JP2010052455A - Frame structure of vehicular seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a frame structure of a vehicular seat that includes side frames which are easy to form and have strong strength. <P>SOLUTION: The frame structure 1 of the vehicular seat includes a right and left pair of the side frames 2, which are disposed at the right and left lower parts of the vehicular seat. The side frames 2 each include: a plate-like frame body 2a; a lower end flange 2b, which is extended approximately in the horizontal direction from the lower end edge of the frame body 2a and which is attached to the floor 15 of a vehicle; and a rear end flange 2c, which is bent from the rear end edge of the frame body 2a and extended being separated from the lower end flange 2b. A connecting member 5, which integrally have a lower side piece 5a, which is attached to the upper surface of the lower end flange 2b, a rear side piece 5b, which is attached to the front surface of the rear end flange 2c, and a bent part 5c, which connects the lower side piece 5a and the rear side one 5b, is provided between the lower end flange 2b and the rear end one 2c to connect these flanges. The lower end flange 2b has an extension part 2b2, which is extended to the lower side of the bent part 5c of the connecting member 5. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a frame structure of a vehicle seat mounted on a vehicle such as a vehicle.

The frame structure of a vehicle seat generally has a pair of left and right side frames disposed at the left and right lower portions of the seat, and the side frames are attached to the floor of the vehicle directly or via a slide device. (See Patent Document 1). The side frame has a plate-like frame main body and a flange provided on the outer peripheral edge of the frame main body in order to improve the strength of the frame main body. The flange is formed by deep drawing, for example, and is formed continuously from the lower end edge, the rear end edge, and the upper end edge of the frame body.
JP 2004-122825 A

  However, it may not be easy to continuously form the flange along the outer peripheral edge of the frame body. For example, when the flange is formed by bending, or when the flange is desired to be raised. On the other hand, when the flange is not continuously formed along the outer peripheral edge of the frame body, there arises a problem that the strength is weakened. Then, this invention makes it a subject to provide the frame structure of the vehicle seat provided with the side frame which is easy to shape | mold and strong.

  In order to solve the above-mentioned problems, the present invention is characterized by a frame structure of a vehicle seat having a configuration as described in each claim. According to the first aspect of the present invention, the frame structure has a pair of left and right side frames disposed at the left and right lower portions of the vehicle seat. The side frame has a plate-like frame main body, a lower end flange extending substantially horizontally from the lower end edge of the frame main body and attached to the floor of the vehicle, and bent from the rear end edge of the frame main body and separated from the lower end flange. The rear end flange is extended. Between the lower end flange and the rear end flange, in order to connect them, a lower piece attached to the upper surface of the lower end flange, a rear piece attached to the front face of the rear end flange, and these lower piece and rear side A coupling member that integrally has a bent portion that connects the pieces is provided. The lower end flange has an extending portion that extends to the lower side of the bent portion of the coupling member.

  Therefore, since the lower end flange and the rear end flange are separated from each other, these flanges can be easily formed by bending. Also, the height of the flange can be increased. Moreover, the lower end flange and the rear end flange are coupled by a coupling member. Therefore, the strength of the side frame is increased by the coupling member. Moreover, since the lower end flange has an extending portion that extends to the lower side of the bent portion of the coupling member, the strength of the frame structure is increased. For example, since the coupling member is attached to the upper surface of the lower end flange, if the coupling member is longer to the rear than the lower end flange, a gap is formed between the coupling member and the floor side member (gap 2b6 described in FIG. 5). See). However, the extending portion of the lower end flange extends to the lower side of the bent portion of the coupling member. Therefore, the extension part can prevent or reduce the formation of the gap (gap 2b6). Therefore, even when the vehicle receives a collision from the rear and the rear part of the side frame receives a downward force, the connecting part may be deformed toward the gap formed between the floor side member and the extension part. Can be prevented (less). As a result, the rearward tilt angle of the vehicle seat can be prevented from changing due to the deformation.

  According to the second aspect of the present invention, the lower end flange bends and extends from the frame body, and extends rearward from the rear end portion of the flange body portion to the lower side of the bending portion of the coupling member. It has an extending part. Further, the extending portion is narrower in the left-right direction than the flange main body and is separated from the frame main body. Therefore, since the extension portion is narrower than the flange main body portion, the extension portion can be formed to be light and inexpensive. Further, since the extending portion is separated from the frame main body, it is not necessary to bend the frame main body during bending. Therefore, the lower end flange can be easily formed.

