EP3697573B1 - Compressed air nail gun with a safety element - Google Patents
Compressed air nail gun with a safety element Download PDFInfo
- Publication number
- EP3697573B1 EP3697573B1 EP18773222.7A EP18773222A EP3697573B1 EP 3697573 B1 EP3697573 B1 EP 3697573B1 EP 18773222 A EP18773222 A EP 18773222A EP 3697573 B1 EP3697573 B1 EP 3697573B1
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- EP
- European Patent Office
- Prior art keywords
- compressed air
- safety
- control
- trigger
- pressure
- 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.)
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- 238000000034 method Methods 0.000 claims description 34
- 230000008569 process Effects 0.000 claims description 33
- 230000001960 triggered effect Effects 0.000 claims description 17
- 230000001419 dependent effect Effects 0.000 claims description 9
- 238000005273 aeration Methods 0.000 claims 1
- 230000000903 blocking effect Effects 0.000 description 14
- 238000009423 ventilation Methods 0.000 description 6
- 230000005540 biological transmission Effects 0.000 description 5
- 230000007246 mechanism Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 210000003746 feather Anatomy 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 101100390736 Danio rerio fign gene Proteins 0.000 description 1
- 101100390738 Mus musculus Fign gene Proteins 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25C—HAND-HELD NAILING OR STAPLING TOOLS; MANUALLY OPERATED PORTABLE STAPLING TOOLS
- B25C1/00—Hand-held nailing tools; Nail feeding devices
- B25C1/008—Safety devices
-
- 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 with a triggering device, a safety actuator that can be displaced between a blocking position and an open position and is designed to prevent a driving process from being triggered in the blocking position, a safety control chamber that is ventilated or vented via a throttle, the Pressure in the safety control chamber exerts an actuating force on the safety actuator, and means for generating a counterforce which acts on the safety actuator and is directed opposite to the actuating force.
- Known pneumatic nailers of this type can be used in two different operating modes. With the so-called single triggering, the pneumatic nailer is first placed on a workpiece, which actuates an attachment sensor. A trigger is then actuated by hand, thereby triggering a single driving process.
- the user With the so-called contact triggering, also known as “touching”, the user holds the trigger down while he is applying the pneumatic nailer to the workpiece.
- the touch probe When the workpiece is placed on the workpiece, the touch probe is activated and a drive-in process is triggered.
- the pneumatic nailer can be used repeatedly in quick succession, which enables very quick work, in particular if many fastening means 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 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 is to another, remotely located Workpiece changes, a drive-in process can be triggered if an object or part of the body accidentally touches the touch-down probe. For example, accidents can occur if a user (in disregard of important safety regulations) climbs a ladder with a pneumatic nailer, holds the trigger down and accidentally touches his leg with the touch probe.
- a pneumatic nailer with a control valve device and a pressure-controlled control valve for automatic operation has become known.
- the pressure-controlled control valve has an oscillating piston which swings back and forth when the trigger is permanently actuated, which leads to a continual driving in of fasteners. There is no safety mechanism that intervenes in this process in such a way that, despite proper actuation of the trigger, no driving process is triggered.
- a pneumatic nailer of the type mentioned is from the publication EP 2 767 365 A1 known.
- the safety actuator is a locking piston which, in the locking position, prevents a driving-in process from being triggered, in particular by engaging in an adjustment path of a pilot valve piston.
- the means for generating a counterforce consist of a spring which presses the locking piston into an open position.
- the safety control chamber is slowly ventilated via a throttle when a control valve coupled to the trigger is actuated. If the pressure in the safety control chamber exceeds a specified pressure threshold, the locking piston is shifted into the locking position against the force of the spring, so that (further) triggering is not possible.
- this time control is used to limit a period in which a contact can be triggered after a previous trigger. After the period has expired, the pneumatic nailer is locked until the trigger is released, the pressure in the safety control chamber has reached its initial state again and the locking piston has returned to the open position.
- the safety actuator is a small piston that changes the position of a rocker integrated in a release device.
- the safety actuator is a sleeve disposed around a valve pin. In both cases, the safety actuator is displaced by a pressure in a safety control chamber against the force of a spring.
- the object of the invention is to provide a pneumatic nailer with an improved 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.
- Both the drive and the control of the pneumatic nailer can be done completely pneumatically, a supply of electrical energy is therefore not necessary.
- "Venting” always means that a connection to a pressureless room, in particular to the outside air, is established.
- Vehicleation always means that a connection is made to a room carrying compressed air.
- the release device has a manually operated release, for example in the form of a toggle or slide switch. It can also have an attachment sensor.
- the attachment sensor is in particular a mechanical component that protrudes beyond the front end of a muzzle tool and is held in this position by a spring until the pneumatic nailer is attached to a workpiece. Then the touch-down sensor is against the direction of the spring force and against the driving direction relocated.
- at least one control valve is actuated with the triggering device. Depending on the design, it may be necessary to actuate the trigger and the touch-up sensor together, possibly also in a specific sequence.
- the safety actuator can be moved between an open position and a locked position. In the open position, a driving process can be triggered by properly actuating the triggering device. If the triggering device comprises, for example, a manually operated trigger and a touch-down sensor, the joint actuation of which leads to the actuation of a control valve, which pressurizes the working piston, possibly with the involvement of further valves, then this sequence takes place when the triggering device is properly operated.
- the safety actuator can always be in its open position. In this respect, it does not take an active part in the release and drive-in process.
- the safety actuator if it is in its locked position, it prevents a drive-in process from being triggered.
- the safety actuator intervenes in the triggering and driving process in such a way that proper actuation of the triggering device does not trigger a driving process.
- the safety actuator can interrupt a mechanical chain of action between the triggering device and a control valve activated by the triggering device, for example by canceling a mechanical engagement between a touch-down sensor and an actuating element that acts on the control valve.
- the safety actuator can perform a valve function.
- it in the blocking position, it can, for example, shut off a line that is to be ventilated or vented to trigger a driving process.
- this line In the open position of the Safety actuator, this line can be open or be connected to a control valve arrangement.
- the safety actuator can perform a locking function, for example by blocking a pressure-actuated valve actuator or limiting its adjustment path.
- the position in which the safety actuator is located depends largely on the relationship between the actuating force and the counterforce, the magnitude of the actuating force depending on the pressure in the safety control chamber. It changes over time as a result of air flowing into or escaping from the safety control chamber via the throttle.
- the inventors have recognized that the time course of this pressure change in the safety control chamber depends on the current operating pressure and that this, in conjunction with a counterforce exerted by a spring and not dependent on the operating pressure, leads to fluctuations in the time it takes for the safety actuator to move into the blocking position elapses. This can have the consequence, for example, that at a relatively low operating pressure, successive contact releases are possible in a time cycle of 5 seconds, because the safety actuator only moves into the locked position after 5.1 seconds.
- the invention provides a remedy here in that the means for generating the counterforce are designed in such a way that the magnitude of the counterforce is linearly dependent on an operating pressure of the pneumatic nailer.
- the actuating force and the counterforce are equally affected by fluctuations in the operating pressure.
- the pressure threshold of the The pressure in the safety control chamber which must be exceeded in order to overcome the counterforce, is also dependent on the operating pressure.
- the time until the pressure threshold is exceeded remains largely independent of the operating pressure.
- the pneumatic nailer always reacts in the usual way, even with considerable fluctuations in the operating pressure.
- the period of time in which a further release is possible after a release remains largely constant.
- the means for generating a counterforce are designed so that the size of the counterforce is in the range from 10% to 90% of the actuating force when there is operating pressure in the safety control chamber.
- the magnitude of the counterforce is preferably in the range from 30% to 70% of the actuating force when there is operating pressure in the safety control chamber.
- the counterforce which is linearly dependent on the operating pressure, thus reaches a size that corresponds to the actuating force at a medium pressure in the safety control chamber. Any other forces that act on the safety actuator and that depend non-linearly on the operating pressure, for example weight forces or elastic forces, therefore have no significant influence on the position of the safety actuator and on the time until the safety actuator is shifted.
- the means for generating a counterforce have a control chamber, the pressure in the control chamber acting on the safety actuator. Regardless of how the pressure is generated in the control room in detail, its size fluctuates with the operating pressure. It is therefore a particularly simple solution to generate a counterforce that is linearly dependent on the operating pressure.
- the pressure in the safety control chamber acts on a first effective area of the safety actuator and the pressure in the control chamber acts on a second effective area of the safety actuator, the second effective area is smaller than the first effective area.
- the size of the second effective area is in the range from 10% to 90% of the size of the first effective area.
- the size of the second effective area can be in the range from 30% to 90% of the size of the first effective area. This ensures that even if additional forces not dependent on the operating pressure act on the safety actuator, the position of the safety actuator is largely determined by the pressures in the safety control chamber and in the control room.
- the compressed air nailer can have a compressed air connection via which it is supplied with a specific operating pressure. If there is a constant connection between the compressed air connection and the control room, there is always operating pressure in the control room. The counterforce is then only dependent on the operating pressure, not on an operating state of the pneumatic nailer.
- a spring which exerts an additional force on the safety actuator.
- the additional force can act in the direction of the actuating force or in the direction of the counterforce. Since it is exercised by a spring, it is independent of the operating pressure. It can therefore preferably be selected to be relatively small, for example less than 10% of the actuating force that is exerted by the pressure in the safety control chamber when operating pressure prevails in the safety control chamber.
- the advantage of the spring is that the safety actuator is moved into a preferred position when the pneumatic nailer is not connected to a compressed air supply. This ensures a defined initial state when the pneumatic nailer is started up. If the preferred position is the locked position, moves the safety actuator at least once each time the pneumatic nailer is used, which counteracts the seizing of the safety actuator.
