JP2006081676A - Seat back frame structure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat back frame structure of a vehicle, which secures a required strength and stiffness and realizes a more weight saving. <P>SOLUTION: In the seat back frame structure of a vehicle, a cushion material support part which supports the back of a cushion material is provided, a hollow resin frame body with which reinforcing rib having a recessed cross-section recessed toward the hollow inside is integrally formed, the first metal frame which is extended mostly along the upper edge of the resin frame body and the second metal frame body which is arranged in the reinforcing rib and has the upper end joined to the middle section of the first metal frame body and the lower end extend to the lower hem of the resin frame body are provided, the lower end of the second metal frame body is further extended mostly along the lower hem and is joined to a metal hinge member arranged at the ends in the width direction of the resin frame body. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

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

  As a seat back frame structure for a vehicle seat as described above, a metal pipe material is arranged on the outer periphery, and a metal plate material such as a steel plate is disposed in a region substantially surrounded by the pipe material. What has been arranged and configured is conventionally common. Then, the seat back frame configured as described above is covered with a cushioning material, a skin material, and the like to form a seat back that supports the back of the seated occupant.

By the way, in recent years, as a part of meeting the demand for vehicle weight reduction, there has been a demand for further weight reduction of seats. For this reason, it is considered that the main part of the seat back frame occupying a relatively large weight among the seat constituent members is formed of a resin molded body. For example, Patent Document 1 discloses a structure in which a frame body formed of a metal plate material and a metal pipe is covered with a resin molded body obtained by blow molding.
JP 2000-023777 A

Thus, by forming the main part of the seat back frame from the resin molded body, the weight of the seat back frame can surely be reduced, but how the strength and rigidity required for the seat back frame can be increased. Ensuring it is an important issue.
For example, when the vehicle suddenly stops with the luggage placed behind the seat back, the luggage may move forward and collide with the seat back. Accordingly, the seat back frame is required to have strength and rigidity that can withstand such a collision load.

  For this reason, it is possible to improve the strength and rigidity of the seat back frame by setting the thickness of the resin molded body to be thicker. However, since the thickness of the entire seat back cannot be increased unnecessarily in the cabin space where space is limited, the thickness of the cushion material increases as the resin molded body of the seat back frame increases as described above. As a result, it is necessary to set the thickness of the vehicle to be thin, and passenger comfort is impaired.

  Therefore, the present invention, when a seat back frame is configured by combining a metal frame body and a resin frame body, ensures the required strength and rigidity without increasing the thickness of the seat back frame, and further reduces the weight. It was made for the purpose of realizing.

  For this reason, the invention according to claim 1 of the present application is a seat back frame structure of a vehicle seat formed by combining a metal frame body and a resin frame body, and includes a cushion material support portion that supports the back side of the cushion material. A hollow plate-shaped resin frame body integrally formed with a reinforcing rib having a concave cross-section recessed into the hollow interior at least in the cushion material support portion, and a support member for supporting the headrest is attached, and an upper side of the resin frame body A first metal frame extending substantially along the portion and a reinforcing rib disposed in the reinforcing rib, the upper end being joined to the middle portion of the first metal frame, while the lower end being the resin frame. A second metal frame body extending to a lower side portion of the second metal frame body, and a lower end side of the second metal frame body is further extended substantially along the lower side portion, and the resin frame It is joined to the metallic hinge member disposed on an end portion in the vehicle width direction of the arm member, that is obtained by said.

  In the invention according to claim 2 of the present application, in the invention according to claim 1, the resin frame body is provided with an armrest disposition portion in which an armrest is disposed on a side in the vehicle width direction of the cushion material support portion. The second metal frame body is disposed between the cushion material support portion and the armrest disposition portion.

