Seat cover fixing structure

Abstract

To provide a seat cover fixing structure which can fix a cover end of a seat cover to a seat pad while a degree of freedom of a pad shape is secured.SOLUTION: A seat cover fixing structure 1 fixing a cover end 12A of a seat cover to a pad rear face of a seat pad 11 comprises: a planar cover side surface material 2 which is to be a draw-in part drawing in along a pad rear face of the cover end 12A; and planar pad side surface material 3 including a sewing part 3B stitched to form a free end part 3C a part of which can be rolled up with respect to a rear surface material 11A integrally formed along the pad rear face of the seat pad 11, and a through hole 3A (stationary portion) arranged in the free end part 3C which can fix the cover side surface material 2 against tension caused by drawing in the cover side surface material.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a seat cover fixing structure, and more particularly to a seat cover fixing structure for fixing a cover terminal of a seat cover to a back surface of a seat pad. [Background technology]

[0002] Patent Document 1 discloses a structure for pulling and fixing the cover end of the seat cover to the back side of the seat pad. Specifically, the seat cover is fixed to the back side of the seat pad by pressing and connecting a female hook and loop fastener sewn to the end of the seat cover to a male hook and loop fastener integrally molded on the back side of the seat pad. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-41011 Summary of the Invention [Problem to be solved by the invention]

[0004] In the above-mentioned conventional technology, a flat surface must be secured on the back surface of the seat pad to set the hook-and-loop fastener, which tends to impair the freedom of shape. Therefore, the present invention provides a seat cover fixing structure that can fix the cover terminal of the seat cover to the seat pad while ensuring the freedom of pad shape. [Means for solving the problem]

[0005] As a means for solving the above problems, the seat cover fixing structure of the present invention employs the following means.

[0006] That is, the first invention of the present invention is a seat cover fixing structure for fixing a cover terminal of a seat cover to the pad back surface of a seat pad, comprising: a planar cover side material forming a retraction portion that is retracted along the pad back surface of the cover terminal; a sewing portion that is sewn to a back material that is integrally molded along the pad back surface of the seat pad to form a free end portion that can be rolled up in part; and a planar pad side material having a fixing portion provided at the free end portion that can be fixed against the tension caused by retraction of the cover side material.

[0007] According to the first aspect of the present invention, the side surface of the pad, which can be fixed to the back surface of the seat pad, is sewn to form a free end that can be rolled up, thereby reducing the mounting space required for the side surface of the pad to the back surface of the seat pad. As a result, the cover terminal of the seat cover can be appropriately fixed to the back surface of the seat pad while appropriately ensuring the degree of freedom of the pad shape of the seat pad.

[0008] A second invention of the present invention is a seat cover fixing structure according to the first invention, wherein the fixing portion is a through hole formed so as to penetrate the pad side material in a direction perpendicular to the surface, and the fixed portion fixed to the through hole of the cover side material is a hanging portion which is fixed to the through hole against the tension by being hooked onto the through hole.

[0009] According to the second invention, by forming the fixing portion on the pad side material as a through hole, even if the foamed resin material gets into the through hole due to integral molding with the seat pad, the part blocking the through hole can be easily removed after molding to allow the through hole to function properly. In other words, unlike a hook-and-loop fastener, whose function is easily impaired by the foamed resin material getting into it, the fixing portion can be configured to be less prone to problems caused by integral molding.

[0010] The third invention of the present invention is a seat cover fixing structure according to the second invention, wherein the through hole is shaped like a slit that extends in an elongated manner in the direction in which the tension acts when the hanging portion is fixed, and the hanging portion is shaped like a rod that extends in an elongated manner in a direction perpendicular to the direction in which the tension acts when the hanging portion is fixed to the through hole, and the hanging portion has a maximum diameter of a cross section that is shorter than the hole length of the through hole and a rod length that is longer than the hole length.

[0011] According to the third aspect of the present invention, the rod-shaped hanging part can be easily passed through the slit-shaped through-hole by passing the cross section having the maximum diameter shorter than the hole length in the longitudinal direction. Furthermore, after passing through, the rod-shaped hanging part is provided on the pad side material so as to extend in a direction perpendicular to the through-hole extending in the direction of tension, so that the hanging part is unlikely to come out of the through-hole.

[0012] A fourth invention of the present invention is a seat cover fixing structure according to any one of the first to third inventions, wherein the stitching portion of the pad side material is sewn to the back material so that a stitching line extends in a direction perpendicular to the direction in which the tension acts.

