JP2013252726A - Vehicle seat frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcing structure capable of effectively preventing bending deformation of a cross-sectional shape, in a vehicle seat frame.SOLUTION: A seat back frame 10 (vehicle seat frame) that is configured to have a cross-sectional shape including a side surface part 11A and a front surface part 11B or a rear surface part 11C that are bent relative to each other has blocks 20, each having a solid cross-section, that are respectively provided integrally joined to the side surface part 11A and the front surface part 11B or the rear surface part 11C. The seat back frame 10 is configured to allow each of the blocks 20 to prevent bending movement of being bent to a side in an angular direction, in which each of the blocks 20 is provided, between the side surface part 11A and the front surface part 11B and between the side surface part 11A and the rear surface part 11C.

Description

  The present invention relates to a vehicle seat frame. Specifically, the present invention relates to a vehicle seat frame including a first surface portion and a second surface portion that are bent with respect to each other.

  Conventionally, in a vehicle seat, a side frame of a seat back is formed by being bent into a shape having a side surface portion facing the outside of the seat and a rear surface portion facing the rear side of the seat by a pressed material of a thin steel plate. Is known (Patent Document 1). Since the side frame is made of a thin steel plate material, in order to increase its structural strength, an L-shaped plate serving as a reinforcing plate is assigned to the inner corner portion between the side surface portion and the rear surface portion and coupled. It is configured.

JP-A-11-32865

  However, in the above prior art, since the L-shaped plate is also a weak structure made of a pressed material of a thin steel plate, a large load is input to the seat back, and the side frame has a corner portion between the side surface portion and the rear surface portion. Is further bent, the L-shaped plate is also pushed and easily bent and deformed together, and a sufficient reinforcing function is not obtained. The present invention was devised as a solution to the above problems, and the problem to be solved by the present invention is to provide a vehicle seat frame with a reinforcing structure capable of effectively preventing bending deformation of a cross-sectional shape. There is to provide.

In order to solve the above problems, the vehicle seat frame of the present invention takes the following means.
A first invention is a vehicle seat frame having a cross-sectional shape including a first surface portion and a second surface portion that are bent with respect to each other, and is integrally coupled to at least the first surface portion, with respect to the second surface portion. And a block body having a solid cross section provided in a state of being in contact with each other or facing a close position. In the vehicle seat frame, the block body is configured to prevent the movement of one surface portion being bent with respect to the other surface portion toward the angle direction side where the block body is provided.

  According to the first aspect of the present invention, the solid cross-section block body is provided in the above-described manner between the first surface portion and the second surface portion that are bent with respect to each other, so that one surface portion is in relation to the other surface portion. Movement that is bent toward the side of the angle in which the block body is provided is prevented. Since the block body has a solid cross section, the deformation can be received with a strong force. Therefore, the block body can be compactly provided at the corner between the first surface portion and the second surface portion, and the bending deformation of the cross-sectional shape of the vehicle seat frame can be effectively prevented by the block body. .

  According to a second invention, in the first invention described above, the block body is provided in a state of being integrally coupled to the first surface portion and the second surface portion, respectively.

  According to the second invention, the blocking force of the deformation movement by the block body is further increased, and the bending deformation of the vehicle seat frame can be further effectively prevented.

  According to a third invention, in the first or second invention described above, the block body is provided in a state of being in surface contact with a corner portion between the first surface portion and the second surface portion without a gap, In addition, the solid cross section is equal to or more than a straight line connecting a part point on the outer peripheral side of the part surface that abuts against the first surface part and a part point on the outer peripheral side of the part surface that abuts on the second surface part. It has a cross-sectional shape that swells.

  According to the third aspect of the invention, since the block body has the cross-sectional shape described above, the block body is less likely to buckle and deform, so that the blocking force of the deformation movement by the block body is further increased, and the vehicle seat frame Can be more effectively prevented from bending deformation.

