Side frame

Abstract

To provide a side frame which can suppress deformation of the side frame.SOLUTION: A side frame 5 comprises: a frame body 51; and a reinforcement plate 52. An inclined part 52A of the reinforcement plate 52 is surrounded by the frame body 51. The side frame 5 is given in which a tip of the inclined part 52A contacts, before the frame body 51 is largely deformed, with a second plate part 51B. Therefore, deformation of the frame body 51 is, after the tip of the inclined part 52A contacts with the second plate part 51B, inhibited by the second plate part 51B so that large deformation of the frame body can be suppressed.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present disclosure relates to a side frame for a back frame. [Background technology]

[0002] For example, in the invention described in Patent Document 1, one side frame is formed by stacking two panel frames having an approximately C-shaped or U-shaped cross-sectional shape with one side open in the seat width direction. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2018-162032 Summary of the Invention [Problem to be solved by the invention]

[0004] The present disclosure discloses an example of a side frame that can suppress deformation of the side frame from a different perspective than the side frame described in Patent Document 1. [Means for solving the problem]

[0005] The side frame that constitutes a part of the back frame (3) of the seat back preferably has at least one of the following constituent features. That is, the constituent elements are a first plate portion (51A) that is approximately perpendicular to the seat width direction, a second plate portion (51B) that is arranged at a position spaced apart from the first plate portion (51A) in the seat width direction, the second plate portion (51B) that is approximately perpendicular to the seat width direction, a third plate portion (51C) that connects the front end side of the first plate portion (51A) in the seat front-rear direction and the front end side of the second plate portion (51B) in the seat front-rear direction, a reinforcing plate (52) joined to the surface of the first plate portion (51A) that faces the second plate portion (51B), and an inclined portion (52A) provided on the front end side of the reinforcing plate (52) in the seat front-rear direction, the inclined portion (52A) being inclined with respect to the first plate portion (51A) so that the front end side of the seat front-rear direction is positioned on the side of the second plate portion (51B). Hereinafter, the first plate portion (51A), the second plate portion (51B), and the third plate portion (51C) will be referred to as a frame main body.

[0006] The inclined portion (52A) is surrounded by the frame main body (51). As a result, in the side frame, the tip of the inclined portion (52A) comes into contact with the second plate portion (51B) before the frame main body (51) is significantly deformed.

[0007] Therefore, after the tip of the inclined portion (52A) comes into contact with the second plate portion (51B), the second plate portion (51B) inhibits deformation of the frame main body (51), thereby preventing the frame main body from deforming further.

[0008] Furthermore, since the inclined portion (52A) is inclined relative to the first plate portion (51A), it may be possible to increase the cross-sectional area and bending rigidity (second moment of area) of the inclined portion (52A) without increasing the seat fore-and-aft dimension of the frame body compared to a configuration in which the inclined portion (52A) is straight.

[0009] The side frame may have the following configuration, for example. That is, it is desirable that the seat front-rear dimension of the second plate portion (51B) is smaller than the seat front-rear dimension of the first plate portion (51A), and furthermore, that an opening (51F) exposing the reinforcing plate (52) is provided rearward of the seat front-rear rear end side of the second plate portion (51B).

[0010] This allows an assembly worker (including an automatic assembly machine) to view the first plate portion 51A through the opening 51F, thereby facilitating assembly of the reinforcing plate 52 including the inclined portion 52A to the first plate portion 51A. This in turn improves assembly workability and can prevent a decrease in yield due to assembly defects.

[0011] In addition, the seat is provided with a fourth plate portion (51D) extending in the seat width direction from the rear end side of the first plate portion (51A) in the seat front-rear direction, and a flange portion (52B) extending in the seat width direction from the rear end side of the reinforcing plate (52) in the seat front-rear direction, and it is desirable that the seat width direction dimension of the fourth plate portion (51D) and the seat width direction dimension of the flange portion (52B) be larger than the seat width direction dimension of the third plate portion (51C).

[0012] Furthermore, it is desirable that the first plate portion (51A) and the reinforcing plate (52) each have a through hole penetrating in the thickness direction, and that the reinforcing plate (52) be joined to the first plate portion (51A) in a state in which the through hole (51C) of the first plate portion (51A) and the through hole (51G) of the reinforcing plate (52) are aligned.

