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WO2025197743A1 - Fastening structure - Google Patents

Fastening structure

Info

Publication number
WO2025197743A1
WO2025197743A1 PCT/JP2025/009585 JP2025009585W WO2025197743A1 WO 2025197743 A1 WO2025197743 A1 WO 2025197743A1 JP 2025009585 W JP2025009585 W JP 2025009585W WO 2025197743 A1 WO2025197743 A1 WO 2025197743A1
Authority
WO
WIPO (PCT)
Prior art keywords
bolt
hole
collar
fastening structure
head
Prior art date
Legal status (The legal status 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 status listed.)
Pending
Application number
PCT/JP2025/009585
Other languages
French (fr)
Japanese (ja)
Inventor
浩 棚田
ひかり 黒田
幸成 八木下
駆 中村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Motors Corp
Original Assignee
Mitsubishi Motors Corp
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 Mitsubishi Motors Corp filed Critical Mitsubishi Motors Corp
Publication of WO2025197743A1 publication Critical patent/WO2025197743A1/en
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • F16B43/00—Washers or equivalent devices; Other devices for supporting bolt-heads or nuts
    • 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
    • F16B5/00—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them
    • F16B5/02—Joining sheets or plates, e.g. panels, to one another or to strips or bars parallel to them by means of fastening members using screw-thread
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/271—Lids or covers for the racks or secondary casings

