JP2016153301A - Sheet frame, vehicle sheet, and method for manufacturing sheet frame - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a sheet frame, a vehicle sheet, and a method for manufacturing the sheet frame in which weight is reduced and rigidity can be secured.SOLUTION: A frame member includes a side frame 22 which comprises a front pipe 22b, a rear pipe 22c, and a resin part 22d formed so as to cover an outer surface of the front pipe 22b and a rear pipe 22c, and is arranged in both sides in the sheet width direction and extends. The front pipe 22b and the rear pipe 22c are arranged side by side in the back and forth direction, and extend in the extending direction of the side frame 22. The resin part 22d comprises two first extending parts 22e which cover each outer surface of the front pipe 22b and the rear pipe 22c and extend in the extending direction of the side frame 22, and a second extending part 22f which extends in the back and forth direction to connect the two first extending parts 22e.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a seat frame, a vehicle seat, and a seat frame manufacturing method, and more particularly, to a seat frame having a metal portion and a resin portion, a vehicle seat including the seat frame, and a seat frame manufacturing method.

Some vehicle seats in recent years have been made lighter by molding part or all of a seat back frame and a seat cushion frame with a resin material such as plastic in order to improve the fuel efficiency of the vehicle.
As described above, it is proposed that the seat frame is formed of a resin having a double wall structure as a vehicle seat frame capable of ensuring rigidity (described as strength in the same document) while realizing weight reduction. (See Patent Document 1).

  More specifically, in Patent Document 1, a seat frame including a seat cushion frame and a seat back frame is formed into a double wall structure by blow molding a resin, thereby ensuring rigidity while reducing weight. Have been described.

  Patent Document 2 discloses a seatback that is lightweight, has high strength, and is low in manufacturing cost by having a round pipe integrally embedded in the entire surface of the skin and a resin base material. Yes.

JP 2001-231654 A No. 7-16365

However, as in the vehicle seat frame described in Patent Document 1, it can be reduced in weight by being molded with resin. However, if the resin is only made into a double wall structure, it can withstand the impact applied to the seat frame in the event of an accident. It was difficult to ensure sufficient rigidity.
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 ensure rigidity against an impact such as a side collision. Further, since the resin base material is in contact only with the outer peripheral surface of the round pipe, the bond strength between the round pipe and the resin base material may not be sufficient.
And in the resin-made base material which comprises a seat back, only one round pipe is embed | buried over the perimeter (in frame shape). For this reason, when attaching the headrest stay as a cylindrical member to a round pipe, since this will be attached to the single side | surface side of a round pipe, attachment strength might not be enough.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a seat frame, a vehicle seat, and a seat frame manufacturing method that are lightweight and can ensure rigidity. is there.
Another object of the present invention is to increase the bonding strength between a resin part and a metal part used in a seat frame.
Another object of the present invention is to increase the attachment strength of the tubular member to the frame member.

  The subject is a seat frame of a vehicle seat including a frame member according to the seat frame according to the present invention, wherein the frame member is formed so as to cover a metal part and an outer surface of the metal part. A side frame that is disposed on both sides of the sheet width direction and extends, and a plurality of the metal portions are provided in a direction intersecting the extending direction of the side frame. A plurality of first extensions extending in the extending direction of the side frame, wherein 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. This is solved by including a portion and a second extending portion that extends in a direction crossing the extending direction of the side frame and connects the plurality of first extending portions.

  According to the above configuration, the second extending portion of the resin portion is formed so as to connect the plurality of first extending portions, and thus the area of the resin portion in the side frame is secured while being kept light. By providing a plurality of metal part regions in a direction intersecting with the extending direction of the side frames, the rigidity can be enhanced over a wide range.

Moreover, it is preferable that the said metal part is formed with a hollow part.
According to the said structure, when a metal part has a hollow part, it can be made lightweight by the part of a hollow part.

The metal part may be formed in a U-shaped cross section.
According to the said structure, while making a metal part U-shaped in cross section, rigidity increases and a contact area with resin becomes large and joining becomes strong.

The metal part is preferably formed in a U shape when viewed from the side of the sheet.
According to the above configuration, since the metal portion is formed in a U shape, it is easy to align the metal portions arranged on both sides in the direction intersecting the extending direction, and the work efficiency during assembly is improved. Rise.

Moreover, it is preferable that the site | part which covers the said metal part among the said resin parts is extended in the extension direction of the said metal part.
According to the said structure, it can suppress that a resin part peels from a metal part because the part which covers a metal part among the resin parts is extended in the extension direction of the said metal part.

Further, a space may be formed in a central portion of the resin portion in a direction intersecting with the extending direction of the side frame.
According to the said structure, it can reduce in weight because the space is formed in the center part of the direction which cross | intersects the side frame extension direction in a resin part.

Moreover, it is preferable that the reinforcement part is provided in the center part of the direction which cross | intersects the extension direction of the said side frame in the said resin part.
According to the said structure, the rigidity of a side frame can be effectively improved because the reinforcement part is provided in the center part of the direction which cross | intersects the extending direction in the resin part used as a low rigidity part.

Furthermore, it is preferable that the reinforcing part has a honeycomb structure.
According to the above configuration, since the reinforcing portion has a honeycomb structure, rigidity can be increased while maintaining a light weight.

Moreover, the hole which leads to the said hollow part inside and the exterior is formed in the said metal part, and the said resin part may be formed from the said hollow part to the said exterior through the said hole.
According to the above configuration, the hole leading to the hollow part of the metal part and the outside is formed in the metal part, and the resin part is formed up to the hollow part of the metal part, so that the rigidity can be increased, for example, By filling the hollow part of the metal part with the molten resin from the hole and performing injection molding, the resin part can be easily formed on the hollow part of the metal part and the outside.

The metal part may be a linear frame that is formed in an inverted U shape in a front view of the sheet and forms a skeleton of the frame member.
According to the said structure, since a metal part is a linear frame which comprises the frame | skeleton of a frame member, since bending is easy, the freedom degree of the shape of a seat frame can be raised.

In addition, it is preferable that a cylindrical member that supports the headrest is provided, and the cylindrical member is sandwiched and held by a plurality of the linear frames.
According to the said structure, the intensity | strength holding a cylindrical member can be raised because the cylindrical member is pinched | interposed into the linear frame.

The cylindrical member may be welded to the linear frame.
According to the said structure, the attachment strength of a cylindrical member can be raised more because the cylindrical member is welded to the linear frame.

Moreover, the said cylindrical member may be integrally connected with the said linear frame by the said resin part.
According to the said structure, a cylindrical member can be integrally connected with the linear frame by the resin part, a number of parts can be reduced and workability | operativity of manufacture can be improved.

The linear frame is preferably a pipe.
According to the above configuration, the seat frame can be reduced in weight because the linear frame is formed of a pipe that is not solid but hollow.

In addition, the pipes are arranged at the front and rear, the diameters of the pipes arranged at the front and rear are different, and 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 preferable.
According to the above configuration, the ratio of the cushion pad can be increased on the front side of the seat because 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. For this reason, a passenger | crew's body becomes easy to enter a seat | sheet at the time of a rear collision, and can improve cushioning properties.

