JP2011037313A - Automobile having space frame structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a body for automobile, which uses an FRP pipe which is inexpensive, lightweight, highly rigid, and highly strong in an automobile having a space frame structure, and to provide a structure in which the entire frame is conducted while the strength is not degraded even during the heat inflation caused by the temperature change. <P>SOLUTION: A space frame structure constituted of an FRP pipe 2 is constructed inside a body 1. The amount of fibers in the longitudinal direction is larger than that of fibers in the circumferential direction in the FRP pipe directed in the automobile advancing direction. The FRP pipe installed in the direction orthogonal to the automobile advancing direction and horizontal to the traveling surface is formed of fibers directed at 45° with respect to the longitudinal direction. Conductive lines are passed through each FRP pipes, and are electrically contacted with metallic fastening members 3 for fastening each FRP pipe. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an automobile having a space frame structure.

  Fiber reinforced plastic (hereinafter referred to as “FRP”) has high strength and rigidity against specific gravity. Therefore, to reduce weight and increase rigidity, high-speed moving bodies such as aircraft and racing cars, and rotating bodies such as wind turbines for wind power generation Often used for. The application of FRP to automobiles is almost only used for mass-produced cars, because carbon fiber reinforced epoxy resin laminates are used for the bodies of some high-class sports cars as described in Non-Patent Document 1. It has not been. The main reasons for this are that a large mold is required for molding FRP, that it takes time to heat mold the resin, and that a method for fastening FRP and metal parts has not been established.

  In particular, with regard to the fastening method of FRP and metal, there is an example in which a carbon fiber reinforced epoxy resin is used for a drive shaft for transmitting the rotation of the engine to a wheel, and a pipe joint structure is described in JP-A-5-164115. Yes. This is an idea for a structure in which the FRP pipe is fitted with a metal fastener without impairing strength reliability. The radius of the end of the FRP pipe is larger than the radius of the intermediate portion, It is hard to come off. Regarding other types of fastening of FRP and metal, Japanese Patent Application Laid-Open No. 50-128052 describes an idea of completing a fastening by making a notch at the end of the FRP pipe and forming a groove in this groove. ing. In Japanese Utility Model Laid-Open Nos. 51-138100, 55-057506, and 60-161793, a sleeve is fitted on the outer peripheral side of the end of the FRP pipe, and the wedge is effectively removed from the metal fastener. The hard ideas are listed.

JP-A-5-164115 Japanese Patent Laid-Open No. 50-128052 Japanese Utility Model Publication No. 51-138100 Japanese Utility Model Publication No. 55-057506 Japanese Utility Model Publication No. 60-161793 Mercedes Benz website (http://www.mercedes-benz.co.jp/slr/index2.html)

  The above prior art has the following problems. Since FRP is a resin reinforced with fiber, it is desirable to use it without bending the fiber as much as possible. If the fiber is bent, the fiber will easily buckle in the resin when a load is applied to the FRP member, and the required rigidity and strength will not be obtained. Therefore, when using FRP, it is important not to bend the fiber as much as possible.

  In the example described in Non-Patent Document 1, since the FRP reinforcing fibers are laminated while being bent in accordance with a smooth vehicle body curved surface in order to configure the FRP body, in order to ensure rigidity and strength equivalent to the steel body. In this case, it is necessary to increase the thickness of the fiber layer. As a result, the effect of weight reduction becomes thin.

  Also, with the conventional technology related to the FRP pipe and metal fastening structure, the idea to thicken the end of the FRP pipe requires the FRP pipe to be molded for each design target, and multiple types of dedicated molds must be prepared. It cannot be manufactured at low cost.

  In addition, if the notch is processed at the end of the FRP, the reinforcing fiber of the fastening part, which is the most important in terms of strength, will be cut, resulting in a significant reduction in strength.

