KR101886294B1 - Rear seat, rear seat back frame and manufcturing method thereof - Google Patents

Abstract

The present invention relates to a rear seat back frame and a manufacturing method thereof, and a rear seat. The rear seat back frame comprises: a frame body unit in which a reinforcing space having an opening is formed on one surface; a reinforcing unit arranged in the reinforcing space; a closing panel unit coupled to the frame body unit to close the opening of the reinforcing space; and a finishing unit coupled to the close panel unit.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a rear seat, a rear seat back frame,

The present invention relates to a rear seat, a rear seatback frame and a method of manufacturing the same.

A front seat (FRONT SEAT) and a rear seat (REAR SEAT) are arranged in a vehicle interior, and the front seat and rear seat each include a seat cushion for occupants to seat and a seatback for a back. The seatback includes a rear seatback frame that forms an internal skeleton and a pad that is comfortable to the rear seatback frame.

In the case of vehicles such as Recreational Vehicle (RV), Multi-Purpose Vehicle (MPV) and Sport Utility Vehicle (SUV), the rear seat connected to the trunk can be used for emergency braking of the vehicle, And the rear seat back frame may be damaged due to the impact, which may jeopardize the safety of the occupant.

The rear seatback frame is made of metal or plastic so that it does not cause problems such as deformation and breakage due to impact. Generally, a plastic rear seatback frame is manufactured by forming a preform through compression molding with a glass mat thermoplastic (GMT) or a continuous fiber reinforced thermoplastic composite (CFT) After the step of cutting according to the mold, channels or ribs are combined through injection to complement the structural rigidity.

However, in the case of a rear seatback frame to which a thermoplastic composite material is applied, a weight reduction ratio can be achieved as compared with a metal rear seatback frame, but the cost of parts rises. In addition, if a preform is formed by compression molding and then supplied to an injection mold to perform insert injection molding, an additional process is required to insert the preform, which is complicated in the process, into the injection mold for final molding, Time and process ratio.

The rear surface of the rear sheet is connected to the rear surface of the rear sheet by a water treatment so as to cover the rib formed by the injection molding. The uniformity of the process in the nonwoven fabric is lowered and the material around the rib is pressed by the material in the trunk, There is a problem that the sensibility quality is lowered.

Registration No. 10-1616634 (Apr. 22, 2016) Patent No. 10-0923359 (October 16, 2009)

The present invention provides a technique that can simplify a manufacturing process by performing extrusion molding and injection molding of a rear seatback frame in one die.

The present invention provides a technique for increasing the rigidity of the rear seatback and enhancing the quality of the rear sensibility.

A rear seatback frame according to an embodiment of the present invention includes a frame body portion having a reinforcing space having an opening on one side thereof, a reinforcing portion disposed in the reinforcing space, a cover portion coupled to the frame body portion, And a finishing portion joined to the panel portion and the close panel portion.

The rigidity of the closed panel portion may be greater than the rigidity of the closed portion.

The reinforcing portion may include a reinforcing body located in the reinforcing space and connected to the closing panel portion, and a reinforcing rib connected to the reinforcing rib and connected to the reinforcing space.

The thickness of the reinforcing rib and the reinforcing body may be 0.5 mm to 5 mm.

The reinforcing portion may further include a hinge connection portion disposed on both sides below the frame body portion and connected to the reinforcing main body and the reinforcing rib. At least a part of the hinge connection portion may not be covered by the close panel portion.

The thickness of the hinge connection part may be 3 mm to 20 mm.

The reinforcing portion is in contact with the frame body portion, and the reinforcing portion can contact the area of 5% to 20% of the total area of the frame body portion.

The thickness of the frame body portion and the close panel portion may be 0.5 mm to 4 mm.

The reinforcing portion may connect the frame body portion, which is located in the reinforcing space and constitutes the reinforcing space, to the close panel portion.

The frame body portion and the close panel portion may be formed of a continuous fiber reinforced thermoplastic composite material (CFT), and the reinforcing portion may be formed of Long Fiber Reinforced Thermoplastics (LFT).

The finishing portion may be a nonwoven fabric.

According to another aspect of the present invention, there is provided a rear seat back frame comprising: a frame main body having a reinforcing space having an opening on one side thereof; a reinforcing portion disposed in the reinforcing space; A panel portion and a nonwoven fabric bonded to the closed panel portion, wherein the entire one surface of the nonwoven fabric is in contact with one surface of the close panel portion.

