EP3760379B1 - Cloueur pneumatique doté d'un dispositif de sécurité - Google Patents

Cloueur pneumatique doté d'un dispositif de sécurité Download PDF

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Publication number
EP3760379B1
EP3760379B1 EP19183856.4A EP19183856A EP3760379B1 EP 3760379 B1 EP3760379 B1 EP 3760379B1 EP 19183856 A EP19183856 A EP 19183856A EP 3760379 B1 EP3760379 B1 EP 3760379B1
Authority
EP
European Patent Office
Prior art keywords
compressed air
nail gun
control valve
air nail
trigger
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
EP19183856.4A
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German (de)
English (en)
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EP3760379A1 (fr
Inventor
Joachim Bauer
Martin THEBERATH
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.)
Bea GmbH
Original Assignee
Bea GmbH
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 Bea GmbH filed Critical Bea GmbH
Priority to EP19183856.4A priority Critical patent/EP3760379B1/fr
Priority to PL19183856T priority patent/PL3760379T3/pl
Priority to ES19183856T priority patent/ES2904999T3/es
Priority to TW109120415A priority patent/TW202102345A/zh
Priority to JP2021578230A priority patent/JP2022540075A/ja
Priority to PCT/EP2020/068652 priority patent/WO2021001477A1/fr
Priority to AU2020300007A priority patent/AU2020300007B2/en
Priority to CN202080048654.5A priority patent/CN114080300A/zh
Priority to US17/623,415 priority patent/US20220347825A1/en
Publication of EP3760379A1 publication Critical patent/EP3760379A1/fr
Application granted granted Critical
Publication of EP3760379B1 publication Critical patent/EP3760379B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B25C1/04—Hand-held nailing tools; Nail feeding devices operated by fluid pressure, e.g. by air 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
    • B25C1/008—Safety 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
    • B25C1/043—Trigger valve and trigger mechanism

Definitions

  • the invention relates to a compressed air nailer that has a trigger, a touchdown sensor and a safety device. If the pneumatic nailer is placed on a workpiece, the placement sensor is displaced against the force of a spring until a muzzle tool is in contact or almost in contact with the workpiece. A driving-in process can only be triggered when the contact sensor is actuated in this way. As a result, the pneumatic nail guns offer significantly improved security against unintentional triggering compared to devices without a contact sensor.
  • Some compressed air nailers of the type described can be used in two different operating modes: With the so-called single release, the compressed air nailer is first attached to a workpiece and the contact sensor is actuated as a result. The trigger is then actuated by hand, thereby triggering a single driving-in process. With the so-called contact release, also known as “touching”, the user keeps the trigger pressed while applying the pneumatic nailer to the workpiece. When it is placed on the workpiece, the contact sensor is actuated, triggering a driving-in process.
  • the pneumatic nailer can be used repeatedly in quick succession, which enables very fast work, especially when a large number of fasteners have to be driven in for adequate fastening, and the positioning accuracy of which is not very demanding.
  • the contact triggering method poses an increased risk of injury.
  • the user can hold the hand-operated trigger not only when setting the gun on the same workpiece a few centimeters from the last fastener driven, but also when changing to a different, remotely located workpiece a driving-in process if an object or part of the body is accidentally touched by the contact sensor to be triggered.
  • accidents can occur if a user (disregarding important safety regulations) climbs a ladder with the pneumatic nail gun while holding the trigger and accidentally brushes their leg with the touchdown probe.
  • Some known compressed air nailers attempt to reduce this risk associated with the contact-triggering operation in that contact triggering is only possible for a short period of time after the trigger has been actuated or after a driving-in process. When the time has elapsed, the trigger must first be released again.
  • An example of this is from the reference EP 2 767 365 B1 known.
  • the pneumatic nailer described therein has a trigger and a touchdown sensor, each of which is assigned a control valve.
  • the known device has a safety control chamber whose pressure acts on a locking piston. In a specific position of the locking piston, the triggering of a driving-in process is prevented.
  • the safety control chamber is pressurized via the control valve assigned to the trigger and a throttle.
  • U.S. Patent No. 3,964,659 known pneumatic nailer which can also be used in a single and in a contact release operation and in which a trigger and a contact sensor are mechanically coupled via a rocker.
