EP0152628B1 - Outil pour poser des attaches, en particulier agrafeuse électrique - Google Patents

Outil pour poser des attaches, en particulier agrafeuse électrique Download PDF

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Publication number
EP0152628B1
EP0152628B1 EP84116358A EP84116358A EP0152628B1 EP 0152628 B1 EP0152628 B1 EP 0152628B1 EP 84116358 A EP84116358 A EP 84116358A EP 84116358 A EP84116358 A EP 84116358A EP 0152628 B1 EP0152628 B1 EP 0152628B1
Authority
EP
European Patent Office
Prior art keywords
housing
guide sleeve
exciter coil
compression spring
coil
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.)
Expired
Application number
EP84116358A
Other languages
German (de)
English (en)
Other versions
EP0152628A1 (fr
Inventor
Manfred Dipl.-Ing. Buck
Wolfang Dipl.-Ing. Schmid
Karl Dr. Ing. Wanner
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 EP0152628A1 publication Critical patent/EP0152628A1/fr
Application granted granted Critical
Publication of EP0152628B1 publication Critical patent/EP0152628B1/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 relates to a driving tool for fasteners, such as clips, nails and the like.
  • a driving tool for fasteners such as clips, nails and the like.
  • an electric tacker the type specified in the preamble of claim 1.
  • the excitation coil of the electromagnet has an approximately yarn-roll-shaped coil body which receives the excitation winding and is attached to the housing on both end faces.
  • Such electric staplers generally work with pusher knife or pusher speeds of m, ax. 9 m / s.
  • a ram weight of approx. 150 g is required.
  • an acceleration time of the impact knife of approx. 0.01 s an average force on the ram or the impact knife of 135 N results, which results in a maximum force of 190 N with a time course of the force corresponding to the time course of the current.
  • the fastener i.e. the clamp or the nail
  • the tacker is accelerated forward again after the return movement has been caught by the operator's hand and struck on the workpiece .
  • the fastening means protrudes over the workpiece surface with an overhang that depends on the pressing force, while in the other case the tacking nose that hits the workpiece surface again causes ugly impressions there. In both cases, the work result is very poor.
  • the driving tool according to the invention for fasteners, such as clips or nails, with the characterizing features of claim 1 has the advantage that only a relatively small recoil force is exerted on the housing of the driving tool during the work process, which can be easily picked up by the operator.
  • the driving tool thus remains in constant contact with the workpiece, so that the fastening means are always driven in flush with the workpiece surface, regardless of the pressing force.
  • the work result achieved is always optimal. Impacts in the workpiece surface are safely excluded.
  • the back impulse exerted on the excitation coil when the impact knife accelerates gives the excitation coil a return speed of approx. 1 m / s.
  • the excitation coil has traveled a distance of approx. 10 mm at the point in time when the fastening means has just fully penetrated the workpiece.
  • the return spring exerts only a small force on the excitation coil and thus on the housing of the driving tool, so that the driving tool always remains in contact with the workpiece.
  • the movement of the excitation coil following the end of the driving-in process is determined by the progression of the spring characteristic of the return spring.
  • a steeply progressive spring characteristic saves installation space, but allows the driving tool to jump with a relatively low pressing force.
  • a weakly progressive spring characteristic curve requires more space, but has the advantage of a very low recoil.
  • the drawing shows a section of a longitudinal section of a driving device designed as an electric tacker for driving in fastening clips.
  • the electric tacker which can only be seen in detail in the drawing in longitudinal section as an example of a driving tool is generally known and e.g. described in detail in DE-OS 3 232 137 in structure and mode of operation.
  • the electric tacker has a housing 10 with an ejection channel 11, to which a fastening clip is successively fed from a magazine 12.
  • the feed mechanism of the individual fastening clips from the magazine 12 into the ejection channel 11 is also described in detail in the above-mentioned DE-OS, so that there is no need to go into this further.
  • a plunger or pusher knife 13 is guided in the housing 10 and protrudes into the ejection channel 11 and drives the fastening clip located in the ejection channel 11 into a workpiece onto which the ejection channel 11 is to be pressed.
  • the impact knife 13 is driven by an electromagnet 14 against the force of a return spring 15.
  • the electromagnet 14 has an excitation coil 16 and a magnet armature 17, which plunges into the central opening 18 of the excitation coil 16 and is guided axially displaceably therein.
  • the excitation coil 16 consists of an approximately yarn-roll-like coil body 19, which has two cylindrical projections 20, 21, each projecting on both end faces, and an excitation winding 22 received by the coil body 19.
  • the inner cylinder of the coil body 19 forms the central opening 18, in which the Shock knife 13 carrying magnet armature 17 is guided to be longitudinally displaceable.
  • the bobbin 19 is surrounded by an approximately cup-shaped guide sleeve 23 and projects with a cylindrical extension 20 into a cylindrical socket 24 which protrudes from the bottom of the guide sleeve 23.
  • the coil former 19 is fastened to the bottom 25 of the cylinder socket 24 by any fastening means, with the aid of which at the same time an annular elastic stop element lying on the opposite side of the bottom 25 26 is held. With this stop element 26, the bottom 25 of the guide sleeve 23 rests against an annular web 27 of the housing 10 when the electromagnet 14 is not excited.
  • the guide sleeve 23 is guided in a longitudinally displaceable manner in ribs 28 which are arranged distributed on the inner wall of the housing 10.
  • the open end face of the pot-shaped guide sleeve 23 is closed by an annular disk 29, which forms an additional mass, and is pressed onto the end edge 32 of the guide sleeve 23 by a return spring 30, which is designed here as a helical compression spring 31 surrounding the magnet armature 17 coaxially.
  • the annular disc 29 has a recess 33 which forms a support and centering surface for the helical compression spring 31.
  • the other side of the helical compression spring 31 is supported on the housing 10 via a damping element 34, here a damping rubber acting as an end stop.
  • the spring characteristic of the helical compression spring 31 is designed progressively. Depending on the needs at hand, the spring characteristic can be either steep or flat and / or strong or weakly progressive. With a steep spring characteristic, the installation space required for accommodating the helical compression spring 31 is small, but the contact pressure to be applied is still relatively high in order to prevent the electric tacker from jumping. In the second case, the additional construction volume for accommodating the helical compression spring 31 is considerably larger, but here one has the advantage of a very low recoil.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Claims (10)