A rear seat according to an embodiment of the present invention includes a rear seatback frame configured as described above, a cushion pad coupled with the rear seatback frame, a cover covering the cushion pad, and a seat cushion connected to the rear seatback frame.

A method of manufacturing a rear seatback frame according to an embodiment of the present invention includes the steps of supplying a heated first resin to a mold, compressing the first resin to form a frame body portion, And forming a reinforcing portion connected to the frame body portion, wherein the reinforcing portion is engaged with the frame body portion by circular step over molding in a mold in which the frame body portion is compression molded.

The method of manufacturing a rear seatback frame may further include compressing the frame body portion and the closed panel portion with the reinforcing portion interposed therebetween, thereby joining the frame body portion and the closing panel portion.

In the step of joining the frame body part and the close panel part, the finish part and the close panel part are stacked, and when the close panel part and the frame body part are joined, the finish part and the close panel part can be joined together.

The entire one surface of the finishing portion and one entire surface of the close panel portion are in contact with each other.

The close panel portion may have a stiffness greater than that of the finish portion.

The closed panel part may be formed of a continuous fiber-reinforced thermoplastic composite material, and the finishing part may be formed of polyethylene terephthalate (PET) or polypropylene.

In the step of forming the reinforcing portion, the second resin may be supplied while the heated first resin has a temperature exceeding normal temperature.

According to the embodiment of the present invention, the compression molding and the injection molding are performed in one mold by supplying the long fiber-reinforced thermoplastic composite material to the frame main body while injection molding the reinforcement part while compressing the frame body part, thereby simplifying the manufacturing process. Further, since the reinforcing portion is formed before the compression molding of the frame body portion and the injection molding of the reinforcing portion are sequentially performed in the single mold, and the frame body portion is faded by the heat applied before the compression molding, And the interfacial bonding force to the reinforcing portion can be improved.

According to the embodiment of the present invention, when the closing panel part and the frame body part are combined, the closing panel part and the finishing part are joined to each other at the same time, so no separate process for joining the closed panel part and the finish part occurs. Can be simplified.

According to the embodiment of the present invention, since the compression molding for forming the frame body and the injection molding for forming the reinforcing portion are formed in one mold, it is not necessary to provide a separate mold for injection molding, .

According to the embodiment of the present invention, injection molding is continuously performed for forming the reinforcement portion without separating the frame body portion from the mold for injection molding after compression molding, thereby shortening the cycle time for molding, thereby minimizing the manufacturing time .

According to the embodiment of the present invention, since the injection molding is continuously performed in a mold obtained by compression molding, compared with the conventional technique which requires a trimming process for insertion into an injection mold, Time can be shortened and manufacturing time can be minimized.

According to the embodiment of the present invention, since the contact portions between the closed panel portion and the finishing portion are laminated to each other in a heated state, the closed portion and the closed panel portion which are compatible with each other during compression molding of the closed panel portion and the frame body portion are coupled to each other. As a result, a separate adhesive application step for attaching the finish part to the closed panel part does not occur, and the uniformity due to the combination of the finish part and the closed panel part can be improved along with the reduction of the labor cost due to the application of the adhesive.

1 is a schematic view showing a rear seat according to an embodiment of the present invention;
Fig. 2 is an exploded perspective view showing the rear seatback frame of Fig. 1; Fig.
3 is an enlarged view of a portion A in Fig.
4 is an enlarged view of a portion B in Fig.
Fig. 5 is an exploded perspective view showing a state where the frame body portion and the reinforcing portion of Fig. 1 are engaged. Fig.
Figs. 6 and 7 are schematic views showing another embodiment of the reinforcement portion of Fig. 2; Fig.
Fig. 8 is an exploded perspective view showing a state where the frame body portion of Fig. 5 and the close panel portion are coupled. Fig.
9 is an exploded perspective view showing a state in which the finishing section is coupled to the closed panel section of Fig.
10 is a cross-sectional view taken along the line X-X of FIG. 9;
11 is an enlarged view of a portion C in Fig.
FIG. 12 is a sectional view taken along line XII-XII of FIG. 9; FIG.
13 is an enlarged view of a portion D in Fig.
14 is a block diagram showing a manufacturing process of a rear seatback frame according to an embodiment of the present invention.
15 is a schematic view showing a comparative example and an example for showing an energy absorption rate;
16 shows the energy absorption rate through the three-point bending analysis.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Like parts are designated with like reference numerals throughout the specification.

