EP3403787B1 - Agrafeuse destinée à enfoncer des moyens de fixation dans des pièces - Google Patents

Agrafeuse destinée à enfoncer des moyens de fixation dans des pièces Download PDF

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Publication number
EP3403787B1
EP3403787B1 EP17171988.3A EP17171988A EP3403787B1 EP 3403787 B1 EP3403787 B1 EP 3403787B1 EP 17171988 A EP17171988 A EP 17171988A EP 3403787 B1 EP3403787 B1 EP 3403787B1
Authority
EP
European Patent Office
Prior art keywords
piston
holding
driving
magnetic coupling
pressing cylinder
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.)
Active
Application number
EP17171988.3A
Other languages
German (de)
English (en)
Other versions
EP3403787A1 (fr
Inventor
Joachin Bauer
Konrad Kahler
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.)
Joh Friedrich Behrens AG
Original Assignee
Joh Friedrich Behrens AG
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 Joh Friedrich Behrens AG filed Critical Joh Friedrich Behrens AG
Priority to EP17171988.3A priority Critical patent/EP3403787B1/fr
Priority to RU2018117425A priority patent/RU2714148C2/ru
Priority to AU2018203410A priority patent/AU2018203410B2/en
Priority to US15/982,149 priority patent/US10661470B2/en
Publication of EP3403787A1 publication Critical patent/EP3403787A1/fr
Application granted granted Critical
Publication of EP3403787B1 publication Critical patent/EP3403787B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27F—DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
    • B27F7/00—Nailing or stapling; Nailed or stapled work
    • B27F7/02—Nailing machines
    • B27F7/05—Driving means
    • B27F7/09—Driving means operated by fluid pressure
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27F—DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
    • B27F7/00—Nailing or stapling; Nailed or stapled work
    • B27F7/02—Nailing machines
    • B27F7/13—Nail feeding 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
    • B25C1/04—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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27F—DOVETAILED WORK; TENONS; SLOTTING MACHINES FOR WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES
    • B27F7/00—Nailing or stapling; Nailed or stapled work
    • B27F7/003—Nailing or stapling machines provided with assembling means

Definitions

  • the invention relates to a tacker for driving fasteners into workpieces according to the preamble of claim 1.
  • a tacker is for example from the US 3,524,577 A out.
  • Drive-in devices of the type according to the invention are used for driving fasteners with a certain depth of penetration into workpieces. This is required, for example, when attaching plasterboard or gypsum fiber boards to wooden building components.
  • the nail heads must not penetrate too deeply into the outer layer of cardboard and destroy it.
  • the driving of nails with a given depth of penetration can also be desirable for aesthetic reasons, for example when planking the outside of wooden parts with wooden boards.
  • Eintreibella be used, which drive the nails slowly into the workpiece. The drive takes place by means of compressed air. To catch the high driving forces, the tacking devices are arranged on holding devices.
  • the DE 20 2009 017 659 U1 describes a drive-in module for driving in particular magazine-mounted fasteners, in particular of magazines nails, in workpieces.
  • the drive-in module has an assembly carrier for a drive-in unit, wherein the drive-in unit has a drive drive, which acts via a drive-in direction of sliding driver punch with a drive-in force on the respective fastener to be driven.
  • the drive unit as such is by means of a Andschreibantriebs to the respective Workpiece pressed and this guided slidably via an aggregate guide on the subframe in the driving direction.
  • the Andschreibantrieb has a extending in a wedge plane drive wedge, which acts to press the Eintreibaggregates to the respective workpiece on the drive-in unit.
  • the drive-in unit is pressed against the workpiece in order to achieve a constant Eintechnikiefe.
  • the drive wedge is not arranged centrally to the drive-in unit, but laterally offset from the drive plane of the drive-in unit.
  • the well-known drive module is still bulky and structurally complex. In particular, it requires an additional pneumatic piston drive for the pressure drive.
  • the pressing of the Eintreibaggregates to the workpiece by means of the Andrückantriebes and subsequent driving the fastener by means of the drive-in unit requires appropriate control. The operation is energy-intensive, since the entire drive-in unit is displaced for pressing.
  • the invention is based on the object to provide a structurally and structurally less expensive tacker for driving fasteners with a certain depth of penetration into workpieces with reduced energy requirements.
  • the tacker according to the invention is ensured by placing the muzzle tool with the lower end of the workpiece and driving the fastener until the effectiveness of the first stop means that the fastener is driven with a certain depth of penetration into a workpiece.
  • the lowering and placement of the necking tool is effected on the workpiece by displacing the piston down.
  • the drive tappet moves concurrently with the muzzle tool with down.
  • the fastener is driven into the workpiece in a certain Einologyiefe by further moving the piston down.
  • driving the fastener is displaced by moving the piston up the drive tappet up and the pressure cylinder in the upper Andruckzylinder too.
  • the master cylinder with the displaceable therein piston thus causes both the placement of the Antikzylinders on and lifting the An fürzylinders from the workpiece as well as the displacement of the driving ram for driving fasteners.
  • An additional wedge gear and another pneumatic drive for moving the tacker are not required.