- the triggering device has a trigger and an attachment sensor which, when actuated together, can control a first control valve and trigger a driving process, the safety actuator being designed to cancel a mechanical engagement between the triggering device and the control valve in the blocking position.
- the trigger and the touch-down sensor can be coupled via a mechanical actuating element such as a rocker and the safety actuator can cancel an engagement between the touch-down sensor and the mechanical actuating element in the locked position and establish / allow it in the open position.
- the pneumatic nailer has a first control line, the ventilation of which triggers a driving process, the safety actuator being designed to shut off a connecting line between the first control line and the triggering device in the blocking position.
- the connecting line can be continuous.
- the safety actuator thus performs a valve function.
- the triggering device has a trigger and an attachment sensor which, when actuated together, trigger a first control valve and trigger a driving process if the pressure in the safety control chamber is above a pressure threshold, and a second control valve which, when the trigger is actuated, is independent of actuation of the attachment sensor, the safety control chamber being continuously vented via the throttle regardless of the position of the second control valve and being separated from a pressurized housing interior when the second control valve is activated.
- the second control valve is activated when the trigger is actuated independently of an actuation of the touch-down sensor, that is, every time the Trigger.
- a control pin of the second control valve can be arranged in such a way that it is displaced from its rest position each time the trigger is actuated.
- a small air flow always escapes via the throttle. This can be heard acoustically and indicates to a user that the pneumatic nailer is ready for operation and that a contact can be triggered if necessary.
- the safety control chamber is no longer ventilated and the operating noise quickly decreases until it stops. This indicates to the user that the trigger must first be released for a further trigger.
- an opening cross-section of the throttle is dimensioned such that the actuating force falls below the counterforce after a period of time in the range from 1 second to 10 seconds after activation of the second control valve. At this moment, the safety actuator is moved into the locked position.
- said period of time can be in the range from 2 seconds to 6 seconds, preferably around 4 seconds.
- a check valve via which the safety control chamber is ventilated when a driving-in process is triggered. This measure leads to a reset of the pressure in the safety control chamber regardless of the actuation of the triggering device. The period in which a further trip is possible begins again.
- the pneumatic nailer 10 has a handle 12 which is fastened to a lower housing part 140 which is closed at the top by a housing cap 142.
- the compressed air rod 10 has an attachment sensor 24 which protrudes downward by a few millimeters over the mouth 26 of a mouth tool 28. If the pneumatic nailer 10 is applied to a workpiece, the attachment sensor 24 is displaced upwards against the force of a spring (not shown) until it is flush with the mouth 26 or only protrudes slightly beyond the mouth 26.
- the touch-down sensor 24 is mechanically coupled to a force transmission element 30 which moves with the movement of the touch-down sensor 24 upwards.
- the muzzle tool 28 has a receptacle 46, each of which is supplied with a fastening means from a magazine 48. From this position within the receptacle 46, the fastening means - for example a nail, a pin or a clamp - is driven in by a driving ram 50 which is connected to a working piston 52 of the pneumatic nailer 10. For this purpose, the working piston 52 is guided in a working cylinder 54. A main valve 56 is arranged above and sealingly closing the working cylinder 54, to the right of it a pilot valve 58 which controls the main valve 56. Details of these elements as well as the related function of the device are shown on the basis of the enlarged section of the Figure 2 explained in more detail.
- the pilot valve 58 is best in the Figure 2 recognizable. It has a control piston 94 which is guided in a guide sleeve 96. The lower end of the control piston 94 is sealed with a lower O-ring 100 with respect to the guide sleeve 96.
- a first control line 82 which is connected to a working volume of the pilot valve 58, is vented and the control piston 94 is in the lower position shown. It is held in this position by the force of a spring 102.
- control piston 94 has a middle O-ring 104 and an upper O-ring 106.
- the upper O-ring 106 seals the control piston 94 against the guide sleeve 96 and closes a connection to a ventilation opening, not shown, which is connected to outside air.
- the middle O-ring 104 is not in a seal, so that a main control line 110 is connected to the housing interior 64 via a radial bore 112 in the guide sleeve 96 and the annular gap 70 between the control piston 94 and guide sleeve 96 past the middle O-ring 104.
- the main control line 110 is connected to the space 72, which opens into the radial bore 112, via a connection not visible in the sectional plane shown.
- the housing interior 64 is ventilated in the initial state of the pneumatic nailer 10, i. H. connected to a compressed air connection (not shown) and under operating pressure.
- the main control line 110 is connected to a space 114 above a main valve actuator 116 of the main valve 56, so that the main valve actuator 116 is subjected to a downward force and thereby the upper edge of the working cylinder 54 by means of an O-ring 118 opposite the housing interior 64 seals.
- the main valve actuator 116 is acted upon by a spring 120 with a force in the direction of the position shown, which closes the working cylinder 54.
- a driving-in process is triggered by venting the first control line 82 in that the control piston 94 is displaced upwards so that the middle O-ring 104 comes into the seal and the upper O-ring 106 moves out of the seal.
- the connection between the main control line 110 and the housing interior 64 is blocked and a connection between the main control line 110 and a ventilation opening (not shown) is established.
- the space 114 above the main valve actuator 116 is vented via the vent opening and the main valve actuator 116 is displaced upwards against the force of the spring 120 by the pressure on its lower, outer annular surface 122 in the housing interior 64.
- compressed air flows out of the housing interior 64 into the working cylinder 54 above the working piston 52 and drives the working piston 52 downwards.
- the driving ram 50 connected to the working piston 52 drives a fastening means.
- a release device which is shown in Fig. 1 is covered by an area surrounded by a dashed line. Details of the release mechanism are based on the Figures 3 to 6 explained in more detail.
- the trigger 14 is mounted pivotably about a pivot axis 16 in a position on the housing of the pneumatic nailer 10 that is easy to grip.
- the trigger 14 has a button 18 which, when the trigger 14 is actuated, displaces a switching pin 20 of a second control valve 22 upwards. This activation of the second control valve 22 takes place each time the trigger 14 is actuated, regardless of the position of the contact sensor 24.
- the force transmission element 30 of the attachment sensor 24 is movably guided on the housing of the pneumatic nailer 10 and for this purpose has an elongated hole 32 through which a guide pin 98 is passed.
- the attachment sensor 24 the force transmission element 30 is displaced from the position shown in FIG Fig. 3 Drawn starting position upwards and thereby takes the free end of a rocker 36 with it, the fixed end of which is hinged about a pivot axis 38 in the interior of the trigger 14 and near its free end.
- the rocker 36 is then arranged approximately parallel to a longitudinal direction of the trigger 14 and its upper side acts as a button 40 which, when the contact sensor 24 and the trigger 14 are operated together, moves a switching pin 42 of a first control valve 44 upwards and thus controls the first control valve 44 .
- the first control line 82 which leads to the pilot control valve 58, can be seen at the top left.
- a safety actuator 34 is shown, which performs a valve function.
- the safety actuator 34 is displaceable between an open position and a blocking position. In the Fig. 3 it is drawn in its open position.
- the safety actuator 34 is guided in a sleeve 66 and has a central section 68. In the area of the middle section 68, the sleeve 66 has a radial bore 60. At the lower end of the middle section 68, the safety actuator 34 has a lower piston section 74, which is sealed with an O-ring 76 from a cylindrical space. The part of this cylindrical space located below the piston section 74 forms a safety control chamber 62. The pressure prevailing in the safety control chamber 62 exerts an actuating force on the lower piston section 74 and thus on the safety actuator 34 and tries to move it into its open position or in it to keep. The safety control chamber 62 is connected to outside air via a throttle 86.
- the safety actuator 34 has an upper piston section 78, which is likewise guided in a cylindrical space and is sealed off from this with an O-ring 80.
- the upper piston section 78 is manufactured as a separate part and rests on the lower piston section 74.
- the part of the cylindrical space arranged above the upper piston section 78 forms a control space 84 which is permanently connected to a housing interior 64.
- the housing interior 64 is ventilated.
- the operating pressure prevailing in the control chamber 84 thereby exerts a counterforce on the upper piston section 78 and thus on the safety actuator 34. This counterforce is directed opposite to the actuating force and tries to move the safety actuator 34 into its blocking position.
- the second control valve 22 is not actuated.
- the two O-rings 90, 92 of the second control valve 22 are not sealed, so that a line 124 leading to the first control valve 44 is connected to the housing interior 64 via the second control valve 22.
- the air flows from the line 124 through an annular gap 126 which surrounds a sleeve 88 of the second control valve 44, and a bore 128 in the safety control chamber 62. Because the amount of air escaping at the same time via the throttle 86 compared to this The inflow is negligible, there is always essentially operating pressure in the initial state in the safety control chamber 62.
- the actuating force exerted on the safety actuator 34 by the pressure in the safety control chamber 62 is greater than the counterforce exerted by the operating pressure in the control chamber 84.
- the safety actuator 34 therefore remains in its open position.
- the first control line 82 is connected to a line 134 leading to the first control valve 44 via a radial bore 132 in the central section 68 of the safety actuator 34 and an annular gap 130, as well as the radial bore 68 in the sleeve 66. Since an O-ring 136 of the first control valve 44 is not in a seal in the non-actuated position of the first control valve 44, the line 134 via the first control valve 44 is with it Outside air connected. At the same time, the O-ring 138 of the first control valve 44 is in a seal and separates the line 134 from the housing interior 64.
- Fig. 4 the trigger 14 was actuated and with it the second control valve 22. It can be seen that the switching pin 20 of the second control valve 22 has shifted upwards.
- the O-ring 90 is now in a seal and separates the housing interior 64 from the line 124. This ends the air supply to the safety control chamber 62, so that the pressure in the safety control chamber 62 slowly decreases due to the air escaping via the throttle 86.
