JP2012056356A - Structure for passenger vehicle interior and method of manufacturing the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a structure for a passenger vehicle interior having a vehicle interior constituting portion which can be formed efficiently and smoothly with desired strength and rigidity using a fiber reinforcing resin, attaining an excellent rigid structure for forming the vehicle interior in order to secure safety of occupants, and reducing manufacturing cost by facilitating molding to have excellent mass productivity, and to provide a method of manufacturing the same.SOLUTION: The structure for the passenger vehicle interior has a joint structure of shell structures divided into two in the longitudinal direction of a vehicle. The whole structure of each shell structure is integrally constituted by a fiber reinforcing resin. Both shell structures each have an opening facing each other. At the opening edge of each opening, a stiffener, which is extended at least partially in the extending direction of an opening edge, is integrally formed. Both shell structures are joined to each other by joining the stiffeners on the opening edges to each other. A manufacturing method of the same is also provided.

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a passenger compartment (excluding a racing car) compartment structure and a method for manufacturing the same, and more particularly to a passenger compartment structure suitable for an electric vehicle or a hybrid car and capable of being integrally formed substantially efficiently. The present invention relates to a body and a manufacturing method thereof.

  Electric vehicles, fuel cell vehicles, hybrid cars, etc. can use an electric motor as a power source for vehicle travel. Since the electric motor has a high degree of freedom in the vehicle mounting position, the degree of freedom in vehicle body design is greatly increased. To improve. Therefore, the shape and the degree of freedom of the structure of the passenger compartment skeleton structure for constituting the passenger compartment are greatly increased. Further, an automobile that can use an electric motor as a power source for running the vehicle has been attracting attention as a vehicle adapted to the global environment because it emits less carbon dioxide in total. In particular, the concept of LCA (Life Cycle Assessment) has been adopted in recent years, and the reduction of carbon dioxide emissions throughout the life from the vehicle manufacturing stage including materials to the use of the vehicle to the scrapped vehicle is being evaluated.

  On the other hand, for automobiles, the basic required specifications include a configuration to ensure the safety of passengers in the event of a collision, etc., a lighter body for improved fuel efficiency, and excellent mass productivity and reduced manufacturing costs. Etc. are required. As a structure for improving the safety of passengers, for example, a rigid structure that can suppress deformation as much as possible for the passenger compartment, which is the passenger's living space, and the vehicle front part and rear part connected to the passenger compartment structure part On the other hand, a flexible structure (also called a crushable structure) is used to effectively absorb impacts from the outside during collisions (such as front and rear collisions) and minimize the impact on the passenger compartment. The design philosophy that it is preferable is drawing attention.

  As a configuration for ensuring the safety of passengers in the event of a collision including the weight reduction of the vehicle body, for example, a structure in which the vehicle body skeleton portion is made of fiber reinforced resin has been proposed (for example, Patent Document 1). The structure disclosed in Patent Document 1 is formed by independently forming a vehicle body skeleton portion and a vehicle compartment portion constituting the lower portion of the vehicle body, and forming the vehicle body skeleton portion from a fiber reinforced composite material, and impact energy absorption performance in that portion. It is made to have.

  However, the structure disclosed in Patent Document 1 has a configuration in which the vehicle body frame portion and the vehicle compartment portion are independently formed, and thus there is a limit to improvement in productivity, particularly mass productivity. Therefore, it is not a particularly advantageous configuration for reducing the manufacturing cost. In addition, for the vehicle body skeleton located in the lower part of the vehicle compartment, structural contrivances for absorbing shock energy and the like are formed by using fiber reinforced composite material. However, there are no special considerations such as a rigid structure that can suppress deformation as much as possible to improve the safety of passengers. In other words, for passengers in the passenger compartment, although consideration has been given to ensuring safety by absorbing impact energy by the vehicle body skeleton, from the aspect of ensuring passenger safety by suppressing deformation of the passenger compartment, It cannot be said that the structure is fully considered.

JP 2010-23706 A

  As described above, a structure is known in which the features of the vehicle body skeleton (lower base part) located at the lower part of the passenger compartment are made use of the fiber reinforced resin. From the aspect of improving the performance, there is no known structure that comprehensively considers the entire portion including the passenger compartment component and the lower base portion. The vehicle interior component is basically required to have a structure capable of forming a closed space for the vehicle interior, but the structure capable of forming such a closed space is formed by molding using fiber reinforced resin. It is relatively difficult to smoothly remove the mold and the like, and in order to achieve this, usually a special device corresponding to the molding is required.

