EP0029210A1 - Appareil pneumatique d'enfoncement en particulier pour des moyens de fixation longs - Google Patents

Appareil pneumatique d'enfoncement en particulier pour des moyens de fixation longs Download PDF

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Publication number
EP0029210A1
EP0029210A1 EP80106979A EP80106979A EP0029210A1 EP 0029210 A1 EP0029210 A1 EP 0029210A1 EP 80106979 A EP80106979 A EP 80106979A EP 80106979 A EP80106979 A EP 80106979A EP 0029210 A1 EP0029210 A1 EP 0029210A1
Authority
EP
European Patent Office
Prior art keywords
piston
cylinder
space
working
compressed air
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
Application number
EP80106979A
Other languages
German (de)
English (en)
Other versions
EP0029210B1 (fr
Inventor
Arthur Klaus
Horst Tacke
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.)
Signode Corp
Original Assignee
Signode Corp
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 Signode Corp filed Critical Signode Corp
Publication of EP0029210A1 publication Critical patent/EP0029210A1/fr
Application granted granted Critical
Publication of EP0029210B1 publication Critical patent/EP0029210B1/fr
Expired 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
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure
    • B25C1/041—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air pressure with fixed main cylinder

Definitions

  • the invention relates to a pneumatically actuated driving tool, in particular for long fasteners, with a cylinder in which a working piston is axially displaceably mounted, a driver blade which is guided in a driving channel and is rigidly connected to the working piston, and a manually operated control valve with which the working area of the cylinder can be connected either to the atmosphere or to a compressed air storage room.
  • a wide variety of systems for returning the working piston to the top dead center position are known for pneumatically operated driving tools.
  • all of these systems have two major disadvantages. Namely, these systems require a significant amount of space or volume of the device. Clamping or nailing devices, which are provided for fastening means up to a length of 100 to 120 mm, can still be designed in such a way that an operator can carry and handle them. If, however, drive-in tools for fasteners with a length of 130 mm to about 200 mm were built with the previously known system, these tools could hardly be worn anymore and handled even less in a previously known manner. It also happens that all previously known systems work with their working pistons during the driving-in process against more or less large restoring forces (spring or gas pressure). However, these restoring forces reduce the forces that are required to drive in the fastener and in turn require larger piston diameters and larger control valves. These disadvantages naturally add up with increasing length and cross section of the fastening means.
  • the invention is therefore based on the object of providing a generic driving tool which, with the same size as comparable conventional tools, has an increased driving power.
  • an auxiliary cylinder in which a piston is axially displaceably mounted, and in that a piston rod connected to the piston can be brought into engagement with the assembly consisting of the working piston and driver blade, that an auxiliary valve is provided with which the spaces of the auxiliary cylinder on both sides of the piston are alternately connectable to the atmosphere and the compressed air supply space, that the working cylinder is provided with exhaust openings in the space under the working piston and that the control valve and the auxiliary valve are coupled to one another via a coupling device such that the working space of the cylinder can be connected to the compressed air supply space after that space of the auxiliary cylinder has been connected to the compressed air supply space, the action of which causes the piston to move into the end position in which the piston rod with the assembly consisting of the working piston and driver blade is disengaged, and that the other space of the auxiliary cylinder is connected to the compressed air supply space after the working chamber of the cylinder has been connected to the atmosphere, whereby the piston rod of the piston with the assembly
  • the pneumatic driving tool shown in FIGS. 1 and 2 has a main cylinder 8, in which a working piston 3 is axially displaceable.
  • the working piston 3 is rigidly connected to a driver blade 7, which is guided in an input channel 4.
  • An auxiliary cylinder 1 is arranged parallel to the drive channel 4 such that the overall height of the device is not increased.
