JP2017043226A - Vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To rationally configure a seat frame from a small number of components.SOLUTION: A seat 1 includes a back frame 10 (seat frame), where an inner-side frame 11 is formed in a branching shape branching into a first branching frame 11A and a second branching frame 11B that are stretched and connected to an outer-side frame 12.SELECTED DRAWING: Figure 1

Description

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

  Conventionally, in a vehicle seat, a back frame constituting a skeleton of a seat back is configured by a pair of left and right side frames and a plurality of bridge frames that are bridged between upper end portions and intermediate portions of each side frame. Is known (Patent Document 1). Each of the bridge frames is in a state of being firmly and integrally coupled to the side frames on each side by welding.

Japanese Patent Laid-Open No. 2003-11708

  However, in the above 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 was devised as a solution to the above problem, and the problem to be solved by the present invention is to rationally configure a seat frame with a small number of parts.

  In order to solve the above problems, the vehicle seat of the present invention takes the following means.

  A first 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 branches is bridged over the other part of the seat frame. It is what is combined.

  According to the first aspect of the present invention, it is possible to form a reinforcing structure by bridging the seat frame by using a part of the structure formed in a branched shape of the seat frame. Accordingly, since a separate frame for the cross-linking can be reduced, the seat frame can be rationally configured with a small number of parts.

  The second invention is 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 portions is bridged and joined to the other side frame. Yes.

  According to the second aspect of the present invention, the bridge frame having a high structural strength is configured to extend continuously from the side frame on one side to the side frame on the other side between the side frames and to be integrally bridged. Can do.

  The third invention is the following configuration in the first or second invention described above. That is, both the branched parts of the seat frame are coupled to each other with respect to the same frame member.

  According to the third aspect of the present invention, both cross-linking frames that are branched from a part of the seat frame and cross-linked to the other part are provided in a shape having a wide cross section by being shifted from each other so as to have a 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 part of the side frame on one side of the seat back constituting the seat frame is formed in a branched shape, and both of the branched sides are in a height direction with respect to the side frame on the other side of the seat back. The upper frame is configured so that the headrest of the seat back is attached by being coupled in a shifted shape.

  According to the fourth aspect of the present invention, the high strength of the headrest having a wide cross section in the height direction is achieved by both of the cross-linked frames that are branched from the side frame on one side of the seat back and cross-linked to the side frame on the other side. It is possible to configure an upper frame that can be supported by.

  The fifth invention is the following structure in the fourth invention described above. That is, both branches from the upper part of the one side frame are joined to the other side frame in such a manner that a part of the shape in the height direction is overlapped on the front and rear.

  According to the fifth aspect of the present invention, it is possible to configure a region having high structural strength in which both bridge frames overlap each other in the height direction in the arrangement region in the height direction in which both bridge frames are arranged.

  A sixth invention is the following configuration in any of the third to fifth inventions described above. In other words, both of the seat frames that are formed in a branched shape are formed by partly cutting the seat frame in a branched shape, and are shifted from the shape before being separated from each other to be closed. Matched to the shape of the surface shape.

  According to the sixth aspect of the present invention, in the arrangement region in the height direction in which both the bridging frames are arranged, a region having a high structural strength is formed in which the two bridging frames are combined with each other to form a closed cross-sectional shape. Can do.

1 is a perspective view illustrating a schematic configuration of a vehicle seat of Example 1. FIG. It is a perspective view of an inner side frame simple substance. It is a front view of a back frame. It is a side view of a back frame. It is the VV sectional view taken on the line of FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. 4. It is the VII-VII sectional view taken on the line of FIG. It is the VIII-VIII sectional view taken on the line of FIG. It is the IX-IX sectional view taken on the line of FIG. 6 is a front view of a back frame according to Embodiment 2. FIG. It is the XI-XI sectional view taken on the line of FIG.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing.

<Basic structure of sheet 1>
First, the configuration of the seat 1 (vehicle seat) according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the seat 1 according to the present embodiment is configured as a right seat of an automobile. It is the structure provided with the headrest 3 used as this. The seat back 2 is supported by connecting lower end portions of the left and right sides thereof to rear end portions of the left and right sides of the seat cushion via recliners (not shown). The headrest 3 is attached to the upper part of the seat back 2 by being inserted from above.