  Further, in the idea of fitting a sleeve on the outer periphery of the FRP pipe and applying a surface pressure from the outer peripheral side with a metal screw placed on the outer periphery, the surface pressure is applied only from the outer peripheral side of the pipe. For this reason, at the time of thermal expansion, the outer peripheral metal screw and sleeve expand greatly outward in the radial direction, whereas FRP has a smaller linear expansion coefficient than metal, so the FRP pipe side does not expand much outward in the radial direction. . As a result, the surface pressure between the metal screw or sleeve tightened from the outside of the pipe and the FRP pipe is lowered.

  An object of the present invention is to provide an automotive body using a lightweight, high-rigidity, and high-strength FRP pipe at low cost, and the FRP pipe and metal that do not cause strength reduction even during thermal expansion due to temperature change. It is to provide a fastening structure.

  In order to achieve the above object, the present invention provides an automobile having a space frame structure having the following characteristics.

  In an automobile having a space frame structure, the space frame structure is formed of a plurality of cylindrical pipes made of resin containing fibers. The fibers forming the pipe are a combination of fibers oriented in the pipe longitudinal direction and fibers oriented in the pipe circumferential direction. In the pipe facing the traveling direction of the automobile, the amount of fibers facing the pipe longitudinal direction is larger than the amount of fibers facing the pipe circumferential direction. The plurality of pipes are fastened through metal fastening members.

  In the automobile having the space frame structure, the space frame structure is formed by a plurality of cylindrical pipes made of resin containing fibers. A conducting wire is passed through the pipe. A metal terminal is provided on the outer surface of the pipe. A hole is provided in the pipe, and the conductor and the terminal are electrically connected through the hole.

  In the automobile having the space frame structure, the space frame structure is formed by a plurality of cylindrical pipes made of resin containing fibers. Among the pipes, the pipes that are oriented in a direction perpendicular to the traveling direction of the automobile and that are installed horizontally with respect to the traveling surface of the automobile are fibers oriented in a predetermined angle with respect to the longitudinal direction of the pipe. Formed with.

  In the automobile having the space frame structure, the space frame structure is formed by a plurality of cylindrical pipes made of resin containing fibers. The fiber forming the pipe is a combination of a fiber facing the pipe longitudinal direction, a fiber facing a predetermined angle with respect to the pipe longitudinal direction, and a fiber facing the pipe circumferential direction. The fiber oriented in the longitudinal direction of the pipe and the fiber oriented in the circumferential direction of the pipe are present on the outer surface portion and the inner surface portion of the pipe. The fiber oriented in a predetermined angle direction with respect to the longitudinal direction of the pipe is present at the center of the pipe in the plate thickness direction.

  Preferably, the predetermined angle is 45 degrees.

  In the automobile having the space frame structure, the space frame structure is formed by a plurality of cylindrical pipes made of resin containing fibers. The fibers forming the pipe are made of short fibers.

  In the automobile having the space frame structure, the space frame structure is formed by a plurality of cylindrical pipes made of resin containing fibers. The plurality of pipes are fastened through metal fastening members. A conductor is wound around the surface of the pipe. The fastening member and the pipe fastened to the fastening member are electrically connected by the conductor.

  In the automobile having the space frame structure, the space frame structure is formed by a plurality of cylindrical pipes made of resin containing fibers. A box structure is formed in a part between the plurality of pipes.

  In the automobile having the space frame structure, the space frame structure is formed by a plurality of cylindrical pipes made of resin containing fibers. A conducting body is fitted into the peripheral edge of the end of the pipe. The conductive body covers an inner peripheral side and an outer peripheral side of an end portion of the pipe. A conductive inner tightening material that can be deformed radially outward of the pipe is inserted on the inner peripheral side of the pipe of the conductive body. A conductive outer tightening material that can be deformed radially inward of the pipe is provided around the outer peripheral side of the pipe of the conductive body. The inner tightening material and the outer tightening material are screw-fastened to apply a surface pressure to the conducting body from the inner peripheral side and the outer peripheral side of the pipe.

  Preferably, the fiber forming the pipe is carbon fiber, glass fiber, organic fiber, silicon carbide fiber, or alumina ceramic fiber, and the resin forming the pipe is a thermosetting resin or a thermoplastic resin.

