EP3349945A1 - Fuel gas-operated drive-in device having valve component - Google Patents
Fuel gas-operated drive-in device having valve componentInfo
- Publication number
- EP3349945A1 EP3349945A1 EP16760517.9A EP16760517A EP3349945A1 EP 3349945 A1 EP3349945 A1 EP 3349945A1 EP 16760517 A EP16760517 A EP 16760517A EP 3349945 A1 EP3349945 A1 EP 3349945A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- combustion chamber
- tacker
- valve member
- gas mixture
- valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000000446 fuel Substances 0.000 title description 2
- 238000002485 combustion reaction Methods 0.000 claims abstract description 52
- 239000000203 mixture Substances 0.000 claims abstract description 23
- 238000007789 sealing Methods 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 3
- 239000002737 fuel gas Substances 0.000 description 21
- 239000007789 gas Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000001960 triggered effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 239000000523 sample Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000005693 optoelectronics Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 230000002747 voluntary effect Effects 0.000 description 1
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.
- WO 2009/140728 A1 describes a fuel-operated 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 fuel gas can be charged by combined action by means of a fan and the stroke of the drive piston to an overpressure to increase the fuel gas
- No. 8,091,751 B2 describes a fuel gas driven tacking device in which the fuel gas can be charged to an overpressure by means of an electric compressor.
- a combustion chamber of the device comprises a plurality of mutually movable combustion chamber parts and is closed by means of a Anyakgestfites when the tacker against a
- valve member opens automatically when the tacker is dropped from the workpiece.
- the failure of the ignition of the mixture can have any cause, for example, a voluntary cancellation of the setting process by the operator or even a malfunction.
- an increased by means of the Aufladegliedes pressure to increase the driving energy is understood.
- the pressure of the fuel gas mixture is usually slightly above an ambient pressure, since the pressurized fuel gas is added to the air under atmospheric pressure in the combustion chamber. This is only a slight increase in pressure.
- An overpressure according to the invention is preferably at least 100 mbar, more preferably at least 200 mbar above atmospheric pressure.
- a Aufladeglied can be within the meaning of the invention, any means that raises at least the air content of the fuel gas mixture targeted above the atmospheric pressure. In particular, it may be an electric compressor.
- valve member blocks or opens a controllable connection between the combustion chamber and an outer space.
- the valve member is not understood to mean a movable combustion chamber part, by means of which displacement the combustion chamber is first formed.
- the sensing element may be a movable linkage, an electrical switch, an optical sensor, or otherwise.
- the feeler member is in communication with the valve member such that the valve member is driven in response to a position of the feeler member. In the case of a non-ignition of the gas mixture settling of the tacker can be determined via the sensing element, and the pressurized fuel gas mixture can escape via the valve member.
- the combustion chamber comprises at least two mutually movable combustion chamber parts, wherein the combustion chamber parts are combined only in a pressed state of the tacker to the closed combustion chamber.
- Devices of this type are generally known and, by design, have a high degree of safety against unwanted or abusive tripping.
- Such conventional devices with overpressure that automatic opening or even a collapse of the combustion chamber when discontinuing the device may be disturbed if no ignition was done.
- This is fundamentally because such a combustion chamber has large sealing surfaces and sealing systems on which act correspondingly high forces due to the pressure. Solutions in which a greater spring force of a return spring is provided according to the overpressure, are uncomfortable because of the required greater contact pressure by the operator.
- the additional valve member according to the invention allows a largely conventional construction of the combustion chamber, since the overpressure is initially deliberately reduced, after which an opening or a collapse of the combustion chamber takes place at low spring forces.
- the combustion chamber parts are closed gas-tight in the closed state via a self-reinforcing sealing system.
- the pressing forces of the seals increase with the pressure present in the combustion chamber, so that a maximum overpressure can in principle be chosen arbitrarily and independently of the force of a pressure spring or the like.
- valve member is designed to be low-force with respect to the overpressure. This is preferably achieved in a simple manner in that a valve stamper of the valve member has a direction of movement which runs transversely to a direction of action of the overpressure of the gas mixture. Under a poor arm Training is presently understood to mean any valve arrangement in which a standard operating pressure changes a required actuating force of the valve member at most insignificantly.
- valve member is mechanically directly connected to the feeler member, so that a movement of the feeler member causes an adjustment of the valve.
- the valve member may be adjustable via an electric actuator.
- the actuator is connected to an electronic control unit of the tacker.
- the sensing element may be formed, for example, as an electrical switch or sensor, whereby a total of construction weight is saved.
- such a solution allows a universal control of the valve member as a security agent.
- the charging member comprises an electric compressor.
- the charging member may also be a hand-operated compressor, a reservoir compressed air reservoir or the like.
- the charging member is integrated in the setting device.
- the charging member may be separate from the rest of the setting tool.
- the gas mixture escaping via the valve member drives a generator in order to partially convert mechanical pressure energy into electrical energy.
- the mechanical energy of the charged gas is thus not completely lost in a discontinuation of the setting process, but can be partly returned to a battery of the device.
