EP2502686A1 - Blindnietbefestigungsvorrichtung - Google Patents

Blindnietbefestigungsvorrichtung Download PDF

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Publication number
EP2502686A1
EP2502686A1 EP12160507A EP12160507A EP2502686A1 EP 2502686 A1 EP2502686 A1 EP 2502686A1 EP 12160507 A EP12160507 A EP 12160507A EP 12160507 A EP12160507 A EP 12160507A EP 2502686 A1 EP2502686 A1 EP 2502686A1
Authority
EP
European Patent Office
Prior art keywords
blind rivet
jaw
mandrel
fastening device
nose piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP12160507A
Other languages
English (en)
French (fr)
Inventor
Daisuke Mori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Newfrey LLC
Original Assignee
Newfrey LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Newfrey LLC filed Critical Newfrey LLC
Publication of EP2502686A1 publication Critical patent/EP2502686A1/de
Withdrawn legal-status Critical Current

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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
    • B21J15/02—Riveting procedures
    • B21J15/04—Riveting hollow rivets mechanically
    • B21J15/043—Riveting hollow rivets mechanically by pulling a mandrel
    • 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
    • B21J15/105—Portable riveters
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/53709—Overedge assembling means
    • Y10T29/53717—Annular work
    • Y10T29/53726—Annular work with second workpiece inside annular work one workpiece moved to shape the other
    • Y10T29/5373—Annular work with second workpiece inside annular work one workpiece moved to shape the other comprising driver for snap-off-mandrel fastener; e.g., Pop [TM] riveter

