JP2017218153A - Vehicle seat frame structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat frame structure which achieves effective reinforcement of the frame structure.SOLUTION: A frame structure comprises: a seat cushion frame 2 including a rear frame 7, a front frame 8, and a side frame 9; and a seat back frame 12. The side frame 9 is formed into a section channel shape, and a pivot bracket 10 similarly formed into a section channel shape and fastened to the rear frame 7 is fitted in a rear end part of the side frame 9 to fasten thereto.SELECTED DRAWING: Figure 5

Description

  The present invention provides a seat cushion frame that includes a rear frame, a front frame disposed in front of the rear frame, and a pair of left and right side frames that connect both ends of the rear and front frames to support the seat cushion. And a frame structure of a vehicle seat which is connected to the rear portion of the seat cushion frame and supports a seat back.

  Such a frame structure of a vehicle seat is known as disclosed in Patent Document 1 below.

Utility Model Registration No. 2549114

  In the conventional frame structure of a vehicle seat, the central part of the rear part and the front part are connected via a single central part frame. In such a case, when the seat back frame receives a forward load from the rear, the load acts on the central frame in the axial direction, so the central frame effectively supports the load by compressive stress. However, when the seat back frame receives a forward load upward (above the reclining mechanism), a large torsional moment acts on the rear frame from the seat back frame via the reclining mechanism. In order to strengthen the torsional rigidity of the rear frame by the central frame of the book, it is necessary to sufficiently increase the diameter of the single central frame, which makes it difficult to reduce the weight.

  The present invention has been made in view of such circumstances, and an object of the present invention is to provide a frame structure of the vehicle seat that can effectively enhance the frame structure.

  In order to achieve the above object, the present invention includes a rear frame, a front frame disposed in front of the rear frame, and a pair of left and right side frames that connect both ends of the rear and front frames. In a vehicle seat frame structure comprising a seat cushion frame that supports a seat cushion and a seat back frame that is connected to a rear portion of the seat cushion frame to support a seat back, the side frame is formed in a channel-shaped cross section. The first feature is that the pivot bracket, which has the same channel shape as that of the cross section and is fixed to the rear frame, is fixedly fitted to the rear end of the side frame.

  In addition to the first feature, the second feature of the present invention is that the side frame and the pivot bracket are fastened with bolts at the bottom.

  Furthermore, in addition to the first or second feature, the present invention has a third feature that a reinforcing rod is bent at the left and right upper edges of the side frame.

  Furthermore, in addition to the third feature, the present invention is characterized in that a cover member disposed on the front side of the side frame is fixed to the reinforcing rod with a bolt or a clip. The rail cover 58 of the embodiment corresponds to the cover member of the present invention.

  In addition to the fourth feature of the present invention, a notch opening forward is provided at the front end of the side frame, and a protrusion provided on the cover member is engaged with the notch. This is a fifth feature.

  Furthermore, in the present invention, in addition to the fourth or fifth feature, a locking hole is provided in the side frame, and a locking claw provided in the cover member is engaged with the locking hole. This is the sixth feature.

  According to a feature of the present invention, the side frame is formed in a cross-sectional channel shape, and also has a cross-sectional channel shape, and a pivot bracket fixed to the rear frame is fitted and fixed to the rear end portion of the side frame. Therefore, the rear frame is connected to the high-rigidity side frame via the high-rigidity pivot bracket, and the connection strength between the rear frame and the side frame can be enhanced.

The perspective view of the back seat for vehicles concerning the embodiment of the present invention. The frame system perspective view of the said rear seat. The perspective view seen from the lower part of the seat cushion frame. FIG. 4 is a sectional view taken along line 4-4 of FIG. The principal part perspective view of a slide lock apparatus. The perspective view around the release bar of the slide lock device. The perspective view around a rail cover. FIG. 8 is a view (plan view) taken along arrow 8 in FIG. 7. FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. 8. FIG. 10 is a view (bottom view) taken along arrow 10 in FIG. 9. The perspective view around the latching claw of a rail cover. FIG. 12 is an enlarged sectional view taken along line 12-12 of FIG. FIG. 13 is an enlarged sectional view taken along line 13-13 in FIG. 1; 12 is an enlarged cross-sectional view of 12 parts in FIG. FIG. 15 is an enlarged sectional view taken along line 15-15 in FIG. 14; FIG. 16 is a view taken along arrow 16 in FIG. 2. The perspective view around the buckle for seat belts. FIG. 16 is a view corresponding to FIG. 15 showing another embodiment of the present invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, front and rear and left and right are based on the automobile on which the seat of the present invention is installed.

