WO2018155204A1 - リベット締結装置 - Google Patents

リベット締結装置 Download PDF

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Publication number
WO2018155204A1
WO2018155204A1 PCT/JP2018/004340 JP2018004340W WO2018155204A1 WO 2018155204 A1 WO2018155204 A1 WO 2018155204A1 JP 2018004340 W JP2018004340 W JP 2018004340W WO 2018155204 A1 WO2018155204 A1 WO 2018155204A1
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WO
WIPO (PCT)
Prior art keywords
jaw
mandrel
rivet
fastening device
peripheral surface
Prior art date
Application number
PCT/JP2018/004340
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
牧野　敬範
大介 森
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 WO2018155204A1 publication Critical patent/WO2018155204A1/ja

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/36—Rivet sets, i.e. tools for forming heads; Mandrels for expanding parts of hollow rivets
    • 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
    • F16B19/00—Bolts without screw-thread; Pins, including deformable elements; Rivets
    • F16B19/04—Rivets; Spigots or the like fastened by riveting
    • F16B19/08—Hollow rivets; Multi-part rivets
    • F16B19/10—Hollow rivets; Multi-part rivets fastened by expanding mechanically

Definitions

  • the present invention relates to a rivet fastening device, and more particularly to a rivet fastening device for fastening a blind rivet having a short mandrel.
  • Blind rivets consist of a rivet body and a mandrel.
  • the rivet body includes a cylindrical sleeve and a large-diameter flange formed at one end of the sleeve.
  • the mandrel includes an elongated mandrel shaft portion and a mandrel head formed at one end of the mandrel shaft portion and having a diameter larger than the inner diameter of the sleeve.
  • a mandrel shaft is inserted from one end of the sleeve of the rivet body. The rivet body and the mandrel are combined so that the mandrel head abuts on one end of the sleeve and the mandrel shaft extends long from the flange.
  • the blind rivet is held by the rivet fastening device in a state where the gripped portion of the mandrel shaft portion is inserted into the nose of the rivet fastening device and the flange of the rivet body is in contact with the nose.
  • the sleeve of the rivet body is inserted into the mounting hole of the fastened member, and the flange comes into contact with the fastened member.
  • the mandrel shaft portion is strongly pulled out by the operation of the pull-in portion of the rivet fastening device, the mandrel head expands a part of the sleeve, and the member to be fastened is strongly held between the sleeve and the flange having the increased diameter.
  • the mandrel breaks at a breakable portion having a small diameter formed on the mandrel shaft.
  • the blind rivet has an advantage that a fastening operation can be performed from one side even if the panel is a panel having a large area such as a vehicle body panel as a member to be fastened.
  • the blind rivet is made of a metal material such as steel or aluminum.
  • the rivet fastening device grips the grip portion of the mandrel shaft portion with the jaw and pulls it strongly. Therefore, the blind rivet has an elongated mandrel shaft portion in the axial direction, and a groove is formed so as not to slip in the grip portion of the mandrel shaft portion.
  • the jaws of the rivet fastening device apply a high surface pressure to the mandrel shaft part and pull out the mandrel shaft part mainly by frictional force, so the mandrel shaft part has a long gripping part, and the rivet fastening device also has a long nose.
  • blind rivet In order to shorten the mandrel, there is a blind rivet in which a large-diameter portion having a large outer diameter is formed at the end of the mandrel opposite to the mandrel head.
  • Such blind rivets are called double head rivets.
  • the outer diameter of the large-diameter portion at the tip of the mandrel is larger than the outer diameter of the sleeve. Therefore, after the rivet body and mandrel are assembled, the process of forming the large-diameter portion at the tip of the mandrel is performed. It was necessary. Further, since the large diameter portion having an outer diameter larger than the outer diameter of the sleeve passes through the opening of the nose piece of the rivet fastening device, the nose piece that supports the flange of the rivet body is a split nose piece divided into several pieces. It is necessary. For this reason, there is a drawback that the cost is increased.
  • Patent Document 1 discloses a rivet setting device for fastening such a double head rivet.
  • the mandrel of a double head rivet has a mounting head that engages an end surface of a tubular rivet body and a tension head for pulling the mandrel.
