicle seat 1 is completed. In this embodiment, the connection structure for connecting the backboard 12 as the base and the second skin 13b is provided on the folded portion 13d provided on the second skin 13b and the backboard 12 as the base. The folded portion 12a is formed.

FIG. 9 is an enlarged view of a portion D in FIG.
A knob portion 16b, which is a protruding member, is provided on the first folded portion 13db of the portion of the second skin 13b located on the upper portion of the backboard 12. The knob portion 16b is formed integrally with the second skin 53b at the same time by the same material when the second skin 13b is manufactured by molding.

  At the time of removal, when the knob portion 16b is pulled outward (in the direction opposite to the backboard 12), the folded portion 13d can be detached from the folded portion 12a and removed. Since the left and right first folded portions 13db are not connected and the end portion of the first folded portion 13db is located on the backboard 12, and it is possible to trigger the removal, the knob portion 16b Is not necessary.

FIG. 10 is a perspective view of the seat cushion of FIG. 11 is a cross-sectional view taken along the line KK of FIG. FIG. 11 shows the left half as seen from the seated person. Line LL ′ is a line passing through the center of the left and right sides of the seat cushion 2 and extends in the vertical direction.
As shown in FIG. 11, the seat cushion 2 includes a connection structure similar to the connection structure of the seat back 3 described above. That is, a folded portion 6d similar to the folded portion 13d shown in FIG. 8 is provided at the peripheral portion of the second skin 6b forming the skin 6. On the other hand, a folded portion 4a similar to the folded portion 12a shown in FIG. A knob portion similar to the knob portion 16b is provided at the first folded portion of the portion of the second skin 6b located at the front portion of the frame 4. Then, the second skin 6b and the frame 4 are connected by inserting the folded portion 6d on the second skin 6b side into the folded portion 4a on the frame 4 side as a base material. The seam 6c is located in the vicinity of the top (ridgeline) of the seat cushion 2 (pad 5a), and the second skin 6b is located at a position where it can be seen from above (the seated person side). The second skin 6b and the seam 6c are also located at the front portion of the seat cushion 2. Therefore, the second skin 6 b covers the corner portion between the front portion and the side portion of the seat cushion 2. Most of the second skin 6b (including the folded portion 6d) is located on the side of the seam 6c, and the second skin 6b has a curved shape that protrudes outward in a cross-sectional view.

  In the embodiment, a U-shaped cross-sectional groove formed on a base body such as a back frame and a U-shaped cross-sectional groove formed on an attachment member such as a skin are fitted. Since the same cross section is continuously formed along the outer circumferential direction, the fitting portion of the base body and the mounting member can be fitted while adjusting the position along the outer circumferential direction. As a result, it is possible to reduce pattern deviation (horizontal / vertical does not appear, etc.) due to variations in the sewing of the skin, wrinkles due to biased tension, and the like.

  The strength of the fitting between the base and the mounting member can be set arbitrarily by providing ribs and protrusions at appropriate intervals on the base, or by forming a corrugation in the cross-sectional shape of the mounting member or arranging the ribs. It can be set to strength.

  In addition, by forming the knob portion on the attachment member, the attachment member can be peeled off and can be applied to the dressing cover.

  When a soft material is used for the epidermis, depending on conditions such as shape and thickness, there is a possibility that the deflection characteristics of the pad to be included may be hindered or a foreign object may be felt when seated. As shown in FIG. 3, the second skin 13b is provided with a relief-like slit (groove) in a part thereof (a portion of a broken line ellipse B). Each groove has a concave portion on the front side of the second skin 13b and a convex portion on the back side. The thickness of the concavo-convex portion of the groove of the second skin 13b is thinner than the periphery. As a result, the slits (grooves) formed in the second skin 13b are more crushed when loaded (FIG. 4) than when not loaded (FIG. 3), thereby ensuring sufficient followability of the pad's original deflection. be able to. In this way, if you want to give flexibility (elongation and deflection) to the skin using a soft material, you can give flexibility (elongation and deflection) freely regardless of location or range by devising the cross section and thickness. be able to. The end portion of the second skin 13b on the first skin 13a side is located on the first skin 13a side of the top portion (ridge line) of the seat back 3 (pad 5b), and the seam 13c is on the top portion (ridge line). Located in the vicinity, the second skin 13b is located at a location where it can be seen from the front (the seated person side). Most of the second skin 13b (including the folded portion 13d) is located on the side of the seam 13c, and the second skin 13b is curved outwardly in a sectional view.

  FIG. 12 is a perspective view of the vehicle seat according to the embodiment. Dashed lines E, F, G, and H are locations where the curvature of the seam portion between the first skin and the second skin is large. The broken line part E is a side support part of the seat back 3, the broken line part F is a corner part between the side part and the front part of the seat cushion 2, and the broken line part G is between the side part and the rear part of the seat cushion 2. The broken line portion H is near the connection between the seat cushion 2 and the seat back 3. Hereinafter, although the terminal of the 1st skin of the broken line part E and the terminal of the 2nd skin is explained, the broken line parts F, G, and H are the same.