Definitions

  • This disclosure relates to a fastening structure.
  • Patent Document 1 discloses a battery pack in which a tray and a cover are fastened together with bolts.
  • the tray has a through-hole formed therein through which the bolt passes, and a nut is welded to the tray so that it is concentric with the through-hole, and the cover has another through-hole formed therein through which the bolt passes.
  • Patent Document 2 discloses a recycling method that involves roasting battery packs as they are. This recycling method is said to cause the resin parts and insulating materials inside the battery pack to thermally decompose, causing a short circuit within the battery pack, destroying the battery pack's functionality and ensuring a reliable discharge process. This avoids the need to dismantle the battery packs under high voltage, eliminates the need for long-term storage to allow for natural discharge before roasting, and also eliminates the need for forced discharge, resulting in a recycling method that is safer, shorter, and more efficient than conventional methods.
  • tray and cover disclosed in Patent Document 1 are made of metal, even if the battery pack is roasted as is using the recycling method disclosed in Patent Document 2, the tray and cover will remain fastened together with bolts, and after roasting the battery pack, work such as cutting the bolts will be required.
  • At least one embodiment of the present invention aims to provide a fastening structure that can be released by roasting.
  • a fastening structure in which a bolt passes through a first member and a second member, a first through hole provided in the first member through which the bolt passes is larger than the head of the bolt, and a first collar is provided between the first member and the head of the bolt, the first collar being larger than the first through hole and through which the shank of the bolt passes, and the first collar is made of a material with a lower melting point than the bolt.
  • the configuration of (1) above includes a first spacer that fits into the first through hole, the first spacer being thinner than the first member and through which the threaded portion of the bolt passes.
  • the first spacer can determine the position of the bolt relative to the first through hole, preventing the bolt from loosening.
  • the second through hole provided in the second member through which the bolt passes is a threaded hole into which the threaded portion of the bolt fits.
  • a nut is provided into which the threaded portion of the bolt passing through a second through hole provided in the second member is fitted, and the nut is larger than the second through hole.
  • the threaded portion of the bolt passing through the first through hole and the second through hole can be fitted into the nut, thereby fastening the first member and the second member together.
  • the second through hole provided in the second member through which the bolt passes is larger than the head of the bolt, and a second collar larger than the second through hole and through which the shank of the bolt passes is provided between the second member and a nut fitted onto the threaded portion of the bolt passing through the second through hole.
  • the nut can be inserted into the second Even if the second collar is smaller than the through hole, the threaded portion of the bolt that passes through the second collar can fit into the nut, thereby fastening the first member and the second member together.
  • the second through hole provided in the second member through which the bolt passes is the same size as the first through hole, and is provided between the second member and a nut that fits onto the threaded portion of the bolt that passes through the second through hole.
  • the second collar is larger than the second through hole and through which the shank of the bolt passes; and a common spacer is provided between the first collar and the second collar, has a thickness thinner than the sum of the thicknesses of the first member and the second member, and is fitted into the first through hole and the second through hole, through which the threaded portion of the bolt passes.
  • the common spacer can determine the position of the bolt relative to the first through hole and the second through hole, preventing the bolt from loosening.
  • the first through hole has a large diameter portion larger than the head of the bolt and a small diameter portion smaller than the head of the bolt.
  • the threaded portion of the bolt is positioned in the small diameter portion, allowing the first member and the second member to be fastened together.
  • the fastening structure is roasted at a temperature equal to or higher than the melting point of the first collar but lower than the melting point of the bolt, the first collar melts, allowing the fastening structure to be released. Then, the threaded portion of the bolt can be moved to the large diameter portion, allowing the first member to be removed from the second member.
  • the fastening structure can be released by roasting.
  • FIG. 1 is a cross-sectional view schematically illustrating a fastening structure according to a first embodiment.
  • 1B is a cross-sectional view showing a state in which the first collar and the first spacer shown in FIG. 1A are melted;
  • FIG. 1C is a cross-sectional view showing a state in which the first member shown in FIG. 1B is removed.
  • FIG. 10 is a cross-sectional view schematically illustrating a fastening structure according to a second embodiment.
  • 2B is a cross-sectional view showing a state in which the first collar and the common spacer shown in FIG. 2A are melted;
  • 2C is a cross-sectional view showing a state in which the bolt and the nut have fallen off from the first member and the second member shown in FIG. 2B.
  • FIG. 10 is a diagram schematically illustrating a fastening structure according to a third embodiment.
  • 3B is a cross-sectional view showing a state in which the first collar, the second collar, and the common spacer shown in FIG. 3A are melted;
  • 3C is a cross-sectional view showing a state in which the bolt and the nut have fallen off from the first member and the second member shown in FIG. 3B.
  • FIG. 10A and 10B are diagrams schematically illustrating a fastening structure according to a fourth embodiment, in which FIG. 10A is a cross-sectional view and FIG. 4B is a diagram showing a state in which the first collar and the second collar shown in FIG.
  • FIG. 4A is melted, in which (a) is a cross-sectional view and (b) is a plan view.
  • FIG. 4C is a diagram showing a state in which the bolt and nut shown in FIG. 4B have been moved from the small diameter portion to the large diameter portion, where (a) is a cross-sectional view and (b) is a plan view.
  • FIG. 4D is a diagram showing a state in which the bolt and the nut have fallen off from the first member and the second member shown in FIG. 4C, where (a) is a cross-sectional view and (b) is a plan view.
  • FIG. 4C is a diagram showing a state in which the bolt and the nut shown in FIG. 4B have been moved from the small diameter portion to the large diameter portion, where (a) is a cross-sectional view and (b) is a plan view.
  • FIG. 4D is a diagram showing a state in which the bolt and the nut have fallen off from the first member and the second member shown
  • the fastening structures 1 to 4 are fastening structures in which a bolt passes through a first member and a second member, and are employed, for example, in a battery pack in which a tray and a cover are fastened together by the bolt.
  • the battery pack is mounted on an electric vehicle such as an electric vehicle (EV), a hybrid vehicle (HV), or a fuel cell vehicle (FCV).
  • EV electric vehicle
  • HV hybrid vehicle
  • FCV fuel cell vehicle
  • Hybrid vehicles include plug-in hybrid vehicles (PHVs, PHEVs) that can be charged (externally charged) from an external device (e.g., a quick charger) while parked, and plug-in hybrid vehicles (PHEVs) that can be charged externally while parked and can supply power (externally powered) to an external device (e.g., a general household) while parked.
  • PVs plug-in hybrid vehicles
  • PHEVs plug-in hybrid vehicles
  • PHEVs plug-in hybrid vehicles
  • PHEVs plug-in hybrid vehicles
  • FIG. 1A is a cross-sectional view schematically illustrating a fastening structure 1 according to embodiment 1.
  • Fig. 1B is a cross-sectional view illustrating a state in which the first collar 14 and the first spacer 15 illustrated in Fig. 1A have melted
  • Fig. 1C is a cross-sectional view illustrating a state in which the first member 11 illustrated in Fig. 1B has been removed.
  • the first member 11 and the second member 12 are plate-like bodies.
  • the first member 11 has a first through hole 11a through which the bolt 13 passes
  • the second member 12 has a second through hole 12a through which the bolt 13 passes.
  • the bolt 13 also includes what are called screws or screws.
  • the bolt 13 is, for example, a hexagonal bolt, but is not limited to this and may be a hexagonal socket bolt.
  • the first through hole 11a is larger than the head 13a of the bolt 13 and allows the head 13a of the bolt 13 to pass through.
  • the first through hole 11a is, for example, a circular through hole in plan view that is larger than the head 13a of the bolt 13.
  • the first through hole 11a has a diameter greater than the diagonal length of the hexagon, but is not limited to this and may be a through hole of a shape similar to the head shape of the bolt 13.
  • a first collar 14 is provided between the first member 11 and the head 13a of the bolt 13.
  • the first collar 14 is larger than the first through-hole 11a and receives the threaded portion 13b of the bolt 13.
  • the first collar 14 is circular in a plan view, but is not limited to this and may be rectangular in a plan view.
  • the first collar 14 is made of a material with a lower melting point than the bolt 13, and melts when the fastening structure 1 is roasted at a temperature equal to or higher than the melting point of the first collar 14 but lower than the melting point of the bolt 13.
  • the bolt 13 is made of iron or stainless steel
  • the first collar 14 is made of aluminum or the like, but may also be made of resin or the like.
  • the fastening structure 1 may include a first spacer 15 that fits into the first through hole 11a.
  • the first spacer 15 is thinner than the first member 11 and has a through hole 15a through which the threaded portion 13b of the bolt 13 passes.
  • the first spacer 15 is circular in plan view and has a through hole 15a at its center through which the threaded portion 13b of the bolt 13 passes, but this is not limited to this.
  • the first spacer 15 may have the same or similar shape as the first through hole 11a and may have a through hole 15a at its center through which the threaded portion 13b of the bolt 13 passes.
  • the first spacer 15 is made of a material with a lower melting point than the bolt 13 and melts when the fastening structure 1 is roasted at a temperature equal to or higher than the melting point of the first spacer 15 but lower than the melting point of the bolt 13.
  • the first spacer 15 is made of aluminum or the like, but may also be made of resin or the like.
  • the first spacer 15 may be made of the same material as the bolt 13, regardless of the melting point of the bolt 13, as long as it can be easily removed from the first through hole 11a.
  • the second through hole 12a is a threaded hole into which the threaded portion 13b of the bolt 13 fits.
  • a first spacer 15 that fits into the first through hole 11a is provided, so that the position of the bolt 13 relative to the first through hole 11a can be determined by the first spacer 15, and loosening of the bolt 13 can be suppressed.
  • the second through hole 12a is a threaded hole into which the threaded portion 13b of the bolt 13 fits, so that the first member 11 and the second member 12 can be fastened together by fitting the threaded portion 13b of the bolt 13 into the threaded hole (second through hole 12a).
  • the first collar 14 and first spacer 15 melt, allowing the fastening structure 1 to be released.
  • the head 13a of the bolt 13 can then pass through the first through-hole 11a, allowing the first member 11 to be removed from the second member 12.
  • Fig. 2A is a cross-sectional view schematically illustrating a fastening structure 2 according to embodiment 2.
  • Fig. 2B is a cross-sectional view illustrating a state in which the first collar 14 and the common spacer 25 shown in Fig. 2A have melted
  • Fig. 2C is a cross-sectional view illustrating a state in which the bolt 13 and the nut 26 have fallen off the first member 11 and the second member 12 shown in Fig. 2B.
  • the fastening structure 2 of embodiment 2 includes a nut 26 into which the threaded portion 13b of the bolt 13 passing through the second through hole 12a fits.
  • the nut 26 is larger than the second through hole 22a and cannot be inserted through the second through hole 22a.
  • the second through hole 22a of embodiment 2 has the same shape and size as the first through hole 11a, is larger than the head 13a of the bolt 13, and can be inserted through the head 13a of the bolt 13.
  • the fastening structure 2 of embodiment 2 may include a common spacer 25 that fits into the first through hole 11a and the second through hole 22a.
  • the common spacer 25 is thinner than the sum of the thicknesses of the first member 11 and the second member 12, and has a through hole 25a through which the threaded portion 13b of the bolt 13 passes.
  • the common spacer 25 is circular in plan view, and has a through hole 25a at its center through which the threaded portion 13b of the bolt 13 passes, but is not limited to this.
  • the common spacer 25 may have the same or similar shape as the first through hole 11a and the second through hole 22a, and may have a through hole 25a at its center through which the threaded portion 13b of the bolt 13 passes.
  • the common spacer 25 is made of a material with a lower melting point than the bolt 13, and melts when the fastening structure 2 is roasted at a temperature equal to or higher than the melting point of the common spacer 25 but lower than the melting point of the bolt 13.
  • the common spacer 25 is made of aluminum or other materials, but it may also be made of resin or other materials.
  • the common spacer 25 may be made of any material, regardless of its melting point, as long as it can be easily removed from the first through hole 11a and the second through hole 22a. The rest of the configuration is the same as that of the fastening structure 1 according to embodiment 1.
  • the common spacer 25 allows the position of the bolt 13 relative to the first through hole 11a and the second through hole 22a to be determined, thereby preventing the bolt 13 from loosening.
  • the second through hole 22a in embodiment 2 may be large enough to allow the threaded portion 13b of the bolt 13 to pass through, but large enough to prevent the head 13a of the bolt 13 from passing through.
  • the first spacer 15 can be fitted into the first through hole 11a, and a nut of the same size as the head 13a of the bolt 13 can be used. Also, in this case, even if the first collar 14 and first spacer 15 melt, the head 13a of the bolt 13 cannot pass through the second through hole 22a, but can pass through the first through hole 11a, allowing the first member 11 to be removed from the second member 12.
  • Fig. 3A is a diagram schematically illustrating a fastening structure 3 according to embodiment 3.
  • Fig. 3B is a cross-sectional view illustrating a state in which the first collar 14, the second collar 37, and the common spacer 25 shown in Fig. 3A have melted
  • Fig. 3C is a cross-sectional view illustrating a state in which the bolt 13 and the nut 36 have fallen off the first member 11 and the second member 12 shown in Fig. 3B.
  • the fastening structure 3 of embodiment 3 includes a second collar 37 between the second member 12 and a nut 36 that fits onto the threaded portion 13b of the bolt 13 that passes through the second through hole 22a.
  • the second collar 37 is larger than the second through hole 22a and receives the threaded portion 13b of the bolt 13.
  • the second collar 37 has a circular disk shape in plan view, but is not limited to this and may have a rectangular plate shape in plan view.
  • the second collar 37 is made of a material with a lower melting point than the bolt 13 and melts when the fastening structure 3 is roasted at a temperature equal to or higher than the melting point of the first collar 14 but lower than the melting point of the bolt 13.
  • the second collar 37 may be made of the same material as the bolt 13, regardless of the melting point of the bolt 13. The rest of the configuration is the same as the fastening structure 2 of embodiment 2.
  • the second collar 37 is larger than the second through hole 22a, so even if the nut 36 is smaller than the second through hole 22a, the threaded portion 13b of the bolt 13 that passes through the second collar 37 can fit into the nut 26, thereby fastening the first member 11 and the second member 12 together.
  • Fig. 4A is a diagram schematically illustrating a fastening structure 4 according to embodiment 4, where (a) is a cross-sectional view and (b) is a plan view.
  • Fig. 4B is a diagram illustrating a state in which the first collar 44 and the second collar 47 shown in Fig. 4A have melted, where (a) is a cross-sectional view and (b) is a plan view.
  • Fig. 4C is a diagram illustrating a state in which the bolt 13 and the nut 46 shown in Fig. 4B have been moved from the small diameter portion 41a2 to the large diameter portion 41a1, where (a) is a cross-sectional view and (b) is a plan view.
  • Fig. 4D is a diagram illustrating a state in which the bolt 13 and the nut 46 have fallen off the first member 11 and the second member 12 shown in Fig. 4C, where (a) is a cross-sectional view and (b) is a plan view.
  • the first through hole 41a has a large diameter portion 41a1 that is larger than the head 13a of the bolt 13, and a small diameter portion 41a2 that is smaller than the head 13a of the bolt 13.
  • the head 13a of the bolt 13 can be inserted into the large diameter portion 41a1, and the head 13a of the bolt 13 cannot be inserted into the small diameter portion 41a2.
  • the second through hole 42a according to embodiment 4 has the same shape and size as the first through hole 41a, and the head 13a of the bolt 13 can be inserted into the large diameter portion and the head 13a of the bolt 13 cannot be inserted into the small diameter portion.
  • the second through hole 42a may be smaller than the head 13a of the bolt 13 and cannot be inserted into, as long as the threaded portion 13b of the bolt 13 can be inserted into it.
  • a first collar 44 is provided between the first member 11 and the head 13a of the bolt 13.
  • the first collar 44 is larger than the large diameter portion 41a1 of the first through-hole 41a and receives the threaded portion 13b of the bolt 13.
  • the first collar 44 has a circular disk shape in a plan view, but is not limited to this and may also have a rectangular plate shape in a plan view.
  • the first collar 44 is made of a material with a lower melting point than the bolt 13, and melts when the fastening structure 4 is roasted at a temperature equal to or higher than the melting point of the first collar 44 but lower than the melting point of the bolt 13.
  • the bolt 13 is made of iron or stainless steel
  • the first collar 44 is made of aluminum or the like, but may also be made of resin or the like.
  • the second collar 47 is provided between the nut 46 and the second member 12 and engages with the threaded portion 13b of the bolt 13 passing through the second through hole 42a. Like the first collar 44, the second collar 47 is larger than the large-diameter portion of the second through hole 42a and receives the threaded portion 13b of the bolt 13.
  • the second collar 47 has a circular disk shape in a plan view, but is not limited to this and may also have a rectangular plate shape in a plan view.
  • the second collar 47 is made of a material with a lower melting point than the bolt 13 and melts when the fastening structure 4 is roasted at a temperature equal to or higher than the melting point of the first collar 44 but lower than the melting point of the bolt 13.
  • the second collar 47 may be made of the same material as the bolt 13, regardless of the melting point of the bolt 13. Furthermore, if the second through hole 42a is smaller than the head 13a of the bolt 13 and the head 13a of the bolt 13 cannot be inserted, the second collar 47 is not necessary. Other configurations are the same as those of the fastening structure 1 according to embodiment 1.
  • the threaded portion 13b of the bolt 13 is located in the small diameter portion, allowing the first member 11 and the second member 12 to be fastened together.
  • the fastening structure 4 is roasted at a temperature equal to or higher than the melting temperature of the first collar 44 and the second collar 47 but lower than the melting point of the bolt 13, the first collar 44 and the second collar 47 melt, allowing the fastening of the fastening structure 4 to be released.
  • the threaded portion 13b of the bolt 13 to the large diameter portion 41a1
  • the bolt 13 and the nut 46 fall off from the first member 11 and the second member 12, allowing the first member 11 to be removed from the second member 12.
  • the present invention is not limited to the above-described embodiments, but includes modifications to the above-described embodiments and appropriate combinations of these embodiments.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Connection Of Plates (AREA)

