EP0608782B1 - Powered handtool for applying fasteners - Google Patents

Powered handtool for applying fasteners Download PDF

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Publication number
EP0608782B1
EP0608782B1 EP94100868A EP94100868A EP0608782B1 EP 0608782 B1 EP0608782 B1 EP 0608782B1 EP 94100868 A EP94100868 A EP 94100868A EP 94100868 A EP94100868 A EP 94100868A EP 0608782 B1 EP0608782 B1 EP 0608782B1
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EP
European Patent Office
Prior art keywords
mouthpiece
drive part
driving
actuating
tool according
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.)
Expired - Lifetime
Application number
EP94100868A
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German (de)
French (fr)
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EP0608782A1 (en
Inventor
Jürgen W. Fehlings
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.)
FEHLINGS AUTOMATION GmbH
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FEHLINGS AUTOMATION GmbH
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Publication date
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Publication of EP0608782A1 publication Critical patent/EP0608782A1/en
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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
    • B25C1/001—Nail feeding devices
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J15/00—Riveting
    • B21J15/10—Riveting machines
    • B21J15/30—Particular elements, e.g. supports; Suspension equipment specially adapted for portable riveters
    • B21J15/32—Devices for inserting or holding rivets in position with or without feeding arrangements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B23/00—Details of, or accessories for, spanners, wrenches, screwdrivers
    • B25B23/02—Arrangements for handling screws or nuts
    • B25B23/04—Arrangements for handling screws or nuts for feeding screws or nuts

