JP2013102855A - Structure for fixing car seat surface cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for fixing a car seat surface cover which ensures the retention of a fixing device even if a groove part is shallow when inserting an insertion part of the fixing device mounted on an edge part of the surface cover into the groove part for fixing.SOLUTION: A fixing device 23 includes a locking part 27 projecting outward in a turning direction A due to a turning force applied to the fixing device 23 by a tensile force T of a surface cover 21 at the end of an insertion part 25 in an insertion direction thereof, and a turn-preventive part 29 projecting in a direction opposite to that of the locking part 27 at a base end of the insertion part. A member 41 to be fixed has a locking nail 55 with which the locking part 27 of the fixing device 23 is engaged inside the groove portion 45, and a turn-preventive wall 59 on which the end 29a of the turn-preventive part 29 abuts, outside the groove part 45. The locking part 27 of the fixing device 23 is engaged with the locking nail 55 of the member 41 to be fixed, and the end 29a of the turn-preventive part 29 of the fixing device 23 abuts on the turn-preventive wall 59 of the member 41 to be fixed.

Description

  The present invention relates to a skin fixing structure for a vehicle seat.

  Regarding the fixing of the skin on the vehicle seat, in Patent Document 1, a long fixing tool is sewn along the edge of the skin, and the plate-like leg portion of the fixing tool is inserted into the groove of the seat frame. And what fixed the epidermis is indicated. According to this fixing method, a force for pulling out the rotating tool acts on the fixing tool due to the tension of the skin. Therefore, as a measure for preventing the pulling force to be pulled out while rotating, the leg portion of the fixing device of the cited document 1 is elastic on the surface opposite to the surface that becomes the center of rotation by interfering with the vicinity of the opening of the groove. A locking piece is provided. The elastic locking piece is thin and protrudes from the distal end of the leg in the insertion direction toward the opposing groove wall. Basically, the elastic locking piece is pressed against the groove wall by the force acting on the fixture to pull it out, that is, the leg is removed by the frictional force between the elastic locking piece and the groove wall. Prevention is aimed at. In addition, it is said that if the distance between the rotation center and the elastic locking piece is increased, it can be reliably prevented from coming out.

Japanese Utility Model Publication No. 6-82968

  However, if an attempt is made to increase the distance between the rotation center and the elastic locking piece, the leg portion becomes longer, the fixture becomes larger, and the cost increases. Further, when the leg portion of the fixture becomes longer, it is necessary to deepen the groove, so that the space to be secured for forming the groove is increased, and the degree of freedom in seat design is reduced.

  Accordingly, an object of the present invention is to reliably prevent the fixing tool from being pulled out even when the groove portion is shallow when the insertion portion of the fixing device provided at the end portion of the epidermis is inserted and fixed into the groove portion of the member to be fixed. .

  In order to solve the above problems, in the present invention, a plate-like insertion portion of a long fixture provided along an end portion of the skin is inserted into a groove portion of the member to be fixed, and the skin is fixed to the member to be fixed. In the vehicle seat skin fixing structure, the fixture has a locking portion protruding in the rotational direction due to the rotational force applied to the fixture due to the tension of the skin at the distal end of the insertion portion in the insertion direction. The base member opposite to the distal end in the insertion direction has a rotation preventing portion protruding in the opposite direction to the locking portion, and the fixed member has a locking claw that can be engaged with the locking portion of the fixing tool. The anti-rotation wall is provided on the inner side of the groove part, and the tip of the anti-rotation part abuts on the outer side of the groove part. Then, the locking portion of the fixing tool engages with the locking claw of the fixed member, and the tip of the rotation preventing portion of the fixing device is brought into contact with the rotation preventing wall of the fixing member, so that the skin is fixed to the fixing member. It is fixed to.

  According to such a skin fixing structure, the engaging portion protruding in the rotational direction by the rotational force applied to the fixture by the tension of the skin is formed at the insertion direction tip of the insertion portion of the fixture, It is engaged with the locking claw of the member. Therefore, regardless of the length of the insertion portion, the engagement between the locking portion of the fixing tool and the locking claw of the fixed member is not released due to the tension of the skin. Therefore, the fixing tool can be prevented from coming off even if the groove portion of the fixed member is shallow. At the same time, the rotation preventing portion projects from the base end opposite to the distal end of the insertion portion in the insertion direction. The overhang direction of the rotation preventing portion is opposite to the locking portion, and is directed in the pulling direction due to the skin tension. And the front-end | tip contact | abutted against the rotation prevention wall of the to-be-fixed member. This also can prevent the fixture from rotating against the tension of the epidermis. In this way, the fixture is not only engaged with the fixed member at the locking portion at the distal end in the insertion direction of the insertion portion, but also at the proximal end by suppressing rotation against the tension of the epidermis, It is possible to prevent the insertion portion from coming off while suppressing warping in the vicinity of the opening of the groove portion.

