JP5508064B2 - Seat back frame - Google Patents

Description

  The present invention relates to a seat back frame.

  Conventionally, a vehicle seat device is formed by supporting a seat pad with a seat back frame and covering the surface with a trim cover. The seat back frame includes a frame main body and a side frame attached to the frame main body. The side frame is provided with a reinforcing member that supports the frame main body from below, and the connection between the side frame and the frame main body is reinforced by the reinforcing member (see, for example, Patent Document 1).

JP 2001-149175 A

However, in the case of the seat back frame described above, the force concentrates on the connecting portion between the reinforcing member and the frame main body, which may cause the seat back frame itself to be deformed.
Therefore, an object of the present invention is to improve the rigidity of the seat back frame.

In order to solve the above problems, a seat back frame according to the invention described in claim 1 is:
The frame body,
A side frame fixed to at least one side of the frame body;
A reinforcing member for connecting the frame body and the side frame;
The frame body is
A pair of upper and lower frames extending in the vertical direction;
A lower frame extending between lower ends of the pair of upper and lower frames,
The side frame is integrally fixed to the upper and lower frames,
The reinforcing member is stretched over the front flange of the side frame and one end of the lower frame, and is welded so as to overlap the front flange, and is integrated with the front flange and the lower frame. It is characterized by being fixed.

The invention according to claim 2 is the seat back frame according to claim 1,
At least one upper and lower frames of the pair of upper and lower frames and one end of the lower frame are fixed integrally,
At the end of the reinforcing member on the lower frame side, a lower frame fixing portion fixed to the lower frame, and a pair of lower frame fixing portions which are arranged above and below the lower frame fixing portion and fixed to the upper and lower frames. And an upper and lower frame fixing portion.

The invention according to claim 3 is the seat back frame according to claim 1 or 2,
The upper end portion of the reinforcing member is provided with an upper flange extending toward the side frame, and the lower end portion of the reinforcing member is provided with a lower flange extending toward the side frame,
The upper flange and the lower flange are arranged between a front flange and a rear flange of the side frame.
The invention according to claim 4 is the seat back frame according to claim 3,
A reclining mechanism for connecting the frame main body to the cushion seat frame together with the side frame,
A hole is formed in the reinforcing member at a position facing the reclining mechanism.
The invention according to claim 5 is the seat back frame according to claim 4,
The holes are sized so that the shaft of the reclining mechanism can pass through.
The invention according to claim 6 is the seat back frame according to claim 4 or 5,
In order to prevent interference between the fixing portion for fixing the reclining mechanism, the upper flange and the lower flange, a gap is formed between the upper flange, the lower flange, and the side frame. It is characterized by being.

  According to the first aspect of the present invention, the reinforcing member is stretched over the front flange of the side frame and one end of the lower frame, and is integrally fixed to the front flange and the lower frame. The side frames and the frame main body can be reinforced more strongly than the case where the frame main body is simply supported from the bottom like the reinforcing material. As a result, the rigidity of the seat back frame can be improved.

  According to the invention of claim 2, since the lower frame fixing portion fixed to the lower frame and the pair of upper and lower frame fixing portions fixed to the upper and lower frames are provided on the reinforcing member, The frame body can be fixed at least at three points. In this way, if the number of connection points is increased as compared with the conventional case, the concentration of force can be dispersed, and higher rigidity can be obtained.

  According to the third aspect of the present invention, since the upper flange and the lower flange of the reinforcing member are provided between the front flange and the rear flange of the side frame, the side frame is formed by the upper flange and the lower flange. The rigidity of the can also be increased.

