JP5703638B2 - Auxiliary structure for vehicle compartment - Google Patents

Description

  The present invention relates to an auxiliary structure that supplements and reinforces the structure of a passenger compartment of a vehicle typified by a passenger car, and more particularly to an auxiliary structure for a vehicle passenger compartment that can easily and greatly improve the protection performance of passengers in the passenger compartment. .

  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 or rollover, a lighter body for improved fuel efficiency, and excellent mass productivity. And manufacturing cost reduction is required. As a structure for improving occupant safety, for example, it is basically required to have a rigid structure capable of suppressing deformation as much as possible for the passenger compartment that is the occupant's living space. There is a need for a design that minimizes the impact of external impact loads on the passenger compartment during rear impacts and side impacts) and rollovers.

  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, structural improvements for impact energy absorption and the like have been added to the vehicle body skeleton located in the lower part of the passenger compartment, but for the passenger compartment, the safety of passengers has been improved. Therefore, the device such as a rigid structure that can suppress deformation as much as possible is not particularly considered. In other words, for passengers in the passenger compartment, safety is ensured by absorbing impact energy by the vehicle body skeleton, but the passenger's passengers are prevented by suppressing deformation of the passenger compartment and transmitting load from the outside to the passenger compartment. From the aspect of ensuring safety, it cannot be said that the structure is fully considered. In addition, when trying to reinforce the passenger compartment components in a normal metal vehicle body, it takes a lot of time to assemble the reinforcing parts and join them by welding, etc., and continuity by molding such as fiber reinforced resin is expected. Because it is not possible, it is difficult to reduce the weight.

JP 2010-23706 A

  As described in Patent Document 1, a structure is known in which a fiber reinforced composite material is used for a vehicle body skeleton part (lower base part) located at a lower part of a vehicle compartment part. From the aspect of improving the safety of passengers in the vehicle, we tried to reinforce the basic structure of the passenger compartment by using a fiber reinforced resin that is particularly lightweight and moldable. The structure is unknown.

  Accordingly, the object of the present invention is to reinforce the desired reinforcement of the entire vehicle compartment using a fiber reinforced resin that is particularly lightweight and excellent in moldability, and at the same time, enables a desirable structural replenishment. Based on a new concept based on the premise of taking into account the increase in the degree of freedom of vehicle body design in automobiles that can use motors, it is possible to easily ensure the safety of passengers as the first design consideration. In addition, an object of the present invention is to provide an auxiliary structure for a vehicle compartment that can achieve excellent mass productivity and reduction in manufacturing cost.

In order to solve the above problems, an auxiliary structure for a vehicle compartment according to the present invention is joined to a compartment structure for constituting a compartment of a vehicle, and supplements and reinforces the structure of the compartment. And having at least a main opening that opens in the vehicle front-rear direction and extends across the entire cross section of the passenger compartment, and has an annular wall that extends continuously around the main opening. A connecting wall connected to the wall and connected to the vehicle casing structure extending in the vehicle longitudinal direction from the annular wall; the entire structural component is integrally formed of fiber reinforced resin ; and It comprises a rear side auxiliary structure joined to the rear side of the structure .