  In the present invention, the member to be fixed is provided with a concave portion that forms a step shape with the periphery, and the inner wall surface of the concave portion due to the step shape forms a rotation prevention wall, and the concave portion of the member to be fixed is With the anti-rotation portion of the fixing member being housed, the tip of the anti-rotation portion hits the anti-rotation wall of the fixed member, and the periphery of the concave portion of the fixing member and the anti-rotation portion of the fixing device are flush with each other It is preferable. In this case, the appearance of the sheet at the end of the epidermis can be improved.

  According to the vehicle seat skin fixing structure of the present invention, the insertion portion of the fixture provided at the end portion of the skin is inserted into the groove portion of the member to be fixed, and the fixture is securely prevented from coming off even if the groove portion is shallow. The epidermis can be fixed.

It is a perspective view of the vehicle seat provided with the skin fixing structure which concerns on embodiment of this invention. It is II-II sectional drawing of the seat back of the vehicle seat shown by FIG. It is a figure explaining the process which fixes an outer skin corresponding to the cross section of the seat back shown by FIG. 2, and is a figure which shows the step before a fixing tool inserts in a groove part. It is a figure explaining the process which fixes an outer skin corresponding to the cross section of the seat back shown by FIG. 2, and is a figure which shows the step which engages a fixing tool with a groove part.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
A seat 11 shown in FIG. 1 constitutes a seat of a vehicle such as an automobile, and includes a seat cushion 13 constituting a seat surface, a seat back 15 constituting a backrest surface, and a headrest 16. The seat 11 constitutes a rear seat of an automobile and is characterized by the skin fixing structure 17 of the seat back 15. F and U indicated by arrows in each figure indicate the front and upper sides of the seat 11 defined with reference to the seated person seated on the seat 11. In addition, I and O indicated by arrows in each figure are the center side and the outside of the backboard 41 determined in the spreading direction of the surface of the backboard 41 that forms the rear surface of the seatback 15. The direction around the fixed structure 17 is shown.

  The seat back 15 is formed with a backrest surface by covering a front side of a frame-type seat frame (not shown) with a seat pad (not shown). The surface of the seat pad is covered with the skin 21. The back side of the seat frame is closed with a backboard 41. The outer skin 21 covers the front and side surfaces of the seat back 15, and the peripheral edge wraps around the back side of the seat back 15. As shown in FIG. 2, the periphery of the skin 21 is fixed to the periphery of the backboard 41 by the skin fixing structure 17 via the fixture 23 provided at the end 21 a of the skin 21. The backboard 41 of this embodiment corresponds to a fixed member of the present invention.

<About the skin 21>
The material of the skin 21 is not particularly limited, and for example, a fabric or leather such as a woven fabric or a knitted fabric can be preferably used. A long fixing tool 23 disposed along the periphery of the skin 21 is sewn to the end 21a of the skin 21 (stitching line h).

<About the fixture 23>
The fixture 23 is a resin member, and is made of, for example, polypropylene. The fixture 23 is a long member, and has a plate-like insertion portion 25 formed over the entire length in the longitudinal direction. The insertion portion 25 is inserted along the groove portion 45 into a long groove (groove portion 45) of the backboard 41 described in detail later. A locking portion 27 is provided at the insertion direction end of the insertion portion 25. The locking portion 27 has a substantially right-angled triangular cross section that projects from one surface of the plate-like insertion portion 25 and is tapered in the insertion direction, and has an engagement surface 27a that faces the opening side of the groove 45 and a tapered shape. And a formed slope portion 27b. There is a plate-like protrusion arranged in a T shape at the base end of the insertion portion 25 (on the side opposite to the distal end in the insertion direction). The overhang extends more in the direction opposite to the overhang direction of the locking portion 27, and is configured as a rotation prevention portion 29. The overhang in the direction opposite to that of the rotation preventing unit 29 is smaller than that of the rotation preventing unit 29 and is referred to as a shielding unit 31 here. The rotation prevention unit 29 and the shielding unit 31 constitute a series of generally flat surfaces, and this surface is used as an operation surface 33 when the fixture 23 is fixed.

