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WO2019082984A1 - Boulon aveugle - Google Patents

Boulon aveugle

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Publication number
WO2019082984A1
WO2019082984A1 PCT/JP2018/039738 JP2018039738W WO2019082984A1 WO 2019082984 A1 WO2019082984 A1 WO 2019082984A1 JP 2018039738 W JP2018039738 W JP 2018039738W WO 2019082984 A1 WO2019082984 A1 WO 2019082984A1
Authority
WO
WIPO (PCT)
Prior art keywords
nut
diameter
inner nut
bolt
hole
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.)
Ceased
Application number
PCT/JP2018/039738
Other languages
English (en)
Japanese (ja)
Inventor
牧野　敬範
隆司 山口
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.)
Osaka Metropolitan University
University of Osaka NUC
Newfrey LLC
Original Assignee
Osaka University NUC
Osaka City University PUC
Newfrey LLC
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 Osaka University NUC, Osaka City University PUC, Newfrey LLC filed Critical Osaka University NUC
Publication of WO2019082984A1 publication Critical patent/WO2019082984A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • 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
    • F16B13/00—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose
    • F16B13/04—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front
    • F16B13/06—Dowels or other devices fastened in walls or the like by inserting them in holes made therein for that purpose with parts gripping in the hole or behind the reverse side of the wall after inserting from the front combined with expanding sleeve
    • 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
    • F16B37/00—Nuts or like thread-engaging members
    • F16B37/04—Devices for fastening nuts to surfaces, e.g. sheets, plates

Definitions

  • the present invention relates to a blind bolt.
  • the present invention relates to a blind bolt that can be stably fastened with high bonding strength.
  • Blind bolts comprising a bolt member having an external thread and a sleeve having an internal thread screwing on the bolt member are well known.
  • the blind bolt rotates the bolt inserted into the sleeve from one side, and applies a compressive force to the tip of the sleeve protruding to the other side by screwing the male screw of the bolt member into the female screw of the sleeve to rotate the sleeve. Expand diameter and fasten.
  • the blind bolt can be fastened by work from one side of the fastening member.
  • the crimping force force to clamp the member
  • the member is fastened with sufficient crimping force.
  • the part that provides the axial force is a bolt
  • the crimping force applied to the member by the buckling sleeve decreases to 50% to 60% of the output (axial force) of the bolt.
  • the bonding strength is significantly reduced due to the decrease in the pressure bonding force.
  • Patent Document 1 discloses a one-side bolt (blind bolt) including a sleeve, a bolt, and a nut.
  • the sleeve of the one side bolt has a flange and a tubular portion.
  • the flange is formed with a tapered receiving hole and a pressing surface.
  • the opening of the receiving hole extends so that the head of the bolt does not enter when the flange is tapered but when the flange is deformed into a flat shape.
  • the bolt is screwed in, a bulge is formed in the cylindrical portion of the sleeve, and then the flange becomes flat and the axial force applied to the bolt is released.
  • the bolt can be further rotated and a large axial force can be introduced to the bolt.
  • the one-side bolt of Patent Document 1 can firmly clamp the joining member with a large clamping force.
  • the fastening state can be confirmed by the close contact of the head of the bolt to the flat flange. With a small number of parts, a strong axial force necessary for fastening can be obtained, and confirmation of fastening completion can be easily made.
  • the one-side bolt of Patent Document 1 sandwiches the coupling member between the flange of the sleeve and the bulge, it can not be removed once it is fastened.
  • the members are joined by the frictional force due to the axial force between the flange of the sleeve and the bulge, and sufficient joint strength can not be obtained.
  • the head of the bolt is pressed against the flange of the sleeve to deform the flange from a tapered shape to a flat shape, if the dimensional accuracy of the flange is poor, the flange may be deformed abnormally.
  • Patent Document 2 discloses a fastening device including a cylindrical main body (sleeve), a jaw formed at one end of the cylindrical main body, and a bolt.
  • the cylindrical main body has an engaging portion at one end, a low rigidity portion at the middle, and a female screw at the other end.
  • the jaws non-rotatably engage with the tubular body. Also, the outer periphery of the jaws is a hexagonal locking stopper.
  • the jaws When the substrate (attachment member) and the panel (attachment member) are fastened, the jaws are engaged with one end of the cylindrical main body, the bolt is inserted and screwed, and the low rigidity portion of the cylindrical main body is outside Bulging to form an enlarged part, and sandwiching the substrate and the panel between the enlarged part and the jaw part and fastening.
  • the fastening of the substrate and the panel When removing the substrate and the panel, it is possible to release the fastening of the substrate and the panel by loosening the bolt by reverse rotation and pulling out the jaws from the cylindrical main body.
  • Patent document 2 can fasten a board
  • the jaws since the jaws are separated, it is possible to release the fastening between the substrate and the panel as required.
  • Bolts and jaws can be reused, and resources can be saved.
