JP6610432B2 - Vehicle seat - Google Patents

Description

  The present invention relates to a vehicle seat.

  In a vehicle seat having a back frame made of a non-ferrous material such as a composite resin material or a back frame made of a thin steel plate material, an upper arm that is a high-strength plate member when the back frame is coupled to a reclining mechanism Some are attached via. In the technique described in Patent Document 1, a lower end portion of a side frame of a back frame made of a composite resin material is attached to an upper end portion of a substantially rectangular plate-like upper arm with a fastening member such as a bolt, and the lower end portion of the upper arm is It is connected to the reclining mechanism by welding or the like.

JP 2015-44541 A

  In the technique described in Patent Document 1, the upper arm is formed by a relatively thick steel plate to ensure strength and rigidity, and there is a problem that it is difficult to reduce the weight.

  In view of such a problem, an object of the present invention is to provide a vehicle seat having a back frame that can be reduced in weight by attaching the back frame to a reclining mechanism with a simple structure.

A first aspect of the present invention is a vehicle seat, and is disposed between a seating-side cushion frame, a backrest-side back frame, a rear side of the cushion frame, and a lower side of the back frame. A pair of recliners that support the back frame so as to be relatively rotatable with respect to the cushion frame, and a pair of recliners that are provided through respective operation centers of rotation, and interlocking the locking or unlocking of the pair of recliners. And a pair of first pressing plates that press and fix the back frame against the pair of recliners, and a protrusion is provided on a surface of the pair of recliners facing the back frame. The back frame is provided with a fitting through hole into which the protrusion is fitted,
The pair of first pressing plates are slidable on a surface of the back frame opposite to the recliner in a state where the protrusions of the pair of recliners are fitted in the fitting through holes of the back frame. The back frame is fixed to the shaft while being pressed against the recliner.

  According to the first aspect of the present invention, the shaft in the state where the lower side of the back frame is brought into contact with the pair of recliners and the surfaces opposite to the pair of recliners are pressed against the pair of recliners by the pair of first pressing plates. It is fixed to. Since the first pressing plate only needs to perform the function of pressing the lower side of the back frame against the recliner, the first pressing plate can be formed smaller and thinner than the upper arm that functions to transmit a strong torque load from the back frame to the recliner. This eliminates the need for an upper arm formed of a relatively thick steel plate and reduces the weight of the vehicle seat since the weight increased by the addition of the first pressing plate is small.

  According to a second aspect of the present invention, in the first aspect, the pair of recliners are respectively attached to the seat inside of the pair of plate-like lower arms of the cushion frame, and the pair of lower arms rotate the shaft. The second pressing plate is slidably brought into contact with the surfaces of the pair of lower arms opposite to the pair of recliners, and is fixed to the shaft. .

  According to the second invention, the back frame can be sandwiched and supported by the pair of recliners by the first pressing plate and the second pressing plate, respectively, so that the back frame and the cushion frame can be connected more firmly.

  According to a third aspect of the present invention, in the first aspect or the second aspect, the second pressing plate is a part of a lever that rotates the shaft relative to the cushion frame.

  According to the third invention, the lever for rotating the shaft can also function as the second pressing plate. Thereby, the effect of the second invention can be achieved without increasing the number of parts.

  A fourth aspect of the present invention is a vehicle seat, and is disposed between a seating-side cushion frame, a backrest-side back frame, a rear side of the cushion frame, and a lower side of the back frame. A recliner that supports the back frame so as to be relatively rotatable with respect to the cushion frame; and a clamping plate that clamps and fixes the back frame with respect to the recliner, the recliner being opposed to the back frame. A protrusion is provided on the surface, a loose-fitting through-hole in which the protrusion is loosely fitted is provided in the back frame, and the protrusion is fitted inward to the clamping plate so that the play of the back frame is reduced. A burring portion is provided in which the fitting through-hole is fitted to the outside, and the clamping plate is disposed outside the burring portion of the clamping plate in the loose fitting through-hole of the back frame. With engaged, characterized in that it is fixed relative to the recliner Mate was the back frame to the inside of the burring portion a protrusion in a state of sandwiching the recliner of the recliner.