  According to the third aspect of the present invention, the frame main body of the side frame has a single plate shape and has a height from the vicinity of the floor to the vicinity of the upper surface of the seat cushion. Therefore, since the side frame is formed by a single plate-like frame main body, it can be easily formed as compared with a vertically divided form. Further, the frame body is larger than the vertically divided form, but a sufficient strength can be obtained by a coupling member or the like (see claim 1).

  According to the fourth aspect of the present invention, the lower end flange and the extended portion of the lower end flange are disposed on the upper surface of the upper rail of the slide device including the lower rail mounted on the floor and the upper rail slidably attached to the lower rail. Accordingly, the lower end flange is attached to the floor side through the slide device. Since the upper rail is generally made of metal, it is harder than the floor on which the carpet is laid. Therefore, it is easier to form a gap between the upper rail and the coupling member than when the lower end flange is directly attached to the floor. On the other hand, the lower end flange has an extending portion disposed on the upper surface of the upper rail. Therefore, this gap can be reliably filled with the extending portion.

  An embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, a vehicle seat 10 is a seat mounted on a vehicle such as a vehicle (for example, an automobile), and includes a seat cushion 11 and a seat back 12. The seat cushion 11 and the seat back 12 have a frame (cushion frame 11a and back frame 12a) which is a constituent member of the frame structure 1, and pads 11b and 12b attached to the frames 11a and 12a. The frames 11a and 12a are connected by a reclining device 13 so that the angle can be adjusted.

  As shown in FIG. 1, the cushion frame 11 a has a pair of left and right side frames 2 disposed at the left and right lower portions of the vehicle seat 10 and a reinforcing rod 3 that connects between the rear upper portions of the side frames 2. . The side frame 2 is plate-shaped and has a height from the vicinity of the floor 15 to the vicinity of the upper surface of the seat cushion 11 and constitutes a side wall portion of the seat cushion 11.

  As shown in FIG. 2, the side frame 2 has a single plate-like frame body 2a and a plurality of flanges (a lower end flange 2b, a rear end flange 2c, and an upper end flange 2d) formed on the outer periphery of the frame body 2a. is doing. The lower end flange 2b extends from substantially the entire length of the lower end edge of the frame body 2a toward the seat inner side. The lower end flange 2b has a short length in the left-right direction, a long length in the front-rear direction, and extends substantially horizontally.

  As shown in FIG. 2, the rear end flange 2c extends from the substantially entire length of the rear end edge of the frame main body 2a toward the inside of the seat. The rear end flange 2c has a short length in the left-right direction, a long length in the up-down direction, an obtuse angle with respect to the lower end flange 2b, and is inclined rearward. The upper end flange 2d extends from substantially the entire length of the upper end edge of the frame body 2a toward the seat inner side. The upper end flange 2d has a short length in the left-right direction, a long length in the front-rear direction, and extends substantially horizontally. These flanges 2b to 2d are formed by bending or the like with respect to the frame main body 2a, and are in a positional relationship apart from each other.

  The side frame 2 is attached to the floor 15 side through a slide device 14 as shown in FIGS. The slide device 14 has a lower rail 14a and an upper rail 14b. The lower rail 14a is attached to the floor 15, and the upper rail 14b is slidably attached to the lower rail 14a. A lock mechanism 14c is provided between the lower rail 14a and the upper rail 14b so as to lock them so that they cannot slide. Bolts 17 are erected on the upper rail 14 b, and the lower end flange 2 b of the side frame 2 and the coupling member 5 are attached to the bolts 17.

  The coupling member (patch) 5 is L-shaped as shown in FIGS. 2 and 3, and integrally includes a lower piece 5a, a rear piece 5b, and a bent portion 5c for connecting them. The bent portion 5c connects the lower piece 5a and the rear piece 5b at an obtuse angle. The lower piece 5a has a mounting hole 5a1 through which the bolt 17 is inserted. An attachment hole 2b3 formed in the lower end flange 2b of the side frame 2 and an attachment hole 5a1 in the lower piece 5a are inserted into the bolt 17, and then a nut 18 is screwed. As a result, the lower end flange 2b is attached to the upper surface of the upper rail 14b, and the lower piece 5a is attached to the upper surface of the lower end flange 2b. The rear piece 5b is installed on the front surface of the rear end flange 2c of the side frame 2, and is attached to the rear end flange 2c by welding.

  As shown in FIGS. 3 and 4, the lower end flange 2 b integrally has a flange main body 2 b 1 and an extension 2 b 2. The flange main body 2b1 extends from the substantially entire length of the lower end edge of the frame main body 2a toward the seat inner side. The left and right width of the flange main body 2b1 is set to be approximately equal to the left and right width of the upper rail 14b. The extending part 2b2 extends rearward from the rear end edge of the flange main body part 2b1 to the lower side of the bent part 5c of the coupling member 5. Specifically, the extension 2b2 extends rearward from the extension line of the rear piece 5b of the coupling member 5.

