EP4201597A1 - Dispositif et procédé d'enfoncement - Google Patents

Dispositif et procédé d'enfoncement Download PDF

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Publication number
EP4201597A1
EP4201597A1 EP21217420.5A EP21217420A EP4201597A1 EP 4201597 A1 EP4201597 A1 EP 4201597A1 EP 21217420 A EP21217420 A EP 21217420A EP 4201597 A1 EP4201597 A1 EP 4201597A1
Authority
EP
European Patent Office
Prior art keywords
cylindrical container
driving
cylinder axis
driving element
bolt receptacle
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.)
Withdrawn
Application number
EP21217420.5A
Other languages
German (de)
English (en)
Inventor
Karl Franz
Philipp Ellmann
Rene Wohlwend
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
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Priority to EP21217420.5A priority Critical patent/EP4201597A1/fr
Priority to PCT/EP2022/085012 priority patent/WO2023117467A1/fr
Publication of EP4201597A1 publication Critical patent/EP4201597A1/fr
Withdrawn legal-status Critical Current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
    • B25C1/00—Hand-held nailing tools; Nail feeding devices
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B25C1/044—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure with movable main cylinder
    • 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
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B25C1/047—Mechanical details

Definitions

  • the application relates to a device and a method for driving a fastener into a substrate.
  • Driving springs which work on the principle of a gas spring.
  • the energy transmission element In order to tension such drive-in springs, the energy transmission element is pushed into a container of the gas spring.
  • the energy transmission element In order to be driven, the energy transmission element may require a special geometry, which can impair the mechanical robustness of the energy transmission element.
  • a device for driving a fastener into a substrate having a bolt receptacle for the fastener and a driving element that can be moved between an initial position and a setting position onto the bolt receptacle, the device having a cylindrical container that defines a cylinder axis, and wherein the driving element comprises a piston which is arranged in the cylindrical container movably along the cylinder axis, so that the piston closes off a partial volume of the cylindrical container and a gas arranged in the closed partial volume of the cylindrical container forms a gas spring.
  • the cylindrical container can be moved along the cylinder axis toward the bolt receptacle when the driving-in element is in the starting position.
  • An advantageous embodiment is characterized by a drive which drives the cylindrical container for tensioning the gas spring along the cylinder axis from a relaxed position into a clamped position towards the bolt receptacle.
  • the drive also drives the cylindrical container from the clamped position into the unclamped position.
  • the cylindrical container particularly preferably comprises a driver which takes the driving element from the setting position into the starting position.
  • an electrical energy store such as an accumulator or a battery, which supplies the drive with electrical energy.
  • An advantageous embodiment is characterized by a coupling device for temporarily holding the driving-in element in the starting position.
  • the coupling device preferably comprises a locking element that can be moved transversely to the cylinder axis, an inner sleeve aligned along the cylinder axis with a cutout running transversely to the setting axis for receiving the locking element, and an outer sleeve surrounding the inner sleeve with a support surface for supporting the locking element.
  • the support surface is particularly preferably inclined at an acute angle relative to the cylinder axis.
  • the coupling device also preferably comprises a restoring spring which acts on the outer sleeve with a force in the direction of the cylinder axis.
  • the driving-in element also preferably has a recess, into which the locking element engages, in order to hold the driving-in element in the starting position to hold on.
  • the cylindrical container also preferably has an actuating element which actuates the coupling device.
  • the object is also achieved with a method for driving a fastener into a substrate, by means of a device having a bolt receptacle for the fastener and a driving element that can be moved toward the bolt receptacle between an initial position and a setting position, the device having a cylindrical container which has a Defined cylinder axis, and wherein the driving element comprises a piston which is arranged in the cylindrical container movably along the cylinder axis, so that the piston closes off a partial volume of the cylindrical container and a gas arranged in the closed partial volume of the cylindrical container forms a gas spring. To tension the gas spring, the cylindrical container is moved along the cylinder axis towards the bolt receptacle, while the driving element is in the starting position.
  • the driving-in device 10 for driving a fastener, such as a nail or bolt, into a substrate in a side view.
  • the driving-in device 10 has a driving-in element, not shown, for transmitting energy to the fastening element, and a housing 20, in which the driving-in element and a conveying device, also not shown, for conveying the driving-in element are accommodated.
  • the driving device 10 also has a handle 30 , a magazine 40 and a bridge 50 connecting the handle 30 to the magazine 40 .
  • a scaffolding hook 60 for suspending the driving-in device 10 on scaffolding or the like and an electrical energy store designed as an electric battery 590 are fastened to the bridge 50 .
  • a trigger 34 and a grip sensor designed as a manual switch 35 are arranged on the grip 30 .
  • the driving-in device 10 has a guide channel 700 for guiding the fastening element and a pressing device 750 for detecting whether the driving-in device 10 is pressed against a substrate (not shown). Alignment of the driving-in device perpendicular to the ground is supported by an alignment aid 45 .
  • the conveying device 70 comprises a gas spring 200, shown schematically, and a drive 300 for tensioning the gas spring 200, for example by means of a spindle drive.