  • the members are crimped only by the axial force, and the crimping force for crimping the substrate is lower than the axial force, and a sufficient bonding strength can not be obtained.
  • Patent Document 3 discloses a blind rivet consisting of a mandrel and a rivet.
  • the mandrel has a large diameter head at one end.
  • the rivet has a rivet body closed at one end and a flange extending radially outward from the other end of the rivet body.
  • the rivet places the head of the mandrel on the closed end side and accommodates the mandrel in a non-extractable manner.
  • the rivet body has a tapered portion whose outer diameter gradually decreases from the side of the flange toward one end.
  • Patent Document 3 requires a dedicated fastening tool to pull out and fasten the mandrel.
  • the coupling member is sandwiched between the flange of the rivet body and the enlarged diameter portion, it can not be removed once it is fastened.
  • patent document 3 aims at obtaining high water tightness by a wide contact area, and does not obtain high joint strength.
  • the blind bolt of the present invention comprises five parts: a bolt, a washer, an outer nut, an enlarged diameter sleeve and an inner nut.
  • the diameter-expanding sleeve is expanded in the mounting hole of the member, and the member is supported by bearing connection.
  • the diameter-expanding sleeve portion extending from the mounting hole of the member is expanded in diameter, and the member is held between the outer nut and the enlarged-diameter portion of the diameter-expanding sleeve to support the member by friction bonding.
  • the bonding of the present invention is a bonding in which the bearing bonding and the friction bonding are combined. Therefore, the bonding strength can be made higher than the bonding only by friction bonding.
  • a first aspect of the present invention is a blind bolt, wherein A bolt having a large diameter head, a cylindrical portion adjacent to the head, and an externally threaded portion adjacent to the cylindrical portion; A washer having an inner diameter larger than the outer diameter of the cylindrical portion of the bolt; An outer nut having a first end face perpendicular to the central axis, a second end face opposite to the first end face, and an outer nut hole through which the cylindrical portion of the bolt passes; The inner nut end portion that can be inserted into the outer nut hole of the outer nut, the cylindrical inner nut cylindrical portion adjacent to the inner nut end portion, and the inner nut stepped portion are larger than the inner nut cylindrical portion An inner nut head having a diameter, an inner nut hole into which the cylindrical portion of the bolt can be inserted, and an inner nut formed in the inner nut hole and having an internal thread portion screwed with the external thread portion of the bolt An enlarged diameter sleeve having a circular cross section, in which the inner nut end portion and an
  • the blind bolt comprises five parts of a bolt, a washer, an outer nut, an enlarged diameter sleeve and an inner nut, these parts can be combined to easily form the blind bolt.
  • the enlarged diameter sleeve has a first end portion having a constant outer diameter and an inner diameter, a first curved portion adjacent to the first end portion and thinner than the first end portion, and the first curved portion.
  • a second curved portion adjacent to the first curved portion and thicker than the first curved portion, and adjacent to the second curved portion, having a constant outer diameter and an inner diameter, and a second end thicker than the second curved portion It is preferable to have
  • the enlarged diameter sleeve When the enlarged diameter sleeve has a first curved portion and a second curved portion thicker than the first curved portion, the first thickness reduced first when an axial compression force is applied to the expanded diameter sleeve.
  • the curved portion bulges radially outward, and then the thick second curved portion expands in diameter.
  • the first curved portion of the enlarged diameter sleeve is adjacent to the first inclined portion whose outer diameter and inner diameter gradually increase toward the second end, and is constant in outer diameter and inner diameter.
  • the second curved portion of the enlarged diameter sleeve is adjacent to the third inclined portion whose outer diameter and inner diameter gradually increase toward the second end, and is constant in outer diameter and inner diameter. It is preferable to have a second cylindrical portion and a fourth inclined portion adjacent to the second cylindrical portion and having an outer diameter and an inner diameter gradually decreasing.
  • the central portion of the first curved portion can be expanded outward.
  • the second curved portion of the enlarged diameter sleeve has a third inclined portion, a second cylindrical portion, and a fourth inclined portion, the central portion of the second curved portion can be expanded outward.
  • the inner nut end portion of the inner nut is disposed in the outer nut hole of the outer nut
  • the enlarged diameter sleeve is disposed around a portion of the inner nut end portion and around the inner nut cylindrical portion between the second end face of the outer nut and the inner nut step portion of the inner nut.
  • the washer is disposed around the cylindrical portion of the bolt between the head of the bolt and the first end surface of the outer nut.
  • the cylindrical portion of the bolt is disposed in the outer nut hole of the outer nut and in the inner nut hole of the inner nut.
  • the male screw portion of the bolt is preferably assembled by screwing with the female screw portion of the inner nut.
  • the blind bolt is inserted into the mounting holes of the mounting member and the mounting member and fastened. You can do it.
  • the enlarged diameter sleeve is disposed between the second end face of the outer nut and the inner nut step portion, the diameter can be increased by applying a force that compresses the diameter enlarged sleeve in the axial direction.