Definitions

  • the invention relates to a power-driven driving tool for fasteners, which in a hand-held unit has a drive part with an actuating means for the fastening means that can be driven by the latter, and a mouthpiece, wherein the actuating means penetrating the mouthpiece is displaceable relative to the latter, and the fastening means can be moved from a single one to the mouthpiece can be supplied, as well as with a controller for controlling the supply of the fasteners into the mouthpiece, the controller having an actuator.
  • Fastening means are understood to mean in particular screws, rivets and nails.
  • the loading means is primarily a screwdriver blade; when using rivets and nails, the loading means is designed in particular as a plunger hammer.
  • the driving tool can be driven, for example, electrically or pneumatically.
  • a generic driving tool for fasteners is known from German Offenlegungsschrift 24 15 241.
  • This shows a power-driven driving tool, in particular a screwdriver, in which the mouthpiece is guided so as to be longitudinally displaceable in a mouthpiece guide of the one drive part.
  • a switch which can be actuated by the mouthpiece is arranged in the equipment line of the singler, with which the singler is set to feed when the mouthpiece is empty and to interrupt the feed when the mouthpiece is full.
  • a piston valve designed as a 2/2-way valve, the flow of which is blocked in the starting position, is arranged in the mouthpiece of the screwdriver transversely to the screw-in direction
  • the actuating part designed as a control piston of the piston valve being arranged by control cams arranged on the mouthpiece guide from the two control piston faces is controllable and the control piston strikes in the extended position of the mouthpiece against a stop of the mouthpiece guide, to limit the mouthpiece extension path.
  • a power driven driving device for fasteners in which the control for controlling the supply of the fasteners into the mouthpiece is arranged outside the hand-held unit and a movement-locking connection between a control element designed as a cam plate and the drive part is provided.
  • a control element designed as a cam plate and the drive part Corresponding to the relative movement of the loading means and the mouthpiece, the cam plate provided with two curves is shifted due to the positive connection in the manner of a Bowden cable and controls the feeding of the fastening means into the mouthpiece via fingers.
  • a disadvantage of this design of the driving tool is the complicated design of the curve plate with the two curves, it being impossible to change the control for controlling the supply of the fastening means into the mouthpiece due to the fixed curves. Apart from this, the axial movement of the loading means takes place only when the driving tool is operated manually. External charging of the Bowden cable is not intended.
  • a drive-in device is known from US Pat. No. 3,648,744, in which a flow monitor is integrated in the compressed air supply to the drive part of the drive-in device and controls the separation of the fastening means via the air consumption of the drive part.
  • the flow monitor has a branch line connected to a separator, the latter Compressed air supplied to the branch line is controlled as a function of the position of the actual valve of the flow switch.
  • the flow monitor is arranged outside of the hand-held structural unit which has the drive part.
  • the control of the supply of the fasteners should be particularly simple and can be used for different types of driving tools, and the driving-in process should also be particularly simple and convenient using the hand-operated unit.
  • the invention proposes a power-driven driving-in device for fastening means, which in a hand-held structural unit has a drive part with an actuating means for the fastening means, which can be driven thereby, and a mouthpiece, the actuating means penetrating the mouthpiece being displaceable relative to the latter, and the fastening means by one Individual can be fed to the mouthpiece, as well as with a controller for controlling the supply of the fastening means into the mouthpiece, the controller being arranged outside the structural unit and a movement-locking connection being provided between an actuating part of the control and the mouthpiece or the drive part, furthermore outside the A further drive part for moving the loading means and mouthpiece relative to one another is provided, as well as the further drive part transmitting tension and / or pressure force with the mouthpiece or one Drive part is connected.
  • a movement-locking connection is understood to mean any connection which is suitable for transmitting the movement of the mouthpiece or the drive part to the actuating part in a linear or fixed manner.
  • the movement-locking connection can thus be made in the broadest sense by means of any gear.
  • a mechanical connection for example in the form of a flexible shaft, in particular a Bowden cable
  • a further drive part for displacing the loading means and the mouthpiece relative to one another is provided outside of the structural unit, the other drive part being connected to the mouthpiece or the one drive part in a manner transmitting tension and / or pressure. If the connection is made either to transmit tractive force or to transmit compressive force, the respective return movement can take place by means of one or more spring elements. However, it is considered to be advantageous if the connection is both transmission and pressure transmission. Positions of the mouthpiece relative to the actuating means or the one drive part assigned to it can be expediently specified via the further drive part.
  • a first position can be specified, for example, in which the screwdriver blade is in contact with the screw head of the screw held in a collet of the mouthpiece by the action of the further drive, and a second position in which the screwdriver blade removes the screw from the Push out the collet and screw it in completely.
  • the first position mentioned is particularly advantageous when attaching a screw fixed in a collet or ball locking sleeve of the mouthpiece in order to subsequently screw it.
  • the fastening means cannot move axially back into the mouthpiece in the first position mentioned, that is, in the case of the use of screws, the screwdriver blade is in contact with the screw head to ensure that the screw does not move axially can push the mouthpiece back.
  • the position mentioned is also advantageous if work is to be carried out overhead by means of the hand-held structural unit, that is to say the fastening means are to be discharged from the structural unit not downwards but upwards.
  • conventional retaining jaws for the fasteners can be dispensed with.
  • a special embodiment of the invention provides that the control and the further drive part are connected to the mouthpiece or the one drive part by means of a common Bowden cable.
  • a common Bowden cable is required, which means that the outlay in apparatus for the driving tool according to the invention can be kept very low.
  • the control and the further drive part expediently form a further structural unit. Due to the flexible connection of the two structural units, in particular via a common connecting element in the manner of the common Bowden cable, the further structural unit can be set up as desired in relation to the hand-guided structural unit. Without the need to modify the hand-held structural unit for the respective application, all desired modifications can be incorporated in the further structural unit, the control and, if appropriate, the further drive part has to be integrated. For example, in coordination with the drive part and the mouthpiece used in the hand-held unit, it can be provided to provide adjustable signal transmitters for detecting different positions of the actuating part or to provide adjustable stops for the movable components located in the further drive part. In addition, the stroke length of the Bowden cable can be changed using an adjusting device.
  • a special design provides that the actuating part is displaceably guided in a housing of the further structural unit, with at least two signal transmitters for detecting the different positions of the actuating part being mounted in the housing, by means of which the separator can be controlled.
  • the separator can also be integrated in the further structural unit and cooperate with a connection of the mouthpiece via a feed hose.
  • the control part of the control is connected to the mouthpiece in a movement-locking manner, while in a second basic design the movement-locking connection between the control part of the control and the one drive part takes place.
  • the first basic embodiment can have, for example, a mouthpiece which is displaceably mounted in a mouthpiece guide of the one drive part, the Bowden cable being mounted with one end of the Bowden cable casing in the one drive part or the mouthpiece guide and with the other end of the casing in a housing of the further component is, and the Bowden cable wire engages with one end on the mouthpiece and with the other end on the adjusting part of the further component.
  • the one drive part can be displaceable in a guide housing by means of a feed element mounted therein, and the mouthpiece can be mounted in the guide housing, the Bowden cable with one end of the Bowden cable casing in the guide housing and with the other end of the casing in one Housing of the further component is mounted, and the Bowden cable wire with one end on one drive part and with the other end attacks on the control element of the other component.
  • the further drive part expediently has at least one plunger which can be moved by means of a force means to act on the actuating part or the actuating part itself is designed as a plunger.
  • the plunger or plungers can be actuated pneumatically and two plungers with different end positions on the actuating part side are provided. Stops should be available to limit the actuating movements of the actuating part or the plunger.
  • the power-driven tacker according to the above description of the invention has the control located outside the hand-held unit or the external drive part located outside, which interacts with the control part of the control.
  • This external arrangement of the components makes it possible to individually match the components of the hand-held unit, so that the most varied makes of drive parts for the hand-held unit can be used in conjunction with different mouthpiece designs. It is only essential to represent the relative movement between the mouthpiece and the one drive part or the actuating means which can be driven by the latter via the movement-locking connection externally via the control, which in turn is via known components, in particular electronic components with the singler also known from the prior art interacts, which feeds a fastener to the mouthpiece per cycle.
  • the reference number 102 denotes a pneumatic connection of the pneumatic screwdriver 1; the screwdriver 1 has a screwdriver blade 6 for screwing in the screw 101.
  • a compression spring 7 is effective between the screwdriver 1 and the mouthpiece 3 and thus biases the mouthpiece 3 away from the screwdriver 1.
  • Reference number 11 denotes a screw separating device 11 integrated in the screw feed device 10.
  • the screw feeder 10 with screw separating device 11 is integrated in a further structural unit 103, which likewise brings about an assembly 104 for controlling the supply of the screws from the screw feeder 10 to the mouthpiece 3 and, if necessary, the forceful application of the mouthpiece 3 relative to the compressed air screwdriver 1.
  • the unit 104, the mouthpiece 3 and the mouthpiece guide 2 and the part of the screw feeder 10 shown are shown essentially in a sectional view.
  • the unit 104 has an actuating part 105 which can be moved in a cylindrical housing 13.
  • a guide section 106 of the actuating part 105 is matched to the inside diameter of the housing 13; an enlarged section 107 of the actuating part 105 adjoins the guide section 106.
  • two pistons 19 and 20 with respective piston rods 12 are displaceably mounted in corresponding bores of the housing 13 in parallel to the adjusting part 105, the respective piston rod 12 facing one toward the enlarged section 107 of the adjusting part 105 the diameter of the piston rod 12 passes through the coordinated bore of the housing 13 and can be brought into the indirect operative position with the enlarged section 107 of the control element 105.
  • each piston rod 12 is assigned a compression spring 21, which acts between the tapered bottom section of the housing bore for the piston 20 and the piston rod 12 and the piston 20 and thus prestresses the piston rod 12 away from the stroke stop 23.
  • the cylindrical housing 13 is closed with a cylindrical cover 14. This cover 14 receives two air connections 18, one air connection being assigned to a piston 19 and 20, respectively.
  • a central threaded hole in the cover 14 receives a screw 15, which is also provided with a central threaded bore for receiving a set screw 16 for a Bowden cable sleeve 108 (Bowden cable sheathing) of a Bowden cable 8.
  • the Bowden cable core 110 (wire) is guided through a longitudinal bore of the actuating part 105 and is held on the side of the enlarged section 107 of the actuating part 105 facing the stroke stops 23 in an adjusting screw 17 which is screwed into a threaded section of the bore passing through the actuating part 105.
  • the other end of the Bowden cable sleeve 108 is inserted into a recess made in the recess on the side of the mouthpiece guide 2 facing away from the mouthpiece 3 and is supported on a shoulder 109 of the mouthpiece guide 2, while the Bowden cable core 110 is guided through and fixed in a hole associated with the shoulder 109 is connected to the facing end of the mouthpiece 3.
  • the position of the actuator 105 relative to the housing 13 is detected by means of two signal transmitters 24 and 25, which are mounted on a bearing plate 22, which in turn is attached to the outside of the housing 13.
  • the signal generator 24 detects the front position of the mouthpiece 3 shown in FIG. 1, whereas the signal generator 25 detects the rear position of the mouthpiece 3 due to the movement-locking coupling of the mouthpiece 3 and the actuator 105.
  • Signal generators are well known from the prior art, they come for the present invention questions all those signaling devices which are suitable for detecting positions of a body.
  • the pulse of the signal generator 24 or 25 is fed to the screw feeder via an electrical line.
  • the mouthpiece 3 is pressed into the lower position by the compression spring 7, the actuating part 105 being raised up to the stop against the housing 13 via the Bowden cable 8, thereby limiting the stroke of the mouthpiece 3 downwards.
  • a pulse is generated via the signal generator 24 triggered which by means of blown air promotes a screw from the separating device 11 through the feed hose 9 into the collet 5 or the 3-point ball locking sleeve 5a shown on the right, which can be used instead.
  • the mouthpiece 3 When attaching the fixed screw to the screw point, the mouthpiece 3 is pushed in against the force of the compression spring 7 by pressing the screwdriver 1, the screwdriver 1 starting when pressed against the screwdriver blade 6 and screwing the screw 101 into the workpiece 112, which in the figure 2 is shown.
  • the actuating part 105 lowers itself into the position shown in FIG. 2, the signal transmitter 25 reporting the signal "screwing depth reached".
  • the screwdriver 1 is raised, the position as shown and described in FIG. 1 is reached.
  • the two pistons 19 and 20 are not actuated in this version.
  • FIGS. 1 and 2 can be expanded by the functions according to FIG. 3:
  • the actuating part 105 becomes counter to the force of the spring by pressurizing the piston 19 21 against the stop 129 moved downward, as shown in Figure 3.
  • the mouthpiece 3 is raised against the pressure of the spring 7 until the screwdriver blade 6 rests on the screw head.
  • the stroke of the mouthpiece 3 is adjustable by the stroke stop 23. This additional stroke, that is to say the screwdriver blade 6 abuts the head 111, results in a better attachment to the screwing point.
  • the advancement of the screwdriver blade 6 into this position in particular enables the screw 101 to be screwed in easily when it is to be screwed into a workpiece 112 from below.
  • the screwing process takes place as described above and shown in FIG. 2.
  • FIGS. 1 to 3 can be expanded by the function according to FIG. 4: If the compressed air screwdriver 1 is pressed against the screwdriver blade 6 starts, a 3/2-way valve, also not shown, is actuated via a flow monitor, not shown, which causes the piston 20 to be pressurized. (When using an electric screwdriver, this is done via an electrical signal). Here, the actuating part 105 is moved downward and, via the Bowden cable 8, the mouthpiece 3 is moved upward against the spring until the stop of the mouthpiece guide 2, as shown in FIG. When the torque is reached and the rotary screwdriver is thus switched off, the signal is interrupted, the pistons 20, the actuating part 105 and the mouthpiece 3 being returned.
  • the functions according to FIG. 4 can also be selected as individual functions by pressing a button on the electronic control panel.
  • screws 101 can optionally be retightened or loosened.
  • the screw feed is interrupted.
  • the individual versions can be selected on the electronic control panel.
  • the pneumatic screwdriver 1 shown in FIG. 5 is mounted with its screwed-on guide piston 113 and feed piston 114 in a feed housing 115 and screw guide 116 so as to be axially displaceable and secured against rotation by a key 117 arranged in the guide piston 113.
  • the feed housing 115 is provided with a guide groove 119 and the feed piston 114 with a grooved collar 118.
  • the feed piston 114 screwed into the guide piston 113 is drilled through for the pressure medium supply of the screwdriver 1.
  • the reference number 120 denotes a support ring for the Bowden cable 8.
  • the unit 104 also has the actuating part 105 which can be moved in a cylindrical housing 13 and which is designed as a piston rod of a pneumatic cylinder 121.
  • the unit 104 is used for the forward and return stroke of the air pressure rotary screwdriver 1 in the screwdriver guide 116 relative to the mouthpiece 3.
  • the connection between the Bowden cable 8 and the piston rod 115 is made by means of a Bowden cable attachment 122, which can be brought into contact with a stroke-limiting piston 123 in the extension direction of the piston rod 115 is.
  • Reference number 124 denotes an adjusting sleeve with which the stroke of the stroke-limiting piston 123 can be adjusted.
  • the pneumatic cylinder 121 is pressurized with air via a valve 125 on the piston rod side and pulls the rotary screwdriver 1 on the guide piston 113 against the pressure present on the feed piston 114 to the rear via the Bowden cable 8.
  • an impulse is triggered via the signal generator 25, which, by means of blown air, conveys a screw 101 from the separating device 21 through the feed hose 9 into the collet 5 or the 3-point ball locking sleeve 5a.
  • the pneumatic cylinder 121 is vented via the valve 125, as shown in FIG.
  • the reference number 126 denotes an adjustable throttle valve which is assigned to the end of the pneumatic cylinder 121 on the piston side.
  • the stroke can be adjusted by the adjusting sleeve 124.
  • the screwdriver 1 is started by pressing and the screw 101 is screwed into the workpiece.
  • a 3/2-way valve 127 is actuated via a flow monitor in such a way that the stroke-limiting piston 123 is relieved of pressure and the screwdriver 1 thereby reaches the maximum stroke, as shown in FIG.
  • the screwdriver 1 switches off.
  • the unit 104 is reset via a signal from the flow monitor and signal transmitter 24, as shown in FIG. 5, that is to say the actuating part 105, that is to say the piston rod of the pneumatic cylinder 121 is drawn in and the screwdriver 1 is thus withdrawn again.
  • the lifting steps can each take place automatically, with the result that an additional actuation of a switch-on lever, button or bar is omitted.
  • the helicopter screwdriver can be gripped at the lower end, closer to the screwing point.
  • the screwdriver guide 116 which is optionally provided with a handle in the manner of a shrink tube 128, and the feed housing 115 must be manufactured separately, depending on the screwdriver type and screwdriver size. Due to the screwdriver guide and the feed housing, the design is longer and larger in diameter, there is no possibility of variable control functions and no possibility of installing reversible screwdrivers.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Abstract

