EP3801990B1 - Appareil de pose - Google Patents

Appareil de pose Download PDF

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Publication number
EP3801990B1
EP3801990B1 EP19726426.0A EP19726426A EP3801990B1 EP 3801990 B1 EP3801990 B1 EP 3801990B1 EP 19726426 A EP19726426 A EP 19726426A EP 3801990 B1 EP3801990 B1 EP 3801990B1
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EP
European Patent Office
Prior art keywords
capacitor
setting device
discharge
control unit
current
Prior art date
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Active
Application number
EP19726426.0A
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German (de)
English (en)
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EP3801990A1 (fr
Inventor
Tilo Dittrich
Norbert Heeb
Kai Friewald
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.)
Hilti AG
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Hilti AG
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Publication of EP3801990A1 publication Critical patent/EP3801990A1/fr
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    • 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 present invention relates to a setting tool for driving fasteners into a substrate.
  • Such setting tools usually have a receptacle for a fastener, from which a fastener received therein is conveyed along a setting axis into the ground.
  • a driving element is driven by a drive along the setting axis towards the fastening element.
  • the drive has an electrical capacitor and a coil.
  • the capacitor is discharged via the coil, as a result of which a Lorentz force acts on the driving element, so that the driving element is moved towards a nail.
  • a control device controls a capacitor in such a way that it absorbs and releases electrical energy, which actuates an electromagnetic coil.
  • the control device consists of a charging circuit and a discharging circuit and should be able to actuate a large-capacity electromagnetic coil by supplying a discharge current of a fixed magnitude from the capacitor to the electromagnetic coil despite its compact dimensions.
  • the object of the present invention is to provide a setting tool of the aforementioned type in which high efficiency and/or good setting quality is ensured.
  • a setting tool for driving fasteners into a substrate having a receptacle which is intended to receive a fastener, a driving element which is intended to convey a fastener received in the receptacle along a setting axis into the substrate , a drive which is intended to drive the driving-in element along the setting axis onto the fastening element, the drive having an electrical capacitor, a squirrel-cage rotor arranged on the driving-in element and an exciter coil through which current flows when the capacitor is rapidly discharged, and a Generates a magnetic field, which accelerates the driving element towards the fastening element, and the setting tool has a control unit which is suitable for carrying out a fuse discharge of the capacitor, in which the excitation coil is not flowed through with current will eat.
  • the control unit can be operated in a normal mode and in a backup mode, the control unit being suitable for carrying out a quick discharge in the normal mode and for carrying out the backup discharge in the backup mode.
  • the setting tool has a detection means for detecting a status parameter of the setting device, with the control unit being provided to switch to the safety mode as a function of the detected status parameter. This makes it possible to discharge the capacitor without ejecting a fastener from the setting tool.
  • the setting tool can preferably be used hand-held. Alternatively, the setting tool can be used in a stationary or semi-stationary manner.
  • a capacitor within the meaning of the invention is to be understood as an electrical component which stores electrical charge and the energy associated therewith in an electrical field.
  • a capacitor has two electrically conductive electrodes between which the electric field builds up when the electrodes are electrically charged differently.
  • a fastening element within the meaning of the invention is to be understood, for example, as a nail, a pin, a clamp, a clip, a bolt, in particular a threaded bolt or the like.
  • An advantageous embodiment is characterized in that the drive has a circuit which includes a discharge switch, the control unit is suitable for closing the discharge switch in normal operation in order to bring about the rapid discharge, and the control unit comprises a safety switch and is suitable for closing the safety switch in the safety operation in order to bring about the safety discharge.
  • the setting tool has a means for detecting a duration during which the capacitor is already electrically charged, the detected state parameter including the detected duration.
  • the control unit preferably has the means for recording the duration.
  • the setting tool has a means for detecting a mechanical load variable of the setting tool, the detected state parameter including the detected load variable of the setting tool.
  • the mechanical load variable recorded is preferably an acceleration of the setting tool, particularly preferably a recoil of the setting tool while a fastening element is being driven into the subsoil.
  • the setting tool has a means for detecting a charging voltage of the capacitor, the detected state parameter including the charging voltage of the capacitor.
  • the control unit is preferably provided to switch to the backup mode when the charging voltage of the capacitor exceeds a predetermined limit voltage.
  • the setting tool has a means for detecting a temperature of an environment and/or of the setting tool, the detected state parameter including the detected temperature.
  • the detected temperature is preferably a temperature of the excitation coil.
  • the setting tool has a means for detecting a removal of a component of the setting tool, the detected state parameter being the absence of the component of the setting tool.
  • the means is preferably suitable for detecting the removal of a housing part or an electric battery of the setting tool.
