EP0183981A2 - Dispositif de clouage ou d'agrafage entraîné par une batterie - Google Patents

Dispositif de clouage ou d'agrafage entraîné par une batterie Download PDF

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Publication number
EP0183981A2
EP0183981A2 EP85113750A EP85113750A EP0183981A2 EP 0183981 A2 EP0183981 A2 EP 0183981A2 EP 85113750 A EP85113750 A EP 85113750A EP 85113750 A EP85113750 A EP 85113750A EP 0183981 A2 EP0183981 A2 EP 0183981A2
Authority
EP
European Patent Office
Prior art keywords
nail
stapler according
switch
capacitor
battery
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
EP85113750A
Other languages
German (de)
English (en)
Other versions
EP0183981A3 (en
EP0183981B1 (fr
Inventor
Manfred Dipl.-Ing. Buck
Peter Jordan
Hermann Möhring
Manfred Ruff
Walter Strohbeck
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6251753&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0183981(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP0183981A2 publication Critical patent/EP0183981A2/fr
Publication of EP0183981A3 publication Critical patent/EP0183981A3/de
Application granted granted Critical
Publication of EP0183981B1 publication Critical patent/EP0183981B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F7/00—Magnets
    • H01F7/06—Electromagnets; Actuators including electromagnets
    • H01F7/08—Electromagnets; Actuators including electromagnets with armatures
    • H01F7/18—Circuit arrangements for obtaining desired operating characteristics, e.g. for slow operation, for sequential energisation of windings, for high-speed energisation of windings
    • 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 nail or stapler according to the preamble of the main claim, nail or stapler as such has long been known.
  • Known nailing or stapling devices are, however, either hand-operated or are fed from the lighting network. With hand-operated devices, there is the disadvantage that the worker experiences difficulties with the hand muscles over a longer period of operation.
  • the nail or stapler according to the invention with the characterizing features of the main claim has the advantage that even with relatively small Batteries sufficient energy is available for the tie rod of the device. Another advantage is that the battery is not damaged by the strong current surge that occurs when the tie rod is actuated or is supported by a memory, for example a capacitor.
  • the nail or stapler according to the invention is therefore easy and small to set up and reliable.
  • the switch between the capacitor and the tie rod winding is also advantageously designed as a thyristor, cold cathode thyratron or transistor. There will be no sparks when the switch is closed.
  • the capacitor can be chosen smaller without the stored energy being reduced. If a very high charging voltage is sought for the capacitor, it is appropriate to multiply the voltage z. B. to choose a flyback or forward converter, with the output voltage of the capacitor is charged. This ensures that a high output voltage is achieved with very few and simple circuitry measures, which causes a high charging voltage of the capacitor. The capacitor can then be selected to be particularly small. It is also beneficial to regulate the output voltage of the converter. Even with different battery voltage, this ensures that always the same output voltage and thus the same predetermined energy is available. For this purpose, the output voltage is expediently supplied in whole or in part to a comparator which, when a predetermined voltage is exceeded, puts a switching device into operation, by means of which further operation of the converter is prevented.
  • a further advantageous embodiment is given in that the selection switch can be switched over quickly during an operation. This makes it possible to trigger a double blow by first discharging part of the capacitors and then the other part of the capacitors. This is desirable, for example, to fully drive a staple into hardwood. If a higher energy is required, it is also advantageous, for example, to connect the capacitors, which are currently operated separately, in parallel, so that the impact force can be increased.
  • This basic idea can advantageously also be used to build up a nailing and stapling device whose impact strength is adjustable. In this case, the number of capacitors used per impact determines the impact strength. For example, it is possible to create any impact strength by connecting one, two or more capacitors, whereby only the energy required for the driving-in process is used by the nailing and stapling device.
  • FIG. 3 shows a first embodiment
  • FIG. 2 shows a second embodiment
  • FIG. 3 shows a third embodiment
  • FIG. 4 shows a fourth embodiment of the invention
  • FIG. 5 shows a fifth embodiment of the invention.
  • Known electrical nailing and stapling devices comprise a housing jacket in which a coil winding is installed, 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 pulled into the coil accelerated. The driver attached to the tie rod encounters a staple, a nail or a clip that projects into the ejection channel, separates it from the staple strip stored in the magazine and accelerates the staple in the direction of the ejection opening. There, the tacking agent is then driven into the material located under the discharge opening. The recoil force acting on the driver from the tacking means and the force of a spring bring the tie rod and driver back to their starting position, so that a new working cycle can take place.