- the O-ring 92 is also in a seal. In the event of a leak in the O-ring 90, it prevents a leakage flow from flowing to the line 124. Instead, such a leakage flow is discharged to the outside via the transverse bore 146 located between the two O-rings 90, 92 in the valve pin 20.
- Another O-ring 158 of the second control valve 22 is still in a seal, so that the line 124 is separated from outside air when the second control valve 22 is actuated.
- Another effect of the ventilation of the line 134 is that through the annular gap 130, the radial bore 132 and an axial bore 148, which extends centrally over a large part of the length through the safety actuator 34, as well as through a further radial bore 150 in the safety actuator 34 and the O-ring 152 acting as a check valve ventilates the safety control chamber 62 will.
- the pressure in the safety control chamber 62 is, as it were, refreshed, so that the period of time in which a further contact release is possible begins anew.
- the contact sensor 24 If the contact sensor 24 is not actuated within this period, the pressure in the safety control chamber 62 finally drops so far that the counterforce outweighs the actuating force and the safety actuator 34 moves into its blocking position. This is in Fig. 6 shown. If the contact sensor 24 and with it the first control valve 44 are now actuated again, the line 134 is ventilated again. However, because of the two sealed O-rings 154, 156 on the central section 68 of the safety actuator 34, this has no consequences. In the blocking position, the safety actuator 34 blocks the line 134 from both the first control line 82 and from the safety control chamber 62. A further driving process can therefore only be triggered again when the trigger 14 is released and the pressure in the safety control chamber 62 is restored via the second control valve 22, so that the safety actuator is shifted into its open position.
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- Fluid Mechanics (AREA)
- Portable Nailing Machines And Staplers (AREA)
Description
Die Erfindung betrifft einen Druckluftnagler mit einer Auslöseeinrichtung, einem Sicherheitsstellglied, das zwischen einer Sperrstellung und einer Offenstellung verlagerbar und dazu ausgebildet ist, in der Sperrstellung das Auslösen eines Eintreibvorgangs zu verhindern, einer Sicherheitssteuerkammer, die über eine Drossel be- oder entlüftet wird, wobei der Druck in der Sicherheitssteuerkammer eine Stellkraft auf das Sicherheitsstellglied ausübt, und Mitteln zum Erzeugen einer Gegenkraft, die auf das Sicherheitsstellglied einwirkt und der Stellkraft entgegengesetzt gerichtet ist.The invention relates to a pneumatic nailer with a triggering device, a safety actuator that can be displaced between a blocking position and an open position and is designed to prevent a driving process from being triggered in the blocking position, a safety control chamber that is ventilated or vented via a throttle, the Pressure in the safety control chamber exerts an actuating force on the safety actuator, and means for generating a counterforce which acts on the safety actuator and is directed opposite to the actuating force.
Bekannte Druckluftnagler dieser Art können in zwei unterschiedlichen Betriebsarten eingesetzt werden. Bei der sogenannten Einzelauslösung wird der Druckluftnagler zunächst an ein Werkstück angesetzt, wodurch ein Aufsetzfühler betätigt wird. Nachfolgend wird von Hand ein Auslöser betätigt und dadurch ein einzelner Eintreibvorgang ausgelöst.Known pneumatic nailers of this type can be used in two different operating modes. With the so-called single triggering, the pneumatic nailer is first placed on a workpiece, which actuates an attachment sensor. A trigger is then actuated by hand, thereby triggering a single driving process.
Bei der sogenannten Kontaktauslösung, auch als "Touchen" bezeichnet, hält der Benutzer den Auslöser bereits gedrückt, während er den Druckluftnagler an das Werkstück ansetzt. Beim Ansetzen an das Werkstück wird der Aufsetzfühler betätigt und dadurch ein Eintreibvorgang ausgelöst. Der Druckluftnagler kann wiederholt in schneller Folge angesetzt werden, was ein sehr schnelles Arbeiten ermöglicht, insbesondere wenn für eine ausreichende Befestigung viele Befestigungsmittel eingetrieben werden müssen, an deren Positioniergenauigkeit nur geringe Anforderungen gestellt werden.With the so-called contact triggering, also known as "touching", the user holds the trigger down while he is applying the pneumatic nailer to the workpiece. When the workpiece is placed on the workpiece, the touch probe is activated and a drive-in process is triggered. The pneumatic nailer can be used repeatedly in quick succession, which enables very quick work, in particular if many fastening means have to be driven in for adequate fastening, the positioning accuracy of which is subject to only minor requirements.
In bestimmten Situationen geht von dem Kontaktauslöseverfahren jedoch ein erhöhtes Verletzungsrisiko aus. Hält der Benutzer den Auslöser beispielsweise nicht nur dann gedrückt, wenn er den Druckluftnagler auf ein und demselben Werkstück in einem Abstand von einigen Zentimetern vom zuletzt eingetriebenen Befestigungsmittel aufsetzen will, sondern auch dann, wenn er zu einem anderen, entfernt angeordnetem Werkstück wechselt, kann bei einer unbeabsichtigten Berührung eines Gegenstands oder Körperteils mit dem Aufsetzfühler ein Eintreibvorgang ausgelöst werden. Beispielsweise kann es zu Unfällen kommen, wenn ein Benutzer (unter Missachtung wichtiger Sicherheitsvorschriften) mit dem Druckluftnagler auf eine Leiter steigt, dabei den Auslöser gedrückt hält und versehentlich mit dem Aufsetzfühler sein Bein streift.In certain situations, however, the contact release method increases the risk of injury. If the user keeps the 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 is to another, remotely located Workpiece changes, a drive-in process can be triggered if an object or part of the body accidentally touches the touch-down probe. For example, accidents can occur if a user (in disregard of important safety regulations) climbs a ladder with a pneumatic nailer, holds the trigger down and accidentally touches his leg with the touch probe.
Aus der Druckschrift
Ein Druckluftnagler des eingangs genannten Typs ist aus der Druckschrift
Aus der Druckschrift
Davon ausgehend ist es die Aufgabe der Erfindung, einen Druckluftnagler mit einem verbesserten Sicherheitsmechanismus zur Verfügung zu stellen.Based on this, the object of the invention is to provide a pneumatic nailer with an improved safety mechanism.
Diese Aufgabe wird gelöst durch den Druckluftnagler mit den Merkmalen des Anspruchs 1. Vorteilhafte Ausgestaltungen sind in den sich anschließenden Unteransprüchen angegeben.This object is achieved by the pneumatic nailer with the features of claim 1. Advantageous embodiments are specified in the subsequent subclaims.
Der Druckluftnagler hat
- einen Arbeitskolben, der mit einem Eintreibstößel zum Eintreiben eines Befestigungsmittels verbunden ist und beim Auslösen eines Eintreibvorgangs mit Druckluft beaufschlagt wird,
- einer Auslöseeinrichtung zum Auslösen eines Eintreibvorgangs,
- einem Sicherheitsstellglied, das zwischen einer Sperrstellung und einer Offenstellung verlagerbar und dazu ausgebildet ist, in der Sperrstellung das Auslösen eines Eintreibvorgangs zu verhindern,
- einer Sicherheitssteuerkammer, die über eine Drossel be- oder entlüftet wird, wobei der Druck in der Sicherheitssteuerkammer eine Stellkraft auf das Sicherheitsstellglied ausübt,
- Mittel zum Erzeugen einer Gegenkraft, die auf das Sicherheitsstellglied einwirkt und der Stellkraft entgegengesetzt gerichtet ist, wobei
- die Mittel zum Erzeugen einer Gegenkraft so ausgebildet sind, dass die Größe der Gegenkraft linear von einem Betriebsdruck des Druckluftnaglers abhängig ist.
- a working piston which is connected to a driving ram for driving in a fastener and which is acted upon with compressed air when a driving process is triggered,
- a triggering device for triggering a driving process,
- a safety actuator which can be displaced between a blocking position and an open position and is designed to prevent a drive-in process from being triggered in the blocking position,
- a safety control chamber that is pressurized or deflated via a throttle, whereby the pressure in the safety control chamber exerts an actuating force on the safety actuator,
- Means for generating a counterforce which acts on the safety actuator and is directed opposite to the actuating force, wherein
- the means for generating a counterforce are designed such that the magnitude of the counterforce is linearly dependent on an operating pressure of the pneumatic nailer.
Der Druckluftnager wird zum Eintreiben von Befestigungsmitteln wie Nägeln, Stiften oder Klammern verwendet. Hierzu kann der Druckluftnagler ein Magazin für die Befestigungsmittel aufweisen, aus dem jeweils ein Befestigungsmittel einer Aufnahme eines Mündungswerkzeugs des Druckluftnaglers zugeführt wird.The pneumatic rod is used to drive fasteners such as nails, pins or staples. For this purpose, 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.
Sowohl der Antrieb als auch die Steuerung des Druckluftnaglers können vollständig pneumatisch erfolgen, eine Versorgung mit elektrischer Energie ist daher nicht erforderlich. Mit "Entlüften" ist stets gemeint, dass eine Verbindung zu einem drucklosen Raum, insbesondere zur Außenluft, hergestellt wird. Mit "Belüften" ist stets gemeint, dass eine Verbindung zu einem Druckluft führenden Raum hergestellt wird.Both the drive and the control of the pneumatic nailer can be done completely pneumatically, a supply of electrical energy is therefore not necessary. "Venting" always means that a connection to a pressureless room, in particular to the outside air, is established. "Ventilation" always means that a connection is made to a room carrying compressed air.
