EP3760379A1 - 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
EP3760379A1
EP3760379A1 EP19183856.4A EP19183856A EP3760379A1 EP 3760379 A1 EP3760379 A1 EP 3760379A1 EP 19183856 A EP19183856 A EP 19183856A EP 3760379 A1 EP3760379 A1 EP 3760379A1
Authority
EP
European Patent Office
Prior art keywords
compressed air
control valve
volume
nailer
control
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.)
Granted
Application number
EP19183856.4A
Other languages
German (de)
English (en)
Other versions
EP3760379B1 (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
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 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 pneumatic nailer which has a trigger, an attachment sensor and a safety device. If the pneumatic nailer is placed on a workpiece, the attachment probe is displaced against the force of a spring until a muzzle tool is in contact with or almost in contact with the workpiece. A drive-in process can only be triggered when the contact sensor is activated in this way. Compared to devices without an attachment sensor, the pneumatic nailers offer considerably better security against unintentional triggering.
  • Some pneumatic nailers of the type described can be used in two different operating modes: With the so-called single triggering, the pneumatic nailer is first placed on a workpiece and the touch probe is activated. The trigger is then actuated by hand, thereby triggering a single driving process. With the so-called contact release, also known as “touching”, the user already holds the release button down while applying the pneumatic nailer to the workpiece. When the workpiece is placed on the workpiece, the touch probe is actuated and a driving process is triggered.
  • the pneumatic nailer can be used repeatedly in quick succession, which enables very quick work, in particular if many fasteners have to be driven in for adequate fastening, the positioning accuracy of which is subject to only minor requirements.
  • the contact release method increases the risk of injury. If the user keeps the manually operated trigger pressed, for example, not only when he wants to place the pneumatic nailer on one and the same workpiece at a distance of a few centimeters from the last driven fastening means, but also when he changes to another, remotely located workpiece a drive-in process if an object or part of the body is accidentally touched by the touch probe to be triggered. For example, accidents can occur if a user (in disregard of important safety regulations) climbs up a ladder with a pneumatic nailer, holds the trigger down and accidentally touches his leg with the touch probe.
  • Some known pneumatic nailers seek to reduce this risk associated with the contact release operation by ensuring that a contact release is only possible for a short period of time after the release has been actuated or after a driving process. Once the period has elapsed, the trigger must first be released.
  • An example of this is from the publication EP 2 767 365 B1 known.
  • the pneumatic nailer described therein has a trigger and an attachment sensor, each of which is assigned a control valve.
  • the known device has a safety control chamber, the pressure of which acts on a locking piston. In a certain position of the locking piston, the triggering of a driving process is prevented.
  • the safety control chamber is ventilated via the control valve assigned to the trigger and a throttle.
  • the pressure prevailing in the control chamber acts on a valve sleeve that surrounds the control valve, and finally shifts this valve sleeve into a blocking position in which full actuation of the valve pin can no longer vent the main control line, so that a contact cannot be triggered.
  • a further improvement in safety can be achieved if a first drive-in process always has to be carried out individually.
  • the device must first be attached to the workpiece for the first drive-in process, which actuates the touch-down sensor.
  • a subsequent actuation of the trigger then triggers the first driving process.
  • further driving processes can be carried out within a short period of time by contact triggering, i.e. by repeatedly lifting and placing the device on the workpiece while the trigger is continuously activated.
  • contact triggering i.e. by repeatedly lifting and placing the device on the workpiece while the trigger is continuously activated.
  • a pressure is built up in a relatively large-volume control chamber that surrounds a working cylinder in the shape of a ring, which 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 mechanical action of the touch-down sensor on the rocker when the trigger is actuated and makes contact triggering impossible.
  • a pneumatic nailer has become known in which the functionality described is achieved pneumatically.
  • a control chamber is ventilated via the control valve when a control valve is actuated.
  • a delay time after which the pneumatic nailer returns from contact release mode to single release mode results from 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 return chamber. The slow venting takes place via a second throttle that connects the second storage chamber with outside air.
  • the object of the invention is to provide a pneumatic nailer with a compact design and a simple, robust and reliable safety mechanism.
  • the pneumatic rod is used to drive fasteners such as nails, pins or staples.
  • the pneumatic nailer can have a magazine for the fastening means, from which a fastening means 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 that is connected to the working piston.
  • the driving ram strikes a rear end of the fastener in the receptacle of the muzzle tool and drives the fastener into the workpiece.
