WO2019082984A1 - Blind bolt - Google Patents

Blind bolt

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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
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WO
WIPO (PCT)
Prior art keywords
nut
diameter
inner nut
bolt
hole
Prior art date
Application number
PCT/JP2018/039738
Other languages
French (fr)
Japanese (ja)
Inventor
牧野　敬範
隆司 山口
Original Assignee
ニューフレイ リミテッド ライアビリティ カンパニー
公立大学法人大阪市立大学
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 ニューフレイ リミテッド ライアビリティ カンパニー, 公立大学法人大阪市立大学 filed Critical ニューフレイ リミテッド ライアビリティ カンパニー
Publication of WO2019082984A1 publication Critical patent/WO2019082984A1/en

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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.

Abstract

Provided is a blind bolt which can be fastened with a high joining strength and easily unfastened by using commercially available tools. This blind bolt for fastening an attachment member (71) having attachment holes (72, 73) formed therein and an attachment target member (70) is provided with: a bolt (10) having a head section (11) having a large diameter, a cylindrical section (13) adjacent to the head section, and a male thread section (15); a washer (20); an outer nut (30) having a first end surface (35), a second end surface (36), and an outer nut hole; an expanded-diameter sleeve (40) having a first curved section, which has a central portion that bulges outward, and a second curved section, which is thicker than the first curved section and has a central section that bulges outward; and an inner nut (50) having an inner nut end section which can be inserted into the outer nut hole of the outer nut, a cylindrical inner nut cylinder section (53), an inner nut head section (55) having a larger diameter than the cylinder part, an inner nut hole (52) into which the cylindrical section of the bolt can be inserted, and a female thread section (57) that is screwed with the male thread section of the bolt.

Description

ブラインドボルトBlind bolt
　本発明は、ブラインドボルトに関する。特に、安定して高い接合強度で締結することが出来るブラインドボルトに関する。 The present invention relates to a blind bolt. In particular, the present invention relates to a blind bolt that can be stably fastened with high bonding strength.
　雄ねじを有するボルト部材と、ボルト部材に螺合する雌ねじを有するスリーブとを備えるブラインドボルトは、よく知られている。ブラインドボルトは、スリーブ内に挿通したボルトを一方の側から回転して、ボルト部材の雄ねじをスリーブの雌ねじにねじ込むことにより、他方の側に突出したスリーブの先端に圧縮力を与えて、スリーブを拡径して締結する。ブラインドボルトは、締結する部材の一方の側からの作業で締結することができる。 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.
　しかし、従来のブラインドボルトは、ボルト又はマンドレルに十分な軸力を与えても、部材への圧着力（部材を挟み込む力）は、軸力より低くなり、部材を十分な圧着力で締結することができない。軸力を与える部品がボルトの場合、座屈させるスリーブが部材に与える圧着力は、ボルトの出力（軸力）の50％～60％に低下してしまう。摩擦接合することを考えると、圧着力の低下により接合強度が著しく低下する。 However, even if the conventional blind bolt applies sufficient axial force to the bolt or the mandrel, the crimping force (force to clamp the member) to the member is lower than the axial force, and the member is fastened with sufficient crimping force. I can not If 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. In view of friction bonding, the bonding strength is significantly reduced due to the decrease in the pressure bonding force.
　特許文献１は、スリーブと、ボルトと、ナットと備えるワンサイドボルト（ブラインドボルト）を開示する。ワンサイドボルトのスリーブは、フランジと、筒状部とを有する。フランジには、テーパ状に広がる受孔と押圧面とが形成されている。受孔の開口部は、フランジがテーパ状のときは、ボルトの頭部が入らないが、フラット状に変形したときには、ボルトの頭部が入るように広がる。ボルトをねじ込むと、スリーブの筒状部にはバルジが形成され、その後、フランジがフラットになって、ボルトにかかる軸力が解放される。ボルトの頭部が受孔に入ると、ボルトを更に回転させることができ、ボルトに大きな軸力を導入することができる。 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. When the flange is tapered, 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. When 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. When the head of the bolt enters the receiving hole, the bolt can be further rotated and a large axial force can be introduced to the bolt.
　特許文献１のワンサイドボルトは、大きなクランプ力で接合部材を強固に締付けることができる。また、フラットになったフランジにボルトの頭部が密着していることにより締結状態を確認することができる。少ない部品点数で、締結に必要な強い軸力を得ることができ、締結完了の確認も容易にできる。 The one-side bolt of Patent Document 1 can firmly clamp the joining member with a large clamping force. In addition, 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.
　しかし、特許文献１のワンサイドボルトは、スリーブのフランジと、バルジの間に結合部材を挟むので、いったん締結すると取り外すことはできない。スリーブのフランジと、バルジの間の軸力による摩擦力で部材を接合するものであり、十分な接合強度を得ることはできない。
　また、スリーブのフランジに、ボルトの頭部を押し付けて、フランジをテーパ状からフラット状に変形させるので、フランジの寸法精度が悪いと、フランジが異常変形するおそれがある。 However, since 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.
Further, since 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.
　特許文献２は、筒状本体（スリーブ）と、筒状本体の一端部に形成された顎部と、ボルトとを備える締結装置を開示する。筒状本体は、一端部の係合部と、中間部の低剛性部と、他端部の雌ネジとを有する。顎部は、筒状本体に対して回転不能に係合する。また、顎部の外周は、六角形の周り止め係止部である。
　基板（被取付部材）とパネル（取付部材）を締結する場合は、筒状本体の一端部に顎部を係合させ、ボルトを挿入して螺合させ、筒状本体の低剛性部を外側に膨出させて、膨大部を形成し、膨大部と顎部とで基板とパネルを挟んで締結する。
　基板とパネルを取り外す場合は、ボルトを逆回転させて緩め、筒状本体から顎部を引き抜くことにより、基板とパネルの締結を解除することができる。 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.
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.
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.
　特許文献２は、専用工具を用いることなく、基板とパネルをボルトの螺合操作により簡単迅速に締結することができる。また、顎部が別体になっているので、必要に応じて基板とパネルの締結を解除することができる。ボルト、顎部は再使用することができ、省資源化を図ることができる。 Patent document 2 can fasten a board | substrate and a panel simply and rapidly by screwing operation of a bolt, without using an exclusive tool. In addition, 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.
　しかし、特許文献２の締結装置は、前述したように軸力のみにより部材を圧着するもので、基板を圧着する圧着力は軸力より低下して、十分な接合強度を得ることはできない。 However, in the fastening device of Patent Document 2, as described above, 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.
　特許文献３は、マンドレルと、リベットからなるブラインドリベットを開示する。マンドレルは、一端部に径の大きな頭部を有する。リベットは、一端部が閉じられたリベット本体と、リベット本体の他端から径方向外側に拡がるフランジと、を有する。リベットは、マンドレルの頭部を閉じられた一端側に位置させて、マンドレルを抜き出し不能に収容する。リベット本体は、フランジの側から一端部に向かうに伴い外径が徐々に小さくなるテーパ部を有する。 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.
　板材のリベット用孔にブラインドリベットを挿入して、マンドレルを引き抜くと、圧縮されたリベット本体の板材から突出する部分が径方向に拡がり、拡径部分を形成する。拡径部分と、フランジとの間に板材が挟まれる。テーパ部は、リベット用孔の内面側に押し付けられて内面と密着する。この広い密着面積により、高い水密性を得ることができる。 When a blind rivet is inserted into the rivet hole of the plate and the mandrel is pulled out, the portion of the compressed rivet body projecting from the plate expands in the radial direction to form an enlarged diameter portion. The plate material is sandwiched between the enlarged diameter portion and the flange. The tapered portion is pressed against the inner surface side of the rivet hole to be in close contact with the inner surface. High water tightness can be obtained by this wide contact area.
