JP6802506B2 - Seat frame and vehicle seat - Google Patents

Description

The present invention relates to a seat frame and sheet for a vehicle, in particular, it relates to a sheet for a vehicle comprising a seat frame and a seat frame having a metal portion and the resin portion.

In recent years, some vehicle seats have been made lighter by molding a part or all of the seat back frame and the seat cushion frame with a resin material such as plastic in order to improve the fuel efficiency of the vehicle.
It has been proposed to form the seat frame with a resin having a double wall structure as a vehicle seat frame capable of ensuring rigidity (described as strength in the same document) while achieving weight reduction in this way. (See Patent Document 1).

More specifically, in Patent Document 1, it is possible to secure rigidity while reducing the weight by forming a seat frame composed of a seat cushion frame and a seat back frame into a double wall structure by blow molding resin. Have been described.

Further, Patent Document 2 discloses a seat back which is lightweight, has high strength, and has a low manufacturing cost by having a round pipe integrally embedded in a skin and a resin base material over the entire circumference. There is.

Japanese Unexamined Patent Publication No. 2001-231654 Jitsufuku No. 7-16365

However, like the vehicle seat frame described in Patent Document 1, the weight can be reduced by being molded with resin, but the impact applied to the seat frame in the event of an accident is caused only by making the resin a double wall structure. It was difficult to secure sufficient rigidity.
Further, in the vehicle seat back described in Patent Document 2, a round pipe is embedded in a resin base material, but it is difficult to secure rigidity against an impact such as a side collision. Further, since the resin base material is in contact with only the outer peripheral surface of the round pipe, the bonding strength between the round pipe and the resin base material may not be sufficient.
Then, only one round pipe (in a frame shape) is embedded in the resin base material constituting the seat back over the entire circumference thereof. For this reason, when the headrest stay as a tubular member is attached to the round pipe, it is attached to one side of the round pipe, so that the attachment strength may not be sufficient.

The present invention has been made in view of the above problems, its object is lightweight, and is to provide a seat frame and sheet for a vehicle capable of ensuring rigidity.
Another object of the present invention is to increase the bonding strength between the resin portion and the metal portion used for the seat frame.
Another object of the present invention is to increase the mounting strength of the tubular member to the frame member.

According to the seat frame according to the present invention, the problem is a seat frame of a vehicle seat including a frame member, and the frame member is formed so as to cover a metal portion and an outer surface of the metal portion. It is composed of a resin portion and has side frames arranged on both sides in the sheet width direction and extending, and a plurality of the metal portions are provided side by side in a direction intersecting the extending direction of the side frame. , The resin portion extends in the extending direction of the side frame, and the resin portion covers the outer surface of each of the plurality of metal portions and extends in the extending direction of the side frame. possess a portion, a second extending portion connecting the extension extends in a direction crossing the direction out first extending the portions of the side frames, wherein the metal part has a skeleton of the frame member The tubular member is provided with a tubular member that supports the headrest, and the tubular member is sandwiched back and forth by the plurality of linear frames provided, and at least a part of the tubular member is inside. The problem is solved by inserting the resin portion into the resin portion and holding the resin portion by the resin portion .

According to the above configuration, the second extension portion of the resin portion is formed so as to connect a plurality of first extension portions, so that the area of the resin portion in the side frame is secured and the weight is suppressed. , The rigidity can be increased in a wide range by providing the regions of a plurality of metal portions in the directions intersecting the extending directions of the side frames.
Further, according to the above configuration, since the metal portion is a linear frame forming the skeleton of the frame member, the bending process is easy, so that the degree of freedom in the shape of the seat frame can be increased.
Further, according to the above configuration, since the tubular member is sandwiched between the linear frames, the strength of holding the tubular member can be increased.

Further, the metal portion may be provided in the front and rear in a U-shaped cross section, and the U -shaped open sides may be formed so as to face each other .
According to the above configuration, by making the metal portion U-shaped in cross section, the rigidity is increased, the contact area with the resin is increased, and the bonding is strengthened.

Further, a space may be formed in the central portion of the resin portion in the direction intersecting the extending direction of the side frame.
According to the above configuration, the weight can be reduced by forming a space in the central portion of the resin portion in the direction intersecting the side frame extending direction.

Further, it is preferable that a reinforcing portion is provided in the central portion of the resin portion in a direction intersecting the extending direction of the side frame , and the reinforcing portion has a honeycomb structure .
According to the above configuration, the rigidity of the side frame can be effectively increased by providing the reinforcing portion in the central portion in the direction intersecting the extending direction in the resin portion which is the portion having low rigidity.
Further, according to the above configuration, since the reinforcing portion has a honeycomb structure, it is possible to increase the rigidity while maintaining the light weight.

Further, the tubular member may be integrally connected to the linear frame by the resin portion.
According to the above configuration, since the tubular member is integrally connected to the linear frame by the resin portion, the number of parts can be reduced and the workability of manufacturing can be improved.

Also, the linear frame, Ri Oh a pipe, the pipe is arranged in the front and rear, unlike the diameter of the pipe disposed before and after the diameter of the pipe located on the seat front side, the sheet rear side It is preferably smaller than the diameter of the pipe located in .
According to the above configuration, since the linear frame is formed of a hollow pipe rather than a solid one, the weight of the seat frame can be reduced.
Further, according to the above configuration, the diameter of the pipe located on the front side of the seat is smaller than the diameter of the pipe located on the rear side of the seat, so that the proportion of the cushion pad on the front side of the seat can be increased. For this reason, the occupant's body can easily enter the seat at the time of a rear collision, and the cushioning property can be improved.

Further, the lower end side of the linear frame, preferably the mounting bracket for attaching the said resin portion and the linear frame is provided.
According to the above configuration, by providing the mounting bracket, the mounting strength between the linear frame and the resin portion can be increased, the rigidity of the frame member can be increased, and the linear shape can be further increased by the mounting bracket. Since the arrangement of the frame can be determined, the mounting workability can be improved.

Further, it is preferable that the resin portion is formed with a mounting portion for attaching a pressure receiving member that supports the occupant.
According to the above configuration, since the mounting portion for mounting the pressure receiving member is formed on the resin portion, it is not necessary to provide the mounting portion separately from the resin portion, so that the number of parts can be reduced and the seat frame can be manufactured. Workability can be improved.

Further, the mounting portion is integrally provided with the resin portion, and the tip of the mounting portion is formed to be larger than the other portions, so that the pressure receiving member engages with the tip. Good.
According to the above configuration, since the tip of the mounting portion formed in the resin portion is formed to be larger than the other portions, it can be easily confirmed by touch that the pressure receiving member is engaged with the tip of the mounting portion. It is possible to improve workability when assembling the pressure receiving member to the resin portion, and it is possible to prevent the pressure receiving member engaged with the mounting portion from being unexpectedly disengaged.

Further, a pressure receiving member integrally molded with the resin portion may be provided.
According to the above configuration, since the pressure receiving member is integrally molded with the resin portion, it is not necessary to prepare the pressure receiving member separately from the resin portion, so that the number of parts can be reduced and the pressure receiving member is the resin portion. The weight can be reduced by being molded with.

According to the vehicle seat according to the present invention, the subject includes the seat frame, a cushion member provided on the seat frame, and a skin material that covers the cushion member and is attached to the seat frame. It will be solved by.

According to the above configuration, by providing the above seat frame, it is possible to provide a vehicle seat that is lightweight and can secure rigidity.

According to the seat frame according to the present invention, it is possible to increase the rigidity in a wide range by the metal portion while suppressing the weight by the resin portion.
In addition, the contact area between the metal portion and the resin is increased, and the bonding strength can be increased.
In addition, the alignment of the metal part becomes easy, and the work efficiency at the time of assembly is improved.
In addition, it is possible to prevent the resin portion from peeling off from the metal portion.
In addition, the rigidity of the frame member can be effectively increased.
In addition, it is possible to easily form a highly rigid seat frame.
Further, the resin portion can be easily formed between the hollow portion of the metal portion and the outside, and the rigidity can be increased.
In addition, the degree of freedom in the shape of the seat frame can be increased.
In addition, the strength of holding the tubular member can be increased.
In addition, the seat frame can be made lighter.
In addition, the cushioning property can be enhanced.
Further, it is possible to prevent the resin from entering the pipe, to increase the welding strength between the pipe and other members, and to improve the workability of welding.
Further, the mounting strength between the linear frame and the resin portion can be increased, the rigidity of the frame member can be increased, and the mounting workability of the linear frame can be improved.
Further, the workability of assembling the pressure receiving member to the resin portion can be improved, and it is possible to prevent the pressure receiving member from being unexpectedly detached from the resin portion.
Further, it is possible to provide a lightweight vehicle seat while ensuring rigidity.
Further, the cooling time of the resin can be shortened to form the resin portion, and the production efficiency of the seat frame can be improved.
Further, the frame member can be molded while joining the resin portion and the metal portion by insert molding, which facilitates the manufacturing work.

