EP0510760B1 - Device for a nailing machine - Google Patents

Device for a nailing machine Download PDF

Info

Publication number
EP0510760B1
EP0510760B1 EP19920201076 EP92201076A EP0510760B1 EP 0510760 B1 EP0510760 B1 EP 0510760B1 EP 19920201076 EP19920201076 EP 19920201076 EP 92201076 A EP92201076 A EP 92201076A EP 0510760 B1 EP0510760 B1 EP 0510760B1
Authority
EP
European Patent Office
Prior art keywords
channel
driving apparatus
nail
retainer members
sleeve
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
EP19920201076
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0510760A1 (en
Inventor
Roger Ingelsten
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.)
RAFO KONSTRUKTION HB
Original Assignee
RAFO KONSTRUKTION HB
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 RAFO KONSTRUKTION HB filed Critical RAFO KONSTRUKTION HB
Publication of EP0510760A1 publication Critical patent/EP0510760A1/en
Application granted granted Critical
Publication of EP0510760B1 publication Critical patent/EP0510760B1/en
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
    • B25C1/08—Hand-held nailing tools; Nail feeding devices operated by combustion pressure
    • B25C1/10—Hand-held nailing tools; Nail feeding devices operated by combustion pressure generated by detonation of a cartridge
    • B25C1/18—Details and accessories, e.g. splinter guards, spall minimisers
    • B25C1/188—Arrangements at the forward end of the barrel, e.g. splinter guards, spall minimisers, safety arrangements, silencers, bolt retainers

