EP3233380A1 - Appareil d'enfoncement muni d'un passage dans une chambre de combustion - Google Patents

Appareil d'enfoncement muni d'un passage dans une chambre de combustion

Info

Publication number
EP3233380A1
EP3233380A1 EP15813796.8A EP15813796A EP3233380A1 EP 3233380 A1 EP3233380 A1 EP 3233380A1 EP 15813796 A EP15813796 A EP 15813796A EP 3233380 A1 EP3233380 A1 EP 3233380A1
Authority
EP
European Patent Office
Prior art keywords
combustion chamber
control rod
recess
guide gap
tacker according
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Withdrawn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
EP15813796.8A
Other languages
German (de)
English (en)
Inventor
Norbert Heeb
Tilo Dittrich
Peter STAUSS-REINER
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
Publication of EP3233380A1 publication Critical patent/EP3233380A1/fr
Withdrawn legal-status Critical Current

Links

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
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure

Definitions

  • the invention relates to a tacker, in particular a hand-held tacker, according to the preamble of claim 1.
  • DE 102 26 878 A1 describes a tacker for driving a nail into a workpiece, in which a combustion chamber is charged with a fuel gas, wherein after a firing process, a driving piston is accelerated against the nail.
  • the combustion chamber has an adjustable combustion chamber floor, wherein an adjusting rod is guided by means of a passage through a housing of the combustion chamber and is connected to the adjustable combustion chamber floor. It is the object of the invention to provide a tacker that allows a particularly reliable operation even at low ambient temperatures.
  • a guide gap in the context of the invention is understood to be the smallest distance between the implementation and the control rod at normal ambient temperature.
  • a defined gap is provided to prevent seizure of the parts.
  • additional soft elastic seals for example made of rubber or other materials, may be provided on the bushing, but by way of which the guide gap is not defined.
  • the radial size of the guide gap is defined in the present sense at centered position of the control rod in the implementation, so that the gap is circumferentially present around the control rod.
  • the guide gap in practice is usually so small that water can be drawn capillary into the gap and held.
  • a typical size of the guide gap is less than 0.1 mm.
  • the distance between the control rod and the bushing in the region of the recess is at least twice, in particular at least four times, the height of the guide gap. This is preferably to be understood as the maximum distance of the recess from the control rod with a corresponding axial position of the control rod. Particularly preferably, this axial position of the control rod is a rest position or starting position before initiation of a driving operation.
  • An absolute size of the distance is preferably more than 0.1 mm, preferably more than 0.3 mm.
  • At least two, in particular at least three, recesses are provided in succession over the axial length of the bushing.
  • a plurality of sections are formed, in which over a short axial length a guide is achieved with a small guide gap, wherein there are anhydrous recesses between sections.
  • a recess is formed on both actuating rod and bushing, which in the radial direction in each case springs back behind a radius allocated to the guide gap, that is, on the actuating rod inwards and outwards on the bushing.
  • One of the recesses, preferably the recess on the adjusting rod, is preferably formed over its axial length as a continuous taper. As a result, a total accumulation of water at least one initial position of the control rod is comprehensively avoided while still ensuring adequate guidance.
  • the axial extent of the recess above the control rod is preferably shorter, substantially the same length or only slightly longer, in particular not more than twice as long, as the axial length of the bushing.
  • a chamfer may be formed at one end of the recess. By such a chamfer or chamfer of hooking of opposite recesses is avoided at their edges.
  • a swirl plate is fixed to the control rod within the combustion chamber. Such a swirl plate is moved shortly before ignition of the combustion chamber by means of the control rod through the combustion chamber to cause a better mixing of fuel gas and air.
  • an adjustable bottom of the combustion chamber is fixed to the control rod.
  • the combustion chamber can be collapsed, for example, as part of a safety device, if the device is not properly placed on a workpiece.
  • an adjustable combustion chamber wall is fixed to the control rod.
  • the combustion chamber wall is designed as a sleeve. With the help of such a combustion chamber wall, the combustion chamber can be opened, for example, for flushing the combustion chamber with fresh air and closed again.