Beim Auslösen eines Eintreibvorgangs wird ein Arbeitskolben des Druckluftnaglers mit Druckluft beaufschlagt. Dabei treibt der Arbeitskolben einen Eintreibstößel an, der mit dem Arbeitskolben verbunden ist. Der Eintreibstößel trifft auf ein hinteres Ende des Befestigungsmittels in der Aufnahme des Mündungswerkzeugs auf und treibt das Befestigungsmittel in das Werkstück ein.When a drive-in process is triggered, compressed air is applied to a working piston of the pneumatic nailer. 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.
Die Auslöseeinrichtung hat einen handbetätigbaren Auslöser, beispielsweise in Form eines Kipp- oder Schiebetasters. Sie kann überdies einen Aufsetzfühler aufweisen. Der Aufsetzfühler ist insbesondere ein mechanisches Bauelement, das über das vordere Ende eines Mündungswerkzeugs übersteht und von einer Feder in dieser Stellung gehalten wird, bis der Druckluftnagler an ein Werkstück angesetzt wird. Dann wird der Aufsetzfühler entgegen der Richtung der Federkraft und entgegen der Eintreibrichtung verlagert. Um einen Eintreibvorgang auszulösen, wird mit der Auslöseeinrichtung mindestens ein Steuerventil betätigt. Je nach Ausführung kann hierfür eine gemeinsame Betätigung von Auslöser und Aufsetzfühler erforderlich sein, gegebenenfalls auch in einer bestimmten Reihenfolge.The release device has a manually operated release, for example in the form of a toggle or slide switch. It can also have an attachment sensor. The attachment sensor is in particular a mechanical component that protrudes beyond the front end of a muzzle tool and is held in this position by a spring until the pneumatic nailer is attached to a workpiece. Then the touch-down sensor is against the direction of the spring force and against the driving direction relocated. In order to trigger a driving process, at least one control valve is actuated with the triggering device. Depending on the design, it may be necessary to actuate the trigger and the touch-up sensor together, possibly also in a specific sequence.
Das Sicherheitsstellglied ist zwischen einer Offenstellung und einer Sperrstellung verlagerbar. In der Offenstellung ist das Auslösen eines Eintreibvorgangs durch ordnungsgemäße Betätigung der Auslöseeinrichtung möglich. Umfasst die Auslöseeinrichtung beispielsweise einen handbetätigbaren Auslöser und einen Aufsetzfühler, deren gemeinsame Betätigung zur Betätigung eines Steuerventils führt, das gegebenenfalls unter Einbeziehung weiterer Ventile den Arbeitskolben mit Druck beaufschlagt, so findet dieser Ablauf bei ordnungsgemäßer Betätigung der Auslöseeinrichtung statt. Das Sicherheitsstellglied kann sich dabei stets in seiner Offenstellung befinden. Insofern nimmt es an dem Auslöse- und Eintreibvorgang nicht aktiv teil.The safety actuator can be moved between an open position and a locked position. In the open position, a driving process can be triggered by properly actuating the triggering device. If the triggering device comprises, for example, a manually operated trigger and a touch-down sensor, the joint actuation of which leads to the actuation of a control valve, which pressurizes the working piston, possibly with the involvement of further valves, then this sequence takes place when the triggering device is properly operated. The safety actuator can always be in its open position. In this respect, it does not take an active part in the release and drive-in process.
Befindet sich das Sicherheitsstellglied hingegen in seiner Sperrstellung, verhindert es das Auslösen eines Eintreibvorgangs. Hierzu greift das Sicherheitsstellglied in den Auslöse- und Eintreibvorgang derart ein, dass eine ordnungsgemäße Betätigung der Auslöseeinrichtung keinen Eintreibvorgang auslöst. Dies kann auf unterschiedliche Weise geschehen. Beispielsweise kann das Sicherheitsstellglied eine mechanische Wirkkette zwischen Auslöseeinrichtung und einem von der Auslöseeinrichtung angesteuerten Steuerventil unterbrechen, zum Beispiel indem ein mechanischer Eingriff zwischen einem Aufsetzfühler und einem Betätigungselement, das auf das Steuerventil einwirkt, aufgehoben wird.On the other hand, if the safety actuator is in its locked position, it prevents a drive-in process from being triggered. For this purpose, the safety actuator intervenes in the triggering and driving process in such a way that proper actuation of the triggering device does not trigger a driving process. This can be done in different ways. For example, the safety actuator can interrupt a mechanical chain of action between the triggering device and a control valve activated by the triggering device, for example by canceling a mechanical engagement between a touch-down sensor and an actuating element that acts on the control valve.
Alternativ kann das Sicherheitsstellglied eine Ventilfunktion ausüben. Hierzu kann es in der Sperrstellung beispielsweise eine Leitung absperren, die zum Auslösen eines Eintreibvorgangs zu belüfteten oder zu entlüften ist. In der Offenstellung des Sicherheitsstellglied kann diese Leitung offen sein bzw. mit einer Steuerventilanordnung verbunden sein.Alternatively, the safety actuator can perform a valve function. For this purpose, in the blocking position, it can, for example, shut off a line that is to be ventilated or vented to trigger a driving process. In the open position of the Safety actuator, this line can be open or be connected to a control valve arrangement.
In einer weiteren Alternative kann das Sicherheitsstellglied eine Verriegelungsfunktion ausüben, beispielsweise indem es ein druckbetätigtes Ventilstellglied blockiert oder dessen Verstellweg begrenzt.In a further alternative, the safety actuator can perform a locking function, for example by blocking a pressure-actuated valve actuator or limiting its adjustment path.
In welcher Stellung sich das Sicherheitsstellglied befindet, hängt maßgeblich von dem Verhältnis zwischen Stellkraft und Gegenkraft ab, wobei die Größe der Stellkraft vom Druck in der Sicherheitssteuerkammer abhängt. Sie ändert sich mit der Zeit durch über die Drossel in die Sicherheitssteuerkammer einströmende oder aus der Sicherheitssteuerkammer entweichende Luft. Die Erfinder haben erkannt, dass der zeitliche Verlauf dieser Druckänderung in der Sicherheitssteuerkammer vom aktuellen Betriebsdruck abhängt und dass dies im Zusammenwirken mit einer von einer Feder ausgeübten, nicht vom Betriebsdruck abhängigen Gegenkraft zu Schwankungen der Zeitdauer führt, die bis zum Verlagern des Sicherheitsstellglieds in die Sperrstellung verstreicht. Dies kann beispielsweise zur Folge haben, dass bei relativ niedrigem Betriebsdruck aufeinanderfolgende Kontaktauslösungen in einem Zeittakt von 5 Sekunden möglich sind, weil das Sicherheitsstellglied erst nach 5,1 Sekunden in die Sperrstellung gelangt. Dies stellt unter Umständen ein Sicherheitsrisiko dar. Bei relativ hohem Betriebsdruck können hingegen aufeinanderfolgende Kontaktauslösungen in einem Zeittakt von 1,5 Sekunden nicht möglich sind, weil das Sicherheitsstellglied bereits nach 1,4 Sekunden in seine Sperrstellung gelangt. In diesem Fall kann ein effizientes Arbeiten im Kontaktauslösungsbetrieb unter Umständen nicht mehr erfolgen.The position in which the safety actuator is located depends largely on the relationship between the actuating force and the counterforce, the magnitude of the actuating force depending on the pressure in the safety control chamber. It changes over time as a result of air flowing into or escaping from the safety control chamber via the throttle. The inventors have recognized that the time course of this pressure change in the safety control chamber depends on the current operating pressure and that this, in conjunction with a counterforce exerted by a spring and not dependent on the operating pressure, leads to fluctuations in the time it takes for the safety actuator to move into the blocking position elapses. This can have the consequence, for example, that at a relatively low operating pressure, successive contact releases are possible in a time cycle of 5 seconds, because the safety actuator only moves into the locked position after 5.1 seconds. Under certain circumstances, this represents a safety risk. With a relatively high operating pressure, on the other hand, successive contact releases in a time cycle of 1.5 seconds are not possible because the safety actuator reaches its blocking position after 1.4 seconds. In this case, it may no longer be possible to work efficiently in the contact release mode.
Die Erfindung schafft hier Abhilfe, indem die Mittel zum Erzeugen der Gegenkraft so ausgebildet sind, dass die Größe der Gegenkraft linear von einem Betriebsdruck des Druckluftnaglers abhängig ist. Dadurch sind Stellkraft und Gegenkraft gleichermaßen von Schwankungen des Betriebsdrucks betroffen. Die Druckschwelle des Drucks in der Sicherheitssteuerkammer, die zum Überwinden der Gegenkraft überschritten werden muss, ist ebenfalls vom Betriebsdruck abhängig. Im Ergebnis bleibt die Zeitdauer bis zum Überschreiten der Druckschwelle weitgehend unabhängig vom Betriebsdruck. Dadurch reagiert der Druckluftnagler auch bei erheblichen Schwankungen des Betriebsdrucks stets in gewohnter Weise. Insbesondere bleibt der Zeitraum, in dem nach einer Auslösung eine weitere Auslösung möglich ist, weitgehend konstant.The invention provides a remedy here in that the means for generating the counterforce are designed in such a way that the magnitude of the counterforce is linearly dependent on an operating pressure of the pneumatic nailer. As a result, the actuating force and the counterforce are equally affected by fluctuations in the operating pressure. The pressure threshold of the The pressure in the safety control chamber, which must be exceeded in order to overcome the counterforce, is also dependent on the operating pressure. As a result, the time until the pressure threshold is exceeded remains largely independent of the operating pressure. As a result, the pneumatic nailer always reacts in the usual way, even with considerable fluctuations in the operating pressure. In particular, the period of time in which a further release is possible after a release remains largely constant.