Abstract

A fastening structure having a bolt passing through a first member and a second member, wherein a first through-hole which is provided in the first member through which the bolt passes is larger than a head part of the bolt, and a first collar which is larger than the first through-hole and through which a shaft part of the bolt passes is provided between the first member and the head part of the bolt, the first collar being made of a material having a lower melting point than the bolt.

Description

締結構造Fastening structure

　本開示は、締結構造に関する。 This disclosure relates to a fastening structure.

　特許文献１には、トレーとカバーをボルトによって締結固定された電池パックが開示されている。トレーには、ボルトが挿通する挿通孔が形成され、挿通孔と同心状に連通するナットが溶接され、カバーには、ボルトが挿通する挿通孔が形成される。 Patent Document 1 discloses a battery pack in which a tray and a cover are fastened together with bolts. The tray has a through-hole formed therein through which the bolt passes, and a nut is welded to the tray so that it is concentric with the through-hole, and the cover has another through-hole formed therein through which the bolt passes.

　特許文献２には、電池パックをそのまま焙焼する工程を有するリサイクル方法が開示されている。かかるリサイクル方法によれば、電池パック内の樹脂部品や絶縁材料が熱分解し、電池パック内において短絡が生じるので、電池パックの機能が破壊され、確実に放電処理を行うことができるとされている。これにより、高電圧下での電池パックの解体作業を回避できるとともに、焙焼前の自然放電のための長期保管も不要となり、また、強制放電の手間も省け、従来に比べより短時間でかつ安全で作業効率が向上するとされている。 Patent Document 2 discloses a recycling method that involves roasting battery packs as they are. This recycling method is said to cause the resin parts and insulating materials inside the battery pack to thermally decompose, causing a short circuit within the battery pack, destroying the battery pack's functionality and ensuring a reliable discharge process. This avoids the need to dismantle the battery packs under high voltage, eliminates the need for long-term storage to allow for natural discharge before roasting, and also eliminates the need for forced discharge, resulting in a recycling method that is safer, shorter, and more efficient than conventional methods.

特開２０１９－７５３２９号公報Japanese Patent Application Laid-Open No. 2019-75329 特開２０１０－３５１２号公報Japanese Patent Application Laid-Open No. 2010-3512

　特許文献１に開示されたトレーとカバーが金属製である場合に、特許文献２に開示されたリサイクル方法によって、電池パックをそのまま焙焼しても、トレーとカバーがボルトで締結されたままで残るため、電池パックの焙焼後に、ボルトを切断する等の作業が必要となる。 If the tray and cover disclosed in Patent Document 1 are made of metal, even if the battery pack is roasted as is using the recycling method disclosed in Patent Document 2, the tray and cover will remain fastened together with bolts, and after roasting the battery pack, work such as cutting the bolts will be required.

　上述の事情に鑑みて、本発明の少なくとも一実施形態は、焙焼によって締結構造の締結が解放することができる締結構造を提供することを課題とする。 In light of the above circumstances, at least one embodiment of the present invention aims to provide a fastening structure that can be released by roasting.

　（１）本発明の少なくとも一実施形態に係る締結構造は、第１部材と第２部材をボルトが貫通する締結構造であって、前記ボルトが貫通する前記第１部材に設けられた第１貫通穴は、前記ボルトの頭部よりも大きく、前記第１部材と前記ボルトの頭部との間には、前記第１貫通穴よりも大きく、前記ボルトの軸部が貫通する第１カラーを備え、前記第１カラーは、前記ボルトよりも融点の低い材料で構成される。 (1) In at least one embodiment of the present invention, a fastening structure is provided in which a bolt passes through a first member and a second member, a first through hole provided in the first member through which the bolt passes is larger than the head of the bolt, and a first collar is provided between the first member and the head of the bolt, the first collar being larger than the first through hole and through which the shank of the bolt passes, and the first collar is made of a material with a lower melting point than the bolt.

　上記（１）の構成によれば、第１カラーが融解する温度以上であって、ボルトの融点よりも低い温度で締結構造が焙焼されると、第１カラーが融解するので、締結構造の締結を解放することができる。そして、ボルトの頭部が第１貫通穴を通り抜け可能となるので、第２部材から第１部材を取り外すことができる。 In the configuration (1) above, when the fastening structure is roasted at a temperature equal to or higher than the melting point of the first collar but lower than the melting point of the bolt, the first collar melts, allowing the fastening structure to be released. The head of the bolt can then pass through the first through-hole, allowing the first member to be removed from the second member.

　（２）幾つかの実施形態では、上記（１）の構成において、前記第１貫通穴に嵌る第１スペーサを備え、前記第１スペーサは、前記第１部材よりも厚みが薄く、かつ前記ボルトのネジ部が貫通する。 (2) In some embodiments, the configuration of (1) above includes a first spacer that fits into the first through hole, the first spacer being thinner than the first member and through which the threaded portion of the bolt passes.

　上記（２）の構成によれば、第１スペーサによって第１貫通穴に対するボルトの位置を決定することができ、ボルトのゆるみを抑制することができる。 With the configuration (2) above, the first spacer can determine the position of the bolt relative to the first through hole, preventing the bolt from loosening.

　（３）幾つかの実施形態では、上記（１）又は（２）の構成において、前記ボルトが貫通する前記第２部材に設けられた第２貫通穴は、前記ボルトのネジ部が嵌るネジ穴である。 (3) In some embodiments, in the configuration described in (1) or (2) above, the second through hole provided in the second member through which the bolt passes is a threaded hole into which the threaded portion of the bolt fits.

　上記（３）の構成によれば、ボルトのネジ部がネジ穴に嵌まることで、第１部材と第２部材を締結することができる。 In the configuration (3) above, the threaded portion of the bolt fits into the screw hole, thereby fastening the first member and the second member together.

　（４）幾つかの実施形態では、上記（１）又は（２）の構成において、前記第２部材に設けられた第２貫通穴を貫通した前記ボルトのネジ部が嵌るナットを備え、前記ナットは、前記第２貫通穴よりも大きい。 (4) In some embodiments, in the configuration described in (1) or (2) above, a nut is provided into which the threaded portion of the bolt passing through a second through hole provided in the second member is fitted, and the nut is larger than the second through hole.

　上記（４）の構成によれば、第１貫通穴及び第２貫通穴を貫通したボルトのネジ部がナットに嵌まることで、第１部材と第２部材を締結することができる。 According to the configuration (4) above, the threaded portion of the bolt passing through the first through hole and the second through hole can be fitted into the nut, thereby fastening the first member and the second member together.

　（５）幾つかの実施形態では、上記（１）又は（２）の構成において、前記ボルトが貫通する前記第２部材に設けられた第２貫通穴は、前記ボルトの頭部よりも大きく、前記第２貫通穴を貫通した前記ボルトのネジ部に嵌るナットと前記第２部材との間には、前記第２貫通穴よりも大きく、前記ボルトの軸部が貫通する第２カラーを備える。 (5) In some embodiments, in the configuration described in (1) or (2) above, the second through hole provided in the second member through which the bolt passes is larger than the head of the bolt, and a second collar larger than the second through hole and through which the shank of the bolt passes is provided between the second member and a nut fitted onto the threaded portion of the bolt passing through the second through hole.

　上記（５）の構成によれば、第２カラーが第２貫通穴よりも大きいので、ナットが第２
貫通穴よりも小さくても、第２カラーを貫通したボルトのネジ部がナットに嵌ることで、第１部材と第２部材を締結することができる。 According to the above configuration (5), since the second collar is larger than the second through hole, the nut can be inserted into the second
Even if the second collar is smaller than the through hole, the threaded portion of the bolt that passes through the second collar can fit into the nut, thereby fastening the first member and the second member together.

