EP1894679B1 - Outil d'entraînement d'attaches pour applications d'ajustage - Google Patents

Outil d'entraînement d'attaches pour applications d'ajustage Download PDF

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Publication number
EP1894679B1
EP1894679B1 EP07023545A EP07023545A EP1894679B1 EP 1894679 B1 EP1894679 B1 EP 1894679B1 EP 07023545 A EP07023545 A EP 07023545A EP 07023545 A EP07023545 A EP 07023545A EP 1894679 B1 EP1894679 B1 EP 1894679B1
Authority
EP
European Patent Office
Prior art keywords
fastener
tool
engagement end
lockout
follower
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.)
Expired - Lifetime
Application number
EP07023545A
Other languages
German (de)
English (en)
Other versions
EP1894679A3 (fr
EP1894679A2 (fr
Inventor
Murray Weinger
Robert S. Buetow
Patrick J. Driscoll
William E. Richardson
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.)
Illinois Tool Works Inc
Original Assignee
Illinois Tool Works Inc
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 Illinois Tool Works Inc filed Critical Illinois Tool Works Inc
Priority claimed from EP99400874A external-priority patent/EP0951965B1/fr
Publication of EP1894679A2 publication Critical patent/EP1894679A2/fr
Publication of EP1894679A3 publication Critical patent/EP1894679A3/fr
Application granted granted Critical
Publication of EP1894679B1 publication Critical patent/EP1894679B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B25C1/008—Safety devices
    • 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 present invention relates generally to improvements in fastener driving tools, and specifically to a powered tool according to the preamble of claim 1.
  • a powered tool is known from US 3 606 128 .
  • the tool includes a number of improved features especially suitable to provide enhanced operation and user comfort when using the tool in trim applications, while also improving ease of tool assembly.
  • the tool is a combustion powered tool, but aspects of the present invention are similarly applicable to other tools, such as pneumatically powered and powder actuated tools.
  • Such tools incorporate a generally gun-shaped tool housing enclosing a small internal combustion engine.
  • the engine is powered by a canister of pressurized fuel gas, also called a fuel cell.
  • a battery-powered electronic power distribution unit produces the spark for ignition, and a fan located in the combustion chamber provides for both an efficient combustion within the chamber, and facilitates scavenging, including the exhaust of combustion by-products.
  • the engine includes a reciplocating piston having an elongate, rigid driver blade disposed within a piston chamber of a cylinder body.
  • the wall of a combustion chamber is axially reciprocable about a valve sleeve and, through a linkage, moves to close the combustion chamber when a workpiece contact element at the end of a nosepiece connected to the linkage is pressed against a workpiece.
  • This pressing action also triggers a fuel metering valve to introduce a specified volume of fuel gas into the closed combustion chamber from the fuel cell.
  • the metering valve may take the form of a solenoid valve, which is powered by the battery, or may be a purely mechanical valve.
  • the piston and driver blade Upon the pulling of a trigger, which causes the ignition of a charge of gas in the combustion chamber of the engine, the piston and driver blade are shot downward to impact a positioned fastener and drive it into the workpiece.
  • a displacement volume enclosed in the piston chamber below the piston is forced to exit through one or more exit ports provided at a lower end of the cylinder.
  • the piston After impact, the piston then returns to its original, or "ready” position through differential gas pressures within the cylinder.
  • Fasteners are fed into the nosepiece from a supply assembly, such as a magazine, where they are held in a properly positioned orientation for receiving the impact of the driver blade. Power of the tools differs according to the length of the piston stroke, volume of the combustion chamber, fuel dosage and similar factors.
  • combustion powered tools have been successfully applied to large workpieces requiring large fasteners, for framing, roofing and other heavy duty applications.
  • Smaller workpiece and smaller fastener trim applications demand a different set of operational characteristics than the heavy-duty, "rough-in", and other similar applications.
  • One operational characteristic required in trim applications is the ability to predictably control fastener driving depth.
  • some trim applications require fasteners to be countersunk below the surface of the workpiece, others require the fasteners to be sunk flush with the surface of the workpiece, and some may require the fastener to stand off above the surface of the workpiece.
  • Depth adjustment has been achieved in pneumatically powered and combustion powered tools through a tool controlling mechanism, referred to as a drive probe, that is movable in relation to the nosepiece of the tool. Its range of movement defines a range for fastener depth-of-drive.
  • Exemplary depth adjustment tool-controlling mechanisms are disclosed in U.S. Patent No. 3,519,186 , U.S. Patent No. 4,767,043 , U.S. Patent No. 5,219,110 , and U.S. Patent No. 5,385,286 .
  • the spool has ribs that engage a spool restraining element when the tool controlling mechanism is pressed inwardly toward the tool body. This prevents spool movement when the tool is enabled for firing.
  • the operator typically obtains a desired depth through trial and error. If depth is altered for some reason, it may take additional trial and error to return to a previously used depth. This experimentation to obtain a desired depth slows operation of the tool, and may result in workpiece damage in trim applications which require a precisely controlled depth.
  • the fasteners used in trim applications may also be difficult to manipulate and load due to their small size.
  • Rear loading, top loading, and side loading arrangements are known in the art.
  • the side and top loading arrangements are more mechanically complex since the direction in which the fasteners are loaded into the magazine is not in the same direction into the nosepiece that the fasteners travel during operation.
  • the known rear loading arrangement is more easily implemented, but is more difficult to use because no portion of the gun provides a guiding surface for a user to align a fastener, or the beginning of a group of fasteners, with the opening for placing fasteners into the magazine.
  • Trim applications also require more exacting positioning during firing. Typical tools obscure an operator's sight line since the body of the tool interferes with the view to a portion of the workpiece proximate to the point at which the fastener will be driven into the workpiece.