  According to the fourth invention, the back frame is fixed to the recliner by fixing the holding plate to the recliner in a state where the lower side of the back frame is held between the recliner and the holding plate. The clamping plate only needs to fulfill the function of sandwiching and fixing the lower side of the back frame to the recliner, so it can be formed smaller and thinner than the upper arm that functions to transmit a strong torque load from the back frame to the recliner. . This eliminates the need for an upper arm formed of a relatively thick steel plate and reduces the weight of the vehicle seat since the weight increased by the addition of the clamping plate is small.

  According to a fifth aspect of the present invention, in any one of the first to fourth aspects, the back frame is made of a composite resin material or a light alloy.

  According to the fifth invention, the weight reduction effect by the back frame body is combined with the weight reduction.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the back frame is fixed to the recliner by bonding with an adhesive.

  According to the sixth aspect, the back frame can be more firmly fixed to the recliner.

1 is a side view of an automobile seat according to an embodiment of the present invention. It is a figure which expands and shows the II part of FIG. 1 seeing from the sheet | seat inner side. FIG. 3 is a cross-sectional view taken along the line III-III in FIG. 2. It is the perspective view which looked at the back frame of the seat for cars concerning the above-mentioned embodiment from back. It is a figure which shows other embodiment of this invention corresponding to FIG. FIG. 6 is a sectional view taken along line VI-VI in FIG. 5. It is a figure which shows the case where the back frame made from a thin steel plate is employ | adopted corresponding to FIG.

  1 to 4 show an embodiment of the present invention. The present embodiment is an example in which the present invention is applied to an automobile seat. In each figure, each direction of the vehicle seat 1 and the vehicle when the vehicle seat 1 is attached to the floor F of the vehicle is indicated by an arrow. In the following description, the description regarding the direction is made based on this direction.

  As shown in FIG. 1, the vehicle seat 1 of the present embodiment is a front seat for a passenger car, and includes a seat cushion 20 serving as a seating portion, a seat back 30 serving as a backrest, and a seat cushion 20 on the floor F. A slide rail 40 is provided so as to be slidable in the front-rear direction. Here, the automobile seat 1 corresponds to the “vehicle seat” in the claims.

  The seat cushion 20 is configured such that a cushion pad 22 that is a cushion material is placed on a cushion frame 21 that forms a skeleton, and is covered with a cushion cover 23 that is a skin material. Supportive. In the cushion frame 21, front end portions of side frames 21a made of a steel plate material extending in a pair of left and right in the front-rear direction are connected to each other so as to be relatively rotatable by a front pipe (not shown), and the rear end portions are connected to each other. The rear pipe 21c is connected in a bridging manner so as to be relatively rotatable. Thus, the cushion frame 21 is formed in a rectangular frame shape along the outer peripheral shape of the seat cushion 20 in a top view. As shown in FIG. 3, each side frame 21a has a standing wall portion 21a2 extending from the upper and lower ends of the plate-like main body portion 21a1 extending in the front-rear direction perpendicular to the floor F to the left (inner side of the seat) for reinforcement. It is a member. In the side frames 21a, lower arms 21b are attached to the upper portions of the rear end portions of the main body 21a1 by fastening members such as bolts. The lower arm 21b is a member made of a thick steel plate material compared to the side frame 21a, and is provided with a hole capable of being welded and fixed by abutting the outer surface of the recliner 50, which will be described later.

The seat back 30 is a back pan 31 which is a shell-type back frame forming a skeleton.
A back pad 32, which is a cushion material, is placed on the top and covered with a back cover 33, which is a skin material, to support the back of the seated person. The back pan 31 is a panel-like member made of a so-called fiber reinforced composite resin, and is formed, for example, by laminating a plurality of carbon fiber fabrics and compounding an epoxy resin as a matrix resin. When the upper and lower molds are closed, a predetermined number of carbon fiber fabrics are placed in a mold cavity that forms a cavity having the same shape as the back pan 31 between the upper and lower molds. A pre-epoxy resin is injected, cured by reaction, and demolded. Here, the back pan 31 corresponds to a “back frame” in the claims.

