EP0104360A2 - Outil d'enfoncement électromagnétique - Google Patents

Outil d'enfoncement électromagnétique Download PDF

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Publication number
EP0104360A2
EP0104360A2 EP83107492A EP83107492A EP0104360A2 EP 0104360 A2 EP0104360 A2 EP 0104360A2 EP 83107492 A EP83107492 A EP 83107492A EP 83107492 A EP83107492 A EP 83107492A EP 0104360 A2 EP0104360 A2 EP 0104360A2
Authority
EP
European Patent Office
Prior art keywords
hollow cylinder
plunger
valve flap
wrapping device
wrapping
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.)
Granted
Application number
EP83107492A
Other languages
German (de)
English (en)
Other versions
EP0104360B1 (fr
EP0104360A3 (en
Inventor
Fritz Dipl.-Ing. Schädlich
Werner Dipl.-Ing. Rieker
Rainer Thaler
Klaus Klingenstein
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0104360A2 publication Critical patent/EP0104360A2/fr
Publication of EP0104360A3 publication Critical patent/EP0104360A3/de
Application granted granted Critical
Publication of EP0104360B1 publication Critical patent/EP0104360B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/06—Hand-held nailing tools; Nail feeding devices operated by electric power

Definitions

  • the invention is based on a wrapping device according to the type of the main claim.
  • Such an impact device is already known, in which, after the tappet has been hammered in, a spring is used to return it to its starting position.
  • a rubber buffer catches the returning plunger at the end of its return.
  • This has the disadvantage that the energy stored when the plunger is intercepted by the rubber buffer often throws the plunger back so far in its working direction that an impact knife connected to it detaches the next available fastening means from the magazine and transports it a little way into the guide channel to the impact point. Only then does the tappet come to rest in its end position on the rubber buffer.
  • the impact knife releases another fastener from the magazine, which strikes the fastener already in the guide channel. This is how malfunctions are caused.
  • a buffer system intended to destroy excess impact energy according to EU patent application 0054782 could possibly remedy this.
  • This buffer system is relatively complex, takes up a lot of space and wears out relatively quickly. This makes it necessary to replace the buffer element, which also requires appropriate structural precaution and careful maintenance of the device.
  • the wrapping device according to the invention with the characterizing features of the main claim has the advantage that its air damper is simply the same in construction and in life as the other components of the device. In addition, less space is required for this air damper.
  • the combination of the air damper with the check valve ensures an ideal working cycle of undamped impact movement and damped return stroke.
  • the measures listed in the subclaims permit advantageous developments and improvements of the wrapping device specified in the main claim.
  • the design of the air damper as a tappet guide is particularly advantageous. This saves additional guide parts.
  • the design with a hollow cylinder onto which a cup-shaped tappet is pushed results in an ideal damping characteristic with a damping effect that increases towards the end of the return stroke movement.
  • FIG. 1 An embodiment of the subject of the invention is shown in the drawing and explained in more detail in the following description.
  • the figure shows a longitudinal cut through an impact device according to the invention.
  • a coil 2 is arranged through the cylindrical interior 3 of which a cup-shaped tappet 4 and a pusher knife 5 fixedly connected thereto are displaceably guided.
  • the plunger 4 is additionally axially displaceable on a hollow cylinder 6.
  • the widened base 7 of the hollow cylinder 6 is firmly connected to the device housing 1.
  • An opening 8 in the device housing 1 connects the interior of the hollow cylinder 6 with the outside air.
  • a valve flap 9 is fastened in such a way that it allows air flowing in from the outside to pass freely, but prevents the air from escaping from the housing.
  • the space around the plunger 4 is also vented to the outside, which is represented by an opening 10 in the device housing 1.
  • a conical coil spring 11 is supported against a spring ring 12 at the end of the plunger 4 and a washer 13 slid onto the plunger 4 in front of it.
  • the abutment for this helical spring 11 is formed by a rib 14 of the device housing 1.
  • the lower end of the impact knife 5 in the drawing is guided in a guide channel 15.
  • a magazine guide 16 for a fastener magazine 17 leads at right angles to the guide channel 15.
  • a fastening means is introduced into the guide channel 15 in front of the butt knife 5.
  • the tappet 4 When a voltage pulse is applied to the coil 2, the tappet 4 is quickly drawn into the interior 3 of the coil by the resulting magnetic field (arrow 18).
  • the butt knife 5 is moved through the guide channel 15, detaches a fastener from the fastener magazine 17 and drives it into a workpiece lying in front of the end of the guide channel 15.
  • the tappet 4 sucked in outside air through the opening 8 and the interior of the hollow cylinder 6, the valve flap 9 allowing this outside air to enter unhindered.
  • the impact movement was therefore not hindered by the air damper formed from the plunger 4 and the hollow cylinder 6.
  • the magnetic field which collapses at the end of the voltage pulse releases the plunger 4 again, so that it can be moved back into its starting position under the action of the helical spring 11.
  • the air in the interior of the plunger 4 is slowly pressed through a throttle gap 19 formed between the plunger 4 and the hollow cylinder 6, because the valve flap 9, which now closes the interior of the hollow cylinder 6, does not permit unhindered escape of the air to the outside.
  • the return stroke movement in the direction of an arrow 20 is damped and prevents the plunger 4 from rebounding from its contact surface on the base 7 of the hollow cylinder 6. This ensures that the wrapping device functions properly.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Magnetically Actuated Valves (AREA)
EP83107492A 1982-08-28 1983-07-29 Outil d'enfoncement électromagnétique Expired EP0104360B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3232120 1982-08-28
DE19823232120 DE3232120A1 (de) 1982-08-28 1982-08-28 Elektromagnetisch betriebenes einschlaggeraet

