Seat cover fixing structure

Abstract

The invention provides a seat cover fixing structure. A seat cover fixing structure (1) for fixing a cover end (12A) of a seat cover to a cushion back surface of a seat cushion (11) is provided with: a planar cover side member (2) that forms a pull-in portion of the cover end (12A) that is pulled in along the cushion back surface; and a planar cushion side member (3) provided with a sewn portion (3B) sewn so as to form a free end portion (3C) that can be partially rolled up with respect to a rear surface member (11A) integrally formed along the cushion rear surface of the seat cushion (11), and a through hole (3A) (fixing portion) provided in the free end portion (3C) and capable of fixing the cover side member (2) against tension generated by pulling in.

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 end of a seat cover to a pad back surface of a seat pad. Background Art

[0002] Patent Document 1 discloses a structure in which a cover end of a seat cover is pulled into the back side of a seat pad and fixed. Specifically, the seat cover is fixed to the back side of the seat pad by pressing and coupling a female fastener sewn to the end of the seat cover to a male fastener integrally formed on the back side of the seat pad.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2021-041011 Summary of the invention

[0006] Problems to be solved by the invention

[0007] In the above-mentioned prior art, a plane for setting a surface fastener on the back of the seat pad must be ensured, and the freedom of shape is easily impaired. Therefore, the present invention provides a seat cover fixing structure that can fix a cover end of a seat cover to a seat pad while ensuring the freedom of pad shape.

[0008] Means for solving problems

[0009] As a means for solving the above-mentioned problems, the seat cover fixing structure of the present invention adopts the following means.

[0010] That is, the first invention of the present invention is a seat cover fixing structure, which is used to fix the cover end of the seat cover to the cushion back side of the seat cushion, wherein the seat cover fixing structure comprises: a planar cover side member, which forms a pull-in portion of the cover end that is pulled in along the cushion back side; and a planar cushion side member, which has a sewing portion and a fixing portion, wherein the sewing portion is sewn relative to a back member integrally formed along the cushion back side of the seat cushion in a manner of forming a free end portion that can be partially rolled up, and the fixing portion is arranged at the free end portion and can fix the cover side member by overcoming the tension generated by pulling in.

[0011] According to the first invention, by sewing the cushion side member to which the cover end can be fixed to the back member of the seat cushion so as to form a free end portion that can be partially rolled up, the installation space of the cushion side member relative to the back member can be reduced. As a result, the cushion shape freedom of the seat cushion can be appropriately ensured, and the cover end of the seat cover can be appropriately fixed to the cushion back of the seat cushion.

[0012] The second invention of the present invention is a seat cover fixing structure. In the above-mentioned first invention, the fixing portion is configured to be a through hole formed in the cushion side member in a manner that penetrates in the direction perpendicular to the surface, and the fixed portion of the cover side member fixed to the through hole is configured to be fixed to the hook portion of the through hole by hooking on the through hole to overcome the tension.

[0013] According to the second invention, by using the fixing portion provided on the cushion side member as a through hole, even if the foamed resin material is wound around the through hole due to integral molding with the seat cushion, the portion blocking the through hole can be easily removed after molding, so that the through hole can function properly. That is, unlike a structure such as a surface fastener in which the function is easily impaired due to the foamed resin material being wound around, the fixing portion can be set to a structure that is less likely to cause a problem caused by integral molding.

[0014] The third invention of the present invention is a seat cover fixing structure. In the above-mentioned second invention, the through hole is in the shape of a slit extending slenderly along the direction of action of the tension when the hook portion is in a fixed state, and the hook portion is in the shape of a rod extending slenderly along a direction orthogonal to the direction of action of the tension 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.

[0015] According to the third invention, the rod-shaped hooking part can be easily inserted into the slit-shaped through hole by passing the cross section having the maximum diameter shorter than the hole length in the length direction. Furthermore, after the insertion, the rod-shaped hooking part is provided on the side member in a manner extending in a direction orthogonal to the through hole extending in the direction of action of the tension, so that the hooking part is difficult to fall off from the through hole.