  • Tools having self contained power sources generally must also be portable, and cost is an important concern. To keep cost and weight down, many portable tools lack an on/off switch. To prevent unintentional operation of the tool, some operators disengage the battery held in the handle or some other portion of the tool. In the combustion tools, the battery is necessary to produce the spark and fan movement necessary to tool operation. If the operator is moving, for instance by climbing a ladder or scaffold, the loosely held disconnected battery (or batteries) may fall out. This is an inconvenience to the operator, a cause of damage to the battery, and a potential hazard to the operator and anyone below the operator.
  • Another object of the present invention is to provide an improved fastener driving tool for trim applications which prevents tool operation when a predetermined number of small fasteners remain in the magazine.
  • a related object of the invention is to provide an improved tool with a distance amplifying lockout which multiplies the mechanical movement associated with the movement of the fasteners in the magazine after driving of a fastener to block the drive probe and linkage from moving into an operational position.
  • the above-listed objects are met or exceeded by the present powered tool according to claim 1, which is especially suited to trim applications.
  • the tool of the present invention includes features aiding in the operation, ergonomics, and assembly of the tool.
  • the tool includes a distance amplifying lockout.
  • the lockout is pivotally mounted and is engaged by a rod that is part of a fastener follower when a predetermined number of fasteners remain.
  • An engagement end is located further from the pivot point than a rod contact point to provide a significant amplification in movement. The amplification is sufficient to move the engagement end into a position to prevent the tool's drive probe and linkage from being placed into an operational position after a single fastener has been expended.
  • the present embodiment concerns an improved fastener driving tool that is especially suited for installation of trim, and other decorative and finishing applications utilizing small fasteners and small workpieces, which will be collectively referred to herein as "trim applications”.
  • the tool is maneuverable and comfortable, it provides repeatable depth control, and includes a number of features which render use and assembly more efficient and reliable.
  • a housing 12 of the tool 10 encloses a self contained internal power source 16 within a housing main chamber 17.
  • the power source 16 includes a combustion chamber that communicates with a cylinder.
  • a piston within the cylinder is connected to the upper end of a driver blade 18.
  • an operator induces combustion of a measured amount of propellant within the combustion chamber, causing the driver blade 18 to be forcefully driven downward into a nosepiece 22.
  • the nosepiece guides the driver blade 18 to strike a fastener that had been delivered into the nosepiece via a fastener magazine 24.
  • general operation is like that of conventional combustion fastener driving tools.
  • a distance amplifying lockout 52 that amplifies the movement of the fastener follower 46 after a rod 54 contacts its contact point 56, which is located between its pivot mounting 58 and its engagement end 60.
  • the rod 54 is preferably flexible to aid in assembly when housing halves 12a and 12b are brought together (see FIG. 8).
  • the rod 54 must be flexible enough to bend over the distance amplifying lockout. It will either bend into place at the contact point when the housing halves are brought together or after the fastener follower 46 is pulled back for the first time.
  • the contact point 56 is located near the axis of rotation defined by the pivot mounting 58 so that further movement of the rod 54 after contacting the point 56 produces an amplified movement of the engagement end 60.
  • a .060" movement at the contact point 56 created by the discharge of a single trim fastener is translated into a 200" movement of the engagement end 60.
  • the pushing of the rod 54 at the contact point 56 overcomes a light spring force supplied by a light spring 62 to move the engagement end 60 into a position which will block a terminal end 64 of the probe 28 from moving upward.
  • the engagement end 60 is preferably shaped to accommodate the terminal end 64 of the probe, and an opposite surface 66 mates with a solid (preferably steel) portion 68 of the tool 10.
  • the rod 54 must be resilient enough to bend out of the way of lockout 52 when halves of the housing are rotated together. Other factors are also important with respect to the magazine 24, follower 46 and lockout 52.
  • the follower 46 should contact a portion of the housing before the lockout 52 is pushed to a breaking point. This protective position is illustrated in FIGs. 2 and 5 . This protects the lockout 52 from accidental breakage when an operator accidentally allows the follower 46 to slam back toward the lockout 52.
  • the follower 46 should keep light pressure on remaining fasteners.
  • the housing 12 should not be contacted by the follower 46 at that point, which is when 10 fasteners remain in a preferred embodiment. In other words, after the 11 th remaining fastener, for example, is shot, the rod 54 activates the lockout 52 while keeping pressure on the 10th brad to keep the remaining brads in position.
  • fastener follower 46 may pull back the fastener follower 46 to move it back along the magazine 24 so that more fasteners may be loaded into the magazine 24.
  • It is a bypass type follower, so a bar 70 and associated spring 71 pivotally control a fastener engager 72 so it will travel over fasteners in the magazine 24 on the way back, or travel over fasteners on the way forward when an operator presses the bar 70.
  • the engager 72 will engage the rearmost fastener upon meeting it.
  • a constant force negator spring (not shown) is rolled into a molded pocket within the housing 12, and exerts force to pull the fastener follower 46 toward the nosepiece 22 and engage the engager 72 with the rearmost fastener within the magazine 24. After lockout, the operator overcomes this force to pull the fastener follower 46 back, and the distance amplifying lockout 52 is moved to a resting position through force supplied by the light spring 62. The resting position is defined by a stop end 74 of the lockout 52, which abuts a solid portion 76 of the tool 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Adornments (AREA)