Publications (3)

Publication Number Publication Date
EP0104360A2 true EP0104360A2 (fr) 1984-04-04
EP0104360A3 EP0104360A3 (en) 1985-07-03
EP0104360B1 EP0104360B1 (fr) 1987-10-28

Family

ID=6171976

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83107492A Expired EP0104360B1 (fr) 1982-08-28 1983-07-29 Outil d'enfoncement électromagnétique

Country Status (5)

Country Link
US (1) US4515303A (fr)
EP (1) EP0104360B1 (fr)
JP (1) JPS5959361A (fr)
BR (1) BR8304632A (fr)
DE (2) DE3232120A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571294A1 (fr) * 1984-10-09 1986-04-11 Bosch Gmbh Robert Appareil a choc a manoeuvre electromagnetique comportant un amortisseur pneumatique
FR2583715A1 (fr) * 1985-06-12 1986-12-26 Lai Wen Tah Agrafeuse a force d'impact accrue, comportant un dispositif absorbant la force de rebondissement
DE102004008959A1 (de) * 2004-02-24 2005-09-08 Aplus Pneumatic Corp. Nagel-Tacker
WO2015169167A1 (fr) * 2014-05-05 2015-11-12 北京大风时代科技有限责任公司 Cloueuse électromagnétique
CN105451944A (zh) * 2013-07-31 2016-03-30 日立工机株式会社 打入机