　（６）幾つかの実施形態では、上記（１）の構成において、前記ボルトが貫通する前記第２部材に設けられた第２貫通穴は、前記第１貫通穴と同じ大きさであり、前記第２貫通穴を貫通した前記ボルトのネジ部に嵌るナットと前記第２部材との間に設けられ、前記第２貫通穴よりも大きく、前記ボルトの軸部が貫通する第２カラーと、前記第１カラーと前記第２カラーとの間に設けられ、前記第１部材の厚みと前記第２部材の厚みの和よりも厚みが薄く、かつ前記ボルトのネジ部が貫通し、前記第１貫通穴及び前記第２貫通穴に嵌る共通スペーサと、を備える。 (6) In some embodiments, in the configuration of (1) above, the second through hole provided in the second member through which the bolt passes is the same size as the first through hole, and is provided between the second member and a nut that fits onto the threaded portion of the bolt that passes through the second through hole. The second collar is larger than the second through hole and through which the shank of the bolt passes; and a common spacer is provided between the first collar and the second collar, has a thickness thinner than the sum of the thicknesses of the first member and the second member, and is fitted into the first through hole and the second through hole, through which the threaded portion of the bolt passes.

　上記（６）の構成によれば、共通スペーサによって第１貫通穴及び第２貫通穴に対するボルトの位置を決定することができ、ボルトのゆるみを抑制することができる。 With the configuration (6) above, the common spacer can determine the position of the bolt relative to the first through hole and the second through hole, preventing the bolt from loosening.

　（７）幾つかの実施形態では、上記（１）の構成において、前記第１貫通穴は、前記ボルトの頭部よりも大きな大径部と、前記ボルトの頭部よりも小さな小径部と、を有する。 (7) In some embodiments, in the configuration of (1) above, the first through hole has a large diameter portion larger than the head of the bolt and a small diameter portion smaller than the head of the bolt.

　上記（７）の構成によれば、ボルトのネジ部が小径部に位置することで、第１部材と第２部材を締結することができ、第１カラーが融解する温度以上であって、ボルトの融点よりも低い温度で締結構造が焙焼されると、第１カラーが融解するので、締結構造の締結を解放することができる。そして、ボルトのネジ部を大径部に移動させることで、第２部材から第１部材を取り外すことができる。 In the configuration (7) above, the threaded portion of the bolt is positioned in the small diameter portion, allowing the first member and the second member to be fastened together. When the fastening structure is roasted at a temperature equal to or higher than the melting point of the first collar but lower than the melting point of the bolt, the first collar melts, allowing the fastening structure to be released. Then, the threaded portion of the bolt can be moved to the large diameter portion, allowing the first member to be removed from the second member.

　本発明の少なくとも一実施形態によれば、焙焼によって締結構造の締結を解放することができる。 According to at least one embodiment of the present invention, the fastening structure can be released by roasting.

実施形態１に係る締結構造を概略的に示す断面図である。1 is a cross-sectional view schematically illustrating a fastening structure according to a first embodiment. 図１Ａに示した第１カラー及び第１スペーサが融解した状態を示す断面図である。1B is a cross-sectional view showing a state in which the first collar and the first spacer shown in FIG. 1A are melted; 図１Ｂに示した第１部材を取り外した状態を示す断面図である。FIG. 1C is a cross-sectional view showing a state in which the first member shown in FIG. 1B is removed. 実施形態２に係る締結構造を概略的に示す断面図である。FIG. 10 is a cross-sectional view schematically illustrating a fastening structure according to a second embodiment. 図２Ａに示した第１カラー及び共通スペーサが融解した状態を示す断面図である。2B is a cross-sectional view showing a state in which the first collar and the common spacer shown in FIG. 2A are melted; 図２Ｂに示した第１部材及び第２部材からボルト及びナットが脱落した状態を示す断面図である。2C is a cross-sectional view showing a state in which the bolt and the nut have fallen off from the first member and the second member shown in FIG. 2B. 実施形態３に係る締結構造を概略的に示す図である。FIG. 10 is a diagram schematically illustrating a fastening structure according to a third embodiment. 図３Ａに示した第１カラー、第２カラー、及び共通スペーサが融解した状態を示す断面図である。3B is a cross-sectional view showing a state in which the first collar, the second collar, and the common spacer shown in FIG. 3A are melted; 図３Ｂに示した第１部材及び第２部材からボルト及びナットが脱落した状態を示す断面図である。3C is a cross-sectional view showing a state in which the bolt and the nut have fallen off from the first member and the second member shown in FIG. 3B. FIG. 実施形態４に係る締結構造を概略的に示す図であって、（ａ）は断面図であり、（ｂ）は平面図である。10A and 10B are diagrams schematically illustrating a fastening structure according to a fourth embodiment, in which FIG. 10A is a cross-sectional view and FIG. 図４Ａに示した第１カラー及び第２カラーが融解した状態を示す図であって、（ａ）は断面図であり、（ｂ）は平面図である。4B is a diagram showing a state in which the first collar and the second collar shown in FIG. 4A are melted, in which (a) is a cross-sectional view and (b) is a plan view. FIG. 図４Ｂに示したボルト及びナットを小径部から大径部に移動させた状態を示す図であって、（ａ）は断面図であり、（ｂ）は平面図である。4C is a diagram showing a state in which the bolt and nut shown in FIG. 4B have been moved from the small diameter portion to the large diameter portion, where (a) is a cross-sectional view and (b) is a plan view. FIG. 図４Ｃに示した第１部材及び第２部材からボルト及びナットが脱落した状態を示す図であって、（ａ）は断面図であり、（ｂ）は平面図である。4D is a diagram showing a state in which the bolt and the nut have fallen off from the first member and the second member shown in FIG. 4C, where (a) is a cross-sectional view and (b) is a plan view. FIG.

　以下、添付図面を参照して本発明の幾つかの実施形態について説明する。ただし、実施形態として記載されている又は図面に示されている構成部品の寸法、材質、形状、その相対的配置等は、本発明の範囲をこれに限定する趣旨ではなく、単なる説明例にすぎない。 Several embodiments of the present invention will be described below with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described as embodiments or shown in the drawings are not intended to limit the scope of the present invention and are merely illustrative examples.

［締結構造の概要］
　実施形態１から４に係る締結構造１～４は、第１部材と第２部材をボルトが貫通する締結構造であって、例えば、トレーとカバーをボルトによって締結する電池パックに採用される。電池パックは、例えば、電気自動車（ＥＶ）、ハイブリッド自動車（ＨＶ）、又は燃料電池自動車（ＦＣＶ）等の電動車両に搭載される。ハイブリッド自動車（ＨＶ）には、停車中に外部機器（例えば、急速充電器）から充電（外部充電）可能なプラグインハイブリッド自動車（ＰＨＶ，ＰＨＥＶ）や、停車中に外部充電可能であって、停車中に外部機器（例えば、一般家庭）に給電（外部給電）可能なプラグインハイブリッド自動車（ＰＨＥＶ）が含まれる。 [Outline of fastening structure]
The fastening structures 1 to 4 according to the first to fourth embodiments are fastening structures in which a bolt passes through a first member and a second member, and are employed, for example, in a battery pack in which a tray and a cover are fastened together by the bolt. The battery pack is mounted on an electric vehicle such as an electric vehicle (EV), a hybrid vehicle (HV), or a fuel cell vehicle (FCV). Hybrid vehicles (HVs) include plug-in hybrid vehicles (PHVs, PHEVs) that can be charged (externally charged) from an external device (e.g., a quick charger) while parked, and plug-in hybrid vehicles (PHEVs) that can be charged externally while parked and can supply power (externally powered) to an external device (e.g., a general household) while parked.

［実施形態１］
［締結構造］
　図１Ａは、実施形態１に係る締結構造１を概略的に示す断面図である。図１Ｂは、図１Ａに示した第１カラー１４及び第１スペーサ１５が融解した状態を示す断面図であり、図１Ｃは、図１Ｂに示した第１部材１１を取り外した状態を示す断面図である。 [Embodiment 1]
[Fastening structure]
Fig. 1A is a cross-sectional view schematically illustrating a fastening structure 1 according to embodiment 1. Fig. 1B is a cross-sectional view illustrating a state in which the first collar 14 and the first spacer 15 illustrated in Fig. 1A have melted, and Fig. 1C is a cross-sectional view illustrating a state in which the first member 11 illustrated in Fig. 1B has been removed.