  • a piston 11 is slidably mounted in the auxiliary cylinder 1 and is rigidly connected to a piston rod 2.
  • the piston rod 2 can be brought into abutment on the underside of the working piston 3 in order to move it back into its top dead center position after a working stroke.
  • the piston rod 2 moves parallel to the driver blade 7 through the cylinder 8.
  • the auxiliary cylinder 1 is controlled via an auxiliary valve 5 and an exhaust valve 6 such that it runs back into its retracted starting position before the start of the driving-in process, so that the working piston 3 can carry out the driving-in process without counteracting restoring forces.
  • the piston rod 2 consists of a tube in which a contact pin 9, which can be brought into abutment on the underside of the working piston 3, is mounted under the pressure of a spring 10.
  • the outlet valve 6 is arranged in the bottom of the auxiliary cylinder 1 and, when the driving tool is placed on a workpiece, releases a relatively large opening cross section in addition to the auxiliary valve 5. Before the driving-in process begins, the piston 11 of the auxiliary cylinder 1 is therefore moved into the bottom dead center position under the pressure of the compressed air connected on the head side via a line 12 to the compressed air storage space 13.
  • the auxiliary valve 5 is controlled via a cam 14 of the workpiece contact slide 15 in such a way that the space of the auxiliary cylinder 1 located under the piston 11 is vented when the driving tool is placed on a workpiece.
  • a finger trigger valve 17 assigned to the main control valve 19 is activated via a bracket 16.
  • the main control valve 19 is opened and the compressed air located in the storage space 13 of the driving tool can flow into the working space 26 of the cylinder 8 above the working piston 3.
  • the auxiliary valve 5 is reversed via the cam 14 of the contact slide 15, and the outlet valve 6 is closed, so that pressure air can pass through lines 20 from the air storage space 13 into the space of the auxiliary cylinder 1 located under the piston 11.
  • the piston 11 is displaced into the upper position due to its larger cross-section on the bottom, as a result of which the working piston 3 is also displaced upward, since the inevitable reversal of the main control valve 19 enabled the compressed air located above the working piston 3 to escape through holes 21.
  • a vacuum holding device 22 is provided, into which an upper shoulder 24 of the working piston 3 provided with a sealing element 23 is inserted in the upper dead center position of the working piston.
  • This vacuum holding device 22 is provided with a check valve 25; so that when the extension 24 of the working piston 3 is retracted, the air in the working space 26 can get into the chamber 28 located above the working piston 3. Since this chamber 28 is connected to the atmosphere when the main control valve 19 is open, the air can escape to the outside.
  • the working piston 3 is pulled out of the vacuum chamber with its attachment 24 as a result of the compressed air acting on its outer surface. Since the check valve 25 remains closed, a vacuum is formed in the vacuum chamber.
  • This negative pressure holds the working piston 3 until a sufficiently large air pressure is stored in the working space above the outer surface of the working piston 3, whereupon the extension 24 of the working piston 3 is completely torn out of the vacuum chamber 22. A high initial acceleration of the working piston 3 is thereby achieved.
  • the working piston 3 can therefore perform the working stroke without having to work against large restoring forces, because the atmospheric air located under the working piston 3 can escape through the exhaust air openings 27 unhindered. Apart from its friction on the wall of the cylinder 8 and the frictional resistance of the fastening means, the working piston 3 is therefore not subject to any greater forces than during free flight.
  • the auxiliary cylinder 1 which fulfills the same task as in the first embodiment described above, is arranged in the housing body.
  • the return of the working piston 3 to the top dead center position is also effected via the piston rod 2 of the auxiliary cylinder 1.
  • the piston rod 2 is articulated on a lever 30, the front end 31 facing away from the pivot point of the lever 30 engages under a lateral protruding nose 32 of the driver blade 7.
  • the auxiliary cylinder 1 is controlled as in the first embodiment in such a way that the reset lever 30 is pivoted out of the area of the protruding nose 32 fastened to the driver blade 7 in such a way that it does not touch it when the working piston 3 has reached the bottom dead center position before the driving-in process begins .