  • the attachment 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 attached to a workpiece. Then the attachment probe is moved against the direction of the spring force and against the driving direction until a muzzle tool of the pneumatic nailer is or is almost resting on 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 drive-in process from being triggered in certain potentially dangerous situations. she meets in addition, a safety measure automatically ensures that no drive-in process is triggered despite joint actuation of the touch-down sensor and trigger.
  • the safety measure can consist in 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 put back into an operational state by simply releasing the trigger for a short time. Details 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 certain event, for example from an actuation of the trigger or a previous driving process.
  • the pressure in the control volume can have a specific output value, for example operating pressure or ambient pressure.
  • the control volume is pressurized or vented via the throttle until the pressure in the control volume exceeds or falls below a predetermined pressure threshold.
  • the delay time ends at this point.
  • 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 up 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 200 ⁇ m, in particular in the range from 30 ⁇ m to 95 ⁇ m, 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 to achieve an adequate To get delay time.
  • a simple, small bore is used instead of a throttle, the opening cross section of which is formed by an adjustable annular gap.
  • a particularly compact, structurally simple structure is achieved by these measures.
  • an annular gap with a sufficiently small opening cross-section has a very small gap width, which can be, for example, in the range of a few microns or even less, and that such an annular gap easily clogs over time during operation of the pneumatic nailer. This is detrimental to the safety of the device because the result of the delay time may, under certain circumstances, continue to increase unnoticed until the safety device may no longer respond at all. It is assumed that the smallest particles are responsible for the clogging of the annular gap, the penetration of which into the pneumatic nailer can hardly be prevented, if only because such particles, especially fine dust, can already be contained in the compressed air used to operate the devices in a certain concentration.
  • the bore used in the invention has an opening cross-section comparable to 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 above-mentioned different dimensions of the respective openings.
  • the invention provides a structurally simple, compact and particularly reliable safety device.
  • the bore is produced by laser drilling.
  • the bore can be produced using any method, in particular using a machining method using a conventional drill or milling cutter.
  • the production of very small bores with machining processes is difficult and requires expensive and sensitive special tools that wear out quickly.
  • 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.
  • This is not important for the invention. More important is the reproducibility of the bore dimensions, which can easily be achieved with the required quality with laser drilling.
  • a particular advantage of laser drilling compared to machining processes is the largely burr-free contour of the bore edges, which can be of importance 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 bore is made has a corresponding thickness immediately adjacent to the bore.
  • the material thickness of the component in the region of the bore can be reduced accordingly before the bore is produced.
  • the length of the hole like its diameter, influences the flow of compressed air through the hole.
  • a relatively long bore may therefore be useful. Tests have shown that the length of the bore in the area mentioned is practical in many cases. A particularly long bore can be difficult to manufacture.
  • a length in the range from 30 ⁇ m to 200 ⁇ m, in particular in the range from 40 ⁇ m to 100 ⁇ m, is therefore particularly suitable.
  • the bore can have the same diameter over its entire length, that is to say it can be exactly cylindrical. However, this is not necessary for the invention; Manufacturing-related deviations, such as a certain conicity of the bore, which can occur with laser drilling, are usually not a problem. If the hole deviates from an exactly cylindrical shape, the diameter of the hole a mean value of the diameter over the length of the hole or a minimum diameter of the hole can be used.
  • the pneumatic nailer has a first control valve which is activated 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 also referred to as the trigger valve.
  • the first control valve can have a valve pin which, when the trigger is actuated, is displaced directly from an actuating surface of the triggering lever.
  • the first control valve establishes a connection via which the control volume is ventilated or vented, for example a connection between the control volume and a room permanently under operating pressure or between the control volume and outside air.
  • the explained delay time can begin with the actuation of the trigger.
  • the pneumatic nailer has a second control valve which is actuated each time the attachment sensor is actuated or each time the trigger and attachment sensor are actuated, a main control line being ventilated and / or vented via the second control valve.
  • the second control valve is assigned to the touch-down sensor and is therefore sometimes also referred to as the touch-down sensor valve. Whether it is activated each time the attachment sensor is activated or only when the trigger is activated at the same time depends on the design of the pneumatic nailer. Both variants are explained in connection with the exemplary embodiments. In any case, the effect of the activation of the second control valve is that a main control line is ventilated and / or vented.
  • the second control valve can in particular establish a connection between the main control line and a room that is permanently under operating pressure or between the main control line and outside air.
  • a driving process can be initiated by pressurizing or venting the main control line will.
  • an embodiment with a main valve and a pilot valve which 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 that surrounds a control valve.
