DK2783796T3 - Safety device for activating a nail gun. - Google Patents

Safety device for activating a nail gun. Download PDF

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Publication number
DK2783796T3
DK2783796T3 DK14161924.7T DK14161924T DK2783796T3 DK 2783796 T3 DK2783796 T3 DK 2783796T3 DK 14161924 T DK14161924 T DK 14161924T DK 2783796 T3 DK2783796 T3 DK 2783796T3
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DK
Denmark
Prior art keywords
trigger
arm
probe
pin
arm means
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DK14161924.7T
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Danish (da)
Inventor
Marco Ronconi
Original Assignee
Fasco Srl
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Publication of DK2783796T3 publication Critical patent/DK2783796T3/en

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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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Description

DESCRIPTION
[0001] The present invention concerns the safety device for nail application and in particular it relates to a safety device for actuating a nailer. Such a safety device, as per the preamble to independent claim 1, is known from document US 2009/108016 A.
[0002] There are known nailers equipped with a trigger for expelling, or shooting, a nail and with a safety device comprising a probe placed near the output for the nail and movable between a normal position, or protruding, in which it prevents the nail ejection blocking or disabling the trigger and a retracted condition, reachable putting the output nail region of the nailer against the part to be nailed, in which the safe is disabled and the trigger is enabled for firing; the fire takes place each time a condition is reached in which the probe means is set back and the trigger is pressed.
[0003] In some fields, for example the packaging preparation, operators use the safe as a nail eject command, keeping the trigger pressed and putting the ejection portion of the nailer in rapid succession onto the areas to be nailed so as to apply nails with extreme speed.
[0004] To reduce the risks arising from this practice, nailer machines were introduced to be equipped with a selector lever for the operation, usually placed near the trigger, which allows to select two operation modes: repeat mode, also known as hammer mode, in which the nail ejection is controlled by the secure probe contact with the work piece while the operator keeps pressed the trigger, and a single-shot mode in which the trigger release is needed after a shot to prepare the nailer for the subsequent ejection that occurs only if first of all the probe is in contact position and then the trigger is pressed.
[0005] A disadvantage of this type of known drive mechanism consists in that the operators may handle the nailer without checking the position of the selection lever and, sometimes due to bridge lack, activating and keep pressing the trigger, if the selection lever was in firing hammer or repeat position, there is a dangerous condition because the safe probe could contact a body part of operator or onlooker so causing personal injury.
[0006] One object of the present invention is to propose a safety device for the actuation a nailer which requires active and conscious operation by the operator for nail ejection with hammer mode.
[0007] Another object is to propose a device switching off the repeat ejection mode as soon as the operator leaves the nailer. The safety device which attains these objects is disclosed in the attached claim 1.
[0008] The characteristics of the invention are highlighted in the following with particular reference to the accompanying drawings, in which: • figure 1 shows a partially sectioned view of the safety device for actuating a nailer, object of the present invention, associated with a firing button of said nailer, of which is represented a small portion, comprising the inner portion of a probe means represented in continuous and dashed lines, respectively, in its protruding and retracted condition, where a ring before a first trigger is a finger of an operator before acting on the trigger itself; • figure 2 shows a partial and rear view of the safety device of figure 1; • figure 3 shows a view of the device and parts of figure 1 in which the probe means is in its retracted condition in which the ejection of the nail is enabled; • figure 4 shows a reduced view of the device and parts of figure 3 in a condition immediately subsequent to the nail firing as a result of the first trigger activation, and subsequent to removal of the device from the nail application area; • figure 5 shows a reduced view of the device and parts of figure 1 from which it differs because a finger of an operator has actuated a second trigger enabling the hammer operation; another finger is placed in contact with the first trigger without activate this latter and the probe means represented in continuous lines is in its protruding or shot disabling condition; • figure 6 shows a view of the device and parts of figure 5 from which differs because the probe means, represented in continuous line, is in its retracted condition enabling the shot; • figure 7 shows a view of the device and parts of figure 5 from which it differs for the fact that the fingers have operated both triggers so causing the shot that can be repeated due to the probe by the hammer operation until the triggers release.
