JP5316182B2 - Seat cushion for vehicle seat - Google Patents

Description

  The present invention relates to a seat cushion for a vehicle seat. More specifically, the present invention relates to a seat cushion for a vehicle seat that includes a support member that supports a pad member having an upper surface as a seat surface, and that supports the load of a seated person by locking the support member to a frame member.

  As this type of seat cushion, there is a conventional seat cushion provided with a plurality of wire-like support members inserted into a pad member as described in Patent Document 1 below. This seat cushion is not considered to make the pad member thinner, but when the pad member is made thinner for the purpose of contributing to the weight reduction of seats which are in high demand these days, the line shape of the support member is changed. There was a possibility that the seated person would be recognized as a foreign body sensation.

  Conventionally, as described in Patent Document 2 below, there is a case in which a cloth-like support member is stretched around a frame member, and a pad member is placed on the support member. In such a seat cushion, since the cloth-like support member supports the pad member in a planar shape, the seat member does not cause a foreign object feeling due to the support member, but if the pad member is thinned, a feeling of bottoming is generated. There was a possibility.

  On the other hand, Patent Literature 3 below discloses a seat cushion that is considered to ensure good sitting comfort even if the pad member is thinned. In this seat cushion, a stretchable face body made of synthetic rubber or the like is provided as a support member. The stretchable face is held by a wire, the front end of the cushion has a convex shape forward, and the position that supports the occupant's buttocks is assembled to the frame member with the convex shape downward. A pad member is placed on the top. In this seat cushion, the support member made of an elastic face piece supports the pad in a surface shape, so that the seated person does not feel a foreign object, and the elastic face piece is three-dimensionally held with a wire. Therefore, it is possible to prevent an unpleasant drop of the buttocks and an unpleasant hit of the front end portion, and it is easy to ensure a good sitting comfort even if the pad member is thin.

Japanese Patent Laid-Open No. 7-155234 Japanese Patent Laid-Open No. 10-327979 JP 2000-316665 A

  However, the seat cushion described in Patent Document 3 also requires at least a process of assembling the support member to the frame member and a process of assembling the pad member to the frame member to which the support member is assembled. There was room for.

  Accordingly, an object of the present invention is to enable assembly of a seat cushion capable of ensuring good sitting comfort even with a lighter pad member with less man-hours.

In order to solve the above problems, the present invention employs the following means.
The present invention is a seat cushion for a vehicle seat that includes a support member that supports a pad member whose upper surface is a seat surface, and that supports the load of a seated person by locking the support member to the frame member.
The support member includes a planar elastic body and locking means capable of locking two opposing sides of the planar elastic body to the frame member, and the pad member is a seated person's seating state in the seated state of the seated person. The pad member is formed to be relatively thick and swelled downward at the buttock position. On the lower surface side of the pad member, the planar elastic body of the support member is foamed along the three-dimensional shape of the pad member. It is characterized by being formed integrally at the time of molding.

  According to the seat cushion of the vehicle seat of the present invention, the pad member is supported by the surface shape of the planar elastic body constituting the support member, so that no foreign object sensation is caused to the seated person. Further, in this seat cushion, the pad member is formed to be relatively thick by inflating downward at the position of the seated person's buttocks in the seated state of the seated person. Here, “relative” means “in comparison with other positions of the same pad member”. Therefore, even when the other position of the pad member is reduced to reduce the weight of the pad member as a whole, a certain amount of pad member thickness can be ensured at the position of the seated person's buttocks. The support member is arranged along the three-dimensional shape in which the pad member bulges by integrating the planar elastic body on the lower surface side of the pad member, so that a so-called bottom feeling is generated for the seated person. It is hard to let you. Therefore, it is easy to ensure good sitting comfort even if the pad member is lightened. Further, since the support member and the pad member are integrated, when the seat cushion is assembled, the pad member is simultaneously assembled to the frame member by locking the support member to the frame member. Therefore, the number of steps required for assembly can be reduced.