  • the rivet setting device includes a tensioning assembly that engages the tensioning head of the mandrel and a support segment that supports the rivet. A pulling segment pulls the mandrel backward and fastens the double head rivet.
  • the mandrel of the double head rivet used in Patent Document 1 has a tension head for pulling the mandrel.
  • the outer diameter of the mandrel pulling head is larger than the outer diameter of the rivet. Therefore, after assembling the rivet and the mandrel, a step of expanding the diameter of the mandrel and forming the tension head is necessary.
  • the rivet setting device has a plurality of support segments that surround the tensioning assembly to support the rivet flange when fastening the rivet.
  • the support segment must be divided into segments in order to pass the large diameter tension head of the mandrel.
  • the tension assembly that engages the tension head of the mandrel pulls the edge by pulling the edge to the tension head, so if the diameter of the tension head is small, the tension head may not be pulled by the edge and may slip and slip, making it impossible to retract the mandrel. .
  • Patent Document 2 discloses a blind rivet including a rivet body including a flange and a hollow sleeve, and a mandrel (rivet pin) having a mandrel head disposed at an end of a mandrel shaft portion.
  • the mandrel includes a terminal portion having an outer diameter corresponding to the outer diameter of the mandrel, a conical portion that gradually narrows from the terminal portion toward the mandrel head, and a cylindrical portion having a constant thickness.
  • the jaw (clamping chuck) engages with the conical portion of the blind rivet during the operation of attaching the blind rivet. The jaw fits into the cone of the blind rivet.
  • the jaw also has an entrained edge on the side with respect to the end of the mandrel.
  • the force for fastening the blind rivet is transmitted from the jaws to the mandrel via the cone.
  • the entraining edge engages the terminal portion, and the transmission of the tensile force is improved. Therefore, jaw wear and mandrel material wear are reduced.
  • the outer diameter of the end portion of the mandrel of the blind rivet of Patent Document 2 corresponds to the outer diameter of the mandrel, it can pass through the sleeve. Therefore, it is not necessary to post-process the mandrel after assembling the rivet body and mandrel. Moreover, since it can pass through the nose piece of a rivet fastening device, it is not necessary to divide the nose piece into a plurality of segments in the circumferential direction.
  • the mandrel of the blind rivet of Patent Document 2 has a large-diameter end portion, a tapered cone portion that becomes gradually thinner, a cylindrical portion having a constant thickness, and a mandrel head, and has a shape. It becomes complicated.
  • the tapered cone portion takes time and effort. Since many mandrels are used, the cost increases considerably when the shape is complicated.
  • the entraining edge engages the end of the mandrel, improving force transmission.
  • the entrainment edge is provided as an auxiliary. It is considered that the inclination angle of the outer peripheral surface of the tapered jaw and the inclination angle of the inner peripheral surface of the jaw case are the same. For this reason, the force for tightening the mandrel from the jaw case to the jaw may not be transmitted effectively.
  • JP-A-8-318344 Japanese Patent Laid-Open No. 5-87112
  • An object of the present invention is to provide a blind rivet having a short mandrel and requiring no mandrel processing after assembling the rivet body and the mandrel, and a rivet fastening device capable of easily fastening such a blind rivet. That is.
  • a first aspect of the present invention is a rivet fastening device for fastening a blind rivet comprising a mandrel and a rivet body to a member to be attached, A pull-in portion that grips and pulls in the mandrel shaft of the mandrel; A nose housing for supporting the flange of the rivet body; With The lead-in part is A pulling head that moves in the axial direction; A jaw case that is disposed integrally with the pulling head adjacent to the pulling head and has an inner peripheral surface with a smaller inner diameter toward the front end; A jaw that is disposed within the jaw case and has an outer peripheral surface that contacts the inner peripheral surface of the jaw case; The rivet fastening device is characterized in that an inclination angle of the outer peripheral surface of the jaw is smaller than an inclination angle of the inner peripheral surface of the jaw case.
  • the jaw is composed of two jaw segments, and the dividing groove between the two jaw segments is a narrow narrow groove at the outer peripheral portion of the rear thick portion behind the jaw, and at the outer peripheral portion in front of the rear thick portion. It is preferably a wide groove wider than the narrow groove, and a split groove step portion is provided between the narrow groove and the wide groove.