  In such an auxiliary structure for a vehicle compartment according to the present invention, the auxiliary structure that reinforces the structure of the compartment has an annular wall that extends continuously around the main opening in an annular shape, For example, since it can be arranged in a hoop shape so as to surround the vehicle cabin over the entire circumference in the vehicle longitudinal direction central portion in the vehicle cabin, especially when the vehicle rolls over, the annular wall allows the vehicle to enter the vehicle cabin. The transmission of the external load can be appropriately suppressed, and the safety of the passenger can be appropriately ensured. Further, in the case of a side collision or the like, the annular wall appropriately suppresses the transmission of the external load to the vehicle interior, so that the safety of the passenger can be appropriately ensured similarly. Since this annular wall is formed in an annular shape around the main opening that extends over the entire cross section of the passenger compartment, it is basically not an obstacle to the formation of the passenger compartment as a living space, and can be easily performed. Can be installed. Further, since the auxiliary structure provided with the annular wall is joined to the passenger compartment structure, the fixing strength for the passenger compartment and hence the entire vehicle can be easily secured sufficiently high. And since the whole component part of the auxiliary structure including the annular wall and the joining wall is integrally formed of fiber reinforced resin, in addition to ensuring light weight, the auxiliary structure as a whole has sufficient strength and rigidity. In addition, if it is formed integrally, it is possible to improve productivity, particularly excellent mass productivity, and reduce manufacturing costs at the same time, especially if it is formed by one-shot molding that simultaneously molds each part. Further, as described above, since the degree of freedom of vehicle body design is greatly increased in an automobile that can use an electric motor as a power source, this advantage can be reflected in the degree of freedom of design of the auxiliary structure. As a result, it is possible to efficiently replenish and reinforce the desired cabin structure with an auxiliary structure with a simple shape, and it is possible to easily remove the mold when forming the auxiliary structure. It is also possible to improve the property.

In a vehicle cabin auxiliary structure according to the present invention, the auxiliary structure can be configured as a rear-side auxiliary structure which is bonded to the rear side of the compartment structure as described above, ( 1) It can also be configured as a front side auxiliary structure joined to the front side of the passenger compartment structure. (2) A rear side auxiliary structure and front part joined to the rear side of the passenger compartment structure. It can also be configured to include both front side auxiliary structures joined to the side. In the case of (1), it is an auxiliary structure that is joined to the vehicle compartment structure for constituting the vehicle compartment of the vehicle and supplements and reinforces the structure of the vehicle compartment, at least in the direction toward the vehicle longitudinal direction. A main opening that is open and extends across the entire cross section of the passenger compartment, has an annular wall that extends continuously around the main opening, and is connected to the annular wall and extends in the vehicle front-rear direction from the annular wall The front side which has a joining wall with the above-mentioned compartment structure, the whole of these structural parts are constituted integrally with fiber reinforced resin, and is joined to the front part side of the above-mentioned compartment structure An auxiliary structure for a vehicle compartment characterized by including an auxiliary structure, and in the case of (2), the structure of the compartment is supplemented by being joined to the compartment structure for constituting the vehicle compartment of the vehicle.・ Auxiliary structure to reinforce, which is opened at least in the direction toward the vehicle longitudinal direction The vehicle compartment having a main opening extending over the entire cross section of the chamber, having an annular wall extending annularly and continuously around the main opening, and being connected to the annular wall and extending in the vehicle longitudinal direction from the annular wall A rear wall side auxiliary structure and a front side which are joined to the rear side of the vehicle compartment structure, and which have a joint wall with the structure body, the whole structure part is integrally formed of fiber reinforced resin, and A vehicle compartment auxiliary structure including a front side auxiliary structure joined to the side of the vehicle .

  In the case where the auxiliary structure is configured as a rear side auxiliary structure joined to the rear side of the vehicle compartment structure, the rear side auxiliary structure faces the rear side from the annular wall. It is preferable to constitute a structure having a curved wall (for example, a curved wall extending in a semicircular shape) that is curved and extends along the shape. In this case, it is possible to adopt a structure in which openings are formed on both sides of the curved wall in the vehicle width direction, so that there is a wall part necessary for reinforcement, but the wall part is reduced as much as possible and is lightweight and simple. A simple structure can be achieved. In addition, considering integral molding, if multiple openings in different directions are formed in addition to the main opening, it will be possible to facilitate demolding and make manufacturing easier. Is done.

  In the present invention, the structure of the passenger compartment structure is not particularly limited. For example, when the passenger compartment structure is provided with a keel that is a reinforcing standing wall extending in the vehicle front-rear direction, the curved wall is the keel. It is possible to adopt a configuration in which the auxiliary structure and the passenger compartment structure are further strengthened, thereby increasing the strength and rigidity of the vehicle including the passenger compartment structure. It can be configured as an integrated structure.