　図１Ａに示すように、第１部材１１及び第２部材１２は、板状体であって、第１部材１１には、ボルト１３が貫通する第１貫通穴１１ａが設けられ、第２部材１２には、ボルト１３が貫通する第２貫通穴１２ａが設けられている。ボルト１３には、ネジ又はビスと称されるものも含まれる。ボルト１３は、例えば、六角ボルトであるが、これに限られるものではなく、六角穴付ボルトであってもよい。第１貫通穴１１ａは、ボルト１３の頭部１３ａよりも大きく、ボルト１３の頭部１３ａが挿通可能である。第１貫通穴１１ａは、例えば、ボルト１３の頭部１３ａよりも大きな平面視円形の貫通穴であって、六角ボルトの場合には六角形の対角線の長さよりも大きな直径を有する貫通穴であるがこれに限られるものではなく、ボルト１３の頭部形状と相似形状の貫通穴であってもよい。 As shown in FIG. 1A, the first member 11 and the second member 12 are plate-like bodies. The first member 11 has a first through hole 11a through which the bolt 13 passes, and the second member 12 has a second through hole 12a through which the bolt 13 passes. The bolt 13 also includes what are called screws or screws. The bolt 13 is, for example, a hexagonal bolt, but is not limited to this and may be a hexagonal socket bolt. The first through hole 11a is larger than the head 13a of the bolt 13 and allows the head 13a of the bolt 13 to pass through. The first through hole 11a is, for example, a circular through hole in plan view that is larger than the head 13a of the bolt 13. In the case of a hexagonal bolt, the first through hole 11a has a diameter greater than the diagonal length of the hexagon, but is not limited to this and may be a through hole of a shape similar to the head shape of the bolt 13.

　第１部材１１とボルト１３の頭部１３ａとの間には、第１貫通穴１１ａよりも大きく、ボルト１３のネジ部１３ｂが貫通する第１カラー１４を備えている。第１カラー１４は、平面視円形の円板状であるが、これに限られるものではなく、平面視矩形の板状であってもよい。第１カラー１４は、ボルト１３よりも低い融点の材料で構成され、第１カラー１４の融点以上であって、ボルト１３の融点よりも低い温度で締結構造１が焙焼された場合に融解される。第１カラー１４は、例えば、ボルト１３が鉄やステンレスの場合に、アルミニウム等で構成されるが、樹脂等であってもよい。 A first collar 14 is provided between the first member 11 and the head 13a of the bolt 13. The first collar 14 is larger than the first through-hole 11a and receives the threaded portion 13b of the bolt 13. The first collar 14 is circular in a plan view, but is not limited to this and may be rectangular in a plan view. The first collar 14 is made of a material with a lower melting point than the bolt 13, and melts when the fastening structure 1 is roasted at a temperature equal to or higher than the melting point of the first collar 14 but lower than the melting point of the bolt 13. For example, when the bolt 13 is made of iron or stainless steel, the first collar 14 is made of aluminum or the like, but may also be made of resin or the like.

　実施形態１に係る締結構造１は、第１貫通穴１１ａに嵌まる第１スペーサ１５を備えてもよい。第１スペーサ１５は、第１部材１１よりも厚みが薄く、かつボルト１３のネジ部１３ｂが貫通する貫通穴１５ａが設けられている。第１スペーサ１５は、平面視円形であって、その中心にボルト１３のネジ部１３ｂが貫通する貫通穴１５ａが設けられるがこれに限られるものではなく、第１貫通穴１１ａと同一形状又は相似形状であって、その中心にボルト１３のネジ部１３ｂが貫通する貫通穴１５ａが設けられるものであってもよい。第１スペーサ１５は、第１カラー１４と同じように、ボルト１３よりも低い融点の材料で構成され、第１スペーサ１５の融点以上であって、ボルト１３の融点よりも低い温度で締結構造１が焙煎された場合に融解される。第１スペーサ１５は、例えば、ボルト１３が鉄やステンレスの場合に、アルミニウム等で構成されるが、樹脂等であってもよい。尚、第１スペーサ１５は、第１貫通穴１１ａから簡単に外すことができるものであれば、ボルト１３の融点に関係なく、ボルト１３と同じ材料で構成してもよい。 The fastening structure 1 according to embodiment 1 may include a first spacer 15 that fits into the first through hole 11a. The first spacer 15 is thinner than the first member 11 and has a through hole 15a through which the threaded portion 13b of the bolt 13 passes. The first spacer 15 is circular in plan view and has a through hole 15a at its center through which the threaded portion 13b of the bolt 13 passes, but this is not limited to this. The first spacer 15 may have the same or similar shape as the first through hole 11a and may have a through hole 15a at its center through which the threaded portion 13b of the bolt 13 passes. Like the first collar 14, the first spacer 15 is made of a material with a lower melting point than the bolt 13 and melts when the fastening structure 1 is roasted at a temperature equal to or higher than the melting point of the first spacer 15 but lower than the melting point of the bolt 13. For example, when the bolt 13 is made of iron or stainless steel, the first spacer 15 is made of aluminum or the like, but may also be made of resin or the like. Furthermore, the first spacer 15 may be made of the same material as the bolt 13, regardless of the melting point of the bolt 13, as long as it can be easily removed from the first through hole 11a.

　実施形態１に係る締結構造１では、第２貫通穴１２ａは、ボルト１３のネジ部１３ｂが嵌るネジ穴である。 In the fastening structure 1 according to embodiment 1, the second through hole 12a is a threaded hole into which the threaded portion 13b of the bolt 13 fits.

［焙焼］
　実施形態１に係る締結構造１が、第１カラー１４及び第１スペーサ１５の融点以上であって、ボルト１３の融点よりも低い温度で焙焼されると、図１Ｂに示すように、第１カラー１４及び第１スペーサ１５が融解するので、実施形態１に係る締結構造１の締結が解放される。これにより、ボルト１３の頭部１３ａが第１貫通穴１１ａを通り抜け可能となるので、図１Ｃに示すように、第２部材１２から第１部材１１を取り外すことができる。 [Roasting]
When the fastening structure 1 according to embodiment 1 is roasted at a temperature equal to or higher than the melting point of the first collar 14 and the first spacer 15 but lower than the melting point of the bolt 13, the first collar 14 and the first spacer 15 melt, as shown in Fig. 1B, and the fastening structure 1 according to embodiment 1 is released. This allows the head 13a of the bolt 13 to pass through the first through hole 11a, and the first member 11 can be removed from the second member 12, as shown in Fig. 1C.

［効果］
　実施形態１に係る締結構造１によれば、第１貫通穴１１ａに嵌る第１スペーサ１５を備えるので、第１スペーサ１５によって第１貫通穴１１ａに対するボルト１３の位置を決定することができ、ボルト１３のゆるみを抑制することができる。 [effect]
According to the fastening structure 1 of embodiment 1, a first spacer 15 that fits into the first through hole 11a is provided, so that the position of the bolt 13 relative to the first through hole 11a can be determined by the first spacer 15, and loosening of the bolt 13 can be suppressed.

　また、第２貫通穴１２ａは、ボルト１３のネジ部１３ｂが嵌るネジ穴であるから、ボルト１３のネジ部１３ｂがネジ穴（第２貫通穴１２ａ）に嵌ることで、第１部材１１と第２部材１２を締結することができる。 Furthermore, the second through hole 12a is a threaded hole into which the threaded portion 13b of the bolt 13 fits, so that the first member 11 and the second member 12 can be fastened together by fitting the threaded portion 13b of the bolt 13 into the threaded hole (second through hole 12a).

　また、第１カラー１４及び第１スペーサ１５の融点以上であって、ボルト１３の融点よりも低い温度で焙焼されると、第１カラー１４及び第１スペーサ１５が融解するので、締結構造１の締結を開放することができる。そして、ボルト１３の頭部１３ａが第１貫通穴１１ａを通り抜け可能となるので、第２部材１２から第１部材１１を取り外すことができる。 Furthermore, when roasted at a temperature equal to or higher than the melting point of the first collar 14 and first spacer 15 but lower than the melting point of the bolt 13, the first collar 14 and first spacer 15 melt, allowing the fastening structure 1 to be released. The head 13a of the bolt 13 can then pass through the first through-hole 11a, allowing the first member 11 to be removed from the second member 12.

［実施形態２］
　図２Ａは、実施形態２に係る締結構造２を概略的に示す断面図である。図２Ｂは、図２Ａに示した第１カラー１４及び共通スペーサ２５が融解した状態を示す断面図であり、図２Ｃは、図２Ｂに示した第１部材１１及び第２部材１２からボルト１３及びナット２６が脱落した状態を示す断面図である。 [Embodiment 2]
Fig. 2A is a cross-sectional view schematically illustrating a fastening structure 2 according to embodiment 2. Fig. 2B is a cross-sectional view illustrating a state in which the first collar 14 and the common spacer 25 shown in Fig. 2A have melted, and Fig. 2C is a cross-sectional view illustrating a state in which the bolt 13 and the nut 26 have fallen off the first member 11 and the second member 12 shown in Fig. 2B.

　図２Ａに示すように、実施形態２に係る締結構造２は、第２貫通穴１２ａを貫通したボルト１３のネジ部１３ｂが嵌るナット２６を備えている。ナット２６は、第２貫通穴２２ａよりも大きく、第２貫通穴２２ａを挿通不能である。実施形態２に係る第２貫通穴２２ａは、第１貫通穴１１ａと同じ形状、同じ大きさであって、ボルト１３の頭部１３ａよりも大きく、ボルト１３の頭部１３ａが挿通可能である。 As shown in FIG. 2A, the fastening structure 2 of embodiment 2 includes a nut 26 into which the threaded portion 13b of the bolt 13 passing through the second through hole 12a fits. The nut 26 is larger than the second through hole 22a and cannot be inserted through the second through hole 22a. The second through hole 22a of embodiment 2 has the same shape and size as the first through hole 11a, is larger than the head 13a of the bolt 13, and can be inserted through the head 13a of the bolt 13.

