EP3233381B1 - Appareil d'enfoncement doté de chambre de combustion réglable - Google Patents

Appareil d'enfoncement doté de chambre de combustion réglable Download PDF

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Publication number
EP3233381B1
EP3233381B1 EP15813799.2A EP15813799A EP3233381B1 EP 3233381 B1 EP3233381 B1 EP 3233381B1 EP 15813799 A EP15813799 A EP 15813799A EP 3233381 B1 EP3233381 B1 EP 3233381B1
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EP
European Patent Office
Prior art keywords
combustion chamber
driving tool
tool according
seal
chamber wall
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.)
Active
Application number
EP15813799.2A
Other languages
German (de)
English (en)
Other versions
EP3233381A1 (fr
Inventor
Peter STAUSS-REINER
Norbert Heeb
Thomas Sperrfechter
Markus Woerner
Tilo Dittrich
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
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Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP3233381A1 publication Critical patent/EP3233381A1/fr
Application granted granted Critical
Publication of EP3233381B1 publication Critical patent/EP3233381B1/fr
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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
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • 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
    • B25C1/008—Safety devices

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 driving tool 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 actuating rod is guided by means of a passage through a housing of the combustion chamber and is connected to the adjustable combustion chamber floor.
  • the combustion chamber bottom is sealed by a circumferential seal against the combustion chamber wall.
  • EP 2 465 643 A2 known. It is the object of the invention to provide a tacker that allows a particularly reliable operation even at low ambient temperatures. This object is achieved according to the invention for a drive-in device mentioned above with the characterizing features of claim 1.
  • the bottom of the combustion chamber which is adjustable with respect to the combustion chamber wall, generally allows the combustion chamber to be collapsed, for example as part of a safety device, if the device is not properly seated on a workpiece. In such devices, the combustion chamber is clamped before each Setzborgang by placing it, so that in each case a KochstMail the combustion chamber wall takes place.
  • the front surface of the gasket protrudes in the direction of the axis beyond a plane of termination of the bottom. This allows a particularly effective discharge of the stripped water past the gap between the bottom and the combustion chamber wall.
  • the discharge of the stripped water is assisted by having a sharp-edged termination in the radially inner end of the front surface.
  • the sharp-edged finish has an edge with an angle between 30 ° and 120 °, more preferably between 70 ° and 110 °. Such an edge forms a barrier to the stripped water, which thereby can hardly penetrate around the edge into the gap between the bottom and the combustion chamber.
  • a recess for discharging water stripped off by the seal is arranged on the combustion chamber bottom and / or in the region of the combustion chamber wall. This also allows the discharge of larger amounts of condensed water on the combustion chamber wall.
  • the seal protrudes on both sides over the final plane of the groove, so that penetration of water into the gap in both axial directions of movement of the bottom is avoided.
  • the seal may in particular be formed symmetrically.
  • the seal comprises a sealing ring open in the circumferential direction.
  • sealing rings made of dimensionally stable material can be inserted into the groove.
  • the sealing ring consists of a hard sealant.
  • a hard sealant is understood a material that is not or not visibly elastically deformed in the sealing state.
  • Such a material may be, for example, a metal such as steel, copper or aluminum or else a hard, in particular fiber-reinforced plastic.
  • soft sealing materials such as rubber or silicone, which are deformed in themselves when used as a seal in order to achieve a sufficient sealing effect.
  • At least two sealing rings arranged one behind the other in the axial direction are provided. Particularly preferably, both sealing rings are inserted in the groove, so that a low overall height is achieved. Open shocks of the sealing rings can be oriented offset in the circumferential direction to each other to ensure a good seal even at high pressures.
  • an elastic support member is arranged under the sealing ring.
  • a support member may in particular be a circumferential ring inserted into the groove from an elastic material, for example an elastomer or a spring plate.
  • the support member may consist of several individual elastic members instead of a circumferential ring.
  • a preferred embodiment of the tacker has a housing with which the combustion chamber wall is rigidly connected.
