EP3446833B1 - Cloueur à air comprimé pourvu de dispositif de soupape de sécurité - Google Patents

Cloueur à air comprimé pourvu de dispositif de soupape de sécurité Download PDF

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Publication number
EP3446833B1
EP3446833B1 EP17187512.3A EP17187512A EP3446833B1 EP 3446833 B1 EP3446833 B1 EP 3446833B1 EP 17187512 A EP17187512 A EP 17187512A EP 3446833 B1 EP3446833 B1 EP 3446833B1
Authority
EP
European Patent Office
Prior art keywords
valve
trigger
nail gun
pneumatic nail
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.)
Active
Application number
EP17187512.3A
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German (de)
English (en)
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EP3446833A1 (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.)
Joh Friedrich Behrens AG
Original Assignee
Joh Friedrich Behrens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to PL17187512T priority Critical patent/PL3446833T3/pl
Application filed by Joh Friedrich Behrens AG filed Critical Joh Friedrich Behrens AG
Priority to ES17187512T priority patent/ES2788184T3/es
Priority to EP17187512.3A priority patent/EP3446833B1/fr
Priority to CN201880053950.7A priority patent/CN111372730B/zh
Priority to AU2018319253A priority patent/AU2018319253B2/en
Priority to RU2020110228A priority patent/RU2781550C2/ru
Priority to PCT/EP2018/071970 priority patent/WO2019038124A1/fr
Priority to BR112020002035-4A priority patent/BR112020002035A2/pt
Priority to JP2020508045A priority patent/JP7049049B2/ja
Priority to US16/640,632 priority patent/US11628549B2/en
Priority to TW107129477A priority patent/TWI702122B/zh
Publication of EP3446833A1 publication Critical patent/EP3446833A1/fr
Application granted granted Critical
Publication of EP3446833B1 publication Critical patent/EP3446833B1/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
    • 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
    • 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

Definitions

  • the invention relates to a pneumatic nailer, which has a trigger, a touch sensor and a control valve arrangement. If the compressed air rodent is attached to a workpiece, the surface-mounted sensor is displaced against the force of the spring until an orifice tool lies against the workpiece or almost touches it. A drive-in process can only be triggered when the touch-down sensor is activated in this way. As a result, the pneumatic nailers offer considerably improved security against unintentional triggering compared to devices without a touch sensor.
  • 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 attached to a workpiece and the attachment sensor is thereby actuated. The trigger is then actuated by hand, triggering a single drive-in process. With the so-called contact release, also referred to as "touching”, the user already keeps the trigger pressed while he attaches the pneumatic nailer to the workpiece. When attaching to the workpiece, the touch-down sensor is actuated, triggering a driving-in process.
  • the pneumatic nailer can be used repeatedly in quick succession, which enables very fast work, especially if many fasteners have to be driven in for adequate fastening, and the positioning accuracy of which is only low.
  • the contact initiation process poses an increased risk of injury.
  • the user keeps the manual trigger pressed not only when he wants to place the pneumatic nailer on the same workpiece at a distance of a few centimeters from the last fastener driven in, but also when he changes to another, remotely located workpiece if the object touches an object or part of the body unintentionally, a driving-in process to be triggered.
  • accidents can occur if a user (ignoring important safety regulations) climbs onto a ladder with the pneumatic nailer, keeps the trigger pressed and accidentally brushes his leg with the touch probe.
  • Some known pneumatic nailers seek to reduce this risk associated with the contact release operation by the fact that contact release is only possible for a short period after the trigger has been actuated or after a driving-in operation. 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 a touch-down 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-in 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 a complete actuation of the valve pin can no longer vent the main control line, so that a contact triggering is not possible.
  • a further improvement in safety can be achieved if a first driving-in process always has to be carried out by individual triggering.
  • the device must first be attached to the workpiece for the first driving-in process, whereby the touch-down sensor is actuated. Subsequent actuation of the trigger then triggers the first driving-in process. Subsequently, further driving operations can be carried out by triggering the contact within a short period of time, i.e. by repeatedly lifting and attaching the device to the workpiece while the trigger is continuously pressed.
  • This functionality is the same as in the publication DE 10 2013 106 657 A1 pneumatic nailer described.