  Further, when the auxiliary structure is configured as a front side auxiliary structure joined to the front side of the vehicle compartment structure, the front side auxiliary structure is arranged in the width direction. It is preferable to have a transverse wall extending transversely. Such a transverse wall can improve the rigidity of the entire auxiliary structure, improve the bonding strength with the passenger compartment structure, and further, for example, fulfill the function of reinforcing the passenger compartment structure in the vicinity of the instrument panel. Is possible.

  Further, when the auxiliary structure includes both the rear side auxiliary structure joined to the rear side of the passenger compartment structure and the front side auxiliary structure joined to the front side, the rear side auxiliary structure The body and the annular wall of the front side auxiliary structure can be integrally connected by a connecting wall extending in the vehicle front-rear direction. In the structure provided with such a connecting wall, the vehicle compartment reinforcing function by the annular wall of the front and rear auxiliary structure can be further reinforced by adding the connecting wall. For example, the connecting wall can be a wing type. It can also be configured as a door hinge mounting portion, and can also be provided with a supplementary function of the additional structure portion required for the vehicle cabin structure.

Further, in any type of auxiliary structure, in the vehicle casing auxiliary structure according to the present invention, the annular wall is a hinge mounting portion of a door (a normal type door, not a wing type). It is possible to make the structure which comprises. That is, an auxiliary structure that is joined to a passenger compartment structure for constituting a passenger compartment of a vehicle and supplements and reinforces the passenger compartment structure, and is opened at least in a direction toward the vehicle front-rear direction and crosses the passenger compartment. A vehicle body structure having a main opening extending over the entire surface, an annular wall continuously extending in an annular shape around the main opening, and being connected to the annular wall and extending in the vehicle front-rear direction from the annular wall; The vehicle is characterized in that all of the structural component parts are integrally formed of a fiber reinforced resin, and the annular wall constitutes a hinge mounting portion of a door. This is an auxiliary structure for a room. Even in such a structure, it is possible to cause the annular wall to have a supplementary function of the additional structure portion required for the vehicle compartment structure. Further, in the case of an open car type vehicle, particularly when including a front side auxiliary structure, a part of the auxiliary structure, in particular, the upper side portion of the annular wall can also function as a window frame. is there.

  Further, in the present invention, the configuration of the vehicle compartment structure is not particularly limited, but when the vehicle compartment structure is also integrally formed of fiber reinforced resin, it is joined to the auxiliary structure made of fiber reinforced resin. As a result, the productivity is further improved and the bonding strength can be improved. The vehicle interior structure may be substantially configured integrally as a whole, or may be of a type in which divided portions are joined.

  In the present invention, the fiber reinforced resin reinforced fiber used in the auxiliary structure or the passenger compartment structure is not particularly limited, and carbon fiber, glass fiber, aramid fiber, and the like can be used. It is also possible to adopt a combined hybrid configuration. 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.

  As described above, according to the auxiliary structure for a vehicle compartment according to the present invention, the desired reinforcement of the entire vehicle compartment is efficiently performed by the integrally constructed auxiliary structure made of fiber reinforced resin having excellent lightness and moldability. In particular, it is possible to easily and reliably form an excellent rigid structure for ensuring the safety of passengers against rollovers and side collisions. In addition, functions required for the passenger compartment structure can be easily added and supplemented to the auxiliary structure as required. Furthermore, since the auxiliary structure for vehicle compartment according to the present invention is excellent in manufacturing and assembling properties and is excellent in mass productivity, it can be manufactured at low cost.

It is a schematic longitudinal cross-sectional view of the state which built the auxiliary structure for vehicle compartments which concerns on one embodiment of this invention in the compartment structure. It is a perspective view of the auxiliary structure of FIG. It is a schematic longitudinal cross-sectional view of the state which built the auxiliary structure for vehicle compartments which concerns on another embodiment of this invention in the compartment structure. It is a perspective view which shows the example of the auxiliary structure of FIG. It is a schematic longitudinal cross-sectional view of the state which integrated the auxiliary structure for vehicle compartments which concerns on another embodiment of this invention in the compartment structure. It is a perspective view of the auxiliary structure of FIG.

Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 shows a state where an auxiliary structure for a vehicle compartment according to an embodiment of the present invention is incorporated in the compartment structure. In FIG. 1, reference numeral 1 denotes a passenger compartment structure for constituting a passenger compartment of a vehicle, particularly a passenger compartment structure constituting a portion excluding a roof portion. In the present embodiment, the auxiliary structure 2 for a vehicle compartment according to an embodiment of the present invention is incorporated on the rear side (in the direction of the arrow) from the inside, and the structure of the compartment is joined to the compartment structure 1. Replenished and reinforced. As shown in FIG. 2, the auxiliary structure 2 has a main opening 3 that opens toward the front side of the vehicle and extends over the entire cross section of the passenger compartment, and is continuous in an annular shape around the main opening 3. And an annular wall 4 extending in the vertical direction. The auxiliary structure 2 includes a curved wall 5 that is connected to the annular wall 4 and extends in a semicircular shape along the shape of the passenger compartment structure 1 from the annular wall 4 toward the vehicle rear side. The curved wall 5 and the lower wall 6 connected to the lower side of the annular wall 4, and the lower side portion of the annular wall 4 constitute a joining wall 7 with the vehicle compartment structure 1. The entire constituent parts of the auxiliary structure 2 shown in FIG. 2 are integrally formed of a fiber reinforced resin (for example, a carbon fiber reinforced resin). In this embodiment, the components are integrally formed, in particular, each part is formed substantially simultaneously. Molded by blow molding.

  Openings 8 and 9 are formed on both sides of the curved wall 5 in the vehicle width direction, and an enlarged portion 10 having an enlarged area is formed at the rear end of the curved wall 5. As shown in FIG. 1, when the keel 11 that is a reinforcing standing wall extending in the vehicle front-rear direction is provided in the vehicle compartment structure 1, it is preferable that the curved wall 5 is integrally joined to the keel 11. It is preferable that the enlarged portion 10 is firmly joined to the keel 11.

  In such a configuration according to this embodiment, the annular wall 4 continuously extending in an annular shape around the main opening 3 enables a desirable rigid structure of the passenger compartment, and transmission of an external load to the passenger compartment. For example, it becomes possible to appropriately suppress the impact load from the outside at the time of rollover or side collision, and the safety of the occupant can be ensured appropriately. Since the annular wall 5 is integrally joined to the passenger compartment structure 1 together with the joining wall 7, the fixing strength for the passenger compartment and thus the entire vehicle is easily secured sufficiently high. And since the whole auxiliary structure 2 including this annular wall 4 and the joining wall 7 is integrally molded with the fiber reinforced resin, it is possible to secure light weight and sufficient strength and rigidity as the whole auxiliary structure 2. In addition, it is possible to achieve excellent mass productivity and reduction in manufacturing cost simultaneously by integral molding, particularly by one-shot molding in which the respective parts are simultaneously molded. Further, by forming the openings 8 and 9 on both sides of the curved wall 5 in addition to the main opening 3, it is possible to easily attach and detach the molding die, and the integral molding is facilitated. The Furthermore, when the keel 11 is provided in the vehicle interior structure 1, the curved wall 5 is integrally joined to the keel 11, so that not only the curved wall 5 and the annular wall 4 but also the joined structure as a whole is strong.・ Improved rigidity. Furthermore, it is also possible to give the annular wall 4 the function of a door hinge mounting portion, and other functions required for the passenger compartment structure portion can be easily added while having a simple structure.