  1 and 2, a rear seat 1 as an automobile seat includes a seat cushion frame 2, a seat cushion 3 having a pair of left and right seating portions 3a mounted on the seat cushion frame 2, and a seat. A pair of left and right seat backs 5 are connected to the rear end of the cushion frame 2 via a reclining mechanism 4.

  2 to 4, the seat cushion frame 2 includes a pipe-shaped rear frame 7 extending in the left-right direction, and a pipe-shaped pipe having a smaller diameter than the rear frame 7 disposed in front of the rear frame 7 in parallel therewith. The front frame 8 and a pair of left and right side frames 9 that integrally connect the left and right ends of the rear and front frames 7 and 8 are provided. Pivot brackets 10 are welded to the left and right ends of the rear frame 7. Each pivot bracket 10 has a cross-sectional channel shape (see FIG. 4), which is fitted inside a side frame 9 having a cross-sectional channel shape, and the bottoms of both are fastened with bolts 11, The part frame 9 is integrally connected to the rear frame 7. Reinforcing rods 9 a are bent at the upper left and right edges of the side frame 9. Thus, the rear frame 7 is connected to the high-rigidity side frame 9 via the high-rigidity pivot bracket 10, and the connection strength between the rear frame 7 and the side frame 9 is strengthened.

  A box-shaped intermediate strength member 13 is welded to the center of the rear frame 7. The intermediate strength member 13 is composed of a pair of left and right member halves 13a and 13b that are welded with their open ends fitted to each other. The intermediate strength member 13 is welded to the rear ends of a pair of upper and lower central frames 14 and 15. At that time, the rear end of the upper central frame 14 is welded to the front surface of the intermediate strength member 13 at a position above the center of the rear frame 7, and the rear end of the lower central frame 15 is pushed flatly up and down. It is crushed and welded to the lower surface of the intermediate strength member 13 at a position below the center of the rear frame 7.

  The front end portions of the central frames 14 and 15 are flattened up and down and welded to the upper surface and the lower surface of the front frame 8, respectively.

  Reclining brackets 24 that support one end of the reclining mechanism 4 are coupled to the left and right side walls of the intermediate strength member 13 by bolts. The other end of each reclining mechanism 4 is supported by a side frame 71 (described later) welded to one side of the seat back frame 12 of each seat back 5. The pivot bracket 32 welded to one side of the seat back frame 12 is connected to the pivot bracket 10 on the seat cushion frame 2 side via the pivot shaft 16.

  A plurality of wires 17 arranged in a lattice shape are welded to the seat cushion frame 2, and the bottom plate of the seat cushion 3 is supported by these wires 17.

  Thus, for example, when the own vehicle is collided from the following vehicle and a large forward load is applied to the upper portion of the seat back 5 from the luggage in the rear luggage compartment, the load is passed through the reclining mechanism 4 and the intermediate strength member 13. The rear frame 7 acts as a torsional moment, and the intermediate strength member 13 is welded to the rear end portions of a pair of upper and lower central frames 14 and 15 arranged vertically with the center of the rear frame 7 in between. Since the front end portions of the center frames 14 and 15 are welded to the upper and lower surfaces of the front frame 8, the intermediate strength member 13, the center frames 14 and 15 and the front frame 8 constitute one truss structure, The torsional moment is supported by the compressive stress generated in the upper central frame 14 and the tensile stress generated in the lower central frame 15. Therefore rear frame 7 is made to have a strong torsional rigidity, it is possible to suppress the torsional deformation of the rear frame 7 effectively.

