JP5649392B2 - Seat cushion structure - Google Patents

Description

  The present invention relates to a vehicle seat cushion structure, and more particularly, to a back seat noise prevention structure that is placed and fixed on a floor panel.

  Conventionally, in order to prevent the so-called submarine phenomenon that the passenger slips forward and obliquely downward when the front side of the vehicle collides with the vehicle seat, the front seat is prevented from slipping by a foam material harder than the seat cushion body. A vehicle seat cushion structure in which members are arranged is known.

  Referring to FIG. 7, according to Patent Document 1, a laterally long groove portion 113 that opens downward is formed in the first half of the bottom surface portion 112 of the seat cushion 101 of the vehicle seat. In the seat cushion structure of the vehicle seat in which the front slip prevention member 102 made of a hard foam material is fitted rather than the seat cushion 101 main body that prevents the front seat of the occupant seated at the time, etc. An invention is disclosed in which a plurality of receiving portions 114 projecting toward the center side of the groove portion 113 are provided, and the front slip prevention member 102 fitted into the groove portion 113 is received thereby to prevent the drop-out. The bottom surface portion 121 and the seating surface portion 151 of the front slip prevention member 102 are configured to support the front slip prevention member 102 in a superimposed manner.

  Patent Document 2 also discloses an invention that solves such a problem that a seat pad having such a polystyrene foam disposed on the back surface generates abnormal noise due to stick-slip with a floor panel by slight movement. Has been.

  For example, referring to FIG. 8, according to Patent Document 2, a foam molded body 220 is disposed on the back surface of the side support portion 204 of the seat pad 201, and the bottom surface of the foam molded body 220 is covered with a supporter material 230 made of a nonwoven fabric or the like. In other words, an invention is disclosed in which the generation of abnormal noise due to sliding between the foam molded body 220 and a seat frame or the like is prevented.

JP 2009-56190 A JP 2009-297285 A

  However, in the seat pad described in Patent Document 1, as pointed out by Patent Document 2, when the vehicle is moved or when a passenger is seated, the seat pad 151 and the foamed molded body are used to prevent the pre-slip. There was a problem that the member 102 was rubbed and an abnormal noise due to stick-slip was generated.

  Further, in the seat cushion structure described in Patent Document 2, in order to prevent the generation of abnormal noise due to sliding between the foam molded body 220 and the seat frame when the vehicle is moved or when the passenger is seated, etc. Since the entire bottom surface of the foamed molded product 220 is covered with the supporter material 230, there is a problem that costs and manufacturing processes increase.

  Therefore, an object of the present invention is to provide a seat cushion structure in which the floor panel and the insert member do not rub against each other even if the entire surface of the insert member is not covered with a support material such as a nonwoven fabric.

In order to solve the above problems, the seat cushion structure of the present invention is placed on a floor panel with a seat member interposed therebetween, and a groove portion formed so as to open downward in a front half bottom surface portion of the seat cushion, and in the groove portion embedded, a seat cushion structure having an insert member of a hard steel foam material than the seat cushion, said toward the opening front edge of the groove from the opening back edge of the groove, between the insert member and the floor panel An extended piece extended, and a sheet member disposed between the insert member and the floor panel around the opening front edge of the groove, the rear end of the sheet member and the front end of the extended piece The insert member is not in contact with the floor panel.

  According to the present invention, even if the entire surface of the insert member is not covered with a support material such as a non-woven fabric, the floor panel and the insert member are not rubbed and no abnormal noise is generated. A seat cushion capable of realizing a reduction in the amount of forward and downward movement can be manufactured at low cost.

It is a perspective view of the seat cushion structure of the present invention. It is the perspective view which looked at the seat cushion structure of the present invention from the lower part. It is sectional drawing which follows the AA line of FIG. It is sectional drawing which follows the BB line of FIG. It is sectional drawing which shows other embodiment of this invention. It is sectional drawing which shows another embodiment of this invention. It is sectional drawing of the seat cushion structure of a prior art example. It is sectional drawing of the seat pad of a prior art example.