The invention proposes a powered handtool for applying fasteners (101) which, in a hand-guidable constructional unit (100), has a drive part (1) with an impingement means (6) drivable by the latter, and also a mouthpiece (3). The impingement means, which passes through the mouthpiece, is displaceable relative to the latter and the fasteners can be fed to the mouthpiece by a separator (11). To control the feeding of the fasteners into the mouthpiece, the invention provides a control device (105, 24, 25), arranged outside the constructional unit, and a motional connection (8) between an actuating part (105) of the control device and the mouthpiece or the drive part is provided. The tool furthermore has, outside the constructional unit, a further drive part (12, 19, 20) for displacing impingement means and mouthpiece relative to one another, the further drive part being connected to the mouthpiece or to the drive part in a manner transmitting tensile and/or compressive force. <IMAGE>

Description

Die Erfindung betrifft ein kraftbetriebenes Eintreibgerät für Befestigungsmittel, das in einer handführbaren Baueinheit einen Antriebsteil mit einem von diesem antreibbaren Beaufschlagungsmittel für die Befestigungsmittel sowie ein Mundstück aufweist, wobei das das Mundstück durchsetzende Beaufschlagungsmittel relativ zu diesem verschiebbar ist, und die Befestigungsmittel von einem Vereinzelner dem Mundstück zuführbar sind, sowie mit einer Steuerung zum Steuern der Zuführung der Befestigungsmittel in das Mundstück, wobei die Steuerung ein Stellteil aufweist.The invention relates to a power-driven driving tool for fasteners, which in a hand-held unit has a drive part with an actuating means for the fastening means that can be driven by the latter, and a mouthpiece, wherein the actuating means penetrating the mouthpiece is displaceable relative to the latter, and the fastening means can be moved from a single one to the mouthpiece can be supplied, as well as with a controller for controlling the supply of the fasteners into the mouthpiece, the controller having an actuator.

Unter Befestigungsmittel werden insbesondere Schrauben, Nieten und Nägel verstanden. Das Beaufschlagungsmittel stellt sich bei Verwendung von Schrauben als Befestigungsmittel vornehmlich als Schraubendreherklinge dar, bei Verwendung von Nieten und Nägeln ist das Beaufschlagungsmittel insbesondere als Stößelhammer ausgebildet. Der Antrieb des Eintreibgerätes kann beispielsweise elektrisch oder pneumatisch erfolgen.Fastening means are understood to mean in particular screws, rivets and nails. When using screws as fastening means, the loading means is primarily a screwdriver blade; when using rivets and nails, the loading means is designed in particular as a plunger hammer. The driving tool can be driven, for example, electrically or pneumatically.

Ein gattungsgemäßes Eintreibgerät für Befestigungsmittel ist aus der deutschen Offenlegungsschrift 24 15 241 bekannt. Diese zeigt ein kraftbetriebenes Eintreibgerät, insbesondere Schrauber, bei dem das Mundstück in einer Mundstückführung des einen Antriebsteiles längsverschiebbar geführt ist. In der Betriebsmittelleitung des Vereinzelners ist ein vom Mundstück betätigbarer Umschalter angeordnet, mit dem der Vereinzelner bei leerem Mundstück auf Zuführung und bei gefülltem Mundstück auf Unterbrechung der Zuführung gestellt wird. Im Detail ist ein als 2/2-Wege-Ventil ausgebildeter Kolbenschieber, dessen Durchfluß in der Ausgangsstellung gesperrt ist, im Mundstück des Schraubers quer zur Einschraubrichtung angeordnet, wobei das als Steuerkolben des Kolbenschiebers ausgebildete Stellteil durch an der Mundstückführung angeordnete Steuerkurven von den beiden Steuerkolbenstirnflächen her steuerbar ist und der Steuerkolben in der ausgefahrenen Stellung des Mundstücks an einen Anschlag der Mundstückführung anschlägt, zum Begrenzen des Mundstückausfahrweges.A generic driving tool for fasteners is known from German Offenlegungsschrift 24 15 241. This shows a power-driven driving tool, in particular a screwdriver, in which the mouthpiece is guided so as to be longitudinally displaceable in a mouthpiece guide of the one drive part. A switch which can be actuated by the mouthpiece is arranged in the equipment line of the singler, with which the singler is set to feed when the mouthpiece is empty and to interrupt the feed when the mouthpiece is full. In detail, a piston valve designed as a 2/2-way valve, the flow of which is blocked in the starting position, is arranged in the mouthpiece of the screwdriver transversely to the screw-in direction, the actuating part designed as a control piston of the piston valve being arranged by control cams arranged on the mouthpiece guide from the two control piston faces is controllable and the control piston strikes in the extended position of the mouthpiece against a stop of the mouthpiece guide, to limit the mouthpiece extension path.