1 is a perspective view illustrating a schematic configuration of a vehicle seat frame according to Embodiment 1. FIG. It is the disassembled perspective view which removed and showed the block body from the vehicle seat frame. It is the III-III sectional view taken on the line of FIG. FIG. 6 is a cross-sectional view illustrating a main configuration of a vehicle seat frame according to a second embodiment. FIG. 6 is a cross-sectional view illustrating a main configuration of a vehicle seat frame according to a third embodiment. It is sectional drawing which showed the principal part structure of the vehicle seat frame of another Example. It is sectional drawing which showed the principal part structure of the vehicle seat frame of another Example.

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

  First, the configuration of the “vehicle seat frame” according to the first embodiment will be described with reference to FIGS. As shown in FIG. 1, the “vehicle seat frame” of the present embodiment is configured as a seat back frame 10 that forms a skeleton of a seat back 2 of a vehicle seat 1 configured as a passenger seat of an automobile. Here, the vehicle seat 1 includes a seat back 2 that serves as a backrest for a seated occupant, a seat cushion 3 that serves as a seating portion, and a headrest 4 that serves as a headresting portion.

  The seat back 2 has a disc-shaped reclining device 5 that functions as a rotating shaft device whose lower end portions on both the left and right sides can be prevented from rotating with respect to the rear end portions of the left and right sides of the seat cushion 3, respectively. Connected to each other. Thus, the seat back 2 is connected to the seat cushion 3 so that the backrest angle can be adjusted. Specifically, each reclining device 5 includes lower end portions of both left and right side frames 11 of the seat back frame 10 constituting the skeleton of the seat back 2 and both left and right side frames 31 of the seat cushion frame 30 constituting the skeleton of the seat cushion 3. And the rear end of the two are connected to each other so as to be relatively rotated about the same axis.

  Each of the reclining devices 5 described above is normally held in a locked state in which the backrest angle of the seat back 2 is fixed, and is lifted by a release lever 6 provided on the side of the seat cushion 3 outside the vehicle. The lock state of is released. Specifically, each reclining device 5 is connected so that operation shafts (not shown) inserted through the center portions thereof can be rotated integrally with each other by a connecting rod 6A. 6 is pulled up and the operating shaft on the outside of the vehicle is turned in the releasing operation direction, so that the operating shaft on the inside of the vehicle is also turned together in the releasing operation direction, and the locked state of both reclining devices 5 is released simultaneously. It has come to be.

  By the release operation, each reclining device 5 is switched to a state in which the backrest angle of the seat back 2 can be freely changed in the front-rear direction. Then, after the backrest angle of the seat back 2 is adjusted to a desired angle position, the operation of the release lever 6 is stopped, whereby each reclining device 5 is returned to the locked state again, and the backrest angle of the seat back 2 is increased. Is returned to the fixed state at the adjusted angular position. Since the basic structure of each reclining device 5 has the same known configuration as that disclosed in the literature such as Japanese Patent Application Laid-Open No. 2011-116303, a specific description will be omitted.

  Here, spiral springs 7 that apply a biasing force in the direction of rotating the seat back 2 to the front side of the seat at all times are hooked on the left and right sides between the seat back 2 and the seat cushion 3. Yes. The seat back 2 is lifted up to a position where the seat back 2 hits the back of the seated occupant by releasing the fixed state of the backrest angle by the urging force of the spiral spring 7, and the back of the seated occupant is tilted back and forth. Accordingly, the position of the backrest angle is changed so that the operation of adjusting the backrest angle of the seat back 2 can be easily performed.

  The seat cushion 3 is provided on the floor of the vehicle via a pair of left and right slide devices (not shown), and is provided in a state in which the front-rear position relative to the floor can be adjusted. Since the basic structure of these slide devices is the same as that disclosed in the literature such as Japanese Patent Application Laid-Open No. 2010-221935, detailed description thereof will be omitted. The headrest 4 is formed by the shape of the upper region of the seat back 2.

  By the way, the seat back frame 10 which constitutes the skeleton of the seat back 2 described above is configured by a pressed steel plate material in which a thin steel plate and a steel pipe material are optimally combined in order to reduce the weight. The seat back frame 10 configured as described above is configured so that, even when a load due to normal use such that the back of the seated occupant leans against the seat back 2 receives a load due to its structural strength, the input load is a stable force. It is supposed to be accepted.