[0016] A fourth invention of the present invention is a seat cover fixing structure, wherein in any one of the first to third inventions, the sewn portion of the cushion side member is sewn relative to the back member in a manner such that the sewing line extends in a direction orthogonal to the direction in which the tension acts.

[0017] According to the fourth invention, the cushion side member can be provided so as to be able to exert high tensile strength with respect to the back member. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a perspective view showing a schematic structure of a seat cover fixing structure according to the first embodiment.

[0019] Figure 2 It is a perspective view showing a state before the cover side member is fixed to the cushion side member.

[0020] Figure 3 It is a perspective view showing a state where the cover side member is fixed to the cushion side member.

[0021] Figure 4 yes Figure 3 Bottom view of . DETAILED DESCRIPTION

[0022] Hereinafter, a mode for carrying out the present invention will be described using the drawings.

[0023] <<First Implementation Method>>

[0024] (Schematic Structure of Seat Cover Fixing Structure 1)

[0025] First, use Figure 1~Figure 4 The structure of a seat cover fixing structure 1 according to a first embodiment of the present invention will be described. In the following description, when directions such as front, back, top, bottom, left, and right are indicated, these directions are referred to in the respective drawings. In the following description, when a specific reference drawing is not indicated or when there is no corresponding reference numeral in the reference drawing, a reference will be made to the corresponding reference numeral as appropriate. Figure 1~Figure 4 Any of the graphs in .

[0026] like Figure 1 As shown, the seat cover fixing structure 1 of the present embodiment is applied to a seat cushion 10 constituting a seating portion of a vehicle seat. Figure 1 The seat cushion 10 is a perspective view showing a portion of the seat back in an enlarged manner. The seat cushion 10 includes a seat frame (not shown) forming its framework, a seat pad 11 covering the seat frame from above, and a seat cover 12 covering the seat pad 11 from the pad surface side.

[0027] The seat pad 11 is made of a polyurethane foamed body. The seat pad 11 is formed with a back member 11A made of a nonwoven fabric integrally formed along the back of the pad. The back member 11A is set in a molding die of the seat pad 11, and is molded in a manner of being integrally bonded along the back of the pad by foaming a foamed resin raw material of the seat pad 11 in the mold.

[0028] The seat cover 12 is made of a fabric planar member. The seat cover 12 covers the seat pad 11 from the pad surface side. The front, rear, left, and right peripheral edges of the seat cover 12 are pulled toward the pad back side of the seat pad 11 and fixed. As a result, the seat cover 12 is widely stretched by the pad surface of the seat pad 11.

[0029] In addition, along with the above-mentioned pulling, the seat cover 12 reels in a seat frame (not shown) that supports the seat cushion 11 on the back side, and presses the seat cushion 11 against the seat frame. Thus, along with the pulling, the seat cover 12 positions the seat cushion 11 on the seat frame.

[0030] A cover end 12A of a portion of the rear side of the seat cover 12 in the peripheral portion of the seat cover 12 is pulled in from the rear to the front along the back surface of the seat cushion 11 and fixed to the back member 11A on the back surface of the cushion by the seat cover fixing structure 1. Figure 2~Figure 3 As shown, the seat cover fixing structure 1 is composed of a belt-shaped cover side member 2 sewn to the cover end 12A and pulled along the back surface of the cushion, and a long strip-shaped cushion side member 3 sewn to the back surface member 11A of the seat cushion 11 and fixing the cover side member 2.

[0031] like Figure 2 As shown, the cover side member 2 is sewn with a flat rod-shaped resin plate 2A extending elongated in a direction perpendicular to the belt length direction at the front end portion in the belt length direction which is the pulling direction. Figure 3 As shown, the resin plate 2A functions as a hooking portion that is inserted into and hooked into the through hole 3A formed in the gasket side member 3. Here, the resin plate 2A is equivalent to the "fixed portion" and "hooking portion" of the present invention. In addition, the through hole 3A is equivalent to the "fixing portion" of the present invention.