　特許文献３のブラインドリベットは、マンドレルを引き抜いて締結するのに、専用の締結工具が必要である。また、リベット本体のフランジと、拡径部分との間に結合部材を挟むので、いったん締結すると取り外すことはできない。また、特許文献３は、広い密着面積により高い水密性を得ることを目的とし、高い接合強度を得るものではない。 The blind rivet of Patent Document 3 requires a dedicated fastening tool to pull out and fasten the mandrel. In addition, since 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. Moreover, patent document 3 aims at obtaining high water tightness by a wide contact area, and does not obtain high joint strength.
　そのため、締結装置を使用せずに市販の工具を用いて、強い接合強度で部材を締結することができるブラインボルトが求められていた。 Therefore, there has been a demand for a brine bolt which can fasten a member with strong bonding strength using a commercially available tool without using a fastening device.
特開２０１１－２２６６２５号公報JP 2011-226625 A 登録実用新案３０３００７４号公報Registered utility model 3030074 特開２０１２－１４５１６７号公報JP 2012-145167 A
　従って、本発明の目的は、高い接合強度で締結することができ、容易に取り外すことが出来るブラインドボルトを提供することである。 Accordingly, it is an object of the present invention to provide a blind bolt that can be fastened with high joint strength and can be easily removed.
　この目的を達成するため、本発明のブラインドボルトは、ボルトと、ワッシャと、アウターナットと、拡径スリーブと、インナーナットとの５部品を備える。ブラインドボルトを締結するとき、まず、拡径スリーブが部材の取付孔内で拡径し、支圧接合で部材を支持する。次に、部材の取付孔から出ている拡径スリーブの部分が拡径し、アウターナットと、拡径スリーブの拡径部との間に部材を挟みこみ、摩擦接合により部材を支持する。
　即ち、本発明の接合は、支圧接合と摩擦接合とが合わさった接合となる。そのため、摩擦接合だけの接合より接合強度を高くすることができる。 In order to achieve this object, 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. When fastening the blind bolt, first, the diameter-expanding sleeve is expanded in the mounting hole of the member, and the member is supported by bearing connection. Next, 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.
That is, 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.
　本発明の第１の態様は、ブラインドボルトであって、
　大径の頭部と、前記頭部に隣接する円柱部と、前記円柱部に隣接する雄ねじ部とを有するボルトと、
　前記ボルトの前記円柱部の外径より大きい内径を有するワッシャと、
　中心軸に垂直な第１端面と、前記第１端面と反対側の第２端面と、前記ボルトの前記円柱部が通るアウターナット孔とを有するアウターナットと、
　前記アウターナットの前記アウターナット孔に挿入できるインナーナット端部分と、前記インナーナット端部分に隣接する円筒形のインナーナット円筒部と、インナーナット段部を境にして、前記インナーナット円筒部より大径のインナーナット頭部と、前記ボルトの前記円柱部を挿入できるインナーナット孔と、前記インナーナット孔に形成され、前記ボルトの前記雄ねじ部と螺合する雌ねじ部とを有するインナーナットと、
　前記インナーナット端部分と、前記インナーナット円筒部を挿入できる拡径スリーブ孔が形成された断面が円形の拡径スリーブと、
を備えることを特徴とするブラインドボルトである。 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 enlarged diameter sleeve hole into which the inner nut cylindrical portion can be inserted are formed;
It is a blind bolt characterized by providing.
　ブラインドボルトが、ボルトと、ワッシャと、アウターナットと、拡径スリーブと、インナーナットとの５部品を備えると、これらの部品を組み合わせて、容易にブラインドボルトを形成することが出来る。 When 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.
　前記拡径スリーブは、外径と内径が一定の第１端部と、前記第１端部に隣接し、前記第１端部より肉厚が薄い第１湾曲部と、前記第１湾曲部に隣接し、前記第１湾曲部より肉厚が厚い第２湾曲部と、前記第２湾曲部に隣接し、外径と内径が一定で、前記第２湾曲部より肉厚が厚い第２端部とを有することが好ましい。 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
　拡径スリーブが、第１湾曲部と、第１湾曲部より肉厚が厚い第２湾曲部を有すると、拡径スリーブに軸方向に圧縮する力をかけるとき、最初に肉厚の薄い第１湾曲部が半径方向外側に膨らみ、次に肉厚の厚い第２湾曲部が拡径する。 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.
　前記拡径スリーブの前記第１湾曲部は、前記第２端部に向かって、外径と内径が次第に大きくなる第１傾斜部と、前記第１傾斜部に隣接し、外径と内径が一定の第１円筒部と、前記第１円筒部に隣接し、外径と内径が次第に小さくなる第２傾斜部とを有し、
　前記拡径スリーブの前記第２湾曲部は、前記第２端部に向かって、外径と内径が次第に大きくなる第３傾斜部と、前記第３傾斜部に隣接し、外径と内径が一定の第２円筒部と、前記第２円筒部に隣接し、外径と内径が次第に小さくなる第４傾斜部とを有することが好ましい。 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. A second inclined portion adjacent to the first cylindrical portion, the outer diameter and the inner diameter gradually decreasing,
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.
　拡径スリーブの第１湾曲部が、第１傾斜部と、第１円筒部と、第２傾斜部とを有すると、第１湾曲部は、中央部が外側に膨らんだ形とすることが出来る。
　拡径スリーブの第２湾曲部が、第３傾斜部と、第２円筒部と、第４傾斜部とを有すると、第２湾曲部は、中央部が外側に膨らんだ形とすることが出来る。 When the first curved portion of the enlarged diameter sleeve has the first inclined portion, the first cylindrical portion, and the second inclined portion, the central portion of the first curved portion can be expanded outward. .
When 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. .
　前記インナーナットの前記インナーナット端部分は、前記アウターナットの前記アウターナット孔内に配置され、
　前記拡径スリーブは、前記アウターナットの前記第２端面と、前記インナーナットの前記インナーナット段部との間で、前記インナーナット端部分の一部の周りと前記インナーナット円筒部の周りに配置され、
　前記ワッシャは、前記ボルトの前記頭部と、前記アウターナットの前記第１端面の間で、前記ボルトの前記円柱部の周りに配置され、
　前記ボルトの前記円柱部は、前記アウターナットの前記アウターナット孔内と前記インナーナットの前記インナーナット孔内に配置され、
　前記ボルトの前記雄ねじ部は、前記インナーナットの前記雌ねじ部と螺合して、組立てられていることが好ましい。 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. And
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.
　ボルトと、ワッシャと、アウターナットと、拡径スリーブと、インナーナットとの５部品がブラインドボルトとして組み立てられていると、被取付部材と取付部材の取付孔に、ブラインドボルトを挿入して、締結することが出来る。
　拡径スリーブが、アウターナットの第２端面と、インナーナット段部との間に配置されていると、拡径スリーブを軸方向に圧縮する力をかけて、拡径させることができる。 When the five parts of the bolt, the washer, the outer nut, the enlarged diameter sleeve, and the inner nut are assembled as a blind bolt, the blind bolt is inserted into the mounting holes of the mounting member and the mounting member and fastened. You can do it.
When 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.
　前記インナーナットは前記アウターナットに対して回り止めされていることが好ましい。 It is preferable that the inner nut is rotationally fixed to the outer nut.
　インナーナットがアウターナットに対して回り止めされていると、アウターナットが回らないように固定して、ボルトをねじ込むだけで、ブラインドボルトを締結することが出来る。 When the inner nut is locked against 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.
　前記アウターナットの前記アウターナット孔は、円形孔と多角形孔とを有し、
　前記インナーナットの前記インナーナット端部分は、軸方向に延びる複数の端部分平面部と、隣接する前記端部分平面部の間の複数の端部分円筒部とを有し、前記アウターナットの前記多角形孔に適合していることが好ましい。 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.