  As shown in FIG. 4, the back pan 31 has a concave shape so as to conform to the upper body outline of the seated person. Side standing wall portion 31a for supporting the occupant's waist from both sides, side widened portion 31b having a shape slightly opened on both sides at the front end portion thereof, and a shoulder portion extending outward on both sides to support the shoulder portion of the occupant A support portion 31c and a head support portion 31d extending upward to support the head of the seated person are formed. In addition, two through holes 31e are formed at positions corresponding to the upper portions of both shoulders of the seated person. The through-hole 31e is for imparting designability that creates a sport-type seat. The terminal portion of the back pan 31 is formed with a folded portion 31f around the entire circumference except for the lower portion. This is for inserting and fixing the back cover 33 terminal into a narrowed portion formed between the folded portion 31f and the main body. On the lower end side of the side standing wall 31a, there are provided six dowel holes 31a1 into which six dowels 52a formed on the surface of the recliner 50 described later are fitted, and through holes 31a2 corresponding to the through holes of the recliner 50. It has been. Here, the dowel hole 31a1 corresponds to a “fitting through hole” in the claims.

  The slide rail 40 is assembled so that the upper rail 42 can slide in the front-rear direction with respect to the lower rail 41 that extends in the front-rear direction and is fixed to the floor F. A bracket 42 a extending in the front-rear direction is attached to the upper surface of the upper rail 42.

  The cushion frame 21 is attached to the bracket 42a via a pair of front links 24 on the front side and a pair of rear links 25 on the rear side. Specifically, the upper end portion of the front link 24 is rotatably attached to the front side of the side frame 21a in both the left and right sides, and the upper end portions of the front link 24 are connected by a front pipe. Moreover, the upper end part of the rear link 25 is rotatably attached to the rear side of the side frame 21a in both the left and right sides, and the upper end part of the rear link 25 is connected by a rear pipe 21c. And the lower end part of the front link 24 is rotatably attached to the front part side of the bracket 42a, and the lower end part of the rear link 25 is rotatably attached to the rear part side of the bracket 42a. That is, the left and right side frames 21a, the front link 24, the rear link 25, and the bracket 42a form a four-bar link, and the upper link between the front link 24 and the upper link between the rear link 25 are connected by a pipe. It has become. One of the rear links 25 is provided with a sector gear 25a. The sector gear 25a is engaged with a pinion gear (not shown) rotatably supported by the side frame 21a, and the pinion gear is rotated by a lifter lever (not shown). It is configured to be movable. Accordingly, when the lifter lever is operated to rotate the pinion gear, one of the rear links 25 is rotated with respect to the side frame 21a, and this movement is transmitted to the other rear links 25 and the front links 24 to slide. The cushion frame 21 moves up and down with the rail 40 kept substantially parallel.

  The recliner 50 is provided with a lock mechanism (not shown) that locks the relative rotation between two disk-like connecting members (not shown) assembled in the axial direction so as to be rotatable relative to each other. This is an apparatus in which the outer periphery is caulked with an outer ring 51 and held. Since the basic configuration of the recliner 50 is a known configuration disclosed in documents such as Japanese Patent Application Laid-Open No. 2002-360368, detailed description thereof is omitted. Since the left and right recliners 50 are mirror images, the right recliner 50 will be described as a representative. As shown in FIGS. 2 and 3, six dowels 52 a projecting in a substantially cylindrical shape are formed side by side at equal intervals in the circumferential direction on the connecting member constituting the left side surface (the inner surface of the seat) of the recliner 50. Has been. The height of the dowel 52 a is set substantially equal to the thickness of the side standing wall 31 a of the back pan 31. Further, four dowels 53a projecting in a substantially cylindrical shape are formed in the connecting member constituting the right side surface (the surface outside the seat) of the recliner 50 so as to be arranged at equal intervals in the circumferential direction. At the center of the recliner 50, a through hole 54 is provided centering on the rotation axis of the two disk-like connecting members. When a shaft 60 to be described later is passed through the through hole 54, the lock mechanism engages with the shaft 60, and the relative rotation of the two connecting members can be locked or unlocked according to the rotation of the shaft 60. ing. Here, the dowel 52a corresponds to a “projection” in the claims.