[0013] According to the fourth aspect of the present invention, the pad side surface materials can be provided so as to exhibit high tensile strength relative to the back surface material. [Brief description of the drawings]

[0014] [Figure 1] 1 is a perspective view illustrating a schematic configuration of a seat cover fixing structure according to a first embodiment. [Diagram 2] 1 is a perspective view showing a state before the cover side material is fixed to the pad side material. FIG. [Diagram 3] 13 is a perspective view showing the state in which the cover side material is fixed to the pad side material. FIG. [Figure 4] FIG. 4 is a bottom view of FIG. 3. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0016] First Embodiment (Schematic configuration of seat cover fixing structure 1) First, the configuration of a seat cover fastening structure 1 according to a first embodiment of the present invention will be described with reference to Figures 1 to 4. In the following description, when directions such as front, back, up, down, left and right are indicated, they refer to the respective directions shown in each figure. In addition, in the following description, when a specific reference figure is not indicated or when there is no reference number corresponding to a reference figure, any of Figures 1 to 4 will be appropriately referred to.

[0017] As shown in Fig. 1, a seat cover fixing structure 1 according to this embodiment is applied to a seat cushion 10 that constitutes the seating portion of an automobile seat. Fig. 1 is a perspective view showing an enlarged view of a part of the seat cushion 10 from the back side of the seat. The seat cushion 10 has a seat frame (not shown) that forms the framework of the seat cushion 10, a seat pad 11 that covers the seat frame from above, and a seat cover 12 that covers the seat pad 11 from the surface side of the pad.

[0018] The seat pad 11 is made of a polyurethane foam molded body. The seat pad 11 is configured such that a back surface material 11A made of nonwoven fabric is integrally molded along the back surface of the pad. The back surface material 11A is set in a mold for the seat pad 11, and the foaming resin raw material of the seat pad 11 is foamed and molded in the mold, so that the back surface material 11A is integrally bonded along the back surface of the seat pad 11.

[0019] The seat cover 12 is made of a planar member made of fabric. The seat cover 12 is placed over the seat pad 11 from the front surface side. The front, rear, left and right peripheral edges of the seat cover 12 are pulled into and fixed to the rear side of the seat pad 11. As a result, the seat cover 12 is stretched widely over the surface of the seat pad 11.

[0020] In addition, as the seat cover 12 is retracted, it rolls up a seat frame (not shown) that supports the back of the seat pad 11, and presses the seat pad 11 against the seat frame. As a result, the seat cover 12 fixes the position of the seat pad 11 to the seat frame as it is retracted.

[0021] Of the peripheral portions of the seat cover 12, a cover terminal 12A that is a part of the peripheral portion on the rear side of the seat cover 12 is pulled from rear to front along the pad rear surface of the seat pad 11 and fixed to a back surface material 11A on the pad rear surface by the seat cover fixing structure 1. As shown in Figs. 2 and 3, the seat cover fixing structure 1 is composed of a strip-shaped cover side material 2 that is sewn to the cover terminal 12A and pulled along the pad rear surface, and a strip-shaped pad side material 3 that is sewn to the back surface material 11A of the seat pad 11 to fix the cover side material 2.

[0022] As shown in Fig. 2, a flat rod-shaped resin plate 2A extending in a direction perpendicular to the obi length direction is sewn to the tip of the cover side material 2 in the obi length direction, which is the retraction direction. As shown in Fig. 3, the resin plate 2A functions as a hanging part that is passed through and hooked onto a through hole 3A formed in the pad side material 3. Here, the resin plate 2A corresponds to the "fixed part" and "hanging part" of the present invention. Also, the through hole 3A corresponds to the "fixing part" of the present invention.

[0023] As shown in Fig. 2, the cover side material 2 is composed of a single belt-shaped member. Specifically, the cover side material 2 has a retractable strap portion 2B that extends in the strap length direction from the sewing point with the cover end 12A with a substantially constant strap width, and a plate attachment portion 2C that widens the strap width at the tip end in the strap length direction of the retractable strap portion 2B. The plate attachment portion 2C is configured to widen the strap width in a trapezoidal shape via an expanding portion 2D that diagonally widens the strap width from the retractable strap portion 2B.

[0024] The above-mentioned resin plate 2A is sewn to the plate attachment portion 2C. The resin plate 2A has a rod length L that is approximately the same as the band width of the plate attachment portion 2C. The resin plate 2A is sewn to the plate attachment portion 2C over approximately the entire area in the band width direction. The resin plate 2A has a flat rod shape with a rectangular cross section.