[0013] In this configuration, it is desirable that, during the assembling operation, the assembling worker position the reinforcing plate 52 relative to the first plate portion 51A by inserting pins into the through-hole 51C of the first plate portion 51A and the through-hole 51G of the reinforcing plate 52. This enables the assembling worker to easily assemble the reinforcing plate 52 to the first plate portion 51A.

[0014] Incidentally, the symbols in each of the parentheses above are examples showing the correspondence with the specific configurations, etc. described in the embodiments described below, and the present disclosure is not limited to the specific configurations, etc. shown by the symbols in the parentheses above. [Brief explanation of the drawings]

[0015] [Figure 1] FIG. 2 is a diagram showing a back frame according to the first embodiment. [Figure 2] FIG. 2 is an exploded view of the side frame according to the first embodiment. [Figure 3] FIG. 2 is a view showing a side frame according to the first embodiment. [Figure 4] FIG. 2 is a cross-sectional view of the side frame according to the first embodiment. [Figure 5] 5A to 5C are diagrams showing the assembly process. [Figure 6] FIG. 10 is a cross-sectional view of a side frame according to a second embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0016] The following "embodiments of the invention" are examples of embodiments that fall within the technical scope of the present disclosure. In other words, the invention-specific matters described in the claims are not limited to the specific configurations and structures shown in the following embodiments.

[0017] This embodiment is an example in which a seat back according to the present disclosure is applied to a seat (hereinafter referred to as a vehicle seat) installed in a vehicle such as a car. Arrows and diagonal lines indicating directions are added to each figure to make it easier to understand the relationship between the figures and the shapes of components or parts.

[0018] Therefore, the seat back is not limited to the direction indicated in each drawing. The direction indicated in each drawing is the direction when the vehicle seat according to this embodiment is assembled to a vehicle. Diagonally shaded drawings do not always represent cross-sectional views.

[0019] At least one of each member or portion described with a reference numeral is provided unless otherwise specified, such as "one." In other words, unless otherwise specified, two or more members may be provided. The seat backs shown in the present disclosure include at least one of the components, such as the members or portions, described with reference numerals, and the structural portions shown in the drawings.

[0020] (First embodiment) <1. Seatback Overview> The seat back 1 shown in Fig. 1 is a seat back for a rear seat. The seat back 1 is attached to a vehicle and supports the back of a seated occupant. The seat back 1 includes at least a back frame 3 and a back cushion (not shown).

[0021] The back frame 3 is a strength member that forms the framework of the seat back 1. The back cushion is a cushioning material that is arranged on the front side of the back frame 3. The surface of the back cushion is covered with a cover (not shown) or the like.

[0022] The back frame 3 is configured to have a frame frame 3A, a panel frame 3B, etc. The frame frame 3A forms a rectangular frame-like skeleton. The frame frame 3A has an upper frame 4, a side frame 5, etc.

[0023] The upper frame 4 and the side frames 5 are members that form part of the back frame 3. The upper frame 4 is a strength member that extends in the seat width direction at the upper end side of the back frame 3.

[0024] The side frames 5 are members that extend vertically and have their upper ends joined to the upper frame 4. The back panel 7 is a plate-shaped member that constitutes the panel frame 3B. The back panel 7 is joined to the frame 3A from the rear side.

[0025] <2. Details of the side frame> 2, the side frame 5 is configured to include a frame main body 51 and a reinforcing plate 52. The reinforcing plate 52 is joined to the frame main body 51 at multiple points.

[0026] The first plate portion 51A is provided with a through-hole 51G penetrating in the thickness direction. The reinforcing plate 52 is provided with a through-hole 52C penetrating in the thickness direction. The frame main body 51 and the reinforcing plate 52 are joined to each other by welding with the through holes 51G and 52C aligned. Incidentally, the symbol W in Figures 1 and 3 indicates the welded portion between the frame main body 51 and the reinforcing plate 52.

[0027] 4, the frame main body 51 has a first plate portion 51A to a fourth plate portion 51D, etc. The frame main body 51 is formed by integrally molding the first plate portion 51A to the fourth plate portion 51D by applying plastic processing to a rolled steel plate such as SPHC.