  The automobile having the space frame structure according to the present invention has an FRP pipe reinforcing fiber that is not bent, so that the rigidity and strength in the fiber direction can be effectively maintained, and the FRP pipe having the minimum necessary plate thickness can be configured to be lightweight. Become. And although the pipe in the traveling direction of the automobile mainly undergoes deformation due to the vehicle weight, the effect of reducing the amount of deflection is produced by adding more reinforcing fibers in the traveling direction. Furthermore, a fastening member that is difficult to design can be made of metal, so that a sufficiently safe fastening member can be provided. By appropriately changing the fiber direction, effective rigidity can be generated in each part of the automobile and the weight can be reduced.

  In addition, by arranging a conductive wire inside the pipe and connecting them together via a metal fastener, the space frame structure is all in a conductive state, and an effect that the body ground can be easily taken when the electrical component is mounted is produced. By providing a conductor on the surface of the pipe, it becomes easier for current to flow through the entire frame structure during a lightning strike, and damage due to local heat generation can be prevented.

  As the FRP pipe fastening structure, surface pressure can be applied from the pipe outer periphery side and inner periphery side, and the tightening force is always maintained at the time of thermal deformation, so the reliability in strength is extremely high Get higher. By changing the type of reinforcing fiber or resin in each part of the car, it becomes possible to arrange FRP pipes with high shock absorption capability on the front, rear and side surfaces, increasing safety.

It is a perspective view of a car. It is a partial sectional view of the front left side of the automobile. It is a perspective view of the space frame of a motor vehicle. FIG. 3 is a perspective view of an FRP pipe made of fibers oriented in the axial direction and fibers oriented in the circumferential direction, having a conducting wire and a terminal. It is sectional drawing of the longitudinal direction of the FRP pipe made from the fiber which faced the axial direction, and the fiber which faced the circumferential direction which has a conducting wire and a terminal. It is a perspective view of the FRP pipe which has a conducting wire and a terminal, and was made of the fiber which turned to the direction of a predetermined angle to the longitudinal direction. FIG. 2 is a perspective view of an FRP pipe made of fibers facing in the axial direction, fibers facing in the circumferential direction, and fibers facing in the direction of ± 45 degrees with respect to the longitudinal direction. It is a perspective view of the FRP pipe made of a short fiber. It is a perspective view of the space frame structure of a motor vehicle where the foil or net | network of the conductor was wound around the surface of the FRP pipe. It is a perspective view of the space frame structure of a car which arranged the storage box between the FRP pipes of the lower part of a vehicle body. It is sectional drawing of the edge part of a FRP pipe. It is a perspective view of an inner side fastening material. It is a perspective view of an outer side fastening material. It is a perspective view of a metal fastening body connected to an end of an FRP pipe and FRP pipe. It is a perspective view of the metal fastening body sandwiched in the middle of the FRP pipe and the FRP pipe. It is a perspective view of the FRP pipe made of the fiber facing the axial direction and the fiber facing the circumferential direction. FIG. 3 is a perspective view of an FRP pipe made of fibers oriented at a predetermined angle with respect to the longitudinal direction.

  Embodiments of an automobile having a space frame structure according to the present invention will be described below with reference to the drawings.

  A first embodiment of the present invention will be described with reference to FIGS. 1 to 3 and FIGS. 16 and 17. 1 is a perspective view of an automobile, FIG. 2 is a partial sectional view of the front left side of the automobile, FIG. 3 is a perspective view of a space frame of the automobile, and FIG. 16 is directed to a fiber and a circumferential direction of a pipe. FIG. 17 is a perspective view of an FRP pipe made of fibers oriented in a predetermined angle (± 45 degrees) with respect to the longitudinal direction of the pipe.

  As shown in FIG. 1, the body 1 is a cover that covers the surface of an automobile, and heat insulation and soundproofing materials are attached to the inside to protect internal devices and passengers from wind and rain and to keep warm. It is a member. Further, it is formed from a smooth curved surface for maintaining aerodynamic stability during high-speed traveling. Inside the body 1, a cylindrical pipe 2 made of FRP (fiber reinforced plastic) is combined. The FRP pipe 2 has a straight line shape, and a metal fastening body 3 is interposed at a joint portion between the FRP pipes 2.