  Accordingly, an object of the present invention is to efficiently and smoothly form a vehicle compartment component using a fiber reinforced resin in a form having desired strength and rigidity. For this purpose, an electric motor is used as a power source. Based on a new concept based on the premise that the degree of freedom of vehicle body design in automobiles that can be used is also taken into account, an excellent rigid structure for vehicle compartment formation can be achieved to ensure passenger safety, and Another object of the present invention is to provide a passenger car compartment structure that can be easily molded, has excellent mass productivity, and can reduce manufacturing costs, and a method for manufacturing the same.

  In order to solve the above problems, a passenger car compartment structure according to the present invention is a structure for constituting a passenger compartment of a passenger car, and is a joint structure of a shell structure that is divided into two in the longitudinal direction of the vehicle. Each shell structure is integrally formed of a fiber reinforced resin, each shell structure has openings facing each other, and the opening edge of each opening is the opening edge. The stiffeners extending at least partially along the extending direction of the two are integrally formed, and the shell structures are joined to each other by joining the stiffeners of the opening edge to each other. Become. In the present invention, since it is difficult to apply to a so-called passenger car and a monocoque structure of a racing car having an extremely small opening for passenger getting on and off, it is excluded from the scope of the present invention.

  In such a passenger compartment structure according to the present invention, since the compartment structure has a joint structure of a shell structure made of fiber reinforced resin divided into two in the longitudinal direction of the vehicle, each shell structure Can be formed in a shape that is relatively easy to integrally form. Since the stiffeners formed at the opening edges of the opposing openings are bonded to each other, a sufficient bonding area can be secured at the bonding portion, and a sufficiently high bonding strength can be obtained. Therefore, the vehicle interior structure that has an integrated structure as a whole by this joining can have sufficiently high rigidity. In particular, since the joint portion is formed in an annular structure in which the stiffeners are joined together, it is possible to keep the vehicle interior in a very high rigid structure, particularly against vehicle rollover and side collision. As a result, the required rigid structure of the passenger compartment is achieved and the safety for the passenger is improved. Further, since the molding of each shell structure is facilitated, the manufacture of the entire vehicle interior structure is facilitated, the mass productivity is improved, and the manufacturing cost can be reduced. In addition, substantially the entire vehicle compartment structure is made of fiber reinforced resin, so that sufficient lightness is ensured. When at least a part of the entire structure is a sandwich structure using a fiber reinforced resin as a skin, a lighter weight and a rigid structure can be obtained. Furthermore, as described above, the degree of freedom of vehicle body design is greatly increased in an automobile that allows the use of an electric motor as a power source, and this advantage is the freedom of design of each shell structure, and thus the overall structure of the passenger compartment. Therefore, simplification of the structure, simplification of shape, facilitation of demolding at the time of molding, and the like can be achieved, and productivity and the like can be further improved. Furthermore, since it is possible to position the joint part between the stiffeners at a desired position in the vehicle front-rear direction, for example, if the joint part is set as a door hinge or lock attachment position, it is sufficiently high. It can be used as a mounting base with strength and rigidity.

  In the passenger vehicle compartment structure according to the present invention, at least one of the front shell structure and the rear shell structure has a small cross-sectional area toward the front or rear of the vehicle, as shown in an embodiment described later. Can be constructed in a structure having a semi-oval shape. In such a form, the draft of the mold when molding each shell structure can be easily set to an optimum condition, so that molding is further facilitated, and productivity, particularly mass productivity, is further improved. .

  In the passenger car compartment structure according to the present invention, at least one of the front shell structure and the rear shell structure has a closed shape within the range of the shell structure other than the opening. It can be set as the structure which has a shape opening part. Such a closed opening can be formed, for example, in an opening for a window or a door, and can be set substantially arbitrarily as required. In addition, since the opening has a closed shape within the range of each shell structure, it does not basically have a great influence on the above-described rigid structure of the passenger compartment.

  In the passenger vehicle compartment structure according to the present invention, at least one of the front shell structure and the rear shell structure is provided with a keel including a standing wall extending at least partially in the vehicle front-rear direction. A structure is also possible. One keel may be used, or two or more keels may be provided as necessary. If such a keel is provided, the strength and rigidity of at least the keel installation portion of each shell structure will be greatly improved. Therefore, the rigidity for achieving the required rigid structure of the passenger compartment as a whole structure for the passenger compartment can be ensured more easily and reliably.