  FIG. 13 is a plan view for explaining the terminal portion of the first skin according to the comparative example of the portion corresponding to the broken line portion E of FIG. When sewing the fabrics of the first skin 13aR and the second skin 13bR, it was considered to provide V-shaped notches and V-shaped projections as alignment marks at the respective fabric terminals. The first skin 13aR includes a V-shaped notch NTVa and a V-shaped projection PRV at the end of the curved portion. Although not shown, the end of the curved portion of the second skin 13bR also has a V-shaped notch at a location corresponding to the V-shaped notch NTVa of the first skin 13aR. In order to sew a plurality of fabrics as planned, this is used as a mark for each important point. Further, the V-shaped notch reduces the accumulation of the sewing allowance at the sewing portion of the curved portion. As a result, helix lines and stitch lines are suppressed, and the appearance quality is good.

  However, in the case of the second skin formed of a soft resin molded product or the like, it is difficult to set the V-shaped notch because there is a concern that the second skin is damaged (broken) from the tip of the corner of the V-shaped notch.

  FIG. 14 is a perspective view for explaining sewing of the first skin and the second skin according to the comparative example. FIG. 14 shows a state in which the second skin 13bR is overlaid on the first skin 13aR. The first skin 13aR has a V-shaped notch NTVa at the end of the curved portion. The second skin 13bR has a V-shaped notch NTVb and a V-shaped projection PRV at the end of the curved portion. The sewing machine guide steel MG is for maintaining a constant distance between the sewing line SL (needle ND) and the skin terminal, and is sewn while the skin terminal is in contact with the sewing machine guide steel. However, if there is a V-shaped projection PRV, the V-shaped projection PRV contacts the sewing machine guide steel MG and the sewing line is disturbed. In addition, since the fabric of the second skin 13bR is a soft resin molding and does not have the flexibility and stretchability of the fabric of the first skin 13aR, when a plurality of fabrics are stitched in the curve direction, a seam allowance is accumulated. Can become an unintended sewing line.

  FIG. 15 is a plan view for explaining the terminal portions of the first skin and the second skin according to the embodiment corresponding to the broken line portion E of FIG. The first skin 13a has a curved portion that protrudes outward, and a plurality of notches (slits) NTa having no corners (the tip is rounded in plan view) are provided at the ends of the curved portion. For example, each of the plurality of notches NTa has a semicircular shape or a semi-elliptical shape and the same shape and the same size. The second skin 13b has a concave curved portion inside, and a plurality of notches (slits) NTb having no corners (the tip is rounded in plan view) are provided at the ends of the curved portion. Each of the plurality of notches NTb has a semicircular shape or a semielliptical shape and the same shape and the same size. When the first skin 13a and the second skin 13b are overlapped, each of the plurality of notches NTa is arranged at a position overlapping each of the plurality of notches NTb. By making the shape of the notch NTb into a curved shape having no corners such as a semicircular shape or a semi-elliptical shape, it is possible to reduce damage (tearing) of the second skin 13b from the notch NTb. In addition, a sewing mark can be provided on the second skin 13b. Further, it is possible to reduce the accumulation of the seam allowance of the second skin 13b.

  16A to 16C are diagrams for explaining a stitching procedure of the first skin and the second skin according to the embodiment. For easy understanding, the end of the epidermis is not a curve but a straight line. FIG. 16A is a diagram corresponding to the state of FIG. As shown in FIG. 16B, the second skin 13b is turned over and overlaid on the skin 13a, and the seam 13c is sewn with the sewing thread ST while the notches NTa and NTb are aligned. As shown in FIG. 16C, after finishing the sewing, the second skin 13b is turned over again.

  FIG. 17 is a plan view for explaining the terminal portions of the first skin and the second skin according to Modification 1 of the portion corresponding to the broken line portion E of FIG. The first skin 13aA has a curved portion protruding outward, and a plurality of semi-elliptical notches (slits) NTaA are provided at the ends of the curved portion. The plurality of notches NTaA have the same shape but different sizes. The notch at the center (convex apex) of the curved portion is large and decreases as the distance from the center increases. The second skin 13bA has a concave curved portion inside, and a plurality of semi-elliptical notches (slits) NTbA are provided at the end of the curved portion. The plurality of notches NTbA have the same shape but different sizes. The notch at the center of the curved portion (concave valley bottom) is large and decreases as the distance from the center increases.

  FIG. 18 is a plan view for explaining the first skin and the terminal portion of the second skin according to the modified example 2 of the portion corresponding to the broken line portion E of FIG. The first skin 13aB has a curved portion protruding outward, and a plurality of semicircular notches (slits) NTaB are provided at the ends of the curved portion. The plurality of notches NTaB have the same shape but different sizes. The notch at the center (convex apex) of the curved portion is large and decreases as the distance from the center increases. The second skin 13bB has a concave curved portion inside, and a plurality of semicircular notches (slits) NTbB are provided at the end of the curved portion. The plurality of notches NTbB have the same shape but different sizes. The notch at the center of the curved portion (concave valley bottom) is large and decreases as the distance from the center increases.