The rear seatback frame according to the embodiment of the present invention can be applied to a rear seat which is an embodiment of the present invention. Hereinafter, a rear seat back frame to which a rear seatback frame is applied will be described.

A rear seat according to an embodiment of the present invention will now be described with reference to FIG.

1 is a schematic view showing a rear seat according to an embodiment of the present invention.

1, the rear seat 100 includes a seat cushion 2 and a seatback 1, and the seatback 1 includes a rear seatback frame 1b and a pad 1a. The rear seatback frame 1b is hingedly connected to the seat cushion 2 and the pad 1a is disposed in the rear seatback frame 1b to provide comfort to the occupant.

The detailed configurations of the squeak cushion 2 and the pad 1a are the same as those of the known seat cushion and pad, and a detailed description thereof will be omitted.

Next, the rear seat back frame 1b will be described with reference to Figs. 2 to 13. Fig.

Fig. 2 is an exploded perspective view showing the rear seatback frame of Fig. 1, Fig. 3 is an enlarged view of a portion A of Fig. 2, Fig. 4 is an enlarged view of a portion B of Fig. 6 and 7 are schematic views showing another embodiment of the reinforcement portion of FIG. 2, FIG. 8 is an exploded perspective view showing a state where the frame body portion of FIG. 5 and the close panel portion are combined 9 is an exploded perspective view showing a state in which the finishing section is coupled to the closed panel section of Fig. 8, Fig. 10 is a cross-sectional view taken along line X-X of Fig. 9, FIG. 12 is a cross-sectional view taken along line XII-XII of FIG. 9, and FIG. 13 is an enlarged view of a portion D of FIG.

2, the rear seatback frame 1b according to the present embodiment includes a frame body portion 10, a reinforcing portion 20 (not shown), a seat back A closing panel 30, and a finishing unit 40. [0031]

The rear seatback frame 1b may include 50 to 70 parts by weight of a continuous fiber reinforced thermoplastic composite (CFT) and 30 to 50 parts by weight of Long Fiber Reinforced Thermoplastics (LFT) . If the continuous fiber-reinforced thermoplastic composite material is less than 50 parts by weight, the mechanical strength may be lowered. If the continuous fiber-reinforced thermoplastic composite material is less than 30 parts by weight, the strength may be lowered, and if it is more than 10 parts by weight, have.

The frame body portion 10 constitutes the front face (the traveling direction of the vehicle) of the rear seatback frame 1b. A pad can be coupled to the front surface of the frame body portion 10 and a reinforcing portion 20, a closed panel portion 30 and a finishing portion 40 are disposed on the rear surface (trunk direction).

On the rear surface of the frame body portion 10, a plurality of reinforcing spaces 11 are formed at intervals in the vertical direction Z and the lateral direction X. [ The reinforcing space 11 is formed such that the rear surface thereof is recessed in the front direction. Depending on the design of the frame body 10, the depths of the plurality of reinforcing spaces 11 may vary with respect to the rear surface of the frame body 10. [

A reinforcing space 11 is formed along the rear edge of the frame body portion 10. The plurality of reinforcing spaces 11 are connected to each other. The reinforcing space 11 is formed by recessing the rear surface of the frame body portion 10 in the front direction. A protruding portion corresponding to the reinforcing space 11 is formed on the front surface of the frame body portion 10. By forming the reinforcing space 11, the structural rigidity of the frame body portion 10 is improved. Thus, deformation of the frame body 10 due to twisting, pressure, and the like can be minimized. The shape of the reinforcing space 11 can be variously changed depending on the design of the rear seatback frame 1b.

The frame body portion 10 can be made of a continuous fiber-reinforced thermoplastic composite material excellent in mechanical strength, rigidity and impact performance. The continuous fiber reinforced thermoplastic composite material may include polypropylene or glass fiber. And may include engineering plastics such as polyamide, polyacetal, polycarbonate, polyphenylene oxide, polybutylene terephthalate, and the like. . The frame body portion 10 can be made of carbon.

The frame body portion 10 may be formed by compression molding, and the surface thickness 10t of the frame body portion 10 (see FIG. 12) may be 0.5 mm to 5 mm. If the thickness of the frame body portion 10 is less than 0.5 mm, it may be easily damaged by the impact. If the thickness is more than 5 mm, it may increase the weight and increase the cost.