  • a trigger and a touch-down sensor are mechanically coupled via a rocker, which acts on a control valve in order to trigger a driving-in process.
  • a pressure is built up in a control chamber, which acts on a mechanical actuator.
  • the control chamber is slowly vented through a vent.
  • the actuator moves into a blocking position, which prevents the touch sensor from acting mechanically on the rocker when the trigger is actuated, making contact tripping impossible.
  • Other examples are also out US 7,556,183 B1 and US 2017/209995 A1 known.
  • the pneumatic rodent is used to drive in fasteners such as nails, pins or staples.
  • the pneumatic nailer can have a magazine for the fastening means, from each of which a fastening means is fed to a receptacle of a mouth tool of the pneumatic nailer.
  • a driving-in process is triggered, compressed air is applied to a working piston of the pneumatic nailer.
  • the working piston drives a driving plunger, which is connected to the working piston.
  • the driving plunger strikes a rear end of the fastening means in the receptacle of the mouth tool and drives the fastening means into the workpiece.
  • the touch-down sensor can be a mechanical component which projects beyond the front end of the mouth tool and is held in this position by a spring until the pneumatic nailer is attached to a workpiece. Then the touch sensor is moved against the direction of the spring force and against the driving direction until a muzzle tool of the pneumatic nailer bears against the workpiece or almost bears against it.
  • the pneumatic nailer has a main control line, which is aerated or vented to trigger a driving process.
  • the main control line is connected to the control valve arrangement in the open position of the safety valve arrangement.
  • the driving process can be initiated in different ways by means of the main control line.
  • an embodiment with a main valve and a pilot valve, which is controlled via the main control line is known. Details of this are explained for the exemplary embodiment. However, other constructions with or without pilot valve are also conceivable. It is only important for the invention that the driving-in process can be triggered by venting or venting the main control line.
  • the control valve arrangement comprises two valves, each of which is assigned a mechanical actuating element. These are the trigger valve, which is actuated by the trigger to be actuated by hand, and the touchdown sensor valve, which is actuated or can be actuated by the touchdown sensor, that is to say when the pneumatic nailer is attached to a workpiece.
  • a special feature of the invention is the safety valve arrangement. It is a pressure-controlled valve arrangement with two control rooms. The pressures in the two control rooms act on the safety valve arrangement or on at least one displaceable actuator of the safety valve arrangement, so that the safety valve arrangement can be shifted between a blocking position and an open position by controlling these pressures.
  • the safety valve assembly performs two important functions. First, it controls whether the main control line is connected to the control valve assembly. Only if this is the case can a driving-in process be triggered by means of the control valve arrangement. The safety valve arrangement thus prevents a driving-in process from being triggered if it is in the blocking position.
  • the position of the safety valve arrangement is decisive for whether or not there is a connection between the touch-down sensor valve and the second control chamber.
  • This connection exists in the open position, so that actuation of the touch-down sensor valve can influence the pressure in the second control chamber. If, on the other hand, the safety valve arrangement is in the blocking position, the connection mentioned does not exist and actuation of the touch-down sensor valve has no significant influence on the pressure in the second control chamber.
  • the first control chamber is connected to the trigger valve in such a way that actuation of the trigger valve attempts to bring the safety valve arrangement into the blocking position.
  • this can be achieved by venting the first control room, but also, for example, by venting the first control room.
  • the connection between the trigger valve and the first control chamber can exist regardless of the position of the safety valve arrangement.
  • a driving-in process can only be triggered in a certain order by actuating the touch-down sensor and the trigger. If the trigger is actuated first, the connection of the trigger valve to the first control chamber causes the safety valve arrangement to be shifted into the blocking position. Subsequent actuation of the touch-down sensor and the associated touch-down sensor valve can then no longer act on the second control chamber, so that the safety valve arrangement remains in the blocking position and no driving-in process is triggered.
  • the pressure in the second control chamber can be influenced in such a way that the safety valve arrangement remains in its open position when the trigger and thus the trigger valve are subsequently actuated.
  • the two control rooms of the safety valve arrangement are to be designed such that the forces exerted on the safety valve arrangement by the pressures in the two control rooms, possibly including other forces acting on the safety valve arrangement, hold the safety valve arrangement in the open position or shift it to the open position.