  • the drive 300 includes an electric motor 800 for converting electrical energy from the battery 590 into rotational energy.
  • a device 100 for driving a fastener into a substrate is shown schematically in successive operating phases.
  • the device 100 has a bolt receptacle 110 for fastening elements, not shown, which are formed, for example, as nails, bolts, pins or rivets.
  • the device 100 has a starting position ( Figures 4 and 5 ) and a set position ( Figures 3 and 6 ) on the bolt receptacle 110 to be movable drive-in element 120.
  • the driving-in element 120 has a peripheral and peripheral depression 121 on its circumference in the vicinity of its end facing the bolt receptacle 110 .
  • the device 100 has a cylindrical container 130 which defines a cylinder axis 135 .
  • the cylindrical container 130 has projections 131 which are arranged one behind the other in the direction of the cylinder axis 135 in the manner of a toothed rack on an outside of the cylindrical container 130 .
  • the driving-in element 120 comprises a piston (not shown) which is arranged in the cylindrical container 130 so as to be movable along the cylinder axis 135 .
  • the cylindrical container 130 has a double-walled construction. In exemplary embodiments that are not shown, the cylindrical container has a single-walled structure.
  • the device 100 has a drive 140 with a motor 142 and a gear wheel 145, the gear wheel 145 being mounted on a motor shaft 143 of the motor 142 in a rotationally fixed manner.
  • the gear 145 engages with its teeth between the projections 131 of the cylindrical container 130, so that a rotational movement of the motor shaft 143 is translated into a linear movement of the cylindrical container 130 along the cylinder axis 135 towards the bolt receptacle 110 and/or away from the bolt receptacle 110 .
  • Guide elements 132 serve to guide the cylindrical container 130 during such a linear movement along the cylinder axis 135 between a clamping position ( Figures 3, 5 and 6 ) and a relaxed position ( 4 ).
  • the drive 140 is supplied with electrical energy from an electrical energy store, not shown, such as a rechargeable battery or a battery. Furthermore, the device 100 has a coupling device 150 for temporarily holding the driving-in element 120 in the starting position.
  • a method for driving a fastener into a substrate with the device 100 comprises the following steps. First ( 3 ), for example after the device 100 has been switched on or after a driving-in process has taken place, the driving-in element 120 is in the setting position and the cylindrical container 130 is in the clamping position. Because the driver 120 is in the set position, the gas spring within the cylindrical canister 130 is in a relaxed state.
  • a first step ( 4 ) the motor 142 drives the motor shaft 143 and thus the gear 145 counterclockwise.
  • gear 145 engagement between the projections 131 the cylindrical container 130 is conveyed to the unclamping position.
  • the driving-in element 120 is conveyed into the initial position by means of a driver (not shown).
  • the clutch device 150 engages the recess 121 on the driver 120 to temporarily hold the driver 120 in the home position.
  • step ( figure 5 ) the motor 142 drives the motor shaft 143 and thus the gear wheel 145 in a clockwise direction.
  • the cylindrical container 130 is conveyed to the clamping position, while the driving element 120 is held by the clutch device 150 in the initial position.
  • the gas spring located in the closed partial volume above the piston of the drive-in element 120 is compressed and tensioned. Due to the fact that the driving element 120 does not move during the tensioning process, it is possible to decompress the gas spring by the reverse movement of the cylindrical container without moving the driving element 120 . It is thus possible, for example, to remove a jammed fastening element from the bolt receptacle 110 without fearing that the drive-in element 120 will inadvertently accelerate towards the bolt receptacle.
  • step ( 6 ) a deduction not shown, for example the one in 1 illustrated trigger 34 drawn by a user of the device 100.
  • the clutch device 150 releases the driving element 120, while the cylindrical container 130 is held in the clamped position by the gear wheel 145.
  • the driving-in element 120 is accelerated by the relaxing gas spring toward the bolt receptacle 110 in order to drive a fastening element arranged therein into the ground.
  • a cam drive, a spindle drive and/or a worm gear is used instead of the gear drive with or without a gear.
  • the cylindrical container itself is threaded and driven like a screw, for example by a recirculating ball nut.
  • FIG. 7 and 8 is a driving element 220 in a longitudinal section ( 7 ) or in a supervision ( 8 ) shown.
  • the driving-in element 220 comprises a piston 225 and a piston 225 protruding along a cylinder axis 235 Piston rod 226.
  • a front end 227 of the piston rod 226 is intended to meet a fastening element in order to drive it into a substrate.
  • the front end 227 has a guide contour for improved guidance of the fastening element.
  • the piston 225 has two guide elements 228 each arranged in a circumferential groove and a seal 229 likewise arranged in a circumferential groove.
  • the guide elements 228 are ring-shaped and are used for guided movement of the piston 225 within a cylindrical container (not shown).
  • the seal 229 is also ring-shaped and serves to seal the movement of the piston 225 within the cylindrical container.
  • the drive-in element 220 has a rotationally symmetrical shape and is constructed more robustly than a drive-in element with a drive contour such as a toothed rack.
  • a drive contour such as a toothed rack.
  • a long service life is achieved for the driving element.
  • FIG. 9 to 12 Another exemplary embodiment of a device 301 for driving a fastening element into a substrate in successive operating phases is shown in detail in a longitudinal section.
  • the device 301 has a bolt receptacle 310, between an initial position ( Figures 9 to 11 ) and a set position ( 12 ) on the bolt receptacle 310 to be movable drive-in element 320 with a peripheral and circumferential recess 321 and a cylindrical container 330 with a cylinder axis 335.