  • the inner nut is rotationally fixed to the outer nut.
  • the blind bolt can be fastened simply by fixing the outer nut so as not to rotate and simply screwing in the bolt.
  • the outer nut hole of the outer nut has a circular hole and a polygonal hole
  • the inner nut end portion of the inner nut has a plurality of end portion flat portions extending in the axial direction and a plurality of end portion cylindrical portions between the adjacent end portion flat portions; It is preferable to fit in the square hole.
  • the outer nut hole of the outer nut has a polygonal hole
  • the inner nut end portion has a plurality of end portion flat portions and a plurality of end portion cylindrical portions
  • the inner nut end portion has a plurality of outer nut portions.
  • the first end of the enlarged sleeve is joined to the outer nut, and the second end of the enlarged sleeve is joined to the inner nut.
  • a second aspect of the present invention is a fastening structure in which a mounting member in which a mounting hole is formed and a mounting member are fastened with a blind bolt, A bolt having a large diameter head, a cylindrical portion adjacent to the head, and an externally threaded portion adjacent to the cylindrical portion; A washer disposed about the cylindrical portion adjacent to the head of the bolt; An outer nut having a first end face, a second end face opposite to the first end face, and an outer nut hole through which the cylindrical portion of the bolt passes; The inner nut end portion inserted into the outer nut hole of the outer nut, the cylindrical inner nut cylindrical portion adjacent to the inner nut end portion, and the inner nut stepped portion are larger than the inner nut cylindrical portion An inner nut having an inner nut head of a diameter, an inner nut hole, and a female screw formed in the inner nut hole; An enlarged diameter sleeve hole is formed and has a circular cross section; The diameter expansion sleeve is disposed around the inner nut cylindrical portion
  • the cylindrical portion of the bolt is inserted into the inner nut hole of the inner nut, and the male screw portion of the bolt is screwed into the female screw portion of the inner nut hole.
  • the diameter-expanding sleeve in the mounting member and the mounting hole of the mounting member expand in diameter and abut on the inner surface of the mounting hole,
  • the enlarged diameter sleeve outside the mounting hole forms an enlarged diameter portion with an outer diameter larger than the inner diameter of the mounting hole,
  • the fastening structure is characterized in that the mounting member and the mounting member are sandwiched and fastened between the second end face of the outer nut and the enlarged diameter portion of the enlarged diameter sleeve.
  • the mounting member and the mounting member When the diameter-expanding sleeve in the mounting member and the mounting hole of the mounting member is expanded in diameter and is in contact with the inner surface of the mounting hole, the mounting member and the mounting member are supported by pressure.
  • the enlarged diameter sleeve outside the mounting hole forms an enlarged diameter portion whose outer diameter is larger than the inner diameter of the mounting hole, and between the second end face of the outer nut and the enlarged diameter portion of the diameter enlarged sleeve.
  • a second enlarged diameter portion having an outer diameter different from that of the enlarged diameter portion is formed adjacent to the enlarged diameter portion of the enlarged diameter sleeve.
  • the mounting member and the mounting member can be more strongly coupled.
  • a third aspect of the present invention is an inner nut which is a component of a blind bolt for fastening a mounting member and a mounting member, An inner nut end portion having a plurality of axially extending end portion flat portions and a plurality of end portion cylindrical portions between the adjacent end portion flat portions; A cylindrical inner nut cylindrical portion adjacent to the end portion of the inner nut; An inner nut head larger in diameter than the inner nut cylindrical portion; An inner nut hole formed in the central axis direction, And a female screw formed in a part of the inner nut hole.
  • the inner nut end portion of the inner nut has a plurality of end portion flat portions and a plurality of end portion cylindrical portions
  • the inner nut end portion is engaged with the polygonal hole of the outer nut hole to form the inner nut and the outer
  • the nut can be locked.
  • the inner nut has an inner nut cylindrical portion and an inner nut head larger in diameter than the inner nut cylindrical portion
  • the second end of the diameter-expanding sleeve is located between the inner nut cylindrical portion and the inner nut head It can be supported by the inner nut step.
  • the inner nut has an inner nut hole and a female screw formed in a part of the inner nut hole, the male screw of the bolt can be screwed in to expand the diameter-expanding sleeve.
  • a fourth aspect of the present invention is an enlarged diameter sleeve which is a component of a blind bolt for fastening a mounting member and a mounting member, A first end with constant outer and inner diameters, A first curved portion adjacent to the first end and thinner than the first end; A second curved portion adjacent to the first curved portion and thicker than the first curved portion; An enlarged diameter sleeve adjacent to the second curved portion, having a second end with a constant outer diameter and an inner diameter, and a thicker wall thickness than the second curved portion.
  • the enlarged diameter sleeve When the enlarged diameter sleeve has a first curved portion and a second curved portion thicker than the first curved portion, the first thickness reduced first when a force for axially compressing the expanded diameter sleeve is applied.
  • the first curved portion bulges radially outward, and then the thick second curved portion expands in diameter.