  The fixture 23 is arranged so that when the epidermis 21 is viewed from the surface side, the engaging portion 27 at the distal end in the insertion direction protrudes from the end 21 a of the epidermis 21. Then, the end portion 21a, the insertion portion 25, and the plate-like insertion portion 25 of the epidermis 21 are sewn to the epidermis 21 so as to hide the base end of the insertion portion 25 on the back surface side of the epidermis 21 (stitching line h). .

<About backboard 41>
The backboard 41 is made of resin, and is made of, for example, polypropylene. As shown in FIG. 2, the backboard 41 has a flat plate portion 43 and a groove portion 45 surrounding the flat plate portion 43, and the end 47 is curved forward. The flat plate portion 43 is covered with a carpet 44, and the end portion 44 a of the carpet 44 is slightly inserted into the groove portion 45. The groove portion 45 is open at the rear, and has a depth and a groove width at which the insertion portion 25 of the fixture 23 can be inserted.

  Inside the groove portion 45, there is provided a locking claw 55 with which a locking portion 27 provided at the distal end in the insertion direction of the fixture 23 can be engaged. The locking claw 55 is provided on the wall on the center side of the backboard 41 among the opposing walls of the groove 45, and a plurality of the locking claws 55 are provided at intervals in the longitudinal direction of the groove 45. The latching claw 55 can be bent by the elasticity of the resin material forming the backboard 41, and the opening side of the groove 45 is a fixed end, and the insertion direction front end (groove bottom side) is the groove 45. It can be bent outside. The front end of the locking claw 55 protrudes inside the groove 45. The protruding portion has a substantially right-angled triangular cross section that protrudes toward the tip side (groove bottom side), and includes an engagement surface 55a facing the bottom side of the groove portion 45, and an inclined surface 55b inclined toward the inner side of the groove portion 45 and the groove bottom side. With.

  Further, in the opening of the groove 45, a recess 49 is formed on the opening edge on the end 47 side of the backboard 41 so as to form a step shape with the periphery. That is, the concave portion 49 is provided as a stepped shape that is recessed by one step from the outside of the groove portion 45 toward the groove portion 45 when viewed in the spreading direction of the backboard 41. And the inner wall surface 59 of the recessed part 49 by this level | step difference shape comprises the rotation prevention wall. The concave portion 49 and the groove portion 45 are continuous via a smooth curved portion 57 having no corners.

  The skin 21 is turned from the front side to the rear side of the seat back 15 so as to wrap the end 47 of the backboard 41, and the insertion portion 25 of the fixture 23 provided at the end portion 21 a of the skin 21 is provided with the groove portion 45. To be fixed to the backboard 41. While explaining the process of fixing the skin 21 to the backboard 41, the structure of the skin fixing structure 17 will be described in more detail.

  First, the end portion 21a of the outer skin 21 covering the front side of the seat back 15 is made to wrap around to the rear side, and as shown in FIG. 3, the tip of the plate-like insertion portion 25 is at the center side of the back board 41 (the groove portion 45 side). ), The fixture 23 is placed along the end 47 of the backboard 41. Next, the insertion part 25 is inserted into the groove part 45. In inserting the insertion portion 25 into the groove portion 45, the fixing member 23 is inserted along the backboard 41 while being rotated from the outside toward the center side. Here, a recess 49 is formed in the opening of the groove 45 and has a step shape that goes down one step from the outside to the center side, so that it is easy to rotate. Therefore, as shown in FIG. 4, the operation surface 33 projecting from the base end of the insertion portion 25 at a substantially right angle can be easily inserted by an operation of pushing the skin 21 from above the skin 21 with a finger. That is, when the operation surface 33 of the fixture 23 along the backboard 41 is pushed toward the center of the backboard 41 on the end 47 side of the backboard 41, the fixture 23 is brought into the step shape and the curved shape portion 57 of the recess 49. The leading end (locking portion 27) of the insertion portion 25 is inserted into the groove portion 45 by being guided and rotated.

