WO2023199674A1 - Connection structure for aluminum shaped sections - Google Patents

Connection structure for aluminum shaped sections Download PDF

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Publication number
WO2023199674A1
WO2023199674A1 PCT/JP2023/009605 JP2023009605W WO2023199674A1 WO 2023199674 A1 WO2023199674 A1 WO 2023199674A1 JP 2023009605 W JP2023009605 W JP 2023009605W WO 2023199674 A1 WO2023199674 A1 WO 2023199674A1
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WIPO (PCT)
Prior art keywords
aluminum
fiber reinforced
carbon fiber
reinforced resin
sleeve
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PCT/JP2023/009605
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French (fr)
Japanese (ja)
Inventor
貴弘 山口
真一 寺田
太河 佐藤
慎也 宮▲崎▼
晃久 中澤
航輔 柴田
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株式会社Lixil
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Publication of WO2023199674A1 publication Critical patent/WO2023199674A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B15/00—Layered products comprising a layer of metal
    • B32B15/01—Layered products comprising a layer of metal all layers being exclusively metallic
    • C—CHEMISTRY; METALLURGY
    • C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C26/00—Coating not provided for in groups C23C2/00 - C23C24/00
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B7/00—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections
    • F16B7/20—Connections of rods or tubes, e.g. of non-circular section, mutually, including resilient connections using bayonet connections

Definitions

  • the present disclosure relates to a connection structure for aluminum shapes.
  • metal parts such as aluminum and carbon fiber reinforced resin (CFRP). Since the carbon contained in the carbon fiber reinforced resin is conductive, glass fiber reinforcement is placed between the aluminum member and the carbon fiber reinforced resin to prevent corrosion of the aluminum parts that come into contact with the carbon fiber reinforced resin. It has been proposed to arrange a non-conductive sheet such as resin.
  • CFRP carbon fiber reinforced resin
  • the present disclosure provides a pair of aluminum profiles having a hollow part and connected to each other, a sleeve provided at the connection part of the pair of aluminum profiles and inserted into the hollow part, and a sleeve disposed on the surface of the sleeve. and a carbon fiber reinforced resin member, wherein an alumite film or a boehmite film is provided on the inner circumferential surface of the pair of aluminum shapes in the connecting portion.
  • FIG. 2 is a cross-sectional view taken along line AA in FIG. 1.
  • the arch 10 of this embodiment is a frame of an aluminum decorative member used for decorating a space.
  • the arch 10 includes a connecting structure 1 of aluminum shapes formed by connecting a pair of aluminum shapes against each other, and also includes struts 2, girders 3, and sleeves 4.
  • the struts 2 are arranged to face one and the other of the left and right sides of the arch 10 when viewed from the front.
  • the support column 2 is installed so as to extend in the vertical direction from an installation surface such as the ground.
  • the support column 2 is a long aluminum member that is hollow inside and has a hollow structure with a substantially rectangular cross section. Although the height dimension of the support column 2 is not limited, it has a length of about 2.5 m, for example.
  • the girder 3 connects the upper ends of the pillars 2 and is arranged to extend in the left-right direction when the arch 10 is viewed from the front. Although the length of the girder 3 is not limited, it has a length of about 10 m, for example.
  • the spar 3 is constructed by connecting a pair of spar bodies 31 as aluminum profiles, and includes the spar bodies 31, a connecting portion 32, and a sleeve 4.
  • the girder main body 31 is an elongated aluminum member that is hollow inside and has a hollow structure with a substantially square cross section.
  • the spar bodies 31 are members that form one spar 3 by connecting two spar bodies 31, and each spar body 31 has the same cross-sectional shape.
  • the lengths of the girder bodies 31 to be connected may be different, and may be, for example, 4 m and 6 m, although not limited thereto.
  • the girder main body 31 has a hollow portion 30, a girder upper surface portion 311, a girder lower surface portion 312, and a pair of girder side portions 313.
  • the hollow portion 30 is a space inside the spar body 31 and extends from one end of the spar body 31 in the longitudinal direction to the other end.
  • the girder upper surface portion 311 is a flat surface that is approximately rectangular in plan view. The width of the girder upper surface portion 311 in the transverse direction is, for example, about 15 cm.
  • the girder lower surface portion 312 is a flat surface that is substantially rectangular in plan view, and is disposed below the girder upper surface portion 311 . The width of the girder lower surface portion 312 in the transverse direction is, for example, about 15 cm.
  • the girder side surface portion 313 is a flat surface that connects the girder upper surface portion 311 and the girder lower surface portion 312. As shown in FIG.
  • the girder side surface portion 313 extends downward from the end of the girder upper surface portion 311 beyond the end of the girder lower surface portion 312, and is disposed so as to protrude downward from the lower end of the girder lower surface portion 312 in cross-sectional view. has been done.
  • the width of the girder side portion 313 in the transverse direction is, for example, about 15 cm.
  • An alumite film 33 or a boehmite film 34 formed by electrode treatment or hydrothermal treatment is provided on the inner circumferential surfaces 311a, 312a of the girder upper surface portion 311 and the girder lower surface portion 312, that is, the surfaces facing the hollow portion 30 side. .
  • the alumite film 33 is a film that is produced on the surface of aluminum by immersing the aluminum profile forming the girder body 31 in an electrolytic solution and passing an electric current through the electrolytic solution.
  • the boehmite film 34 is a film that is generated on the surface of aluminum by immersing the aluminum profile forming the girder body 31 in hot water of 75 degrees or higher.
  • the alumite coating 33 or the boehmite coating 34 may be formed on the entire inner circumferential surface of the hollow portion 30, but the alumite coating 33 or the boehmite coating 34 may be formed on the inner circumferential surface of a portion where at least a pair of girder bodies 31 are butted and connected, that is, as described below. It is sufficient that it is formed on the inner circumferential surface of the girder body 31 in the connecting portion 32.