Moreover, the end side of the pipe may be crushed.
According to the above configuration, since the end portion side of the pipe is crushed, the resin can be prevented from entering the pipe, and a welding allowance is ensured when welding with other members on the end portion side of the pipe. By being able to do so, the welding strength can be increased and the workability of welding can be improved.

Furthermore, it is preferable that a mounting bracket for attaching the linear frame and the resin portion is provided on the end side of the linear frame.
According to the above configuration, since the mounting bracket is provided, 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 bracket can be linear. Since the arrangement of the frame can be determined, the mounting workability can be improved.

Further, it is preferable that an attachment portion for attaching a pressure receiving member that supports an occupant is formed in the resin portion.
According to the above configuration, since the attachment portion for attaching the pressure receiving member to the resin portion is formed, it is not necessary to provide the attachment portion separately from the resin portion. Workability can be improved.

Further, the mounting portion is provided integrally with the resin portion, and a tip end of the mounting portion is formed larger than other portions, and the pressure receiving member is engaged with the tip end. Good.
According to the above configuration, since the tip of the mounting portion formed on the resin portion is formed 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. The workability at the time of assembling the pressure receiving member to the resin portion can be improved, and the pressure receiving member engaged with the attachment portion can be prevented from being unexpectedly detached.

Moreover, you may make it provide the pressure receiving member shape | molded integrally with the said resin part.
According to the above configuration, since the pressure receiving member is formed integrally with the resin portion, there is no need to prepare the pressure receiving member separately from the resin portion, so that the number of parts can be reduced. It can be reduced in weight 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. Is solved.

  According to the said structure, the vehicle seat which is lightweight and can ensure rigidity can be provided by providing the said seat frame.

  According to the seat frame manufacturing method of the present invention, the object is to provide a frame member having a metal part having a hollow part and a resin part joined to at least a part of the metal part and extending in a predetermined direction. A vehicle seat frame manufacturing method, comprising: an injection step of pouring molten resin around the metal portion; and a cooling step of pouring water or air into the hollow portion of the metal portion. This is solved by molding the resin part.

  According to the said structure, the resin cooling time can be shortened and the resin part can be shape | molded and the production efficiency of a seat frame can be improved.

The metal part is preferably formed integrally with the resin part by insert molding.
According to the said structure, since a frame member can be shape | molded, joining a resin part and a metal part by insert molding, a manufacture operation becomes easy.
In the present invention, the “insert” means a configuration in which a metal is arranged inside the resin, and is not limited to the one that is molded at the same time and is the arrangement, but is the one that is arranged by retrofitting. Is also included.

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 part and the resin is increased, and the bonding strength can be increased.
In addition, the metal part can be easily aligned, and the work efficiency during assembly is increased.
Moreover, it can suppress that a resin part peels from a metal part.
Further, the rigidity of the frame member can be effectively increased.
In addition, a highly rigid seat frame can be easily formed.
Moreover, the resin part can be easily formed in the hollow part of the metal part and the outside, and the rigidity can be increased.
Moreover, the freedom degree of the shape of a seat frame can be raised.
Moreover, the intensity | strength holding a cylindrical member can be raised.
Furthermore, the seat frame can be reduced in weight.
Moreover, cushioning properties can be enhanced.
Further, the resin can be prevented from entering the pipe, the welding strength between the pipe and another member can be increased, and the workability of welding can be improved.
Further, the attachment strength between the linear frame and the resin portion can be increased, the rigidity of the frame member can be increased, and the attachment workability of the linear frame can be improved.
In addition, the workability of assembling the pressure receiving member to the resin portion can be improved, and the pressure receiving member can be prevented from being unexpectedly detached from the resin portion.
Moreover, the vehicle seat reduced in weight can be provided, ensuring rigidity.
Furthermore, the resin portion can be formed by shortening the resin cooling time, and the production efficiency of the seat frame can be increased.
Furthermore, the frame member can be molded while joining the resin portion and the metal portion by insert molding, and the manufacturing operation becomes easy.

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 except the resin part. It is a schematic perspective view which shows the side frame which concerns on the 1st modification except a resin part. It is a schematic perspective view which shows the side frame which concerns on the 2nd modification except a resin part. It is a schematic perspective view which shows the side frame which concerns on a 3rd modification. It is a schematic perspective view which shows the side frame which concerns on a 4th modification. It is a schematic perspective view which shows the side frame which concerns on a 5th modification. It is a schematic perspective view which shows the side frame which concerns on a 6th modification. It is a figure which shows the BB cross-section arrow figure of FIG. 10A. It is a schematic perspective view which shows the side frame which concerns on a 7th modification. It is a schematic perspective view which shows the side frame which concerns on an 8th modification. It is a schematic perspective view which shows the side frame which concerns on a 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 a 10th modification. It is a figure which shows the cross section of the side frame which concerns on an 11th modification. It is a figure which shows the cross section of the side frame which concerns on a 12th modification. It is a figure which shows the cross section of the side frame which concerns on a 13th modification. It is a schematic perspective view which shows the side frame which concerns on the 14th modification except a resin part. It is a schematic diagram which shows the clamping process at the time of injection-molding a side frame. It is a schematic diagram which shows an injection process. It is a schematic diagram which shows a 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 typical perspective view showing a seat frame concerning a 3rd embodiment. It is a typical perspective view which shows a seat back frame. It is sectional drawing which shows the XXV-XXV cross section of the headrest stay of FIG. It is typical front sectional drawing which shows the hook formed in a seat back frame and hold | maintaining S spring. It is sectional drawing of the hook which concerns on a 15th modification, and is sectional drawing which shows the site | part corresponded to the XXVII-XXVII cross section of FIG. It is typical sectional drawing which shows the XXVIII-XXVIII cross section of the hook shown in FIG. It is a typical perspective view which shows a seat cushion frame. It is a typical perspective view showing the seat cushion frame concerning the 16th modification. It is a perspective view which shows the upper pipe and lower pipe which concern on a 17th modification.

Hereinafter, a vehicle seat, a seat frame, and a seat frame manufacturing method according to an embodiment of the present invention (hereinafter, this embodiment) will be described with reference to the drawings.
The seat frame according to the present embodiment includes a resin portion and a metal portion in order to achieve 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.

The embodiment described below is merely an example for facilitating the understanding of the present invention, and does not limit the present invention. That is, the shape, dimensions, arrangement, and the like of the members described below can be changed and improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof.
In the following description, the up and down direction refers to the up and down 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 a direction along the lateral width of the sheet.

<< First Embodiment >>
A vehicle seat S and a seat frame SF according to a first embodiment of the present invention will be described with reference to FIGS. 1 is a schematic perspective view of the vehicle seat S, FIG. 2 is a schematic perspective view of the seat frame SF, FIG. 3 is a schematic perspective view of the side frame 22 of the seat back frame 1, and FIG. It is a schematic perspective view which shows the side frame 22 except the resin part 22d.