  As shown in FIG. 2, an engine or motor 4 for driving the automobile is fixed to the space frame structure combined with the FRP pipe 2. A wheel 6 having a braking device is attached to the tip of the output shaft 5 from the engine or motor 4. The wheel 6 is supported by the suspension arm 7, the spring, and the dashpot 8 with an appropriate spring constant and damping constant in the vertical direction. One end of the suspension arm 7, the spring, and the dashpot 8 is fixed to the FRP pipe 2 constituting the space frame structure. A panel 9 is attached to the FRP pipe 2 on the lower surface of the vehicle body to protect the vehicle-mounted items from wind and rain from the ground. The panel 9 is also used for the purpose of partitioning a living space where passengers are present and a space where the engine or motor 4 or the control device 10 is placed, and protects the passengers from noise and heat during traveling.

  The vehicle space frame structure according to the present embodiment will be described with reference to FIG. This space frame structure is composed of a pipe 11 facing in the vehicle traveling direction and a pipe 12 facing in a direction perpendicular to the vehicle traveling direction. The pipe 12 is installed horizontally with respect to the traveling surface of the automobile. The pipe 11 and the pipe 12 are made of a long fiber reinforced resin.

  As shown in FIG. 16, the pipe 11 facing the vehicle traveling direction is composed of a fiber 13 facing the longitudinal direction of the pipe (0 degree fiber 13) and a fiber 14 facing the pipe circumferential direction (90 degree fiber 14). Composed. The fiber amount of the 0 degree direction fiber 13 is larger than the fiber amount of the 90 degree direction fiber 14. Since FRP has high rigidity and strength in the direction in which the fibers are stretched, increasing the amount of fibers facing the pipe longitudinal direction (that is, the traveling direction of the car) can reduce the amount of deflection due to vehicle weight, and the minimum necessary plate Thickness FRP can increase the rigidity and strength in the direction in which the vehicle weight acts. Therefore, the vehicle weight can be reduced.

  As shown in FIG. 17, the pipe 12 oriented in a direction perpendicular to the vehicle traveling direction is composed of fibers 17 oriented in a direction at a predetermined angle with respect to the longitudinal direction of the pipe. The predetermined angle is preferably ± 45 degrees in consideration of rigidity and strength, and is therefore ± 45 degrees in the present embodiment and the following embodiments. Therefore, a fiber oriented in a predetermined angle direction with respect to the pipe longitudinal direction is referred to as a fiber 17 oriented within ± 45 degrees with respect to the pipe longitudinal direction (± 45 degree direction fiber 17). Thus, by constructing the pipe 12 oriented in the direction perpendicular to the traveling direction of the automobile with the ± 17 degree fiber 17, the torsional rigidity and strength of the pipe 12 on which the torsional load mainly acts is the minimum necessary plate thickness. It becomes big and can lighten the pipe.

  In the pipe 11 facing the traveling direction, when the thickness of the pipe disposed on the lower surface of the vehicle body is compared with the thickness of the pipe disposed on the upper surface of the vehicle body, it is desirable to make the pipe disposed on the upper surface of the vehicle body thicker. . Due to the action of the vehicle weight, a tensile force acts on the pipe on the lower surface of the car body due to bending deformation, and a compressive force acts on the pipe on the upper surface of the car body, but by making the pipe on the upper surface of the car body thicker, buckling due to compression is prevented. it can.

  Thus, according to this embodiment, it is possible to provide an automobile having a space frame structure that is lightweight and has high rigidity and strength.

  A second embodiment of the present invention will be described with reference to FIGS. FIG. 4 is a perspective view of an FRP pipe made of a fiber oriented in the axial direction and a fiber oriented in the circumferential direction having a conducting wire and a terminal, and FIG. 5 is oriented in the axial direction having a conducting wire and a terminal. It is sectional drawing of the longitudinal direction of the FRP pipe made from the fiber and the fiber which faced the circumferential direction.