　アウターナットのアウターナット孔が、多角形孔を有し、インナーナット端部分が、複数の端部分平面部と、複数の端部分円筒部とを有し、インナーナット端部分が、アウターナットの多角形孔に適合すると、インナーナットはアウターナットに対して回り止めされる。 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, and the inner nut end portion has a plurality of outer nut portions. When fitted in the square hole, the inner nut is locked against the outer nut.
　前記拡径スリーブの前記第１端部は、前記アウターナットに接合され、前記拡径スリーブの前記第２端部は、前記インナーナットに接合されていることが好ましい。 Preferably, 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.
　アウターナットと、インナーナットとが、拡径スリーブに溶接等により接合されていると、容易に回り止めすることが出来る。 When the outer nut and the inner nut are joined to the enlarged diameter sleeve by welding or the like, they can be easily prevented from rotating.
　本発明の第２の態様は、　取付孔が形成された取付部材と被取付部材をブラインドボルトで締結した締結構造であって、
　大径の頭部と、前記頭部に隣接する円柱部と、前記円柱部に隣接する雄ねじ部とを有するボルトと、
　前記ボルトの前記頭部に隣接して前記円柱部の周りに配置されたワッシャと、
　第１端面と、前記第１端面と反対側の第２端面と、前記ボルトの前記円柱部が通っているアウターナット孔とを有するアウターナットと、
　前記アウターナットの前記アウターナット孔に挿入されたインナーナット端部分と、前記インナーナット端部分に隣接する円筒形のインナーナット円筒部と、インナーナット段部を境として、前記インナーナット円筒部より大径のインナーナット頭部と、インナーナット孔と、前記インナーナット孔に形成された雌ねじ部とを有するインナーナットと、
　拡径スリーブ孔が形成され、断面が円形の拡径スリーブと、を備え、
　前記拡径スリーブは、前記アウターナットの前記第２端面と、前記インナーナットの前記インナーナット段部との間で、前記インナーナットの前記インナーナット円筒部の周りに配置され、
　前記ボルトの前記円柱部は、前記インナーナットの前記インナーナット孔に挿入され、前記ボルトの前記雄ねじ部は、前記インナーナット孔の前記雌ねじ部に螺合し、
　前記取付部材と前記被取付部材の前記取付孔内の前記拡径スリーブは、拡径して前記取付孔の内面に当接し、
　前記取付孔の外の前記拡径スリーブは、前記取付孔の内径より大きい外径の拡径部を形成し、　
　前記アウターナットの第２端面と、前記拡径スリーブの前記拡径部との間に、前記取付部材と前記被取付部材とが挟まれて締結されていることを特徴とする締結構造である。 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 of the inner nut between the second end surface of the outer nut and the inner nut step portion of the inner nut.
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.
　取付部材と被取付部材の取付孔内の拡径スリーブは、拡径して取付孔の内面に当接していると、取付部材と被取付部材は、支圧接合される。
　取付孔の外の拡径スリーブは、取付孔の内径より大きい外径の拡径部を形成し、アウターナットの第２端面と、拡径スリーブの拡径部との間に、取付部材と被取付部材とが挟まれて締結されると、取付部材と被取付部材は、摩擦接合により、強力に固定することが出来る。 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 When the mounting member is sandwiched and fastened, the mounting member and the mounting member can be strongly fixed by friction bonding.
　前記拡径スリーブの前記拡径部に隣接して、前記拡径部と異なる外径の第２拡径部が形成されていることが好ましい。 Preferably, 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.
　拡径スリーブの拡径部に隣接して、第２拡径部が形成されていると、更に強力に取付部材と被取付部材を結合することが出来る。 When the second 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.
　本発明の第３の態様は、取付部材と被取付部材を締結するためのブラインドボルトの構成部品であるインナーナットであって、
　軸方向に延びる複数の端部分平面部と、隣接する前記端部分平面部の間の複数の端部分円筒部とを有するインナーナット端部分と、
　前記インナーナット端部分に隣接する円筒形のインナーナット円筒部と、
　前記インナーナット円筒部より大径のインナーナット頭部と、
　中心軸方向に形成されたインナーナット孔と、
　前記インナーナット孔の一部に形成された雌ねじ部と、を有するインナーナットである。 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.
　インナーナットのインナーナット端部分が、複数の端部分平面部と、複数の端部分円筒部とを有すると、インナーナット端部分をアウターナット孔の多角形孔に係合させて、インナーナットとアウターナットを回り止めすることが出来る。
　インナーナットが、インナーナット円筒部と、インナーナット円筒部より大径のインナーナット頭部とを有すると、拡径スリーブの第２端部を、インナーナット円筒部とインナーナット頭部との間のインナーナット段部により支持することが出来る。　
　インナーナットが、インナーナット孔と、インナーナット孔の一部に形成された雌ねじ部とを有すると、ボルトの雄ねじ部をねじ込んで、拡径スリーブを拡径させることが出来る。 When 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.
When 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.
When 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.
　本発明の第４の態様は、取付部材と被取付部材を締結するためのブラインドボルトの構成部品である拡径スリーブであって、
　外径と内径が一定の第１端部と、
　前記第１端部に隣接し、前記第１端部より肉厚が薄い第１湾曲部と、
　前記第１湾曲部に隣接し、前記第１湾曲部より肉厚が厚い第２湾曲部と、
　前記第２湾曲部に隣接し、外径と内径が一定で、前記第２湾曲部より肉厚が厚い第２端部とを有する拡径スリーブである。 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.
　拡径スリーブが、第１湾曲部と、第１湾曲部より肉厚が厚い第２湾曲部とを有すると、拡径スリーブに軸方向に圧縮する力をかけるとき、最初に肉厚の薄い第１湾曲部が半径方向外側に膨らみ、次に肉厚の厚い第２湾曲部が拡径する。 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.
　前記拡径スリーブの前記第１湾曲部は、前記第２端部に向かって、外径と内径が次第に大きくなる第１傾斜部と、前記第１傾斜部に隣接し、外径と内径が一定の第１円筒部と、前記第１円筒部に隣接し、外径と内径が次第に小さくなる第２傾斜部とを有し、
　前記拡径スリーブの前記第２湾曲部は、前記第２端部に向かって、外径と内径が次第に大きくなる第３傾斜部と、前記第３傾斜部に隣接し、外径と内径が一定の第２円筒部と、前記第２円筒部に隣接し、外径と内径が次第に小さくなる第４傾斜部とを有することが好ましい。 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. A second inclined portion adjacent to the first cylindrical portion, the outer diameter and the inner diameter gradually decreasing,
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.
　本発明によれば、締結工具を用いず市販の工具を用いて、高い接合強度で容易に締結することができ、容易に取り外すことが出来るブラインドボルトを提供することが出来る。 According to the present invention, it is possible to provide a blind bolt which can be easily fastened with high bonding strength and easily removed using a commercially available tool without using a fastening tool.