  • the connecting portion 32 is a portion where the ends of one spar main body 31a and the other spar main body 31b are connected.
  • the connecting portion 32 refers to an area where the ends of adjacent girder bodies 31a, 31b are butted together, and a sleeve 4, which will be described below, is inserted into a hollow portion 30 inside the girder bodies 31a, 31b.
  • the sleeve 4 is provided at the connecting portion 32 and inserted through the hollow portions 30 of the two girder bodies 31a and 31b.
  • the sleeve 4 is arranged to increase the strength of the portion where the girder bodies 31 are connected.
  • the sleeve 4 is an elongated aluminum member that is hollow inside and has a hollow structure with a substantially rectangular cross section.
  • the length of the sleeve 4 is shorter than the length of the spar body 31, and may be, for example, 2 m, although not limited thereto.
  • the sleeve 4 is arranged such that its longitudinal center portion is located at adjacent ends of the two spar bodies 31a, 31b, and is fixed to the spar bodies 31a, 31b with screws. As shown in FIG.
  • the sleeve 4 has an upper surface portion 41, a lower surface portion 42, a pair of side surfaces 43, a sleeve hollow portion 40, and a carbon fiber reinforced resin member 5.
  • the sleeve hollow portion 40 is a space inside the sleeve 4 and extends from one end to the other end in the longitudinal direction.
  • the upper surface portion 41 is a flat surface that extends to the upper surface of the aluminum profile when installed within the girder body 31.
  • the upper surface portion 41 has a recess plane 41a and an end plane 41b.
  • the end planes 41b are planes that are arranged at both ends in the width direction of the sleeve 4 in a cross-sectional view and extend from the ends in the width direction toward the center.
  • the recessed portion flat surface 41a is recessed compared to the end portion flat surface 41b so as to be located slightly closer to the sleeve hollow portion 40 than the end portion flat surface 41b.
  • the height of the concave plane 41a is about 2 to 3 mm.
  • the lower surface portion 42 has a shape symmetrical to the upper surface portion 41, and includes a recessed flat surface 42a and an end flat surface 42b.
  • the end planes 42b are planes that are arranged at both ends in the width direction of the sleeve 4 in a cross-sectional view and extend from the ends in the width direction toward the center.
  • the recess plane 42a is recessed compared to the end plane 42b so that it is located slightly closer to the sleeve hollow part 40 than the end plane 42b.
  • the height of the concave plane 42a is about 2 to 3 mm.
  • the pair of side surfaces 43 connects the boundary between the end plane 41b and the recess plane 41a in the upper surface 41 and the boundary between the end plane 42b and the recess plane 42a in the lower surface 42. It is a flat surface that extends in the vertical direction when placed within 31.
  • the carbon fiber reinforced resin member 5 is a sheet-shaped member made of carbon fiber reinforced plastics, which is a resin material mixed with carbon fibers.
  • the carbon fiber-reinforced resin member 5 is bonded to the concave plane 41a of the upper surface portion 41 and the concave plane 42a of the lower surface portion 42 using an adhesive 51.
  • the surface of the carbon fiber reinforced resin member 5 is located at approximately the same height as the end planes 41b, 42b of the sleeve 4.
  • the dimensions of the carbon fiber reinforced resin member 5 are smaller than the upper surface portion 41 or the lower surface portion 42 of the sleeve 4.
  • the sleeve 4 described above is placed inside the hollow part 30 of the spar main body 31. At that time, a gap G of 2.0 mm or less is formed between the surface of the carbon fiber reinforced resin member 5 and the inner peripheral surfaces 311a and 312a of the spar upper surface 311 and spar lower surface 312 in the spar main body 31. There is.
  • Table 1 shows the test results that verified the presence or absence of electrolytic corrosion when an alumite film and a boehmite film were formed on the inner peripheral surface of an aluminum plate and when they were not formed.
  • extruded molded materials of 6063 aluminum alloy were used as test products.
  • the dimensions of the test article are 100 mm in the longitudinal direction, 30 mm in the transverse direction, and 2 mm in thickness.
  • the dimensions of the carbon fiber reinforced resin plate are 100 mm in the longitudinal direction, 30 mm in the transverse direction, and 2 mm in thickness.
  • boehmite films were formed on test products.
  • an aluminum plate was immersed in hot water at 80 degrees.
  • Example 1 was immersed for 5 minutes, and Example 2 was immersed for 10 minutes.
  • Example 3 an alumite film was formed on a test product.
  • the test article was etched for 5 minutes in a 50 degree sodium hydroxide aqueous solution to remove the natural oxide film formed on the surface of the test article. Thereafter, the test piece was immersed in a 15% sulfuric acid aqueous solution and anodized at a current density of 100 A/m 2 for 5 minutes.
  • Comparative Example 1 before conducting the test, the test article was etched for 5 minutes in a 5% aqueous sodium hydroxide solution at 50 degrees Celsius to remove the natural oxide film that had formed on the surface of the test article.
  • Example 1 to Comparative Example 2 A single test product in which the test products treated in each of Examples 1 to Comparative Example 2 were placed alone without being adjacent to a carbon fiber reinforced resin plate, and a test product treated in Examples 1 to Comparative Example 2 and After salt water spraying, the appearance of the test piece, which was made by integrating carbon fiber reinforced resin plates with a clearance of 2.0 mm, was compared and visually evaluated.
  • Examples 1 to Comparative Examples 2 when the corrosion state was the same as that of the test sample alone, it was marked as ⁇ . A mark of " ⁇ " was given when corrosion was accelerated compared to a single test specimen placed not adjacent to the carbon fiber reinforced resin plate.
  • Example 2 the corrosion current density of the aluminum plate having the boehmite film was kept low.