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
EP80106979A 1979-11-16 1980-11-12 Appareil pneumatique d'enfoncement en particulier pour des moyens de fixation longs Expired EP0029210B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2946387A DE2946387C2 (de) 1979-11-16 1979-11-16 Pneumatisches betätigbares Eintreibwerkzeug
DE2946387 1979-11-16

Publications (2)

Publication Number Publication Date
EP0029210A1 true EP0029210A1 (fr) 1981-05-27
EP0029210B1 EP0029210B1 (fr) 1984-02-01

Family

ID=6086199

Family Applications (1)

Application Number Title Priority Date Filing Date
EP80106979A Expired EP0029210B1 (fr) 1979-11-16 1980-11-12 Appareil pneumatique d'enfoncement en particulier pour des moyens de fixation longs

Country Status (4)

Country Link
US (1) US4380313A (fr)
EP (1) EP0029210B1 (fr)
JP (1) JPS56126589A (fr)
DE (1) DE2946387C2 (fr)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5110030A (en) * 1990-08-10 1992-05-05 Hitachi Koki Co., Ltd. Pneumatic fastener driving tool having an air exhaust arrangement
JP2923936B2 (ja) * 1994-11-07 1999-07-26 マックス株式会社 空気圧駆動式釘打機の減音装置
US6041603A (en) * 1997-12-31 2000-03-28 Porter-Cable Corporation Internal combustion fastener driving tool accelerator plate
US6158643A (en) * 1997-12-31 2000-12-12 Porter-Cable Corporation Internal combustion fastener driving tool piston and piston ring
USD410182S (en) 1997-12-31 1999-05-25 Porter-Cable Corporation Internal combustion fastener driving tool
US6006704A (en) * 1997-12-31 1999-12-28 Porter-Cable Corporation Internal combustion fastener driving tool fuel metering system
US6045024A (en) * 1997-12-31 2000-04-04 Porter-Cable Corporation Internal combustion fastener driving tool intake reed valve
US6260519B1 (en) * 1997-12-31 2001-07-17 Porter-Cable Corporation Internal combustion fastener driving tool accelerator plate
US6016946A (en) * 1997-12-31 2000-01-25 Porter-Cable Corporation Internal combustion fastener driving tool shuttle valve
US6164510A (en) * 1998-06-03 2000-12-26 Illinois Tool Works Inc. Nosepiece shield for combustion powered tool
CA2306618C (fr) * 1999-05-18 2005-06-28 Illinois Tool Works Inc. Ecran a embout pour outil a combustion
DE20110754U1 (de) * 2001-06-28 2001-10-18 Prebena Wilfried Bornemann Netzunabhängiges Eintreibgerät für Befestigungsmittel
US6481612B1 (en) * 2002-04-02 2002-11-19 Peter G. Mangone, Jr. Fastening device delivery tool with perpendicular ram driven by a repeatable arcuate force member
CN103707266B (zh) * 2014-01-10 2015-07-22 浙江荣鹏气动工具有限公司 气动钉枪
US11819989B2 (en) 2020-07-07 2023-11-21 Techtronic Cordless Gp Powered fastener driver
CA3167425A1 (fr) 2021-07-16 2023-01-16 Techtronic Cordless Gp Pose-attaches electrique

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1170338B (de) * 1956-05-03 1964-05-14 Richard Laucher Pistolenfoermiges Werkzeug zum Eintreiben von Naegeln od. dgl.

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT203960B (de) * 1955-03-24 1959-06-25 Hans Zoeller Druckluftkippvorrichtung für Mülltonnen
US2914033A (en) * 1956-07-23 1959-11-24 Powers Wire Products Company I Air operated tool and valve therefor
US2944522A (en) * 1957-02-25 1960-07-12 Fastener Corp Fastener driving apparatus
US3498517A (en) * 1967-04-21 1970-03-03 Fastener Corp Fastener driving tool
US3563438A (en) * 1968-12-05 1971-02-16 Fastener Corp Fastener driving tool
US3599854A (en) * 1969-01-13 1971-08-17 Samuel Montague Rose Pressure-fluid-operated tool
US4122904A (en) * 1977-01-27 1978-10-31 Pneutek, Inc. Pneumatic hammer driver
FR2411568A1 (fr) * 1977-12-16 1979-07-13 Schlumberger Cie N Pistolet d'abattage a air comprime

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1170338B (de) * 1956-05-03 1964-05-14 Richard Laucher Pistolenfoermiges Werkzeug zum Eintreiben von Naegeln od. dgl.

Also Published As

Publication number Publication date
DE2946387C2 (de) 1986-04-10
US4380313A (en) 1983-04-19
DE2946387A1 (de) 1981-05-27
JPS56126589A (en) 1981-10-03
EP0029210B1 (fr) 1984-02-01

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