  • the first curved portion of the enlarged diameter sleeve is adjacent to the first inclined portion whose outer diameter and inner diameter gradually increase toward the second end, and is constant in outer diameter and inner diameter.
  • the second curved portion of the enlarged diameter sleeve is adjacent to the third inclined portion whose outer diameter and inner diameter gradually increase toward the second end, and is constant in outer diameter and inner diameter. It is preferable to have a second cylindrical portion and a fourth inclined portion adjacent to the second cylindrical portion and having an outer diameter and an inner diameter gradually decreasing.
  • FIG. 5 is a cross-sectional view of the washer of FIG. 4 taken along the line AA. It is the front view which made a part of outer nut of the blind bolt of FIG. 1 the cross section. It is a left view of the outer nut of FIG. It is a perspective view of the diameter-increased sleeve of the blind bolt of FIG. It is the front view which made a part of the diameter-expanding sleeve of FIG. 8 the cross section.
  • FIG. 1 is an exploded perspective view of the blind bolt 1 of the embodiment.
  • the blind bolt 1 according to the embodiment of the present invention includes a bolt 10, a washer 20, an outer nut 30, an enlarged diameter sleeve 40, and an inner nut 50.
  • Each component constituting the blind bolt 1 according to the embodiment of the present invention will be described in order with reference to FIGS.
  • FIG. 2 is a front view of the bolt 10, and FIG. 3 is a left side view.
  • the bolt 10 has a head 11 having a hexagonal cross section at one end.
  • the bolt 10 has a cylindrical portion 13 adjacent to the head 11.
  • the tip of the cylindrical portion 13 is a cylindrical male screw 15 up to the tip.
  • the male screw portion 15 has a male screw on the outer peripheral surface, and the outer diameter of the thread of the male screw portion 15 is the same as the outer diameter of the cylindrical portion 13.
  • the bolt 10 is made of metal such as steel or stainless steel. The bolt 10 can use a commercially available thing.
  • the washer 20 used for the blind bolt 1 of the embodiment of the present invention will be described with reference to FIGS.
  • the washer 20 has a short cylindrical shape and has an axially perpendicular first washer end face 21 and a second washer end face 22.
  • the first and second washer end faces 21 and 22 are flat.
  • a central hole 23 having a circular cross section is formed in the axial direction.
  • the outer diameter of the cylindrical portion 13 of the bolt 10 is equal to or slightly smaller than the inner diameter of the central hole 23 of the washer 20, and the cylindrical portion 13 of the bolt 10 can be inserted into the central hole 23 of the washer 20.
  • the portion following the first washer end face 21 to the central hole 23 is chamfered to form a tapered surface 24.
  • the washer 20 may not be necessary.
  • FIG. 6 is a front view in which a part of the outer nut 30 used for the blind bolt 1 according to the embodiment of the present invention is sectioned, and FIG. 7 is a left side view.
  • the cross section of the outer surface 31 of the outer nut 30 is hexagonal, and the ridges between the faces are chamfered.
  • the outer surface 31 of the outer nut 30 may have another angular number such as quadrilateral.
  • the outer surface 31 of the outer nut 30 may have a shape that can be fixed with a spanner or the like.
  • One end of the outer nut 30 is a first end surface 35, and an outer nut hole is formed in the axial direction from the first end surface 35.
  • a first end face 35 side of the outer nut hole is a circular hole 32 having a circular cross section.
  • the inner diameter of the circular hole 32 is larger than the outer diameter of the cylindrical portion 13 of the bolt 10, and the cylindrical portion 13 of the bolt 10 and the male screw portion 15 can pass through the circular hole 32.
  • a polygonal hole 33 having a hexagonal cross section Adjacent to the circular hole 32, a polygonal hole 33 having a hexagonal cross section is formed up to the second end face 36 which is the other end face. The distance between the opposing apexes of the polygon holes 33 is smaller than the inner diameter of the circular holes 22.
  • a step 34 perpendicular to the axial direction is formed between the circular hole 32 and the polygonal hole 33. The steps 34 are circular on the outside and hexagonal on the inside.
  • An end face on the side of the polygonal hole 33 of the outer nut 30 is a second end face 36.
  • the second end face 36 has a circular outer shape.
  • the shape of the second end face 36 is a shape that can be formed by forging, and may not be circular.
  • the outer nut 30 is made of a metal such as high hardness steel or stainless steel. In one embodiment, the steel is quenched and tempered and the Rockwell hardness is 35-45 HRC.
  • the inner nut end portion of the inner nut 50 is used instead of the polygonal hole 33. It can be a circular hole to enter.
  • FIG. 8 is a perspective view of the enlarged diameter sleeve 40.
  • FIG. 9 is a front view of a part of the enlarged diameter sleeve 40 as a cross section.
  • 10 is an enlarged view of part B of FIG. 9, and
  • FIG. 11 is an enlarged view of part A. As shown in FIG.