  • the width of the split groove is wide at the outer periphery of the front of the jaw, the two segments of the jaw can approach each other in the front. Therefore, the mandrel is gripped more strongly by the thin shaft portion and is pulled with a strong frictional force due to the high surface pressure.
  • the jaw has a shaft hole for gripping the mandrel shaft, the front of the shaft hole is a small diameter hole with a small inner diameter, and the rear is a large diameter hole with a large inner diameter. It is preferable that it is an axial center hole step part between diameter holes.
  • the jaw has a shaft hole for gripping the mandrel shaft, a small diameter hole with a small inner diameter in front of the shaft hole, and a large diameter hole with a large inner diameter in the rear, a small diameter hole and a large diameter hole
  • the thin mandrel shaft is placed inside the small-diameter hole of the jaw, and the rear end of the mandrel is placed inside the large-diameter hole of the jaw.
  • the step portion can pull the step between the thin shaft portion and the rear end portion of the mandrel.
  • the mandrel of the blind rivet fastened by the rivet fastening device is composed of a mandrel head at one end and the mandrel shaft extending from the mandrel head.
  • the mandrel shaft includes a column and a rear of the column.
  • a thin shaft portion having an outer diameter thinner than that of the cylindrical portion, and a rear end portion having the same outer diameter as the cylindrical portion behind the thin shaft portion, and between the thin shaft portion and the rear end portion.
  • the thin shaft portion of the mandrel is disposed inside the small diameter hole of the jaw, and the large diameter hole of the jaw It is preferable that the rear end portion of the mandrel is arranged inside the.
  • the mandrel shaft portion has a cylindrical portion, a thin shaft portion having an outer diameter thinner than the cylindrical portion behind the cylindrical portion, and a rear end portion having the same outer diameter as the cylindrical portion behind the thin shaft portion, the rear end portion Since the outer diameter is the same as that of the cylindrical portion, there is no need to process the rear end portion after assembling the rivet body and mandrel.
  • the dimensions of the jaws match the dimensions of the mandrel shaft so that the mandrel's narrow shaft is located inside the jaw's small diameter hole and the mandrel's rear end is located inside the jaw's large diameter hole.
  • the small-diameter hole of the jaw can apply a tensile force to the thin shaft portion of the mandrel, and the large-diameter hole of the jaw can apply a tensile force to the thick shaft portion of the mandrel.
  • the axial hole step portion between the small diameter hole and the large diameter hole pulls the step between the thin shaft portion and the rear end portion. It is preferable.
  • the stepped portion of the jaw comes into contact with the step of the mandrel, so that it is easy to apply a pulling force, and the mandrel is less likely to be plastically deformed than when the mandrel is pulled only by applying a high surface pressure and a frictional force.
  • a second aspect of the present invention is a jaw of a rivet fastening device for fastening a member to be attached by a blind rivet comprising a mandrel and a rivet body,
  • the jaw is composed of two jaw segments, and the dividing groove between the two jaw segments is a narrow narrow groove at the rear thick part at the rear of the jaw, and a wide wide groove at the front taper.
  • the jaw has an axial hole for gripping the mandrel shaft portion of the mandrel, the axial hole being a small diameter hole with a small inner diameter at the front, and a large diameter hole with a large inner diameter at the rear, It is preferable that it is an axial hole step part between the said large diameter holes.
  • a pull-in portion for gripping and pulling a mandrel shaft portion of the mandrel of a rivet fastening device for fastening a blind rivet comprising a mandrel and a rivet body to a member to be attached, ,
  • a pulling head that moves in the axial direction;
  • a jaw case that is disposed integrally with the pulling head adjacent to the pulling head and has an inner peripheral surface with a smaller inner diameter toward the front end;
  • a jaw that is disposed within the jaw case and has an outer peripheral surface that contacts the inner peripheral surface of the jaw case;
  • the pull-in portion is characterized in that an inclination angle of the outer peripheral surface of the jaw is smaller than an inclination angle of the inner peripheral surface of the jaw case.
  • a blind rivet having a short mandrel and requiring no mandrel processing after assembling the rivet body and the mandrel, and a rivet fastening device capable of easily fastening such a blind rivet. be able to.
  • FIG. 6 is a perspective view of a jaw of the rivet fastening device of FIG. 5. It is a front view of the jaw of FIG. It is a left view of the jaw of FIG. It is a right view of the jaw of FIG.