  • the rocker acts on a control valve to initiate a driving operation by venting a main control line. If only the trigger and not the contact sensor is actuated, a control pin of the control valve is only displaced over part of its adjustment path. This half actuation of the control valve results in slow venting of a control chamber via a small, adjustable ventilation opening.
  • the pressure in the control chamber acts on a valve sleeve surrounding the control valve and eventually displaces this valve sleeve into a blocked position in which full actuation of the valve pin can no longer vent the main control line and contact release is not possible.
  • a further improvement in safety can be achieved if a first driving-in process always has to be carried out individually.
  • the device must first be placed on the workpiece for the first driving-in process, which activates the placement sensor. Subsequent actuation of the trigger then triggers the first driving-in process. After that, within a short period of time, further driving processes can be carried out by contact triggering, i.e. by repeatedly lifting and applying the device to the workpiece while the trigger is continuously pressed.
  • contact triggering i.e. by repeatedly lifting and applying the device to the workpiece while the trigger is continuously pressed.
  • This functionality is in the in the reference DE 10 2013 106 657 A1 described compressed air nailer given.
  • a trigger and a contact sensor are mechanically coupled via a rocker, which acts on a control valve in order to trigger a driving-in process.
  • a pressure is built up in a relatively large-volume control chamber, which surrounds a working cylinder in the form of a ring, and this pressure acts on a mechanical actuator.
  • the control chamber is slowly vented via a vent opening in a wall of the working cylinder.
  • the actuator moves into a blocking position, which prevents the contact sensor from having a mechanical effect on the rocker when the trigger is actuated and makes it impossible to trigger a contact.
  • a pneumatic nailer has become known in which the functionality described is achieved pneumatically.
  • a control chamber is vented via the control valve when a control valve is actuated.
  • a delay time after which the pneumatic nailer returns from the contact release mode to the single release mode is given by slow venting of the control chamber through a throttle.
  • the control chamber merges into a first, smaller storage chamber, which is connected to a second, larger storage chamber via a first throttle.
  • the smaller storage chamber is ventilated via a control valve.
  • the larger storage chamber is ventilated from a retrieval chamber.
  • the slow ventilation takes place via a second throttle, which connects the second storage chamber with outside air.
  • a second throttle which connects the second storage chamber with outside air.
  • a larger amount of air can be used to adjust the delay time than could be made available solely via the control valve in the time available.
  • This is intended to enable the use of a throttle that is easy to produce and is not very susceptible to faults, with a relatively large opening cross section, in particular in the form of a small bore with a diameter in the range from 0.1 mm to 1 mm.
  • the compressed air tool is used to drive in fasteners such as nails, pins or staples.
  • the pneumatic nailer can have a magazine for the fasteners, from which one fastener is fed to a receptacle of a muzzle tool of the pneumatic nailer.
  • the working piston of the pneumatic nailer is pressurized with compressed air.
  • the working piston drives a driving ram which is connected to the working piston.
  • the driving ram impacts a rearward end of the fastener in the neck tool receptacle and drives the fastener into the workpiece.
  • the contact sensor can be a mechanical component that protrudes beyond the front end of the muzzle tool and is held in this position by a spring until the pneumatic nailer is placed on a workpiece. Then the placement sensor is displaced counter to the direction of the spring force and counter to the driving direction until a muzzle tool of the pneumatic nailer is in contact or almost in contact with the workpiece.
  • the pneumatic nailer has a trigger as a further actuating element, for example in the form of a trigger lever that can be actuated with a finger.
  • the safety device is responsible for preventing a driving process from being triggered in certain potentially dangerous situations. she meets a safety measure that ensures that no driving-in process is triggered despite a joint activation of the contact sensor and trigger.
  • the safety measure can consist of disconnecting the pneumatic nailer from a pressure supply line and venting it completely.
  • less drastic safety measures are also possible, in particular those in which the pneumatic nailer is restored to an operational state simply by briefly releasing the trigger. Details on this will be explained later.
  • the safety device takes the safety measure automatically after a delay time has elapsed.
  • the delay time begins to run from a specific event, such as a trigger pull or a previous driving operation.
  • the pressure in the control volume can have a specific initial value, for example operating pressure or ambient pressure.
  • the control volume is aerated or vented via the throttle until the pressure in the control volume exceeds or falls below a predetermined pressure threshold.
  • the delay time ends. The duration of the delay time is therefore determined by the volume of the control chamber and the opening cross-section of the throttle.