  However, the seat back frame 10 itself has a large size such that a rear collision of the vehicle occurs and the back of the seated occupant is pressed against the seat back 2 with a strong force exceeding the load during normal use described above. When a load is input, stress concentrates on a fragile part consisting of a part of the bent cross-sectional shape, and the fragile part promotes deformation in such a way that the bent shape of the fold is further advanced. Therefore, the structure strength is weak. Therefore, in this embodiment, even if a large load as described above is applied to the seat back frame 10, a plurality of block bodies 20 are provided as reinforcing materials so that the load is widely dispersed and received strongly. It has been. Here, each block body 20 corresponds to a “block body” of the present invention.

  Hereinafter, detailed configurations of the seat back frame 10 and the block body 20 will be described. As shown in FIGS. 1 and 2, the seat back frame 10 is bent in a mountain shape provided between a side frame 11 made of a pair of left and right vertically elongated steel plates and the upper end portions of the side frames 11. The upper frame 12 is made of a steel pipe material of the shape formed, and the reinforcing plate 13 is made of a horizontally-long steel plate material provided between the lower portions of the side frames 11. Each side frame 11 is cut into a vertically long shape by pressing a sheet of steel plate, and then bent into a flange shape so that the front edge portion and the rear edge portion are bent inside the seat. Is formed.

  Accordingly, each side frame 11 has a side surface portion 11A that faces in the seat width direction, a front surface portion 11B that is bent inward from the front edge portion of the side surface portion 11A and faces the front side of the seat, and the side surface portion 11A. And a rear surface portion 11C which is bent from the rear edge portion toward the inner side of the sheet and faces toward the rear side of the sheet. Here, the side surface portion 11A corresponds to the “first surface portion” of the present invention, and the front surface portion 11B and the rear surface portion 11C each correspond to the “second surface portion” of the present invention. The front surface portion 11B and the rear surface portion 11C are formed by being bent at an angle of approximately 90 degrees from the side surface portion 11A to the inside of the sheet. Each side frame 11 has a configuration in which each side frame 11 has a rounded shape in which the front edge and the rear edge of the side surface portion 11A are not angular with respect to the outside by pressing, and safety is improved. It has become.

  Further, each side frame 11 is formed such that an intermediate portion thereof is bent into an arcuate shape on the rear side of the seat. As a result, each side frame 11 is formed at both side positions of the waist of the seated occupant so that the shape of the side frame 11 protrudes to the front side of the seat, and the side support that supports the waist of the seated occupant from both outsides. It is set as the structure which can set a part large, or can strongly support a waist | hip | lumbar part in the position of the seat front side. Further, each side frame 11 has a shape warped to the rear side of the seat as described above, so that a wider knee space where an occupant sitting in the rear seat can throw out his / her foot forward can be secured. It has a configuration.

  The upper frame 12 is formed by bending one steel pipe material into the mountain shape by press working. The upper frame 12 is in a state of being firmly and integrally coupled to each side frame 11 by attaching the end portions on both sides to the upper end portion of each side frame 11 and welding them. . The reinforcing plate 13 is provided between the lower portions of the rear surface portions 11C of the both side frames 11 described above, and is integrally welded and coupled to the rear surface portions 11C.

  Each block body 20 is made of resin, and is formed on the inner corner portion between the side surface portion 11A and the front surface portion 11B that bend each other and the inner corner portion between the side surface portion 11A and the rear surface portion 11C. Each is integrally formed. Specifically, each block body 20 has a vertically long shape that continuously extends over a wide region in the height direction from the upper region to the lower region of each side frame 11 with respect to each inner corner portion of each side frame 11 described above. As shown in FIG. 3, it is provided in a state in which it is in contact with and joined to each inner corner without any gap.