It is a schematic perspective view of the vehicle seat which concerns on this embodiment. It is a schematic perspective view which shows the seat frame which concerns on this embodiment. It is a schematic perspective view which shows the side frame of the seat back frame which concerns on this embodiment. It is a schematic perspective view which shows the side frame excluding the resin part. It is a schematic perspective view which shows the side frame which concerns on the 1st modification excluding the resin part. It is a schematic perspective view which shows the side frame which concerns on the 2nd modification excluding the resin part. It is a schematic perspective view which shows the side frame which concerns on 3rd modification. It is a schematic perspective view which shows the side frame which concerns on 4th modification. It is a schematic perspective view which shows the side frame which concerns on 5th modification. It is a schematic perspective view which shows the side frame which concerns on 6th modification. It is a figure which shows the cross-sectional view of BB of FIG. 10A. It is a schematic perspective view which shows the side frame which concerns on 7th modification. It is a schematic perspective view which shows the side frame which concerns on 8th modification. It is a schematic perspective view which shows the side frame which concerns on 9th modification. It is a figure which shows the XIV-XIV cross section of the side frame shown in FIG. It is a figure which shows the cross section of the side frame which concerns on 10th modification. It is a figure which shows the cross section of the side frame which concerns on 11th modification. It is a figure which shows the cross section of the side frame which concerns on the 12th modification. It is a figure which shows the cross section of the side frame which concerns on 13th modification. It is a schematic perspective view which shows the side frame which concerns on the 14th modification excluding the resin part. It is a schematic diagram which shows the mold clamping process at the time of injection molding of a side frame. It is a schematic diagram which shows the injection process. It is a schematic diagram which shows the cooling process. It is a perspective view which shows the side frame of the seat cushion frame which concerns on 2nd Embodiment. It is a figure which shows the XXII-XXII cross section of FIG. 21 of the seat cushion frame which concerns on 2nd Embodiment. It is a schematic perspective view which shows the seat frame which concerns on 3rd Embodiment. It is a schematic perspective view which shows the seat back frame. It is sectional drawing which shows the XXV-XXV cross section of the headrest stay of FIG. It is a schematic front sectional view which shows the hook formed in the seat back frame and holds an S spring. It is sectional drawing of the hook which concerns on 15th modification, and is sectional drawing which shows the part corresponding to the sectional | cross section of XXVII-XXVII of FIG. It is a schematic cross-sectional view which shows the XXVIII-XXVIII cross section of the hook shown in FIG. It is a schematic perspective view which shows the seat cushion frame. It is a schematic perspective view which shows the seat cushion frame which concerns on the 16th modification. It is a perspective view which shows the upper pipe and the lower pipe which concerns on 17th modification.

Hereinafter, a vehicle seat, a seat frame, and a seat frame manufacturing method according to an embodiment of the present invention (hereinafter, the present embodiment) will be described with reference to the drawings.
The seat frame according to the present embodiment is composed of a resin portion and a metal portion in order to realize weight reduction while maintaining rigidity. The vehicle seat includes the seat frame, and the seat frame manufacturing method is a method for efficiently manufacturing the seat frame.

It should be noted that the embodiments described below are merely examples for facilitating the understanding of the present invention, and do not limit the present invention. That is, the shapes, dimensions, arrangements, and the like of the members described below can be changed and improved without departing from the gist of the present invention, and it goes without saying that the present invention includes equivalents thereof.
Further, in the following description, the vertical direction means the vertical direction of the sheet. The front-rear direction is a direction that coincides with the traveling direction of the vehicle, and corresponds to a direction that intersects the extending direction according to the present invention. The width direction is the direction along the width of the sheet.

<< First Embodiment >>
The vehicle seat S and the seat frame SF according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 4. Here, FIG. 1 is a schematic perspective view of the vehicle seat S, FIG. 2 is a schematic perspective view showing the seat frame SF, FIG. 3 is a schematic perspective view showing the side frame 22 of the seat back frame 1, and FIG. , Is a schematic perspective view showing a side frame 22 excluding the resin portion 22d.

As shown in FIG. 1, the vehicle seat S according to the present embodiment is composed of a seat back S1, a seat cushion S2, and a headrest S3. The seat back S1 and the seat cushion S2 have a structure in which cushion pads 1a and 2a as cushion members are arranged on the seat frame SF and covered with skin materials 1b and 2b, respectively.
The headrest S3 has a structure in which a cushion pad 3a as a cushion member is arranged on a core material (not shown) and covered with a skin material 3b.

As shown in FIGS. 1 and 2, the seat frame SF has a seat back frame 1 constituting the seat back S1 and a seat cushion frame 2 constituting the seat cushion S2 as main components.

The seat back frame 1 includes side frames 22 (details will be described later) extending in the vertical direction and arranged on both sides in the seat width direction, and side frames extending in the seat width direction and provided on both sides. An upper frame 21 fixed to the upper part of the 22 and a lower frame 35 extending in the seat width direction and fixed to the lower part of the side frames 22 provided on both sides are provided.

The upper frame 21 has a pipe shape and is formed in an inverted U shape when viewed from the front of the seat, and a pillar (not shown) of the headrest S3 is attached to the upper frame 21. The lower ends of the upper frame 21 on both sides in the seat width direction are fixed to the upper part of the side frame 22.

The lower frame 35 has a long plate shape and is fixed to the lower side frame portion 22a as a mounting bracket at the lower part of the side frame 22, and has a function of increasing the overall rigidity of the seat back frame 1.

As shown in FIGS. 3 and 4, the side frame 22 is one of a lower side frame portion 22a provided at the lower portion and a metal portion fixed to the front and rear of the upper portion of the lower side frame portion 22a and extending upward. The front pipe 22b and the rear pipe 22c are provided, and a resin portion 22d joined so as to cover the upper portion of the lower side frame portion 22a, the front pipe 22b, and the rear pipe 22c.
The seat back frame 1 or the seat cushion frame 2 or the side frame 22, or another seat back frame 3 or the seat cushion frame 4, 5 or the side frame 23, 24, 26, 27, 28, 29, 30, 31 described later. , 32, 33, 34, 40, 70, 71, 72, or the back frame member 3c or the front frames 4a, 4b, respectively, correspond to the frame members according to the present invention.

The lower side frame portion 22a, the front pipe 22b, and the rear pipe 22c shown in FIG. 4 are formed of a metal material such as an aluminum alloy, a magnesium alloy, or carbon steel.
Here, the metal in the present invention means a substance having a higher rigidity than a resin, and in the present embodiment, it is particularly made of an aluminum alloy, a magnesium alloy, a carbon steel, or the like.
Each of the front pipe 22b and the rear pipe 22c corresponds to the metal portion according to the present invention, the front pipe 22b is arranged on the front side of the side frame 22, and the rear pipe 22c is on the rear side of the side frame 22. It is arranged.
Hollow portions 22h are formed in each of the front pipe 22b and the rear pipe 22c along the extending direction.

On the other hand, the resin portion 22d is made of glass fiber reinforced plastic.
Here, the resin according to the present invention may be formed of a resin material other than glass fiber reinforced plastic, for example, carbon fiber reinforced plastic (CFRP) or carbon fiber-free plastic.

Specifically, the resin portion 22d includes a first extending portion 22e extending in the vertical direction and a second extending portion 22f connecting the first extending portion 22e provided in the front and rear of the side frame 22 in the front and rear. To be equipped.
The first extending portion 22e covers the outer surface of the upper portion of the lower side frame portion 22a and the outer surfaces excluding the upper surfaces of the front pipe 22b and the rear pipe 22c, respectively, and extends along the front pipe 22b and the rear pipe 22c. There is.
The second extension portion 22f extends in the front-rear direction and connects the first extension portions 22e provided in the front and rear of the side frame 22.

In this way, the resin portion 22d is continuously formed in the vertical direction and the front-rear direction so as to cover the entire upper portion of the lower side frame portion 22a and the upper surfaces of the front pipe 22b and the rear pipe 22c. That is, the resin portion 22d is formed so as to straddle between the front pipe 22b and the rear pipe 22c and the lower side frame portion 22a.
In this way, since the resin portion 22d is formed up to the upper portion of the lower side frame portion 22a, the front pipe 22b and the rear pipe 22c and the lower side frame portion 22a can be fixed without welding. Further, since the first extending portion 22e of the resin portion 22d extends along the extending direction of the front pipe 22b and the rear pipe 22c and the contact area between them is wide, the resin portion 22d has the front pipe 22b and the rear. It is hard to peel off from the pipe 22c.

The resin portion 22d is formed to be thicker than the front pipe 22b and the rear pipe 22c, and is attached so as to straddle the front pipe 22b and the rear pipe 22c in the front-rear direction.
In the resin portion 22d, the thickness of the portion formed between the front pipe 22b and the rear pipe 22c is thicker than the thickness of the portion covering the front pipe 22b or the rear pipe 22c.
Since the resin portion 22d is formed in this way, the portion of the metal material can be reduced, so that the weight can be reduced and the rigidity can be provided.

