WO2018221343A1 - Blind bolt - Google Patents

Blind bolt Download PDF

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Publication number
WO2018221343A1
WO2018221343A1 PCT/JP2018/019820 JP2018019820W WO2018221343A1 WO 2018221343 A1 WO2018221343 A1 WO 2018221343A1 JP 2018019820 W JP2018019820 W JP 2018019820W WO 2018221343 A1 WO2018221343 A1 WO 2018221343A1
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WO
WIPO (PCT)
Prior art keywords
bolt
hole
sleeve
nut
shear
Prior art date
Application number
PCT/JP2018/019820
Other languages
French (fr)
Japanese (ja)
Inventor
牧野　敬範
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
ポップリベット・ファスナー株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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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, ポップリベット・ファスナー株式会社 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 WO2018221343A1 publication Critical patent/WO2018221343A1/en

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    • 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
    • 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 fastened stably with a high axial force.
  • the rivet body of the blind rivet has a rivet head at one end and a cylindrical sleeve extending from the rivet head.
  • the mandrel of the blind rivet has a head having a diameter larger than the inner diameter of the sleeve and a shaft portion that can be inserted into the rivet body.
  • the blind rivet has an advantage that a plurality of attached members can be connected by an operation only from one side.
  • blind rivet including a bolt member having a male screw and a rivet member having a female screw screwed to the bolt member.
  • the male screw of the bolt member is screwed into the female screw of the rivet member, so that the diameter of a part of the rivet member is expanded and the attached member is fastened. Since the bolt member is inserted into the rivet member and fastened to the mounting hole of the mounted member, the shear load can be increased.
  • Patent Document 1 discloses a blind bolt including a bolt, a collar, a buckling nut, and a washer.
  • the tubular portion of the buckling nut is buckled and an enlarged diameter portion is formed, and the attached member is a buckling nut. Is sandwiched between the polygonal head and the enlarged diameter portion.
  • the washer is sheared, and the mounting member is sandwiched and fixed between the collar and the mounted member.
  • the blind bolt of Patent Document 1 can be easily attached using a commercially available tool without using a dedicated fastening tool.
  • the operation of tightening the bolt is divided into the step of buckling the tubular part of the buckling nut and attaching it to the attached member, and the step of breaking the washer and attaching the attachment member to the attached member by the collar.
  • the color of the blind bolt of Patent Document 1 is hexagonal on both the outside and the inside, and the polygonal head of the buckling nut is hexagonal on the outside.
  • This blind bolt uses a specially shaped part so that the parts do not rotate relative to each other, and thus has the disadvantage of increasing costs.
  • Patent Document 2 discloses a blind bolt (blind) including a core pin (bolt) having a head on the blind side and a plurality of threads, a nut screwed into a male screw of the core pin, a main sleeve, and an expandable sleeve.
  • Bolt is disclosed.
  • the blind bolt includes a tightening force adjusting structure having a support washer and a shear washer. An axial force is applied to the core pin with a tool to expand the expandable sleeve outward and then shear the shear washer. Thereafter, the core pin is broken at the annular fracture neck groove (breakable portion), the pin tail portion is cut off, and the attachment is completed.
  • the expandable sleeve of the blind bolt of Patent Document 2 is locally annealed and takes a lot of work.
  • a dedicated tool including a socket member and an outer wrench member that can be rotated independently of the socket member is required. Further, since the core pin is broken at the annular fracture neck groove, there is a fear that the breaking load is not constant.
  • an object of the present invention is to provide a blind bolt capable of stably fastening a blind bolt with a high axial force using a commercially available tool without using a fastening tool.
  • Another object of the present invention is to provide a blind bolt in which the nut does not rotate when the bolt is rotated.
  • the blind bolt of the present invention includes six parts including a bolt, a shearing nut, a washer, a shearing sleeve, a diameter expanding sleeve, and a driving nut. These parts are made as simple as possible and have shapes that allow commercial parts to be used. The parts are welded together so that they do not rotate together.
  • a first aspect of the present invention is a blind bolt for fastening an attachment member in which an attachment hole is formed and an attached member in which an attachment hole is formed,
  • a bolt having a large-diameter head, a cylindrical portion adjacent to the head, and a male screw portion adjacent to the cylindrical portion;
  • a first circular hole located on the first end surface of the bolt on the head side, through which the cylindrical portion passes, a first polygonal hole adjacent to the circular hole, and adjacent to the first polygonal hole, the first
  • a shear nut formed with a second polygonal hole located on the second end surface opposite to the end surface;
  • a shearable washer that can be housed inside the shear nut around the cylindrical portion of the bolt;
  • a cylindrical shear sleeve formed with a shear sleeve hole through which the cylindrical portion of the bolt passes;
  • a blind bolt comprising: a drive
  • the blind bolt includes six parts including a bolt, a shearing nut, a washer, a shearing sleeve, a diameter-expanding sleeve, and a drive nut
  • the blind bolt can be easily formed by combining these parts.
  • Parts other than the shearing nut can be manufactured at a low cost with a simple shape.
  • the distance between the opposing faces of the first polygonal hole of the shear nut is larger than the inner diameter of the circular hole, and the distance between the opposing faces of the second polygonal hole is opposite the first polygonal hole. It is preferable that the distance is larger than the distance between the two surfaces.
  • a second step is formed between the second polygon hole and the first polygon hole. I can do it.
  • the outer shape of the washer is preferably adapted to the inner shape of the second polygonal hole of the shear nut.
  • the washer When the outer shape of the washer matches the inner shape of the second polygon hole of the shear nut, the washer can be accommodated in the second polygon hole so as not to rotate.
  • the washer has a first portion and a second portion having an outer shape larger than the first portion;
  • the outer shape of the first portion of the washer is adapted to the inner shape of the first polygonal hole of the shear nut, and the outer shape of the second portion is adapted to the inner shape of the second polygonal hole. preferable.
  • the washer has a first part with a small outer shape and a second part with an outer shape larger than the first part;
  • the step of shearing the washer includes: Only the second part of the washer can be sheared. Therefore, it is suitable when the washer is formed of a hard material.
  • the outer diameter of the shear sleeve is preferably smaller than the distance between the opposing faces of the first polygonal hole of the shear nut.
  • the polygon is preferably a hexagon.
  • the cross section of the outer surface of the drive nut is preferably circular.
  • a second aspect of the present invention is a blind bolt,
  • the cylindrical portion of the bolt is inserted into the circular hole of the shear nut,
  • the washer is disposed inside the shear nut around the cylindrical portion of the bolt; Adjacent to the washer, a shear sleeve is disposed around the cylindrical portion of the bolt, Adjacent to the shear sleeve, an enlarged sleeve is disposed around the cylindrical portion and the male screw portion of the bolt,
  • a blind bolt assembled so that the drive nut is disposed around the male screw portion of the bolt adjacent to the diameter-enlarging sleeve, and the female screw portion of the drive nut is engaged with the male screw portion of the bolt. It is.
  • the blind bolt parts When the blind bolt parts are assembled into a blind bolt, the blind bolt can be inserted into the mounting holes of the mounting member and the mounted member and fastened easily.
  • the washer, the shear sleeve, the diameter-expanding sleeve, and the drive nut are fixed so as not to rotate with respect to each other.
  • the washer, shear sleeve, diameter-expanding sleeve, and drive nut are fixed so as not to rotate with each other, the drive nut does not rotate together when the bolt is rotated.
  • the washer, the shear sleeve, the diameter-expanding sleeve, and the drive nut are joined by welding.
  • the washer, the shear sleeve, the diameter expansion sleeve, and the drive nut can be easily joined by welding.
  • a third aspect of the present invention is a fastening structure in which a mounting member formed with a mounting hole and a mounted member formed with a mounting hole are fastened with a blind bolt, A bolt having a large-diameter head, a cylindrical portion adjacent to the head, and a male screw portion adjacent to the cylindrical portion; A shear nut disposed around the cylindrical portion of the bolt and formed with a circular hole, a first polygon hole adjacent to the circular hole, and a second polygon hole adjacent to the first polygon hole.
  • a washer sheared into an inner portion and an outer portion A cylindrical shear sleeve around the cylindrical portion of the bolt and adjacent the inner portion of the washer; A cylindrical diameter-enlarged sleeve that extends from the inside of the mounting hole of the mounting member and the mounting member to the outside of the mounting hole, around the column portion of the bolt; A drive nut having an internal thread portion engaged with the external thread portion of the bolt, An enlarged diameter portion is formed in a portion outside the mounting hole of the enlarged diameter sleeve, The sheared inner portion of the washer is received within the first polygonal hole of the shear nut around the cylindrical portion of the bolt and held against rotation; The outer portion of the sheared washer is received within the second polygonal hole of the shear nut around the shear sleeve;
  • the fastening structure is characterized in that the attachment member and the attached member are fastened between an end face of the shearing nut and the enlarged diameter portion of the enlarged diameter sleeve.
  • a second enlarged diameter portion is formed adjacent to the enlarged diameter portion of the enlarged diameter sleeve.
  • the diameter-expanded portion becomes larger, and the mounting member and the mounted member can be fastened with a large axial force.
  • a fourth aspect of the present invention is a shear nut that is a component part of a blind bolt for fastening an attachment member in which an attachment hole is formed and a to-be-attached member in which an attachment hole is formed, A circular hole through which the cylindrical portion of the bolt passes; A first polygonal hole adjacent to the circular hole; A second polygonal hole adjacent to the first polygonal hole is formed; The distance between the opposing faces of the first polygon hole is larger than the inner diameter of the circular hole, and the distance between the opposing faces of the second polygon hole is between the opposing faces of the first polygon hole. It is a shear nut characterized by being larger than the distance.
  • a fifth aspect of the present invention is a fastening method for fastening the attachment member and the attached member by a blind bolt, Align the mounting hole of the mounting member and the mounting hole of the mounted member, The blind bolt is inserted into the mounting hole of the mounting member and the mounting hole of the mounted member, with the drive nut at the head, Contacting the second end surface of the shearing nut with the surface of the mounting member around the mounting hole; Fixing the shear nut, rotating the bolt, and further engaging the male threaded portion of the bolt with the female threaded portion of the drive nut; Expanding the diameter expansion sleeve to form an expanded diameter portion; The bolt is further rotated so that the male screw portion of the bolt is further engaged with the female screw portion of the drive nut, and a step between the first polygon hole and the second polygon hole of the shear nut.
  • a blind bolt fastening method comprising: fastening the attachment member and the attached member between the second end surface of the shearing nut and the enlarged diameter portion of the enlarged diameter sleeve.
  • the fastening method of fastening the mounting member and the mounted member with the blind bolt includes a step of expanding the diameter-expanding sleeve, a step of shearing the washer, and a step of fastening the mounting member and the mounted member.
  • the diameter of the sleeve can be expanded stably.
  • the step of expanding the diameter-expanding sleeve again to form a second diameter-expanded portion is preferably, after the step of shearing the washer.
  • the enlarged diameter portion and the second enlarged diameter portion are formed on the enlarged diameter sleeve, the enlarged diameter portion becomes large, and the attachment member and the attached member can be fastened with a large axial force.
  • the present invention it is possible to provide a blind bolt that can be stably and easily fastened with a high axial force using a commercially available tool without using a fastening tool. Further, it is possible to provide a blind bolt in which the nut does not rotate even when the bolt is rotated.
  • FIG. 4 is an enlarged view of a portion B in FIG. 3. It is a right view of the shear nut of FIG.
  • FIG. 4 is a cross-sectional view of the shear nut of FIG. 2 along the line AA in FIG. 3.
  • FIG. 4 is a perspective view of the blind volt
  • FIG. 1 is an exploded perspective view of the blind bolt according to the first embodiment.
  • the blind bolt according to the first embodiment includes a bolt 10, a shear nut 20, a washer 30, a shear sleeve 40, a diameter expansion sleeve 50, and a drive nut 60.
  • the bolt 10 has a head 11 having a hexagonal cross section at one end.
  • the bolt 10 has a cylindrical column portion 13 adjacent to the head portion 11.
  • the tip of the cylindrical portion 13 is a cylindrical male screw portion 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 a metal such as steel or stainless steel. A commercially available bolt 10 can be used.
  • FIG. 2 is a perspective view of the shear nut 20 used in the blind bolt of the first embodiment.
  • FIG. 3 is a front view in which a part of the shearing nut 20 is sectioned
  • FIG. 4 is an enlarged view of a portion B in FIG.
  • FIG. 5 is a right side view of the shear nut 20.
  • 6 is a cross-sectional view of the shear nut 20 taken along the line AA in FIG.
  • the cross section of the outer surface 21 of the shearing nut 20 is hexagonal, and the ridge line portion between the surfaces is chamfered.
  • the outer surface 21 of the shearing nut 20 may have other angles such as a quadrangular shape.
  • the outer surface 21 of the shearing nut 20 may have any shape that can be fixed with a spanner or the like.
  • One end of the shear nut 20 is a first end face 25, and a through hole is formed in the axial direction from the first end face 25.
  • the first end face 25 side of the through hole is a circular hole 22 having a circular cross section.
