EP2161106A1 - Outil entraînant une attache disposant d'une poignée - Google Patents

Outil entraînant une attache disposant d'une poignée Download PDF

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Publication number
EP2161106A1
EP2161106A1 EP08015757A EP08015757A EP2161106A1 EP 2161106 A1 EP2161106 A1 EP 2161106A1 EP 08015757 A EP08015757 A EP 08015757A EP 08015757 A EP08015757 A EP 08015757A EP 2161106 A1 EP2161106 A1 EP 2161106A1
Authority
EP
European Patent Office
Prior art keywords
fastener driving
grip
driving tool
control means
handle portion
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Withdrawn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
EP08015757A
Other languages
German (de)
English (en)
Inventor
Jonas Zachrisson
Martin Torstensson
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.)
Josef Kihlberg AB
Original Assignee
Josef Kihlberg AB
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 Josef Kihlberg AB filed Critical Josef Kihlberg AB
Priority to EP08015757A priority Critical patent/EP2161106A1/fr
Publication of EP2161106A1 publication Critical patent/EP2161106A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/006—Vibration damping means
    • 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
    • B25C1/043—Trigger valve and trigger mechanism

Definitions

  • the invention concerns a pneumatic fastener driving tool comprising a housing assembly including a main housing portion and a handle portion with a grip, extending from the main housing portion, whereas a cylinder, a piston which is movable arranged within the cylinder, and a fastener driving element which is operatively connected to the piston are included in the main housing portion, said fastener driving element is provided for driving fasteners which are successively feadable into a fastener driving track from a magazine assembly.
  • Portable fastener driving tools which use a fluid, particularly compressed air, for accelerating fasteners like staples, headed and headless nails, clamp nails and the like and for driving them into items, are well known.
  • Such fastener driving tools are used for example in the production of furniture for affixing overlays, for example leather covers, at furniture.
  • Such fastener driving tools have a piston which is movable in a cylinder between a top and an upper dead center.
  • a fastener driving element is arranged within the line of motion of the piston and is used for contacting and for ejection the fasteners which are fed into the fastener driving track from a magazine assembly.
  • Such fastener driving tools are known which are provided with a rubber tape around the metallic handle portion of the housing assembly.
  • the rubber tape has the function to make the handle portion more slip-proof and is provided on one side with an adhesive in order to fix it at the handle portion.
  • Such rubber tapes have to be wrapped in a helical manner around the handle portion. Because those rubber tapes are worn down after a short time of use it is necessary to replace the rubber tape by another rubber tape. Therefore the old rubber tape has to be removed together with its adhesive in a time consuming manner and the new rubber tape has to be wrapped round by round around the handle portion. Also if this is done very carefully the rubber tape often slips onto the handle portion during the use of the tool, which makes it necessary to replace it before it is worn down.
  • Another already known handle portion comprises a plastic part having a parting line which runs essentially parallel to the longitudinal direction of the handle portion and along the whole plastic part.
  • the gap of the shell-like plastic part can be minimized by means of at least two screws.
  • the plastic part should enclose the metallic handle portion of the housing assembly and a turning of the screws should lead to a surface-to-surface contact of the plastic part with the handle portion.
  • plastic parts are difficult to match with the housing assembly.
  • the plastic part can therefore often be moved at least slightly with respect to the housing assembly which makes it difficult to orientate the tool correctly with respect to the item in which a fastener should be driven. It has also been found that the gap can't be closed completely so that the operator can easily scratch himself at sharp edges of plastic part.
  • a fastener driving tool as initially mentioned and according to the invention comprises a lattice work of said handle portion which is surrounded by a grip which is designed as a flexural resistant circumferentially closed gap-free one piece plastic part.
  • a grip according to the invention is slid on the lattice work of the handle portion and encloses said lattice work by contacting it. Since the plastic grip is provided on the one hand with an own flexural resistance it is inherently stable which allows a simple assembling of the grip to the lattice work.
  • the flexibility of a lattice work and the flexibility of the plastic material of the preferably hollow-cylindrical grip allows a form-fit arrangement of the grip onto the lattice work and which allows to avoid the danger of the possibility of a relative movement between the grip and the lattice work.
  • the grip is designed as a hollow-cylindrical one piece plastic part which can easily assembled to the driving tool.
  • a design of the grip allows an easy form-fitting assembling by sliding it onto the lattice work from the free end of the handle portion.