  Furthermore, the invention according to claim 3 of the present application is a seat back frame structure for a vehicle seat formed by combining a metal frame body and a resin frame body, and a cushion material support portion that supports the back side of the cushion material; A flat plate shape integrally formed with a reinforcing rib that is recessed in a cross-sectional concave shape in at least the cushion material support portion, and is provided on the side of the cushion material support portion in the vehicle width direction. A resin frame body, a support member for supporting the headrest, a first metal frame body extending substantially along the upper side of the resin frame body, the cushion material support section, and the armrest arrangement The upper end side is joined to the middle portion of the first metal frame body, while the lower end side is disposed in the reinforcing rib. A second metal frame body extending to a lower side portion of the oil frame body, and a lower end side of the second metal frame body is further extended substantially along the lower side portion, and a vehicle width direction of the resin frame body It joins to the metal hinge member arrange | positioned at the edge part in this.

  Furthermore, the invention according to claim 4 of the present application is characterized in that, in the invention according to claim 3, the resin frame body is a hollow body formed in a hollow shape.

  Furthermore, in the invention according to claim 5 of the present application, in the invention according to claim 4, the resin frame body is integrally formed with a reinforcing rib having a concave cross section extending substantially in the vertical direction and recessed into the hollow interior. It is a feature.

  Still further, according to a sixth aspect of the present invention, in any one of the first, second, and fifth aspects, the concave bottom portion of the reinforcing rib is joined to the opposing surface portions of the resin frame body. It is characterized by that.

  Furthermore, the invention according to claim 7 of the present application is characterized in that, in any one of the inventions according to claims 1, 2, 4 to 6, the resin frame body is molded by a blow molding method. It is.

  Furthermore, the invention according to claim 8 of the present application is a seat back frame structure for a vehicle seat that is a combination of a metal frame body and a resin frame body, and includes a cushion material support portion that supports the back side of the cushion material. A flat resin frame body integrally formed with reinforcing ribs recessed in a concave cross section in the cushion material support portion and a support member for supporting the headrest are attached, and substantially along the upper side portion of the resin frame body A first metal frame body extended and a second metal frame body whose upper end side is joined to a middle portion of the first metal frame body and whose lower end side extends to the lower side of the resin frame body. Provided, the lower end side of the second metal frame body is further extended substantially along the lower side portion, and is disposed at an end portion in the vehicle width direction of the resin frame body. Is joined to the genus made hinge member, it is obtained by said.

  Still further, according to a ninth aspect of the present invention, in any one of the first to eighth aspects, a seat belt locking member for locking the seat belt is attached to the first metal frame body. It is characterized by that.

  Still further, the invention according to claim 10 of the present application is the seat back frame structure according to any one of claims 1 to 9, wherein the seat back frame structure is used for a seat back of a rear seat of a wagon type or hatch back type vehicle. It is characterized by being.

According to the invention of claim 1 of the present application, since the resin frame body is formed in a hollow flat plate shape, further weight reduction of the seat back frame can be achieved. In this case, the resin frame body is integrally formed with a reinforcing rib having a concave cross section recessed into the hollow interior, so that the strength and rigidity of the resin frame itself can be effectively ensured.
Further, the resin frame body is provided with a first metal frame body extending substantially along the upper side of the resin frame body and the reinforcing rib, and an upper end side of the first metal frame body. A metal hinge that is joined to the middle portion of the resin frame and that has a lower end extending to the lower side portion of the resin frame body and extending substantially along the lower side portion and disposed at an end portion in the vehicle width direction of the resin frame body By arranging the second metal frame body to be joined to the member, the seat back frame can be effectively reinforced without increasing the thickness of the entire seat back frame, and its strength And the rigidity can be increased. In this case, since the seat back frame can be reinforced with a shorter metal frame body as compared with the case where a plate material or a pipe-like metal frame is disposed on almost the entire circumference of the seat back, further weight reduction can be realized.

  Further, according to the invention of claim 2 of the present application, an effect similar to that of claim 1 can be obtained. In particular, in the case where the resin frame body further includes an armrest disposition portion on the side of the cushion material support portion in the vehicle width direction, the second metal frame body is between the cushion material support portion and the armrest disposition portion. Therefore, the resin frame body can be reinforced more effectively.

