JP4859195B2 - Seat back frame structure for vehicle seat - Google Patents

Description

  The present invention relates to a seat back frame structure for a vehicle seat disposed in front of a cargo compartment, in particular, a panel frame having a predetermined planar shape, and a frame frame having a planar closed shape disposed and fixed along the front surface of the periphery of the panel frame. It is related with the seat back frame structure which used the combination as a main body.

  For example, in an automobile having a continuous indoor layout of a passenger compartment and a cargo compartment, a seat back of a rear seat disposed in front of the cargo compartment usually functions as a partition. In this case, since there is a possibility that a baggage moved forward under the inertia of an automobile or the like may collide with the back of the seat back, this type of seat back frame (seat back frame) is a panel having a predetermined plane shape. A frame having a relatively high rigidity is generally known as a combination of a frame and a frame frame arranged and fixed along the periphery of the panel frame.

  For example, in a flat vehicle floor in which the rear seat placement surface and the cargo compartment placement surface are almost flat, the luggage in the cargo compartment can be received by the lower frame portion of the seat back frame frame, so that it only resists the impact. Is sufficiently secured in the lower frame portion. However, in a stepped type vehicle floor in which the back of the seatback that has been brought forward is connected flat to the loading surface, there is a risk that the luggage moved forward may directly collide with the panel frame before the lower frame portion. Therefore, there is a concern about the decrease in rigidity.

  Thus, as one of the seat back frame reinforcement structures applicable to such a stepped vehicle floor, for example, one disclosed in Japanese Patent Application Laid-Open No. 2003-235672 is known. This known configuration has a load from a collided baggage by a reinforcing frame constructed between upper and lower frame parts of a frame frame, which has a slanted part formed by bending upper and lower parallel steps at its middle part. It is intended to receive.

  Here, in this known configuration in which a reinforcing frame is installed between the upper and lower frame portions of the frame frame, the reinforcing frame is formed as a form having an oblique portion formed by parallel step bending at an intermediate portion thereof. That is, since the bending at least at two or more places is required for the reinforcing frame, in this known configuration, the manufacturing process for obtaining the reinforcing frame becomes complicated, that is, the workability decreases, and This is accompanied by an increase in costs.

By the way, in above-mentioned Unexamined-Japanese-Patent No. 2003-235672, as a form of a seat back, what is called a 2-part dividing type divided into right and left is materialized as the object. However, as a form of the seat back of the rear seat, there is also a so-called bench seat type in which the left and right are integrated. Since it exists, it is easily expected to be accompanied by a decrease in rigidity at a position outside the skew portion. That is, it can be said that this known configuration is inferior in adaptability to a bench seat type.
JP 2003-235672 A

  The problem to be solved is that the manufacturing process is complicated and the adaptability to the bench seat type is inferior when the conventional reinforcing frame is used.

A seat back frame structure for a vehicle seat according to claim 1 of the present invention is a combination of a panel frame having a predetermined planar shape and a frame frame having a closed planar shape disposed and fixed along the front surface of the periphery of the panel frame. It is a seat back frame structure for a vehicle seat as its main body, and the panel frame is formed as a substantially corrugated panel having at least a plurality of beads extending in the vertical direction, and is arranged substantially parallel to the lower frame portion of the frame frame. In addition, a linear reinforcing frame having a recess formed by crushing the front side thereof at a position corresponding to the seating position is constructed between the left and right frame parts of the frame frame at positions corresponding to the waist, and each end part with respect to the left and right frame parts The straight reinforcing frame is fixed to the panel by fixing the contact surface of the panel frame to the bead of the panel frame. That integrally connected to the frame and frame member, and its most important features.

  In the seat back frame structure for a vehicle seat according to the first aspect of the present invention, since the linear reinforcing frame is arranged substantially in parallel with the lower frame portion of the frame frame, bending or the like with respect to the reinforcing frame becomes unnecessary. That is, since the manufacturing process can be simplified, there is an advantage that the workability can be improved and the cost can be sufficiently reduced.

  And since a reinforcement frame is distribute | arranged to the waist equivalent position, there exists an advantage that the improvement of the seating comfort can be reliably taken by ensuring the high feeling of support with respect to a seated person's waist.

  Further, since the reinforcing frame is fixed to the bead of the panel frame having a substantially corrugated panel in cross section, reinforcement between the reinforcing frame and the panel frame can be obtained. In other words, since the reinforcing frame and the panel frame reinforce each other, when the reinforcing frame is a hollow frame, its thickness and outer diameter can be reduced, and the panel frame thickness can be sufficiently reduced. Become. Therefore, the advantage that the weight and cost can be sufficiently reduced is obtained according to this claim.

In addition, since the concave portion formed by crushing the front side is provided in the reinforcing frame at a position corresponding to the seating position, there is an advantage that a feeling of holding for the seated person is reliably improved.

  The rigidity of the seat back frame that resists the collision of the load is to be increased without complicating the configuration.

  FIG. 1 is a schematic plan view of a seat back frame 10 showing a seat back frame structure of a vehicle seat according to the present invention. As shown in the figure, in this seat back frame structure, a linear reinforcing frame 12 is a seat. The frame frame 14 constituting the back frame 10 is constructed and fixed between the left and right frame portions 14a.