  Further, in the passenger car compartment structure according to the present invention, it is possible to adopt a structure in which a rib extending in the width direction of the vehicle is provided on at least one of the front shell structure and the rear shell structure. is there. The ribs may partially extend in the structure width direction, but desirably extend substantially over the entire width (ie, between the side walls of the shell structure). Moreover, the rib may be provided over the perimeter of the shell structure. Also, this rib may be one or two or more if necessary. Further, the rib extending direction may be substantially the vehicle width direction of the shell structure, and may be a direction extending obliquely with respect to the orthogonal direction as well as a direction orthogonal to the front-rear direction. . If such a rib is provided, the torsional rigidity of the entire shell structure is improved, and the necessary rigid structure of the passenger compartment is more reliably achieved. In addition, if it is attached to the keel, the strength and rigidity of the shell structure are improved in the direction intersecting the keel, and in particular, the torsional rigidity of the entire vehicle compartment structure after joining the shell structures is improved. The required rigid structure is more reliably achieved. The stiffeners at the joints between the shell structures extend in the same direction as the ribs when viewed in plan, so the ribs are particularly at sites where the strength / rigidity improvement effect due to the joints between the stiffeners is thin. It is more effective if it is provided.

  The cross-sectional shape of the keel or rib itself is not particularly limited, and various cross-sectional shapes can be adopted. For example, various cross-sectional shapes such as an I shape, a T shape, an L shape, an inverted L shape, a Z shape, a C shape, and a hat shape can be adopted in addition to a simple flat wall shape and a horizontal wall shape. The keel and rib can be formed of metal, resin (including fiber reinforced resin), a sandwich structure using fiber reinforced resin as a skin, or the like.

  Further, in the passenger vehicle compartment structure according to the present invention, from the vehicle structure portion in which at least one of the front shell structure and the rear shell structure is disposed adjacent to the outside of the shell structure in the longitudinal direction of the vehicle. It is possible to have a structure that is configured in the support portion of the load to be transmitted. Since the passenger car compartment structure according to the present invention constitutes a main structural part of the passenger compartment, the front side of the passenger car compartment, that is, the front part of the vehicle, On the side, it is possible to arrange a rear part of the passenger compartment, that is, a rear part of the vehicle. Since loads such as impacts may be applied to the vehicle compartment structure due to front and rear collisions at these front and rear parts, the load at that time is received by the vehicle compartment structure having a rigid structure. It is made to be able to be done. As a result, the safety of passengers in the passenger compartment is more reliably ensured. At this time, if the front part and rear part of the vehicle are configured in a crushable structure, the load that is to be transmitted to the vehicle interior while appropriately absorbing the impact due to the collision by the crushable structure is applied to the vehicle. It is possible to realize an overall configuration ideal for ensuring the safety of passengers, which is to stop by the rigid structure of the room structure. Further, the front part and the rear part may have a structure for attaching drive system parts such as wheels, axles, and suspensions. In that case, the load related to the drive from these drive system components may be transmitted from the front part or the rear part to the vehicle compartment structure, and the load at that time is transferred to the vehicle compartment structure having a rigid structure. It is to be received. As a result, the function as a support structure for the drive system components can be taken in by the vehicle compartment structure, and the passenger vehicle vehicle compartment structure can be further reduced in manufacturing cost.

  In the present invention, the reinforcing fiber of the fiber reinforced resin used for the vehicle interior structure is not particularly limited, and carbon fiber, glass fiber, aramid fiber, etc. can be used, and a hybrid structure in which these reinforcing fibers are combined. Adoption is also possible. Further, the matrix resin of the fiber reinforced resin is not particularly limited, and either a thermosetting resin or a thermoplastic resin can be used. A typical example of the thermosetting resin that can be used is an epoxy resin. For molding in the case of using a thermosetting resin, it is possible to apply a molding method such as RTM (Resin Transfer Molding) or press molding using a prepreg. In the case of a thermoplastic resin, injection molding can be applied in addition to the above molding method. Usable thermoplastic resins include, for example, polyamide (nylon 6, nylon 66, etc.), polyolefin (polyethylene, polypropylene, etc.), polyester (polyethylene terephthalate, polybutylene terephthalate, etc.), polycarbonate, polyamideimide, polyphenylene sulfide, polyphenylene oxide. Polysulfone, polyethersulfone, polyetheretherketone, polyetherimide, polystyrene, ABS, liquid crystal polyester, a copolymer of acrylonitrile and styrene, and the like can be used. A mixture of these may also be used. Moreover, what was copolymerized like the copolymer nylon of nylon 6 and nylon 66 may be used. Furthermore, depending on the required properties of the molded product to be obtained, flame retardants, weather resistance improvers, other antioxidants, heat stabilizers, UV absorbers, plasticizers, lubricants, colorants, compatibilizers, conductive fillers, etc. It can be added.