  • the driving-in element 320 comprises a piston 325 which is arranged in the cylindrical container 330 so as to be movable along the cylinder axis 335 . This includes the piston 325 in the Figures 9 to 12 right partial volume of the cylindrical container 330, in which a gas spring 337 is formed.
  • the gas spring 337 is preferably already in the relaxed state under a pre-pressure of, for example, 80 bar. In the tensioned state of the gas spring, the pressure is then, for example, 150 bar. Due to the high admission pressure, a compact design of the device is possible even with high driving energy.
  • the driving element 320 and the cylindrical container 330 preferably together form a unit which is simple can be exchanged, for example to counteract possible piston breakage, tip wear or seal wear and the associated loss of performance, or to change the driving energy by means of different gas springs and open up additional areas of application.
  • An assembly and disassembly of the cylindrical container and optionally the drive-in element is preferably carried out on the side of a housing of the device facing away from the bolt receptacle.
  • the cylindrical container 330 has, on its end face 336 facing the bolt receptacle 310, a driver 332, which takes the driving element 320 with it from its set position into the starting position.
  • the driver 332 also serves as a buffer for the driving element 320 and has an elastic material such as an elastomer for this purpose.
  • the cylindrical container 330 has a guide element 333 for the driving element and ventilation openings 334 on its end face 336 facing the bolt receptacle 310 .
  • the cylindrical container 330 is closed on the end face facing away from the bolt receptacle 310 .
  • the device 301 has a coupling device 350 for temporarily holding the driving-in element 120 in the starting position.
  • the coupling device 350 comprises three spherical locking elements 351 that can be moved transversely to the cylinder axis 335 and an inner sleeve 352 aligned along the cylinder axis 335 with three recesses 353 running transversely to the cylinder axis 335.
  • the locking elements 351 are each accommodated in one of the recesses 353 and engage in the circumferential depression 321 of the driving element 320 in order to hold the driving element 320 in the initial position.
  • the locking elements 351 are preferably evenly distributed around the cylinder axis 335.
  • the coupling device comprises one, two, four or more locking elements.
  • the coupling device 350 comprises an outer sleeve 354 which encompasses the inner sleeve 352 and has a peripheral support surface 355 for supporting the locking elements 351 directed radially inwards.
  • the support surface 355 is inclined relative to the cylinder axis 335 at an acute angle.
  • the coupling device 350 comprises a restoring spring 356 which acts on the outer sleeve 354 with a force in the direction of the cylinder axis 335. That of the bolt receptacle 310
  • the facing end face 336 of the cylindrical container 330 forms an actuating element which actuates the clutch device 350 .
  • the cylindrical container 330 is first transported to the unclamping position ( 9 ).
  • the driver 332 moves the driving-in element 320 into the starting position.
  • the locking elements 351 then engage in the peripheral recess 321 on the driving element 320 and hold the driving element 320 in the starting position.
  • the locking elements 351 are supported by the outer sleeve 354 against movement radially outwards, the outer sleeve 354 in turn being pushed by the return spring 356 into the in 9 shown position is biased.
  • a subsequent step ( 10 ) the cylindrical container 330 is conveyed to the clamping position, while the driving element 320 is held in the starting position by the clutch device 350.
  • the gas spring 337 located in the closed partial volume to the right of the piston 325 is compressed and tensioned.
  • the end face 336 of the cylindrical container 330 is then in axial contact with the outer sleeve 354 .
  • the coupling device 350 remains in position during this process.
  • step ( 11 ) is triggered by pulling a trigger (not shown) of the device 301, the cylindrical container 330 is moved further towards the bolt receptacle 310 by a triggering distance of, for example, a few millimeters.
  • the cylindrical container 330 actuates the coupling device 350 with its end face 336, which acts as an actuating element, in that the end face 336 moves the outer sleeve 354 toward the bolt receptacle 310 against a restoring force of the restoring spring 356.
  • the support surface 355 which is inclined relative to the cylinder axis 335, allows the locking elements 351 sufficient freedom of movement radially outwards, the locking elements 351 release the driving element 320.
  • the clutch device is released mechanically by pulling the trigger.
  • the coupling device comprises a bolt arranged in front of an end face of the driving element facing the bolt receptacle, which bolt is moved out of the movement path of the driving element by pulling the trigger in order to release the driving element.
  • a driving-in device additionally has a spacer, which is arranged between the cylindrical container and the coupling device.
  • An axial position of the spacer relative to the coupling device can be adjusted by means of an operating element such as an adjusting wheel in order to influence the clamping position of the cylindrical container and thus the compression of the gas spring.
  • a driving-in device has a friction brake, which withdraws energy from the driving-in element through friction in order to adjust the driving-in energy.
  • the driving-in energy can be set to a desired value by regulating the force with which the friction brake is in contact with the moving driving-in element.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP21217420.5A 2021-12-23 2021-12-23 Dispositif et procédé d'enfoncement Withdrawn EP4201597A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP21217420.5A EP4201597A1 (fr) 2021-12-23 2021-12-23 Dispositif et procédé d'enfoncement
PCT/EP2022/085012 WO2023117467A1 (fr) 2021-12-23 2022-12-08 Appareil d'entraînement et procédé d'entraînement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21217420.5A EP4201597A1 (fr) 2021-12-23 2021-12-23 Dispositif et procédé d'enfoncement