  According to the invention of claim 3 of the present application, the resin frame body includes a first metal frame body extending substantially along the upper side of the resin frame body, a cushion material support portion, and an armrest arrangement. And the upper end side is joined to the middle part of the first metal frame body, while the lower end side extends to the lower side part of the resin frame body and substantially along the lower side part. A second metal frame body that is extended and joined to a metal hinge member that is disposed at an end of the resin frame body in the vehicle width direction. The seat back frame can be effectively reinforced without increasing the thickness, and the strength and rigidity can be increased. In this case, since the seat back frame can be reinforced with a shorter metal frame body as compared with the case where a plate material or a pipe-like metal frame is disposed on almost the entire circumference of the seat back, further weight reduction can be realized.

  Furthermore, according to the invention of claim 4 of the present application, the same effect as that of the invention of claim 3 can be obtained. In particular, since the resin frame body is formed in a hollow shape, further weight reduction of the seat back frame can be achieved. In this case, the resin frame body is integrally formed with a reinforcing rib having a concave cross section recessed into the hollow interior, so that the strength and rigidity of the resin frame itself can be effectively ensured.

  Further, according to the invention of claim 5 of the present application, the same effect as that of the invention of claim 4 can be obtained. In particular, since the reinforcing rib having a concave cross section extending substantially in the vertical direction and recessed into the hollow interior is integrally formed on the resin frame body, the resin frame body can be effectively reinforced with a relatively simple structure.

  Furthermore, according to the sixth aspect of the present invention, the same effect as any one of the first, second and fifth aspects of the present invention can be achieved. In particular, since the concave bottom portions of the reinforcing ribs formed on the resin frame body are joined to the opposing surface portions of the resin frame body, the resin frame body can be reinforced more effectively with a relatively simple structure. Can do.

  Furthermore, according to the invention of claim 7 of the present application, the same effect as any one of the inventions of claims 1, 2, 4 to 6 can be obtained. In particular, since the resin frame body is molded by a blow molding method excellent in mass productivity, a hollow resin frame body in which a reinforcing rib having a concave cross section recessed into the hollow interior is integrally formed can be obtained relatively easily and at low cost. Obtainable.

  Still further, according to the invention of claim 8 of the present application, the resin frame body includes a first metal frame body extending substantially along the upper side of the resin frame body, and an upper end side of the first metal frame. A metal which is joined to the middle part of the frame body, and whose lower end side extends to the lower side part of the resin frame body and extends substantially along the lower side part, and is arranged at an end part in the vehicle width direction of the resin frame body By arranging the second metal frame body joined to the hinge member, the seat back frame can be effectively reinforced without increasing the thickness of the entire seat back frame, Its strength and rigidity can be increased. In this case, since the seat back frame can be reinforced with a shorter metal frame body as compared with the case where a plate material or a pipe-like metal frame is disposed on almost the entire circumference of the seat back, further weight reduction can be realized.

  Still further, according to the ninth aspect of the present invention, the same effect as any one of the first to eighth aspects of the present invention can be achieved. In particular, since the seat belt locking member is attached to the first metal frame body, the attachment portion of the seat belt locking member can be effectively reinforced and the strength and rigidity thereof can be increased.

  Furthermore, according to the invention of claim 10 of the present application, the same effect as any one of the inventions of claims 1 to 9 can be obtained. In particular, in a wagon type or hatchback type vehicle, there is no vertical wall part rising from the floor panel as in the case of a sedan type vehicle behind the rear seat, so the seat back of the rear seat cannot be supported from the back side, Although it is supported by the body only at the end in the vehicle width direction, it effectively reinforces the seat back frame when used for the seat back of the rear seat of such a wagon type or hatchback type vehicle, and its strength and rigidity Can be secured.

  Hereinafter, a case where an embodiment of the present invention is applied to, for example, a seat back frame of a rear seat of an automobile will be described with reference to the accompanying drawings.

  1 is a perspective view of a seat back frame of an automobile seat according to an embodiment of the present invention, FIG. 2 is a front explanatory view of the seat back frame shown in FIG. 1, and FIG. 3 is a Y3-Y3 line in FIG. FIG. 4 is an explanatory cross-sectional view taken along line Y4-Y4 in FIG.