  In the present invention, the locking means is a resin locking tool that can be locked to the locking portion of the frame member, and is integrally formed on each of two opposing sides of the planar elastic body. Is preferred. In that case, since the resin-made locking tool is integrally formed with the planar elastic body, the arrangement position of the locking tool on the support member is less likely to vary. Moreover, it is preferable that the resin-made locking tool encloses a metal core. In this case, the shape stability of the locking tool is improved, and the pad member can be supported more stably by the support member.

ADVANTAGE OF THE INVENTION According to this invention, the seat cushion which can ensure the comfort of sitting can be assembled with less man-hours even if a pad member is reduced in weight.
Further, when the locking means is a resin locking tool that can be locked to the locking portion of the frame member, and is integrally formed with the planar elastic body, the positioning position of the locking tool on the support member Variations are unlikely to occur.
Moreover, if the resin-made locking tool contains the metal core, the shape stability of the locking tool is improved, and the pad member can be supported more stably by the support member.

It is a perspective view of the vehicle seat which concerns on Embodiment 1 of this invention. It is a disassembled perspective view which shows the seat cushion of the vehicle seat which concerns on Embodiment 1 of this invention in a partial cross section. It is the III-III sectional view taken on the line of the seat cushion of the vehicle seat shown by FIG. It is a perspective view of the support member concerning Embodiment 1 of the present invention. It is a figure which shows the cross section of the seat cushion of the vehicle seat which concerns on Embodiment 2 of this invention corresponding to FIG. It is a figure which shows the cross section of the seat cushion of the vehicle seat which concerns on Embodiment 3 of this invention corresponding to FIG. It is a disassembled perspective view which shows the seat cushion of the vehicle seat which concerns on Embodiment 3 of this invention in a partial cross section. It is a cross-sectional perspective view which expands and shows the latching state of the front side latching tool in the cushion frame of the vehicle seat which concerns on Embodiment 3 of this invention. It is a perspective view of the supporting member which concerns on Embodiment 3 of this invention.

<Embodiment 1>
Embodiment 1 which is one embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the seat cushion 21 of the present embodiment constitutes a seat 11 that is mounted on a vehicle such as an automobile, together with the seat back 13 and the headrest 15 that become the backrest. In each figure, FR, RR, and UP indicated by arrows indicate the front, rear, and upper sides of the seat cushion 21 defined with reference to the direction viewed from the seated person. In each figure, W indicated by an arrow indicates the width direction of the seat cushion 21.

As shown in FIG. 2, the seat cushion 21 includes a cushion frame 31 that forms a skeleton, and a pad member 23 that forms a seating surface 21a.
The cushion frame 31 includes plate-like frame members (side frames) 33 and 35 disposed on both sides in the width direction W. Both side frames 33 and 35 are connected by a front connecting rod (not shown) and a rear connecting rod 37. A front panel 39 is provided at the front portion of the cushion frame 31 so as to span the upper ends of the side frames 33 and 35. On the front panel 39, a protrusion 39a bulging upward is formed along the width direction at a position where a front locking member 51 of the support member 41 described later is locked. The cushion frame 31 corresponds to the frame member of the present invention.

  The pad member 23 is made of, for example, urethane foam, and the upper surface forms the outer shape of the seating surface 21a, and is covered with a skin material (not shown) along the outer shape. As shown in FIG. 3, the pad member 23 has a bulging portion 25 a formed such that a position for supporting the seated person's buttocks B in a side view bulges downward. In the present embodiment, the bulging portion 25a is formed to swell in an inverted mountain shape, and is formed relatively thick compared to other positions. The pad member 23 is integrally formed with a support member 41 that can be engaged with the cushion frame 31 and can support the pad member 23, thereby forming a pad / support member integrated structure 27.

  As shown in FIG. 4, the support member 41 has a rectangular planar elastic body 43 in a plan view, and a locking tool 51 provided on each of two opposite sides of the four peripheral sides of the planar elastic body 43. 61. In the present embodiment, among the four front and rear left and right sides of the planar elastic body 43, the locking tools 51 and 61 are provided on the two front and rear sides. Hereinafter, for convenience of explanation, the front side locking tool 51 is referred to as a front side locking tool 51, and the rear side locking tool 61 is referred to as a rear side locking tool 61.