[0032] like Figure 2 As shown, the hood side member 2 is composed of a single strip-shaped member. Specifically, the hood side member 2 includes: a pull-in belt portion 2B extending from a sewing portion with a hood end 12A in the belt length direction with a substantially constant belt width; and a plate mounting portion 2C extending the belt width at the front end of the pull-in belt portion 2B in the belt length direction. The plate mounting portion 2C is configured to expand the belt width into a trapezoidal shape via a diameter expansion portion 2D that expands the belt width obliquely from the pull-in belt portion 2B.

[0033] The resin plate 2A is sewn to the plate mounting portion 2C. The resin plate 2A has a rod length L that is substantially the same as the belt width of the plate mounting portion 2C. The resin plate 2A is sewn to the plate mounting portion 2C over substantially the entire area in the belt width direction. The resin plate 2A is formed in a flat bar shape having a rectangular cross section.

[0034] The side surface of the resin plate 2A constituting the long side of its cross section is abutted and sewn to the plate mounting portion 2C of the cover side member 2. The maximum diameter φ2 of the cross section of the resin plate 2A (i.e., the length of the long side in the cross section) is shorter than the hole length φ1 of the through hole 3A of the cushion side member 3.

[0035] The pad side member 3 has a slit-shaped through hole 3A extending elongated in the belt length direction at the center of the long belt width direction of the pad side member 3. The through hole 3A is formed in the middle of the two ends in the belt length direction of the pad side member 3. Circular expansion holes A1 are formed at both ends of the through hole 3A to prevent damage caused by stress concentration.

[0036] One end of the cushion side member 3 in the belt length direction is sewn to the back member 11A (sewing portion 3B) of the seat cushion 11. The sewing portion 3B is sewn over the entire area in the belt width direction in such a manner that the sewing thread extends in the belt width direction of the cushion side member 3. As a result, the portion of the cushion side member 3 extending in the belt length direction from the sewing portion 3B thereof serves as a free end portion 3C, which can be bent in a manner of rolling up from the back member 11A. The through hole 3A is formed in the free end portion 3C away from the sewing portion 3B. The free end portion 3C extends from the sewing portion 3B to the rear, that is, in the direction in which the cover side member 2 is pulled in.

[0037] The cushion side member 3 is sewn to the back member 11A before the back member 11A is integrally formed with the seat cushion 11. The cushion side member 3 is set together with the back member 11A in the molding die of the seat cushion 11 and is integrally formed with the seat cushion 11. At this time, the cushion side member 3 is sewn to the surface of the back member 11A on the opposite side to the surface integrally formed with the seat cushion 11, so that the foamed resin material is basically difficult to be wound around.

[0038] Specifically, the cushion side member 3 is not sewn to the edge of the back member 11A but to the middle portion away from the edge, so that the foamed resin material is basically difficult to be wound back. However, even if the foamed resin material of the cushion side member 3 is wound back so as to block the through hole 3A during the above-mentioned molding, the portion blocking the through hole 3A can be easily removed after molding.

[0039] That is, since the functional portion of the cushion side member 3 for fixing the cover side member 2 is formed as the through hole 3A, compared with a structure in which the foamed resin material is easily clogged such as a surface fastener, it can be easily used by simply removing the portion that clogs the through hole 3A after molding. Therefore, it is not necessary to provide other components such as a shielding member to prevent the foamed resin material from winding back, and it is possible to easily perform integral molding with the seat cushion 11.

[0040] The cushion side member 3 is formed of a planar member made of polyester canvas. Therefore, even if the cushion side member 3 is heated when integrally formed with the seat pad 11, it is difficult to cause thermal deformation such as bending. Therefore, even if the cushion side member 3 is integrally formed with the seat pad 11, the state of being sewn so as to extend along the back member 11A can be appropriately maintained.