本発明の実施形態のブラインドボルトの部品の分解斜視図である。It is an exploded perspective view of parts of a blind bolt of an embodiment of the present invention. 図１のブラインドボルトのボルトの正面図である。It is a front view of the bolt of the blind bolt of FIG. 図２のボルトの左側面図である。It is a left view of the bolt of FIG. 図１のブラインドボルトのワッシャの左側面図である。It is a left view of the washer of the blind bolt of FIG. 図４のワッシャのＡ－Ａ線に沿った断面図である。FIG. 5 is a cross-sectional view of the washer of FIG. 4 taken along the line AA. 図１のブラインドボルトのアウターナットの一部を断面とした正面図である。It is the front view which made a part of outer nut of the blind bolt of FIG. 1 the cross section. 図６のアウターナットの左側面図である。It is a left view of the outer nut of FIG. 図１のブラインドボルトの拡径スリーブの斜視図である。It is a perspective view of the diameter-increased sleeve of the blind bolt of FIG. 図８の拡径スリーブの一部を断面とした正面図である。It is the front view which made a part of the diameter-expanding sleeve of FIG. 8 the cross section. 図９の拡径スリーブのＢ部分の拡大図である。It is an enlarged view of B part of the diameter-expanding sleeve of FIG. 図９の拡径スリーブのＡ部分の拡大図である。It is an enlarged view of A part of the diameter-expanding sleeve of FIG. 図１のブラインドボルトのインナーナットの一部を断面とした正面図である。It is the front view which made a part of inner nut of the blind bolt of FIG. 1 the cross section. 図１２のインナーナットの左側面図である。It is a left view of the inner nut of FIG. 図１の部品を組み立てたブラインドボルトの斜視図である。It is a perspective view of the blind bolt which assembled the parts of FIG. 図１４のブラインドボルトの一部を断面とした正面図である。It is the front view which made a part of blind bolt of FIG. 14 the cross section. 図１４のブラインドボルトの左側面図である。It is a left view of the blind bolt of FIG. 図１４のブラインドボルトを取付部材と被取付部材にセットした状態の一部を断面とした正面図である。It is the front view which made a part of the state which set the blind bolt of FIG. 14 to the attachment member and the to-be-attached member a cross section. 図１４のブラインドボルトを取付部材と被取付部材に締結した段階の一部を断面とした正面図である。It is the front view which made the cross section a part of the stage which fastened the blind bolt of FIG. 14 to a mounting member and a mounting member.
　以下、図面を参照して、本発明の実施形態によるブラインドボルトについて説明する。図１は、実施形態のブラインドボルト1の分解斜視図である。本発明の実施形態のブラインドボルト1は、ボルト10と、ワッシャ20と、アウターナット30と、拡径スリーブ40と、インナーナット50と、を備える。
　図２～１３を参照して、本発明の実施形態のブラインドボルト1を構成する各部品について順に説明する。 Hereinafter, a blind bolt according to an embodiment of the present invention will be described with reference to the drawings. 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.
（ボルト）
　図２はボルト10の正面図、図３は左側面図である。ボルト10は、一端部に断面が六角形の頭部11を有する。ボルト10は、頭部11に隣接して、円柱形の円柱部13を有する。円柱部13の先は先端部まで、円柱形の雄ねじ部15となっている。雄ねじ部15は外周面に雄ねじを有し、雄ねじ部15のねじ山の外径は、円柱部13の外径と同じである。
　ボルト10は、鋼、ステンレス等の金属でできている。ボルト10は、市販のものを使用することが出来る。 (bolt)
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.
（ワッシャ）
　図４、５を参照して、本発明の実施形態のブラインドボルト1に使用するワッシャ20について説明する。ワッシャ20は、短い円筒形であり、軸方向に垂直な第１ワッシャ端面21と、第２ワッシャ端面22とを有する。第１、第２ワッシャ端面21,22は平面である。軸方向に断面が円形の中心孔23が形成されている。
　ボルト10の円柱部13の外径は、ワッシャ20の中心孔23の内径と等しいか、少し小さく、ボルト10の円柱部13は、ワッシャ20の中心孔23に挿入することが出来る。第１ワッシャ端面21から中心孔23に続く部分は面取りされて、テーパ面24となっている。
　ワッシャ20は、なくてもよい。 (Washer)
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.
（アウターナット）
　図６は、本発明の実施形態のブラインドボルト1に使用するアウターナット30の一部を断面にした正面図、図７は左側面図である。
　アウターナット30の外面31の断面は、六角形であり、面と面の間の稜線部は面取りされている。アウターナット30の外面31は、４角形等他の角数とすることもできる。アウターナット30の外面31は、スパナ等で固定することができる形状であれば良い。 (Outer nut)
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.
　アウターナット30の一方の端部は、第１端面35であり、第１端面35から軸方向にアウターナット孔が形成されている。アウターナット孔の第１端面35側は、断面が円形の円形孔32である。円形孔32の内径は、ボルト10の円柱形の円柱部13の外径より大きく、円形孔32にボルト10の円柱部13と雄ねじ部15を通すことが出来る。 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.
　円形孔32に隣接して、他方の端面である第２端面36まで、断面が六角形の多角形孔33が形成されている。多角形孔33の対向する頂点間の距離は、円形孔22の内径より小さい。
　円形孔32と多角形孔33の間は、軸方向に直角の段部34となっている。段部34は、外側が円形、内側が六角形である。 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.
　アウターナット30の多角形孔33の側の端面は、第２端面36である。第２端面36は、外形が円形となっている。この第２端面36の形状は、圧造により出来る形状であり、円形となっていなくてもよい。
　アウターナット30は、硬度の高い鋼、ステンレス等の金属でできている。一実施例では、鋼を焼入れ焼き戻しして、ロックウェル硬度は、35～45HRCである。 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.
　後述するように、回り止めのため、アウターナット30とインナーナット50とを、拡径スリーブ40に溶接等により接合する場合は、多角形孔33の代わりに、インナーナット50のインナーナット端部分が入る円形孔とすることが出来る。 As described later, when the outer nut 30 and the inner nut 50 are joined to the enlarged diameter sleeve 40 by welding or the like for preventing rotation, 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.
（拡径スリーブ）
　図８～１１を参照して、本発明の実施形態のブラインドボルト1に使用する拡径スリーブ40について説明する。図８は、拡径スリーブ40の斜視図である。図９は拡径スリーブ40の一部を断面とした正面図である。図１０は図９のＢ部分の拡大図、図１１はＡ部分の拡大図である。 (Expansion sleeve)
With reference to FIGS. 8-11, the enlarged diameter sleeve 40 used for the blind bolt 1 of the embodiment of the present invention will be described. 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.
　拡径スリーブ40は、全体として円筒形の部材である。拡径スリーブ40の断面は、外面、内面とも円形である。拡径スリーブ40の外径は、アウターナット30の多角形孔33の頂点間の距離より大きい。拡径スリーブ40を貫通する拡径スリーブ孔が形成され、その内径は、アウターナット30の多角形孔33の頂点間の距離とほぼ等しい。
　拡径スリーブ40は、アウターナット30とインナーナット50により、軸方向に圧力をかけられ、座屈して拡径するので、硬度が低く変形しやすい鋼で出来ている。１実施例では、圧造後熱処理していない鋼で出来ていて、ビッカース硬度36～39Hvである。 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.
　拡径スリーブ40は、第１湾曲部と、第２湾曲部とを有する。第１湾曲部は、被取付部材70と取付部材71の取付孔72,73の内部で拡径し、取付孔72,73の内面に当接し、被取付部材70と取付部材71とを支圧接合する。第２湾曲部は、取付孔72,73の外部で拡径し、被取付部材70の表面を押圧して、被取付部材70と取付部材71とを摩擦接合する。
　第１湾曲部は、拡径スリーブ40の第１傾斜部42と、第１円筒部43と、第２傾斜部44とを有する。第２湾曲部は、第３傾斜部46と、第２円筒部47と、第４傾斜部48とを有する。第１湾曲部と第２湾曲部の境界は厳密なものではない。 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.
　拡径スリーブ40の一方の端部は、第１端部41であり、その外径は拡径スリーブ40の最大外径ＤE、内径は拡径スリーブ40の最小内径ｄeである。第１端部41に隣接して、外周に第１溝42mが形成されている。第１溝42mの部分から、内径、外径が次第に大きくなる第１傾斜部42、内径、外径が一定の第１円筒部43と続く。第１円筒部43の外径はＤEであり、内径はｄeより大きい。 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 .
