JP6520575B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat. Specifically, the present invention relates to a vehicle seat provided with a seat frame.

  Conventionally, in a vehicle seat, a back frame constituting a frame of a seat back is configured by a pair of left and right side frames, and a plurality of cross-linked frames bridged between upper end portions and middle portions of each side frame. The thing which was done is known (patent literature 1). The cross-linked frames are firmly connected integrally to the side frames on each side by welding.

Japanese Patent Application Laid-Open No. 2003-11708

  However, in the above-mentioned prior art, the number of parts constituting the seat frame is large, and it takes time to position and weld each part. The present invention has been made to solve the above-mentioned problems, and the problem to be solved by the present invention is to rationally constitute a seat frame with a small number of parts.

  In order to solve the above-mentioned subject, the vehicle seat of the present invention takes the following measures.

  A first aspect of the present invention is a vehicle seat including a seat frame, wherein a part of the seat frame is formed in a branched shape, and at least one of the branched portions is bridged over the other portion of the seat frame. It is a combination.

  According to the first aspect of the present invention, it is possible to construct a reinforcement structure by cross-linking in the seat frame by utilizing a part of the configuration formed in a branched shape of the seat frame. Therefore, since the separate frame for the said bridge | crosslinking can be reduced, a seat frame can be rationally comprised with a small number of parts.

  The second invention has the following configuration in the first invention described above. That is, a part of the side frame on one side of the vehicle seat constituting the seat frame is formed in a branched shape, and at least one of the branched side is bridged and coupled to the other side frame There is.

  According to the second aspect of the invention, there is provided a high-strength bridge frame which extends continuously from one side frame to the other side frame between both side frames and is integrally bridged. Can.

  The third invention is the following configuration in the first or second invention described above. That is, both branched branches of the seat frame are mutually offset and connected to the same frame member.

  According to the third aspect of the present invention, both of the cross-linked frames branched from one part of the seat frame and cross-linked to another part are provided in a form of wide cross section by mutually offsetting to give high structural strength It can be configured.

  According to a fourth invention, in any one of the first to third inventions described above, the following configuration is adopted. That is, the upper portion of the side frame on one side of the seatback constituting the seat frame is formed in a branched shape, and both branched sides are in the height direction with respect to the side frame on the other side of the seatback The upper frame is configured to be attached in a staggered form to attach the headrest of the seat back.

  According to the fourth aspect of the invention, the high structural strength of the headrest having a wide cross-section in the height direction by both bridge frames branched from the side frame on one side of the seat back and bridged to the side frame on the other side. Upper frame that can be supported.

  The fifth invention has the following configuration in the fourth invention described above. That is, both branched from the top of the side frame on one side are connected to the side frame on the other side in a configuration in which the arrangement in the height direction of a part of the shape is overlapped in the front and back.

  According to the fifth aspect of the present invention, in the arrangement area in the height direction in which both the cross-linked frames are arranged, it is possible to configure an area with high structural strength where the cross-linked frames overlap each other in the height direction.

  The sixth aspect of the present invention is the following configuration in any of the third to fifth aspects of the invention described above. That is, both of the seat frame formed in the branched shape are formed by the part of the seat frame being cut in the branched shape, and the closed cross is deviated from the shape before being cut apart from each other. It is matched to the form which makes the surface shape.

  According to the sixth aspect of the present invention, in the arrangement area in the height direction in which both bridged frames are arranged, a region with high structural strength is formed in which both bridged frames form a closed cross-sectional shape. Can.