  • control unit has an electrical resistor through which current flows when the capacitor is discharged as a fuse.
  • the electrical resistance preferably comprises a resistance network.
  • the control unit preferably includes a bidirectional switching converter, which converts a battery current into a capacitor charging current for charging the capacitor and converts a discharging current of the capacitor into a battery charging current for a backup discharge of the capacitor.
  • the bidirectional switching converter particularly preferably comprises one or more rectifier switches which are closed in order to bring about and control the fuse discharge.
  • control unit is suitable for controlling the amount of energy in the current flowing through the excitation coil during the rapid discharge of the capacitor as a function of the detected state parameter.
  • An advantageous embodiment is characterized in that the capacitor is charged with a charging voltage at the beginning of the rapid discharge, the control unit being suitable for controlling the charging voltage.
  • the capacitor is preferably charged in a charging process before the rapid discharge, the charging process being controlled by the control unit.
  • a hand-held setting tool 10 for driving fasteners into a substrate, not shown, is shown.
  • the setting tool 10 has a receptacle 20 designed as a bolt guide, in which a fastening element 30 designed as a nail is accommodated in order to be driven into the ground along a setting axis A (in 1 to the left).
  • the setting tool 10 includes a magazine 40 for feeding fasteners to the receptacle, in which the fasteners are stored individually or in the form of a fastener strip 50 and are gradually transported into the receptacle 20 .
  • the magazine 40 has a spring-loaded feed element, not designated in any more detail.
  • the setting tool 10 has a driving-in element 60 which includes a piston plate 70 and a piston rod 80 .
  • the driving-in element 60 is intended to convey the fastening element 30 out of the receptacle 20 along the setting axis A into the ground.
  • the driving-in element 60 is guided with its piston plate 70 in a guide cylinder 95 along the setting axis A.
  • the driving-in element 60 is in turn driven by a drive which comprises a squirrel-cage rotor 90 arranged on the piston plate 70, an excitation coil 100, a soft-magnetic frame 105, a circuit 200 and a capacitor 300 with an internal resistance of 5 mOhm.
  • the squirrel-cage rotor 90 consists of a preferably ring-shaped, particularly preferably circular ring-shaped element with a low electrical resistance, for example made of copper, and is attached to the piston plate 70 on the side of the piston plate 70 facing away from the receptacle 20, for example soldered, welded, glued, clamped or positively connected.
  • the piston plate itself is designed as a squirrel-cage rotor.
  • the switching circuit 200 is intended to bring about a rapid electrical discharge of the previously charged capacitor 300 and to conduct the discharge current thereby flowing through the excitation coil 100 which is embedded in the frame 105 .
  • the frame preferably has a saturation flux density of at least 1.0 T and/or an effective electrical conductivity of at most 10 6 S/m, so that a magnetic field generated by the exciting coil 100 is amplified by the frame 105 and eddy currents in the frame 105 are suppressed become.
  • the driving-in element 60 with the piston plate 70 dips into an unspecified annular recess of the frame 105 that the squirrel-cage rotor 90 is arranged at a small distance from the excitation coil 100 .
  • an excitation magnetic field which is generated by a change in an electrical excitation current flowing through the excitation coil, penetrates the squirrel-cage rotor 90 and in turn induces a ring-shaped, circulating electrical secondary current in the squirrel-cage rotor 90 .
  • This building up and thus changing secondary current in turn generates a secondary magnetic field which opposes the excitation magnetic field, as a result of which the squirrel-cage rotor 90 experiences a Lorentz force which is repelled by the excitation coil 100 and drives the driving-in element 60 towards the receptacle 20 and the fastening element 30 received therein .
  • the setting tool 10 further comprises a housing 110, in which the drive is accommodated, a handle 120 with an actuating element 130 designed as a trigger, an electrical energy store 140 designed as an accumulator, a control unit 150, a release switch 160, a pressure switch 170, an temperature sensor 180 arranged on frame 105 for detecting a temperature of exciter coil 100 and electrical connecting lines 141, 161, 171, 181, 201, 301, which connect control unit 150 to electrical energy store 140, release switch 160, pressure switch 170, temperature sensor 180, circuit 200 and capacitor 300 respectively.
  • the setting tool 10 is supplied with electrical energy by means of a mains cable instead of the electrical energy store 140 or in addition to the electrical energy store 140 .
  • the control unit includes electronic components, preferably interconnected on a circuit board to form one or more control circuits, in particular one or more microprocessors.
