WO2018131295A1 - Fuel tank - Google Patents

Fuel tank Download PDF

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Publication number
WO2018131295A1
WO2018131295A1 PCT/JP2017/041776 JP2017041776W WO2018131295A1 WO 2018131295 A1 WO2018131295 A1 WO 2018131295A1 JP 2017041776 W JP2017041776 W JP 2017041776W WO 2018131295 A1 WO2018131295 A1 WO 2018131295A1
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WO
WIPO (PCT)
Prior art keywords
reinforcing band
band member
side wall
fuel tank
wall
Prior art date
Application number
PCT/JP2017/041776
Other languages
French (fr)
Japanese (ja)
Inventor
博文 柴崎
Original Assignee
八千代工業株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 八千代工業株式会社 filed Critical 八千代工業株式会社
Priority to JP2018561837A priority Critical patent/JP6771042B2/en
Publication of WO2018131295A1 publication Critical patent/WO2018131295A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K15/00—Arrangement in connection with fuel supply of combustion engines or other fuel consuming energy converters, e.g. fuel cells; Mounting or construction of fuel tanks
    • B60K15/03—Fuel tanks
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M37/00—Apparatus or systems for feeding liquid fuel from storage containers to carburettors or fuel-injection apparatus; Arrangements for purifying liquid fuel specially adapted for, or arranged on, internal-combustion engines

Definitions

  • the present invention relates to a fuel tank.
  • Patent Document 1 As a fuel tank mounted on an automobile or the like, one described in Patent Document 1 is known.
  • the fuel tank of patent document 1 was a form which covered the whole area
  • the conventional fuel tank has a problem that the manufacturing cost increases because the amount of the fiber reinforced resin used is large.
  • the present invention was created to solve such problems, and an object of the present invention is to provide a fuel tank that can reduce manufacturing costs.
  • the present invention provides a fuel tank that is integrally provided with a plurality of reinforcing belt members formed of fiber-reinforced resin on the outer surface of a resin tank body including a lower wall, an upper wall, and a side wall.
  • the reinforcing belt member is continuously formed over the lower wall and the pair of opposing side walls, and is continuously formed over the upper wall and the pair of opposing side walls. It is characterized by.
  • the tank body can be efficiently reinforced by the reinforcing band member, and the amount of the fiber reinforced resin used can be reduced as compared with the conventional case, so that the manufacturing cost can be reduced.
  • the outer surface of the tank body has a concave portion having a concave cross section, and the reinforcing band member is formed in the concave portion and has a bottom portion and a pair of side walls rising from both ends of the bottom portion along the concave portion. It is preferable to have.
  • the strength of the fuel tank can be increased synergistically.
  • the reinforcing band member of the upper wall and the reinforcing band member of the lower wall are arranged so that the end portions face each other at the central portion of the side wall. According to such a configuration, the tank body can be reinforced with a good balance.
  • the tank body can be reinforced more firmly.
  • connection reinforcing band member that connects the adjacent reinforcing band members. According to such a configuration, the strength of the tank body can be partially increased.
  • the side wall of the tank body has an arc shape protruding sideways. According to this configuration, the strength of the side wall can be increased.
  • corner reinforcement formed by the corner portion constituted by the lower wall and the side wall adjacent to the lower wall and the corner portion constituted by the upper wall and the side wall adjacent to the upper wall It is preferable to have a band member.
  • the side wall When a negative pressure is applied to the fuel tank, the side wall may buckle, but according to such a configuration, the side wall can be reinforced efficiently.
  • the tank body is formed of a thermoplastic resin
  • the reinforcing band member is formed by laminating a plurality of fiber base materials and a plurality of resin films
  • the outermost layer of the reinforcing band member is It is preferably formed of a thermoplastic resin film.
  • the weldability between the reinforcing belt member and the tank body can be improved.
  • the corners of the reinforcing band member are formed thicker than other portions. According to such a configuration, it is possible to increase the strength of the corner portion while suppressing the manufacturing cost.
  • the fuel tank of the present invention it can be reinforced efficiently and the manufacturing cost can be reduced.
  • FIG. 1 is a perspective view showing a fuel tank according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view taken along the line II-II in FIG.
  • FIG. 3 is a sectional view taken along line III-III in FIG. 1.
  • FIG. 4 is a sectional view taken along line IV-IV in FIG. 1. It is an expanded sectional view of a reinforcement belt member and a crevice. It is a perspective view which shows the reinforcement band member group (reinforcement band member etc.) which concerns on 1st embodiment. It is a perspective view which shows the laminated body formation process of the manufacturing method of the fuel tank which concerns on 1st embodiment.
  • the fuel tank T is mounted on a moving means such as an automobile, a motorcycle, and a ship, and mainly includes a tank body 1 and a reinforcing band member group 2.
  • the shape of the fuel tank T is not limited to the form shown in FIG. 1, but in the present embodiment, the fuel tank T is formed so as to be symmetrical in the vertical direction, the horizontal direction, and the longitudinal direction.
  • the tank body 1 is a hollow container for storing fuel such as gasoline, and is formed of, for example, a thermoplastic resin including a barrier layer.
  • the tank body 1 is molded by, for example, blow molding.
  • the tank body 1 includes a lower wall 11, an upper wall 12, a first side wall 13, a second side wall 14, a third side wall 15, and a fourth side wall 16.
  • the first side wall 13, the second side wall 14, the third side wall 15, and the fourth side wall 16 are parts constituting the peripheral wall of the tank body 1.
  • the first side wall 13 and the second side wall 14 face each other substantially in parallel.
  • the third side wall 15 and the fourth side wall 16 are opposed to each other.
  • the third side wall 15 and the fourth side wall 16 protrude in a semicircular shape toward the outer side.
  • the lengths of the first side wall 13 and the second side wall 14 are shorter than the lengths of the third side wall 15 and the fourth side wall 16.
  • the lower wall 11, the upper wall 12, the third side wall 15, and the fourth side wall 16 of the tank body 1 are formed with concave portions 3 that are continuous over the entire circumference.
  • four recesses 3 are arranged in parallel in the front-rear direction with a gap therebetween.
  • the concave portion 3 has a bottom portion and a pair of side walls rising from the bottom portion, and is formed to open to the outside.
  • the recess 3 is formed with a constant cross section over the entire circumference. The number of the recesses 3 is not limited.
  • a continuous recess 5 is formed in the lower wall 11, the first side wall 13 and the upper wall 12 of the tank body 1.
  • two recesses 5 are formed in the left-right direction.
  • the concave portion 5 has a bottom portion and a pair of side walls rising from the bottom portion, and is formed to open to the outside.
  • the recessed part 5 is formed in the fixed cross section over the full length.
  • a continuous recess 6 is formed in the lower wall 11, the second side wall 14, and the upper wall 12 of the tank body 1.
  • two recesses 6 are formed in the left-right direction.
  • the concave portion 6 has a bottom portion and a pair of side walls rising from the bottom portion, and is formed to open to the outside.
  • the recessed part 6 is formed in the fixed cross section over the full length.
  • the reinforcing band member group 2 is a member that reinforces the tank body 1 as shown in FIGS. 1 and 6, and is provided on the outer surface of the tank body 1.
  • the reinforcing band member group 2 includes four lower reinforcing band members 21, four upper reinforcing band members 22, four lower corner reinforcing band members 23, and four upper corner reinforcing bands. It is comprised with the member 24.
  • FIG. The reinforcing band member group 2 is a thin band-shaped member made of fiber reinforced resin (FRP: Fiber-Reinforced Plastics), and is integrally formed on the outer surface of the tank body 1.
  • FRP Fiber-Reinforced Plastics
  • the four lower reinforcing band members (reinforcing band members) 21 are juxtaposed in parallel in the front-rear direction with a gap on the outer surface of the lower wall 11 as shown in FIGS. 1 and 6.
  • Each lower reinforcing band member 21 is disposed and integrally formed in each recess 3 of the lower wall 11 of the tank body 1.
  • the lower reinforcing band member 21 has a substantially U shape in appearance.
  • the lower reinforcing band member 21 includes a bottom portion 21a and side walls 21b and 21b that rise from both sides in the front-rear direction of the bottom portion 21a (see also FIG. 5).
  • the lower reinforcing band member 21 has a groove formed by the bottom 21a and the side walls 21b and 21b, and has a constant cross-sectional shape over the entire length.
  • the lower reinforcing band member 21 is continuously disposed across the third side wall 15, the lower wall 11, and the fourth side wall 16.
  • the four upper reinforcing band members (reinforcing band members) 22 are arranged in parallel in the front-rear direction with a gap on the outer surface of the upper wall 12, as shown in FIGS. Each upper reinforcing band member 22 is disposed and integrally formed in each concave portion 3 of the upper wall 12 of the tank body 1.
  • the upper reinforcing band member 22 has a substantially U shape in appearance.
  • the upper reinforcing band member 22 includes a bottom portion 22a and side walls 22b and 22b that rise from both sides in the front-rear direction of the bottom portion 22a. That is, the upper reinforcing band member 22 has a groove formed by the bottom 22a and the side walls 22b and 22b, and has a constant cross-sectional shape over the entire length.
  • the upper reinforcing band member 22 is continuously disposed across the third side wall 15, the upper wall 12 and the fourth side wall 16. Further, the upper end portion of the lower reinforcing band member 21 and the lower end portion of the upper reinforcing band member 22 are spaced apart from each other on the third side wall 15. Further, the upper end portion of the lower reinforcing band member 21 and the lower end portion of the upper reinforcing band member 22 are arranged on the fourth side wall 16 so as to be separated from each other.
  • the lower corner reinforcing band member 23 has a substantially L shape in appearance.
  • the lower corner reinforcing band member 23 includes a bottom portion 23a and side walls 23b and 23b rising from both sides of the bottom portion 23a. That is, in the lower corner reinforcing band member 23, a groove is formed by the bottom 23a and the side walls 23b, 23b, and has a constant cross-sectional shape over the entire length.
  • the other two lower corner reinforcing band members 23 are integrally formed in the concave portions 6 corresponding to the corner portions of the lower wall 11 and the second side wall 14, respectively.
  • the upper corner reinforcing band member 24 has a substantially L shape in appearance.
  • the upper corner reinforcing band member 24 includes a bottom portion 24a and side walls 24b and 24b rising from both sides of the bottom portion 24a. That is, the upper corner reinforcing band member 24 is formed with a concave groove by the bottom 24a and the side walls 24b, 24b, and has a constant cross-sectional shape over the entire length.
  • the other two upper corner reinforcing band members 24 are integrally formed in the recesses 6 corresponding to the corners of the upper wall 12 and the second side wall 14, respectively.
  • the lower corner reinforcing band members 23 and 23 are installed at the corners of the first side wall 13 and the lower wall 11, and the upper corner reinforcing band members are formed at the corners of the first side wall 13 and the upper wall 12. Since 24 and 24 are installed, in particular, it is possible to efficiently reinforce the negative pressure acting on the first side wall 13. Further, lower corner reinforcing band members 23 and 23 are installed at the corners of the second side wall 14 and the lower wall 11, and upper corner reinforcing band members 24 and 24 are installed at the corners of the second side wall 14 and the upper wall 12. Therefore, in particular, the negative pressure acting on the second side wall 14 can be efficiently reinforced.