As described above, the side frame 22 is provided with a lower side frame portion 22a, a front pipe 22b and a rear pipe 22c formed of a metal material in a part and has rigidity in a wide range, while the resin portion 22d is provided in the other part. Weight reduction is realized by providing.

The resin portion 22d, the upper portion of the lower side frame portion 22a, the front pipe 22b, and the rear pipe 22c are integrally molded by insert molding.
Specifically, the lower side frame portion 22a, the front pipe 22b, and the rear pipe 22c are pre-installed in a mold having a predetermined shape, and the molten resin is poured into the resin portion 22d and the lower side frame portion. 22a, the front pipe 22b and the rear pipe 22c are joined. In this way, insert molding makes it possible to easily join these in a stable shape.

<First and second modifications>
In the side frame 22 according to the above embodiment, the front pipe 22b and the rear pipe 22c are formed so as to extend upward from the front and rear of the upper portion of the lower side frame portion 22a. The present invention is not limited to those.
The side frames 23 and 24 according to the first and second modified examples of other configurations will be described with reference to FIGS. 5 and 6.
Here, FIG. 5 is a schematic perspective view showing the side frame 23 according to the first modification excluding the resin portion 22d, and FIG. 6 is a schematic view showing the side frame 24 according to the second modification excluding the resin portion 22d. It is a perspective view.
In the following description, members having the same shape and function are designated by the same reference numerals to eliminate duplicate explanations and clarify the differences.

As shown in FIG. 5, the side frame 23 according to the first modification includes a U-shaped pipe 23b formed in a U shape when viewed from the side of the seat. The U-shaped pipe 23b corresponds to the metal portion according to the present invention, includes the front pipe 22b and the rear pipe 22c of the side frame 22 shown in FIG. 4, and has a shape in which the lower end portions thereof are connected to the front and rear.

In the side frame 23 having such a configuration, when the U-shaped pipe 23b is fixed to the upper portion of the lower side frame portion 22a, the U-shaped pipe 23b can be easily positioned.
That is, in the side frame 22 shown in FIG. 4, when the front pipe 22b and the rear pipe 22c are fixed to the lower side frame portion 22a, they must be positioned and joined.
On the other hand, in the side frame 23 shown in FIG. 5, by positioning only the U-shaped pipe 23b, the positions of the front and rear parts constituting the U-shaped pipe 23b can be defined, and the efficiency of the assembling work is improved.

The side frame 24 according to the second modification is not a pipe-shaped front pipe 22b and a rear pipe 22c, but a front having a cross-section bracket shape (cross-section U-shape) corresponding to one of the metal portions as shown in FIG. It includes a pillar 24b and a rear pillar 24c.
Specifically, the front pillar 24b and the rear pillar 24c correspond to the metal portions according to the present invention, respectively, and the open sides of the U-shape face each other and continuously upward from the front and rear of the upper portion of the lower side frame portion 22a. It is postponed.

As described above, in the side frame 24 provided with the front pillar 24b and the rear pillar 24c formed in a U shape, the rigidity is increased, the contact area with the resin portion 22d is widened, and the joint strength is increased. ..
Further, since the front pillar 24b and the rear pillar 24c are not pipe-shaped but plate-shaped, they can be integrally formed by press working without welding to the lower side frame portion 22a. Therefore, if the side frame 24 having the front pillar 24b and the rear pillar 24c is used, the molding becomes easy and the assembling work can be performed with high efficiency.
The front pillar 24b and the rear pillar 24c as metal portions need only have a large contact area with the resin portion 22d, and are not limited to a U-shaped cross section, but have a C-shaped cross section or a square-shaped cross section. May be good.

<Third modification example>
The resin portion 22d according to the above embodiment has been described as being formed continuously in the front-rear and up-down directions so as to cover the upper parts of the front pipe 22b, the rear pipe 22c, and the lower side frame portion 22a. The present invention is not limited to those.

For example, in the side frame 26 according to the third modification, as shown in FIG. 7, the resin portion 26d is characterized in that a space 26e is partially formed.
Specifically, the resin portion 26d of the side frame 26 is formed in the front-rear and vertical directions so as to cover the upper portions of the front pipe 22b, the rear pipe 22c, and the lower side frame portion 22a. It is the same as the part 22d.
The difference between the resin portion 26d and the resin portion 22d is the space 26e formed in the upper and lower central portions of the resin portion 26d, which penetrates the portion between the front pipe 22b and the rear pipe 22c in the sheet width direction. Is the point that forms.

By forming the space 26e in the side frame 26 in this way, it is possible to reduce the weight of the seat frame SF, and in the seat width direction, between the outside of the seat and the inside of the seat, an electronic device. It becomes possible to pass the wiring for operating the.

<Fourth modification>
In the side frame 26 according to the third modification, the space 26e is formed, so that the weight can be reduced, but the rigidity may be lower than the design condition.
Therefore, as shown in FIG. 8, the rib 27a may be formed so as to straddle the space 26e.

The side frame 27 according to the fourth modification provided with the rib 27a will be described with reference to FIG. Here, FIG. 8 is a schematic perspective view showing the side frame 27.
The rib 27a corresponds to the reinforcing portion according to the present invention, and extends vertically in a zigzag manner so as to alternately contact the front pipe 22b and the rear pipe 22c in the space 26e.

The rib 27a can be efficiently assembled by integrally molding the front pipe 22b, the rear pipe 22c, and the lower side frame portion 22a together with the resin portion 26d.
On the other hand, the frame body that fits in the rib 27a and the space 26e is inserted into the space 26e of the resin portion 26d already attached to the front pipe 22b, the rear pipe 22c, and the lower side frame portion 22a, welded to the resin portion 26d, and retrofitted. You may try to do it.
The rib 27a may be formed of only resin for weight reduction, but a metal material may be arranged as a core material inside. In this way, the rigidity can be increased.

<Fifth modification>
In the side frame 26 according to the fourth modification, the space 26e of the resin portion 26d is provided with ribs 27a for reinforcement, but the present invention is not limited to those having such a configuration.
For example, as shown in FIG. 9, a side frame 28 provided with a honeycomb portion 28a for reinforcement may be adopted in the space 26e.
Next, the side frame 28 according to the fifth modification will be described with reference to FIG. Here, FIG. 9 is a schematic perspective view showing the side frame 28.
The honeycomb portion 28a corresponds to the reinforcing portion according to the present invention, and is composed of a regular hexagonal hole portion 28b penetrating in the sheet width direction and a partition wall portion 28c formed so as to define the hole portion 28b.
The honeycomb portion 28a makes it possible to reduce the weight because the material is not required for the volume of the hole portion 28b, and the structure can maintain high rigidity against a load in the sheet width direction.

The honeycomb portion 28a can be efficiently assembled by integrally molding the front pipe 22b, the rear pipe 22c, and the lower side frame portion 22a together with the resin portion 26d.
On the other hand, the frame body that fits in the honeycomb portion 28a and the space 26e is inserted into the space 26e of the resin portion 26d already attached to the front pipe 22b, the rear pipe 22c, and the lower side frame portion 22a, and welded to the resin portion 26d. It may be retrofitted.

Further, the honeycomb portion 28a may be composed of a plurality of layers, and the positions of the hole portion 28b and the partition wall portion 28c may be shifted so that the honeycomb portions 28a are combined in layers in the sheet width direction. By doing so, the rigidity can be further increased.

Further, the honeycomb portion 28a may be formed only of resin for weight reduction, but a metal material may be arranged as a core material inside. In this way, the rigidity can be increased.

<6th modification>
In the side frame 26 according to the fifth modification, the space 26e of the resin portion 26d is provided with a honeycomb portion 28a having a hole portion 28b and a partition wall portion 28c continuous in the sheet width direction. The present invention is not limited to those relating to such configurations.
For example, as shown in FIGS. 10A and 10B, a side frame 29 having a honeycomb portion 29a having a hole portion 29b and a partition wall portion 29c continuous in the vertical direction in the space 26e may be adopted.
Next, the side frame 29 according to the sixth modification including the honeycomb portion 29a will be described with reference to FIGS. 10A and 10B. Here, FIG. 10A is a schematic perspective view showing the side frame 29 according to the sixth modification, and FIG. 10B is a view showing a cross-sectional view taken along the line BB of FIG. 10A.

The honeycomb portion 29a corresponds to the reinforcing portion according to the present invention, and is composed of a regular hexagonal hole portion 29b penetrating in the vertical direction and a partition wall portion 29c formed so as to define the hole portion 29b.
The honeycomb portion 29a makes it possible to reduce the weight because the material is not required for the volume integral of the hole portion 29b, and the structure can maintain high rigidity against a load in the vertical direction.