  • the floor then constitutes a moving part in the tacker.
  • An alternative embodiment of the tacker has a housing to which the floor is rigidly connected.
  • the combustion chamber wall is then in the tacker a moving part.
  • the bottom is so far adjustable relative to the combustion chamber wall that forms an inlet and / or outlet opening of the combustion chamber for air and / or fuel between the bottom and the combustion chamber wall.
  • the bottom and the combustion chamber wall form an inlet and / or outlet valve of the combustion chamber.
  • the tacker off Fig. 1 is a hand-held device, comprising a housing 19 and a combustion chamber 1 with a partially cylindrical combustion chamber wall 2, which is rigidly connected to the housing 19. Adjacent to the combustion chamber 1 is a cylinder 3 with a drive piston 4 guided therein.
  • a safety mechanism of the device comprises annensetzhülse 5, which is placed on a workpiece (not shown) and is pressed against the pressure of a spring. Only in this state, a driving operation can be triggered by igniting a fuel gas in the combustion chamber.
  • a swirl plate 6 is also arranged, which can be moved by the combustion chamber 1 before ignition.
  • a bottom 7 of the combustion chamber 1 is movable along an axis coincident with the driving direction, so that the volume of the combustion chamber is variable.
  • the bottom 7 is sealed for this purpose with a circumferential seal 8 with respect to the cylindrical combustion chamber wall 2.
  • the seal 8 is shown only schematically. An inventive detailed design of the seal 8 is only in Fig. 3 shown in detail.
  • the bottom is rigidly connected to the housing and the combustion chamber wall is formed as an axially movable sleeve.
  • the combustion chamber wall is so far adjustable relative to the ground, so that forms an inlet and / or outlet opening of the combustion chamber for air and / or fuel between the bottom and the combustion chamber wall.
  • the bottom 7 can be moved via an adjusting rod 9 in the direction of the axis, wherein the adjusting rod 9 passes through a passage in a front, second bottom of the combustion chamber.
  • the impressions of the attachment sleeve 5 initially tensions a spring and acts on the adjustment rod 9, which in turn displaces the base 7.
  • sufficient for an ignition volume of the combustion chamber is only opened.
  • condensed water is regularly stripped off. To avoid binding of the mechanism, as little water as possible should penetrate into the region of the seal 8 and freeze.
  • the bottom 7, the combustion chamber 1 and the seal 8 special developments, which are described below.
  • the seal 8 is formed as a set of two sealing rings 10, 11 lying directly one above the other in the axial direction. Both seal rings 10, 11 are received in the same groove 12 on an outer peripheral wall 7 a of the bottom 7.
  • the sealing rings 10, 11 are made of a hard material, in the present case a steel.
  • the sealing rings 10, 11 each have an open shock 13 to be inserted into the groove 12.
  • the impact allows a defined pressing of the sealing rings to the combustion chamber wall.
  • an elastic support member 14 is disposed in the groove below the sealing rings. When using sealing rings 10, 11, the support member 14 is pressed in the radial direction and resiliently acted upon by a force.
  • the joints 13 of the sealing rings 10, 11 are circumferentially offset from each other. In the illustration after Fig. 3 is the shock 13 of the front seal ring 11 in the sectional plane and is therefore visible.
  • the sealing rings 10, 11 in the present case have a respective L-shaped cross section and are arranged mirror-symmetrically to a median plane of the groove.
  • the sealing rings 10, 11 may be formed as the same components.
  • the respective one leg of the L-shaped cross-section engages in the groove 12 a.
  • the respective other leg extends in the axial direction in the gap 15 between the peripheral wall 7a of the bottom 7 and the combustion chamber wall 2.
  • a respective front surface 10a, 11a of the sealing rings 10, 11 protrudes in front of a final plane E1, E2 of the groove in the axial direction 12.
  • the front surface 10a, 11a in the axial direction also projects in front of a respective termination plane A1, A2 of the bottom 2.
  • a respective radially inner end of the front surfaces 10a, 11a has a sharp-edged end 10b, 11b in the form of an edge at an angle of 90 °.
  • the edge lies in each case before the termination plane A1, A2 of the bottom 2.
  • a radius of curvature of the edge is preferably less than 0.5 mm, in particular less than 0.2 mm.
  • a recess 16 is provided on the bottom 7.
  • the recess 16 is formed as an annular space which remains between the bottom 7 and a stop ring 17. With the combustion chamber fully open, the bottom 7 is supported on the stop ring 17. Through openings 18, the stripped water can also flow past the stop ring 17 in other housing areas.