　実施形態２に係る締結構造２は、第１貫通穴１１ａ及び第２貫通穴２２ａに嵌る共通スペーサ２５を備えてもよい。共通スペーサ２５は、第１部材１１の厚みと第２部材１２の厚みの和よりも薄く、かつボルト１３のネジ部１３ｂが貫通する貫通穴２５ａが設けられている。共通スペーサ２５は、平面視円形であって、その中心にボルト１３のネジ部１３ｂが貫通する貫通穴２５ａが設けられるがこれに限られるものではなく、第１貫通穴１１ａ及び第２貫通穴２２ａと同一形状又は相似形状であって、その中心にボルト１３のネジ部１３ｂが貫通する貫通穴２５ａが設けられるものであってもよい。共通スペーサ２５は、第１カラー１４と同じように、ボルト１３よりも低い融点の材料で構成され、共通スペーサ２５の融点以上であって、ボルト１３の融点よりも低い温度で締結構造２が焙煎された場合に融解される。共通スペーサ２５は、例えば、ボルト１３が鉄やステンレスの場合に、アルミニウム等で構成されるが、樹脂等であってもよい。尚、共通スペーサ２５は、第１貫通穴１１ａ及び第２貫通穴２２ａから簡単に外すことができるものであれば、融点に関係なく、どのような材料で構成してもよい。その他の構成は、実施形態１に係る締結構造１と同じである。 The fastening structure 2 of embodiment 2 may include a common spacer 25 that fits into the first through hole 11a and the second through hole 22a. The common spacer 25 is thinner than the sum of the thicknesses of the first member 11 and the second member 12, and has a through hole 25a through which the threaded portion 13b of the bolt 13 passes. The common spacer 25 is circular in plan view, and has a through hole 25a at its center through which the threaded portion 13b of the bolt 13 passes, but is not limited to this. The common spacer 25 may have the same or similar shape as the first through hole 11a and the second through hole 22a, and may have a through hole 25a at its center through which the threaded portion 13b of the bolt 13 passes. Like the first collar 14, the common spacer 25 is made of a material with a lower melting point than the bolt 13, and melts when the fastening structure 2 is roasted at a temperature equal to or higher than the melting point of the common spacer 25 but lower than the melting point of the bolt 13. For example, when the bolt 13 is made of iron or stainless steel, the common spacer 25 is made of aluminum or other materials, but it may also be made of resin or other materials. The common spacer 25 may be made of any material, regardless of its melting point, as long as it can be easily removed from the first through hole 11a and the second through hole 22a. The rest of the configuration is the same as that of the fastening structure 1 according to embodiment 1.

［焙焼］
　実施形態２に係る締結構造２が、第１カラー１４及び共通スペーサ２５の融点以上であって、ボルト１３の融点よりも低い温度で焙焼されると、図２Ｂに示すように、第１カラー１４及び共通スペーサ２５が融解するので、実施形態２に係る締結構造２の締結が解放される。これにより、ボルト１３の頭部１３ａが第１貫通穴１１ａ及び第２貫通穴２２ａを通り抜け可能となるので、図２Ｃに示すように、第１部材１１及び第２部材１２からボルト１３及びナット２６が脱落し、第２部材１２から第１部材１１を分離することができる。 [Roasting]
When the fastening structure 2 according to the second embodiment is roasted at a temperature equal to or higher than the melting point of the first collar 14 and the common spacer 25 but lower than the melting point of the bolt 13, the first collar 14 and the common spacer 25 melt, as shown in Fig. 2B, and the fastening of the fastening structure 2 according to the second embodiment is released. This allows the head 13a of the bolt 13 to pass through the first through hole 11a and the second through hole 22a, and the bolt 13 and the nut 26 fall off from the first member 11 and the second member 12, as shown in Fig. 2C, and the first member 11 can be separated from the second member 12.

［効果］
　実施形態２に係る締結構造２によれば、第１貫通穴１１ａ及び第２貫通穴２２ａを貫通したボルト１３のネジ部１３ｂがナット２６に嵌ることで、第１部材１１と第２部材１２を締結することができる。 [effect]
According to the fastening structure 2 of embodiment 2, the threaded portion 13b of the bolt 13 that passes through the first through hole 11a and the second through hole 22a fits into the nut 26, thereby fastening the first member 11 and the second member 12 together.

　また、共通スペーサ２５によって第１貫通穴１１ａ及び第２貫通穴２２ａに対するボルト１３の位置を決定することができ、ボルト１３のゆるみを抑制することができる。 Furthermore, the common spacer 25 allows the position of the bolt 13 relative to the first through hole 11a and the second through hole 22a to be determined, thereby preventing the bolt 13 from loosening.

　尚、実施形態２に係る第２貫通穴２２ａは、ボルト１３のネジ部１３ｂが挿通する大きさであって、ボルト１３の頭部１３ａが挿通不能な大きさであってもよい。この場合には、第１貫通穴１１ａに第１スペーサ１５を嵌めることができ、ボルト１３の頭部１３ａと同じ大きさのナットとすることができる。また、この場合には、第１カラー１４及び第１スペーサ１５が融解してもボルト１３の頭部１３ａは第２貫通穴２２ａを通り抜けることはできないが、第１貫通穴１１ａを通り抜けるので、第２部材１２から第１部材１１を取り外すことができる。 In addition, the second through hole 22a in embodiment 2 may be large enough to allow the threaded portion 13b of the bolt 13 to pass through, but large enough to prevent the head 13a of the bolt 13 from passing through. In this case, the first spacer 15 can be fitted into the first through hole 11a, and a nut of the same size as the head 13a of the bolt 13 can be used. Also, in this case, even if the first collar 14 and first spacer 15 melt, the head 13a of the bolt 13 cannot pass through the second through hole 22a, but can pass through the first through hole 11a, allowing the first member 11 to be removed from the second member 12.

［実施形態３］
　図３Ａは、実施形態３に係る締結構造３を概略的に示す図である。図３Ｂは、図３Ａに示した第１カラー１４、第２カラー３７、及び共通スペーサ２５が融解した状態を示す断面図であり、図３Ｃは、図３Ｂに示した第１部材１１及び第２部材１２からボルト１３及びナット３６が脱落した状態を示す断面図である。 [Embodiment 3]
Fig. 3A is a diagram schematically illustrating a fastening structure 3 according to embodiment 3. Fig. 3B is a cross-sectional view illustrating a state in which the first collar 14, the second collar 37, and the common spacer 25 shown in Fig. 3A have melted, and Fig. 3C is a cross-sectional view illustrating a state in which the bolt 13 and the nut 36 have fallen off the first member 11 and the second member 12 shown in Fig. 3B.

　図３Ａに示すように、実施形態３に係る締結構造３は、第２貫通穴２２ａを貫通したボルト１３のネジ部１３ｂに嵌るナット３６と第２部材１２との間に第２カラー３７を備えている。第２カラー３７は、第１カラー１４と同じように、第２貫通穴２２ａよりも大きく、ボルト１３のネジ部１３ｂが貫通する。第２カラー３７は、平面視円形の円板状であるが、これに限られるものではなく、平面視矩形の板状であってもよい。第２カラー３７は、第１カラー１４と同じように、ボルト１３よりも低い融点の材料で構成され、第１カラー１４の融点以上であって、ボルト１３の融点よりも低い温度で締結構造３が焙焼された場合に融解されるが、第１カラー１４と異なり、ボルト１３の融点に関係なく、ボルト１３と同じ材料で構成してもよい。その他の構成は、実施形態２に係る締結構造２と同じである。 As shown in FIG. 3A , the fastening structure 3 of embodiment 3 includes a second collar 37 between the second member 12 and a nut 36 that fits onto the threaded portion 13b of the bolt 13 that passes through the second through hole 22a. Like the first collar 14, the second collar 37 is larger than the second through hole 22a and receives the threaded portion 13b of the bolt 13. The second collar 37 has a circular disk shape in plan view, but is not limited to this and may have a rectangular plate shape in plan view. Like the first collar 14, the second collar 37 is made of a material with a lower melting point than the bolt 13 and melts when the fastening structure 3 is roasted at a temperature equal to or higher than the melting point of the first collar 14 but lower than the melting point of the bolt 13. However, unlike the first collar 14, the second collar 37 may be made of the same material as the bolt 13, regardless of the melting point of the bolt 13. The rest of the configuration is the same as the fastening structure 2 of embodiment 2.