  Next, the insertion part 25 is advanced to the back of the groove part 45. What is necessary is just to push the operation surface 33 to the depth direction of the groove part 45. FIG. When the insertion portion 25 advances, the locking portion 27 at the tip interferes with the locking claw 55 that protrudes inside the groove portion 45. When the insertion portion 25 is further advanced, as shown by a two-dot chain line in FIG. 4, it is inserted by bending the locking claw 55 outward of the groove portion 45 while being guided by the inclined surface 55 b of the locking claw 55. Progression of part 25 is allowed. When the locking portion 27 passes completely through the locking claw 55, the locking claw 55 returns to its original state due to its own elasticity and protrudes into the groove 45 (FIG. 2). The locking claw 55 protrudes on the opening side of the groove 45 from the locking part 27 of the fixing tool 23, and the groove 45 formed in the engaging surface 55 a at the tip of the locking claw 55 and the locking part 27 of the fixing tool 23. The engagement surface 27a facing the opening side is overlapped in the groove width direction and faces each other. The engaging portion 27 of the fixing tool 23 and the engaging claw 55 of the groove portion 45 are engaged with each other, so that the fixing device 23 is prevented from coming out of the groove portion 45. As described above, the skin 21 is fixed to the backboard 41.

  When fixing the skin 21 to the backboard 41, the fixture 23 is prevented from coming off in the groove 45 while a tension T is applied to the skin 21 so that the skin 21 does not become slack. Therefore, in the fixed state, due to the tension T of the epidermis 21, a force to pull out the fixing tool 23 while rotating. At the distal end of the insertion portion 25 in the insertion direction, as indicated by an arrow A in FIG. However, the locking portion 27 of the insertion portion 25 protrudes toward the center, which is the direction in which the rotational force acts, and engages with the locking claw 55. Even if the locking portion 27 is about to rotate to the center side, the locking claw 55 of the groove portion 45 follows the locking portion 27 by its own elastic force. Does not change. Therefore, the engagement between the locking portion 27 and the locking claw 55 is not released by the rotational force, and the retaining state is maintained. Further, even when there is some variation in the overhanging dimension of the locking portion 27 of the fixing tool 23 and the locking claw 55 of the groove portion 45, and the mutual overlap length is reduced, the locking portion 27 of the fixing tool 23 is reduced. Projecting in the direction in which the rotational force acts, the engagement is unlikely to be disengaged by the rotational force.

  When the locking part 27 passes through the locking claw 55 and the epidermis 21 is in a fixed state, the rotation preventing part 29 just fits in the concave part 49 of the backboard 41 on the proximal end side of the insertion part 25, and around the concave part 49. And the rotation prevention unit 29 are flush with each other. In the fixed state, the epidermis 21 covers and hides the fixture 23, and is folded back along the shielding portion 31 protruding toward the center side of the backboard 41 at the proximal end of the insertion portion 25, and the end portion 21 a is the above-described portion of the insertion portion 25. It is sewn on the surface on the center side and fits inside the groove 45. Therefore, the fixture 23 is covered with the skin 21 and cannot be seen from the outside of the seat back 15. The end portion 21 a of the skin 21 and the end portion 44 a of the carpet 44 covering the flat plate portion 43 of the backboard 41 are located inside the groove portion 45 rather than the shielding portion 31 of the fixture 23. The projecting dimension of the shielding part 31 and the width of the groove part 45 are such that no gap is generated between the skin 21 and the carpet 44. More specifically, the shielding part 31 is large enough to interfere with the carpet 44. Therefore, the skin 21 and the carpet 44 are accommodated in the groove 45 in a state in which the end portions 21 a and 44 a are in pressure contact with each other, and cannot be seen from the outside of the seat back 15. Further, since there is no gap between the skin 21 and the carpet 44, the inside of the groove 45 cannot be seen. Here, the portion of the skin 21 that strongly interferes with the carpet 44 is a portion that wraps the tip of the plate-shaped shielding portion 31, and the contact area with the carpet 44 is small. Therefore, the frictional force with the carpet 44 when the fixing tool 23 is advanced to the depth of the groove 45 to be in a fixed state is small, and workability is not impaired.

  The tension T of the skin 21 acts as a force toward the outside in the spreading direction of the backboard 41 at the base end of the insertion portion 25 as it is. Here, the anti-rotation portion 29 provided at the base end of the fixture 23 is formed so as to protrude outward in the spreading direction of the backboard 41 along the direction of action of the tension T, and is formed in the concave portion 49 of the backboard 41. It is settled. Therefore, the tip 29 a is abutted against the inner wall surface 59 of the recess 49 by the tension T, and the displacement of the fixture 23 by the tension T is suppressed. Moreover, it can also suppress that the insertion part 25 curves in the opening vicinity of the groove part 45, and it can prevent that a space | gap arises between the skin 21 and the carpet 44. FIG. The inner wall surface 59 of the recess 49 corresponds to the rotation prevention wall of the present invention.