  • the inner diameter of the circular hole 22 is slightly larger than the outer diameter of the cylindrical cylindrical portion 13 of the bolt 10, and the cylindrical portion 13 and the male screw portion 15 of the bolt 10 can be passed through the circular hole 22.
  • a first polygon hole 23 having a hexagonal cross section is formed adjacent to the circular hole 22.
  • the distance between the opposing faces of the first polygon hole 23 is larger than the inner diameter of the circular hole 22.
  • a first step portion 26 perpendicular to the axial direction.
  • the first step portion 26 is circular on the inside and hexagonal on the outside.
  • a second polygonal hole 24 having a hexagonal cross section is formed adjacent to the first polygonal hole 23 up to the other end of the through hole.
  • the second polygon hole 24 is larger than the first polygon hole 23. That is, the distance between the opposing vertices of the second polygonal hole 24 is longer than the distance between the opposing vertices of the first polygonal hole 23.
  • the distance between the opposing surfaces of the second polygonal hole 24 is longer than the distance between the opposing surfaces of the first polygonal hole 23.
  • a second step portion 27 perpendicular to the axial direction is formed between the first polygonal hole 23 and the second polygonal hole 24, a second step portion 27 perpendicular to the axial direction is formed.
  • the second step portion 27 is hexagonal on both the inside and outside.
  • FIG. 4 which is an enlarged view of a portion B in FIG. 3, a circumferential groove 27 d whose outer side is deeper toward the first polygonal hole 23 is formed on the outer periphery of the second step portion 27. Is formed over.
  • the groove 27d may or may not have a shape after being molded by a mold.
  • the second polygonal hole 24 side of the shear nut 20 is a second end face 28.
  • the second end face 28 has a circular outer shape.
  • the shape of the second end face 28 is a shape that can be formed by forging and does not have to be circular.
  • the shearing nut 20 is a part that shears the washer 30 and is made of a metal such as high hardness steel or stainless steel. In one example, the steel is quenched and tempered and the Rockwell hardness is between 35 and 45 HRC.
  • the washer 30 used for the blind bolt of the first embodiment will be described.
  • the outer surface 31 has a hexagonal cross section, two end surfaces perpendicular to the axial direction are flat, and a central hole 32 having a circular cross section in the axial direction is formed.
  • 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 32 of the washer 30, and the cylindrical portion 13 of the bolt 10 can be inserted into the central hole 32 of the washer 30.
  • the hexagonal outer surface 31 of the washer 30 matches the inner surface of the second polygonal hole 24 of the shear nut 20.
  • the washer 30 cannot enter the inner surface of the first polygonal hole 23 of the shear nut 20.
  • the thickness of the washer 30 is approximately equal to the depth of the second polygonal hole 24 of the shear nut 20.
  • the washer 30 can be sheared by the second step portion 27 of the shearing nut 20 and the end surface of the shearing sleeve 40 described later.
  • the washer 30 is made of a metal material having low hardness so that the shape of the polygonal hole 23 is transferred after shearing.
  • washer 30 is made of tempered steel and has a Vickers hardness of Hv 120-140. Moreover, when making with a hard material, it is desirable to use a stepped washer as shown in FIG.
  • the shear sleeve 40 used for the blind bolt of the first embodiment will be described with reference to FIG.
  • the shear sleeve 40 is a cylindrical member.
  • the shear sleeve outer surface 41 of the shear sleeve 40 has a circular cross section.
  • the outer diameter of the shear sleeve 40 is smaller than the distance between the opposing sides of the first polygon hole 23 of the shear nut 20, and the shear sleeve 40 can be inserted into the first polygon hole 23.
  • a shear sleeve hole 42 having a circular cross section is formed in the shear sleeve 40.
  • the inner diameter of the shear sleeve hole 42 is substantially equal to the inner diameter of the center hole 32 of the washer 30.
  • the inner diameter of the shear sleeve hole 42 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 shear sleeve hole 42 of the shear sleeve 40.
  • the inner diameter of the shear sleeve hole 42 is substantially equal to the inner diameter of the circular hole 22 of the shear nut 20. Since the shear sleeve 40 shears the washer 30, it is made of a hard metal. In one embodiment, it is made of steel with a Rockwell hardness of 42-45 HRC.
  • the diameter expansion sleeve 50 used in the blind bolt of the first embodiment will be described.
  • the diameter-expanding sleeve 50 is a cylindrical member.
  • the cross section of the outer diameter surface 51 of the diameter expansion sleeve 50 is circular.
  • the outer diameter of the expanded sleeve 50 is substantially equal to the outer shape of the shear sleeve 40.
  • An enlarged diameter sleeve hole 52 having a circular cross section is formed in the enlarged diameter sleeve 50.
  • the inner diameter of the enlarged diameter sleeve hole 52 is substantially equal to the inner diameter of the center hole 42 of the shear sleeve 40.
  • the diameter-expanding sleeve 50 is made of steel that has low hardness and is easily deformed because it is subjected to pressure in the axial direction by the shearing sleeve 40 and the drive nut 60 and buckles to expand its diameter. In one embodiment, it is made of steel that has not been heat-treated after forging and has a Vickers hardness of 36-39 Hv.
  • the drive nut 60 used in the blind bolt of the first embodiment will be described.
  • the drive nut 60 is a cylindrical member.
  • the cross section of the drive nut outer surface 61 of the drive nut 60 is circular.
  • the outer diameter of the drive nut 60 is slightly larger than the outer diameter of the outer surface 51 of the expanded sleeve 50 so that a sufficient axial force can be applied to the expanded sleeve 50.
  • the drive nut 60 is formed with a drive nut hole having a circular cross section.
  • the drive nut hole is an internal thread portion 62, and an internal thread that can be engaged with the external thread of the external thread portion 15 of the bolt 10 is formed.
  • the drive nut 60 is made of steel that has high hardness and is difficult to deform because the diameter of the expansion sleeve 50 is axially pressurized and buckled to increase the diameter. In one embodiment, it is tempered and tempered and made of steel with a Rockwell hardness of 36-39 HRC. Although the cross section of the outer surface of the drive nut 60 is circular, a commercially available nut having a hexagonal cross section can also be used. However, it is necessary to have an internal thread that engages with the external thread of the external thread portion 15 of the bolt 10.
  • a washer 30 is set in the second polygonal hole 24 of the shearing nut 20.
  • the bolt 10 is inserted from the side of the circular hole 22 of the shear nut 20 with the male screw portion 15 of the bolt 10 at the head.
  • the male screw portion 15 and the cylindrical portion 13 of the bolt 10 pass through the through hole of the shear nut 20 and pass through the center hole 32 of the washer 30.
  • the shear sleeve 40 is inserted from the side of the male screw portion 15 of the bolt 10 so that the male screw portion 15 of the bolt 10 enters the shear sleeve hole 42 of the shear sleeve 40.
  • the diameter expansion sleeve 50 is inserted from the side of the male thread portion 15 of the bolt 10 so that the male thread portion 15 of the bolt 10 enters the diameter expansion sleeve hole 52 of the diameter expansion sleeve 50.
  • the end surface of the diameter expanding sleeve 50 comes into contact with the end surface of the shearing sleeve 40, it stops.
  • the drive nut 60 is set on the male screw portion 15 of the bolt, and the drive nut 60 is rotated so that the female screw of the female screw portion 62 of the drive nut hole engages with the male screw of the male screw portion 15 of the bolt.
  • the end face of the drive nut 60 comes into contact with the end face of the diameter expansion sleeve 50, the rotation of the drive nut 60 is stopped.
  • the washer 30, the shear sleeve 40, the diameter expanding sleeve 50, and the drive nut 60 are coupled so as not to rotate with respect to each other.
  • these parts are joined by welding. This connection is made so that these parts do not rotate together when the bolt 10 is rotated and the drive nut 60 is retracted.
  • the method for preventing these components from rotating relative to each other may be other than welding. It is also possible to prevent mutual rotation by forming engaging portions that are in mesh with these components and engaging the engaging portions of adjacent components.
  • FIG. 10 is a front view with a cross section of a part of the stage where the blind bolt is set on the mounted member 70 and the mounting member 71.
  • FIG. 11 is a front view with a cross section of a part of the intermediate stage to be fastened.
  • FIG. 12 is a front view with a cross section of a part of the stage where the fastening is completed.
  • the right side of FIG. 10 is the blind side, and the left side is the work side.
  • the mounted member 70 is disposed on the blind side and the mounting member 71 is disposed on the work side, and the blind bolt is attached from the left work side.
  • the mounted member 70 and the mounting member 71 are overlapped so that the mounting hole 72 of the mounted member 70 and the mounting hole 73 of the mounting member 71 are positioned.
  • the assembled blind bolt is inserted into the mounting hole 72 of the mounted member 70 and the mounting hole 73 of the mounting member 71 from the mounting member 71 side.
  • the second end face 28 of the shear nut 20 abuts on the surface around the attachment hole 73 of the attachment member 71.
  • the attached member 70 is a lower plate such as an automobile panel
  • the attachment member 71 is a member attached to the attached member 70.
  • the outer surface 21 of the shearing nut 20 is fixed with a spanner or the like, the bolt 10 is rotated, and the male screw of the male screw portion 15 of the bolt 10 is further engaged with the female screw portion 62 of the driving nut hole of the driving nut 60. .
  • the washer 30 is accommodated in the second polygonal hole 24 of the shear nut 20 and cannot be rotated in the shear nut 20. Since the washer 30, the shear sleeve 40, the diameter-expanding sleeve 50, and the drive nut 60 are welded, the drive nut 60 does not rotate and moves to the left in FIG.
  • the shearing nut 20, washer 30, shearing sleeve 40, and diameter-expansion sleeve 50 are subjected to axial compression force by the head 11 of the bolt 10 and the drive nut 60. Since the diameter-expanded sleeve 50 is most easily deformed, the diameter-expanded portion is deformed so that the middle diameter-expanded sleeve 50 is diameter-expanded to form the diameter-expanded portion 54a. At this stage, there is a slight distance in the axial direction from the surface of the attached member 70 to the enlarged diameter portion 54a.
  • the mounting member 71 and the mounted member 70 are sandwiched between the end face of the shear nut 20 and the enlarged diameter portion 54a.
  • the force required to shear the washer 30 is greater than the force required to expand the diameter expansion sleeve 50. Therefore, at the stage of expanding the diameter expansion sleeve 50, the washer 30 stays between the second step portion 27 of the shear nut 20 and the end surface of the shear sleeve 40 and is not sheared.
  • FIG. 12 is a cross-sectional view showing a stage where the fastening operation is completed.
  • the outer portion 34 of the washer 30 is received by the hexagonal second step 27 of the shear nut 20, and the inner side 35 of the washer 30 is pushed by the cylindrical end face of the shear sleeve 40, Washer 30 is sheared.
  • the outer surface of the inner portion 35 becomes a hexagon that conforms to the first polygonal hole 23 and enters the first polygonal hole 23 of the shearing nut 20.
  • the inner surface of the inner part 35 is originally circular and the inner part 35 is pushed by the cylindrical end face of the shear sleeve 40.
  • the inner surface of the inner part 35 remains circular.
  • the outer surface of the inner portion 35 of the washer 30 is stopped by the first polygonal hole 23 of the shearing nut 20.
  • the inner portion 35 of the washer 30 is welded to the shear sleeve 40, and the diameter-expanding sleeve 50 and the drive nut 60 are welded in order. Therefore, if the shear nut 20 is held so as not to rotate, the drive nut 60 will not rotate together even if the bolt 10 is rotated.
  • the diameter expansion sleeve 50 is pushed to the left.
  • the washer 30 is sheared, the inner portion 35 of the washer 30 is pushed into the first polygonal hole 23 of the shear nut 20 by the shear sleeve 40. Since there is still a space between the inner portion 35 of the washer 30 and the first step portion 26 of the shear nut 20, no axial compressive force is applied to the washer 30 and the shear sleeve 40.
  • the tightening torque when the bolt 10 is engaged with the drive nut 60 is once lowered.
  • the force required to shear the washer 30 is greater than the force required to expand the diameter expansion sleeve 50.
  • the washer 30 can be sheared by the shearing nut 20 and the shearing sleeve 50 after the diameter-enlarging sleeve 50 is stably expanded with a low load to form the expanded-diameter portion 54a. Thereafter, the diameter-expanded sleeve 50 is further compressed in the axial direction to form a second diameter-expanded portion 54b. Can be fastened with a strong axial force. Even after the washer 30 is sheared, the inner portion 35 of the washer 30 is prevented from rotating by the first polygonal hole 23 of the shearing nut 20.
  • the inner portion 35 of the washer 30 is welded to the shear sleeve 40, the diameter-expanding sleeve 50, and the drive nut 60 in this order. Therefore, if the shear nut 20 is held so as not to rotate, the drive nut 60 is prevented from rotating. Even if the bolt 10 is rotated, the drive nut 60 does not rotate together, and the bolt 10 can be securely screwed.
  • FIG. 13 is a perspective view of a washer 30 ′ used for the blind bolt according to the second embodiment of the present invention
  • FIG. 14 is a front view of a part of the blind bolt using the washer 30 ′. Only the difference between the washer 30 ′ and the washer 30 of the first embodiment will be described.