  Specifically, each block body 20 provided at the inner corner between the side surface portion 11A and the front surface portion 11B of each side frame 11 is formed in the through hole 11A1 and the front surface portion 11B formed in the side surface portion 11A of each side frame 11. Each of the side frames 11 is integrally formed with the resin material entering the formed through-holes 11B1. Thereby, each block body 20 disposed on the front side is bonded to each side frame 11 as a state in which the protruding portions 21 and 22 are integrally embedded in the respective through holes 11A1 and 11B1. And are firmly joined together. Each of the above-described through holes 11A1 and 11B1 is formed at two positions in the height direction of each side frame 11.

  Further, each block body 20 provided at the inner corner between the side surface portion 11A and the rear surface portion 11C of each side frame 11 is also formed in the through hole 11A1 and the rear surface portion 11C formed in the side surface portion 11A of each side frame 11. Each of the side frames 11 is integrally formed with the resin material entering the through-holes 11C1. Accordingly, each block body 20 disposed on the rear side is also attached to each side frame 11 as a state in which the projecting portions 21 and 22 are integrally embedded in the respective through holes 11A1 and 11C1. On the other hand, it is in a state of being firmly and integrally joined. The through holes 11A1 and 11C1 described above are also formed at two positions in the height direction of each side frame 11.

  As described above, each block body 20 is formed by integrally molding the resin material with respect to each side frame 11, so that each side frame 11 is bent into a bow-like shape on the rear side as described above. Even if it is formed, it is formed as a state in which it is closely adhered to each inner corner portion of each side frame 11 without gaps, and is firmly bonded integrally in a state along the shape of each side frame 11 It is in a state.

  Each block body 20 may be configured to be separately assembled to each inner corner portion of each side frame 11 later. Specifically, the protrusions 21 and 22 having the above-described shape are formed on each block body 20, and the protrusions 21 and 22 are formed in the through holes 11A1 and 11B1 (or 11C1) formed in the side frames 11, respectively. What is necessary is just to make it assemble | attach to each side frame 11 integrally. In addition, after the above assembly, each block body 20 is separately and firmly joined to each side frame 11 using an adhesive, a bolt / nut fastener, or the like, thereby further increasing the joint strength. it can.

  Each of the block bodies 20 has a solid cross section filled with contents, and the cross-sectional shape is formed in the shape of a right triangle that is in surface contact with the two surfaces of the side surface portion 11A and the front surface portion 11B or the rear surface portion 11C. Has been. That is, each block body 20 includes a part point 20A on the outer peripheral side of the part surface that makes surface contact with the side surface part 11A, and a part point 20B on the outer peripheral side of the part surface that makes surface contact with the front part 11B or the rear surface part 11C. A surface 20 </ b> C extending in between is formed into a right triangle shape that is a straight inclined surface.

  By providing each block body 20 having the above-described configuration at each inner corner of each side frame 11, when the above-described large load is input to the seat back frame 10 from the front side of the vehicle, the front portion 11B of each side frame 11 is provided. Tries to bend so that it bends backward toward the side surface 11A starting from the bending point with the side surface portion 11A, or toward the rear surface portion 11C starting from the bending point between the side surface portion 11A and the rear surface portion 11C. The movement which tries to deform | transform so that it may bend in the back side is blocked | prevented by each block body 20 interposed in these internal corners.

  Specifically, each block body 20 has a solid cross section with high structural strength, and extends to the inner corner with respect to the two surfaces of the side surface portion 11A and the front surface portion 11B or the rear surface portion 11C of each side frame 11. Since the surface is in wide contact with no gap and is integrally joined thereto, the above deformation can be received with a strong force. More specifically, each block body 20 includes a part point 20A on the outer peripheral side of the part surface that makes surface contact with the side surface part 11A and a part on the outer peripheral side of the part surface that makes surface contact with the front surface part 11B or the rear surface part 11C. The surface 20C straddling the point 20B is formed in the shape of a right triangle that is a straight inclined surface that coincides with the straight line 20D that connects the site points 20A and 20B on the outer peripheral edge side, and thus Even when subjected to a large load action at the time of preventing bending deformation, the deformation movement described above can be prevented with a strong force without buckling the shape.