  • the appearance of Examples 1 and 2 after being sprayed with salt water was in a state of corrosion comparable to that of the single test product placed not adjacent to the carbon fiber reinforced resin plate.
  • the boehmite film was thicker in Example 2, which had a longer immersion time in hot water, and the corrosion current density was lower in Example 2, which had a thicker film.
  • Example 3 the aluminum plate with the alumite film had a lower corrosion current density than Examples 1 and 2.
  • the appearance of Example 3 after being sprayed with salt water was in a state of corrosion comparable to that of the single test sample placed not adjacent to the carbon fiber reinforced resin plate.
  • the resulting film was thinner than Examples 1 and 2.
  • Comparative Examples 1 and 2 the corrosion current density was high and the current flowed easily. As for the appearance after salt water spraying, corrosion was accelerated in Comparative Examples 1 and 2 compared to the test products placed not adjacent to the carbon fiber reinforced resin plate.
  • a connecting structure 1 of aluminum shapes is provided in the girder bodies 31, which are a pair of aluminum shapes having a hollow part 30 and are butt-connected to each other, and the connecting part 32 of the pair of girder bodies 31, and inserted into the hollow part 30.
  • the carbon fiber reinforced resin member 5 is arranged on the surface of the sleeve 4.
  • An alumite film 33 or a boehmite film 34 was provided on the inner peripheral surfaces of the pair of girder bodies 31 in the connecting portion 32.
  • a gap of 2.0 mm or less is formed between the carbon fiber reinforced resin member 5 and the inner peripheral surfaces 311a and 312a. Even if a gap G of 2.0 mm or less is formed between the carbon fiber reinforced resin member 5 and the inner peripheral surfaces 311a, 312a, the alumite film 33 or boehmite film is provided on the inner peripheral surfaces 311a, 312a. , electrolytic corrosion of the girder body 31 is prevented.

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  • Chemical & Material Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
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Abstract

The present invention addresses the problem of providing a connection structure for aluminum shaped sections that can prevent corrosion of the aluminum shaped sections arranged in the vicinity of carbon fiber reinforced resin. A connection structure 1 for aluminum shaped sections comprises a pair of aluminum shaped sections 31 that have a hollow portion 30 and are butt-connected to each other, a sleeve 4 that is provided at a connection portion 32 of the pair of aluminum shaped sections 31 and inserted into the hollow portion 30, and a carbon fiber reinforced resin member 5 arranged on the surface of the sleeve 4, wherein an alumite film 33 or a boehmite film 34 is provided on inner peripheral surfaces 311a and 312a of the pair of aluminum shaped sections 31 in the connection portion 32.

Description

アルミ型材の連結構造Connection structure of aluminum shapes
　本開示は、アルミ型材の連結構造に関する。 The present disclosure relates to a connection structure for aluminum shapes.
　従来、様々な構造体や部材等において、アルミニウム等の金属の部品と、炭素繊維強化樹脂（ＣＦＲＰ）とを重ねて配置することが知られている。炭素繊維強化樹脂中に含まれる炭素が導電性であることから、炭素繊維強化樹脂に接触するアルミニウム製の部材の腐食を防ぐため、アルミニウム製の部材と炭素繊維強化樹脂との間にガラス繊維強化樹脂等の非導電性シートを配置することが提案されている。 Conventionally, in various structures, members, etc., it has been known to overlap metal parts such as aluminum and carbon fiber reinforced resin (CFRP). Since the carbon contained in the carbon fiber reinforced resin is conductive, glass fiber reinforcement is placed between the aluminum member and the carbon fiber reinforced resin to prevent corrosion of the aluminum parts that come into contact with the carbon fiber reinforced resin. It has been proposed to arrange a non-conductive sheet such as resin.
国際公開第２０１６／０２１２５９号International Publication No. 2016/021259
　ガラス繊維強化樹脂等の他の部材を設けることで、製造コストが上昇したり、他の部材のためのスペースを配置する必要が生じる。アルミ型材を連結する場合、他の部材を設けずに、炭素繊維強化樹脂に近接して配置されるアルミ型材の腐食を防ぐことが望ましい。 By providing other members such as glass fiber reinforced resin, manufacturing costs increase and it becomes necessary to provide space for the other members. When connecting aluminum shapes, it is desirable to prevent corrosion of the aluminum shapes placed close to the carbon fiber reinforced resin without providing any other members.
　本開示は、中空部を有し、互いに突き合わせ連結される一対のアルミ型材と、前記一対のアルミ型材の連結部に設けられ、前記中空部内に挿入されるスリーブと、前記スリーブの表面に配置される炭素繊維強化樹脂部材と、を備え、前記連結部における前記一対のアルミ型材の内周面には、アルマイト皮膜又はベーマイト皮膜が設けられている、アルミ型材の連結構造に関する。 The present disclosure provides a pair of aluminum profiles having a hollow part and connected to each other, a sleeve provided at the connection part of the pair of aluminum profiles and inserted into the hollow part, and a sleeve disposed on the surface of the sleeve. and a carbon fiber reinforced resin member, wherein an alumite film or a boehmite film is provided on the inner circumferential surface of the pair of aluminum shapes in the connecting portion.
本実施形態のアーチを示す図である。It is a figure showing an arch of this embodiment. 図１のＡ－Ａ線断面図である。FIG. 2 is a cross-sectional view taken along line AA in FIG. 1.
　以下、本開示の実施形態について、図面を参照しながら詳細に説明する。図１に示すように、本実施形態のアーチ１０は、空間の装飾に用いられるアルミニウム製の装飾部材の骨組みである。アーチ１０は、一対のアルミ型材を互いに突き合せて連結して構成されるアルミ型材の連結構造１を備えるとともに、支柱２と、桁３と、スリーブ４と、を有する。 Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. As shown in FIG. 1, the arch 10 of this embodiment is a frame of an aluminum decorative member used for decorating a space. The arch 10 includes a connecting structure 1 of aluminum shapes formed by connecting a pair of aluminum shapes against each other, and also includes struts 2, girders 3, and sleeves 4.