3 and 5, the reinforcing portion 20 is disposed along the reinforcing space 11 and is connected to the frame body portion 10. As shown in Fig. The reinforcing portion 20 is formed by injection molding in a metal mold in which the frame body portion 10 is compression molded, and is joined to the frame body portion 10. The reinforcing portion 20 and the frame body portion 10 may be integrally formed. The reinforcing portion 20 reinforces the frame body portion 10 to increase the strength of the rear seatback frame 1b.

The reinforcing portion 20 includes a reinforcing main body 21, a reinforcing rib 22 and a hinge connecting portion 23 and is located in the reinforcing space 11. [ The reinforcing portion 20 protrudes in the trunk direction in the reinforcing space 11 and does not leave the reinforcing space 11.

The reinforcing main body 21 is formed in a bar shape and has a predetermined length and width W, and is arranged in plural in the up-down direction Z and the left-right direction X and connected to each other. The width W of the reinforcing main body 21 may vary depending on the depth of the reinforcing space 11. [ The reinforcing main body 21 is located at the center of the reinforcing space 11 and arranged along the reinforcing space 11. [ The reinforcing ribs 22 are formed in a bar shape and have a predetermined length and width, and protrude perpendicularly from one surface of the reinforcing main body 21. A plurality of reinforcing ribs 22 are formed at intervals along the longitudinal direction of the reinforcing main body 21, and the peripheries thereof are in contact with the reinforcing space 11. The width of the reinforcing rib 22 may vary depending on the depth of the reinforcing space 11 and is equal to the width of the reinforcing main body 21 at the portion where the reinforcing ribs 22 are formed.

The thickness t1 of the reinforcing main body 21 may be 1 mm to 5 mm and the thickness t2 of the reinforcing rib 22 may be 0.5 mm to 5 mm. The thickness t1 of the reinforcing main body 21 may be greater than or equal to the thickness t2 of the reinforcing rib 22. [ If the thickness t2 of the reinforcing ribs 22 exceeds 5 mm and the thickness t1 of the reinforcing main body 21 exceeds 5 mm, the increase of the material usage may cause a cost increase factor and the weight of the rear seatback frame 1b Can increase

The reinforcement main body 21 and the reinforcing ribs 22 are integrally formed and can be made of a long fiber-reinforced thermoplastic composite material which is excellent in moldability and is easy to mold in a complicated shape. The long fiber-reinforced thermoplastic composite material may include polypropylene or long glass fiber. At this time, the continuous fiber-reinforced thermoplastic composite material constituting the frame body part 11 and the long fiber-reinforced thermoplastic composite material constituting the reinforcing part 20 are made of the same resin, and the interfacial adhesion between the frame body part 11 and the reinforcing part 20 .

The reinforcing portion 20 is in contact with the frame body portion 10. The reinforcing portion 20 is in contact with the area of 5% to 20% of the total area of the frame body portion 10. [ If the contact area of the reinforcement portion 20 is less than 5%, the reinforcement strength can not be increased. If the contact area exceeds 20%, the increase in weight and cost increase may be caused.

The hinge connection portions 23 are formed as a pair and are respectively disposed on both lower sides of the frame body portion 10 and are connected to the reinforcing main body 21 and the reinforcing ribs 22. The hinge connection portion 23 protrudes forward of the frame body portion 10. The frame body portion 10 covers a protruding portion of the hinge connection portion 23. The hinge connection portion 23 is formed with a hinge groove 23a into which a hinge (not shown) of a recliner is inserted. The hinge connection portion 23 may be formed to have a thickness of 3 mm to 20 mm. If the thickness of the hinge connecting portion 23 is less than 3 mm, the seatback 1 may be easily broken during the angle adjusting process. If the thickness is more than 20 mm, the formability may be deteriorated.

Next, another embodiment of the reinforcing portion will be described with reference to FIG.

6A, the reinforcing ribs 22 are connected to the reinforcing main body 21 and are in contact with the bottom surface 11a of the reinforcing space 11 and opposite side surfaces facing each other, Respectively. The sectional shape of the reinforcing rib 22 as seen from the plane is formed in the " n " shape and has an opening portion like the reinforcing space 11. The reinforcing main body 21 is formed in the shape of a bar and protrudes in the direction of the opening of the reinforcing space 11 in the longitudinal direction of the reinforcing rib 22 at the center of the reinforcing rib 22. The reinforcing ribs 22 and the reinforcing main body 21 are integrally formed.