  As can be seen from FIG. 1, the seat back frame 10 forms a skeleton of a bench seat type seat back used as a vehicle seat, specifically a rear seat, and the like, and a panel frame 16 having a predetermined planar shape. And a frame frame 14 having a flat closed shape arranged and fixed along the front surface of the periphery of the panel frame.

  The basic structure itself of this type of seat back frame is known as disclosed in, for example, Japanese Patent Application Laid-Open No. 2003-235672, and the structure itself is not the gist of the present invention. Detailed description is omitted here.

  Here, as shown in FIG. 2, in the present invention, the panel frame 16 is formed as an at least cross-sectional substantially corrugated panel having a plurality of beads 18 extending in the vertical direction. As shown in FIGS. 1 and 2, the linear reinforcing frame 12 arranged substantially parallel to the lower frame portion 14b of the frame frame 14 is located between the left and right frame portions 14a of the frame frame at a position corresponding to the waist of the seated person. The linear reinforcing frame is integrally connected to the panel frame and the frame frame by fixing the end portions to the left and right frame portions and fixing the contact surfaces to the bead 18 of the panel frame. As described above, the seat back frame structure of the present invention is embodied.

  The seated person in this embodiment is assumed to be a general and standard occupant of a Japanese male, but is not necessarily limited to this.

  The end portions of the reinforcing frame 12 are fixed to the left and right frame portions 14b, and the contact surfaces are fixed to the plurality of beads 18 of the panel frame 16, for example, by welding.

  According to such a configuration, it becomes possible to receive the load from the luggage collided from the rear in the reinforcing frame 12 extending in the left-right direction of the seat back frame 10, so that the deformation of the panel frame 16 can be surely prevented. Become.

  Since the linear reinforcing frame 12 is arranged substantially parallel to the lower frame portion 14b of the frame frame, it is not necessary to bend the reinforcing frame. That is, since the manufacturing process for obtaining the reinforcing frame 12 can be simplified, the workability can be improved and the cost can be reduced sufficiently.

  In addition, since the reinforcing frame 12 is disposed at a position corresponding to the waist of the seated person, it is possible to reliably improve the sitting comfort by ensuring a high feeling of support for the seated person's waist.

  Further, since the reinforcing frame 12 is fixed to the bead 18 of the panel frame 16 having a substantially corrugated cross section by welding or the like, reinforcement between the reinforcing frame and the panel frame can be obtained. That is, since the reinforcing frame 12 and the panel frame 16 reinforce each other, when the reinforcing frame is a hollow frame, the thickness and outer diameter thereof can be reduced, and the thickness of the panel frame can be sufficiently reduced. It becomes possible. Accordingly, it is possible to sufficiently reduce the overall weight and cost of the seat back frame 10.

  Here, in the present invention, since the linear reinforcing frame 12 is merely constructed and fixed between the left and right frames 14a of the frame frame, the left and right width of the frame frame 14, that is, the right and left width of the seat back frame 10 is used. It is possible to protect the entire lateral area of the seat back frame from the luggage in the luggage compartment. Therefore, according to this invention, the adaptability to a bench seat type seat back frame is reliably improved.

  Further, since the linear reinforcing frame 12 is merely installed between the left and right frames 14a at a position parallel to the lower frame portion 14b of the frame frame, the entire area in the left and right direction of the seat back frame 10 is used as a protection range. Despite being a frame, its length is minimal. That is, according to this configuration, an increase in weight or the like is reliably suppressed.

  By the way, as shown in FIGS. 1 and 2, in this embodiment, the recess 20 formed by crushing the front side is provided in the reinforcing frame 12 at a position corresponding to the seating position.

  With such a configuration, since the positional deviation of the seated person's upper body in the left-right direction is reliably suppressed, the feeling of holding for the seated person is reliably improved.

  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, the bench seat type seat back frame integrated with the left and right is specifically described. However, the present invention is not limited to this, and the present invention is applied to the seat back of the left and right divided seats. Also good.

1 is a schematic plan view of a seat back frame showing a seat back frame structure of a vehicle seat according to the present invention. It is sectional drawing along line AA of FIG.

Explanation of symbols

10 Seat back frame 12 Reinforcement frame 14 Frame frame 16 Panel frame 18 Bead 20 Recess

Claims (1)

A seat back frame structure for a vehicle seat having a main body of a combination of a panel frame having a predetermined plane shape; and a plane frame having a closed plane shape disposed and fixed along the front surface of the periphery of the panel frame;
The panel frame is formed as at least a substantially corrugated panel having a plurality of beads extending in the vertical direction,
A linear reinforcing frame that is arranged substantially in parallel with the lower frame portion of the frame frame and has a recess formed by crushing the front side thereof at a position corresponding to the seating position is a left and right frame portion of the frame frame at a position corresponding to the waist. The linear reinforcing frame is integrated with the panel frame and the frame frame by fixing the end portions to the left and right frame portions and the contact surfaces of the panel frame to the beads. A seat back frame structure for a vehicle seat characterized by being connected.

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