As shown in these drawings, the seat back frame 1 is configured by combining a metal frame body 10 and a resin frame body 20 to form a main part thereof. Metal hinge members 15 that connect the seat back frame 1 to a rear portion of a seat seat (seat cushion) (not shown) are fixed to lower portions of both ends of the resin frame body 20 in the vehicle width direction.
First, the metal frame body 10 will be described. The metal frame body 10 has a first metal frame body 11 extending substantially along the upper side of the resin frame body 20 and an upper end side joined to a middle portion of the first metal frame body 11 and a lower end. The second metal frame body 12 has a side extending to the lower side of the resin frame body 20.

  The second metal frame body 12 has an upper end side joined to a middle portion of the first metal frame body 11 and extends to the lower side of the resin frame body 20, and a lower side of the resin frame body 20. And a laterally extending portion 12b joined to the metal hinge member 15 disposed at the end of the resin frame body 20 in the vehicle width direction. The longitudinal frame portion 12a And the lateral extension 12b are integrally formed. That is, the metal frame body 10 as a whole is formed in a front shape similar to a shape obtained by extending one side of the upper side of the alphabet capital letter “J”. Therefore, the metal frame body is shorter than in the case where a plate material or a pipe-shaped metal frame is disposed on almost the entire circumference of the conventional seat back.

  The first metal frame body 11 and the second metal frame body 12 are manufactured using, for example, a metal pipe material such as a steel pipe having an annular cross section, and the second metal frame body. 12 is manufactured by, for example, bending by press working.

  As shown in FIG. 1, a support member 21 that supports a headrest (not shown) that supports the head of an occupant is attached to the first metal frame body 11. In FIG. 1, only the headrest frame 22 of the headrest (not shown) is shown. As described above, since the headrest support member 21 is attached to the first metal frame body 11, the support strength and rigidity of the headrest support member 21 can be increased.

  Further, a retractor (not shown) as a seat belt locking member for locking a seat belt (not shown) is installed on an upper one side (right side in the present embodiment) portion 1c of the seat back frame 1, and its mounting portion Is fixed to the first metal frame body 11. Therefore, it is possible to effectively reinforce the attachment portion of the seat belt locking member and increase its supporting strength and rigidity.

Next, the resin frame body 20 will be described. The resin frame body 20 is formed in a hollow flat plate shape, and the reinforcing ribs 16 are formed in a concave cross section recessed into the hollow interior as shown in FIGS. As shown in FIG. 2, the reinforcing rib 16 extends substantially in the vertical direction of the resin frame body 20, and has a connecting portion 18 having a predetermined length and a node portion 19 formed between the connecting portions 18. It is comprised by.
Both the connecting portion 18 and the node portion 19 are formed in a concave cross section that is recessed into the hollow interior of the resin frame body 20, but the node portion 19 has a depth of a rib that is formed in a concave shape compared to the connecting portion 18. Is formed shallow.

  In the reinforcing rib 16, the connecting portions 18 and the node portions 19 are alternately provided in the vertical direction. More preferably, the plurality of reinforcing ribs 16 extending in parallel are set so that the connecting portions 18 and the node portions 19 of the adjacent reinforcing ribs 16 are staggered as shown in the figure.

  Since the resin frame body 20 is formed by a blow molding method, it is excellent in mass productivity, and it is relatively easy to form a hollow resin frame body integrally formed with a reinforcing rib having a concave cross-section recessed into the hollow interior. And it can be obtained at low cost.

  As described above, since the resin frame body is formed in a hollow flat plate shape, further reduction in weight of the seat back frame can be achieved. In this case, the resin frame body is integrally formed with a reinforcing rib having a concave cross section recessed into the hollow interior, so that the strength and rigidity of the resin frame itself can be effectively ensured.