Referring to FIG. 6B, the reinforcing ribs 22 are formed in a bar shape and are formed continuously along the bottom surface 11a of the reinforcing space 11. As shown in FIG. The reinforcing main body 21 is also formed in a bar shape and is disposed along the longitudinal direction of the reinforcing ribs 22 and protrudes toward the opening portion of the reinforcing space 11. [

Referring to FIG. 6C, the reinforcing ribs 22 may be omitted. In this case, the reinforcing main body 21 is formed in a bar shape and protrudes in the direction of the opening of the reinforcing space 11 from the bottom surface 11a of the reinforcing space 11.

The thickness and shape of the reinforcing main body 21 and the reinforcing ribs 22 can be variously changed according to the design of the rear seat back frame 1b.

2 to 6, the reinforcing main body 21 and the reinforcing rib 22 are formed to have the same thickness t1 and t2. However, as shown in FIG. 7, The thickness t1 (t2) of the reinforcing rib 22 may be different. The thickness t1 of the reinforcing main body 21 located in the reinforcing space 11 can be formed thicker than the thickness t2 of the reinforcing rib 22. [ The thickness of the reinforcing main body 21 and the reinforcing rib 22 are not limited.

The reinforcing portion 20 can maximize the structural rigidity of the rear seatback frame.

8 to 13, the close panel unit 30 may be formed of the same material as the frame body unit 10 and may include a rear surface of the frame body unit 10 and a reinforcing portion 20 to close the opening of the reinforcing space 11. The portion of the hinge connection portion 23 where the close panel portion 20 is in contact with the hinge connection portion 23 and the hinge groove 23a is formed is not covered for hinge insertion. The reinforcing space 11 is formed in a hollow shape by the arrangement of the closed panel portion 30. [ By the hollow reinforcing space 11, the rear seatback frame can compensate the structural stiffness against bending and impact. The surface of the closed panel portion 30 is formed in a flat surface, and has a greater rigidity than the finishing portion 40 described later.

The reinforcing main body 21 can be stably positioned in the reinforcing space 11 even if the reinforcing main body 21 is connected to the closed panel portion 30 and the reinforcing ribs 22 are omitted. By omitting the reinforcing ribs 22, the use of the long fiber reinforced thermoplastic composite material can be minimized, and the cost for manufacturing the rear seat back frame can be reduced and the weight can be reduced.

The thickness 30t of the closed panel portion 30 may be 0.5 mm to 5 mm. If the thickness of the closed panel part 30 is less than 0.5 mm, it may be easily damaged by impact. If it exceeds 5 mm, the weight of the panel part 30 may increase. On the other hand, the thickness 30t of the closed panel portion 30 is equal to the thickness 10t of the reinforcing main body 10. However, the thickness 30t of the closed panel portion 30 may be thinner or thicker than the thickness 10t of the reinforcing body 10.

The finishing portion 40 is disposed on the outer surface of the closed panel portion 30 and improves the quality of the rear sensation of the rear seat. The close panel portion 30 may be formed in a flat plate shape so that the binding force between the closing portion 40 and the close panel portion 30 can be increased.

The finishing portion 40 may be formed of a nonwoven fabric structure and the finishing portion 40 may be formed of polyethylene terephthalate (PET) or polypropylene. The close panel portion 30 supports the finishing portion 40 as a whole. That is, the surfaces of the finishing portion 40 and the close panel portion 30 which are in contact with each other are entirely not in contact with each other. Therefore, there is no problem that the end portion (nonwoven fabric) around the rib is damaged by the external impact.

Next, a method of manufacturing the rear seatback frame according to the present invention will be described.

14, the rear seatback frame manufacturing method according to the present embodiment includes a step (S10) of supplying a heated first resin to a mold, a step (S10) of compressing the first resin, (S20) of forming a body part; and (S30) forming a reinforcing part connected to the frame body part by supplying a molten second resin to a mold used for the above compression molding. And further combining the frame body portion and the closed panel portion (S40). A continuous fiber-reinforced thermoplastic composite material may be used as the first resin, and a long-fiber-reinforced thermoplastic composite material may be used as the second resin.

In the step (S10) of supplying the continuous fiber-reinforced thermoplastic composite material to the mold, heat is applied to the continuous fiber-reinforced thermoplastic composite material in sheet form to supply the continuous fiber-reinforced thermoplastic composite material to the first compression mold in a state of lamination.