Landscapes

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

Claims (12)

  1. Appareil d'enfoncement comportant :
    un piston d'enfoncement (4) guidé dans un cylindre (3) pour enfoncer un élément de clou dans une pièce, et
    une chambre de combustion (1) agencée au-dessus du piston d'enfoncement (3), qui peut être remplie avec un gaz de combustion,
    dans lequel la chambre de combustion (1) comporte une paroi de chambre de combustion cylindrique (2) et un fond (7) réglable le long d'un axe par rapport à la paroi de chambre de combustion (2),
    dans lequel le fond (7) dispose d'une rainure (12) s'étendant dans une direction circonférentielle avec un joint inséré (8) qui est en appui contre la paroi de chambre de combustion (2) dans une direction radiale,
    caractérisé en ce que
    une surface avant (10a, 11a) dans une direction axiale du joint (8) fait saillie en direction de l'axe devant un plan terminal (E1, E2) de la rainure (12).
  2. Appareil d'enfoncement selon la revendication 1, caractérisé en ce que la surface avant (10a, 11a) du joint (8) fait saillie en direction de l'axe au-dessus d'un plan terminal (A1, A2) du fond (7).
  3. Appareil d'enfoncement selon l'une des revendications précédentes, caractérisé en ce qu'une extrémité radialement intérieure de la surface avant (10a, 11a) comporte une terminaison à angle vif (10b, 11b), en particulier une arête (10b, 11b) avec un angle compris entre 30° et 120°.
  4. Appareil d'enfoncement selon l'une des revendications précédentes, caractérisé en ce qu'un évidement (16) est agencé sur le fond de chambre de combustion (7) et/ou dans la zone de la paroi de chambre de combustion (2) pour évacuer de l'eau retirée par le joint (8).
  5. Appareil d'enfoncement selon l'une des revendications précédentes, caractérisé en ce que le joint (8) fait saillie des deux côtés au-dessus du plan terminal (E1, E2) de la rainure (12).
  6. Appareil d'enfoncement selon l'une des revendications précédentes, caractérisé en ce que le joint (8) comprend un anneau d'étanchéité (10, 11) ouvert dans la direction circonférentielle.
  7. Appareil d'enfoncement selon la revendication 6, caractérisé en ce que l'anneau d'étanchéité (10, 11) est constitué d'une matière étanche dure.
  8. Appareil d'enfoncement selon l'une des revendications 6 ou 7, caractérisé en ce qu'au moins deux anneaux d'étanchéité (10, 11) agencés l'un derrière l'autre dans une direction axiale sont prévus, dans lequel les deux anneaux d'étanchéité (10, 11) sont en particulier insérés dans la rainure (12).
  9. Appareil d'enfoncement selon l'une des revendications 6 à 8, caractérisé en ce qu'un élément de support élastique (14) est agencé sous l'anneau d'étanchéité (10, 11).
  10. Appareil d'enfoncement selon l'une des revendications précédentes, caractérisé en ce que l'appareil d'enfoncement comporte un boîtier (19) et la paroi de chambre de combustion (2) est rigidement reliée au boîtier (19).
  11. Appareil d'enfoncement selon l'une des revendications précédentes, caractérisé en ce que l'appareil d'enfoncement comporte un boîtier et le fond est rigidement relié au boîtier.
  12. Appareil d'enfoncement selon l'une des revendications précédentes, caractérisé en ce que le fond peut être réglé par rapport à la paroi de chambre de combustion jusqu'à un point tel qu'une ouverture d'entrée et/ou de sortie de la chambre de combustion se forme entre le fond et la paroi de chambre de combustion.
EP15813799.2A 2014-12-19 2015-12-16 Appareil d'enfoncement doté de chambre de combustion réglable Active EP3233381B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14199197.6A EP3034239A1 (fr) 2014-12-19 2014-12-19 Appareil d'enfoncement doté de chambre de combustion réglable
PCT/EP2015/079958 WO2016096962A1 (fr) 2014-12-19 2015-12-16 Cloueuse à chambre de combustion réglable