  Specifically, the headrest 3 described above has a cylindrical support member 2A in which each leg portion of a pair of left and right round bar-shaped headrest stays 3A extending from the lower surface portion is embedded in the upper surface portion of the seat back 2, respectively. By being inserted into the inside from above, it is attached in a state where it is engaged with each support member 2A and fixed in position. In addition, about the structure of each support member 2A which inserts and mounts each leg part of the headrest stay 3A mentioned above, since it is a well-known structure disclosed by literature, such as Unexamined-Japanese-Patent No. 2000-41783, these A description of the specific configuration will be omitted.

  Each of the support members 2A described above is placed in a pair of left and right square cylindrical support brackets 13 attached to the upper frame region 11U of the back frame 10 that is assembled in an inverted U shape forming the skeleton of the seat back 2, respectively. It is inserted and installed from above. The support brackets 13 are respectively inserted from above into a pair of left and right rectangular through holes 11A4 and 11B4 penetrating in the height direction formed in the upper frame region 11U of the back frame 10 described above. By being welded, the upper frame region 11U of the back frame 10 is firmly and integrally coupled. Here, the back frame 10 described above corresponds to the “seat frame” of the present invention.

  As shown in FIG. 2, the upper frame region 11U of the back frame 10 described above is formed by bending an upper region of the inner side frame 11 constituting the side skeleton inside the vehicle of the back frame 10 to the outside of the vehicle. Yes. Specifically, the upper frame region 11U described above is bifurcated into a first branch frame 11A and a second branch frame 11B in the front and rear direction by a cut 11C in which the upper region of the inner side frame 11 is cut in the height direction. It is cut into a shape, and each of them is bent toward the outside of the vehicle by partially shifting the shape of each other in the height direction, thereby forming a state having a wide width in the height direction. Yes.

  With the above configuration, the upper frame region 11U has a configuration in which the structural strength for supporting each of the above-described support brackets 13 penetrating in the height direction at the two left and right portions is increased. As described above, the upper frame region 11U is integrally connected to the inner side frame 11 by using the configuration of the inner side frame 11 without separately providing different frame members to the inner side frame 11 by welding or the like. It is configured as a high-strength member with a wide width.

  Hereinafter, a 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 forms a side skeleton inside the vehicle of the seat back 2 and an outer side frame that forms a side skeleton outside the vehicle of the seat back 2. A side frame 12 and a pair of left and right square cylindrical support brackets 13 coupled to an upper frame region 11U formed by bending outward from the upper region of the inner side frame 11 are provided. Here, the inner side frame 11 corresponds to “one side frame” of the present invention, and the outer side frame 12 corresponds to “other side frame” of the present invention.

  The inner side frame 11 and the outer side frame 12 described above are each 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. First, a rectangular tube that is long in the height direction and has a rectangular cross section that is long in the front-rear direction. It is formed into a shape. As shown in FIGS. 2 and 4, the inner side frame 11 has an upper side region behind the lower side region centered on a height position region (bending portion 11 </ b> L) that supports the waist of the seated occupant. It is made into the shape bent in the shape which curves to the side like a bow.

  In the region above the bent portion 11L of the inner side frame 11, a cut 11C that cuts the cross section of the inner side frame 11 into a bifurcated front and rear is formed in the region above the bent portion 11L. It is put in the shape of a straight cylinder along the extending direction (hereinafter referred to as “upward direction”). As a result, in the region above the bent portion 11L of the inner side frame 11, the first branch frame 11A and the second branch frame 11B having symmetrical cross-sectional shapes in the front-rear direction are equal to each other in the front-rear direction. It is in a state of being formed into a bifurcated shape that is divided.

  In the inner side frame 11, the first branch frame 11 </ b> A and the second branch frame 11 </ b> B branched in the above-described branch shape are drawn toward each other in the upward direction from the respective halfway points. It is formed into a shape that is obliquely bent to the side and overlaid so as to be close to each other in the front-rear direction (see FIGS. 6 to 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 united with the shape of the square cylinder which made the front wall part 11A2 and the rear wall part 11B2 mutually approach in the front-back direction in the form which overlaps inside and outside.

  As shown in FIGS. 2 and 4, the first branch frame 11A and the second branch frame 11B are arranged on the upper side so as to maintain the rectangular tube shape from the place where the rectangular tube shape is fitted. It is set as the shape which has the size cylinder area | region 11D extended with the same cross-sectional shape straight (refer FIG. 8). Due to the above shape, as shown in FIG. 3, the height direction from the lower end of the inner side frame 11 to which the inner side frame 11 is not branched to the size cylinder region 11 </ b> D is maintained in a height direction while maintaining a substantially constant lateral width in front view. A side frame region 11S that extends straight is formed.