Definitions

  • the present invention relates to a blind rivet fastening device and, more specifically, to a nose piece at the front end of a blind rivet fastening device.
  • a blind rivet fastening device includes a hollow nose housing for accepting a blind rivet, a nose piece provided on the front end of the nose housing and having a rivet insertion port for inserting the mandrel of a blind rivet, a jaw case provided adjacent to the rear of the nose piece so as to be able to move forward and rearward inside the nose housing and having an inner circumferential surface formed so the inner diameter becomes smaller towards the front end, a jaw provided inside the jaw case so as to hold the mandrel of a blind rivet inserted into the port and having an outer circumferential surface slidably contacting the inner circumferential surface of the jaw case, and a jaw pusher provided adjacent to the rear of the jaw and inside the nose housing for applying pressure to the jaw in the forward direction.
  • the mandrel of the blind rivet is inserted into an insertion port in the nose piece of the fastening device so that the rivet body pushes out from the nose piece.
  • the fastening device is positioned so as to insert the rivet body into a mounting hole in the component-to-be-fastened, and the fastening device is operated to forcibly pull out the mandrel until it ruptures.
  • the expanded and deformed sleeve of the rivet body fastens the blind rivet to the component-to-be-fastened.
  • the ruptured mandrel is discharged to the rear of the blind rivet fastening device and is collected in a collector.
  • the jaw case then returns to its starting position to load the next blind rivet.
  • the ruptured mandrel is held by the jaw and a portion of the mandrel sometimes sticks out from the nose piece.
  • the ruptured mandrel is suctioned and discharged to the rear using pneumatic pressure.
  • a holding means is proved to keep an inserted rivet from falling out.
  • the rivet holding means ordinarily uses suction from pneumatic pressure. However, this is not economical because pneumatic pressure is needed between holding operations. In an electric fastening device, it is difficult to generation suction force, so another method has to be used to perform the holding operation.
  • One prior art means of holding a rivet is to attach an elastic ring able to elastically hold a blind rivet slidably along its center line in the blind rivet insertion port of the nose piece (cf. JP 06262290 A ).
  • Another means of holding a rivet is to provide an engaging means for coming into contact with the mandrel of the inserted rivet and engaging the mandrel of the rivet.
  • This engaging means is composed of an insertion hole provided to as to reach the insertion port from the outer circumferential surface of the nose piece, a bolt inserted into the insertion hole, and an elastic ring for pressing against the head of the bolt (cf. JP 2008168324 A ).
  • Another means of holding a rivet is to suction and hold a rivet using pneumatic pressure (cf. JP 55038603 U ).
  • the elastic ring applies elastic force perpendicularly to the center line of the blind rivet from the outer circumferential surface of the nose piece to the insertion port.
  • the elastic force applied to the blind rivet to move it in the insertion direction is the same as the elastic force applied to the blind rivet to move it in the direction opposite that of the insertion direction. Therefore, it can hold the rivet during insertion but cannot keep the mandrel from sticking out after fastening.
  • the elastic force is increased to keep the mandrel from sticking out, it becomes difficult to insert a rivet.
  • the rivet holding means as described in JP 55038603 U is uneconomical because it uses pneumatic pressure to suction and hold a rivet.
  • the object of the prior art documents is simply to hold a rivet. It is not to keep it from sticking out.
  • a simple rivet holding function is provided, complications occur because the mandrel sticks out after fastening. When held with the mandrel sticking out, it is difficult to load the next rivet.
  • an object of the present invention is to provide a blind rivet fastening device which makes it easy to insert a blind rivet in a nose piece, keep the inserted blind rivet from falling out before fastening, and prevent the ruptured mandrel from sticking out of the nose piece after fastening.
  • the present invention provides a blind rivet fastening device comprising a hollow nose housing for accepting a blind rivet, a nose piece provided on the front end of the nose housing and having an insertion port for inserting the mandrel of a blind rivet, a jaw case provided adjacent to the rear of the nose piece so as to be able to move forward towards the nose piece and rearward towards the inside in the nose housing and having an inner circumferential surface formed in a way that the inner diameter becomes smaller towards the front end, a jaw provided inside the jaw case so as to hold the mandrel of a blind rivet inserted into the insertion port and having an outer circumferential surface slidably contacting the inner circumferential surface of the jaw case, and a jaw pusher provided adjacent to the rear of the jaw and inside the nose housing for applying pressure to the jaw in the forward direction, wherein rearward movement of the jaw case with respect to the insertion port narrows inner diameter of the jaw for grasping the mandrel of the blind rivet in the jaw, and rearward movement of the
  • the blind rivet fastening device further comprises a hole provided in an inner wall forming the insertion port of the nose piece, an engaging means housed inside the hole, and a pressure-applying means for elastically pushing the engaging means towards the inner wall of the nose piece and causing a portion of the engaging means to protrude from the inner wall into the insertion port, wherein the hole extends from the inner wall towards an outer wall of the nose piece and rearward obliquely with respect to the insertion port, and the front end of the hole opening into the insertion port is formed narrowly so the engaging means protruding into the port does not fall out.
  • the engaging means can be a spherical component, a cylindrical component, or a bolt-shaped component.
  • the pressure-applying means can be an elastic ring or a spring.
  • the elastic ring can be an O-ring.
  • the hold accommodating the engaging means extends from the inner wall of the nose piece towards the outer wall and rearward obliquely with respect to the rivet insertion port.
  • the engaging means can be easily moved rearward obliquely by the tip of the mandrel in the blind rivet moving in the insertion direction.
  • movement of the mandrel is substantially prevented by the engaging means.
  • the force needed by the mandrel to push up the engaging means after fastening is greater than the force needed by the inserted mandrel to push up the engaging means.
  • the present invention allows for the easy insertion of the blind rivet into the nose piece, and can hold the inserted blind rivet so that it does not fall out of the fastening device. Because the force needed by the mandrel to push up the engaging means after fastening is greater than the force needed by the mandrel held in the jaw to open the jaw, the mandrel is kept from sticking out of the nose piece after fastening. When the jaw has bitten into the mandrel and the force needed to open the jaw has become excessive, a large force applied from the mandrel to the engaging means can move the engaging means inside the hole rearward obliquely. The mandrel can then push up the engaging means after fastening. As a result, the fastening device does not break because the mandrel is sticking out from the nose piece after fastening.