  • a preferred embodiment of the invention in which the grip is detachable fastened to the housing assembly allows a fast exchange of the grip in case that grip is damaged during the use of the tool.
  • a locking piece can be arranged in the area of a free end of the handle portion, which secures the grip with respect to longitudinal position onto the lattice work by means of a form closure with the grip.
  • this connecting it can also be preferred that the grip is clamped on the handle portion between a shoulder of the housing assembly and the locking piece.
  • the grip is provided with a hollow-cylindrical shape which is open at its both endings.
  • One open end of the grip is used to push the grip onto the handle part of the housing assembly.
  • the other open end allows to insert the locking piece into the grip and to rest against the grip in order to clamp the grip onto the handle part.
  • Fig. 1 shows a portable pneumatically actuated fastener driving tool 1 having a housing assembly 2.
  • the housing assembly 2 has a main housing portion 3 and a handle part 4, to which a hollow magazine assembly 5 for receiving a supply of fastener is connected.
  • the handle part 4 and the magazine 5 assembly are aligned essentially parallel to each other, whereby the main housing portion 3 is orientated essentially perpendicular with respect to the handle part 4.
  • the handle part 4 contains a connection 6 for an air supply.
  • the handle part 4 is provided with a kind of lattice work 10 which is build by the metallic housing in order to provide the handle part 4 with a good torsional and bending strength ( Fig. 2 ).
  • a hollow one piece plastic part 11 which is build us an adapting sleeve and is slid onto an over the lattice work 10 of the handle part 4.
  • the lattice work 10 has an outer shape particularly with an extension 10a which is provided with edges, which allows with respect to the radial position of the hollow plastic part 11 a form-locking arrangement onto the the lattice work 10.
  • the tub-shaped plastic part 11 can be manufactured as an injection molding part out of an appropriate plastic material, for example TPE (thermoplastic elastomer), PUR (polyurethane) or EPDM (ethylene propylene diene M-class rubber).
  • TPE thermoplastic elastomer
  • PUR polyurethane
  • EPDM ethylene propylene diene M-class rubber
  • Such materials are particularly in the form of a hollow-cylindrical gap-free part with respect to its mechanical stability strength as plastic although it is soft as rubber with respect to its ability to adapt its shape in a certain amount to the shape of handle part of the metallic housing.
  • the plastic part 11 should fit on the handle part 4 of the metallic housing preferably without clearance and can be fastened to the handle part with only one screw. As shown in Fig.
  • the metallic housing can be provided with a shoulder 12 resp. border, which in circumferential direction of the handle part at least partly surrounds the handle part 4.
  • the plastic part 11 can rest with its front side against said shoulder 12 in order to allow a predefined position of the plastic part 11 onto the handle part.
  • a locking piece 13 is partly inserted into the free end of the handle part 4 and of the plastic part 11.
  • the locking piece 13 is also provided with a shoulder 14 and rests with said shoulder 14 against the handle part 4 and plastic part 11.
  • the plastic part 11 is therefore clamped between these two shoulders 12, 14.
  • the locking piece 13 is provided with a lug 15 which is used to fasten the magazine assembly 5 at the housing.
  • a manually actuatable trigger assembly 20 is arranged in an intersection part between the handle part 4 and the main housing portion 3.
  • the trigger assembly 20 can be actuated by a user of the tool by means of a trigger 21.
  • a trigger valve 22 acts as a barrier between a pressure reservoir 25 for compressed air ( Fig. 1 ), and a main valve 26 of the tool.
  • the pressure reservoir 25 can be connected by means of a hose (not shown in the drawings) to an external supply of compressed air.
  • a trigger assembly 20 connects the pressure reservoir 25 with a supply channel 28 which ends in a lower area of the main valve 26.
  • the pressure reservoir is also connected via a connecting channel 27 with the main valve 26.
  • the connecting channel leads to an upper area of the main valve which is sealed against the lower area.
  • An assembly group of a means for single fire control and of a means for automatic frequency fire control 40 (hereinafter called "SFCAFC”) is arranged in flow direction of the compressed air behind the trigger assembly 20.
  • the assembly group is arranged in the handle part 4 of the housing assembly in a through hole 41 and is provided with a single fire control means 42, a frequency control means 43 and a valve 44, which are inserted at the same side of the housing ( Fig. 5 ).
  • a throttle valve 45 of the SFCAF is inserted in the housing.
  • the actuatably single fire control means 42 has the function to allow a limitation of the amounts of shots of fasteners by actuating the trigger to only one shot.
  • the frequency control means 43 has the function to allow an adjustment of the frequency in a certain range of frequencies with which a plurality of fasteners are successively shoot out of the tool in case that the single fire control is not actuated.
  • a typical adjustable range of frequencies are from 0 to 1800 fasteners per minute.
  • the frequency control means 43 is switched off.
  • the frequency of the fasteners which are shoot out of the tool can be adjusted by revolving the frequency control means 43 at the knurl 46, which is a one-piece part of the frequency control means.