  When a forward load is applied to the intermediate strength member 13, that is, the central portion of the rear frame 7, the bending rigidity of the rear frame 7 is enhanced by the compressive stress generated in the upper and lower central frames 14 and 15. The bending deformation of the rear frame 7 can be suppressed.

  Further, the rear end portion of the lower central frame 15 is flattened up and down and welded to the lower surface of one or both of the left and right intermediate strength members 13, so that a wide welding range is secured and the strength of the welded portion is increased. Not only can the height be increased, but a sufficient distance can be secured between the rear end portion of the lower central frame 15 and the floor of the vehicle body.

  In addition, the front end portions of the upper and lower central frames 14 and 15 are flattened up and down and welded to the upper and lower surfaces of the front frame 8, respectively, so that a wide welding range is secured to increase the strength of the welded portion. Thus, the size of the periphery of the front frame 8 can be reduced, and a sufficient distance can be secured between the front end portion of the lower central frame 15 and the floor surface of the vehicle body.

  As shown in FIG. 17, the buckles 18 that connect the tongue plates of the seat belt are connected to the side walls of the left and right intermediate strength members 13 by bolts 19, respectively. The left and right buckles 18 are respectively provided with sensors (not shown) for detecting that the tongue plates are connected to them, and lead wires 20 connected to these sensors are provided from the outer surfaces of the left and right buckles 18. It is extended.

  A lead wire holder 21 disposed between the upper and lower central frames 14, 15 is fixed to the lower central frame 15 or the upper central frame 14, and the lead wire 20 is attached to the lead wire holder 21. A plurality of clips 22 to be held are mounted. The left and right lead wires 20 are held by a clip 22 and then bundled together, and a connector 23 is connected to the end thereof. The connector 23 is connected to another connector (not shown) connected to a display device that displays the presence / absence of connection of the tongue plate to the buckle 18.

  In this way, the lead wire holder 21 that supports the lead wire 20 via the clip 22 is attached to the lower central frame 15 or the upper central frame 14 and is disposed between the upper and lower central frames 14 and 15. Therefore, the dead space between both the central frames 14 and 15 can be effectively used for installing the lead wire holder 21.

  Next, in FIG. 2 and FIG. 5, a pair of left and right movable rails 25 extending in the front-rear direction are bolted to the lower surfaces of the left and right side frames 9 of the seat cushion frame 2. A pair of left and right fixed rails 27 laid on the floor 26 and extending in the front-rear direction are slidably supported. Between these movable and fixed rails 25 and 27, a known slide lock mechanism 28 capable of selectively locking the rear seat 1 at a plurality of front and rear adjustment positions is provided, and the lock state of the slide lock mechanism 28 is released. Each release lever 29 is pivotally supported by each movable rail 25, and each release lever 29 is connected to a lock spring 30 that urges the release lever 29 in the lock operation direction of the slide lock mechanism 28.

  The left and right release levers 29 are connected to both ends of a common release bar 31. The release bar 31 is formed by bending one round bar, and a pair of left and right arm portions 31a extending forward from the left and right release levers 29, and a flange portion that integrally connects the front end portions of the arm portions 31a. The flange 31b is arranged in parallel with the front edge of the seat cushion 3 at the lower part of the seat cushion 3. A knob 33 is continuously provided at a central portion of the flange portion 31b corresponding to an intermediate position between the left and right seating portions 3a. The knob 33 is bent toward the flange 31b side from the left and right ends of the grip 33a and the U-shaped grip 33a projecting from the center front of the flange 31b so as to face the front of the seat cushion 3. It consists of a pair of left and right support portions 33b extending outward in the left and right directions, and both the support portions 33b are welded to the flange portion 31b over substantially the entire length thereof.

  Since the grip portion 33a of the knob 33 enters the field of view of the occupant sitting on the left and right seat portions 3a, the occupant can immediately grip the grip portion 33a of the knob 33 and pull it upward. There is no worry of getting your hands dirty by touching the fixed rails 25, 27, etc. When the knob 33 is pulled up, the release bar 31 swings upward together with the release lever 29 to release the locked state of the slide lock mechanism 28. Therefore, the movable rail 25 slides back and forth, that is, the rear seat 1 It can move back and forth. When the front and rear positions of the rear seat 1 are adjusted and then the knob 33 is released, the slide lock mechanism 28 is activated by the action of the lock spring 30 to lock the rear seat 1 in the adjusted position.