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3405906A1 (de) * 1984-02-18 1985-08-22 Robert Bosch Gmbh, 7000 Stuttgart Eintreibgeraet fuer befestigungsmittel, insbesondere elektrotacker
US4940177A (en) * 1988-12-30 1990-07-10 Jimena Carlos L Electric stapler having electronic control circuit
GB2275227B (en) * 1993-02-23 1996-11-13 Tohoku Ricoh Co Limited Stencil duplication machine
DE19728176A1 (de) * 1997-07-02 1999-01-07 Hilti Ag Setzgerät
WO2002016085A1 (fr) 2000-08-25 2002-02-28 Barber John P Dispositif a chocs
US6783051B2 (en) * 2002-01-15 2004-08-31 The Fletcher-Terry Company Point driver
US20040159695A1 (en) * 2002-08-23 2004-08-19 Chu-Kuo Wang Nail stapler
US6742691B2 (en) * 2002-08-23 2004-06-01 Mu-Yu Chen Nail stapler
US6662990B1 (en) * 2003-01-03 2003-12-16 Modern Pioneer Ltd. Buffer apparatus of electrical nailing gun
CN2644112Y (zh) * 2003-07-04 2004-09-29 益卓有限公司 电动钉枪
US6857549B1 (en) * 2003-11-21 2005-02-22 Navtor Technology Corporation Nail driving gun with a shock-absorbing member
US7503400B2 (en) * 2004-01-30 2009-03-17 Arrow Fastener Co., Inc. Two shot power nailer
GB2411143B (en) * 2004-02-19 2005-12-28 Aplus Pneumatic Corp Nail stapler
US9071120B2 (en) * 2011-07-19 2015-06-30 Kanzaki Kokyukoki Mfg. Co., Ltd. Linear actuator and boring device
JP5991425B2 (ja) 2013-03-29 2016-09-14 日立工機株式会社 打込機
US12202112B2 (en) 2021-01-20 2025-01-21 Milwaukee Electric Tool Corporation Powered fastener driver
WO2022159538A1 (fr) 2021-01-20 2022-07-28 Milwaukee Electric Tool Corporation Dispositif d'entraînement d'élément de fixation électrique
US12263568B2 (en) * 2021-09-15 2025-04-01 Robert Bosch Power Tools GmbH Head valve system for air spring power tool

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1853695A (en) * 1930-02-25 1932-04-12 Clarence M Griggs Pneumatic improvement for solenoid hammers
GB920586A (en) * 1960-09-21 1963-03-06 Bourcier Carbon Christian Improvements in or relating to pneumatic shock absorbers
US3434026A (en) * 1966-12-12 1969-03-18 Fastener Corp Electrically operated reciprocating tool
CA1039001A (fr) * 1975-02-13 1978-09-26 Duo-Fast Corporation Outil cloueur electrique
US4183453A (en) * 1977-04-10 1980-01-15 Swingline, Inc. Electronically operated portable fastener driving tool
DE2729002C3 (de) * 1977-06-28 1981-08-13 Erwin Müller GmbH & Co, 4450 Lingen Heft- oder Nagelgerät dessen Eintreibstößel während seines Arbeitshubes mittels Tauchanker und Magnetspule antreibbar ist
CA1124366A (fr) * 1977-10-04 1982-05-25 Edward E. Barrett Outil de serrage portatif a commande electronique
DE3047662C2 (de) * 1980-12-18 1985-02-21 Karl M. Reich Maschinenfabrik GmbH, 7440 Nürtingen Puffersystem bei Einschlaggeräten

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2571294A1 (fr) * 1984-10-09 1986-04-11 Bosch Gmbh Robert Appareil a choc a manoeuvre electromagnetique comportant un amortisseur pneumatique
FR2583715A1 (fr) * 1985-06-12 1986-12-26 Lai Wen Tah Agrafeuse a force d'impact accrue, comportant un dispositif absorbant la force de rebondissement
DE102004008959A1 (de) * 2004-02-24 2005-09-08 Aplus Pneumatic Corp. Nagel-Tacker
CN105451944A (zh) * 2013-07-31 2016-03-30 日立工机株式会社 打入机
CN105451944B (zh) * 2013-07-31 2017-12-12 日立工机株式会社 打入机
WO2015169167A1 (fr) * 2014-05-05 2015-11-12 北京大风时代科技有限责任公司 Cloueuse électromagnétique

Also Published As

Publication number Publication date
DE3232120A1 (de) 1984-03-01
US4515303A (en) 1985-05-07
DE3374184D1 (en) 1987-12-03
EP0104360B1 (fr) 1987-10-28
EP0104360A3 (en) 1985-07-03
JPS5959361A (ja) 1984-04-05
BR8304632A (pt) 1984-04-03
JPH0474149B2 (fr) 1992-11-25

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