EP0338257B1 - Schlagregelung für Nagel- oder Klammergerät - Google Patents

Schlagregelung für Nagel- oder Klammergerät Download PDF

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Publication number
EP0338257B1
EP0338257B1 EP89104870A EP89104870A EP0338257B1 EP 0338257 B1 EP0338257 B1 EP 0338257B1 EP 89104870 A EP89104870 A EP 89104870A EP 89104870 A EP89104870 A EP 89104870A EP 0338257 B1 EP0338257 B1 EP 0338257B1
Authority
EP
European Patent Office
Prior art keywords
impact
driving
stapling apparatus
nailing
driver
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 - Lifetime
Application number
EP89104870A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0338257A1 (de
Inventor
Manfred Dipl.-Ing. Buck
Peter Dipl.-Ing. Jordan
Wilfried Dipl.-Ing. Kabatnik
Wolfgang Dipl.-Ing. Schmid
Karl Dr. Dipl.-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 EP0338257A1 publication Critical patent/EP0338257A1/de
Application granted granted Critical
Publication of EP0338257B1 publication Critical patent/EP0338257B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
    • B25C5/00—Manually operated portable stapling tools; Hand-held power-operated stapling tools; Staple feeding devices therefor
    • B25C5/10—Driving means
    • B25C5/15—Driving means operated by electric power

Definitions

  • the invention is based on a circuit arrangement for an electrically operated multi-blow nailing or stapling device for fasteners according to the preamble of the main claim.
  • Electrically operated nailing or stapling devices are already known in which the fastening means is driven into the workpiece with a driver fastened to a magnet armature.
  • Devices are also known in which the impact force on the fastening means can be set manually for materials of different hardness, wherein several strikes for driving in the fastening means are also possible.
  • the driver strikes the fastener until a magnet armature touches a switching device in the lower dead center of movement, which switches off the current pulses for the magnet coil. It is to be regarded as unfavorable that the driving depth is not adjustable, but is determined by the construction of the shock channel and the magnet armature. The driving depth of the fastener is therefore not variable or adjustable, for example, flush or 1 mm above the material surface. It is also unfavorable that with different hard materials such as pine wood or beech wood to optimize the impact force, tests must first be carried out in order to determine the most favorable setting values for the impact force. The nail or stapler must then be set manually to this value using a setting button on the device.
  • the circuit arrangement according to the invention with the characterizing features of the main claim has the advantage that the driving energy for driving in the fastener is regulated depending on the change in propulsion. This makes it possible to continuously adapt the driving energy to the hardness of the workpiece without the operator having to make any special settings regarding the impact force or number of impacts on the nailing or stapling device. Preliminary tests are also not necessary, since the nailing or stapling device automatically determines the impact strength required for driving in.
  • the depth control of the driving-in process can advantageously be adjusted in that the reading device can be displaced in the direction of impact. By moving the reading device, the driving depth of the fastener can then be adjusted in a simple manner.
  • the impact force for the driver is regulated by pulse electronics, which ensures an optimized driving-in process both for a hard and a soft workpiece.
  • an advantageous change in the impact force of the driver is achieved in a simple manner.
  • the lighting up of a display after the end of the driving-in process is also advantageous for the operator, because it enables him to implement the nailing or stapling device without wasting time and thus to work quickly.
  • an automatic system for example automatic time or impact counter, advantageously switches off the driving-in process.
  • the driver also advantageously prevents the next fastening means from advancing into the ejection channel until the driving-in process has ended. This prevents malfunctions while working and ensures that you can continue working quickly with the nail or stapler.
  • FIG. 1 shows a first embodiment with an optical light barrier
  • FIG. 2 shows a second embodiment with a reflection light barrier.
  • Electrically operated nailing or stapling devices usually have a housing in which a coil winding is installed and the coil body of which has a continuous bore running in the coil axis as a guide for a tie rod. If a current impulse flows through the coil winding, the tie rod is accelerated in the guide area.
  • the driver fastened to the tie rod encounters a fastener projecting into the ejection channel, for example a nail or a clamp, separates this from the fastener strip stored in the magazine and accelerates the fastener in the direction of the ejection opening. There the fastener is then driven into the material located under the discharge opening.
  • FIG. 1 shows a block diagram of a first exemplary embodiment, in which a known magnet coil 4 with a tie rod 3 and a driver 1 is assumed.
  • the driver 1 is used for pushing out a fastener, not shown, through an ejection channel, also not shown. Equidistant bores are made on the driver 1 parallel to the direction of impact.
  • the driver 1 is adjusted with its holes to a reading device 15 so that a transmitter 5 can throw its light onto the receiver 6 through a hole 2.
  • the receiver 6 converts the light signal into an electrical signal, which is amplified by the amplifier 20 and fed to the counter 11.
  • the counter 11 is connected to a comparator 17 which compares the counted pulses with a maximum value which it receives from the limit value specification 19.
  • the comparator 17 is connected to a difference generator 18, the output of which acts on a pulse electronics 13. Furthermore, a second output of the comparator 17 is connected to a switching logic 21 which acts on the one hand on the pulse electronics 13 and on the other hand is connected to a display 14. The output of the pulse electronics 13 is connected to a circuit breaker, the output of which is connected to the magnet coil 4 via a main switch 23.
  • an end marking 24 can be provided on the driver 1, which is scanned, for example, with a second sensor and, after the driving-in process has ended, triggers a “reset pulse” which prepares the nailing or stapling device for the next driving-in process.
  • a stop signal is triggered via a switching logic 21, which prevents a renewed triggering of a current pulse for driving the magnet coil 4 in the pulse electronics 13.
  • the display 14 is switched on to indicate to the operator that the driving-in process has ended.
  • the counter signal is passed to a difference generator 18, which determines which change in depth occurred after the last stroke. If the change in depth was too small because, for example, the workpiece was particularly hard, the difference former 18 causes the connected pulse electronics 13 to increase the current flow angle for the controllable semiconductor switch 16. This increases the impact.
  • a timer 25 acts on the circuit breaker 16 after a fixed maximum stroke duration has expired and automatically ends the driving-in process.
  • a stroke limiter can also be used as a protective device. This is necessary when the fastener can no longer be driven in because, for example, it has bent and, as a result, a deeper penetration of the fastener into the workpiece can no longer be registered with the counter 11.
  • the receiver 6 and the transmitter 5 are arranged displaceably in the direction of impact. This makes it possible to regulate the driving of the fastener so that it is either flush with the workpiece surface or protrudes a bit from it.
  • FIG. 2 Another embodiment of the invention is shown in Figure 2.
  • a reflection light barrier 22 is arranged here so that it can read line marks on the driver 1.
  • the output signal of this reflection light barrier is connected to the control electronics 8, which has the same mode of operation as in Figure 1, so that a further description of the function is unnecessary.
  • the regulation of the impact force, which is set by the pulse electronics is fixed based on experience.
  • the circuit arrangement according to the invention can be designed in such a way that the comparator 17, the difference former 18 and the limit value specification 19 are replaced by a mask-programmable memory.
  • the mask-programmable memory contains corresponding information for every change in the driving depth at its exit, with which the impact strength is regulated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
EP89104870A 1988-04-20 1989-03-18 Schlagregelung für Nagel- oder Klammergerät Expired - Lifetime EP0338257B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3813190A DE3813190A1 (de) 1988-04-20 1988-04-20 Schlagregelung fuer nagel- oder klammergeraet
DE3813190 1988-04-20