  According to the skin fixing structure 17 having the above configuration, the following functions and effects can be obtained. At the distal end of the fixing device 23 in the insertion direction, the locking portion 27 engages with the locking claw 55, so that the fixing device 23 is reliably prevented from coming off even if the groove portion 45 is shallow. At the same time, at the base end of the fixture 23, the rotation preventing portion 29 protrudes in the direction of the action of the tension T of the skin 21, and the tip 29 a hits the rotation preventing wall (the inner wall surface 59 of the recess 49). Resist. In this manner, the fixture 23 is reliably prevented from coming off while restraining the insertion portion 25 from warping by opposing the tension T of the epidermis 21 at the distal end and the proximal end in the insertion direction. By suppressing the warping of the insertion portion 25, it is possible to prevent gaps between the skin 21 and the carpet 44 and improve the appearance of the seat back 15.

  In order to prevent the fixture 23 from coming off in the groove portion 45, the fixture 23 is operated while generating a tension T on the skin 21. However, since the curved portion 57 is provided at the opening edge of the groove portion 45, the fixture 23. It is possible to smoothly insert the groove 23 into the groove 45 while rotating the fixture 23 by pushing the base end (operation surface 33). Here, the opening edge of the groove 45 also has a step-shaped recess 49 that is recessed in the direction in which the fixture 23 is pushed (from the outside of the backboard 41 toward the center) and continues to the curved portion 57. It is easy to rotate. Further, by further pressing, the locking portion 27 of the fixture 23 and the locking claw 55 of the groove portion 45 can be elastically engaged. The work can be easily done because it can be prevented from coming off only by pushing. Further, the fixing tool 23 is rotated while propelling from the outside of the backboard 41 to the center side, and the fixing tool 23 is inserted into the groove portion 45, thereby minimizing the amount of pulling of the epidermis 21 when fixing the epidermis 21. be able to. That is, the skin 21 can be fixed while being pulled as much as necessary for fixing.

  Further, in the fixed state, the rotation preventing portion 29 is accommodated in the concave portion 49 of the backboard 41 and is flush with the surroundings, so that the outer shape of the seat back 15 can be made smooth.

  Note that the present invention can be applied not only to the seat back 15 but also to a seat cushion, an ottoman, a headrest, an armrest, or the like.

11 seat 15 seat back 17 skin fixing structure 21 skin 21a (skin) end 23 fixing tool 25 insertion part 27 locking part 29 anti-rotation part 41 backboard (fixed member)
45 Groove 49 Recess 55 Locking Claw 57 Curved Shape 59 Inner Wall (Rotation Prevention Wall)

Claims (2)

It is a skin fixing structure for a vehicle seat in which a plate-like insertion portion of a long fixing tool provided along an edge of a skin is inserted into a groove of a member to be fixed and the skin is fixed to the member to be fixed. And
The fixing device has a locking portion that protrudes in a rotation direction due to a rotational force applied to the fixing device by a tension of the epidermis at a distal end in the insertion direction of the insertion portion, and is opposite to a distal end in the insertion direction of the insertion portion. A rotation preventing portion that projects in the opposite direction to the locking portion at the base end of the
The fixed member has a locking claw that can be engaged with a locking portion of the fixing tool on the inner side of the groove portion, and has an anti-rotation wall on the outer side of the groove portion with which the tip of the rotation prevention portion abuts. And
The locking portion of the fixing tool is engaged with the locking claw of the fixed member, and the tip of the rotation preventing portion of the fixing member is in contact with the rotation preventing wall of the fixed member. The skin fixing structure for a vehicle seat, wherein the skin is fixed to the fixed member. The skin fixing structure for a vehicle seat according to claim 1,
In the fixed member, a concave portion that forms a step shape with the periphery is provided at an opening edge of the groove portion, and an inner wall surface of the concave portion due to the step shape constitutes the rotation prevention wall, and the fixed member In a state where the rotation prevention part of the fixing tool is accommodated in the recess, the tip of the rotation prevention part abuts against the rotation prevention wall of the fixed member, and the periphery of the recess of the fixing member and the fixing tool The vehicle seat skin fixing structure, wherein the rotation preventing portion is flush with the vehicle seat.

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