[0025] The resin plate 2A has a side surface forming the long side of its cross section abutted against and sewn to the plate attachment portion 2C of the cover side material 2. The resin plate 2A has a maximum diameter φ2 of its cross section (i.e., the length of the long side) shorter than the hole length φ1 of the through hole 3A of the pad side material 3.

[0026] A slit-like through hole 3A extending thinly in the length direction is formed in the center of the width direction of the strip of the pad side material 3. The through hole 3A is formed in the middle part of the pad side material 3, leaving both ends in the length direction. Circular expansion holes A1 are formed at both ends of the through hole 3A to prevent breakage due to stress concentration.

[0027] One end of the pad side material 3 in the band length direction is sewn to the back surface material 11A of the seat pad 11 (sewn portion 3B). The sewn portion 3B is sewn over the entire area in the band width direction so that a stitch line extends in the band width direction of the pad side material 3. This allows the pad side material 3 to bend so that the portion extending in the band length direction from the sewn portion 3B becomes a free end portion 3C and is rolled up from the back surface material 11A. The aforementioned through hole 3A is formed in the free end portion 3C away from the sewn portion 3B. The free end portion 3C extends rearward from the sewn portion 3B, i.e., in the direction in which the cover side material 2 is drawn in.

[0028] The pad side material 3 is sewn to the back surface material 11A at a stage before the back surface material 11A is integrally molded with the seat pad 11. The pad side material 3 is set together with the back surface material 11A in a mold for the seat pad 11 and is integrally molded with the seat pad 11. At this time, the pad side material 3 is sewn to the surface of the back surface material 11A opposite to the surface that is integrally molded with the seat pad 11, so that the foaming resin raw material is basically unlikely to get around.

[0029] More specifically, the pad side material 3 is sewn not to the edge of the back surface material 11A but to a middle part away from the edge, so that the foaming resin raw material is basically less likely to get in. However, even if the foaming resin raw material gets in and blocks the through-hole 3A during the above molding, the pad side material 3 is designed so that the part blocking the through-hole 3A can be easily removed after molding.

[0030] That is, since the pad side material 3 has the through-hole 3A as a functional part for fixing the cover side material 2, it can be easily made usable by simply removing the part blocking the through-hole 3A after molding, compared to a structure such as a hook-and-loop fastener that is easily clogged with the foamed resin raw material. Therefore, it is possible to easily mold the pad side material 3 integrally with the seat pad 11 without providing a separate member such as a masking member to prevent the foamed resin raw material from getting around.

[0031] The pad side material 3 is made of a planar member made of polyester canvas. This makes the pad side material 3 less likely to bend or deform due to heat even when heated during integral molding with the seat pad 11. Therefore, the pad side material 3 can properly maintain the state in which it is sewn to extend along the back surface material 11A even when it is subjected to integral molding with the seat pad 11.

[0032] The cover side material 2 is fixed to the pad side material 3 with a resin plate 2A passing through the through hole 3A as follows. As shown in Fig. 2, first, the pad side material 3 is rolled up from the back surface material 11A, and the through hole 3A is pulled away from the back surface material 11A. Next, while pulling the cover side material 2 toward the pad side material 3 in the strip length direction, the resin plate 2A is passed through the through hole 3A from the back side of the pad side material 3, i.e., from the side facing the back surface material 11A.

[0033] Specifically, first, the resin plate 2A is twisted vertically so that it can be passed through the through hole 3A in the longitudinal direction. Next, the resin plate 2A is passed through the through hole 3A together with the plate attachment portion 2C. As a result, as shown in Figs. 3 and 4, the resin plate 2A is returned to a horizontal state by the restoring force of the plate attachment portion 2C at the position where it has passed through the through hole 3A.

[0034] Thereafter, the retracting force applied to the cover side material 2 is released. As a result, the resin plate 2A is hooked so as to abut against the surface of the pad side material 3 without coming out of the through-hole 3A due to the action of tension against the retraction of the cover side material 2. This hooking fixes the cover side material 2 to the pad side material 3 against the tension caused by the retraction.