[0041] With respect to the above-mentioned cushion side member 3, the cover side member 2 is configured such that the resin plate 2A is inserted into and fixed to the through hole 3A in the following manner. Figure 2 As shown, first, the cushion side member 3 is rolled up from the back member 11A, and the through hole 3A is pulled open from the back member 11A. Next, while the cover side member 2 is pulled toward the cushion side member 3 along the belt length direction, the resin plate 2A is inserted into the through hole 3A from the back side of the cushion side member 3, that is, the side facing the back member 11A.

[0042] Specifically, first, the resin plate 2A is twisted longitudinally so as to pass through the through hole 3A in the longitudinal direction. Then, the resin plate 2A is inserted into the through hole 3A together with the plate mounting portion 2C. Figure 3~Figure 4 As shown, the resin board 2A is at a position where it is embedded in the front end of the through hole 3A, and is returned to the horizontal state by the restoring force of the board mounting portion 2C.

[0043] After that, the pulling force applied to the cover side member 2 is unloaded. Thus, the resin plate 2A is hooked in a manner that does not fall off from the through hole 3A and abuts against the surface of the cushion side member 3 due to the tension caused by the pulling of the cover side member 2. By this hooking, the cover side member 2 overcomes the tension caused by the pulling and is fixed to the cushion side member 3.

[0044] The resin plate 2A is inserted into the through hole 3A from the back side of the cushion side member 3, that is, the side facing the back member 11A. Thus, the resin plate 2A is inserted into the front side of the cushion side member 3, that is, the side not facing the back member 11A (the side visible from the outside). Therefore, the operator can properly confirm whether the resin plate 2A is properly inserted into the through hole 3A by visual observation. In addition, compared with the case where the resin plate 2A is inserted into the back side of the back member 11A, the resin plate 2A is located in a position that is easy to visually confirm and easy to grasp by hand, so the operation of removing the resin plate 2A from the through hole 3A can also be easily performed.

[0045] The resin plate 2A has a rod length L that is 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 naturally oriented orthogonal to the extending direction of the through hole 3A. Even if the resin plate 2A is rotated in an orientation extending in the same direction as the extending direction of the through hole 3A, it is difficult to fall out of the through hole 3A. That is, the resin plate 2A is configured to be easy to insert into the through hole 3A but difficult to pull out.

[0046] In summary, the seat cover fixing structure 1 of the present embodiment has the following structure. In addition, the reference numerals in parentheses below are reference numerals corresponding to the respective structures shown in the above-mentioned embodiment.

[0047] That is, a seat cover fixing structure (1) for fixing the cover end (12A) of a seat cover (12) to the back side of a seat cushion (11) comprises: a planar cover side member (2) forming a pull-in portion of the cover end (12A) that is pulled in along the back side of the cushion; and a planar cushion side member (3) having a sewing portion (3B) and a fixing portion (3A), wherein the sewing portion (3B) is sewn relative to a back member (11A) integrally formed along the back side of the seat cushion (11) in a manner to form a free end portion (3C) that can be partially rolled up, and the fixing portion (3A) is provided at the free end portion (3C) and can fix the cover side member (2) by overcoming the tension generated by pulling in.

[0048] In this way, by sewing the cushion side member (3) capable of fixing the cover end (12A) to the back member (11A) of the seat cushion (11) in such a manner as to form a free end (3C) capable of being partially rolled up, the installation space of the cushion side member (3) relative to the back member (11A) can be reduced. As a result, the cushion shape of the seat cushion (11) can be appropriately secured, and the cover end (12A) of the seat cover (12) can be appropriately fixed to the cushion back of the seat cushion (11).

[0049] In addition, the fixing portion (3A) is formed as a through hole (3A) formed in the pad side member (3) in a manner penetrating in a direction perpendicular to the surface. The fixed portion (2A) of the cover side member (2) fixed to the through hole (3A) is a hooking portion (2A) fixed to the through hole (3A) by hooking to the through hole (3A) to overcome tension.