　支柱２は、アーチ１０の正面視における左右方向の一方及び他方に対向して配置される。支柱２は、地面等の設置面から上下方向に延びるように設置される。支柱２は内部が中空で、断面視略四角形のホロー構造を有する長尺のアルミ型材である。支柱２の高さ寸法は限定されないが、例えば２．５ｍ程度の長さを有する。 The struts 2 are arranged to face one and the other of the left and right sides of the arch 10 when viewed from the front. The support column 2 is installed so as to extend in the vertical direction from an installation surface such as the ground. The support column 2 is a long aluminum member that is hollow inside and has a hollow structure with a substantially rectangular cross section. Although the height dimension of the support column 2 is not limited, it has a length of about 2.5 m, for example.
　桁３は、支柱２の上端を接続し、アーチ１０の正面視における左右方向に延びるように配置される。桁３の長さは限定されないが、例えば１０ｍ程度の長さを有する。桁３は、一対のアルミ型材としての桁本体３１が連結されることで構成され、桁本体３１と、連結部３２と、スリーブ４と、を有する。 The girder 3 connects the upper ends of the pillars 2 and is arranged to extend in the left-right direction when the arch 10 is viewed from the front. Although the length of the girder 3 is not limited, it has a length of about 10 m, for example. The spar 3 is constructed by connecting a pair of spar bodies 31 as aluminum profiles, and includes the spar bodies 31, a connecting portion 32, and a sleeve 4.
　桁本体３１は、内部が中空で、断面視略四角形のホロー構造を有する長尺のアルミ型材である。図１に示すように、桁本体３１は、２本の桁本体３１を連結することで１本の桁３を形成する部材であり、それぞれの桁本体３１の断面形状は同一である。連結される桁本体３１の長さは異なっていてよく、限定されないが、例えば４ｍと６ｍであってよい。図２に示すように、桁本体３１は、中空部３０と、桁上面部３１１と、桁下面部３１２と、一対の桁側面部３１３と、を有する。 The girder main body 31 is an elongated aluminum member that is hollow inside and has a hollow structure with a substantially square cross section. As shown in FIG. 1, the spar bodies 31 are members that form one spar 3 by connecting two spar bodies 31, and each spar body 31 has the same cross-sectional shape. The lengths of the girder bodies 31 to be connected may be different, and may be, for example, 4 m and 6 m, although not limited thereto. As shown in FIG. 2, the girder main body 31 has a hollow portion 30, a girder upper surface portion 311, a girder lower surface portion 312, and a pair of girder side portions 313.
　中空部３０は、桁本体３１の内部の空間であり、桁本体３１の長手方向の一端から他端まで延びる。桁上面部３１１は、平面視略長方形の平坦な面である。桁上面部３１１の短手方向の幅は、例えば１５ｃｍ程度である。桁下面部３１２は、平面視略長方形の平坦な面であり、桁上面部３１１の下方に配置される。桁下面部３１２の短手方向の幅は、例えば１５ｃｍ程度である。桁側面部３１３は、桁上面部３１１及び桁下面部３１２を接続する平坦な面である。図２に示すように、桁側面部３１３は、桁上面部３１１の端部から桁下面部３１２の端部を越えて下方へ延び、断面視で桁下面部３１２の下端から下方に突出して配置されている。桁側面部３１３の短手方向の幅は、例えば１５ｃｍ程度である。桁上面部３１１及び桁下面部３１２の内周面３１１ａ、３１２ａ、すなわち中空部３０側に面する面には、電極処理又は水熱処理によって形成されたアルマイト皮膜３３又はベーマイト皮膜３４が設けられている。 The hollow portion 30 is a space inside the spar body 31 and extends from one end of the spar body 31 in the longitudinal direction to the other end. The girder upper surface portion 311 is a flat surface that is approximately rectangular in plan view. The width of the girder upper surface portion 311 in the transverse direction is, for example, about 15 cm. The girder lower surface portion 312 is a flat surface that is substantially rectangular in plan view, and is disposed below the girder upper surface portion 311 . The width of the girder lower surface portion 312 in the transverse direction is, for example, about 15 cm. The girder side surface portion 313 is a flat surface that connects the girder upper surface portion 311 and the girder lower surface portion 312. As shown in FIG. 2, the girder side surface portion 313 extends downward from the end of the girder upper surface portion 311 beyond the end of the girder lower surface portion 312, and is disposed so as to protrude downward from the lower end of the girder lower surface portion 312 in cross-sectional view. has been done. The width of the girder side portion 313 in the transverse direction is, for example, about 15 cm. An alumite film 33 or a boehmite film 34 formed by electrode treatment or hydrothermal treatment is provided on the inner circumferential surfaces 311a, 312a of the girder upper surface portion 311 and the girder lower surface portion 312, that is, the surfaces facing the hollow portion 30 side. .
　アルマイト皮膜３３は、桁本体３１を構成するアルミ型材を、電解液中に浸漬し、電解溶液中に電流を流すことでアルミニウムの表面に生成される皮膜である。ベーマイト皮膜３４は、桁本体３１を構成するアルミ型材を、７５度以上の温水に浸漬することでアルミニウムの表面に生成される皮膜である。アルマイト皮膜３３又はベーマイト皮膜３４は、中空部３０の内周面の全体に形成されていてもよいが、少なくとも一対の桁本体３１同士を突き合せ連結する部分の内周面、すなわち以下に説明する連結部３２における桁本体３１の内周面に形成されていればよい。 The alumite film 33 is a film that is produced on the surface of aluminum by immersing the aluminum profile forming the girder body 31 in an electrolytic solution and passing an electric current through the electrolytic solution. The boehmite film 34 is a film that is generated on the surface of aluminum by immersing the aluminum profile forming the girder body 31 in hot water of 75 degrees or higher. The alumite coating 33 or the boehmite coating 34 may be formed on the entire inner circumferential surface of the hollow portion 30, but the alumite coating 33 or the boehmite coating 34 may be formed on the inner circumferential surface of a portion where at least a pair of girder bodies 31 are butted and connected, that is, as described below. It is sufficient that it is formed on the inner circumferential surface of the girder body 31 in the connecting portion 32.