  • the pneumatic nailer is in a basic state, for example after starting up the pneumatic nailer (e.g. by connecting the pneumatic nailer to a compressed air source) or after a break from work, it is fundamentally not possible to initiate a driving process by first triggering and then when the trigger is actuated , the touch probe is operated.
  • the described influencing of the pressure in the second control chamber by actuating the touch-down sensor valve occurs at any rate when the trigger is actuated.
  • the control valve arrangement can optionally also be designed so that the action of the touch-down sensor valve on the second control chamber occurs regardless of the state of the trigger valve. However, this is not necessary for the function described.
  • the second control chamber is connected to the surface-mounted sensor valve in such a way that an actuation of the surface-mounted sensor valve always tries to bring the safety valve arrangement into the open position when the trigger valve is actuated.
  • actuation of the touch-down sensor valve influences the pressure in the second control chamber in such a way that a force is exerted on a movable element of the safety valve arrangement in the direction of the open position. This happens at least when the trigger valve is actuated at the same time.
  • the action of the touch-down sensor valve on the second control room can consist in ventilation of the second control room, but depending on the design of the safety valve arrangement, venting of the second control room can also be considered when the touch-up sensor valve is actuated, for example.
  • the safety valve arrangement has a single actuator which can be shifted between the blocking position and the open position, a pressure in the first control chamber having a first force on the actuator and a pressure in the second control chamber having a second force opposite to the first force the actuator exercises.
  • the safety valve arrangement is responsible for establishing or separating two connections, namely on the one hand between the main control line and the release valve and on the other hand between the surface-mounted sensor valve and the second control chamber. These functions can basically be performed with the help of separate actuators.
  • the use of a single actuator is in contrast, it is particularly simple.
  • the two control spaces can be arranged on opposite sides of the actuator, so that the forces exerted on the actuator by the respective pressures are automatically directed in opposite directions. The effects of the two forces can be measured by a suitable choice of the surfaces of the actuator on which the pressures act, in particular in such a way that the actuator remains in the open position when both forces act simultaneously.
  • the pneumatic nailer has a spring which exerts a force on the actuator in the direction of the open position. It can thereby be achieved that in the initial state of the pneumatic nailer the actuator is in a defined position, namely in the open position.
  • each actuation of the trigger valve causes the first control chamber to be ventilated.
  • an input of the trigger valve can be connected to a housing interior carrying compressed air, and an output of the trigger valve can be in constant communication with the first control chamber via a line.
  • the trigger valve is actuated each time the trigger is actuated, regardless of a position of the touch sensor.
  • the trigger thus acts directly on the trigger valve, in particular in that a contact surface of the trigger acts on a valve pin of the trigger valve.
  • the touchdown sensor valve is actuated each time the touchdown sensor is actuated, regardless of a position of the trigger.
  • the touch sensor directly onto the touch sensor valve, for example with an actuating surface of the touch sensor, which acts on a valve pin of the touch sensor valve.
  • the main control line is connected in the open position to an output of the touch-down sensor valve and an input of the touch-down sensor valve is connected to an output of the trigger valve.
  • the trigger valve and touch-down sensor valve are therefore connected in series, so that both of the valves mentioned must be actuated to influence the pressure in the main control line.
  • the compressed air is fed from this housing interior via the trigger valve and the touch-down sensor valve into the main control line if the two valves are actuated at the same time.
  • a non-return valve is arranged in a line that connects the touch-down sensor valve to the second control chamber in the open position.
  • the check valve can be aligned in such a way that with the aid of the surface-mounted sensor valve, only ventilation or exclusively ventilation of the second control room is possible. In both cases, the check valve can result in the pressure prevailing in the second control chamber being maintained regardless of the position of the touch-down sensor valve.
  • the second control chamber is vented via a throttle and connected to a storage chamber.
  • the volume of the storage chamber and the opening cross-section the throttle can be selected so that the pressure conditions established with the aid of the touch-down sensor valve in the second control chamber are maintained for a period of, for example, 0.5 seconds to 10 seconds to such an extent that the safety valve arrangement remains in the open position. It is then possible to initiate contact within this period.