  The FRP pipe 2 is made of fiber reinforced resin. As shown in FIG. 4, this reinforcing fiber has a laminated structure of 0-degree direction fibers 13 and 90-degree direction fibers 14 perpendicular thereto.

  In the present embodiment, a conducting wire 15 is passed through the FRP pipe 2 and a metal terminal 16 is provided on the outer surface. As shown in FIG. 5, the terminal 16 is exposed on the outer surface of the FRP pipe 2, and is electrically connected to the conductive wire 15 passed through the hole 40 provided in the FRP pipe 2.

  In the case of a conventional metal body, it is often performed to connect a battery ground terminal (minus terminal) to the body side, which is generally called body ground. Since FRP has an electric resistance larger than that of metal, it is necessary to positively pass a conducting wire through the pipe in order to take a body ground with the FRP space frame structure. If a vehicle having a space frame structure is manufactured using the FRP pipe 2 according to the present embodiment and the battery negative terminal is connected to the conductor 15, the battery negative terminal via the terminal 16 is provided wherever the FRP pipe exists. Wiring work is easy.

  A third embodiment according to the present invention will be described with reference to FIG. FIG. 6 is a perspective view of an FRP pipe made of fibers having a conductor and a terminal and oriented in a direction at a predetermined angle with respect to the longitudinal direction. Also in the present embodiment, the FRP reinforcing fibers 17 constituting the FRP pipe 2 are oriented in the direction of ± 45 degrees with respect to the pipe longitudinal direction.

  According to the present embodiment, the FRP pipe 2 is deformed in the direction in which the reinforcing fibers 17 are stretched mainly when a torsional load is applied, so that the necessary rigidity and strength can be maintained with a small amount of fibers. This FRP pipe 2 is a pipe having a space frame structure that is oriented in a direction perpendicular to the traveling direction of the vehicle and horizontal to the traveling surface of the vehicle (shown in FIG. The effect can be maximized by using the pipe 12).

  A fourth embodiment of the present invention will be described with reference to FIG. FIG. 7 is a perspective view of an FRP pipe made of fibers oriented in the axial direction, fibers oriented in the circumferential direction, and fibers oriented in a predetermined angle (± 45 degrees) with respect to the longitudinal direction. In this embodiment, one FRP pipe 2 is composed of reinforcing fibers facing four different directions. That is, the direction of the reinforcing fiber is oriented in the pipe longitudinal direction (0 degree direction fiber 13), the direction of the pipe circumferential direction (90 degree direction fiber 14), and the direction of ± 45 degree direction (± 45 degree direction fibers 17) are mixed to form the same pipe.

  When the load direction acting on the FRP pipe 2 is clear, that is, when the load is clearly a bending load or a torsion load, the reinforcing fibers can be oriented according to the load form. When the load direction is unknown, as shown in FIG. 7, the 0 degree direction fiber 13 and the 90 degree direction fiber 14 are arranged on the outer surface portion of the FRP pipe 2 having the highest bending stress, and the shear stress is the highest. By arranging ± 45 degree direction fibers 17 at the center of the heightened FRP pipe 2 in the plate thickness direction, the reinforcing fibers can be effectively applied to any load. In this case, 0 degree direction fibers 13 and 90 degree direction fibers 14 are arranged on the inner surface portion of the FRP pipe 2.

  A fifth embodiment of the present invention will be described with reference to FIG. FIG. 8 is a perspective view of an FRP pipe made of short fibers. In this embodiment, the FRP fibers constituting the FRP pipe 2 are short fibers 18. Resins using short fibers have the advantages of being easier to mold and cheaper than those of long fibers. Moreover, since there are abundant types of fibers, the type of fiber can be selected according to the purpose. For example, an aramid organic fiber is used in a bulletproof vest because of its high deformation absorption energy. However, by providing the FRP pipe 2 on which the fiber is disposed on the side surface of the vehicle body, safety at the time of collision increases. As described above, when the strength and rigidity of the FRP pipe 2 are not so high, the function can be effectively exhibited by the short fibers.