Claims (4)

  1. Outil électrique construit pour entraîner une lame d'enfoncement (18) en réponse à une alimentation provenant d'une source d'alimentation en puissance (16), de manière à venir frapper un élément d'attache et à l'enfoncer dans une pièce, comprenant :
    un boîtier (12) ayant une chambre principale (17) renfermant ladite source d'alimentation en puissance ;
    un nez (22) associé audit boîtier pour recevoir un élément d'attache et guider ladite lame d'enfoncement en direction de son impact avec ledit élément d'attache ;
    une poignée (82) ;
    une gâchette (20) permettant à un opérateur d'actionner la source d'alimentation en puissance ;
    un ensemble d'alimentation en éléments d'attache (24) associé audit boîtier pour alimenter des éléments d'attache dans ledit nez ;
    une tringle d'activation d'outil (44) sollicitée dans la direction d'une position non fonctionnelle, et déplaçable dans une position fonctionnelle lorsque ledit outil est pressé contre une pièce ;
    un suiveur d'élément d'attache (46) dans ledit moyen d'alimentation en éléments d'attache (24) ; et
    un verrouillage d'amplification de distance (52) pour amplifier le mouvement dudit suiveur d'élément d'attache (46) lorsque ledit suiveur d'élément d'attache est amené en contact avec ledit verrouillage d'amplification de distance en réponse à l'éjection d'un élément d'attache individuel hors dudit outil, ledit verrouillage (52) empêchant ladite tringle d'activation d'outil (44) d'être déplacée dans ladite position fonctionnelle, ledit verrouillage (52) comprenant un bras allongé (58) ayant une extrémité d'engagement (60), ledit bras allongé étant monté de manière pivotante sur ledit outil au niveau d'une position de pivotement adjacente à un axe de mouvement défini par une sonde de contact de pièce (28) connectée à ladite tringle (44),
    caractérisé en ce que
    ladite extrémité d'engagement (60) est poussée à l'écart dudit axe de mouvement, et ledit suiveur d'élément d'attache (46) s'engage avec ledit bras allongé entre ladite position de pivotement et ladite extrémité d'engagement pour déplacer ladite extrémité d'engagement (60) sur une plus grande distance que la distance sur laquelle ledit suiveur d'élément d'attache (46) déplace le bras allongé en un point où ledit suiveur d'élément d'attache s'engage avec ledit bras allongé (58) de sorte que l'extrémité d'engagement soit déplacée dans ledit axe de mouvement pour bloquer ladite sonde (28).
  2. Outil selon la revendication 1, dans lequel ledit bras allongé (58) comprend en outre une extrémité de butée (74) en face de ladite extrémité d'engagement et ladite extrémité de butée (74) vient buter contre une portion solide (76) dudit outil (10) lorsque ladite extrémité d'engagement (60) est poussée à l'écart dudit axe de mouvement pour définir une position de repos du bras allongé.
  3. Outil selon la revendication 1, dans lequel ladite extrémité d'engagement (60) comporte une surface courbe pour accepter une extrémité terminale supérieure de ladite sonde (28).
  4. Outil selon la revendication 2, dans lequel ladite extrémité d'engagement (60) comporte une surface plane en face de ladite surface courbe, destinée à s'engager avec une portion solide dudit outil pour s'opposer à un mouvement vers le haut de ladite extrémité terminale supérieure de ladite sonde (28).
EP07023545A 1998-04-20 1999-04-09 Outil d'entraînement d'attaches pour applications d'ajustage Expired - Lifetime EP1894679B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US96314998A 1998-04-20 1998-04-20
EP99400874A EP0951965B1 (fr) 1998-04-20 1999-04-09 Outil d'enfoncement d'éléments de fixation pour travail de finition