  • the reinforcing band member group 2 only needs to be provided with at least one pair of the lower reinforcing band member 21 and the upper reinforcing band member 22.
  • the arrangement of the lower reinforcing band member 21 and the upper reinforcing band member 22 is not limited to the present embodiment, and the design can be changed as appropriate.
  • the lower reinforcing band member 21 and the upper reinforcing band member 22 may be arranged in a staggered manner instead of corresponding positions.
  • the lower reinforcing band member 21 may be disposed continuously to the first side wall 13, the lower wall 11, and the second side wall 14.
  • the upper reinforcing band member 22 may also be disposed continuously with the first side wall 13, the upper wall 12 and the second side wall 14.
  • the lower reinforcing band member 21 and the upper reinforcing band member 22 may be arranged in a cross shape in plan view.
  • the lower corner reinforcing band member 23 and the upper corner reinforcing band member 24 may be arranged to be staggered instead of corresponding positions.
  • the lower corner reinforcing band member 23 may be disposed at the corner between the lower wall 11 and the third side wall 15 or at the corner between the lower wall 11 and the fourth side wall 16.
  • the upper corner reinforcing band member 24 may be disposed at the corner between the upper wall 12 and the third side wall 15 or at the corner between the upper wall 12 and the fourth side wall 16. Further, the lower corner reinforcing band member 23 and the upper corner reinforcing band member 24 may be omitted.
  • the lower reinforcing band member 21, the upper reinforcing band member 22, the lower corner reinforcing band member 23, and the upper corner reinforcing band member 24 are all formed in a concave cross section, but the semicircular cross section, triangular cross section, plate shape, etc. The shape may also be
  • a method for manufacturing a fuel tank will be described.
  • a laminated body forming step, a reinforcing band member forming step, an arranging step, and a fuel tank forming step are mainly performed.
  • the laminated body forming step is a step of forming a laminated body 33 by overlapping a plurality of fiber base materials 31 and a plurality of resin films 32 as shown in FIG.
  • the fiber substrate 31 is a thin sheet formed of carbon fiber, glass fiber, resin fiber, or the like. Each fiber base material 31 is laminated so that the fiber orientation angles are different.
  • the resin film 32 is a thin film formed of a thermoplastic resin (high density polyethylene, polyethylene, nylon, etc.) or a thermosetting resin (phenol resin, epoxy resin, etc.). The resin films 32 and 32 are laminated so as to sandwich the fiber base material 31 therebetween.
  • the laminated body 33 is impregnated with the melted resin film 32 inside the fiber base material 31 to express a predetermined strength, and is melted at a predetermined temperature during a fuel tank molding process to be described later. It sets suitably so that it may weld. Further, the laminated body 33 is appropriately set so that each reinforcing band member is formed by being deformed at a predetermined temperature during a reinforcing band member forming step described later.
  • the design of the laminate 33 can be changed as appropriate. For example, you may laminate the fiber base material 31 which consists of a different material for every base material. Moreover, you may laminate
  • the material constituting the laminated body 33 and the order of lamination are appropriately set in consideration of the adhesiveness with the material of the tank body 1 and the strength characteristics (matching between the fiber base material 31 and the resin film 32) exhibited by the laminated body 33. Is preferred.
  • the stacking order is not limited to the configuration in which the fiber base material 31 and the resin film 32 are alternately stacked, and the thermosetting resin film 32 and the tank body 1 having good impregnation with respect to the fiber base material 31 are included.
  • a thermoplastic resin film 32 having good weldability may be laminated adjacently.
  • the reinforcing band member forming step is a step of forming the lower reinforcing band member 21, the upper reinforcing band member 22, the lower corner reinforcing band member 23, and the upper corner reinforcing band member 24, respectively.
  • the reinforcing band member is formed using a reinforcing band forming die K constituted by a lower die K1 and an upper die K2.
  • the lower mold K1 and the upper mold K2 are each formed with a temperature adjustment unit M capable of adjusting the temperature.
  • the laminate 33 is sandwiched between the lower mold K1 and the upper mold K2 and heated at a predetermined temperature, for example, to form the lower reinforcing band member 21 shown in FIG.
  • the placement step is a step of placing the reinforcing band member group 2 on the fuel tank mold J as shown in FIG.
  • the fuel tank molding die J has a first die J1 that molds the lower side and a second die J2 that molds the upper side.
  • Installation convex portions J1a and J1b are formed on the one mold J1 and the other mold J2 of the fuel tank mold J, respectively.
  • the installation convex portions J1a are formed on the bottom surfaces of the one mold J1 and the other mold J2 with a predetermined gap therebetween.
  • the installation convex portion J1a is a portion where the lower reinforcing belt member 21 or the upper reinforcing belt member 22 is disposed, and is formed in a substantially rectangular cross section.
  • the installation convex part J1a is also a part for molding the concave part 3 of the tank body 1.
  • the installation convex part J1b is formed in the corner
  • the installation convex portion J1b is a portion where the lower corner reinforcing band member 23 and the upper corner reinforcing band member 24 are disposed, and is formed in a substantially rectangular cross section.
  • the installation protrusion J1b is also a part for forming the recesses 5 and 6 of the tank body 1 respectively.
  • the lower reinforcing band members 21 are arranged on the installation protrusions J1a of the one-sided J1, and the lower corner reinforcing band members 23 are arranged on the installation protrusions J1b. Further, in the arranging step, each upper reinforcing band member 22 is arranged on each installation convex portion J1a of the other mold J2, and each lower corner reinforcing band member 23 is arranged on each installation convex portion J1b. Since the one mold J1 and the other mold J2 are preheated to a predetermined temperature, when the reinforcing band member group 2 is disposed, the reinforcing band member group 2 and the one mold J1 and the other mold J2 are attached so as not to fall. become.
  • the fuel tank molding step is a step of blow molding the fuel tank T with a fuel tank mold J as shown in FIGS.
  • a cylindrical or sheet-like parison P (FIG. 10) is discharged from the die D between the one mold J1 and the other mold J2.
  • the parison P is, for example, a thermoplastic resin composed of a plurality of layers including a barrier layer inside.
  • the fuel tank mold J is preheated to a predetermined temperature so that the parison P is plastically deformed.
  • the parison P is transferred to the molding surface of the fuel tank mold J, and the parison P and the reinforcing band member group 2 (lower reinforcing band member 21, upper reinforcing band member 22, lower corner reinforcing band member 23 and upper corner reinforcing member).
  • the belt member 24 is welded and integrated.
  • the parison P may be sucked using the vacuuming means provided in the one mold J1 and the other mold J2, and the parison P may be transferred to the fuel tank mold J.
  • the mold is removed and the fuel tank T is taken out.
  • the tank body 1 can be efficiently reinforced by the reinforcing band member group 2. More specifically, the lower reinforcing member 21 and the upper reinforcing member 22 are installed on the lower wall 11 and the upper wall 12 respectively, thereby efficiently reinforcing the lower wall 11 and the upper wall 12 on which a large positive pressure acts. Can do.
  • the lower reinforcing band member 21 is formed continuously over the third side wall 15, the lower wall 11, and the fourth side wall 16, the reinforcement efficiency can be increased.
  • the upper reinforcement belt member 22 is continuously formed over the third side wall 15, the upper wall 12, and the fourth side wall 16, the reinforcement efficiency can be increased.
  • the first side wall 13 and the second side wall 14 on which a large negative pressure acts can be reinforced.
  • the lower corner reinforcing band member 23 is formed continuously over the first side wall 13 and the lower wall 11 and is formed continuously over the second side wall 14 and the lower wall 11.
  • the reinforcement efficiency can be increased.
  • the upper corner reinforcing band member 24 is formed continuously over the first side wall 13 and the upper wall 12 and continuously formed over the second side wall 14 and the upper wall 12. The reinforcement efficiency can be increased.
  • the reinforcing band member group 2 (the lower reinforcing band member 21, the upper reinforcing band member, the lower corner reinforcing band member 23, and the upper corner reinforcing band member 24) is integrally formed in the recesses 3, 5, and 6 and Since it is comprised by the bottom part and a pair of side wall so that the shape of 3,5,6 may be followed, reinforcement efficiency can be raised synergistically.
  • the strength of the fuel tank T can be increased in a well-balanced manner. Further, since the lower reinforcing band member 21 and the upper reinforcing band member 22 are arranged in parallel with a gap therebetween, the strength of the fuel tank T can be increased in a well-balanced manner.
  • both ends of the lower reinforcing band member 21 and the upper reinforcing band member 22 which are vertically opposed to each other, and the end portions of the lower corner reinforcing band member 23 and the upper corner reinforcing band member 24 are the first side wall 13, the second side wall 14, The third side wall 15 and the fourth side wall 16 are spaced apart from each other at the center in the vertical direction.
  • both ends of the lower reinforcing band member 21 and the upper reinforcing band member 22 and the ends of the lower corner reinforcing band member 23 and the upper corner reinforcing band member 24 are spaced apart with the parting line of the tank body 1 interposed therebetween. Is arranged. Thereby, the intensity
  • the reinforcing band member group 2 is arranged on the installation convex portion J1a and the installation convex portion J1b provided in the fuel tank mold J, so that the positional displacement of the reinforcing band member group 2 is prevented at the time of molding. Can do. Further, in the fuel tank molding process, the reinforcing band member group 2 is welded to the parison P during blow molding, so that it can be easily integrally molded and the step between the tank body 1 and the reinforcing band member group 2 can be reduced. it can.
  • the third side wall 15 and the fourth side wall 16 of the tank main body 1 have an arc shape protruding sideways.
  • strength with respect to the external force which acts from the outer side of the 3rd side wall 15 and the 4th side wall 16 can be raised.
  • the fuel tank TA is mainly different from the first embodiment in that the fuel tank TA includes the opening 17, the connection reinforcing belt members 25, 25, and the auxiliary reinforcing belt members 26, 26.
  • the description will focus on the parts that are different from the first embodiment.
  • the first side wall 13 is formed with three recesses 5, lower corner reinforcing band members 23, and three upper corner reinforcing band members 24, respectively.
  • the second side wall 14 is formed with three recesses 6, three lower corner reinforcing band members 23 and three upper corner reinforcing band members 24, respectively.
  • a circular opening 17 is formed at the center of the upper wall 12 of the tank body 1.
  • the opening 17 is a part where a built-in component such as a pump module (not shown) is installed.
  • the upper wall 12 has recesses 7 and 7 connected to the recesses 3 and 3 at both ends with the opening 17 interposed therebetween.
  • the recesses 7 and 7 extend in the front-rear direction, have a rectangular cross section, and open upward.
  • the recesses 7 and 7 are formed perpendicular to the recesses 3 and 3.
  • connection reinforcing belt member 25 is disposed inside the recess 7 and is integrally formed with the recess 7.