  • FIG. 10 is a cross-sectional view of the jaw of FIG. 7 taken along line AA in FIG. 9. It is an enlarged view of C part of FIG. 8 of the jaw of FIG. It is an enlarged view of B part of FIG. 11 of the jaw of FIG.
  • FIG. 1 is a cross-sectional view of a conventional rivet fastening device 10, which holds a conventional blind rivet 1.
  • the blind rivet 1 includes a rivet body 2 and a mandrel 5.
  • the rivet body 2 includes a cylindrical sleeve 3 and a flange 4 having a larger diameter than the sleeve 3 formed at one end of the sleeve 3.
  • the mandrel 5 includes an elongated cylindrical mandrel shaft portion 6 and a mandrel head 7 formed at one end of the mandrel shaft portion 6. A breakable portion is formed near the mandrel head 7 of the mandrel shaft portion 6.
  • the mandrel shaft portion 6 is formed with a grip portion 8 having a circumferential groove for gripping with the jaws of the rivet fastening device 10.
  • the rivet body 2 and the mandrel 5 are combined, the mandrel head 7 comes into contact with one end of the sleeve 3, and the mandrel shaft 6 extends from the flange 4 long.
  • the front nose of the rivet fastening device 10 includes a nosepiece 11 at the tip and a cylindrical nose housing 13 extending rearward from the nosepiece 11.
  • the distal end portion of the nosepiece 11 has a large outer diameter, and the distal end portion is disposed so as to contact the opening of the nose housing 13.
  • the nosepiece 11 has a central hole formed in the axial direction.
  • the mandrel shaft 6 of the mandrel 5 is received in the center hole.
  • the flange 4 of the rivet body 2 is in contact with the end face of the nosepiece 11.
  • a jaw case 12 is disposed at the inner end portion of the nose housing 13.
  • the jaw case 12 is substantially cylindrical and can slide within the nose housing 13.
  • the inner end of the jaw case 12 has an inner diameter that gradually decreases, and the jaw 14 is accommodated inside the jaw case 12.
  • the jaw 14 is formed in a tapered shape toward the nosepiece 11.
  • the jaw 14 is divided into two to three pieces in the circumferential direction and combined to form a hollow cylindrical body having a hollow axial center, and is accommodated in the tapered cavity of the cylindrical jaw case 12.
  • the jaw 14 receives the mandrel shaft portion 6 of the blind rivet 1 and grips the grip portion 8.
  • the inclination angle of the outer peripheral surface of the jaw 14 to the rear is the same as the inclination angle of the inner peripheral surface 31 of the jaw case 12 to the rear.
  • the outer peripheral surface of the jaw 14 and the inner peripheral surface 31 of the jaw case 12 are closely matched.
  • the substantially cylindrical pulling head 16 and the jaw case lock 17 are disposed outside the nose housing 13 on the rear side of the jaw case 12.
  • a hollow cylindrical jaw pusher 15 is disposed behind the jaw 14 inside the pulling head 16.
  • a jaw pusher spring 18 is disposed between the jaw pusher 15 and the pulling head 16, and presses the jaw pusher 15 forward.
  • the pulling head 16 is fixed to the ball screw shaft 19 behind the pulling head 16.
  • the ball screw shaft 19 is a cylindrical member and extends in the axial direction.
  • the jaw case 12, the pulling head 16, the jaw case lock 17, and the ball screw shaft 19 are arranged with their axial centers aligned with the nose housing 13, and are slidable in the axial direction. These members integrally reciprocate in the axial direction, and the jaws 14 can be retracted to the rear of the nose housing 13 and returned to the front of the nose housing 13.
  • a hollow passage is formed in each of the axial centers of the jaw 14, jaw pusher 15, pulling head 16, and ball screw shaft 19 from the inlet of the nose to the inlet of the recovery container.
  • the mandrel shaft portion 6 is inserted into the axial center portion of the jaw 14.
  • the broken mandrel shaft portion 6 is fed into the collection container through the hollow passage.
  • the ball screw shaft 19 moves straight backward.
  • the pulling head 16, the jaw case lock 17, and the jaw case 12 move rearward together (right direction in FIG. 1).