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP99400874.6 Division 1999-04-09
EP99400874A Division EP0951965B1 (fr) 1998-04-20 1999-04-09 Outil d'enfoncement d'éléments de fixation pour travail de finition

Publications (3)

Publication Number Publication Date
EP1894679A2 EP1894679A2 (fr) 2008-03-05
EP1894679A3 EP1894679A3 (fr) 2008-05-28
EP1894679B1 true EP1894679B1 (fr) 2010-03-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP07023545A Expired - Lifetime EP1894679B1 (fr) 1998-04-20 1999-04-09 Outil d'entraînement d'attaches pour applications d'ajustage

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Country Link
EP (1) EP1894679B1 (fr)
AT (1) ATE460254T1 (fr)
DE (1) DE69942135D1 (fr)
DK (1) DK1894679T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11376721B2 (en) 2020-05-22 2022-07-05 Milwaukee Electric Tool Corporation Dry-fire lockout and last fastener retention mechanism for powered fastener driver

Family Cites Families (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1603827A1 (de) 1966-10-13 1971-01-28 Dieter Haubold Ind Nagelgeraet Einrichtung an kraftgetriebenen Handgeraeten fuer das Eintreiben von Klammern u.dgl.
US3606128A (en) * 1967-03-07 1971-09-20 Reich Maschf Gmbh Karl Percussion machine for fasteners
US4403722A (en) 1981-01-22 1983-09-13 Signode Corporation Combustion gas powered fastener driving tool
IN157475B (fr) 1981-01-22 1986-04-05 Signode Corp
US4483474A (en) 1981-01-22 1984-11-20 Signode Corporation Combustion gas-powered fastener driving tool
US4483473A (en) 1983-05-02 1984-11-20 Signode Corporation Portable gas-powered fastener driving tool
US4552162A (en) 1983-05-26 1985-11-12 Sioux Steam Cleaner Corporation Electric combination cleaner
US4597517A (en) * 1985-06-21 1986-07-01 Signode Corporation Magazine interlock for a fastener driving device
US4767043A (en) 1987-07-06 1988-08-30 Stanley-Bostitch, Inc. Fastener driving device with improved countersink adjusting mechanism
JP2556818Y2 (ja) 1991-09-21 1997-12-08 株式会社マキタ 釘打機における打込み深さ調整装置
US5263439A (en) 1992-11-13 1993-11-23 Illinois Tool Works Inc. Fuel system for combustion-powered, fastener-driving tool
US5385286A (en) 1994-01-07 1995-01-31 Senco Products, Inc. Adjustable depth control for use with a fastener driving tool
US5685473A (en) 1996-06-07 1997-11-11 Illinois Tool Works Inc. Fastener-driving tool having adjustable controlling mechanism

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11376721B2 (en) 2020-05-22 2022-07-05 Milwaukee Electric Tool Corporation Dry-fire lockout and last fastener retention mechanism for powered fastener driver

Also Published As

Publication number Publication date
ATE460254T1 (de) 2010-03-15
EP1894679A3 (fr) 2008-05-28
DK1894679T3 (da) 2010-06-14
DE69942135D1 (de) 2010-04-22
EP1894679A2 (fr) 2008-03-05

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