  Further, as described above, the left and right support portions 33b of the knob 33 are welded to the flange portion 31b over substantially the entire length thereof, and the rigidity of the flange portion 31b is effectively strengthened. It can be accurately and simultaneously transmitted to the left and right slide lock mechanisms 28 via the release bar 31 to release the locked state. Further, by increasing the rigidity of the release bar 31, the diameter of the release bar 31 can be reduced, which can contribute to weight reduction.

  As shown in FIGS. 12 and 13, a lateral groove portion 34 for receiving the front frame 8 is formed on the lower surface of the seat cushion 3, and the flange portion 31 b of the release bar 31 is disposed in the lateral groove portion 34. Is done. A notch 35 (see FIGS. 1 and 13) facing the grip 33a of the knob 33 is formed on the lower surface of the front end portion of the center portion of the seat cushion 3, and is connected to the notch 35 so as to move upward. A longitudinal groove portion 36 for receiving the central frame 14 is formed on the lower surface of the seat cushion 3.

  In the skin 39 that covers the surface of the cushion member 38 of the seat cushion 3, an extended skin 40 that extends backward beyond the lateral groove portion 34 is connected to the lower end of the skin 39 that covers the front end surface of the cushion member 38. A first hook 41 attached to the rear end of 40 is locked to the wire 17 of the seat cushion frame 2. Thus, the flange portion 31 b of the release bar 31 in the lateral groove portion 34 is covered with the skin 39.

  As shown in FIG. 6, a restricting plate 43 positioned immediately after the notch 35 is welded to the central portion of the front frame 8, and the restricting plate 43 extends downward to the knob 33. The restriction ring 44 disposed in the grip portion 33a is welded.

  As shown in FIG. 12, an opening 45 corresponding to the notch 35 is provided in the front center of the extended skin 40, and the grip 33 a of the knob 33 is exposed forward through this opening 45. . A long decorative piece 46 is connected to the upper edge of the opening 45 so as to cut the opening 45 vertically, and a short piece 47 shorter than the decorative piece 46 is connected to an intermediate portion of the decorative piece 46. A hook-and-loop fastener 48 is attached to the tip of the decorative piece 46, and a second hook 49 is attached to the tip of the short piece 47, respectively. A third hook 50 is attached to the lower edge of the opening 45.

  The short piece 47 extends rearward along the ceiling surface of the notch 35, the second hook 49 is locked to the restriction plate 43, and the third hook 50 is locked to the restriction ring 44. The decorative piece 46 is pulled backward by the short piece 47, extends downward, passes through the grip portion 33a from the upper side to the lower side, and then extends rearward while covering the central portion of the regulating ring 44 and the collar portion 31b. The hook and loop fastener 48 is joined to the lower surface of the extended skin 40. Thus, a wide and clean operation space 51 is defined in the cutout portion 35 for the passenger to hold the grip portion 33a and move up and down.

  Thus, the grip portion 33a of the knob 33 is exposed to the operation space 51 in the center portion of the seat cushion 3, that is, the notch portion 35 at the intermediate position between the left and right seat portions 3a, and sits on the left and right seat portions 3a. Since any occupant can visually recognize and is as close as possible to any occupant, any occupant immediately grasps the grip portion 33a and accurately lifts the release bar 31, and slides. The lock state of the lock mechanism 28 can be released, and the operation space 51 of the notch 35 is wide, so that the operability of the knob 33 is very good.

  Moreover, since the release bar 31 is covered with the extended skin 40 together with the support portion 33b of the knob 33, interference between the release bar 31 and other objects stored under the seat cushion 3 is avoided, and the occupant can seat the seat cushion. When the hand is turned to the lower surface of 3, the hand is not soiled by touching the collar 31b.