  A sixth embodiment of the present invention will be described with reference to FIG. FIG. 9 is a perspective view of an automobile space frame structure in which a conductor foil or net is wound around the surface of an FRP pipe. In the present embodiment, a foil or net 19 made of a conductor is wound around the surface of the FRP pipe disposed on the outermost peripheral portion (portion close to the outer surface of the vehicle body) of the space frame structure. The foil or net 19 is wound so as to be electrically connected to the metal fastener 3 that joins the FRP pipes together.

  According to the present embodiment, the current flowing on the outer surface of the vehicle body during lightning strikes the foil or net 19 wound around the surface of the FRP pipe, thereby preventing the heating of the FRP itself and minimizing the damage. it can. Further, by winding the foil or net 19 only on the pipe closest to the outer surface of the vehicle body among the FRP pipes, the increase in weight can be minimized, and damage during lightning strikes on the FRP can be prevented.

  A seventh embodiment of the present invention will be described with reference to FIG. FIG. 10 is a perspective view of a space frame structure of an automobile in which a storage box is disposed between FRP pipes at the lower part of the vehicle body. In this embodiment, an FRP storage box 20 is formed between the FRP pipes 2 at the lower part of the vehicle body. The storage box 20 may be made of metal, but FRP is desirable to achieve the purpose of providing a lightweight vehicle body. The storage box 20 contains a battery 21 for an electric vehicle and a fuel tank for an engine vehicle. FIG. 10 shows a case where the battery 21 is inserted. According to the present embodiment, since the battery 21 and the fuel tank that normally take up a space when loaded can be effectively arranged in the dead space between the FRP pipes 2 of the space frame, the automobile can be made compact.

  An eighth embodiment of the present invention will be described with reference to FIGS. A present Example is related with the connection part with the metal fastening body in a FRP pipe. 11 is a cross-sectional view of the end of the FRP pipe, FIG. 12 is a perspective view of the inner tightening material, FIG. 13 is a perspective view of the outer tightening material, and FIG. 14 is a metal fastening that connects the FRP pipe and the end of the FRP pipe. FIG. 15 is a perspective view of the FRP pipe and a metal fastening body sandwiched between the FRP pipes.

  As shown in FIG. 11, a conduction plate 22 is fitted into the FRP pipe 2 so as to cover the peripheral edge of the end. The conductive plate 22 covers the inner peripheral side and the outer peripheral side of the end portion of the FRP pipe 2. The end of the conducting wire 15 is electrically connected to the inner peripheral side of the FRP pipe 2 of the conduction plate 22.

  In the FRP pipe 2, the inner tightening material 23 is inserted into the inner peripheral side from the end where the conduction plate 22 is fitted. An outer tightening material 26 is fitted on the outer peripheral side of the conduction plate 22 and is screwed to the inner tightening material 23. The inner fastening material 23 and the outer fastening material 26 are made of a conductive material, for example, a metal such as an aluminum alloy or steel.

  As shown in FIG. 12, the inner tightening material 23 has a slit 24 processed at a portion in contact with the conduction plate 22, and is easily deformed outward in the radial direction of the FRP pipe 2. Further, a circumferential groove 25 is formed in the slit 24 processed portion.

  As shown in FIG. 13, the outer tightening material 26 has a slit 32 processed at a portion in contact with the conduction plate 22, and is easily deformed inward in the radial direction of the FRP pipe 2. Furthermore, a circumferential groove 33 is formed in the slit 32 processed portion.

  Returning to FIG. 11, the description will be continued. An inner insert material 27 is fixed to the center of the inner tightening material 23 by a tightening bolt 28 and a tightening nut 29. At this time, by tightening the bolt 28, the slit 24 opens radially outward, and pressure is applied to the conduction plate 22 from the inside.

  On the other hand, as shown in FIG. 11, the outer tightening material 26 is provided with a groove 31 having a wedge-shaped cross section, and the outer insert material 30 is in contact with the groove 31. By rotating the outer tightening member 26 in the circumferential direction, the outer insert member 30 applies pressure to the groove 31, and the portion where the slit 32 is processed is deformed radially inward. Thus, a surface pressure is applied from the outside of the conduction plate 22.