  FIG. 3 shows a case where an auxiliary structure 21 for a vehicle compartment according to another embodiment of the present invention is incorporated on the front side in the vehicle longitudinal direction of the compartment structure 1. As shown in FIG. 4, the front side auxiliary structure 21 can adopt various auxiliary structures 21 a, 21 b, and 21 c. In these front side auxiliary structures 21, 21a, 21b, and 21c, annular walls 23, 23a, 23b, and 23c that extend continuously around the main openings 22, 22a, 22b, and 22c and extend in the vertical direction are also provided. Bonding walls 24, 24 a, 24 b, 24 c formed with the casing structure 1 connected to the annular wall 24 are provided. Further, these front side auxiliary structures 21, 21a, 21b, 21c have transverse walls 25, 25a, 25b, 25c extending across the vehicle compartment structure 1 in the width direction. Moreover, as shown in FIG. 4 (A), the rib wall 26 can also be provided as needed. The entire constituent parts of these auxiliary structures 21, 21a, 21b, and 21c are integrally formed of a fiber reinforced resin (for example, carbon fiber reinforced resin). Molded by one-shot molding.

  In the configuration according to this embodiment, like the above-described embodiment, the annular walls 23, 23a, 23b, and 23c enable the configuration of a desirable rigid structure of the passenger compartment, and the transmission of an external load to the passenger compartment. For example, it becomes possible to appropriately suppress the impact load from the outside at the time of rollover or side collision, and the safety of the occupant can be ensured appropriately. Further, by integrally joining the auxiliary structures 21, 21a, 21b, and 21c to the vehicle interior structure 1, the fixing strength for the vehicle interior, and thus the entire vehicle, is easily secured sufficiently high. And since the whole auxiliary structure 21, 21a, 21b, 21c is integrally formed with fiber reinforced resin, it is possible to secure light weight and sufficient strength as the whole auxiliary structure 21, 21a, 21b, 21c, Rigidity can be easily set, and further, it is possible to simultaneously achieve excellent mass productivity and reduction in manufacturing cost by integral molding, particularly by one-shot molding that simultaneously molds each part. Further, in this embodiment, the annular walls 23, 23a, 23b, 23c of the front side auxiliary structures 21, 21a, 21b, 21c have a window frame function (particularly, a window frame function in an open car type vehicle). Furthermore, the cross walls 25, 25a, 25b, 25c can be provided with a reinforcing function in the vicinity of the instrument panel in the passenger compartment, and the structure for the required function can be simplified. Can be replenished.

  FIG. 5 shows still another embodiment of the present invention. The rear side auxiliary structure 31 joined to the rear side of the vehicle interior structure 1 and the front side auxiliary structure 32 joined to the front side. In this embodiment, the connection between the annular walls 33 and 34 of the rear side auxiliary structure 31 and the front side auxiliary structure 32 extends in the vehicle front-rear direction as shown in FIG. The walls 35 are integrally connected. By providing such a connecting wall 35, the annular wall 33, 34 can be further reinforced, and the vehicle compartment reinforcing function can be further improved. Moreover, if this connection wall 35 is utilized for the hinge attachment part of a wing type door, it will become possible to supplement easily the additional structure part which satisfy | fills another required function. The connecting wall 35 can be formed integrally with the rear side auxiliary structure 31 and the front side auxiliary structure 32, and is formed integrally with the rear side auxiliary structure 31 or the front side auxiliary structure 32. It is also possible to join the other auxiliary structure after the molding, and the rear side auxiliary structure 31 and the front side auxiliary structure 32 are molded separately from each other, after assembling both auxiliary structures, etc. It is also possible to join both auxiliary structures.

  The vehicle compartment auxiliary structure according to the present invention can be applied to any vehicle having a vehicle compartment structure in which the auxiliary structure can be incorporated, and in particular, an electric device having a high degree of freedom in the mounting position of the vehicle driving power source. It is suitable for automobiles, fuel cell vehicles, hybrid cars and the like.

