EP0641629A1 - Dispositif d'alimentation des éléments de fixation - Google Patents

Dispositif d'alimentation des éléments de fixation Download PDF

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Publication number
EP0641629A1
EP0641629A1 EP94306292A EP94306292A EP0641629A1 EP 0641629 A1 EP0641629 A1 EP 0641629A1 EP 94306292 A EP94306292 A EP 94306292A EP 94306292 A EP94306292 A EP 94306292A EP 0641629 A1 EP0641629 A1 EP 0641629A1
Authority
EP
European Patent Office
Prior art keywords
fastener
during
feed
drive track
actuating mechanism
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Withdrawn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
EP94306292A
Other languages
German (de)
English (en)
Inventor
David J. Simonelli
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.)
Stanley Bostich Inc
Original Assignee
Stanley Bostich 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
Priority claimed from US08/112,149 external-priority patent/US5363999A/en
Priority claimed from US08/130,907 external-priority patent/US5370295A/en
Application filed by Stanley Bostich Inc filed Critical Stanley Bostich Inc
Publication of EP0641629A1 publication Critical patent/EP0641629A1/fr
Withdrawn legal-status Critical Current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
    • B25C5/00—Manually operated portable stapling tools; Hand-held power-operated stapling tools; Staple feeding devices therefor
    • B25C5/16—Staple-feeding devices, e.g. with feeding means, supports for staples or accessories concerning feeding devices
    • B25C5/1606—Feeding means
    • B25C5/1624—Feeding means employing mechanical feeding means