  • the enlarged diameter sleeve 40 is a generally cylindrical member.
  • the cross section of the enlarged diameter sleeve 40 is circular on both the outer surface and the inner surface.
  • the outer diameter of the enlarged diameter sleeve 40 is larger than the distance between the tops of the polygonal holes 33 of the outer nut 30.
  • An enlarged sleeve bore is formed through the enlarged sleeve 40, the inner diameter of which is approximately equal to the distance between the apexes of the polygonal bore 33 of the outer nut 30.
  • the diameter-expanding sleeve 40 is axially pressurized by the outer nut 30 and the inner nut 50, and is buckled and diameter-expanded, so it is made of steel that has low hardness and is easily deformed. In one embodiment, it is made of steel that has not been heat treated after heading and has a Vickers hardness of 36 to 39 Hv.
  • the enlarged diameter sleeve 40 has a first curved portion and a second curved portion.
  • the first curved portion is expanded in diameter inside the mounting member 70 and the mounting holes 72 and 73 of the mounting member 71 and abuts on the inner surface of the mounting holes 72 and 73 to support the mounting member 70 and the mounting member 71 Join.
  • the second curved portion is expanded in diameter outside the mounting holes 72 and 73, presses the surface of the mounting member 70, and frictionally bonds the mounting member 70 and the mounting member 71.
  • the first curved portion has a first inclined portion 42 of the enlarged diameter sleeve 40, a first cylindrical portion 43, and a second inclined portion 44.
  • the second curved portion has a third inclined portion 46, a second cylindrical portion 47, and a fourth inclined portion 48.
  • the boundary between the first curve and the second curve is not critical.
  • One end of the enlarged diameter sleeve 40 is a first end 41, and the outer diameter thereof is the maximum outer diameter D E of the enlarged diameter sleeve 40, and the inner diameter thereof is the minimum inner diameter d e of the enlarged diameter sleeve 40.
  • a first groove 42m is formed on the outer periphery adjacent to the first end 41. From the portion of the first groove 42m, a first inclined portion 42 whose inner diameter and outer diameter gradually increase, and a first cylindrical portion 43 having a constant inner diameter and outer diameter continue. The outer diameter of the first cylindrical portion 43 is D E and the inner diameter is larger than d e .
  • the enlarged diameter sleeve 40 continues with the second inclined portion 44 and the second groove 44m in which the inner diameter and the outer diameter gradually decrease, and the middle portion 45 having the same inner diameter and the outer diameter as the first end 41.
  • the length from the first end 41 to the middle 45 is approximately equal to the sum of the thicknesses of the mounting member 70 and the mounting member 71.
  • the inner diameters of the mounting members 72 and 73 of the mounting member 70 and the mounting member 71 are slightly larger than the maximum outer diameter D E of the enlarged diameter sleeve 40.
  • the first curved portion (the first inclined portion 42, the first cylindrical portion 43, and the second inclined portion 44) of the enlarged diameter sleeve 40 is a mounting hole 72 of the mounting member 70 and the mounting member 71. , 73 and expand in diameter in the mounting holes 72, 73 to apply bearing pressure to the inner surfaces of the mounting holes 72, 73.
  • the first inclined portion 42, the first cylindrical portion 43, and the second inclined portion 44 are described as being linear, respectively, the first inclined portion 42 and the second inclined portion 44 may be curved.
  • a third groove 46m is formed on the outer periphery, and from the portion of the third groove 46m, a third inclined portion 46 whose inner diameter and outer diameter gradually increase, and a second cylindrical portion having a constant inner diameter and outer diameter Continue with 47.
  • the outer diameter of the second cylindrical portion 47 is D E and the inner diameter is larger than d e .
  • the fourth inclined portion 48 with the inner diameter and the outer diameter gradually decreasing, the fourth groove 48m, and the second end 49 having the same inner diameter and the outer diameter as the first end 41 are continued.
  • the plate thickness of the second cylindrical portion 47 is larger than the plate thickness of the first cylindrical portion 43.
  • the second cylindrical portion 47 is a portion that is more difficult to expand in diameter than the first cylindrical portion 43 and is an enlarged portion outside the mounting hole 72 of the mounting member 70.
  • the third inclined portion 46 and the fourth inclined portion 48 are provided on the lateral side of the second cylindrical portion 47, and the second cylindrical portion 47 has an inner diameter and an outer diameter that are large. When pressure is applied, the second cylindrical portion 47 tends to expand in diameter.
  • the third inclined portion 46, the second cylindrical portion 47, and the fourth inclined portion 48 are described as being linear, respectively, the third inclined portion 46 and the fourth inclined portion 48 may be curved.
  • the first curved portion and the second curved portion both bulge outward at the central portion. Since the first curved portion is thinner than the second curved portion, the first curved portion is more likely to be deformed. Therefore, when the blind bolt 1 is tightened, the first curved portion first expands in the mounting holes 72 and 73 when a force that axially compresses the diameter expanding sleeve 40 is applied. Close contact with the inside. Next, the second curved portion expands in diameter outside the mounting holes 72 and 73 to press the surface of the mounting member, and the mounting member 70 and the mounting member 71 are friction-joined.
