JP4859196B2 - Seat cushion frame structure for vehicle seat - Google Patents

Description

  The present invention relates to a seat cushion frame structure for a vehicle seat that can prevent a submarine phenomenon in an emergency such as a collision, and more particularly to a seat cushion frame structure using a panel frame at least in a seating target area.

  The butt portion of a seated person wearing a seat belt exhibits a so-called submarine phenomenon that slips forward while submerging in an emergency such as a collision. Thus, in a seat cushion frame using a panel frame (also referred to as a pan frame) as a seating target area, as a countermeasure against submarine, for example, in the latter half as disclosed in Japanese Patent Publication No. 6-500012 There is known a configuration in which a high step portion for preventing submarine is provided in front of a prescribed lower butt receiving portion through a predetermined rear inclined surface.

  According to such a so-called submarine-preventing panel frame, forward slipping of the seated person's buttocks forward in the event of an emergency such as a collision is regulated and prevented by the high-stage part in front of the lower buttocks receiving part. Therefore, the submarine phenomenon can be sufficiently prevented.

  Here, in the configuration in which the forward slip of the seat occupant's butt is regulated and prevented by the high step of the panel frame, an excessive load from the normal time acts on the stairs from the seat butt. Therefore, in this type of configuration, the panel frame needs to have a rigidity sufficient to withstand this excessive load. Therefore, this is usually dealt with by setting the thickness of the panel frame to a thickness sufficient to obtain its rigidity.

By the way, in order to reduce the weight of the seat cushion frame having such a panel frame, it is first considered to reduce the thickness of the panel frame. However, in a panel frame having a high step for preventing submarine (submarine countermeasure type panel frame), the rigidity itself is reduced as the plate thickness is reduced. It cannot be denied that the used seat cushion frame is an obstacle to reducing the weight.
Japanese Patent Publication No. Hei 6-500022

  The problem to be solved is that when the thickness of the panel frame is reduced, the rigidity itself is lowered.

The seat cushion frame structure for a vehicle seat according to claim 1 of the present invention includes a combination of a flat frame frame that forms a skeleton of the seat cushion and a panel frame having a predetermined flat shape arranged at least in a seating target area. The seat cushion frame structure of the vehicle seat as the main body, the panel frame is formed in an integrated submarine prevention shape having a high step portion in front of the lower butt receiving portion, and the frame frame is It has at least a front horizontal frame portion, a rear horizontal frame portion, and an intermediate horizontal frame portion on which the panel frame can be placed. The lower bent piece provided at the front end of the high step portion is placed on and fixed to the front horizontal frame portion, and the rear end portion of the lower butt receiving portion is placed on and fixed to the rear horizontal frame portion. By mounting and fixing the front end of the lower butt receiving portion to the horizontal frame, the panel frame is integrally assembled to the frame frame, and the lower bent piece of the front end of the high step is formed on the rear surface of the panel frame. And a stiffening member made of a bent bar material at each end portion between the lower bent bottom piece and the curved rear inclined surface extending rearward from the high step portion and continuing to the lower butt receiving portion. by welding of the bent end for the rear surface of the curved rear inclined surface, it is integrally bridged, that it has been fixed, the most important features in the claim 1.

  According to the seat cushion frame structure for a vehicle seat according to claim 1 of the present invention, the lower bent piece at the front end of the high step portion and the curved rear inclined surface extending rearward from the high step portion are integrated. Since the stiffening member erected and fixed to the frame receives an excessive load from the seat butt that slides forward, stiffening without depending on the thickness of the panel frame is sufficiently possible. In other words, even if the panel frame thickness is lowered, the rigidity at the high step portion can be sufficiently secured.Therefore, it is possible to sufficiently reduce the weight of the seat cushion frame by reducing the panel frame thickness. can get.

Further, since the bar material is embodied as a stiffening member, there is an advantage that the panel frame can be stiffened without complicating its configuration.

  Submarine countermeasure panel frame can be made thinner without complicating the structure.

  FIG. 1 and FIG. 2 are a schematic longitudinal sectional view of a seat cushion frame 10 showing a seat cushion frame structure of a vehicle seat according to the present invention, and a schematic plan view of a partly broken view thereof. In the frame structure, the seat cushion frame is formed with a combination of the panel frame 12 and the frame frame 14 as its main body.

  This panel frame (also referred to as a pan frame) 12 is formed into a concavo-convex shape having a plurality of reinforcing beads, for example, from a steel plate or the like, for example, as a planar shape substantially the same as a seating target area in a seat cushion. It is formed by. The panel frame 12 is integrally connected to and fixed to the frame frame 14 by, for example, placing the front end portion, the rear end portion, and the intermediate portion thereof on the frame frame 14, welding, and the like.

  The seating target area in the seat cushion referred to here is a seat that supports a region from the bottom of the seated person to the bottom of the thigh when a seated person (Japanese adult male) of a standard body type is seated on the vehicle seat. Although it is intended to point to the cushion region, the target seated person is not necessarily limited to this.

  Here, the seat cushion frame 10 of a seat cushion having seating areas at least on the left and right sides of two or three people is illustrated.

  As disclosed in JP-A-6-500022, the use of a panel frame for the seat cushion frame is known per se, and the use of the panel frame for the seat cushion frame itself is not the gist of the present invention. Detailed description of the basic configuration of the seat cushion frame using the panel frame will be omitted here.