  • the construction can be simplified, reduces the volume of construction and energy for the operation of the Eintreibuzes be saved.
  • the construction of the successive pressing of the muzzle tool and driving the fastener is secured, so that no special control is required for this.
  • the downward displacement of the piston in the master cylinder is effected by introducing pressurized air through the first air inlet into the first air chamber, preferably deaerating the second air chamber.
  • the displacement of the piston in the master cylinder upwards is effected by introducing compressed air through the second air inlet into the second air chamber, wherein preferably the first air chamber is vented.
  • the piston In the upper piston position, the piston can be held by compressed air in the second air chamber.
  • compressed air is preferably used from an operational compressed air network. In many cases, the operating pressure in such compressed air networks is 6 bar.
  • the first holder device comprises a first projection projecting radially outward from the piston rod and a second projection projecting radially inwardly from the pressure cylinder, wherein the first projection is arranged below the second projection, such that in the upper piston position the first projection abuts the underside of the second projection and away from the second projection is displaced downwards, when the muzzle tool touches on the workpiece.
  • in the upper piston position is held by the abutment of the first projection on the underside of the second projection of the pressure cylinder in the upper An horrzylinder ein.
  • the first projection is displaced downwards so that the second projection resting against it is also lowered with the pressure cylinder.
  • the lowering can be effected by the weight of the Andruckzylinders.
  • the piston can be moved further down, since the first projection is not prevented by the second projection from moving further down.
  • the first projection takes with it the second projection and thus displaces the pressure cylinder back into the upper pressure cylinder position.
  • the first projection and / or the second projection is a projection which extends completely or partially around the piston axis.
  • the first projection and / or the second projection is an annular and / or annular disk-shaped projection.
  • the first projection is arranged at the bottom on a hollow cylindrical outer piston rod, which is sealingly passed through the through hole, the lower edge of the outer piston rod is the first stop element, the driving ram is connected to an inner piston rod arranged concentrically in the outer piston rod and is a compression spring in the annular space between the outer piston rod and inner piston rod and arranged in pressure cylinder and is supported with the upper end on the underside of the main piston and with the lower end at the top of the second stop element.
  • the compression spring is a helical spring.
  • the compression spring is compressed when driving the fastener.
  • the energy stored in the compression spring is used.
  • compressed air is needed to move the piston up to the upper piston position.
  • the drive ram is first withdrawn in the drive-in channel and then the pressure cylinder is raised. In the following embodiment is from the beginning of the displacement of the piston upwards at the same time the drive tappet and the pressure cylinder raised, thereby saving time and more fasteners per unit time can be driven.
  • a second holding device which has a third holding element connected to the piston rod and a fourth holding element connected to the pressure cylinder, which are designed so that they hold the piston rod on the pressure cylinder on contact of the first stop element on the second stop element, so by Move the piston up the pressure cylinder is displaced upward.
  • a third holding device is present, which has a fifth holding element on the master cylinder and a sixth holding element on the pressure cylinder, which are designed so that they can be connected to each other by displacing the An horrzylinders up, whereby further displacement of the piston upwards further displacement of the Pressure cylinder prevents upward and the connection between the third and fourth retaining elements of the second holding device is canceled.
  • a lifting device which is designed so that it picks up the connection between the fifth and the sixth holding element upon impact of the first holding element on the second holding element.
  • the drive-in ram is displaced upward after driving in displacing the piston upward and immediately displaced by the pressure cylinder on the piston rod holding second holding device of the pressure cylinder upwards. Only by the effectiveness of the third holding device of the pressure cylinder is held in the position then reached and repealed the further displacement of the piston up the effect of the second holding device. By the effectiveness of the third holding means of the pressure cylinder does not fall down when the piston is no longer connected to the pressure cylinder by canceling the action of the second holding means.
  • the second holding device is a first magnetic coupling, wherein a first magnetic coupling element with the piston rod and a second magnetic coupling element is connected to the pressure cylinder.
  • the first magnetic coupling element is the first stop element and the second magnetic coupling element is the second stop element.
  • the first magnetic coupling element is circular disk-shaped and / or the second magnetic coupling element is circular disk-shaped.
  • the first magnetic coupling element has at least one (permanent) magnet and the second magnetic coupling element at least one ferromagnetic element or vice versa.
  • the third holding device comprises a second magnetic coupling, wherein a third magnetic coupling element with the master cylinder and a fourth magnetic coupling element is connected to the pressure cylinder.
  • the third holding device comprises a second stop device with a third stop element on the master cylinder and a fourth stop element on the pressure cylinder, which are designed so that they prevent a further displacement of the pressure cylinder upwards in the meeting.
  • the third magnetic coupling element is annular disk-shaped and / or the fourth magnetic coupling element is annular disk-shaped.
  • the third magnetic coupling element comprises at least one (permanent) magnet and / or the fourth magnetic element comprises at least one ferromagnetic component or vice versa.
  • the third stop element the underside of the sealing element and the fourth stop element a at the upper end of the pressure cylinder radially inwardly projecting, annular disk-shaped stop element. This is at the same time the fourth magnetic coupling element according to another embodiment.