  Moreover, as shown in FIGS. 1-2, the state where each vertically long block body 20 was integrally joined to each inner corner of each side frame 11 over a wide range in the height direction as described above. When the large load described above is input to the seat back frame 10, the seat back frame 10 is supported in a cantilevered manner by the reclining devices 5 described above. The load that is about to be bent backward by the fulcrum is supported by each of the block bodies 20. In this way, by providing each block body 20 with a solid cross section having a high structural strength at each inner corner of each side frame 11, bending deformation of the cross-sectional shape of each side frame 11 is effectively prevented. In addition, the bending rigidity of each side frame 11 is also effectively increased, and an effective reinforcing function can be obtained by adding each block body 20 that is compact and light.

  Next, the configuration of the vehicle seat frame (seat back frame 10) according to the second embodiment will be described with reference to FIG. In the present embodiment, portions that are substantially the same in configuration and operation as those of the seat back frame 10 shown in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and different configurations are described in detail. I will explain. In the present embodiment, as shown in FIG. 4, each block body 20 is formed in a rectangular cross section.

  Specifically, each block body 20 includes a part point 20A on the outer peripheral side of a part surface that makes surface contact with the side surface part 11A of each side frame 11, and a part surface that makes surface contact with the front surface part 11B or the rear surface part 11C. A surface 20C extending between the outer peripheral edge portion point 20B and the outer peripheral edge portion point 20A is formed in a rectangular cross-sectional shape that swells more than the straight line 20D connecting the outer peripheral edge portion points 20A and 20B. Thereby, even if each block body 20 receives the big load action at the time of preventing the bending deformation of each side frame 11, it prevents the side frame 11 from bending deformation with a strong force without buckling the shape. Be able to. In this way, by providing each block body 20 with a solid cross section having a high structural strength at each inner corner of each side frame 11, bending deformation of the cross-sectional shape of each side frame 11 is effectively prevented. In addition, the bending rigidity of each side frame 11 is also effectively increased, and an effective reinforcing function can be obtained by adding each block body 20 that is compact and light.

  Next, the configuration of the vehicle seat frame (seat back frame 10) according to the third embodiment will be described with reference to FIG. In the present embodiment, portions that are substantially the same in configuration and operation as those of the seat back frame 10 shown in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and different configurations are described in detail. I will explain. In this embodiment, as shown in FIG. 5, each block body 20 is formed in a cross-sectional fan shape.

  Specifically, each block body 20 includes a part point 20A on the outer peripheral side of a part surface that makes surface contact with the side surface part 11A of each side frame 11, and a part surface that makes surface contact with the front surface part 11B or the rear surface part 11C. A surface 20C straddling between the outer peripheral side portion points 20B is formed in a fan-shaped cross section having a shape swollen more than a straight line 20D connecting the outer peripheral side portion points 20A, 20B. Thereby, even if each block body 20 receives the big load action at the time of preventing the bending deformation of each side frame 11, it prevents the side frame 11 from bending deformation with a strong force without buckling the shape. Be able to. In this way, by providing each block body 20 with a solid cross section having a high structural strength at each inner corner of each side frame 11, bending deformation of the cross-sectional shape of each side frame 11 is effectively prevented. In addition, the bending rigidity of each side frame 11 is also effectively increased, and an effective reinforcing function can be obtained by adding each block body 20 that is compact and light.

  As mentioned above, although embodiment of this invention was described using the three Examples, this invention can be implemented with various forms other than the said Example. For example, as shown in FIG. 6, each block body 20 is connected to the side surface portion 11 </ b> A as a state in which the block bodies 20 are combined in a state of being in surface contact with only the front surface portion 11 </ b> B or the rear surface portion 11 </ b> C of each side frame 11. It may be provided so as to face a close position. Alternatively, as shown in FIG. 7, each block body 20 is connected to the front surface portion 11 </ b> B or the rear surface portion 11 </ b> C as a state in which the block bodies 20 are combined in a state of being in surface contact with only the side surface portion 11 </ b> A of each side frame 11. It may be provided so as to face a close position. Even in these cases, the front surface portion 11B of each side frame 11 is deformed so as to be bent backward toward the side surface portion 11A starting from the bending point with the side surface portion 11A, or the side surface portion 11A is rearward. Movements that are deformed so as to bend backward toward the rear surface portion 11C starting from the bending point with the surface portion 11C can be effectively prevented by the respective block bodies 20 interposed in the respective inner corner portions.