  • the connection reinforcing belt member 25 includes a bottom portion 25a and side walls 25b and 25b rising from both ends of the bottom portion 25a.
  • the connection reinforcing belt member 25 and the concave portion 7 are connected to the adjacent upper reinforcing belt members 22, 22 and the concave portion 3, respectively.
  • the connection reinforcing band members 25 and 25 are integrally formed by welding to the upper reinforcing band members 22 and 22 by being overlapped during the fuel tank forming process.
  • the connection reinforcing band members 25 and 25 may be integrally formed with the upper reinforcing band members 22 and 22 in advance in the reinforcing band member forming step.
  • the auxiliary reinforcing belt member 26 is disposed inside the middle recess 3 and is integrally formed with the recess 3.
  • the right auxiliary reinforcing belt member 26 is formed from the right connecting reinforcing belt member 25 to the center of the third side wall 15.
  • the left auxiliary reinforcing band member 26 is formed from the left connecting reinforcing band member 25 to the center of the fourth side wall 16.
  • the auxiliary reinforcing belt member 26 includes a bottom portion 26a and side walls 26b and 26b rising from both ends of the bottom portion 26a.
  • the auxiliary reinforcing band members 26 and 26 are integrally formed by being welded to the connecting reinforcing band members 25 and 25, respectively, by being overlapped during the fuel tank forming process.
  • the auxiliary reinforcing band members 26 and 26 may be integrally formed with the connection reinforcing band members 25 and 25 in advance in the reinforcing band member forming step.
  • the fuel tank T according to the second embodiment described above can also provide substantially the same effect as the first embodiment.
  • the strength in the front-rear direction can be increased by providing the connection reinforcing band members 25, 25 connected to the upper reinforcing band members 22, 22. Further, by providing the connection reinforcing band members 25, 25, it is possible to locally reinforce a portion where the strength is to be increased, such as around the opening 17.
  • FIG. 13 is a schematic cross-sectional view showing a modified example of the laminated body forming step.
  • FIG. 14 is a schematic cross-sectional view showing a modification of the reinforcing band member.
  • the auxiliary laminated body 41 is provided in a part of the laminated body 33.
  • a composite laminate 42 may be formed.
  • the auxiliary laminated body 41 is provided so as to be laminated on a part of the laminated body 33 so that the thickness is increased.
  • the auxiliary laminated body 41 is disposed so as to be gradually shortened as it is separated from the laminated body 33 (so that the lateral length in FIG. 13 is shortened).
  • the reinforcing band member 2A is formed by the composite laminate 42 of FIG.
  • the thickness of the outer corner is larger than that of other portions.
  • the strength of a part of the reinforcing band member is increased, if the thickness of the entire laminate is increased, the thickness of a portion that does not require reinforcement is increased, which is uneconomical.
  • the strength of the reinforcing band member 2A can be locally increased and the strength can be efficiently increased. That is, the reinforcing band member may be appropriately formed so that its thickness varies depending on the application of the fuel tank T. Further, by forming the auxiliary laminated body 41 so as to be gradually shortened as it is separated from the laminated body 33, it is possible to prevent a step on the outer surface of the corner from becoming large after molding.
  • the reinforcing band members are formed so as to be separated from each other at the central portions of the first side wall 13, the second side wall 14, the third side wall 15, and the fourth side wall 16, but they may be overlapped.

Abstract

The present invention addresses the problem of providing a fuel tank which makes it possible to reduce manufacturing costs. This fuel tank is integrally provided with a plurality of reinforcement band member groups (2) which are formed of a fiber-reinforced resin and are provided on the outer surface of a resin tank body (1) including a lower wall (11), an upper wall (12), and a first side wall (13), a second side wall (14), a third side wall (15), and a fourth side wall (16). The fuel tank is characterized in that the reinforced band members are formed continuously across the lower wall (11) and the opposing pair of the third side wall (15) and the fourth side wall (16), and are formed continuously across the upper wall (12) and the opposing pair of the third side wall (15) and the fourth side wall (16).

Description

燃料タンクFuel tank
　本発明は、燃料タンクに関する。 The present invention relates to a fuel tank.
　自動車等に搭載される燃料タンクとして、特許文献１に記載されたものが知られている。特許文献１の燃料タンクは、繊維強化樹脂層でタンク本体の全領域を覆う形態であった。 As a fuel tank mounted on an automobile or the like, one described in Patent Document 1 is known. The fuel tank of patent document 1 was a form which covered the whole area | region of a tank main body with a fiber reinforced resin layer.
特許第５６０８２８７号公報Japanese Patent No. 5608287
　しかし、従来の燃料タンクであると、繊維強化樹脂の使用量が多いため、製造コストが嵩むという問題がある。 However, the conventional fuel tank has a problem that the manufacturing cost increases because the amount of the fiber reinforced resin used is large.
　本発明は、このような課題を解決するために創作されたものであり、製造コストを低減することができる燃料タンクを提供することを課題とする。 The present invention was created to solve such problems, and an object of the present invention is to provide a fuel tank that can reduce manufacturing costs.
　前記課題を解決するため、本発明は、下壁、上壁及び側壁とを含んだ樹脂製のタンク本体の外面に、繊維強化樹脂で形成された複数の補強帯部材を一体的に備える燃料タンクであって、前記補強帯部材は、前記下壁及び対向する一対の前記側壁に亘って連続的に形成されているとともに、前記上壁及び対向する一対の前記側壁に亘って連続的に形成されていることを特徴とする。 In order to solve the above-described problems, the present invention provides a fuel tank that is integrally provided with a plurality of reinforcing belt members formed of fiber-reinforced resin on the outer surface of a resin tank body including a lower wall, an upper wall, and a side wall. The reinforcing belt member is continuously formed over the lower wall and the pair of opposing side walls, and is continuously formed over the upper wall and the pair of opposing side walls. It is characterized by.
　かかる構成によれば、補強帯部材によりタンク本体を効率良く補強することができるとともに、従来に比べて繊維強化樹脂の使用量を減らすことができるため製造コストを低減することができる。 According to such a configuration, the tank body can be efficiently reinforced by the reinforcing band member, and the amount of the fiber reinforced resin used can be reduced as compared with the conventional case, so that the manufacturing cost can be reduced.
　また、前記タンク本体の外面に断面凹状を呈する凹部を有し、前記補強帯部材は、前記凹部内に形成されるとともに当該凹部に沿うように底部と、前記底部の両端から立ち上がる一対の側壁とを有することが好ましい。 The outer surface of the tank body has a concave portion having a concave cross section, and the reinforcing band member is formed in the concave portion and has a bottom portion and a pair of side walls rising from both ends of the bottom portion along the concave portion. It is preferable to have.
　かかる構成によれば、燃料タンクの強度を相乗的に高めることができる。 According to this configuration, the strength of the fuel tank can be increased synergistically.
　また、前記上壁の前記補強帯部材及び下壁の前記補強帯部材は、端部同士がそれぞれ前記側壁の中央部で臨むように配置されていることが好ましい。かかる構成によれば、タンク本体をバランス良く補強することができる。 Further, it is preferable that the reinforcing band member of the upper wall and the reinforcing band member of the lower wall are arranged so that the end portions face each other at the central portion of the side wall. According to such a configuration, the tank body can be reinforced with a good balance.
　また、前記補強帯部材は、間隔をあけて複数並設されていることが好ましい。かかる構成によれば、タンク本体をより強固に補強することができる。 Moreover, it is preferable that a plurality of the reinforcing band members are arranged in parallel at intervals. According to this configuration, the tank body can be reinforced more firmly.
　また、隣り合う当該補強帯部材を接続する接続補強帯部材を有することが好ましい。かかる構成によれば、タンク本体の強度を部分的に高めることができる。 Moreover, it is preferable to have a connection reinforcing band member that connects the adjacent reinforcing band members. According to such a configuration, the strength of the tank body can be partially increased.
　また、前記タンク本体の側壁は、側方に突出する円弧状を呈することが好ましい。かかる構成によれば、側壁の強度を高めることができる。 Further, it is preferable that the side wall of the tank body has an arc shape protruding sideways. According to this configuration, the strength of the side wall can be increased.
　また、前記下壁と当該下壁に隣接する前記側壁とで構成される角部、及び、前記上壁と当該上壁に隣接する前記側壁とで構成される角部にそれぞれ形成される角補強帯部材を有することが好ましい。 In addition, corner reinforcement formed by the corner portion constituted by the lower wall and the side wall adjacent to the lower wall and the corner portion constituted by the upper wall and the side wall adjacent to the upper wall. It is preferable to have a band member.
　燃料タンクに負圧を作用させると側壁が座屈するおそれがあるが、かかる構成によれば、側壁を効率良く補強することができる。 When a negative pressure is applied to the fuel tank, the side wall may buckle, but according to such a configuration, the side wall can be reinforced efficiently.
　また、前記タンク本体は、熱可塑性樹脂で形成されており、前記補強帯部材は、複数の繊維基材と複数の樹脂フィルムとを積層させて形成されており、前記補強帯部材の最外層は、熱可塑性の樹脂フィルムで形成されていることが好ましい。 Further, the tank body is formed of a thermoplastic resin, the reinforcing band member is formed by laminating a plurality of fiber base materials and a plurality of resin films, and the outermost layer of the reinforcing band member is It is preferably formed of a thermoplastic resin film.
　かかる構成によれば、補強帯部材とタンク本体との溶着性を向上させることができる。 According to such a configuration, the weldability between the reinforcing belt member and the tank body can be improved.
　また、前記補強帯部材の角部は他の部位に対して厚く形成されていることが好ましい。かかる構成によれば、製造コストを抑えつつ、角部の強度を高めることができる。 Further, it is preferable that the corners of the reinforcing band member are formed thicker than other portions. According to such a configuration, it is possible to increase the strength of the corner portion while suppressing the manufacturing cost.
　本発明の燃料タンクによれば、効率良く補強することができるとともに製造コストを低減することができる。 According to the fuel tank of the present invention, it can be reinforced efficiently and the manufacturing cost can be reduced.