　更に、拡径スリーブ40は、内径、外径が次第に小さくなる第２傾斜部44、第２溝44m、内径、外径が第１端部41と同じ中間部45と続く。
　第１端部41から中間部45までの長さは、被取付部材70と取付部材71の厚さの和にほぼ等しい。
　被取付部材70と取付部材71の取付孔72,73の内径は、拡径スリーブ40の最大外径ＤEより少し大きい。ブラインドボルト1を締結するとき、拡径スリーブ40の第１湾曲部（第１傾斜部42、第１円筒部43、第２傾斜部44）は、被取付部材70、取付部材71の取付孔72,73の中に入り、取付孔72,73の中で拡径し、取付孔72,73の内面に支圧力をかける。
　第１傾斜部42、第１円筒部43、第２傾斜部44は、それぞれ直線状として説明したが、第１傾斜部42と、第２傾斜部44は、曲線状でもよい。 Further, 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. When the blind bolt 1 is fastened, 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.
Although 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.
　中間部45に続いて、外周に第３溝46mが形成され、第３溝46mの部分から、内径、外径が次第に大きくなる第３傾斜部46、内径、外径が一定の第２円筒部47と続く。第２円筒部47の外径はＤEであり、内径はｄeより大きい。
　更に、内径、外径が次第に小さくなる第４傾斜部48、第４溝48m、内径、外径が第１端部41と同じ第２端部49と続く。 Next to the intermediate portion 45, 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 .
Furthermore, 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.
　第２円筒部47の板厚は、第１円筒部43の板厚より厚くなっている。第２円筒部47は、第１円筒部43より拡径しにくく、被取付部材70の取付孔72の外で拡径する部分である。
　第２円筒部47の横側には、第３傾斜部46と第４傾斜部48があり、第２円筒部47は内径、外径が大きくなっているので、拡径スリーブ40が軸方向に圧力をかけられると、第２円筒部47は、拡径しやすい。
　第３傾斜部46、第２円筒部47、第４傾斜部48は、それぞれ直線状として説明したが、第３傾斜部46と、第４傾斜部48は、曲線状でもよい。 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.
Although 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.
　第１湾曲部と第２湾曲部は共に中央部で外側に膨らむ。第１湾曲部は、第２湾曲部より板厚が薄いので、第１湾曲部の方が変形しやすい。そのため、ブラインドボルト1を締結するときに、拡径スリーブ40に軸方向に圧縮する力がかかると、まず第１湾曲部が取付孔72,73の中で拡径し、取付孔72,73の内面に密着する。次に、第２湾曲部が取付孔72,73の外で拡径して、被取付部材の表面を押え、被取付部材70と取付部材71は摩擦接合される。 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.
　図１０は図９のＢ部分の拡大図である。Ｂ部分の第３溝46mは、被取付部材70の取付孔72から出た付近に位置し、ブラインドナットを締結するとき、拡径スリーブ40が第３傾斜部46から拡径し、被取付部材70の表面の位置で押さえられ、被取付部材70と取付部材71が摩擦接合されるようになっている。 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.
　図１１は図９のＡ部分の拡大図である。Ａ部分の第４溝48mは、Ｂ部分の第３溝46mと比較して、浅くなっている。被取付部材70の表面に近いＢ部分の第３溝46mがまず変形して、被取付部材70の表面に密着するようになっている。 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.
（インナーナット）
　図１２、１３を参照して、本発明の実施形態のブラインドボルト1に使用するインナーナット50について説明する。図１２は、インナーナット50の一部を断面とした正面図である。図１３は、インナーナット50の左側面図である。
　インナーナット50は、全体として円筒形の部材であり、内側はインナーナット孔52となっている。 (Inner nut)
The inner nut 50 used for the blind bolt 1 of the embodiment of the present invention will be described with reference to FIGS. 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. As shown in FIG.
The inner nut 50 is a cylindrical member as a whole, and the inner nut hole 52 is formed inside.
　インナーナット50の左端部側は、インナーナット端部分である。インナーナット端部分の円周方向の６ヶ所は、面取りされて軸方向に長い端部分平面部54となっている。隣接する端部分平面部54の間は、インナーナット円筒部53が延びて、端部分円筒部53aとなっている。インナーナット端部分の端部分円筒部53aと端部分平面部54は、アウターナット30の多角形孔33に適合する。即ち、対向する平面部54間の距離は、アウターナット30の多角形孔33の対向する辺間の距離と等しいか、それより少し小さくなっている。インナーナット50のインナーナット端部分を、アウターナット30の多角形孔33に挿入すると、アウターナット30に対して、インナーナット50は回り止めされる。 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. When the inner nut end portion of the inner nut 50 is inserted into the polygonal hole 33 of the outer nut 30, the inner nut 50 is locked against the outer nut 30.
　アウターナット30に対して、インナーナット50を回り止めする方法は、これに限定されない。アウターナット30を拡径スリーブ40の第１端部41に、インナーナット50を拡張スリーブ40の第２端部49に接合することもできる。接合する方法は、溶接、ロー付け等があり、限定されない。その場合は、インナーナット端部分に、端部分平面部54を形成する必要はない。インナーナット端部分は、インナーナット円筒部53を延長した形状でもよい。 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.
　インナーナット50の軸方向中央部は、円筒形のインナーナット円筒部53である。インナーナット50の右端部に近い部分は、インナーナット円筒部53より大きい外径のインナーナット頭部55である。インナーナット円筒部53の外面とインナーナット頭部55の外面の間は、インナーナット段部56である。 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.
　拡径スリーブ40の最大外径ＤEは、インナーナット頭部55の外径とほぼ等しい。拡径スリーブ40の最小内径ｄeは、インナーナット円筒部53の外径と等しいかそれより少し大きく、拡径スリーブ40の内側に、インナーナット端部分の端部分平面部54と端部分円筒部53aが交互にある部分と、インナーナット円筒部53を挿入することができる。
　拡径スリーブ40の内側に、インナーナット50を挿入していくと、インナーナット段部56が、拡径スリーブ40の第２端部49に当接して止まる。このとき、インナーナット50のインナーナット端部分（端部分平面部54と端部分円筒部53aが交互にある部分）の先端部は、拡径スリーブ40の第１端部41から出る。即ち、インナーナット50のインナーナット段部56から先端部までの長さは、拡径スリーブ40の中心軸方向長さより長い。　 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.
As the inner nut 50 is inserted inside the enlarged diameter sleeve 40, the inner nut step 56 abuts on the second end 49 of the enlarged diameter sleeve 40 and stops. At this time, the tip end portion of the inner nut end portion of the inner nut 50 (the portion in which the end portion flat portion 54 and the end portion cylindrical portion 53 a alternate) 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.
　インナーナット50には、インナーナット孔52が形成されている。インナーナット孔52の内径は、ボルト10の円柱部13の外径と等しいかそれより少し大きく、インナーナット孔52にボルト10の円柱部13を挿入することができる。
　インナーナット頭部55の部分のインナーナット孔52には、雌ねじ部57が形成され、ボルト10の雄ねじ部15の雄ねじと螺合することが出来る。 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.
　インナーナット50は、拡径スリーブ40に軸方向に圧力をかけ、座屈させて拡径させるので、硬度が高く変形しにくい鋼で出来ている。１実施例では、焼入れ焼き戻しし、ロックウェル硬さ36～39HRCの鋼で出来ている。
　インナーナット50のインナーナット頭部55の外面の断面は円形としたが、六角形でもよい。 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.
（組み立てたブラインドボルト）
　図１４は、部品を組み立てたブラインドボルト1の斜視図である。図１５は、ブラインドボルト1の一部を断面とした正面図である。図１６は、ブラインドボルト1の左側面図である。
　図１４～１６を参照して、ブラインドボルト1の構成部品であるボルト10と、ワッシャ20と、アウターナット30と、拡径スリーブ40と、インナーナット50との組立てについて説明する。 (Assembled blind bolt)
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.