[0009] With reference to figures 1 - 7, numeral 1 indicates the safety device for actuating a nailer, object of the present invention.
[0010] The nailer, for example of pneumatic type for nails, staples or the like, is provided with a firing button 5, of known type, and safety means comprising a probe means 9, of which the figures illustrate only the inner end portion, having the inner end 11 lying in the device 1 or close to nailer controls.
[0011] The probe means 9 and the respective inner end 11 translate along their longitudinal axis, which is approximately parallel to the direction of nails ejection, between a retracted condition R, facing the interior of the nailer, and a protruding condition S, toward the shot direction.
[0012] The probe means 9 is elastically pushed by elastic means, not shown, towards outside, along the nails shooting direction, or towards the protruding condition S.
[0013] The device 1 also comprises a first trigger 15 rotating around a first pin 17 for connecting the nailer, on a plane parallel to the motion direction of the firing button 5 and approximately coincident with the symmetry median plane of the nailer.
[0014] The rotating first trigger 15 may be of the type obtained by die-cutting and bending of a metal plate and, as in the example of the figures, can be constituted by two shaped plates parallel and joined in correspondence of the finger action area of an operator. The first trigger 15 is provided with a spring, not shown, which elastically pushes this latter outwards or towards the shooting direction in order to keep it in the normal rest condition without the actuation of the operator's finger.
[0015] The first pin 17, for example fixed or housed in seats carried out at the ends of the two plates of the first trigger opposite to the finger zone, is perpendicular to the actuation motion of the firing button 5 and to the rotation plane of the first trigger for example coincident with the geometric median plane between the two plates.
[0016] The device 1 is also equipped with an arm means 19, approximately shaped as tuning fork or two teeth fork, and a second trigger 27 plate shaped and swivelling connected to the first trigger 15 by a second rotation pin 29, parallel to the first pin 17.
[0017] The arm means 19 includes a first end 21, an end portion 23 opposite the first end and fit to abut slidingly with the inner end 11 of the probe means 9 and a central portion fit to act onto the button 5 for operating the latter.
[0018] The first end 21 of the arm means 19 is interconnected to the first 15 and second 27 triggers for moving it.
[0019] The terminal portion 23 may be tapered or otherwise shaped to facilitate the sliding against the inner end 11 of the probe means 9.
[0020] The second trigger 27, at outer and inner ends of its rotation arc with respect to the first trigger 15, has two opposite operating and releasing conditions respectively corresponding to the single shoot condition C and the hammer shoots condition M.
[0021] In the first release position, in wlnich the operator does not act onto the second trigger and corresponding to the single shot condition C, the second trigger 27 leaves the first end 21 of the arm means 19 in a position for which the opposite end portion 23 of arm means 19 disengages from the inner end 11 of the probe means 9 when the latter 9 moves from the retracted condition R towards the protruding condition S, with the first trigger maintained in the firing position, so preventing the firing of a second shot until the first trigger release.
[0022] Alternatively, the invention provides that the arm means 19 is slightly shorter to disengage from the inner end 11 of the probe means 9 when the first trigger 15 exceeds the actuation position of the button 5 towards its end operating position, in this way is inhibited the ability to shoot more nails at the same point while always keeping the probe means 9 in the retracted condition R and acting more times onto the first trigger.
[0023] In said second operating position, in which the operator acts onto the second trigger and keeping it in the operating condition corresponding to hammer shoots condition M, the end portion 23 of the arm means 19 remains engaged to the inner end 11 of the probe means 9 in each position of the latter and of the first trigger, since the activation of the second trigger moves the arm 19 toward the translation direction of the probe means 9.
[0024] In particular, the first end 21 of the arm means 19 is swivelling and translating connected to the first trigger 15 and the second trigger 27 has a displacement means 31 acting onto the first end 21 of the arm means 19 translating it towards the probe means 9. The first end 21 of the arm means 19 carries a third pin 35 parallel to the first pivot 17 and engaged, in a freely rotating and slidingly, with a slot means 37 formed in the first trigger 15 and having a longitudinal geometric axis preferably perpendicular or inclined with respect to the translation direction of the probe means 9. Preferably the slot means 37 involves both the parallel plates of the first trigger, so both end portions of the third pin 35 slide into respective seats of the slot means 37 carried out in the faced portions of the plates.