本発明の一実施形態に係る燃料タンクを示す斜視図である。1 is a perspective view showing a fuel tank according to an embodiment of the present invention. 図１のII－II断面図である。FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 図１のIII－III断面図である。FIG. 3 is a sectional view taken along line III-III in FIG. 1. 図１のIV－IV断面図である。FIG. 4 is a sectional view taken along line IV-IV in FIG. 1. 補強帯部材及び凹部の拡大断面図である。It is an expanded sectional view of a reinforcement belt member and a crevice. 第一実施形態に係る補強帯部材群（補強帯部材等）を示す斜視図である。It is a perspective view which shows the reinforcement band member group (reinforcement band member etc.) which concerns on 1st embodiment. 第一実施形態に係る燃料タンクの製造方法の積層体形成工程を示す斜視図である。It is a perspective view which shows the laminated body formation process of the manufacturing method of the fuel tank which concerns on 1st embodiment. 第一実施形態に係る燃料タンクの製造方法の補強帯部材成形工程を示す概略断面図である。It is a schematic sectional drawing which shows the reinforcement band member shaping | molding process of the manufacturing method of the fuel tank which concerns on 1st embodiment. 補強帯部材（下部補強帯部材）を示す斜視図である。It is a perspective view which shows a reinforcement belt member (lower reinforcement belt member). 第一実施形態に係る燃料タンクの製造方法の配置工程を示す概略断面図である。It is a schematic sectional drawing which shows the arrangement | positioning process of the manufacturing method of the fuel tank which concerns on 1st embodiment. 第一実施形態に係る燃料タンクの製造方法の燃料タンク成形工程を示す概略断面図である。It is a schematic sectional drawing which shows the fuel tank formation process of the manufacturing method of the fuel tank which concerns on 1st embodiment. 本発明の第二実施形態に係る燃料タンクを示す斜視図である。It is a perspective view which shows the fuel tank which concerns on 2nd embodiment of this invention. 積層体形成工程の変形例を示す概略断面図である。It is a schematic sectional drawing which shows the modification of a laminated body formation process. 補強帯部材の変形例を示す概略断面図である。It is a schematic sectional drawing which shows the modification of a reinforcement belt member.
　以下、本発明の実施形態に係る燃料タンク及び燃料タンクの製造方法を、図面を参照して説明する。以下の説明において、「前後」、「左右」、「上下」を言うときは、図１に示した方向を基準とする。なお、各方向は、燃料タンクＴを説明する上で便宜上設定したものであり、燃料タンクＴを車両に搭載したときの方向を限定する趣旨ではない。 Hereinafter, a fuel tank and a method for manufacturing the fuel tank according to an embodiment of the present invention will be described with reference to the drawings. In the following description, when referring to “front and rear”, “left and right”, and “up and down”, the direction shown in FIG. 1 is used as a reference. Each direction is set for convenience in describing the fuel tank T, and is not intended to limit the direction when the fuel tank T is mounted on the vehicle.
　燃料タンクＴは、図１に示すように、自動車やバイク並びに船舶等の移動手段に搭載されるものであり、タンク本体１と、補強帯部材群２とで主に構成されている。燃料タンクＴの形状は図１の形態に限定されるものではないが、本実施形態では上下、左右、前後それぞれにおいて対称となるように形成されている。 As shown in FIG. 1, the fuel tank T is mounted on a moving means such as an automobile, a motorcycle, and a ship, and mainly includes a tank body 1 and a reinforcing band member group 2. The shape of the fuel tank T is not limited to the form shown in FIG. 1, but in the present embodiment, the fuel tank T is formed so as to be symmetrical in the vertical direction, the horizontal direction, and the longitudinal direction.
　タンク本体１は、図１及び図２に示すように、ガソリン等の燃料を貯溜する中空容器であり、例えばバリア層を含んだ熱可塑性樹脂で形成されている。タンク本体１は、例えばブロー成形等によって成形される。タンク本体１は、下壁１１と、上壁１２と、第一側壁１３、第二側壁１４、第三側壁１５及び第四側壁１６とで構成されている。第一側壁１３、第二側壁１４、第三側壁１５及び第四側壁１６は、タンク本体１の周壁を構成する部位である。第一側壁１３と、第二側壁１４とは略平行に対向している。また、第三側壁１５と第四側壁１６とは対向している。第三側壁１５及び第四側壁１６は、外側側方に向けて半円状に突出している。本実施形態では、第一側壁１３及び第二側壁１４の長さは、第三側壁１５及び第四側壁１６の長さよりも短くなっている。 As shown in FIGS. 1 and 2, the tank body 1 is a hollow container for storing fuel such as gasoline, and is formed of, for example, a thermoplastic resin including a barrier layer. The tank body 1 is molded by, for example, blow molding. The tank body 1 includes a lower wall 11, an upper wall 12, a first side wall 13, a second side wall 14, a third side wall 15, and a fourth side wall 16. The first side wall 13, the second side wall 14, the third side wall 15, and the fourth side wall 16 are parts constituting the peripheral wall of the tank body 1. The first side wall 13 and the second side wall 14 face each other substantially in parallel. The third side wall 15 and the fourth side wall 16 are opposed to each other. The third side wall 15 and the fourth side wall 16 protrude in a semicircular shape toward the outer side. In the present embodiment, the lengths of the first side wall 13 and the second side wall 14 are shorter than the lengths of the third side wall 15 and the fourth side wall 16.
　図２及び図３に示すように、タンク本体１の下壁１１、上壁１２、第三側壁１５及び第四側壁１６には、全周に亘って連続する凹部３が形成されている。凹部３は、本実施形態では間をあけて前後方向に平行に４つ並設されている。凹部３は、底部及び当該底部から立ち上がる一対の側壁を有し、外側に開放するように形成されている。凹部３は、全周に亘って一定の断面で形成されている。凹部３の個数は限定されるものではない。 As shown in FIGS. 2 and 3, the lower wall 11, the upper wall 12, the third side wall 15, and the fourth side wall 16 of the tank body 1 are formed with concave portions 3 that are continuous over the entire circumference. In the present embodiment, four recesses 3 are arranged in parallel in the front-rear direction with a gap therebetween. The concave portion 3 has a bottom portion and a pair of side walls rising from the bottom portion, and is formed to open to the outside. The recess 3 is formed with a constant cross section over the entire circumference. The number of the recesses 3 is not limited.
　図１及び図４に示すように、タンク本体１の下壁１１、第一側壁１３及び上壁１２には、連続する凹部５が形成されている。凹部５は、本実施形態では、左右方向に２つ形成されている。凹部５は、底部及び当該底部から立ち上がる一対の側壁を有し、外側に開放するように形成されている。また、凹部５は、全長に亘って一定の断面で形成されている。 As shown in FIGS. 1 and 4, a continuous recess 5 is formed in the lower wall 11, the first side wall 13 and the upper wall 12 of the tank body 1. In the present embodiment, two recesses 5 are formed in the left-right direction. The concave portion 5 has a bottom portion and a pair of side walls rising from the bottom portion, and is formed to open to the outside. Moreover, the recessed part 5 is formed in the fixed cross section over the full length.
　また、図１に示すように、タンク本体１の下壁１１、第二側壁１４及び上壁１２には、連続する凹部６が形成されている。凹部６は、本実施形態では、左右方向に２つ形成されている。凹部６は、底部及び当該底部から立ち上がる一対の側壁を有し、外側に開放するように形成されている。また、凹部６は、全長に亘って一定の断面で形成されている。 Further, as shown in FIG. 1, a continuous recess 6 is formed in the lower wall 11, the second side wall 14, and the upper wall 12 of the tank body 1. In the present embodiment, two recesses 6 are formed in the left-right direction. The concave portion 6 has a bottom portion and a pair of side walls rising from the bottom portion, and is formed to open to the outside. Moreover, the recessed part 6 is formed in the fixed cross section over the full length.
　補強帯部材群２は、図１及び図６に示すように、タンク本体１を補強する部材であって、タンク本体１の外面に設けられている。補強帯部材群２は、本実施形態では、４本の下部補強帯部材２１と、４本の上部補強帯部材２２と、４本の下部角補強帯部材２３と、４本の上部角補強帯部材２４とで構成されている。補強帯部材群２は、繊維強化樹脂（ＦＲＰ：Fiber-Reinforced Plastics）で形成された薄い帯状の部材であって、タンク本体１の外面にそれぞれ一体形成されている。 The reinforcing band member group 2 is a member that reinforces the tank body 1 as shown in FIGS. 1 and 6, and is provided on the outer surface of the tank body 1. In the present embodiment, the reinforcing band member group 2 includes four lower reinforcing band members 21, four upper reinforcing band members 22, four lower corner reinforcing band members 23, and four upper corner reinforcing bands. It is comprised with the member 24. FIG. The reinforcing band member group 2 is a thin band-shaped member made of fiber reinforced resin (FRP: Fiber-Reinforced Plastics), and is integrally formed on the outer surface of the tank body 1.
　４本の下部補強帯部材（補強帯部材）２１は、図１及び図６に示すように、下壁１１の外面に間をあけて前後方向に平行に並設されている。各下部補強帯部材２１は、タンク本体１の下壁１１の各凹部３に配置され一体形成されている。下部補強帯部材２１は、外観視略Ｕ字状を呈する。下部補強帯部材２１は、底部２１ａと、底部２１ａの前後方向両側から立ち上がる側壁２１ｂ，２１ｂとで構成されている（図５も参照）。つまり、下部補強帯部材２１には底部２１ａと、側壁２１ｂ，２１ｂとで凹溝が形成されており、全長に亘って一定の断面形状になっている。下部補強帯部材２１は、第三側壁１５、下壁１１及び第四側壁１６に亘って連続的に配置されている。 The four lower reinforcing band members (reinforcing band members) 21 are juxtaposed in parallel in the front-rear direction with a gap on the outer surface of the lower wall 11 as shown in FIGS. 1 and 6. Each lower reinforcing band member 21 is disposed and integrally formed in each recess 3 of the lower wall 11 of the tank body 1. The lower reinforcing band member 21 has a substantially U shape in appearance. The lower reinforcing band member 21 includes a bottom portion 21a and side walls 21b and 21b that rise from both sides in the front-rear direction of the bottom portion 21a (see also FIG. 5). In other words, the lower reinforcing band member 21 has a groove formed by the bottom 21a and the side walls 21b and 21b, and has a constant cross-sectional shape over the entire length. The lower reinforcing band member 21 is continuously disposed across the third side wall 15, the lower wall 11, and the fourth side wall 16.
　４本の上部補強帯部材（補強帯部材）２２は、図１及び図６に示すように、上壁１２の外面に間をあけて前後方向に平行に並設されている。各上部補強帯部材２２は、タンク本体１の上壁１２の各凹部３に配置され一体形成されている。上部補強帯部材２２は、外観視略Ｕ字状を呈する。上部補強帯部材２２は、底部２２ａと、底部２２ａの前後方向両側から立ち上がる側壁２２ｂ，２２ｂとで構成されている。つまり、上部補強帯部材２２には、底部２２ａと、側壁２２ｂ，２２ｂとで凹溝が形成されており、全長に亘って一定の断面形状になっている。上部補強帯部材２２は、第三側壁１５、上壁１２及び第四側壁１６に亘って連続的に配置されている。また、下部補強帯部材２１の上端部と、上部補強帯部材２２の下端部は、第三側壁１５上で離間して配置されている。さらに、下部補強帯部材２１の上端部と、上部補強帯部材２２の下端部は、第四側壁１６上で離間して配置されている。 The four upper reinforcing band members (reinforcing band members) 22 are arranged in parallel in the front-rear direction with a gap on the outer surface of the upper wall 12, as shown in FIGS. Each upper reinforcing band member 22 is disposed and integrally formed in each concave portion 3 of the upper wall 12 of the tank body 1. The upper reinforcing band member 22 has a substantially U shape in appearance. The upper reinforcing band member 22 includes a bottom portion 22a and side walls 22b and 22b that rise from both sides in the front-rear direction of the bottom portion 22a. That is, the upper reinforcing band member 22 has a groove formed by the bottom 22a and the side walls 22b and 22b, and has a constant cross-sectional shape over the entire length. The upper reinforcing band member 22 is continuously disposed across the third side wall 15, the upper wall 12 and the fourth side wall 16. Further, the upper end portion of the lower reinforcing band member 21 and the lower end portion of the upper reinforcing band member 22 are spaced apart from each other on the third side wall 15. Further, the upper end portion of the lower reinforcing band member 21 and the lower end portion of the upper reinforcing band member 22 are arranged on the fourth side wall 16 so as to be separated from each other.