  • the jaw 14 is applied with a force in the central axis direction on the inclined surface of the tapered portion.
  • the mandrel shaft portion 6 of the pipeline rivet 1 is gripped by the jaw 14 and strongly pulled backward.
  • the mandrel 5 is broken at the broken portion, and the prind rivet 1 is fastened.
  • FIG. 2 is a front view of a blind rivet 20 according to an embodiment of the present invention.
  • FIG. 3 is a front view of the rivet body 22 of the blind rivet 20.
  • FIG. 4 is a front view of the mandrel 25 of the blind rivet 20.
  • a blind rivet 20 includes a rivet body 22 and a mandrel 25.
  • the rivet body 22 includes a cylindrical sleeve 23 and a flange 24 having a larger diameter than the sleeve 23 formed at one end of the sleeve 23.
  • a through hole is formed from the end of the sleeve 23 to the flange 24.
  • the mandrel 25 includes an elongated cylindrical mandrel shaft portion 26 and a mandrel head 27 formed at one end of the mandrel shaft portion 26.
  • the outer diameter of the mandrel head 27 is larger than the inner diameter of the sleeve 23 and is almost equal to the outer diameter of the sleeve 23.
  • a breakable part 26h is formed near the mandrel head 27 of the mandrel shaft part 26, a breakable part 26h is formed.
  • the mandrel shaft portion 26 is formed with a columnar portion 26c and a columnar thin shaft portion 28 having a slightly smaller outer diameter than the columnar portion 26c on the rear end side of the columnar portion 26c.
  • the rear end side of the thin shaft portion 28 is a cylindrical rear end portion 29 having substantially the same outer diameter as the cylindrical portion 26c.
  • a step 28d is formed between the thin shaft portion 28 and the rear end portion 29.
  • the diameter ⁇ c of the cylindrical portion 26c is 3.65 mm
  • the diameter ⁇ n of the thin shaft portion 28 is 3.44 mm
  • the diameter ⁇ e of the rear end portion 29 is 3.64 mm.
  • a step 28d between the thin shaft portion 28 and the rear end portion 29 is 0.1 mm on one side.
  • the rivet body 22 and the mandrel 25 are combined, the mandrel head 27 abuts on one end of the sleeve 23, and the mandrel shaft 26 extends from the flange 24.
  • the outer diameter of the rear end portion 29 is substantially equal to the outer diameter of the mandrel shaft portion 26, and is equal to or slightly smaller than the inner diameter of the sleeve 23.
  • the mandrel shaft portion 26 and the rear end portion 29 can pass through the through hole of the sleeve 23. Therefore, it is not necessary to process the mandrel 25 after the rivet body 22 and the mandrel 25 are assembled.
  • the mandrel shaft portion 26 is inserted into the center hole of the nose housing 33 of the rivet fastening device 30.
  • the flange 24 of the rivet body 22 is in contact with the end surface of the nose housing 33.
  • the rivet body 22 and the mandrel head 27 protrude from the nose housing 33.
  • the thin shaft portion 28 and the rear end portion 29 of the mandrel 25 are gripped by a jaw 40.
  • the jaw case 32 and the jaw 40 are in the forward position.
  • the mandrel shaft portion 26 is inserted into the axial hole of the jaw 40 and gripped.
  • the front direction (left side in FIG. 5) of the nose of the rivet fastening device 30 is referred to as the front
  • the rear direction of the nose is referred to as the rear.
  • a rivet fastening device 30 according to an embodiment of the present invention will be described with reference to FIG.
  • a front of the rivet fastening device 30 is a nose housing 33.
  • the nosepiece does not exist as an independent part, and the tip of the nose housing 33 functions as a nosepiece.
  • the rear end portion 29 of the mandrel 25 has substantially the same thickness as the mandrel shaft portion 26 and can pass through the central hole at the front end portion of the nose housing 33. Therefore, the tip of the nose housing 33 need not be divided into a plurality of segments.
  • a center hole is formed in the tip of the nose housing 33 in the axial direction, and the mandrel shaft part 26 of the mandrel 25 is received in the center hole.
  • a jaw case 32 is disposed at the inner tip of the nose housing 33.
  • the rear part of the jaw case 32 is substantially cylindrical.