[0025] The shifting means 31 of the second trigger 27 preferably has a cam protruding profile slidingly acting onto the first end 21 of the arm means 19 or onto the respective third pivot 35, or, alternatively, the shifting means 31 consists of a second slot means formed in a protrusion of the second trigger 27 and tilted compared to the first slot means 37 and slidingly engaged by said third pivot 35.
[0026] The invention also provides a further alternative embodiment of the interconnection between the first end 21 of the arm means 19 and the triggers first 15 and second 27, not shown in the figures because of its easy understanding. In this different interconnection embodiment, the first end 21 of the arm means 19 is connected, as connecting rod, via a rotating pin to a protrusion of the second trigger 27, which actuation moves the first end 21 of the arm mean 19 toward the probe means 9.
[0027] Returning now to the interconnection shown in figures, the first trigger 15 is equipped with a stop means 39 fit to abut with the arm means 19, defining the position, at least when the triggers 15, 27 are not actuated. The device 1 is also provided vwth first spring means fit to elastically push the arm means 19 towards said abutment position with the stop means.
[0028] The third pin 35 is movable into the slot means 37, is engaged to the first end 21 (preferably fork shaped as previously indicated) of the arm means 19 and is engaged in a freely rotatable way to a seat means 41, preferably housed in the cavity between the teeth of the first fork end 21.
[0029] The seat means 41 can be wheel shaped with radial cavity designed to accommodate an end of a first spring means 43, of compressed helical type, whose remaining end is fixed to the first trigger 15 for example by a mount displaced in a finger portion closest to the probe means 9. The first spring means 43 acts elastically onto the seat means 41 and the first end 21 in the removal direction of this latter from the probe means 9.
[0030] The second trigger 27, wfnich is preferably placed between the parallel plates of the first trigger, is provided with a second spring means 45 which pushes elastically towards a contact position with a first finger position of the trigger 15.
[0031] The length of the arm 19, or the distance between the rotation axis of the first end 21 of the arm means and the end of the respective opposite end portion 23, is between the distances from the inner end 11, of the probe means 9, to opposite end of this Iatter9 of the slot means 37, to which the third pin 35 radius is subtracted, in the single shoot condition C and protruding condition S of probe means 9 when the first trigger 15 is respectively released and activated in the firing position.
[0032] The longitudinal dimension of the slot means 37 and the difference between the minimum and maximum radii of the protruding cam profile of the displacement means 31 of the second trigger 27 are such that in the hammer shoots condition M, the end portion 23 of the arm means 19 opposite to respective first end 21 is always in abutment with the inner end 11 of the probe means 9 in any position of the first trigger 27.
[0033] The operation of the single-shot device requires that the operator puts the nail output at the point to be nailed, thereby placing the probe means 9 in retracted condition R, and that said operator acts, with the finger, onto the first trigger causing the nail firing; the subsequent device removal from the nailed point, with consequent return of probe means 9 into protruding condition S and the first trigger release places the nailer and the device in a start firing condition.
[0034] The operation of the hammer or repeating device provides that the operator puts the nail output of the device in correspondence of the nailing point, thus putting the probe means 9 in the retracted condition R, and acting with a finger onto the second trigger and that with another finger on the first trigger is caused the nail firing. The subsequent device removal from the nailed point, with consequent return of the probe means 9 into the protruding condition S maintaining operated the triggers, places the device in a further firing condition obtainable simply by positioning the nail output in correspondence with another point to be nailed.
[0035] An advantage of the present invention is to provide a safety device for operating a nailer that requires an active operation by the operator for the nail ejection in hammer mode.
[0036] Another advantage is to provide a device which will switch off the repetition ejection mode of the nailer when the operator leaves the nailer.
REFERENCES CITED IN THE DESCRIPTION
This list of references cited by the applicant is for the reader's convenience only. It does not form part of the European patent document. Even though great care has been taken in compiling the references, errors or omissions cannot be excluded and the EPO disclaims all liability in this regard.
Patent documents cited in the description • US20091080f6Af0001l