　４本の下部角補強帯部材２３のうち２本の下部角補強帯部材２３は、図１及び図６に示すように、下壁１１と第一側壁１３の角部に対応する凹部５にそれぞれ一体形成されている。下部角補強帯部材２３は外観視略Ｌ字状を呈する。下部角補強帯部材２３は、底部２３ａと、底部２３ａの両側から立ち上がる側壁２３ｂ，２３ｂとで構成されている。つまり、下部角補強帯部材２３には、底部２３ａと側壁２３ｂ，２３ｂとで凹溝が形成されており、全長に亘って一定の断面形状になっている。他の２本の下部角補強帯部材２３は、下壁１１と第二側壁１４の角部に対応する凹部６にそれぞれ一体形成されている。 Of the four lower corner reinforcing band members 23, two lower corner reinforcing band members 23 are respectively formed in the recesses 5 corresponding to the corners of the lower wall 11 and the first side wall 13, as shown in FIGS. 1 and 6. It is integrally formed. The lower corner reinforcing band member 23 has a substantially L shape in appearance. The lower corner reinforcing band member 23 includes a bottom portion 23a and side walls 23b and 23b rising from both sides of the bottom portion 23a. That is, in the lower corner reinforcing band member 23, a groove is formed by the bottom 23a and the side walls 23b, 23b, and has a constant cross-sectional shape over the entire length. The other two lower corner reinforcing band members 23 are integrally formed in the concave portions 6 corresponding to the corner portions of the lower wall 11 and the second side wall 14, respectively.
　４本の上部角補強帯部材２４のうち２本の上部角補強帯部材２４は、図１及び図６に示すように、上壁１２と第一側壁１３の角部に対応する凹部５にそれぞれ一体形成されている。上部角補強帯部材２４は外観視略Ｌ字状を呈する。上部角補強帯部材２４は、底部２４ａと、底部２４ａの両側から立ち上がる側壁２４ｂ，２４ｂとで構成されている。つまり、上部角補強帯部材２４には、底部２４ａと側壁２４ｂ，２４ｂとで凹溝が形成されており、全長に亘って一定の断面形状になっている。他の２本の上部角補強帯部材２４は、上壁１２と第二側壁１４の角部に対応する凹部６にそれぞれ一体形成されている。 Of the four upper corner reinforcing band members 24, two upper corner reinforcing band members 24 are respectively formed in the recesses 5 corresponding to the corners of the upper wall 12 and the first side wall 13, as shown in FIGS. It is integrally formed. The upper corner reinforcing band member 24 has a substantially L shape in appearance. The upper corner reinforcing band member 24 includes a bottom portion 24a and side walls 24b and 24b rising from both sides of the bottom portion 24a. That is, the upper corner reinforcing band member 24 is formed with a concave groove by the bottom 24a and the side walls 24b, 24b, and has a constant cross-sectional shape over the entire length. The other two upper corner reinforcing band members 24 are integrally formed in the recesses 6 corresponding to the corners of the upper wall 12 and the second side wall 14, respectively.
　ここで、本実施形態のように下壁１１及び上壁１２の各面積が、第一側壁１３～第四側壁１６の各面積よりも大きい形状の場合において、燃料タンクＴ内に正圧を付与すると、タンク本体１の下壁１１及び上壁１２に特に大きな正圧が作用する傾向がある。一方、燃料タンクＴ内に負圧を付与すると、第一側壁１３及び第二側壁１４に特に大きな負圧が作用し、第一側壁１３及び第二側壁１４が座屈するおそれがある。 Here, when the areas of the lower wall 11 and the upper wall 12 are larger than the areas of the first side wall 13 to the fourth side wall 16 as in the present embodiment, positive pressure is applied to the fuel tank T. Then, a particularly large positive pressure tends to act on the lower wall 11 and the upper wall 12 of the tank body 1. On the other hand, when a negative pressure is applied to the fuel tank T, a particularly large negative pressure acts on the first side wall 13 and the second side wall 14 and the first side wall 13 and the second side wall 14 may be buckled.
　本実施形態では、下壁１１の左右方向に延設される４本の下部補強帯部材２１が設置されるとともに、上壁１２の左右方向に延設される４本の上部補強帯部材２２が設置されるため、特に、燃料タンクＴに作用する正圧に対して効率良く補強することができる。 In the present embodiment, four lower reinforcing band members 21 extending in the left-right direction of the lower wall 11 are installed, and four upper reinforcing band members 22 extending in the left-right direction of the upper wall 12 are provided. Since it is installed, in particular, it is possible to efficiently reinforce the positive pressure acting on the fuel tank T.
　一方、本実施形態では、第一側壁１３と下壁１１との角部に下部角補強帯部材２３，２３が設置され、第一側壁１３と上壁１２との角部に上部角補強帯部材２４，２４が設置されるため、特に、第一側壁１３に作用する負圧に対して効率良く補強することができる。また、第二側壁１４と下壁１１との角部に下部角補強帯部材２３，２３が設置され、第二側壁１４と上壁１２との角部に上部角補強帯部材２４，２４が設置されるため、特に、第二側壁１４に作用する負圧に対して効率良く補強することができる。 On the other hand, in this embodiment, the lower corner reinforcing band members 23 and 23 are installed at the corners of the first side wall 13 and the lower wall 11, and the upper corner reinforcing band members are formed at the corners of the first side wall 13 and the upper wall 12. Since 24 and 24 are installed, in particular, it is possible to efficiently reinforce the negative pressure acting on the first side wall 13. Further, lower corner reinforcing band members 23 and 23 are installed at the corners of the second side wall 14 and the lower wall 11, and upper corner reinforcing band members 24 and 24 are installed at the corners of the second side wall 14 and the upper wall 12. Therefore, in particular, the negative pressure acting on the second side wall 14 can be efficiently reinforced.
　なお、補強帯部材群２は、下部補強帯部材２１及び上部補強帯部材２２が少なくとも一対設けられていればよい。また、下部補強帯部材２１及び上部補強帯部材２２の配置は、本実施形態に限定されるものではなく、適宜設計変更が可能である。例えば、下部補強帯部材２１及び上部補強帯部材２２は、対応する位置ではなく、互い違いになるように配置してもよい。また、下部補強帯部材２１は、第一側壁１３、下壁１１及び第二側壁１４に連続して配置してもよい。また、上部補強帯部材２２も、第一側壁１３、上壁１２及び第二側壁１４に連続して配置してもよい。さらに、下部補強帯部材２１及び上部補強帯部材２２が、平面視してクロス状に配置してもよい。 The reinforcing band member group 2 only needs to be provided with at least one pair of the lower reinforcing band member 21 and the upper reinforcing band member 22. Further, the arrangement of the lower reinforcing band member 21 and the upper reinforcing band member 22 is not limited to the present embodiment, and the design can be changed as appropriate. For example, the lower reinforcing band member 21 and the upper reinforcing band member 22 may be arranged in a staggered manner instead of corresponding positions. Further, the lower reinforcing band member 21 may be disposed continuously to the first side wall 13, the lower wall 11, and the second side wall 14. Further, the upper reinforcing band member 22 may also be disposed continuously with the first side wall 13, the upper wall 12 and the second side wall 14. Further, the lower reinforcing band member 21 and the upper reinforcing band member 22 may be arranged in a cross shape in plan view.
　同様に、下部角補強帯部材２３及び上部角補強帯部材２４は、対応する位置ではなく、互い違いになるように配置してもよい。下部角補強帯部材２３は、下壁１１と第三側壁１５との角部、又は、下壁１１と第四側壁１６との角部に配置してもよい。また、上部角補強帯部材２４は、上壁１２と第三側壁１５との角部、又は、上壁１２と第四側壁１６との角部に配置してもよい。また、下部角補強帯部材２３及び上部角補強帯部材２４は省略してもよい。また、下部補強帯部材２１、上部補強帯部材２２、下部角補強帯部材２３及び上部角補強帯部材２４はいずれも断面凹状に形成したが、断面半円状、断面三角形状、板状等他の形状であってもよい。 Similarly, the lower corner reinforcing band member 23 and the upper corner reinforcing band member 24 may be arranged to be staggered instead of corresponding positions. The lower corner reinforcing band member 23 may be disposed at the corner between the lower wall 11 and the third side wall 15 or at the corner between the lower wall 11 and the fourth side wall 16. Further, the upper corner reinforcing band member 24 may be disposed at the corner between the upper wall 12 and the third side wall 15 or at the corner between the upper wall 12 and the fourth side wall 16. Further, the lower corner reinforcing band member 23 and the upper corner reinforcing band member 24 may be omitted. Further, the lower reinforcing band member 21, the upper reinforcing band member 22, the lower corner reinforcing band member 23, and the upper corner reinforcing band member 24 are all formed in a concave cross section, but the semicircular cross section, triangular cross section, plate shape, etc. The shape may also be
　次に、燃料タンクの製造方法について説明する。燃料タンクの製造方法では、積層体形成工程と、補強帯部材成形工程と、配置工程と、燃料タンク成形工程と、を主に行う。 Next, a method for manufacturing a fuel tank will be described. In the method for manufacturing a fuel tank, a laminated body forming step, a reinforcing band member forming step, an arranging step, and a fuel tank forming step are mainly performed.
　積層体形成工程は、図７に示すように、複数の繊維基材３１と複数の樹脂フィルム３２とを重ね合わせて積層体３３を形成する工程である。繊維基材３１は、炭素繊維、ガラス繊維、樹脂繊維等で形成された薄いシートである。各繊維基材３１は、繊維の配向角度が異なるようにして積層させる。樹脂フィルム３２は、熱可塑性樹脂（高密度ポリエチレン、ポリエチレン、ナイロン等）又は熱硬化性樹脂（フェノール樹脂、エポキシ樹脂等）で形成された薄いフィルムである。樹脂フィルム３２，３２は、繊維基材３１を挟むように積層する。積層体３３は、繊維基材３１の内部に、溶融した樹脂フィルム３２が含浸して所定の強度を発現するとともに、後記する燃料タンク成形工程の際に所定の温度で溶融してタンク本体１と溶着するように適宜設定する。また、積層体３３は、後記する補強帯部材成形工程の際に所定の温度で変形して、各補強帯部材が形成されるように適宜設定する。 The laminated body forming step is a step of forming a laminated body 33 by overlapping a plurality of fiber base materials 31 and a plurality of resin films 32 as shown in FIG. The fiber substrate 31 is a thin sheet formed of carbon fiber, glass fiber, resin fiber, or the like. Each fiber base material 31 is laminated so that the fiber orientation angles are different. The resin film 32 is a thin film formed of a thermoplastic resin (high density polyethylene, polyethylene, nylon, etc.) or a thermosetting resin (phenol resin, epoxy resin, etc.). The resin films 32 and 32 are laminated so as to sandwich the fiber base material 31 therebetween. The laminated body 33 is impregnated with the melted resin film 32 inside the fiber base material 31 to express a predetermined strength, and is melted at a predetermined temperature during a fuel tank molding process to be described later. It sets suitably so that it may weld. Further, the laminated body 33 is appropriately set so that each reinforcing band member is formed by being deformed at a predetermined temperature during a reinforcing band member forming step described later.