［焙焼］
　実施形態３に係る締結構造３が、第１カラー１４、共通スペーサ２５、及び第２カラー３７の融点以上であって、ボルト１３の融点よりも低い温度で焙焼されると、図３Ｂに示すように、第１カラー１４、共通スペーサ２５、及び第２カラー３７が融解するので、実施形態３に係る締結構造３の締結が解放される。これにより、ボルト１３の頭部１３ａが第１貫通穴１１ａ及び第２貫通穴２２ａを通り抜け可能となるので、図３Ｃに示すように、第１部材１１及び第２部材１２からボルト１３及びナット３６が脱落し、第２部材１２から第１部材１１を分離することができる。 [Roasting]
When the fastening structure 3 according to embodiment 3 is roasted at a temperature equal to or higher than the melting points of the first collar 14, the common spacer 25, and the second collar 37 but lower than the melting point of the bolt 13, the first collar 14, the common spacer 25, and the second collar 37 melt, as shown in Fig. 3B, and the fastening structure 3 according to embodiment 3 is released. This allows the head 13a of the bolt 13 to pass through the first through hole 11a and the second through hole 22a, and the bolt 13 and the nut 36 fall off the first member 11 and the second member 12, as shown in Fig. 3C, and the first member 11 can be separated from the second member 12.

［効果］
　実施形態３に係る締結構造３によれば、第２カラー３７が第２貫通穴２２ａよりも大きいので、ナット３６が第２貫通穴２２ａよりも小さくても、第２カラー３７を貫通したボルト１３のネジ部１３ｂがナット２６に嵌ることで、第１部材１１と第２部材１２を締結することができる。 [effect]
According to the fastening structure 3 of embodiment 3, the second collar 37 is larger than the second through hole 22a, so even if the nut 36 is smaller than the second through hole 22a, the threaded portion 13b of the bolt 13 that passes through the second collar 37 can fit into the nut 26, thereby fastening the first member 11 and the second member 12 together.

［実施形態４］
　図４Ａは、実施形態４に係る締結構造４を概略的に示す図であって、（ａ）は断面図であり、（ｂ）は平面図である。図４Ｂは、図４Ａに示した第１カラー４４及び第２カラー４７が溶解した状態を示す図であって、（ａ）は断面図であり、（ｂ）は平面図である。図４Ｃは、図４Ｂに示したボルト１３及びナット４６を小径部４１ａ２から大径部４１ａ１に移動させた状態を示す図であって、（ａ）は断面図であり、（ｂ）は平面図である。図４Ｄは、図４Ｃに示した第１部材１１及び第２部材１２からボルト１３及びナット４６が脱落した状態を示す図であって、（ａ）は断面図であり、（ｂ）は平面図である。 [Embodiment 4]
Fig. 4A is a diagram schematically illustrating a fastening structure 4 according to embodiment 4, where (a) is a cross-sectional view and (b) is a plan view. Fig. 4B is a diagram illustrating a state in which the first collar 44 and the second collar 47 shown in Fig. 4A have melted, where (a) is a cross-sectional view and (b) is a plan view. Fig. 4C is a diagram illustrating a state in which the bolt 13 and the nut 46 shown in Fig. 4B have been moved from the small diameter portion 41a2 to the large diameter portion 41a1, where (a) is a cross-sectional view and (b) is a plan view. Fig. 4D is a diagram illustrating a state in which the bolt 13 and the nut 46 have fallen off the first member 11 and the second member 12 shown in Fig. 4C, where (a) is a cross-sectional view and (b) is a plan view.

　図４Ａに示すように、実施形態４に係る締結構造４では、第１貫通穴４１ａは、ボルト１３の頭部１３ａよりも大きな大径部４１ａ１と、ボルト１３の頭部１３ａよりも小さな小径部４１ａ２とを有する。大径部４１ａ１では、ボルト１３の頭部１３ａが挿通可能であって、小径部４１ａ２では、ボルト１３の頭部１３ａが挿通不能である。また、実施形態４に係る第２貫通穴４２ａは、第１貫通穴４１ａと同じ形状、同じ大きさであって、大径部では、ボルト１３の頭部１３ａが挿通可能であって、小径部では、ボルト１３の頭部１３ａが挿通不能であるが、第２貫通穴４２ａは、ボルト１３のネジ部１３ｂが挿通可能であれば、ボルト１３の頭部１３ａよりも小さく、ボルト１３の頭部１３ａが挿通不能であってもよい。 As shown in FIG. 4A, in the fastening structure 4 according to embodiment 4, the first through hole 41a has a large diameter portion 41a1 that is larger than the head 13a of the bolt 13, and a small diameter portion 41a2 that is smaller than the head 13a of the bolt 13. The head 13a of the bolt 13 can be inserted into the large diameter portion 41a1, and the head 13a of the bolt 13 cannot be inserted into the small diameter portion 41a2. The second through hole 42a according to embodiment 4 has the same shape and size as the first through hole 41a, and the head 13a of the bolt 13 can be inserted into the large diameter portion and the head 13a of the bolt 13 cannot be inserted into the small diameter portion. However, the second through hole 42a may be smaller than the head 13a of the bolt 13 and cannot be inserted into, as long as the threaded portion 13b of the bolt 13 can be inserted into it.

　第１部材１１とボルト１３の頭部１３ａとの間には、第１貫通穴４１ａの大径部４１ａ１よりも大きく、ボルト１３のネジ部１３ｂが貫通する第１カラー４４を備えている。第１カラー４４は、平面視円形の円板状であるが、これに限られるものではなく、平面視矩形の板状であってもよい。第１カラー４４は、ボルト１３よりも低い融点の材料で構成され、第１カラー４４の融点以上であって、ボルト１３の融点よりも低い温度で締結構造４が焙焼された場合に融解される。第１カラー４４は、例えば、ボルト１３が鉄やステンレスの場合に、アルミニウム等で構成されるが、樹脂等であってもよい。 A first collar 44 is provided between the first member 11 and the head 13a of the bolt 13. The first collar 44 is larger than the large diameter portion 41a1 of the first through-hole 41a and receives the threaded portion 13b of the bolt 13. The first collar 44 has a circular disk shape in a plan view, but is not limited to this and may also have a rectangular plate shape in a plan view. The first collar 44 is made of a material with a lower melting point than the bolt 13, and melts when the fastening structure 4 is roasted at a temperature equal to or higher than the melting point of the first collar 44 but lower than the melting point of the bolt 13. For example, when the bolt 13 is made of iron or stainless steel, the first collar 44 is made of aluminum or the like, but may also be made of resin or the like.

　第２貫通穴４２ａを貫通したボルト１３のネジ部１３ｂが嵌るナット４６を備え、ナット４６と第２部材１２との間には第２カラー４７を備えている。第２カラー４７は、第１カラー４４と同じように、第２貫通穴４２ａの大径部よりも大きく、ボルト１３のネジ部１３ｂが貫通する。第２カラー４７は、平面視円形の円板状であるが、これに限られるものではなく、平面視矩形の板状であってもよい。第２カラー４７は、第１カラー４４と同じように、ボルト１３よりも低い融点の材料で構成され、第１カラー４４の融点以上であって、ボルト１３の融点よりも低い温度で締結構造４が焙焼された場合に融解されるが、第１カラー４４と異なり、ボルト１３の融点に関係なく、ボルト１３と同じ材料で構成してもよい。また、第２貫通穴４２ａがボルト１３の頭部１３ａよりも小さく、ボルト１３の頭部１３ａが挿通不能であれば、第２カラー４７は不要である。その他の構成は、実施形態１に係る締結構造１と同じである。 The second collar 47 is provided between the nut 46 and the second member 12 and engages with the threaded portion 13b of the bolt 13 passing through the second through hole 42a. Like the first collar 44, the second collar 47 is larger than the large-diameter portion of the second through hole 42a and receives the threaded portion 13b of the bolt 13. The second collar 47 has a circular disk shape in a plan view, but is not limited to this and may also have a rectangular plate shape in a plan view. Like the first collar 44, the second collar 47 is made of a material with a lower melting point than the bolt 13 and melts when the fastening structure 4 is roasted at a temperature equal to or higher than the melting point of the first collar 44 but lower than the melting point of the bolt 13. However, unlike the first collar 44, the second collar 47 may be made of the same material as the bolt 13, regardless of the melting point of the bolt 13. Furthermore, if the second through hole 42a is smaller than the head 13a of the bolt 13 and the head 13a of the bolt 13 cannot be inserted, the second collar 47 is not necessary. Other configurations are the same as those of the fastening structure 1 according to embodiment 1.

［焙焼］
　実施形態４に係る締結構造４が、第１カラー４４、及び第２カラー４７の融点以上であって、ボルト１３の融点よりも低い温度で焙焼されると、図４Ｂに示すように、第１カラー４４、及び第２カラー４７が融解するので、実施形態４に係る締結構造４の締結が解放され、図４Ｃに示すように、ボルト１３が小径部４１ａ２から大径部４１ａ１への移動が可能となり、ボルト１３の頭部１３ａが第１貫通穴４１ａ及び第２貫通穴４２ａを通り抜け可能となるので、図４Ｄに示すように、第１部材１１及び第２部材１２からボルト１３及びナット４６が脱落し、第２部材１２から第１部材１１を分離することができる。 [Roasting]
When the fastening structure 4 according to the fourth embodiment is roasted at a temperature equal to or higher than the melting point of the first collar 44 and the second collar 47 but lower than the melting point of the bolt 13, the first collar 44 and the second collar 47 melt as shown in FIG. 4B , and the fastening of the fastening structure 4 according to the fourth embodiment is released. As shown in FIG. 4C , the bolt 13 can move from the small diameter portion 41 a 2 to the large diameter portion 41 a 1 , and the head 13 a of the bolt 13 can pass through the first through hole 41 a and the second through hole 42 a. As shown in FIG. 4D , the bolt 13 and the nut 46 fall off from the first member 11 and the second member 12, and the first member 11 can be separated from the second member 12.