  • the lifting device vertically from the top of the second holding element protruding pins and the second holding element in the vertical direction until it rests on the sixth holding element displaceable, wherein the pins are displaced with their upper ends on the sixth holding elements also up to to push off the fifth holding element from the sixth holding element.
  • the third magnetic coupling element is held on a vertical guide device which is formed so that the third magnetic coupling element is vertically displaceable upward starting from a lower stop position, wherein the third magnetic coupling element in the lower stop position with the fourth magnetic coupling element can be coupled and from Pin is abd Wegbar away from the fourth magnetic coupling element upwards.
  • the fourth magnetic coupling element with the third magnetic coupling element can be coupled.
  • the pressure cylinder is then held in the position reached, so that it does not fall down when releasing the second holding device.
  • the second magnetic coupling is disengaged by means of the pins when the first stop member meets the second stop member.
  • the second holding device comprises at least one groove in a lower portion of the driving ram and at least one locking element on the necking tool, which engages upon engagement of the first stopper element on the second stop element in the groove and is formed so that the latching triggers when the fifth and the sixth retaining element are interconnected.
  • the piston is connected via the latching between the driving ram and locking element with the pressure cylinder.
  • the first magnetic coupling is eliminated.
  • the third holding device is designed as a second magnetic coupling.
  • a nail centering is present, which has a centering opening below the drive-in channel which is delimited by at least one guide element which is movable in the radial direction and is biased by a spring device in the radial direction towards the centering channel, wherein the guide element at the same time Locking element of the third holding device is.
  • a nail centering for the realization of the second holding device is used.
  • the nail centering comprises a centering housing, in which at least one ring of balls is arranged, between which the centering is defined, outside of the balls, an elastic snap ring, Seeger ring, O-ring or other elastic ring acts as a spring device.
  • This nail centering is suitable for centering nails with a single nail shank and a nail head or pins.
  • the balls When passing the nail shank through the centering the balls are pressed against the action of the elastic ring radially slightly, so that the nail shaft is centered.
  • the balls are pushed further apart, and after the nail head has passed, they are pressed by the elastic ring against the subsequent drive tappet. Finally, the balls snap into the groove of the drive ram.
  • the underside of the centering housing is the lower end of the muzzle tool with which the pressure cylinder is placed on the workpiece.
  • the underside of the centering housing is annular.
  • the second stop element is held by an adjusting device in the pressure cylinder, wherein the adjusting device is designed to adjust the vertical position of the second stop element in the pressure cylinder.
  • the penetration depth of the fastening means in the workpiece is adjustable.
  • the second stop element is a ring with an external thread, which is screwed into an internal thread of an adjusting ring, wherein the adjusting ring is held between a first and a second bearing element in the pressure cylinder, so that it rotatable in the pressure cylinder, but not displaced in the vertical direction is present, and a linear guide is present, which allows a displacement of the ring in the vertical direction, but prevents it from rotating about a vertical axis.
  • a precise adjustment of the penetration depth is particularly easy.
  • the adjusting ring on its outer circumference at different circumferential positions on first blind holes, in the through at least one slot in the pressure cylinder from the outside a pin-shaped tool can be used.
  • the adjusting ring By turning a tool inserted in a first blind bore, the adjusting ring is adjustable. After exhaustion of the pivoting range in the slot, the tool can be plugged into a further first blind hole to turn the adjusting ring, if necessary.
  • top and bottom and derived therefrom such as “above” and “below” and “vertically” and “horizontally” refer to an alignment of the tacker with the master cylinder the pressure cylinder and the lower opening of the muzzle tool at the lower end of the tacker.
  • a tacker 1 is arranged on a bridge 2 above a workpiece 3. From the bridge 2, only a horizontal support is shown. Overall, the bridge is portal-shaped, wherein the two vertical posts are guided on rails on both sides of a work table in the horizontal direction displaced.
  • the tacker 1 comprises a master cylinder 4 in a housing 5, a pressure cylinder 6 arranged below the housing 5, a necking tool 7 projecting downwards from the underside of the pressure cylinder 6, and a magazine 8 arranged laterally of the necking tool.
  • the master cylinder 4 is formed inside circular cylindrical or oval. Above the master cylinder 4 is closed by a cover 9. In a central, hexagonal recess 10 in the underside of the lid 9, the hexagonal head of a first screw 11, whose threaded shaft is passed through a central bore of the lid 9 and projects above the lid 9 sits. The first screw 11 is used for attachment to the bridge. 2
  • a piston 12 is vertically displaceable.
  • the piston is sealed via first and second O-rings 13, 14 relative to the master cylinder 4.
  • the piston rod 15 is connected to the piston 12 by means of a second screw 16.
  • the master cylinder 4 has a sealing element 17, which is designed as a first bottom plate.
  • the sealing member 17 has a first in the center Through hole 18 in the form of a guide bush, through which the piston rod 15 is passed, so that it protrudes down from the sealing member 17.
  • a third O-ring is held in a groove, which seals this relative to the master cylinder 4.