　なお、積層体３３は適宜設計変更が可能である。例えば、基材ごとに異なる材料からなる繊維基材３１を積層させてもよい。また、異なる材料からなる各樹脂フィルム３２を積層させてもよい。具体的には、樹脂フィルム３２は最外層をタンク本体１との溶着性が良好な熱可塑性樹脂にして、内部層を繊維基材３１に対する含浸性が良好な熱硬化性樹脂とするのが好ましい。積層体３３を構成する材料および積層順は、タンク本体１の材料との接着性および積層体３３が発揮する強度特性（繊維基材３１と樹脂フィルム３２とのマッチング）を考慮して適宜設定するのが好ましい。また、積層順についても、繊維基材３１と樹脂フィルム３２とを交互に積層させる構成に限定されず、繊維基材３１に対する含浸性の良好な熱硬化性の樹脂フィルム３２とタンク本体１との溶着性が良好な熱可塑性の樹脂フィルム３２を隣接して積層してもよい。 The design of the laminate 33 can be changed as appropriate. For example, you may laminate the fiber base material 31 which consists of a different material for every base material. Moreover, you may laminate | stack each resin film 32 which consists of a different material. Specifically, it is preferable that the resin film 32 is made of a thermoplastic resin having a good weldability with the tank body 1 as an outermost layer and a thermosetting resin having a good impregnation property with respect to the fiber substrate 31. . The material constituting the laminated body 33 and the order of lamination are appropriately set in consideration of the adhesiveness with the material of the tank body 1 and the strength characteristics (matching between the fiber base material 31 and the resin film 32) exhibited by the laminated body 33. Is preferred. Further, the stacking order is not limited to the configuration in which the fiber base material 31 and the resin film 32 are alternately stacked, and the thermosetting resin film 32 and the tank body 1 having good impregnation with respect to the fiber base material 31 are included. A thermoplastic resin film 32 having good weldability may be laminated adjacently.
　補強帯部材成形工程は、下部補強帯部材２１、上部補強帯部材２２、下部角補強帯部材２３及び上部角補強帯部材２４をそれぞれ成形する工程である。補強帯部材成形工程は、図８に示すように、下型Ｋ１及び上型Ｋ２で構成された補強帯用成形型Ｋを用いて成形する。下型Ｋ１及び上型Ｋ２には、温度調整が可能な温度調節部Ｍがそれぞれ形成されている。補強帯部材成形工程では、積層体３３を下型Ｋ１及び上型Ｋ２で挟み込んで、所定の温度で加熱し、例えば、図９に示す下部補強帯部材２１を成形する。 The reinforcing band member forming step is a step of forming the lower reinforcing band member 21, the upper reinforcing band member 22, the lower corner reinforcing band member 23, and the upper corner reinforcing band member 24, respectively. In the reinforcing band member forming step, as shown in FIG. 8, the reinforcing band member is formed using a reinforcing band forming die K constituted by a lower die K1 and an upper die K2. The lower mold K1 and the upper mold K2 are each formed with a temperature adjustment unit M capable of adjusting the temperature. In the reinforcing band member forming step, the laminate 33 is sandwiched between the lower mold K1 and the upper mold K2 and heated at a predetermined temperature, for example, to form the lower reinforcing band member 21 shown in FIG.
　配置工程は、図１０に示すように、燃料タンク用成形型Ｊに補強帯部材群２を配置する工程である。燃料タンク用成形型Ｊは、ロワー側を成形する一方型Ｊ１と、アッパー側を成形する他方型Ｊ２とを有する。燃料タンク用成形型Ｊの一方型Ｊ１及び他方型Ｊ２には、それぞれ設置凸部Ｊ１ａ，Ｊ１ｂが形成されている。設置凸部Ｊ１ａは、一方型Ｊ１及び他方型Ｊ２の底面に所定の間隔をあけてそれぞれ形成されている。設置凸部Ｊ１ａは、下部補強帯部材２１又は上部補強帯部材２２が配置される部位であって、断面略矩形に形成されている。設置凸部Ｊ１ａは、タンク本体１の凹部３を成形する部位でもある。 The placement step is a step of placing the reinforcing band member group 2 on the fuel tank mold J as shown in FIG. The fuel tank molding die J has a first die J1 that molds the lower side and a second die J2 that molds the upper side. Installation convex portions J1a and J1b are formed on the one mold J1 and the other mold J2 of the fuel tank mold J, respectively. The installation convex portions J1a are formed on the bottom surfaces of the one mold J1 and the other mold J2 with a predetermined gap therebetween. The installation convex portion J1a is a portion where the lower reinforcing belt member 21 or the upper reinforcing belt member 22 is disposed, and is formed in a substantially rectangular cross section. The installation convex part J1a is also a part for molding the concave part 3 of the tank body 1.
　設置凸部Ｊ１ｂは、一方型Ｊ１及び他方型Ｊ２の角部にそれぞれ形成されている。設置凸部Ｊ１ｂは、下部角補強帯部材２３及び上部角補強帯部材２４が配置される部位であって、断面略矩形に形成されている。設置凸部Ｊ１ｂは、タンク本体１の凹部５，６をそれぞれ成形する部位でもある。 The installation convex part J1b is formed in the corner | angular part of one type | mold J1 and the other type | mold J2, respectively. The installation convex portion J1b is a portion where the lower corner reinforcing band member 23 and the upper corner reinforcing band member 24 are disposed, and is formed in a substantially rectangular cross section. The installation protrusion J1b is also a part for forming the recesses 5 and 6 of the tank body 1 respectively.
　配置工程では、一方型Ｊ１の各設置凸部Ｊ１ａに各下部補強帯部材２１を配置するとともに、各設置凸部Ｊ１ｂに各下部角補強帯部材２３を配置する。また、配置工程では、他方型Ｊ２の各設置凸部Ｊ１ａに各上部補強帯部材２２を配置するとともに、各設置凸部Ｊ１ｂに各下部角補強帯部材２３を配置する。一方型Ｊ１及び他方型Ｊ２は所定の温度に予め加熱されているため、補強帯部材群２を配置すると補強帯部材群２と一方型Ｊ１及び他方型Ｊ２とが落下しない程度に張り付いた状態になる。 In the arranging step, the lower reinforcing band members 21 are arranged on the installation protrusions J1a of the one-sided J1, and the lower corner reinforcing band members 23 are arranged on the installation protrusions J1b. Further, in the arranging step, each upper reinforcing band member 22 is arranged on each installation convex portion J1a of the other mold J2, and each lower corner reinforcing band member 23 is arranged on each installation convex portion J1b. Since the one mold J1 and the other mold J2 are preheated to a predetermined temperature, when the reinforcing band member group 2 is disposed, the reinforcing band member group 2 and the one mold J1 and the other mold J2 are attached so as not to fall. become.
　燃料タンク成形工程は、図１０及び図１１に示すように、燃料タンク用成形型Ｊで燃料タンクＴをブロー成形する工程である。燃料タンク成形工程では、一方型Ｊ１と他方型Ｊ２との間に筒状又はシート状のパリソンＰ（図１０）をダイＤから吐出させる。パリソンＰは、例えば、内部にバリア層を含んで複数層で構成された熱可塑性樹脂である。燃料タンク用成形型Ｊは、パリソンＰが塑性変形するように所定の温度まで予め加熱させておく。 The fuel tank molding step is a step of blow molding the fuel tank T with a fuel tank mold J as shown in FIGS. In the fuel tank forming step, a cylindrical or sheet-like parison P (FIG. 10) is discharged from the die D between the one mold J1 and the other mold J2. The parison P is, for example, a thermoplastic resin composed of a plurality of layers including a barrier layer inside. The fuel tank mold J is preheated to a predetermined temperature so that the parison P is plastically deformed.
　そして、図１１に示すように、一方型Ｊ１及び他方型Ｊ２を型締めしつつ、内部にエアーを供給してブロー成形する。パリソンＰは、燃料タンク用成形型Ｊの成形面に転写されるとともに、パリソンＰと補強帯部材群２（下部補強帯部材２１、上部補強帯部材２２、下部角補強帯部材２３及び上部角補強帯部材２４）とが溶着して一体化する。なお、一方型Ｊ１及び他方型Ｊ２に設けられた真空引き手段を用いてパリソンＰを吸引し、パリソンＰを燃料タンク用成形型Ｊに転写させてもよい。所定の時間が経過したら脱型し、燃料タンクＴを取り出す。 Then, as shown in FIG. 11, while the one mold J1 and the other mold J2 are clamped, air is supplied to the inside to perform blow molding. The parison P is transferred to the molding surface of the fuel tank mold J, and the parison P and the reinforcing band member group 2 (lower reinforcing band member 21, upper reinforcing band member 22, lower corner reinforcing band member 23 and upper corner reinforcing member). The belt member 24) is welded and integrated. Alternatively, the parison P may be sucked using the vacuuming means provided in the one mold J1 and the other mold J2, and the parison P may be transferred to the fuel tank mold J. When a predetermined time has elapsed, the mold is removed and the fuel tank T is taken out.
　以上説明した燃料タンクＴ及び燃料タンクの製造方法によれば、タンク本体１を補強帯部材群２で効率良く補強することができる。より詳しくは、下壁１１及び上壁１２に、それぞれ下部補強帯部材２１及び上部補強帯部材２２を設置することで、大きな正圧が作用する下壁１１及び上壁１２を効率良く補強することができる。特に、下部補強帯部材２１は、第三側壁１５、下壁１１及び第四側壁１６に亘って連続して形成されているため、補強効率を高めることができる。同様に、上部補強帯部材２２は、第三側壁１５、上壁１２及び第四側壁１６に亘って連続して形成されているため、補強効率を高めることができる。 According to the fuel tank T and the fuel tank manufacturing method described above, the tank body 1 can be efficiently reinforced by the reinforcing band member group 2. More specifically, the lower reinforcing member 21 and the upper reinforcing member 22 are installed on the lower wall 11 and the upper wall 12 respectively, thereby efficiently reinforcing the lower wall 11 and the upper wall 12 on which a large positive pressure acts. Can do. In particular, since the lower reinforcing band member 21 is formed continuously over the third side wall 15, the lower wall 11, and the fourth side wall 16, the reinforcement efficiency can be increased. Similarly, since the upper reinforcement belt member 22 is continuously formed over the third side wall 15, the upper wall 12, and the fourth side wall 16, the reinforcement efficiency can be increased.