　ボルト10の雄ねじ部15の側から、ワッシャ20をセットする。このとき、ワッシャ20の第１ワッシャ端面21が、ボルト10の頭部11側に向くようにする。
　インナーナット50の端部分平面部54がある側を先頭にして、拡径スリーブ40に挿入する。このとき、拡径スリーブ40の第２端部49がインナーナット50のインナーナット頭部55の側にくるようにする。 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.
　拡径スリーブ40とインナーナット50を、インナーナット50の端部分平面部54を先頭にしてアウターナット30の第２端面36の側から挿入する。インナーナット50の端部分平面部54と端部分円筒部53aは、アウターナット30の多角形孔33に入り、回り止めされる。拡径スリーブ40は、アウターナット30の第２端面36と、インナーナット50のインナーナット段部56の間に挟まれる。 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.
　ワッシャ20を取り付けたボルト10をインナーナット50のインナーナット孔52に挿入し、ボルト10の雄ねじ部15の雄ねじをインナーナット50の雌ねじ部57の雌ねじに螺合させる。ワッシャ20は、ボルト10の頭部11と、アウターナット30の第１端面35との間に挟まれる。これで、図１４～１６に示すブラインドボルト1を組み立てた状態となる。 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. Thus, the blind bolt 1 shown in FIGS. 14 to 16 is assembled.
　アウターナット30の多角形孔33に、インナーナット50の端部分平面部54が係合して、アウターナット30とインナーナット50とは、相互に回転しないように回り止めされている。
　アウターナット30とインナーナット50とが相互に回転しないようにする方法は、これ以外の方法でもよい。アウターナット30と、インナーナット50とを、拡径スリーブ40に接合して相互に回転しないようにすることもできる。 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.
（締結動作）
　図１７、図１８を参照して、組立てたブラインドボルト1により、取付部材71を被取付部材70に取り付ける動作を説明する。図１７は、ブラインドボルト1を被取付部材70と取付部材71にセットした段階の一部を断面とした正面図である。図１８は、締結が完了した段階の一部を断面とした正面図である。
　図１７の右側がブラインド側であり、左側が作業側である。ブラインド側に被取付部材70、作業側に取付部材71を配置し、左側の作業側からブラインドボルト1を取り付ける作業をする。 (Fastening operation)
The operation of attaching the mounting member 71 to the mounting member 70 by the assembled blind bolt 1 will be described with reference to FIGS. 17 and 18. 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.
　被取付部材70の取付孔72と取付部材71の取付孔73の位置が合うように、被取付部材70の取付孔72と取付部材71を重ね合わせる。
　被取付部材70の取付孔72と取付部材71の取付孔73に、組立てたブラインドボルト1を取付部材71の側から挿入する。アウターナット30の第２端面36が、取付部材71の取付孔73の周りの表面に当接する。 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.
　ここに、被取付部材70は、自動車のパネル等の下板であり、取付部材71は被取付部材70に取付ける部材である。
　この状態で、被取付部材70と取付部材71の取付孔72,73の内面と、拡径スリーブ40の第１円筒部43の外面との間は、少し隙間が空いている。
　拡径スリーブ40の中間部45が、軸方向に被取付部材70の表面付近にある。 Here, the mounting member 70 is a lower plate of a panel or the like of an automobile, and the mounting member 71 is a member mounted on the mounting member 70.
In this state, 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.
　アウターナット30の外面31をスパナ等で固定して、ボルト10を回転させて、ボルト10の雄ねじ部15の雄ねじをインナーナット50のインナーナット孔52の雌ねじ部57の雌ねじに更に螺合させていく。インナーナット50の端部分平面部54と端部分円筒部53aは、アウターナット30の多角形孔33に係合している。インナーナット50は、アウターナット30内で回転できない。インナーナット50は回転せず、図１７の左方へ移動していく。 Fix the outer surface 31 of the outer nut 30 with a spanner or the like, rotate the bolt 10, and further screw the male screw of the male screw portion 15 of the bolt 10 to the female screw of the female screw portion 57 of the inner nut hole 52 of the inner nut 50. Go. The end portion flat portion 54 and the end portion cylindrical portion 53 a of the inner nut 50 are engaged with the polygonal hole 33 of the outer nut 30. The inner nut 50 can not rotate within the outer nut 30. The inner nut 50 does not rotate but moves to the left in FIG.
　ワッシャ20と、アウターナット30と、ワッシャ20と、拡径スリーブ40には、ボルト10の頭部11とインナーナット50により、軸方向に圧縮する力がかかる。
　拡径スリーブ40の第１円筒部43は、第２円筒部47より肉厚が薄く、より変形しやすい。拡径スリーブ40は、まず第１円筒部43が、被取付部材70と取付部材71の取付孔72,73内で拡径し、取付孔72,73の内面に密着する。拡径スリーブ40は、取付孔72,73の内面に支圧力をかける。 An axial compression force is applied to the washer 20, the outer nut 30, the washer 20, and the enlarged diameter sleeve 40 by the head 11 of the bolt 10 and the inner nut 50.
The first cylindrical portion 43 of the enlarged diameter sleeve 40 is thinner than the second cylindrical portion 47 and is more easily deformed. In 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.
　拡径スリーブ40に、更に軸方向に圧縮する力がかかると、第１円筒部43はそれ以上拡径できない。被取付部材70の表面に隣接する第３溝46mのある第３傾斜部46が曲がりやすく、第２円筒部47が拡径し、被取付部材70の表面に隣接して、拡径部47aが形成される。
　取付部材71と、被取付部材70とは、アウターナット30の第２端面36と、拡径スリーブ40の拡径部47aとの間に挟まれる。
　拡径スリーブ40は、被取付部材70の表面を押圧し、被取付部材70と取付部材71は摩擦接合される。 When the diameter-expanding sleeve 40 is further axially compressed, 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.
　更に、ボルト10を回転させ、インナーナット頭部55をアウターナット30の方向に引き付けていくと、拡径部47aは十分拡径してそれ以上拡径できないので、肉厚の厚い第２端部49が拡径し、第２拡径部49aが形成される。第２拡径部49aにより、一層高い接合強度を得ることができる。
　拡径スリーブ40は、被取付部材70と取付部材71の間に更に強い摩擦力をかける。
　これで、図１８に示すように、ブラインドボルト1の締結が完了する。 Further, when the bolt 10 is rotated to draw the inner nut head 55 in the direction of the outer nut 30, 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.
（取り外し）
　取付部材71と被取付部材70を取外すには、アウターナット30を回らないように回り止めして、ボルト10を反時計回りに回転させて、インナーナット50からボルト10を取外せば、アウターナット30からインナーナット50を引き抜くことができ、拡径した拡径スリーブ40を取外し、取付部材71を被取付部材70から取り外すことができる。拡径した拡径スリーブ40以外の部品は、再使用することができる。 (removal)
To remove the mounting member 71 and the mounting member 70, turn the outer nut 30 against rotation, turn the bolt 10 counterclockwise, and remove the bolt 10 from the inner nut 50. The inner nut 50 can be pulled out from 30 and the enlarged diameter expansion sleeve 40 can be removed and the mounting member 71 can be removed from the mounting member 70. Parts other than the enlarged diameter expansion sleeve 40 can be reused.