  • FIG. 1 shows a schematic view of a tacker according to the invention in three different operating states.
  • Fig. 2 shows a sectional view of a passage according to a first
  • Fig. 3 shows a sectional view of a passage according to a second
  • Embodiment of the invention. 1 comprises a housing 1 of a combustion chamber and a cylinder 2 adjacent to the combustion chamber 1 with a driving piston 3 guided therein.
  • a safety mechanism of the device comprises an attachment sleeve 4, which is placed on a workpiece 5 and is pressed against the pressure of a spring 6. Only in this state, a driving operation can be triggered by igniting a fuel gas in the combustion chamber.
  • a swirl plate 7 is also arranged, which is fixedly connected to an actuating rod 8.
  • the control rod 8 passes through the wall of the combustion chamber housing 1 via a bushing 9 arranged in the wall. In this way, the swirl plate 7 can be moved from the outside via the control rod 8 in the combustion chamber 1.
  • the control rod 8 is connected schematically to the spring 6. The impressions of the attachment sleeve 4 initially tensions the spring 6, wherein the adjustment rod 8 is held in place by a mechanism, not shown.
  • control rod 8 is stuck by ice formation in a guide gap 10 in the bushing 9 and has too large breakaway torque.
  • implementation 9 and control rod 8 are shown schematically and in a conventional manner.
  • the bushing 9 has an axial length L.
  • the guide gap 10 has a substantially smaller axial length Lf.
  • the remaining part of the length L of the bushing 9 has a radially outwardly projecting recess 11.
  • the control rod 8 has a radially inwardly tapered recess 12, whose axial length corresponds approximately to La as well.
  • the position of the control rod 8 in Fig. 2 corresponds to an initial or rest position as in the left figure of Fig. 1 (initial state, the vortex plate is located at a front stop).
  • the recesses cover 1 1, 12 in the region of the implementation, so that here there is a large radial distance between the surfaces of the control rod 8 and 9 implementation.
  • the distance is significantly greater than the guide gap and causes no water capillary spread over the length of the recesses La. Insofar as drops of water are in the region of the surfaces in the recesses 11, 12, their freezing does not lead to a blockage of the adjusting rod 8.
  • the leadership of the control rod 8 is improved in that 9 several, but shorter recesses 1 1 are arranged in the axial direction one behind the other at the implementation.
  • the entire axial length of the bushing 9 is unchanged from the first embodiment.
  • the radially inwardly projecting recess 12 on the side of the control rod 8 has, in contrast to the first embodiment at their ends chamfers or bevels 13. This prevents snagging or combing of the recess 12 with the ends of the bushing 9.
  • FIG. 3 shows the control rod in its initial position in which freezing is effectively avoided by attached water or reduced in its surface.
  • the actuating rod of the second exemplary embodiment has a somewhat increased radial play in the bushing. This is immaterial at the beginning of the accelerated movement of the vortex plate.
  • control rod is shifted by one way to the left, so that the recesses 1 1, 12 of control rod 8 and 9 no longer cover.
  • a state of optimal guidance is achieved, and the radial clearance is limited by the guide gap.
  • the ignition of the fuel gas takes place, so that a good seal against the gas pressure is ensured.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

L'invention concerne un appareil d'enfoncement comprenant un piston d'enfoncement (3) guidé dans un cylindre (2) et servant à enfoncer un élément de type clou dans une pièce (5), et une chambre de combustion (1) agencée au-dessus du piston d'enfoncement (3) et pouvant être remplie d'un gaz combustible. Une tige de commande (8) mobile pénètre dans un passage (9) sur une longueur (L) axiale dans un carter de la chambre de combustion (1), et une fente de guidage (10) est réalisée entre la tige de commande (8) et le passage (9). Un évidement (11, 12) est réalisé au niveau de la tige de commande (8) et/ou du passage (9), un écartement radial entre la tige de commande (8) et le passage (9) dans la zone de l'évidement (11, 12) étant plus grand que la hauteur radiale de la fente de guidage (10).
EP15813796.8A 2014-12-19 2015-12-16 Appareil d'enfoncement muni d'un passage dans une chambre de combustion Withdrawn EP3233380A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14199199.2A EP3034240A1 (fr) 2014-12-19 2014-12-19 Appareil d'enfoncement doté d'un guide dans une chambre de combustion
PCT/EP2015/079945 WO2016096953A1 (fr) 2014-12-19 2015-12-16 Appareil d'enfoncement muni d'un passage dans une chambre de combustion