FIG. 1 is a perspective view showing a schematic configuration of a vehicle seat of Example 1; It is a perspective view of an inner side frame single-piece | unit. It is a front view of a back frame. It is a side view of a back frame. FIG. 5 is a cross-sectional view taken along line VV of FIG. 4; FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 4; FIG. 7 is a cross-sectional view taken along line VII-VII of FIG. 4; FIG. 8 is a cross-sectional view taken along line VIII-VIII of FIG. 4; FIG. 9 is a cross-sectional view taken along line IX-IX of FIG. 3; FIG. 10 is a front view of a back frame of Example 2; 11 is a cross-sectional view taken along line XI-XI of FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

<Basic structure of sheet 1>
First, the configuration of the seat 1 (vehicle seat) of the first embodiment will be described using FIGS. 1 to 9. As shown in FIG. 1, the seat 1 of the present embodiment is configured as a right seat of a car, and a seat back 2 serving as a backrest of a seated occupant, a seat cushion (not shown) serving as a seating portion, And the headrest 3 which becomes. The lower ends of the left and right sides of the seatback 2 are connected to and supported by the rear ends of the left and right sides of the seat cushion via a recliner (not shown). The headrest 3 is inserted into the upper portion of the seatback 2 from above and mounted.

  Specifically, in the headrest 3 described above, cylindrical support members 2A in which the leg portions of a pair of left and right round rod-like headrest stays 3A extending from the lower surface portion are embedded in the upper surface portion of the seatback 2 The respective support members 2A are attached in a fixed and fixed state by being inserted from the upper side into the interior of the housing. The structure of each support member 2A to which each leg of the headrest stay 3A described above is inserted and attached is a known structure disclosed in the documents such as Japanese Patent Laid-Open No. 2000-41783. The description of the specific configuration is omitted.

  The support members 2A described above are respectively provided in the pair of left and right rectangular cylindrical support brackets 13 attached to the upper frame region 11U of the back frame 10 assembled in the inverted U-shape forming the framework of the seat back 2 It is inserted and installed from the upper side. Each support bracket 13 is inserted from the upper side into the pair of left and right rectangular through holes 11A4 and 11B4 formed in the upper frame region 11U of the back frame 10 described above. By welding, the upper frame region 11U of the back frame 10 is in a firmly integrated state. Here, the back frame 10 mentioned above corresponds to the "seat frame" of this invention.

  The upper frame region 11U of the back frame 10 described above is formed by bending the upper region of the inner side frame 11 constituting the side frame of the back frame 10 inside the vehicle, as shown in FIG. There is. Specifically, the upper frame region 11U described above branches in a bifurcated manner into the first branch frame 11A and the second branch frame 11B in the front and back by a notch 11C in which the upper region of the inner side frame 11 is inserted in the height direction. It is divided into shapes, and each is bent in such a way as to partially offset each other in the height direction toward the outside of the vehicle, thereby being formed into a shape having a wide width in the height direction There is.

  With the above configuration, the upper frame region 11U is configured to have an enhanced structural strength for supporting the above-described support brackets 13 inserted into the right and left at two locations in the height direction. As described above, the upper frame region 11U is integrally connected to the inner side frame 11 without fixing a different frame member separately to the inner side frame 11 by welding or the like using the configuration of the inner side frame 11. It is configured as a high strength member with a wide height.

  Hereinafter, the specific configuration of each part of the back frame 10 described above will be described in detail. That is, as shown in FIGS. 1 and 3, the back frame 10 includes an inner side frame 11 that constitutes a side frame of the seatback 2 inside the vehicle, and an outer that constitutes the side frame of the seatback 2 outside the vehicle. A side frame 12 and a pair of left and right rectangular tubular support brackets 13 coupled to an upper frame region 11U formed by being bent outward from the upper region of the inner side frame 11 are provided. Here, the inner side frame 11 corresponds to the "one side frame" of the present invention, and the outer side frame 12 corresponds to the "other side frame" of the present invention.

  Each of the inner side frame 11 and the outer side frame 12 described above is formed of an extruded material of an aluminum alloy. Specifically, as shown in FIGS. 2 and 5, the inner side frame 11 is formed by extruding an aluminum alloy, and first, a rectangular tube elongated in the height direction having a rectangular cross section elongated in the front-rear direction. It is formed in shape. The inner side frame 11 is, as shown in FIGS. 2 and 4, centered on the height position area (bent portion 11L) for supporting the waist of the seated occupant, the upper area is rearward with respect to the lower area. It has a shape that is bent in a bow shape on the side.