  Here, as shown in FIG. 1, in the present invention, as a countermeasure against submarine, the panel frame 12 is continuously connected to the front of the lower butt receiving portion 12a defined in the latter half portion via a curved rear inclined surface 12b. The front horizontal frame portion that is integrally formed with the high step portion 12c and that allows the frame frame 14 to place and fix the lower bent piece 12d provided at the front end of the high step portion of the panel frame. 14a, at least the rear horizontal frame portion 14b that allows the rear end portion of the lower butt receiving portion 12a to be placed and fixed, and the intermediate horizontal frame portion 14c that allows the front end portion of the lower butt receiving portion to be set and fixed. It is formed. Then, by placing the frame frame 14 on the corresponding part and fixing it by welding or the like, the panel frame 12 is assembled to the frame frame, and as can be seen from FIG. 2 in addition to FIG. In the present invention, a predetermined stiffening member 16 is provided between the lower bent piece 12d at the front end of the high step portion 12c and the curved rear inclined surface 12b extending rearward from the high step portion on the back surface of the panel frame. Is integrally constructed and fixed.

  As the stiffening member 16, for example, a bent bar of each end 16a can be exemplified, and each bent end 16a with respect to the back surface of the lower bent piece 12d of the panel frame and the curved rear inclined surface 12b. By this welding, the stiffening member as the bar is integrally constructed and fixed between the lower bent piece of the panel frame and the back surface of the curved rear inclined surface.

  As can be seen from FIG. 2, the stiffening members 16 are disposed at symmetrical positions of the panel frame 12, for example.

  In such a configuration, the load received by the curved rear inclined surface 12b is released from the lower bent piece 12d to the frame frame 14 via the stiffening member 16, and therefore the high step portion 12c of the panel frame. The rigidity is reliably increased.

  Further, in this seat cushion frame structure, since the front end portion of the lower butt receiving portion 12a of the panel frame is placed and fixed on the intermediate horizontal frame portion 14c of the frame frame, the normal load from the seated person and It is also possible to receive an excessive load in an emergency such as a collision at the intermediate lateral frame portion.

  That is, by providing the stiffening member 16 and the intermediate horizontal frame portion 14c of the frame frame together, even if the thickness of the panel frame 12 is reduced, it can only resist an excessive load in an emergency such as a collision. It is possible to ensure the rigidity of the panel frame. Thus, according to the present invention, the weight of the panel frame 12 is reduced, that is, the weight of the seat cushion frame 10 itself is reduced, and at the same time, the cost of the seat cushion frame is sufficiently reduced. It becomes possible.

  Further, since the bar exemplified here is used as the stiffening member 16, it is only necessary to integrally construct and fix the lower bent piece 12d of the panel frame and the back surface of the curved rear inclined surface 12b. It is not accompanied by.

  Here, in this embodiment, a bar is used as the stiffening member 16, but it is sufficient if it has sufficient rigidity to receive an excessive load in an emergency such as a collision. For example, a longitudinal plate provided with a reinforcing bead or the like may be used as the stiffener. However, if the bar member is the stiffening member 16, it is only necessary to bend each end, so that the panel frame 12 can be easily stiffened without complicating its configuration.

  In addition, a rod material here shall not ask | require hollow and solid.

  The above-described embodiments are for explaining the present invention, and are not intended to limit the present invention. All modifications, alterations, etc. within the technical scope of the present invention are included in the present invention. Needless to say.

  In this embodiment, a two-seat or three-seat seat cushion frame is specifically described. However, the present invention is not limited to this, and the present invention is applied to a seat cushion frame of a one-seat seat. May be.

It is a schematic longitudinal cross-sectional view of the seat cushion frame which shows the seat cushion frame structure of the vehicle seat which concerns on this invention. 1 is a schematic plan view of a part of a seat cushion frame showing a seat cushion frame structure of a vehicle seat.

Explanation of symbols

10 Seat cushion frame 12 Panel frame 14 Frame frame 16 Stiffening member (bar)

Claims (1)

A seat cushion frame structure for a vehicle seat having a main body of a combination of a frame frame having a plane-closed shape forming a skeleton of a seat cushion; and a panel frame having a predetermined plane shape disposed at least in a seating target area;
The panel frame is formed in an integrated submarine prevention shape having a high step portion in front of the lower butt receiving portion, and the frame frame has a front horizontal frame portion on which the panel frame can be placed, and a rear frame portion. Formed with at least a horizontal frame portion and an intermediate horizontal frame portion,
Placement and fixing of the lower bent piece provided at the front end of the high step portion to the front horizontal frame portion, and placement, fixation and intermediate horizontal frame of the rear end portion of the lower stage bottom receiving portion to the rear horizontal frame portion The panel frame is integrally assembled with the frame frame by placing and fixing the front end of the lower butt receiving portion to the portion, and the lower end of the front end of the high step portion is folded at the back of the panel frame. A stiffening member made of a bent bar at each end is bent downward between the bent piece and a curved rear inclined surface extending rearward from the high step portion and continuing to the lower butt receiving portion. A seat cushion frame structure for a vehicle seat that is integrally constructed and fixed by welding each bent end to a back surface of a piece and a curved rear inclined surface .

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