  Therefore, as shown in FIG. 5, the extension 2b2 can fill the gap 2b6 formed when there is no extension 2b2, that is, the gap 2b6 between the lower piece 5a and the upper rail 14b. Thereby, the extension part 2b2 prevents the coupling member 5 from being deformed downward toward the gap 2b6 by an external force.

  As shown in FIG. 3, the left-right width of the extending part 2b2 is narrower than the left-right width of the flange body part 2b1. The left and right width of the flange main body 2b1 is narrower than the left and right width of the rear end flange 2c. The center position of the left and right width of the extending portion 2b2 is located on the seat inner side than the center position of the left and right width of the flange body 2b1, and substantially coincides with the extension line of the center position of the left and right width of the rear end flange 2c. The sheet inner edge of the extension part 2b2 is located on the same line as the sheet inner edge of the flange main body part 2b1. The extending part 2b2 is separated from the frame body 2a, and a gap 2b4 is formed between the extension part 2b2 and the frame body 2a. The extending part 2b2 and the rear end flange 2c are also separated, and a gap 2b5 is formed between them.

  As shown in FIG. 1, a rod 4 is attached between the front upper portions of the pair of side frames 2 so as to be rotatable about an axis. An operation lever 8 is attached to one end of the rod 4 penetrating the side frame 2 so as not to rotate. The link 6 is attached to the seat inner side position than the side frame 2 at both ends of the rod 4 so as not to rotate. One end of the link 6 is connected to a connecting member 7 connected to the lock mechanism 14c.

  Accordingly, by pulling the front portion of the operation lever 8 upward, the rod 4 rotates in the axial direction and the left and right links 6 tilt. Then, the connecting member 7 is moved downward by the link 6, the left and right lock mechanisms 14c are unlocked, and the upper rail 14b can slide with respect to the lower rail 14a. Thus, the seat body can slide with respect to the floor 15.

  As described above, the side frame 2 includes the frame body 2a, the lower end flange 2b, and the rear end flange 2c as shown in FIGS. A connecting member 5 is provided between the lower end flange 2b and the rear end flange 2c to connect them. The lower end flange 2 b has an extending portion 2 b 2 that extends to the lower side of the bent portion 5 c of the coupling member 5.

  Therefore, since the lower end flange 2b and the rear end flange 2c are separated from each other, the flanges 2b and 2c can be easily formed by bending. Further, the height of the flanges 2b and 2c can be increased. Further, the lower end flange 2 b and the rear end flange 2 c are coupled by the coupling member 5. Therefore, the strength of the side frame 2 is increased by the coupling member 5. Further, the lower end flange 2 b has an extending portion 2 b 2 that extends to the lower side of the bent portion 5 c of the coupling member 5. Therefore, the strength of the frame structure 1 is increased. For example, since the coupling member 5 is attached to the upper surface of the lower end flange 2b, when the coupling member 5 is longer rearward than the lower end flange 2b, a gap 2b6 is formed between the coupling member 5 and the member on the floor 15 side. (See FIG. 5).

  However, the extending portion 2 b 2 of the lower end flange 2 b extends to the lower side of the bent portion 5 c of the coupling member 5. Therefore, the extension part 2b2 can prevent or reduce the formation of the gap 2b6. Therefore, even when the vehicle receives a collision from the rear and the rear part of the side frame 2 receives a downward force, the coupling member 5 is deformed toward the gap 2b6 formed between the floor 15 and the member. Can be prevented (reduced) by the extension 2b2. As a result, the rearward tilt angle of the vehicle seat 10 can be prevented from changing due to the deformation.

  Further, as shown in FIG. 3, the extending portion 2b2 has a narrower width in the left-right direction than the flange main body portion 2b1, and is separated from the frame main body 2a. Therefore, since the extension part 2b2 is narrower than the flange main body part 2b1, the extension part 2b2 can be formed at a low cost. Further, since the extending portion 2b2 is separated from the frame main body 2a, it is not necessary to bend the frame main body 2a during bending. Therefore, the lower end flange 2b can be easily formed.

  The frame main body 2a of the side frame 2 is a single plate as shown in FIG. 2 and has a height from the vicinity of the floor 15 to the vicinity of the upper surface of the seat cushion 11. Therefore, since the side frame 2 is formed by the single plate-like frame main body 2a, the side frame 2 can be easily formed as compared with the vertically divided form. The frame body 2a is larger than the vertically divided form, but sufficient strength can be obtained by the coupling member 5 and the like.