  • control volume has a volume in the range from 0.5 ml to 20 ml, in particular in the range from 0.5 ml to 10 ml, in the range from 0.5 ml to 5 ml, in the range from 0.5 ml to 2 ml or in the range from 1 ml to 1.5 ml.
  • the throttle is a bore with a diameter in the range from 30 ⁇ m to 95 ⁇ m, in particular in the range from 40 ⁇ m to 80 ⁇ m or in the range from 60 ⁇ m to 80 ⁇ m .
  • the bore can in particular have a substantially circular cross section. A relatively small volume is therefore combined with a small opening cross-section in order to achieve an adequate
  • an annular gap with a sufficiently small opening cross section has a very small gap width, which can be in the range of a few ⁇ m or even less, and that such an annular gap easily clogs over time during operation of the pneumatic nail gun. This is detrimental to the safety of the device, because the result may be that the delay time continues to lengthen unnoticed until the safety device possibly no longer responds at all. It is assumed that the smallest particles are responsible for the clogging of the annular gap, the penetration of which into the compressed air nailer can hardly be prevented, if only because such particles, in particular fine dust, can already be contained in a certain concentration in the compressed air used to operate the devices.
  • the bore used in the invention has an opening cross section comparable to that of the annular gap, the diameter of the bore is significantly larger than the width of the annular gap.
  • the inventors have found that the safety device is significantly less sensitive to contamination when using a bore instead of a throttle with an annular gap, and attribute this to the different dimensions of the respective openings mentioned.
  • the invention therefore provides a structurally simple, compact and particularly reliable safety device.
  • the hole is made by laser drilling.
  • the bore can be produced using any method, in particular using a machining method using a conventional drill or milling cutter.
  • Laser drilling represents an alternative in which the material in which the drilling is carried out is not machined, but is vaporized and/or liquefied by means of a laser. In contrast to machining processes, laser drilling may not be able to produce exactly cylindrical holes. However, this is not important for the invention. More important is the reproducibility of the hole dimensions, which can easily be achieved with laser drilling with the required quality.
  • a particular advantage of laser drilling compared to machining methods is the largely burr-free contour of the bore edges, which can be important in the invention with a view to possible "sticking" of dirt particles.
  • the bore has a length in the range from 30 ⁇ m to 1 mm.
  • the component in which the hole is made has a corresponding thickness immediately adjacent to the hole.
  • the material thickness of the component in the area of the bore can be reduced accordingly before the bore is made.
  • the length of the hole like its diameter, affects the flow of compressed air through the hole. For the low compressed air flow desired with a small control volume in order to achieve an appropriate delay time, a relatively long bore is therefore advisable under certain circumstances. Experiments have shown that the length of the hole in the area mentioned is practical in many cases. A particularly long bore can sometimes be difficult to produce.
  • the bore can have the same diameter over its entire length, ie it can be exactly cylindrical. However, this is not necessary for the invention; Production-related deviations, such as a certain conicity of the hole, which can occur with laser drilling, are usually not a problem. If the bore deviates from an exactly cylindrical shape, the diameter of the bore can be a mean value of the diameter over the length of the hole or a minimum diameter of the hole can be used.
  • the compressed air nailer has a first control valve, which is actuated each time the trigger is actuated, the control volume being aerated or vented via the first control valve.
  • the first control valve is assigned to the trigger and is therefore sometimes referred to as the trigger valve.
  • the first control valve can have a valve pin which, when the trigger is actuated, is displaced directly by an actuating surface of the trigger lever.
  • the first control valve establishes a connection via which the control volume is aerated or vented, for example a connection between the control volume and a space permanently under operating pressure or between the control volume and outside air.
  • the delay time explained can begin with the actuation of the trigger.
  • the compressed air nailer has a second control valve that is actuated each time the touchdown sensor is actuated or when the trigger and touchdown sensor are actuated together, with a main control line being pressurized and/or vented via the second control valve.
  • the second control valve is assigned to the touchdown sensor and is therefore occasionally also referred to as touchdown sensor valve. Whether it is actuated each time the contact sensor is actuated or only when the trigger is actuated at the same time depends on the design of the pneumatic nail gun. Both variants will be explained in connection with the exemplary embodiments. In any case, the effect of the actuation of the second control valve is that a main control line is aerated and/or vented.
  • the second control valve can in particular establish a connection between the main control line and a space that is permanently under operating pressure or between the main control line and outside air.