  • FIG 1 is a cross-sectional diagram showing the entire blind rivet fastening device in an embodiment of the present invention.
  • FIG 2 and FIG 3 are enlarged cross-sectional views showing the front end portion of the blind rivet fastening device in FIG 1 .
  • a nose housing 2 is provided at the front end of the blind rivet fastening device 1 to accept a blind rivet
  • a nose piece 3 is provided at the front end of the nose housing 2.
  • the nose piece 3 has an insertion port 6 for inserting the mandrel 5 of the blind rivet 4.
  • the blind rivet 4 is composed of a rivet body 4a and a mandrel 5.
  • the nose piece 3 is configured so that only the mandrel 5 is received in the insertion port 6.
  • a jaw case 7 provided adjacent to the rear of the nose piece 3 inside the jaw housing 2.
  • the jaw case 7 is able to slide forward and rearward and has an inner circumferential surface formed in a way that the inner diameter becomes smaller towards the front end.
  • a jaw 8 is provided inside the jaw case 7 to grasp the mandrel 5 of the blind rivet 4 inserted into the insertion port 6 of the nose piece 3.
  • the jaw 8 has an outer peripheral surface slidably contacting the inner circumferential surface of the jaw case 7.
  • a jaw pusher 9 is provided adjacent to the rear of the jaw 8 inside the jaw housing 2. The jaw pusher 9 pushes the jaw 8 in the forward direction, so the jaw 8 comes into contact with the inner peripheral surface of the jaw case 7.
  • a hole 10 is provided in the inner wall forming the insertion port 6 in the nose piece 3, and a steel ball 11 is accommodated in this hole.
  • a ring-shaped groove 13 is provided in the outer wall of the nose piece, and a portion of the groove 13 crosses the hole 10.
  • An O-ring 12 is provided in the groove 13, and the O-ring 12 elastically pushes the steel ball 11 from the outer wall towards the inner wall. Some of the steel ball 11 protrudes from the inner wall into the insertion hole.
  • the hole 10 extends from the inner wall towards the outer wall and rearward obliquely with respect to the insertion port. In this configuration, when the steel ball 11 is pushed up by the mandrel 5 of the blind rivet 4, it can move rearward obliquely inside the hole as indicated by arrow B.
  • blind rivet fastening device in an embodiment of the present invention, which will also be compared with a pneumatic-hydraulic blind rivet fastening device of the prior art.
  • FIG 4 and FIG 5 are partial cross-sectional views similar to FIG 2 used to explain, respectively, a blind rivet fastening device in an embodiment of the present invention and a pneumatic-hydraulic blind rivet fastening device of the prior art.
  • FIG 4 and FIG 5 show the blind rivet fastening device, respectively, in its starting position before a blind rivet has been inserted, after the blind rivet has been inserted, while the blind rivet is being fastened, after the device has returned to its starting position for the next fastening operation, and after the mandrel has been discharged.
  • the blind rivet fastening device in an embodiment of the present invention will be explained.
  • FIG 4 (A) the blind rivet fastening device is in its starting position.
  • the jaw case 7 In the starting position, the jaw case 7 is forward in the jaw housing 2 in order to allow for easy insertion of a blind rivet.
  • the jaw 8 is pushed to the rear of the nose piece 3 and cannot move forward, and the inner diameter of the jaw 8 becomes larger.
  • the steel ball 11 is elastically pressed by the O-ring 12, and a portion of the steel ball protrudes into the insertion port 6 in the nose piece 3.
  • FIG 4 (B) the mandrel 5 of the blind rivet 4 is inserted into the insertion port 6, and the mandrel 5 is received by the jaw 8 where the inner diameter has been widened.
  • the steel ball 11 is pushed up by the inserted mandrel 5, and the steel ball 11 moves inside the wall, as indicated by arrow C, obliquely rearward from the inner wall of the nose piece 3 towards the outer wall.
  • the steel ball 11 can move forward obliquely.
  • the mandrel 5 can be inserted using light force. Because elastic force is applied by the O-ring to the steel ball 11, the inserted mandrel 5 is held by the steel ball 11.
  • FIG 4 (C) the jaw case 7 is driven rearward. Because the inner diameter of the jaw 8 becomes smaller, the jaw 8 holds the mandrel 5.
  • the mandrel 5 is pulled in the direction of arrow D, the sleeve of the rivet body is expanded and deformed, and the mandrel 5 is ruptured after the blind rivet 4 has been fastened in the component-to-be-fastened.
  • the steel ball 11 returns to the position shown in FIG 4 (A) , and a portion of the steel ball 11 protrudes into the insertion port 6.
  • FIG 4 (D) the jaw case 7 moves forward as indicated by arrow E in order to perform the next fastening operation.
  • the ruptured mandrel 5 held by the jaw 8 moves forward, and comes into contact with the steel ball 11 protruding into the insertion port 6. Because the force needed for the mandrel to push up the steel ball 11 is greater than the force needed for the mandrel 5 grasped in the jaw 8 to open the jaw 8, forward movement by the mandrel 5 is prevented by the steel ball 11 and it is pushed back as indicated by arrow F in relation to the jaw 8 and the jaw case 7.
  • FIG 4 (E) the insertion of the next blind rivet 4 pushes the ruptured mandrel 5 to the rear, and the steps in FIG 4 (B) through FIG 4 (E) are repeated.
  • FIG 5 (A) the blind rivet fastening device is in its starting position. In the starting position, the jaw case 7 is forward, the jaw 8 presses against the rear end of the nose piece, and the inner diameter of the jaw 8 is larger.
  • FIG 5 (B) the mandrel 5 of the blind rivet 4 is inserted into the insertion port 6, and the mandrel 5 is received by the jaw 8 where the inner diameter has been widened.
  • the blind rivet 4 is inserted in this state, and the inserted rivet 5, unlike FIG 4 (B) , is held inside the insertion port 6 by suction generated using pneumatic pressure.
  • FIG 5 (C) the jaw case 7 is driven rearward. Because the inner diameter of the jaw 8 becomes smaller, the jaw 8 holds the mandrel 5.
  • the mandrel 5 is pulled in the direction of arrow D, the sleeve of the rivet body is expanded and deformed, and the mandrel 5 is ruptured after the blind rivet 4 has been fastened in the component-to-be-fastened.
  • FIG 5 (E) the jaw case 7 moves forward to the starting position shown in FIG 5 (A) .
  • the jaw 8 is in the rear portion of the nose piece, the inner diameter increases, and the mandrel 5 departs from the jaw 8.
  • the sticking out mandrel 5, unlike FIG 4 (E) is moved to the rear and discharged by suction using the pneumatic pressure.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Insertion Pins And Rivets (AREA)
EP12160507A 2011-03-23 2012-03-21 Blindnietbefestigungsvorrichtung Withdrawn EP2502686A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2011063624A JP2012196702A (ja) 2011-03-23 2011-03-23 ブラインドリベット締結装置