　実施形態４に係る締結構造４によれば、ボルト１３のネジ部１３ｂが小径部に位置することで、第１部材１１と第２部材１２を締結することができ、第１カラー４４、及び第２カラー４７が融解する温度以上であって、ボルト１３の融点よりも低い温度で締結構造４が焙焼されると、第１カラー４４、及び第２カラー４７が融解するので、締結構造４の締結を解放することができる。そして、ボルト１３のネジ部１３ｂを大径部４１ａ１に移動させることで、第１部材１１及び第２部材１２からボルト１３及びナット４６が脱落するので、第２部材１２から第１部材１１を取り外すことができる。 In the fastening structure 4 of embodiment 4, the threaded portion 13b of the bolt 13 is located in the small diameter portion, allowing the first member 11 and the second member 12 to be fastened together. When the fastening structure 4 is roasted at a temperature equal to or higher than the melting temperature of the first collar 44 and the second collar 47 but lower than the melting point of the bolt 13, the first collar 44 and the second collar 47 melt, allowing the fastening of the fastening structure 4 to be released. Then, by moving the threaded portion 13b of the bolt 13 to the large diameter portion 41a1, the bolt 13 and the nut 46 fall off from the first member 11 and the second member 12, allowing the first member 11 to be removed from the second member 12.

　本発明は、上述した実施形態に限定されることはなく、上述した実施形態に変形を加えた形態や、これらの形態を適宜組み合わせた形態を含む。 The present invention is not limited to the above-described embodiments, but includes modifications to the above-described embodiments and appropriate combinations of these embodiments.

１　　締結構造
１１　　第１部材
１１ａ　　第１貫通穴
１２　　第２部材
１２ａ　　第２貫通穴
１３　　ボルト
１３ａ　　頭部
１４　　第１カラー
１５　　第１スペーサ
１５ａ　　貫通穴
２　　締結構造
２２ａ　　第２貫通穴
２５　　共通スペーサ
２５ａ　　貫通穴
２６　　ナット
３　　締結構造
３６　　ナット
３７　　第２カラー
４　　締結構造
４１ａ　　第１貫通穴
４１ａ１　　大径部
４１ａ２　　小径部
４２ｂ　　第２貫通穴
４４　　第１カラー
４６　　ナット
４７　　第２カラー 1 Fastening structure 11 First member 11a First through hole 12 Second member 12a Second through hole 13 Bolt 13a Head 14 First collar 15 First spacer 15a Through hole 2 Fastening structure 22a Second through hole 25 Common spacer 25a Through hole 26 Nut 3 Fastening structure 36 Nut 37 Second collar 4 Fastening structure 41a First through hole 41a1 Large diameter portion 41a2 Small diameter portion 42b Second through hole 44 First collar 46 Nut 47 Second collar

Claims (7)

　第１部材と第２部材をボルトが貫通する締結構造であって、
　前記ボルトが貫通する前記第１部材に設けられた第１貫通穴は、前記ボルトの頭部よりも大きく、
　前記第１部材と前記ボルトの頭部との間には、前記第１貫通穴よりも大きく、前記ボルトの軸部が貫通する第１カラーを備え、
　前記第１カラーは、前記ボルトよりも融点の低い材料で構成される締結構造。 A fastening structure in which a bolt passes through a first member and a second member,
a first through hole provided in the first member through which the bolt passes is larger than a head of the bolt;
a first collar between the first member and the head of the bolt, the first collar being larger than the first through hole and through which the shank of the bolt passes;
The first collar is made of a material having a lower melting point than the bolt. 　前記第１貫通穴に嵌る第１スペーサを備え、
　前記第１スペーサは、前記第１部材よりも厚みが薄く、かつ前記ボルトのネジ部が貫通する請求項１に記載の締結構造。 a first spacer fitted into the first through hole;
The fastening structure according to claim 1 , wherein the first spacer is thinner than the first member and has a threaded portion of the bolt passing therethrough. 　前記ボルトが貫通する前記第２部材に設けられた第２貫通穴は、前記ボルトのネジ部が嵌るネジ穴である、請求項１又は２に記載の締結構造。 The fastening structure described in claim 1 or 2, wherein the second through-hole provided in the second member through which the bolt passes is a threaded hole into which the threaded portion of the bolt fits. 　前記第２部材に設けられた第２貫通穴を貫通した前記ボルトのネジ部が嵌るナットを備え、
　前記ナットは、前記第２貫通穴よりも大きい、請求項１又は２に記載の締結構造。 a nut into which a threaded portion of the bolt passing through a second through hole provided in the second member is fitted,
The fastening structure according to claim 1 or 2, wherein the nut is larger than the second through hole. 　前記ボルトが貫通する前記第２部材に設けられた第２貫通穴は、前記ボルトの頭部よりも大きく、
　前記第２貫通穴を貫通した前記ボルトのネジ部に嵌るナットと前記第２部材との間には、前記第２貫通穴よりも大きく、前記ボルトの軸部が貫通する第２カラーを備えた請求項１又は２に記載の締結構造。 a second through hole provided in the second member through which the bolt passes is larger than a head of the bolt;
3. The fastening structure according to claim 1, wherein a second collar, which is larger than the second through hole and through which the shank of the bolt passes, is provided between the second member and a nut fitted to the threaded portion of the bolt passing through the second through hole. 　前記ボルトが貫通する前記第２部材に設けられた第２貫通穴は、前記第１貫通穴と同じ大きさであり、
　前記第２貫通穴を貫通した前記ボルトのネジ部に嵌るナットと前記第２部材との間に設けられ、前記第２貫通穴よりも大きく、前記ボルトの軸部が貫通する第２カラーと、
　前記第１カラーと前記第２カラーとの間に設けられ、前記第１部材の厚みと前記第２部材の厚みの和よりも厚みが薄く、かつ前記ボルトのネジ部が貫通し、前記第１貫通穴及び前記第２貫通穴に嵌る共通スペーサと、
を備えた、請求項１に記載の締結構造。 a second through hole provided in the second member through which the bolt passes has the same size as the first through hole;
a second collar provided between the second member and a nut fitted to a threaded portion of the bolt passing through the second through hole, the second collar being larger than the second through hole and through which a shank of the bolt passes;
a common spacer provided between the first collar and the second collar, the common spacer having a thickness smaller than the sum of the thickness of the first member and the thickness of the second member, the common spacer having a threaded portion of the bolt passing therethrough and fitted into the first through hole and the second through hole;
The fastening structure according to claim 1 , comprising: 　前記第１貫通穴は、前記ボルトの頭部よりも大きな大径部と、前記ボルトの頭部よりも小さな小径部と、を有する、請求項１に記載の締結構造。 The fastening structure described in claim 1, wherein the first through hole has a large diameter portion larger than the head of the bolt and a small diameter portion smaller than the head of the bolt.
PCT/JP2025/009585 2024-03-19 2025-03-13 Fastening structure Pending WO2025197743A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2024-043807 2024-03-19
JP2024043807 2024-03-19

Publications (1)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58169279U (en) * 1982-04-19 1983-11-11 日立金属株式会社 melting plug
JP2005220962A (en) * 2004-02-04 2005-08-18 Union Seimitsu:Kk Screw accessory and fastener structure using the same
JP2010003512A (en) * 2008-06-19 2010-01-07 Toyota Motor Corp Recycling method of battery pack and recycling device of battery pack
JP2010145039A (en) * 2008-12-19 2010-07-01 Max Co Ltd Equipment
JP2019075329A (en) * 2017-10-18 2019-05-16 三菱自動車工業株式会社 Electrical equipment case seal structure
JP2023530400A (en) * 2020-10-19 2023-07-18 エルジー エナジー ソリューション リミテッド Battery pack housing with fire suppression structure

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58169279U (en) * 1982-04-19 1983-11-11 日立金属株式会社 melting plug
JP2005220962A (en) * 2004-02-04 2005-08-18 Union Seimitsu:Kk Screw accessory and fastener structure using the same
JP2010003512A (en) * 2008-06-19 2010-01-07 Toyota Motor Corp Recycling method of battery pack and recycling device of battery pack
JP2010145039A (en) * 2008-12-19 2010-07-01 Max Co Ltd Equipment
JP2019075329A (en) * 2017-10-18 2019-05-16 三菱自動車工業株式会社 Electrical equipment case seal structure
JP2023530400A (en) * 2020-10-19 2023-07-18 エルジー エナジー ソリューション リミテッド Battery pack housing with fire suppression structure

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