　また、下部角補強帯部材２３及び上部角補強帯部材２４を設けることで、大きな負圧が作用する第一側壁１３及び第二側壁１４を補強することができる。特に、下部角補強帯部材２３は、第一側壁１３と下壁１１とに亘って連続して形成されるとともに、第二側壁１４と下壁１１とに亘って連続して形成されているため、補強効率を高めることができる。同様に、上部角補強帯部材２４は、第一側壁１３と上壁１２に亘って連続して形成されるとともに、第二側壁１４と上壁１２に亘って連続して形成されているため、補強効率を高めることができる。 Further, by providing the lower corner reinforcing band member 23 and the upper corner reinforcing band member 24, the first side wall 13 and the second side wall 14 on which a large negative pressure acts can be reinforced. In particular, the lower corner reinforcing band member 23 is formed continuously over the first side wall 13 and the lower wall 11 and is formed continuously over the second side wall 14 and the lower wall 11. The reinforcement efficiency can be increased. Similarly, the upper corner reinforcing band member 24 is formed continuously over the first side wall 13 and the upper wall 12 and continuously formed over the second side wall 14 and the upper wall 12. The reinforcement efficiency can be increased.
　また、従来のように燃料タンクの全周に繊維強化樹脂を設けると、材料コストが嵩むという問題があったが、本実施形態によれば、正圧又は負圧が大きく作用する部位を効率よく補強することで、材料コストを低減することができる。 In addition, when fiber reinforced resin is provided on the entire circumference of the fuel tank as in the prior art, there has been a problem that the material cost increases, but according to the present embodiment, the site where the positive pressure or the negative pressure acts greatly can be efficiently obtained. By reinforcing, material cost can be reduced.
　また、タンク本体１の外面には、凹部３，５，６が形成されているため、タンク本体１の強度及び剛性を高めることができる。また、補強帯部材群２（下部補強帯部材２１、上部補強帯部材、下部角補強帯部材２３及び上部角補強帯部材２４）は、凹部３，５，６内に一体形成されるとともに、凹部３，５，６の形状に沿うように底部と一対の側壁とで構成されているため、補強効率を相乗的に高めることができる。 Moreover, since the recesses 3, 5, and 6 are formed on the outer surface of the tank body 1, the strength and rigidity of the tank body 1 can be increased. In addition, the reinforcing band member group 2 (the lower reinforcing band member 21, the upper reinforcing band member, the lower corner reinforcing band member 23, and the upper corner reinforcing band member 24) is integrally formed in the recesses 3, 5, and 6 and Since it is comprised by the bottom part and a pair of side wall so that the shape of 3,5,6 may be followed, reinforcement efficiency can be raised synergistically.
　また、下部補強帯部材２１及び上部補強帯部材２２は、上下に対応する位置にそれぞれ配置されているため、燃料タンクＴの強度をバランスよく高めることができる。また、下部補強帯部材２１及び上部補強帯部材２２は、間をあけてそれぞれ平行に配置されているため、燃料タンクＴの強度をバランスよく高めることができる。 Further, since the lower reinforcing band member 21 and the upper reinforcing band member 22 are respectively arranged at positions corresponding to the upper and lower sides, the strength of the fuel tank T can be increased in a well-balanced manner. Further, since the lower reinforcing band member 21 and the upper reinforcing band member 22 are arranged in parallel with a gap therebetween, the strength of the fuel tank T can be increased in a well-balanced manner.
　また、上下に対向する下部補強帯部材２１と上部補強帯部材２２の両端、及び、下部角補強帯部材２３と上部角補強帯部材２４の端部は、第一側壁１３、第二側壁１４、第三側壁１５及び第四側壁１６の上下方向の中央部において互いに離間して配置されている。換言すると、下部補強帯部材２１と上部補強帯部材２２の両端、及び、下部角補強帯部材２３と上部角補強帯部材２４の端部は、タンク本体１のパーティングラインを挟んで離間するように配置されている。これにより、燃料タンクＴの強度をバランスよく高めることができる。また、燃料タンク成形工程において、対向する各補強帯部材が干渉することなく成形することができる。 Further, both ends of the lower reinforcing band member 21 and the upper reinforcing band member 22 which are vertically opposed to each other, and the end portions of the lower corner reinforcing band member 23 and the upper corner reinforcing band member 24 are the first side wall 13, the second side wall 14, The third side wall 15 and the fourth side wall 16 are spaced apart from each other at the center in the vertical direction. In other words, both ends of the lower reinforcing band member 21 and the upper reinforcing band member 22 and the ends of the lower corner reinforcing band member 23 and the upper corner reinforcing band member 24 are spaced apart with the parting line of the tank body 1 interposed therebetween. Is arranged. Thereby, the intensity | strength of the fuel tank T can be raised with sufficient balance. Further, in the fuel tank forming step, the opposing reinforcing band members can be formed without interference.
　また、配置工程では、補強帯部材群２を、燃料タンク用成形型Ｊに設けられた設置凸部Ｊ１ａ及び設置凸部Ｊ１ｂに配置させるため、成形時に補強帯部材群２の位置ずれを防ぐことができる。また、燃料タンク成形工程では、補強帯部材群２をブロー成形中にパリソンＰに溶着させるため、容易に一体成形できるとともにタンク本体１と補強帯部材群２との間の段差も小さくすることができる。 Further, in the arranging step, the reinforcing band member group 2 is arranged on the installation convex portion J1a and the installation convex portion J1b provided in the fuel tank mold J, so that the positional displacement of the reinforcing band member group 2 is prevented at the time of molding. Can do. Further, in the fuel tank molding process, the reinforcing band member group 2 is welded to the parison P during blow molding, so that it can be easily integrally molded and the step between the tank body 1 and the reinforcing band member group 2 can be reduced. it can.
　また、タンク本体１の第三側壁１５及び第四側壁１６は、側方に突出する円弧状を呈する。これにより、第三側壁１５及び第四側壁１６の外側から作用する外力に対する強度を高めることができる。なお、第一側壁１３及び第二側壁１４を側方に突出する円弧状となるように形成してもよい。 Further, the third side wall 15 and the fourth side wall 16 of the tank main body 1 have an arc shape protruding sideways. Thereby, the intensity | strength with respect to the external force which acts from the outer side of the 3rd side wall 15 and the 4th side wall 16 can be raised. In addition, you may form so that the 1st side wall 13 and the 2nd side wall 14 may become circular arc shape which protrudes to a side.
［第二実施形態］
　次に、図１２に示すように、本発明の第二実施形態に係る燃料タンクＴＡについて説明する。燃料タンクＴＡは、開口部１７、接続補強帯部材２５，２５及び補助補強帯部材２６，２６を備える点で第一実施形態と主に相違する。第二実施形態では、第一実施形態と相違する部分を中心に説明する。 [Second Embodiment]
Next, as shown in FIG. 12, a fuel tank TA according to a second embodiment of the present invention will be described. The fuel tank TA is mainly different from the first embodiment in that the fuel tank TA includes the opening 17, the connection reinforcing belt members 25, 25, and the auxiliary reinforcing belt members 26, 26. In the second embodiment, the description will focus on the parts that are different from the first embodiment.
　第一側壁１３には、凹部５、下部角補強帯部材２３及び上部角補強帯部材２４がそれぞれ３つずつ形成されている。また、第二側壁１４には、凹部６、下部角補強帯部材２３及び上部角補強帯部材２４がそれぞれ３つずつ形成されている。 The first side wall 13 is formed with three recesses 5, lower corner reinforcing band members 23, and three upper corner reinforcing band members 24, respectively. The second side wall 14 is formed with three recesses 6, three lower corner reinforcing band members 23 and three upper corner reinforcing band members 24, respectively.
　タンク本体１の上壁１２の中央には、円形の開口部１７が形成されている。開口部１７は、例えば、ポンプモジュール（図示省略）等の内蔵部品が設置される部位である。上壁１２には、開口部１７を挟んで、両端の凹部３，３にそれぞれ接続される凹部７，７が形成されている。凹部７，７は、前後方向に延設されており、断面矩形を呈し上方に開放している。凹部７，７は、凹部３，３に対して垂直に形成されている。 A circular opening 17 is formed at the center of the upper wall 12 of the tank body 1. The opening 17 is a part where a built-in component such as a pump module (not shown) is installed. The upper wall 12 has recesses 7 and 7 connected to the recesses 3 and 3 at both ends with the opening 17 interposed therebetween. The recesses 7 and 7 extend in the front-rear direction, have a rectangular cross section, and open upward. The recesses 7 and 7 are formed perpendicular to the recesses 3 and 3.
　接続補強帯部材２５は、凹部７の内部に配置され、凹部７と一体形成されている。接続補強帯部材２５は、底部２５ａと、底部２５ａの両端から立ち上がる側壁２５ｂ，２５ｂとで構成されている。接続補強帯部材２５及び凹部７はそれぞれ、隣り合う上部補強帯部材２２，２２及び凹部３に接続されている。接続補強帯部材２５，２５は、燃料タンク成形工程時に重ね合わされることにより上部補強帯部材２２，２２にもそれぞれ溶着し一体形成されている。なお、接続補強帯部材２５，２５は、補強帯部材成形工程において上部補強帯部材２２，２２と予め一体形成させてもよい。 The connection reinforcing belt member 25 is disposed inside the recess 7 and is integrally formed with the recess 7. The connection reinforcing belt member 25 includes a bottom portion 25a and side walls 25b and 25b rising from both ends of the bottom portion 25a. The connection reinforcing belt member 25 and the concave portion 7 are connected to the adjacent upper reinforcing belt members 22, 22 and the concave portion 3, respectively. The connection reinforcing band members 25 and 25 are integrally formed by welding to the upper reinforcing band members 22 and 22 by being overlapped during the fuel tank forming process. The connection reinforcing band members 25 and 25 may be integrally formed with the upper reinforcing band members 22 and 22 in advance in the reinforcing band member forming step.
　補助補強帯部材２６は、真ん中の凹部３の内部に配置され、凹部３と一体形成されている。右側の補助補強帯部材２６は、右側の接続補強帯部材２５から、第三側壁１５の中央部まで形成されている。左側の補助補強帯部材２６は、左側の接続補強帯部材２５から第四側壁１６の中央部まで形成されている。補助補強帯部材２６は、底部２６ａと、底部２６ａの両端から立ち上がる側壁２６ｂ，２６ｂとで構成されている。補助補強帯部材２６，２６は、燃料タンク成形工程時に重ね合わされることにより接続補強帯部材２５，２５にもそれぞれ溶着し一体形成されている。なお、補助補強帯部材２６，２６は、補強帯部材成形工程において接続補強帯部材２５，２５と予め一体形成させてもよい。 The auxiliary reinforcing belt member 26 is disposed inside the middle recess 3 and is integrally formed with the recess 3. The right auxiliary reinforcing belt member 26 is formed from the right connecting reinforcing belt member 25 to the center of the third side wall 15. The left auxiliary reinforcing band member 26 is formed from the left connecting reinforcing band member 25 to the center of the fourth side wall 16. The auxiliary reinforcing belt member 26 includes a bottom portion 26a and side walls 26b and 26b rising from both ends of the bottom portion 26a. The auxiliary reinforcing band members 26 and 26 are integrally formed by being welded to the connecting reinforcing band members 25 and 25, respectively, by being overlapped during the fuel tank forming process. The auxiliary reinforcing band members 26 and 26 may be integrally formed with the connection reinforcing band members 25 and 25 in advance in the reinforcing band member forming step.