The frame body portion 10 is formed by compressing the continuous fiber-reinforced thermoplastic composite material to a predetermined pressure by using the first compression mold in the step S20 of forming the frame body portion. At this time, a reinforcing space is formed in the frame body portion 10, and the shape of the frame body portion may be changed according to the shape of the first compressed metal mold.

In step S30 of forming the reinforcing portion connected to the frame body portion, the long fiber reinforced thermoplastic composite material is supplied to the frame body portion 10 without detaching the frame body portion 10 from the first compression mold. Reinforced thermoplastic composite material and the reinforcing portion 20 connected to the frame body portion 10 by the injection molding method of the frame body portion 10 are formed. The frame main body 10 supplies the continuous fiber-reinforced thermoplastic composite material to the mold (step S10) without compressing the frame main body 10 in the first compression mold so as to supply the long fiber-reinforced thermoplastic composite material immediately after compression molding. The heat applied to the sheet-like continuous fiber-reinforced thermoplastic composite material is accumulated to some extent. Thus, the frame body portion 10 can be maintained at a temperature higher than normal temperature, for example, in a gel state for a certain period of time. The room temperature is the average temperature over the year and may be 20 ° C or 5 ° C. The room temperature may vary depending on the manufacturing environment.

Accordingly, the injection molding is performed by supplying the long fiber-reinforced thermoplastic composite material directly to the frame body portion without separating the frame body portion, which is formed first for injection molding and maintains a high temperature, in the first compression mold, There is no process of drawing a preform that has been compression-molded from a compression mold, cutting the drawn preform to fit the injection mold, and then inserting the preform into the injection mold to perform insert injection molding. Accordingly, according to the present embodiment, compression molding and injection molding are performed in one-step overmolding in one mold, which can save time and cost compared to conventional insert over molding.

Since the compression molding for forming the frame body portion and the injection molding for forming the reinforcing portion combined with the frame body portion are performed in the first compression mold, the frame body portion and the reinforcing portion have high bonding force. That is, the injection molding for forming the frame body portion and the injection molding for forming the reinforcing portion proceeds in a one-step overmolding manner in one mold, and the frame body portion maintains the gel state at a high temperature, The thermoplastic composite material and the reinforcing part are injected into the first compression mold in a molten state, so that the continuous fiber-reinforced thermoplastic composite material and the long fiber-reinforced thermoplastic composite material are melted at a high temperature in the first compression mold So that the interfacial adhesion is excellent.

In addition, since the compression molding and the injection molding proceed in a single mold in a short time, the chemical bonding between the frame body portion made of the continuous fiber-reinforced thermoplastic composite material and the reinforcing portion made of the long fiber-reinforced thermoplastic composite material is easier than the insert over molding The interfacial adhesion is superior to insert overmolding because of the ability to bond.

In the step (S40) of joining the frame body portion and the closed panel portion, a closed panel portion formed of a continuous portion made of a nonwoven fabric and a continuous fiber-reinforced thermoplastic composite material is prepared so that the closed panel portion and the frame body portion face each other with the reinforced portion interposed therebetween. And the closed panel portion and the frame body portion are compression-molded by the second compression mold. The rear panel portion and the frame body portion may be coupled to each other with the reinforcing portion interposed therebetween to form the rear seatback frame.

On the other hand, since the portion where the finish portion and the close panel portion are in contact with each other is made of the same material and is heated to the predetermined temperature, the portions which are in contact with each other are joined by the pressure applied when the frame body portion and the close panel portion are combined. Accordingly, when the close panel part and the frame body part are combined, the closed panel part and the finishing part are combined with each other at the same time, so that a process for joining the closed panel part and the finish part is not required separately. Do not.

To evaluate the energy absorption rate of the rear seatback frame, rear seatback frames were prepared as shown in FIG.

15A shows a state in which the reinforcing portion 20 is disposed in the reinforcing space 11 of the frame body portion 10 and the open portion of the reinforcing space 11 is kept open (Comparative Example 1) 15B shows a case where the frame body portion 10 is formed in the shape of a flat plate and the reinforcement portion 20 is disposed (Comparative Example 2), and FIG. 15C shows the reinforcing portion 20 of the frame body portion 10 The opening portion of the closed panel portion 11 is closed by the closed panel portion 30 and the reinforced portion is coupled with the closed panel portion 30 (Embodiment).