  • the washer 30 ′ is a stepped washer, and has a hexagonal first portion 36a having a small cross section and a hexagonal second portion 36b larger than the first portion 36a.
  • the outer surface of the first portion 36a is a first outer surface 31a
  • the outer surface of the second portion 36b is a second outer surface 31b.
  • the first portion 36 a fits the inner surface of the first polygonal hole 23 of the shear nut 20.
  • the second portion 36 b fits inside the second polygonal hole 24 of the shear nut 20.
  • the depth of the second polygonal hole 24 'of the shear nut 20 is shallower than the entire thickness of the washer 30' and is substantially equal to the thickness of the second portion 36b.
  • the portion of the second portion 36 b that is larger than the first portion 36 a is sheared to become the outer portion 34.
  • the inside of the first portion 36a and the second portion 36b is the inner portion 35. Since the second portion 36b is sheared, the sheared thickness is thinner than the overall thickness of the washer 30 ′. Therefore, when the washer is made of a hard material, it is preferable to use a stepped washer 30 ′.
  • the blind bolt of the second embodiment can fasten the mounting member 71 and the mounted member 70 with a strong axial force.

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  • Dowels (AREA)

Abstract

Provided is a blind bolt which can be fastened with high axial force by means of a commercial tool without using a fastening tool. This blind bolt for fastening an attachment member (71) having an attachment hole (73) formed therein and an attached member (70) having an attachment hole formed therein is provided with: a bolt (10) having a large-diameter head part (11), a cylindrical part (13) adjacent to the head part, and a male screw part (15) adjacent to the cylindrical part; a shear nut (20) in which a circular hole (22) through which the cylindrical part of the bolt passes, a first polygonal hole (23) adjacent to the circular hole, and a second polygonal hole (24) adjacent to the first polygonal hole are formed; a shearable washer (30) which, around the cylindrical part of the bolt, can be accommodated in the second polygonal hole; a cylindrical shear sleeve (40) in which is formed a shear sleeve hole (42) through which the cylindrical part of the bolt passes; a cylindrical enlarged diameter sleeve (50) in which is formed an enlarged diameter sleeve hole (52) through which the cylindrical part of the bolt passes; and a drive nut having a drive nut hole formed therein and having a female screw part (62) that can be engaged with the male screw part 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、安定して高い軸力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 fastened stably with a high axial force.
　中空の金属製リベットボディと、マンドレルとを備えるブラインドリベットは良く知られている。ブラインドリベットのリベットボディは、一端のリベット頭部と、リベット頭部から延びる筒状のスリーブとを有する。ブラインドリベットのマンドレルは、スリーブの内径より大径の頭部と、リベットボディに挿入できる軸部とを有する。 Blind rivets with hollow metal rivet bodies and mandrels are well known. The rivet body of the blind rivet has a rivet head at one end and a cylindrical sleeve extending from the rivet head. The mandrel of the blind rivet has a head having a diameter larger than the inner diameter of the sleeve and a shaft portion that can be inserted into the rivet body.
　リベットボディとマンドレルを組付けたブラインドリベットをパネル等の被取付部材の取付孔に挿入し、リベット頭部を締結工具で保持して、マンドレルの軸部を把持してリベット頭部側から強く引き抜くと、リベットボディのスリーブの一端部が拡径し、マンドレルは軸部の細い破断可能部で破断する。リベット頭部と、拡径したスリーブの拡径部の間に被取付部材が挟まれて締結される。
　ブラインドリベットは、複数の被取付部材を一方の側からだけの作業で連結できるという利点がある。 Insert the blind rivet assembled with the rivet body and mandrel into the mounting hole of the mounted member such as a panel, hold the rivet head with the fastening tool, grip the mandrel shaft and pull it strongly from the rivet head side Then, one end portion of the sleeve of the rivet body is expanded in diameter, and the mandrel is broken at the thin breakable portion of the shaft portion. The mounted member is sandwiched and fastened between the rivet head and the enlarged diameter portion of the enlarged sleeve.
The blind rivet has an advantage that a plurality of attached members can be connected by an operation only from one side.
　従来のブラインドリベットは、マンドレルの軸部を細い破断可能部で破断するため、専用の締結工具が必要であり、破断する時大きい荷重が必要であり、スリーブからマンドレルの軸部が引き抜かれる為、せん断荷重が低くなるという欠点があった。
　このようなブラインドリベットの欠点を改良するため、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リベット部材とを備えるブラインドボルトがある。ブラインドボルトは、ボルト部材の雄ねじをリベット部材の雌ねじに螺合させることにより、リベット部材の一部を拡径させ、被取付部材を締結する。リベット部材にボルト部材が挿入された状態で被取付部材の取付孔に締結されるため、せん断荷重を高くすることができる。 Since the conventional blind rivet breaks the mandrel shaft part with a thin breakable part, a dedicated fastening tool is required, a large load is required when it breaks, and the mandrel shaft part is pulled out from the sleeve, There was a drawback that the shear load was lowered.
In order to improve the disadvantages of such blind rivets, there is a blind bolt including a bolt member having a male screw and a rivet member having a female screw screwed to the bolt member. In the blind bolt, the male screw of the bolt member is screwed into the female screw of the rivet member, so that the diameter of a part of the rivet member is expanded and the attached member is fastened. Since the bolt member is inserted into the rivet member and fastened to the mounting hole of the mounted member, the shear load can be increased.
　特許文献１は、ボルトと、カラーと、座屈ナットと、ワッシャとを備えるブラインドボルトを開示する。特許文献１のブラインドボルトを取付けるには、カラーを保持した状態でボルトを回転させていくと、座屈ナットの管状部が座屈し、拡径部が形成され、被取付部材は、座屈ナットの多角形頭部と拡径部との間に挟まれる。ボルトを更に回転させていくと、ワッシャが剪断され、取付部材は、カラーと被取付部材との間に挟まれて固定される。 Patent Document 1 discloses a blind bolt including a bolt, a collar, a buckling nut, and a washer. In order to attach the blind bolt of Patent Document 1, when the bolt is rotated while holding the collar, the tubular portion of the buckling nut is buckled and an enlarged diameter portion is formed, and the attached member is a buckling nut. Is sandwiched between the polygonal head and the enlarged diameter portion. When the bolt is further rotated, the washer is sheared, and the mounting member is sandwiched and fixed between the collar and the mounted member.
　特許文献１のブラインドボルトは、専用の締結工具を用いず、市販の工具を用いて容易に取り付けることが出来る。ボルトを締め付けていく動作は、座屈ナットの管状部を座屈させて被取付部材に取り付ける段階と、ワッシャを破断させて、カラーにより取付部材を被取付部材に取り付ける段階とに分けるので、高い軸力で締結することが出来る。
　しかし、特許文献１のブラインドボルトのカラーは、外側、内側とも６角形であり、座屈ナットの多角形頭部は外側が６角形である。このブラインドボルトは、部品が相互に回転しないように特殊形状の部品を使うので、コストが高くなるという欠点がある。 The blind bolt of Patent Document 1 can be easily attached using a commercially available tool without using a dedicated fastening tool. The operation of tightening the bolt is divided into the step of buckling the tubular part of the buckling nut and attaching it to the attached member, and the step of breaking the washer and attaching the attachment member to the attached member by the collar. Can be fastened with axial force.
However, the color of the blind bolt of Patent Document 1 is hexagonal on both the outside and the inside, and the polygonal head of the buckling nut is hexagonal on the outside. This blind bolt uses a specially shaped part so that the parts do not rotate relative to each other, and thus has the disadvantage of increasing costs.
　特許文献２は、ブラインド側の頭（ヘッド）と複数のねじ山とを有するコアピン（ボルト）と、コアピンの雄ねじへねじ込まれるナットと、主スリーブと、拡張可能なスリーブとを備える盲ボルト（ブラインドボルト）を開示する。また、盲ボルトは、支持座金と剪断座金を有する締付け力調節構造を備える。工具によりコアピンに軸方向力をかけ、拡張可能なスリーブを外方へ膨張させ、次に、剪断座金を剪断する。その後、コアピンを環状破断頸溝（破断可能部）で破断し、ピンテール部分を切り離し、取付けが完了する。 Patent Document 2 discloses a blind bolt (blind) including a core pin (bolt) having a head on the blind side and a plurality of threads, a nut screwed into a male screw of the core pin, a main sleeve, and an expandable sleeve. Bolt) is disclosed. The blind bolt includes a tightening force adjusting structure having a support washer and a shear washer. An axial force is applied to the core pin with a tool to expand the expandable sleeve outward and then shear the shear washer. Thereafter, the core pin is broken at the annular fracture neck groove (breakable portion), the pin tail portion is cut off, and the attachment is completed.
　特許文献２の盲ボルトの拡張可能なスリーブは、局所的に焼鈍されたもので加工に手間がかかる。特許文献２の盲ボルトを締結するには、ソケット部材と、ソケット部材とは独立に回転させることが出来る外側レンチ部材とを備える専用の工具が必要である。
　また、コアピンを環状破断頸溝で破断するので、破断する荷重が一定しない恐れがあった。 The expandable sleeve of the blind bolt of Patent Document 2 is locally annealed and takes a lot of work. In order to fasten the blind bolt of Patent Document 2, a dedicated tool including a socket member and an outer wrench member that can be rotated independently of the socket member is required.
Further, since the core pin is broken at the annular fracture neck groove, there is a fear that the breaking load is not constant.
　そのため、締結装置を使用せずに市販の工具を用いて、安定して高い軸力で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。
　特に、ボルトを回転させるとき、ナットが共回りしない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 that can be stably fastened with a high axial force using a commercially available tool without using a fastening device.
In particular, there is a need for a brine bolt that does not rotate with the nut when the bolt is rotated.
特開２０１３－２４９８５０号公報JP 2013-249850 A 特開平８－１２１４４３号公報JP-A-8-121443
　従って、本発明の目的は、締結工具を用いず市販の工具を用いて、安定して高い軸力でブラインドボルトの締結を行うことができるブラインドボルトを提供することである。
　本発明の別の目的は、ボルトを回転させても、ナットが共回りしないブラインドボルトを提供することである。 Accordingly, an object of the present invention is to provide a blind bolt capable of stably fastening a blind bolt with a high axial force using a commercially available tool without using a fastening tool.
Another object of the present invention is to provide a blind bolt in which the nut does not rotate when the bolt is rotated.
　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、剪断ナットと、ワッシャと、剪断スリーブと、拡径スリーブと、駆動ナットとの６部品を備える。これらの部品はできるだけ単純で市販部品を使える形状とし、部品を相互に溶接し、共回りしないようにしている。 In order to achieve this object, the blind bolt of the present invention includes six parts including a bolt, a shearing nut, a washer, a shearing sleeve, a diameter expanding sleeve, and a driving nut. These parts are made as simple as possible and have shapes that allow commercial parts to be used. The parts are welded together so that they do not rotate together.
　本発明の第１の態様は、取付孔が形成された取付部材と取付孔が形成された被取付部材を締結するための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、
　前記ボルトの前記頭部側の第１端面に位置し、前記円柱部が通る円形孔と、前記円形孔に隣接する第１多角形孔と、前記第１多角形孔に隣接し、前記第１端面と反対側の第２端面に位置する第２多角形孔とが形成された剪断ナットと、
　前記ボルトの前記円柱部の周りで前記剪断ナットの内側に収容できる剪断可能なワッシャと、
　前記ボルトの前記円柱部が通る剪断スリーブ孔が形成された円筒形の剪断スリーブと、
　前記ボルトの前記円柱部が通る拡径スリーブ孔が形成された円筒形の拡径スリーブと、
　駆動ナット孔が形成され、前記ボルトの前記雄ねじ部と係合することが出来る雌ねじ部を有する駆動ナットと、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 for fastening an attachment member in which an attachment hole is formed and an attached member in which an attachment hole is formed,
A bolt having a large-diameter head, a cylindrical portion adjacent to the head, and a male screw portion adjacent to the cylindrical portion;
A first circular hole located on the first end surface of the bolt on the head side, through which the cylindrical portion passes, a first polygonal hole adjacent to the circular hole, and adjacent to the first polygonal hole, the first A shear nut formed with a second polygonal hole located on the second end surface opposite to the end surface;
A shearable washer that can be housed inside the shear nut around the cylindrical portion of the bolt;
A cylindrical shear sleeve formed with a shear sleeve hole through which the cylindrical portion of the bolt passes;
A cylindrical expansion sleeve formed with an expansion sleeve hole through which the cylindrical portion of the bolt passes;
A blind bolt comprising: a drive nut having a female screw portion formed with a drive nut hole and capable of engaging with the male screw portion of the bolt.
　ブラインドボルトが、ボルトと、剪断ナットと、ワッシャと、剪断スリーブと、拡径スリーブと、駆動ナットとの６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。
　剪断ナット以外の部品は、簡単な形状で、安価に製造することが出来る。 When the blind bolt includes six parts including a bolt, a shearing nut, a washer, a shearing sleeve, a diameter-expanding sleeve, and a drive nut, the blind bolt can be easily formed by combining these parts. .
Parts other than the shearing nut can be manufactured at a low cost with a simple shape.