  • a driving-in process can be initiated by venting or venting the main control line will.
  • an embodiment with a main valve and a pilot valve that is controlled via the main control line is known.
  • other constructions with or without a pilot valve are also conceivable.
  • control volume includes an annular volume surrounding a control valve.
  • control volume can have any geometry. In many types of compressed air nailer, however, the space available is limited, so that even the relatively small control volume in the invention cannot easily be accommodated. The use of an annular volume around a control valve accommodates this situation.
  • the control valve can in particular be the explained first control valve or the explained second control valve.
  • the compressed air nailer comprises a housing that has a recess in which a control valve arrangement is arranged, with the control volume being arranged completely or to a large extent in the recess.
  • the housing can, for example, enclose the working cylinder of the pneumatic nail gun and/or have a handle section.
  • the recess can be arranged, for example, within the handle section.
  • the control valve arrangement can in particular comprise the explained first control valve and/or the explained second control valve.
  • the control valve assembly may be sealed from the surrounding housing.
  • the control volume may be between the control valve assembly and the housing. In this configuration, a particularly compact and constructively simple structure is obtained.
  • the bore is arranged in an exchangeable component of the pneumatic nailer.
  • the replaceable component is in particular one of the housing the compressed air nailer different component, such as an element of a control valve assembly or a compressed air line.
  • this configuration enables simplified maintenance or repair of the borehole, for example in order to be able to thoroughly free it from contamination or corrosion.
  • the delay time can be adapted to the respective requirements by using exchangeable components with different bore diameters and/or lengths.
  • At least one second copy of the replaceable component is present, which differs from the replaceable component in terms of the diameter and/or the length of the bore.
  • the compressed air nailer with the replaceable component and the at least one second copy of the replaceable component can be offered in a set.
  • the replaceable component is a valve sleeve.
  • This can in particular be a valve sleeve of the first control valve, which results in a particularly simple and compact design for the ventilation or venting of the control volume through the bore and controlled by the first control valve.
  • the safety measure is that the compressed air nailer is placed in a locked state in which no driving-in process can be triggered.
  • the compressed air nailer can have a locking piston that mechanically intervenes in a sequence required to trigger a driving-in process, for example by preventing displacement of an actuator of a pilot valve.
  • the blocked state can be produced by shutting off the compressed air nailer from a compressed air supply and/or completely venting it by means of a shut-off valve.
  • it is possible to produce the blocked state by opening or blocking a control line, which has to be aerated or vented to trigger a driving-in process, by means of a shut-off valve. This control line can in particular be the main control line already mentioned.
  • the pneumatic nailer can be operated in a contact trigger mode and a single trigger mode, and the safety measure is that the pneumatic nailer is switched from the contact trigger mode to the single trigger mode. As explained at the outset, this measure can also improve the operational reliability of the compressed air nailer. After the pneumatic nailer has been set to single-trigger mode, contact triggering is not possible. Instead, a single release must first be carried out, which is usually only possible again if the trigger has previously been released.
  • the compressed air nailer has a locking sleeve that can be moved between a locking position and an open position, the locking sleeve locking a connection between a main control line and a control valve in the locking position and opening it in the open position.
  • the security measure can consist essentially in the fact that the locking sleeve is shifted into the locking position.
  • the locking sleeve can be integrated into a control valve arrangement which comprises the first control valve explained and/or the second control valve explained. In particular, the locking sleeve can accommodate the explained second control valve in its interior.
  • the pressure in the control volume is applied to the locking sleeve.
  • the position of the locking sleeve is directly influenced by the pressure prevailing in the control volume.
  • the force exerted by this pressure can in particular be combined with another, pneumatically generated counterforce and/or the force of a spring.
  • the pneumatic nailer off 1 comprises a working piston 10 which is connected to a driving ram 12 .
  • the working piston 10 is in a working cylinder 14 moveable. If compressed air is applied to it above the working piston 10 , a fastener (not shown) can be driven into a workpiece using the driving ram 12 .
  • the main valve 16 is activated by a pilot valve 18 .
  • the pilot valve 18 in turn is activated by a main control line 20 . As soon as the main control line 20 is pressurized, the pilot valve 18 switches and then the main valve 16 and a driving-in process is triggered.
  • control valve assembly is responsible for controlling the pressure in the main control line 20 and thus for triggering the driving processes.