Nachteilig ist bei dem beschriebenen, sich als handführbare Baueinheit darstellenden kraftbetriebenen Eintreibgerät, daß die Steuerungselemente zum Steuern der Zuführung der Befestigungsmittel in das Mundstück integriert sind, was einen erheblichen Platzbedarf für das bewegliche Mundstück mit sich bringt. Da das Eintreibgerät während des Arbeitens nicht im Bereich des beweglichen Mundstückes ergriffen werden kann, besteht nur die Möglichkeit, dieses relativ weit entfernt von der Ausgabeöffnung des Eintreibgerätes für die Befestigungsmittel zu ergreifen, womit sich für die Bedienperson ein größerer, nachteiliger Führungsabstand zu den zu befestigenden Bauteilen ergibt und das Eintreibgerät insgesamt schwieriger zu handhaben ist, insbesondere was das Aufsetzen des Eintreibgerätes auf die zu verschraubenden Bauteile betrifft. Abgesehen hiervon kann das Eintreibgerät nur mit Aufwand für andere Anforderungen umgerüstet werden, weil die Steuerung der Zuführung der Befestigungsmittel in die handführbare Baueinheit integriert ist, die in aller Regel ein angepaßtes System von dem einen Antriebsteil und dem Mundstück darstellt.It is disadvantageous in the case of the power-operated driving tool described, which presents itself as a hand-operated unit, that the control elements for controlling the supply of the fastening means are integrated into the mouthpiece, which requires a considerable amount of space for the movable mouthpiece. Since the driving tool cannot be gripped in the area of the movable mouthpiece while working, there is only the possibility of gripping it relatively far from the opening of the driving tool for the fastening means, which results in a larger, disadvantageous guide distance to the components to be fastened for the operator and the driving tool as a whole is more difficult to handle, in particular as regards the placement of the driving tool on the components to be screwed. Apart from this, the driving tool can only be converted for other requirements at great expense, because the control of the supply of the fastening means is integrated in the hand-held unit, which generally represents an adapted system of the one drive part and the mouthpiece.

Aus der US 1 499 887 ist ein kraftbetriebenes Eintreibgerät für Befestigungsmittel bekannt, bei dem die Steuerung zum Steuern der Zuführung der Befestigungsmittel in das Mundststück außerhalb der handführbaren Baueinheit angeordnet ist und eine bewegungsschlüssige Verbindung zwischen einem als Kurvenplatte ausgebildeten Stellteil und dem Antriebsteil vorgesehen ist. Entsprechend der Relativbewegung von Beaufschlagungsmittel und Mundstück verschiebt sich aufgrund der bewegungsschlüssigen Verbindung in Art eines Bowdenzuges die mit zwei Kurven versehene Kurvenplatte und steuert über Finger die Zuführung der Befestigungsmittel in das Mundststück.From US 1 499 887 a power driven driving device for fasteners is known, in which the control for controlling the supply of the fasteners into the mouthpiece is arranged outside the hand-held unit and a movement-locking connection between a control element designed as a cam plate and the drive part is provided. Corresponding to the relative movement of the loading means and the mouthpiece, the cam plate provided with two curves is shifted due to the positive connection in the manner of a Bowden cable and controls the feeding of the fastening means into the mouthpiece via fingers.

Nachteilig ist bei dieser Gestaltung des Eintreibgerätes die komplizierte Gestaltung der Kurvenplatte mit den beiden Kurven, wobei es aufgrund der fest vorgegebenen Kurven nicht möglich ist, die Steuerung zum Steuern der Zuführung der Befestigungsmittel in das Mundstück zu verändern. Abgesehen hiervon erfolgt das axiale Verschieben des Beaufschlagungsmittels ausschließlich beim manuellen Betätigen des Eintreibgerätes. Ein externes Beaufschlagen des Bowdenzuges ist nicht vorgesehen.A disadvantage of this design of the driving tool is the complicated design of the curve plate with the two curves, it being impossible to change the control for controlling the supply of the fastening means into the mouthpiece due to the fixed curves. Apart from this, the axial movement of the loading means takes place only when the driving tool is operated manually. External charging of the Bowden cable is not intended.

Schließlich ist ein Eintreibgerät aus der US 3 648 744 bekannt, bei dem in die Druckluftzufuhr zum Antriebsteil des Eintreibgerätes ein Strömungswächter integriert ist, der über den Luftverbrauch des Antriebsteiles die Vereinzelung der Befestigungsmittel steuert. Hierzu weist der Strömungswächter eine mit einem Vereinzelner verbundene Zweigleitung auf, wobei die dieser Zweigleitung zugeführte Druckluft in Abhängigkeit von der Stellung des eigentlichen Ventiles des Strömungswächters gesteuert wird. Der Strömungswächter ist außerhalb der das Antriebsteil aufweisenden handführbaren Baueinheit angeordnet.Finally, a drive-in device is known from US Pat. No. 3,648,744, in which a flow monitor is integrated in the compressed air supply to the drive part of the drive-in device and controls the separation of the fastening means via the air consumption of the drive part. For this purpose, the flow monitor has a branch line connected to a separator, the latter Compressed air supplied to the branch line is controlled as a function of the position of the actual valve of the flow switch. The flow monitor is arranged outside of the hand-held structural unit which has the drive part.

Es ist Aufgabe der vorliegenden Erfindung, ein kraftbetriebenes Eintreibgerät für Befestigungsmittel zu schaffen, das sich durch eine kompakte Bauweise, insbesondere im Bereich des Mundstückes auszeichnet. Die Steuerung der Zuführung der Befestigungsmittel soll besonders einfach erfolgen und für unterschiedliche Typen von Eintreibgeräten verwendbar sein, ferner soll der Eintreibvorgang mittels der handführbaren Baueinheit besonders einfach und komfortabel vonstatten gehen.It is an object of the present invention to provide a power-driven driving tool for fasteners which is characterized by a compact design, particularly in the area of the mouthpiece. The control of the supply of the fasteners should be particularly simple and can be used for different types of driving tools, and the driving-in process should also be particularly simple and convenient using the hand-operated unit.

Die Erfindung schlägt hierfür ein kraftbetriebenes Eintreibgerät für Befestigungsmittel vor, das in einer handführbaren Baueinheit ein Antriebsteil mit einem von diesem antreibbaren Beaufschlagungsmittel für die Befestigungsmittel, sowie ein Mundstück aufweist, wobei das das Mundstück durchsetzende Beaufschlagungsmittel relativ zu diesem verschiebbar ist, und die Befestigungsmittel von einem Vereinzelner dem Mundstück zuführbar sind, sowie mit einer Steuerung zum Steuern der Zuführung der Befestigungsmittel in das Mundstück, wobei die Steuerung außerhalb der Baueinheit angeordnet ist und eine bewegungsschlüssige Verbindung zwischen einem Stellteil der Steuerung und dem Mundstück oder dem Antriebsteil vorgesehen ist, wobei ferner außerhalb der Baueinheit ein weiteres Antriebsteil zum Verschieben von Beaufschlagungsmittel und Mundstück relativ zueinander vorgesehen ist, sowie das weitere Antriebsteil zug- und/oder druckkraftübertragend mit dem Mundstück oder dem einen Antriebsteil verbunden ist.For this purpose, the invention proposes a power-driven driving-in device for fastening means, which in a hand-held structural unit has a drive part with an actuating means for the fastening means, which can be driven thereby, and a mouthpiece, the actuating means penetrating the mouthpiece being displaceable relative to the latter, and the fastening means by one Individual can be fed to the mouthpiece, as well as with a controller for controlling the supply of the fastening means into the mouthpiece, the controller being arranged outside the structural unit and a movement-locking connection being provided between an actuating part of the control and the mouthpiece or the drive part, furthermore outside the A further drive part for moving the loading means and mouthpiece relative to one another is provided, as well as the further drive part transmitting tension and / or pressure force with the mouthpiece or one Drive part is connected.