The frame body that fits into the honeycomb portion 29a and the space 26e is inserted into the space 26e of the resin portion 26d already attached to the front pipe 22b, the rear pipe 22c, and the lower side frame portion 22a, and welded to the resin portion 26d for retrofitting. And installed.
Further, the honeycomb portion 29a may be composed of a plurality of layers, and the positions of the hole portion 29b and the partition wall portion 29c may be further shifted so that the honeycomb portions 29a are combined in layers vertically. By doing so, the rigidity can be further increased.

Further, the honeycomb portion 28a may be formed only of resin for weight reduction, but a metal material may be arranged as a core material inside. In this way, the rigidity can be increased.

<7th modification>
In the side frame 28 or the side frame 29 according to the fifth modification and the sixth modification, it has been described that the honeycomb portion 28a or the honeycomb portion 29a is provided as the reinforcing member according to the present invention.
However, the present invention is not limited to such a configuration as long as a predetermined rigidity can be maintained while reducing the amount of material.
For example, instead of the honeycomb portion 28a having a regular hexagonal hole portion 28b shown in FIG. 9, a side frame 70 having a punch plate-shaped resin plate 70a having a circular hole portion 70b is adopted as shown in FIG. You may.

Specifically, the resin plate 70a of the side frame 70 corresponds to the reinforcing portion according to the present invention, and includes a plurality of circular hole portions 70b and a partition wall portion 70c formed so as to separate them.
In this way, high rigidity can be ensured by attaching the resin plate 70a to the space 26e of the resin portion 26d or integrally molding the resin plate 70a with the resin portion 26d.
Further, the holes are not limited to the regular hexagonal holes 28b and 29b and the circular holes 70b, and may be provided with holes having a triangular shape, a quadrangular shape, or the like.

<8th and 9th modifications>
Further, FIGS. 12 and 12 show the side frames 71 and 72 including the Miura fold (registered trademark) -shaped portion, which is a structure capable of reducing the weight while ensuring high rigidity without forming the holes 28b, 29b, 70b. This will be described with reference to 13.
Here, FIG. 12 is a schematic perspective view showing the side frame 71 according to the eighth modification, and FIG. 13 is a schematic perspective view showing the side frame 72 according to the ninth modification.
The side frame 71 has an uneven portion 71a as a reinforcing portion formed in a diamond cut shape by combining a plurality of triangles having a predetermined shape.
Further, the side frame 72 has an uneven portion 72a as a reinforcing portion formed by combining a plurality of parallelograms having a predetermined shape.
As described above, when the side frame 71 or the side frame 72 has the uneven portions 71a and 72a, the rigidity can be increased, and the thickness can be reduced to reduce the weight.

<10th to 13th modification>
Next, as a configuration example different from the side frame 22, the side frame 30 according to the tenth modification having the resin portion 30d joined to the front pipe 22b and the rear pipe 22c, and the eleventh modification not having the front pipe 22b. The side frame 31 according to the above, the side frame 32 according to the twelfth modification having no rear pipe 22c, and the side frame 34 according to the thirteenth modification having the front column 24b and not having the rear column 24c are shown in FIGS. This will be described with reference to FIG.
Here, FIG. 14 is a view showing an XIV-XIV cross section of the side frame 22 shown in FIG. 3, FIG. 15 is a view showing a cross section of the side frame 30, and FIG. 16 is a view showing a cross section of the side frame 31. 17 is a diagram showing a cross section of the side frame 32, and FIG. 18 is a diagram showing a cross section of the side frame 34.

As shown in FIG. 14, the resin portion 22d of the side frame 22 according to the above embodiment covers the peripheral surfaces of the front pipe 22b and the rear pipe 22c and is continuously formed in the front-rear direction. Since the resin portion 22d covers the peripheral surfaces of the front pipe 22b and the rear pipe 22c in this way, it can be firmly attached to these.
On the other hand, if the resin portion 22d has high strength and sufficient mounting strength with the front pipe 22b and the rear pipe 22c can be secured, the present invention is not limited to such a configuration, as shown in FIG. The resin portion 22d may join a part of the facing peripheral surfaces of the front pipe 22b and the rear pipe 22c to each other.
By doing so, the material can be reduced because the entire circumference of the front pipe 22b and the rear pipe 22c is not covered.

Further, as shown in FIGS. 16 and 17, the resin portions 31d and 32d extend to the positions where the front pipe 22b or the rear pipe 22c is provided without providing the front pipe 22b or the rear pipe 22c. The configuration may be adopted.
Specifically, the resin portion 31d is joined to the rear pipe 22c and extends forward from the rear pipe 22c to a position corresponding to the front pipe 22b.
Similarly, the resin portion 32d is joined to the front pipe 22b and extends rearward from the front pipe 22b to a position corresponding to the rear pipe 22c.
By doing so, it is possible to reduce the amount of metal material such as carbon steel used for one of the front pipe 22b or the rear pipe 22c, and it is possible to obtain a high effect of weight reduction.

Further, as in the side frame 34 shown in FIG. 18, the resin portion 34d extending rearward may be integrally molded on the front pillar 24b having a U-shaped cross section extending vertically from only the front side. ..
In particular, the rear pillar 34c is formed so as to have the same outer shape as the one side with the front pillar 24b even on the rear side without the metal front pillar 24b, so that the rigidity is enhanced.

In the above embodiment, the resin portions 22d, 26d, and 30d are integrally formed with the front pipe 22b, the rear pipe 22c or the front pillar 24b, and the lower side frame portion 22a for those that can be molded by the mold. When, 31d, 32d, and 34d are insert-molded, the work efficiency can be improved because joining and molding can be performed at the same time.

When the front pipe 22b and the rear pipe 22c are provided respectively, the front pipe 22b may be formed integrally with the upper frame 21, and the rear pipe 22c may be formed integrally with the lower frame 35. It may be formed by the combination of.
By doing so, the number of parts can be reduced and the assembly work can be facilitated.

<14th modification>
In the above description, the presence or absence of holes on the peripheral surfaces of the front pipe 22b and the rear pipe 22c and the U-shaped pipe 23b was not mentioned, but as illustrated in FIG. 19, the side frame 33 has the resin portion 22d. The introduction hole 33a to be introduced may be provided on the peripheral surface of the U-shaped pipe 23b. Here, FIG. 19 is a schematic perspective view showing a part of the side frame 33 according to the 14th modified example excluding the resin portions 22d, 26d, 30d, 31d, and 32d.

The U-shaped pipe 23b constituting the side frame 33 is formed with five introduction holes 33a at the top and bottom so as to be connected to the hollow portion 22h from each of the side surfaces facing each other in the front-rear direction.
Since the introduction holes 33a are formed in this way, when the resin portions 22d and 26d are injection-molded, the resin portions 22d and 26d are spread through the introduction holes 33a to the hollow portion 22h of the U-shaped pipe 23b. , The joint strength can be increased.
The target for forming the introduction hole 33a is not limited to the U-shaped pipe 23b, but may be formed in the front pipe 22b and the rear pipe 22c.

It should be noted that the molten resin that is the source of the resin portions 22d, 26d, 30d, 31d, and 32d is placed in the mold without forming such an introduction hole 33a in the U-shaped pipe 23b, the front pipe 22b, and the rear pipe 22c. After pouring, water or air may be passed through the hollow portion 22h to increase the cooling rate of the resin portions 22d and 26d.
The manufacturing method of the side frame 22 and the like will be described with reference to FIGS. 20A to 20C.
Here, FIG. 20A is a schematic view showing a mold clamping process when the side frame 22 is injection-molded, FIG. 20B is a schematic view showing an injection process, and FIG. 20C is a schematic view showing a cooling process.
First, as shown in FIG. 20A, a front pipe 22b, a rear pipe 22c, and a lower side frame portion 22a are arranged in a mold M installed in an injection molding machine (not shown) and molded.
Next, as shown in FIG. 20B, the molten resin is poured around the front pipe 22b, the rear pipe 22c, and the lower side frame portion 22a.
Then, as shown in FIG. 20C, water or air is poured into the hollow portions 22h of the front pipe 22b and the rear pipe 22c to cool the molten resin, and the resin portions 22d, 26d, 30d, 31d, and 32d are molded. To do.
According to such a process, it is possible to improve the production efficiency of the side frame 22 and the like.

<< Second Embodiment >>
In the above embodiment, an example in which the rigidity of the seat back S1 is maintained while being reduced in weight by the resin portions 22d, 26d, 30d, 31d, and 32d has been described, but the present invention is applied only to the seat back S1. Not limited.
For example, the side frame 40 constituting the seat cushion frame 2 may be adopted by changing the direction from the vertical direction to the front-rear direction with the same configuration.

Further, an example of joining the resin cover 41 to the side surface of the side frame 40 of the seat cushion frame 2 will be described below with reference to FIGS. 21 and 22.
Here, FIG. 21 is a perspective view showing the side frame 40 of the seat cushion frame 2 according to the second embodiment, and FIG. 22 shows a cross section of XXII-XXII of FIG. 21 of the seat cushion frame 2 according to the second embodiment. It is a figure.