  The planar elastic body 43 constituting the support member 41 is a material that can elastically support the pad member 23 in a planar shape, and is made of, for example, a cloth-like material such as a woven fabric or a knitted fabric. As the planar elastic body 43, for example, a woven fabric or a knitted fabric formed of fibers having excellent elasticity such as polyester elastomer can be suitably used. In addition, a woven or knitted fabric imparted with elasticity by a woven or knitted structure can also be suitably used.

  The front locking tool 51 is formed mainly of a resin such as polypropylene, and includes a metal core 53 such as iron. As shown in FIG. 3, the front side locking member 51 is formed as a concave shape having an open bottom that can be fitted to the outside of the protrusion 39 a of the front panel 39. It is provided continuously over the entire length in the width direction of the planar elastic body 43 along the front side of the elastic body 43. The core material 53 is formed by bending a metal plate. By inserting the core material 53 and the front end portion 43 a of the planar elastic body 43 and molding a resin material, the front side locking tool 51 including the core material 53 is provided integrally with the planar elastic body 43. Yes.

  The rear locking member 61 is also formed mainly of a resin such as polypropylene, and includes a metal core 63. As shown in FIG. 3, the rear locking member 61 has a substantially U-shape that can be hooked on the rear connecting rod 37, and as shown in FIG. 4, Along the side, the planar elastic body 43 is continuously provided over the entire length in the width direction. The core material 63 is formed by bending a metal plate. The rear side locking tool 61 is formed by inserting a core material 63 and inserting a rear end portion 43b of the planar elastic body 43 into the upper portion to mold a resin material. Thereby, the rear side locking tool 61 includes the core member 63 and is provided integrally with the planar elastic body 43 so as to be hooked from above with respect to the rear connecting rod 37.

  The pad / support member integrated structure 27 shown in FIG. 2 and the like is formed by the support member 41 being integrated with the pad member 23 when the pad member 23 is foam-molded. That is, the pad / support member integrated structure 27 is formed by foam-molding the pad member 23 in the mold while the support member 41 is held at the position where the pad lower surface of the mold for molding the pad member 23 is molded. Can be formed. As a result, the support member 41 is integrated with the pad member 23 along an inverted chevron shape that swells below the lower surface of the pad member 23 so that the planar elastic body 43 covers the bulging portion 25a of the pad member 23. The front side locking tool 51 and the rear side locking tool 61 are integrated as if they were embedded in the lower surface of the pad member 23.

  As shown in FIG. 2, the seat cushion 21 having such a configuration is configured such that the rear side locking tool 61 is hooked on the rear connecting rod 37 and stopped, and the front side locking tool 51 is fitted to the protrusion 39 a of the front panel 39. The pad / support member integrated structure 27 can be assembled by placing it on the front panel 39.

According to the seat cushion 21 having the above configuration, the following operational effects are obtained.
Referring to FIG. 3, the planar elastic body 43 of the support member 41 is provided integrally with the lower surface of the pad member 23, and is three-dimensionally retained along the three-dimensional shape that swells downward from the pad member 23. Has been. In other words, by providing the planar elastic body 43 integrally with the pad member 23, the pad member 23 is allowed to have a three-dimensional shape that bulges downward. And the position which supports the seating person's buttocks B of the pad member 23 is formed thicker than other positions by providing the bulging part 25a which swells below. Therefore, even if the pad member 23 is lightened as a whole by thinning the other positions of the pad member 23, a certain amount of thickness is secured at the position where the seat occupant B is supported. It is hard to produce a feeling of sticking, and it is easy to ensure good sitting comfort. Further, since the front side locking tool 51 and the rear side locking tool 61 of the support member 41 are reinforced by metal core members 53 and 63, respectively, the shape stability is excellent, and the planar elastic body 43 is seated. Even if an acting force in a direction approaching each other is applied to the front side locking tool 51 and the rear side locking tool 61 by receiving the load, it is difficult to be deformed. Therefore, the pad member 23 can be stably supported and the load on the seated person can be transmitted to the cushion frame 31.
Further, the seat cushion 21 is configured to be able to hook the rear side locking member 61 on the rear connecting rod 37 from the upper side with respect to the cushion frame 31 and to place it on the front panel 39 from above with a pad and support. The member integrated structure 27 can be assembled to the cushion frame 31. In addition, the pad member 23 can be assembled at the same time as the support member 41 is assembled by one process of assembling the pad / support member integrated structure 27 to the cushion frame 31, so that the assembly can be performed with fewer processes.