  • the piston rod 15 is sealed off from the sealing element 17 by a fourth O-ring held in the sealing element 17.
  • a first air chamber 20 and below the piston 12 a second air chamber 21 is present.
  • the first air chamber 20 is connected to a first accessible from the outside air inlet 22 and the second chamber with an externally accessible second air inlet 23.
  • the pressure cylinder 6 is outside substantially box-shaped and has inside a circular or oval cross-section. At the bottom, the pressure cylinder 6 has a second bottom plate 24 with a second through-hole 25. Above the pressure cylinder 6 has an outwardly projecting flange 6.1.
  • the mouth tool 7 is fixed to the underside of the second bottom plate 24. It has a drive-in channel 26 which has an upper opening 27 at the top, a lower opening 28 at the lower end of the necking tool 7 and a lateral opening 29 at the side. To the side opening 29, the drum-shaped magazine 8 is connected for fastening means with its discharge opening.
  • a driving ram 30 protrudes with a lower portion through the second through hole 25 and the upper opening 27 into the driving channel 26.
  • the upper portion of the driving ram 30 is fixed to the bottom of the piston rod 15.
  • a first holding device 32 has a first holding element 33 projecting radially from the piston rod 15. This is a circular disk-shaped projection surrounding the central axis of the piston rod.
  • the first holding element 33 has a cup-shaped formation 34 in the center, in which the lower end of the piston rod 15 is inserted.
  • the driving ram 30 is passed through a central hole of the molding and screwed into the piston rod.
  • a collar 35 on the outer periphery of the driving ram 30 abuts against the underside of the molding 34, so that the first holding element 33 is fixed between the piston rod 15 and the driving ram 30.
  • the first holding device 32 has a second holding element 36 connected to the pressure cylinder 6.
  • the second holding element 36 is a protrusion projecting radially inwards from the pressure cylinder 6. This is designed as a circular disk, which is arranged vertically displaceable in a first extension 37 at the upper end of the pressure cylinder 6.
  • a first stop device 38 has a first stop element 39 connected to the piston rod and a second stop element 40 connected to the pressure cylinder 6.
  • the first holding element 33 is at the same time the first stop element 39.
  • the second stop element 40 is a ring which is held by an adjusting device 41 in the vicinity of the second bottom plate 24.
  • the adjusting device 41 comprises an adjusting ring 42, which has an internal thread 43 into which the second stop element 40 is screwed with an external thread 44. In the region of the external thread 44, the second stop element 40 has a reduced outer diameter.
  • the second stop element 40 has on the underside a plurality of vertical threaded bores 48 into which stud bolts 49 are screwed, which are guided axially displaceably in second bores 24. 1 of the second bottom plate 24.
  • the second bores 24. 1 of the second bottom plate 24 and the stud bolts 49 form a linear guide 50.
  • the second stop member 40 is displaced in the vertical direction, since it is prevented by the stud bolts 49 from turning with the adjusting ring 42.
  • a second holding device 51 which has a third holding element 52 connected to the piston rod 15 and a fourth holding element 53 connected to the pressure cylinder 6.
  • the second holding device 51 is a first magnetic coupling 54 which has a first magnetic coupling element 55 connected to the piston rod 15 and a second magnetic coupling element 56 connected to the pressure cylinder 6.
  • the first magnetic coupling element 55 has permanent magnets 57, which are fastened by means of third screws 58 and first nuts 59 on the underside of the first stop element 39.
  • the second magnetic coupling element 56 is the second stop element 40, which consists of a ferromagnetic material.
  • a third holding device 60 which has a fifth holding element 61 on the master cylinder 4 and a sixth holding element 62 on the pressure cylinder 6.
  • the third holding device 60 comprises a second magnetic coupling 63 which has a third magnetic coupling element 64 connected to the master cylinder 4 and a fourth magnetic coupling element 65 connected to the pressure cylinder 6.
  • the third magnetic coupling element 64 has circular disc-shaped permanent magnets 66 which are fastened by means of fourth screws 67 at the lower ends of first rods 68, which are guided in vertical first bores 69 of the housing 5.
  • first plates 71 are fixed by means of fifth screws 70, which project radially outwardly with respect to the rods 68.
  • the first disks 71 are arranged in second extensions 72 of the first bores 69 and limit the displacement of the first rods 68 down by abutment with a shoulder at the lower end of the second extensions 72.
  • the displacement of the first rods 68 upwards is limited by abutment of the radial with respect to the first rods 68 projecting permanent magnets 66 at the bottom of the housing 5.
  • the fourth magnetic coupling element 65 is formed as an annular disc made of a ferromagnetic material which is attached to the upper end of the pressure cylinder 6.
  • the third holding device 60 comprises a second stop device 73 which has a third stop element 74 on the master cylinder 4 and a fourth stop element 75 on the pressure cylinder 6.
  • the fourth stopper member 75 is a radially inwardly projecting part of the fourth magnetic coupling member 65, and the third stopper member 74 is the lower side of the sealing member 17.