  A procedure for attaching the back pan 31 to the lower arm 21b via the recliner 50 will be described with reference to FIG. The upper part of the lower arm 21b is fixed to the right side surface (the surface outside the seat) of the recliner 50 by welding, and the lower part of the lower arm 21b is attached to the upper part on the rear end side of the side frame 21a with a fastening member such as a bolt. Next, after applying an adhesive to the left side of the recliner 50 (the surface inside the sheet), the six dowels 52a are fitted into the six dowel holes 31a1 of the back pan 31 and held for a predetermined time to cure the adhesive. Let it fix. A disc-shaped pressing plate 61 having an outer diameter approximately the same as the outer diameter of the recliner 50 and having a through hole 61a having an inner diameter slightly larger than the outer diameter of the shaft 60 is passed through the left side surface of the recliner 50. The holes 54 and the through holes 61a are brought into contact with each other so as to be coaxial. In this state, the shaft 60 is arranged so as to span between the through holes 54 of the left and right recliners 50, and the periphery of the through hole 61 a of the pressing plate 61 is welded and fixed to the outer periphery of the shaft 60. Thus, the pressing plate 61 can slide and rotate with respect to the back pan 31 in a state where the side standing wall portion 31 a of the back pan 31 is pressed against the recliner 50. Here, when the shaft 60 is a cylindrical metal pipe member and extends between the left and right recliners 50, the shaft 60 protrudes from the outer surface of the left and right recliners 50 by a length corresponding to the width of the recliner 50 in the left-right direction. A reclining lever 62 is slidably brought into contact with the right surface of the right recliner 50, and is fixed to the outer periphery of the shaft 60 by welding. A coil spring 63 that urges the shaft 60 in the locking direction of the locking mechanism is disposed between the shaft 60 and the right connecting member of the recliner 50. When the reclining lever 62 is operated against the urging force of the coil spring 63, the lock mechanism of the recliner 50 is unlocked and the back pan 31 can be rotated with respect to the lower arm 21b. A return spring 64 that is a spiral spring is disposed so as to cover the coil spring 63 from above and below. The return spring 64 is hooked on a bracket 65 attached to the lower arm 21 b at an inner end thereof, and is attached to a bracket 66 attached to the back pan 31 on an outer end thereof. As a result, the back pan 31 is constantly applied with an urging force in the forward tilt direction with respect to the lower arm 21b. Here, the pressing plate 61 and the reclining lever 62 correspond to a “first pressing plate” and a “second pressing plate” in the claims, respectively.

  The back pad 32 is made of urethane foam, and has a shape along the shape of the side surface of the seated person of the back pan 31. The thickness of the general part is about 40 to 60 mm, and the terminal part is gradually thinned. The terminal of the back cover 33 is folded back on the side opposite to the seated person along the folded part 31f of the back pan 31 terminal, and the terminal part is inserted into the narrowed part and fixed. In order for the back cover 33 to follow the concave shape of the back pad 32, a well-known pull-in system that locks a suspension wire attached at a predetermined position of the back cover 33 to an insert wire inserted at a predetermined position of the back pad 32. Or it is fixed by the partial adhesion method.

  The present embodiment configured as described above has the following operational effects. In the back pan 31, the six dowels 52 a of the left and right recliners 50 are fitted to the six dowel holes 31 a 1 provided in the left and right side standing wall portions 31 a with respect to the recliner 50, and the surface opposite to the recliner 50. Is pressed and fixed by a pressing plate 61. Here, the pressing plate 61 only needs to perform the function of pressing the lower side of the side standing wall portion 31a against the recliner 50, so that a strong torque load applied from the back pan 31 at the time of a collision or the like is transmitted to the recliner 50. Compared with the upper arm that fulfills its function, it can be made smaller and thinner. This eliminates the need for the upper arm formed of a relatively thick steel plate and reduces the weight of the automobile seat 1 because the weight increased by the addition of the pressing plate 61 is small.

  Further, since the back pan 31 is fixed to the recliner 50 by bonding with an adhesive, the fixing strength becomes higher. Furthermore, since the back pan 31 is sandwiched and supported by the recliner 50 and the lower arm 21b by the pressing plate 61 and the reclining lever 62, the back pan 31 can be more firmly connected to the recliner 50 and the lower arm 21b. .