The side frame 40 is a cover 41 formed of a beam material 40a composed of a lower edge 40b, an upper edge 40c, and an intermediate portion 40d between them and a resin material, and covers the outside of the beam material 40a in the sheet width direction. It is composed of and.

The beam member 40a corresponds to the metal portion according to the present invention, and the lower edge 40b and the upper edge 40c are bent inside the sheet to have a U-shaped cross section (bracket shape) and extend in the front-rear direction. doing. A cover 41 corresponding to the resin portion according to the present invention is arranged on the outside of the side frame 40 in the seat width direction.

The cover 41 corresponds to the resin portion according to the present invention, and a connecting portion 41b extending outward in the sheet width direction is formed on at least a part of the outer side surface of the intermediate portion 40d in the beam member 40a, and the connecting portion 41b is formed. On the tip side of the above, a lower edge 41a and an upper edge 41c are formed on the upper and lower sides.
According to the above configuration, the cover 41 can improve the appearance, and the cover 41 made of resin can be made lighter than the cover 41 made of a metal material.
Then, the production efficiency can be improved by providing a resin portion similar to the resin portion 22d so as to cover at least a part of the beam member 40a and forming the cover 41 integrally with the resin portion 22d.

<< Third Embodiment >>
The seat frame F1 according to the third embodiment as another embodiment of the present invention will be described with reference to FIGS. 23 to 29.
Here, FIG. 23 is a schematic perspective view showing the seat frame F1 according to the third embodiment, FIG. 24 is a schematic perspective view showing the seat back frame 3, and FIG. 25 is FIG. 23. XXV-XXV cross-sectional view of the headrest stay HS, FIG. 26 is a schematic front cross-sectional view showing a hook 50 formed on the seat back frame 3 and holding the S spring 36. 27 is a cross-sectional view of the hook 51 according to the fifteenth modification, and is a cross-sectional view showing a portion corresponding to the XXVII-XXVII cross section of FIG. 23. FIG. 28 is a cross-sectional view of the hook 76d shown in FIG. 23, XXVIII-XXVIII. A schematic cross-sectional view showing a cross section, FIG. 29 is a schematic perspective view showing the seat cushion frame 4.

The seat frame F1 has a seat back frame 3 constituting the seat back S1 and a seat cushion frame 4 constituting the seat cushion S2 as main components.

(About the seat cushion frame)
As shown in FIGS. 23 and 29, the seat cushion frame 4 is formed in a substantially square shape in a plan view, and is connected to the left and right connecting frames 75a and 75b connected to the seat back frame 3 and left and right. It includes a front frame 4a formed so as to straddle the frames 75a and 75b.

The connecting frames 75a and 75b are made of metal, have high rigidity, and form a side frame of the seat cushion frame 4.
The connecting frames 75a and 75b are formed with stepped portions so as to project rearward of the seat. This stepped portion functions as a fragile portion that deforms when the vehicle is subjected to an impact, and functions to reduce the load applied to the seated person.
As the fragile portion, instead of this step portion, a connecting shaft 75d extending in the seat width direction and having both ends joined to the connecting frame 75a and the connecting frame 75b may be formed.
Specifically, by joining both ends of the connecting shaft 75d and the connecting frames 75a and 75b, the rigidity of the joined portion is inevitably increased.
On the other hand, the rigidity around the joint is relatively low.
Therefore, the peripheral portion of the joint portion of the connecting frames 75a and 75b with the connecting shaft 75d can function as a fragile portion.

Further, on the front end side of each of the connecting frames 75a and 75b, at a portion connected to the connecting portion 76a of the pan frame 76, which will be described later, two engaging holes 75c are formed in the front-rear direction through the seat width direction. Has been done.
When the pan frame 76, which will be described later, is integrally molded, the molten resin of the pan frame 76 enters the engagement hole 75c, so that the contact area between the connecting portion 76a and the connecting frames 75a and 75b is increased, and the connecting strength is enhanced. It becomes.
The front frame 4a is composed of an upper pipe 48a and a lower pipe 48b as a skeleton, and a pan frame 76 having these inside and being insert-molded.
The upper pipe 48a and the lower pipe 48b correspond to one of the metal parts and the linear frame according to the present invention.
The pan frame 76 is made of carbon resin or glass fiber reinforced plastic, corresponds to one of the resin portions and the plate-shaped pan frame according to the present invention, and is a member constituting the front portion of the seat cushion frame 4. It is connected to the connecting frames 75a and 75b by connecting portions 76a at the rear ends on both sides in the width direction.
In addition, S springs 36 as pressure receiving members are erected on the connecting portions 76a on both sides of the connecting frames 75a and 75b and the pan frame 76 in the seat width direction. The mounting structure of the S spring 36 will be described later.

The upper pipe 48a is formed in a U-shape (U-shape) when viewed from above, with the end side connected to each of the front upper portions of the connecting frames 75a and 75b. Specifically, the upper pipe 48a extends forward from both ends and bends inward in the seat width direction to extend, then bends downward, and further bends inward in the seat width direction to form a central portion in the seat width direction. It is formed so as to extend linearly.
A part of the upper pipe 48a formed in this way bends and extends inward in the seat width direction at the upper part of the seat cushion frame 4, so that the rigidity is increased. Therefore, the amount of displacement of the seat cushion frame 4 can be kept small.

The lower pipe 48b is formed in the shape of a top view girder by connecting the end side to each of the lower front side of the connecting frames 75a and 75b. Specifically, the lower pipe 48b extends forward from both ends with a length longer than that of the upper pipe 48a, and then bends slightly upward and inward in the seat width direction, and the central portion in the seat width direction is the upper pipe 48a. It is formed so as to extend linearly at a position higher than the central portion in the seat width direction.

As described above, the upper pipe 48a is formed shorter in front of the lower pipe 48b, and the upper pipe 48a is located below the lower pipe 48b in the central portion in the seat width direction, so that the front collision of the vehicle The configuration makes it easy to avoid the occurrence of the submarine phenomenon at times.

A part of the upper pipe 48a behind the portion that bends inward in the seat width direction from the upper position and a part of the lower pipe 48b below the portion are supported by a connecting bracket (not shown).
This connecting bracket is rotatably attached to a link of a seat lifter (not shown).

The link of the seat lifter (not shown) and the connecting bracket (not shown) are rotatably attached by a resin bush (not shown) formed integrally with the link and a rotating shaft through which the bush is inserted.
In particular, the portion of the bush that abuts on the seating surface of the head of the rotating shaft is formed thicker than the other portions so that the center of rotation does not shift and the rigidity is increased. It has been raised.

The rear end sides of the upper pipe 48a and the lower pipe 48b on both sides in the seat width direction are joined to the upper and lower sides of the connecting frames 75a and 75b on both sides in the seat width direction on the inner side in the seat width direction by welding.
Further, the upper pipe 48a and the lower pipe 48b are formed at positions that substantially overlap in the vertical direction of the seat at the portions extending linearly from the connecting frame 75a and the connecting frame 75b on both sides in the seat width direction.
It is preferable that the rear end side of the upper pipe 48a and the lower pipe 48b is formed so as to be crushed in the radial direction. If the upper pipe 48a and the lower pipe 48b are formed in this way, a welding allowance is formed between the upper pipe 48a and the lower pipe 48b, and the joining strength can be increased.

In the above description, it has been described that only the pan frame 76 of the seat cushion frame 4 is formed of the resin material, but other parts may be formed of the resin material.
For example, the gear of the seat lifter (not shown) and the link connected to the gear may be composed of a metal portion and a resin portion into which the metal portion is inserted. By doing so, the weight can be reduced by using the resin portion instead of a part of the metal portion.

(About the seat back frame)
The seat back frame 3 functions as a frame by being integrally molded with the resin frame 38 as a front-view U-shaped resin portion with the open side as the lower side and the resin frame 38, and the metal portion according to the present invention. A front pipe 37a and a rear pipe 37b made of metal corresponding to one of the above are mainly provided.
Further, the seat back frame 3 includes a lower side frame portion 22a provided at both lower ends of the resin frame 38 on both sides in the seat width direction and joined to the front pipe 37a and the rear pipe 37b, and lower side frame portions on both sides in the seat width direction. It is equipped with a lower member 39 bridged over 22a.

Here, it is assumed that the resin frame 38, the front pipe 37a, the rear pipe 37b, the lower side frame portion 22a, and the lower member 39 constitute a back frame member 3c corresponding to the frame member according to the present invention.

The lower member 39 is composed of a plate-shaped metal member and a resin member that is insert-molded with the metal member inside, and the resin member on the surface is formed with ribs (not shown) for increasing rigidity. It is preferable that it is.

The front pipe 37a and the rear pipe 37b as the linear frame are formed in a U shape (inverted U shape) with the lower side as the open side in the front view, and the seat widths of the front pipe 37a and the rear pipe 37b. The portions on both sides of the direction are formed at positions that substantially overlap in the front-rear direction of the seat.
The upper portion of the front pipe 37a extends in the seat width direction, and as shown in FIGS. 23 to 25, the seat width direction in the rear pipe 37b so that the headrest stay HS described later can be fixed vertically and front and rear. It is formed at a position lower than the upper part extending to.