  • the throttle valve 45 is inserted at the other side of the housing where the single fire control 42 means, the frequency control means 43 and the valve 44 have been arranged before. Furthermore the single fire control means 42, the frequency control means 43 and the valve 44 are inserted at the opposite side of the housing where the throttle valve 45 has been arranged before. As soon as the parts of the SFCAFC are interchanged and connected to each other in the subsequent described manner the SFCAFC is ready for use.
  • the throttle valve 45 is provided with a conical plug 50 which interacts with an also conical valve seat 51 of the frequency control means 43.
  • the frequency control means 43 is provided at one of its ends with an outer thread which can be screwed into an inner thread of the valve 44, whereby the valve 44 can be screwed with its outer thread into an inner thread of the throttle valve 45.
  • the inner thread of the throttle valve 45 is situated at the inner surface of a hollow cylindrical part of the throttle valve 45 which surrounds the plug 50 with distance.
  • the wall of the hollow cylindrical part of the throttle valve is provided with openings 52 through which air can flow in direction to the supply channel 28 via the trigger assembly 20.
  • the pin-shaped single fire control means 42 is coaxially inserted into the hollow cylindrical frequency control means 43.
  • the single fire control means 42 can be displaced in the frequency control means in longitudinal direction between two end positions. In one of these two end positions the front end of the single fire control closes openings 53 in the wall of the frequency control means 43 so that the passageway of the frequency control means is closed for air coming through openings 52 of the throttle valve and through the supply channel 28.
  • This position of the single fire control means is shown in Fig. 7 , whereby the flow direction of the air is illustrated by dotted lines 57. This is the position in which the single fire control is switched on.
  • the other possible end-position of the single fire control means 42 is shown in Fig. 8 . towards the throttle valve 45 and its restriction. In its other position the single fire control means is partly retreated in the frequency control means so that the passageway of the frequency control means is free for air which flows from the openings 54, 53 through the wall of the frequency control means 43 towards the throttle valve 45 and its restriction and openings 52.
  • a cage 60 which is part of the main valve 26 can be moved between an upper and a lower position.
  • the cage 60 is shown in its lower position.
  • the cage 60 is arranged in flow-direction behind the throttle valve 45 of the SFCAFC and at the end of the supply channel 28.
  • the cage 60 is also arranged at the end of the connecting channel 27.
  • the cage closes openings 65 which acts as passageways and connects the connecting channel 27 with the power adjustment unit 61, whereby in its lower position the cage opens the openings 65 for a flow-through.
  • the cage 60 surrounds the upper part of a cylinder 62 which contains a piston 63 and surrounds also the lower part of a valve seating 64 of the main valve.
  • the cage 60 If the trigger 21 is not activated the cage 60 is loaded with the hose pressure at its lower front side, the cage is held in its upper position ( Fig. 1 and 10 ). In said upper position the cage seals openings 65 which lead to the power adjustment unit 61. By actuating the trigger 21 the air pressure under the cage is taken away and the cage 60 is moving down in direction towards its lower position, which is shown in Fig. 9 and 11 .
  • the throttle valve 70 which is part of the power adjustment unit 61 is shown in Fig. 10 - 12 .
  • the valve 70 includes a screw 72 which is screwed in a hollow cylindrical part 76 which is provided with a inner thread and which is fixed at main housing portion 3 of the housing assembly.
  • the screw 72 can be moved up or down by revolving an actuating part 71 in one of the two rotating directions.
  • the screw 72 acts as a stop for the valve body 74.
  • a helical spring 73 is arranged between the actuating part 71 and the valve body 74 of the throttle valve 70. The force of the spring 73 presses the valve body 74 with its cone-end onto the valve seating 64.
  • the screw 72 As deeper the screw 72 is screwed into the main housing as shorter is the length of the maximum lifting movement of the valve body. In order to get a high resolution of the adjustable position of the the screw 72, the screw 72 is provided with a relatively low pitch and it can be adjusted over several revolutions.
  • the valve body 74 is provided with an outer inclined peripherally surface 75. A normal of said surface has a component parallel to the direction of the spring force.
  • the air pressure acting against said surface 75 leads therefore to a lifting of the valve body 74 from the valve seating 64 in case that the air pressure is high enough. This lifting movement proceeds until the valve body 74 reaches the screw and gets into contact with the screw 72 which stops the movement of the valve body 74.
  • By means of the possibility to adjust via the position of the screw 72 it is possible to vary for each cycle the maximum restriction of the throttle valve and therefore the possible discharge flow-through which can reach in flow-direction the piston and affects pressure onto a surface of the piston.