Wesentlich ist damit für die Erfindung zunächst, daß die Steuerelemente zum Steuern der Zuführung der Befestigungsmittel in das Mundstück nicht mehr in die handführbare Baueinheit integriert sind, sondern, daß die Steuerung außerhalb der handführbaren Baueinheit angeordnet ist, wobei die Bewegung des Stellteiles der Steuerung, die die Relativbewegung von Beaufschlagungsmittel bzw. Antriebsteil und Mundstück repräsentiert, über die bewegungsschlüssige Verbindung vom Mundstück oder dem Antriebsteil auf das Stellteil übertragen wird. Unter bewegungsschlüssiger Verbindung wird jede Verbindung verstanden, die geeignet ist, die Bewegung des Mundstückes oder des Antriebsteiles linear oder fest über- bzw. untersetzt auf das Stellteil zu übertragen. Die bewegungsschlüssige Verbindung kann damit im weitesten Sinne mittels eines beliebigen Getriebes erfolgen. Sie ist nicht auf eine mechanische Verbindung beschränkt, beispielsweise in Art einer biegsamen Welle, insbesondere eines Bowdenzuges, sondern kann durchaus auch mechanisch oder hydraulisch erfolgen, beispielsweise über eine Schlauchleitung, die ein Fluid aufnimmt, wobei eine Verschiebung des Mundstückes oder des Antriebsteiles zu einer Verdrängung des Fluids in der Leitung führt, mit der Folge, daß das Stellteil eine entsprechende Verdrängung vollführt, und umgekehrt. Voraussetzung hierfür ist allerdings, daß das Fluid im wesentlich inkompressibel ist.It is therefore essential for the invention that the controls for controlling the supply of the fasteners in the mouthpiece are no longer integrated in the hand-held unit, but that the control is arranged outside the hand-held unit, the movement of the control element, the the relative movement of loading means or represents the drive part and mouthpiece, via which a positive connection is transmitted from the mouthpiece or the drive part to the actuating part. A movement-locking connection is understood to mean any connection which is suitable for transmitting the movement of the mouthpiece or the drive part to the actuating part in a linear or fixed manner. The movement-locking connection can thus be made in the broadest sense by means of any gear. It is not limited to a mechanical connection, for example in the form of a flexible shaft, in particular a Bowden cable, but can also be done mechanically or hydraulically, for example via a hose line that receives a fluid, with a displacement of the mouthpiece or the drive part to a displacement leads the fluid in the line, with the result that the actuator performs a corresponding displacement, and vice versa. The prerequisite for this, however, is that the fluid is essentially incompressible.

Wesentlich ist für die Erfindung ferner, daß außerhalb der Baueinheit ein weiteres Antriebsteil zum Verschieben von Beaufschlagungsmittel und Mundstück relativ zueinander vorgesehen ist, wobei das andere Antriebsteil zug- und/oder druckkraftübertragend mit dem Mundstück oder dem einen Antriebsteil verbunden ist. Erfolgt die Verbindung entweder zugkraftübertragend oder druckkraftübertragend, kann die jeweilige Rückstellbewegung mittels eines oder mehreren Federelementen erfolgen. Es wird allerdings als vorteilhaft angesehen, wenn die Verbindung sowohl zug- als auch druckübertragend erfolgt. Zweckmäßig können über das weitere Antriebsteil Stellungen des Mundstückes relativ zum Beaufschlagungsmittel bzw. dem diesem zugeordneten einen Antriebsteil vorgegeben werden. Bei Verwendung eines Eintreibgerät in Art eines Drehschraubes kann beispielsweise eine erste Stellung vorgegeben werden, in der die Schraubendreherklinge durch Beaufschlagung über den weiteren Antrieb am Schraubenkopf der in einer Spannzange des Mundstückes gehaltenen Schraube anliegt und eine zweite Stellung, in der die Schraubendreherklinge die Schraube aus der Spannzange hinausdrückt und vollständig einschraubt. Die genannte erste Stellung ist besonders vorteilhaft beim Ansetzen einer in einer Spannzange bzw. Kugelarretierhülse des Mundstückes fixierten Schraube, um diese anschließend zu verschrauben. Allgemein kann sich in der genannten ersten Stellung aufgrund der Relativposition von Beaufschlagungsmittel und Mundstück das Befestigungsmittel nicht axial in das Mundstück zurückschieben, das heißt, im Fall der Verwendung von Schrauben ist durch die Anlage der Schraubendreherklinge am Schraubenkopf sichergestellt, daß sich die Schraube nicht axial in das Mundstück zurückschieben kann. Von Vorteil ist die genannte Stellung auch dann, wenn mittels der handführbaren Baueinheit über Kopf gearbeitet werden soll, das heißt, das Befestigungsmittel nicht nach unten sondern nach oben aus der Baueinheit ausgegeben werden soll. Grundsätzlich können damit herkömmliche Rückhaltebacken für die Befestigungsmittel entfallen.It is also essential for the invention that a further drive part for displacing the loading means and the mouthpiece relative to one another is provided outside of the structural unit, the other drive part being connected to the mouthpiece or the one drive part in a manner transmitting tension and / or pressure. If the connection is made either to transmit tractive force or to transmit compressive force, the respective return movement can take place by means of one or more spring elements. However, it is considered to be advantageous if the connection is both transmission and pressure transmission. Positions of the mouthpiece relative to the actuating means or the one drive part assigned to it can be expediently specified via the further drive part. When using a driving tool in the manner of a screwdriver, a first position can be specified, for example, in which the screwdriver blade is in contact with the screw head of the screw held in a collet of the mouthpiece by the action of the further drive, and a second position in which the screwdriver blade removes the screw from the Push out the collet and screw it in completely. The first position mentioned is particularly advantageous when attaching a screw fixed in a collet or ball locking sleeve of the mouthpiece in order to subsequently screw it. In general, due to the relative position of the loading means and the mouthpiece, the fastening means cannot move axially back into the mouthpiece in the first position mentioned, that is, in the case of the use of screws, the screwdriver blade is in contact with the screw head to ensure that the screw does not move axially can push the mouthpiece back. The position mentioned is also advantageous if work is to be carried out overhead by means of the hand-held structural unit, that is to say the fastening means are to be discharged from the structural unit not downwards but upwards. In principle, conventional retaining jaws for the fasteners can be dispensed with.

Eine besondere Ausführungsform der Erfindung sieht vor, daß die Verbindung der Steuerung und des weiteren Antriebsteiles mit dem Mundstück oder dem einen Antriebsteil mittels eines gemeinsamen Bowdenzuges erfolgt. Zur Übertragung der Relativbewegung von Beaufschlagungsmittel und Mundstück auf das Stellteil der Steuerung sowie der Bewegung des weiteren Antriebsteiles auf das Mundstück oder den einen Antriebsteil ist damit nur ein einziger Bowdenzug erforderlich, wodurch der apparative Aufwand bei dem erfindungsgemäßen Eintreibgerät sehr gering gehalten werden kann. Grundsätzlich wäre es auch möglich, die Steuerung und das weitere Antriebsteil über separate Bowdenzüge in Verbindung mit der handführbaren Baueinheit zu bringen.A special embodiment of the invention provides that the control and the further drive part are connected to the mouthpiece or the one drive part by means of a common Bowden cable. To transmit the relative movement of the actuating means and the mouthpiece to the control part of the control and the movement of the further drive part to the mouthpiece or the one drive part, only a single Bowden cable is required, which means that the outlay in apparatus for the driving tool according to the invention can be kept very low. In principle, it would also be possible to connect the control and the further drive part to the hand-operated unit via separate Bowden cables.

Zweckmäßig bilden die Steuerung und das weitere Antriebsteil eine weitere Baueinheit. Durch die flexible Verbindung der beiden Baueinheiten, insbesondere über ein gemeinsames Verbindungselement in Art des gemeinsamen Bowdenzuges, kann die weitere Baueinheit beliebig zu der handführbaren Baueinheit aufgestellt werden. Ohne daß es einer Modifizierung der handführbaren Baueinheit für den jeweiligen Einsatzfall bedarf, können alle gewünschten Modifizierungen in die weitere Baueinheit, die die Steuerung und gegebenenfalls das weitere Antriebsteil aufweist, integriert werden. So kann in Abstimmung auf das bei der handführbaren Baueinheit Verwendung findende eine Antriebsteil und dessen Mundstück vorgesehen sein, verstellbare Signalgeber zum Erfassen unterschiedlicher Stellungen des Stellteils vorzusehen oder aber verstellbare Anschläge für die im weiteren Antriebsteil befindlichen bewegbaren Bauteile vorzusehen. Zusätzlich kann die Hublänge des Bowdenzuges über eine Justiervorrichtung veränderbar sein.The control and the further drive part expediently form a further structural unit. Due to the flexible connection of the two structural units, in particular via a common connecting element in the manner of the common Bowden cable, the further structural unit can be set up as desired in relation to the hand-guided structural unit. Without the need to modify the hand-held structural unit for the respective application, all desired modifications can be incorporated in the further structural unit, the control and, if appropriate, the further drive part has to be integrated. For example, in coordination with the drive part and the mouthpiece used in the hand-held unit, it can be provided to provide adjustable signal transmitters for detecting different positions of the actuating part or to provide adjustable stops for the movable components located in the further drive part. In addition, the stroke length of the Bowden cable can be changed using an adjusting device.