  FIG. 19 is a plan view for explaining a sewing line and a seam allowance for the first skin and the second skin according to the second modification. 20 is a cross-sectional view corresponding to the line M-M ′ after stitching the skin of FIG. 19. The distance (sewing margin SM) from the terminal to the inner sewing line (broken line) SLA is, for example, 10 mm. The distance from the terminal to the outer line (line intersecting the notch) SLB (two-dot broken line) is 7 mm. In other words, the seam allowance is preferably 7 mm to 10 mm. Although the sewing line and the seam allowance of the first skin and the second skin according to Modification 2 have been described, the same applies to the Examples, Modification 1 and Modification 3 described later. Usually, the seam allowance is 8 mm to 10 mm. Further, in a skin (for example, in the vicinity of a headrest / buckle) where small curved portions are continuous, a seam allowance is 5 mm. When the seam allowance is 5 mm, the seam allowance does not induce meandering of the sewing line.

  FIG. 21 is a plan view for explaining the terminal portions of the first skin and the second skin according to Modification 3 of the portion corresponding to the broken line portion E of FIG. The first skin 13aC has a convex curve portion on the outside, and a plurality of semicircular notches (slits) NTaC are placed at the ends of the curve portion at the center (OO ′ line, convex vertex) of the curve portion. It is preferable to provide it separately. The second skin 13bC has a concave curved portion on the inner side, and a plurality of semicircular notches (slits) NTbC are preferably provided at the end of the curved portion with the center (concave valley bottom) of the curved portion removed. . It is more preferable to set a distance in the range N from the O-O ′ line, for example, a distance of about 10 to 30 mm.

  As mentioned above, the invention made by the present inventor has been specifically described based on the embodiments, examples, and modifications. However, the present invention is not limited to the above-described embodiments, examples, and modifications, and various modifications can be made. It goes without saying that it is possible.

  For example, in the embodiment, the base body to which the skin 13 is attached is formed by the backboard 12 supported by the pipe frame 11. However, instead of this, the pipe frame 11 itself can be used as a base. Further, the base body can be constituted by a backboard that functions as a frame having a skeleton structure without being supported by the pipe frame 11.

  Further, in the embodiment, the skin of the seat back and the skin of the seat cushion are separate members, but they may be formed as one body. In this case, the first epidermis 6a and 13a are formed integrally or stitched together so that the second epidermis 6b and the second epidermis 13b are separated from each other. This is preferable for improving the assembly property.

  In the embodiment and the modification, the notch is formed in a semicircular shape or a semi-elliptical shape, but may be formed in a U shape.

DESCRIPTION OF SYMBOLS 1 ... Vehicle seat 2 ... Seat cushion 3 ... Seat back 4 ... Frame 5a, 5b ... Pad 6 ... Skin 6a ... 1st skin 6b ... 2nd Skin 6c ... seam 8 ... frame cover 11 ... pipe frame 12 ... backboard 12a ... folded portion 13 ... skin 13a ... first skin 13b ... second Skin 13c ... seam 13d ... folded portion NTa ... notch NTb ... notch SLA ... sewing line SM ... sewing allowance ST ... sewing thread

Claims (10)

The vehicle seat
The epidermis,
A substrate to which the skin is attached;
A pad disposed between the skin and the substrate;
With
The epidermis is
A first skin having a plurality of first notches at the terminal;
A second skin formed of a soft material and having a plurality of second notches at its ends;
A thread for overlapping the plurality of first notches and the plurality of second notches to sew the first skin and the second skin;
With
The plurality of first notches are located at a curved terminal protruding outward from the first skin,
The plurality of second notches are located on a curved end that is concave to the inside of the second skin;
The ends of the plurality of first notches and the second notches are rounded in plan view. The vehicle seat according to claim 1,
Each of the plurality of first notches and the second notches has a semicircular shape or a semielliptical shape in plan view. The vehicle seat according to claim 1,
The plurality of first notches have different sizes,
Some of the plurality of second notches have different sizes. In the vehicle seat according to claim 3,
The size of the plurality of first notches is large in the vicinity of the convex vertex, and decreases as the distance from the vertex increases.
The size of the plurality of second notches is large in the vicinity of the concave valley bottom, and decreases as the distance from the valley bottom increases. The vehicle seat according to claim 1,
The plurality of first notches are located away from the convex vertex,
The plurality of second notches are located away from the concave valley bottom. The vehicle seat according to claim 5, wherein
The location outside the concave valley bottom is within the range of 10 to 30 mm from the valley bottom. The vehicle seat according to claim 1,
The seam allowance of the first skin provided with the plurality of first notches is 7 to 10 mm,
The seam allowance of the second skin provided with the plurality of second notches is 7 to 10 mm. The vehicle seat according to claim 1,
The soft material is an elastomer, a soft resin, a molding ignorant cloth, an equivalent thereof, or a combination thereof. The vehicle seat according to claim 1,
The substrate is
Backboard supported by the seatback frame, or
A backboard that itself functions as a frame,
And
The plurality of first and second notches are located in a side support portion of the seat back. The vehicle seat according to claim 1,
The base is a frame of a seat cushion;
The plurality of first and second notches are located in the vicinity of a corner portion between a side portion and a front portion of the seat cushion.

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