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

  As shown in FIGS. 1 and 2, the seat frame SF includes 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) that extend in the vertical direction and are disposed on both sides of the seat width direction, and side frames that extend in the seat width direction and are provided on both sides. The upper frame 21 fixed to the upper part of 22 and the lower frame 35 extended in the sheet | seat width direction and being fixed to the lower part of the side frame 22 provided in both sides are provided.

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

  The lower frame 35 has a long plate shape and is fixed to a lower side frame portion 22a as a mounting bracket at the lower portion 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 a lower side frame portion 22 a provided in the lower portion and a metal portion that is fixed to the front and rear of the upper portion of the lower side frame portion 22 a and extends upward. A front pipe 22b and a rear pipe 22c, and an upper portion of the lower side frame portion 22a, and a resin portion 22d joined so as to cover 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 other seat back frames 3 or seat cushion frames 4, 5 or side frames 23, 24, 26, 27, 28, 29, 30, 31 described later. , 32, 33, 34, 40, 70, 71, 72, the back frame member 3c or the front frames 4a, 4b 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 made of a metal material such as an aluminum alloy, a magnesium alloy, or carbon steel.
Here, the metal in the present invention means a material made of a material having rigidity higher than that of the resin. In the present embodiment, the metal is made of an aluminum alloy, a magnesium alloy, carbon steel, or the like.
Each of the front pipe 22b and the rear pipe 22c corresponds to a metal portion according to the present invention. The front pipe 22b is disposed on the front side of the side frame 22, and the rear pipe 22c is disposed on the rear side of the side frame 22. It is arranged.
A hollow portion 22h is 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 formed 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, such as carbon fiber reinforced plastic (CFRP) or plastic without carbon fiber.

Specifically, the resin portion 22d includes a first extension portion 22e extending in the vertical direction, and a second extension portion 22f connecting the first extension portion 22e provided on the front and rear sides of the side frame 22 in the front-rear direction. Is provided.
The first extending portion 22e covers the outer surface except the upper surface of the lower side frame portion 22a and the upper surface of the front pipe 22b and the rear pipe 22c, and extends along the front pipe 22b and the rear pipe 22c. Yes.
The second extending portion 22f extends in the front-rear direction and connects the first extending portions 22e provided on the front and rear sides of the side frame 22.

In this way, the resin portion 22d is formed continuously in the vertical and front-rear direction so as to cover the entire upper portion of the lower side frame portion 22a and the upper surface 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.
Thus, since the resin part 22d is formed to the upper part of the lower side frame part 22a, the front pipe 22b, the rear pipe 22c, and the lower side frame part 22a can be fixed without welding. Furthermore, 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 large, the resin portion 22d is connected to the front pipe 22b and the rear pipe 22b. It is difficult to peel off from the pipe 22c.

The resin portion 22d is formed 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 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.
By forming the resin portion 22d in this way, the metal material portion can be reduced, so that the weight can be reduced and rigidity can be provided.

  As described above, the side frame 22 includes the lower side frame portion 22a, the front pipe 22b, and the rear pipe 22c formed from a metal material in part and has rigidity in a wide range, while the resin portion 22d is provided in the other part. The weight saving is realized by having.

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 formed by insert molding.
Specifically, the molten resin is poured in a state where the lower side frame portion 22a, the front pipe 22b, and the rear pipe 22c are set in advance in a mold having a predetermined shape, so that 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, it is possible to easily join them with a stable shape by insert molding.

<First and second modified examples>
In the side frame 22 according to the embodiment, the front pipe 22b and the rear pipe 22c are formed 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 this.
Side frames 23 and 24 according to 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 denoted by the same reference numerals to eliminate redundant description and clarify the difference.

  As shown in FIG. 5, the side frame 23 according to the first modification includes a U-shaped pipe 23 b formed in a U shape in a side view from the side of the seat. The U-shaped pipe 23b corresponds to a metal portion according to the present invention, and includes a front pipe 22b and a rear pipe 22c of the side frame 22 shown in FIG.

In the side frame 23 having such a configuration, the U-shaped pipe 23b can be easily positioned when the U-shaped pipe 23b is fixed to the upper portion of the lower side frame portion 22a.
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, each 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 portions constituting the U-shaped pipe 23b can be defined, and the efficiency of the assembling work is increased.

The side frame 24 according to the second modified example is not a pipe-shaped front pipe 22b and a rear pipe 22c, but a front section of a cross-section bracket shape (a cross-section U-shape) corresponding to one of the metal portions, as shown in FIG. A column 24b and a rear column 24c are provided.
Specifically, each of the front pillar 24b and the rear pillar 24c corresponds to a metal portion according to the present invention, 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 extended.

As described above, in the side frame 24 including 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 increased, and the bonding strength is increased. .
Furthermore, since the front pillar 24b and the rear pillar 24c are not pipe-shaped but plate-shaped, they can be integrally formed by pressing without welding to the lower side frame portion 22a. For this reason, 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.
Note that the front pillar 24b and the rear pillar 24c as the metal part are not limited to a U-shaped cross section, as long as the contact area with the resin part 22d is widened, and have a C-shaped section or a B-shaped section. Also good.

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

For example, in the side frame 26 according to the third modified example, as shown in FIG. 7, the resin portion 26 d has a space 26 e in a part thereof.
Specifically, the resin part 26d of the side frame 26 is formed in the front and rear and upper and lower sides so as to cover the upper part of the front pipe 22b, the rear pipe 22c, and the lower side frame part 22a. It is the same as the part 22d.
The resin portion 26d differs from the resin portion 22d in the upper and lower central portions of the resin portion 26d, and is a space 26e formed through the portion between the front pipe 22b and the rear pipe 22c in the sheet width direction. Is the point that forms.

  Thus, by forming the space 26e in the side frame 26, it is possible to reduce the weight of the seat frame SF, and in the seat width direction, an electronic device between the seat outer side and the seat inner side. It is possible to pass the wiring for operating.

<Fourth Modification>
In the side frame 26 according to the third modification, the space 26e is formed, so that weight reduction can be realized, but it is conceivable that the rigidity is lower than the design condition.
For this reason, as shown in FIG. 8, the ribs 27a may be formed across the space 26e.

A side frame 27 according to a fourth modification including the ribs 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 a reinforcing portion according to the present invention, and extends in a zigzag manner so as to alternately contact the front pipe 22b and the rear pipe 22c in the space 26e.

If the rib 27a is integrally formed with the front pipe 22b, the rear pipe 22c, and the lower side frame part 22a together with the resin part 26d, the rib 27a can be assembled efficiently.
On the other hand, the frame body that fits into the rib 27a and the space 26e is used as a unit, and is inserted into the space 26e of the resin portion 26d that is already attached to the front pipe 22b, the rear pipe 22c, and the lower side frame portion 22a, and is welded to the resin portion 26d and attached later. You may make it do.
And although the rib 27a may be formed only with resin for weight reduction, you may make it arrange | position a metal material as a core material inside. In this way, the rigidity can be increased.