<Embodiment 2>
Embodiment 2 which is one embodiment of the present invention will be described with reference to FIG. The present embodiment is an embodiment in which, in the first embodiment, the shape of the bulging portion 25b that swells below the pad member 23 is changed to a rectangle in a side view. Portions that do not need to be changed from the first embodiment are denoted by the same reference numerals in the drawing, and detailed description thereof is omitted. Also in this embodiment, there exists an effect similar to the said Embodiment 1. FIG.

<Embodiment 3>
Embodiment 3 which is one embodiment of the present invention will be described with reference to FIGS. In addition, the part which does not require a change from the said Embodiment 1 is shown with the same code | symbol in a figure, and detailed description is abbreviate | omitted. The seat cushion 21 of this embodiment includes a cushion frame 31 and a pad / support member integrated component 77, and the pad / support member integrated component 77 includes a pad member 73 and a support member 81.

  As shown in FIG. 6, the pad member 73 of the present embodiment has a bulging portion 75 formed such that a position supporting the seated person's buttocks B in a side view bulges downward in an inverted plateau shape. The pad member 73 is formed with the bulging portion 75 so that the position for supporting the seated person's buttocks B is relatively thicker than other positions. As shown in FIG. 7, the pad member 73 is integrally formed with a support member 81 that is locked to the cushion frame 31 and can support the pad member 73, and the pad / support member integrated structure 77 is formed. It is made.

  As shown in FIG. 9, the support member 81 includes a planar elastic body 43, a front side locking tool 91, and a rear side locking tool 95. The front side locking tool 91 is formed mainly of a resin such as polypropylene, for example, and includes a metal core 93. The front locking tool 91 has an inclined J shape, and is continuously provided along the front side of the planar elastic body 43 over the entire length in the width direction of the planar elastic body 43. The core material 93 is formed by bending a metal plate. The core material 93 is inserted, and the front end portion 43a of the planar elastic body 43 is inserted into the lower portion so that the resin material is molded, so that the front side locking tool 91 includes the core material 93 and the tip is upward. The sheet elastic body 43 is provided integrally with the warped state.

  The rear side locking tool 95 is also formed mainly of a resin such as polypropylene, for example, and includes a metal core 97. The rear side locking tool 95 is substantially C-shaped that can be hooked on the rear connecting rod 37, and extends along the rear side of the planar elastic body 43 over the entire length in the width direction of the planar elastic body 43. It is provided continuously. The core material 97 is formed by bending a metal plate. The rear locking member 95 is formed by inserting a core material 97 and inserting a rear end portion 43b of the planar elastic body 43 into the upper portion to mold a resin material. As a result, the rear locking member 95 includes the core member 97 and is provided integrally with the planar elastic body 43 so as to be hooked on the rear connecting rod 37 from above.

  As shown in FIG. 7, the support member 81 includes a pad / support, in which the intermediate portion 43 c in the front-rear direction of the planar elastic body 43 is embedded in the bulging portion 75 of the pad member 73 and integrated with the pad member 73. The member integrated structure 77 is formed. The intermediate portion 43 c of the planar elastic body 43 is embedded in the pad member 73 so as to follow the three-dimensional shape of the lower surface 73 b of the pad member 73 at a position close to the lower surface 73 b of the bulging portion 75 of the pad member 73. ing. And the front side latching tool 91 and the rear side latching tool 95 become the form which hung down from the front end surface thru | or the rear end surface of the bulging part 75 of the pad member 73, respectively. In the pad / support member integrated structure 77, the pad member 73 and the support member 81 are formed by embedding the planar elastic body 43 of the support member 41 in the bulging portion 75 of the pad member 73 when the pad member 73 is foam-molded. It is formed integrally.