In einer Ausgestaltung sind die Mittel zum Erzeugen einer Gegenkraft so ausgebildet, dass die Größe der Gegenkraft im Bereich von 10 % bis 90 % der Stellkraft liegt, wenn in der Sicherheitssteuerkammer Betriebsdruck herrscht. Vorzugsweise liegt die Größe der Gegenkraft im Bereich von 30 % bis 70 % der Stellkraft, wenn in der Sicherheitssteuerkammer Betriebsdruck herrscht. Die linear vom Betriebsdruck abhängige Gegenkraft erreicht somit eine Größe, die der Stellkraft bei einem mittleren Druck in der Sicherheitssteuerkammer entspricht. Etwaige weitere Kräfte, die auf das Sicherheitsstellglied einwirken und die nichtlinear vom Betriebsdruck abhängen, beispielsweise Gewichtskräfte oder elastische Kräfte, haben daher im Betrieb keinen maßgeblichen Einfluss auf die Stellung des Sicherheitsstellglieds und auf die Zeitdauer bis zu einer Verlagerung des Sicherheitsstellglieds.In one embodiment, the means for generating a counterforce are designed so that the size of the counterforce is in the range from 10% to 90% of the actuating force when there is operating pressure in the safety control chamber. The magnitude of the counterforce is preferably in the range from 30% to 70% of the actuating force when there is operating pressure in the safety control chamber. The counterforce, which is linearly dependent on the operating pressure, thus reaches a size that corresponds to the actuating force at a medium pressure in the safety control chamber. Any other forces that act on the safety actuator and that depend non-linearly on the operating pressure, for example weight forces or elastic forces, therefore have no significant influence on the position of the safety actuator and on the time until the safety actuator is shifted.
In einer Ausgestaltung weisen die Mittel zum Erzeugen einer Gegenkraft einen Steuerraum auf, wobei der Druck in dem Steuerraum auf das Sicherheitsstellglied einwirkt. Unabhängig davon, wie der Druck in dem Steuerraum im Einzelnen erzeugt wird, schwankt seine Größe mit dem Betriebsdruck. Es handelt sich somit um eine besonders einfache Lösung, eine linear vom Betriebsdruck abhängige Gegenkraft zu erzeugen.In one embodiment, the means for generating a counterforce have a control chamber, the pressure in the control chamber acting on the safety actuator. Regardless of how the pressure is generated in the control room in detail, its size fluctuates with the operating pressure. It is therefore a particularly simple solution to generate a counterforce that is linearly dependent on the operating pressure.
In einer Ausgestaltung wirken der Druck in der Sicherheitssteuerkammer auf eine erste effektive Fläche des Sicherheitsstellglieds und der Druck in dem Steuerraum auf eine zweite effektive Fläche des Sicherheitsstellglieds ein, wobei die zweite effektive Fläche kleiner ist als die erste effektive Fläche. Durch diese konstruktive Maßnahme wird sichergestellt, dass Stellkraft und Gegenkraft in einem geeigneten Verhältnis stehen.In one embodiment, the pressure in the safety control chamber acts on a first effective area of the safety actuator and the pressure in the control chamber acts on a second effective area of the safety actuator, the second effective area is smaller than the first effective area. This constructive measure ensures that the actuating force and counterforce are in a suitable ratio.
In einer Ausgestaltung liegt die Größe der zweiten effektiven Fläche im Bereich von 10 % bis 90 % der Größe der ersten effektiven Fläche. Insbesondere kann die Größe der zweiten effektiven Fläche im Bereich von 30 % bis 90 % der Größe der ersten effektiven Fläche liegen. Dadurch wird erreicht, dass auch bei Einwirkung zusätzlicher, nicht vom Betriebsdruck abhängiger Kräfte auf das Sicherheitsstellglied die Stellung des Sicherheitsstellglieds maßgeblich durch die Drücke in der Sicherheitssteuerkammer und in dem Steuerraum bestimmt wird.In one embodiment, the size of the second effective area is in the range from 10% to 90% of the size of the first effective area. In particular, the size of the second effective area can be in the range from 30% to 90% of the size of the first effective area. This ensures that even if additional forces not dependent on the operating pressure act on the safety actuator, the position of the safety actuator is largely determined by the pressures in the safety control chamber and in the control room.
In einer Ausgestaltung herrscht in dem Steuerraum stets Betriebsdruck, wenn der Druckluftnagler an eine Druckluftversorgung angeschlossen ist. Grundsätzlich kann der Druckluftnagler einen Druckluftanschluss aufweisen, über den er mit einem bestimmten Betriebsdruck versorgt wird. Besteht eine stetige Verbindung zwischen dem Druckluftanschluss und dem Steuerraum, herrscht in dem Steuerraum stets Betriebsdruck. Die Gegenkraft ist dann nur vom Betriebsdruck, nicht von einem Betriebszustand des Druckluftnaglers abhängig.In one embodiment, there is always operating pressure in the control room when the compressed air nailer is connected to a compressed air supply. In principle, the compressed air nailer can have a compressed air connection via which it is supplied with a specific operating pressure. If there is a constant connection between the compressed air connection and the control room, there is always operating pressure in the control room. The counterforce is then only dependent on the operating pressure, not on an operating state of the pneumatic nailer.
In einer Ausgestaltung ist eine Feder vorhanden, die eine zusätzliche Kraft auf das Sicherheitsstellglied ausübt. Die zusätzliche Kraft kann in Richtung der Stellkraft oder in Richtung der Gegenkraft wirken. Da sie von einer Feder ausgeübt wird, ist sie vom Betriebsdruck unabhängig. Sie kann daher vorzugsweise relativ klein gewählt werden, beispielsweise kleiner als 10 % der Stellkraft, die von dem Druck in der Sicherheitssteuerkammer ausgeübt wird, wenn in der Sicherheitssteuerkammer Betriebsdruck herrscht. Vorteil der Feder ist, dass das Sicherheitsstellglied bei nicht an eine Druckluftversorgung angeschlossenem Druckluftnagler in eine Vorzugsstellung verlagert wird. Dies sorgt für einen definierten Ausgangszustand bei Inbetriebnahme des Druckluftnaglers. Ist die Vorzugsstellung die Sperrstellung, bewegt sich das Sicherheitsstellglied bei jeder Benutzung des Druckluftnaglers mindestens einmal, was einem Festsetzen des Sicherheitsstellglieds entgegenwirkt.In one embodiment, there is a spring which exerts an additional force on the safety actuator. The additional force can act in the direction of the actuating force or in the direction of the counterforce. Since it is exercised by a spring, it is independent of the operating pressure. It can therefore preferably be selected to be relatively small, for example less than 10% of the actuating force that is exerted by the pressure in the safety control chamber when operating pressure prevails in the safety control chamber. The advantage of the spring is that the safety actuator is moved into a preferred position when the pneumatic nailer is not connected to a compressed air supply. This ensures a defined initial state when the pneumatic nailer is started up. If the preferred position is the locked position, moves the safety actuator at least once each time the pneumatic nailer is used, which counteracts the seizing of the safety actuator.
In einer Ausgestaltung weist die Auslöseeinrichtung einen Auslöser und einen Aufsetzfühler auf, die bei gemeinsamer Betätigung ein erstes Steuerventil ansteuern und einen Eintreibvorgang auslösen können, wobei das Sicherheitsstellglied dazu ausgebildet ist, in der Sperrstellung einen mechanischen Eingriff zwischen der Auslöseeinrichtung und dem Steuerventil aufzuheben. Insbesondere können Auslöser und Aufsetzfühler über ein mechanisches Betätigungselement wie eine Wippe gekoppelt sein und das Sicherheitsstellglied kann in der Sperrstellung einen Eingriff zwischen Aufsetzfühler und dem mechanischen Betätigungselement aufheben und in der Offenstellung herstellen/zulassen.In one embodiment, the triggering device has a trigger and an attachment sensor which, when actuated together, can control a first control valve and trigger a driving process, the safety actuator being designed to cancel a mechanical engagement between the triggering device and the control valve in the blocking position. In particular, the trigger and the touch-down sensor can be coupled via a mechanical actuating element such as a rocker and the safety actuator can cancel an engagement between the touch-down sensor and the mechanical actuating element in the locked position and establish / allow it in the open position.
In einer Ausgestaltung weist der Druckluftnagler eine erste Steuerleitung auf, deren Be- oder Entlüftung einen Eintreibvorgang auslöst, wobei das Sicherheitsstellglied dazu ausgebildet ist, in der Sperrstellung eine Verbindungsleitung zwischen der ersten Steuerleitung und der Auslöseeinrichtung abzusperren. In der Offenstellung kann die Verbindungsleitung durchgängig sein. In diesem Fall übt das Sicherheitsstellglied also eine Ventilfunktion aus.In one embodiment, the pneumatic nailer has a first control line, the ventilation of which triggers a driving process, the safety actuator being designed to shut off a connecting line between the first control line and the triggering device in the blocking position. In the open position, the connecting line can be continuous. In this case, the safety actuator thus performs a valve function.