<Fifth Modification>
In the side frame 26 according to the fourth modified example, the space 26e of the resin portion 26d is provided with the ribs 27a for reinforcement. However, the present invention is not limited to such a configuration.
For example, as shown in FIG. 9, a side frame 28 including a honeycomb portion 28a for reinforcement may be employed in a space 26e.
Next, a side frame 28 according to a 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 a reinforcing portion according to the present invention, and includes a regular hexagonal hole portion 28b penetrating in the sheet width direction and a partition wall portion 28c formed so as to delimit it.
The honeycomb portion 28a can reduce the weight because no material is required for the volume of the hole portion 28b, and the structure can maintain high rigidity with respect to the load in the sheet width direction.

The honeycomb portion 28a can be assembled efficiently if it is formed integrally with 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 used as a unit, and 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 is welded to the resin portion 26d. It may be retrofitted.

  Furthermore, 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 to be combined in layers in the sheet width direction. By doing so, the rigidity can be further increased.

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

<Sixth Modification>
In the side frame 26 according to the fifth modification, the space 26e of the resin portion 26d includes the honeycomb portion 28a having the hole portion 28b and the partition wall portion 28c that are continuous in the sheet width direction. The present invention is not limited to such a configuration.
For example, as shown in FIGS. 10A and 10B, a side frame 29 including a honeycomb portion 29a having a hole portion 29b and a partition wall portion 29c continuous in the vertical direction in a space 26e may be employed.
Next, a side frame 29 according to a 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 a side frame 29 according to a sixth modification, and FIG. 10B is a view showing a cross-sectional view taken along the line BB in FIG. 10A.

The honeycomb portion 29a corresponds to a reinforcing portion according to the present invention, and includes a regular hexagonal hole portion 29b penetrating in the vertical direction and a partition wall portion 29c formed so as to delimit it.
The honeycomb portion 29a can reduce the weight because no material is required for the volume of the hole portion 29b, and the structure can maintain high rigidity with respect to the 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 that is already attached to the front pipe 22b, the rear pipe 22c, and the lower side frame portion 22a, and is welded to the resin portion 26d to be retrofitted. Attached.
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 to be combined in a layered manner in the vertical direction. By doing in this way, rigidity can be made higher.

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

<Seventh Modification>
The side frame 28 or the side frame 29 according to the fifth modification and the sixth modification has been described as including the honeycomb portion 28a or the honeycomb portion 29a as the reinforcing member according to the present invention.
However, the present invention is not limited to such a configuration as long as the predetermined rigidity can be maintained while reducing the material.
For example, instead of the honeycomb portion 28a having the regular hexagonal hole portion 28b shown in FIG. 9, a side frame 70 having a punch plate-like resin plate 70a having a circular hole portion 70b as shown in FIG. 11 is adopted. May be.

Specifically, the resin plate 70a of the side frame 70 corresponds to a 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.
If it does in this way, high rigidity is securable by attaching the resin board 70a to the space 26e of the resin part 26d, or integrally forming with the resin part 26d.
Further, the holes are not limited to the regular hexagonal holes 28b and 29b and the circular hole 70b, but may be provided with holes having a triangular shape, a square shape, or other shapes.

<Eighth and ninth modifications>
Further, side frames 71 and 72 including Miura-folded (registered trademark) -like portions that are configured to be lightweight while ensuring high rigidity without forming holes 28b, 29b, and 70b are shown in FIGS. Explanation will be made with reference to FIG.
Here, FIG. 12 is a schematic perspective view showing a side frame 71 according to an eighth modification, and FIG. 13 is a schematic perspective view showing a side frame 72 according to a 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 of a predetermined shape.
As described above, since 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 by reducing the thickness.

<10th to 13th modifications>
Next, as a configuration example different from the side frame 22, the side frame 30 according to the tenth modified example having the resin portion 30d joined to the front pipe 22b and the rear pipe 22c, and the eleventh modified example not having the front pipe 22b. FIG. 14 to FIG. This will be described with reference to FIG.
14 is a diagram showing a cross section of the side frame 22 shown in FIG. 3, FIG. 15 is a diagram showing a cross section of the side frame 30, and FIG. 16 is a diagram showing a cross section of the side frame 31. 17 is a view showing a cross section of the side frame 32, and FIG. 18 is a view showing a cross section of the side frame 34.

As shown in FIG. 14, the resin part 22d of the side frame 22 according to the above embodiment is formed continuously in the front-rear direction so as to cover the peripheral surfaces of the front pipe 22b and the rear pipe 22c. Thus, since the resin part 22d has covered the surrounding surface of the front pipe 22b and the rear pipe 22c, it will be firmly attached to these.
On the other hand, as long as the resin portion 22d has high strength and can sufficiently secure the attachment strength with the front pipe 22b and the rear pipe 22c, it is not limited to such a configuration, as shown in FIG. The resin portions 22d may join a part of the opposed peripheral surfaces of the front pipe 22b and the rear pipe 22c.
In this way, the material can be reduced by the amount not covering the entire circumference of the front pipe 22b and the rear pipe 22c.

Further, as shown in FIGS. 16 and 17, the resin portions 31d and 32d extend to the position where the front pipe 22b or the rear pipe 22c is provided without providing the front pipe 22b or the rear pipe 22c. A 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.
If it does in this way, metal materials, such as carbon steel used for one of the front pipe 22b or the back pipe 22c, can be reduced, and the high effect of weight reduction will be acquired.

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

  In the above-described embodiment, the resin parts 22d, 26d, and 30d are formed so as to be integrated with the front pipe 22b, the rear pipe 22c or the front pillar 24b, and the lower side frame part 22a. , 31d, 32d, and 34d can be joined and molded at the same time, so that the working efficiency is improved.

Further, when the front pipe 22b and the rear pipe 22c are respectively provided, 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. You may make it form by the combination of these.
In this way, the number of parts can be reduced and the assembling work can be facilitated.

<14th modification>
In the above description, the presence or absence of holes in the peripheral surface of the front pipe 22b, the rear pipe 22c, and the U-shaped pipe 23b is not mentioned, but as illustrated in FIG. 19, the side frame 33 is replaced with 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 fourteenth modification excluding the resin portions 22d, 26d, 30d, 31d, and 32d.

In the U-shaped pipe 23b constituting the side frame 33, five introduction holes 33a are formed at the top and bottom so as to be connected to the hollow portion 22h from each of the side surfaces on the front and rear sides.
By forming the introduction hole 33a in this way, when the resin parts 22d and 26d are injection-molded, the resin parts 22d and 26d pass through the introduction hole 33a to the hollow part 22h of the U-shaped pipe 23b. The bonding 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.