The reinforcing lead thicknesses of [Comparative Example 1], [Comparative Example 2] and [Example] were the same, and the total weight was also made the same.

As a result of evaluating the energy absorption rate through the 3-point bending section force of Comparative Example 1, Comparative Example 2 and Example, as shown in Fig. 16, It was confirmed that the shape of [Examples] exhibited the highest energy absorption rate than that of [Example 1] and [Comparative Example 2]. Thus, it can be seen that the structural rigidity of the rear seatback frame is improved by the close panel portion.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, Of the right.

100: rear seat 2: seat cushion
1: Seat back 1a: Pad
1b: rear seatback frame 10: frame body portion
11: reinforcement space 11a: bottom surface
20: reinforcement portion 21: reinforcement body
22: reinforcing rib 30: close panel part
40:

Claims (20)

A frame body portion having a reinforcing space having an opening on one surface thereof,
A reinforcing portion disposed in the reinforcing space and integrally formed with the frame body portion,
A closed panel part which is disposed on one surface of the frame body part and closes the opening part of the reinforcing space and is formed in a flat surface,
The closing panel unit
/ RTI >
Wherein the reinforcing space is formed in a shape that one surface of the frame body part is recessed in the other surface direction and the reinforcing part supports the close panel part in contact with the close panel part in the reinforcing space, And the finishing portion is engaged with the close panel portion which is simultaneously fused by heating when the close panel portion and the frame main body portion are combined without using an adhesive,
Rear seatback frame. The method of claim 1,
And the rigidity of the closed panel portion is larger than the rigidity of the closed portion. The method of claim 1,
The reinforcing portion
A reinforcing body located in the reinforcing space and connected to the close panel portion,
A reinforcing rib connected to the reinforcing body and connected to the reinforcing space around the reinforcing rib,
The rear seatback frame including a rear seatback frame. 4. The method of claim 3,
Wherein the reinforcing rib and the reinforcing main body have a thickness of 0.5 mm to 5 mm. 4. The method of claim 3,
Wherein the reinforcing portion further comprises a hinge connection portion disposed on both sides below the frame body portion and connected to the reinforcing main body and the reinforcing rib. The method of claim 5,
The rear seatback frame has a thickness of 3 mm to 20 mm. The method of claim 1,
Wherein the reinforcing portion is in contact with the frame body portion, and the reinforcing portion is in contact with an area of 5% to 20% of the total area of the frame body portion. The method of claim 1,
And the thickness of the frame body portion and the close panel portion is 0.5 mm to 4 mm. The method of claim 1,
Wherein the reinforcing portion connects the frame body portion, which is located in the reinforcing space and forms the reinforcing space, to the close panel portion. The method of claim 1,
The frame body portion and the close panel portion are formed of a continuous fiber reinforced thermoplastic composite material (CFT), and the reinforcing portion is formed of Long Fiber Reinforced Thermoplastics (LFT). 11. The method of claim 10,
Wherein the finishing portion is a nonwoven fabric. delete A rear seatback frame as defined in any one of claims 1 to 11
A cushion pad coupled with the rear seatback frame,
A cover covering the cushion pad and
A seat cushion connected to the rear seatback frame
. Supplying the heated first resin to the mold,
Compressing the first resin to form a frame body portion,
Supplying a molten second resin to the mold to form a reinforcing portion connected to the frame body portion, and
Coupling the frame body portion and the closed panel portion by compression molding the frame body portion and the closed panel portion with the reinforcing portion interposed therebetween,
/ RTI >
Wherein the reinforcing portion is engaged with the frame body portion by circular step overmolding in a mold in which the frame body portion is compression molded,
In the step of joining the frame body portion and the close panel portion, a finishing portion is stacked on the close panel portion, and when the close panel portion and the frame body portion are engaged, the finish portion and the close panel portion are coupled together
A method of manufacturing a rear seatback frame. delete delete 15. The method of claim 14,
Wherein the entire one surface of the finishing portion and one entire surface of the close panel portion are in contact with each other. The method of claim 14,
Wherein the closing panel portion has greater stiffness than the finishing portion. The method of claim 14,
Wherein the closed panel part is formed of a continuous fiber reinforced thermoplastic composite material and the finishing part is formed of polyethylene terephthalate (PET) or polypropylene. The method of claim 14,
Wherein the second resin is supplied in a state where the heated first resin has a temperature exceeding room temperature in the step of forming the reinforcing portion.

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