  • FIG. 10 is an enlarged view of a portion B of FIG.
  • the third groove 46m of the B portion is located in the vicinity of the mounting member 72 attached to the mounting hole 72, and when the blind nut is fastened, the diameter-expanding sleeve 40 expands in diameter from the third inclined portion 46, and the mounting member
  • the mounting member 70 and the mounting member 71 are frictionally bonded by being pressed at the position of the surface 70.
  • FIG. 11 is an enlarged view of a portion A of FIG.
  • the fourth groove 48m of the A portion is shallower than the third groove 46m of the B portion.
  • the third groove 46m in the portion B close to the surface of the mounting member 70 is first deformed so as to be in close contact with the surface of the mounting member 70.
  • FIG. 12 is a front view of a part of the inner nut 50 in cross section.
  • FIG. 13 is a left side view of the inner nut 50.
  • the inner nut 50 is a cylindrical member as a whole, and the inner nut hole 52 is formed inside.
  • the left end side of the inner nut 50 is an end portion of the inner nut.
  • Six circumferential portions of the end portion of the inner nut are chamfered to form an axially long end portion flat portion 54.
  • the inner nut cylindrical portion 53 extends between adjacent end portion flat portions 54 to form an end portion cylindrical portion 53a.
  • the end portion cylindrical portion 53 a of the inner nut end portion and the end portion flat portion 54 fit in the polygonal hole 33 of the outer nut 30. That is, the distance between the facing flat portions 54 is equal to or slightly smaller than the distance between the facing sides of the polygonal hole 33 of the outer nut 30.
  • the method of locking the inner nut 50 against the outer nut 30 is not limited to this.
  • the outer nut 30 can also be joined to the first end 41 of the sleeve 40 and the inner nut 50 to the second end 49 of the expansion sleeve 40.
  • the method of joining includes welding, brazing and the like, and is not limited. In that case, it is not necessary to form the end portion flat portion 54 at the inner nut end portion.
  • the inner nut end portion may have a shape in which the inner nut cylindrical portion 53 is extended.
  • An axially central portion of the inner nut 50 is a cylindrical inner nut cylindrical portion 53.
  • a portion close to the right end portion of the inner nut 50 is an inner nut head 55 having an outer diameter larger than the inner nut cylindrical portion 53.
  • An inner nut step portion 56 is between the outer surface of the inner nut cylindrical portion 53 and the outer surface of the inner nut head 55.
  • the maximum outer diameter D E of the enlarged diameter sleeve 40 is approximately equal to the outer diameter of the inner nut head 55.
  • the minimum inner diameter d e of the enlarged diameter sleeve 40 is equal to or slightly larger than the outer diameter of the inner nut cylindrical portion 53, and the end portion flat portion 54 of the inner nut end portion and the end portion cylindrical portion It is possible to insert the inner nut cylindrical portion 53 and the portion where 53a alternates.
  • the inner nut step 56 abuts on the second end 49 of the enlarged diameter sleeve 40 and stops.
  • the tip end portion of the inner nut end portion of the inner nut 50 exits from the first end portion 41 of the enlarged diameter sleeve 40. That is, the length from the inner nut step portion 56 to the tip end portion of the inner nut 50 is longer than the central axial direction length of the enlarged diameter sleeve 40.
  • An inner nut hole 52 is formed in the inner nut 50.
  • the inner diameter of the inner nut hole 52 is equal to or slightly larger than the outer diameter of the cylindrical portion 13 of the bolt 10, and the cylindrical portion 13 of the bolt 10 can be inserted into the inner nut hole 52.
  • a female screw portion 57 is formed in the inner nut hole 52 in the portion of the inner nut head 55, and can be screwed with the male screw of the male screw portion 15 of the bolt 10.
  • the inner nut 50 applies pressure in the axial direction to the diameter expansion sleeve 40 to cause buckling and diameter expansion, and therefore, the inner nut 50 is made of steel which is high in hardness and difficult to deform. In one embodiment, it is hardened and tempered and made of steel having a Rockwell hardness of 36 to 39 HRC. Although the cross section of the outer surface of the inner nut head 55 of the inner nut 50 is circular, it may be hexagonal.
  • FIG. 14 is a perspective view of the blind bolt 1 in which the parts are assembled.
  • FIG. 15 is a front view of a portion of the blind bolt 1 as a cross section.
  • FIG. 16 is a left side view of the blind bolt 1.
  • the assembly of the bolt 10, which is a component of the blind bolt 1, the washer 20, the outer nut 30, the enlarged diameter sleeve 40, and the inner nut 50 will be described with reference to FIGS.
  • the washer 20 is set from the side of the male screw 15 of the bolt 10. At this time, the first washer end face 21 of the washer 20 is directed to the head 11 side of the bolt 10.