  • the fourth magnetic coupling element 65 limited by contact with the underside of the sealing member 17, the displacement of the pressure cylinder 6 upwards. Further it covers the first extension 37 of the pressure cylinder 6 from above and limits the displacement of the second holding member 36 upwards. Downward, the displacement of the second holding element 36 is limited by the bottom of the first extension 37.
  • a lifting device 76 with vertically aligned pins 77 is present.
  • the pins 77 project upwardly from the top of the second support member 36.
  • the pins 77 engage in holes 78 of the fourth magnetic coupling element 65.
  • the pins 77 do not project beyond the upper surface of the fourth magnetic coupling member 65 (FIG. Fig. 3 ).
  • the pins 77 are pushed out of the holes 78 at the top ( Fig. 2 ).
  • the flange 6.1 of the pressure cylinder 6 is attached by means of sixth screws 79 to second rods 80, which are guided in vertical third bores 81 in the housing 5.
  • a holder 8.1 of the magazine 8 is clamped between a sixth screw 79 and the flange 6.1.
  • Fig. 1 and 2 show the first tacker 1 in a starting position in which the necking tool 7 is not seated on the workpiece 3.
  • the piston 12 is held by fed into the second air chamber 21 compressed air in the upper piston position in which it rests on the cover 9.
  • the first holding element 33 is maximally raised by the piston rod 15, so that the second holding element 36 bears against the underside of the sixth holding element 62.
  • the third magnetic coupling member 64 is pushed by the pins 74 from the fourth magnetic coupling member 65.
  • Fig. 3 is displaced by feeding compressed air into the first air chamber 20 and venting the second air chamber 21 of the piston 12 and thus the first holding member 33 downward.
  • the second holding element 36 and thus the pressure cylinder 6 moves downwards until the necking tool 7 is seated with the lower end on the workpiece 3.
  • a defined starting position for the driving in of a nail 82 or another fastening means into the workpiece 3 is given.
  • Fig. 4 After that, further compressed air is introduced into the first air chamber 20 and a nail 82 fed from the magazine 8 into the driving channel 26 is driven into the workpiece 3 until the first stop element 39 bears against the second stop element 40. Then the nail 82 is driven into the workpiece 3 in a defined drive-in depth.
  • the penetration depth is determined by the vertical position of the second stop element 40, which is adjustable by turning the adjusting ring 42 from the outside.
  • the first magnetic coupling 51 is engaged at the same time, since the first stop element 39 is at the same time the first magnetic coupling element 52 and the second stop element 40 at the same time the second magnetic coupling element 53.
  • Fig. 5 moved by introducing compressed air into the second air chamber 21 and venting the first air chamber 20 of the piston 12 upwards, wherein the first magnetic coupling 51 takes the pressure cylinder 6 with upwards. Concurrently with the mouth tool 7 of the driving ram 30 is raised.
  • the fourth magnetic coupling element 65 is coupled to the third magnetic coupling element 64 of the second magnetic coupling 63.
  • Fig. 6 the phase described above is terminated by the pins 77 striking the third magnetic coupling element 64 of the second magnetic coupling 63 and release it from the fourth magnetic coupling 65.
  • the pressure cylinder 6 is not back, since this is prevented by contact of the first holding element 33 on the second holding element 36 and the abutment of the second holding element 36 on the sixth holding element 62.
  • the tacker 1 is ready for another driving operation.
  • the second tacker 1 of Fig. 7 to 12 has no first magnetic device 54 to the first tacker.
  • the second tacker is provided with a nail centering 80 at the lower end of the necking tool 7.
  • the nail centering 83 has a circular disk-shaped centering housing 84 with a vertical centering channel 85, which is aligned with the drive-in channel 26.
  • the centering housing 84 two concentric rings 88, 89, 90, 91 of balls 92 are arranged in two horizontal planes one above the other in chambers 86, 87 which are designed as radial ball guide channels.
  • the balls 92 of the two stacked inner rings 88, 90 are partially in the centering 85 in, with adjacent balls 92 are supported against each other. Adjacent balls 92 of the outer rings 89, 91 and the inner rings 88, 90 abut each other at their equator.
  • the centering housing 84 has in each case in the equatorial plane of the upper rings 88, 89 and the lower rings 90, 91 a circumferential groove 93, 94, which extends into the chambers 86, 87 in the centering 84 in which the balls 92 are arranged ,
  • a circumferential groove 93, 94 which extends into the chambers 86, 87 in the centering 84 in which the balls 92 are arranged .
  • each groove 93, 94 sits a snap ring 95, 96 which presses under elastic bias against the balls 92 of the outer ring 89, 91, which in turn push the balls of the inner rings 88, 90 until abutting each other in the centering 85, so between the balls 92 of the inner rings 88, 90 a centering opening 85 remains.
  • O-rings 97, 98 are interposed between the balls 92 of the inner rings 88, 90 and the outer rings 89, 91 arranged to compensate for different diameters of standard balls 92 and snap rings 95, 96, so that the balls 92 of the inner rings 88, 90 abut each other.
  • the driving ram 30 is provided in a lower portion with circumferential, superimposed grooves 101, 102.