Claims (9)

1. Sikkerhedsindretning til aktivering af en sømpistol af en type, der er forsynet med en affyringsknap (5) og sikkerhedsmiddel indbefattende et probemiddel (9) med en indre ende (11), som kan bevæges langs sin længdeakse omtrent parallelt med sømudstødningsretningen mellem en tilbagetrukket tilstand (R) og en fremspringende tilstand (S), der vender mod skydningsretningen og mod hvilken den er elastisk skubbet af elastiske midler; og indretningen (1) omfatter: - en første udløser (15), der roterer i et plan parallelt med aktiveringsretningen af knappen (5), omkring en første tap (17) vinkelret på sidstnævnte retning og fastgjort til sømpistolen; - et armmiddel (19) med en første ende (21), en endedel (23) modsat den første ende og udformet til at glide mod den indre ende (11) af probemidlet (9) og en central del udformet til at virke på knappen (5) for drift af sidstnævnte (5); - en anden udløser (27) drejet til den første udløser (15) ved hjælp af en anden rotationstap (29), som er parallel i forhold til den første tap (17); hvor den første (15) og den anden (27) udløser er indbyrdes forbundet med den første ende (21) af armmidlet (19), og sidstnævnte (19) flyttes af udløserne; og den anden udløser (27) antager to positioner i forhold til den første (15) og henholdsvis placerer den første ende (21) af armmidlet (19) i en enkeltskudstilstand (C), hvor den respektive endedel (23) går ud af indgreb med den indre ende (11) af probemidlet (9), når probemidlet (9) bevæger sig fra den tilbagetrukne tilstand (R) mod den fremspringende tilstand (S), eller når den første udløser (15) overskrider aktiveringspositionen af knappen (5) mod dens aktiveringsendeposition og i en hammerskudstilstand (M), hvor endedelen (23) af armmidlet (19) altid forbliver i indgreb med den indre ende (11) af probemidlet (9); og indretningen (1) er kendetegnet ved, at den anden udløser (27) er forsynet med et andet fjedermiddel (45), som elastisk skubber den hen imod en position med berøring af en fingerdel af den første udløser (15).A safety device for activating a nail gun of a type provided with a firing button (5) and security means including a probe means (9) having an inner end (11) movable along its longitudinal axis approximately parallel to the seam ejection direction between a retracted condition (R) and a protruding state (S) facing the direction of firing and against which it is resiliently pushed by resilient means; and the device (1) comprises: - a first trigger (15) rotating in a plane parallel to the actuation direction of the button (5), about a first pin (17) perpendicular to the latter direction and attached to the nail gun; an arm member (19) having a first end (21), an end portion (23) opposite the first end and configured to slide against the inner end (11) of the probe means (9) and a central portion configured to act on the button (5) for operation of the latter (5); a second trigger (27) rotated to the first trigger (15) by a second rotation pin (29) which is parallel to the first pin (17); wherein the first (15) and the second (27) actuators are interconnected with the first end (21) of the arm means (19) and the latter (19) are moved by the actuators; and the second trigger (27) assumes two positions relative to the first (15) and respectively places the first end (21) of the arm means (19) in a single shot state (C), with the respective end portion (23) exiting. with the inner end (11) of the probe means (9) as the probe means (9) moves from the retracted state (R) toward the protruding state (S), or when the first trigger (15) exceeds the activation position of the button (5) toward its activation end position and in a hammer shot state (M), wherein the end portion (23) of the arm means (19) always remains in engagement with the inner end (11) of the probe means (9); and the device (1) is characterized in that the second trigger (27) is provided with a second spring means (45) which resiliently pushes it towards a position with a finger part of the first trigger (15). 2. Indretning ifølge krav 1, kendetegnet ved, at den første ende (21) af armmidlet (19) er drejeligt og bevægelsesoverførbart forbundet med den første udløser (15), og den anden udløser (27) bærer et forskydningsmiddel (31), der virker på den første ende (21) af armmidlet (19) og forskyder sidstnævnte (21) mod probemidlet (9).Device according to claim 1, characterized in that the first end (21) of the arm means (19) is pivotally and movably connected to the first trigger (15) and the second trigger (27) carries a displacement means (31) which acts on the first end (21) of the arm means (19) and displaces the latter (21) toward the probe means (9). 3. Indretning ifølge krav 2, kendetegnet ved, at den første ende (21) af armmidlet (19) bærer en tredje tap (35), som er parallel med den første tap (17), og som frit kan dreje og er i glidende indgreb med et rillemiddel (37) udført i den første udløser (15), hvilket har en langsgående geometrisk akse, der er vinkelret eller skrå i forhold til overførselsretningen af probemidlet (9).Device according to claim 2, characterized in that the first end (21) of the arm means (19) carries a third pin (35) which is parallel to the first pin (17) and which can freely rotate and is sliding engaging with a groove means (37) performed in the first trigger (15), which has a longitudinal geometric axis perpendicular or oblique to the direction of transmission of the probe means (9). 