[0028] The first plate portion 51A is a plate-shaped portion that is substantially perpendicular to the seat width direction. The second plate portion 51B is a plate-shaped portion that is disposed at a position spaced apart from the first plate portion 51A in the seat width direction (to the right in this embodiment) and is substantially perpendicular to the seat width direction.

[0029] The third plate portion 51C is a plate-shaped portion that connects the front end side of the first plate portion 51A in the seat front-rear direction with the front end side of the second plate portion 51B in the seat front-rear direction. The plate surface of the third plate portion 51C is approximately perpendicular to the seat front-rear direction. The fourth plate portion 51D is a plate-shaped portion that extends in the seat width direction from the rear end side of the first plate portion (51A) in the seat front-rear direction.

[0030] The reinforcing plate 52 is a plate-shaped portion joined to the surface of the first plate portion 51A on the second plate portion 51B side. An inclined portion 52A is provided on the front end side of the reinforcing plate 52 in the seat front-rear direction.

[0031] The inclined portion 52A is a portion inclined with respect to the first plate portion 51A so that the front end side in the seat front-rear direction is located on the second plate portion 51B side. A flange portion 52B is provided on the rear end side in the seat front-rear direction of the reinforcing plate 52. The flange portion 52B is a portion extending from the rear end side in the seat width direction (to the right in this embodiment).

[0032] The inclined portion 52A and the flange portion 52B are formed as an integral part of the reinforcing plate 52 by plastically processing a rolled steel plate and molding it together with the reinforcing plate 52. Hereinafter, unless otherwise specified, the inclined portion 52A and the flange portion 52B will be collectively referred to as the reinforcing plate 52.

[0033] The inclined portion 52A is housed within and surrounded by a substantially U-shaped or C-shaped portion 51E formed by the first plate portion 51A, the second plate portion 51B, and the third plate portion 51C.

[0034] The seat front-rear dimension of the second plate portion 51B is smaller than the seat front-rear dimension of the first plate portion 51A, and the seat front-rear direction rear end of the second plate portion 51B is not connected to the fourth plate portion 51D.

[0035] That is, an opening 51F is provided rearward of the rear end of the second plate portion 51B in the seat front-rear direction, exposing the reinforcing plate 52. Therefore, an assembly worker (including an automatic assembly machine) can view the first plate portion 51A side through the opening 51F.

[0036] The seat width direction dimension of the fourth plate portion 51D and the seat width direction dimension of the flange portion 52B are larger than the seat width direction dimension of the third plate portion 51C. This is to prevent interference between the seat occupant and the side frame 5 while increasing the cross-sectional moment of the side frame 5.

[0037] <3. Features of the side frame according to this embodiment> <Structural features> The inclined portion 52A of the reinforcing plate 52 according to this embodiment is surrounded by the frame main body 51 (see FIG. 4). As a result, in the side frame 5, the tip of the inclined portion 52A comes into contact with the second plate portion 51B before the frame main body 51 is significantly deformed.

[0038] Therefore, after the tip of the inclined portion 52A comes into contact with the second plate portion 51B, the deformation of the frame main body 51 is hindered by the second plate portion 51B, so that the frame main body can be prevented from deforming further.

[0039] Furthermore, since the inclined portion 52A is inclined relative to the first plate portion 51A, it may be possible to increase the cross-sectional area and bending rigidity moment of inertia of the inclined portion 52A without increasing the seat fore-and-aft dimension of the frame main body 51 compared to a configuration in which the inclined portion 52A is straight.

[0040] An opening 51F is provided behind the rear end of the second plate portion 51B in the seat front-rear direction, exposing the reinforcing plate 52, so that an assembly worker can view the first plate portion 51A side through the opening 51F.

[0041] This allows the reinforcing plate 52 including the inclined portion 52A to be easily assembled to the first plate portion 51 A. This in turn improves the efficiency of assembly work and can prevent a decrease in yield due to assembly defects.

[0042] <Features during assembly work> During the assembly work, the assembly worker can position the reinforcing plate 52 relative to the first plate portion 51A by inserting a pin P into the through hole 51C of the first plate portion 51A and the through hole 51G of the reinforcing plate 52, as shown in Figures 5A to 5C.