  • the safety valve arrangement vents the second control chamber in the blocking position.
  • the pressure in the second control chamber can be reset each time the safety valve arrangement responds, that is to say whenever the safety valve arrangement comes into the blocking position. This means that the safety valve arrangement remains reliably in the blocking position, at least as long as the pressure conditions in the first control chamber do not change.
  • the safety valve arrangement vents the main control line in the blocking position. This security measure counteracts an unintentional triggering of a driving process.
  • the safety valve arrangement has a locking sleeve as an actuator, within which the touch-down sensor valve is arranged. This constructive measure enables a particularly compact structure to be achieved.
  • the surface-mounted sensor valve has a fixed valve sleeve and a displaceable valve pin guided therein, the locking sleeve surrounding the valve sleeve and interacting with it. This measure also favors a compact structure.
  • the Fig. 1 an overview of the structure of a pneumatic nailer 10 according to the invention given.
  • the pneumatic nailer 10 has a lower housing part 140 with a handle 12.
  • the lower housing part 140 is closed at the top by a housing cap 142.
  • a control valve arrangement is arranged on the handle 12 with a trigger valve 22, which is assigned to a trigger 14, and a touchdown sensor valve 18, which is assigned to a touchdown sensor 24.
  • the touch-down sensor 24 projects a few millimeters downward over the mouth 26 of a mouth tool 28. If the pneumatic nailer 10 is attached to a workpiece, the placement sensor 24 is displaced upward against the force of a spring, not shown, until it is flush or almost flush with the mouth 26.
  • a slider 30, which is a continuation of the touchdown sensor 24 or is connected to the touchdown sensor 24, always moves together with the touchdown sensor 24. In particular, it follows its movement upwards relative to the housing when the pneumatic nailer 10 is attached to a workpiece until he actuated the touch sensor valve 18.
  • the mouth tool 28 has a receptacle 46, to each of which a fastener is fed 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 plunger 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 the working cylinder 54 and closes it in a sealing manner, 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 are shown on the basis of the enlargement of the Figure 2 explained.
  • FIG. 2 In the Figure 2 are individual elements of the pneumatic nailer 10, which in Fig. 1 are arranged above the housing cap 142, omitted.
  • the pilot valve 58 is clearly visible. 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 main 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. In this position, it is held by the force of a spring 102.
  • the control piston 94 has, in addition to the lower O-ring 100, a central 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 108 which is connected to outside air.
  • the middle O-ring 104 is not in seal, so that a 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 control line 110 is not visible over a section plane shown in the figure Connection with the space 72, which opens into the radial bore 112 connected.
  • the housing interior 64 is ventilated, ie connected to a compressed air connection, not shown, and is under operating pressure.
  • the 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 seals the upper edge of the working cylinder 54 against the housing interior 64 by means of an O-ring 118 .
  • 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 drive-in process is triggered by venting the main control line 82 by moving the control piston 94 upward, so that the middle O-ring 104 comes into seal and the upper O-ring 106 moves out of the seal.
  • the connection of the control line 110 to the housing interior 64 is blocked and a connection is established between the control line 110 and a ventilation opening, not shown.
  • the space 114 above the main valve actuator 116 is vented via the ventilation opening and the main valve actuator 116 is displaced upward against the force of the spring 120 by the pressure prevailing on its lower, outer annular surface 122 in the housing interior 64.
  • compressed air flows from the housing interior 64 into the working cylinder 54 above the working piston 52 and drives the working piston 52 downward.
  • the driving plunger 50 connected to the working piston 52 drives in a fastening means.
  • the trigger valve 22 actuated by the trigger 14 has a first inlet 32 which is connected to the housing interior 64.
  • a second inlet 34 of the trigger valve 22 is connected to outside air.
  • the output 36 of the trigger valve 22, which is connected to the second input 34 in the drawn, unactuated position of the trigger valve 22, is connected via a line 38 to a first input 40 of the touchdown sensor valve 18.
  • the second inlet 42 of the touch-down sensor valve 18 is connected to outside air. In the illustrated, unactuated position of the surface-mounted sensor valve 18, the outlet 44 of the surface-mounted sensor valve 18 is connected to the second input 42 of the surface-mounted sensor valve 18.