In einer Ausgestaltung weist die Auslöseeinrichtung einen Auslöser und einen Aufsetzfühler, die bei gemeinsamer Betätigung ein erstes Steuerventil ansteuern und einen Eintreibvorgang auslösen, falls der Druck in der Sicherheitssteuerkammer oberhalb einer Druckschwelle liegt, und ein zweites Steuerventil auf, das bei einer Betätigung des Auslösers unabhängig von einer Betätigung des Aufsetzfühlers angesteuert wird, wobei die Sicherheitssteuerkammer unabhängig von der Stellung des zweiten Steuerventils fortlaufend über die Drossel entlüftet und bei Ansteuerung des zweiten Steuerventils von einem unter Druck stehenden Gehäuseinnenraum getrennt wird. Das zweite Steuerventil wird bei einer Betätigung des Auslösers unabhängig von einer Betätigung des Aufsetzfühlers angesteuert, also bei jeder Betätigung des Auslösers. Hierzu kann beispielsweise ein Steuerstift des zweiten Steuerventils so angeordnet sein, dass er bei jeder Betätigung des Auslösers aus seiner Ruhestellung verlagert wird. Ein Vorteil dieser Ausgestaltung ist, dass im Grundzustand des Druckluftnaglers, bei nicht betätigtem Auslöser, stets ein geringer Luftstrom über die Drossel entweicht. Dies ist akustisch wahrnehmbar und zeigt einem Benutzer an, dass der Druckluftnagler betriebsbereit ist und dass gegebenenfalls eine Kontaktauslösung erfolgen kann. Bei Betätigung des Auslösers wird die Sicherheitssteuerkammer nicht länger belüftet und das Betriebsgeräusch wird schnell leiser, bis es verstummt. Dies zeigt dem Benutzer an, dass für eine weitere Auslösung zunächst der Auslöser wieder losgelassen werden muss.In one embodiment, the triggering device has a trigger and an attachment sensor which, when actuated together, trigger a first control valve and trigger a driving process if the pressure in the safety control chamber is above a pressure threshold, and a second control valve which, when the trigger is actuated, is independent of actuation of the attachment sensor, the safety control chamber being continuously vented via the throttle regardless of the position of the second control valve and being separated from a pressurized housing interior when the second control valve is activated. The second control valve is activated when the trigger is actuated independently of an actuation of the touch-down sensor, that is, every time the Trigger. For this purpose, for example, a control pin of the second control valve can be arranged in such a way that it is displaced from its rest position each time the trigger is actuated. One advantage of this embodiment is that in the basic state of the pneumatic nailer, when the trigger is not actuated, a small air flow always escapes via the throttle. This can be heard acoustically and indicates to a user that the pneumatic nailer is ready for operation and that a contact can be triggered if necessary. When the trigger is pressed, the safety control chamber is no longer ventilated and the operating noise quickly decreases until it stops. This indicates to the user that the trigger must first be released for a further trigger.
In einer Ausgestaltung ist ein Öffnungsquerschnitt der Drossel so bemessen, dass die Stellkraft nach Ablauf eines Zeitraums im Bereich von 1 Sekunde bis 10 Sekunden nach Ansteuerung des zweiten Steuerventils die Gegenkraft unterschreitet. In diesem Moment wird das Sicherheitsstellglied in die Sperrstellung verlagert. Insbesondere kann der genannte Zeitraum im Bereich von 2 Sekunden bis 6 Sekunden, vorzugsweise bei etwa 4 Sekunden, liegen.In one embodiment, an opening cross-section of the throttle is dimensioned such that the actuating force falls below the counterforce after a period of time in the range from 1 second to 10 seconds after activation of the second control valve. At this moment, the safety actuator is moved into the locked position. In particular, said period of time can be in the range from 2 seconds to 6 seconds, preferably around 4 seconds.
In einer Ausgestaltung ist ein Rückschlagventil vorhanden, über das die Sicherheitssteuerkammer beim Auslösen eines Eintreibvorgangs belüftet wird. Diese Maßnahme führt unabhängig von der Betätigung der Auslöseeinrichtung zu einem Zurücksetzen des Drucks in der Sicherheitssteuerkammer. Der Zeitraum, in dem eine weitere Auslösung möglich ist, beginnt von neuem zu laufen.In one embodiment, there is a check valve via which the safety control chamber is ventilated when a driving-in process is triggered. This measure leads to a reset of the pressure in the safety control chamber regardless of the actuation of the triggering device. The period in which a further trip is possible begins again.
Nachfolgend wird die Erfindung anhand eines in Figuren dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:
- Fig. 1
- einen erfindungsgemäßen Druckluftnagler in einer teilweise geschnittenen Darstellung,
- Fig. 2
- eine vergrößerte Ansicht eines Ausschnitts aus
Figur 1 , der ein Hauptventil und ein Vorsteuerventil umfasst, - Fign. 3 bis 6
- einen in
Figur 1 verdeckten Ausschnitt mit einer Auslöseeinrichtung in unterschiedlichen Betriebszuständen.
- Fig. 1
- a pneumatic nailer according to the invention in a partially sectioned illustration,
- Fig. 2
- an enlarged view of a section
Figure 1 which includes a main valve and a pilot valve, - Figs. 3 to 6
- one in
Figure 1 concealed cutout with a release device in different operating states.
Zunächst werden anhand der
Der Druckluftnager 10 weist einen Aufsetzfühler 24 auf, der über die Mündung 26 eines Mündungswerkzeugs 28 um einige Millimeter nach unten übersteht. Wird der Druckluftnagler 10 an ein Werkstück angesetzt, wird der Aufsetzfühler 24 gegen die Kraft einer nicht gezeigten Feder nach oben verlagert, bis er bündig mit der Mündung 26 abschließt oder nur noch geringfügig über die Mündung 26 übersteht. Der Aufsetzfühler 24 ist mechanisch gekoppelt mit einem Kraftübertragungselement 30, das sich bei der Bewegung des Aufsetzfühlers 24 nach oben mitbewegt.The
Das Mündungswerkzeug 28 weist eine Aufnahme 46 auf, der jeweils ein Befestigungsmittel aus einem Magazin 48 zugeführt wird. Aus dieser Position innerhalb der Aufnahme 46 wird das Befestigungsmittel - beispielsweise ein Nagel, ein Stift oder eine Klammer - von einem Eintreibstößel 50, der mit einem Arbeitskolben 52 des Druckluftnaglers 10 verbunden ist, eingetrieben. Hierzu ist der Arbeitskolben 52 in einem Arbeitszylinder 54 geführt. Oberhalb des Arbeitszylinders 54 und diesen dichtend verschließend ist ein Hauptventil 56 angeordnet, rechts davon ein Vorsteuerventil 58, das das Hauptventil 56 steuert. Einzelheiten dieser Elemente sowie die damit zusammenhängende Funktion des Gerätes werden anhand der Ausschnittsvergrößerung der
Das Vorsteuerventil 58 ist am besten in der
Der Steuerkolben 94 weist zusätzlich zu dem unteren O-Ring 100 einen mittleren O-Ring 104 und einen oberen O-Ring 106 auf. In der gezeigten, unteren Stellung des Steuerkolbens 94 dichtet der obere O-Ring 106 den Steuerkolben 94 gegenüber der Führungshülse 96 ab und verschließt eine Verbindung zu einer nicht gezeigten Entlüftungsöffnung, die mit Außenluft verbunden ist. Der mittlere O-Ring 104 befindet sich nicht in Dichtung, sodass eine Hauptsteuerleitung 110 über eine radiale Bohrung 112 in der Führungshülse 96 und den Ringspalt 70 zwischen Steuerkolben 94 und Führungshülse 96 am mittleren O-Ring 104 vorbei mit dem Gehäuseinnenraum 64 verbunden ist. Die Hauptsteuerleitung 110 ist über eine in der gezeigten Schnittebene nicht sichtbare Verbindung mit dem Raum 72, der in die radiale Bohrung 112 mündet, verbunden. Der Gehäuseinnenraum 64 ist im Ausgangszustand des Druckluftnaglers 10 belüftet, d. h. mit einem nicht gezeigten Druckluftanschluss verbunden und unter Betriebsdruck stehend.In addition to the lower O-
Die Hauptsteuerleitung 110 ist mit einem Raum 114 oberhalb eines Hauptventil-Stellglieds 116 des Hauptventils 56 verbunden, sodass das Hauptventil-Stellglied 116 mit einer Kraft nach unten beaufschlagt wird und dadurch den oberen Rand des Arbeitszylinders 54 mittels eines O-Rings 118 gegenüber dem Gehäuseinnenraum 64 abdichtet. Zusätzlich wird das Hauptventil-Stellglied 116 von einer Feder 120 mit einer Kraft in Richtung der gezeigten, den Arbeitszylinder 54 verschließenden Stellung beaufschlagt.The
Ein Eintreibvorgang wird durch Belüften der ersten Steuerleitung 82 ausgelöst, indem der Steuerkolben 94 nach oben verlagert wird, sodass der mittlere O-Ring 104 in Dichtung gelangt und der obere O-Ring 106 aus der Dichtung fährt. Dadurch wird die Verbindung der Hauptsteuerleitung 110 zum Gehäuseinnenraum 64 abgesperrt und eine Verbindung zwischen Hauptsteuerleitung 110 und einer nicht gezeigten Entlüftungsöffnung wird hergestellt. Der Raum 114 oberhalb des Hauptventil-Stellglieds 116 wird über die Entlüftungsöffnung entlüftet und das Hauptventil-Stellglied 116 wird durch den an seiner unteren, äußeren Ringfläche 122 anstehenden, im Gehäuseinnenraum 64 herrschenden Druck gegen die Kraft der Feder 120 nach oben verlagert. Dadurch strömt Druckluft aus dem Gehäuseinnenraum 64 in den Arbeitszylinder 54 oberhalb des Arbeitskolbens 52 und treibt den Arbeitskolben 52 nach unten. Bei dieser Abwärtsbewegung treibt der mit dem Arbeitskolben 52 verbundene Eintreibstößel 50 ein Befestigungsmittel ein.A driving-in process is triggered by venting the