4. Indretning ifølge krav 2 eller 3, kendetegnet ved, at forskydningsmidlet (31) af den anden udløser (27) består af en fremspringende kamprofil, der på en glidende måde virker på den første ende (21) af armmidlet (19) eller på den respektive tredje tap (35), eller består af et andet rillemiddel realiseret i et fremspring af den anden udløser (27), skråtstillet i forhold til det første rillemiddel (37) og i glidende indgreb med den tredje tap (35).Device according to claim 2 or 3, characterized in that the displacement means (31) of the second trigger (27) consists of a protruding cam profile which acts in a sliding manner on the first end (21) of the arm means (19) or on the the respective third pin (35), or consists of a second groove means realized in a projection of the second trigger (27), inclined with respect to the first groove means (37) and in sliding engagement with the third pin (35). 5. Indretning ifølge ethvert af de foregående krav kendetegnet ved, at den første udløser (15) er forsynet med et stopmiddel (39) udformet til at ligge an mod armmidlet (19), bestemmende positionen af sidstnævnte, i det mindste når udløserne (15, 27) ikke er aktiveret, og indretningen (1) er forsynet med første fjedermiddel dedikeret til elastisk at skubbe armmidlet (19) mod nævnte anlægsposition med stopmidlet.Device according to any one of the preceding claims, characterized in that the first trigger (15) is provided with a stop means (39) designed to abut the arm means (19), determining the position of the latter, at least when the trigger (15) (27) is not actuated and the device (1) is provided with a first spring means dedicated to elastically push the arm means (19) towards said abutment position with the stop means. 6. Indretning ifølge ethvert af de foregående krav kendetegnet ved, at den tredje tap (35), som kan bevæges ind i rillemidlet (37), foruden at være i indgreb med den første, fortrinsvis gaffelformede, ende (21) af armmidlet (19), er frit drejeligt i indgreb med et sædemiddel (41), fortrinsvis indlejret i hulrummet af den fortrinsvis gaffelformede første ende (21); og sædemidlet (41) huser en ende af et første fjedermiddel (43), hvis anden ende er fastgjort til den første udløser (15) og virker elastisk på sædemidlet (41) og på den første ende (21) i fjernelsesretning af sidstnævnte fra probemidlet (9).Device according to any one of the preceding claims, characterized in that the third pin (35) which can be moved into the groove means (37), in addition to engaging the first, preferably fork-shaped, end (21) of the arm means (19) ) is freely rotatably engaged by a seat means (41), preferably embedded in the cavity of the preferably fork-shaped first end (21); and the seat means (41) houses an end of a first spring means (43), the second end of which is attached to the first trigger (15) and acts elastically on the seat means (41) and on the first end (21) in the removal direction of the latter from the probe means. (9). 7. Indretning ifølge ethvert af de foregående krav kendetegnet ved, at længden af armen (19), hvilken er afstanden mellem rotationsaksen af samme armmiddels første ende (21) og den respektive modsatte endedel (23), er i intervallet mellem afstandene fra den indre ende (11) af probemidlet (9) til enden af rillemidlet (37) modsat i forhold til probemidlet (9) fratrukket radius af den tredje tap (35) i tilstandene af enkeltskud (C) og fremspringende (S) probemiddel (9), når den første udløser (15) er henholdsvis udløst og aktiveret i affyringsposition.Device according to any one of the preceding claims, characterized in that the length of the arm (19), which is the distance between the axis of rotation of the first end (21) of the same arm means and the respective opposite end part (23), is in the interval between the distances from the inner end (11) of the probe means (9) to the end of the groove means (37) opposite to the probe means (9) less the radius of the third pin (35) in the single shot (C) and protruding (S) probe means (9), when the first trigger (15) is respectively triggered and activated in firing position. 8. Indretning ifølge krav 7, kendetegnet ved, at den længdedimensionen af rillemidlet (37) og forskellen mellem minimum og maksimum af radius af kamprofilen, som fremspringer fra forskydningsmidlet (31) af den anden udløser (27), er således, at i hammerskudstilstanden (M) ligger endedelen (23) af armmidlet (19) modsat den respektive første ende (21) altid an mod den indre ende (11) af probemidlet (9) i hver position første udløser (27).Device according to claim 7, characterized in that the longitudinal dimension of the groove means (37) and the difference between the minimum and maximum radius of the cam profile which protrudes from the displacement means (31) of the second trigger (27) is such that in the hammer shot state (M), the end portion (23) of the arm means (19) opposite the respective first end (21) always abuts the inner end (11) of the probe means (9) in each position of the first trigger (27). 9. Indretning ifølge krav 1, kendetegnet ved, at den første ende (21) af armmidlet (19) er forbundet ved hjælp af en drejetap til et fremspring af den anden udløser (27), hvis aktivering bevæger den første ende (21) af armmidlet (19) mod probemidlet (9).Device according to claim 1, characterized in that the first end (21) of the arm means (19) is connected by a pivot to a projection of the second trigger (27), the actuation of which moves the first end (21) of the arm means (19) against the probe means (9).
DK14161924.7T 2013-03-29 2014-03-27 Safety device for activating a nail gun. DK2783796T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000138A ITBO20130138A1 (en) 2013-03-29 2013-03-29 SAFETY DEVICE FOR DRIVING A NAILING MACHINE