(Embodiment 1)
Hereinafter, the first embodiment will be described with reference to the drawings.

  In the following description, the terms “upper”, “lower”, “side”, “front”, and “rear” represent those corresponding to “upper”, “lower”, “side”, “front”, and “rear”, respectively. I will decide.

  FIG. 1 shows a perspective view of the appearance of the seat cushion of the present invention. A seat cushion that can utilize the seat cushion structure of the present invention includes a seat cushion 1, an insert member 2, and a seat back 15.

  FIG. 2 shows a perspective view of the seat cushion 1 when viewed from below. The bottom surface of the seat cushion 1 has a groove portion 5 that opens downward. The groove portion 5 has a substantially rectangular shape when viewed from below the seat cushion 1, and an extended piece 3 is formed on the rear opening edge portion 6. An insert member 2 described later is embedded in the groove portion 5. The extending piece 3 holds the insert member 2 in a state of being embedded in the groove portion 5 of the seat cushion 1. As will be described later, since the seat cushion 1 and the insert member 2 are integrally formed by so-called insert formation, the insert member 2 is embedded in a state of being in close contact with the seat cushion 1 with high accuracy.

  FIG. 3 shows an AA cross section of the seat cushion structure of the present invention shown in FIG. The seat cushion structure of the present invention includes a front pressing member 12, a rear pressing member 13, and a frame in addition to the seat cushion 1, the insert member 2, the extending piece 3, the groove portion 5, and the seat back 15 described above. The sheet member 4 is attached on the floor panel 10.

  The seat cushion 1 is formed such that the front of the seat surface is higher than the rear, and has a slope shape that gently descends from the front to the rear and rises again at the rear. A substantially rectangular frame is embedded in the seat cushion 1 for shape retention (not shown). The frame extends to the rear of the seat cushion 1 along the seating surface. The frame end 14 is attached to the rear pressing member 13 outside the seat cushion 1. The seat cushion 1 is attached to the floor panel 10 by a front pressing member 12 on the front side and a rear pressing member 13 on the rear side.

  Although the seat cushion 1 is made of polyurethane, the seat cushion 1 is not limited to this as long as it has the same elasticity as polyurethane.

  The insert member 2 is held in a state of being embedded in the groove portion 5 so as to be separated from the floor panel 10 by the extended piece 3. That is, the insert member 2 and the floor panel 10 are configured to be in a non-contact state.

  FIG. 4 shows a BB cross section of FIG. On both sides of the seat cushion 1, the extending piece 3 s is formed so as to wrap around the lower part of the insert member 2 from the seat cushion 1 member, so that the insert member 2 does not contact the floor panel 10.

  Referring to FIG. 3 again, it is preferable that the insert member 2 is formed so that the floor panel 10 and the insert member 2 are separated from each other by about 10 mm or more. Furthermore, it is preferable that the rear end portion of the insert member 2 held by the extending piece 3 is separated from the floor panel 10 by 20 mm or more, and optimally 30 mm or more. This is because if the two members are separated by such a distance, the insert member 2 will not contact the floor panel 10 even if an occupant gets on the seat cushion 1.

  The insert member 2 is made of a material harder than the seat cushion 1 such as expanded polystyrene (hereinafter referred to as expanded PS) or expanded polypropylene (hereinafter referred to as expanded PP). This is to avoid the occupant's submarine phenomenon at the time of a frontal collision of the vehicle and to reduce the amount of movement of the child seat in the front and lower direction. The material which comprises the insert member 2 will not be limited to this, if it is a material with the elasticity similar to foaming PS and foaming PP.

  The seat cushion 1 in which the insert member 2 is embedded is manufactured by so-called insert molding. Below, the method to manufacture the seat cushion 1 which embedded the insert member 2 by insert molding is demonstrated easily.