  • the outer shape of the tip end side of the jaw case 32 is tapered to match the shape of the cavity inside the nose housing 33.
  • the jaw case 32 can slide in the nose housing 33.
  • the inner shape of the distal end side of the jaw case 32 is gradually tapered, and the tapered jaw 40 can be accommodated in the cavity inside the jaw case 32.
  • the jaw 40 is formed in a tapered shape toward the tip of the nose housing 33.
  • the jaw 40 is divided into two pieces in the circumferential direction and combined to form an axial hole in the axial center portion, and is accommodated in the tapered cavity of the cylindrical jaw case 32.
  • the jaw 40 is pressed forward in the tapered jaw case 32 by a jaw pusher 35 and a jaw pusher spring 38.
  • the jaw 40 receives and grips the mandrel shaft portion 26 of the blind rivet 20 in the shaft hole.
  • the jaw 40 and the jaw case 32 of the rivet fastening device 30 according to the embodiment of the present invention have a special shape as will be described later.
  • a substantially cylindrical pulling head 36 and a jaw case lock 37 are disposed outside the nose housing 33 and behind the jaw case 32, respectively.
  • a hollow cylindrical jaw pusher 35 is disposed inside the pulling head 36 and behind the jaw 40.
  • a jaw pusher spring 38 is disposed between the jaw pusher 35 and the pulling head 36, and presses the jaw pusher 35 forward.
  • the pulling head 36 is fixed to a ball screw shaft 39 behind the pulling head 36.
  • the ball screw shaft 39 is a cylindrical member and extends in the axial direction.
  • a hollow passage is formed in the axial center of the ball screw shaft 39.
  • the jaw case 32, the pulling head 36, the jaw case lock 37, and the ball screw shaft 39 are arranged in a state where the shaft centers are aligned with the nose housing 33, and are slidable in the axial direction. These members integrally reciprocate in the axial direction, and the jaw 40 can be retracted to the rear position behind the nose housing 33 and returned to the front position forward of the nose housing 33.
  • a hollow passage is formed in the axial center of each of the jaw pusher 35, the pulling head 36, and the ball screw shaft 39 up to the rear collection container (not shown).
  • the mandrel shaft portion 26 can be inserted into the axial hole of the jaw 40.
  • the broken mandrel shaft portion 26 is fed into the collection container through the hollow passage.
  • the jaw 40 can pull the narrow step 28d of the mandrel 25 and can grip the thin shaft portion 28 of the mandrel 25 with high surface pressure.
  • the thin shaft portion 28 and the rear end portion 29 are not deformed by the surface pressure of the jaw 40 before the breakable portion 26h of the mandrel 25 breaks.
  • FIG. 6 is a sectional view of only the jaw 40 and the jaw case 32 of FIG. 5, and the jaw 40 and the jaw case 32 are in the forward position. Other parts of the rivet fastening device 30 are not shown.
  • the inclination angle ⁇ j of the outer peripheral surface 41 of the jaw 40 is smaller than the inclination angle ⁇ c of the inner peripheral surface 31 of the jaw case 32.
  • the inclination angle ⁇ c of the inner peripheral surface 31 of the jaw case 32 is an angle formed by the lines of the two inner peripheral surfaces 31 of the jaw case 32 in a cross section passing through the central axis in FIG.
  • the inclination angle ⁇ j of the outer peripheral surface 41 of the jaw 40 is an angle formed by the lines of the two outer peripheral surfaces 41 of the jaw 40 in a cross section passing through the central axis in FIG.
  • the outer peripheral surface 41 of the jaw 40 is in close contact with the inner peripheral surface 31 of the jaw case 32 in the tapered portion 42 of the jaw 40, and the outer peripheral surface 41 of the jaw 40 is in the inner portion of the jaw case 32 in the rear thick portion 43.
  • a minute gap is created from the peripheral surface 31.
  • the inclination angle ⁇ c of the inner peripheral surface 31 of the jaw case 32 is 20 °
  • the inclination angle ⁇ j of the outer peripheral surface 41 of the jaw 40 is 18 °.