  • control unit 150 When the setting tool 10 is attached to a substrate (not shown) (in 1 left) is pressed, a non-specified pressing element actuates the pressing switch 170, which thereby transmits a pressing signal to the control unit 150 by means of the connecting line 171. Triggered by this, control unit 150 initiates a capacitor charging process, in which electrical energy is conducted from electrical energy store 140 to control unit 150 by means of connecting line 141 and from control unit 150 to capacitor 300 by means of connecting lines 301 in order to charge capacitor 300 .
  • the control unit 150 comprises a switching converter, not designated in any more detail, which converts the electrical current from the electrical energy store 140 into a suitable charging current for the capacitor 300 .
  • the setting tool 10 When the capacitor 300 is charged and the driving element 60 is in its in 1 is in the ready-to-set position shown, the setting tool 10 is in a ready-to-set state. Since the capacitor 300 is only charged when the setting tool 10 is pressed against the ground, a setting process is only possible to increase the safety of bystanders when the setting tool 10 is pressed against the ground. In the exemplary embodiments that are not shown, the control unit already initiates the capacitor charging process when the setting tool is switched on or when the setting tool is lifted off the ground or when a previous driving-in process is completed.
  • the actuating element 130 If the actuating element 130 is actuated when the setting tool 10 is ready to be set, for example by pulling with the index finger of the hand gripping the handle 120, the actuating element 130 actuates the release switch 160, which thereby transmits a release signal to the control unit 150 via the connecting line 161. Triggered by this, the control unit 150 initiates a capacitor discharge process, in which electrical energy stored in the capacitor 300 is conducted from the capacitor 300 to the exciter coil 100 by means of the circuit 200 by discharging the capacitor 300 .
  • the circuit 200 shown schematically comprises two discharge lines 210, 220, which connect the capacitor 300 to the excitation coil 200 and of which at least one discharge line 210 is interrupted by a normally open discharge switch 230.
  • Circuit 200 forms an electrical oscillating circuit with excitation coil 100 and capacitor 300 .
  • This resonant circuit oscillating back and forth and/or negative charging of the capacitor 300 may have a negative effect on the efficiency of the drive, but can be prevented with the aid of a freewheeling diode 240 .
  • Discharge lines 210, 220 are electrically connected to an electrode 310, 320 of capacitor 300, for example by soldering, welding, screwing, clamping or form fit.
  • the discharge switch 230 is preferably suitable for switching a discharge current with a high current intensity and is designed, for example, as a thyristor.
  • the discharge lines 210, 220 are at a small distance from one another, so that a parasitic magnetic field induced by them is as small as possible.
  • the discharge lines 210, 220 are combined to form a bus bar and held together with a suitable means, for example a holder or a clamp.
  • the freewheeling diode is electrically connected in parallel with the discharge switch. In other exemplary embodiments that are not shown, no freewheeling diode is provided in the circuit.
  • the control unit 150 closes the discharge switch 230 by means of the connecting line 201, as a result of which a discharge current of the capacitor 300 flows through the excitation coil 100 at a high current intensity.
  • the rapidly increasing discharge current induces an excitation magnetic field which penetrates the squirrel-cage rotor 90 and in turn induces a ring-shaped circulating electrical secondary current in the squirrel-cage rotor 90 .
  • This secondary current builds up again a secondary magnetic field, which opposes the excitation magnetic field, as a result of which the squirrel-cage rotor 90 experiences a Lorentz force repelling the excitation coil 100, which drives the driving-in element 60 towards the receptacle 20 and the fastening element 30 received therein.
  • the fastening element 30 is driven into the ground by the driving-in element 60 .
  • a braking element 85 made of a resilient and/or damping material, for example rubber, in that the driving element 60 moves with the piston plate 70 against the braking element 85 and is braked by the latter until it comes to a standstill.
  • the driving-in element 60 is returned to the ready-to-set position by a resetting device, which is not specified in more detail.
  • the capacitor 300 in particular its center of gravity, is arranged on the setting axis A behind the driving element 60, whereas the receptacle 20 is arranged in front of the driving element 60.
  • the capacitor 300 is therefore arranged axially offset with respect to the drive-in element 60 and radially overlapping with the drive-in element 60 .
  • a short length of the discharge lines 210, 220 can be achieved, as a result of which their resistances can be reduced and the efficiency of the drive can thus be increased.
  • a small distance between a center of gravity of the setting tool 10 and the setting axis A can be implemented. As a result, tilting moments in the event of a recoil of the setting tool 10 during a driving-in process are low.
  • the capacitor is arranged around the drive-in element.
  • the electrodes 310, 320 are arranged on opposite sides of a carrier film 330 wound around a winding axis, for example by metallization of the carrier film 330, in particular vapor-deposited, with the winding axis coinciding with the setting axis A.