  Moreover, in each said Example, each block body 20 is each formed in the longitudinally long shape of a solid cross section, and extends continuously over the wide area | region of the height direction from the upper area | region of each side frame 11 to a lower area | region. The block body 20 is illustrated as being provided so as to effectively prevent bending deformation of the cross-sectional shape of each side frame 11 and effectively increase the bending rigidity of each side frame 11. May be provided so as to be intermittently arranged in the height direction with respect to each side frame 11. Alternatively, each block body 20 may be provided locally only in a portion of the seat back frame 10 where a backrest load such as a waist or a shoulder blade of a seated occupant acts intensively. Further, in each of the above embodiments, each block body 20 is exemplified by a resin material integrally formed on the inner corner of each side frame 11, but each block body is formed of a material other than a resin such as metal. It may be a thing.

  In addition, the “vehicle seat frame” of the present invention is not limited to the application as the seat back frame 10 as shown in each of the above embodiments, but other skeletons such as the skeleton frame (seat cushion frame 30) of the seat cushion 3. It can also be applied as a part. In addition, the “block body” of the present invention may be provided in a state where it is integrally coupled to at least the first surface portion and is in contact with the second surface portion or in a state of being close to the second surface portion. It may be provided at the inner corner between the bent first surface portion and the second surface portion or may be provided at the outer corner portion. By providing the block body at the inner corner portion, the movement bent in the approach direction (the angle direction side where the block body is provided) between the first surface portion and the second surface portion is prevented. Further, by providing the block body at the outer corner portion, the movement bent in the separation direction (the angle direction side where the block body is provided) between the first surface portion and the second surface portion is prevented. . Further, the cross-sectional shape of the block body is not limited to the solid cross-sectional shape shown in each of the above embodiments, and various solid cross-sectional shapes such as a trapezoidal shape, a circular shape, a semicircular shape, or a polygonal shape are applied. can do.

DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Seat back 3 Seat cushion 4 Headrest 5 Reclining device 6 Release lever 6A Connecting rod 7 Spiral spring 10 Seat back frame (vehicle seat frame)
11 Side frame 11A Side surface (first surface)
11A1 Through-hole 11B Front part (2nd surface part)
11B1 Through-hole 11C Rear surface part (second surface part)
11C1 Through-hole 12 Upper frame 13 Reinforcement plate 20 Block body (block body)
20A Site point on the outer periphery side 20B Site point on the outer periphery side 20C Surface 20D Straight line 21 Projection portion 22 Projection portion 30 Seat cushion frame 31 Side frame

Claims (3)

A vehicle seat frame having a cross-sectional shape including a first surface portion and a second surface portion that bend each other,
A block body having a solid cross section that is integrally coupled to at least the first surface portion and is provided in a state of being in contact with the second surface portion or facing a position close to the second surface portion; Thus, the vehicle seat frame is configured such that the movement of the one surface portion being bent with respect to the other surface portion in the angle direction side where the block body is provided is prevented. The vehicle seat frame according to claim 1,
The vehicle seat frame, wherein the block body is provided in a state of being integrally coupled to the first surface portion and the second surface portion, respectively. The vehicle seat frame according to claim 1 or 2,
The block body is provided in a state of being in surface contact with a corner portion between the first surface portion and the second surface portion without a gap, and a solid cross section thereof is provided on the first surface portion. A vehicle seat frame characterized by having a cross-sectional shape that swells more than a straight line connecting a part point on the outer peripheral side in surface contact with the part point on the outer peripheral side in surface contact with the second surface part. .

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