　前記剪断ナットの前記第１多角形孔の対向する面間の距離は、前記円形孔の内径より大きく、前記第２多角形孔の対向する面間の距離は、前記第１多角形孔の対向する面間の距離より大きいことが好ましい。 The distance between the opposing faces of the first polygonal hole of the shear nut is larger than the inner diameter of the circular hole, and the distance between the opposing faces of the second polygonal hole is opposite the first polygonal hole. It is preferable that the distance is larger than the distance between the two surfaces.
　第２多角形孔の対向する面間の距離が、第１多角形孔の対向する面間の距離より大きいと、第２多角形孔と第１多角形孔の間に第２段部を形成することが出来る。 If the distance between the opposing faces of the second polygon hole is greater than the distance between the opposing faces of the first polygon hole, a second step is formed between the second polygon hole and the first polygon hole. I can do it.
　前記ワッシャの外形は、前記剪断ナットの前記第２多角形孔の内形に適合することが好ましい。 The outer shape of the washer is preferably adapted to the inner shape of the second polygonal hole of the shear nut.
　ワッシャの外形が、剪断ナットの第２多角形孔の内形に適合すると、ワッシャは第２多角形孔に回転しないように収容することができる。 When the outer shape of the washer matches the inner shape of the second polygon hole of the shear nut, the washer can be accommodated in the second polygon hole so as not to rotate.
　前記ワッシャは、第１部分と、前記第１部分より大きい外形の第２部分とを有し、
　前記ワッシャの前記第１部分の外形は、前記剪断ナットの前記第１多角形孔の内形に適合し、前記第２部分の外形は、前記第２多角形孔の内形に適合することが好ましい。 The washer has a first portion and a second portion having an outer shape larger than the first portion;
The outer shape of the first portion of the washer is adapted to the inner shape of the first polygonal hole of the shear nut, and the outer shape of the second portion is adapted to the inner shape of the second polygonal hole. preferable.
　ワッシャが、小さい外形の第１部分と、第１部分より大きい外形の第２部分とを有し、
　ワッシャの第１部分の外形が、剪断ナットの第１多角形孔の内形に適合し、第２部分の外形が、第２多角形孔の内形に適合すると、ワッシャを剪断する段階で、ワッシャの第２部分のみを剪断することができる。そのため、ワッシャが硬い材料で形成されている場合に適する。 The washer has a first part with a small outer shape and a second part with an outer shape larger than the first part;
When the outer shape of the first portion of the washer matches the inner shape of the first polygon hole of the shear nut and the outer shape of the second portion matches the inner shape of the second polygon hole, the step of shearing the washer includes: Only the second part of the washer can be sheared. Therefore, it is suitable when the washer is formed of a hard material.
　前記剪断スリーブの外径は、前記剪断ナットの前記第１多角形孔の対向する面間の距離より小さいことが好ましい。 The outer diameter of the shear sleeve is preferably smaller than the distance between the opposing faces of the first polygonal hole of the shear nut.
　前記多角形は六角形であることが好ましい。
　前記駆動ナットの外面の断面は円形であることが好ましい。 The polygon is preferably a hexagon.
The cross section of the outer surface of the drive nut is preferably circular.
　本発明の第２の態様は、ブラインドボルトであって、
　前記剪断ナットの前記円形孔に、前記ボルトの前記円柱部が挿入され、
　前記ボルトの前記円柱部の周りで前記剪断ナットの内側に前記ワッシャが配置され、
　前記ワッシャに隣接して、前記ボルトの前記円柱部の周りに剪断スリーブが配置され、
　前記剪断スリーブに隣接して、前記ボルトの前記円柱部と前記雄ねじ部の周りに拡径スリーブが配置され、
　前記拡径スリーブに隣接して、前記ボルトの前記雄ねじ部の周りに前記駆動ナットが配置され、前記ボルトの前記雄ねじ部に前記駆動ナットの前記雌ねじ部が係合するように組み立てられたブラインドボルトである。 A second aspect of the present invention is a blind bolt,
The cylindrical portion of the bolt is inserted into the circular hole of the shear nut,
The washer is disposed inside the shear nut around the cylindrical portion of the bolt;
Adjacent to the washer, a shear sleeve is disposed around the cylindrical portion of the bolt,
Adjacent to the shear sleeve, an enlarged sleeve is disposed around the cylindrical portion and the male screw portion of the bolt,
A blind bolt assembled so that the drive nut is disposed around the male screw portion of the bolt adjacent to the diameter-enlarging sleeve, and the female screw portion of the drive nut is engaged with the male screw portion of the bolt. It is.
　ブラインドボルトの部品を組み立ててブラインドボルトとしておくと、取付部材と被取付部材の取付孔にブラインドボルトを挿入して、容易に締結することが出来る。 When the blind bolt parts are assembled into a blind bolt, the blind bolt can be inserted into the mounting holes of the mounting member and the mounted member and fastened easily.
　前記ワッシャと、前記剪断スリーブと、前記拡径スリーブと、前記駆動ナットとは、相互に回転しないように固定されていることが好ましい。 It is preferable that the washer, the shear sleeve, the diameter-expanding sleeve, and the drive nut are fixed so as not to rotate with respect to each other.
　ワッシャと、剪断スリーブと、拡径スリーブと、駆動ナットとは、相互に回転しないように固定されていると、ボルトを回転させるとき、駆動ナットは共回りしない。 If the washer, shear sleeve, diameter-expanding sleeve, and drive nut are fixed so as not to rotate with each other, the drive nut does not rotate together when the bolt is rotated.
　前記ワッシャと、前記剪断スリーブと、前記拡径スリーブと、前記駆動ナットとは、溶接により接合されていることが好ましい。 It is preferable that the washer, the shear sleeve, the diameter-expanding sleeve, and the drive nut are joined by welding.
　ワッシャと、剪断スリーブと、拡径スリーブと、駆動ナットとは、溶接により容易に接合することが出来る。 The washer, the shear sleeve, the diameter expansion sleeve, and the drive nut can be easily joined by welding.
　本発明の第３の態様は、取付孔が形成された取付部材と取付孔が形成された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、
　前記ボルトの前記円柱部の周りに配置され、円形孔と、前記円形孔に隣接する第１多角形孔と、前記第１多角形孔に隣接する第２多角形孔とが形成された剪断ナットと、
　内側部分と外側部分とに剪断されたワッシャと、
　前記ボルトの前記円柱部の周りで、前記ワッシャの前記内側部分に隣接する円筒形の剪断スリーブと、
　前記ボルトの前記円柱部の周りで、前記被取付部材と取付部材の前記取付孔の内部から前記取付孔の外まで延びる円筒形の拡径スリーブと、
　前記ボルトの前記雄ねじ部と係合している雌ねじ部を有する駆動ナットと、を備え、
　前記拡径スリーブの前記取付孔の外の部分には拡径部が形成され、
　剪断された前記ワッシャの前記内側部分は、前記ボルトの前記円柱部の周りで、前記剪断ナットの前記第１多角形孔の内側に収容され、回らないように保持され、
　剪断された前記ワッシャの前記外側部分は、前記剪断スリーブの周りで、前記剪断ナットの前記第２多角形孔の内側に収容され、
　前記剪断ナットの端面と、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締結されていることを特徴とする締結構造である。 A third aspect of the present invention is a fastening structure in which a mounting member formed with a mounting hole and a mounted member formed with a mounting hole are fastened with a blind bolt,
A bolt having a large-diameter head, a cylindrical portion adjacent to the head, and a male screw portion adjacent to the cylindrical portion;
A shear nut disposed around the cylindrical portion of the bolt and formed with a circular hole, a first polygon hole adjacent to the circular hole, and a second polygon hole adjacent to the first polygon hole. When,
A washer sheared into an inner portion and an outer portion;
A cylindrical shear sleeve around the cylindrical portion of the bolt and adjacent the inner portion of the washer;
A cylindrical diameter-enlarged sleeve that extends from the inside of the mounting hole of the mounting member and the mounting member to the outside of the mounting hole, around the column portion of the bolt;
A drive nut having an internal thread portion engaged with the external thread portion of the bolt,
An enlarged diameter portion is formed in a portion outside the mounting hole of the enlarged diameter sleeve,
The sheared inner portion of the washer is received within the first polygonal hole of the shear nut around the cylindrical portion of the bolt and held against rotation;
The outer portion of the sheared washer is received within the second polygonal hole of the shear nut around the shear sleeve;
The fastening structure is characterized in that the attachment member and the attached member are fastened between an end face of the shearing nut and the enlarged diameter portion of the enlarged diameter sleeve.
　剪断されたワッシャの内側部分は、ボルトの円柱部の周りで、剪断ナットの第１多角形孔の内側に収容されていると、ワッシャの内側部分の外面は多角形になり、剪断ナットの第１多角形孔の中で回らないように保持される。 When the inner part of the sheared washer is received around the cylindrical part of the bolt and inside the first polygonal hole of the shearing nut, the outer surface of the inner part of the washer becomes polygonal, It is held so as not to rotate in one polygonal hole.
　前記拡径スリーブの前記拡径部に隣接して、第２拡径部が形成されていることが好ましい。 It is preferable that a second 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、拡径部が大きくなり、大きい軸力で取付部材と被取付部材を締結することが出来る。 When the second diameter-expanded portion is formed adjacent to the diameter-expanded portion of the diameter-expanded sleeve, the diameter-expanded portion becomes larger, and the mounting member and the mounted member can be fastened with a large axial force.
　本発明の第４の態様は、取付孔が形成された取付部材と取付孔が形成された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剪断ナットであって、
　前記ボルトの前記円柱部が通る円形孔と、
　前記円形孔に隣接する第１多角形孔と、
　前記第１多角形孔に隣接する第２多角形孔とが形成され、
　前記第１多角形孔の対向する面間の距離は、前記円形孔の内径より大きく、前記第２多角形孔の対向する面間の距離は、前記第１多角形孔の対向する面間の距離より大きいことを特徴とする剪断ナットである。 A fourth aspect of the present invention is a shear nut that is a component part of a blind bolt for fastening an attachment member in which an attachment hole is formed and a to-be-attached member in which an attachment hole is formed,
A circular hole through which the cylindrical portion of the bolt passes;
A first polygonal hole adjacent to the circular hole;
A second polygonal hole adjacent to the first polygonal hole is formed;
The distance between the opposing faces of the first polygon hole is larger than the inner diameter of the circular hole, and the distance between the opposing faces of the second polygon hole is between the opposing faces of the first polygon hole. It is a shear nut characterized by being larger than the distance.
　剪断ナットの第１多角形孔と第２多角形孔の間の第２段部でワッシャを受け、円筒形の剪断スリーブでワッシャを打ち抜くと、ワッシャの剪断された内側部分は、剪断ナットの第１多角形孔に入って回転止めされる。 When a washer is received at the second step between the first polygon hole and the second polygon hole of the shear nut and the washer is punched with a cylindrical shear sleeve, the sheared inner portion of the washer becomes the first of the shear nut. One polygon hole is inserted and rotation is stopped.
　本発明の第５の態様は、ブラインドボルトにより前記取付部材と前記被取付部材を締結する締結方法であって、
　前記取付部材の前記取付孔と前記被取付部材の前記取付孔とを位置合わせし、
　前記ブラインドボルトを、前記駆動ナットを先頭にして、前記取付部材の前記取付孔と前記被取付部材の前記取付孔とに挿入し、
　前記剪断ナットの前記第２端面を前記取付部材の前記取付孔の周りの表面に当接させ、
　前記剪断ナットを固定して、前記ボルトを回転させて、前記ボルトの前記雄ねじ部を前記駆動ナットの前記雌ねじ部と更に係合させ、
　前記拡径スリーブを拡径させて拡径部を形成し、
　前記ボルトを更に回転させて、前記ボルトの前記雄ねじ部を前記駆動ナットの前記雌ねじ部と更に係合させて、前記剪断ナットの前記第１多角形孔と前記第２多角形孔の間の段部と、前記剪断スリーブとにより、前記ワッシャを剪断し、
　前記剪断ナットの前記第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を締結する段階を備えることを特徴とするブラインドボルトの締結方法である。 A fifth aspect of the present invention is a fastening method for fastening the attachment member and the attached member by a blind bolt,
Align the mounting hole of the mounting member and the mounting hole of the mounted member,
The blind bolt is inserted into the mounting hole of the mounting member and the mounting hole of the mounted member, with the drive nut at the head,
Contacting the second end surface of the shearing nut with the surface of the mounting member around the mounting hole;
Fixing the shear nut, rotating the bolt, and further engaging the male threaded portion of the bolt with the female threaded portion of the drive nut;
Expanding the diameter expansion sleeve to form an expanded diameter portion;
The bolt is further rotated so that the male screw portion of the bolt is further engaged with the female screw portion of the drive nut, and a step between the first polygon hole and the second polygon hole of the shear nut. The washer is sheared by the portion and the shearing sleeve,
A blind bolt fastening method comprising: fastening the attachment member and the attached member between the second end surface of the shearing nut and the enlarged diameter portion of the enlarged diameter sleeve.