In addition, without forming such an introduction hole 33a in the U-shaped pipe 23b, the front pipe 22b, and the rear pipe 22c, the molten resin that is the base of the resin portions 22d, 26d, 30d, 31d, and 32d is placed in the mold. 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.
A method for manufacturing the side frame 22 and the like will be described with reference to FIGS. 20A to 20C.
Here, FIG. 20A is a schematic diagram illustrating a mold clamping process when the side frame 22 is injection molded, FIG. 20B is a schematic diagram illustrating an injection process, and FIG. 20C is a schematic diagram illustrating 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 clamped.
Next, as shown in FIG. 20B, 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 portion 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, the production efficiency of the side frame 22 and the like can be increased.

<< Second Embodiment >>
In the above-described embodiment, the example in which the resin portions 22d, 26d, 30d, 31d, and 32d maintain the rigidity while reducing the weight of the seat back S1 has been described. However, the present invention is applied only to the seat back S1. It is 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 in which a resin cover 41 is joined 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 XXII-XXII section of FIG. 21 of the seat cushion frame 2 according to the second embodiment. FIG.

  The side frame 40 is made of a resin material and a beam member 40a composed of a lower edge 40b, an upper edge 40c, and an intermediate portion 40d therebetween, and a cover 41 that covers the outer side of the beam member 40a in the seat width direction. It consists of.

  The beam member 40a corresponds to a metal part according to the present invention, and a lower edge 40b and an upper edge 40c are bent inward of 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 disposed outside the side frame 40 in the seat width direction.

The cover 41 corresponds to a 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. A lower edge 41a and an upper edge 41c are formed on the top and bottom sides of the upper and lower sides.
According to the said structure, an external appearance can be made favorable with the cover 41, and it can reduce in weight rather than forming with a metal material by forming the cover 41 from resin.
Then, by providing a resin part similar to the resin part 22d so as to cover at least a part of the beam member 40a and forming the cover 41 integrally therewith, the manufacturing efficiency can be improved.

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

  The seat frame F1 includes 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 plan view, and the left and right connection frames 75a and 75b connected to the seat back frame 3 and the left and right connection frames And a front frame 4a formed across the frames 75a and 75b.

The connection frames 75a and 75b are made of metal, have high rigidity, and constitute a side frame of the seat cushion frame 4.
The connection frames 75a and 75b are formed with step portions so as to protrude rearward of the seat. The step portion functions as a fragile portion that deforms when an impact is applied to the vehicle, and functions to reduce the load applied to the seated person.
Instead of the stepped portion, the weakened portion may be constituted by 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.
Specifically, the rigidity of the joint is inevitably increased by joining both ends of the coupling shaft 75d and the coupling frames 75a and 75b.
On the other hand, the rigidity around the joint is relatively low.
For this reason, the peripheral part of the junction part with the connection shaft 75d in connection frame 75a, 75b can be functioned as a weak part.

Further, two engaging holes 75c are formed in the front end side of each of the connecting frames 75a and 75b and connected to a connecting portion 76a of a pan frame 76, which will be described later, penetrating in the seat width direction. Has been.
When the pan frame 76 described later is integrally formed, the molten resin of the pan frame 76 enters the engagement holes 75c, so that the contact area between the connection portion 76a and the connection frames 75a and 75b is increased, and the connection strength is increased. It becomes.
The front frame 4a is composed of an upper pipe 48a and a lower pipe 48b as a framework, and a pan frame 76 that is provided with these inside and is insert-molded.
The upper pipe 48a and the lower pipe 48b correspond to one metal part and a 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 portion and the plate-like pan frame according to the present invention, and is a member constituting the front portion of the seat cushion frame 4. The connecting frames 75a and 75b are connected to each other 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 provided in the sheet width direction at connection portions 76a on both sides of the connection frames 75a and 75b and the pan frame 76 in the sheet width direction. The mounting structure of the S spring 36 will be described later.

The upper pipe 48a is formed in a U-shape when viewed from above, with the end side connected to each of the upper front portions of the connecting frames 75a and 75b. Specifically, the upper pipe 48a extends forward from both end portions, bends and extends inward in the sheet width direction, then bends downward, and further bends inward in the sheet width direction so that the center portion in the sheet width direction is It is formed to extend linearly.
A part of the upper pipe 48a formed in this manner is bent and extended inward in the seat width direction at the upper portion of the seat cushion frame 4, thereby increasing the rigidity. For this reason, the amount of displacement of the seat cushion frame 4 can be kept small.

  The lower pipe 48b is formed in a trapezoidal shape as viewed from above by connecting the end side to the front lower part of each 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 slightly bends upward and inward in the sheet width direction, so that the central portion in the sheet 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 sheet width direction.

  Thus, the upper pipe 48a is formed shorter forward than the lower pipe 48b, and the upper pipe 48a is positioned below the lower pipe 48b at the center in the seat width direction. It is easy to avoid the occurrence of submarine phenomenon.

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

A link of a sheet lifter (not shown) and a connection bracket (not shown) are rotatably attached by a resin-made bush (not shown) formed integrally with the link and a turning shaft through which the bush is inserted.
In particular, the portion of the bush that contacts the seating surface of the head of the rotation shaft is formed thicker than the other portions, so that the displacement of the rotation center does not occur, and the rigidity is high. Has been enhanced.

Respective rear end portions on both sides in the sheet width direction of the upper pipe 48a and the lower pipe 48b are joined by welding on the upper and lower sides in the sheet width direction on the connection frames 75a and 75b on both sides in the sheet width direction.
Further, in the portions extending linearly from the connecting frame 75a and the connecting frame 75b on both sides of the upper pipe 48a and the lower pipe 48b in the seat width direction, the upper pipe 48a and the lower pipe 48b are formed at positions substantially overlapping in the seat vertical direction.
It is preferable that the rear end portions of the upper pipe 48a and the lower pipe 48b are formed so as to be crushed in the radial direction. Thus, if the upper pipe 48a and the lower pipe 48b are formed, a welding allowance will be formed between connection frames 75a and 75b, and joint strength can be raised.

In the above description, it has been described that only the pan frame 76 of the seat cushion frame 4 is formed of a resin material, but other components may be formed of a resin material.
For example, a gear of a sheet lifter (not shown) and a link connected to the gear may be constituted by a metal part and a resin part in which the metal part is inserted. If it does in this way, it can reduce in weight by using a resin part instead of a part of metal part.

(About the seat back frame)
The seat back frame 3 has a resin frame 38 as a U-shaped resin portion in front view with the open side as a lower side, and is integrally formed with the resin frame 38 to function as a skeleton, and the metal portion according to the present invention A metal front pipe 37a and a rear pipe 37b corresponding to the above are mainly provided.
Further, the seat back frame 3 includes a lower side frame portion 22a provided at the lower ends of both sides of the resin frame 38 in the seat width direction and joined to the front pipe 37a and the rear pipe 37b, and a lower side frame portion on both sides of the seat width direction. And a lower member 39 spanning 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-like metal member and a resin member that is insert-molded with the metal member inside, and a rib (not shown) is formed on the resin member on the surface to increase rigidity. Preferably.