  5 and 6 show another embodiment of the present invention. Regarding the same configuration as that of the above-described embodiment, the same reference numerals are given to the drawings, and the description is omitted. The difference from the above embodiment is mainly that the shape and fixing method of the pressing plate 61 that is fixed in a state where the back pan 31 is pressed against the recliner 50 are different. The clamping plate 67 is a disk-shaped member having an outer diameter that is substantially the same as the outer diameter of the recliner 50 and having a through hole 61 a having an inner diameter slightly larger than the outer diameter of the shaft 60 at the center. The sandwiching plate 67 is provided with six burring portions 67a into which six dowels 52a projecting in a substantially cylindrical shape are fitted inside the connecting member that forms the left side surface (the seat inner surface) of the recliner 50. Yes. The height of the cylindrical portion of the burring portion 67a is set slightly smaller than the thickness of the side standing wall portion 31a of the back pan 31. Six dowel holes 31a3 into which six dowels 52a formed on the surface of the recliner 50 are loosely fitted and a through hole 31a2 corresponding to the through hole of the recliner 50 are provided on the lower end side of the side standing wall portion 31a of the back pan 31. Is provided. The radius of the dowel hole 31a3 is larger than the radius of the dowel hole 31a1 in the above-described embodiment by about the thickness of the clamping plate 67, and is set to a size that can be fitted to the outside of the cylindrical portion of the burring portion 67a. Here, the dowel hole 31a3 and the clamping plate 67 correspond to the “free fitting through hole” and the “clamping plate” in the claims, respectively.

  Based on FIG. 6, a different part from the said embodiment about the procedure which attaches the back pan 31 to the lower arm 21b via the recliner 50 is demonstrated. After the adhesive is applied to the left side surface (the inner surface of the seat) of the recliner 50, the six dowels 52a are loosely fitted into the six dowel holes 31a3 of the back pan 31, and the six burring portions 67a of the holding plate 67 are Six dowels 52a are fitted inside the cylindrical portion, and the clamping plate 67 is attached. At this time, the outer cylindrical portion of the six burring portions 67 a of the clamping plate 67 is fitted into the six dowel holes 31 a 3 of the back pan 31. In this state, some of the six burring portions 67a of the clamping plate 67 and the dowels 52a of the recliner 50 fitted thereto are fixed by welding. In this state, the adhesive is cured when a predetermined time elapses, but the clamping plate 67 can be attached to the recliner 50 after the adhesive is cured first. However, in the latter case, it is necessary to accurately position the back pan 31 with respect to the recliner 50 and hold the state until the adhesive is cured. Next, the shaft 60 is disposed so as to span between the through holes 54 of the left and right recliners 50, and the reclining lever 62 is disposed so as to slidably contact the right surface of the right recliner 50. It is fixed by welding.

  The present embodiment configured as described above has the following operational effects. In the back pan 31, the six dowels 52 a of the left and right recliners 50 are loosely fitted into the six dowel holes 31 a 3 provided in the left and right side standing wall portions 31 a with respect to the recliner 50, and the surface opposite to the recliner 50. Are clamped by a clamping plate 67 and fixed. Here, the clamping plate 67 only needs to fulfill the function of clamping the lower side of the side standing wall portion 31a to the recliner 50. Therefore, a strong torque load applied from the back pan 31 at the time of a collision or the like is applied to the recliner 50. Compared to the upper arm that fulfills the function of transmitting, it can be made smaller and thinner. This eliminates the need for the upper arm formed of a relatively thick steel plate and reduces the weight of the automobile seat 1 because the weight increased by the addition of the clamping plate 67 is small. Further, since the back pan 31 is fixed to the recliner 50 by bonding with an adhesive, the fixing strength becomes higher.

  As mentioned above, although specific embodiment was described, this invention is not limited to those external appearances and structures, A various change, addition, and deletion are possible in the range which does not change the summary of this invention. For example, the following can be mentioned.