　連結部３２は、一方の桁本体３１ａと他方の桁本体３１ｂの端部が連結される部分である。連結部３２は、隣接する桁本体３１ａ、３１ｂの端部を突き合せ、桁本体３１ａ、３１ｂの内部の中空部３０に、以下に説明するスリーブ４を挿通させた範囲を指す。 The connecting portion 32 is a portion where the ends of one spar main body 31a and the other spar main body 31b are connected. The connecting portion 32 refers to an area where the ends of adjacent girder bodies 31a, 31b are butted together, and a sleeve 4, which will be described below, is inserted into a hollow portion 30 inside the girder bodies 31a, 31b.
　スリーブ４は、連結部３２に設けられ、２本の桁本体３１ａ、３１ｂの中空部３０内を挿通して配置される。スリーブ４は、桁本体３１同士が連結される部分の強度を高めるために配置される。スリーブ４は、内部が中空で、断面視略四角形のホロー構造を有する長尺のアルミ型材である。スリーブ４の長さは、桁本体３１の長さより短く、限定されないが、例えば２ｍであってよい。スリーブ４は、長手方向の中央部が、２本の桁本体３１ａ、３１ｂの隣接する端部に位置するように配置され、ビスにより桁本体３１ａ、３１ｂに固定される。図２に示すように、スリーブ４は、上面部４１と、下面部４２と、一対の側面部４３と、スリーブ中空部４０と、炭素繊維強化樹脂部材５とを有する。スリーブ中空部４０は、スリーブ４の内部の空間であり、長手方向の一端から他端まで延びる。 The sleeve 4 is provided at the connecting portion 32 and inserted through the hollow portions 30 of the two girder bodies 31a and 31b. The sleeve 4 is arranged to increase the strength of the portion where the girder bodies 31 are connected. The sleeve 4 is an elongated aluminum member that is hollow inside and has a hollow structure with a substantially rectangular cross section. The length of the sleeve 4 is shorter than the length of the spar body 31, and may be, for example, 2 m, although not limited thereto. The sleeve 4 is arranged such that its longitudinal center portion is located at adjacent ends of the two spar bodies 31a, 31b, and is fixed to the spar bodies 31a, 31b with screws. As shown in FIG. 2, the sleeve 4 has an upper surface portion 41, a lower surface portion 42, a pair of side surfaces 43, a sleeve hollow portion 40, and a carbon fiber reinforced resin member 5. The sleeve hollow portion 40 is a space inside the sleeve 4 and extends from one end to the other end in the longitudinal direction.
　上面部４１は図２に示すように、桁本体３１内に設置された状態でアルミ型材の上面に延びる平坦な面である。上面部４１は、凹部平面４１ａと、端部平面４１ｂと、を有する。端部平面４１ｂは、スリーブ４の断面視における幅方向の両端側に配置され、幅方向の端部から中央側に向かって延びる平面である。凹部平面４１ａは、端部平面４１ｂよりもわずかにスリーブ中空部４０側に位置するように、端部平面４１ｂと比べて窪んでいる。凹部平面４１ａの窪む高さは、２～３ｍｍ程度である。 As shown in FIG. 2, the upper surface portion 41 is a flat surface that extends to the upper surface of the aluminum profile when installed within the girder body 31. The upper surface portion 41 has a recess plane 41a and an end plane 41b. The end planes 41b are planes that are arranged at both ends in the width direction of the sleeve 4 in a cross-sectional view and extend from the ends in the width direction toward the center. The recessed portion flat surface 41a is recessed compared to the end portion flat surface 41b so as to be located slightly closer to the sleeve hollow portion 40 than the end portion flat surface 41b. The height of the concave plane 41a is about 2 to 3 mm.
　下面部４２は、図２に示すように、上面部４１と対称な形状を有し、凹部平面４２ａと、端部平面４２ｂと、を有する。端部平面４２ｂは、スリーブ４の断面視における幅方向の両端側に配置され、幅方向の端部から中央側に向かって延びる平面である。凹部平面４２ａは、端部平面４２ｂよりもわずかにスリーブ中空部４０側に位置するように、端部平面４２ｂと比べて窪んでいる。凹部平面４２ａの窪む高さは、２～３ｍｍ程度である。 As shown in FIG. 2, the lower surface portion 42 has a shape symmetrical to the upper surface portion 41, and includes a recessed flat surface 42a and an end flat surface 42b. The end planes 42b are planes that are arranged at both ends in the width direction of the sleeve 4 in a cross-sectional view and extend from the ends in the width direction toward the center. The recess plane 42a is recessed compared to the end plane 42b so that it is located slightly closer to the sleeve hollow part 40 than the end plane 42b. The height of the concave plane 42a is about 2 to 3 mm.
　一対の側面部４３は、上面部４１における端部平面４１ｂと凹部平面４１ａとの境界部と、下面部４２における端部平面４２ｂと凹部平面４２ａとの境界部とを接続するように、桁本体３１内に配置された状態で上下方向に延びる平坦な面である。 The pair of side surfaces 43 connects the boundary between the end plane 41b and the recess plane 41a in the upper surface 41 and the boundary between the end plane 42b and the recess plane 42a in the lower surface 42. It is a flat surface that extends in the vertical direction when placed within 31.