  In the method for manufacturing a passenger compartment structure according to the present invention, the shell structure divided into two parts of the passenger compartment structure as described above is integrally formed with a fiber reinforced resin, and then both molded parts are formed. It consists of the method characterized by integrating the whole structure for vehicle interiors by joining the stiffeners formed in the opening edge of the opening part of the shell structure. By joining the stiffeners, it is possible to ensure a sufficient joint area and joint strength as described above, achieve the desired rigid structure of the passenger compartment, and join the flat surfaces together. This facilitates the manufacture of the vehicle interior structure. In addition, you may form at least a pair of fitting structure in the opening edge of the opening part of a front side shell structure and a rear side shell structure. By doing so, it is possible to further improve the bonding strength, and further facilitate positioning during the bonding assembly of the front shell structure and the rear shell structure. In addition, since each shell structure has a divided structure, it is possible to easily set a desired draft angle and the like, and since each shell structure is integrally formed, the shell structure Excellent productivity can be obtained even at the molding stage.

  Moreover, in the method for manufacturing a passenger car compartment structure according to the present invention, each shell structure can be formed by one-shot molding in which all parts are formed substantially simultaneously. In other words, all parts of each shell structure to be molded are molded at the same time (for example, in the same mold) at the same time, and the target shell structure is extremely It will be molded efficiently and in a short time.

  For each shell structure, by setting the draft angle of the mold along the opening direction of the opening, it becomes possible to remove the mold more easily, resulting in higher productivity. It is done.

  Furthermore, in the method for manufacturing a passenger compartment structure according to the present invention, each shell structure can be formed using a forming die and a placement element. In particular, in the case of a shell structure having an inner surface portion that cannot be reached only by the molding die, for example, the molding die is inserted from the opening of the shell structure described above, and a placement element is not provided for the portion that cannot reach the molding die. To form a predetermined molding shape, and in that state, for example, a reinforced fiber-containing thermoplastic resin is injected between the molding die composed of the lower die and the upper die and the placement die. After cooling and solidifying, the mold as the upper mold is removed, and the placement element is removed from the vacant space, whereby predetermined integral molding and one-shot molding are possible. Instead of injection molding, press molding using RTM molding or prepreg is also possible. An elastic body, a bag-like body filled with particles, or a balloon-like body that can be inflated and contracted (for example, a rubber balloon-like body) can be used as the above-mentioned placement element. Moreover, it is also possible to use what is extended circularly as a placement element, and to arrange | position it around a shaping | molding die. Further, if a convex mold that protrudes toward the molded body is used as the upper mold or the placement element, it becomes possible to facilitate the prepreg lamination thereon.

  As described above, according to the passenger car compartment structure and the manufacturing method thereof according to the present invention, the stiffeners of the front and rear split shell structures integrally formed with the fiber reinforced resin are joined to each other for the passenger compartment having an integral structure as a whole. By adopting a structure, it is possible to easily and reliably form a rigid structure of the passenger compartment that ensures the safety of passengers, and it is also excellent in weight and mass productivity. Can be obtained at low cost.