  The groove 25 of the inner tightening material 23 and the groove 33 of the outer tightening material 26 increase the friction coefficient with the conduction plate 22 and produce the effect of increasing the fitting force.

  According to the present embodiment, the inner tightening material 23 and the outer tightening material 26 can apply the surface pressure to the FRP pipe 2 independently from the inner peripheral side and the outer peripheral side. For this reason, a stable fastening force can be maintained even when the outside air temperature changes depending on the use environment and the FRP pipe 2 and the metal fastening body are deformed due to a difference in linear expansion coefficient. For example, when the temperature decreases from the time of assembly, the FRP pipe 2 is not deformed so much, but both the inner tightening material 23 and the outer tightening material 26 are deformed radially inward. At this time, by applying a sufficient surface pressure by the inner tightening material 23 in advance, the tightening force from the inner side is not lost even during cooling. Even when the temperature rises, the tightening force from the outside is not lost by sufficiently applying the surface pressure by the outer tightening material 26.

  Since the inner tightening material 23 and the outer tightening material 26 are in electrical contact with each other via the conductive plate 22, the conductive wire 15 in the FRP pipe 2 is brought into conduction only by being assembled.

  Moreover, as shown in FIG. 11, the freedom degree of the connection of the FRP pipe 2 and a metal fastening body can be made high by giving the ball process 34 to the edge part of the fastening bolt 28 of the FRP pipe 2. As shown in FIG. .

  As shown in FIG. 14, the metal fastener includes a fastening block 35, a fastening plate 36, and bolts 37. The fastening block 35 has a hole smaller than the radius of the ball machining 34 of the tightening bolt 28, and is connected to the FRP pipe 2 by fastening the ball machining 34 in this hole. Further, the fastening block 35 and the ball processing 34 can be fastened at an arbitrary shape and angle by the fastening plate 36 and the bolt 37.

  When the fastening block 35 is made of a conductive material, the conductive wires 15 in all the FRP pipes 2 connected to one metal fastening body are conducted. Therefore, the space frame structure manufactured using this fastening structure produces an effect that the body ground can be easily formed. The fastening block 35 does not need to be a rectangular parallelepiped, and the connection angle with the FRP pipe 2 can be adjusted by forming a surface having an arbitrary inclination.

  As described above, if all the fastening parts are made of metal, the strength design can be facilitated, and at the same time, the fastening parts can be made common, and the labor for producing a plurality of types of fastening parts can be saved.

  FIG. 15 shows an example in which a metal fastening body is sandwiched between intermediate portions of one FRP pipe 2 and another FRP pipe 2 is connected. In this example, the metal fastening body includes a fastening member 38, and the fastening member 38 sandwiches the middle part of the FRP pipe 2.

  According to the present embodiment, the FRP pipes 2 can be coupled to each other while maintaining high rigidity and high strength without cutting the reinforcing fibers of the FRP pipe 2 unnecessarily.

  The FRP reinforcing fibers constituting the FRP pipe described in this specification are made of carbon fibers, glass fibers, organic fibers, silicon carbide fibers, or alumina ceramic fibers, both long fibers and short fibers. It is assumed that the FRP resin is made of a thermosetting resin or a thermoplastic resin.

  DESCRIPTION OF SYMBOLS 2 ... FRP pipe, 3 ... Metal fastening body, 11 ... Pipe which faced the advancing direction of a car, 12 ... Pipe which faced a right angle to a car advancing direction, 13 ... 0 degree direction fiber, 14 ... 90 degree direction fiber, 15 ... Conductor, 16 ... terminal, 17 ... ± 45 degree direction fiber, 18 ... short fiber, 19 ... foil or net made of conductor, 20 ... FRP storage box, 21 ... battery, 22 ... conduction plate, 23 ... inner tightening 24: slit, 25: circumferential groove, 26: outer tightening material, 27: inner insert material, 28 ... tightening bolt, 29 ... tightening nut, 30 ... outer insert material, 31 ... groove, 32 ... Slit, 33 ... circumferential groove, 34 ... sphere processing, 35 ... fastening block, 36 ... fastening plate, 37 ... bolt, 40 ... hole.