  Then, in the region above the bending portion 11L of the inner side frame 11, a notch 11C for dividing the cross section of the inner side frame 11 into a bifurcated shape in the front and rear direction is a region above the bending portion 11L. It is inserted into a straight cylinder along the extending direction (hereinafter, referred to as "upward direction"). As a result, in the region above the bending portion 11L of the inner side frame 11, the first branch frame 11A and the second branch frame 11B having cross sectional shapes symmetrical to each other in the front-rear direction are two or more in the front-rear direction. It is in the state of being formed into a bifurcated shape in a divided form.

  Then, in the inner side frame 11, the first branch frame 11A and the second branch frame 11B branched in the branch shape are mutually drawn upward from the midway point where the first branch frame 11A and the second branch frame 11B are separated from each other. It is bent obliquely to the side, and it is made into the shape piled up in the shape which mutually approached in the front-back direction (refer FIGS. 6-8). Specifically, as shown in FIGS. 7 to 8, the first branch frame 11A and the second branch frame 11B are formed by shifting the outer wall portions 11A1 and 11B1 and the inner wall portions 11A3 and 11B3 in the width direction. It is made into the shape combined with the shape of the rectangular cylinder shape which made front wall part 11A2 and back wall part 11B2 mutually approach in the front-back direction by the form piled up inside and outside.

  Then, as shown in FIGS. 2 and 4, the first branch frame 11A and the second branch frame 11B are maintained at the upper side by maintaining the rectangular tube shape from the portion fitted to the rectangular tube shape. In the same cross-sectional shape (see FIG. 8). According to the above-mentioned shape, as shown in FIG. 3, the height direction is maintained while the width is kept substantially constant in a front view in the height region from the unbranched lower end portion of the inner side frame 11 mentioned above to the above-mentioned drum region 11D. The side frame region 11S is formed to extend straight to the frame.

  Furthermore, as shown in FIG. 2 and FIG. 4, the second branch frame 11B is bent in a straight form with a curve toward the vehicle outer side prior to the first branch frame 11A from the tip of the body diameter region 11D. It is done. Then, subsequently to this, at a position higher than that, the first branch frame 11A is also bent so as to extend straight with a curve toward the vehicle outer side as well.

  The above-described bending of the first branch frame 11A and the second branch frame 11B to the outside of the vehicle is in a curved shape with the same curvature. As a result, the first branched frame 11A and the second branched frame 11B are in a state in which the respective bending is performed without interference with each other. By the above-described bending, an upper frame region 11U is formed in which the first branch frame 11A and the second branch frame 11B overlap each other in the height direction and extend straight in the width direction.

  The first branch frame 11A and the second branch frame 11B in the upper frame region 11U mutually maintain the same front-rear width as the body diameter region 11D described above with reference to FIG. 8 as shown in FIG. , 11B1 and the inner wall portions 11A3 and 11B3 are separated in the height direction, the height width of the entire upper frame region 11U formed by a combination of these is expanded. The first branch frame 11A and the second branch frame 11B in the upper frame region 11U are, as shown in FIG. 9, between the inner wall 11A3 of the first branch frame 11A and the outer wall 11B1 of the second branch frame 11B. A gap in the height direction (separation width 11E) is formed.

  As shown in FIGS. 1 and 3, in the first branch frame 11A and the second branch frame 11B constituting the upper frame area 11U described above, the respective end portions of the first branch frame 11B and the second branch frame 11B bent outward of the vehicle are outer side The upper side area of the frame 12 is butted from the inside in the width direction and welded to be integrally coupled to the outer side frame 12. The outer side frame 12 is also formed into a rectangular tube shape elongated in the height direction having a rectangular cross section long in the front-rear direction, as with the inner side frame 11 described above, and then the waist portion of the seated occupant The upper side area is bent in a bowing manner toward the rear side with respect to the lower side area, with a height position area (a bending portion 12L) supporting the lower side area. End portions on the vehicle outside of the first branch frame 11A and the second branch frame 11B constituting the upper frame region 11U are fitted in holes formed in the upper region of the outer side frame 12 so as to penetrate. It may be welded.