The lower ends of the front pipe 37a and the rear pipe 37b on both sides in the seat width direction are joined by welding to the front and rear on the inner surface side of the lower side frame portions 22a on both sides in the seat width direction.

Further, a part of the upper pipe 48a and the lower pipe 48b, or a part of the front pipe 37a and the rear pipe 37b may be connected.
By connecting in this way, the rigidity can be increased, so that the weight can be reduced by making it thinner.
In particular, by reducing the front-rear length of the seat back frame 3, it is possible to easily prevent the seated person from coming into contact with the vehicle seat S and receiving a load due to the impact at the time of a side collision.

Further, the upper pipe 48a and the lower pipe 48b are not limited to those formed separately, and a side frame including a U-shaped pipe 23b which is connected at the lower part and integrally formed in the front and rear as shown in FIG. As in 23, they may be connected on the rear end side.
With such a configuration, since the upper pipe 48a and the lower pipe 48b are integrally formed, the rigidity can be increased, the number of parts can be reduced, and the sheet manufacturing work can be made more efficient.

Further, in the present embodiment, the outer diameters of the upper pipe 48a, the lower pipe 48b, the front pipe 37a, and the rear pipe 37b are configured to have the same outer diameter in order to improve the parts manageability.
However, the present invention is not limited to this type of pipe, and pipes of different sizes may be used.
For example, the front pipe 37a may have an outer diameter smaller than the outer diameter of the rear pipe 37b, and the proportion of the cushion pad 1a may be increased on the front side to reduce the rigidity of the front side of the vehicle seat S. By doing so, when the vehicle is hit by a rear collision or a side collision, the body of the seated person can easily enter the vehicle seat S behind, and the load on the seated person due to the rear collision or the side collision can be alleviated. Can be done.
For the same reason, the upper pipe 48a has an outer diameter smaller than the outer diameter of the lower pipe 48b, and the proportion of the cushion pad 2a is increased on the upper side to reduce the rigidity of the front side of the vehicle seat S. May be good.

The resin frame 38 is formed of a resin material such as plastic containing glass fiber, and the front end portion covers the front pipe 37a and the rear end portion covers the rear pipe 37b so as to be continuous in a plate shape. It is formed. In addition to the plastic containing glass fiber, it may be formed of a plastic resin material such as CFRP, glass fiber, or plastic without carbon fiber.
Then, as shown in FIG. 25, two headrest stay HSs as vertically continuous square tubular members are formed so as to be sandwiched between the upper portion of the front pipe 37a and the upper portion of the rear pipe 37b. It is fixed. Further, the resin frame 38 is insert-molded including the front pipe 37a, the rear pipe 37b, and at least a part of the two headrest stays HS inside.

These two headrest stays HS are parts for attaching the headrest S3 by receiving the headrest pillars (not shown) of the headrest S3.
As described above, the headrest stay HS is attached and held with high strength by being sandwiched between the front pipe 37a and the rear pipe 37b. Then, when molding the resin frame 38, the headrest stay HS can be sandwiched between the front pipe 37a and the rear pipe 37b.

Specifically, the headrest stay HS, together with the front pipe 37a and the rear pipe 37b, is joined to the resin frame 38 by being insert-molded into the resin frame 38. With such a configuration, the number of parts can be reduced without the need for separate mounting members for mounting the headrest stay HS to the front pipe 37a and the rear pipe 37b, the welding process is not required, and manufacturing is easy. Become.

On the other hand, the headrest stay HS may be integrally molded with the resin frame 38 after the lower portion is welded to the front pipe 37a and the upper portion is welded to the rear pipe 37b.
By being welded in this way, the mounting rigidity of the headrest stay HS included in the seat back frame 3 can be further increased.

Further, on the upper side of the resin frame 38 and below the front pipe 37a, plate-shaped brackets 38a are formed so as to connect both ends on both sides of the resin frame 38 in the seat width direction.
The plate-shaped bracket 38a constitutes a part of the resin frame 38 and is continuously integrally molded, and is molded so that the weight 38b is arranged in the center.
The bracket 38a provided with the weight 38b functions as a dynamic damper, and it is possible to suppress the vibration of the seat back frame 3 and improve the riding comfort.

A hook 50 is formed inside the resin frame 38 in the seat width direction, and an S spring 36, which will be described later as shown in FIG. 26, is bridged to the hook 50. The S spring 36 provided in the seat back frame 3 is not shown in FIG. 23.

(About installation of S spring)
Next, the attachment of the S spring 36 will be described.
As described above, the vehicle seat S is provided with an S spring 36 that imparts cushioning properties to the seat back S1 and the seat cushion S2.
As shown in FIG. 23, the S spring 36 on the seat cushion S2 side is attached to the connecting portion 76a of the pan frame 76 constituting the seat cushion frame 4.
Specifically, both ends of the S spring 36 are attached to hooks 76d that are continuously integrally formed with the connecting portions 76a on both sides in the seat width direction.
As shown in FIG. 28, the hook 76d is formed so as to project inward in the seat width direction of the connecting portions 76a on both sides and extend in the front-rear direction, and is formed in the front-rear direction to hold the end portion of the S spring 36. It has a hole 76b.

As described above, since the S spring 36 can be held by the hook 76d integrally formed with the connecting portion 76a which is a part of the pan frame 76, it is not necessary to provide a separate mounting member for holding the S spring 36. Further, since it is not necessary to cut up the seat cushion frame 4 to hold the S spring 36, it is possible to improve the efficiency of the mounting work of the S spring 36.

Although the S spring 36 on the seat back S1 side is omitted in FIG. 23, it is attached to the inside of the lower side frame portion 22a and the resin frame 38 in the seat width direction, as shown in FIG. 27. There is.
Specifically, the S spring 36 below the seat back S1 is attached by a hook (not shown) formed by being cut up inward in the seat width direction in the lower side frame portion 22a.
In particular, when a hook (not shown) is provided at a position where the lower side frame portion 22a is normally covered by the resin frame 38, the lower side frame portion 22a is exposed from the resin frame 38 only at the portion where the hook is formed. It is preferable to form a resin frame 38 on the surface.

Further, as shown in FIG. 26, the S spring 36 above the seat back S1 is integrally molded continuously from both sides of the resin frame 38 in the seat width direction, and both ends are attached to hooks 50 protruding inward in the seat width direction. Has been done.
The hook 50 as a mounting portion has holding holes 50a formed in the seat width direction on both sides of the resin frame 38 in the seat width direction to hold the ends of the S spring 36, and the holding holes 50a have seat front directions and seat widths. It is provided with a protruding portion 50b formed so as to protrude inward in the direction.
In other words, the protruding portion 50b is formed together with the holding holes 50a so as to be cut up from both sides of the resin frame 38 in the sheet width direction inward in the sheet width direction.

As described above, since the S spring 36 can be held by the hook 50 integrally molded with the resin frame 38, it is not necessary to provide a separate mounting member for holding the S spring 36. Further, since it is not necessary to cut up the seat back frame 3 to hold the S spring 36, the efficiency of the mounting work of the S spring 36 can be improved.

<15th modification>
As shown in FIG. 27, the hook 51 as a mounting portion according to the fifteenth modification different from the hook 50 has a protruding portion 51b having a tip 51c formed larger than other portions.
The protruding portion 50b is formed with a tip 51c, which is a protrusion protruding outward in the sheet width direction from other portions, extending in the vertical direction at the edge of the holding hole 51a facing the penetrating portion.
By forming the tip 51c in this way, it is possible to prevent the S spring 36 assembled to the protrusion 51b through the holding hole 51a from being caught by the tip 51c and falling out of the hook 51.
Further, since the operator who attaches the S spring 36 to the hook 50 can feel the locking of the S spring 36 to the tip 51c of the protruding portion 51b by touch, he / she can recognize the locked state and quickly perform the assembling work. Is possible.
The hook 51 having such a configuration may be applied to the hook 76d of the seat cushion frame 4.

Further, the S spring 36 may be used as a resin spring and integrally molded with the resin frame 38. In this way, the total length of the S spring 36 can be shortened by giving the resin at the hooked portion of the S spring 36 a spring property.

<16th modification>
The seat cushion frame 5 according to the 16th modification will be described with reference to FIG. Note that FIG. 30 is a schematic perspective view showing the seat cushion frame 5 according to the 16th modification.
The seat cushion frame 5 has a shape different from that of the upper pipe 48a and the lower pipe 48b of the seat cushion frame 4 according to the embodiment of the third embodiment, and has a metal portion and an upper pipe 49a and a lower pipe as a linear frame. It includes 49b.