Unterhalb des Vorsteuerventils 58 befindet sich eine Auslöseeinrichtung, die in
Man erkennt dort, dass der Auslöser 14 in einer griffgünstigen Position am Gehäuse des Druckluftnaglers 10 um eine Schwenkachse 16 schwenkbar gelagert ist. Am oberen, hinteren Ende des Auslösers 14 weist dieser eine Schaltfläche 18 auf, die bei einer Betätigung des Auslösers 14 einen Schaltstift 20 eines zweiten Steuerventils 22 nach oben verlagert. Diese Ansteuerung des zweiten Steuerventils 22 erfolgt bei jeder Betätigung des Auslösers 14, unabhängig von der Stellung des Aufsetzfühlers 24.It can be seen there that the
Das Kraftübertragungselement 30 des Aufsetzfühlers 24 ist am Gehäuse des Druckluftnaglers 10 beweglich geführt und weist hierzu ein Langloch 32 auf, durch das ein Führungsstift 98 hindurchgeführt ist. Bei einer Betätigung des Aufsetzfühlers 24 verlagert sich das Kraftübertragungselement 30 aus der in
In der
Das Sicherheitsstellglied 34 ist in einer Hülse 66 geführt und weist einen mittleren Abschnitt 68 auf. Im Bereich des mittleren Abschnitts 68 hat die Hülse 66 eine radiale Bohrung 60. Am unteren Ende des mittleren Abschnitts 68 hat das Sicherheitsstellglied 34 einen unteren Kolbenabschnitt 74, der mit einem O-Ring 76 gegenüber einem zylindrischen Raum abgedichtet ist. Der unterhalb des Kolbenabschnitts 74 angeordnete Teil dieses zylindrischen Raums bildet eine Sicherheitssteuerkammer 62. Der in der Sicherheitssteuerkammer 62 herrschende Druck übt eine Stellkraft auf den unteren Kolbenabschnitt 74 und damit auf das Sicherheitsstellglied 34 aus und versucht, dieses in seine Offenstellung zu verlagern bzw. es darin zu halten. Die Sicherheitssteuerkammer 62 ist über eine Drossel 86 mit Außenluft verbunden.The
Am oberen Ende des mittleren Abschnitts 68 weist das Sicherheitsstellglied 34 einen oberen Kolbenabschnitt 78 auf, der ebenfalls in einem zylindrischen Raum geführt und gegenüber diesem mit einem O-Ring 80 abgedichtet ist. Der obere Kolbenabschnitt 78 ist als separates Teil gefertigt und liegt am unteren Kolbenabschnitt 74 an.At the upper end of the
Der oberhalb des oberen Kolbenabschnitts 78 angeordnete Teil des zylindrischen Raums bildet einen Steuerraum 84, der ständig mit einem Gehäuseinnenraum 64 verbunden ist. Sobald der Druckluftnagler 10 an eine Druckluftversorgung angeschlossen ist, ist der Gehäuseinnenraum 64 belüftet. Der in dem Steuerraum 84 herrschende Betriebsdruck übt dadurch eine Gegenkraft auf den oberen Kolbenabschnitt 78 und damit auf das Sicherheitsstellglied 34 aus. Diese Gegenkraft ist der Stellkraft entgegengesetzt gerichtet und versucht, das Sicherheitsstellglied 34 in seine Sperrstellung zu verlagern.The part of the cylindrical space arranged above the
Im in der
In diesem Fall ist die durch den Druck in der Sicherheitssteuerkammer 62 ausgeübte Stellkraft auf das Sicherheitsstellglied 34 größer als die vom Betriebsdruck im Steuerraum 84 ausgeübte Gegenkraft. Darum verbleibt das Sicherheitsstellglied 34 in seiner Offenstellung. In dieser Offenstellung ist die erste Steuerleitung 82 über eine radiale Bohrung 132 im mittleren Abschnitt 68 des Sicherheitsstellglieds 34 und einen Ringspalt 130 sowie die radiale Bohrung 68 in der Hülse 66 mit einer zum ersten Steuerventil 44 führenden Leitung 134 verbunden. Da sich ein O-Ring 136 des ersten Steuerventils 44 in der unbetätigten Stellung des ersten Steuerventils 44 nicht in Dichtung befindet, ist die Leitung 134 über das erste Steuerventil 44 mit Außenluft verbunden. Gleichzeitig befindet sich der O-Ring 138 des ersten Steuerventils 44 in Dichtung und trennt die Leitung 134 vom Gehäuseinnenraum 64.In this case, the actuating force exerted on the
In
Wird ausgehend von der Situation aus
Ein weiterer Effekt der Belüftung der Leitung 134 ist, dass über den Ringspalt 130, die radiale Bohrung 132 und eine axiale Bohrung 148, die sich mittig über einen Großteil der Länge durch das Sicherheitsstellglied 34 hindurch erstreckt, sowie durch eine weitere radiale Bohrung 150 im Sicherheitsstellglied 34 und den als Rückschlagventil wirkenden O-Ring 152 die Sicherheitssteuerkammer 62 belüftet wird. Der Druck in der Sicherheitssteuerkammer 62 wird gleichsam aufgefrischt, sodass der Zeitraum, in dem eine weitere Kontaktauslösung möglich ist, von neuem zu laufen beginnt.Another effect of the ventilation of the
Erfolgt innerhalb dieses Zeitraums keine Betätigung des Aufsetzfühlers 24, sinkt der Druck in der Sicherheitssteuerkammer 62 schließlich so weit ab, dass die Gegenkraft die Stellkraft überwiegt und das Sicherheitsstellglied 34 in seine Sperrstellung gelangt. Dies ist in
- 1010
- DruckluftnaglerPneumatic nailer
- 1212th
- HandgriffHandle
- 1414th
- Auslösertrigger
- 1616
- SchwenkachseSwivel axis
- 1818th
- Schaltflächebutton
- 2020th
- SchaltstiftSwitch pin
- 2222nd
- zweites Steuerventilsecond control valve
- 2424
- AufsetzfühlerAttachment sensor
- 2626th
- Mündungmouth
- 2828
- MündungswerkzeugMuzzle tool
- 3030th
- KraftübertragungselementPower transmission element
- 3232
- LanglochLong hole
- 3434
- SicherheitsstellgliedSafety actuator
- 3636
- WippeSeesaw
- 3838
- SchwenkachseSwivel axis
- 4040
- Schaltflächebutton
- 4242
- SchaltstiftSwitch pin
- 4444
- erstes Steuerventilfirst control valve
- 4646
- Aufnahmerecording
- 4848
- Magazinmagazine
- 5050
- EintreibstößelDriving ram
- 5252
- ArbeitskolbenWorking piston
- 5454
- ArbeitszylinderWorking cylinder
- 5656
- HauptventilMain valve
- 5858
- VorsteuerventilPilot valve
- 6060
- radiale Bohrungradial bore
- 6262
- SicherheitssteuerkammerSafety control chamber
- 6464
- GehäuseinnenraumHousing interior
- 6666
- HülseSleeve
- 6868
- mittlerer Abschnittmiddle section
- 7070
- RingspaltAnnular gap
- 7272
- Raumspace
- 7474
- unterer Kolbenabschnittlower piston section
- 7676
- O-RingO-ring
- 7878
- oberer Kolbenabschnittupper piston section
- 8080
- O-RingO-ring
- 8282
- erste Steuerleitungfirst control line
- 8484
- SteuerraumControl room
- 8686
- Drosselthrottle
- 8888
- HülseSleeve
- 9090
- O-RingO-ring
- 9292
- O-RingO-ring
- 9494
- SteuerkolbenControl piston
- 9696
- FührungshülseGuide sleeve
- 9898
- FührungsstiftGuide pin
- 100100
- unterer O-Ringlower O-ring
- 102102
- Federfeather
- 104104
- mittlerer O-Ringmiddle O-ring
- 106106
- oberer O-Ringupper O-ring
- 110110
- HauptsteuerleitungMain control line
- 112112
- radiale Bohrungradial bore
- 114114
- Raumspace
- 116116
- Hauptventil-StellgliedMaster valve actuator
- 118118
- O-RingO-ring
- 120120
- Federfeather
- 122122
- RingflächeRing surface
- 124124
- Leitungmanagement
- 126126
- RingspaltAnnular gap
- 128128
- Bohrungdrilling
- 130130
- RingspaltAnnular gap
- 132132
- radiale Bohrungradial bore
- 134134
- Leitungmanagement
- 136136
- O-RingO-ring
- 138138
- O-RingO-ring
- 140140
- O-RingO-ring
- 142142
- GehäusekappeHousing cap
- 144144
- radiale Bohrungradial bore
- 146146
- QuerbohrungCross hole
- 148148
- axiale Bohrungaxial bore
- 150150
- radiale Bohrungradial bore
- 152152
- O-RingO-ring
- 154154
- O-RingO-ring
- 156156
- O-RingO-ring
- 158158
- O-RingO-ring
Claims (12)
- A compressed air nailer (10) comprising:• a working piston (52) which is connected to a driving tappet (50) for driving in a fastening means and to which compressed air is applied when a driving process is triggered,• a triggering apparatus for triggering a driving process,• a safety actuator (34) that can be displaced between a locked position and an open position, and that, when in the locked position, is designed to interfere in a triggering and driving process so that a correct actuation of the triggering apparatus does not trigger a driving process,• a safety control chamber (62) which is aerated or deaerated by a throttle (86), wherein the pressure in the safety control chamber (62) exerts an actuating force on the safety actuator (34),• means for generating a counter force that acts on the safety actuator (34) and is directed in the opposite direction from the actuating force, wherein• the means for generating a counter force are designed such that the level of the counter force is linearly dependent on an operating pressure of the compressed air nailer (10).
- The compressed air nailer (10) according to claim 1, characterized in that the means for generating a counter force are designed such that the level of the counter force lies within a range of 10% to 90% of the actuating force when the operating pressure prevails in the safety control chamber (62).
- The compressed air nailer (10) according to claim 1 or 2, characterized in that the means for generating a counter force have a control space (84), wherein the pressure in the control space (84) acts on the safety actuator (34).
- The compressed air nailer (10) according to one of claims 1 to 3, characterized in that the pressure in the safety control chamber (62) acts on a first effective surface of the safety actuator (34), and the pressure in the control space (84) acts on a second effective surface of the safety actuator (34), wherein the second effective surface is smaller than the first effective surface.