Eine besondere Gestaltung sieht vor, daß in einem Gehäuse der weiteren Baueinheit das Stellteil verschiebbar geführt ist, wobei mindestens zwei Signalgeber zum Erfassen der unterschiedlichen Stellungen des Stellteils im Gehäuse gelagert sind, über die der Vereinzeler ansteuerbar ist. Auch der Vereinzeler kann in die weitere Baueinheit integriert sein und über eine Zuführschlauch mit einem Anschluß des Mundstückes zusammenwirken.A special design provides that the actuating part is displaceably guided in a housing of the further structural unit, with at least two signal transmitters for detecting the different positions of the actuating part being mounted in the housing, by means of which the separator can be controlled. The separator can also be integrated in the further structural unit and cooperate with a connection of the mouthpiece via a feed hose.

Gemäß einer ersten grundsätzlichen Gestaltung ist vorgesehen, daß das Stellteil der Steuerung bewegungsschlüssig mit dem Mundstück verbunden ist, während bei einer zweiten grundsätzlichen Gestaltung die bewegungsschlüssige Verbindung zwischen dem Stellteil der Steuerung und dem einen Antriebsteil erfolgt. Die erste grundsätzliche Ausgestaltung kann beispielsweise ein Mundstück aufweisen, das in einer Mundstückführung des einen Antriebsteiles verschiebbar gelagert ist, wobei der Bowdenzug mit einem Ende der Bowdenzugummantelung in dem einen Antriebsteil oder der Mundstückführung sowie mit dem anderen Ende der Ummantelung in einem Gehäuse des weiteren Bauteils gelagert ist, und der Bowdenzugdraht mit einem Ende am Mundstück und mit dem anderen Ende am Stellteil des weiteren Bauteils angreift. Bei der zweiten grundsätzlichen Gestaltung kann beispielsweise das eine Antriebsteil in einem Führungsgehäuse mittels eines in diesem gelagerten Vorschubelementes verschiebbar sein, sowie im Führungsgehäuse das Mundstück gelagert sein, wobei der Bowdenzug mit einem Ende der Bowdenzugummantelung in dem Führungsgehäuse und mit dem anderen Ende der Ummantelung in einem Gehäuse des weiteren Bauteiles gelagert ist, und der Bowdenzugdraht mit einem Ende an dem einen Antriebsteil sowie mit dem anderen Ende am Stellteil des weiteren Bauteiles angreift.According to a first basic design, it is provided that the control part of the control is connected to the mouthpiece in a movement-locking manner, while in a second basic design the movement-locking connection between the control part of the control and the one drive part takes place. The first basic embodiment can have, for example, a mouthpiece which is displaceably mounted in a mouthpiece guide of the one drive part, the Bowden cable being mounted with one end of the Bowden cable casing in the one drive part or the mouthpiece guide and with the other end of the casing in a housing of the further component is, and the Bowden cable wire engages with one end on the mouthpiece and with the other end on the adjusting part of the further component. In the second basic design, for example, the one drive part can be displaceable in a guide housing by means of a feed element mounted therein, and the mouthpiece can be mounted in the guide housing, the Bowden cable with one end of the Bowden cable casing in the guide housing and with the other end of the casing in one Housing of the further component is mounted, and the Bowden cable wire with one end on one drive part and with the other end attacks on the control element of the other component.

Das weitere Antriebsteil weist zweckmäßig mindestens einen über Kraftmittel bewegbaren Stößel zum Beaufschlagen des Stellteiles auf bzw. es ist das Stellteil selbst als Stößel ausgebildet. Vorzugsweise sind der bzw. die Stößel pneumatisch betätigbar und zwei Stößel mit unterschiedlichen stellteilseitigen Stellwegendstellungen vorgesehen. Zum Begrenzen der Stellbewegungen des Stellteiles bzw. des Stößels sollten Anschläge vorhanden sein.The further drive part expediently has at least one plunger which can be moved by means of a force means to act on the actuating part or the actuating part itself is designed as a plunger. Preferably, the plunger or plungers can be actuated pneumatically and two plungers with different end positions on the actuating part side are provided. Stops should be available to limit the actuating movements of the actuating part or the plunger.

Das kraftbetriebene Eintreibgerät gemäß vorstehender Erfindungsbeschreibung weist die außerhalb der handführbaren Baueinheit befindliche Steuerung bzw. das außerhalb gelegene weitere Antriebsteil auf, das mit dem Stellteil der Steuerung zusammenwirkt. Diese externe Anordnung der Komponenten macht es möglich, die Bauteile der handführbaren Baueinheit individuell abzustimmen, so daß die unterschiedlichsten Fabrikate von Antriebsteilen für die handführbare Baueinheit in Verbindung mit unterschiedlichen Mundstückausführungen Verwendung finden können. Wesentlich ist es nur, die Relativbewegung zwischen dem Mundstück und dem einen Antriebsteil bzw. dem von diesem antreibbaren Beaufschlagungsmittel über die bewegungsschlüssige Verbindung extern über die Steuerung darzustellen, die ihrerseits über bekannte Komponenten, insbesondere elektronische Komponenten mit dem gleichfalls aus dem Stand der Technik bekannten Vereinzelner zusammenwirkt, der pro Takt ein Befestigungsmittel dem Mundstück zuführt.The power-driven tacker according to the above description of the invention has the control located outside the hand-held unit or the external drive part located outside, which interacts with the control part of the control. This external arrangement of the components makes it possible to individually match the components of the hand-held unit, so that the most varied makes of drive parts for the hand-held unit can be used in conjunction with different mouthpiece designs. It is only essential to represent the relative movement between the mouthpiece and the one drive part or the actuating means which can be driven by the latter via the movement-locking connection externally via the control, which in turn is via known components, in particular electronic components with the singler also known from the prior art interacts, which feeds a fastener to the mouthpiece per cycle.

Weitere Merkmale der Erfindung sind in den Unteransprüchen, der Beschreibung der Figuren und in den Figuren selbst dargestellt.Further features of the invention are shown in the subclaims, the description of the figures and in the figures themselves.

In den Figuren 1 bis 7 ist die Erfindung für Ausführungsformen eines als Druckluft-Drehschrauber ausgebildeten Eintreibgerätes beispielsweise dargestellt, ohne auf diese Ausführungsformen beschränkt zu sein. Es zeigt:

Figur 1
ein mit einer "Mundstück-Hubvorrichtung" versehenes Eintreibgerät (erste grundsätzliche Gestaltung) in der eingezogenen Stellung des als Schraubendreherklinge ausgebildeten Beaufschlagungsmittels,
Figur 2
das in Figur 1 gezeigte Eintreibgerät in einer fast vollständig ausgefahrenen Stellung der Schraubendreherklinge, bei der diese die Schraube in ein Werkstück eindreht,
Figur 3
das in Figur 1 gezeigte Eintreibgerät, in teilweise ausgefahrener Stellung der Schraubendreherklinge, bei der diese am Kopf der in der Spannzange des Mundstücks gehaltenen Schraube anliegt,
Figur 4
das in Figur 1 gezeigte Eintreibgerät in vollständig ausgefahrener Stellung der Schraubendreherklinge,
Figur 5
ein Eintreibgerät mit einer "Drehschrauber-Hubvorrichtung" (zweite grundsätzliche Gestaltung), in der eingezogenen Stellung der Schraubendreherklinge,
Figur 6
das in Figur 5 gezeigte Eintreibgerät, in einer Stellung der Schraubendreherklinge gemäß Figur 3 und
Figur 7
das in Figur 5 gezeigte Eintreibgerät in einer Stellung der Schraubendreherklinge gemäß Figur 4.
1 to 7 illustrate the invention for embodiments of a driving tool designed as a compressed air screwdriver, for example, without being limited to these embodiments. It shows:
Figure 1
a driving tool provided with a "mouthpiece lifting device" (first basic design) in the retracted position of the loading means designed as a screwdriver blade,
Figure 2
1 in an almost fully extended position of the screwdriver blade, in which the screwdriver screwed the screw into a workpiece,
Figure 3
1, in the partially extended position of the screwdriver blade, in which it rests against the head of the screw held in the collet of the mouthpiece,
Figure 4
1 in the fully extended position of the screwdriver blade,
Figure 5
a driving tool with a "screwdriver lifting device" (second basic design), in the retracted position of the screwdriver blade,
Figure 6
the driving tool shown in Figure 5, in a position of the screwdriver blade according to Figure 3 and
Figure 7
5 in a position of the screwdriver blade according to FIG. 4.