Specifically, the upper pipe 49a is formed in a U-shape in a top view by connecting the end side to each of the front upper parts of the connecting frames 75a and 75b, and extends forward from both ends and then has a height. The central portion in the width direction of the seat extends linearly and is formed at a substantially constant height without being significantly bent in the direction. Here, it is assumed that the pan frame 76, the upper pipe 49a, and the lower pipe 49b constitute a front frame 4b corresponding to the frame member according to the present invention.
The lower pipe 49b is formed in a U-shape when viewed from above by connecting the end side to each of the lower front side of the connecting frames 75a and 75b, and extends forward from both ends with a length shorter than that of the upper pipe 49a. After that, the central portion in the seat width direction extends linearly and is formed at a substantially constant height without being significantly bent in the height direction.

According to the seat cushion frame 5 according to the above modification, it is easy to prevent the upper pipe 49a and the lower pipe 49b from overlapping each other, and the pan frame 76 can be insert-molded after being combined in a predetermined shape, so that the manufacturing is easy. It becomes.
On the other hand, according to the seat cushion frame 4 according to the embodiment of the third embodiment shown in FIG. 29, the load from the seater is easily applied and the pan frame 76 is upward along the edge of the rear portion, which requires rigidity. The pipe 48a can be arranged, and the durability can be improved.

<17th modification>
Next, the upper pipe 55a and the lower pipe 55b according to the 17th modification will be described with reference to FIG. 31. FIG. 31 is a perspective view showing the upper pipe 55a and the lower pipe 55b according to the 17th modification.
The main shapes of the upper pipe 55a and the lower pipe 55b as one of the metal parts and the linear frame are the same as those of the upper pipe 48a and the lower pipe 48b shown in FIG. 29, except that the introduction holes 56a and 56b are crushed. This is the point where 57a and 57b are formed.

Specifically, in the upper pipe 55a and the lower pipe 55b, introduction holes 56a and 56b are provided at the front side of the connecting frames 75a and 75b shown in FIG. 23 and covered by the connecting portion 76a of the pan frame 76, respectively. Two are formed in the front and back.
The introduction holes 56a and 56b are holes for introducing resin into the space inside the upper pipe 55a and the lower pipe 55b when the pan frame 76 is insert-molded so as to cover the upper pipe 55a and the lower pipe 55b. is there.
By forming the introduction holes 56a and 56b in this way, it is possible to form the pan frame 76 and to connect the pan frame 76 with the upper pipe 55a and the lower pipe 55b.

In the upper pipe 55a and the lower pipe 55b, crushed 57a and 57b are formed on the front side of the introduction holes 56a and 56b, respectively.
The collapsed 57a and 57b are formed so as to close a part of the internal space of the upper pipe 55a and the lower pipe 55b.
Since the crushed 57a and 57b are formed in this way, the resin introduced into the upper pipe 55a and the lower pipe 55b from the introduction holes 56a and 56b can be limited to just before the crushed 57a and 57b. It will be possible.
That is, the crushed 57a and 57b limit the region in which the resin penetrates to the region on the introduction holes 56a and 56b side of the crushed 57a and 57b as the region necessary for connecting the pan frame 76 with the upper pipe 55a and the lower pipe 55b. can do. By limiting in this way, the resin is not filled on the front side (opposite side of the introduction holes 56a and 56b) of the upper pipe 55a and the lower pipe 55b from the crushed 57a and 57b. Therefore, the weight of the seat cushion frame 4 can be reduced.
Further, for example, when the connecting frames 75a and 75b are welded to the upper pipe 55a and the lower pipe 55b, the welding allowance can be secured by forming the crushed 57a and 57b, and the joining strength can be secured. Can be enhanced.

Further, the introduction holes 56a and 56b of the upper pipe 55a or the lower pipe 55b are not limited to the portion covered by the connecting portion 76a of the pan frame 76, and may be formed at any position. Then, the upper pipe 55a or the lower pipe so as to close the hollow space on both sides of the filling region so that the molten resin is filled inside the upper pipe 55a and the lower pipe 55b through the introduction holes 56a and 56b. It may have a structure in which a crush is formed in 55b.

As described above, the technique of filling the inside of the pipe with resin by the introduction holes 56a and 56b and the technique of limiting the resin filling area by the crushed 57a and 57b are not limited to those constituting the seat cushion frame 4. , Can be applied to the seat back frames 1 and 3.

In the above embodiment, the upper pipe 48a and the lower pipe 48b are formed at positions that substantially overlap in the vertical direction of the seat at the portions extending linearly from the connecting frame 75a and the connecting frame 75b on both sides in the seat width direction. I explained.
Similarly, it has been described that the front pipe 37a and the rear pipe 37b are formed at positions substantially overlapping in the front-rear direction of the seat at both sides in the seat width direction.
However, the present invention is not limited to such a form.

For example, the front pipe 37a of the seat back frame 3 may be arranged outside the rear pipe 37b in the seat width direction.
By doing so, it becomes easy for the seated person's body to enter at the time of the rear collision of the vehicle, and it is possible to prevent an excessive load from being applied to the seated person's body.

Further, the lower pipes 48b and 49b of the seat cushion frame 4 may be arranged outside the upper pipes 48a and 49a in the seat width direction.
By doing so, the lower pipes 48b and 49b and the upper pipes 48a and 49a are displaced in the left-right direction, so that when the pan frame 76 is insert-molded by superimposing the two pipes, the molten resin is easily distributed and the moldability is improved. improves.
Similarly, when the front pipe 37a and the rear pipe 37b are displaced in the left-right direction, the moldability can be similarly improved.

In the above embodiment, an example in which at least a part of the seat frame is formed from one or two metal pipes has been described, but the present invention is not limited to such a structure.
For example, for the purpose of increasing the rigidity, a plurality of metal pipes may be provided, and further, instead of the pipe, a solid material such as a wire, which is a linear material or a rod-shaped material, is adopted. You may try to do it. In particular, the linear one is easily deformed by bending, so that the degree of freedom in the shape of the seat frame can be increased.

Further, in the third embodiment, the seat back frame 3 has been described as having the front pipe 37a and the rear pipe 37b separately provided, but the seat back frame 3 is composed of one pipe to which these are connected. You may. Specifically, the front pipe 37a and the rear pipe 37b may be connected on the lower side frame portion 22a side.
Similarly, the seat cushion frame 4 has been described as having the upper pipes 48a and 49a and the lower pipes 48b and 49b separately provided, but each of these is composed of one pipe connected thereto. You may. Specifically, the upper pipes 48a and 49a and the lower pipes 48b and 49b may be connected on the connecting frame 75a side.

Further, these metal pipes may have a plurality of introduction holes for connecting the inside and the outside of the hollow.
According to such a configuration, when the resin frame or the pan frame is insert-molded so as to cover these pipes, the molten resin is poured into the hollow inside of these pipes through these introduction holes and integrated. Since it can be molded, the rigidity can be increased.

Further, in the above-described embodiment, the vehicle seat has been described, but the present invention is not limited to the vehicle seat. It can be applied to vehicle seats of ships, aircraft, industrial machines, etc. in order to improve fuel efficiency by reducing the weight while ensuring rigidity.

The above embodiment may also be described as the following appendix.
(Appendix 1)
A seat frame having an inverted U-shaped linear frame and forming a skeleton of the seat, including a tubular member supporting a headrest, and at least two linear frames are arranged in the front-rear direction. A seat frame characterized in that the tubular member is sandwiched and held in the front and rear of the linear frame.
According to the above configuration, since the tubular member is sandwiched and attached to the linear frame, it is possible to improve the rigidity of the tubular member.

(Appendix 2)
The seat frame according to Appendix 1, wherein the tubular member is welded and joined to the linear frame.
According to the above configuration, the rigidity of the tubular member can be improved by joining the tubular member to the linear frame by welding.

(Appendix 3)
The seat frame according to Appendix 1, wherein the tubular member is integrally formed with the linear frame and another member.
According to the above configuration, since the tubular member is integrally formed with the linear frame and other members, the number of parts can be reduced and workability can be improved.

(Appendix 4)
The seat frame according to any one of Supplementary note 1 to 3, wherein the linear frame is a pipe.
According to the above configuration, since the linear frame is a pipe, the weight can be reduced as compared with the solid one.

(Appendix 5)
The seat frame according to Appendix 4, wherein the pipes have the same diameter.
According to the above configuration, by making the diameters of the pipes the same, it is possible to improve the parts manageability and workability.

(Appendix 6)
The seat frame according to Appendix 4, wherein the diameter of the pipe differs between the front and rear pipes, and the diameter of the pipe on the front side of the seat is smaller than the diameter of the pipe on the rear side of the seat.
According to the above configuration, since the diameter of the pipe on the front side is small, the body of the seated person can easily enter at the time of the rear collision of the vehicle, and it is possible to suppress an excessive load from being applied to the body of the seated person.

(Appendix 7)
The seat frame according to any one of Supplementary note 4 to 6, wherein the end side of the pipe is formed by being crushed.
According to the above configuration, since the end side of the pipe is crushed, it becomes easy to secure a welding allowance and workability is improved.