Publications (2)

Publication Number Publication Date
EP3233381A1 EP3233381A1 (fr) 2017-10-25
EP3233381B1 true EP3233381B1 (fr) 2018-10-10

Family

ID=52103089

Family Applications (2)

Application Number Title Priority Date Filing Date
EP14199197.6A Withdrawn EP3034239A1 (fr) 2014-12-19 2014-12-19 Appareil d'enfoncement doté de chambre de combustion réglable
EP15813799.2A Active EP3233381B1 (fr) 2014-12-19 2015-12-16 Appareil d'enfoncement doté de chambre de combustion réglable

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP14199197.6A Withdrawn EP3034239A1 (fr) 2014-12-19 2014-12-19 Appareil d'enfoncement doté de chambre de combustion réglable

Country Status (4)

Country Link
US (1) US10639777B2 (fr)
EP (2) EP3034239A1 (fr)
JP (1) JP6473821B2 (fr)
WO (1) WO2016096962A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2886258A1 (fr) * 2013-12-18 2015-06-24 HILTI Aktiengesellschaft Appareil d'enfoncement
EP2886260A1 (fr) * 2013-12-19 2015-06-24 HILTI Aktiengesellschaft Appareil d'enfoncement
EP2923800A1 (fr) * 2014-03-28 2015-09-30 HILTI Aktiengesellschaft Cloueur à poudre

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2564718Y2 (ja) * 1990-06-22 1998-03-09 日立工機株式会社 打込機のピストンシール装置
DE19962599C2 (de) * 1999-12-23 2002-09-19 Hilti Ag Tragbares, brennkraftbetriebenes Arbeitsgerät, insbesondere Setzgerät für Befestigungselemente, sowie Verfahren zu seiner Betriebssteuerung
DE10226878A1 (de) 2002-06-17 2003-12-24 Hilti Ag Gasbetriebenes Setzgerät
JP2005319549A (ja) * 2004-05-10 2005-11-17 Hitachi Koki Co Ltd 燃焼式釘打機
US20050279802A1 (en) * 2004-06-14 2005-12-22 Moeller Larry M Seal for portable fastener driving tool
DE102004042953B3 (de) * 2004-09-06 2006-02-16 Hilti Ag Brenngasbetriebenes Setzgerät
DE102005006167B4 (de) * 2005-02-10 2017-01-12 Hilti Aktiengesellschaft 10.02.2005Brenngasbetriebenes Setzgerät
JP5556496B2 (ja) * 2010-08-12 2014-07-23 マックス株式会社 ガス燃焼式打込み工具
TWI385057B (zh) * 2010-09-13 2013-02-11 鑽全實業股份有限公司 High pressure nail gun with switch exhaust system
DE102010063177A1 (de) * 2010-12-15 2012-06-21 Hilti Aktiengesellschaft Bolzensetzgerät und Verfahren zum Betreiben eines Bolzensetzgerätes
US9844864B2 (en) * 2012-02-10 2017-12-19 Illinois Tool Works Inc. Sleeve for a pneumatic fastener-driving tool
EP3199301A1 (fr) * 2016-02-01 2017-08-02 HILTI Aktiengesellschaft Chambre de combustion et appareil d'enfoncement

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
JP2017538595A (ja) 2017-12-28
WO2016096962A1 (fr) 2016-06-23
EP3034239A1 (fr) 2016-06-22
JP6473821B2 (ja) 2019-02-20
EP3233381A1 (fr) 2017-10-25
US20170341210A1 (en) 2017-11-30
US10639777B2 (en) 2020-05-05

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