  • the safety valve arrangement 16 has a first control chamber 60, a second control chamber 62, a first outlet 66 and a second outlet 68.
  • the safety valve arrangement 16 has a first inlet 74, a second inlet 76, a third inlet 78 and a fourth inlet 80 only actuator 98 of the safety valve arrangement 16 can be shifted from the open position shown into a blocking position.
  • the first inlet 74 of the safety valve arrangement 16 is connected via a line 124 to the outlet 44 of the surface-mounted sensor valve 18.
  • the first outlet 66 of the safety valve arrangement 16 is connected to the main control line 82
  • the second inlet 76 of the safety valve arrangement 16 is connected to outside air.
  • the first input 74 is connected to the first output 66, so that there is a connection between the main control line 82 and the control valve arrangement 20.
  • the third input 78 of the safety valve arrangement 16 is connected via a line 126, in which a check valve 128 is arranged, to the output 44 of the touchdown sensor valve 18.
  • the fourth input 80 of the safety valve arrangement 16 is connected to outside air.
  • the second outlet 68 of the safety valve arrangement 16 is connected to a storage chamber 130 and to the second control chamber 62. There is also a connection between the second control chamber 62 or the second outlet 68 of the safety valve arrangement and a throttle 132, via which the storage chamber 130 is vented.
  • the third inlet 78 is connected to the second outlet 68, so that ventilation of the second control chamber 62 is possible via the touch-down sensor valve 18.
  • the first control chamber 60 is connected to the outlet 36 of the trigger valve 22 via a line shown in broken lines.
  • the main control line 82 is vented through the connection between the first outlet 66 and the second inlet 76 of the safety valve arrangement 16 which is established in the locked position. If a pressure different from outside air prevailed in the storage chamber 130, this becomes vented at the same time via the connection established by the safety valve arrangement 16 between the second outlet 68 and the fourth inlet 80.
  • the touch-down sensor valve 18 In order to trigger a first driving-in process starting from the initial state, the touch-down sensor valve 18 must first be actuated. This creates a connection between the first input 40 and the output 44 of the touch-down sensor valve 18. With a subsequent actuation of the trigger valve 22, a connection is then established between its first input 32 and its output 36, so that compressed air via line 38 into the first control chamber 60 and at the same time via the actuated touch-up sensor valve 18, the check valve 128 and the line 126 and the in the open position existing connection between the third input 78 and the second output 68 of the safety valve arrangement 16 flows into the second control chamber 62.
  • the touch-down sensor valve 18 returns to its drawn, unactuated position. Because of the check valve 128, the pressure prevailing in the storage chamber 130 and the second control chamber 62 is initially maintained, so that the actuator 98 remains in its open position. However, the pressure in the second control chamber 62 and the storage chamber 130 slowly decreases via the throttle 132 until it finally drops below a pressure threshold. At this moment, the actuator 98 shifts into its blocking position due to the pressure that is still present in the first control chamber 60 when the trigger valve 22 is actuated continuously. From this point onwards, further contact initiation is not possible.
  • the trigger 14 which is pivotably mounted about a pivot axis 86, and the slide 30 of the touchdown sensor 24. This can move up and down when the touchdown sensor valve 24 is actuated, around the valve pin 88 of the touchdown sensor valve 18 against the force to shift a spring 134 into an actuated position.
  • the trigger valve 22 also has a valve pin 90 which can be displaced into an actuated position against the force of a spring 92. This is done directly by interacting with the trigger 14.
  • FIG. 4 shows the initial state in which touch-down sensor valve 18 and trigger valve 22 are each drawn in their unactuated position.
  • the safety valve arrangement 16 has, as the actuator 98, a blocking sleeve 144 which surrounds a valve sleeve 146 of the touchdown sensor valve 18.
  • the pressurized housing interior 64 is blocked by the O-ring 148 from the line 38 leading to an inlet of the touch-down sensor valve 18. Instead, the line 38 is connected to outside air via the radial bore 150 and the annular gap 152 of the trigger valve 22.