  • An accumulator or battery pack which is accommodated in the area of the device, serves as the energy source for the nailing or stapling device. Since the current through the coil is very large, the accumulator package would also have to be selected very large so that the necessary energy can be provided for the short period of the current surge. However, this leads to bulky, large devices.
  • FIG. 1 shows one possibility of how the necessary energy requirement for the coil can be provided.
  • a resistor 2 is connected to an accumulator or to a battery 1, followed by two capacitors 3 and 4.
  • the capacitors 3 and 4 are on the further connection the battery 1 connected.
  • a line leads from the resistor 2 to a switch 5, which in turn is connected to a tie rod coil 6.
  • Another pole of the battery 1 is also connected to the tie rod coil 6.
  • the capacitor battery with the capacitors 3 and 4 is now charged by the battery 1 via the charging resistor 2 and corresponding energy is stored in the capacitors 3 and 4. If the switch 5 is now closed, the capacitor battery with the capacitors 3 and 4 discharges via the coil 6. After the charging process, the switch is opened again by the operator so that the capacitors 3 and 4 can be recharged.
  • the resistor 2 essentially serves to limit the charging current into the capacitors 3 and 4 after a stapling process, since this would be very high in the beginning. At the same time, the charging resistance also limits the current during which the
  • the buffering by means of the capacitors 3 and 4 has the effect that the accumulator 1 can be kept relatively small, since the current surge only acts for a very short time, during which it is, however, very high.
  • the capacitors now prevent the voltage from breaking down due to the internal resistance of the battery. Furthermore, the unused current drain is prevented by the charging resistor, since the switch 5 is usually closed much longer than is required for the stapling process.
  • the charging resistor 2 which is followed by a switch 8, is in turn connected to the battery 1.
  • the capacitors 3 and 4 and additionally a resistor 7 are in turn connected in a parallel circuit, which in turn are connected to the further pole of the battery 1.
  • a switch is also connected to the switch 8.
  • the further connection of the switch 5 in turn leads to the tie rod coil 6, which in turn is connected to the further pole of the battery 1.
  • the additional switch 8 prevents a leakage current from flowing through the capacitors 3 and 4 in the idle state of the nailing or stapling device.
  • This switch is expediently actuated when the operator grips the handle of the nailing or stapling device with his hand.
  • the switch is therefore advantageously housed in the handle area of the device.
  • the capacitors 3 and can now be charged via the charging resistor 2. If the switch 5 is actuated, the stapling process is triggered in a known manner.
  • Figure 3 shows an embodiment by which it is ensured that the stapling process is only to be initiated with charged capacitors.
  • a switch 15 is connected to one pole of the battery 1 and is in turn connected to a connection of a resistor 9 and a resistor 14.
  • a potentiometer 10 is connected from the resistor 9 to the other connection of the battery 1.
  • a resistor 7 is connected from the resistor 14 to the other connection of the battery.
  • the capacitors 3 and 4 are arranged parallel to the resistor 7.
  • the midpoint between the resistors 14 and 7 is connected to a connection of a comparator 11.
  • the other connection of the comparator 11 is connected to the connection point of resistors 9 and 10 in connection.
  • a thyristor is also connected.
  • the further connection of the thyristor 13 is connected to a connection of the tie rod coil 6.
  • the other connection of the tie rod coil 6 is in turn led to the battery 1.
  • the output of the comparator 11 is connected to an ignition device 12, which is constructed in a known manner and whose output is connected to the ignition connection of the thyristor 13.
  • the operation of the circuit arrangement according to FIG. 3 essentially corresponds to that according to FIG. 2.
  • the switch 15 is closed, the capacitors 3 and 4 are charged via the resistor 14. An actuation of the switch 5 is omitted. If the capacitors 3 and 4 are sufficiently charged, this is recognized by the comparator 11, which in turn triggers the ignition circuit 12. As a result, the thyristor 13 is turned on so that the stapling process can take place.
  • the switch 15 is designed like the switch 5.
  • Impact strength regulation is also possible by means of the potentiometer 10.
  • the value of the potentiometer 10 makes it possible to shift the response threshold of the comparator 11, so that a stapling process takes place when the capacitors 3 and 4 have different charge levels.
  • the impact strength is directly proportional to the state of charge of the capacitors 3 and 4. An ignition occurs when the state of charge of the capacitors 3 and 4 has reached the threshold value set with the potentiometer 10.
  • the high-resistance resistor 7 ensures that the capacitor bank with the capacitors 3 and 4 is discharged in the idle state. To increase the energy stored in capacitors 3 and 4, it may be advisable to connect a voltage multiplier circuit. Since the energy stored in the capacitors 3 and 4 is square with the capacitor voltage, a much higher energy can be supplied to the magnet system.
