JPH08280476A - Frame structure for seat - Google Patents

Abstract

PURPOSE: To provide the frame structure of a seat formed to be highly strong capable of easily mounting a stay holder and firmly holding it on a frame side, reduced in the number of components, welding parts and weight, improved in assemblablity and lowered in a cost. CONSTITUTION: A lower frame 2 in a square frame body shape is assembled to an upper frame 1 approximately in an inverse U shape and is fixed by spot welding or the like. The upper frame part 11 of the upper frame 1 and the upper frame part 20 of the lower frame 2 are provided with holes 40 and 50 for passing through the stay holders 3 and first and second holder holding pieces 42 and 52 are louvered and formed around them. The stay holders 3 are firmly held by the holes 40 and 50 and the first and second holder holding pieces 42 and 52.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a frame structure of a seat of a vehicle or the like, and more specifically, it will be described in more detail. A substantially U-shaped upper frame and a square frame-shaped lower frame fitted therein. The present invention relates to a seat frame structure that includes a stay holder for a headrest that is inserted and attached to the upper side of the seat, has a small number of parts, is easy to manufacture, and can be implemented at low cost.

[0002]

2. Description of the Related Art Generally, the frame structure of a vehicle seat is
It is necessary for the occupant to be stably held while traveling, to be comfortable to sit on, and to have sufficient strength. Also,
Since a headrest that protects the head of a seated person is detachably attached, a stay holder for holding the headrest is provided on the upper side. FIG. 10 shows an example of a frame structure of a seat that has been generally used conventionally. As shown in the figure, this frame structure includes side frames 70, 70 that are arranged to face each other, an upper frame 71 that is laid horizontally on the upper side, and a lower frame that is horizontally laid on the lower side of the side frames 70, 70. 72, an upper frame 73 for reinforcing the upper frame, and attaching a stay holder (not shown). Each of these components is welded at the connection site. In addition, the stay holder includes through holes 74, 7 of the upper frame 71 and the upper bracket 73.
Supported by 5.

[0003]

However, the conventional seat frame structure is composed of many components welded to each other, resulting in a large number of assembling steps and a high cost. Further, since it is a welded structure, it is easily deformed, and it is difficult to form a predetermined shape. Further, since the number of parts is large, the weight is high and the cost is high. Further, since there is no guide portion when the stay holder is inserted, it is difficult to perform the insertion work, and the supporting rigidity of the stay holder may be insufficient.

An object of the present invention is to reduce the number of constituent parts,
In addition, the number of welding points is reduced as much as possible to improve assembly workability, weight reduction, and cost reduction, and the frame strength is improved by the structure that the lower frame is combined with the upper frame, and the stay holder mounting work is easy. And a frame structure of a seat capable of stably holding the stay holder without providing a special member.

[0005]

The present invention has been made in view of the above-mentioned problems, and a frame structure for a seat according to claim 1 of the present invention is an upper frame part and its left and right ends downward. A substantially inverted U-shaped upper frame that integrally forms left and right side frame parts that are extended, a lower frame-shaped lower frame that is fixed in combination with the upper frame, and an upper frame of the lower frame And a head holder holding stay holder that is inserted into and supported by an upper frame portion of the upper frame, wherein the stay frame is inserted into the upper frame portion and the upper frame portion. Is formed, the upper frame portion is provided with a first stay holder holding piece which is cut and raised downward from an elongated hole formed by sandwiching the through hole, and the upper frame portion is provided. A second stay holder holding piece that is cut and raised upward from a long hole formed by sandwiching the through hole is provided, and the second stay holder holding piece and the first stay holder holding piece are arranged substantially orthogonal to each other. It is characterized by being.

In the seat frame structure according to a second aspect of the present invention, the upper frame portion is made of a member having a U-shaped cross section and having an opening portion downwardly, and the upper frame portion has an opening portion upwardly. It is characterized in that it comprises a member having a U-shaped cross section, and the upper frame and the upper frame part are polymerized to form a hollow box body.