Publications (1)

Publication Number Publication Date
EP2502686A1 true EP2502686A1 (de) 2012-09-26

Family

ID=45932152

Family Applications (1)

Application Number Title Priority Date Filing Date
EP12160507A Withdrawn EP2502686A1 (de) 2011-03-23 2012-03-21 Blindnietbefestigungsvorrichtung

Country Status (5)

Country Link
US (1) US20120240371A1 (de)
EP (1) EP2502686A1 (de)
JP (1) JP2012196702A (de)
CN (1) CN102688973A (de)
TW (1) TW201244848A (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018129118A1 (de) 2018-11-20 2020-05-20 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Werkzeug zum Verriegeln eines Spreiznietes und seine Verwendung
EP3838438A1 (de) * 2019-12-17 2021-06-23 Techtronic Cordless GP Halter für arbeitselement

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103335628B (zh) * 2013-07-05 2016-08-17 中北大学 一种圆筒坯料变形量的测量装置
EP2985093B1 (de) 2014-08-15 2019-05-29 GESIPA Blindniettechnik GmbH Blindnietsetzgerät und Verfahren zum Setzen eines Blindniets
CN108421949B (zh) * 2018-03-21 2019-10-25 季程康 一种铝合金加工用铆钉自动安装装置
TWI656923B (zh) * 2018-07-24 2019-04-21 朝程工業股份有限公司 電動拉釘槍
JP7264445B2 (ja) * 2019-03-05 2023-04-25 株式会社ロブテックス リベッター
WO2021247876A1 (en) 2020-06-03 2021-12-09 Milwaukee Electric Tool Corporation Rivet setting tool
EP4230325A1 (de) * 2022-02-22 2023-08-23 Black & Decker, Inc. Blindnietsetzgerät

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US751345A (en) * 1904-02-02 Drill-chuck
JPS5538603U (de) 1978-08-30 1980-03-12
US4375760A (en) * 1979-09-07 1983-03-08 Aerpat A.G. Anvil for riveting tool
JPH06262290A (ja) 1993-03-16 1994-09-20 Oputo Eng Kk リベッターにおけるノーズピース部の構造
JP2008168324A (ja) 2007-01-12 2008-07-24 Nakabohtec Corrosion Protecting Co Ltd リベット締結装置

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3543560A (en) * 1968-01-04 1970-12-01 Olin Mathieson Rivet tool
US4648259A (en) * 1985-08-22 1987-03-10 Usm Corporation Adjustable nose piece
US4691552A (en) * 1986-01-13 1987-09-08 Peterson Richard B Head for blind rivet installation tools
US5960667A (en) * 1997-12-23 1999-10-05 Emhart Inc. Ball device for setting blind riverts

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US751345A (en) * 1904-02-02 Drill-chuck
JPS5538603U (de) 1978-08-30 1980-03-12
US4375760A (en) * 1979-09-07 1983-03-08 Aerpat A.G. Anvil for riveting tool
JPH06262290A (ja) 1993-03-16 1994-09-20 Oputo Eng Kk リベッターにおけるノーズピース部の構造
JP2008168324A (ja) 2007-01-12 2008-07-24 Nakabohtec Corrosion Protecting Co Ltd リベット締結装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102018129118A1 (de) 2018-11-20 2020-05-20 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Werkzeug zum Verriegeln eines Spreiznietes und seine Verwendung
EP3838438A1 (de) * 2019-12-17 2021-06-23 Techtronic Cordless GP Halter für arbeitselement

Also Published As

Publication number Publication date
US20120240371A1 (en) 2012-09-27
CN102688973A (zh) 2012-09-26
JP2012196702A (ja) 2012-10-18
TW201244848A (en) 2012-11-16

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