  Further, since the decorative piece 46 covers the center portion of the regulating ring 44 and the collar portion 31b, it is possible to maintain the aesthetic appearance and avoid that the occupant's hand gripping the grip portion 33a touches the central portion of the collar portion 31b. And you can prevent your hands from getting dirty.

  Furthermore, since the flange 31b of the release bar 31 is disposed below the front frame 8 in the lateral groove 34 on the lower surface of the cushion member 38 that receives the front frame 8, the deformation of the seat cushion 3 due to the weight of the occupant. The malfunction of the release bar 31 can be prevented without being affected. Moreover, since the flange 31b moves up and down in the lateral groove 34 as the knob 33 is moved up and down, it does not interfere with the extended skin 40 that covers the open lower surface of the lateral groove 34.

  Referring again to FIG. 6, a cable guide 53 erected from the upper surface and bent rearward in an arc shape is fixed to the restriction plate 43, and the outer cable 54 a of the Bowden cable 54 supported by the cable guide 53 is attached to the seat. The lower end of the cushion 3 extends to the rear luggage compartment and is supported by the seat back frame. The front end portion of the inner cable 54b guided by the outer cable 54a extends below the cable guide 53, and the release bar 31 is connected to a connection fitting 55 attached to the central portion of 31. An operation member (not shown) facing the luggage compartment is connected to the rear end of the inner cable 54b. When the inner cable 54b is pulled through the operation member, the release bar 31 is pulled up, and the lock state of the slide lock mechanism 28 can be released. As described above, the release bar 31 can be pulled up even on the luggage compartment side, so that the locked state of the slide lock mechanism 28 is released, the rear seat 1 is moved forward, and the luggage compartment can be enlarged and used. There is convenience.

  A pair of protective members 56 that protect the cable guide 53 are disposed on the left and right sides of the cable guide 53, and these protective members 56 are formed integrally with the restriction plate 43 and welded to the front frame 8.

  Next, in FIGS. 7 to 11, a synthetic resin rail cover 58 that covers the front end portions of the movable and fixed rails 25 and 27 is attached to the left and right side frames 9. For the attachment, a notch 59 opening forward and a locking hole 60 adjacent to the rear of the notch 59 are provided at the front end of the side frame 9. On the other hand, the rail cover 58 is opposed to the U-shaped inner cover portion 58a that covers the movable and fixed rails 25 and 27 from the front end surface to both the inner and outer side surfaces with a gap on the outer surface of the inner cover portion 58a. The U-shaped outer cover portion 58b and the common bottom portion 58c that integrally connect both the cover portions 58a and 58b, and a plurality of portions extending between the opposing surfaces of the inner cover portions 58a and 58b. A reinforcing rib 70 is formed.

  The inner cover portion 58 a includes a ceiling portion 61 that contacts the upper surface of the front end portion of the side frame 9, a convex portion 62 that protrudes from the ceiling portion 61 and engages with the notch 59, and a rear portion of the convex portion 62. A locking claw 63 is provided that rises upward from the end and engages with the locking hole 60 from below.

  Further, fixed arms 64 and 65 projecting upward are integrally formed on the outer and inner rear ends of the U-shaped outer cover portion 58b, and the outer fixed arms 64 are formed on the outer side of the side frame 9. The inner fixing arm 65 is fixed to the side surface 9 of the side frame 9 with the bolt 67 or clip. A plurality of reinforcing ribs 68 extending in the vertical direction are formed on the inner side surface or the outer side surface of each fixed arm 64, 65.

  When attaching the rail cover 58, first, the ceiling 61 of the inner cover 58a is placed on the upper surface of the front end of the side frame 9 in the inclined posture of the rail cover 58 with the rear end facing downward. When the convex portion 62 is engaged with the notch 59 of the side frame 9 and then the rail cover 58 is rotated horizontally with the convex portion 62 as a fulcrum, the locking claw 63 of the rail cover 58 is engaged with the side frame 9. It can be engaged with the stop hole 60. By doing so, the front end portion of the rail cover 58 can be fixed to the side frame 9 without using a fixing member such as a bolt.