[0007]

According to the frame structure for a seat according to the first aspect of the present invention, a substantially inverted U-shaped upper frame including an upper frame portion and left and right side plate portions, and the upper frame are combined and fixed to the upper frame. It is composed of a square frame-shaped lower frame and a stay holder that is inserted between the upper frame portion of the lower frame and the upper frame portion of the upper frame, and the stay holder is inserted between the upper frame portion and the upper frame portion. Since it is formed so as to be held by the first and second holder holding pieces formed downward and upward from the long hole formed by sandwiching the through hole, it has many configurations as in the prior art. Since it is not necessary to join the parts by welding, etc., the number of parts can be reduced, assembly workability can be improved and weight cost can be reduced, and the upper frame and the lower frame can be fitted together. Frame strength is improved. Further, the stay holder inserted between the upper frame portion of the upper frame and the through hole of the upper frame portion of the lower frame is held by the upper frame portion and the first and second holder holding pieces cut and raised from the upper frame portion. Therefore, the stay holder is guided by the insertion to facilitate the insertion, and the stay holder is held in the front, rear, left, and right directions, so that the stay holder can sufficiently withstand the impact from the headrest. Further, since the first and second holder holding pieces are not provided with special parts by welding or the like, the number of parts and cost can be reduced.

According to the seat frame structure of the second aspect of the present invention, the upper frame portion and the upper frame portion are hollow by superimposing members having a U-shaped cross section with openings downward and upward. Since the box body is formed and the headrest is supported by the hollow box body, the holding strength of the headrest is improved, and it is possible to sufficiently withstand the impact from the headrest and the impact load on the seat back and secure the strength.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The seat structure of a seat according to the present invention will be described in detail below with reference to the drawings. FIG. 1 shows the overall structure of an embodiment of the present invention, FIGS. 2 to 5 show the detailed structure of each component of this embodiment, and FIGS. 6 to 9 show the stay holder holding structure. Details are given for each. In addition, although the present embodiment is described as a case where the present invention is applied to a seat back of a vehicle seat, the present invention is not limited to this.
It also applies to various seat frames.

As shown in FIG. 1, the seat frame structure of this embodiment is mounted on the upper frame 1 and the lower frame 2 to hold an upper frame 1, a lower frame 2, and a headrest (not shown). It is composed of a pair of stay holders 3 and 3 to be held. The upper frame 1 and the lower frame 2 are formed as separate structures, and the upper frame 1 and the lower frame 2 are combined and joined by spot welding or the like to be integrated.

As shown in FIGS. 1 and 2, in the upper frame 1, an upper frame portion 11 and a left side frame portion 12 and a right side frame portion 13 extending downward from the left and right ends of the upper frame portion 11 are integrally combined. It is made of a substantially U-shaped member.
As shown in FIG. 3, the upper frame portion 11 has a downward opening 1
4 and has a U-shaped cross section surrounded by an upper plate 15, a front plate 16 and a rear plate 17. On the other hand, as shown in FIG. 2, the left and right side frame portions 12 and 13 are connected to an edge plate 18 connected to the front plate 16 or an edge plate (not shown) connected to the rear plate 17 and the upper plate 15. It is formed from a member having an L-shaped cross section or a U-shaped cross section, which includes the side plate 19 and the like.

As shown in detail in FIGS. 1 to 3, the upper plate 15 of the upper frame portion 11 has a stay holder 3 which will be described later.
There are two through holes 40 to be inserted. In addition, the long holes 41 are formed along the longitudinal direction of the upper plate 15 with the through hole 40 interposed therebetween.
41 is formed, and the edge 4 of the long holes 41, 41 on the side of the through hole 40 is formed.
The first holder holding pieces 42, 42 having a size corresponding to the areas of the long holes 41, 41 are cut and raised downward and vertically and vertically hang downward from each other. That is, the first holder holding pieces 42, 42 are formed by forming slits in the elongated hole-shaped contour portion of the elongated holes 41, 41, which has left the edge 43, and bending downward with the edge 43 as a base point. It is a thing. As shown in FIG. 7, the first holder holding pieces 42, 42 need to contact the outer circumference of the stay holder 3, and therefore are formed to be bent toward the stay holder 3 side as shown in the drawing.

As shown in FIGS. 1 and 4, the lower frame 2
Consists of an upper frame part 20, left and right frame parts 21, 22 and a lower frame part 23, which is a rectangular frame body surrounded on all sides, and these are formed by bending and joining one expansion plate. . As shown in detail in FIG. 5, the upper frame portion 20 has a U-shaped cross section surrounded by an upper frame plate 25, a front frame plate 26, and a rear frame plate 27 having an opening 24 in the upper portion. . In addition, the left and right frame portions 21, 22
The lower frame portion 23 is made of a flat plate and is connected to the upper frame plate 25.