　ブラインドボルトにより取付部材と被取付部材を締結する締結方法が、拡径スリーブを拡径させる段階と、ワッシャを剪断する段階と、取付部材と被取付部材を締結する段階とを備えると、拡径スリーブを安定して拡径させることが出来る。 When the fastening method of fastening the mounting member and the mounted member with the blind bolt includes a step of expanding the diameter-expanding sleeve, a step of shearing the washer, and a step of fastening the mounting member and the mounted member. The diameter of the sleeve can be expanded stably.
　前記ワッシャを剪断する段階の後、前記拡径スリーブを再度拡径させて、第２拡径部を形成する段階を備えることが好ましい。 Preferably, after the step of shearing the washer, the step of expanding the diameter-expanding sleeve again to form a second diameter-expanded portion.
　拡径スリーブに、拡径部と、第２拡径部が形成されていると、拡径部が大きくなり、大きい軸力で取付部材と被取付部材を締結することが出来る。 When the enlarged diameter portion and the second enlarged diameter portion are formed on the enlarged diameter sleeve, the enlarged diameter portion becomes large, and the attachment member and the attached member can be fastened with a large axial force.
　本発明によれば、締結工具を用いず市販の工具を用いて、安定して高い軸力で容易に締結することができるブラインドボルトを提供することが出来る。
　また、ボルトを回転させても、ナットが共回りしない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 that can be stably and easily fastened with a high axial force using a commercially available tool without using a fastening tool.
Further, it is possible to provide a blind bolt in which the nut does not rotate even when the bolt is rotated.
本発明の第１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 a disassembled perspective view of the components of the blind bolt of the 1st Embodiment of this invention. 図１のブラインドボルトの剪断ナットの斜視図である。It is a perspective view of the shear nut of the blind bolt of FIG. 図２の剪断ナットの一部を断面にした正面図である。It is the front view which made a part of shear nut of Drawing 2 into a section. 図３のＢ部分の拡大図である。FIG. 4 is an enlarged view of a portion B in FIG. 3. 図２の剪断ナットの右側面図である。It is a right view of the shear nut of FIG. 図２の剪断ナットの図３のＡ-Ａ線に沿った断面図である。FIG. 4 is a cross-sectional view of the shear nut of FIG. 2 along the line AA in FIG. 3. 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 volt | bolt which assembled the components of FIG. 図７のブラインドボルトの一部を断面にした正面図である。It is the front view which made a part of blind bolt of Drawing 7 into a section. 図７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７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 the cross section the part of the state which set the blind volt | bolt of FIG. 7 to the attachment member and the to-be-attached member. 図７のブラインドボルトにより取付部材と被取付部材を締結する中間段階の一部を断面とした正面図である。It is the front view which made a cross section a part of intermediate stage which fastens an attachment member and a to-be-attached member with the blind volt | bolt of FIG. 図７のブラインドボルトにより取付部材と被取付部材を締結が完了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 the part of the stage which the fastening of the attachment member and the to-be-attached member was completed with the blind volt | bolt of FIG. 本発明の第２の実施形態のブラインドボルトのワッシャの斜視図である。It is a perspective view of the washer of the blind bolt of the 2nd embodiment of the present invention. 図１３のワッシャを使用したブラインドボルトの一部を断面にした正面図である。It is the front view which made a part of blind bolt which used the washer of FIG. 13 the cross section.
（第１の実施形態）
　以下、図面を参照して、本発明の第１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、第１の実施形態のブラインドボルトの分解斜視図である。第１の実施形態のブラインドボルトは、ボルト10と、剪断ナット20と、ワッシャ30と、剪断スリーブ40と、拡径スリーブ50と、駆動ナット60とを備える。 (First embodiment)
Hereinafter, a blind bolt according to a first embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an exploded perspective view of the blind bolt according to the first embodiment. The blind bolt according to the first embodiment includes a bolt 10, a shear nut 20, a washer 30, a shear sleeve 40, a diameter expansion sleeve 50, and a drive nut 60.
　図１を参照して、第１の実施形態のブラインドボルトを構成するボルト10と、剪断ナット20と、ワッシャ30と、剪断スリーブ40と、拡径スリーブ50と、駆動ナット60とについて順に説明する。剪断ナット20以外は、単純な形状なので、図１のみを用いて説明する。
　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。 With reference to FIG. 1, the bolt 10, the shear nut 20, the washer 30, the shear sleeve 40, the diameter-expansion sleeve 50, and the drive nut 60 which comprise the blind bolt of 1st Embodiment are demonstrated in order. . Since the shape other than the shearing nut 20 is a simple shape, description will be made using only FIG.
The bolt 10 has a head 11 having a hexagonal cross section at one end. The bolt 10 has a cylindrical column portion 13 adjacent to the head portion 11. The tip of the cylindrical portion 13 is a cylindrical male screw portion 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 a metal such as steel or stainless steel. A commercially available bolt 10 can be used.
　図２は、第１の実施形態のブラインドボルトに使用する剪断ナット20の斜視図である。図３は剪断ナット20の一部を断面にした正面図、図４は図３のＢ部分の拡大図である。図５は剪断ナット20の右側面図である。図６は剪断ナット20の図３のＡ-Ａ線に沿った断面図である。
　剪断ナット20の外面21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。剪断ナット20の外面21は、４角形等他の角数とすることもできる。剪断ナット20の外面21は、スパナ等で固定することができる形状であれば良い。 FIG. 2 is a perspective view of the shear nut 20 used in the blind bolt of the first embodiment. FIG. 3 is a front view in which a part of the shearing nut 20 is sectioned, and FIG. 4 is an enlarged view of a portion B in FIG. FIG. 5 is a right side view of the shear nut 20. 6 is a cross-sectional view of the shear nut 20 taken along the line AA in FIG.
The cross section of the outer surface 21 of the shearing nut 20 is hexagonal, and the ridge line portion between the surfaces is chamfered. The outer surface 21 of the shearing nut 20 may have other angles such as a quadrangular shape. The outer surface 21 of the shearing nut 20 may have any shape that can be fixed with a spanner or the like.
　剪断ナット20の一方の端部は、第１端面25であり、第１端面25から軸方向に貫通孔が形成されている。貫通孔の第１端面25側は、断面が円形の円形孔22である。円形孔22の内径は、ボルト10の円柱形の円柱部13の外径よりやや大きく、円形孔22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 shear nut 20 is a first end face 25, and a through hole is formed in the axial direction from the first end face 25. The first end face 25 side of the through hole is a circular hole 22 having a circular cross section. The inner diameter of the circular hole 22 is slightly larger than the outer diameter of the cylindrical cylindrical portion 13 of the bolt 10, and the cylindrical portion 13 and the male screw portion 15 of the bolt 10 can be passed through the circular hole 22.
　円形孔22に隣接して、断面が六角形の第１多角形孔23が形成されている。第１多角形孔23の対向する面間の距離は、円形孔22の内径より大きい。円形孔22と第１多角形孔23の間は、軸方向に直角の第１段部26となっている。第１段部26は、内側が円形、外側が六角形である。
　第１多角形孔23に隣接して、貫通孔の他方の端部まで、断面が六角形の第２多角形孔24が形成されている。第２多角形孔24は第１多角形孔23より大きい。即ち、第２多角形孔24の対向する頂点間の距離は、第１多角形孔23の対向する頂点間の距離より長い。第２多角形孔24の対向する面間の距離は、第１多角形孔23の対向する面間の距離より長い。第１多角形孔23と、第２多角形孔24との間は、軸方向に直角の第２段部27となっている。第２段部27は、内側外側とも六角形である。 A first polygon hole 23 having a hexagonal cross section is formed adjacent to the circular hole 22. The distance between the opposing faces of the first polygon hole 23 is larger than the inner diameter of the circular hole 22. Between the circular hole 22 and the first polygonal hole 23 is a first step portion 26 perpendicular to the axial direction. The first step portion 26 is circular on the inside and hexagonal on the outside.
A second polygonal hole 24 having a hexagonal cross section is formed adjacent to the first polygonal hole 23 up to the other end of the through hole. The second polygon hole 24 is larger than the first polygon hole 23. That is, the distance between the opposing vertices of the second polygonal hole 24 is longer than the distance between the opposing vertices of the first polygonal hole 23. The distance between the opposing surfaces of the second polygonal hole 24 is longer than the distance between the opposing surfaces of the first polygonal hole 23. Between the first polygonal hole 23 and the second polygonal hole 24, a second step portion 27 perpendicular to the axial direction is formed. The second step portion 27 is hexagonal on both the inside and outside.
　図３のＢ部分の拡大図である図４に示すように、第２段部27の外周部には、外側が第１多角形孔23の側に深くなる円周状の溝27dが全周にわたって形成されている。溝27dは、金型により成形した後の形状であり、なくてもよい。 As shown in FIG. 4, which is an enlarged view of a portion B in FIG. 3, a circumferential groove 27 d whose outer side is deeper toward the first polygonal hole 23 is formed on the outer periphery of the second step portion 27. Is formed over. The groove 27d may or may not have a shape after being molded by a mold.
　剪断ナット20の第２多角形孔24の側は、第２端面28である。第２端面28は、外形が円形となっている。この第２端面28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。
　剪断ナット20は、ワッシャ30を剪断する部品であり、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。 The second polygonal hole 24 side of the shear nut 20 is a second end face 28. The second end face 28 has a circular outer shape. The shape of the second end face 28 is a shape that can be formed by forging and does not have to be circular.
The shearing nut 20 is a part that shears the washer 30 and is made of a metal such as high hardness steel or stainless steel. In one example, the steel is quenched and tempered and the Rockwell hardness is between 35 and 45 HRC.
　図１に戻って、第１の実施形態のブラインドボルトに使用するワッシャ30について説明する。ワッシャ30は、外面31の断面が六角形で、軸方向に垂直な２つの端面は平面で、軸方向に断面が円形の中心孔32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30の中心孔32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30の中心孔32に挿入することが出来る。 Returning to FIG. 1, the washer 30 used for the blind bolt of the first embodiment will be described. In the washer 30, the outer surface 31 has a hexagonal cross section, two end surfaces perpendicular to the axial direction are flat, and a central hole 32 having a circular cross section in the axial direction is formed.
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 32 of the washer 30, and the cylindrical portion 13 of the bolt 10 can be inserted into the central hole 32 of the washer 30.
　ワッシャ30の六角形の外面31は、剪断ナット20の第２多角形孔24の内面と適合する。ワッシャ30は、剪断ナット20の第１多角形孔23の内面に入れることはできない。
　ワッシャ30の厚さは、剪断ナット20の第２多角形孔24の深さとほぼ等しい。ワッシャ30は、剪断ナット20の第２多角形孔24に入れると、第１多角形孔23と、第２多角形孔24との間の段部27で停止し、ワッシャ30は、第２多角形孔24に収容することが出来る。 The hexagonal outer surface 31 of the washer 30 matches the inner surface of the second polygonal hole 24 of the shear nut 20. The washer 30 cannot enter the inner surface of the first polygonal hole 23 of the shear nut 20.
The thickness of the washer 30 is approximately equal to the depth of the second polygonal hole 24 of the shear nut 20. When the washer 30 is inserted into the second polygonal hole 24 of the shearing nut 20, the washer 30 stops at the step portion 27 between the first polygonal hole 23 and the second polygonal hole 24. It can be accommodated in the square hole 24.
　ワッシャ30は、剪断ナット20の第２段部27と、後述する剪断スリーブ40の端面により剪断可能である。ワッシャ30は、剪断後多角形孔23の形状が転写されるように硬度の低い金属材料でできている。１実施例では、ワッシャ30は、焼きならしした鋼で出来ていて、ビッカース硬度Hv120～140である。また、硬い材料で造る場合は、図１３のような段付ワッシャとすることが望ましい。 The washer 30 can be sheared by the second step portion 27 of the shearing nut 20 and the end surface of the shearing sleeve 40 described later. The washer 30 is made of a metal material having low hardness so that the shape of the polygonal hole 23 is transferred after shearing. In one embodiment, washer 30 is made of tempered steel and has a Vickers hardness of Hv 120-140. Moreover, when making with a hard material, it is desirable to use a stepped washer as shown in FIG.
　引き続き図１を参照して、第１の実施形態のブラインドボルトに使用する剪断スリーブ40について説明する。剪断スリーブ40は、円筒形の部材である。剪断スリーブ40の剪断スリーブ外面41の断面は円形である。剪断スリーブ40の外径は、剪断ナット20の第１多角形孔23の対向する辺間の距離より小さく、剪断スリーブ40は、第１多角形孔23に挿入することが出来る。 The shear sleeve 40 used for the blind bolt of the first embodiment will be described with reference to FIG. The shear sleeve 40 is a cylindrical member. The shear sleeve outer surface 41 of the shear sleeve 40 has a circular cross section. The outer diameter of the shear sleeve 40 is smaller than the distance between the opposing sides of the first polygon hole 23 of the shear nut 20, and the shear sleeve 40 can be inserted into the first polygon hole 23.