  Then, as shown in FIG. 2, the height direction for inserting the above-described square tubular support brackets 13 at the two right and left places on the upper frame area 11U bent from the inner side frame 11 to the vehicle outer side. The rectangular through holes 11A4 and 11B4 are formed in the through hole. Each of the through holes 11A4 and 11B4 constitutes the upper frame area 11U, as shown in FIGS. 2 to 3 and 9, and the outer wall 11A1 and the inner wall 11A3 of the first branch frame 11A aligned in the height direction, and It is formed in the form which penetrates in the shape of a straight line in the height direction in outer wall part 11B1 and inner wall part 11B3 of 2nd branch frame 11B, respectively. Then, the support brackets 13 corresponding to the respective through holes 11A4 and 11B4 formed through are respectively inserted from the upper side, and the contact locations of the support brackets 13 are welded, so that each support bracket 13 is in the upper frame region 11U. It is in a state of being firmly connected integrally on top.

  By the above-described assembly, each support bracket 13 is supported by the upper frame region 11U having the height width described above in a state in which the entire circumference is supported in a wide range in the height direction. The headrest 3 (see FIG. 1) to be assembled to the above can be strongly supported from the lower side, and has a high structural strength. Specifically, each support bracket 13 is supported by the upper frame area 11U described above in such a manner that the upper area and the lower area and the middle area are all surrounded by the upper frame area 11U. Thus, even if a large load caused by a collision of the vehicle or the like is applied to the headrest 3 in the front-rear direction, the upper, lower, and middle portions of the support brackets 13 are strongly supported by the upper frame region 11U. Therefore, the load can be received strongly without being inclined in the front-rear direction.

<Summary>
Summarizing the above, the seat 1 of the present embodiment has the following configuration. That is, it is a vehicle seat (seat 1) provided with a seat frame (back frame 10), and a part (inner side frame 11) of the seat frame (back frame 10) is branched into a branched shape, At least one of the branches (in this embodiment, both the first branch frame 11A and the second branch frame 11B) is bridged and coupled to the other portion (outer side frame 12) of the seat frame (back frame 10) It is a thing.

  With such a configuration, the seat frame (back frame 10) is formed using the configuration of a part (inner side frame 11) formed in a branched shape of the seat frame (back frame 10). ) Can constitute a reinforcing structure by crosslinking. Therefore, since the separate frame for the said bridge | crosslinking can be reduced, a seat frame (back frame 10) can be rationally comprised by a small number of parts.

  Specifically, a part of the side frame (inner side frame 11) on one side of the vehicle seat (seat 1) constituting the seat frame (back frame 10) is formed in a branched manner, At least one of the branches (in this embodiment, both the first branch frame 11A and the second branch frame 11B) is bridged and coupled to the other side frame (outer side frame 12). With such a configuration, one side frame (inner side frame 11) to the other side frame (outer side frame 12) are formed between the side frames (inner side frame 11 and outer side frame 12). Can be constructed continuously, and a bridged frame of high structural strength can be constructed so as to extend over integrally.

  Further, both branched (the first branched frame 11A and the second branched frame 11B) of the seat frame (the back frame 10) are mutually connected in a mutually offset manner with respect to the same frame member (the outer side frame 12). . With such a configuration, both of the cross-linked frames (the first one) branched from a part (inner side frame 11) of the seat frame (back frame 10) and bridged to the other part (outer side frame 12) By branching the branched frame 11A and the second branched frame 11B) to each other, a wide cross section can be provided to provide a high structural strength.