  • control volume can have any geometry. In the case of many types of pneumatic nailer, however, the installation 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 pneumatic nailer comprises a housing which has a recess in which a control valve arrangement is arranged, the control volume being arranged entirely or for the most part in the recess.
  • the housing can, for example, enclose the working cylinder of the pneumatic nailer 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 arrangement can be sealed off from the surrounding housing.
  • the control volume can be located between the control valve arrangement and the housing. In this embodiment, a particularly compact and structurally 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 pneumatic nailer different component, for example an element of a control valve arrangement or a compressed air line.
  • this refinement enables simplified maintenance or repair of the bore, for example in order to be able to thoroughly free it of 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 exchangeable component is present, which differs from the exchangeable component in terms of diameter and / or length of the bore.
  • the pneumatic nailer with the exchangeable component and the at least one, second copy of the exchangeable component can be offered in one set.
  • the replaceable component is a valve sleeve.
  • This can in particular be a valve sleeve of the first control valve, whereby a particularly simple and compact construction is achieved for ventilating or venting the control volume through the bore and controlled by the first control valve.
  • the safety measure consists in putting the pneumatic nailer into a locked state in which no driving process can be triggered.
  • the pneumatic nailer can have a locking piston that mechanically engages in a sequence required to trigger a driving process, for example by preventing a displacement of an actuator of a pilot valve.
  • the blocked state can be established by using a shut-off valve to shut off the compressed air nailer from a compressed air supply and / or to completely vent it.
  • a control line which has to be ventilated or vented to trigger a driving process, is opened or shut off 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 release mode and in a single release mode, and the safety measure consists in the pneumatic nailer being switched from the contact release mode to the single release mode. As explained at the outset, this measure can also improve the operational reliability of the pneumatic nailer. After the pneumatic nailer has been switched to single release mode, contact release is not possible. Instead, a single trigger must first be carried out, which is usually only possible again if the trigger has been released beforehand.
  • the pneumatic nailer has a locking sleeve which can be displaced 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 safety measure can essentially consist in the locking sleeve being shifted into the locking position.
  • the locking sleeve can be integrated into a control valve arrangement which comprises the explained first control valve and / or the explained second control valve.
  • the locking sleeve can accommodate the explained second control valve in its interior.
  • the locking sleeve is acted upon by the pressure in the control volume.
  • 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 a further, pneumatically generated counterforce and / or the force of a spring.
  • the pneumatic nailer off Fig. 1 comprises a working piston 10 which is connected to a driving ram 12.
  • the working piston 10 is in a working cylinder 14 movably mounted. If compressed air is applied to it above the working piston 10, a fastening means (not shown) can be driven into a workpiece with the driving ram 12.
  • the main valve 16 is activated by a pilot valve 18.
  • the pilot valve 18 is in turn activated by a main control line 20. As soon as the main control line 20 is ventilated, the pilot valve 18 and subsequently the main valve 16 switches and a driving process is triggered.
  • the in Fig. 1 Elements shown in cross section, which are collectively referred to as the control valve arrangement. They are responsible for controlling the pressure in the main control line 20 and thus for triggering driving processes. These elements include a first control valve 22, a second control valve 24, a trigger 26 and a touch-down sensor 28.
  • the cross-sectional view of the touch-down sensor 28 is shown in FIG Fig. 1 only one upper end shown.
  • the attachment sensor 24 additionally comprises a lower end 104, which is in the Fig. 1 is shown schematically and protrudes through an opening of a muzzle tool, not shown. Details of the control valve arrangement are based on the enlarged illustration of FIG Fig. 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 contact sensor 28 are not actuated and the pneumatic nailer is properly connected to a source of compressed air.
  • the housing interior 32 (which is also only partially shown), which is arranged within the housing 30, which can only be seen in sections, is then constantly under operating pressure.
  • the housing 30 goes on the right edge of the Fig. 2 into a grip section 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 touch-down sensor 28 interacts with a touch-down sensor lever 42 which is partially arranged within a recess of the trigger 26.
  • the placement sensor lever 42 is mounted on the housing 30 so as to be pivotable about an axis 44 fixed to the housing.
  • the front end of the touch-down sensor lever 42 is carried along by the rear end of the touch-down sensor 28 when the touch-down sensor 28 moves upwards relative to the housing 30 when the pneumatic nailer is applied 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 comprises a lower valve sleeve 50 and an upper valve sleeve 52.