It is a disassembled perspective view of the structure for passenger car compartments which concerns on one embodiment of this invention. It is a decomposition | disassembly side view at the time of providing an opening part further in the structure for vehicle interiors of FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is an exploded perspective view of a passenger car compartment structure according to an embodiment of the present invention. The passenger compartment structure 1 is a structure for constituting a passenger compartment of a passenger car. After the construction of the passenger compartment 1, the entire structure from the front side to the rear side of the passenger compartment is It is configured as a structure integrally formed of fiber reinforced resin (for example, carbon fiber reinforced resin). The vehicle interior structure 1 has a joining structure of half-oval shell structures 2 and 2 divided into two in the vehicle front-rear direction (arrow direction). Each shell structure 2 and 3 is a structure. The whole is integrally formed of a fiber reinforced resin, and in this embodiment, it is integrally formed, particularly one-shot. By the integral molding, particularly the one-shot molding, the shell structures 2 and 3 have excellent moldability and productivity. Moreover, favorable lightweight property is ensured because the whole structure is comprised with a fiber reinforced resin. Both shell structures 2 and 3 have openings 4 and 5 that face each other. A stiffener extending at least partially along the extending direction of the opening edge (in the illustrated example, extending in an annular shape over the entire circumference along the extending direction of the opening edge) 6 and 7 are formed integrally with the shell structures 2 and 3. Each of the stiffeners 6 and 7 has a flat surface extending in an annular shape opposite to each other, and the stiffeners 6 and 7 formed at the opening edges are bonded to each other, in particular by joining the flat surfaces to each other. The structures 2 and 3 are firmly joined to each other with a wide joining area, and the passenger car compartment structure 1 having a monolithic structure is completed. Further, since the half-oval shell structures 2 and 3 have openings 4 and 5 as shown in the drawing, the draft angle of the mold can be easily secured, and the shell structures 2 and 3 can be easily molded. It has become. The shell structure 2 is provided with a closed shape opening 8 that forms a closed shape within the range of the shell structure 2. In this embodiment, the shell structure 2 is formed as an opening for a window on the front surface of the vehicle. ing.

  Since the stiffeners 6 and 7 are joined between flat surfaces, a sufficiently large joining area and a sufficiently high joining strength can be obtained, and the strength and rigidity of the integral structure 1 for a passenger compartment can be obtained. Is obtained. The stiffeners 6 and 7 joined to each other constitute an annular stiffener structure extending over the entire circumference of the vehicle interior after the configuration of the vehicle interior structure 1. Can be configured. In particular, when the vehicle rolls over or when an impact load is applied to the side part from the outside in the event of a side collision, the stiffener structure that extends in a hoop shape will exert a very high deformation restraining force. Is improved. In addition, since the integrally formed half-oval shell structures 2 and 3 can exhibit a high reaction force against an impact load or the like from the front and rear of the vehicle, the vehicle interior structure 1 can be used in front and rear collisions. In contrast, high strength and rigidity can be expressed, and passenger safety is further ensured. Therefore, if the crushable structure portion is disposed adjacent to the front and rear of the vehicle interior structure 1, the impact energy is absorbed by the crushable structure portion in the case of a front collision or a rear collision, and a vehicle with an impact load is absorbed. Transmission to the interior can be stopped by the rigid structure 1 for the passenger compartment, and an ideal overall configuration can be realized for ensuring the safety of passengers in the passenger compartment.

  FIG. 2 is an exploded side view in the case where another opening is provided in the passenger compartment structure having the same form as the passenger compartment structure of FIG. A passenger vehicle compartment structure 11 shown in FIG. 2 has a joined structure of half-oval shell structures 12 and 13 that are divided into two in the vehicle front-rear direction (arrow direction). The entire structure is integrally formed with a fiber reinforced resin (for example, carbon fiber reinforced resin), and the shell structures 12 and 13 have excellent moldability and productivity. Both shell structures 12 and 13 have openings 14 and 15 that face each other. A stiffener extending at least partially along the extending direction of the opening edge (in the illustrated example, extending in an annular shape over the entire circumference along the extending direction of the opening edge) 16 and 17 are formed integrally with the shell structures 12 and 13. Each of the stiffeners 16 and 17 has a flat surface extending in an annular shape opposite to each other, and the stiffeners 16 and 17 formed at the opening edges are bonded to each other, in particular by joining the flat surfaces to each other. The structures 12 and 13 are firmly joined to each other with a wide joining area, and the passenger car compartment structure 11 having an integral structure is completed. Further, since the semi-egg-shaped shell structures 12 and 13 have the openings 14 and 15, the draft angle of the mold can be easily secured, and the molding of the shell structures 12 and 13 is facilitated. . The front shell structure 12 is provided with closed shape openings 18 and 19 that form a closed shape within the range of the shell structure 12, and the closed shape opening 18 is an opening for a window on the front surface of the vehicle. The closed-shaped opening 19 is formed as a door opening. Further, the rear shell structure 13 is provided with closed shape openings 20, 21 that form a closed shape within the range of the shell structure 13, and the closed shape opening 20 is used for a window on the rear surface of the vehicle. As the opening portion, the closed shape opening portion 21 is formed as an opening portion for the vehicle rear side surface.