1 is an overall perspective view showing a frame configuration of a vehicle seat device including a seat back frame according to the present invention. It is a perspective view which shows the right end part vicinity of the lower frame with which the seat back frame of FIG. 1 is equipped. It is a perspective view which shows schematic structure of the side frame with which the seat back frame of FIG. 1 is equipped. It is a perspective view which shows the reinforcement member with which the seat back frame of FIG. 1 is equipped. It is a perspective view which shows the reinforcement member with which the seat back frame of FIG. 1 is equipped. It is a perspective view which shows the reinforcement member with which the seat back frame of FIG. 1 is equipped. It is sectional drawing seen from the VII-VII cutting line in FIG. It is the schematic diagram which showed typically the positional relationship of the front side flange and rear side flange of the side frame of this embodiment, and the upper side flange and lower side flange of a reinforcement member. It is a perspective view which shows the modification of a seat back frame.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. However, although various technically preferable limitations for implementing the present invention are given to the embodiments described below, the scope of the invention is not limited to the following embodiments and illustrated examples.

  FIG. 1 is an overall perspective view showing a frame configuration of a vehicle seat device. As shown in FIG. 1, a vehicle seat device 1 includes a cushion seat frame 2, a seat back frame 3 attached to a rear end portion of the cushion seat frame 2, and a seat rail 4 that slidably supports the cushion seat frame 2. And.

  The seat back frame 3 includes a frame main body 5, side frames 6 fixed to the left and right sides of the frame main body 5, armrest brackets 8 fixed to the left side of the frame main body 5, the frame main body 5 and the side frames. 6 and a reinforcing member 9 that connects the two.

  The frame main body 5 is formed in a substantially rectangular frame shape when viewed from the front by a single pipe member, and between the pair of upper and lower frames 51 and 52 extending in the vertical direction and the upper ends of the pair of upper and lower frames 51 and 52. An upper frame 53 that extends and a lower frame 54 that extends between the lower ends of the pair of upper and lower frames 51 and 52 are provided.

  The upper and lower frames 51 and 52 extend in the vertical direction in parallel with each other. A pair of spring engaging portions 514 with which the spring member 10 is engaged are disposed on the inner side surfaces of the intermediate portions 513 and 523 in the upper and lower frames 51 and 52 at a predetermined interval in the vertical direction.

The upper frame 53 and the lower frame 54 are continuously formed on each of the pair of upper and lower frames 51 and 52. The upper frame 53 is provided with a headrest support portion 531 for detachably supporting a headrest (not shown).
FIG. 2 is a perspective view showing the vicinity of the right end portion of the lower frame 54. As shown in FIG. 2, the right end 541 of the lower frame 54 is fixed to the right upper and lower frames 52. It is most preferable in terms of strength that the right end portion 541 is welded to a position slightly above the lower end of the right upper and lower frames 52 (the hatched portion S1 in FIG. 2 is a welding position). Although not shown, the left and right ends of the lower frame 54 are also fixed to the left and right upper and lower frames 51.

The side frame 6 connects the frame body 5 to the cushion seat frame 2 via the reclining mechanism 12. FIG. 3 is a perspective view showing a schematic configuration of the side frame 6. As shown in FIG. 3, the side frame 6 is formed so as to project forward from the middle part 523 to the lower part of the upper and lower frames 52. A front flange 61 that extends inwardly is formed at the front end of the side frame 6, and a rear flange 62 that extends inward also at the rear end of the side frame 6. Is formed.
Further, a reclining mechanism hole 65 for attaching the reclining mechanism 12 is provided in a region of the side frame 6 that faces the lower part of the right upper and lower frames 52.