  1. In the above embodiment, a carbon fiber fabric is used as a reinforcing material as a material for the back pan 31 and an epoxy resin is used as a matrix resin. However, the present invention is not limited to this, and a glass fiber fabric is used as a reinforcing material. Alternatively, a thermosetting resin such as an unsaturated polyester resin may be used. Further, cold stamping may be performed by heating a stampable sheet in which a reinforcing material such as carbon fiber or glass fiber is combined with a thermoplastic resin such as polypropylene or polyamide.

  2. In the above embodiment, the back pan 31 made of the composite resin material is employed as the back frame. However, the present invention is not limited thereto, and a back frame made of a light alloy or a back frame made of a thin steel plate may be employed. Here, when a thin steel plate back frame is employed, the thickness of the back frame 31A corresponding to the back pan 31 is about half the thickness of the back pan 31, as shown in FIG. Therefore, in order to enable the pressing plate 61 to slide with respect to the back frame 31A in a state where the back frame 31A is pressed against the recliner 50, an annular convex portion 61b for avoiding contact with the dowel 52a is provided. ing. Accordingly, the pressing plate 61 is slidable with respect to the back frame 31 </ b> A in a state where the back frame 31 </ b> A is pressed against the recliner 50, as in the above-described embodiment.

  3. In the above embodiment, the present invention is applied to an automobile seat, but may be applied to a seat mounted on a vehicle such as an airplane, a ship, or a train.

1 Car seat (vehicle seat)
20 Seat cushion 21 Cushion frame 21b Lower arm 30 Seat back 31a1 Dowel hole (fitting through hole)
31a3 Dowel hole (free fitting through hole)
31 Back pan (back frame)
31a Side standing wall 50 Recliner 52a Dowel (protrusion)
60 Shaft 61 Pressing plate (first pressing plate)
62 Reclining lever (second pressing plate)
67 Clamping plate (Clamping plate)
67a Burring part F Floor

Claims (6)

A vehicle seat,
A cushion frame on the seating side, a back frame on the backrest side, and disposed between the rear side of the cushion frame and the lower side of the back frame so that the back frame can be rotated relative to the cushion frame. A pair of recliners to be supported, a shaft provided through the respective operation center of rotation of the pair of recliners to interlock or unlock the pair of recliners, and the back frame to the pair of recliners A pair of first pressing plates to be pressed and fixed,
A protrusion is provided on a surface of the pair of recliners facing the back frame, and a fitting through hole into which the protrusion is fitted is provided in the back frame,
The pair of first pressing plates are slidable on a surface of the back frame opposite to the recliner in a state where the protrusions of the pair of recliners are fitted in the fitting through holes of the back frame. A vehicle seat fixed to the shaft in a state where the back frame is pressed against the recliner.   2. The pair of recliners according to claim 1, wherein each of the pair of recliners is attached to an inner side of a pair of plate-like lower arms of the cushion frame, and the pair of lower arms rotatably supports the shaft, and A vehicle seat, wherein a second pressing plate is slidably brought into contact with a surface of the lower arm opposite to the pair of recliners and is fixed to the shaft. The vehicle seat according to claim 2 , wherein the second pressing plate is a part of a lever that rotates the shaft with respect to the cushion frame. A vehicle seat,
A cushion frame on the seating side, a back frame on the backrest side, and disposed between the rear side of the cushion frame and the lower side of the back frame so that the back frame can be rotated relative to the cushion frame. A recliner for supporting, and a clamping plate for clamping and fixing the back frame to the recliner,
A protrusion is provided on a surface of the recliner facing the back frame, and a loose fitting through hole into which the protrusion is loosely fitted is provided in the back frame.
The holding plate is provided with a burring portion in which the protruding portion is fitted inside and the loose fitting through hole of the back frame is fitted outside, and the holding plate is provided in the loose fitting through hole of the back frame. The outer side of the burring portion of the clamping plate is fitted, and the projection of the recliner is fitted to the inner side of the burring portion, and the back frame is clamped to the recliner and fixed to the recliner. Vehicle seat.   The vehicle seat according to any one of claims 1 to 4, wherein the back frame is made of a composite resin material or a light alloy. The vehicle seat according to any one of claims 1 to 5, wherein the back frame is fixed to the recliner by bonding with an adhesive.

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