　剪断スリーブ40には、断面が円形の剪断スリーブ孔42が形成されている。剪断スリーブ孔42の内径は、ワッシャ30の中心孔32の内径とほぼ等しい。剪断スリーブ孔42の内径は、ボルト10の円柱部13の外径と等しいか、少し大きく、ボルト10の円柱部13は、剪断スリーブ40の剪断スリーブ孔42に挿入することが出来る。剪断スリーブ孔42の内径は、剪断ナット20の円形孔22の内径とほぼ等しい。
　剪断スリーブ40は、ワッシャ30を剪断するので、硬い金属で出来ている。１実施例では、ロックウェル硬度42～45HRCの鋼で出来ている。 A shear sleeve hole 42 having a circular cross section is formed in the shear sleeve 40. The inner diameter of the shear sleeve hole 42 is substantially equal to the inner diameter of the center hole 32 of the washer 30. The inner diameter of the shear sleeve hole 42 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 shear sleeve hole 42 of the shear sleeve 40. The inner diameter of the shear sleeve hole 42 is substantially equal to the inner diameter of the circular hole 22 of the shear nut 20.
Since the shear sleeve 40 shears the washer 30, it is made of a hard metal. In one embodiment, it is made of steel with a Rockwell hardness of 42-45 HRC.
　引き続き図１を参照して、第１の実施形態のブラインドボルトに使用する拡径スリーブ50について説明する。拡径スリーブ50は、円筒形の部材である。拡径スリーブ50の拡径スリーブ外面51の断面は円形である。拡径スリーブ50の外径は、剪断スリーブ40の外形とほぼ等しい。
　拡径スリーブ50には、断面が円形の拡径スリーブ孔52が形成されている。拡径スリーブ孔52の内径は、剪断スリーブ40の中心孔42の内径とほぼ等しい。
　拡径スリーブ50は、剪断スリーブ40と駆動ナット60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。 With continued reference to FIG. 1, the diameter expansion sleeve 50 used in the blind bolt of the first embodiment will be described. The diameter-expanding sleeve 50 is a cylindrical member. The cross section of the outer diameter surface 51 of the diameter expansion sleeve 50 is circular. The outer diameter of the expanded sleeve 50 is substantially equal to the outer shape of the shear sleeve 40.
An enlarged diameter sleeve hole 52 having a circular cross section is formed in the enlarged diameter sleeve 50. The inner diameter of the enlarged diameter sleeve hole 52 is substantially equal to the inner diameter of the center hole 42 of the shear sleeve 40.
The diameter-expanding sleeve 50 is made of steel that has low hardness and is easily deformed because it is subjected to pressure in the axial direction by the shearing sleeve 40 and the drive nut 60 and buckles to expand its diameter. In one embodiment, it is made of steel that has not been heat-treated after forging and has a Vickers hardness of 36-39 Hv.
　引き続き図１を参照して、第１の実施形態のブラインドボルトに使用する駆動ナット60について説明する。駆動ナット60は、円筒形の部材である。駆動ナット60の駆動ナット外面61の断面は円形である。駆動ナット60の外径は、拡径スリーブ50の拡径スリーブ外面51の外径より少し大きく、拡径スリーブ50に十分に軸方向に力をかけられるようになっている。
　駆動ナット60には、断面が円形の駆動ナット孔が形成されている。駆動ナット孔は、雌ねじ部62となっていて、ボルト10の雄ねじ部15の雄ねじと係合することが出来る雌ねじが形成されている。 With continued reference to FIG. 1, the drive nut 60 used in the blind bolt of the first embodiment will be described. The drive nut 60 is a cylindrical member. The cross section of the drive nut outer surface 61 of the drive nut 60 is circular. The outer diameter of the drive nut 60 is slightly larger than the outer diameter of the outer surface 51 of the expanded sleeve 50 so that a sufficient axial force can be applied to the expanded sleeve 50.
The drive nut 60 is formed with a drive nut hole having a circular cross section. The drive nut hole is an internal thread portion 62, and an internal thread that can be engaged with the external thread of the external thread portion 15 of the bolt 10 is formed.
　駆動ナット60は、拡径スリーブ50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。
　駆動ナット60の外面の断面は円形としたが、断面六角形の市販のナットを使用することもできる。但し、ボルト10の雄ねじ部15の雄ねじと係合する雌ねじを有するものである必要がある。 The drive nut 60 is made of steel that has high hardness and is difficult to deform because the diameter of the expansion sleeve 50 is axially pressurized and buckled to increase the diameter. In one embodiment, it is tempered and tempered and made of steel with a Rockwell hardness of 36-39 HRC.
Although the cross section of the outer surface of the drive nut 60 is circular, a commercially available nut having a hexagonal cross section can also be used. However, it is necessary to have an internal thread that engages with the external thread of the external thread portion 15 of the bolt 10.
　図７と、図８を参照して、ブラインドボルトの構成部品であるボルト10と、剪断ナット20と、ワッシャ30と、剪断スリーブ40と、拡径スリーブ50と、駆動ナット60との組立てについて説明する。
　剪断ナット20の第２多角形孔24にワッシャ30をセットする。剪断ナット20の円形孔22の側から、ボルト10の雄ねじ部15を先頭にしてボルト10を挿入する。ボルト10の雄ねじ部15と円柱部13は、剪断ナット20の貫通孔を通り、ワッシャ30の中心孔32を通る。ボルト10の頭部11の端面が剪断ナット20の円形孔23側の第１端面25に当接すると、ボルト10は停止する。 With reference to FIGS. 7 and 8, the assembly of the bolt 10, the shear nut 20, the washer 30, the shear sleeve 40, the diameter-expanding sleeve 50, and the drive nut 60, which are the components of the blind bolt, will be described. To do.
A washer 30 is set in the second polygonal hole 24 of the shearing nut 20. The bolt 10 is inserted from the side of the circular hole 22 of the shear nut 20 with the male screw portion 15 of the bolt 10 at the head. The male screw portion 15 and the cylindrical portion 13 of the bolt 10 pass through the through hole of the shear nut 20 and pass through the center hole 32 of the washer 30. When the end face of the head 11 of the bolt 10 comes into contact with the first end face 25 of the shear nut 20 on the circular hole 23 side, the bolt 10 stops.
　次に、ボルト10の雄ねじ部15の側から、剪断スリーブ40を挿入し、剪断スリーブ40の剪断スリーブ孔42にボルト10の雄ねじ部15が入るようにする。剪断スリーブ40の端面が、ワッシャ30の端面に当接すると停止する。
　次に、ボルト10の雄ねじ部15の側から、拡径スリーブ50を挿入し、拡径スリーブ50の拡径スリーブ孔52にボルト10の雄ねじ部15が入るようにする。拡径スリーブ50の端面が、剪断スリーブ40の端面に当接すると停止する。 Next, the shear sleeve 40 is inserted from the side of the male screw portion 15 of the bolt 10 so that the male screw portion 15 of the bolt 10 enters the shear sleeve hole 42 of the shear sleeve 40. When the end surface of the shearing sleeve 40 comes into contact with the end surface of the washer 30, it stops.
Next, the diameter expansion sleeve 50 is inserted from the side of the male thread portion 15 of the bolt 10 so that the male thread portion 15 of the bolt 10 enters the diameter expansion sleeve hole 52 of the diameter expansion sleeve 50. When the end surface of the diameter expanding sleeve 50 comes into contact with the end surface of the shearing sleeve 40, it stops.
　最後に、駆動ナット60をボルトの雄ねじ部15にセットし、駆動ナット孔の雌ねじ部62の雌ねじが、ボルトの雄ねじ部15の雄ねじに係合するように、駆動ナット60を回転させる。駆動ナット60の端面が、拡径スリーブ50の端面に当接したところで、駆動ナット60の回転を停止する。 Finally, the drive nut 60 is set on the male screw portion 15 of the bolt, and the drive nut 60 is rotated so that the female screw of the female screw portion 62 of the drive nut hole engages with the male screw of the male screw portion 15 of the bolt. When the end face of the drive nut 60 comes into contact with the end face of the diameter expansion sleeve 50, the rotation of the drive nut 60 is stopped.
　ワッシャ30と、剪断スリーブ40と、拡径スリーブ50と、駆動ナット60とを相互に回転しないように、結合する。第１の実施形態では、これらの部品は溶接で結合する。ボルト10を回転させ、駆動ナット60を引き込むとき、これらの部品が共回りしないようにするため、この結合は行われる。
　これらの部品が相互に回転しないようにする方法は、溶接以外でもよい。これらの部品に相互に噛み合う形状の係合部を形成し、隣接する部品の係合部同士を係合させることにより、相互に回転しないようにすることもできる。 The washer 30, the shear sleeve 40, the diameter expanding sleeve 50, and the drive nut 60 are coupled so as not to rotate with respect to each other. In the first embodiment, these parts are joined by welding. This connection is made so that these parts do not rotate together when the bolt 10 is rotated and the drive nut 60 is retracted.
The method for preventing these components from rotating relative to each other may be other than welding. It is also possible to prevent mutual rotation by forming engaging portions that are in mesh with these components and engaging the engaging portions of adjacent components.
（締結動作）
　図１０～図１２を参照して、組立てたブラインドボルトにより、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１０は、ブラインドボルトを被取付部材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１１は、締結する中間段階の一部を断面とした正面図である。図１２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１０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を取り付ける作業をする。 (Fastening operation)
The operation of attaching the attachment member 71 to the attachment member 70 with the assembled blind bolt will be described with reference to FIGS. FIG. 10 is a front view with a cross section of a part of the stage where the blind bolt is set on the mounted member 70 and the mounting member 71. FIG. 11 is a front view with a cross section of a part of the intermediate stage to be fastened. FIG. 12 is a front view with a cross section of a part of the stage where the fastening is completed.
The right side of FIG. 10 is the blind side, and the left side is the work side. The mounted member 70 is disposed on the blind side and the mounting member 71 is disposed on the work side, and the blind bolt is attached from the left work side.
　図１０を参照する。被取付部材70の取付孔72と取付部材71の取付孔73の位置があうように、被取付部材70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を取付部材71の側から挿入する。剪断ナット20の第２端面28が、取付部材71の取付孔73の周りの表面に当接する。
　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。 Please refer to FIG. The mounted member 70 and the mounting member 71 are overlapped so that the mounting hole 72 of the mounted member 70 and the mounting hole 73 of the mounting member 71 are positioned.
The assembled blind bolt is inserted into the mounting hole 72 of the mounted member 70 and the mounting hole 73 of the mounting member 71 from the mounting member 71 side. The second end face 28 of the shear nut 20 abuts on the surface around the attachment hole 73 of the attachment member 71.
Here, the attached member 70 is a lower plate such as an automobile panel, and the attachment member 71 is a member attached to the attached member 70.
　図１１を参照する。剪断ナット20の外面21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の雄ねじを駆動ナット60の駆動ナット孔の雌ねじ部62の雌ねじに更に係合させていく。ワッシャ30は、剪断ナット20の第２多角形孔24に収容されていて、剪断ナット20内で回転できない。ワッシャ30と、剪断スリーブ40と、拡径スリーブ50と、駆動ナット60とは溶接されているので、駆動ナット60は回転せず、図１１の左方へ移動していく。
　剪断ナット20と、ワッシャ30と、剪断スリーブ40と、拡径スリーブ50には、ボルト10の頭部11と駆動ナット60により、軸方向に圧縮する力がかかる。拡径スリーブ50が一番変形しやすいので、拡径スリーブ50の中ほどが拡径するように変形し、拡径部54aが形成される。この段階では、被取付部材70の表面から拡径部54aまでは、軸方向に少し距離があいている。 Please refer to FIG. The outer surface 21 of the shearing nut 20 is fixed with a spanner or the like, the bolt 10 is rotated, and the male screw of the male screw portion 15 of the bolt 10 is further engaged with the female screw portion 62 of the driving nut hole of the driving nut 60. . The washer 30 is accommodated in the second polygonal hole 24 of the shear nut 20 and cannot be rotated in the shear nut 20. Since the washer 30, the shear sleeve 40, the diameter-expanding sleeve 50, and the drive nut 60 are welded, the drive nut 60 does not rotate and moves to the left in FIG.
The shearing nut 20, washer 30, shearing sleeve 40, and diameter-expansion sleeve 50 are subjected to axial compression force by the head 11 of the bolt 10 and the drive nut 60. Since the diameter-expanded sleeve 50 is most easily deformed, the diameter-expanded portion is deformed so that the middle diameter-expanded sleeve 50 is diameter-expanded to form the diameter-expanded portion 54a. At this stage, there is a slight distance in the axial direction from the surface of the attached member 70 to the enlarged diameter portion 54a.
　取付部材71と、被取付部材70とは、剪断ナット20の端面と拡径部54aとの間に挟まれる。
　ワッシャ30を剪断するのに必要な力は、拡径スリーブ50を拡径させるのに必要な力より大きい。そのため、拡径スリーブ50を拡径させる段階では、ワッシャ30は、剪断ナット20の第２段部27と、剪断スリーブ40の端面との間に留まり、剪断されない。 The mounting member 71 and the mounted member 70 are sandwiched between the end face of the shear nut 20 and the enlarged diameter portion 54a.