1. Appareil d'enfoncement pour moyens de fixation, tels que agrafes, clous et autres du même genre, notamment agrafeuse électrique, comportant une lame-poussoir (13), guidée dans un boîtier (10), pour enfoncer les moyens de fixation, et un électroaimant (14) monté dans le boîtier (10), entraînant la lame-poussoir (13), et qui est pourvu d'une bobine excitatrice (16) et d'un induit d'aimant (17) passant dans l'ouverture centrale (18) de cette bobine et auquel est fixée la lame-poussoir (13), appareil d'enfoncement caractérisé en ce que la bobine excitatrice (16) est guidée dans le boîtier (10), en étant mobile en direction axiale, et appuie contre le boîtier (10) par l'intermédiaire d'un ressort de rappel (30).
2. Appareil selon la revendication 1, caractérisé en ce que le ressort de rappel (30) présente une courbe caractéristique de ressort progressive.
3. Appareil selon la revendication 1 ou 2, caractérisé en ce que le ressort de rappel (30) est constitué sous la forme de ressort de pression, de préférence sous la forme d'un ressort de pression hélicoïdal (31), entourant co-axialement l'induit (17) de l'aimant, et qui s'appuie, d'une part, sur la face frontale de la bobine excitatrice (16) et, d'autre part, sur le boîtier (10).
4. Appareil selon la revendication 3, caractérisé en ce que un élément amortisseur (34), agissant comme butée d'extrémité, est disposé entre le ressort de pression (31 ) et le boîtier (10).
5. Appareil selon l'une des revendications 1 à 4, caractérisé en ce qu'une masse additionnelle (29) est fixée à la bobine excitatrice (16).
6. Appareil selon l'une des revendications 1 à 5, caractérisé en ce que la bobine excitatrice (16) est fixée dans un manchon de guidage (23), à peu près en forme de pot, pourvu d'une tubulure cylindrique (24) coaxiale, et en ce que le manchon de guidage (23) est maintenu de façon à pouvoir se déplacer longitudinalement dans le boîtier (10).
7. Appareil selon la revendication 6, caractérisé en ce que, dans la position initiale sans excitation de la bobine excitatrice (16) et de l'induit (17) de l'aimant, le fond (25) du manchon de guidage (23) s'applique, par l'intermédiaire d'au moins un élément de butée (26) élastique, contre une traverse annulaire (27) faisant saillie en direction radiale du boîtier (10).
8. Appareil selon la revendication 6 ou 7, caractérisé en ce que la bobine excitatrice (16) comporte une armature de bobine (19), à peu près du genre de celle d'une bobine de fil, qui pénètre par un appendice (20) de forme cylindrique dans la tubulure cylindrique (24) du manchon de guidage (23) et - de préférence, conjointement avec l'élément de butée (26) - est fixé au fond (25) du manchon de guidage (23).
9. Appareil selon l'une des revendications 6 à 8, caractérisé en ce que la masse additionelle est constituée sous la forme de disque annulaire (29) qui, du côté où est ouvert le manchon de guidage (23) en forme de pot, s'applique sur le bord frontal (32) de celui-ci, et en ce que le ressort de pression (31) s'appuie sur ce disque annulaire (29).
10. Appareil selon la revendication 9, caractérisé en ce que le disque annulaire (29) comporte un évidement (33), qui forme une surface d'appui et de centrage pour le ressort de pression (31).
EP84116358A 1984-02-18 1984-12-27 Outil pour poser des attaches, en particulier agrafeuse électrique Expired EP0152628B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843405906 DE3405906A1 (de) 1984-02-18 1984-02-18 Eintreibgeraet fuer befestigungsmittel, insbesondere elektrotacker
DE3405906 1984-02-18