As shown in detail in FIGS. 1, 4 and 5, the upper frame plate 25 of the upper frame portion 20 has two through holes 50 through which the stay holder 3 is inserted. Also, elongated holes 51, 51 are formed along the front-rear direction with the through hole 50 interposed therebetween. The long hole 5
1, 51 are the upper frame plate 25 to the front frame plate 26 or the rear frame plate 27.
Formed to the side. The second edge having a size corresponding to the area of the long holes 51, 51 from the end edge 53 of the long holes 51, 51 on the through hole 50 side.
The holder holding pieces 52, 52 are cut and raised upward, and vertically formed so as to face each other. still,
The second holder holding pieces 52, 52 are also formed by bending the long holes 51, 51. Further, as shown in FIG. 8, the second holder holding piece 5 is the same as the first holder holding piece 42.
2 is also bent and formed inward so that it can contact the outer periphery of the stay holder 3.

As shown in FIG. 6, the stay holder 3 has a head portion 30 and a body portion 3 which is reduced in diameter from the head portion 30 and extends downward.
1 and a wedge-shaped portion 32 at the tip. A step surface 33 is formed between the wedge-shaped portion 32 and the body portion 31, and a slit 34 is formed in the wedge-shaped portion 32 so that the wedge-shaped portion 32 can be radially reduced in diameter. Further, the outer diameter of the body portion 31 is the through hole 4
The diameter is slightly smaller than the inner diameter of 0,50. The center hole 35 is a through hole into which a support rod of a headrest (not shown) is inserted.

Next, a method of assembling and fixing the upper frame 1, the lower frame 2 and the stay holder 3 having the above structure will be described. The lower frame 2 is inserted from the lower opening side of the upper frame 1, and the upper plate 15 of the upper frame 1 and the upper frame plate 25 of the lower frame 2 correspond to the axial length of the body portion 31 of the stay holder 3 as shown in FIG. The front frame plate 26 and the rear frame plate 27 of the lower frame 2 are superposed on the front plate 16 and the rear plate 17 of the upper frame 1, and the spots are welded to each other. In this case, the through hole 40 of the upper frame 1 and the through hole 50 of the lower frame 2 are arranged at positions facing each other. On the other hand, FIG.
As shown in, the left side frame portion 1 of the upper frame 1
The left frame portion 21 and the right frame portion 22 of the lower frame 2 are overlapped with the side plates 19 and 19 of the second and right side frame portions 13, and the overlapping portion is spot-welded. As described above, the upper frame 1 and the lower frame 2 have an integrated structure, and a highly rigid frame is formed.

As described above, as shown in FIG. 1, the first holder holding piece 42 is formed on the upper frame portion 11 of the upper frame 1 so as to hang down, and the upper frame portion 2 of the lower frame 2 is formed.
At 0, the second holder holding piece 52 is formed so as to rise upward, and these are formed around the left and right front and rear sides of the through holes 40 and 50. Therefore, as shown in FIG. 9, the first and second holder holding pieces 42, 52 form an inner hole contour having substantially the same diameter as the inner diameters of the through holes 42, 52.

As shown in FIGS. 7 and 8, the stay holder 3 is inserted from the through hole 40 of the upper frame 1 toward the through hole 50 of the lower frame 2. In this case, the wedge-shaped portion 32
Has a larger diameter than the through holes 40 and 50, but because of the slit 34 it can be inserted with a reduced diameter. In the stay holder 3, the lower surface of the head portion 30 abuts on the upper surface of the upper plate 15 of the upper frame portion 11 as shown in the figure, and the step surface 33 of the wedge-shaped portion 32 is formed on the lower surface of the upper frame plate 25 of the upper frame portion 20 of the lower frame 2. Is held in contact with. Further, the stay holder 3 is smoothly inserted by being guided by the contour of the inner hole formed by the first and second holder holding pieces 42 and 52, and the outer periphery of the body portion 31 is fixed as shown in FIGS. 7 and 9. It is retained by the inner bore contour. As described above, the stay holder 3 is firmly held by the upper frame 1 and the lower frame 2. Therefore, by mounting the headrest in the center hole 35 of the stay holder 3, the headrest is firmly held.