  Further, as shown in FIG. 2 and FIG. 4, the second branch frame 11B is bent from the tip of the dimension region 11D so as to extend straight with a curve toward the outside of the vehicle, preceding the first branch frame 11A. It has been. Subsequently, the first branching frame 11A is bent at a position higher than the first branching frame 11 so as to extend straight with a curve toward the outside of the vehicle.

  The first branch frame 11A and the second branch frame 11B described above are bent outward from the vehicle in a curved shape having the same curvature. Accordingly, the first branch frame 11A and the second branch frame 11B are in a state in which the respective bending is performed in such a manner that interference does not occur. By the above 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.

  As shown in FIG. 4, the first branch frame 11A and the second branch frame 11B in the upper frame region 11U maintain the same front-rear width as the dimension region 11D described above with reference to FIG. , 11B1 and the inner wall portions 11A3, 11B3 are separated from each other in the height direction, so that the height width of the entire upper frame region 11U formed by the combination thereof is expanded. As shown in FIG. 9, the first branch frame 11A and the second branch frame 11B in the upper frame region 11U are located between the inner wall portion 11A3 of the first branch frame 11A and the outer wall portion 11B1 of the second branch frame 11B. It is the shape which opened the clearance gap (separation width 11E) of the height direction.

  As shown in FIGS. 1 and 3, the first branch frame 11A and the second branch frame 11B that constitute the above-described upper frame region 11U are configured such that their respective end portions bent toward the outside of the vehicle have outer sides. By being abutted and welded to the upper region of the frame 12 from the inside in the width direction, the outer side frame 12 is integrally coupled. Similarly to the inner side frame 11 described above, the outer side frame 12 is also formed into a rectangular tube shape that is elongated in the height direction and has a rectangular cross section that is long in the front-rear direction. Centering on the height position area (bending portion 12L) that supports the upper side area, the upper side area is bent in a bow-like shape to the rear side with respect to the lower side area. In addition, each edge part of the vehicle outer side of 11 A of 1st branch frames and the 2nd branch frame 11B which comprise the said upper frame area | region 11U is engage | inserted in the hole penetrated to the upper area | region of the outer side frame 12. It may be welded.

  And as shown in FIG. 2, the height direction for inserting each square-tube-shaped support bracket 13 mentioned above into two right and left places on the upper frame area | region 11U bent from the inner side frame 11 to the vehicle outer side. Rectangular through-holes 11A4 and 11B4 penetrating therethrough are formed. Each of the through holes 11A4 and 11B4 includes, as shown in FIGS. 2 to 3 and 9, the outer wall portion 11A1 and the inner wall portion 11A3 of the first branch frame 11A arranged in the height direction and constituting the upper frame region 11U, The second branch frame 11B is formed so as to penetrate the outer wall portion 11B1 and the inner wall portion 11B3 in a straight line in the height direction. Then, the support brackets 13 corresponding to the through holes 11A4 and 11B4 formed so as to penetrate are respectively inserted from above and welded to each other, whereby each support bracket 13 is connected to the upper frame region 11U. It is in a state of being firmly and integrally coupled to the top.

  As a result of the above assembly, each support bracket 13 is supported by the upper frame region 11U whose height and width are expanded in a state where the entire circumference is surrounded over a wide range in the height direction. It is set as the structure provided with the high structural strength which can strongly support the headrest 3 (refer FIG. 1) mentioned above assembled | attached to from the downward side. Specifically, each of the support brackets 13 is supported by the above-described upper frame region 11U so that the upper region, the lower region, and the intermediate region are surrounded by the entire circumference. As a result, each support bracket 13 is strongly supported by the upper frame region 11U at its upper, lower, and intermediate portions even when a large load is applied to the headrest 3 due to the occurrence of a vehicle collision from the front-rear direction. Thus, the load can be strongly received without being tilted in the front-rear direction.

<Summary>
In summary, the sheet 1 of the present embodiment has the following configuration. That is, a vehicle seat (seat 1) having a seat frame (back frame 10), a part of the seat frame (back frame 10) (inner side frame 11) is formed in a branched shape, At least one of the branches (both the first branch frame 11A and the second branch frame 11B in this embodiment) is spanned and joined to the other part (outer side frame 12) of the seat frame (back frame 10). Is.