　本発明の実施形態では、拡径スリーブ40は、第１湾曲部と、第１湾曲部より肉厚が厚い第２湾曲部とを有する。ブラインドボルト1を取付部材71と被取付部材70の取付孔72,73に挿入すると、第１湾曲部は取付孔72,73の中に入り、第２湾曲部は取付孔72,73の外に出る。
　ブラインドボルト1を締結するため、拡径スリーブ40を軸方向に圧縮する力がかかると、まず、拡径スリーブ40の第１湾曲部が拡径し、第１円筒部43は取付孔72,73の内面に密着する。これにより、支圧接合を得ることができる。
　次に、更に強い力で拡径スリーブ40を軸方向に圧縮する力がかかると、第１湾曲部より肉厚の厚い第２湾曲部が拡径し、被取付部材70の表面に隣接して拡径部47aが形成され、アウターナット30の第２端面36と拡径部47aとの間に、被取付部材70と取付部材71が挟まれる。これにより、摩擦接合を得ることができる。取付部材71と被取付部材70を強い接合強度で結合することが出来る。 In the embodiment of the present invention, the enlarged diameter sleeve 40 has a first curved portion and a second curved portion thicker than the first curved portion. When the blind bolt 1 is inserted into the mounting members 72 of the mounting member 71 and the mounting member 70, the first curved portion enters the mounting holes 72, 73, and the second curved portion is out of the mounting holes 72, 73. Get out.
When a force is applied to compress the diameter-expanding sleeve 40 in the axial direction in order to fasten the blind bolt 1, first, the first curved portion of the diameter-expanding sleeve 40 expands, and the first cylindrical portion 43 receives the attachment holes 72 and 73. Close to the inner surface of Thereby, bearing joint can be obtained.
Next, when a force that further compresses the diameter-expanding sleeve 40 in the axial direction is applied, 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.
　更に、拡径スリーブ40の肉厚の厚い第２端部49が拡径して、第２拡径部49aを形成し、更に高い接合強度を得ている。これにより、更に強い摩擦接合を得ることができる。
　このように、本発明の実施形態の接合は、摩擦接合と支圧接合が合わさった接合であり、摩擦接合だけの場合より、高い接合強度を得ることができる。 Furthermore, 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. This makes it possible to obtain even stronger friction bonding.
Thus, 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.
1　ブラインドボルト
10　ボルト
11　頭部
13　円柱部
15　雄ねじ部
20　ワッシャ
21　第１ワッシャ端面
22　第２ワッシャ端面
23　中心孔
24　テーパ面
30　アウターナット
31　外面
32　円形孔
33　多角形孔
34　段部
35　第１端面
36　第２端面
40　拡径スリーブ
41　第１端部
42　第１傾斜部
42m　第１溝
43　第１円筒部
44　第２傾斜部
44m　第２溝
45　中間部
46　第３傾斜部
46m　第３溝
47　第２円筒部
47a　拡径部
48　第４傾斜部
48m　第４溝
49　第２端部
49a　第２拡径部
50　インナーナット
52　インナーナット孔
53　インナーナット円筒部
53a　端部分円筒部
54　端部分平面部
55　インナーナット頭部
56　インナーナット段部
57　雌ねじ部
70　被取付部材
71　取付部材
72　取付孔
73　取付孔 1 Blind bolt
10 volts
11 head
13 cylinder
15 Male thread
20 washers
21 1st washer end face
22 Second washer end face
23 central hole
24 taper surface
30 Outer nut
31 Exterior
32 round holes
33 polygon hole
34 steps
35 1st end face
36 2nd end face
40 Expanded sleeve
41 first end
42 first slope
42m first groove
43 1st cylinder part
44 2nd slope
44m second groove
45 Middle part
46 3rd inclined part
46m third groove
47 second cylinder
47a Expanded diameter section
48 4th inclined part
48m fourth groove
49 second end
49a second diameter-increasing section
50 inner nut
52 inner nut hole
53 Inner nut cylindrical part
53a end cylindrical part
54 End part plane part
55 Inner nut head
56 Inner nut step
57 Female thread
70 Mounting member
71 Mounting member
72 Mounting hole
73 Mounting hole

Claims (12)

  1. 　ブラインドボルトであって、
    　大径の頭部と、前記頭部に隣接する円柱部と、前記円柱部に隣接する雄ねじ部とを有するボルトと、
    　前記ボルトの前記円柱部の外径より大きい内径を有するワッシャと、
    　中心軸に垂直な第１端面と、前記第１端面と反対側の第２端面と、前記ボルトの前記円柱部が通るアウターナット孔とを有するアウターナットと、
    　前記アウターナットの前記アウターナット孔に挿入できるインナーナット端部分と、前記インナーナット端部分に隣接する円筒形のインナーナット円筒部と、インナーナット段部を境にして、前記インナーナット円筒部より大径のインナーナット頭部と、前記ボルトの前記円柱部を挿入できるインナーナット孔と、前記インナーナット孔に形成され、前記ボルトの前記雄ねじ部と螺合する雌ねじ部とを有するインナーナットと、
    　前記インナーナット端部分と、前記インナーナット円筒部を挿入できる拡径スリーブ孔が形成された断面が円形の拡径スリーブと、
    を備えることを特徴とするブラインドボルト。     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 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 enlarged diameter sleeve hole into which the inner nut cylindrical portion can be inserted are formed;
    The blind bolt characterized by having.
  2. 　請求項１に記載のブラインドボルトであって、
    　前記拡径スリーブは、外径と内径が一定の第１端部と、前記第１端部に隣接し、前記第１端部より肉厚が薄い第１湾曲部と、前記第１湾曲部に隣接し、前記第１湾曲部より肉厚が厚い第２湾曲部と、前記第２湾曲部に隣接し、外径と内径が一定で、前記第２湾曲部より肉厚が厚い第２端部とを有するブラインドボルト。     The blind bolt according to claim 1, wherein
    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 And blind bolt.
  3. 　請求項２に記載のブラインドボルトであって、
    　前記拡径スリーブの前記第１湾曲部は、前記第２端部に向かって、外径と内径が次第に大きくなる第１傾斜部と、前記第１傾斜部に隣接し、外径と内径が一定の第１円筒部と、前記第１円筒部に隣接し、外径と内径が次第に小さくなる第２傾斜部とを有し、
    　前記拡径スリーブの前記第２湾曲部は、前記第２端部に向かって、外径と内径が次第に大きくなる第３傾斜部と、前記第３傾斜部に隣接し、外径と内径が一定の第２円筒部と、前記第２円筒部に隣接し、外径と内径が次第に小さくなる第４傾斜部とを有するブラインドボルト。     The blind bolt according to claim 2, wherein
    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. A second inclined portion adjacent to the first cylindrical portion, the outer diameter and the inner diameter gradually decreasing,
    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. A blind bolt having 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.
  4. 　請求項１乃至３の何れか１項に記載のブラインドボルトであって、
    　前記インナーナットの前記インナーナット端部分の先端部は、前記アウターナットの前記アウターナット孔内に配置され、
    　前記拡径スリーブは、前記アウターナットの前記第２端面と、前記インナーナットの前記インナーナット段部との間で、前記インナーナット端部分の一部の周りと前記インナーナット円筒部の周りに配置され、
    　前記ワッシャは、前記ボルトの前記頭部と、前記アウターナットの前記第１端面の間で、前記ボルトの前記円柱部の周りに配置され、
    　前記ボルトの前記円柱部は、前記アウターナットの前記アウターナット孔内と前記インナーナットの前記インナーナット孔内に配置され、
    　前記ボルトの前記雄ねじ部は、前記インナーナットの前記雌ねじ部と螺合して、組立てられたブラインドボルト。     The blind bolt according to any one of claims 1 to 3, wherein
    The tip of 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. And
    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 blind bolt assembled by screwing the male screw portion of the bolt with the female screw portion of the inner nut.
  5. 　請求項４に記載のブラインドボルトであって、
    　前記インナーナットは前記アウターナットに対して回り止めされているブラインドボルト。     The blind bolt according to claim 4, wherein
    The blind bolt in which the inner nut is locked against the outer nut.