  As shown in FIG. 3, the second metal frame body 12 is disposed in a reinforcing rib 16 formed in the resin frame body 20. In this way, the resin frame body is disposed within the reinforcing rib and the first metal frame body extending substantially along the upper side of the resin frame body, and the upper end side is the first metal frame body. While being joined to the middle part of the metal frame body, the lower end side extends to the lower side part of the resin frame body and extends substantially along the lower side part, and is arranged at the end part in the vehicle width direction of the resin frame body. By arranging the second metal frame body joined to the metal hinge member, the seat back frame can be effectively reinforced without increasing the thickness of the entire seat back frame. , Its strength and rigidity can be increased. In this case, since the seat back frame can be reinforced with a shorter metal frame body as compared with the case where a plate material or a pipe-like metal frame is disposed on almost the entire periphery of the seat back, further weight reduction can be realized.

In particular, in this embodiment, the resin frame body 20 is positioned on the side of the cushion material support portion 20a in the vehicle width direction and the armrest is disposed on the cushion material support portion 20a that supports the back side of the cushion material. Armrest disposing portion 20b.
In the present embodiment, the vertical frame portion 12a of the second metal frame body 12 is disposed between the cushion material support portion 20a and the armrest placement portion 20b, and the resin frame body 20 is more It can be effectively reinforced.

  As described above, in the present embodiment, the resin frame body is integrally formed with the reinforcing rib having a concave cross section extending substantially in the vertical direction and recessed into the hollow interior, so that the resin frame body is effective with a relatively simple structure. Can be reinforced.

  As described above, the resin frame body 20 is formed with the reinforcing ribs 16 having a concave cross section recessed into the hollow interior. FIG. 5 is a cross-sectional explanatory view taken along line Y5-Y5 in FIG. 2 and shows the reinforcing rib 16 in an enlarged manner. As shown in the figure, the concave bottom portions 16 a of the reinforcing ribs 16 formed on the resin frame body 20 are joined to the opposing surface portions of the resin frame body 20.

  As described above, since the concave bottom portions of the reinforcing ribs formed on the resin frame body are joined to the opposing surface portions of the resin frame body, the resin frame body can be made more effective with a relatively simple structure. Can be reinforced.

  FIG. 6 is a cross-sectional explanatory view showing another embodiment of the reinforcing rib. Reinforcing ribs 46 are formed on the resin frame body 50, and ribs 47 having a concave cross section that are recessed toward the hollow interior are formed on opposing surface portions of the resin frame body 50. When the concave bottom portions 46a and 47a of the ribs 46 and 47 are joined together, the bottom portion 46a of the concave reinforcing rib 46 is joined to the opposing surface portions. In this manner, the resin frame body can be more effectively reinforced as in the above embodiment.

The seat back frame structure described above is used for a seat back of a rear seat of a wagon type or hatch back type vehicle, for example. In the above vehicle, since there is no side wall portion that rises from the floor panel as in the case of a sedan type vehicle behind the rear seat, the seat back of the rear seat cannot be supported from the back side, only the end portion in the vehicle width direction In this case, the seat back frame can be effectively reinforced and its strength and rigidity can be ensured.
Of course, the seat back frame can also be used for the seat back of the rear seat of a sedan type vehicle as described above.

  Moreover, although the said seat back frame is described about the split-type rear seat, it does not need to be a split-type. Further, the front seat or other seats can be used similarly.

  In the said embodiment, although the resin frame body 20 is comprised by the hollow body formed in the hollow shape, a solid or flat resin frame body may be used.

  As described above, the present invention is not limited to the illustrated embodiments, and it goes without saying that various improvements and design changes can be made without departing from the gist of the present invention.

  The present invention is a seat back frame structure of a vehicle seat formed by combining a metal frame body and a resin frame body, and can be suitably applied to, for example, a seat back of a rear seat of an automobile seat.