  • the carrier film with the electrodes is wound around the winding axis in such a way that a passage remains along the winding axis.
  • the capacitor is arranged around the setting axis, for example.
  • the carrier film 330 With a charging voltage of the capacitor 300 of 1500 V, the carrier film 330 has a film thickness of between 2.5 ⁇ m and 4.8 ⁇ m, with a charging voltage of the capacitor 300 of 3000 V a film thickness of 9.6 ⁇ m, for example.
  • the carrier film is in turn composed of two or more individual films which are layered on top of one another.
  • the electrodes 310, 320 have a sheet resistance of 50 ohms/ ⁇ .
  • a surface of the capacitor 300 has the shape of a cylinder, in particular a circular cylinder, the cylinder axis of which coincides with the setting axis A.
  • a height of this cylinder in the direction of the winding axis is essentially as great as its diameter measured perpendicularly to the winding axis.
  • a low ratio of the height to the diameter of the cylinder results in a low internal resistance with a relatively high capacitance of the capacitor 300 and last but not least a compact design of the setting tool 10 .
  • a low internal resistance of the capacitor 300 is also achieved by a large line cross section of the electrodes 310, 320, in particular by a high layer thickness of the electrodes 310, 320, with the effects of the layer thickness on a self-healing effect and/or a service life of the capacitor 300 having to be taken into account.
  • the capacitor 300 is mounted on the rest of the setting tool 10 in a damped manner by means of a damping element 350 .
  • the damping element 350 dampens movements of the capacitor 300 relative to the rest of the setting device 10 along the setting axis A.
  • the damping element 350 is arranged on the end face 360 of the capacitor 300 and completely covers the end face 360 .
  • the electrical contacts 370, 380 protrude from the end face 360 and penetrate the damping element 350.
  • the damping element 350 has a clearance through which the electrical contacts 370, 380 protrude.
  • the connecting lines 301 each have a relief and/or expansion loop (not shown in detail).
  • a further damping element is arranged on the capacitor, for example on its end face remote from the receptacle.
  • the capacitor is then preferably clamped between two damping elements, that is to say the damping elements are in contact with the capacitor with a bias voltage.
  • the connecting lines have a rigidity which decreases continuously as the distance from the capacitor increases.
  • the setting tool has a housing (not shown), a handle (not shown) with an actuating element, a receptacle (not shown), a magazine (not shown), a driving element (not shown) and a drive for the driving element.
  • the drive comprises a squirrel-cage rotor, not shown, arranged on the driving element, an excitation coil 410, a soft-magnetic frame, not shown, a Circuit 420, a capacitor 430, an electrical energy store 440 embodied as an accumulator, and a control unit 450 with a switching converter 451 embodied, for example, as a DC/DC transformer.
  • the switching converter 451 has an electrical energy store connected electrically to the electrical energy store 440 connected low-voltage side U LV and an electrically connected to the capacitor 430 high-voltage side U HV .
  • the switching circuit 420 is intended to bring about a rapid electrical discharge of the previously charged capacitor 430 and to conduct the discharge current that flows through the excitation coil 410 .
  • the circuit 420 comprises two discharge lines 421, 422, which connect the capacitor 430 to the excitation coil 420 and of which at least one discharge line 421 is interrupted by a normally open discharge switch 423.
  • a freewheeling diode 424 prevents an excessive oscillation of a resonant circuit formed by the circuit 420 with the excitation coil 410 and the capacitor 430 and prevents the capacitor 430 from being charged negatively.
  • the control unit 450 When the setting tool is pressed against the ground, the control unit 450 initiates a capacitor charging process, in which electrical energy is conducted from the electrical energy store 440 to the switching converter 451 of the control unit 450 and from the switching converter 451 to the capacitor 430 in order to charge the capacitor 430 charge.
  • the switching converter 451 converts the electrical current from the electrical energy store 440 at an electrical voltage of 22 V, for example, into a suitable charging current for the capacitor 430 at an electrical voltage of 1500 V, for example.
  • the control unit 450 initiates a capacitor discharge process, in which electrical energy stored in the capacitor 430 is routed from the capacitor 430 to the excitation coil 410 by means of the circuit 420 by discharging the capacitor 430 .
  • the control unit 450 closes the discharge switch 423 by means of a control line (not shown), as a result of which a discharge current of the capacitor 430 flows through the exciter coil 410 at a high current intensity.
  • the squirrel-cage rotor experiences a Lorentz force that is repelled by the excitation coil 410 and drives the driving element. Thereafter, the driving element is returned to a ready-to-set position by a resetting device (not shown).