  Further, the extension 2b2 of the lower end flange 2b is disposed on the upper surface of the upper rail 14b of the slide device 14 as shown in FIG. Therefore, the lower end flange 2 b is attached to the floor 15 side through the slide device 14. Since the upper rail 14b is made of metal, it is harder than the floor 15 on which the carpet is laid. Therefore, compared with the case where the lower end flange 2 b is directly attached to the floor 15, a gap is easily formed between the upper rail 14 b and the coupling member 5. On the other hand, the lower end flange 2b has an extending portion 2b2 disposed on the upper surface of the upper rail 14b. Therefore, this gap can be reliably filled with the extending portion 2b2.

(Other embodiments)
The present invention is not limited to the above-described embodiment, and may be the following form.
(1) The side frame 2 of the above embodiment has a single plate-like frame body 2a. However, the side frame has an upper plate portion and a lower plate portion (frame main body), and a leg portion that couples them so that height adjustment is impossible or height adjustment is possible, and the lower plate portion (frame main body) is the lower end. The form provided with a flange and a rear-end flange may be sufficient.
(2) The lower end flange 2b and the rear end flange 2c of the above embodiment extend from the end edge of the frame body 2a to the inside of the seat. However, these may extend from the edge of the frame body to the outside of the seat.
(3) The extending part 2b2 of the above embodiment has a lateral width that is narrower than the lateral width of the flange body part 2b1. However, the extending portion may have a shape that is substantially the same as the left and right width of the flange body or a wide left and right width.
(4) In the coupling member 5 of the above embodiment, the lower piece 5a is attached to the lower end flange 2b by the bolt 17 and the nut 18, and the rear piece 5b is attached to the rear end flange 2c by welding. However, these may be mounted by other methods, for example, by an adhesive.
(5) The lower end flange 2b of the above embodiment is attached to the floor 15 via the upper rail 14b. However, the lower end flange 2b may be directly attached to the floor 15.

It is a perspective view of a vehicle seat. It is a perspective view of the frame structure in the vicinity of the right side frame. FIG. 3 is a partially enlarged perspective view of FIG. 2 in the vicinity of a coupling member. It is a partial side view of the frame structure corresponding to FIG. It is a partial side view of the frame structure corresponding to FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Frame structure 2 ... Side frame 2a ... Frame main body 2b ... Lower end flange 2b1 ... Flange main body 2b2 ... Extension part 2b4-2b6 ... Gap 2c ... Rear end flange 2d ... Upper end flange 3 ... Reinforcing rod 4 ... Rod 5 ... Coupling Member 5a ... Lower piece 5b ... Rear piece 5c ... Bending portion 10 ... Vehicle seat 11 ... Seat cushion 11a ... Cushion frame 12 ... Seat back 12a ... Back frame 14 ... Slide device 14a ... Lower rail 14b ... Upper rail 15 ... Floor

Claims (4)

A frame structure for a vehicle seat,
It has a pair of left and right side frames arranged at the left and right lower parts of the vehicle seat,
The side frame includes a plate-shaped frame main body, a lower end flange extending substantially horizontally from a lower end edge of the frame main body and attached to a vehicle floor, and a lower end bent from the rear end edge of the frame main body and the lower end Having a rear end flange extending away from the flange;
Between the lower end flange and the rear end flange, in order to connect them, a lower piece attached to the upper surface of the lower end flange, a rear piece attached to the front face of the rear end flange, and the lower side A coupling member integrally having a bent portion for connecting the piece and the rear piece is provided,
The frame structure of a vehicle seat, wherein the lower end flange has an extending portion that extends to a lower side of a bent portion of the coupling member. The vehicle seat frame structure according to claim 1,
The lower end flange has a flange main body portion that bends and extends from the frame main body, and an extension portion that extends rearward from the rear end portion of the flange main body portion to the lower side of the bending portion of the coupling member,
A frame structure for a vehicle seat, wherein the extension portion has a width in the left-right direction narrower than that of the flange main body portion and is separated from the frame main body. The vehicle seat frame structure according to claim 1 or 2,
The frame structure of a vehicle seat, wherein the frame body of the side frame is a single plate and has a height from the vicinity of the floor to the vicinity of the upper surface of the seat cushion. The vehicle seat frame structure according to any one of claims 1 to 3,
A vehicle seat frame, comprising: a lower rail mounted on a floor; and an upper rail of a sliding device including an upper rail slidably attached to the lower rail, wherein a lower end flange and an extending portion of the lower end flange are disposed on an upper surface of the upper rail. Construction.

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