Next, the reinforcing member 9 will be described. In the following description, the reinforcing member 9 attached to the right side of the frame body 5 will be described as an example, but the same applies to the reinforcing member attached to the left side.
4 to 6 are perspective views of the reinforcing member 9 viewed from various angles. The reinforcing member 9 is stretched over the front flange 61 of the side frame 6 and the right end portion of the lower frame 54, and is integrally fixed to the front flange 61 and the lower frame 54. Specifically, the reinforcing member 9 is integrally provided with a main body 91, a lower frame fixing portion 92, and a pair of upper and lower frame fixing portions 93 and 94.
The main body 91 extends in the front-rear direction, and its front end engages with the front flange 61 of the side frame 6 and is welded (shaded portion S2 in FIG. 5). 7 is a cross-sectional view taken along the line VII-VII in FIG. As shown in FIG. 7, since the front flange 61 and the front end of the main body 91 are welded in an overlapping state, the rigidity is increased. In addition, if the front flange 91 is widened and the overlapping portion with the front end of the main body 91 is enlarged, the rigidity can be further increased.
Also, as shown in FIGS. 4 to 6, a jig positioning hole 911 a is formed in the main body 91. The positioning hole 911 a is formed at a position facing the reclining mechanism 12. The hole 911a is preferably sized so that the shaft (not shown) of the reclining mechanism 12 can pass through. If it is this size, when attaching the reclining mechanism 12, the shaft of the said mechanism can be installed through the hole 911a. In addition, the mounting state of the reclining mechanism 12 can be visually confirmed by the hole 911a.
An upper flange 912 that extends toward the side frame 6 is provided at the upper end of the main body 91, and a lower flange 913 that extends toward the side frame 6 is provided at the lower end of the main body 91. Is provided. The upper flange 912 and the lower flange 913 are disposed between the front flange 61 and the rear flange 62 of the side frame 6. Further, a gap is formed between the upper flange 912 and the lower flange 913 and the inner surface of the side frame 6. The gap prevents the fixing portion 121 for fixing the reclining mechanism 12 from interfering with the upper flange 912 and the lower flange 913. As long as the reclining mechanism 12 can be fixed, the fixing part 121 may be a fixing tool such as a rivet or may be welding.

The lower frame fixing portion 92 extends inward from the rear end portion of the main body portion 91 and is fixed to the lower frame 54. A jig positioning hole 911 b is formed at a position facing the lower frame 54 in the lower frame fixing portion 92. Thus, by providing a plurality of positioning holes 911a and 911b, a fixing jig or the like can be engaged in the holes 911a and 911b during welding, and the reinforcing member 9 can be stably attached. Can be held.
The lower frame fixing portion 92 includes an upper side wall portion 921 and a lower side wall portion 922 that extend rearward. The upper side wall portion 921 and the lower side wall portion 922 form a lower frame. 54 is clamped up and down. The lower side wall portion 922 is welded to the lower frame 54 (shaded portion S3 in FIG. 6). A reinforcing bead 95 is formed from the lower frame fixing portion 92 to the main body portion 91.

The upper and lower frame fixing portions 93 and 94 are disposed above and below the lower frame fixing portion 92. The upper upper and lower frame fixing portion 93 is formed continuously with the upper side wall portion 921 and the upper flange 912, and is welded to the upper and lower frame 52 (shaded portion S4 in FIG. 5). The lower upper and lower frame fixing portion 94 is formed continuously with the lower side wall portion 922 and the lower flange 913, and is welded to the upper and lower frame 52 (shaded portion S5 in FIG. 6).
Further, the front end portion of the lower frame fixing portion 92 is welded to the lower frame 54 (shaded portion S6 in FIG. 4).

  As described above, according to the present embodiment, the reinforcing member 9 is stretched over the front flange 61 of the side frame 6 and one end of the lower frame 54, and integrated with the front flange 61 and the lower frame 54. Therefore, the side frame 6 and the frame main body 5 can be reinforced more strongly than when the frame main body is simply supported from the bottom like a conventional reinforcing material. Thereby, the rigidity of the seat back frame 3 can be improved.