The force required to shear the washer 30 is greater than the force required to expand the diameter expansion sleeve 50. Therefore, at the stage of expanding the diameter expansion sleeve 50, the washer 30 stays between the second step portion 27 of the shear nut 20 and the end surface of the shear sleeve 40 and is not sheared.
　図１２は、締結動作が完了した段階を示す断面図である。図１１の中間段階から、更にボルト10の雄ねじ部15の雄ねじを駆動ナット60の駆動ナット孔の雌ねじ部62の雌ねじに係合させていくと、ワッシャ30は剪断ナット20の第２段部27で受けられ、剪断スリーブ40の端面により押され、外側部分34と内側部分35とに剪断される。外側部分34は、剪断ナット20の第２段部27に残り、内側部分35は、剪断ナット20の第１多角形孔23内に押し込まれる。 FIG. 12 is a cross-sectional view showing a stage where the fastening operation is completed. When the male screw of the male screw part 15 of the bolt 10 is further engaged with the female screw part 62 of the drive nut hole of the drive nut 60 from the intermediate stage of FIG. 11, the washer 30 becomes the second step part 27 of the shear nut 20. And is pushed by the end face of the shear sleeve 40 to be sheared into the outer portion 34 and the inner portion 35. The outer portion 34 remains in the second step 27 of the shear nut 20 and the inner portion 35 is pushed into the first polygonal hole 23 of the shear nut 20.
　より詳しくは、ワッシャ30の外側部分34は、剪断ナット20の六角形の第２段部27で受けられ、ワッシャ30の内側部分35の内側は、剪断スリーブ40の円筒形の端面で押され、ワッシャ30が剪断される。ワッシャ30が剪断された後、内側部分35の外面は、第１多角形孔23に適合した六角形となり、剪断ナット20の第１多角形孔23内に入る。内側部分35の内面はもともと円形であり、内側部分35が剪断スリーブ40の円筒形の端面で押される。内側部分35の内面は円形のままである。 More specifically, the outer portion 34 of the washer 30 is received by the hexagonal second step 27 of the shear nut 20, and the inner side 35 of the washer 30 is pushed by the cylindrical end face of the shear sleeve 40, Washer 30 is sheared. After the washer 30 is sheared, the outer surface of the inner portion 35 becomes a hexagon that conforms to the first polygonal hole 23 and enters the first polygonal hole 23 of the shearing nut 20. The inner surface of the inner part 35 is originally circular and the inner part 35 is pushed by the cylindrical end face of the shear sleeve 40. The inner surface of the inner part 35 remains circular.
　ワッシャ30が剪断された後も、ワッシャ30の内側部分35の外面は、剪断ナット20の第１多角形孔23により周り止めされている。ワッシャ30の内側部分35は、剪断スリーブ40に溶接され、拡径スリーブ50と、駆動ナット60が順に溶接されている。そのため、剪断ナット20を回転しないように押さえておけば、ボルト10を回転させても、駆動ナット60は共回りしない。 Even after the washer 30 is sheared, the outer surface of the inner portion 35 of the washer 30 is stopped by the first polygonal hole 23 of the shearing nut 20. The inner portion 35 of the washer 30 is welded to the shear sleeve 40, and the diameter-expanding sleeve 50 and the drive nut 60 are welded in order. Therefore, if the shear nut 20 is held so as not to rotate, the drive nut 60 will not rotate together even if the bolt 10 is rotated.
　更に、ボルト10を回転させていくと、拡径スリーブ50は左方へ押されていく。ワッシャ30が剪断されると、ワッシャ30の内側部分35は、剪断スリーブ40により剪断ナット20の第１多角形孔23内に押し込まれる。ワッシャ30の内側部分35と剪断ナット20の第１段部26との間にはまだ空間があるので、ワッシャ30と剪断スリーブ40には、軸方向の圧縮力はかからない。駆動ナット60にボルト10を係合させるときの締付けトルクは一旦低くなる。 Furthermore, when the bolt 10 is rotated, the diameter expansion sleeve 50 is pushed to the left. When the washer 30 is sheared, the inner portion 35 of the washer 30 is pushed into the first polygonal hole 23 of the shear nut 20 by the shear sleeve 40. Since there is still a space between the inner portion 35 of the washer 30 and the first step portion 26 of the shear nut 20, no axial compressive force is applied to the washer 30 and the shear sleeve 40. The tightening torque when the bolt 10 is engaged with the drive nut 60 is once lowered.
　更に、ボルト10を回転させ、被取付部材70の取付孔72の周りに、拡径スリーブ50の拡径部54aが当接すると、締付けトルクは急に高くなる。拡径スリーブ50の拡径部54aと駆動ナット60側の端部の間の部分は、被取付部材70の表面と駆動ナット60の端面とにより、軸方向に圧縮されて拡径し、拡径部54aに隣接して第２拡径部54bが形成される。
　被取付部材70と取付部材71とは、剪断ナット20の第２端面28と、拡径スリーブ50の拡径部54a、第２拡径部54bとの間に強い軸力で固定される。
　これで、ブラインドボルトにより、取付部材71の被取付部材70への取付けが完了する。 Further, when the bolt 10 is rotated and the enlarged diameter portion 54a of the enlarged diameter sleeve 50 abuts around the attachment hole 72 of the attached member 70, the tightening torque suddenly increases. The portion between the enlarged diameter portion 54a of the diameter expansion sleeve 50 and the end portion on the drive nut 60 side is compressed in the axial direction by the surface of the attached member 70 and the end surface of the drive nut 60 to expand the diameter, A second enlarged diameter portion 54b is formed adjacent to the portion 54a.
The mounted member 70 and the mounting member 71 are fixed with a strong axial force between the second end face 28 of the shear nut 20 and the expanded diameter portion 54a and the expanded diameter portion 54b of the expanded diameter sleeve 50.
This completes the mounting of the mounting member 71 to the mounted member 70 by the blind bolt.
　第１の実施形態によれば、拡径スリーブ50を拡径させるのに必要な力より、ワッシャ30を剪断するのに必要な力の方が大きい。拡径スリーブ50を低い荷重で安定的に拡径させて、拡径部54aを形成した後、剪断ナット20と剪断スリーブ50によりワッシャ30を剪断することが出来る。その後、拡径スリーブ50を更に軸方向に圧縮し、第２拡径部54bを形成して、拡径部54aと第２拡径部54bとの協働により、取付部材71と被取付部材70を強い軸力で締結することが出来る。
　ワッシャ30を剪断した後も、ワッシャ30の内側部分35は、剪断ナット20の第１多角形孔23で回り止めされている。ワッシャ30の内側部分35は、剪断スリーブ40、拡径スリーブ50、駆動ナット60と順に溶接されている。そのため、剪断ナット20を回らないように押さえておけば、駆動ナット60は回り止めされる。ボルト10を回転させても、駆動ナット60は共回りせず、ボルト10を確実にねじ込むことが出来る。 According to the first embodiment, the force required to shear the washer 30 is greater than the force required to expand the diameter expansion sleeve 50. The washer 30 can be sheared by the shearing nut 20 and the shearing sleeve 50 after the diameter-enlarging sleeve 50 is stably expanded with a low load to form the expanded-diameter portion 54a. Thereafter, the diameter-expanded sleeve 50 is further compressed in the axial direction to form a second diameter-expanded portion 54b. Can be fastened with a strong axial force.
Even after the washer 30 is sheared, the inner portion 35 of the washer 30 is prevented from rotating by the first polygonal hole 23 of the shearing nut 20. The inner portion 35 of the washer 30 is welded to the shear sleeve 40, the diameter-expanding sleeve 50, and the drive nut 60 in this order. Therefore, if the shear nut 20 is held so as not to rotate, the drive nut 60 is prevented from rotating. Even if the bolt 10 is rotated, the drive nut 60 does not rotate together, and the bolt 10 can be securely screwed.
（第２の実施形態）
　図１３は、本発明の第２の実施形態のブラインドボルトに使用するワッシャ30'の斜視図であり、図１４はワッシャ30'を使用したブラインドボルトの一部を断面にした正面図である。ワッシャ30'については、第１の実施形態のワッシャ30と異なる点のみを説明する。ワッシャ30'は、段付ワッシャであり、断面が小さい六角形の第１部分36aと、第１部分36aより大きい六角形の第２部分36bとを有する。第１部分36aの外面は第１外面31aであり、第２部分36bの外面は第２外面31bである。
　第１部分36aは剪断ナット20の第１多角形孔23の内面に適合する。第２部分36bは剪断ナット20の第２多角形孔24の内面に適合する。 (Second Embodiment)
FIG. 13 is a perspective view of a washer 30 ′ used for the blind bolt according to the second embodiment of the present invention, and FIG. 14 is a front view of a part of the blind bolt using the washer 30 ′. Only the difference between the washer 30 ′ and the washer 30 of the first embodiment will be described. The washer 30 ′ is a stepped washer, and has a hexagonal first portion 36a having a small cross section and a hexagonal second portion 36b larger than the first portion 36a. The outer surface of the first portion 36a is a first outer surface 31a, and the outer surface of the second portion 36b is a second outer surface 31b.
The first portion 36 a fits the inner surface of the first polygonal hole 23 of the shear nut 20. The second portion 36 b fits inside the second polygonal hole 24 of the shear nut 20.
　図１４を参照すると、剪断ナット20の第２多角形孔24'の深さは、ワッシャ30'全体の厚さより浅く、第２部分36bの厚さとほぼ等しい。ワッシャ30'を剪断ナット20の第２多角形孔24'に入れると、第１部分36aと第２部分36bの間の段部は、第１多角形孔23と第２多角形孔24'との間の段部27に当接する。第１部分36aは第１多角形孔23に収容され、第２部分36bは第２多角形孔24に収容される。 Referring to FIG. 14, the depth of the second polygonal hole 24 'of the shear nut 20 is shallower than the entire thickness of the washer 30' and is substantially equal to the thickness of the second portion 36b. When the washer 30 'is inserted into the second polygon hole 24' of the shear nut 20, the step between the first portion 36a and the second portion 36b is connected to the first polygon hole 23 and the second polygon hole 24 '. It abuts on the step 27 between the two. The first portion 36 a is accommodated in the first polygon hole 23, and the second portion 36 b is accommodated in the second polygon hole 24.
　ワッシャ30'が剪断スリーブ40により剪断されるとき、第１部分36aより大きい第２部分36bの部分が、剪断されて外側部分34となる。第１部分36aと、第２部分36bの内側が、内側部分35となる。第２部分36bが剪断されるので、剪断される厚さは、ワッシャ30'全体の厚さより薄い。そのため、ワッシャが硬い材料で出来ている場合は、段付のワッシャ30'を使用することが好ましい。 When the washer 30 ′ is sheared by the shear sleeve 40, the portion of the second portion 36 b that is larger than the first portion 36 a is sheared to become the outer portion 34. The inside of the first portion 36a and the second portion 36b is the inner portion 35. Since the second portion 36b is sheared, the sheared thickness is thinner than the overall thickness of the washer 30 ′. Therefore, when the washer is made of a hard material, it is preferable to use a stepped washer 30 ′.
　第２の実施形態のブラインドボルトも、第１の実施形態のブラインドボルトと同様取付部材71と被取付部材70を強い軸力で締結することが出来る。 As with the blind bolt of the first embodiment, the blind bolt of the second embodiment can fasten the mounting member 71 and the mounted member 70 with a strong axial force.
10　ボルト
11　頭部
13　円柱部
15　雄ねじ部
20　剪断ナット
21　外面
22　円形孔
23　第１多角形孔
24　第２多角形孔
25　第１端面
26　第１段部
27　第２段部
27d　溝
28　第２端面
30　ワッシャ
31　外面
31a　第１外面
31b　第２外面
32　中心孔
34　外側部分
35　内側部分
36a　第１部分
36b　第２部分
40　剪断スリーブ
41　剪断スリーブ外面
42　剪断スリーブ孔
50　拡径スリーブ
51　拡径スリーブ外面
52　拡径スリーブ孔
54a　拡径部
54b　第２拡径部
60　駆動ナット
61　駆動ナット外面
62　雌ねじ部
70　被取付部材
71　取付部材
72　取付孔
73　取付孔 10 volts
11 head
13 Cylinder
15 Male thread
20 Shear nut
21 Exterior
22 circular holes
23 1st polygon hole
24 2nd polygon hole
25 First end face
26 First stage
27 Second stage
27d groove
28 Second end face
30 washer
31 Exterior
31a First outer surface
31b Second outer surface
32 Center hole
34 Outer part
35 inner part
36a 1st part
36b second part
40 Shear sleeve
41 Shear sleeve outer surface
42 Shear sleeve hole
50 Expanding sleeve
51 Expanded sleeve outer surface
52 Expanded sleeve hole
54a Expanded part
54b 2nd enlarged diameter part
60 Drive nut
61 Drive nut outer surface
62 Female thread
70 Mounted member
71 Mounting member
72 Mounting hole
73 Mounting hole

Claims (13)

  1. 　取付孔が形成された取付部材と取付孔が形成された被取付部材を締結するための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、
    　前記ボルトの前記頭部側の第１端面に位置し、前記円柱部が通る円形孔と、前記円形孔に隣接する第１多角形孔と、前記第１多角形孔に隣接し、前記第１端面と反対側の第２端面に位置する第２多角形孔とが形成された剪断ナットと、
    　前記ボルトの前記円柱部の周りで前記剪断ナットの内側に収容できる剪断可能なワッシャと、
    　前記ボルトの前記円柱部が通る剪断スリーブ孔が形成された円筒形の剪断スリーブと、
    　前記ボルトの前記円柱部が通る拡径スリーブ孔が形成された円筒形の拡径スリーブと、
    　駆動ナット孔が形成され、前記ボルトの前記雄ねじ部と係合することが出来る雌ねじ部を有する駆動ナットと、を備えることを特徴とするブラインドボルト。     A blind bolt for fastening an attachment member in which an attachment hole is formed and a member to be attached in which an attachment hole is formed,
    A bolt having a large-diameter head, a cylindrical portion adjacent to the head, and a male screw portion adjacent to the cylindrical portion;
    A first circular hole located on the first end surface of the bolt on the head side, through which the cylindrical portion passes, a first polygonal hole adjacent to the circular hole, and adjacent to the first polygonal hole, the first A shear nut formed with a second polygonal hole located on the second end surface opposite to the end surface;
    A shearable washer that can be housed inside the shear nut around the cylindrical portion of the bolt;
    A cylindrical shear sleeve formed with a shear sleeve hole through which the cylindrical portion of the bolt passes;
    A cylindrical expansion sleeve formed with an expansion sleeve hole through which the cylindrical portion of the bolt passes;
    A blind bolt, comprising: a drive nut having a drive nut hole formed therein and having a female screw portion capable of engaging with the male screw portion of the bolt.