  With such a configuration, the seat frame (back frame 10) is configured using the configuration of a part (inner side frame 11) formed in a branched shape of the seat frame (back frame 10). ) Can be provided with a reinforcing structure by cross-linking. Accordingly, since a separate frame for the bridge can be reduced, the seat frame (back frame 10) can be rationally configured with 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 shape. At least one of the branches (in the present embodiment, both the first branch frame 11A and the second branch frame 11B) is bridged and joined to the other side frame (outer side frame 12). With such a configuration, between the side frames (the inner side frame 11 and the outer side frame 12), the one side frame (the inner side frame 11) to the other side frame (the outer side frame 12). ), And a bridge frame having a high structural strength that extends continuously and is integrally bridged.

  Further, both the branched branches (the first branched frame 11A and the second branched frame 11B) of the seat frame (back frame 10) are coupled to each other with respect to the same frame member (outer side frame 12). . With such a configuration, both bridge frames (first frame) 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). The branching frame 11A and the second branching frame 11B) can be shifted to each other so as to form a wide cross section so as to have a high structural strength.

  Further, the upper part of one side frame (inner side frame 11) of the seat back 2 constituting the seat frame (back frame 10) is formed in a branched shape, and both the branches (first branched frame) are formed. 11A and the second branch frame 11B) are coupled to the other side frame (outer side frame 12) of the seat back 2 so as to be shifted from each other in the height direction, and the headrest 3 of the seat back 2 is attached. A frame (upper frame region 11U) is formed. With such a configuration, both bridge frames (branched from one side frame (inner side frame 11) of the seat back 2 and bridged to the other side frame (outer side frame 12) ( By the first branch frame 11A and the second branch frame 11B), an upper frame (upper frame region 11U) capable of supporting the headrest 3 with high structural strength having a wide cross section in the height direction can be configured.

  In addition, both sides (first branch frame 11A and second branch frame 11B) branched from the upper part of one side frame (inner side frame 11) are shaped with respect to the other side frame (outer side frame 12). Some of the arrangements in the height direction are joined in the form of overlapping one after the other. With such a configuration, both bridge frames (first branch frame 11A and second branch frame 11A and second branch frame 11A and second branch frame 11B) are arranged in the arrangement region in the height direction in which both bridge frames (first branch frame 11A and second branch frame 11B) are arranged. A region having a high structural strength can be formed in which the branching frames 11B) overlap each other in the height direction.

  In addition, both (first branch frame 11A and second branch frame 11B) formed in a branched shape of the seat frame (back frame 10) are part of the seat frame (back frame 10) (inner side frame). 11) is formed by being cut into branches, and is shifted from the shape before being cut into each other to match the shape of a closed cross-sectional shape. Specifically, as shown in FIG. 9, the front wall portion 11A2, the inner wall portion 11A3, the rear wall portion 11B2 and the outer wall portion 11B1 of the first branch frame 11A are closed in cross section. It is matched to the shape that forms. In the present embodiment, the closed cross-sectional shape is strictly a slightly open cross-sectional shape. However, the closed cross-sectional shape may be a completely closed cross-sectional shape. With such a configuration, both bridge frames (first branch frame 11A and second branch frame 11A and second branch frame 11A and second branch frame 11B) are arranged in the arrangement region in the height direction in which both bridge frames (first branch frame 11A and second branch frame 11B) are arranged. A region having a high structural strength can be formed in which the branching frames 11B) are combined to form a closed cross-sectional shape.

  Then, the structure of the sheet | seat 1 of Example 2 is demonstrated using FIGS. In the present embodiment, as shown in FIGS. 10 to 11, an upper frame region 11 </ b> U that is branched from the upper region of the inner side frame 11 (one side frame) and bent to the outside of the vehicle is the first frame. The outer wall portion 11B1 of the second branching frame 11B is formed on the inner wall portion 11A3 of the branching frame 11A so as to be bent so as to come into surface contact. As described above, the first branch frame 11A and the second branch frame 11B are separated in the height direction so that the inner wall portion 11A3 and the outer wall portion 11B1 are in surface contact with each other, so that the two are mutually separated. While the arrangement in the height direction is superimposed on the front and back, it is in a state of being fitted to a shape with the full height height expanded. Thus, the support frame 13 can be firmly supported by the upper frame region 11U in a state where the height width of the upper frame region 11U supporting the support brackets 13 is expanded more widely. In addition, since it is the same structure as the sheet | seat 1 shown in Example 1 about the structure except the above, suppose that the same code | symbol is attached | subjected and description is abbreviate | omitted.