  • a small bore 54 is arranged in the lower valve sleeve 50 in the transverse direction. This bore 54 has a diameter of approximately 70 ⁇ m and a length of approximately 200 ⁇ m. Because of these very small dimensions, the bore 54 is in the Fig. 2 not to scale, but somewhat enlarged.
  • the space 56 which is arranged inside the lower valve sleeve 50 and adjoins the bore 54, is continuously connected to outside air via a transverse bore 106 in the upper valve sleeve 52 and an obliquely arranged bore 108 in the housing 34. Another permanent connection between the space 56 and 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 the obliquely arranged bore 64 and a space 66 connected to it above a locking sleeve via the transverse bore 62 in the upper valve sleeve 52 68 surrounding the second control valve 24 is vented.
  • 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 an annular manner. 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 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 past the O-ring 74 is connected to outside air.
  • valve pin 48 of the second control valve 24 is displaced against the force of a spring 86 into its actuated, in Fig. 3 position shown in which the O-ring 74 is in seal.
  • the main control line 20 is shut off from outside air.
  • its upper O-ring 88 moves out of the seal, whereby a connection is established 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 yet trigger a driving process.
  • the valve pin 40 of the first control valve 22 is displaced into its actuated position and the lower O-ring 60 enters the seal and an upper O-ring 90 of the valve pin 40 moves out of the seal.
  • the control volume 72 is ventilated via a check valve formed by a central O-ring 92 on the valve sleeve 78.
  • the control volume 72 like the space 66, is accordingly under operating pressure. The three forces acting on the locking sleeve 68 continue to work together so that the locking sleeve 68 remains in its upper end position.
  • the attachment sensor 28 moves back down so that the valve pin 48 of the second control valve 24 also returns to its starting position, as in FIG Fig. 5 shown.
  • the upper O-ring 88 of the valve pin 48 moves into the seal again, so that no further compressed air supply to the main control line 20 or into the control volume 72 is possible.
  • the pressure in the control volume 72 is slowly reduced via the bore 54.
  • the main control line 20 is already on the Fig. 2 described connection with outside air vented.
  • a contact release can be made at any time because the main control line 20 can be ventilated again by moving the valve pin 48 upwards. At the same time, the pressure in the control volume 72 is then via the Check valve refreshed so that the delay time, within which a further contact release is possible, starts again.
  • the contact sensor 28 remains inactive for a certain period of time when the trigger 26 is actuated, the pressure in the control volume 72 falls below a predetermined pressure threshold. As a result, the balance of the three forces acting on the locking sleeve 68 changes, and the locking sleeve 68 comes into its in the Fig. 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 a supply of compressed air to the control volume 72 via the check valve is no longer possible.
  • the upper O-ring 76 comes into a seal on the valve sleeve 78 so that a supply of compressed air via the transverse bore 80 to the main control line 20 is no longer possible either.
  • Fig. 6 with 96 designated space connected to outside air via an invisible hole. Since a middle O-ring 98 is not in a seal on the locking sleeve 68, the main control line 20 is vented via the space 96. Moving the locking sleeve 68 into its locking position therefore represents a safety measure which reliably prevents the triggering of a further driving process. Further driving processes can only be triggered when the trigger 26 is released and the space 66 is thereby vented, so that the locking sleeve 68 shifts back into its open position.
  • a second embodiment is based on Figs. 7 to 10 explained. With regard to the in Fig. 1 There are no differences to the first exemplary embodiment of FIG. 1 with regard to the elements shown schematically and with regard to the design of the second control valve 24 with locking sleeve 68 Figs. 1 to 6 . The elements that have been adopted unchanged are provided with the same reference numerals as in the first exemplary embodiment and are not explained again.
  • the touch-down sensor lever 42 the rear end of which is not fixed to the housing, but is hinged to a rear end of the trigger 26.
  • the valve pin 48 of the second control valve 24 is not activated every time the attachment sensor 28 is actuated, but only when the trigger 26 and the attachment sensor 28 are actuated together.
  • the space 66 above the locking sleeve 68 is not controlled by the first control valve 22 is ventilated, but is continuously connected to the housing interior 32 via a bore 100.
  • the changes mentioned compared to the first exemplary embodiment allow a particularly simple configuration of the first control valve 22.
  • This further comprises a lower valve sleeve 50 in which the bore 54 is arranged, as explained in more detail in relation to the first exemplary embodiment.
  • the first control valve 22 only fulfills the task of optionally ventilating or venting the control volume 72 via the bore 54.