  2. 　請求項１に記載のブラインドボルトであって、
    　前記剪断ナットの前記第１多角形孔の対向する面間の距離は、前記円形孔の内径より大きく、前記第２多角形孔の対向する面間の距離は、前記第１多角形孔の対向する面間の距離より大きいブラインドボルト。     The blind bolt according to claim 1,
    The distance between the opposing faces of the first polygonal hole of the shear nut is larger than the inner diameter of the circular hole, and the distance between the opposing faces of the second polygonal hole is opposite the first polygonal hole. Blind bolts larger than the distance between the surfaces to be
  3. 　請求項２に記載のブラインドボルトであって、
    　前記ワッシャの外形は、前記剪断ナットの前記第２多角形孔の内形に適合するブラインドボルト。     The blind bolt according to claim 2,
    The outer shape of the washer is a blind bolt that matches the inner shape of the second polygonal hole of the shear nut.
  4. 　請求項２に記載のブラインドボルトであって、
    　前記ワッシャは、第１部分と、前記第１部分より大きい外形の第２部分とを有し、
    　前記ワッシャの前記第１部分の外形は、前記剪断ナットの前記第１多角形孔の内形に適合し、前記第２部分の外形は、前記第２多角形孔の内形に適合するブラインドボルト。     The blind bolt according to claim 2,
    The washer has a first portion and a second portion having an outer shape larger than the first portion;
    The outer shape of the first portion of the washer is adapted to the inner shape of the first polygonal hole of the shear nut, and the outer shape of the second portion is adapted to the inner shape of the second polygonal hole. .
  5. 　請求項３又は４に記載のブラインドボルトであって、
    　前記剪断スリーブの外径は、前記剪断ナットの前記第１多角形孔の対向する面間の距離より小さいブラインドボルト。     The blind bolt according to claim 3 or 4,
    The outer diameter of the shear sleeve is a blind bolt smaller than the distance between the opposing faces of the first polygonal hole of the shear nut.
  6. 　請求項１乃至５の何れか１項に記載のブラインドボルトであって、
    　前記剪断ナットの前記円形孔に、前記ボルトの前記円柱部が挿入され、
    　前記ボルトの前記円柱部の周りで前記剪断ナットの内側に前記ワッシャが配置され、
    　前記ワッシャに隣接して、前記ボルトの前記円柱部の周りに剪断スリーブが配置され、
    　前記剪断スリーブに隣接して、前記ボルトの前記円柱部と前記雄ねじ部の周りに拡径スリーブが配置され、
    　前記拡径スリーブに隣接して、前記ボルトの前記雄ねじ部の周りに前記駆動ナットが配置され、前記ボルトの前記雄ねじ部に前記駆動ナットの前記雌ねじ部が係合するように組み立てられたブラインドボルト。     The blind bolt according to any one of claims 1 to 5,
    The cylindrical portion of the bolt is inserted into the circular hole of the shear nut,
    The washer is disposed inside the shear nut around the cylindrical portion of the bolt;
    Adjacent to the washer, a shear sleeve is disposed around the cylindrical portion of the bolt,
    Adjacent to the shear sleeve, an enlarged sleeve is disposed around the cylindrical portion and the male screw portion of the bolt,
    A blind bolt assembled so that the drive nut is disposed around the male screw portion of the bolt adjacent to the diameter-enlarging sleeve, and the female screw portion of the drive nut is engaged with the male screw portion of the bolt. .
  7. 　請求項６に記載のブラインドボルトであって、
    　前記ワッシャと、前記剪断スリーブと、前記拡径スリーブと、前記駆動ナットとは、相互に回転しないように固定されているブラインドボルト。     The blind bolt according to claim 6,
    The blind bolt in which the washer, the shear sleeve, the diameter-expanding sleeve, and the drive nut are fixed so as not to rotate with each other.
  8. 　請求項７に記載のブラインドボルトであって、
    　前記ワッシャと、前記剪断スリーブと、前記拡径スリーブと、前記駆動ナットとは、溶接により接合されているブラインドボルト。     The blind bolt according to claim 7,
    The said washer, the said shearing sleeve, the said diameter expansion sleeve, and the said drive nut are the blind bolts joined by welding.
  9. 　取付孔が形成された取付部材と取付孔が形成された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、
    　前記ボルトの前記円柱部の周りに配置され、円形孔と、前記円形孔に隣接する第１多角形孔と、前記第１多角形孔に隣接する第２多角形孔とが形成された剪断ナットと、
    　内側部分と外側部分とに剪断可能なワッシャと、
    　前記ボルトの前記円柱部の周りで、前記ワッシャの前記内側部分に隣接する円筒形の剪断スリーブと、
    　前記ボルトの前記円柱部の周りで、前記被取付部材と取付部材の前記取付孔の内部から前記取付孔の外まで延びる円筒形の拡径スリーブと、
    　前記ボルトの前記雄ねじ部と係合している雌ねじ部を有する駆動ナットと、を備え、
    　前記拡径スリーブの前記取付孔の外の部分には拡径部が形成され、
    　剪断された前記ワッシャの前記内側部分は、前記ボルトの前記円柱部の周りで、前記剪断ナットの前記第１多角形孔の内側に収容され、回らないように保持され、
    　剪断された前記ワッシャの前記外側部分は、前記剪断スリーブの周りで、前記剪断ナットの前記第２多角形孔の内側に収容され、
    　前記剪断ナットの端面と、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 formed with a mounting hole and a mounted member formed with a mounting hole are fastened with a blind bolt,
    A bolt having a large-diameter head, a cylindrical portion adjacent to the head, and a male screw portion adjacent to the cylindrical portion;
    A shear nut disposed around the cylindrical portion of the bolt and formed with a circular hole, a first polygon hole adjacent to the circular hole, and a second polygon hole adjacent to the first polygon hole. When,
    A washer that can be sheared into the inner part and the outer part;
    A cylindrical shear sleeve around the cylindrical portion of the bolt and adjacent the inner portion of the washer;
    A cylindrical diameter-enlarged sleeve that extends from the inside of the mounting hole of the mounting member and the mounting member to the outside of the mounting hole, around the column portion of the bolt;
    A drive nut having an internal thread portion engaged with the external thread portion of the bolt,
    An enlarged diameter portion is formed in a portion outside the mounting hole of the enlarged diameter sleeve,
    The sheared inner portion of the washer is received within the first polygonal hole of the shear nut around the cylindrical portion of the bolt and held against rotation;
    The outer portion of the sheared washer is received within the second polygonal hole of the shear nut around the shear sleeve;
    The fastening structure, wherein the attachment member and the attached member are fastened between an end face of the shearing nut and the enlarged diameter portion of the enlarged diameter sleeve.
  10. 　請求項９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、第２拡径部が形成されている締結構造。     The fastening structure according to claim 9,
    A fastening structure in which a second enlarged diameter portion is formed adjacent to the enlarged diameter portion of the enlarged diameter sleeve.
  11. 　取付孔が形成された取付部材と取付孔が形成された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剪断ナットであって、
    　前記ボルトの前記円柱部が通る円形孔と、
    　前記円形孔に隣接する第１多角形孔と、
    　前記第１多角形孔に隣接する第２多角形孔とが形成され、
    　前記第１多角形孔の対向する面間の距離は、前記円形孔の内径より大きく、前記第２多角形孔の対向する面間の距離は、前記第１多角形孔の対向する面間の距離より大きいことを特徴とする剪断ナット。     A shear nut that is a component of a blind bolt for fastening an attachment member in which an attachment hole is formed and a member to be attached in which an attachment hole is formed,
    A circular hole through which the cylindrical portion of the bolt passes;
    A first polygonal hole adjacent to the circular hole;
    A second polygonal hole adjacent to the first polygonal hole is formed;
    The distance between the opposing faces of the first polygon hole is larger than the inner diameter of the circular hole, and the distance between the opposing faces of the second polygon hole is between the opposing faces of the first polygon hole. Shear nut characterized by greater than distance.
  12. 　請求項６又は７に記載のブラインドボルトにより前記取付部材と被取付部材を締結する締結方法であって、
    　前記取付部材の前記取付孔と前記被取付部材の前記取付孔とを位置合わせし、
    　前記ブラインドボルトを、前記駆動ナットを先頭にして、前記取付部材の前記取付孔と前記被取付部材の前記取付孔とに挿入し、
    　前記剪断ナットの前記第２端面を前記取付部材の前記取付孔の周りの表面に当接させ、
    　前記剪断ナットを固定して、前記ボルトを回転させて、前記ボルトの前記雄ねじ部を前記駆動ナットの前記雌ねじ部と更に係合させ、
    　前記拡径スリーブを拡径させて拡径部を形成し、
    　前記ボルトを更に回転させて、前記ボルトの前記雄ねじ部を前記駆動ナットの前記雌ねじ部と更に係合させて、前記剪断ナットの前記第１多角形孔と前記第２多角形孔の間の段部と、前記剪断スリーブとにより、前記ワッシャを剪断し、
    　前記剪断ナットの前記第２端面と前記拡径スリーブの前記拡径部との間に、前記取付部材と被取付部材を締結する段階を備えることを特徴とするブラインドボルトの締結方法。     A fastening method for fastening the attachment member and the attached member by the blind bolt according to claim 6 or 7,
    Align the mounting hole of the mounting member and the mounting hole of the mounted member,
    The blind bolt is inserted into the mounting hole of the mounting member and the mounting hole of the mounted member, with the drive nut at the head,
    Contacting the second end surface of the shearing nut with the surface of the mounting member around the mounting hole;
    Fixing the shear nut, rotating the bolt, and further engaging the male threaded portion of the bolt with the female threaded portion of the drive nut;
    Expanding the diameter expansion sleeve to form an expanded diameter portion;
    The bolt is further rotated so that the male screw portion of the bolt is further engaged with the female screw portion of the drive nut, and a step between the first polygon hole and the second polygon hole of the shear nut. The washer is sheared by the portion and the shearing sleeve,
    A blind bolt fastening method comprising: fastening the attachment member and a member to be attached between the second end surface of the shearing nut and the enlarged diameter portion of the enlarged sleeve.
  13. 　請求項１２に記載の締結方法であって、
    　前記ワッシャを剪断する段階の後、前記拡径スリーブを再度拡径させて、第２拡径部を形成する段階を備える締結方法。     The fastening method according to claim 12, comprising:
    After the step of shearing the washer, the fastening method includes a step of expanding the diameter expansion sleeve again to form a second diameter expansion portion.
PCT/JP2018/019820 2017-05-30 2018-05-23 Blind bolt WO2018221343A1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04109214U (en) * 1991-03-06 1992-09-22 川崎製鉄株式会社 blind bolt
JPH06313415A (en) * 1993-04-27 1994-11-08 Toyoda Gosei Co Ltd Coupler
JPH08121443A (en) * 1994-10-03 1996-05-14 Huck Internatl Inc High-strength blind bolt having uniform high clamping withinextending clamping range
JP2013249850A (en) * 2012-05-30 2013-12-12 Nippon Pop Rivets & Fasteners Ltd Blind rivet and method of fastening the same

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH04109214U (en) * 1991-03-06 1992-09-22 川崎製鉄株式会社 blind bolt
JPH06313415A (en) * 1993-04-27 1994-11-08 Toyoda Gosei Co Ltd Coupler
JPH08121443A (en) * 1994-10-03 1996-05-14 Huck Internatl Inc High-strength blind bolt having uniform high clamping withinextending clamping range
JP2013249850A (en) * 2012-05-30 2013-12-12 Nippon Pop Rivets & Fasteners Ltd Blind rivet and method of fastening the same

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