Claims (10)

In a car having a space frame structure,
The space frame structure is formed of a plurality of cylindrical pipes made of resin containing fibers,
The fiber forming the pipe is composed of a combination of a fiber facing the pipe longitudinal direction and a fiber facing the pipe circumferential direction,
The pipe facing the traveling direction of the automobile has a greater amount of fibers facing the pipe longitudinal direction than the amount of fibers facing the pipe circumferential direction,
The plurality of pipes are fastened through metal fastening members.
An automobile having a space frame structure. In a car having a space frame structure,
The space frame structure is formed of a plurality of cylindrical pipes made of resin containing fibers,
A conducting wire is passed through the pipe,
A metal terminal is provided on the outer surface of the pipe,
A hole is provided in the pipe, and the conductor and the terminal are electrically connected through the hole.
An automobile having a space frame structure. In a car having a space frame structure,
The space frame structure is formed of a plurality of cylindrical pipes made of resin containing fibers,
Among the pipes, the pipes that are oriented in a direction perpendicular to the traveling direction of the automobile and that are installed horizontally with respect to the traveling surface of the automobile are fibers oriented in a predetermined angle with respect to the longitudinal direction of the pipe. Formed by,
An automobile having a space frame structure. In a car having a space frame structure,
The space frame structure is formed of a plurality of cylindrical pipes made of resin containing fibers,
The fiber forming the pipe is composed of a combination of a fiber facing the pipe longitudinal direction, a fiber facing a direction at a predetermined angle with respect to the pipe longitudinal direction, and a fiber facing the pipe circumferential direction,
The fiber facing the longitudinal direction of the pipe and the fiber facing the circumferential direction of the pipe are present on the outer surface portion and the inner surface portion of the pipe,
The fiber facing the direction of a predetermined angle with respect to the longitudinal direction of the pipe is present in the center of the pipe thickness direction of the pipe,
An automobile having a space frame structure.   The automobile having the space frame structure according to claim 3 or 4, wherein the predetermined angle is 45 degrees. In a car having a space frame structure,
The space frame structure is formed of a plurality of cylindrical pipes made of resin containing fibers,
An automobile having a space frame structure, wherein the fibers forming the pipe are made of short fibers. In a car having a space frame structure,
The space frame structure is formed of a plurality of cylindrical pipes made of resin containing fibers,
The plurality of pipes are fastened through metal fastening members,
A conductor is wound around the surface of the pipe,
The fastening member and the pipe fastened to the fastening member are electrically connected by the conductor,
An automobile having a space frame structure. In a car having a space frame structure,
The space frame structure is formed of a plurality of cylindrical pipes made of resin containing fibers,
A box structure is formed in a part between the plurality of pipes,
An automobile having a space frame structure. In a car having a space frame structure,
The space frame structure is formed of a plurality of cylindrical pipes made of resin containing fibers,
A conducting body is fitted into the peripheral edge of the end of the pipe, and the conducting body covers the inner peripheral side and the outer peripheral side of the end of the pipe,
On the inner peripheral side of the pipe of the conductive body, a conductive inner tightening material that can be deformed radially outward of the pipe is inserted,
On the outer peripheral side of the pipe of the conductive body, a conductive outer tightening material that can be deformed radially inward of the pipe is provided,
The inner tightening material and the outer tightening material are screw-fastened, and a surface pressure is applied to the conductive body from an inner peripheral side and an outer peripheral side of the pipe,
An automobile having a space frame structure. The automobile having the space frame structure according to any one of claims 1 to 9,
The fiber forming the pipe is carbon fiber, glass fiber, organic fiber, silicon carbide fiber, or alumina ceramic fiber,
An automobile having a space frame structure in which the resin forming the pipe is a thermosetting resin or a thermoplastic resin.

Images