The front pipe 37a and the rear pipe 37b as the linear frames are formed in a U-shape (reverse U-shape) with the lower side open as viewed from the front, and the seat width of the front pipe 37a and the rear pipe 37b The portions on both sides in the direction are formed at substantially overlapping positions in the longitudinal 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 top and bottom and front and rear of a headrest stay HS described later can be fixed in the seat width direction of the rear pipe 37b. It is formed at a position lower than the upper part extending to the top.

  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 back of the inner side of the lower side frame portion 22a on both sides in the seat width direction.

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

Further, the upper pipe 48a and the lower pipe 48b are not limited to those configured separately, and a side frame including a U-shaped pipe 23b that is connected at the lower part and integrally formed at the front and rear as shown in FIG. Like 23, you may be connected in the rear-end part side.
With such a configuration, since the upper pipe 48a and the lower pipe 48b are integrally formed, it is possible to increase rigidity, further reduce the number of parts, and improve the efficiency of sheet manufacturing work.

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 component manageability.
However, the present invention is not limited to such a pipe shape, 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 ratio of the cushion pad 1a may be increased on the front side to reduce the rigidity on the front side of the vehicle seat S. By doing in this way, when the vehicle is subjected to a rear collision or a side collision, the body of the seated person can easily enter the vehicle seat S backward, and the load on the seated person due to the rear collision or the side collision can be reduced. Can do.
For the same reason, the upper pipe 48a has an outer diameter smaller than the outer diameter of the lower pipe 48b, and the ratio of the cushion pad 2a is increased on the upper side so that the rigidity on the front side of the vehicle seat S is reduced. Also good.

The resin frame 38 is formed of a resin material such as glass fiber-containing plastic, and the front end thereof covers the front pipe 37a and the rear end thereof covers the rear pipe 37b. Is formed. In addition to the plastic containing glass fiber, it may be made of plastic resin material such as CFRP, plastic without glass fiber or carbon fiber.
Then, as shown in FIG. 25, two headrest stays HS serving as a rectangular tubular member that is continuous vertically are sandwiched between the upper part of the front pipe 37a and the upper part of the rear pipe 37b. It is fixed. Further, a 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.

The two headrest stays HS are portions to which the headrest S3 is attached by receiving a headrest pillar (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. When the resin frame 38 is molded, the headrest stay HS can be sandwiched between the front pipe 37a and the rear pipe 37b.

  Specifically, the headrest stay HS is joined to the resin frame 38 by insert molding to the resin frame 38 together with the front pipe 37a and the rear pipe 37b. With such a configuration, a separate attachment member for attaching the headrest stay HS to the front pipe 37a and the rear pipe 37b is not required, the number of parts can be reduced, a welding process is unnecessary, and manufacturing is easy. Become.

On the other hand, the headrest stay HS may be joined to the resin frame 38 by integral molding after the lower part is welded to the front pipe 37a and the upper part 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-like brackets 38a are formed so as to connect both ends on both sides of the resin frame 38 in the sheet width direction.
The plate-shaped bracket 38a constitutes a part of the resin frame 38 and is integrally formed continuously, and is formed so that a weight 38b is disposed at the center.
The bracket 38a including 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 sheet width direction, and an S spring 36 described later with reference to FIG. The S spring 36 provided on the seat back frame 3 is not shown in FIG.

(Attaching the S spring)
Next, attachment of the S spring 36 will be described.
As described above, the vehicle seat S is provided with the S spring 36 that provides cushioning 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 a connecting portion 76a of a pan frame 76 that constitutes the seat cushion frame 4.
Specifically, both ends of the S spring 36 are attached to a hook 76d that is continuously formed integrally with the connecting portions 76a on both sides in the sheet width direction.
As shown in FIG. 28, the hook 76d protrudes inward in the sheet width direction of the connecting portions 76a on both sides and extends in the front-rear direction, and is formed in the front-rear direction to hold the end of the S spring 36. A hole 76b is provided.

  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. In addition, since it is not necessary to cut and raise the seat cushion frame 4 in order to hold the S spring 36, the efficiency of attaching the S spring 36 can be improved.

The S spring 36 on the seat back S1 side is omitted in FIG. 23, but is attached to the inner side in the seat width direction of each of the lower side frame portion 22a and the resin frame 38 as shown in part in FIG. Yes.
Specifically, the S spring 36 below the seat back S1 is attached by a hook (not shown) formed by being cut and raised 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 a portion where the hook is formed. A resin frame 38 may be formed on the substrate.

Further, as shown in FIG. 26, the S spring 36 above the seat back S1 has both ends attached to a hook 50 that is continuously formed integrally from both sides of the resin frame 38 in the seat width direction and protrudes inward in the seat width direction. It has been.
The hook 50 as an attachment portion has a holding hole 50a that is formed in the sheet width direction on both sides of the resin frame 38 in the sheet width direction and holds the end portion of the S spring 36. The holding hole 50a has a seat front direction and a seat width. A protrusion 50b is formed to protrude so as to protrude inward in the direction.
In other words, the protrusion 50b is formed together with the holding hole 50a so as to be cut and raised from the both sides of the resin frame 38 in the sheet width direction.

  As described above, since the S spring 36 can be held on the hook 50 integrally formed with the resin frame 38, it is not necessary to provide a separate attachment member for holding the S spring 36. Further, since it is not necessary to cut and raise the seat back frame 3 in order to hold the S spring 36, the efficiency of the mounting operation of the S spring 36 can be increased.

<15th modification>
As shown in FIG. 27, a hook 51 as an attachment portion according to a fifteenth modification different from the hook 50 has a protruding portion 51b having a tip 51c formed larger than other portions.
A tip 51c, which is a protrusion that protrudes outward in the sheet width direction from other portions, is formed in the protruding portion 50b so as to extend in the vertical direction at the edge facing the penetrating portion of the holding hole 51a.
By forming the tip 51c in this way, it is possible to prevent the S spring 36 assembled to the projecting portion 51b from passing through the holding hole 51a and being caught by the tip 51c, thereby preventing the hook 51 from coming off.
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 with a tactile sense, the assembled state can be quickly performed by recognizing the locking state. Is possible.
The hook 51 having such a configuration may be applied to the hook 76d of the seat cushion frame 4.

  Alternatively, the S spring 36 may be integrally molded with the resin frame 38 as a resin spring. In this way, by providing the resin at the hooked portion of the S spring 36 with a spring property, the entire length of the S spring 36 can be shortened.

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

More specifically, the upper pipe 49a is formed in a U-shape when connected to the upper front portions of the connecting frames 75a and 75b, and is formed in a U shape in top view. The central part in the sheet width direction extends linearly and is formed at a substantially constant height without being greatly 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 a frame member according to the present invention.
The lower pipe 49b is formed in a U-shape when viewed from above, with the end side connected to the lower front side of each of the connecting frames 75a and 75b. The lower pipe 49b extends forward from both ends with a shorter length than the upper pipe 49a. After that, the central portion in the sheet width direction extends linearly and is formed at a substantially constant height without being greatly bent in the height direction.