  • the grooves 101, 102 are slightly rounded, corresponding to the outer contour of the balls 92 of the Nagelzentritation 83.
  • the distance between the two grooves 101, 102 corresponds to the distance of the superposed wreaths 88, 89, 90, 91 from each other.
  • a nail 82 By further moving the piston 12 down a nail 82 is driven.
  • the nail shaft is centered by the rings 88, 89, 90, 91 of balls 92 so that it just penetrates into the workpiece 3.
  • Fig. 9 shows the driving tool with driven in the predetermined Ein effetiefe nail 82.
  • the balls 92 of the two inner rings 88, 90 engage in the two grooves 101, 102 and are held by the snap rings 95, 96, 97, 98, 99, 100 therein.
  • the pressure cylinder 6 is prevented from moving further upwards and the driving ram 30 is pulled out of the nail centering device 83.
  • the pins 77 release the second magnetic coupling 63.
  • the pressure cylinder 6 is held by abutment of the first holding element 33 on the second holding element 36 and the second holding element 36 on the sixth holding element 62. This is in Fig. 11 shown.
  • the third tacker 1 of FIGS. 13 to 17 has in contrast to the first tacker neither a first magnetic coupling, a second magnetic coupling, nor a lifting device on. Furthermore, the second holding element 36 is not held axially displaceably on the pressure cylinder 6, but instead is fixed in an inner step 103 at the upper edge thereof.
  • the piston 12 at the bottom has a hollow cylindrical, outer piston rod 15, at the lower edge of the first holding member 33 circumferentially protrudes radially outward (piston projection). Furthermore, centrally from the piston 12 downwardly there is an inner piston rod 15.2, which is connected to the driving ram 30. In the annular space between the inner piston rod 15.2 and outer piston rod 15.1 and in the pressure cylinder 6, a compression spring 104 is arranged, which is designed as a helical spring. The compression spring 104 is supported with the upper end on the underside of the piston 12 and with the lower end on the upper side of the first stop element 40 from.
  • the sealing member 17 has there the fourth O-ring.
  • Fig. 13 is in the initial situation in which the piston 12 is in the upper piston position, the first holding member 33 on the second holding member 36 and holds the pressure cylinder 6 on the underside of the sealing member 17 fixed.
  • the compression spring 104 is under a bias.
  • the necking tool 7 is located at a distance above the workpiece 3. The piston is held in the upper piston position by fed into the second air chamber 21 compressed air.
  • Fig. 14 the piston 12 is displaced downward by passing compressed air into the first air chamber 20 and the second air chamber 21 is vented.
  • the driving ram 30 and the pressure cylinder 6 shift downwards. Due to the action of the compression spring 104 and the dead weight of the pressure cylinder 6, the second holding element 36 is held in contact with the first holding element 33.
  • the necking tool 7 finally sits on the workpiece 3.
  • the first holding element 33 is released from the second holding element 36 and the outer piston rod 15.1 telescopes into the pressure cylinder 6.
  • the driving ram 30 is moved down the driving channel 26 and drives the nail 82 in the workpiece 3 a.
  • the Einilloniefe is determined by the set position of the second stop member 40, which meets the lower end of the outer piston rod 15.1 as a first stop element 39.
  • the first holding member 33 takes the second holding member 36 and thus the pressure cylinder 6, so that the mouth tool 7 is lifted from the workpiece 3.
  • the pressure cylinder 6 bears against the underside of the sealing element 17. This is in Fig. 17 shown.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Forests & Forestry (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Claims (15)

  1. Agrafeuse destinée à enfoncer des moyens de fixation dans des pièces comprenant
    - un cylindre principal (4) doté d'un piston (12) pouvant s'y déplacer et d'un élément d'étanchéité (17) à l'extrémité inférieure avec un premier trou traversant (18), par lequel la tige de piston (15) reliée au piston (12) passe de manière étanche, dans laquelle il existe à l'intérieur du cylindre principal (4) au-dessus du piston (12) une première chambre d'air (20) reliée à une première prise d'air servant au remplissage d'air afin de déplacer le piston (12) vers le bas et en dessous du piston (12) une seconde chambre d'air (21) reliée à une seconde prise d'air servant au remplissage d'air afin de déplacer le piston (12) vers le haut,
    caractérisée par
    - un cylindre de pression (6), qui porte à l'extrémité inférieure un outil à orifice (7) doté d'un canal d'enfoncement (26), dans lequel un tronçon inférieur d'un poussoir d'enfoncement (30) relié à la tige de piston (15) dépasse à travers une ouverture supérieure (27), et qui présente en bas une ouverture inférieure (28) pour la sortie des moyens de fixation (79),
    - un chargeur (8) de moyens de fixation (82), qui est raccordé à une ouverture latérale (29) du canal d'enfoncement (26) pour alimenter le canal d'enfoncement (26) en moyens de fixation (82),
    - un premier dispositif de maintien (32), qui présente un premier élément de maintien (33) relié à la tige de piston (15) et un deuxième élément de maintien (36) relié au cylindre de pression (6), qui sont conçus de manière que le cylindre de pression (6) est déplaçable dans une position supérieure du cylindre de pression moyenné par le déplacement du piston (12) dans une position supérieure du piston et que l'outil à orifice (7) peut être posé sur une pièce (3) moyenné par le déplacement du piston (12) de la position supérieure du piston vers le bas,
    - un premier dispositif de butée (38), qui présente un premier élément de butée (39) relié à la tige de piston (15) et un deuxième élément de butée (40) relié au cylindre de pression (6), qui sont conçus de manière à limiter le déplacement du poussoir d'enfoncement (30) vers le bas pour enfoncer un élément de fixation (82) sortant du canal d'enfoncement (26) à une certaine profondeur de pénétration dans une pièce (3) à l'aide du poussoir d'enfoncement (30).