- the generator is formed by changing the operating mode of the Aufladegliedes. As a result, additional components can be saved.
- FIG. 1 shows a schematic sectional view of a tacker according to the invention of a first embodiment with a mechanically actuated valve member in a first operating state.
- Fig. 2 shows the tacker of Fig. 1 in a second operating condition.
- FIG 3 shows a schematic sectional view of a tacker according to the invention of a second exemplary embodiment with an electrically actuated valve member.
- the tacker of Fig. 1 is a hand-held device comprising a housing 1 and a combustion chamber 2 received therein with a combustion chamber wall. Adjacent to the combustion chamber 2 is a cylinder 3 with a guided therein driving piston 4.
- a safety mechanism of the device comprises a Anhuigestfite with a Aufsetzhülse 5, which is placed on a workpiece (not shown) and against the pressure of a spring (not shown) is pressed. Only in this state, a driving operation can be triggered by igniting a fuel gas in the combustion chamber 2.
- the combustion chamber 2 consists of several mutually movable combustion chamber parts (not shown), which are combined only after pressing the attachment sleeve 5 via the Anyakgestfite to a closed space for receiving an ignitable fuel gas mixture.
- Such types of combustion chambers with the aim of improving safety are generally known, for example from the publications mentioned above. In the present schematic drawings, therefore, the detailed description of this safety mechanism has been omitted.
- An ignitable fuel gas mixture is introduced in the present case by means of a Aufladeglieds 6 and a fuel gas storage 7 in the combustion chamber 2.
- the charging member 6 is designed as supplied by a battery 8, electric compressor 9.
- the fuel gas is introduced via a metering valve 10 from the fuel gas storage in the compressed air downstream of the compressor 9, after which the flow of the fuel gas mixture via a feed line enters the combustion chamber 2.
- the combustion chamber parts are sealed in the attached state of the device by means of a sealing system so that a pressure increase in the
- Combustion chamber 2 leads to an increase of the forces acting on the seals forces
- a valve member 15 is provided according to the invention, that the combustion chamber 2 connects to the outside space.
- the valve member 15 has a valve spool 16 which moves transversely to a pressure direction or outflow direction of the fuel gas mixture. As a result, a resistance of the valve spool is hardly dependent on the magnitude of the overpressure in the combustion chamber 2.
- the valve slide 16 is connected via a mechanical linkage 17 with a feeler member 18.
- the feeler member 18 is located in the region of the attachment sleeve 5 and is shown in the schematic drawing as a depressable probe tip.
- the linkage 17 is subjected to a force by means of a spring 19, so that the feeler member 18 is displaced forward in the non-attached state of the tacking device and the valve member 15 is in an open state (see FIG. 2).
- valve spool 16 When the tacker is mounted on the workpiece, the feeler member 18 is inserted against the spring pressure. The valve spool 16 is displaced via the rod 17 and the valve member 15 is closed.
- the valve function is shown in the drawings by overlapping or offset openings in the valve spool 16 and in the
- Combustor wall shown.
- the combustor 2 is pressurized with the fuel gas mixture.
- Attachment sleeve 5 and probe member 18 are inserted.
- the attachment sleeve 5 initially remains in its position, since the combustion chamber parts can not move.
- the feeler member 18 advances due to the spring force of the spring 19, so that the valve member 15 is opened via the rod 17. That way that can
- the combustion chamber parts can be moved by acting spring forces, so that the attachment sleeve is also moved back into the front position (not shown).
- valve member according to the invention is also an advantageous development and a security gain, if the sealing system of the combustion chamber is not designed to be self-reinforcing or if the resetting
- Fig. 3 shows a second embodiment of the invention, in which, in contrast to the first embodiment, an electrical actuation of the valve member 15 takes place.
- valve member 15 has an electric actuator 20 which is connected to an electronic control unit 21.
- the feeler is designed as an electrical pushbutton 22 at the end of the attachment sleeve 5.
- the key switch 22 is also connected to the control unit 21.
- the tacker has a manually operable switch 23, which is easily accessible on the housing 1 of the tacker.
- a manually operable switch 23 is easily accessible on the housing 1 of the tacker.