According to the seat cushion frame 5 according to the modified example, it is easy to prevent the upper pipe 49a and the lower pipe 49b from overlapping each other, and it is possible to insert-mold the pan frame 76 after being combined in a predetermined shape, so that manufacture is easy. It becomes.
On the other hand, according to the seat cushion frame 4 according to the example of the third embodiment shown in FIG. 29, it is easy to apply a load from a seated person, and the upper part along the edge of the rear part of the pan frame 76 where rigidity is required. The pipe 48a can be disposed, and durability can be improved.

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

Specifically, in the upper pipe 55a and the lower pipe 55b on the front side of the connection frames 75a and 75b shown in FIG. 23 and covered with the connecting portion 76a of the pan frame 76, the introduction holes 56a and 56b are respectively provided. Two are formed on the front and rear.
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.
In this manner, the introduction holes 56a and 56b are formed, so that the pan frame 76 can be formed and the pan frame 76 can be connected to the upper pipe 55a and the lower pipe 55b.

In the upper pipe 55a and the lower pipe 55b, crushing 57a and 57b are formed in front of the introduction holes 56a and 56b, respectively.
The crushing 57a, 57b is formed so as to close a part of the internal space of the upper pipe 55a and the lower pipe 55b.
Thus, by forming the crushing 57a, 57b, it is possible to limit the resin introduced into the upper pipe 55a and the lower pipe 55b from the introduction holes 56a, 56b before the crushing 57a, 57b. It becomes possible.
That is, by the crushing 57a and 57b, the region where the resin enters is limited to a region closer to the introduction holes 56a and 56b than the crushing 57a and 57b as a region necessary for the connection between the pan frame 76 and 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 (the opposite side of the introduction holes 56a and 56b) from the crushing 57a and 57b of the upper pipe 55a and the lower pipe 55b. For this reason, the seat cushion frame 4 can be reduced in weight.
Further, for example, when the connecting frames 75a and 75b are welded to the upper pipe 55a and the lower pipe 55b, since the crushing 57a and 57b are formed, the welding allowance can be secured, and the joint strength can be secured. Can be increased.

  Furthermore, the introduction holes 56a and 56b of the upper pipe 55a or the lower pipe 55b are not limited to the portion covered with the connection portion 76a of the pan frame 76, and may be formed at an arbitrary position. The upper pipe 55a or the lower pipe is closed so as to close the hollow space on both sides of the filling region so that the molten resin is filled into the upper pipe 55a and the lower pipe 55b through the introduction holes 56a and 56b. The structure by which crushing is formed in 55b may be sufficient.

  As described above, the technology for filling the resin into the pipe by the introduction holes 56a and 56b and the technology for restricting the resin filling area by the crushing 57a and 57b are not limited to those constituting the seat cushion frame 4 as a matter of course. It can be applied to the seat back frames 1 and 3.

In the above embodiment, the connecting frame 75a on the both sides in the seat width direction of the upper pipe 48a and the lower pipe 48b and portions extending linearly from the connecting frame 75b are formed at positions where they overlap each other in the seat vertical direction. Explained.
Similarly, it has been described that the portions of the front pipe 37a and the rear pipe 37b on both sides in the seat width direction are formed at substantially overlapping positions in the seat front-rear 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 disposed outside the rear pipe 37b in the seat width direction.
If it does in this way, it will become easy for a seated person's body to enter at the time of rear collision of a vehicle, and it can control that an excessive load is added to a seated person's body.

Further, the lower pipes 48b and 49b of the seat cushion frame 4 may be disposed on the outer side in the seat width direction than the upper pipes 48a and 49a.
In this way, the lower pipes 48b, 49b and the upper pipes 48a, 49a are displaced in the left-right direction, so that when the pan frame 76 is insert-molded by superimposing them, the molten resin is easily spread and the moldability is improved. improves.
Similarly, when the front pipe 37a and the rear pipe 37b are shifted in the left-right direction, the formability can be similarly improved.

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

Furthermore, in the third embodiment, it has been described that the seatback frame 3 is provided with the front pipe 37a and the rear pipe 37b separately. However, the seatback frame 3 is composed of a single pipe to which these are connected. May be. 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 provided separately. However, the seat cushion frame 4 is composed of a single pipe connected thereto. May be. Specifically, the upper pipes 48a and 49a and the lower pipes 48b and 49b may be connected on the connection frame 75a side.

Moreover, these metal pipes may have a plurality of introduction holes that connect the hollow interior and the exterior.
According to such a configuration, when the resin frame or pan frame is insert-molded so as to cover these pipes, the molten resin is poured into the hollow interiors of these pipes so as to pass through these introduction holes. Since it becomes possible to shape | mold, rigidity can be improved.

  Moreover, in the said embodiment, although the vehicle seat was demonstrated, this invention is not limited to what concerns on a vehicle seat. In order to improve the fuel efficiency by reducing the weight while securing the rigidity, it can be applied to a vehicle seat such as a ship, an aircraft, and an industrial machine.

About said embodiment, it can describe also like the following additional remarks.
(Appendix 1)
A seat frame that has a linear frame formed in an inverted U-shape and forms a skeleton of a seat, and includes a cylindrical member that supports a headrest, and at least two of the linear frames are arranged on the front and rear sides. The seat frame is characterized in that the cylindrical member is sandwiched and held between the linear frames.
According to the said structure, the cylindrical member can be improved by the rigidity improvement of a cylindrical member by being inserted | pinched and attached to the linear frame.

(Appendix 2)
The seat frame according to appendix 1, wherein the tubular member is welded and joined to the linear frame.
According to the said structure, the rigidity of a cylindrical member can be improved because the cylindrical member is joined 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 cylindrical member is integrally formed with the linear frame and the other member, the number of parts can be reduced and workability can be improved.

(Appendix 4)
The seat frame according to any one of appendices 1 to 3, wherein the linear frame is a pipe.
According to the said structure, since a linear frame is a pipe, it can be reduced in weight rather than a solid thing.

(Appendix 5)
The seat frame according to appendix 4, wherein the pipes have the same diameter.
According to the above configuration, by making the pipe diameters the same, it is possible to improve parts manageability and improve 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, it is easy for the seated person's body to enter at the time of rear-end collision of the vehicle, and an excessive load can be suppressed from being applied to the seated person's body.

(Appendix 7)
The seat frame according to any one of appendices 4 to 6, wherein an end portion side of the pipe is crushed and formed.
According to the said structure, since the end part side of a pipe is crushed, ensuring of a welding allowance becomes easy and workability | operativity improves.

(Appendix 8)
The pipe is provided with a hole that communicates the outside with the inside, and the pipe is filled with a molten resin, and a resin material is formed to the outside through the hole. Seat frame.
According to the said structure, rigidity improvement can be improved by filling the inside of a pipe with molten resin and forming a resin material to the exterior of a pipe.

(Appendix 9)
The seat frame according to claim 1, wherein the linear frame is formed of at least two members.
According to the said structure, workability | operativity can be improved by simplifying a shape.

(Appendix 10)
The seat frame according to appendix 1, wherein the linear frame is formed of a single member.
According to the said structure, workability | operativity can be improved by simplifying a shape.