  • the switches 5, 8 and 15 are generally also to be replaced by thyristors, cold cathode thyratron, transistor or other semiconductor circuits. Any sparking that may occur can be avoided easily and safely.
  • FIG. 4 shows a circuit arrangement in which the idea of voltage multiplication is realized by means of a flyback or forward converter.
  • a flyback or forward converter 21 is connected to the battery 1, by means of which it is possible to step-up the battery voltage.
  • the output voltage of the flyback converter or forward converter 21 is arbitrary within wide limits and can be chosen, for example, so that 6 coils can be used as the coil which are customary in commercially available, line-bound staple guns. However, higher or lower voltages can also be set.
  • the capacitor 4, which is charged with the output voltage, is in turn connected to the output terminals of the converter 21.
  • the capacitor is connected to the tie rod coil 6 via a switch 5.
  • the switch 5 is formed as a cold cathode try whose control electrode is connected to an ignition circuit 20. Cold cathode thyratrons are generally known as such and, in addition to thyristors, cold cathode thyratron or transistor, are particularly suitable as electrical switches.
  • a potentiometer is used to switch part of the capacitor voltage or the output voltage of the flyback converter 21. is acceptable.
  • the output signal of the potentiometer 20 is fed to a comparator 11, the output of which is fed via a diode 24 to an input of the flyback converter 21.
  • a timing element 22 is connected to the battery and is also fed to a further input of the flyback converter via a diode 23.
  • the further input of the flyback converter 21 leads to a transistor switch, by means of which it is possible to interrupt the function of the flyback converter.
  • This measure makes it possible to dispense with a manual switch-off process for the battery switch.
  • the comparator 11 causes the converter 21 to be switched off so that it no longer vibrates by itself. A current draw from the battery is then interrupted.
  • the same measure is achieved by the timing element 22 if the ignition switch 20 has not been actuated within a predetermined time and thus a current would be drawn from the battery 1 to maintain the charge on the capacitor 4.
  • the timer 22 also causes the flyback converter 21 to be switched off via the diode 23, so that further current consumption is prevented.
  • the diodes 23 and 24 only serve to decouple the switching outputs of the comparator 11 and the timing element 22.
  • a new start of the converter 21 is achieved either by a switch which is arranged in the battery circuit or by a push button connected to the ignition circuit, which by a short press causes the converter to oscillate,
  • a voltage is available at the output of flyback converter 21 which essentially corresponds to the peak value of the mains voltage. It is thereby achieved that the coils which have been tried and tested in network staplers can be used as coil 6.
  • the energy supplied to the coil 6 is adjustable not only by the choice of the voltage on the capacitor 4 but also by a premature switch-off of the switch 5, for example if the current consumption of the coil 6 is measured or if it is determined by means of a material selection switch that for a specific driving process relatively little energy is needed.
  • FIG. 5 shows a battery 1 which is connected to the voltage converter 21.
  • This voltage converter can be designed, for example, as a flyback converter, as in the circuit mentioned above. While one output of flyback converter 21 is grounded, the other output of flyback converter 21 leads to a further selection holder 31.
  • One connection of selection switch 33 is connected to capacitor 3 and the other output of the selection switch is connected to capacitor 4.
  • the selection switch 30 makes it possible to connect the switch 5 to either the capacitor 3 or the capacitor 4.
  • the further connection of the switch 5 is connected to the tie rod of the nailing or stapling device.
  • a switching device 32 makes it possible to connect the capacitors 3 and 4 to one another in parallel.
  • the selector switches 3J and 30 are advantageously mechanically coupled to one another, so that when the switch 32 is open, one capacitor 3 is connected to the switch 5 while the other capacitor is being recharged. The nail or stapler is thereby ready for operation so that a wrapping process can be carried out while the other capacitor is being charged. If the full energy is required, the switch 32 is closed so that both capacitors are in parallel.
  • the circuit arrangement is characterized by the fact that there is a shorter recovery time or a smaller construction of the voltage converter if one assumes that the full impact energy is not normally required.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Engineering (AREA)
  • Power Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP85113750A 1984-12-03 1985-10-29 Dispositif de clouage ou d'agrafage entraîné par une batterie Expired - Lifetime EP0183981B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3444015 1984-12-03
DE19843444015 DE3444015A1 (de) 1984-12-03 1984-12-03 Batteriebetriebenes nagel- oder klammergeraet