  • the pressure in the piston chamber accelerates than the piston 63 downwards in its cylinder 62 from its top dead center ( Fig.
  • the air can leave the cylinder 62 through an orifice 78 in the wall of the cylinder 62 near the position of the piston bottom dead center, as indicated by a dotted arrow 79.
  • the air flows from there into a return chamber 80, which is arranged as a hollow cylinder around the cylinder 62 of the piston 63. This enables to vent the piston chamber of the cylinder 62.
  • the lower pressure in the piston chamber supports to fastening the movement of the piston back at its return stroke to its top dead center. Additionally the return chamber acts as a pressure chamber for the return stroke.
  • the high pressure air flows from the return chamber 80 with direction to the frequency control means 43.
  • the frequency control means 43 Before the air reaches the frequency control means 43 it has to flow through the restriction of the throttle valve 45 of SFCAF.
  • the time it takes for the air to flow through the restriction and to fill the chamber of the frequency control means 43 depends from the size of the restriction.
  • the size of the restriction is adjustable by revolving the throttle valve 45, which therefore influences the frequency with which the tool 1 ejects fasteners.
  • Behind the frequency control means the air flows into the trigger valve 22.
  • the automatic cage moves to its upper position. Because in Fig. 8 the SFCAFC is assembled for right handed persons and in Fig. 13 the SCAFC is assembled for left handed persons in these two illustrations are shown two different flow directions of the air as a result of the two different assembly possibilities.
  • the air flows through the trigger valve under a cage 85 of the trigger valve 22 and moves it to its upper position ( Fig. 14 ). Also the piston 63 returns to its upper position. When the piston is at its upper position the pressure in the return chamber 80 flows out. When the piston 63 leaves the bottom the air can flow out through a guide of the fastener driving element 77. The pressure can therefore be lowered in two ways, namely leaving through the guide of the fastener driving element 77 and by expanding when it pushes the piston upwards. When the return pressure is gone, the (automatic) cage 60 moves to its lowest position, because at the same time the trigger valve 20 closes supply channel 28 which takes the pressure from the lower side of the cage 60.
  • the initial situation is the same as shown in Fig. 9 .
  • the singe fire control means 42 has to be activated which means that the single fire control means 42 has to be pushed inside the bushing of frequency control means 43 - as shown in Fig. 7 - which closes the passage way from the return chamber 80 to the cage 85. Therefore the air which comes from the return chamber 80 remains in the frequency control means 43. No air can lift the automatic cage 85.
  • the trigger 21 has to be deactivated and than the trigger 21 has to be activated again.
  • a tubular muffler means 90 is arranged in the handle part 4 of the tool 1.
  • the muffler means 90 has two parts, a tubular passage way pipe 91 and a tubular muffler pipe 92.
  • the passage way pipe 91 and the muffler pipe 92 are preferably connected to each other as one piece part.
  • the muffler pipe 92 is provided in its ring-shaped wall 93 with a plurality of geometrically predefined recesses 94.
  • the recesses 94 are equally allocated at the muffler pipe.
  • the recesses 94 have a circular cross-sectional form, whereby the diameter of the recesses should be as big as possible.
  • the size of the recesses is limited by the circumstance that too large recesses do not reduce the noise anymore.
  • the diameters of the recesses can have a value out of a range from 1 mm to 4 mm.
  • the recesses have a diameter of 1,8mm. In case that non-circular recesses are used the largest aperture of those non-circular openings can also be out of this range of values.
  • the front wall of the tubular muffler pipe is closed.
  • the muffler pipe 92 is arranged in a tubular hole 95 of the locking piece 13.
  • the muffler means 90 is provided at its outer peripheral surface with a plurality of ring-shaped extensions 96, with which the muffler means 90 rests again the inner surface of the tubular hole 95 of the locking piece.
  • a sealing can be arranged, for example an o-ring.
  • the outer peripheral surface of the muffler pipe 92 is arranged with clearance to the inner peripheral surface of the hole 95.
  • the compressed air, which enter with high energy, particularly in form of a high velocity, the muffler means 90 flows through the passage way pipe 91 and will be therefore guided to the free end of the handle part 4.
  • the compressed air strikes against the closed front wall 97 of the muffler pipe 92.
  • the compressed air has therefore the tendency to be retained within the muffler pipe 92, which means the air looses velocity.
  • the air can exit the muffler pipe through the plurality of recesses 94 in the wall of the muffler pipe as a result of a deflection of its flow direction.
  • the air which is now located in the hollow cylindrical area between the outer surface of the muffler pipe 92 and the surface of the hole 95 can leave the handle part through the open end of the hole 95.
EP08015757A 2008-09-07 2008-09-07 Outil entraînant une attache disposant d'une poignée Withdrawn EP2161106A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP08015757A EP2161106A1 (fr) 2008-09-07 2008-09-07 Outil entraînant une attache disposant d'une poignée