　以上説明した第二実施形態に係る燃料タンクＴによっても第一実施形態と略同等の効果を奏することができる。また、上部補強帯部材２２，２２に接続される接続補強帯部材２５，２５を備えることにより、前後方向の強度も高めることができる。また、接続補強帯部材２５，２５を備えることにより、開口部１７周りのように、強度を高めたい部分を局所的に補強することもできる。 The fuel tank T according to the second embodiment described above can also provide substantially the same effect as the first embodiment. Moreover, the strength in the front-rear direction can be increased by providing the connection reinforcing band members 25, 25 connected to the upper reinforcing band members 22, 22. Further, by providing the connection reinforcing band members 25, 25, it is possible to locally reinforce a portion where the strength is to be increased, such as around the opening 17.
［変形例］
　図１３は、積層体形成工程の変形例を示す概略断面図である。図１４は、補強帯部材の変形例を示す概略断面図である。図１３に示すように、補強帯部材成形工程では、下型Ｋ１と上型Ｋ２とで積層体３３を挟んで成形するものであるが、積層体３３の一部に補助積層体４１を設けて複合積層体４２を形成してもよい。補助積層体４１は、積層体３３の一部に厚みが増すように積層して設けられている。補助積層体４１は、積層体３３から離間するに従って徐々に短くなるように（図１３中の左右方向長さが短くなるように）配置されている。 [Modification]
FIG. 13 is a schematic cross-sectional view showing a modified example of the laminated body forming step. FIG. 14 is a schematic cross-sectional view showing a modification of the reinforcing band member. As shown in FIG. 13, in the reinforcing band member forming step, the lower body K <b> 1 and the upper mold K <b> 2 are sandwiched and formed with the laminated body 33, but the auxiliary laminated body 41 is provided in a part of the laminated body 33. A composite laminate 42 may be formed. The auxiliary laminated body 41 is provided so as to be laminated on a part of the laminated body 33 so that the thickness is increased. The auxiliary laminated body 41 is disposed so as to be gradually shortened as it is separated from the laminated body 33 (so that the lateral length in FIG. 13 is shortened).
　図１４に示すように、図１３の複合積層体４２によって補強帯部材２Ａが形成される。補強帯部材２Ａは、外側の角部の厚さが他の部位よりも大きくなっている。ここで、補強帯部材の一部の強度を高める場合、積層体全体の厚みを増加させると、補強が不要な部位の厚さも大きくなってしまい不経済である。しかし、当該変形例のように、補助積層体４１を所定の位置に配置することにより、補強帯部材２Ａの厚みを局所的に増加させて効率的に強度を高めることができる。つまり、補強帯部材は、燃料タンクＴの用途に応じてその厚みが異なるように適宜形成してもよい。また、補助積層体４１を積層体３３から離間するに従って徐々に短くなるように形成することにより、成形後に角部の外面の段差が大きくなるのを防ぐことができる。 As shown in FIG. 14, the reinforcing band member 2A is formed by the composite laminate 42 of FIG. In the reinforcing band member 2A, the thickness of the outer corner is larger than that of other portions. Here, in the case where the strength of a part of the reinforcing band member is increased, if the thickness of the entire laminate is increased, the thickness of a portion that does not require reinforcement is increased, which is uneconomical. However, as in the modification example, by arranging the auxiliary laminated body 41 at a predetermined position, the strength of the reinforcing band member 2A can be locally increased and the strength can be efficiently increased. That is, the reinforcing band member may be appropriately formed so that its thickness varies depending on the application of the fuel tank T. Further, by forming the auxiliary laminated body 41 so as to be gradually shortened as it is separated from the laminated body 33, it is possible to prevent a step on the outer surface of the corner from becoming large after molding.
　以上発明の実施形態及び変形例について説明したが、本発明の趣旨に反しない範囲において適宜設計変更が可能である。本実施形態では、第一側壁１３、第二側壁１４、第三側壁１５及び第四側壁１６の中央部で各補強帯部材がそれぞれ離間するように形成したが、重複させてもよい。 Although the embodiments and modifications of the invention have been described above, design changes can be made as appropriate without departing from the spirit of the invention. In the present embodiment, the reinforcing band members are formed so as to be separated from each other at the central portions of the first side wall 13, the second side wall 14, the third side wall 15, and the fourth side wall 16, but they may be overlapped.
　１　　　タンク本体
　２　　　補強帯部材群
　３　　　凹部
　５　　　凹部
　６　　　凹部
　１１　　下壁
　１２　　上壁
　１３　　第一側壁
　１４　　第二側壁
　１５　　第三側壁
　１６　　第四側壁
　１７　　開口部
　２１　　下部補強帯部材（補強帯部材）
　２２　　上部補強帯部材（補強帯部材）
　２３　　下部角補強帯部材（角補強帯部材）
　２４　　上部角補強帯部材（角補強帯部材）
　２６　　接続補強帯部材
　２７　　補助補強帯部材
　Ｔ　　　燃料タンク DESCRIPTION OF SYMBOLS 1 Tank main body 2 Reinforcement band member group 3 Recessed part 5 Recessed part 6 Recessed part 11 Lower wall 12 Upper wall 13 First side wall 14 Second side wall 15 Third side wall 16 Fourth side wall 17 Opening part 21 Lower reinforcing band member (reinforcing band member)
22 Upper reinforcement band member (Reinforcement band member)
23 Lower corner reinforcement band member (corner reinforcement band member)
24 Upper corner reinforcement band member (corner reinforcement band member)
26 Connection reinforcement belt member 27 Auxiliary reinforcement belt member T Fuel tank

Claims (9)

  1. 　下壁、上壁及び側壁とを含んだ樹脂製のタンク本体の外面に、繊維強化樹脂で形成された複数の補強帯部材を一体的に備える燃料タンクであって、
    　前記補強帯部材は、前記下壁及び対向する一対の前記側壁に亘って連続的に形成されているとともに、前記上壁及び対向する一対の前記側壁に亘って連続的に形成されていることを特徴とする燃料タンク。     A fuel tank that integrally includes a plurality of reinforcing belt members formed of fiber reinforced resin on the outer surface of a resin tank body including a lower wall, an upper wall, and a side wall,
    The reinforcing belt member is formed continuously over the lower wall and the pair of opposing side walls, and continuously formed over the upper wall and the pair of opposing side walls. Features fuel tank.
  2. 　前記タンク本体の外面に断面凹状を呈する凹部を有し、
    　前記補強帯部材は、前記凹部内に形成されるとともに当該凹部に沿うように底部と、前記底部の両端から立ち上がる一対の側壁とを有することを特徴とする請求項１に記載の燃料タンク。     The outer surface of the tank body has a concave portion having a concave cross section,
    2. The fuel tank according to claim 1, wherein the reinforcing band member has a bottom portion formed along the concave portion and a pair of side walls rising from both ends of the bottom portion.
  3. 　前記上壁の前記補強帯部材及び下壁の前記補強帯部材は、端部同士がそれぞれ前記側壁の中央部で臨むように配置されていることを特徴とする請求項１又は請求項２に記載の燃料タンク。 3. The reinforcing band member of the upper wall and the reinforcing band member of the lower wall are arranged so that ends thereof face each other at the center portion of the side wall. Fuel tank.
  4. 　前記補強帯部材は、間隔をあけて複数並設されていることを特徴とする請求項１に記載の燃料タンク。 2. The fuel tank according to claim 1, wherein a plurality of the reinforcing band members are arranged in parallel at intervals.
  5. 　隣り合う当該補強帯部材を接続する接続補強帯部材を有することを特徴とする請求項１に記載の燃料タンク。 2. The fuel tank according to claim 1, further comprising a connection reinforcing band member that connects adjacent reinforcing band members.
  6. 　前記タンク本体の側壁は、側方に突出する円弧状を呈することを特徴とする請求項１に記載の燃料タンク。 The fuel tank according to claim 1, wherein the side wall of the tank body has an arc shape protruding sideways.
  7. 　前記下壁と当該下壁に隣接する前記側壁とで構成される角部、及び、前記上壁と当該上壁に隣接する前記側壁とで構成される角部にそれぞれ形成される角補強帯部材を有することを特徴とする請求項１に記載の燃料タンク。 A corner reinforcing band member formed at each of a corner portion constituted by the lower wall and the side wall adjacent to the lower wall, and a corner portion constituted by the upper wall and the side wall adjacent to the upper wall. The fuel tank according to claim 1, comprising:
  8. 　前記タンク本体は、熱可塑性樹脂で形成されており、
    　前記補強帯部材は、複数の繊維基材と複数の樹脂フィルムとを積層させて形成されており、
    　前記補強帯部材の最外層は、熱可塑性の樹脂フィルムで形成されていることを特徴とする請求項１に記載の燃料タンク。     The tank body is formed of a thermoplastic resin,
    The reinforcing band member is formed by laminating a plurality of fiber base materials and a plurality of resin films,
    2. The fuel tank according to claim 1, wherein the outermost layer of the reinforcing band member is formed of a thermoplastic resin film.
  9. 　前記補強帯部材の角部は他の部位に対して厚く形成されていることを特徴する請求項１に記載の燃料タンク。 2. The fuel tank according to claim 1, wherein a corner portion of the reinforcing band member is formed thicker than other portions.
PCT/JP2017/041776 2017-01-13 2017-11-21 Fuel tank WO2018131295A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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CN114450183A (en) * 2019-09-20 2022-05-06 考特克斯·特克斯罗恩有限公司及两合公司 Plastic container for motor vehicles with at least one reinforcing structure

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JP5608287B2 (en) * 2010-07-13 2014-10-15 コーテックス テクストロン ジーエムビーエイチ アンド シーオー ケージー Resin fuel tank and its manufacturing method

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Publication number Priority date Publication date Assignee Title
JP2020093673A (en) * 2018-12-13 2020-06-18 株式会社Fts Fuel tank
JP7224164B2 (en) 2018-12-13 2023-02-17 株式会社Fts fuel tank
CN114450183A (en) * 2019-09-20 2022-05-06 考特克斯·特克斯罗恩有限公司及两合公司 Plastic container for motor vehicles with at least one reinforcing structure
CN114450183B (en) * 2019-09-20 2024-01-26 考特克斯·特克斯罗恩有限公司及两合公司 Plastic container for motor vehicles with at least one reinforcement structure

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