Publications (2)

Publication Number Publication Date
EP0338257A1 EP0338257A1 (de) 1989-10-25
EP0338257B1 true EP0338257B1 (de) 1993-02-24

Family

ID=6352424

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89104870A Expired - Lifetime EP0338257B1 (de) 1988-04-20 1989-03-18 Schlagregelung für Nagel- oder Klammergerät

Country Status (2)

Country Link
EP (1) EP0338257B1 (enrdf_load_stackoverflow)
DE (2) DE3813190A1 (enrdf_load_stackoverflow)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9126338D0 (en) * 1991-12-11 1992-02-12 Glynwed Eng Fastener applicator
US5511715A (en) * 1993-02-03 1996-04-30 Sencorp Flywheel-driven fastener driving tool and drive unit
US5495161A (en) * 1994-01-05 1996-02-27 Sencorp Speed control for a universal AC/DC motor
US5818186A (en) * 1996-04-03 1998-10-06 Hewlett-Packard Company Multiple impact motor drive for stapling
DE10061830A1 (de) * 2000-12-12 2002-06-13 Adolf Wuerth Gmbh & Co Kg Verfahren und Vorrichtung zur Unterbrechung einer Vorschubbewegung
DE50109817D1 (de) * 2001-07-19 2006-06-22 Hilti Ag Bolzensetzgerät mit Setztiefenregelung
DE102006002237B4 (de) * 2006-01-17 2012-09-20 Böllhoff Verbindungstechnik GmbH Verfahren und Vorrichtung zum Überwachen eines Fügeprozesses zum Verbinden mindestens zweier Bauteile mittels eines Setzbolzens
TWI440530B (zh) * 2008-02-06 2014-06-11 Max Co Ltd Hand tool, nail residual detection mechanism, nail residual detection method, and power saving method
CN110405696B (zh) * 2019-07-15 2022-08-05 南京工程学院 一种全自动订书机

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2933779A1 (de) * 1979-08-21 1981-03-26 Esco Metallwaren Martin Hühnken, 22941 Bargteheide Schaltungsanordnung fuer ein elektrisches eintreibgeraet
DE3232137C2 (de) * 1981-09-23 1985-08-29 Erwin Müller GmbH & Co, 4450 Lingen Elektrisch betriebenes Eintreibgerät für Heft- und Befestigungsmittel
DE3406727A1 (de) * 1984-02-24 1985-08-29 Erwin Müller GmbH & Co, 4450 Lingen Elektrisch betriebenes geraet zum eintreiben von befestigungsmitteln

Also Published As

Publication number Publication date
DE3813190C2 (enrdf_load_stackoverflow) 1990-06-13
DE3813190A1 (de) 1989-11-02
EP0338257A1 (de) 1989-10-25
DE58903585D1 (de) 1993-04-01

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