[0035] The resin plate 2A is passed through the through hole 3A from the back side of the pad side material 3, i.e., the side facing the back material 11A. As a result, the resin plate 2A is passed through the front side of the pad side material 3, i.e., the side not facing the back material 11A (the side visible from the outside). Therefore, an operator can visually check whether the resin plate 2A is properly passed through the through hole 3A. Furthermore, since the resin plate 2A is in a position that is easier to see and to grasp with the hand than when the resin plate 2A is passed through the back side of the back material 11A, the operation of removing the resin plate 2A from the through hole 3A can be easily performed.

[0036] The resin plate 2A has a rod length L longer than the hole length φ1 of the slit-shaped through hole 3A. Therefore, after the resin plate 2A is inserted into the through hole 3A, it is difficult to remove the resin plate 2A from the through hole 3A even when the resin plate 2A is rotated to extend in the same direction as the through hole 3A, not to mention when the resin plate 2A is oriented perpendicular to the direction in which the through hole 3A extends. In other words, the resin plate 2A is configured to be easily inserted into the through hole 3A but difficult to remove.

[0037] To sum up, the seat cover fastening structure 1 according to this embodiment is configured as follows: In the following, the reference characters in parentheses correspond to the respective components shown in the above embodiment.

[0038] That is, the seat cover fixing structure (1) for fixing the cover end (12A) of the seat cover (12) to the pad back surface of the seat pad (11) has a planar cover side material (2) forming a retraction portion that is retracted along the pad back surface of the cover end (12A), a sewn portion (3B) that is sewn to the back surface material (11A) that is integrally molded along the pad back surface of the seat pad (11) to form a free end portion (3C) that can be partially rolled up, and a planar pad side material (3) that has a fixing portion (3A) provided at the free end portion (3C) that can fix the cover side material (2) against the tension caused by retraction.

[0039] In this way, by sewing the pad side material (3) capable of fixing the cover end (12A) to the back surface material (11A) of the seat pad (11) so as to form a free end portion (3C) that can be rolled up, it is possible to reduce the mounting space for the pad side material (3) relative to the back surface material (11A). As a result, it is possible to appropriately fix the cover end (12A) of the seat cover (12) to the pad back surface of the seat pad (11) while appropriately ensuring the degree of freedom of the pad shape of the seat pad (11).

[0040] The fixing portion (3A) is a through hole (3A) formed so as to penetrate the pad side material (3) in a direction perpendicular to the surface. The fixed portion (2A) fixed to the through hole (3A) of the cover side material (2) is a hanging portion (2A) that is hooked onto the through hole (3A) and fixed to the through hole (3A) against tension.

[0041] In this way, by forming the fixing portion (3A) on the pad side material (3) as a through hole (3A), even if the foamed resin material gets into the through hole (3A) due to integral molding with the seat pad (11), the part blocking the through hole (3A) after molding can be easily removed to allow the through hole (3A) to function properly. In other words, unlike a configuration in which the function is easily impaired by the foamed resin material getting into the fixing portion (3A) like a hook-and-loop fastener, the fixing portion (3A) can be configured to be less prone to defects due to integral molding.

[0042] In addition, the through hole (3A) is shaped like a slit that extends thinly in the direction in which tension acts when the hanging portion (2A) is fixed. The hanging portion (2A) is shaped like a rod that extends thinly in a direction perpendicular to the direction in which tension acts when the hanging portion (2A) is fixed to the through hole (3A), and has a maximum diameter (φ2) of a cross section that is shorter than the hole length (φ1) of the through hole (3A) and a rod length (L) that is longer than the hole length (φ1).

[0043] According to the above-mentioned configuration, the rod-shaped hanging portion (2A) can be easily passed through the slit-shaped through-hole (3A) by passing the cross section having a maximum diameter (φ2) shorter than the hole length (φ1) in the longitudinal direction. Furthermore, after passing through, the rod-shaped hanging portion (2A) is provided on the pad side material (3) so as to extend in a direction perpendicular to the through-hole (3A) extending in the direction in which the tension acts, so that the hanging portion (2A) is unlikely to come out of the through-hole (3A).

[0044] In addition, the seam (3B) of the pad side material (3) is sewn to the back surface material (11A) so that the seam line extends in a direction perpendicular to the direction in which tension acts. According to the above configuration, the pad side material (3) can be provided so as to exhibit high tensile strength with respect to the back surface material (11A).

[0045] Other embodiments Although one embodiment of the present invention has been described above, the present invention can be embodied in various forms other than the above embodiment.