Further, since the lower frame fixing portion 92 fixed to the lower frame 54 and the pair of upper and lower frame fixing portions 93 and 94 fixed to the upper and lower frames 52 are provided in the reinforcing member 9, The frame body 5 can be fixed at least at three points. In this way, if the number of connection points is increased as compared with the conventional case, the concentration of force can be dispersed, and higher rigidity can be obtained.
Further, since the upper flange 912 and the lower flange 913 of the reinforcing member 9 are provided between the front flange 61 and the rear flange 62 of the side frame 6, the side frame is formed by the upper flange 912 and the lower flange 913. The rigidity of 6 can also be increased.
FIG. 8 is a schematic diagram schematically showing the positional relationship between the front flange 61 and the rear flange 62 of the side frame 6 and the upper flange 912 and the lower flange 913 of the reinforcing member 9. As shown in FIG. 8, since the upper flange 912 and the lower flange 913 of the reinforcing member 9 are disposed between the front flange 61 and the rear flange 62, the side frame 6 and the reinforcing member 9 can be made compact. can do.

The embodiments to which the present invention can be applied are not limited to the above-described embodiments, and can be appropriately changed without departing from the spirit of the present invention.
For example, in the present embodiment, a case where the side frame 6 is attached only to the right upper frame 52 out of the pair of upper and lower frames 51, 52 is described as an example. It is also possible to attach the side frame 6. In that case, if the reinforcing member 9 is also installed corresponding to both the upper and lower frames 51 and 52, it can be reinforced more firmly.
Further, the upper and lower frames 51 and 52 and the lower frame 54 can be divided and the upper and lower frames 51 and 52 can be fixed only to the upper portion of the side frame 6 as shown in FIG. In this case, the side frame 6 and the reinforcing member 9 are attached to the lower frame 54.

DESCRIPTION OF SYMBOLS 1 Vehicle seat apparatus 2 Cushion seat frame 3 Seat back frame 4 Seat rail 5 Frame main body 6 Side frame 8 Armrest bracket 9 Reinforcing member 51 Upper and lower frame 52 Upper and lower frame 53 Upper frame 54 Lower frame 61 Front flange 62 Rear flange 91 Main body Part 92 Lower frame fixing part 93 Upper and lower frame fixing part 93 Upper and lower frame fixing part 94 Upper and lower frame fixing part 95 Bead 912 Upper flange 913 Lower flange

Claims (6)

The frame body,
A side frame fixed to at least one side of the frame body;
A reinforcing member for connecting the frame body and the side frame;
The frame body is
A pair of upper and lower frames extending in the vertical direction;
A lower frame extending at the lower end of the pair of upper and lower frames,
The side frame is integrally fixed to the upper and lower frames,
The reinforcing member is stretched over the front flange of the side frame and one end of the lower frame, and is welded so as to overlap the front flange, and is integrated with the front flange and the lower frame. A seat back frame characterized by being fixed. In the seat back frame according to claim 1,
At least one upper and lower frames of the pair of upper and lower frames and one end of the lower frame are fixed integrally,
At the end of the reinforcing member on the lower frame side, a lower frame fixing portion fixed to the lower frame, and a pair of lower frame fixing portions which are arranged above and below the lower frame fixing portion and fixed to the upper and lower frames. A seat back frame comprising a fixing portion for upper and lower frames. In the seat back frame according to claim 1 or 2,
The upper end portion of the reinforcing member is provided with an upper flange extending toward the side frame, and the lower end portion of the reinforcing member is provided with a lower flange extending toward the side frame,
The upper flange and the lower flange are disposed between a front flange and a rear flange of the side frame.   The seat back frame according to claim 3,
  A reclining mechanism for connecting the frame main body to the cushion seat frame together with the side frame,
  A seat back frame, wherein a hole is formed at a position of the reinforcing member facing the reclining mechanism.   The seat back frame according to claim 4,
  The seat back frame according to claim 1, wherein the hole has a size that allows the shaft of the reclining mechanism to pass therethrough.   In the seat back frame according to claim 4 or 5,
  In order to prevent interference between the fixing portion for fixing the reclining mechanism, the upper flange and the lower flange, a gap is formed between the upper flange, the lower flange, and the side frame. A seat back frame characterized by being.

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