  • These elements include a first control valve 22, a second control valve 24, a trigger 26 and a touchdown sensor 28.
  • the cross-sectional view of FIG 1 only an upper end shown.
  • the touchdown sensor 24 also includes a lower end 104 in the 1 is shown schematically and protrudes through an opening of a neck tool, not shown. Details of the control valve assembly are based on the enlarged view of 2 explained in more detail.
  • figure 2 shows the control valve arrangement in an initial state of the pneumatic nailer, in which the trigger 26 and touchdown sensor 28 are not actuated and the pneumatic nailer properly connected to a compressed air source.
  • the housing interior 32 (which is also only partially shown) arranged within the housing 30, which can only be seen in part, is then constantly under operating pressure.
  • the housing 30 is on the right edge of the 2 into a handle portion 34 of the pneumatic nailer.
  • the trigger 26 is mounted on the housing 30 such that it can pivot about an axis 36 fixed to the housing. At its rear end it has an actuating surface 38 by means of which a valve pin 40 of the first control valve 22 can be displaced.
  • the rear end of the touchdown sensor 28 cooperates with a touchdown sensor lever 42 partially disposed within a recess of the trigger 26 .
  • the contact sensor lever 42 is mounted on the housing 30 such that it can pivot about an axis 44 fixed to the housing.
  • the front end of the placement sensor lever 42 is carried along by the rear end of the placement sensor 28 when the placement sensor 28 moves upward relative to the housing 30 when the pneumatic nailer is attached to a workpiece.
  • an actuating surface 46 of the touchdown sensor lever 42 displaces a valve pin 48 of the second control valve 24 upwards.
  • the first control valve 22 includes a lower valve sleeve 50 and an upper valve sleeve 52.
  • a small bore 54 is disposed in the lower valve sleeve 50 in a transverse direction. This bore 54 has a diameter of about 70 microns and a length of about 200 microns. Because of these very small dimensions, the bore 54 is in the 2 not to scale, but slightly enlarged.
  • the space 56 arranged within the lower valve sleeve 50 and adjoining the bore 54 is constantly connected to outside air via a transverse bore 106 in the upper valve sleeve 52 and an inclined bore 108 in the housing 34 . Another permanent connection between the space 56 and the outside air is via an annular gap 58 between the valve pin 40 and the lower valve sleeve 50.
  • the lower O-ring 60 on the valve pin 40 is not in a seal, so that via the transverse bore 62 in the upper valve sleeve 52 the inclined bore 64 and a space 66 connected to it above a locking sleeve 68, which surrounds the second control valve 24, is vented.
  • the locking sleeve 68 In the initial state shown, the locking sleeve 68 is in an upper end position, in which it is held by the force of a spring 70 . This upper end position is an open position. A further force on the locking sleeve 68 is exerted by the pressure in a control volume 72 which surrounds the second control valve 24 in the form of a ring. In the initial state shown, this force is zero because the control volume 72 has not yet been subjected to compressed air and is connected to the outside air via the bore 54 . In the example shown, the control volume 72 has a volume in the range between 1 ml and 1.5 ml.
  • the main control line 20 is via a transverse bore 80 in the locking sleeve 68, past the upper O-ring 76, via a transverse bore 82, a Annular gap 84 between valve pin 48 and valve sleeve 78 and connected to the O-ring 74 over with outside air.
  • valve pin 48 of the second control valve 24 is displaced against the force of a spring 86 into its actuated, in 3 position shown, in which the O-ring 74 is in sealing.
  • the main control line 20 is blocked from outside air.
  • the displacement of the valve pin 48 drives its upper O-ring 88 out of the seal, thereby establishing a connection between the space 66 and the main control line 20, namely past the O-ring 88 the transverse bore 82, past the O-ring 76 and through the transverse bore 80. Since the space 66 is still depressurized, this does not trigger a driving operation.
  • the valve pin 40 of the first control valve 22 is displaced to its actuated position and the lower o-ring 60 is seated and an upper o-ring 90 of the valve pin 40 is unsealed.
  • the housing interior 32 which is always aerated
  • the space 66 via the transverse bore 62 in the upper valve sleeve 52.
  • the control volume 72 is vented via a check valve formed by a central O-ring 92 on the valve sleeve 78 .
  • the control volume 72 and the space 66 are therefore under operating pressure.
  • the three forces acting on the locking sleeve 68 continue to interact in such a way that the locking sleeve 68 remains in its upper end position.