  • An amount of energy of the current flowing through the excitation coil 410 during the rapid discharge of the capacitor 430 is controlled by the control unit 450, in particular in a continuously variable manner, by adjusting a charging voltage (U HV ) present at the capacitor 430 during and/or at the end of the capacitor charging process and before the start of the rapid discharge becomes.
  • Electrical energy stored in the charged capacitor 430 and thus also the amount of energy of the current flowing through the excitation coil 410 during the rapid discharge of the capacitor 430 are proportional to the charging voltage and can therefore be controlled by means of the charging voltage.
  • the capacitor is charged during the capacitor charging process until the charging voltage U HV has reached a target value. Then the charging current is switched off. If the charging voltage decreases before the rapid discharge, for example due to parasitic effects, the charging current is switched on again until the charging voltage U HV has reached the target value again.
  • the control unit 450 controls the amount of energy of the current flowing through the excitation coil 410 during the rapid discharge of the capacitor 430 as a function of a number of control variables.
  • the setting tool comprises a means designed as a temperature sensor 460 for detecting a temperature of the excitation coil 410 and a means for detecting a capacitance of the capacitor, which is designed, for example, as a calculation program 470 and the capacitance of the capacitor from a current intensity and an electrical voltage curve of the charging current during the capacitor charging process.
  • the setting tool comprises a means designed as an acceleration sensor 480 for detecting a mechanical load of the setting tool.
  • the setting tool includes a means for detecting a driving depth of the fastener into the ground, which includes an optical, capacitive or inductive proximity sensor 490, for example, which includes a reverse position of the driving element, which is not shown.
  • the setting tool also includes a means for detecting a speed of the driving element, which is a means designed as a first proximity sensor 500 for detecting a first point in time at which the driving element passes a first position during its movement towards the fastening element, a means designed as a second proximity sensor 510 for detecting a second point in time at which the driving-in element passes a second position during its movement towards the fastening element, and a means designed as a calculation program 520 for detecting a time difference between the first point in time and the second point in time.
  • the setting tool comprises an operating element 530 that can be adjusted by a user and a means designed as a barcode reader 540 for detecting a parameter of a fastening element to be driven in.
  • control variables as a function of which control unit 450 controls the amount of energy in the current flowing through excitation coil 410 during the rapid discharge of capacitor 430, include the temperature detected by temperature sensor 460 and/or the capacitance of the capacitor calculated by calculation program 470 and/or the acceleration sensor 480 and/or the driving depth of the fastener detected by proximity sensor 490 and/or the speed of the driving element calculated by calculation program 520 and/or the setting of operating element 530 set by the user and/or that from the bar code reader 540 detected characteristic of the fastener.
  • the structure and the mode of operation of the setting tool essentially correspond to the in 1 shown setting tool 10 match.
  • the setting tool has a driving element and a drive for the driving element.
  • the drive comprises a squirrel-cage rotor (not shown) arranged on the drive-in element, an excitation coil 610, a soft-magnetic frame (not shown), a circuit 620 with a discharge switch 623 and a freewheeling diode 624, a capacitor 630, an electrical energy store (not shown) and a control unit 650 with a Switching converter 651 embodied, for example, as a DC-DC transformer.
  • Switching converter 651 has a low-voltage side 652 electrically connected to the electrical energy store and a high-voltage side 653 electrically connected to capacitor 630 with a plurality of, for example four, rectifier diodes 654.
  • the control unit 650 can be operated in a normal mode and in a backup mode. If the setting tool is pressed against the ground while control unit 650 is being operated in normal operation, control unit 650 initiates a capacitor charging process in which electrical energy is supplied from the electrical energy store to switching converter 651 of control unit 650 and from switching converter 651 to the capacitor 630 to charge the capacitor 630. In order to accelerate the driver towards a fastener, the control unit 650 initiates a fast capacitor discharge process in which the electrical energy stored in the capacitor 630 is routed from the capacitor 630 to the excitation coil 610 by means of the circuit 620 by discharging the capacitor 630 becomes. To the Initiation of the capacitor discharge process, the control unit 650 closes the discharge switch 623 by means of a control line, not shown.
  • the control unit 650 When the control unit 650 switches to the safety mode, the control unit 650 initiates a safety discharge of the capacitor 630, during which no current flows through the excitation coil 610, so that no fastening element is ejected from the setting tool.
  • the control unit 650 in particular the switching converter 651, has a resistor 655 designed as a resistance network and a safety switch 656 connected in series with the resistor 655.
  • the resistor 655 and the fuse switch 656 form a fuse circuit with the capacitor 630 .
  • the control unit 650 closes the fuse switch 656 by means of a control line (not shown). This closes the fuse circuit so that a fuse discharge current flows from the capacitor 630 through the resistor 655 .