  • the main control line 82 is also connected to the outside air, namely via a radial bore 154 in the locking sleeve 144, which is in its open position, a radial bore 156 in the valve sleeve 146 and an annular gap 158 of the touch-down sensor valve 18.
  • the radial bore 156 in the valve sleeve 146 and thus also the main control line 82 is shut off from the line 38 by the O-ring 160 of the touch-down sensor valve 18 located in the seal.
  • the first control chamber 60 which is connected to the line 38, is located above the locking sleeve 144.
  • the pressure in this first control chamber 60 acts on the locking sleeve 144 via an annular surface 162 of the locking sleeve 144 and searches for this in the Figure 4 to shift down to the locked position.
  • the second control chamber 62 is located below the locking sleeve 144 and acts on the locking sleeve 144 via two ring surfaces 164, 166.
  • the pressure in the second control chamber 62 therefore tries the locking sleeve 144 in the open position shown, that is in the Fig. 4 to shift up.
  • the spring 84 also exerts a force in this direction on the locking sleeve 144.
  • the second control chamber 62 has a relatively large volume and is therefore at the same time a storage chamber 130.
  • the second control chamber 62 or the storage chamber 130 is connected to outside air via the throttle 132.
  • Figure 5 shows the arrangement Figure 4 after attaching the pneumatic nailer 10 to a workpiece.
  • Figures 5 to 9 only provide the elements mentioned for these figures with reference numerals.
  • the O-ring 160 has moved out of the seal, so that the line 38 is now connected to the main control line 82 via the contact sensor valve 18 and its radial bore 156 and the radial bore 154 in the locking sleeve 144.
  • the O-ring 188 seals the lines 124, 126 against outside air. Since the trigger valve 22 is still in its unactuated position, the line 38 is vented, so that the actuation of the touch-down sensor valve 18 has no further effect.
  • the O-ring 148 moves out of the seal, so that the line 38 is vented.
  • the O-ring 168 seals this line 38 from outside air.
  • the first control chamber 60 connected to the line 38 is also ventilated.
  • the valve sleeve 146 has a radial bore 170 and an O-ring 172 closing it.
  • the radial bore 170 and the O-ring 172 together form the check valve 128.
  • the second control chamber 62 is also ventilated via line 38.
  • the air flows through the check valve 128 and further through an annular gap 174 formed between the valve sleeve 146 and the blocking sleeve 144.
  • This ventilation of the second control chamber 62 takes place approximately at the same time as the ventilation of the first control chamber 60, so that the two control rooms 60, 62 forces exerted on the locking sleeve 144 take effect approximately simultaneously.
  • the touchdown sensor valve 18 returns to its unactuated position. This is in Figure 7 shown.
  • contact actuation can be carried out at any time by actuating the touch-down sensor valve 24 again, which at the same time leads to a refreshing of the pressure in the second control chamber 62 on the route already outlined, so that the time window for a further contact initiation opens again.
  • the O-ring 178 also arranged on the valve sleeve 146 closes an annular gap between the valve sleeve 146 and the locking sleeve 144, via which there was previously a connection between the radial bore 156 of the valve sleeve 146 and the radial bore 154 of the locking sleeve 144.
  • the main control line 82 is blocked by the line 38.
  • the locking sleeve 144 is now in her for so long Figure 8 shown blocking position, how the trigger 14 remains actuated.

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

Claims (14)

  1. Cloueur à air comprimé (10) comprenant
    • un piston de travail (52), qui est relié à un poussoir d'enfoncement (50) servant à enfoncer un moyen de fixation et qui est mis sous pression avec de l'air comprimé lors du déclenchement d'un processus d'enfoncement,
    • un déclencheur (14) et un palpeur de pose (24), dont l'actionnement commun peut aérer ou désaérer une conduite de commande principale (82) et déclencher un processus d'enfoncement de ce fait,
    • un dispositif de soupape de commande (20), qui présente une soupape de déclencheur (22) associée au déclencheur (14) et une soupape de palpeur de pose (18) associée au palpeur de pose (24), et
    • un dispositif de soupape de sécurité (16), qui est déplaçable entre une position de fermeture et une position d'ouverture par la commande de la pression dans un premier compartiment de commande (60) et de la pression dans un second compartiment de commande (62), dans lequel
    • la conduite de commande principale (82) est reliée au dispositif de soupape de commande (20) dans la position d'ouverture et n'est pas reliée au dispositif de soupape de commande (20) dans la position de fermeture,
    • le premier compartiment de commande (60) est relié à la soupape de déclencheur (22), de sorte qu'un actionnement de la soupape de déclencheur (22) tend à mettre le dispositif de soupape de sécurité (16) dans la position de fermeture,
    • le second compartiment de commande (62) est relié à la soupape de palpeur de pose (18) dans la position d'ouverture, de sorte qu'un actionnement de la soupape de palpeur de pose (18) tend à mettre le dispositif de soupape de sécurité (16) dans la position d'ouverture en tout cas lorsque la soupape de déclencheur (22) est actionnée.