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP08015757A EP2161106A1 (fr) 2008-09-07 2008-09-07 Outil entraînant une attache disposant d'une poignée

Publications (1)

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EP2161106A1 true EP2161106A1 (fr) 2010-03-10

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EP08015757A Withdrawn EP2161106A1 (fr) 2008-09-07 2008-09-07 Outil entraînant une attache disposant d'une poignée

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EP (1) EP2161106A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD873106S1 (en) 2017-05-03 2020-01-21 Signode Industrial Group Llc Staple driving tool

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3278104A (en) * 1965-09-14 1966-10-11 Senco Products Fastener applying device
EP0164324A2 (fr) * 1984-05-07 1985-12-11 Atlas Copco Aktiebolag Poignée anti-vibrations
GB2169541A (en) * 1985-01-12 1986-07-16 Victor Hymanson Hand grips
EP0207034A1 (fr) * 1985-06-19 1986-12-30 Eskil Sundström Poignée absorbant les vibrations
GB2185209A (en) * 1985-12-30 1987-07-15 John Kelly Fox A tool handle provided with a resilient sleeve grip
DE9419182U1 (de) * 1994-11-30 1995-01-26 Irmer & Elze Maschinenfabrik G Druckluftwerkzeug
US5839517A (en) * 1993-01-27 1998-11-24 Lord Corporation Vibration isolator for hand-held vibrating devices
US5881822A (en) * 1996-01-11 1999-03-16 Chicago Pneumatic Tool Company Pneumatic tool and vibration isolator therefor
US6039231A (en) * 1994-05-18 2000-03-21 Stanley Fastening Systems, L.P. Adjustable energy control valve for a fastener driving device
US6155354A (en) * 1998-04-20 2000-12-05 Snap-On Tools Company Interchangeable grips for power hand tools
WO2002078912A1 (fr) * 2001-03-29 2002-10-10 Snap-On Technologies, Inc. Outil pneumatique allonge a poignee molle interchangeable
US20030229970A1 (en) * 2002-06-18 2003-12-18 Chen Li Chen Shock-absorbing protective cover for pneumatic tool handle
WO2005082581A1 (fr) * 2004-02-04 2005-09-09 Trostel Specialty Elastomers Group, Inc. Appareil separable d'amortissement des vibrations et procede associe

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3278104A (en) * 1965-09-14 1966-10-11 Senco Products Fastener applying device
EP0164324A2 (fr) * 1984-05-07 1985-12-11 Atlas Copco Aktiebolag Poignée anti-vibrations
GB2169541A (en) * 1985-01-12 1986-07-16 Victor Hymanson Hand grips
EP0207034A1 (fr) * 1985-06-19 1986-12-30 Eskil Sundström Poignée absorbant les vibrations
GB2185209A (en) * 1985-12-30 1987-07-15 John Kelly Fox A tool handle provided with a resilient sleeve grip
US5839517A (en) * 1993-01-27 1998-11-24 Lord Corporation Vibration isolator for hand-held vibrating devices
US6039231A (en) * 1994-05-18 2000-03-21 Stanley Fastening Systems, L.P. Adjustable energy control valve for a fastener driving device
DE9419182U1 (de) * 1994-11-30 1995-01-26 Irmer & Elze Maschinenfabrik G Druckluftwerkzeug
US5881822A (en) * 1996-01-11 1999-03-16 Chicago Pneumatic Tool Company Pneumatic tool and vibration isolator therefor
US6155354A (en) * 1998-04-20 2000-12-05 Snap-On Tools Company Interchangeable grips for power hand tools
WO2002078912A1 (fr) * 2001-03-29 2002-10-10 Snap-On Technologies, Inc. Outil pneumatique allonge a poignee molle interchangeable
US20030229970A1 (en) * 2002-06-18 2003-12-18 Chen Li Chen Shock-absorbing protective cover for pneumatic tool handle
WO2005082581A1 (fr) * 2004-02-04 2005-09-09 Trostel Specialty Elastomers Group, Inc. Appareil separable d'amortissement des vibrations et procede associe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USD873106S1 (en) 2017-05-03 2020-01-21 Signode Industrial Group Llc Staple driving tool

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