　炭素繊維強化樹脂部材５は、樹脂材に炭素繊維を混合させた炭素繊維強化樹脂（Carbon Fiber Reinforced Plastics）をシート状にした部材である。炭素繊維強化樹脂部材５は、上面部４１の凹部平面４１ａと、下面部４２の凹部平面４２ａに接着剤５１により接着して配置される。炭素繊維強化樹脂部材５がスリーブ４に接着されることで、スリーブ４の剛性が向上する。炭素繊維強化樹脂部材５の表面は、スリーブ４の端部平面４１ｂ、４２ｂと概ね同じ高さに位置する。炭素繊維強化樹脂部材５の寸法は、スリーブ４の上面部４１又は下面部４２よりも小さい。 The carbon fiber reinforced resin member 5 is a sheet-shaped member made of carbon fiber reinforced plastics, which is a resin material mixed with carbon fibers. The carbon fiber-reinforced resin member 5 is bonded to the concave plane 41a of the upper surface portion 41 and the concave plane 42a of the lower surface portion 42 using an adhesive 51. By bonding the carbon fiber reinforced resin member 5 to the sleeve 4, the rigidity of the sleeve 4 is improved. The surface of the carbon fiber reinforced resin member 5 is located at approximately the same height as the end planes 41b, 42b of the sleeve 4. The dimensions of the carbon fiber reinforced resin member 5 are smaller than the upper surface portion 41 or the lower surface portion 42 of the sleeve 4.
　以上のスリーブ４は、桁本体３１の中空部３０内に配置される。その際、炭素繊維強化樹脂部材５の表面と、桁本体３１における桁上面部３１１及び桁下面部３１２の内周面３１１ａ、３１２ａとの間には、２．０ｍｍ以下の隙間Ｇが形成されている。 The sleeve 4 described above is placed inside the hollow part 30 of the spar main body 31. At that time, a gap G of 2.0 mm or less is formed between the surface of the carbon fiber reinforced resin member 5 and the inner peripheral surfaces 311a and 312a of the spar upper surface 311 and spar lower surface 312 in the spar main body 31. There is.
　表１に、アルミニウム製の板の内周面に、アルマイト皮膜及びベーマイト皮膜を形成した場合と、形成しなかった場合の電食の生成の有無を検証した試験結果を示す。 Table 1 shows the test results that verified the presence or absence of electrolytic corrosion when an alumite film and a boehmite film were formed on the inner peripheral surface of an aluminum plate and when they were not formed.
Figure JPOXMLDOC01-appb-T000001
Figure JPOXMLDOC01-appb-T000001
　実施例１～３及び比較例１及び２として、６０６３アルミニウム合金の押出型材を試験品とした。試験品の寸法は、長手方向１００ｍｍ、短手方向３０ｍｍ、厚さ２ｍｍである。また、三菱ケミカル社製のＴＲＷ４０－５０Ｌ、エポキシ樹脂の引抜成型品である炭素繊維強化樹脂の板を、試験品と２．０ｍｍのクリアランスを設けた状態で固定した。炭素繊維強化樹脂板の寸法は、長手方向１００ｍｍ、短手方向３０ｍｍ、厚さ２ｍｍである。 As Examples 1 to 3 and Comparative Examples 1 and 2, extruded molded materials of 6063 aluminum alloy were used as test products. The dimensions of the test article are 100 mm in the longitudinal direction, 30 mm in the transverse direction, and 2 mm in thickness. Further, a plate of carbon fiber reinforced resin, TRW40-50L manufactured by Mitsubishi Chemical Corporation, which is a pultrusion molded product of epoxy resin, was fixed to the test specimen with a clearance of 2.0 mm. The dimensions of the carbon fiber reinforced resin plate are 100 mm in the longitudinal direction, 30 mm in the transverse direction, and 2 mm in thickness.
　実施例１及び２として、試験品にベーマイト皮膜を形成した。試験品を、８０度の温水中にアルミニウム板を浸漬させた。実施例１は、５分間浸漬し、実施例２は、１０分間浸漬処理を行った。 As Examples 1 and 2, boehmite films were formed on test products. For the test product, an aluminum plate was immersed in hot water at 80 degrees. Example 1 was immersed for 5 minutes, and Example 2 was immersed for 10 minutes.
　実施例３として、試験品にアルマイト皮膜を形成した。試験品を、５０度の水酸化ナトリウム水溶液にて５分間エッチング処理を行い、試験品の表面に生成している自然酸化被膜を除去した。その後、試験品を１５％の硫酸水溶液中に浸漬し、１００Ａ／ｍ２の電流密度にて５分間陽極酸化処理を行った。 As Example 3, an alumite film was formed on a test product. The test article was etched for 5 minutes in a 50 degree sodium hydroxide aqueous solution to remove the natural oxide film formed on the surface of the test article. Thereafter, the test piece was immersed in a 15% sulfuric acid aqueous solution and anodized at a current density of 100 A/m 2 for 5 minutes.
　比較例１は、試験実施前に、試験品を５０度の５％水酸化ナトリウム水溶液にて５分間エッチング処理を行い、試験品の表面に生成している自然酸化被膜を除去した。 In Comparative Example 1, before conducting the test, the test article was etched for 5 minutes in a 5% aqueous sodium hydroxide solution at 50 degrees Celsius to remove the natural oxide film that had formed on the surface of the test article.
　比較例２は、試験品のアルミニウム板を押し出し成形した後、成形された試験品に生成した自然酸化被膜をそのまま放置した。 In Comparative Example 2, after the aluminum plate of the test product was extruded and molded, the natural oxide film formed on the molded test product was left as it was.