  2. Cloueur à air comprimé (10) selon la revendication 1, caractérisé en ce que le dispositif de soupape de sécurité (16) présente un seul organe d'asservissement (98), qui est déplaçable entre la position de fermeture et la position d'ouverture, dans lequel une pression dans le premier compartiment de commande (60) exerce une première force sur l'organe d'asservissement (98) et une pression dans le second compartiment de commande (62) exerce une seconde force opposée à la première force sur l'organe d'asservissement (98).
  3. Cloueur à air comprimé (10) selon la revendication 2, caractérisé par un ressort (84), qui exerce une force sur l'organe d'asservissement (98) dans le sens de la position d'ouverture.
  4. Cloueur à air comprimé (10) selon l'une des revendications 1 à 3, caractérisé en ce que chaque actionnement de la soupape de déclencheur (22) induit une aération du premier compartiment de commande (60).
  5. Cloueur à air comprimé (10) selon l'une des revendications 1 à 4, caractérisé en ce que la soupape de déclencheur (22) est manœuvrée à chaque actionnement du déclencheur (14) indépendamment d'une position du palpeur de pose (24).
  6. Cloueur à air comprimé (10) selon l'une des revendications 1 à 5, caractérisé en ce que la soupape de palpeur de pose (18) est manœuvrée à chaque actionnement du palpeur de pose (24) indépendamment d'une position du déclencheur (14).
  7. Cloueur à air comprimé (10) selon l'une des revendications 1 à 6, caractérisé en ce que la conduite de commande principale (82) est reliée à une sortie (44) de la soupape de palpeur de pose (18) dans la position d'ouverture et qu'une entrée (40) de la soupape de palpeur de pose (18) est reliée à une sortie (36) de la soupape de déclencheur (22).
  8. Cloueur à air comprimé (10) selon l'une des revendications 1 à 7, caractérisé en ce qu'un clapet antiretour (128) est disposé dans une conduite (126), qui relie la soupape de palpeur de pose (18) au second compartiment de commande (62) dans la position d'ouverture.
  9. Cloueur à air comprimé (10) selon l'une des revendications 1 à 8, caractérisé en ce que le second compartiment de commande (62) désaère par le biais d'un organe d'étranglement (132) et est relié à une chambre de stockage (130).
  10. Cloueur à air comprimé (10) selon l'une des revendications 1 à 9, caractérisé en ce que le dispositif de soupape de sécurité (16) désaère le second compartiment de commande (62) dans la position de fermeture.
  11. Cloueur à air comprimé (10) selon l'une des revendications 1 à 10, caractérisé en ce que le dispositif de soupape de sécurité (16) désaère la conduite de commande principale (82) dans la position de fermeture.
  12. Cloueur à air comprimé (10) selon l'une des revendications 1 à 11, caractérisé en ce que le dispositif de soupape de sécurité (16) présente un manchon de blocage (144) servant d'organe d'asservissement (98), à l'intérieur duquel la soupape de palpeur de pose (18) est disposée.
  13. Cloueur à air comprimé (10) selon la revendication 12, caractérisé en ce que la soupape de palpeur de pose (18) présente un manchon de soupape (146) disposé fixement et une tige de soupape (88) déplaçable, guidée à l'intérieur dudit manchon, dans lequel le manchon de blocage (144) enveloppe le manchon de soupape (146) et interagit avec celui-ci.