  • the outer peripheral surface 41 of the jaw 40 When fastening the blind rivet 20, the outer peripheral surface 41 of the jaw 40 is pulled rearward (to the right in FIG. 6) by the inner peripheral surface 31 of the jaw case 32. Since the inclination angle ⁇ j of the outer peripheral surface 41 of the jaw 40 is smaller than the inclination angle ⁇ c of the inner peripheral surface 31 of the jaw case 32, the force with which the inner peripheral surface 31 of the jaw case 32 presses the outer peripheral surface 41 of the jaw 40 is It becomes larger at the front detail (left side in FIG. 6) than the rear thick part 43.
  • the jaw 40 and the jaw case 32 are in a forward position before the blind rivet 20 is fastened.
  • the mandrel shaft portion 26 of the blind rivet 20 is inserted into the center hole of the nose housing 33 of the rivet fastening device 30.
  • the flange 24 of the rivet body 22 is in contact with the end surface of the nose housing 33.
  • the mandrel shaft portion 26 Since the thin shaft portion 28 of the mandrel shaft portion 26 is located inside the tapered portion 42 of the jaw 40, the mandrel shaft portion 26 is gripped more strongly by the thin shaft portion 28 than the rear end portion 29. The mandrel shaft portion 26 is pulled with a strong frictional force due to a high surface pressure. Further, as will be described later, the step 28d of the mandrel shaft portion 26 is strongly pulled by the axial hole step portion 46d of the jaw 40.
  • FIG. 7 is a perspective view of the jaw 40
  • FIG. 8 is a front view
  • FIG. 9 is a left side view
  • FIG. 10 is a right side view.
  • FIG. 11 is a sectional view taken along line AA in FIG. 12 is an enlarged view of a portion C in FIG. 8, and
  • FIG. 13 is an enlarged view of a portion B in FIG.
  • the jaw 40 is divided into two upper and lower segments.
  • the outer peripheral surface 41 of the jaw 40 is thinner as it is closer to the tip, and the tip has a tapered portion 42.
  • the rear end is a rear thick portion 43.
  • the split groove 45 of the jaw 40 has a width w1. It is a narrow narrow groove 45n.
  • the dividing groove 45 is a wide groove 45w having a width w2.
  • a split groove step 45d is provided between the narrow groove 45n and the wide groove 45w.
  • the dividing groove step portion 45d is from the rear thick portion 43. That is, the axial length of the narrow groove 45n is shorter than the axial length of the wide groove 45w. Width w1 of narrow groove 45n ⁇ width w2 of wide groove 45w
  • the narrow groove 45n has the same width from the front end portion to the split groove step portion 45d
  • the wide groove 45w has the same width from the split groove step portion 45d to the rear end portion.
  • the taper 42 in front of the jaw 40 (left side of FIG. 6) is wide in the split groove 45, so that the taper 42 of the two segments of the jaw 40 You can get closer.
  • the tapered portions 42 of the jaws 40 are closer to each other.
  • the thin shaft portion 28 of the mandrel 25 is located inside the tapered portion 42 of the jaw 40, so that the thin shaft portion 28 is pulled with a strong frictional force due to a high surface pressure.
  • FIG. 11 which is a sectional view taken along line AA in FIG. 9 and FIG. 13 which is an enlarged view of a portion B in FIG. 11, the jaw 40 grips the mandrel, so It has become.
  • the axial hole Near the front tapered portion 42 (left side in FIG. 11) of the jaw 40, the axial hole is a small-diameter hole 46s having a small inner diameter, and near the rear thick portion 43 (right side in FIG. 11) behind the jaw 40,
  • the shaft hole is a large-diameter hole 46b having a large inner diameter.
  • the boundary between the small diameter hole 46s and the large diameter hole 44b is an axial hole step 46d.
  • the inner diameter of the small diameter hole 46s is smaller than the inner diameter of the large diameter hole 46b.
  • the inner diameter of the small diameter hole 46s is constant from the tip 42 (front end) to the axial hole step 46d, and the inner diameter of the large diameter hole 44b is the axial hole step. It is constant from 46d to the rear thick part 43 (rear end part).
  • the inner diameter of the small-diameter hole 46s is 3.2 mm
  • the inner diameter of the large-diameter hole 46b is 3.6 mm
  • the axial hole step 46d is 0.2 mm on one side.
  • the thin shaft portion 28 of the mandrel 25 is arranged inside the small diameter hole 46s of the jaw 40, and the rear end portion of the mandrel 25 is inside the large diameter hole 46b of the jaw 40. 29 are arranged.