Definitions

  • the present invention relates to a device for holding fasteners of substantially longitudinal shape, the device being mounted on a driving apparatus having a driver suitable for driving the fasteners into a workpiece, the device having a channel provided with retainer members for positionally fixing the nail.
  • Nail guns of the type mentioned by way of introduction are previously known in the art.
  • these nail guns use has been made of various types of passive retainers for positionally fixing the nail in the channel before the nail gun is fired, so that, for example, the nail does not drop out if the nail gun is pointed with the muzzle facing downwards.
  • Such retainers may have comprised numerous variations of pretensioned or spring-loaded gripping devices or springs which extend partly into the channel and there cooperate with the nail. When firing takes place, the intention is that these springs or gripping devices are, against their pretensioning of the nail or the driver driving the nail, to be moved aside so that the nail and possibly also the driver may pass for driving home the nail.
  • GB-A-1 223 133 which represents the nearest prior art, there is disclosed a nail gun having a safety mechanism intended to prevent firing of the gun when no nail is present.
  • the safety mechanism comprises a spring biased feeler that is, by means of the nail, partly pivoted against the bias out from the feed duct receiving the nail. In this position it is possible to depress a touch member also being a part of the safety mechanism thereby transferring the nail gun to a mode where it could be fired. When firing takes place the feeler is violently hit by the head of the nail and possibly also by the ram driving the nail thereby throwing the feeler out from the duct.
  • the present invention has for its object to devise an apparatus of the type mentioned by way of introduction, the apparatus being designed in such a manner as to obviate the above-mentioned problems.
  • the present invention has for its object to realize an apparatus which provides for a positive withdrawal of the retainer members in the channel accommodating the nail immediately before the nail gun is fired.
  • the present invention is also intended to realize a simple and reliable apparatus which may be manufactured at low cost.
  • the object forming the basis of the present invention is attained by means of a device according to claim 1.
  • One preferred embodiment of the present invention is further characterized by the additional features of claim 2.
  • the preferred embodiment is further suitably characterized by the additional features of claim 3.
  • the present invention implies that the retainer members are provided with mechanical, pneumatic, hydraulic, electric or similar drive means which realize an active and positive withdrawal of the retainer members - so that the nail is released - immediately prior to firing of the nail gun, these drive means being suitably connected so as to be activated by the safety or discharge mechanism of the nail gun.
  • reference numeral 1 relates to a mounting flange by means of which the apparatus according to the present invention is secured on a nail gun of conventional type.
  • the nail gun is provided with drive means (not shown in detail on the Drawing) which are movable in accordance with the double-headed arrow 2 into a tubular channel 3 connecting to the mounting flange 1.
  • drive means not shown in detail on the Drawing
  • the nail On driving home of a nail, the nail is located interiorly in the channel 3 and the head of the nail is struck by the driver whose dimensions and position may be intimated via the broken lines 4.
  • the driver 4 On firing of the nail gun, the driver 4 thus moves at high speed and with great force in a direction to the left in Fig. 1, in such instance shooting the nail ahead of it out of the apparatus so that the nail departs from the apparatus at its muzzle or discharge end 5.
  • the apparatus has a connection 6 for the supply of loose nails which are thus fed singly via a hose (not shown) which is fixed in the connection 6.
  • a nail guide 7, which will be described in greater detail below, connects to the left-hand end of the connection 6 in Fig. 1.
  • a dismountable guide hood 8 is further connected to the nail guide 7, the purpose of the hood being to lead down the forward end of the nail to the firing position in the channel 3.
  • the purpose of the nail guide 7 is to hold the head of the nail and lead the head from the direction of insertion via the connection 6 obliquely downwards to the axial position in the channel 3.
  • Permanent anchorage lugs 9 are disposed on opposing sides of the channel 3 and in association with the mounting flange 1.
  • a pivot shaft 10 extends through the two anchorage lugs 9 aside the channel 3, the shaft being transversely directed in relation to the longitudinal direction of the channel 3 and serving for the pivotal securement of a jaw 11 on either side of the channel 3.
  • an actuator which is, on application of the discharge end of the nail gun to a workpiece, displaceable or movable in towards the nail gun.
  • the actuator is operative, on its movement towards the nail gun, to achieve switching of the retainer members to their positions withdrawn from the channel 3.
  • the actuator is also included in or connected to the safety or discharge mechanism of the nail gun.
  • a sleeve 13 Surrounding the channel 3, there is provided a sleeve 13 which is displaceable in its longitudinal direction and along the channel, which constitutes the above-mentioned actuator, and which has, at its end located at the nail gun, opposing pairs of securement lugs 14. Between each pair of securement lugs 14, there extends a pin or driver 15 (vertical in Fig. 1) which is disposed in a groove 16 in each jaw 11.
  • the portions 17 of the grooves 16 located most distally from the nail gun are obliquely directed in such a manner that their ends located most distally from the nail gun are at greater spaced apart relationship than is the case for the portions of the grooves located more proximally to the nail gun.
  • the drive means 15 will, if these are displaced in a direction to the right in Fig. 2, pivot both of the jaws 11 away from one another so that they are removed from the channel 3.
  • the above-described arrangement with the grooves 16 and drive means 15 constitutes a mechanical drive arrangement for the retainer members, the drive arrangement consisting of a positively operating cam surface and dog device.
  • the above-mentioned grooves 16 are further provided with portions located more proximal the nail gun, these portions being, after partial retraction of the sleeve 13 and, consequential pivoting of the jaws 11 away from one another, approximately parallel with the channel 3 so that a continued retraction of the sleeve 13 may take place without the jaws being influenced in either direction. It should be observed that, during this movement, the jaws are, however, locked in their outwardly pivoted positions outside the inner cross section of the channel 3.
  • the sleeve 13 On its underside, the sleeve 13 has an operating rod 18 with a spring anchorage 19.
  • the mounting flange 1 has a spring anchorage 20, a compression spring 21 being disposed between these spring anchorages and striving to displace the sleeve 13 in a direction away the nail gun, i.e. in a direction to the left in Fig. 1.
  • the operating rod 18 is connected to the safety mechanism of the nail gun in such a manner that, when the sleeve 13 is retracted in a direction towards the nail gun, the nail gun is armed so as to make possible discharge of a nail.
  • the pattern of movement is adapted in such a manner that the first portion of the retraction movement of the sleeve 13 realizes maximum opening of the jaws 11 away from one another, while the subsequent retraction of the sleeve 13 realizes arming and possibly also firing of the nail gun.
  • a longitudinal groove 22 is provided in its upper side, whereby the channel 3 is exposed.
  • the lower edge portion of the guide hood 8 is accommodated in this groove and thus, with its lower side, abuts against the upper side of the channel 3.
  • the channel 3 is provided with a locking heel 23 for securing the forward end of the guide hood 8, the heel also restricting the movement of the sleeve 13 in a direction to the right in the Figures.
  • a seat 24 is correspondingly provided on the nail guide 7 for cooperation with the guide hood 8 so that this held in the correct position. Furthermore, the guide hood may be secured by means of of a screw (not shown on the Drawing).
  • the above-described retainer members are disposed on the jaws 11 on their mutually facing sides, in the form of projecting heels 25 which extend from opposing sides through apertures 26 in the wall of the channel 3 into the free space of the channel.
  • the distance between the heels 25 is adapted so as to permit passage of the nail shaft, but not the head of the nail, see Fig. 2.
  • the sleeve 13 has, in its upper side, a longitudinal groove 27 which is of approximately the same width as the distance between the heels 25 when these are located inserted in the channel 3.
  • the nail guide 7 has interiorly strip-shaped guides 28, which are intimated by broken lines in Fig. 1 and which form therebetween a groove 29 which is suitably of the same width as the distance between the heels 25 and the width of the groove 27.
  • the nail On loading of a nail via the connection 6, the nail arrives tip-first in a direction as illustrated by the arrow 30 in Fig. 1. In this instance, the tip of the nail will pass through the groove 29 so that the nail will, with the greater part of its length, home interiorly in the guide hood 8. Thereafter, the head of the nail strikes both of the guides 28 and the head is led obliquely downwards along the guides in order finally to assume a position behind (the right-hand side of Fig. 2) the heels 25. In this instance, the shaft of the nail will also have passed through the guide hood 8 which has an inner width (at right angles to the plane of the drawing paper of Fig.
  • the nail gun When one firing cycle is to be completed, the nail gun is pressed with its nose against the workpiece, whereafter the sleeve 13 is retracted or cocked in towards the nail gun. At this point, the pins 15 will be displaced along the oblique portions 17 of the grooves 16 so that the jaws 11 are pivoted away from one another, and thereby also the heels 25 are drawn out of the channel 3.
  • this pivoting has been completed, the nail is not prevented from moving in a direction to the left in the Figures, since the heels are, in this position, located outside the cross section of the channel.
  • the pins 15 will have entered into the portions of the grooves 16 located most proximal the nail gun and can continue to move in these grooves in a direction to the right in the Figures, so that an arming of the gun takes place by the action of the operating rod 18.
  • the gun is fired and the nail is driven out of the channel 3 and into the workpiece.
  • the spring 21 forces the sleeve back in a direction to the left in the Figures, for which reason the jaws 11 are once again pivoted towards one another with the heels into the cross section of the channel 3. In this position, a new nail may be loaded via the connection 6 and home in a positionally determined location for discharge in the channel 3.
  • the actuator be designed as the above-described sleeve 13.
  • a rod possibly two
  • Such a rod may, in its end facing towards the nail gun, be provided with a fork which carries the drivers, i.e. the pins 15.
  • the actuator may be designed to operate an electric contact, a pneumatic or hydraulic valve etc., which in turn controls the operation of the drive means working the retainer members.
  • a contact or valve may, naturally, also be connected to the safety or discharge mechanism of the nail gun.
  • the apparatus according to the present invention may, thus, comprise two systems which are wholly or partly parallel to one another.
  • the jaws 11 with the heels 25 have been described as being placed relatively far into the channel 3 in a direction from the muzzle or discharge end 5, whereby engagement took place against the nail head.
  • the jaws 11 may be placed closer to the muzzle so that the engagement from the heels 25 is effected against the nail shaft.
  • the heels 25 extend but partly into the cross section of the channel 3 so that space is left for the nail shaft.
  • the jaws 11 with the heels 25 may also be placed at the muzzle or discharge end 5 in order there to engage with the end of the nail.
  • the heels 25 extend further into the cross section of the channel, possibly so far that the heels meet one another or wholly cover the cross section of the channel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)
  • Toys (AREA)
EP19920201076 1991-04-22 1992-04-15 Device for a nailing machine Expired - Lifetime EP0510760B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE9101200 1991-04-22
SE9101200A SE469162B (sv) 1991-04-22 1991-04-22 Anordning vid spikpistol