- Such a designed valve member may be designed, for example, as normally open to ensure maximum safety. An opening of the closed
- Valve member of the present example takes place in operation when the feeler member 22 is not seated on a workpiece. However, an opening also takes place when the manually operated switch 23 is pressed. As a result, the operator can unload the combustion chamber at any time or make sure about the discharged state of the device.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Portable Nailing Machines And Staplers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP15185079.9A EP3141348A1 (en) | 2015-09-14 | 2015-09-14 | Driving device powered by combustion gas with valve member |
PCT/EP2016/070938 WO2017045971A1 (en) | 2015-09-14 | 2016-09-06 | Fuel gas-operated drive-in device having valve component |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3349945A1 true EP3349945A1 (en) | 2018-07-25 |
EP3349945B1 EP3349945B1 (en) | 2020-03-04 |
Family
ID=54145646
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15185079.9A Withdrawn EP3141348A1 (en) | 2015-09-14 | 2015-09-14 | Driving device powered by combustion gas with valve member |
EP16760517.9A Active EP3349945B1 (en) | 2015-09-14 | 2016-09-06 | Driving device powered by combustion gas with valve member |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP15185079.9A Withdrawn EP3141348A1 (en) | 2015-09-14 | 2015-09-14 | Driving device powered by combustion gas with valve member |
Country Status (4)
Country | Link |
---|---|
US (1) | US10759032B2 (en) |
EP (2) | EP3141348A1 (en) |
CN (1) | CN108025426B (en) |
WO (1) | WO2017045971A1 (en) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3141347A1 (en) * | 2015-09-14 | 2017-03-15 | HILTI Aktiengesellschaft | Driving device powered by combustion gas with valve member |
TWI751176B (en) * | 2016-08-31 | 2022-01-01 | 日商工機控股股份有限公司 | Nailer, pressure regulator and nailing unit |
EP3677384B1 (en) * | 2018-01-19 | 2021-05-05 | Max Co., Ltd. | Driving tool |
US11279014B2 (en) | 2018-01-19 | 2022-03-22 | Max Co., Ltd. | Gas combustion type driving tool |
US11624314B2 (en) * | 2018-08-21 | 2023-04-11 | Power Tech Staple and Nail, Inc. | Combustion chamber valve and fuel system for driven fastener hand tool |
US11819989B2 (en) | 2020-07-07 | 2023-11-21 | Techtronic Cordless Gp | Powered fastener driver |
CA3167425A1 (en) | 2021-07-16 | 2023-01-16 | Techtronic Cordless Gp | Powered fastener driver |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3904504A1 (en) | 1988-09-21 | 1990-03-22 | Karl Dipl Ing Petersen | Triggering safety device for compressed-air nailers |
US5752643A (en) * | 1995-05-23 | 1998-05-19 | Applied Tool Development Corporation | Internal combustion powered tool |
DE10013270A1 (en) * | 2000-03-17 | 2001-09-20 | Krupp Berco Bautechnik Gmbh | Fluid-driven hammer mechanism has striking piston made immobile if its movement exceeds certain setting |
DE10260702B4 (en) * | 2002-12-23 | 2014-01-30 | Hilti Aktiengesellschaft | Internal combustion setting device |
DE10260704A1 (en) * | 2002-12-23 | 2004-07-01 | Hilti Ag | Combustion-powered setting tool |
DE10318554B4 (en) * | 2003-04-24 | 2005-03-24 | Hilti Ag | Internal combustion setting device |
DE102004043955B4 (en) | 2004-09-11 | 2006-07-20 | Hilti Ag | Internal combustion setting device |
JP4622437B2 (en) | 2004-10-08 | 2011-02-02 | マックス株式会社 | Driving depth adjusting device for combustion gas driven nailer |
DE102005000107B4 (en) * | 2005-08-25 | 2014-03-13 | Hilti Aktiengesellschaft | Pneumatically operated setting tool |
WO2007048006A2 (en) * | 2005-10-21 | 2007-04-26 | Black & Decker Inc. | Combustion-powered driving tool |
JP2008255813A (en) | 2007-04-02 | 2008-10-23 | Max Co Ltd | Gas internal combustion type nail driver |
JP5067045B2 (en) | 2007-07-04 | 2012-11-07 | マックス株式会社 | Gas fired driving tool |
DE102008000909A1 (en) * | 2008-04-01 | 2009-10-08 | Hilti Aktiengesellschaft | Internal combustion setting device |
WO2009140728A1 (en) | 2008-05-21 | 2009-11-26 | Poly Systems Pty Ltd | Tool for driving fasteners |
US8336749B2 (en) | 2009-03-31 | 2012-12-25 | Illinois Tool Works Inc. | Single switched dual firing condition combustion nailer |
FR2965741B1 (en) * | 2010-10-08 | 2013-05-31 | Prospection & Inventions | PRE-PRESSURE FASTENING APPARATUS AND FIXING METHOD THEREFOR |
EP2826601A1 (en) * | 2013-07-16 | 2015-01-21 | HILTI Aktiengesellschaft | Control method and hand tool machine |
-
2015
- 2015-09-14 EP EP15185079.9A patent/EP3141348A1/en not_active Withdrawn
-
2016
- 2016-09-06 US US15/752,999 patent/US10759032B2/en active Active
- 2016-09-06 CN CN201680051643.6A patent/CN108025426B/en active Active
- 2016-09-06 WO PCT/EP2016/070938 patent/WO2017045971A1/en active Application Filing
- 2016-09-06 EP EP16760517.9A patent/EP3349945B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP3141348A1 (en) | 2017-03-15 |
CN108025426B (en) | 2021-05-04 |
US20190001474A1 (en) | 2019-01-03 |
EP3349945B1 (en) | 2020-03-04 |
CN108025426A (en) | 2018-05-11 |
US10759032B2 (en) | 2020-09-01 |
WO2017045971A1 (en) | 2017-03-23 |
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