  • the contact sensor 28 moves back down, so that the valve pin 48 of the second control valve 24 also returns to its initial position, as in FIG figure 5 shown.
  • the upper O-ring 88 of the valve pin 48 moves into a seal again, so that no further supply of compressed air to the main control line 20 or into the control volume 72 is possible.
  • the pressure in the control volume 72 slowly builds up via the bore 54 .
  • the main control line 20 is already on the 2 vented connection described with outside air.
  • a contact release can be made at any time because the main control line 20 can be vented again by moving the valve pin 48 upwards.
  • the pressure in the control volume 72 is then Check valve refreshed so that the delay time within which another contact release is possible starts again.
  • the contact sensor 28 remains unactuated for a certain period of time when the trigger 26 is actuated, the pressure in the control volume 72 drops below a predetermined pressure threshold. This changes the balance of the three forces acting on the locking sleeve 68, and the locking sleeve 68 comes into its in the 6 shown lower end position.
  • the lower end position is a locked position. In this position of the locking sleeve 68, a lower inner circumference of the locking sleeve 68 seals against the O-ring 94, so that compressed air can no longer be supplied to the control volume 72 via the check valve.
  • the upper O-ring 76 on the valve sleeve 78 becomes sealed, so that a supply of compressed air via the transverse bore 80 to the main control line 20 is likewise no longer possible.
  • the in 6 space designated 96 is connected to the outside air via a hole that is not visible. Since a central O-ring 98 on the locking sleeve 68 is not in a seal, the main control line 20 is vented via the space 96.
  • the shifting of the locking sleeve 68 into its locking position therefore represents a safety measure which reliably prevents the triggering of a further driving-in process. Further driving processes can only be triggered when the trigger 26 is released and the space 66 is vented as a result, so that the locking sleeve 68 moves back into its open position.
  • a second embodiment is based on the Figs. 7 to 10 explained.
  • the in 1 Elements shown schematically and with regard to the design of the second control valve 24 with the locking sleeve 68 there are no differences from the first exemplary embodiment Figs. 1 to 6 .
  • the elements taken over unchanged are provided with the same reference symbols as in the first exemplary embodiment and will not be explained again.
  • the changes mentioned compared to the first exemplary embodiment allow a particularly simple configuration of the first control valve 22.
  • This also includes a lower valve sleeve 50, in which the bore 54 is arranged, as explained in more detail with regard to the first exemplary embodiment.
  • the first control valve 22 exclusively fulfills the task of selectively aerating or venting the control volume 72 via the bore 54 .
  • the first control valve 22 in its in 7 Drawn, unactuated position past the upper O-ring 102 ago a connection between the space 56 within the lower valve sleeve 50 and the housing interior 32, while the lower O-ring 60 is in sealing.
  • the control volume 72 is therefore slowly aerated through the bore 54 .
  • the pneumatic nailer After a certain time after the pneumatic nailer has been connected to a compressed air source and in which neither the trigger 26 nor the touchdown sensor 28 has been actuated, the pneumatic nailer is in the in the 7 shown initial state.
  • the control volume 72 is under operating pressure and the locking sleeve 68 is in its open position.
  • figure 8 shows the situation after actuating the trigger 26.
  • the upper O-ring 102 of the valve pin 40 is in sealing and the control volume 72 is slowly vented via the bore 54.
  • the delay time begins to run when the trigger 26 is actuated.
  • the valve pin 48 of the second control valve 24 is displaced upwards, as in FIG 9 shown. This triggers a driving-in process in the same way as explained for the first exemplary embodiment. Also as explained for the first exemplary embodiment, the pressure in the control volume 72 is refreshed via the non-return valve formed by the central O-ring 92 .
  • valve pin 48 of the second control valve 24 After the pneumatic nailer has been lifted off a workpiece, the valve pin 48 of the second control valve 24 returns to its non-actuated position and the control volume 72 is slowly vented via the bore 54 . As long as the pressure threshold in the control volume 72 is not undershot, the locking sleeve 68 remains in its open position, so that the situation of those 8 is equivalent to. Another contact release is possible.
  • the locking sleeve 68 moves into its in 10 blocking position shown, which prevents further triggering in the same way as explained for the first exemplary embodiment.