  First, the insert member 2 is manufactured in advance using a material such as foamed PS. Next, the insert member 2 is incorporated into the mold of the seat cushion 1, and then polyurethane is injected into the mold in which the insert member 2 is incorporated. Next, after the polyurethane is solidified, the seat cushion 1 in which the insert member 2 is embedded is taken out of the mold to obtain a molded product in which the seat cushion 1 and the insert member 2 are integrated.

  Note that the insert member 2 may be embedded in the seat cushion 1 after the seat cushion 1 and the insert member 2 are manufactured separately.

  The sheet member 4 is interposed between the front end of the insert member 2 and the floor panel 10. Since the sheet member 4 does not rub against the front end of the insert member 2 made of foamed PS or the like and the floor panel 10, it is possible to prevent the generation of abnormal noise. The sheet member 4 is preferably made of a nonwoven fabric or the like as a material. This is because noise such as stick-slip does not occur between the floor panel. Specifically, a nonwoven fabric made from aramid fiber, glass fiber, cellulose fiber, nylon fiber, or the like can be used, but is not limited thereto.

  Even without using the sheet member 4, the floor carpet is drawn to the position of the floor panel 10 corresponding to the front end position of the insert member 2, and the floor carpet is interposed between the insert member 2 and the floor panel 10. Even if it comprises, the effect similar to the above can be show | played.

  If the seat member 4 is replaced with a floor carpet, it is not necessary to form the seat member 4 at the same time when the seat cushion is formed, and a floor carpet extending to the rear edge of the conventional seat cushion 1 is arranged up to the front edge of the seat cushion 1 Therefore, the material cost can be kept low.

  Moreover, according to this embodiment, the front-end part of the insert member 2 to which load is applied to the maximum is installed in the floor panel 10 only through the sheet | seat member 4 (refer FIG. 3). That is, since the seat cushion 1 that is softer than the insert member 2 is not interposed between the front end portion of the insert member 2 and the floor panel 10, the amount of deformation of the seat cushion structure due to the passenger's load can be reduced. In addition, it is possible to avoid an occupant's front slip phenomenon at the time of a front collision and to reduce the amount of movement of the child seat in the front and lower direction.

  Moreover, since the insert member 2 is exposed at the opening portion of the seat cushion 1, the material of the seat cushion 1 can be reduced compared to a case where the insert member 2 is integrally molded so as to cover the entire insert member 2 with the seat cushion 1, Manufacturing costs can be reduced.

  Further, since most of the lower surface of the seat cushion 1 made of foamed PS or the like is exposed, it is easy to set at the time of insert molding and the accuracy can be increased.

  In addition, since there is a gap between the floor panel 10 and the insert member 2, a vehicle-mounted member, wiring, or the like can be installed, or the shape of the floor panel 10 can be given a degree of freedom.

  The extended piece 3 has the same effect even if it is formed on the side portion in addition to the rear portion of the opening edge portion 6. Further, the extended piece 3 may be formed continuously or intermittently along the opening edge 6. Moreover, although the seat cushion 1 is mainly used for a rear seat, an application is not limited only to a rear seat, and may be used for a front seat.

(Embodiment 2)
Next, a second embodiment will be described. The seat cushion structure according to the present embodiment is basically the same as the seat cushion structure according to the first embodiment, and the configuration of the seat cushion 1 is different. For this reason, below, only a different part from the seat cushion structure which concerns on 1st Embodiment is demonstrated.

  FIG. 5 shows the seat cushion structure of the present embodiment. The extending piece 3 is also formed in the front part in addition to the rear part of the opening edge part 6 of the groove part 5, and presses the insert member 2 embedded in the groove part 5 while being separated from the floor panel 10. Yes.