  In addition, the upper portion of the side frame (inner side frame 11) on one side of the seat back 2 constituting the seat frame (back frame 10) is formed in a branched shape, and both branches (first branched frame 11A and the second branch frame 11B) are coupled to the other side frame (outer side frame 12) of the seat back 2 in a mutually offset manner in the height direction, and the headrest 3 of the seat back 2 is attached to the upper A frame (upper frame area 11U) is configured. With such a configuration, both cross-linked frames branched from the side frame (inner side frame 11) on one side of the seat back 2 and bridged to the other side frame (outer side frame 12) ( The first branch frame 11A and the second branch frame 11B can constitute an upper frame (upper frame region 11U) which can support the headrest 3 with high structural strength having a wide cross section in the height direction.

  Further, both of the side branches (the first branch frame 11A and the second branch frame 11B) branched from the upper portion of the side frame (inner side frame 11) on one side are mutually shaped with respect to the side frame (outer side frame 12) on the other side. A part of the arrangement in the height direction is coupled in a form of being superimposed in front and back. With such a configuration, both bridging frames (first branch frame 11A and second branch frame 11A and second branch frame 11A and second branch frame 11A and second branch frame 11A and second branch frame 11A and second branch frame 11A and second branch frame 11A and It is possible to configure a region with high structural strength in which the branched frames 11B) overlap each other in the height direction.

  Further, both (the first branched frame 11A and the second branched frame 11B) formed in the branched shape of the seat frame (back frame 10) form a part (inner side frame) of the seat frame (back frame 10) 11) is formed by being divided into branches, and is fitted in a form that is shifted from the shape before being separated from each other to form a closed cross-sectional shape. Specifically, as shown in FIG. 9, a closed cross section is formed by the front wall 11A2 and the inner wall 11A3 of the first branch frame 11A, and the rear wall 11B2 and the outer wall 11B1 of the second branch frame 11B. It is adapted to form the In the present embodiment, the closed cross-sectional shape is a slightly open cross-sectional shape, but it may be a completely closed cross-sectional shape. With such a configuration, both bridging frames (first branch frame 11A and second branch frame 11A and second branch frame 11A and second branch frame 11A and second branch frame 11A and second branch frame 11A and second branch frame 11A and second branch frame 11A and It is possible to configure a region of high structural strength in which the branched frames 11B) are combined with each other to form a closed cross-sectional shape.

  Then, the structure of the sheet | seat 1 of Example 2 is demonstrated using FIGS. 10-11. In the present embodiment, as shown in FIGS. 10 to 11, the upper frame region 11U formed by being branched from the upper region of the inner side frame 11 (one side frame) and bent to the vehicle outer side is the first The outer wall portion 11B1 of the second branched frame 11B is formed in a cross-sectional shape bent so as to be in surface contact with the inner wall portion 11A3 of the branched frame 11A. Thus, the first branch frame 11A and the second branch frame 11B are pulled apart in the height direction such that the inner wall portion 11A3 and the outer wall portion 11B1 are in surface contact with each other. While overlapping the arrangement in the height direction, it is in a state in which the height width is fully expanded. As a result, the upper frame region 11U can firmly support each support bracket 13 in a state where the upper frame region 11U supports the respective support brackets 13 and the height width is expanded more widely. The configuration other than the above is the same as the configuration of the seat 1 shown in the first embodiment, so the same reference numerals are given and the description is omitted.

  As mentioned above, although the embodiment of the present invention was explained using two examples, the present invention can be implemented with various forms other than each above-mentioned example. For example, the configuration of the "vehicle seat" of the present invention is widely used not only for seats other than the right seat of automobiles, but also for vehicles other than automobiles such as railways, and seats for various vehicles such as aircraft and ships. It can be applied.