Figur 1 zeigt im linken Bereich die handführbare Baueinheit 100, die den Druckluft-Drehschrauber 1, der in eine Mundstückführung 2 eingesteckt ist, das in der Mundstückführung 2 verschiebbare Mundstück 3 mit Mundstückweiche und Schlauchtülle 4 sowie im Bereich der Austrittsöffnung des Mundstückes 3 eine Spannzange 5 für die in das Mundstück 3 eingeführte Schraube 101 aufweist. Mit der Bezugsziffer 102 ist ein Pneumatikanschluß des Druckluft-Drehschraubers 1 bezeichnet; zum Einschrauben der Schraube 101 weist der Drehschrauber 1 eine Schraubendreherklinge 6 auf. Eine Druckfeder 7 ist zwischen dem Drehschrauber 1 und dem Mundstück 3 wirksam und spannt damit das Mundstück 3 vom Drehschrauber 1 weg vor. Über einen zweckmäßigerweise aus Kunststoff bestehenden, flexiblen Schraubenzuführschlauch 9 ist die Schlauchtülle 4 des Mundstückes 3 mit einem pneumatisch arbeitenden Schraubenzuführgerät 10 verbunden, das eine nicht dargestellte Schraubenzuführeinrichtung und eine elektronische Steuerung hierfür aufweist. Mit der Bezugsziffer 11 ist ein in das Schraubenzuführgerät 10 integrierte Schraubenvereinzelungseinrichtung 11 bezeichnet. Das Schraubenzuführgerät 10 mit Schraubenvereinzelungseinrichtung 11 ist in eine weitere Baueinheit 103 integriert, die gleichfalls ein Aggregat 104 zur Steuerung der Zuführung der Schrauben vom Schraubenzuführgerät 10 zum Mundstück 3 und bei Bedarf die kräftemäßige Beaufschlagung des Mundstückes 3 relativ zum Druckluft-Drehschrauber 1 herbeiführt. Das Aggregat 104, das Mundstück 3 sowie die Mundstückführung 2 und der dargestellte Teil des Schraubenzuführgerätes 10 sind im wesentlichen in einer Schnittdarstellung gezeigt.1 shows in the left area the hand-held assembly 100, the compressed air screwdriver 1, which is inserted into a mouthpiece guide 2, the mouthpiece 3 which can be displaced in the mouthpiece guide 2 with a mouthpiece switch and hose nozzle 4, and a collet 5 in the area of the outlet opening of the mouthpiece 3 for the screw 101 inserted into the mouthpiece 3. The reference number 102 denotes a pneumatic connection of the pneumatic screwdriver 1; the screwdriver 1 has a screwdriver blade 6 for screwing in the screw 101. A compression spring 7 is effective between the screwdriver 1 and the mouthpiece 3 and thus biases the mouthpiece 3 away from the screwdriver 1. About a suitably made of plastic, flexible screw feed hose 9, the hose nozzle 4 of the mouthpiece 3 is connected to a pneumatically operating screw feeder 10, the screw feed device, not shown, and an electronic Control for this has. Reference number 11 denotes a screw separating device 11 integrated in the screw feed device 10. The screw feeder 10 with screw separating device 11 is integrated in a further structural unit 103, which likewise brings about an assembly 104 for controlling the supply of the screws from the screw feeder 10 to the mouthpiece 3 and, if necessary, the forceful application of the mouthpiece 3 relative to the compressed air screwdriver 1. The unit 104, the mouthpiece 3 and the mouthpiece guide 2 and the part of the screw feeder 10 shown are shown essentially in a sectional view.

Das Aggregat 104 weist ein in einem zylindrischen Gehäuse 13 verfahrbares Stellteil 105 auf. Ein Führungsabschnitt 106 des Stellteiles 105 ist auf den Innendurchmesser des Gehäuses 13 abgestimmt, an den Führungsabschnitt 106 schließt sich ein erweiterter Abschnitt 107 des Stellteiles 105 an. In dem den Führungsabschnitt 106 umgebenden Bereich des Gehäuses sind in diesem parallel zum Stellteil 105 zwei Kolben 19 und 20 mit jeweiliger Kolbenstange 12 in entsprechenden Bohrungen des Gehäuses 13 verschieblich gelagert, wobei die jeweilige Kolbenstange 12 eine dem erweiterten Abschnitt 107 des Stellteiles 105 zugewandte, auf den Durchmesser der Kolbenstange 12 abgestimmte Bohrung des Gehäuses 13 durchsetzt und in mittelbare Wirkstellung mit dem erweiterten Abschnitt 107 des Stellteiles 105 bringbar ist. Hierfür sind fluchtend mit den beiden Kolbenstangen 12 zwei verstellbare Hubanschläge 23 in den erweiterten Abschnitt 107 eingeschraubt. Jeder Kolbenstange 12 ist schließlich eine Druckfeder 21 zugeordnet, die zwischen dem sich verjüngenden Bodenabschnitt der Gehäusebohrung für den Kolben 20 und der Kolbenstange 12 sowie dem Kolben 20 wirksam ist und damit die Kolbenstange 12 vom Hubanschlag 23 weg vorspannt. Auf der den Kolbenstangen 12 abgewandten Seite der Kolben 19 und 20 ist das zylindrische Gehäuse 13 mit einem zylindrischen Deckel 14 verschlossen. Dieser Deckel 14 nimmt zwei Luftanschlüsse 18 auf, wobei jeweils ein Luftanschluß einem Kolben 19 bzw. 20 zugeordnet ist. Eine zentrische Gewindebohrung im Deckel 14 nimmt eine Schraube 15 auf, die gleichfalls mit einer zentrischen Gewindebohrung zur Aufnahme einer Stellschraube 16 für eine Bowdenzughülse 108 (Bowdenzugummantelung) eines Bowdenzuges 8 versehen ist. Die Bowdenzugseele 110 (Draht) ist durch eine Längsbohrung des Stellteiles 105 geführt und auf der den Hubanschlägen 23 zugewandten Seite des erweiterten Abschnittes 107 des Stellteiles 105 in einer Stellschraube 17 gehalten, die in einen Gewindeabschnitt der das Stellteil 105 durchsetzenden Bohrung eingeschraubt ist. Das andere Ende der Bowdenzughülse 108 ist auf der dem Mundstück 3 abgewandten Seite der Mundstückführung 2 in eine in diese eingebrachte Ausnehmung eingesteckt und stützt sich an einem Ansatz 109 der Mundstückführung 2 ab, während die Bowdenzugseele 110 durch eine dem Ansatz 109 zugeordnete Bohrung hindurchgeführt und fest mit dem zugewandten Ende des Mundstückes 3 verbunden ist.The unit 104 has an actuating part 105 which can be moved in a cylindrical housing 13. A guide section 106 of the actuating part 105 is matched to the inside diameter of the housing 13; an enlarged section 107 of the actuating part 105 adjoins the guide section 106. In the area of the housing surrounding the guide section 106, two pistons 19 and 20 with respective piston rods 12 are displaceably mounted in corresponding bores of the housing 13 in parallel to the adjusting part 105, the respective piston rod 12 facing one toward the enlarged section 107 of the adjusting part 105 the diameter of the piston rod 12 passes through the coordinated bore of the housing 13 and can be brought into the indirect operative position with the enlarged section 107 of the control element 105. For this purpose, two adjustable stroke stops 23 are screwed into the enlarged section 107 in alignment with the two piston rods 12. Finally, each piston rod 12 is assigned a compression spring 21, which acts between the tapered bottom section of the housing bore for the piston 20 and the piston rod 12 and the piston 20 and thus prestresses the piston rod 12 away from the stroke stop 23. On the side of the pistons 19 and 20 facing away from the piston rods 12, the cylindrical housing 13 is closed with a cylindrical cover 14. This cover 14 receives two air connections 18, one air connection being assigned to a piston 19 and 20, respectively. A central threaded hole in the cover 14 receives a screw 15, which is also provided with a central threaded bore for receiving a set screw 16 for a Bowden cable sleeve 108 (Bowden cable sheathing) of a Bowden cable 8. The Bowden cable core 110 (wire) is guided through a longitudinal bore of the actuating part 105 and is held on the side of the enlarged section 107 of the actuating part 105 facing the stroke stops 23 in an adjusting screw 17 which is screwed into a threaded section of the bore passing through the actuating part 105. The other end of the Bowden cable sleeve 108 is inserted into a recess made in the recess on the side of the mouthpiece guide 2 facing away from the mouthpiece 3 and is supported on a shoulder 109 of the mouthpiece guide 2, while the Bowden cable core 110 is guided through and fixed in a hole associated with the shoulder 109 is connected to the facing end of the mouthpiece 3.