　＜腐食電流測定＞
以上の通り得た実施例１～３及び比較例１、２に電流を流して腐食電流を測定した。試験品を、直径１９ｍｍの孔を開けたビニルテープで被覆し、ビニルテープの孔を炭素繊維強化樹脂側に面する内周面側に配置させて試験面積を設定した。測定は、２．５％のＮａＣｌ水溶液を２５度で、スターラーにて２５０ｒｐｍで攪拌して温度を均一化して行った。試験品と炭素繊維強化樹脂板を、北斗電工株式会社製ＨＭ－１０３Ａの無抵抗電流計を介して短絡させ、測定を実施した。得られた電流密度を表１に示す。 <Corrosion current measurement>
A current was applied to Examples 1 to 3 and Comparative Examples 1 and 2 obtained as described above, and the corrosion current was measured. The test product was covered with a vinyl tape having holes of 19 mm in diameter, and the test area was set by arranging the holes of the vinyl tape on the inner peripheral surface facing the carbon fiber reinforced resin side. The measurement was carried out by stirring a 2.5% NaCl aqueous solution at 25 degrees Celsius with a stirrer at 250 rpm to equalize the temperature. Measurements were performed by short-circuiting the test product and the carbon fiber reinforced resin plate via a non-resistance ammeter HM-103A manufactured by Hokuto Denko Co., Ltd. The obtained current densities are shown in Table 1.
　＜塩水噴霧試験＞
　試験品と炭素繊維強化樹脂板を、ＪＩＳ　Ｚ２３７１にて規定される中性塩水噴霧試験４８００時間にて試験を実施した。これにより、試験品と炭素繊維強化樹脂板との間に試験液が入り、試験品と炭素繊維強化樹脂板とが試験液を通じて電気的に接触する。実施例１～比較例２それぞれの処理をした試験品を、炭素繊維強化樹脂板に隣接させないで単体で配置した試験品単体と、実施例１～比較例２に係る処理を行った試験品及び炭素繊維強化樹脂板を２．０ｍｍのクリアランスを設けて一体化させた試験体とを、塩水噴霧後、外観を比較して目視にて評価を行った。実施例１～比較例２において、試験品単体と同程度の腐食状態である場合、〇と記載した。炭素繊維強化樹脂板に隣接させないで配置した試験品単体と比較し、腐食が促進された状態である場合、×と記載した。 <Salt spray test>
The test product and the carbon fiber reinforced resin plate were subjected to a 4800 hour neutral salt spray test specified in JIS Z2371. As a result, the test liquid enters between the test article and the carbon fiber reinforced resin plate, and the test article and the carbon fiber reinforced resin plate are brought into electrical contact through the test liquid. Example 1 to Comparative Example 2 A single test product in which the test products treated in each of Examples 1 to Comparative Example 2 were placed alone without being adjacent to a carbon fiber reinforced resin plate, and a test product treated in Examples 1 to Comparative Example 2 and After salt water spraying, the appearance of the test piece, which was made by integrating carbon fiber reinforced resin plates with a clearance of 2.0 mm, was compared and visually evaluated. In Examples 1 to Comparative Examples 2, when the corrosion state was the same as that of the test sample alone, it was marked as ○. A mark of "×" was given when corrosion was accelerated compared to a single test specimen placed not adjacent to the carbon fiber reinforced resin plate.
　＜評価＞
　実施例１及び２について、ベーマイト皮膜を有するアルミニウム板は、腐食電流密度が低く抑えられた。塩水噴霧後の実施例１及び２の外観は、炭素繊維強化樹脂板に隣接させないで配置させた試験品単体と同程度の腐食状態だった。また、実施例１と２とでは、温水に浸漬する時間が長い実施例２の方で、ベーマイト皮膜が厚く得られ、皮膜が厚い方実施例２の方が、腐食電流密度が低かった。 <Evaluation>
Regarding Examples 1 and 2, the corrosion current density of the aluminum plate having the boehmite film was kept low. The appearance of Examples 1 and 2 after being sprayed with salt water was in a state of corrosion comparable to that of the single test product placed not adjacent to the carbon fiber reinforced resin plate. Furthermore, between Examples 1 and 2, the boehmite film was thicker in Example 2, which had a longer immersion time in hot water, and the corrosion current density was lower in Example 2, which had a thicker film.
　実施例３について、アルマイト皮膜を有するアルミニウム板は、実施例１及び２よりも腐食電流密度が低かった。塩水噴霧後の実施例３の外観は、炭素繊維強化樹脂板に隣接させないで配置させた試験品単体と同程度の腐食状態だった。得られた皮膜は、実施例１及び２よりも薄かった。 Regarding Example 3, the aluminum plate with the alumite film had a lower corrosion current density than Examples 1 and 2. The appearance of Example 3 after being sprayed with salt water was in a state of corrosion comparable to that of the single test sample placed not adjacent to the carbon fiber reinforced resin plate. The resulting film was thinner than Examples 1 and 2.
　比較例１及び２では、腐食電流密度が高く、電流が流れやすいことがわかった。塩水噴霧後の外観は、炭素繊維強化樹脂板に隣接させないで配置させた試験品と比べて、比較例１及び２の方が、腐食が促進されていた。 It was found that in Comparative Examples 1 and 2, the corrosion current density was high and the current flowed easily. As for the appearance after salt water spraying, corrosion was accelerated in Comparative Examples 1 and 2 compared to the test products placed not adjacent to the carbon fiber reinforced resin plate.
　アルミニウム板の炭素繊維強化樹脂板に面する側の表面に、アルマイト皮膜又はベーマイト皮膜を形成することにより、アルミニウム板が炭素繊維強化樹脂板に隣接して配置されていても、アルミニウム板の腐食の抑制が図られることがわかった。 By forming an alumite film or a boehmite film on the surface of the aluminum plate facing the carbon fiber reinforced resin plate, corrosion of the aluminum plate can be prevented even if the aluminum plate is placed adjacent to the carbon fiber reinforced resin plate. It was found that efforts were being made to suppress this.