  • the small diameter hole 46 s of the jaw 40 abuts on the thin shaft portion 28 of the mandrel 25, and the large diameter hole 46 b of the jaw 40 abuts on the rear end portion 29 of the mandrel 25.
  • the axial hole step 46d of the jaw 40 comes into contact with the step 28d of the mandrel 25, so that it is easy to apply a pulling force to the mandrel 25.
  • the width of the stepped portion 46d of the jaw 40 and the stepped portion 28d of the mandrel 25 is very narrow, it is necessary to apply sufficient surface pressure to the narrow shaft portion 28 of the mandrel 25 with the small diameter hole 46s of the jaw 40. is there.
  • the jaw 40 applies a tensile force to the step 28d and simultaneously applies a high surface pressure to the thin shaft portion 28. Therefore, the step 28d is not deformed, and the thin shaft portion 28 and the rear end portion 29 can be prevented from being plastically deformed by a high surface pressure.
  • the inclination angle ⁇ j of the outer peripheral surface 41 of the jaw 40 is smaller than the inclination angle ⁇ c of the inner peripheral surface 31 of the jaw case 32.
  • the split groove 45 of the jaw 40 is narrow with a width w1 in the rear thick portion 43 of the jaw 40, and wider on the left side with a width w2. Therefore, the mandrel shaft portion 26 is gripped more strongly than the rear end portion 29 by the thin shaft portion 28, and is pulled with a strong frictional force due to a high surface pressure.
  • the jaw 40 is a small-diameter hole 46s having a small inner diameter on the front end side, and a large-diameter hole 46b having a large inner diameter on the rear end side.
  • An axial hole step 46d is formed between the small diameter hole 46s and the large diameter hole 46b.
  • the axial hole step 46d of the jaw 40 abuts on the step 28d of the mandrel 25, and the mandrel 25 can be pulled. Since the jaw 40 pulls the step 28d of the mandrel 25 and simultaneously applies high surface pressure to the thin shaft portion 28 and the rear end portion 29 of the mandrel 25 and pulls the mandrel 25 with a frictional force, the step 28d and the thin shaft portion 28 of the mandrel 25 are pulled. Can be prevented from plastic deformation.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Insertion Pins And Rivets (AREA)
PCT/JP2018/004340 2017-02-21 2018-02-08 リベット締結装置 WO2018155204A1 (ja)

Applications Claiming Priority (2)

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JP2017-030149 2017-02-21
JP2017030149A JP2018134656A (ja) 2017-02-21 2017-02-21 リベット締結装置

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112460113A (zh) * 2019-09-09 2021-03-09 宾科精密部件(中国)有限公司 用于多个板材连接用的连接机构及方法
CN117181984A (zh) * 2023-09-06 2023-12-08 浙江新特立汽车电器有限公司 一种电磁开关动铁芯的压铆冲压设备

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111396428A (zh) * 2020-04-14 2020-07-10 眉山中车紧固件科技有限公司 一种单槽单面紧固件及其安装方法

Citations (3)

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Publication number Priority date Publication date Assignee Title
JPH0460341U (zh) * 1990-09-20 1992-05-25
JP3146383U (ja) * 2008-09-02 2008-11-13 黄鼎鈞 リベットガン固定機構造
JP2010260064A (ja) * 2009-04-30 2010-11-18 Nippon Pop Rivets & Fasteners Ltd ブラインドリベット締結装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0460341U (zh) * 1990-09-20 1992-05-25
JP3146383U (ja) * 2008-09-02 2008-11-13 黄鼎鈞 リベットガン固定機構造
JP2010260064A (ja) * 2009-04-30 2010-11-18 Nippon Pop Rivets & Fasteners Ltd ブラインドリベット締結装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112460113A (zh) * 2019-09-09 2021-03-09 宾科精密部件(中国)有限公司 用于多个板材连接用的连接机构及方法
CN117181984A (zh) * 2023-09-06 2023-12-08 浙江新特立汽车电器有限公司 一种电磁开关动铁芯的压铆冲压设备
CN117181984B (zh) * 2023-09-06 2024-05-03 浙江新特立汽车电器有限公司 一种电磁开关动铁芯的压铆冲压设备

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