  14. Cloueur à air comprimé (10) selon la revendication 13, caractérisé en ce que le clapet antiretour (128) est formé par un joint torique (172), qui est inséré dans une rainure périphérique du manchon de soupape (146).
EP17187512.3A 2017-08-23 2017-08-23 Cloueur à air comprimé pourvu de dispositif de soupape de sécurité Active EP3446833B1 (fr)

Priority Applications (11)

Application Number Priority Date Filing Date Title
ES17187512T ES2788184T3 (es) 2017-08-23 2017-08-23 Pistola neumática de clavos con dispositivo de válvula de seguridad
EP17187512.3A EP3446833B1 (fr) 2017-08-23 2017-08-23 Cloueur à air comprimé pourvu de dispositif de soupape de sécurité
PL17187512T PL3446833T3 (pl) 2017-08-23 2017-08-23 Gwoździarka pneumatyczna z układem zaworu bezpieczeństwa
AU2018319253A AU2018319253B2 (en) 2017-08-23 2018-08-14 Pneumatic nail gun having a safety valve assembly
RU2020110228A RU2781550C2 (ru) 2017-08-23 2018-08-14 Пневматический гвоздезабивной пистолет с предохранительным клапанным блоком
PCT/EP2018/071970 WO2019038124A1 (fr) 2017-08-23 2018-08-14 Cloueuse pneumatique à ensemble soupape de sécurité
CN201880053950.7A CN111372730B (zh) 2017-08-23 2018-08-14 具有安全阀组件的气动钉枪
BR112020002035-4A BR112020002035A2 (pt) 2017-08-23 2018-08-14 pregador de ar comprimido com disposição de válvula de segurança
JP2020508045A JP7049049B2 (ja) 2017-08-23 2018-08-14 安全弁装置を備えた圧縮空気釘打機
US16/640,632 US11628549B2 (en) 2017-08-23 2018-08-14 Compressed air nailer with safety valve assembly
TW107129477A TWI702122B (zh) 2017-08-23 2018-08-23 具有安全閥配置的壓縮空氣釘槍

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP17187512.3A EP3446833B1 (fr) 2017-08-23 2017-08-23 Cloueur à air comprimé pourvu de dispositif de soupape de sécurité

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EP3446833A1 EP3446833A1 (fr) 2019-02-27
EP3446833B1 true EP3446833B1 (fr) 2020-04-15

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EP (1) EP3446833B1 (fr)
JP (1) JP7049049B2 (fr)
CN (1) CN111372730B (fr)
AU (1) AU2018319253B2 (fr)
BR (1) BR112020002035A2 (fr)
ES (1) ES2788184T3 (fr)
PL (1) PL3446833T3 (fr)
TW (1) TWI702122B (fr)
WO (1) WO2019038124A1 (fr)

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TWI734418B (zh) * 2020-03-18 2021-07-21 力肯實業股份有限公司 氣動釘槍的氣路結構
US11583986B2 (en) * 2020-03-18 2023-02-21 De Poan Pneumatic Corp. Air-path structure of pneumatic nail gun
TWI734417B (zh) * 2020-03-18 2021-07-21 力肯實業股份有限公司 氣動釘槍的氣路結構
TWI771006B (zh) * 2021-05-18 2022-07-11 力肯實業股份有限公司 氣動釘槍的氣路結構
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Publication number Publication date
US11628549B2 (en) 2023-04-18
CN111372730B (zh) 2023-11-21
AU2018319253A1 (en) 2020-02-13
US20210138621A1 (en) 2021-05-13
JP7049049B2 (ja) 2022-04-06
TW201919826A (zh) 2019-06-01
RU2020110228A (ru) 2021-09-24
TWI702122B (zh) 2020-08-21
PL3446833T3 (pl) 2020-10-19
BR112020002035A2 (pt) 2020-09-08
RU2020110228A3 (fr) 2021-12-16
EP3446833A1 (fr) 2019-02-27
ES2788184T3 (es) 2020-10-20
AU2018319253B2 (en) 2023-02-23
JP2021501059A (ja) 2021-01-14
WO2019038124A1 (fr) 2019-02-28
CN111372730A (zh) 2020-07-03

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