(Appendix 8)
The description in Appendix 4, wherein a hole communicating the outside and the inside is formed in the pipe, the inside of the pipe is filled with molten resin, and a resin material is formed to the outside through the hole. Seat frame.
According to the above configuration, the rigidity improvement can be improved by filling the inside of the pipe with molten resin and forming the resin material to the outside of the pipe.

(Appendix 9)
The seat frame according to Appendix 1, wherein the linear frame is formed of at least two members.
According to the above configuration, workability can be improved by simplifying the shape.

(Appendix 10)
The seat frame according to Appendix 1, wherein the linear frame is formed of one member.
According to the above configuration, workability can be improved by simplifying the shape.

(Appendix 11)
The seat frame according to Appendix 1, wherein a mounting member for mounting with another member is provided on the end side of the linear frame.
According to the above configuration, workability can be improved and rigidity can be improved.

(Appendix 12)
The seat frame according to Appendix 1, wherein another member is provided so as to fill the space of the linear frame.
According to the above configuration, the rigidity can be improved by providing other members so as to fill the space of the linear frame.

(Appendix 13)
The seat frame according to Appendix 12, wherein the other member is provided with a mounting portion for attaching a pressure receiving member that supports the occupant.
According to the above configuration, since the mounting portion for mounting the pressure receiving member is provided on the other member, the number of parts can be reduced because it is not necessary to use the mounting portion separately, and the labor for mounting the mounting portion can be reduced. Since there is no workability, workability can be improved.

(Appendix 14)
The seat frame according to Appendix 13, wherein the mounting portion is integrally provided with another member, and the end portion side of the mounting portion is formed larger than the other portion.
According to the above configuration, workability can be improved by providing the mounting portion integrally with other members, and pressure receiving is received because the end side of the mounting portion is formed larger than the other parts. It is possible to prevent the member from coming off the mounting portion.

(Appendix 15)
The seat frame according to Appendix 14, wherein the pressure receiving member is integrally molded with the other member.
According to the above configuration, the weight can be reduced while reducing the number of parts.

(Appendix 16)
A seat frame forming a skeleton of a seat including a seat cushion frame, wherein the seat cushion frame is formed so as to connect a plurality of linear frames formed in a substantially U shape and the plurality of linear frames. A seat frame comprising a plate-shaped pan frame, wherein at least one of the plurality of linear frames is bent in the vertical direction.
According to the above configuration, at least one of the linear frames is bent up and down to increase the rigidity, and it is possible to suppress the bending of the seat frame at the time of a collision.

(Appendix 17)
The seat frame according to Appendix 16, wherein the linear frame bent in the vertical direction is a linear frame provided above the seat cushion.
According to the above configuration, since the upper linear frame is formed by bending, the rigidity can be increased and the bending of the seat frame can be suppressed.

(Appendix 18)
The seat frame according to Appendix 16, wherein the plurality of linear frames are provided at least at the front end and the rear end of the plate-shaped pan frame.
According to the above configuration, since the plurality of linear frames are provided at least at the front end and the rear end of the plate-shaped pan frame, the plate-shaped pan frame can be stably supported.

(Appendix 19)
The seat frame according to Appendix 16, wherein a mounting member for attaching the plurality of linear frames is provided.
According to the above configuration, the attachment workability of the plurality of linear frames can be improved by providing the attachment member for attaching the plurality of linear frames.

(Appendix 20)
The sheet frame according to Appendix 16, wherein the plate-shaped pan frame is made of carbon resin.
According to the above configuration, the plate-shaped pan frame is made of carbon resin, so that the weight can be reduced.

(Appendix 21)
The seat cushion frame has a height mechanism for adjusting the height of the seat, and the height mechanism is composed of a link structure composed of a plurality of links, and the plurality of links are surrounded by a resin. The seat frame according to Appendix 16, wherein the seat frame is characterized in that.
According to the above configuration, the weight can be reduced by reducing the proportion of metal as a whole because the link is covered with the resin.

HS headrest stay (cylindrical member)
M mold S vehicle seat (vehicle seat)
S1 Seat back S2 Seat cushion S3 Headrest SF, F1 Seat frame 1a, 2a, 3a Cushion pad (cushion member)
1b, 2b, 3b Skin material 1,3 Seat back frame (frame member)
2, 4, 5 Seat cushion frame (frame member)
3c back frame member (frame member)
4a, 4b front frame (frame member)
21 Upper frame 22 Side frame (frame member)
22a Lower side frame (mounting bracket)
22b Front pipe (metal part)
22c rear pipe (metal part)
22d Resin part 22e First extension part 22f Second extension part 22h Hollow part 23 Side frame (frame member)
23b U-shaped pipe (metal part)
24 Side frame (frame member)
24b Front pillar (metal part)
24c Rear pillar (metal part)
26 Side frame (frame member)
26d Resin part 26e Space 27 Side frame (frame member)
27a rib (reinforcement part)
28 Side frame (frame member)
28a Honeycomb part (reinforcing part)
28b Hole 28c Partition 29 Side frame (frame member)
29a Honeycomb part (reinforcing part)
29b Hole 29c Partition 30 Side frame (frame member)
30d Resin part 31 Side frame (frame member)
31d Resin part 32 Side frame (frame member)
32d resin part 33 side frame (frame member)
33a Introduction hole (hole)
34 Side frame (frame member)
34c Rear pillar 34d Resin part 35 Lower frame 36 S spring (pressure receiving member)
37a Front pipe (metal part, linear frame)
37b Rear pipe (metal part, linear frame)
38 Resin frame (resin part)
38a Bracket 38b Weight 39 Lower member 40 Side frame (frame member)
40a Beam material (metal part)
40b Lower edge 40c Upper edge 40d Middle part 41 Cover (resin part)
41a Lower edge 41b Connecting part 41c Upper edge 48a, 49a, 55a Upper pipe (metal part, linear frame)
48b, 49b, 55b Lower pipe (metal part, linear frame)
50,51 hook (mounting part)
50a, 51a holding holes (mounting part)
50b, 51b Protruding part 51c Tip 56a, 56b Introduction hole (hole)
57a, 57b Crushed 70 Side frame (frame member)
70a resin plate (reinforcing part)
70b Hole 70c Partition 71,72 Side frame (frame member)
71a, 72a Concavo-convex part (reinforcing part)
75a, 75b Connecting frame 75c Engagement hole 75d Connecting shaft 76 Pan frame (resin part, plate-shaped pan frame)
76a Connection part 76b Holding hole (mounting part)
76d hook

Claims (11)

A seat frame for a vehicle seat provided with a frame member.
The frame member is composed of a metal portion and a resin portion formed so as to cover the outer surface of the metal portion, and has side frames arranged on both sides in the sheet width direction and extending.
A plurality of the metal portions are provided side by side in a direction intersecting the extending direction of the side frame, and extend in the extending direction of the side frame.
The resin part is
A plurality of first extending portions that cover the outer surfaces of the plurality of metal portions and extend in the extending direction of the side frame.
Have a, a second extending portion connecting the plurality of first extending portion extending in a direction crossing the extending direction of the side frame,
The metal portion is a linear frame forming the skeleton of the frame member.
Equipped with a tubular member that supports the headrest
The tubular member is sandwiched in the front-rear direction by the linear frames provided in plurality, and the resin portion is insert-molded to include at least a part of the tubular member inside and is held by the resin portion. seat frame, characterized in that there. The seat frame according to claim 1, wherein the metal portions are provided in the front and rear in a U-shaped cross section, and the U-shaped open sides are formed so as to face each other . The seat frame according to claim 1 or 2 , wherein a space is formed in a central portion of the resin portion in a direction intersecting the extending direction of the side frame. A reinforcing portion is provided at the central portion of the resin portion in a direction intersecting the extending direction of the side frame .
The seat frame according to any one of claims 1 to 3, wherein the reinforcing portion has a honeycomb structure . The seat frame according to any one of claims 1 to 4, wherein the tubular member is integrally connected to the linear frame by the resin portion. The linear frame, Ri Oh pipe,
The pipes are arranged in the front and back,
The diameters of the pipes arranged in the front and back are different,
The seat frame according to any one of claims 1 to 5, wherein the diameter of the pipe located on the front side of the seat is smaller than the diameter of the pipe located on the rear side of the seat. The lower end portion side of the linear frame, the seat frame according to any one of claims 1 to 6, characterized in that mounting brackets for mounting the said linear frame and the resin portion is provided .. The seat frame according to any one of claims 1 to 7 , wherein the resin portion is formed with a mounting portion for attaching a pressure receiving member that supports the occupant. The mounting portion is integrally provided with the resin portion.
The tip of the mounting portion is formed larger than the other portions.
The seat frame according to claim 8 , wherein the pressure receiving member is engaged with the tip. The seat frame according to any one of claims 1 to 9 , further comprising a pressure receiving member integrally molded with the resin portion. The seat frame according to any one of claims 1 to 10 and
The cushion member provided on the seat frame and
A vehicle seat comprising a skin material that covers the cushion member and is attached to the seat frame.

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