[0050] In this way, by providing the fixing portion (3A) provided on the cushion side member (3) as a through hole (3A), even if the foamed resin material is wound around the through hole (3A) by integral molding with the seat cushion (11), the portion blocking the through hole (3A) can be easily removed after molding, so that the through hole (3A) can function properly. That is, unlike a structure such as a surface fastener where the function is easily impaired due to the foamed resin material being wound around, the fixing portion (3A) can be provided with a structure that is less likely to cause a problem due to integral molding.

[0051] In addition, the through hole (3A) is in the shape of a slit extending elongatedly in the direction of action of tension when the hook portion (2A) is fixed. The hook portion (2A) is in the shape of a rod extending elongatedly in the direction orthogonal to the direction of action of tension when the hook portion (2A) is fixed to the through hole (3A), and has a maximum diameter (φ2) of the cross section shorter than the hole length (φ1) of the through hole (3A) and a rod length (L) longer than the hole length (φ1).

[0052] According to the above structure, the rod-shaped hook portion (2A) can be easily inserted into the liner side member (3) by passing the cross section having the maximum diameter (φ2) shorter than the hole length (φ1) through the slit-shaped through hole (3A) in the longitudinal direction. After the insertion, the rod-shaped hook portion (2A) is provided on the gasket side member (3) in a manner extending in a direction orthogonal to the through hole (3A) extending in the direction of action of the tension, thereby making it difficult for the hook portion (2A) to fall off from the through hole (3A).

[0053] In addition, the sewing portion (3B) of the pad side member (3) is sewn relative to the back member (11A) in a manner such that the sewing thread extends in a direction perpendicular to the direction in which the tension acts. According to the above structure, the pad side member (3) can be arranged to be able to exert high tensile strength relative to the back member (11A).

[0054] The hook portion (2A) is arranged at the front end portion of the cover side member (2) in the pulling-in direction of the cover side member (2).

[0055] The hook portion (2A) is a resin plate.

[0056] The sewn portion (3B) is located at a position farther from the position where the cover side member (2) is pulled in than the free end portion (3C) in the longitudinal direction of the pad side member (3).

[0057] The sewing portion (3B) of the cushion side member (3) is provided on a surface of the back member (11A) opposite to a surface integrally formed with the seat cushion (11).

[0058] When the hook portion (2A) is in a fixed state, a cushion side member (3) is arranged between the hook portion (2A) and the back member (11A), or a hook portion (2A) is arranged between the cushion side member (3) and the back member (11A).

[0059] The slit-shaped through hole (3A) has expansion holes (A1) at both ends.

[0060] 《Regarding other implementation methods》

[0061] As mentioned above, although the embodiment of the present invention was described using one embodiment, the present invention can be implemented in various forms other than the above-described embodiment.

[0062] 1. The seat cover fixing structure of the present invention can be applied to seats for vehicles other than railways and other vehicles, such as airplanes and ships. In addition, the seat cover fixing structure can be applied to seats other than vehicles, such as seats installed in various facilities such as sports facilities, theaters, concert venues, event venues, and massage seats. In addition, the seat cover fixing structure can be applied to seat backs in addition to seat cushions.

[0063] 2. The cover side member, i.e., the surface member forming the pull-in portion of the cover end that is pulled in along the back surface of the cushion, may be formed of the cover end itself, in addition to being sewn to the surface member of the cover end. The cover side member and the cushion side member may be formed of a carpet member, other fabric member, or leather member, in addition to being formed of a surface member made of polyester canvas. The cover side member and the cushion side member may be formed of the same material or different materials.

[0064] 3. The combination of the fixing portion provided on the cushion side member and the fixed portion provided on the cover side member is not limited to a specific combination. For example, a through hole (fixing portion) may be provided on the cover side member, and a hooking portion (fixed portion) may be provided on the cushion side member to be hooked to the through hole by hooking to the through hole to overcome the tension. In addition to the rod-shaped member such as the resin plate shown in the above embodiment, the hooking portion may also be composed of a hooking button such as a round button that is hooked to the through hole by diving into the through hole, or a hooking member such as a J hook whose front end hook is hooked to the through hole.