Definitions

  • the present invention relates to a fastener feeding apparatus for a fastener driving device, and in particular for a fastening device used in continuous production lines having a feeding mechanism for feeding successive fasteners into the drive track of the device.
  • a mechanism To increase the force on the staples at the nose of the device, a mechanism has been used including a friction clutch and a wheel connected to an electric motor. Thus, as the motor turns, the clutch maintains a certain torque on the wheel which in turn keeps a constant forward force on the staples. When a staple is driven, the remaining staples are fed and held forward toward the drive track.
  • Other conventional feed mechanisms use a ratchet to hold and feed staples to the drive track. The feed is made under spring pressure and the cycling action for the feed stroke comes during the power stroke of the device. It is common to connect the return piston to a source of air under pressure which is communicated in response to the actuation of the device.
  • the conventional ratchet is recycling or retracting during the drive stroke and the fastener which has already been fed into the drive track is held therein by a holding pawl.
  • the present invention seeks to provide fastener feeder apparatus having advantages over known feeder apparatus.
  • fastener feeder apparatus for moving successive leading fasteners of a fastener package in a feeding direction along a feed track and into a drive track of fastener driving apparatus to be driven by a fastener driving element during the drive stroke thereof and outwardly of said drive track into a workpiece, characterised by an actuating mechanism arranged to be mounted to said fastener driving apparatus for movement through an operating cycle including an operative stroke in the feeding direction along said fastener feed track toward said drive track for feeding fasteners to said drive track and a return stroke, and a fastener holding mechanism operatively coupled to said actuating mechanism for movement therewith through said operating cycle thereof, whereby during the operative stroke of said actuating mechanism said fastener holding mechanism feeds said fasteners along said feed track and holds said fasteners in a position biased toward said drive track during at least a portion of the drive stroke so that a leading fastener from said fastener package is disposed in the drive track in position to be contacted by said driving element,
  • the present invention is advantageous in that it can provide fastener feeding apparatus for a fastener driving device which requires no additional power source to hold the staples in the drive track and which permits a supply of fasteners to be fed to the drive track continuously, limited only by the supply of fasteners provided.
  • said actuating mechanism includes a spring member which biases said holding mechanism and thus said fasteners toward said drive track during the operative stroke and a piston having an actuating rod coupled to said holding mechanism, said piston being slidingly received in a cylinder to be pneumatically connected to a plenum chamber of said fastener driving apparatus so as to be supplied with plenum air after said drive element moves downward within said drive track and contacts the leading fastener, and said piston being arranged to be moved by the plenum air so as to overcome the bias of said spring member permitting said actuating rod to cause said holding mechanism to release from its holding position, and said spring member being arranged to bias said holding mechanism and thus the fasteners again toward said drive track in response to the plenum air supplied to said piston exhausting after completion of the return stroke of said driving element so that another fastener may be disposed within said drive track to be contacted by said driving element.
  • the feeding mechanism may be advantageously signalled by the device's plenum air and is automatically timed to the device's engine cycle.
  • a fastener drive apparatus including a nose piece assembly defining an elongated drive track receiving a fastener driving element therein movable through an operating cycle including a drive stroke and return stroke, and a fastener feeding track communicating laterally with the drive track
  • an improved mechanism for feeding fasteners from a fastener package into a position to be driven by the fastener driving element during the drive stroke thereof can be provided.
  • the feeding mechanism includes an actuating mechanism mounted for movement through an operating cycle including (1) an operative stroke in a direction along the fastener feeding track toward the drive track for feeding fasteners to the drive track and (2) a return stroke.
  • a fastener holding mechanism is also provided and is operatively coupled to the actuating mechanism for movement therewith through the operating cycle thereof, whereby during the operative stroke of the actuating mechanism the fastener holding mechanism holds the fasteners in position biased toward the drive track during at least a portion of the drive stroke so that a leading fastener from the fastener package is disposed in the drive track in position to be contacted by the driving element.
  • the fastener holding mechanism is released from the fasteners during the return stroke of the actuating mechanism, during a portion of the operating cycle of the driving element when a fastener need not be held in the drive track.
  • a particular advantage of the present invention is the provision of fastener feeder apparatus which is simple in construction, effective in operation and economical to manufacture and maintain.
  • the invention also provides for fastener driving apparatus having fastener feeder apparatus as defined above.
  • a fastener driving device generally indicated at 10 having a fastener feeding mechanism, generally indicated at 12, embodying the principle of the present invention.
  • the device 10 includes the usual fastener driving element 14 which is moved through an operating cycle including a drive stroke and a return stroke preferably by a conventional pneumatic system (not shown).
  • the device 10 includes a rigid housing 16 including a nose piece 18 having internal surfaces defining an elongated drive track 20.
  • a staple magazine assembly 22 is secured to the nose piece 18 and extends rearwardly therefrom.
  • the magazine assembly 22 may be of any conventional design, is adapted to receive a supply of staples in the form of a staple stick and support and guide the staples forwardly along a feed track 23 into the drive track to be driven outwardly thereof by the staple driving element 14. As shown in FIG. 1, a portion of the staple stick is exposed, the function of which will become apparent below.
  • the feeding mechanism 12 includes an actuating mechanism generally indicated at 24 and a fastener holding mechanism, generally indicated at 26.
  • the actuating mechanism includes a cylinder 28 coupled to the device 10 at one end thereof.
  • a piston 30 is slidably mounted within the cylinder and has a piston actuating rod 32 formed thereon extending outwardly of the cylinder. The outer end of the actuating rod 32 is coupled to the holding mechanism.
  • the piston-cylinder arrangement may be of any conventional design, for example, Model No. O1DX manufactured by BIMBA.
  • the actuating mechanism also includes an air inlet portion 34 which communicates with the plenum chamber 36 of the device 10 via tube 38 and connector 39, the function of which will become apparent below.
  • the actuating mechanism 24 further includes a spring 40 coupled to the holding mechanism 26 at one end thereof, with the other end being in contact with a surface of the inlet portion 34. The spring 40 normally biases the holding mechanism in a direction toward the drive track.
  • the fastener holding mechanism 26 includes a feed block 41 supporting a pair of holding pawls 42 disposed on opposing sides of the staple stick 45.
  • Each holding pawl 42 is pivotally coupled to the feed block 41 by a pin 44 at one end thereof.
  • a compression spring 46 is coupled to an opposite end of each holding pawl 42 at a position offset from an axis of the pin 44. The other end of the compression spring 46 is coupled to the feed block 41.
  • Each holding pawl 42 includes an angled surface 43 terminating at engaging edge 48. Edge 48 contacts a point between staples of the exposed side portion of the staple stick due to the bias of spring 40.
  • Spring 40 normally biases the holding mechanism in a position toward the drive track during an operating stroke of the actuating mechanism.
  • the forward motion of the holding mechanism 26 causes the holding pawls 42 to contact the staple stick so as to hold the staple stick, due to a moment created by the compression springs 46 being offset from the pins 44.
  • the spring 40 ensures that a leading staple of the staple stick is disposed in the drive track.
  • the driving element then moves downward within the drive track and contacts the leading staple. When the driving element has sheared off the leading staple and is part-way through its drive stroke, the driving element passes plenum feed holes 52 in cylinder sleeve 54.
  • pressurized air then flows into plenum chamber 36 which is fed through tube 38 and into the pneumatic cylinder 28.
  • the pressurized air moves the piston 30 in a direction away from the drive track compressing the spring 40, thus permitting the holding mechanism 26 to move away from the drive track during a return stroke of the actuating mechanism.
  • the holding mechanism is pulled-back in a direction away from the feeding direction by the pneumatic cylinder 30, the holding pawls 42 ratchet-off the staple stick while maintaining contact therewith, due to the force of inertia of the remaining staples acting on angled surface 43 of the holding pawls 42.
  • the angle of surface 43 and the spring force of springs 46 are such that the holding pawls ratchet-off successive staples, thus, not pulling the staples back along the feed track toward the cylinder 30.
  • the holding pawls move from their holding position during the return stroke of the actuating mechanism, during a portion of the operating cycle of the device 10 when it is not critical to hold the staples securely in the nose piece 18.
  • the plenum air is exhausted through the nose piece 18 and removed from the cylinder 30 which causes spring 40 to expand and again push the holding mechanism 26 toward the drive track which moves the holding pawls into their holding position to move the fasteners forward along the feed track and to hold a leading staple of the fastener package in the drive track.
  • the fastener feeding mechanism offers numerous advantages over prior art devices. Since feeding and holding of the staples is not performed from behind the staple stick, feeding is only limited by the length of the staple stick and need not be interrupted, for example, to retract a pusher.
  • the mechanism requires no extra power source to be connected to the device.
  • the mechanism is signaled by the device's plenum air and is automatically timed to the operating cycle.
  • the plenum air is used against a spring, the mechanism is efficient.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Dovetailed Work, And Nailing Machines And Stapling Machines For Wood (AREA)
EP94306292A 1993-08-26 1994-08-25 Dispositif d'alimentation des éléments de fixation Withdrawn EP0641629A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US08/112,149 US5363999A (en) 1993-08-26 1993-08-26 Fastener feeder having vibratory brush
US112149 1993-08-26
US130907 1993-10-04
US08/130,907 US5370295A (en) 1993-10-04 1993-10-04 Feed mechanism for gravity feed tackers