  Even in such a configuration, high strength and rigidity can be obtained as an integral structure 11 for the passenger compartment by joining the stiffeners 16 and 17 while ensuring good light weight as a whole structure. A high rigid structure can be constructed, and passenger safety is improved. Moreover, the integrally formed half-oval shell structures 12 and 13 can also exhibit high strength and rigidity, respectively, and can also exhibit high strength and rigidity as the vehicle interior structure 11, so that passenger safety is improved. It is ensured even better. Further, by providing a plurality of closed openings 18, 19, 20, and 21 in the passenger compartment structure 11, there is a need for the passenger compartment without greatly reducing the strength and rigidity of the passenger compartment structure 11 as a whole. The functions to be performed can be satisfied as needed.

  In the present invention, as will be described with reference to FIG. 2, keels 22 and 23 made of standing walls extending in the vehicle front-rear direction can be provided on the inner surface side of the shell structures 12 and 13. . Further, ribs 24 and 25 can be provided in the vehicle width direction. Such keels 22, 23 and ribs 24, 25 can be integrally formed with the shell structures 12, 13, and can be joined after forming. By installing such keels 22, 23 and ribs 24, 25, the strength and rigidity of the shell structures 12, 13, and the passenger car compartment structure 11 as a whole are further improved.

  The passenger car compartment structure and the manufacturing method thereof according to the present invention are particularly suitable for an electric vehicle, a fuel cell vehicle, a hybrid car, and the like having a high degree of freedom in the mounting position of a vehicle driving power source.

DESCRIPTION OF SYMBOLS 1,11 Passenger vehicle compartment structure 2, 12 Front shell structure 3, 13 Rear shell structure 4, 5, Opening 6, 7, 16, 17 Stiffener 7 Structure opening 8, 18, 19, 20, 21 Closed shape opening 22, 23 Keel 24, 25 Rib

Claims (9)

  A structure for constituting a passenger compartment of a passenger car, having a joint structure of a shell structure divided into two in the front-rear direction of the vehicle, and each shell structure is integrally formed with fiber reinforced resin. Both shell structures have openings opposite to each other, and an opening edge of each opening is integrally formed with a stiffener extending at least partially along the extending direction of the opening edge. A structure for a passenger compartment of a passenger car characterized in that both shell structures are joined to each other by joining the stiffeners at the opening edges.   2. The passenger car compartment structure according to claim 1, wherein at least one of the front shell structure and the rear shell structure has a semi-oval portion whose cross-sectional area decreases toward the front or rear of the vehicle.   The passenger vehicle according to claim 1 or 2, wherein at least one of the front shell structure and the rear shell structure has a closed opening having a closed shape within a range of the shell structure other than the opening. Room structure.   The passenger car compartment according to any one of claims 1 to 3, wherein at least one of the front shell structure and the rear shell structure is provided with a keel comprising a standing wall extending at least partially in the vehicle front-rear direction. Structure.   The passenger car compartment structure according to any one of claims 1 to 4, wherein a rib extending in a vehicle width direction is provided on at least one of the front shell structure and the rear shell structure.   2. At least one of the front shell structure and the rear shell structure is configured as a support portion for a load transmitted from a vehicle structure portion disposed adjacent to the outside of the shell structure in the longitudinal direction of the vehicle. The structure for passenger car compartments in any one of -5.   7. The shell structure divided into two parts of the passenger car compartment structure according to any one of claims 1 to 6 is integrally formed with a fiber reinforced resin, and then the openings of the openings of both shell structures formed are formed. A method for manufacturing a passenger vehicle compartment structure, wherein the stiffeners formed at the edges are joined together to integrate the entire vehicle compartment structure.   The method for manufacturing a passenger car compartment structure according to claim 7, wherein each shell structure is formed by one-shot molding in which all parts are formed substantially simultaneously.   The method for manufacturing a passenger car compartment structure according to claim 7 or 8, wherein a draft of the molding die is set along the opening direction of each shell structure.

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