  • the trigger 26 In order to enable further triggering, the trigger 26 must first be released again and the pressure in the control volume 72 has to exceed the pressure threshold and the locking sleeve 68 has been shifted back into its open position. Then the device is back in the in 8 shown ready-to-release state.
  • the housing 30 has two recesses which accommodate the first control valve 22 and the second control valve 24, respectively.
  • the control volume 72 is located within the recess that accommodates the second control valve 24 .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Claims (14)

  1. Cloueuse pneumatique comprenant :
    • un piston de travail (10) qui est relié à un poussoir d'enfoncement (12) servant à enfoncer un moyen de fixation et qui est soumis à l'action d'air comprimé lors du déclenchement d'une opération d'enfoncement
    • un déclencheur (26) et un capteur de contact (28), dont l'actionnement conjoint peut déclencher une opération d'enfoncement,
    • un dispositif de sécurité qui comprend un volume de commande (72) et qui est conçu pour prendre automatiquement une mesure de sécurité si un seuil de pression dans le volume de commande (72) est dépassé ou sous-dépassé, le volume de commande (72) étant aéré ou ventilé par un étranglement de telle sorte qu'une temporisation, après laquelle le seuil de pression est dépassé ou sous-dépassé, est prédéterminée par un volume du volume de commande (72) et une section transversale d'ouverture de l'étranglement, caractérisé en ce que
    • le volume de commande (72) comprend un volume dans la plage de 0,5 ml à 20 ml et l'étranglement est un perçage (54) d'un diamètre dans la plage de 30 µm à 95 µm.
  2. Cloueuse pneumatique selon la revendication 1, caractérisée en ce que le perçage (54) est réalisé par forage au laser.
  3. Cloueuse pneumatique selon la revendication 1 ou 2, caractérisée en ce que le perçage (54) présente une longueur dans la plage allant de 30 µm jusqu'à 1 mm.
  4. Cloueuse pneumatique selon l'une des revendications 1 à 3, caractérisée en ce que la cloueuse pneumatique présente une première soupape de commande (22) qui est actionnée lors de chaque déclenchement du déclencheur (26), le volume de commande (72) étant aéré ou ventilé par la première soupape de commande (22).
  5. Cloueuse pneumatique selon l'une des revendications 1 bis 4, caractérisée en ce que la cloueuse pneumatique présente une deuxième soupape de commande (24) qui est actionnée lors de chaque déclenchement du capteur de contact (28) ou lors du déclenchement conjoint du déclencheur (26) et du capteur de contact (28), une conduite de commande principale (20) étant aérée et/ou ventilée à l'aide de la deuxième soupape de commande (24).
  6. Cloueuse pneumatique selon l'une des revendications 1 bis 5, caractérisée en ce que le volume de commande (72) comporte un volume annulaire qui entoure une soupape de commande.
  7. Cloueuse pneumatique selon l'une des revendications 1 à 6, caractérisée en ce que la cloueuse pneumatique comporte un boîtier (30) qui présente un évidement dans lequel est agencé un agencement de soupape de commande, le volume de commande (72) étant agencé entièrement ou en grande partie dans l'évidement.
  8. Cloueuse pneumatique selon l'une des revendications 1 à 7, caractérisée en ce que le perçage (54) est agencé dans un élément de construction interchangeable de la cloueuse pneumatique.
  9. Cloueuse pneumatique selon la revendication 8, caractérisée en ce qu'il existe un deuxième exemplaire de l'élément de construction interchangeable qui se différencie en diamètre et/ou dans la longueur du perçage (54) de l'élément de construction interchangeable.
  10. Cloueuse pneumatique selon la revendication 8 ou 9, caractérisée en ce que l'élément de construction interchangeable est une douille de soupape (50).
  11. Cloueuse pneumatique selon l'une des revendications 1 à 10, caractérisée en ce que la mesure de sécurité consiste à placer la cloueuse pneumatique dans un état bloqué dans lequel aucune opération d'enfoncement ne peut être déclenchée.
  12. Cloueuse pneumatique selon l'une des revendications 1 à 11, caractérisée en ce que la cloueuse pneumatique peut être exploitée en un mode de déclenchement par contact et en un mode de déclenchement individuel et la mesure de sécurité consiste à faire passer la cloueuse pneumatique d'un mode de déclenchement par contact en un mode de déclenchement individuel.