  • the first control valve 22 is in its in Fig. 7 drawn, non-actuated position past the upper O-ring 102 a connection between the space 56 inside the lower valve sleeve 50 and the housing interior 32, while the lower O-ring 60 is in seal.
  • the control volume 72 is thus slowly ventilated through the bore 54.
  • the pneumatic nailer After a certain time has elapsed after the pneumatic nailer has been connected to a compressed air source and in which neither the trigger 26 nor the attachment sensor 28 have been actuated, the pneumatic nailer is in the Fig. 7 initial state shown.
  • the control volume 72 is under operating pressure and the locking sleeve 68 is in its open position.
  • Figure 8 shows the situation after actuation of the trigger 26.
  • the upper O-ring 102 of the valve pin 40 is in a seal and the control volume 72 is slowly vented via the bore 54. The delay time thus begins to run when the trigger 26 is actuated.
  • valve pin 48 of the second control valve 24 After the pneumatic nailer has been lifted from a workpiece, the valve pin 48 of the second control valve 24 returns to its inoperative position and the control volume 72 is slowly vented via the bore 54. As long as the pressure does not fall below the pressure threshold in the control volume 72, the locking sleeve 68 remains in its open position, so that the situation of those remains Fig. 8 corresponds. Another contact release is possible.
  • the locking sleeve 68 is displaced into its internal position Fig. 10 Locked position shown, whereby further releases are prevented in the same way as explained for the first embodiment.
  • the trigger 26 In order to enable a further triggering, the trigger 26 must first be released again and wait until the pressure in the control volume 72 exceeds the pressure threshold and the locking sleeve 68 is moved back into its open position. Then the device is back in the in Fig. 8 ready to trigger state shown.
  • the housing 30 has two recesses which receive the first control valve 22 and the second control valve 24, respectively.
  • the control volume 72 is located within the recess which the second control valve 24 receives.

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

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EP3760379A1 true EP3760379A1 (fr) 2021-01-06
EP3760379B1 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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US20050156008A1 (en) * 2004-01-20 2005-07-21 Yoshiichi Komazaki Pneumatically operated fastener driving tool
EP2767365A1 (fr) 2013-02-19 2014-08-20 Joh. Friedrich Behrens AG Cloueur à air comprimé avec déclencheur manuel et capteur de contact
DE102013106657A1 (de) 2013-06-25 2015-01-08 Illinois Tool Works Inc. Eintreibwerkzeug zum Eintreiben von Befestigungsmitteln in ein Werkstück
WO2019038124A1 (fr) 2017-08-23 2019-02-28 Joh. Friedrich Behrens Ag Cloueuse pneumatique à ensemble soupape de sécurité
EP3461592A1 (fr) * 2017-09-29 2019-04-03 Max Co., Ltd. Outil de commande

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TWI696527B (zh) * 2016-03-18 2020-06-21 鑽全實業股份有限公司 氣動工具的安全性擊發控制裝置
EP3257632A1 (fr) * 2016-06-15 2017-12-20 Joh. Friedrich Behrens AG Cloueur a air comprime comprenant un declenchement sequentiel et par contact
EP3479963B1 (fr) * 2017-11-01 2020-12-09 Joh. Friedrich Behrens AG Cloueur à air comprimé pourvu d'un système de soupape de sécurité

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3964659A (en) 1975-03-12 1976-06-22 Senco Products, Inc. Safety firing control means for a fluid operated tool
US20050156008A1 (en) * 2004-01-20 2005-07-21 Yoshiichi Komazaki Pneumatically operated fastener driving tool
EP2767365A1 (fr) 2013-02-19 2014-08-20 Joh. Friedrich Behrens AG Cloueur à air comprimé avec déclencheur manuel et capteur de contact
DE102013106657A1 (de) 2013-06-25 2015-01-08 Illinois Tool Works Inc. Eintreibwerkzeug zum Eintreiben von Befestigungsmitteln in ein Werkstück
WO2019038124A1 (fr) 2017-08-23 2019-02-28 Joh. Friedrich Behrens Ag Cloueuse pneumatique à ensemble soupape de sécurité
EP3461592A1 (fr) * 2017-09-29 2019-04-03 Max Co., Ltd. Outil de commande

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
EP3760379B1 (fr) 2022-01-12
JP2022540075A (ja) 2022-09-14
ES2904999T3 (es) 2022-04-06
WO2021001477A1 (fr) 2021-01-07
AU2020300007B2 (en) 2023-07-13
AU2020300007A1 (en) 2022-01-20

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