  As mentioned above, although embodiment of this invention was described using two Examples, this invention can be implemented with various forms other than said each Example. For example, the configuration of the “vehicle seat” of the present invention is widely applicable to seats used for various vehicles such as railways, vehicles other than automobiles, airplanes, ships, etc. in addition to seats other than right seats of automobiles. It can be applied.

  In addition, the structure of the “seat frame” of the present invention may be any frame other than the side frame of the seat back as long as it constitutes the frame of the seat, such as a frame of a seat cushion or a frame of a headrest. Can also be applied. In addition, the structure in which a part of the seat frame is branched in a branching manner is that a part of the seat frame is notched (including a cut and raised portion of the middle part) and branched, and both ends are branched by folding the seat frame. It may be branched by any molding, such as a shape.

  In addition, the shape in which a part of the seat frame is branched may be in an intermediate portion in addition to the end portion of the seat frame. In addition, the form in which a part of the seat frame is branched into two branches may be branched into three or more branches instead of being branched into two branches. Each shape does not necessarily have to be a symmetric shape, and one of them may be larger or smaller than the other.

  In addition, each branch frame branched from a part of the seat frame may not be all over the other part of the seat frame, but may be partly bridged. Then, among the branched frames, those that are not bridged to other parts may be caused to function as brackets for hooking some equipment. Further, each branch frame does not have to be folded so that the cross-sectional shapes overlap each other, and each branch frame may be folded in different directions. Further, not all of the branching frames may be bridged over the same frame member, and each of the branching frames may be bridged over different frame members.

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

  Further, the “seat frame” of the present invention is not limited to one made of an aluminum alloy material, and may be made of various materials such as an iron material and a magnesium alloy material. Further, the “seat frame” may be formed by processing other than extrusion such as pressing.

  In the above-described embodiment, the first branch frame and the second branch frame that are formed so as to branch the seat frame into branches are bent from different folding positions into curved shapes with the same curvature. However, both the branched frames may be bent with different curvatures. Specifically, the inner branch frame is bent with a larger curvature than the outer branch frame, and the inner branch frame is bent with a smaller curvature than the outer branch frame. . Both branch frames may be bent from the same folding position as well as those folded from different folding positions.

  In the above embodiment, the bifurcated bifurcated frames are bent once so as to be drawn obliquely to each other so that the mated shapes extend straight from the mated positions. Although an example in which the size cylinder region is formed is illustrated, it may be formed so as to bend at an angle to each other without forming the size cylinder region so that the curve starts from a position where they are aligned with each other. .

DESCRIPTION OF SYMBOLS 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 frame 11B1 Outer wall portion 11B2 Rear wall portion 11B3 Inner wall portion 11B4 Through hole 11C Incision 11D Bending portion 11L Bending width 11L Separation width 11L Area 11U Upper frame area 12 Outer side frame (side frame on the other side)
12L Bent part 13 Support bracket

Claims (6)

A vehicle seat comprising a seat frame,
A vehicle seat in which a part of the seat frame is formed in a branched shape, and at least one of the branches is bridged and joined to the other part of the seat frame. The vehicle seat according to claim 1,
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 portions is bridged and joined to the other side frame. Vehicle seat. The vehicle seat according to claim 1 or 2,
A vehicle seat in which both branched branches of the seat frame are coupled to each other with respect to the same frame member. The vehicle seat according to any one of claims 1 to 3,
The upper part of the side frame on one side of the seat back constituting the seat frame is formed in a branched shape, and both the branches are in a height direction with respect to the side frame on the other side of the seat back. A vehicle seat constituting an upper frame to which a headrest of the seat back is attached by being coupled in a shifted shape. The vehicle seat according to claim 4,
A vehicle seat in which both branches from the upper part of the one side frame are joined to the other side frame in a form in which a part of the shape in the height direction is overlapped. The vehicle seat according to any one of claims 3 to 5,
Both of the seat frames that are formed in a branched shape are cross-sections that are formed by partly cutting the seat frame in a branched shape and are shifted from the shape before being separated from each other and closed. Vehicle seats that are matched to the shape of the shape.

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