  By configuring in this way, the front end and the rear end of the insert member 2 are embedded in the seat cushion 1 so as not to contact the floor panel 10 by the extended piece 3. That is, since the insert member 2 and the floor panel 10 are in a completely non-contact state, the floor panel 10 and the insert member 2 can be provided without the sheet member 4 interposed between the front end of the insert member 2 and the floor panel 10. It is possible to prevent the generation of abnormal noise due to rubbing.

  Further, since the sheet member 4 is not required, the manufacturing cost can be further reduced and the number of manufacturing steps can be reduced.

(Embodiment 3)
Next, a third embodiment will be described. The seat cushion structure according to the present embodiment is basically the same as the seat cushion structure according to the first embodiment, and the shape of the insert member 2 is different. For this reason, below, only a different part from the seat cushion structure which concerns on 1st Embodiment is demonstrated.

  FIG. 6 shows the seat cushion structure of the present embodiment. The side 2 a facing the floor panel 10 of the insert member 2 enters the bay toward the seat surface direction of the seat cushion 1. Moreover, you may comprise so that the side 2a which faces the floor panel 10 of the insert member 2 may be dented toward the seat surface direction of the seat cushion 1. FIG.

  By comprising in this way, the insert member 2 and the floor panel 10 can be more reliably brought into a non-contact state, and the floor panel 10 and the insert member 2 can be prevented from being rubbed and generating abnormal noise. . In particular, even when a large passenger sits on the seat cushion 1 and a large force is applied to the insert member 2 from above to below, the distance between the insert member 2 and the floor panel 10 is wide. Even if it is distorted to some extent in 10 directions, it is possible to maintain a non-contact state with a predetermined interval or more, so that it is possible to prevent the floor panel 10 and the insert member 2 from rubbing and generating noise.

  In addition, since the side facing the floor panel 10 of the insert member 2 is inserted into the seat cushion 1 in the seating surface direction, the amount of foamed PS and the like used is reduced by the volume of the entry into the bay. Cost can be reduced. Moreover, since the curved surface 2a of the insert member 2 disperses the pressure from above and behind, even if the amount of foamed PS used is small, the effect of high strength can be achieved.

  As described above, the seat cushion structure according to the present invention is in contact with the floor panel 10 on which the insert member 2 formed of a foam material harder than the seat cushion 1 is attached, and generates abnormal noise due to stick slip generated by slight movement. In order to prevent this, the insert member 2 is kept floating from the floor panel 10 by the extended piece 3 provided on the seat cushion 1 and the seat member 4, so that not only abnormal noise can be avoided, but also low cost. Can be realized. In addition, it is possible to avoid an occupant's front slip phenomenon at the time of a front collision and to reduce the amount of movement of the child seat in the front and lower direction.

  It should be noted that the embodiments disclosed herein are illustrative and not restrictive. The scope of the present invention is intended to be within the scope of the claims and their equivalents.

  The present invention can be suitably used for a vehicle seat cushion structure.

DESCRIPTION OF SYMBOLS 1 Seat cushion 2 Insert member 3 Extension piece 4 Sheet member 5 Groove part 6 Opening edge part 10 Floor panel 12 Front pressing member 13 Back pressing member 14 Frame body end 15 Seat back 101 Seat cushion 102 Front slip prevention member 112 Seat cushion Bottom surface portion 113 groove portion 114 receiving portion 115 wire frame 118 holding portion 120 frame body 121 bottom surface portion 151 of slip prevention member seat surface portion 201 seat pad 204 side support portion 220 foam molding 230 supporter material

Claims (1)

It is placed on the floor panel with a sheet member in between,
A groove formed so as to open downward in the front bottom surface of the seat cushion;
The embedded in the groove, a seat cushion structure having a rigid foam material made of the insert member from said seat cushion,
An extending piece extending between the floor panel and the insert member from the opening rear edge of the groove part toward the opening front edge of the groove part,
A sheet member disposed between the insert member and the floor panel around the opening front edge of the groove,
The seat cushion structure, wherein the insert member is not in contact with the floor panel between a rear end of the seat member and a front end of the extended piece.