- The compressed air nailer (10) according to claim 4, characterized in that the size of the second effective surface is within a range of 10% to 90% of the size of the first effective surface.
- The compressed air nailer (10) according to one of claims 3 to 5, characterized in that the operating pressure always prevails in the control space (84) when the compressed air nailer (10) is connected to a compressed air supply.
- The compressed air nailer (10) according to one of claims 1 to 6, characterized in that a spring exists that exerts an additional force on the safety actuator (34).
- The compressed air nailer (10) according to one of claims 1 to 7, characterized in that the triggering apparatus has a trigger (14) and a placing sensor (24) which, when actuated jointly, control a first control valve (44) and can trigger a driving process, wherein the safety actuator (34) is designed to release a mechanical engagement between the triggering apparatus and the first control valve (44) when in the locked position.
- The compressed air nailer (10) according to one of claims 1 to 7, characterized in that the compressed air nailer (10) has a first control line (82), the aeration or deaeration of which triggers a driving process, wherein the safety actuator (34), when in the locked position, is designed to block a connecting line between the first control line (82) and the triggering apparatus.
- The compressed air nailer (10) according to one of claims 1 to 7, characterized in that the triggering apparatus has a trigger (14) and a placing sensor (24) which, when jointly actuated, control a first control valve (44) and trigger a driving process if the pressure in the safety control chamber (62) lies above a given pressure threshold, and has a second control valve (22) that is controlled independent of an actuation the placing sensor (24) when the trigger (14) is actuated, wherein the safety control chamber (62) is continuously deaerated via the throttle (86) independent of the position of the second control valve (22) and is separated from a housing interior (64) that is under pressure when the second control valve (22) is controlled.
- The compressed air nailer (10) according to claim 10, characterized in that an opening cross-section of the throttle (86) is dimensioned such that the actuating force falls below the counter force after the expiration of a period within a range of 1 second to 10 seconds after the second control valve (22) is controlled.
- The compressed air nailer (10) according to one of claims 1 to 11, characterized by a non-return valve by means of which the safety control chamber (62) is aerated when the driving process is triggered.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PL18773222T PL3697573T3 (en) | 2017-10-18 | 2018-09-27 | Compressed air nail gun with a safety element |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP17197102.1A EP3473385A1 (en) | 2017-10-18 | 2017-10-18 | Compressed air nail gun with a safety element |
PCT/EP2018/076327 WO2019076605A1 (en) | 2017-10-18 | 2018-09-27 | Compressed air nailer with a safety actuator |
Publications (3)
Publication Number | Publication Date |
---|---|
EP3697573A1 EP3697573A1 (en) | 2020-08-26 |
EP3697573B1 true EP3697573B1 (en) | 2021-09-01 |
EP3697573B8 EP3697573B8 (en) | 2021-11-24 |
Family
ID=60153100
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17197102.1A Withdrawn EP3473385A1 (en) | 2017-10-18 | 2017-10-18 | Compressed air nail gun with a safety element |
EP18773222.7A Active EP3697573B8 (en) | 2017-10-18 | 2018-09-27 | Compressed air nail gun with a safety element |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17197102.1A Withdrawn EP3473385A1 (en) | 2017-10-18 | 2017-10-18 | Compressed air nail gun with a safety element |
Country Status (10)
Country | Link |
---|---|
US (1) | US11628548B2 (en) |
EP (2) | EP3473385A1 (en) |
JP (1) | JP7314123B2 (en) |
CN (1) | CN111225769B (en) |
AU (1) | AU2018351907B2 (en) |
BR (1) | BR112020006457A2 (en) |
ES (1) | ES2899392T3 (en) |
PL (1) | PL3697573T3 (en) |
TW (1) | TWI755570B (en) |
WO (1) | WO2019076605A1 (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US11491623B2 (en) | 2019-10-02 | 2022-11-08 | Illinois Tool Works Inc. | Fastener driving tool |
US20230323972A1 (en) * | 2020-09-10 | 2023-10-12 | Globalforce Ip Limited | Improvements in, or relating to, trigger valves |
Family Cites Families (24)
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DE1478832A1 (en) * | 1965-02-24 | 1969-01-30 | Behrens Friedrich Joh | Driver for driving in fasteners |
US3477629A (en) | 1966-11-23 | 1969-11-11 | Senco Products | Pneumatic fastener applying device |
SE337349B (en) * | 1967-07-12 | 1971-08-02 | Behrens Fa | |
SU418316A1 (en) | 1972-02-28 | 1974-03-05 | ||
SU537809A1 (en) | 1974-02-15 | 1976-12-05 | Всесоюзный Научно-Исследовательский И Экспериментально-Конструкторский Институт Тары И Упаковки | Air gun for driving fasteners into wooden structures |
DE2516157C3 (en) * | 1975-04-14 | 1979-07-26 | Fa. Joh. Friedrich Behrens Ag, 2070 Ahrensburg | Compressed air driving device with a driving plunger protruding from the mouthpiece and serving as a guide pin |
SU895647A1 (en) | 1980-04-11 | 1982-01-07 | Краматорский Научно-Исследовательский И Проектно-Технологический Институт Машиностроения | Percussion-action pneumatic tool |
IL64694A (en) | 1981-01-22 | 1986-07-31 | Signode Corp | Self-starting portable tool and method of using same for driving a fastener |
DE3904504A1 (en) * | 1988-09-21 | 1990-03-22 | Karl Dipl Ing Petersen | Triggering safety device for compressed-air nailers |
JPH0546854Y2 (en) * | 1989-07-27 | 1993-12-08 | ||
DE9216386U1 (en) * | 1992-12-02 | 1993-02-11 | Joh. Friedrich Behrens Ag, 2070 Ahrensburg, De | |
DE4303085A1 (en) * | 1993-02-04 | 1994-08-11 | Reich Maschf Gmbh Karl | Control valve for compressed-air-operated (pneumatically operated) driving-end tools |
JP4114284B2 (en) * | 1999-08-06 | 2008-07-09 | マックス株式会社 | Pneumatic nailer |
JP4026313B2 (en) * | 2000-10-31 | 2007-12-26 | 日立工機株式会社 | Air nailer |
JP5509770B2 (en) | 2008-10-14 | 2014-06-04 | 日立工機株式会社 | Air driving machine |
US8317069B2 (en) * | 2010-02-08 | 2012-11-27 | Robert Bosch Gmbh | Pneumatic nailer with sleeve actuated piston return |
DE102010063173A1 (en) * | 2010-12-15 | 2012-06-21 | Hilti Aktiengesellschaft | A bolt gun and method for operating a bolt gun |
EP2767365B1 (en) | 2013-02-19 | 2016-12-28 | Joh. Friedrich Behrens AG | Compressed air nail gun with a manually actuated trigger and a contact sensor |
DE102013106657A1 (en) | 2013-06-25 | 2015-01-08 | Illinois Tool Works Inc. | Driving tool for driving fasteners into a workpiece |
ITBO20130434A1 (en) * | 2013-08-02 | 2015-02-03 | Fasco Srl | SAFETY DEVICE FOR A NAILER |
TWM487812U (en) | 2014-05-30 | 2014-10-11 | Samson Power Tool Co Ltd | Switching valve assembly structure for nail gun |
TWI523739B (en) * | 2015-02-16 | 2016-03-01 | Basso Ind Corp | Pneumatic electric nail gun |
EP3398722A4 (en) | 2015-12-28 | 2020-03-04 | Koki Holdings Co., Ltd. | Driver |
TWI696527B (en) * | 2016-03-18 | 2020-06-21 | 鑽全實業股份有限公司 | Safety firing control device of pneumatic tool |
-
2017
- 2017-10-18 EP EP17197102.1A patent/EP3473385A1/en not_active Withdrawn
-
2018
- 2018-09-27 US US16/756,594 patent/US11628548B2/en active Active
- 2018-09-27 JP JP2020518756A patent/JP7314123B2/en active Active
- 2018-09-27 CN CN201880067722.5A patent/CN111225769B/en active Active
- 2018-09-27 WO PCT/EP2018/076327 patent/WO2019076605A1/en unknown
- 2018-09-27 BR BR112020006457-2A patent/BR112020006457A2/en not_active Application Discontinuation
- 2018-09-27 PL PL18773222T patent/PL3697573T3/en unknown
- 2018-09-27 AU AU2018351907A patent/AU2018351907B2/en active Active
- 2018-09-27 ES ES18773222T patent/ES2899392T3/en active Active
- 2018-09-27 EP EP18773222.7A patent/EP3697573B8/en active Active
- 2018-10-05 TW TW107135173A patent/TWI755570B/en active
Also Published As
Publication number | Publication date |
---|---|
US20200238492A1 (en) | 2020-07-30 |
CN111225769B (en) | 2023-06-09 |
RU2020113424A3 (en) | 2021-12-27 |
WO2019076605A1 (en) | 2019-04-25 |
JP2020537596A (en) | 2020-12-24 |
BR112020006457A2 (en) | 2020-10-06 |
EP3473385A1 (en) | 2019-04-24 |
TWI755570B (en) | 2022-02-21 |
TW201922433A (en) | 2019-06-16 |
PL3697573T3 (en) | 2022-01-31 |
AU2018351907B2 (en) | 2024-05-02 |
AU2018351907A1 (en) | 2020-04-23 |
EP3697573A1 (en) | 2020-08-26 |
US11628548B2 (en) | 2023-04-18 |
EP3697573B8 (en) | 2021-11-24 |
CN111225769A (en) | 2020-06-02 |
RU2020113424A (en) | 2021-11-18 |
JP7314123B2 (en) | 2023-07-25 |
ES2899392T3 (en) | 2022-03-11 |
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