  • the electrical energy stored in the charged capacitor is then dissipated in resistor 655, causing resistor 655 to heat up.
  • the control unit 650 switches to the backup mode depending on a number of status parameters.
  • the setting tool comprises a means designed as a temperature sensor 660 for detecting a temperature of the excitation coil 610 and a means for detecting a charging voltage of the capacitor 630, which is designed as a voltmeter 670, for example.
  • the setting tool comprises a means designed as an acceleration sensor 680 for detecting a mechanical load of the setting tool.
  • the setting tool, in particular the control unit 650 includes a means for detecting a duration during which the capacitor 630 is already electrically charged, the means for detecting the duration being designed as a calculation program 690.
  • the setting tool comprises a means designed as a contact sensor 695 for detecting a removal of a housing part or the electric battery of the setting tool.
  • a means for detecting a removal of the electric battery is designed as a voltmeter, which measures an electric voltage of the battery. As soon as the measured voltage falls to 0 V, this is recorded as a removal of the battery.
  • the state parameters include the temperature detected by temperature sensor 660 and/or the charging voltage of the device detected by voltmeter 670 capacitor 630 and/or the load magnitude of the setting tool detected by acceleration sensor 680 and/or the duration calculated by calculation program 690 during which capacitor 630 is already electrically charged, and/or a removal of a housing part or the battery detected by contact sensor 695 .
  • Control unit 650 is provided, for example, to switch to backup mode if the temperature measured by temperature sensor 660 exceeds a specified maximum temperature value and/or the charging voltage of capacitor 660 detected by voltmeter 670 exceeds a specified limit voltage and/or that of acceleration sensor 680 detected acceleration exceeds a specified maximum acceleration value and/or the duration calculated by calculation program 690 during which capacitor 630 is already electrically charged exceeds a specified maximum duration and/or a removal of a housing part or the battery is detected by contact sensor 695.
  • the structure and the mode of operation of the setting tool essentially correspond to the in 1 and or 2 shown setting tool.
  • the setting tool has a driving element and a drive for the driving element.
  • the drive comprises an excitation coil 710, a circuit 720 with a discharge switch 723 and a freewheeling diode 724, a capacitor 730, a control unit 750 with a switching converter 751.
  • the switching converter 751 has a low-voltage side 752 and a high-voltage side 753 with a plurality, for example four, rectifier switches 754, a resistor 755, a safety switch 756 and a charging switch 757.
  • the control unit 750 In order to rectify the charging current for the capacitor 730, the control unit 750 opens and closes the rectifier switches 754 crosswise in pairs when the charging switch 757 is closed. As soon as the capacitor 730 is charged, the control unit 750 opens the charging switch 757 so that the capacitor does not discharge via the switching converter 751.
  • the structure and the mode of operation of the setting tool essentially correspond to the in 1 and or 2 and or 3 shown setting tool.
  • FIG 5 Another electrical circuit diagram 800 of a setting tool, not shown, for driving fasteners into a substrate, not shown, is shown.
  • the setting tool has a driving element and a drive for the driving element.
  • the drive comprises an excitation coil 810, a circuit 820 with a discharge switch 823 and a freewheeling diode 824, a capacitor 830, a control unit 850 with a switching converter 851.
  • the switching converter 851 has a low-voltage side 852 and a high-voltage side 853 with four rectifier switches 854, a resistor 855 and a charging switch 857.
  • control unit 850 When control unit 850 switches to backup mode, control unit 850 initiates a backup discharge of capacitor 830, during which control unit 850 closes at least two of the rectifier switches 854, which are connected in series, preferably all rectifier switches 854, by means of control lines (not shown). As a result, a fuse circuit formed by the capacitor 830, the resistor 855 and the rectifier switches 854 is closed, so that a fuse discharge current flows from the capacitor 830 through the resistor 855. The rectifier switches 854 thus form a safety switch.
  • the charging switch 857 which is connected in parallel with the resistor 855, remains open in the process. The electrical energy stored in the charged capacitor is then dissipated in resistor 855.
  • the structure and the mode of operation of the setting tool essentially correspond to the in 1 and or 2 and or 3 and or 4 shown setting tool.
  • the setting tool has a driving element and a drive for the driving element.
  • the drive comprises an excitation coil 910, a circuit 920 with a discharge switch 923 and a freewheeling diode 924, a capacitor 930, a control unit 950 with a switching converter 951.
  • the switching converter 951 has a low-voltage side 952 and a high-voltage side 953 with four rectifier switches 954 and a charging switch 957 on.