  Thereafter, the outer fixed arm 64 is fixed to the outer surface of the side frame 9 with a bolt 66 or clip, and the inner fixed arm 65 is fixed to the reinforcing bar 9a of the side frame 9 of the side frame 9 with a bolt 67 or clip. If fixed, the rear end of the rail cover 58 can be fixed to the side frame 9, thereby preventing the locking claw 63 from being detached from the locking hole 60.

  As described above, the rail cover 58 can cover the front end portions of the fixed and movable rails 27 and 25 regardless of the back and forth movement of the movable rail 25 while being securely attached to the side frame. Moreover, it is possible to cover the ends of various rails having different structures, and is highly versatile.

  Next, in FIG. 2, FIG. 14 and FIG. 15, the following reinforcing structure is adopted for the pipe-like support column 12a on the left and right inner sides of the seat back frame 12. That is, a side frame 71 having a U-shaped cross section is welded to the column portion 12a with its open surface facing inward. At that time, the support column 12 a is accommodated in the side frame 71 and welded to the rear side wall of the side frame 71. A lower end portion of the side frame 71 extends below the support column portion 12 a, and the lower end portion of the side frame 71 supports the reclining mechanism 4 in cooperation with the reclining bracket 24.

  A reinforcing member 72 is welded to the support column 12a and the side frame 71. At this time, the rear side wall of the reinforcing member 72 is welded to the front surface of the support column 12 a, and the front side wall is overlapped with the front surface of the side frame 71 and welded.

  Thus, the seat back frame 12 is supported by the intermediate strength member 13 via the side frame 71 and the reclining mechanism 4, and in the front-rear direction including the side frame 71 and the reinforcing member 72 around the support column 12 a. A reinforcing structure 73 having a rectangular section with a long side and a large section modulus is formed, and thereby the bending rigidity in the front-rear direction of the column portion 12a is reinforced, so that the seat back frame 12, particularly the inner column portion 12a, In addition, it can withstand a large longitudinal load applied during a rear-end collision of the following vehicle.

  2, 14, and 16, the driven release lever 74 of the reclining mechanism 4 is pivotally supported on the inner side surface of the lower end portion of the side frame 71, and the driven release lever 74 is swung upward. The locked state of the reclining mechanism 4 is released. The driven release lever 74 is connected to a drive release lever 75 that is pivotally supported on the front side of a lever support plate 76 provided on the upper portion of the seat back frame 12 via an inner cable 78 a of a Bowden cable 78.

  A support plate 79 extends from the lower end portion of the reinforcing member 72 toward the driven release lever 74, and an outer support portion that supports the lower end portion of the outer cable 78 b of the Bowden cable 78 at the lower end of the support plate 79. 79a is formed. In addition, a guide groove 80 that guides an intermediate portion of the outer cable 78b is formed on the side wall of the lower end portion of the reinforcing member 72. As described above, the reinforcing member 72 not only reinforces the support column 12a but can also serve as a support and guide for the Bowden cable 78.

  As shown in FIGS. 2 and 16, the upper portion and the side portion of the lever support plate 76 are welded to the beam portion 12c of the seat back frame 12 and the left and right outer column portions 12b, respectively. A plurality of wires 81 are welded to the left and right support columns 12a and 12b of the seat back frame 12 to support the cushion member 38 of the seat back 5 and the lever 81 is supported by the uppermost wire 81. The back surface of the plate 76 is welded. At that time, the uppermost wire 81 is formed with a crank portion 81 a that is inclined to contact with the back surface of the lever support plate 76, and the crank portion 81 a is welded to the back surface of the lever support plate 76.

  In this way, even if there is a variation in the gap between the back surface of the lever support plate 76 welded to the seat back frame 12 and the general outer peripheral surface of the uppermost wire 81, the uppermost wire 81 is connected to the left and right support columns 12a. When the two ends of the wire 81 are in contact with the left and right support columns 12a, the crank portion 81a is appropriately rotated together with the uppermost wire 81 to contact the back surface of the lever support plate 76. In the abutting state, both ends of the wire 81 are welded to the left and right support columns 12a, and the crank portion 81a is welded to the back surface of the lever support plate 76, so that the lever support plate 76 regardless of the variation in the gap. And the uppermost wire 81 can be welded. In this way, the lever support plate 76 is welded to the seat back frame 12 and the uppermost wire 81 at three points, and the support rigidity can be increased.