  13. Cloueuse pneumatique selon l'une des revendications 1 à 12, caractérisée en ce que la cloueuse pneumatique présente une douille de verrouillage (68) qui est susceptible d'être déplacée entre une position de verrouillage et une position ouverte, la douille de verrouillage (68) bloquant une liaison entre une conduite de commande principale (20) et une soupape de commande dans la position de verrouillage et l'ouvrant dans la position ouverture.
  14. Cloueuse pneumatique selon la revendication 13, caractérisée en ce que la douille de verrouillage (68) est soumise à l'action de la pression dans le volume de commande (72).
EP19183856.4A 2019-07-02 2019-07-02 Cloueur pneumatique doté d'un dispositif de sécurité Active EP3760379B1 (fr)

Priority Applications (9)

Application Number Priority Date Filing Date Title
EP19183856.4A EP3760379B1 (fr) 2019-07-02 2019-07-02 Cloueur pneumatique doté d'un dispositif de sécurité
PL19183856T PL3760379T3 (pl) 2019-07-02 2019-07-02 Pneumatyczna gwoździarka z urządzeniem zabezpieczającym
ES19183856T ES2904999T3 (es) 2019-07-02 2019-07-02 Clavadora neumática con un dispositivo de seguridad
TW109120415A TW202102345A (zh) 2019-07-02 2020-06-17 具有安全裝置的壓縮氣動釘槍
JP2021578230A JP2022540075A (ja) 2019-07-02 2020-07-02 安全装置を有する圧縮空気式釘打機
PCT/EP2020/068652 WO2021001477A1 (fr) 2019-07-02 2020-07-02 Cloueuse pneumatique pourvue d'un dispositif de sécurité
AU2020300007A AU2020300007B2 (en) 2019-07-02 2020-07-02 Pneumatic nailer having a safety device
CN202080048654.5A CN114080300A (zh) 2019-07-02 2020-07-02 具有安全装置的压缩空气射钉器
US17/623,415 US20220347825A1 (en) 2019-07-02 2020-07-02 Compressed Air Nail Gun With a Safety Device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19183856.4A EP3760379B1 (fr) 2019-07-02 2019-07-02 Cloueur pneumatique doté d'un dispositif de sécurité

Publications (2)

Publication Number Publication Date
EP3760379A1 EP3760379A1 (fr) 2021-01-06
EP3760379B1 true EP3760379B1 (fr) 2022-01-12

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EP19183856.4A Active EP3760379B1 (fr) 2019-07-02 2019-07-02 Cloueur pneumatique doté d'un dispositif de sécurité

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US (1) US20220347825A1 (fr)
EP (1) EP3760379B1 (fr)
JP (1) JP2022540075A (fr)
CN (1) CN114080300A (fr)
AU (1) AU2020300007B2 (fr)
ES (1) ES2904999T3 (fr)
PL (1) PL3760379T3 (fr)
TW (1) TW202102345A (fr)
WO (1) WO2021001477A1 (fr)

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ES2618859T3 (es) 2013-02-19 2017-06-22 Joh. Friedrich Behrens Ag Clavadora neumática con un disparador accionable manualmente y un sensor de contacto
DE102013106657A1 (de) * 2013-06-25 2015-01-08 Illinois Tool Works Inc. Eintreibwerkzeug zum Eintreiben von Befestigungsmitteln in ein Werkstück
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EP3090836A1 (fr) * 2015-05-06 2016-11-09 Illinois Tool Works Inc. Outil pour enfoncer des organes de fixation à dispositif de sécurité amélioré
WO2017115593A1 (fr) * 2015-12-28 2017-07-06 日立工機株式会社 Dispositif d'entraînement
JP6819045B2 (ja) * 2016-01-26 2021-01-27 工機ホールディングス株式会社 打込機
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EP3257632A1 (fr) * 2016-06-15 2017-12-20 Joh. Friedrich Behrens AG Cloueur a air comprime comprenant un declenchement sequentiel et par contact
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Also Published As

Publication number Publication date
TW202102345A (zh) 2021-01-16
PL3760379T3 (pl) 2022-03-21
CN114080300A (zh) 2022-02-22
US20220347825A1 (en) 2022-11-03
JP2022540075A (ja) 2022-09-14
ES2904999T3 (es) 2022-04-06
WO2021001477A1 (fr) 2021-01-07
AU2020300007B2 (en) 2023-07-13
EP3760379A1 (fr) 2021-01-06
AU2020300007A1 (en) 2022-01-20

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