  6. 　請求項５に記載のブラインドボルトであって、
    　前記アウターナットの前記アウターナット孔は、円形孔と多角形孔とを有し、
    　前記インナーナットの前記インナーナット端部分は、軸方向に延びる複数の端部分平面部と、隣接する前記端部分平面部の間の複数の端部分円筒部とを有し、前記アウターナットの前記多角形孔に適合しているブラインドボルト。     The blind bolt according to claim 5, wherein
    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; Blind bolt that fits into the square hole.
  7. 　請求項１乃至４の何れか１項に記載のブラインドボルトであって、
    　前記拡径スリーブの前記第１端部は、前記アウターナットに接合され、前記拡径スリーブの前記第２端部は、前記インナーナットに接合されているブラインドボルト。     The blind bolt according to any one of claims 1 to 4, wherein
    A blind bolt, wherein 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.
  8. 　取付孔が形成された取付部材と被取付部材をブラインドボルトで締結した締結構造であって、
    　大径の頭部と、前記頭部に隣接する円柱部と、前記円柱部に隣接する雄ねじ部とを有するボルトと、
    　前記ボルトの前記頭部に隣接して前記円柱部の周りに配置されたワッシャと、
    　第１端面と、前記第１端面と反対側の第２端面と、前記ボルトの前記円柱部が通っているアウターナット孔とを有するアウターナットと、
    　前記アウターナットの前記アウターナット孔に挿入されたインナーナット端部分と、前記インナーナット端部分に隣接する円筒形のインナーナット円筒部と、インナーナット段部を境として、前記インナーナット円筒部より大径のインナーナット頭部と、インナーナット孔と、前記インナーナット孔に形成された雌ねじ部とを有するインナーナットと、
    　拡径スリーブ孔が形成され、断面が円形の拡径スリーブと、を備え、
    　前記拡径スリーブは、前記アウターナットの前記第２端面と、前記インナーナットの前記インナーナット段部との間で、前記インナーナットの前記インナーナット円筒部の周りに配置され、
    　前記ボルトの前記円柱部は、前記インナーナットの前記インナーナット孔に挿入され、前記ボルトの前記雄ねじ部は、前記インナーナット孔の前記雌ねじ部に螺合し、
    　前記取付部材と前記被取付部材の前記取付孔内の前記拡径スリーブは、拡径して前記取付孔の内面に当接し、
    　前記取付孔の外の前記拡径スリーブは、前記取付孔の内径より大きい外径の拡径部を形成し、　
    　前記アウターナットの第２端面と、前記拡径スリーブの前記拡径部との間に、前記取付部材と前記被取付部材とが挟まれて締結されていることを特徴とする締結構造。     A fastening structure in which a mounting member in which a mounting hole is formed and a mounting member are fastened by 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 of the inner nut between the second end surface of the outer nut and the inner nut step portion of the inner nut.
    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.
  9. 　請求項８に記載の締結構造であって、
    　前記拡径スリーブの前記拡径部に隣接して、前記拡径部と異なる外径の第２拡径部が形成されている締結構造。     It is the fastening structure of Claim 8, Comprising:
    A fastening structure in which 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.
  10. 　取付部材と被取付部材を締結するためのブラインドボルトの構成部品であるインナーナットであって、
    　軸方向に延びる複数の端部分平面部と、隣接する前記端部分平面部の間の複数の端部分円筒部とを有するインナーナット端部分と、
    　前記インナーナット端部分に隣接する円筒形のインナーナット円筒部と、
    　前記インナーナット円筒部より大径のインナーナット頭部と、
    　中心軸方向に形成されたインナーナット孔と、
    　前記インナーナット孔の一部に形成された雌ねじ部と、を有するインナーナット。     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 an internal thread portion formed in a part of the inner nut hole.
  11. 　取付部材と被取付部材を締結するためのブラインドボルトの構成部品である拡径スリーブであって、
    　外径と内径が一定の第１端部と、
    　前記第１端部に隣接し、前記第１端部より肉厚が薄い第１湾曲部と、
    　前記第１湾曲部に隣接し、前記第１湾曲部より肉厚が厚い第２湾曲部と、
    　前記第２湾曲部に隣接し、外径と内径が一定で、前記第２湾曲部より肉厚が厚い第２端部とを有する拡径スリーブ。     An enlarged diameter sleeve which is a component of a blind bolt for fastening a mounting member and a mounting member, comprising:
    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 having a second end adjacent to the second curved portion, having a constant outer diameter and an inner diameter, and having a thicker thickness than the second curved portion.
  12. 　請求項１１に記載の拡径スリーブであって、
    　前記拡径スリーブの前記第１湾曲部は、前記第２端部に向かって、外径と内径が次第に大きくなる第１傾斜部と、前記第１傾斜部に隣接し、外径と内径が一定の第１円筒部と、前記第１円筒部に隣接し、外径と内径が次第に小さくなる第２傾斜部とを有し、
    　前記拡径スリーブの前記第２湾曲部は、前記第２端部に向かって、外径と内径が次第に大きくなる第３傾斜部と、前記第３傾斜部に隣接し、外径と内径が一定の第２円筒部と、前記第２円筒部に隣接し、外径と内径が次第に小さくなる第４傾斜部とを有する拡径スリーブ。     The enlarged diameter sleeve according to claim 11, wherein
    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. A second inclined portion adjacent to the first cylindrical portion, the outer diameter and the inner diameter gradually decreasing,
    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. And a fourth inclined portion adjacent to the second cylindrical portion and having an outer diameter and an inner diameter gradually decreasing.
PCT/JP2018/039738 2017-10-27 2018-10-25 Blind bolt WO2019082984A1 (en)

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CN213929079U (en) * 2020-09-21 2021-08-10 漳州昊恒建材有限公司 High stability bolt coupling assembling
KR102301181B1 (en) * 2021-01-26 2021-09-10 삼우엠씨피 주식회사 Pop nut

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59127911U (en) * 1983-02-17 1984-08-28 岩田ボ−ルト工業株式会社 grommet
JPH0552324U (en) * 1991-12-19 1993-07-13 昭和電線電纜株式会社 Elastic rubber nut
JP2009103311A (en) * 2009-01-30 2009-05-14 Pem Management Inc Clinch-shaped blind nut
JP2014530327A (en) * 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 Blind rivets and workpiece configuration
JP2016133148A (en) * 2015-01-16 2016-07-25 株式会社ＮｅｊｉＬａｗ Fastening structure
JP2016142315A (en) * 2015-01-30 2016-08-08 三菱日立パワーシステムズ株式会社 Bolt removal structure
WO2017098016A1 (en) * 2015-12-09 2017-06-15 Bossard Ag Fastening element
JP2017120096A (en) * 2015-12-28 2017-07-06 ポップリベット・ファスナー株式会社 Fastener and fastening structure

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59127911U (en) * 1983-02-17 1984-08-28 岩田ボ−ルト工業株式会社 grommet
JPH0552324U (en) * 1991-12-19 1993-07-13 昭和電線電纜株式会社 Elastic rubber nut
JP2009103311A (en) * 2009-01-30 2009-05-14 Pem Management Inc Clinch-shaped blind nut
JP2014530327A (en) * 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 Blind rivets and workpiece configuration
JP2016133148A (en) * 2015-01-16 2016-07-25 株式会社ＮｅｊｉＬａｗ Fastening structure
JP2016142315A (en) * 2015-01-30 2016-08-08 三菱日立パワーシステムズ株式会社 Bolt removal structure
WO2017098016A1 (en) * 2015-12-09 2017-06-15 Bossard Ag Fastening element
JP2017120096A (en) * 2015-12-28 2017-07-06 ポップリベット・ファスナー株式会社 Fastener and fastening structure

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