1 Vehicle compartment structure 2, 21, 21a, 21b, 21c, 31, 32 Vehicle vehicle compartment auxiliary structure 3, 22, 22a, 22b, 22c Main opening 4, 23, 23a, 23b, 23c, 33, 34 Annular wall 5 Curved wall 6, 7, 24, 24a, 24b, 24c Joint wall 8, 9 Opening part 10 Enlarged part 11 Keel 25, 25a, 25b, 25c Crossing wall 26 Rib wall 35 Connecting wall

Claims (12)

An auxiliary structure that is joined to a passenger compartment structure for constituting a passenger compartment of a vehicle and supplements and reinforces the passenger compartment structure, and is opened at least in a direction toward the vehicle front-rear direction and has an entire transverse section of the passenger compartment. A main opening extending across the main opening, an annular wall continuously extending in an annular shape around the main opening, and joining to the vehicle compartment structure connected to the annular wall and extending in the vehicle front-rear direction from the annular wall It has a wall, all of these structural components are integrally formed of fiber reinforced resin , and include a rear side auxiliary structure joined to the rear side of the vehicle compartment structure. Auxiliary structure for vehicle compartment. The auxiliary structure for a vehicle compartment according to claim 1 , wherein the rear side auxiliary structure has a curved wall extending from the annular wall toward the rear side along the shape of the compartment structure. The auxiliary structure for a vehicle compartment according to claim 2 , wherein openings are formed on both sides of the curved wall in the vehicle width direction. And keel are reinforced standing wall which extends in the vehicle longitudinal direction is provided in the casing structure, said curved wall is joined to the keel integral with the vehicle cabin according to claim 2 or 3 ancillary structure body. An auxiliary structure that is joined to a passenger compartment structure for constituting a passenger compartment of a vehicle and supplements and reinforces the passenger compartment structure, and is opened at least in a direction toward the vehicle front-rear direction and has an entire transverse section of the passenger compartment. A main opening extending across the main opening, an annular wall continuously extending in an annular shape around the main opening, and joining to the vehicle compartment structure connected to the annular wall and extending in the vehicle front-rear direction from the annular wall has a wall, the whole of these structures component is configured integrally with the fiber-reinforced resin, and comprising a front side auxiliary structure to be joined to the front side of the casing structure An auxiliary structure for a vehicle compartment. The said front part side auxiliary structure is an auxiliary structure for vehicle compartments of Claim 5 which has the cross wall extended across the said compartment structure body in the width direction. An auxiliary structure that is joined to a passenger compartment structure for constituting a passenger compartment of a vehicle and supplements and reinforces the passenger compartment structure, and is opened at least in a direction toward the vehicle front-rear direction and has an entire transverse section of the passenger compartment. A main opening extending across the main opening, an annular wall continuously extending in an annular shape around the main opening, and joining to the vehicle compartment structure connected to the annular wall and extending in the vehicle front-rear direction from the annular wall These structural structural parts have a wall and are integrally formed of fiber reinforced resin, and are joined to the rear side auxiliary structure joined to the rear side of the vehicle compartment structure and the front side. An auxiliary structure for a vehicle compartment, comprising a front side auxiliary structure. The auxiliary structure for a vehicle compartment according to claim 7 , wherein an annular wall between the rear side auxiliary structure and the front side auxiliary structure is integrally connected by a connecting wall extending in the vehicle front-rear direction. The auxiliary structure for a vehicle compartment according to claim 8 , wherein the connecting wall constitutes a hinge mounting portion of a wing type door. The auxiliary structure for a vehicle compartment according to any one of claims 1 to 8 , wherein the annular wall constitutes a hinge attachment portion of a door. An auxiliary structure that is joined to a passenger compartment structure for constituting a passenger compartment of a vehicle and supplements and reinforces the passenger compartment structure, and is opened at least in a direction toward the vehicle front-rear direction and has an entire transverse section of the passenger compartment. A main opening extending across the main opening, an annular wall continuously extending in an annular shape around the main opening, and joining to the vehicle compartment structure connected to the annular wall and extending in the vehicle front-rear direction from the annular wall A vehicle compartment characterized in that it has a wall, all of these structural components are integrally formed of fiber reinforced resin, and the annular wall constitutes a hinge mounting portion of a door Auxiliary structure.   The auxiliary structure for a vehicle compartment according to any one of claims 1 to 11, wherein the compartment structure is integrally formed of a fiber reinforced resin.

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