  • the end portion flat portion 54 of the inner nut 50 is inserted into the enlarged diameter sleeve 40 with the side on which the end portion flat portion 54 is present at the top. At this time, the second end 49 of the enlarged diameter sleeve 40 is brought to the side of the inner nut head 55 of the inner nut 50.
  • the enlarged diameter sleeve 40 and the inner nut 50 are inserted from the side of the second end face 36 of the outer nut 30 with the end portion flat portion 54 of the inner nut 50 at the top.
  • the end portion flat portion 54 and the end portion cylindrical portion 53 a of the inner nut 50 enter the polygonal hole 33 of the outer nut 30 and are detentated.
  • the enlarged diameter sleeve 40 is sandwiched between the second end face 36 of the outer nut 30 and the inner nut step portion 56 of the inner nut 50.
  • the bolt 10 to which the washer 20 is attached is inserted into the inner nut hole 52 of the inner nut 50, and the male screw of the male screw 15 of the bolt 10 is screwed into the female screw of the female screw 57 of the inner nut 50.
  • the washer 20 is sandwiched between the head 11 of the bolt 10 and the first end face 35 of the outer nut 30.
  • the blind bolt 1 shown in FIGS. 14 to 16 is assembled.
  • the end portion flat portion 54 of the inner nut 50 is engaged with the polygonal hole 33 of the outer nut 30, and the outer nut 30 and the inner nut 50 are prevented from rotating with each other.
  • Other methods may be used to prevent the outer nut 30 and the inner nut 50 from rotating relative to each other.
  • the outer nut 30 and the inner nut 50 may be joined to the enlarged diameter sleeve 40 so that they do not rotate relative to each other.
  • FIG. 17 is a front view in which a part of the stage in which the blind bolt 1 is set to the mounting member 70 and the mounting member 71 is taken as a cross section.
  • FIG. 18 is a front view, partly in cross section, of the stage at which the fastening is completed.
  • the right side of FIG. 17 is the blind side, and the left side is the working side.
  • the mounting member 70 is disposed on the blind side, and the mounting member 71 is disposed on the working side, and the blind bolt 1 is attached from the left working side.
  • the mounting hole 72 of the mounting member 70 and the mounting member 71 are superimposed so that the mounting hole 72 of the mounting member 70 and the mounting hole 73 of the mounting member 71 are aligned.
  • the assembled blind bolt 1 is inserted into the mounting hole 72 of the mounting member 70 and the mounting hole 73 of the mounting member 71 from the side of the mounting member 71.
  • the second end face 36 of the outer nut 30 abuts on the surface around the mounting hole 73 of the mounting member 71.
  • the mounting member 70 is a lower plate of a panel or the like of an automobile
  • the mounting member 71 is a member mounted on the mounting member 70.
  • a slight gap is left between the inner surfaces of the mounting members 72 and 73 of the mounting member 71 and the outer surface of the first cylindrical portion 43 of the enlarged diameter sleeve 40.
  • An intermediate portion 45 of the enlarged diameter sleeve 40 is in the axial direction near the surface of the workpiece 70.
  • the first cylindrical portion 43 of the enlarged diameter sleeve 40 is thinner than the second cylindrical portion 47 and is more easily deformed.
  • the diameter-expanding sleeve 40 first, the first cylindrical portion 43 expands in diameter in the mounting holes 72 and 73 of the mounting member 70 and the mounting member 71, and adheres closely to the inner surfaces of the mounting holes 72 and 73.
  • the enlarged diameter sleeve 40 applies bearing pressure to the inner surfaces of the mounting holes 72 and 73.
  • the first cylindrical portion 43 can not further expand in diameter.
  • the third inclined portion 46 having the third groove 46m adjacent to the surface of the mounting member 70 is easily bent, the diameter of the second cylindrical portion 47 is enlarged, and the diameter-expanding portion 47a is adjacent to the surface of the mounting member 70. It is formed.
  • the mounting member 71 and the mounting member 70 are sandwiched between the second end face 36 of the outer nut 30 and the enlarged diameter portion 47 a of the enlarged diameter sleeve 40.
  • the enlarged diameter sleeve 40 presses the surface of the mounting member 70, and the mounting member 70 and the mounting member 71 are friction-joined.
  • the enlarged diameter portion 47a is sufficiently expanded in diameter and can not be expanded further, so the thick second end
  • the diameter 49 is enlarged to form a second enlarged diameter portion 49a.
  • a higher bonding strength can be obtained by the second enlarged diameter portion 49a.
  • the enlarged diameter sleeve 40 exerts a further strong frictional force between the mounting member 70 and the mounting member 71. Now, as shown in FIG. 18, the fastening of the blind bolt 1 is completed.
  • the enlarged diameter sleeve 40 has a first curved portion and a second curved portion thicker than the first curved portion.
  • the second curved portion thicker than the first curved portion expands in diameter, and is adjacent to the surface of the mounting member 70.