  In addition to the upper end of the inner cable 78 a of the Bowden cable 78, the drive release lever 75 that is pivotally supported by the lever support plate 76 includes a return spring 82 and a release operation member 83 that protrudes from the upper end surface of the seat back 5. Connected.

  Thus, when the release operation member 83 is pulled against the urging force of the return spring 82, the driven release lever 74 is swung upward through the drive release lever 75 and the inner cable 78a, and the reclining mechanism 4 is moved. The locked state is released, and the seat back 5 can be tilted. If the release operation member 83 is released, the reclining mechanism 4 is locked and the seat back 5 can be fixed at a desired angle.

  Next, another embodiment of the present invention shown in FIG. 18 will be described.

  In this other embodiment, the reinforcing member 72 ′ that connects the column portion 12 a and the side frame 71 is formed in an L-shaped cross section. At that time, the front side wall of the reinforcing member 72 'is overlapped with the front surface of the side frame 71 and welded in the same manner as in the previous embodiment, but the rear end portion is welded to the side surface of the support column 12a.

  According to this other embodiment, the reinforcing structure 73 having a large section modulus is formed, whereby the bending rigidity in the front-rear direction of the column portion 12a is strengthened, and the use of the reinforcing member 72 'having the L-shaped cross section is used. Weight reduction can be achieved.

The present invention is not limited to the above-described embodiment, and various design changes can be made without departing from the gist thereof. For example, the present invention can be applied to a front seat for one person. Moreover, the skin 39 and the extended skin 40 can also be comprised with the same raw material. The mounting structure of the rail cover 58 can also be applied when the rear ends of the fixed and movable rails 27 and 25 are covered by the rail cover.

2 ... Seat cushion frame 3 ... Seat cushion 5 ... Seat back 7 ... Rear frame 8 ... Front frame 9 ... ··· Side frame 9a ··· Reinforcement rod 10 ··· Pivot bracket 11, 67 ··· Bolt 12 ··· Seat back frame 58 ··· Cover member (rail cover)
59 ... Notch 60 ... Locking hole 62 ... Projection 63 ... Locking claw

Claims (6)

A rear frame (7), a front frame (8) disposed in front of the rear frame (7), and a pair of left and right side frames (26) connecting the both ends of the rear and front frames (7, 8) ( 9) and a seat cushion frame (2) that supports the seat cushion (3) and a seat back frame (12) that is connected to the rear portion of the seat cushion frame (2) and supports the seat back (5). In the vehicle seat frame structure,
The side frame (9) is formed in a cross-sectional channel shape, and a pivot bracket (10) that is also formed in a cross-sectional channel shape and is fixed to the rear frame (7) is connected to the rear end of the side frame (9). A vehicle seat frame structure, wherein the vehicle seat is fixed by being fitted to a portion. The vehicle seat frame structure according to claim 1,
The frame structure of a vehicle seat, wherein the side frame (9) and the pivot bracket (10) are fastened to each other with bolts (11). In the frame structure of the vehicle seat according to claim 1 or 2,
A frame structure for a vehicle seat, wherein reinforcing ribs (9a) are bent at the upper left and right edges of the side frame (9). The vehicle seat frame structure according to claim 3,
A vehicle seat frame, wherein a cover member (58) disposed on the front side of the side frame (9) is fixed to the reinforcing rod (9a) with a bolt (67) or a clip. Construction. The vehicle seat frame structure according to claim 4,
A notch (59) opening forward is provided at the front end of the side frame (9), and a protrusion (62) provided on the cover member (58) is engaged with the notch (59). A frame structure for a vehicle seat, characterized by In the frame structure of the vehicle seat according to claim 4 or 5,
The side frame (9) is provided with a locking hole (60), and the locking claw (63) provided on the cover member (58) is engaged with the locking hole (60). A frame structure of a vehicle seat, which is a feature.

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