[0019]

The structure of one embodiment of the frame structure of the seat according to the present invention has been described above. According to the frame structure of the seat according to claim 1 of the present invention, the upper frame part and the left and right side plate parts are provided. A substantially inverted U-shaped upper frame, a square frame-shaped lower frame that is fixed to the upper frame by being combined with the upper frame, and the upper frame portion of the lower frame and the upper frame portion of the upper frame. The stay holder is configured to be inserted between the holes. The stay holder includes first and second stay holes formed downward and upward from elongated holes formed by sandwiching the through holes of the upper frame portion and the upper frame portion. Since it is formed so as to be held by the holder holding piece, it is not necessary to join many components by welding etc. as in the prior art, the number of parts is reduced, and the assembly workability is improved. As the amount cost can be reduced, the upper frame and the lower frame the frame strength is improved because the combined. The stay holder inserted between the upper frame portion of the upper frame and the through hole of the upper frame portion of the lower frame is held by the upper frame portion and the first and second holder holding pieces cut and raised from the upper frame portion. Therefore, when the stay holder is inserted, the stay holder is guided and easily inserted, and since the stay holder is held in the front, rear, left and right, it is possible to sufficiently withstand the impact from the headrest. Further, since the first and second holder holding pieces are not provided with special parts by welding or the like, the number of parts and cost can be reduced.

Further, according to the frame structure of the seat according to the second aspect of the present invention, the upper frame portion and the upper frame portion overlap each other with members having a U-shaped cross section having openings downward and upward. Since the hollow box body is formed, the portion where the headrest is supported has high strength, the holding strength of the headrest is improved through the stay holder supported by the hollow box body, and impact from the headrest and seat back It is possible to sufficiently withstand impact loads and ensure strength.

According to the present invention, the number of constituent parts is reduced,
In addition, the number of welding points is reduced as much as possible to improve assembly workability, weight reduction, and cost reduction, and the structure that the upper frame and lower frame are combined and integrated to improve the frame strength, and the stay holder mounting work It is possible to obtain a frame structure of a seat that can easily hold the stay holder stably without providing a special member.

[Brief description of drawings]

FIG. 1 is a perspective view showing an overall structure of a frame structure of a seat according to the present invention.

FIG. 2 is a perspective view showing a structure of an upper frame according to the present invention.

FIG. 3 is a partial perspective view showing a detailed structure around a mounting portion of a stay holder of an upper frame according to the present invention.

FIG. 4 is a perspective view showing the structure of a lower frame according to the present invention.

FIG. 5 is a partial perspective view showing a detailed structure around a mounting portion of a stay holder of a lower frame according to the present invention.

FIG. 6 is a perspective view showing an external structure of a stay holder according to the present invention.

FIG. 7 is an enlarged cross-sectional view taken along the line AA of FIG. 2 showing an engagement state of the stay holder according to the present invention and mainly the first holder holding piece.

FIG. 8 is an enlarged cross-sectional view taken along line BB of FIG. 4, showing an engagement state of the stay holder according to the present invention and mainly the second holder holding piece.

9 is an enlarged sectional view taken along line CC of FIG.

FIG. 10 is a perspective view showing a frame structure of a conventional seat.

[Explanation of symbols]

 1 Upper Frame 2 Lower Frame 3 Stay Holder 11 Upper Frame Part 12 Left Side Frame Part 13 Right Side Frame Part 14 Opening 15 Upper Plate 16 Front Plate 17 Rear Plate 18 Edge Plate 19 Side Plate 20 Upper Frame Part 21 Left Frame Part 22 Right Frame Part 23 Lower frame part 24 Opening part 25 Upper frame plate 26 Front frame plate 27 Rear frame plate 30 Head part 31 Body part 32 Wedge part 33 Step surface 34 Slit 35 Center hole 40 Through hole 41 Long hole 42 First holder holding piece 43 edge 50 through hole 51 long hole 52 second holder holding piece 53 edge

Claims (2)

[Claims] 1. A substantially inverted U-shaped upper frame that integrally forms an upper frame portion and left and right side frame portions extending downward from the left and right ends thereof, and is fixed in combination with the upper frame. A frame structure for a seat having a lower frame-shaped lower frame, and a stay holder for holding a headrest that is inserted into and supported by an upper frame part of the lower frame and the upper frame part of the upper frame, wherein the upper frame Portion and upper frame portion are formed with a through hole into which the stay holder is inserted, and the upper frame portion has a first stay holder holding piece cut and raised downward from an elongated hole formed with the through hole interposed therebetween. And a second stay holder holding piece that is cut and raised upward from an elongated hole formed by sandwiching the through hole, is provided in the upper frame portion. A frame structure for a seat, wherein the da retaining piece and the first stay holder retaining piece are arranged substantially orthogonal to each other. 2. The upper frame portion is formed of a member having a U-shaped cross section in cross section, and the upper frame portion is formed of a member having a U-shaped cross section in which upper opening is formed. The frame structure for a seat according to claim 1, wherein the upper frame portion is polymerized to form a hollow box body.