Publications (1)

Publication Number Publication Date
EP0641629A1 true EP0641629A1 (fr) 1995-03-08

Family

ID=26809633

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94306292A Withdrawn EP0641629A1 (fr) 1993-08-26 1994-08-25 Dispositif d'alimentation des éléments de fixation

Country Status (4)

Country Link
EP (1) EP0641629A1 (fr)
JP (1) JPH07164349A (fr)
AU (1) AU673093B2 (fr)
CA (1) CA2126943A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3524390B1 (fr) 2018-01-19 2022-03-30 Max Co., Ltd. Outil d'enfoncement
US11279014B2 (en) 2018-01-19 2022-03-22 Max Co., Ltd. Gas combustion type driving tool
JP7031324B2 (ja) * 2018-01-19 2022-03-08 マックス株式会社 ガス燃焼式打込み工具
US20190224832A1 (en) 2018-01-19 2019-07-25 Max Co., Ltd. Driving tool

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB110898A (en) * 1917-08-02 1917-11-08 Louis Saul Jeffay Improvements in and relating to Hand Stapling Machines.
US3174672A (en) * 1963-03-06 1965-03-23 Senco Products End loading staple magazine
BE730903A (fr) * 1969-04-02 1969-09-15
DE1778562A1 (de) * 1968-05-11 1971-10-28 Langensiepen Kg M Vorrichtung zum Anbringen von Stecknieten
EP0119542A1 (fr) * 1983-03-11 1984-09-26 Signode Corporation Outil pour chasser des clous

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB110898A (en) * 1917-08-02 1917-11-08 Louis Saul Jeffay Improvements in and relating to Hand Stapling Machines.
US3174672A (en) * 1963-03-06 1965-03-23 Senco Products End loading staple magazine
DE1778562A1 (de) * 1968-05-11 1971-10-28 Langensiepen Kg M Vorrichtung zum Anbringen von Stecknieten
BE730903A (fr) * 1969-04-02 1969-09-15
EP0119542A1 (fr) * 1983-03-11 1984-09-26 Signode Corporation Outil pour chasser des clous

Also Published As

Publication number Publication date
AU673093B2 (en) 1996-10-24
AU7147094A (en) 1995-03-09
CA2126943A1 (fr) 1995-02-27
JPH07164349A (ja) 1995-06-27

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