Publications (2)

Publication Number Publication Date
EP0510760A1 EP0510760A1 (en) 1992-10-28
EP0510760B1 true EP0510760B1 (en) 1996-03-27

Family

ID=20382525

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19920201076 Expired - Lifetime EP0510760B1 (en) 1991-04-22 1992-04-15 Device for a nailing machine

Country Status (3)

Country Link
EP (1) EP0510760B1 (sv)
DE (1) DE69209355T2 (sv)
SE (1) SE469162B (sv)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20101883A1 (it) * 2010-10-15 2012-04-16 Giancarlo Storti Pinza per una macchina chiodatrice

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1172194B (de) * 1958-12-24 1964-06-11 Reich Maschf Gmbh Karl Druckluftbetaetigtes Geraet zum Einschlagen von Naegeln
DE1603942A1 (de) * 1967-02-28 1971-09-23 Reich Maschf Gmbh Karl Druckluftnagler mit einer Haltevorrichtung fuer den zum Einschlagen in einem Aufnahmekanal bereitgehaltenen Nagel

Also Published As

Publication number Publication date
EP0510760A1 (en) 1992-10-28
SE469162B (sv) 1993-05-24
SE9101200L (sv) 1992-10-23
DE69209355D1 (de) 1996-05-02
SE9101200D0 (sv) 1991-04-22
DE69209355T2 (de) 1996-12-12

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