[0065] In addition, the combination of the fixing part and the fixed part is not limited to the combination of the through hole and the hook part, but can also be composed of a combination of a male fastener and a female fastener. The through hole is not limited to a slit-shaped hole, but can also be composed of a combination of a large diameter hole for the hook part to pass through and a small diameter hole for the hook part to hang on.

[0066] 4. The sewing portion of the back member sewn to the cushion side member may be sewn to the back member in a manner that forms a free end portion that can be partially rolled up, and may be sewn along one side of the cushion side member or may be sewn along two or three adjacent sides. In addition, as long as the sewing portion is sewn to form a free end portion that can be rolled up in a portion, it may not be a shape in which the sewing thread is open in an end shape, but may be a shape in which it is closed in a loop shape. In addition, the sewing portion is not limited to the edge of the cushion side member, and the middle portion away from the edge may be sewn to the back member.

[0067] The free end of the cushion side member may be arranged to extend in a direction opposite to the direction in which the cover side member is pulled in, in addition to being arranged to extend in a direction in which the cover side member is pulled in from the sewing portion. In addition, the free end of the cushion side member may be arranged to extend in a direction other than this. For example, when the fixing portion is a slit-shaped through hole, the cushion side member may be twisted in a direction in which the through hole is elongated and extended in the direction of the tension by the tension generated by the hooking portion of the cover side member being hooked in the through hole, with the sewing portion as a fulcrum.

Claims

1. A seat cover fixing structure for fixing a cover end of a seat cover to a cushion back surface of a seat cushion, wherein: The seat cover fixing structure comprises: A planar cover side member having a pull-in portion of the cover end that is pulled in along the back surface of the cushion; and The planar cushion side member includes a sewing portion and a fixing portion, wherein the sewing portion is sewn relative to a back member integrally formed along the back surface of the cushion of the seat cushion in a manner to form a free end portion that can be partially rolled up, and the fixing portion is arranged at the free end portion and can fix the cover side member by overcoming the tension generated by pulling in.

2. The seat cover fixing structure according to claim 1, wherein: The fixing portion has a through hole formed in the gasket side member in a manner penetrating in a direction perpendicular to the surface. The fixed portion provided on the cover side member is a hooking portion that is fixed to the through hole by hooking on the through hole to overcome the tension.

3. The seat cover fixing structure according to claim 2, wherein: The through hole is in the shape of a slit extending elongatedly along the direction of action of the tension when the hook portion is fixed. The hook portion is in the shape of a rod extending elongated in a direction perpendicular to the direction of action of the tension 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.

4. The seat cover fixing structure according to any one of claims 1 to 3, wherein: The sewn portion is a portion where the pad side member is sewn to the back member, and a sewing line of the sewn portion extends in a direction orthogonal to a direction in which the tension acts.

5. The seat cover fixing structure according to claim 2 or 3, wherein: The hook portion is provided at a front end portion of the cover side member in a pulling-in direction of the cover side member.

6. The seat cover fixing structure according to claim 2 or 3, wherein: The hooking portion is a resin plate.

7. The seat cover fixing structure according to any one of claims 1 to 3, wherein: The sewn portion is located at a position farther from a position where the cover side member is pulled in than the free end portion in the longitudinal direction of the pad side member.

8. The seat cover fixing structure according to any one of claims 1 to 3, wherein: The sewn portion of the pad side member is provided on a surface of the back member that is opposite to a surface integrally formed with the seat pad.

9. The seat cover fixing structure according to claim 2 or 3, wherein: In the fixed state of the hook portion, the cushion side member is arranged between the hook portion and the back member, or the hook portion is arranged between the cushion side member and the back member.

10. The seat cover fixing structure according to claim 3, wherein: The slit-shaped through hole has expansion holes at both ends.

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