It is a perspective view of a seat back frame concerning an embodiment of the present invention. It is front explanatory drawing of the seat back frame shown in FIG. FIG. 3 is a cross-sectional explanatory view taken along line Y3-Y3 in FIG. FIG. 3 is a cross-sectional explanatory view taken along line Y4-Y4 in FIG. FIG. 3 is a cross-sectional explanatory view taken along line Y5-Y5 in FIG. It is sectional explanatory drawing which showed another embodiment of the reinforcement rib.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Seat back frame 10 Metal frame body 11 1st metal frame body 12 2nd metal frame body 15 Metal hinge 16 Reinforcement rib 18 Connection part 19 Node part 20 Resin frame body 21 Support member

Claims (10)

A seat back frame structure for a vehicle seat comprising a combination of a metal frame body and a resin frame body,
A hollow plate-like resin frame body comprising a cushion material support portion for supporting the back side of the cushion material, and at least the cushion material support portion integrally formed with a reinforcing rib having a concave cross section recessed into the hollow interior;
A support member for supporting the headrest is attached, and a first metal frame body extending substantially along the upper side of the resin frame body;
A second metal frame body disposed in the reinforcing rib, the upper end side being joined to the middle part of the first metal frame body, and the lower end side extending to the lower side of the resin frame body;
The lower end side of the second metal frame body is further extended substantially along the lower side portion and joined to a metal hinge member disposed at an end portion in the vehicle width direction of the resin frame body.
A vehicle seat back frame structure. The resin frame body further includes an armrest disposition portion where an armrest is disposed on a side of the cushion material support portion in the vehicle width direction,
The second metal frame body is disposed between the cushion material support portion and the armrest placement portion,
The vehicle seat back frame structure according to claim 1. A seat back frame structure for a vehicle seat comprising a combination of a metal frame body and a resin frame body,
A cushioning material support part that supports the back side of the cushioning material, and an armrest placement part that is located on a side of the cushioning material support part in the vehicle width direction and in which an armrest is placed, and at least the cushioning material support part A flat resin frame body integrally formed with reinforcing ribs recessed in a cross-sectional shape;
A support member for supporting the headrest is attached, and a first metal frame body extending substantially along the upper side of the resin frame body;
It is arrange | positioned in the said reinforcement rib between the said cushion material support part and the said armrest arrangement | positioning part, and while an upper end side is joined to the middle part of the said 1st metal frame body, a lower end side is a lower side of the said resin frame body A second metal frame body extending to the portion,
The lower end side of the second metal frame body is further extended substantially along the lower side portion and joined to a metal hinge member disposed at an end portion in the vehicle width direction of the resin frame body.
A vehicle seat back frame structure.   The vehicle seat back frame structure according to claim 3, wherein the resin frame body is a hollow body formed in a hollow shape.   The vehicle seat back frame structure according to claim 4, wherein a reinforcing rib having a concave cross section extending substantially vertically and recessed into a hollow interior is integrally formed on the resin frame body.   The vehicle seat back frame structure according to any one of claims 1, 2, and 5, wherein a concave bottom portion of the reinforcing rib is joined to opposing surface portions of the resin frame body.   The vehicle seat back frame structure according to claim 1, wherein the resin frame body is molded by a blow molding method. A seat back frame structure for a vehicle seat comprising a combination of a metal frame body and a resin frame body,
A flat resin frame body that includes a cushion material support portion that supports the back side of the cushion material, and at least the reinforcing ribs that are recessed in a cross-sectional concave shape are integrally formed in the cushion material support portion;
A support member for supporting the headrest is attached, and a first metal frame body extending substantially along the upper side of the resin frame body;
The upper end side is joined to the middle part of the first metal frame body, while the lower end side includes a second metal frame body extending to the lower side of the resin frame body,
The lower end side of the second metal frame body is further extended substantially along the lower side portion and joined to a metal hinge member disposed at an end portion in the vehicle width direction of the resin frame body.
A vehicle seat back frame structure.   The vehicle seat back frame structure according to any one of claims 1 to 8, wherein a seat belt locking member for locking the seat belt is attached to the first metal frame body. The vehicle seat back frame structure according to any one of claims 1 to 9, wherein the seat back frame structure is used for a seat back of a rear seat of a wagon type or hatch back type vehicle.

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