  As shown in FIG. 8, the front panel 39 of the cushion frame 31 has a locking projection 39b that is formed by cutting downward and bending forward. As shown in FIG. 7, the pad / support member integrated structure 77 holds the rear side locking tool 95 by hooking it on the rear connecting rod 37 and holds the front side locking tool 91 in a state of being placed on the front panel 39. The front panel 39 can be assembled to the cushion frame 31 by being hooked on the locking projection 39b from below and stopped.

According to the seat cushion 21 having the above configuration, the following operational effects are obtained.
The position of the pad member 73 that supports the buttocks B of the seated person is formed thicker than the other positions by the bulging part 75 that bulges downward. Therefore, even if the pad member 23 is lightened as a whole by thinning the other positions of the pad member 73, a certain amount of thickness is secured at the position for supporting the occupant's buttocks B. It is hard to produce a feeling and it is easy to ensure good sitting comfort. Further, since the pad member 73 and the support member 81 are integrally formed in advance as a pad / support member integrated structure 77, the pad member 73 is also assembled at the same time in one process of assembling the support member 81 to the cushion frame 31. Can be assembled easily.

The present invention is not limited to the above-described embodiment, and various other changes can be made without departing from the gist of the present invention.
For example, in the above embodiment, the configuration of the support members 41 and 81 in which the front side and the rear side of the planar elastic body 43 are locked to the cushion frame 31 is illustrated. It is good also as a structure by which 2 sides of the both ends of this width direction are latched with respect to the cushion frame 31. FIG. In that case, for example, it is preferable that the locking member is bent or formed in a divided manner so as to be able to follow the outer shape of the pad member that swells downward.
Further, in the support member, when the locking tool is formed by inserting the end portion of the planar elastic body 43 so as to be integrally formed with the planar elastic body 43, the relative position with respect to the planar elastic body 43 varies. Is preferable in that it is less likely to occur. However, the locking tool can be formed separately from the planar elastic body 43 and can be joined to the planar elastic body 43 later by sewing or the like.

DESCRIPTION OF SYMBOLS 11 Seat 21 Seat cushion 21a Seat surface 23, 73 Pad member 25a, 25b, 75 Expansion part 27, 77 Pad / support member integrated structure 31 Cushion frame 37 Rear part connecting rod 39 Front panel 39a Projection 39b Locking protrusion 41 Support member 43 Planar elastic body 51 Front side locking tool 53 Core material 61 Rear side locking tool 63 Core material 81 Support member 91 Front side locking tool 93 Core material 95 Rear side locking tool 97 Core material

Claims (3)

A seat cushion for a vehicle seat that includes a support member that supports a pad member having an upper surface as a seat surface, and that supports the load of a seated person by locking the support member to a frame member,
The support member includes a planar elastic body and locking means capable of locking two opposing sides of the planar elastic body to the frame member, and the pad member is a seated person's seating state in the seated state of the seated person. The pad member is formed to be relatively thick and swelled downward at the buttock position. On the lower surface side of the pad member, the planar elastic body of the support member is foamed along the three-dimensional shape of the pad member. A seat cushion for a vehicle seat, wherein the seat cushion is formed integrally at the time of molding. The vehicle seat cushion according to claim 1,
The vehicle is characterized in that the locking means is a resin locking device that can be locked to a locking portion of the frame member, and is integrally formed on each of two opposing sides of the planar elastic body. Seat cushion for seats. The vehicle seat cushion according to claim 2,
A seat cushion for a vehicle seat, wherein the resin locking member includes a metal core.

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