Publications (3)

Publication Number Publication Date
EP0183981A2 true EP0183981A2 (fr) 1986-06-11
EP0183981A3 EP0183981A3 (en) 1987-05-13
EP0183981B1 EP0183981B1 (fr) 1990-01-10

Family

ID=6251753

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85113750A Expired - Lifetime EP0183981B1 (fr) 1984-12-03 1985-10-29 Dispositif de clouage ou d'agrafage entraîné par une batterie

Country Status (3)

Country Link
EP (1) EP0183981B1 (fr)
JP (1) JPS61136777A (fr)
DE (2) DE3444015A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2674704A1 (fr) * 1990-02-28 1992-10-02 Arrow Fastener Cy Appareil pour entrainer un dispositif electromagnetique et appareil alimente par des piles pour ejecter un projectile, par exemple agrafeuse electrique.
GB2403681A (en) * 2003-07-09 2005-01-12 Acuman Power Tools Corp A method for controlling the operation time of an electric nailer
US6891457B2 (en) 2003-02-05 2005-05-10 Makita Corporation Power tools

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29708782U1 (de) * 1997-05-16 1997-08-07 Erwin Müller GmbH & Co, 49808 Lingen Elektrisch betriebenes Heft- und Nagelgerät
JP4556485B2 (ja) * 2004-05-18 2010-10-06 日立工機株式会社 バッテリ式瞬間作動工具
JP2012179664A (ja) * 2011-02-28 2012-09-20 Hitachi Koki Co Ltd 電動式打込機及び留め具の打込み方法
JP2012179661A (ja) * 2011-02-28 2012-09-20 Hitachi Koki Co Ltd 電動式打込機及び留め具の打込み方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL74645C (fr) * 1948-11-09
DE1536455A1 (de) * 1967-08-05 1970-01-02 Mueller Erwin Metall Elektromagnetischer Heftapparat
DE2226788C2 (de) * 1971-08-20 1974-05-22 Erwin Mueller Kg, Metallwarenfabrik, 4450 Lingen Nagler mit von dem Anker eines Elektromagneten angetriebenem Eintreibstößel
DE2537815C2 (de) * 1975-08-25 1985-01-03 Grumman Aerospace Corp., Bethpage, N.Y. Verfahren und Vorrichtung zum Einführen eines Bolzens mit Preßsitz in eine Bohrung
JPS531946A (en) * 1976-06-25 1978-01-10 Nippon Door Check Mfg Co Pivot supporting structure for swing door and pivoted door
US4349143A (en) * 1980-05-12 1982-09-14 Parker Manufacturing Co. Electric stapler and driver assembly therefor
US4500938A (en) * 1983-02-16 1985-02-19 Textron, Inc. Fastener driving device
DE3426072A1 (de) * 1984-07-14 1986-01-30 Erwin Müller GmbH & Co, 4450 Lingen Elektrisch betriebenes heft- und nagelgeraet

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2674704A1 (fr) * 1990-02-28 1992-10-02 Arrow Fastener Cy Appareil pour entrainer un dispositif electromagnetique et appareil alimente par des piles pour ejecter un projectile, par exemple agrafeuse electrique.
GB2253953B (en) * 1990-02-28 1995-07-05 Arrow Fastener Co Inc Apparatus for driving the armature of a battery powered device
US6891457B2 (en) 2003-02-05 2005-05-10 Makita Corporation Power tools
GB2403681A (en) * 2003-07-09 2005-01-12 Acuman Power Tools Corp A method for controlling the operation time of an electric nailer
GB2403681B (en) * 2003-07-09 2005-06-29 Acuman Power Tools Corp Means for controlling operation of an electric nailer

Also Published As

Publication number Publication date
EP0183981A3 (en) 1987-05-13
EP0183981B1 (fr) 1990-01-10
JPS61136777A (ja) 1986-06-24
DE3444015A1 (de) 1986-06-05
DE3575274D1 (de) 1990-02-15

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