  • the control unit 950 When the control unit 950 switches to the backup mode, the control unit 950 initiates a backup discharge of the capacitor 930, during which the control unit 950 closes the rectifier switches 954 and the charging switch 957 by means of control lines (not shown). As a result, a fuse circuit formed by the capacitor 930, the charging switch 957 and the rectifier switches 954 is closed, so that a fuse discharge current flows from the capacitor 930 through the charging switch 957 and the rectifier switches 954.
  • the charging switch 957 thus forms a safety switch. In a first embodiment, all of the rectifier switches 954 are closed simultaneously. The electrical energy stored in the charged capacitor 930 is then dissipated in the rectifier switches 954 and the charging switch 957.
  • a duration of the discharging process can preferably be set by correspondingly controlling the rectifier switch 954 by the control unit 950.
  • the rectifier switches 954 are alternately cross-closed in pairs such that the fuse discharge current from the switching converter 951 is converted to a battery charging current on the low voltage side 952 .
  • An electric battery connected to the low voltage side 952 is then energized and charged.
  • the electrical energy stored in the charged capacitor 930 is therefore stored in the battery and can be reused in further operation of the setting tool.
  • the switching converter 951 is designed as a bidirectional switching converter.
  • the structure and the mode of operation of the setting tool essentially correspond to the in 1 and or 2 and or 3 and or 4 and or figure 5 shown setting tool.

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  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Claims (13)

  1. Outil de pose (10) pour enfoncer des éléments de fixation dans un substrat, notamment outil de pose manuel, présentant un logement (20) prévu pour recevoir un élément de fixation (30), un élément d'enfoncement (60) prévu pour déplacer un élément de fixation (30) reçu dans le logement (20) le long d'un axe de pose (A) dans le substrat, un entraînement prévu pour entraîner l'élément d'enfoncement (60) le long de l'axe de pose (A) vers l'élément de fixation (30), l'entraînement présentant un condensateur électrique (300), un rotor de court-circuit (90) agencé sur l'élément d'enfoncement (60) et une bobine d'excitation (100) qui est parcourue par un courant lors d'une décharge rapide du condensateur (300) et produit un champ magnétique, qui accélère l'élément d'enfoncement (60) vers l'élément de fixation (30), et l'outil de pose (10) présentant une unité de commande (150) qui peut fonctionner dans un mode normal et dans un mode de sécurité et qui est adaptée pour effectuer une décharge rapide dans le mode normal et pour effectuer une décharge de sécurité du condensateur (300) dans le mode de sécurité, dans laquelle la bobine d'excitation (100) n'est pas parcourue par un courant, caractérisé en ce que l'outil de pose (10) présente un moyen de détection pour détecter un paramètre d'état de l'outil de pose (10), l'unité de commande (150) étant prévue pour passer en mode de sécurité en fonction du paramètre d'état détecté.
  2. Outil de pose selon la revendication 1, dans lequel l'entraînement présente un circuit de commutation (200) qui comprend un commutateur de décharge (230), dans lequel l'unité de commande (150) est adaptée pour fermer le commutateur de décharge (230) dans le mode normal afin de provoquer la décharge rapide, et dans lequel l'unité de commande (150) comprend un commutateur de sécurité (656) et est adaptée pour fermer le commutateur de sécurité (656) dans le mode de sécurité afin de provoquer la décharge de sécurité.
  3. Outil de pose selon l'une quelconque des revendications précédentes, dans lequel l'outil de pose (10), notamment l'unité de commande (150), présente un moyen pour détecter une durée pendant laquelle le condensateur (300) est déjà chargé électriquement, et dans lequel le paramètre d'état détecté comprend la durée détectée.
  4. Outil de pose selon l'une quelconque des revendications précédentes, dans lequel l'outil de pose (10) présente un moyen pour détecter une grandeur de sollicitation mécanique, notamment une accélération, de l'outil de pose, et dans lequel le paramètre d'état détecté comprend la grandeur de sollicitation détectée, notamment une accélération, de l'outil de pose.
  5. Outil de pose selon l'une quelconque des revendications précédentes, dans lequel l'outil de pose (10) présente un moyen pour détecter une tension de charge du condensateur (300), et dans lequel le paramètre d'état détecté comprend la tension de charge du condensateur.
  6. Outil de pose selon la revendication 5, dans lequel l'unité de commande (150) est prévue pour passer en mode de sécurité lorsque la tension de charge du condensateur (300) dépasse une tension limite prédéterminée.
  7. Outil de pose selon l'une quelconque des revendications précédentes, dans lequel l'outil de pose (10) présente un moyen pour détecter une température d'un environnement et/ou de l'outil de pose (10), notamment de la bobine d'excitation (100), dans lequel le paramètre d'état détecté comprend la température détectée.