Publications (2)

Publication Number Publication Date
EP0152628A1 EP0152628A1 (fr) 1985-08-28
EP0152628B1 true EP0152628B1 (fr) 1987-07-15

Family

ID=6228148

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84116358A Expired EP0152628B1 (fr) 1984-02-18 1984-12-27 Outil pour poser des attaches, en particulier agrafeuse électrique

Country Status (3)

Country Link
US (1) US4565313A (fr)
EP (1) EP0152628B1 (fr)
DE (2) DE3405906A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5813477A (en) * 1996-05-23 1998-09-29 Chicago Pneumatic Tool Company Vibration-reduced impact tool and vibration isolator therefor
US6044872A (en) * 1998-10-09 2000-04-04 Stephens; Donald R. Fence clip installer
CA2420365A1 (fr) 2000-08-25 2002-02-28 Senco Products, Inc. Dispositif a chocs
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
US6854530B1 (en) * 2003-09-01 2005-02-15 Chih Hao Yiu Method for driving electric percussion tool
US7503400B2 (en) * 2004-01-30 2009-03-17 Arrow Fastener Co., Inc. Two shot power nailer
US20070125562A1 (en) * 2005-12-04 2007-06-07 Mobiletron Electronics Co.,Ltd. Method of controlling striking force and rebounding force for electric nailing machine
US7537145B2 (en) 2007-02-01 2009-05-26 Black & Decker Inc. Multistage solenoid fastening device
EP2594807A1 (fr) * 2011-11-16 2013-05-22 Palfinger Platforms GmbH Système hydraulique doté d'au moins une machine d'entraînement, notamment développée comme une pompe
US11110577B2 (en) 2017-11-16 2021-09-07 Milwaukee Electric Tool Corporation Pneumatic fastener driver

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE198939C (fr) *
US3438449A (en) * 1967-04-10 1969-04-15 Arthur J Smith Pneumatically operated power driver
US4005812A (en) * 1975-06-04 1977-02-01 Duo-Fast Corporation Electric fastener driving tool
DE3232137C2 (de) * 1981-09-23 1985-08-29 Erwin Müller GmbH & Co, 4450 Lingen Elektrisch betriebenes Eintreibgerät für Heft- und Befestigungsmittel
DE3304302C2 (de) * 1981-09-23 1987-04-16 Erwin Müller GmbH & Co, 4450 Lingen Elektrisch betriebenes Gerät zum Eintreiben von Befestigungsmitteln
DE3232120A1 (de) * 1982-08-28 1984-03-01 Robert Bosch Gmbh, 7000 Stuttgart Elektromagnetisch betriebenes einschlaggeraet

Also Published As

Publication number Publication date
DE3464713D1 (en) 1987-08-20
US4565313A (en) 1986-01-21
DE3405906A1 (de) 1985-08-22
EP0152628A1 (fr) 1985-08-28

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