[0043] That is, in the initial stage of the assembly work, as shown in Fig. 5A, pin P serving as a positioning jig is inserted into through hole 51C of frame main body 51. Next, as shown in Fig. 5B, the assembly worker attaches reinforcing plate 52 to frame main body 51 with inclined portion 52A as the rotation center.

[0044] 5C, the through-hole 51G of the reinforcing plate 52 is guided by the tapered portion P1 of the pin P and fits into the cylindrical portion P2 of the pin P. This allows the assembly worker to easily position and assemble the reinforcing plate 52 to the frame main body 51.

[0045] (Second embodiment) As shown in Fig. 6, the side frame 5 according to this embodiment does not have an opening 51F. That is, the frame main body 51 has a substantially rectangular closed cross-sectional shape. Note that the same components as those in the above-described embodiment are denoted by the same reference numerals. Therefore, in this embodiment, redundant explanations will be omitted.

[0046] (Other embodiments) The side frame 5 according to the above-described embodiment is a side frame used in a rear seat. However, the present disclosure is not limited to this. That is, the present disclosure is also applicable to, for example, a side frame for a front seat.

[0047] In the above-described embodiment, the reinforcing plate 52 can be positioned relative to the first plate portion 51A by inserting the pin P into the through hole 51C of the first plate portion 51A and the through hole 51G of the reinforcing plate 52. However, the present disclosure is not limited to this.

[0048] In the above-described embodiment, the vehicle seat according to the present disclosure is applied to a vehicle. However, the application of the invention disclosed in this specification is not limited thereto. That is, the present disclosure can also be applied to seats used in vehicles such as railway cars, ships, and aircraft, as well as stationary seats used in theaters, homes, etc.

[0049] Furthermore, the present disclosure is not limited to the above-described embodiments as long as it conforms to the spirit of the disclosure described in the above-described embodiments. Therefore, the present disclosure may be a configuration in which at least two of the above-described embodiments are combined, or a configuration in which any of the components illustrated or described with reference numerals in the above-described embodiments is eliminated. [Explanation of symbols]

[0050] 1... Seat back 3... Back frame 4. Upper frame 5... Side frame 7... Back panel 51... Frame body 51A... First plate section 51B... Second plate section 51C... Third plate section 51D... 4th plate section 52... Reinforcement plate 52A… Inclined part 52B... Flange part

Claims

1. In the side frame that constitutes part of the back frame of the seat back, a first plate portion that is substantially perpendicular to the seat width direction; a second plate portion disposed at a position spaced apart from the first plate portion in a seat width direction and extending substantially perpendicular to the seat width direction; a third plate portion connecting a front end side of the first plate portion in the seat front-rear direction and a front end side of the second plate portion in the seat front-rear direction; a reinforcing plate joined to a surface of the first plate portion on the side of the second plate portion; an inclined portion provided on a front end side of the reinforcing plate in the seat front-rear direction, the inclined portion being inclined with respect to the first plate portion so that the front end side in the seat front-rear direction is located on the second plate portion side; The inclined portion is surrounded by the first plate portion, the second plate portion, and the third plate portion of the side frame.

2. a seat front-rear direction dimension of the second plate portion is smaller than a seat front-rear direction dimension of the first plate portion, The side frame according to claim 1 , further comprising an opening, through which the reinforcing plate is exposed, formed rearward of a rear end side of the second plate portion in the seat front-rear direction.

3. a fourth plate portion extending in a seat width direction from a rear end side of the first plate portion in the seat front-rear direction; a flange portion extending in the seat width direction from a rear end side of the reinforcing plate in the seat front-rear direction, The side frame according to claim 2 , wherein a seat width dimension of the fourth plate portion and a seat width dimension of the flange portion are larger than a seat width dimension of the third plate portion.

4. The first plate portion and the reinforcing plate each have a through hole extending therethrough in a thickness direction, The side frame according to any one of claims 1 to 3, further comprising a reinforcing plate joined to the first plate portion in a state in which the through hole of the first plate portion and the through hole of the reinforcing plate are aligned.

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