  8. Outil de pose selon l'une quelconque des revendications précédentes, dans lequel l'outil de pose (10) présente un moyen pour détecter un enlèvement d'un composant de l'outil de pose (10), notamment d'une partie de boîtier ou d'une batterie électrique, dans lequel le paramètre d'état détecté est l'absence du composant de l'outil de pose (10).
  9. Outil de pose selon l'une quelconque des revendications précédentes, dans lequel l'unité de commande (150) présente une résistance électrique (655) qui est parcourue par un courant lors de la décharge de sécurité du condensateur (300).
  10. Outil de pose selon la revendication 9, dans lequel la résistance électrique (655) comprend un réseau de résistances.
  11. Outil de pose selon l'une quelconque des revendications précédentes, dans lequel l'outil de pose (10) présente une batterie électrique qui est parcourue par un courant et chargée lors de la décharge de sécurité du condensateur (300).
  12. Outil de pose selon la revendication 11, dans lequel l'unité de commande (150) comprend un convertisseur de commutation bidirectionnel (751) qui convertit un courant de batterie en un courant de charge de condensateur pour une charge du condensateur (300) et qui convertit un courant de décharge du condensateur (300) en un courant de charge de batterie pour une décharge de sécurité du condensateur (300).
  13. Outil de pose selon la revendication 12, dans lequel le convertisseur de commutation bidirectionnel (751) comprend un ou plusieurs commutateurs redresseurs (754) qui sont fermés pour provoquer la décharge de sécurité.
EP19726426.0A 2018-06-06 2019-05-29 Appareil de pose Active EP3801990B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP18176196.6A EP3578311A1 (fr) 2018-06-06 2018-06-06 Appareil de pose
PCT/EP2019/063918 WO2019233841A1 (fr) 2018-06-06 2019-05-29 Dispositif de pose

Publications (2)

Publication Number Publication Date
EP3801990A1 EP3801990A1 (fr) 2021-04-14
EP3801990B1 true EP3801990B1 (fr) 2023-03-29

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EP18176196.6A Withdrawn EP3578311A1 (fr) 2018-06-06 2018-06-06 Appareil de pose
EP19726426.0A Active EP3801990B1 (fr) 2018-06-06 2019-05-29 Appareil de pose

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP18176196.6A Withdrawn EP3578311A1 (fr) 2018-06-06 2018-06-06 Appareil de pose

Country Status (6)

Country Link
US (1) US11986939B2 (fr)
EP (2) EP3578311A1 (fr)
JP (1) JP7109138B2 (fr)
AU (1) AU2019281994A1 (fr)
TW (1) TWI829701B (fr)
WO (1) WO2019233841A1 (fr)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3578305A1 (fr) * 2018-06-06 2019-12-11 HILTI Aktiengesellschaft Appareil de pose
EP3578316A1 (fr) * 2018-06-06 2019-12-11 HILTI Aktiengesellschaft Appareil de pose
EP3578308A1 (fr) * 2018-06-06 2019-12-11 HILTI Aktiengesellschaft Appareil de pose
EP3838494A1 (fr) * 2019-12-20 2021-06-23 Hilti Aktiengesellschaft Appareil de travail
EP4370283A1 (fr) 2021-07-10 2024-05-22 Rhefor GbR Outil de pose

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS531945B2 (fr) * 1972-06-17 1978-01-24
DE2238440A1 (de) * 1972-08-04 1974-02-14 Otto Springmann Elektrisches schlagbolzengeraet
US6830173B2 (en) * 2000-08-25 2004-12-14 Senco Products, Inc. Impact device
DE102010030059A1 (de) * 2010-06-15 2011-12-15 Hilti Aktiengesellschaft Handgeführtes Eintreibgerät
CN103391832A (zh) * 2011-02-28 2013-11-13 日立工机株式会社 电动工具和驱动电动工具的方法
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
EP2826599A1 (fr) * 2013-07-16 2015-01-21 HILTI Aktiengesellschaft Procédé de commande et machine-outil manuelle
EP3653342B1 (fr) * 2018-10-26 2024-01-17 Max Co., Ltd. Outil électrique

Also Published As

Publication number Publication date
US20210229251A1 (en) 2021-07-29
JP7109138B2 (ja) 2022-07-29
WO2019233841A1 (fr) 2019-12-12
JP2021525180A (ja) 2021-09-24
EP3801990A1 (fr) 2021-04-14
TWI829701B (zh) 2024-01-21
US11986939B2 (en) 2024-05-21
TW202000391A (zh) 2020-01-01
EP3578311A1 (fr) 2019-12-11
AU2019281994A1 (en) 2020-11-26

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