[0046] 1. The seat cover fastening structure of the present invention may be applied to seats for vehicles other than automobiles, such as trains, as well as seats for vehicles other than vehicles, such as airplanes and ships. The seat cover fastening structure may also be applied to seats other than vehicles, such as seats installed in various facilities, such as sports facilities, theaters, concert halls, and event halls, and massage seats. The seat cover fastening structure may also be applied to seat cushions and seat backs.

[0047] 2. The cover side material, i.e., the surface material forming the retracted portion that is retracted along the back surface of the pad at the cover end, may be made of the cover end itself, in addition to the surface material sewn to the cover end. The cover side material and the pad side material may be made of polyester canvas, carpet material, other fabric material, or leather material. The cover side material and the pad side material may be made of the same material or different materials.

[0048] 3. The combination of the fixing part provided on the pad side material and the fixed part provided on the cover side material is not limited to a specific combination. For example, a through hole (fixed part) may be provided on the cover side material, and a hanging part (fixing part) that is hooked to the through hole against tension by being hooked to the through hole may be provided on the pad side material. The hanging part may be a rod-shaped member such as the resin plate shown in the above embodiment, or may be a hanging button such as a round button that is passed through the through hole and hooked to the through hole, or a hooking tool such as a J hook that has a hook part at the tip that is hooked to the through hole.

[0049] Furthermore, the combination of the fixing part and the fixed part is not limited to the combination of a through hole and a hook part, but may be a combination of a male hook fastener and a female hook fastener. The through hole is not limited to a slit-shaped hole, but may be a so-called potbelly hole in which a large diameter hole for passing the hook part and a small diameter hole for hanging the passed hook part are arranged side by side.

[0050] 4. The stitching portion of the side pad material to the back pad material may be sewn to form a free end portion that can be rolled up, and may be sewn along one side of the side pad material, or may be sewn along two or three adjacent sides. Also, as long as the stitching portion is sewn to form a free end portion that can be rolled up, the stitching line does not have to be open with an end, and may be closed in an endless shape (loop shape). Also, the stitching portion is not limited to the edge of the side pad material, and may be sewn to the back pad material at a middle portion away from the edge.

[0051] The free end of the pad side material may be provided so as to extend in the direction in which the cover side material is drawn in from the stitching, or it may be provided so as to extend in the opposite direction to the direction in which the cover side material is drawn in. The free end of the pad side material may also extend in other directions, and for example, when the fixing part is a slit-shaped through hole, the tension caused by the hook part of the cover side material being hooked into the through hole may cause the pad side material to twist in a direction that extends elongatedly through the through hole with the stitching as a fulcrum in the direction in which the tension acts. [Explanation of symbols]

[0052] 1 Seat cover fixing structure 2 Cover side material 2A Resin plate (fixed part, hook part) 2B Retractable belt section 2C Plate mounting part 2D enlarged diameter section 3 Pad side material 3A Through hole (fixed part) A1 expansion hole 3B Suture section 3C Free end 10 Seat cushion 11 Seat pad 11A Back material 12 Seat Covers 12A Cover Terminal φ1 hole length φ2 Maximum diameter L Rod length

Claims

1. A seat cover fixing structure for fixing a cover end of a seat cover to a back surface of a seat pad, A planar cover side member forming a retraction portion that is retracted along the back surface of the pad of the cover terminal; A seat cover fixing structure having: a sewing portion that is sewn to a backing material that is integrally molded along the back surface of the pad of the seat pad to form a free end portion that can be rolled up in part; and a planar pad side material that has a fixing portion provided at the free end portion that can be fixed against the tension caused by retracting the cover side material.

2. The seat cover fixing structure according to claim 1, The fixing portion is a through hole formed so as to penetrate the pad side material in a direction perpendicular to a surface thereof, A seat cover fixing structure in which a fixed portion fixed to the through hole of the cover side material is a hanging portion that is hooked onto the through hole against the tension.

3. The seat cover fixing structure according to claim 2, The through hole is formed in a slit shape that extends elongatedly in the acting direction of the tension when the hanging portion is in a fixed state, The hanging portion is rod-shaped and elongated in a direction perpendicular to the direction in which the tension acts when fixed to the through hole, and has a maximum diameter of a cross section shorter than the hole length of the through hole and a rod length longer than the hole length.

4. The seat cover fixing structure according to any one of claims 1 to 3, A seat cover fixing structure in which the stitching portion of the pad side material is sewn to the back material so that a stitching line extends in a direction perpendicular to the direction in which the tension acts.

Images