  • the enlarged diameter portion 47 a is formed, and the mounting member 70 and the mounting member 71 are sandwiched between the second end surface 36 of the outer nut 30 and the enlarged diameter portion 47 a. Thereby, friction bonding can be obtained.
  • the mounting member 71 and the mounting member 70 can be coupled with strong bonding strength.
  • the thick second end 49 of the diameter-expanding sleeve 40 is diameter-expanded to form a second diameter-expanding portion 49a, and a higher bonding strength is obtained.
  • the bonding of the embodiment of the present invention is a combination of friction bonding and bearing bonding, and higher bonding strength can be obtained than in the case of friction bonding alone.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Dowels (AREA)

Abstract

L'invention concerne un boulon aveugle qui peut être serré selon une force d'assemblage élevée et qui est facile à desserrer à l'aide d'outils disponibles dans le commerce. Ce boulon aveugle qui permet de serrer un élément de fixation (71) où sont formés des trous de fixation (72, 73) et un élément cible de fixation (70) comprend : un boulon (10) à section de tête (11) de grand diamètre, une section cylindrique (13) adjacente à la section de tête et une section de filetage mâle (15) ; une rondelle (20) ; un écrou externe (30) présentant une première surface d'extrémité (35), une seconde surface d'extrémité (36) et un trou d'écrou externe ; un manchon de diamètre étendu (40) à première section incurvée, dont une partie centrale fait saillie vers l'extérieur, et à seconde section incurvée, qui est plus épaisse que la première section incurvée et dont une section centrale fait saillie vers l'extérieur ; et un écrou interne (50) à section d'extrémité d'écrou interne, qui peut être insérée dans le trou d'écrou externe de l'écrou externe, à section de cylindre d'écrou interne cylindrique (53), à section de tête d'écrou interne (55), de diamètre plus grand que la partie de cylindre, à trou d'écrou interne (52), dans lequel peut être insérée la section cylindrique du boulon, et à section de filetage femelle (57), qui est vissée grâce à la section de filetage mâle du boulon.
PCT/JP2018/039738 2017-10-27 2018-10-25 Boulon aveugle Ceased WO2019082984A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2017-208007 2017-10-27
JP2017208007A JP7010429B2 (ja) 2017-10-27 2017-10-27 ブラインドボルト

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WO2019082984A1 true WO2019082984A1 (fr) 2019-05-02

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WO (1) WO2019082984A1 (fr)

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Publication number Priority date Publication date Assignee Title
CN213929079U (zh) * 2020-09-21 2021-08-10 漳州昊恒建材有限公司 高稳定性螺栓连接组件
KR102301181B1 (ko) * 2021-01-26 2021-09-10 삼우엠씨피 주식회사 팝 너트
KR102721035B1 (ko) * 2021-11-05 2024-10-23 (주)글로벌엔지니어링 홀 클램프 체결 유닛

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59127911U (ja) * 1983-02-17 1984-08-28 岩田ボ−ルト工業株式会社 グロメツト
JPH0552324U (ja) * 1991-12-19 1993-07-13 昭和電線電纜株式会社 弾性ゴムナット
JP2009103311A (ja) * 2009-01-30 2009-05-14 Pem Management Inc クリンチ形ブラインドナット
JP2014530327A (ja) * 2011-09-15 2014-11-17 ニューフレイリミテッド ライアビリティカンパニー ブラインドリベット及び被加工物構成
JP2016133148A (ja) * 2015-01-16 2016-07-25 株式会社ＮｅｊｉＬａｗ 締結構造
JP2016142315A (ja) * 2015-01-30 2016-08-08 三菱日立パワーシステムズ株式会社 ボルト抜け止め構造
WO2017098016A1 (fr) * 2015-12-09 2017-06-15 Bossard Ag Élément de fixation
JP2017120096A (ja) * 2015-12-28 2017-07-06 ポップリベット・ファスナー株式会社 締結具及び締結構造

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59127911U (ja) * 1983-02-17 1984-08-28 岩田ボ−ルト工業株式会社 グロメツト
JPH0552324U (ja) * 1991-12-19 1993-07-13 昭和電線電纜株式会社 弾性ゴムナット
JP2009103311A (ja) * 2009-01-30 2009-05-14 Pem Management Inc クリンチ形ブラインドナット
JP2014530327A (ja) * 2011-09-15 2014-11-17 ニューフレイリミテッド ライアビリティカンパニー ブラインドリベット及び被加工物構成
JP2016133148A (ja) * 2015-01-16 2016-07-25 株式会社ＮｅｊｉＬａｗ 締結構造
JP2016142315A (ja) * 2015-01-30 2016-08-08 三菱日立パワーシステムズ株式会社 ボルト抜け止め構造
WO2017098016A1 (fr) * 2015-12-09 2017-06-15 Bossard Ag Élément de fixation
JP2017120096A (ja) * 2015-12-28 2017-07-06 ポップリベット・ファスナー株式会社 締結具及び締結構造

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