  2. Agrafeuse selon la revendication 1, dans laquelle le premier dispositif de maintien (32) comprend un premier épaulement (33) en saillie radiale vers l'extérieur partant de la tige de piston (15) et un second épaulement (36) en saillie radiale vers l'intérieur partant du cylindre de pression (6), le premier épaulement (33) étant disposé en dessous du second épaulement (36), si bien que le premier épaulement (33) est plaqué contre la face inférieure du second épaulement (36) dans la position supérieure du piston et est déplaçable vers le bas depuis le second épaulement (36), lorsque l'outil à orifice (7) repose sur la pièce (3).
  3. Agrafeuse selon la revendication 2, dans laquelle le premier épaulement (33) est disposé en bas sur une tige de piston extérieure (15), cylindrique creuse, qui est passée à travers le trou traversant (18) de manière étanche, le bord inférieur de la tige de piston extérieure (15.1) est le premier élément de butée (52), le poussoir d'enfoncement (30) est relié à une tige de piston intérieure (15.2) disposée concentriquement dans la tige de piston extérieure (15.1) et un ressort de compression (104) est disposé dans l'espace annulaire entre la tige de piston extérieure (15.1) et la tige de piston intérieure (15.2) ainsi que dans le cylindre de pression (6) en prenant appui par une extrémité sur la face inférieure du piston principal (12) et par l'autre extrémité sur la face supérieure du deuxième élément de butée (40).
  4. Agrafeuse selon la revendication 1 ou 2, dans laquelle il existe un deuxième dispositif de maintien (51), qui présente un troisième élément de maintien (52) relié à la tige de piston (15) et un quatrième élément de maintien (53) relié au cylindre de pression (6), qui sont conçus de manière qu'ils immobilisent la tige de piston (15) sur le cylindre de pression (6) lors de la mise en appui du premier élément de butée (39) contre le deuxième élément de butée (40), si bien que le cylindre de pression (6) est déplaçable vers le haut entraîné par le déplacement du piston (12) vers le haut, dans laquelle il existe un troisième dispositif de maintien (60), qui présente un cinquième élément de maintien sur le cylindre principal (4) et un sixième élément de maintien (62) sur le cylindre de pression (6), qui sont conçus de manière qu'ils peuvent être reliés l'un à l'autre par le déplacement du cylindre de pression (6) vers le haut, moyennant quoi le cylindre de pression (6) est maintenu dans la position atteinte et la liaison entre les troisième et quatrième éléments de maintien (52, 53) du deuxième dispositif de maintien (51) est supprimée lors du déplacement ultérieur du piston (12) vers le haut, et dans laquelle il existe un dispositif d'enlèvement (76), qui est conçu de manière qu'il détache la liaison entre les cinquième et sixième éléments de maintien (61, 62) lorsque le premier élément de maintien (33) rencontre le second élément de maintien (36).
  5. Agrafeuse selon la revendication 4, dans laquelle le deuxième dispositif de maintien (51) est un premier accouplement magnétique (54), dans laquelle un premier élément d'accouplement magnétique (55) est relié à la tige de piston (15) et un second élément d'accouplement magnétique (56) est relié au cylindre de pression (6).
  6. Agrafeuse selon la revendication 5, dans laquelle le premier élément d'accouplement magnétique (55) est le premier élément de butée (39) et le second élément d'accouplement magnétique (56) est le deuxième élément de butée (40).
  7. Agrafeuse selon l'une des revendications 4 à 6, dans laquelle le troisième dispositif de maintien (60) comprend un deuxième accouplement magnétique (63), qui présente un troisième élément d'accouplement magnétique (64) relié au cylindre principal (4) et un quatrième élément d'accouplement magnétique (65) relié au cylindre de pression (6), et dans laquelle le troisième dispositif de maintien (60) comprend un deuxième dispositif de butée (73), qui présente un troisième élément de butée (74) sur le cylindre principal (4) et un quatrième élément de butée (75) sur le cylindre de pression (6), qui sont conçus de manière à empêcher en position juxtaposée un déplacement ultérieur du cylindre de pression (6) vers le haut.