Publications (1)

Publication Number Publication Date
EP4201597A1 true EP4201597A1 (fr) 2023-06-28

Family

ID=79164655

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21217420.5A Withdrawn EP4201597A1 (fr) 2021-12-23 2021-12-23 Dispositif et procédé d'enfoncement

Country Status (2)

Country Link
EP (1) EP4201597A1 (fr)
WO (1) WO2023117467A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005000107B4 (de) * 2005-08-25 2014-03-13 Hilti Aktiengesellschaft Pneumatisch betriebenes Setzgerät
EP2851157A1 (fr) * 2013-09-19 2015-03-25 HILTI Aktiengesellschaft Dispositif d'entraînement avec accumulateur pneumatique
US20150202755A1 (en) * 2012-09-28 2015-07-23 Hitachi Koki Co., Ltd. Driver
WO2020214558A1 (fr) * 2019-04-17 2020-10-22 Milwaukee Electric Tool Corporation Dispositif d'entraînement d'élément de fixation excité

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005000107B4 (de) * 2005-08-25 2014-03-13 Hilti Aktiengesellschaft Pneumatisch betriebenes Setzgerät
US20150202755A1 (en) * 2012-09-28 2015-07-23 Hitachi Koki Co., Ltd. Driver
EP2851157A1 (fr) * 2013-09-19 2015-03-25 HILTI Aktiengesellschaft Dispositif d'entraînement avec accumulateur pneumatique
WO2020214558A1 (fr) * 2019-04-17 2020-10-22 Milwaukee Electric Tool Corporation Dispositif d'entraînement d'élément de fixation excité

Also Published As

Publication number Publication date
WO2023117467A1 (fr) 2023-06-29

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