Publications (1)

Publication Number Publication Date
EP3233380A1 true EP3233380A1 (fr) 2017-10-25

Family

ID=52103090

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14199199.2A Withdrawn EP3034240A1 (fr) 2014-12-19 2014-12-19 Appareil d'enfoncement doté d'un guide dans une chambre de combustion
EP15813796.8A Withdrawn EP3233380A1 (fr) 2014-12-19 2015-12-16 Appareil d'enfoncement muni d'un passage dans une chambre de combustion

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP14199199.2A Withdrawn EP3034240A1 (fr) 2014-12-19 2014-12-19 Appareil d'enfoncement doté d'un guide dans une chambre de combustion

Country Status (4)

Country Link
US (1) US20170334051A1 (fr)
EP (2) EP3034240A1 (fr)
JP (1) JP2017538594A (fr)
WO (1) WO2016096953A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3034238A1 (fr) * 2014-12-19 2016-06-22 HILTI Aktiengesellschaft Appareil d'enfoncement doté de chambre de combustion réglable

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2548014C2 (de) * 1975-10-27 1984-01-12 Hilti AG, 9494 Schaan Pulverkraftbetriebenes Setzgerät mit Leistungsregulierung
JPS565630Y2 (fr) * 1976-05-18 1981-02-06
DE3236748C2 (de) * 1982-10-05 1994-05-19 Black & Decker Inc Elektrisch angetriebener Tacker
DE9305760U1 (de) * 1993-04-16 1993-06-17 Joh. Friedrich Behrens AG, 2070 Ahrensburg Auslösesicherung an einem Eintreibgerät für Befestigungsmittel
US5645208A (en) * 1995-10-17 1997-07-08 Haytayan; Harry M. Pneumatic fastening tool with safety interlock
DE19962597C2 (de) * 1999-12-23 2002-07-04 Hilti Ag Tragbares, brennkraftbetriebenes Arbeitsgerät und Verfahren zum Bereitstellen eines Gasgemisches in seiner Brennkammer
DE10032310C2 (de) * 2000-07-04 2003-07-17 Hilti Ag Tragbares, brennkraftbetriebenes Arbeitsgerät, insbesondere Setzgerät für Befestigungselemente, und Verfahren zu seiner Betriebssteuerung
US6779493B2 (en) * 2002-06-13 2004-08-24 Illinois Tool Works Inc. Combustion mechanism for generating a flame jet
DE10226878A1 (de) 2002-06-17 2003-12-24 Hilti Ag Gasbetriebenes Setzgerät
DE10232035B4 (de) * 2002-07-16 2021-10-14 Hilti Aktiengesellschaft Brennkraftbetriebenes Setzgerät
DE10341384B4 (de) * 2003-09-05 2016-06-23 Hilti Aktiengesellschaft Setzgerät
US6892524B1 (en) * 2003-11-03 2005-05-17 Illinois Tool Works Inc. Latching mechanism for combustion chamber plate of a fastener driving tool
DE102006000179A1 (de) * 2006-04-13 2007-10-18 Hilti Ag Brennkraftbetriebenes Setzgerät
US8397969B2 (en) * 2010-02-12 2013-03-19 Nitroset, Llc Apparatus for installing explosively driven fasteners and fasteners for use therewith

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
None *
See also references of WO2016096953A1 *

Also Published As

Publication number Publication date
JP2017538594A (ja) 2017-12-28
WO2016096953A1 (fr) 2016-06-23
EP3034240A1 (fr) 2016-06-22
US20170334051A1 (en) 2017-11-23

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