  8. Agrafeuse selon la revendication 7, dans laquelle le dispositif d'enlèvement (76) comprend des broches (77) alignées verticalement, le deuxième élément de maintien (36) est déplaçable à la verticale jusqu'à la mise en appui sur le sixième élément de maintien (62), les broches (77) avec leurs extrémités supérieures étant déplaçables vers le haut au-delà du sixième élément de maintien (62) pour dégager le cinquième élément de maintien (61) du sixième élément de maintien (62) et le piston (12) se trouvant dans la position supérieure du piston lors de la mise en appui du deuxième élément de maintien (36) sur le sixième élément de maintien (62).
  9. Agrafeuse selon les revendications 7 et 8, dans laquelle le troisième élément d'accouplement magnétique (64) est maintenu sur un dispositif de guidage vertical, qui est conçu de manière que le troisième élément d'accouplement magnétique (64) est déplaçable verticalement vers le haut en partant d'une position de butée inférieure, le troisième élément d'accouplement magnétique (64) pouvant être accouplé au quatrième élément d'accouplement magnétique (65) dans la position de butée inférieure et pouvant être dégagé vers le haut du quatrième élément d'accouplement magnétique (65) au moyen des broches (77).
  10. Agrafeuse selon la revendication 4, dans laquelle le deuxième dispositif de maintien présente au moins une rainure (101, 102) dans un tronçon inférieur du poussoir d'enfoncement (30) et au moins un élément d'encliquetage (93) sur l'outil à orifice (7), qui s'enclenche dans la rainure (101, 102) lors de la mise en appui du premier élément de butée (39) sur le deuxième élément de butée (40).
  11. Agrafeuse selon la revendication 10, dans laquelle l'outil à orifice (7) présente en bas un centrage par pointe (83), qui présente une ouverture de centrage (85.1) en dessous du canal d'enfoncement (26), qui est limité par au moins un élément de guidage (92) mobile dans le sens radial, lequel est prétendu par au moins un dispositif à ressort (95, 96) dans le sens radial jusqu'au canal de centrage (85), l'élément de guidage (92) étant à la fois l'élément d'encliquetage du troisième dispositif de maintien.
  12. Agrafeuse selon la revendication 11, dans laquelle le centrage par pointe (83) comprend un boîtier de centrage (84), à l'intérieur duquel au moins une couronne (88 à 91) de billes (92) est disposée, entre lesquelles l'ouverture de centrage (85.1) est définie, au moins un anneau d'arrêt élastique ou un autre anneau élastique agissant de l'extérieur sur les billes (92) comme un dispositif à ressort (95, 96).
  13. Agrafeuse selon l'une des revendications 1 à 12, dans laquelle le deuxième élément de butée (40) est maintenu par un dispositif de réglage (41) dans le cylindre de pression (6), le dispositif de réglage (41) étant conçu pour ajuster la position verticale du deuxième élément de butée (40) dans le cylindre de pression (6).
  14. Agrafeuse selon la revendication 13, dans laquelle le deuxième élément de butée (40) est un anneau doté d'un filetage extérieur (44), qui est vissé dans un filetage intérieur (43) d'une bague de réglage (42), la bague de réglage (42) étant guidée entre un premier et un second paliers dans le cylindre de pression (6), si bien qu'elle peut pivoter dans le cylindre de pression (6), mais n'est pas déplaçable à la verticale, et il existe un guidage linéaire (50), lequel autorise un déplacement du deuxième élément de butée (40) à la verticale, mais empêche que celui-ci ne pivote autour d'un axe vertical.
  15. Agrafeuse selon l'une des revendications 1 à 14, maintenue sur un pont d'usinage du bois (2) ou sur un autre dispositif de déplacement ou sur un porte-outils stationnaire.
EP17171988.3A 2017-05-19 2017-05-19 Agrafeuse destinée à enfoncer des moyens de fixation dans des pièces Active EP3403787B1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP17171988.3A EP3403787B1 (fr) 2017-05-19 2017-05-19 Agrafeuse destinée à enfoncer des moyens de fixation dans des pièces
RU2018117425A RU2714148C2 (ru) 2017-05-19 2018-05-11 Забивное устройство для забивания крепежных средств в изделия
AU2018203410A AU2018203410B2 (en) 2017-05-19 2018-05-15 Driving tool for driving fastening means into workpieces
US15/982,149 US10661470B2 (en) 2017-05-19 2018-05-17 Driving tool for driving fastening means into workpieces

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17171988.3A EP3403787B1 (fr) 2017-05-19 2017-05-19 Agrafeuse destinée à enfoncer des moyens de fixation dans des pièces

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EP3403787A1 EP3403787A1 (fr) 2018-11-21
EP3403787B1 true EP3403787B1 (fr) 2019-07-31

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US (1) US10661470B2 (fr)
EP (1) EP3403787B1 (fr)
AU (1) AU2018203410B2 (fr)
RU (1) RU2714148C2 (fr)

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Publication number Publication date
US20180333888A1 (en) 2018-11-22
AU2018203410A1 (en) 2018-12-06
EP3403787A1 (fr) 2018-11-21
US10661470B2 (en) 2020-05-26
RU2018117425A (ru) 2019-11-11
AU2018203410B2 (en) 2020-08-06
RU2018117425A3 (fr) 2019-12-13
RU2714148C2 (ru) 2020-02-12

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