  In addition, the configuration of the "seat frame" of the present invention is not limited to the frame of the seatback side frame, the frame of the seat cushion, the frame of the headrest, etc. Is also applicable. In addition, in the configuration in which a part of the seat frame is branched into branches, in addition to the one in which a cut (including cut and raised in the middle part) is made in part of the seat frame and branched, both ends are branched by folding the sheet frame. It may be branched by any molding such as one having a shape.

  In addition, the shape in which a part of the seat frame is branched into branches may be in the middle part besides the end part of the seat frame. Further, the shape in which a part of the seat frame is branched into a branched shape may be branched into two or more branches, or may be branched into three or more branches. Each shape may not necessarily be symmetrical, and either may be larger or smaller than the other.

  Further, each branched frame branched from a part of the seat frame may not be entirely bridged to the other part of the seat frame, but may be partially bridged. Then, among the branched frames, those which are not bridged to other parts may be made to function as a bracket for hooking some kind of equipment. Also, each branching frame may not be bent so as to overlap the cross-sectional shape with each other, and may be bent in different directions. In addition, the branched frames may not be all bridged by the same frame member, but may be bridged by different frame members.

  In addition, the seat frame in which each of the above-mentioned branched frames is formed does not necessarily have to have a cross-sectional shape before branching which is a closed cross-sectional shape such as a square tube or pipe, etc. It may consist of surface shape.

  Moreover, the "seat frame" of this invention is not limited to what consists of an aluminum alloy material, You may consist of various materials, such as an iron material and a magnesium alloy material. In addition, the “seat frame” may be formed by processing other than extrusion such as a press.

  Further, in the above embodiment, the first branched frame and the second branched frame formed in the shape of branching the seat frame into a branched shape are illustrated as being bent into the shape having the same curvature from the different bending positions. However, both branched frames may be bent at curvatures different from each other. Specifically, those having a curvature which is larger than that of a branched frame where the branched frames that come inwards come to the outside and those which are bent with a smaller curvature than those of the branched frames where the branched frames that come inwards come to the outside are included. . The bifurcated frames may be bent from the same bending position as well as those bent from different bending positions.

  Further, in the above embodiment, the bifurcated bifurcated bifurcated frames are temporarily bent in a form of drawing them diagonally once so that the combined shapes from the mutually aligned positions extend straight in the form of a straight cylinder. In the embodiment, although the example in which the body region is formed is illustrated, the body may be bent so as to be drawn diagonally to each other without forming the body region, and may be formed so as to start bending from the mutually aligned position. .

1 seat 2 seat back 2A support member 3 headrest 3A headrest stay 10 back frame (seat frame)
11 Inner side frame (one side frame)
11A first branch frame 11A1 outer wall portion 11A2 front wall portion 11A3 inner wall portion 11A4 through hole 11B second branch branch frame 11B1 outer wall portion 11B2 rear wall portion 11B3 inner wall portion 11B4 through hole 11C cut body 11C cut body region 11E separation width 11L bent portion 11S side frame Area 11U Upper frame area 12 Outer side frame (side frame on the other side)
12L bend 13 support bracket

Claims (3)

A vehicle seat comprising a seat frame,
A part of the seat frame is formed in a branched form, and at least one of the branched parts is bridged and coupled to the other part of the seat frame ,
The upper portion of the side frame on one side of the seat back constituting the seat frame is formed in a branched shape, and both branched sides are mutually in the height direction with respect to the side frame on the other side of the seat back A vehicle seat constituting an upper frame, which is coupled in a staggered form and to which a headrest of the seatback is attached . A vehicle seat according to claim 1, wherein
The vehicle seat in which both branched from the upper portion of the one side frame are joined to each other in a form in which the arrangement in the height direction of a part of the shape is overlapped with the other side frame . The vehicle seat according to claim 1 or 2, wherein
Both of the seat frame formed into a branched shape are formed by the part of the seat frame being cut into a branched shape, and the closed cross section is deviated from the shape before being cut into each other. seat for a vehicle that is fit to form in the shape.

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