　本実施形態によれば、以下の効果が奏される。アルミ型材の連結構造１を、中空部３０を有し、互いに突き合わせ連結される一対のアルミ型材である桁本体３１と、一対の桁本体３１の連結部３２に設けられ、中空部３０内に挿入されるスリーブ４と、スリーブ４の表面に配置される炭素繊維強化樹脂部材５と、を含んで構成した。連結部３２における一対の桁本体３１の内周面に、アルマイト皮膜３３又はベーマイト皮膜３４を設けた。これにより、アルミニウム製のスリーブ４を炭素繊維強化樹脂部材５で補強する一方で、炭素繊維強化樹脂部材５に面する桁本体３１の中空部３０の内周面と、炭素繊維強化樹脂部材５との間に雨水等が接して電流が流れ、腐食することを防止することができる。よって、ガラス繊維強化樹脂等の他の部材を設けずに、容易に電食を防止することができる。 According to this embodiment, the following effects are achieved. A connecting structure 1 of aluminum shapes is provided in the girder bodies 31, which are a pair of aluminum shapes having a hollow part 30 and are butt-connected to each other, and the connecting part 32 of the pair of girder bodies 31, and inserted into the hollow part 30. The carbon fiber reinforced resin member 5 is arranged on the surface of the sleeve 4. An alumite film 33 or a boehmite film 34 was provided on the inner peripheral surfaces of the pair of girder bodies 31 in the connecting portion 32. As a result, while the aluminum sleeve 4 is reinforced with the carbon fiber reinforced resin member 5, the inner peripheral surface of the hollow part 30 of the spar main body 31 facing the carbon fiber reinforced resin member 5 and the carbon fiber reinforced resin member 5 are reinforced. It is possible to prevent rainwater etc. from coming into contact between the parts and causing current to flow and causing corrosion. Therefore, electrolytic corrosion can be easily prevented without providing other members such as glass fiber reinforced resin.
　本実施形態によれば、炭素繊維強化樹脂部材５と、内周面３１１ａ、３１２ａとの間に、２．０ｍｍ以下の隙間が形成されている。炭素繊維強化樹脂部材５と内周面３１１ａ、３１２ａとの間に２．０ｍｍ以下の隙間Ｇが形成されていても、内周面３１１ａ、３１２ａにアルマイト皮膜３３又はベーマイト皮膜が設けられているので、桁本体３１の電食が防止される。 According to this embodiment, a gap of 2.0 mm or less is formed between the carbon fiber reinforced resin member 5 and the inner peripheral surfaces 311a and 312a. Even if a gap G of 2.0 mm or less is formed between the carbon fiber reinforced resin member 5 and the inner peripheral surfaces 311a, 312a, the alumite film 33 or boehmite film is provided on the inner peripheral surfaces 311a, 312a. , electrolytic corrosion of the girder body 31 is prevented.
　本開示は上記実施形態に限定されるものではなく、本開示の目的を達成できる範囲での変形、改良等は本開示に含まれる。上記の説明で記載した寸法等は、例示に過ぎず、適宜変更が可能である。 The present disclosure is not limited to the above-described embodiments, and any modifications, improvements, etc. that can achieve the objectives of the present disclosure are included in the present disclosure. The dimensions and the like described in the above description are merely examples and can be changed as appropriate.
　１　アルミ型材の連結構造、　４　スリーブ、　５　炭素繊維強化樹脂部材、　３０　中空部、　３１　桁本体（アルミ型材）、　３２　連結部、　３３　アルマイト皮膜、　３４　ベーマイト皮膜、　３１１ａ、３１２ａ　内周面 1 Aluminum type consolidated structure, 4 sleeve, 5 carbon fiber reinforced resin members, 30 hollow parts, 31 -digit body (aluminum type material), 32 connected portion, 33 aluminum film, 34 bowmite film, 311a, 312A inner surface.

Claims (2)

  1. 　中空部を有し、互いに突き合わせ連結される一対のアルミ型材と、
    　前記一対のアルミ型材の連結部に設けられ、前記中空部内に挿入されるスリーブと、
    　前記スリーブの表面に配置される炭素繊維強化樹脂部材と、を備え、
    　前記連結部における前記一対のアルミ型材の内周面には、アルマイト皮膜又はベーマイト皮膜が設けられている、アルミ型材の連結構造。     a pair of aluminum shapes having a hollow portion and being butted and connected to each other;
    a sleeve provided at the connecting portion of the pair of aluminum shapes and inserted into the hollow portion;
    a carbon fiber reinforced resin member disposed on the surface of the sleeve,
    A connecting structure of aluminum shapes, wherein an alumite film or a boehmite film is provided on an inner circumferential surface of the pair of aluminum shapes in the connecting portion.
  2. 　前記炭素繊維強化樹脂部材と、前記内周面との間には、２．０ｍｍ以下の隙間が形成されている、請求項１に記載のアルミ型材の連結構造。 The aluminum profile connection structure according to claim 1, wherein a gap of 2.0 mm or less is formed between the carbon fiber reinforced resin member and the inner peripheral surface.
PCT/JP2023/009605 2022-04-13 2023-03-13 Connection structure for aluminum shaped sections WO2023199674A1 (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02127807U (en) * 1989-03-31 1990-10-22
JP2019137205A (en) * 2018-02-09 2019-08-22 藤倉コンポジット株式会社 Oar
JP2021151746A (en) * 2020-03-24 2021-09-30 新東工業株式会社 Manufacturing method for composite members and composite members

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02127807U (en) * 1989-03-31 1990-10-22
JP2019137205A (en) * 2018-02-09 2019-08-22 藤倉コンポジット株式会社 Oar
JP2021151746A (en) * 2020-03-24 2021-09-30 新東工業株式会社 Manufacturing method for composite members and composite members

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