(Appendix 11)
The seat frame according to appendix 1, wherein an attachment member for attaching to another member is provided on an end portion side of the linear frame.
According to the said structure, workability | operativity 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 said structure, rigidity can be improved because the other member is provided so that the space of a linear frame may be filled up.

(Appendix 13)
The seat frame according to appendix 12, wherein the other member is provided with an attachment portion for attaching a pressure receiving member that supports an occupant.
According to the above configuration, since the attachment portion for attaching the pressure receiving member to the other member is provided, it is not necessary to use the attachment portion separately, so the number of parts can be reduced, and the trouble of attaching the attachment portion is reduced. Therefore, workability can be improved.

(Appendix 14)
The seat frame according to appendix 13, wherein the attachment portion is provided integrally with another member, and an end portion side of the attachment portion is formed larger than the other portion.
According to the said structure, workability | operativity can be improved because the attaching part is integrally provided in the other member, and pressure is received because the edge part side of the attaching part is formed larger than the other part. It can suppress that a member remove | deviates from an attaching part.

(Appendix 15)
The seat frame according to appendix 14, wherein the pressure receiving member is formed integrally with the other member.
According to the above configuration, it is possible to reduce the weight while reducing the number of parts.

(Appendix 16)
A seat frame comprising a seat skeleton including a seat cushion frame, wherein the seat cushion frame is formed so as to connect the plurality of linear frames formed in a substantially U shape and the plurality of linear frames. And a plate-like pan frame, wherein at least one of the plurality of linear frames is bent in a vertical direction.
According to the said structure, rigidity is improved because at least 1 of a linear frame is bent up and down, and it can suppress that a seat frame bends 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 a seat cushion.
According to the said structure, rigidity can be improved because the upper linear frame is bent and it can suppress that a seat frame bends.

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

(Appendix 19)
The seat frame according to appendix 16, wherein an attachment member for attaching the plurality of linear frames is provided.
According to the said structure, the attachment workability | operativity of several linear frames can be improved because the attachment member which attaches several linear frames is provided.

(Appendix 20)
The seat frame according to appendix 16, wherein the plate-like pan frame is made of carbon resin.
According to the said structure, it can reduce in weight because the plate-shaped pan frame is formed with carbon resin.

(Appendix 21)
The seat cushion frame has a height mechanism that adjusts the height of the seat, and the height mechanism has a link structure including a plurality of links, and the plurality of links are covered with resin. The seat frame according to supplementary note 16, wherein
According to the said structure, it can reduce in weight by reducing the ratio of a metal as a whole by the part where a link is covered with resin.

HS headrest stay (tubular 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 portion 26e Space 27 Side frame (frame member)
27a Rib (reinforcement part)
28 Side frame (frame member)
28a Honeycomb part (reinforcement part)
28b Hole part 28c Partition part 29 Side frame (frame member)
29a Honeycomb part (reinforcement 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 hole (mounting part)
50b, 51b Protrusion 51c Tip 56a, 56b Introduction hole (hole)
57a, 57b Collapse 70 Side frame (frame member)
70a Resin plate (reinforcement part)
70b Hole 70c Partition 71, 72 Side frame (frame member)
71a, 72a Uneven part (reinforcement part)
75a, 75b Connection frame 75c Engagement hole 75d Connection shaft 76 Pan frame (resin part, plate-shaped pan frame)
76a Connection part 76b Holding hole (Mounting part)
76d hook

Claims (23)

A vehicle seat frame comprising a frame member,
The frame member is composed of a metal part and a resin part formed so as to cover the outer surface of the metal part, and has a side frame arranged and extended on both sides in the sheet width direction,
A plurality of the metal parts 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 respective outer surfaces of the plurality of metal portions and extend in the extending direction of the side frame;
A seat frame comprising: a second extension portion extending in a direction crossing the extension direction of the side frame and connecting the plurality of first extension portions.   The seat frame according to claim 1, wherein the metal portion has a hollow portion.   The seat frame according to claim 1, wherein the metal portion is formed in a U-shaped cross section.   The seat frame according to any one of claims 1 to 3, wherein the metal portion is formed in a U shape when viewed from the side of the seat.   The part which covers the said metal part among the said resin parts is extended in the extension direction of the said metal part, The seat frame as described in any one of the Claims 1 thru | or 4 characterized by the above-mentioned.   The seat frame according to any one of claims 1 to 5, wherein a space is formed in a central portion of the resin portion in a direction intersecting with an extending direction of the side frame.   The seat frame according to any one of claims 1 to 6, wherein a reinforcing portion is provided in a central portion of the resin portion in a direction intersecting with an extending direction of the side frame.   The seat frame according to claim 7, wherein the reinforcing portion has a honeycomb structure. In the metal part, a hole communicating with the hollow part inside and the outside is formed,
The seat frame according to claim 2, wherein the resin portion is formed from the hollow portion to the outside through the hole.   2. The seat frame according to claim 1, wherein the metal portion is a linear frame that is formed in an inverted U shape in a front view of the seat and forms a skeleton of the frame member. It has a cylindrical member that supports the headrest,
The seat frame according to claim 10, wherein the cylindrical member is sandwiched and held by a plurality of the linear frames.   The seat frame according to claim 11, wherein the cylindrical member is welded to the linear frame.   The seat frame according to claim 11 or 12, wherein the cylindrical member is integrally connected to the linear frame by the resin portion.   The seat frame according to any one of claims 10 to 13, wherein the linear frame is a pipe. The pipes are arranged at the front and back,
The diameter of the pipes arranged at the front and back is different,
The seat frame according to claim 14, wherein a diameter of the pipe positioned on the front side of the seat is smaller than a diameter of the pipe positioned on the rear side of the seat.   The seat frame according to claim 14 or 15, wherein an end portion side of the pipe is crushed.   The seat frame according to any one of claims 10 to 16, wherein a mounting bracket for attaching the linear frame and the resin portion is provided on an end side of the linear frame.   The seat frame according to any one of claims 1 to 17, wherein an attachment portion for attaching a pressure receiving member that supports an occupant is formed in the resin portion. The mounting portion is provided integrally with the resin portion,
The tip of the mounting part is formed larger than the other part,
The seat frame according to claim 18, wherein the pressure receiving member is engaged with the tip.   The seat frame according to any one of claims 1 to 17, further comprising a pressure receiving member formed integrally with the resin portion. A seat frame according to any one of claims 1 to 20,
A cushion member provided on the seat frame;
A vehicle seat comprising: a skin material that covers the cushion member and is attached to the seat frame. A vehicle seat frame manufacturing method comprising a frame member having a hollow metal part and a resin part joined to at least a part of the metal part and extending in a predetermined direction,
An injection step of pouring molten resin around the metal part;
A cooling step of pouring water or air into the hollow part of the metal part;
A method for manufacturing a seat frame, comprising molding the resin portion by injection molding.   The seat frame manufacturing method according to claim 22, wherein the metal part is formed integrally with the resin part by insert molding.

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