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IT (1) ITBO20130138A1 (en)

Families Citing this family (4)

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Publication number Priority date Publication date Assignee Title
US20180009097A1 (en) * 2016-07-06 2018-01-11 Tti (Macao Commercial Offshore) Limited Powered fastener driver
US20180207777A1 (en) * 2016-07-06 2018-07-26 Tti (Macao Commercial Offshore) Limited Powered fastener driver
WO2021241100A1 (en) * 2020-05-29 2021-12-02 工機ホールディングス株式会社 Driver machine
CN117885067B (en) * 2024-03-15 2024-05-28 四川圣亚凯紧固器材有限公司 Nail shooting firing device

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Publication number Priority date Publication date Assignee Title
IT7822126V0 (en) * 1978-06-16 1978-06-16 Monacelli Umberto TRIGGER SAFETY DEVICE FOR THE CONTROL OF MANUAL APPLIANCES FOR THE FIXING OF NAILS AND SIMILAR.
US5551621A (en) * 1994-08-10 1996-09-03 Stanley-Bostitch, Inc. Convertible contact/sequential trip trigger with double actuation prevention structure
US6059161A (en) * 1999-08-19 2000-05-09 Nailermate Enterprise Corporation Assembly of a power stapler
US6860416B1 (en) * 2003-10-27 2005-03-01 Aplus Pneumatic Corp. Single-shot nail stapler
US7152773B2 (en) * 2005-03-23 2006-12-26 Rexon Industrial Corp., Ltd. Trigger selector for a nail gun
US7464843B2 (en) * 2007-02-06 2008-12-16 De Poan Pneumatic Corp. Trigger switch mechanism of nail gun
US20090108046A1 (en) * 2007-10-24 2009-04-30 Chi-Sheng Huang Trigger Switch Mechanism for Nail Gun

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EP2783796B1 (en) 2015-10-14
ITBO20130138A1 (en) 2014-09-30

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