Die Position des Stellteiles 105 relativ zum Gehäuse 13 wird mittels zweier Signalgeber 24 und 25 erfaßt, die auf einer Lagerplatte 22 montiert sind, die ihrerseits außen am Gehäuse 13 befestigt ist. Der Signalgeber 24 erfaßt dabei die in Figur 1 dargestellte vordere Stellung des Mundstückes 3, hingegen der Signalgeber 25 die hintere Stellung des Mundstückes 3 aufgrund der bewegungsschlüssigen Kopplung von Mundstück 3 und Stellteil 105. Signalgeber sind aus dem Stand der Technik hinlänglich bekannt, es kommen für die vorliegende Erfindung all diejenigen Signalgeber in Frage, die geeignet sind, Positionen eines Körpers zu erfassen. Der Impuls des Signalgebers 24 bzw. 25 wird über eine elektrische Leitung dem Schraubenzuführgerät zugeleitet.The position of the actuator 105 relative to the housing 13 is detected by means of two signal transmitters 24 and 25, which are mounted on a bearing plate 22, which in turn is attached to the outside of the housing 13. The signal generator 24 detects the front position of the mouthpiece 3 shown in FIG. 1, whereas the signal generator 25 detects the rear position of the mouthpiece 3 due to the movement-locking coupling of the mouthpiece 3 and the actuator 105. Signal generators are well known from the prior art, they come for the present invention questions all those signaling devices which are suitable for detecting positions of a body. The pulse of the signal generator 24 or 25 is fed to the screw feeder via an electrical line.

Nachfolgend sei die Wirkungsweise der Ausführungsform nach den Figuren 1 bis 4 beschrieben:The mode of operation of the embodiment according to FIGS. 1 to 4 is described below:

Wie in der Figur 1 dargestellt, wird das Mundstück 3 von der Druckfeder 7 in die untere Position gedrückt, wobei über den Bowdenzug 8 das Stellteil 105 bis zum Anschlag gegen das Gehäuse 13 angehoben wird und hierdurch den Hub des Mundstückes 3 nach unten begrenzt. Hierbei wird über den Signalgeber 24 ein Impuls ausgelöst, der mittels Blasluft eine Schraube aus der Vereinzelungsvorrichtung 11 durch den Zuführschlauch 9 in die Spannzange 5 oder die rechts daneben dargestellte 3-Punkt-Kugelarretierhülse 5a fördert, die statt dessen Verwendung finden kann.As shown in FIG. 1, the mouthpiece 3 is pressed into the lower position by the compression spring 7, the actuating part 105 being raised up to the stop against the housing 13 via the Bowden cable 8, thereby limiting the stroke of the mouthpiece 3 downwards. In this case, a pulse is generated via the signal generator 24 triggered which by means of blown air promotes a screw from the separating device 11 through the feed hose 9 into the collet 5 or the 3-point ball locking sleeve 5a shown on the right, which can be used instead.

Beim Ansetzen der fixierten Schraube auf die Schraubstelle wird durch Andruck des Drehschraubers 1 das Mundstück 3 gegen die Kraft der Druckfeder 7 eingeschoben, wobei der Drehschrauber 1 bei Andruck gegen die Schraubendreherklinge 6 startet und die Schraube 101 in das Werkstück 112 eindreht, was in der Figur 2 gezeigt ist. Das Stellteil 105 senkt sich hierbei in die in Figur 2 dargestellte Position, wobei der Signalgeber 25 das Signal "Einschraubtiefe erreicht" meldet. Beim Anheben des Schraubers 1 wird die Position, wie in Figur 1 dargestellt und beschrieben, erreicht. Die beiden Kolben 19 und 20 werden bei dieser Version nicht betätigt.When attaching the fixed screw to the screw point, the mouthpiece 3 is pushed in against the force of the compression spring 7 by pressing the screwdriver 1, the screwdriver 1 starting when pressed against the screwdriver blade 6 and screwing the screw 101 into the workpiece 112, which in the figure 2 is shown. The actuating part 105 lowers itself into the position shown in FIG. 2, the signal transmitter 25 reporting the signal "screwing depth reached". When the screwdriver 1 is raised, the position as shown and described in FIG. 1 is reached. The two pistons 19 and 20 are not actuated in this version.

Die Funktionen nach den Figuren 1 und 2 können durch die Funktionen nach der Figur 3 erweitert werden: Nach der Förderung der Schraube in die Spannzange 5 oder die 3-Punkt-Kugelarretierhülse 5a wird durch Druckbeaufschlagung des Kolbens 19 das Stellteil 105 gegen die Kraft der Feder 21 gegen den Anschlag 129 nach unten bewegt, wie in Figur 3 dargestellt. Über den Bowdenzug 8 wird hierbei das Mundstück 3 gegen den Druck der Feder 7 so weit angehoben, bis die Schraubendreherklinge 6 am Schraubenkopf anliegt. Der Hubweg des Mundstücks 3 ist durch den Hubanschlag 23 justierbar. Durch diesen Zusatzhub, das heißt die Anlage der Schraubendreherklinge 6 am Kopf 111, wird ein besseres Ansetzen auf die Schraubstelle erreicht. Der Vorschub der Schraubendreherklinge 6 in diese Position ermöglicht insbesondere ein einfaches Einschrauben der Schraube 101, wenn diese von unten in ein Werkstück 112 einzuschrauben ist. Der Schraubvorgang erfolgt wie vorstehend beschrieben und in Figur 2 dargestellt.The functions according to FIGS. 1 and 2 can be expanded by the functions according to FIG. 3: After the screw has been conveyed into the collet 5 or the 3-point ball locking sleeve 5a, the actuating part 105 becomes counter to the force of the spring by pressurizing the piston 19 21 against the stop 129 moved downward, as shown in Figure 3. About the Bowden cable 8, the mouthpiece 3 is raised against the pressure of the spring 7 until the screwdriver blade 6 rests on the screw head. The stroke of the mouthpiece 3 is adjustable by the stroke stop 23. This additional stroke, that is to say the screwdriver blade 6 abuts the head 111, results in a better attachment to the screwing point. The advancement of the screwdriver blade 6 into this position in particular enables the screw 101 to be screwed in easily when it is to be screwed into a workpiece 112 from below. The screwing process takes place as described above and shown in FIG. 2.

Die Funktionen nach den Figuren 1 bis 3 können durch die Funktion nach Figur 4 erweitert werden: Wenn bei Andruck gegen die Schraubendreherklinge 6 der Druckluft-Drehschrauber 1 startet, wird über einen nicht dargestellten Strömungswächter ein gleichfalls nicht gezeigtes 3/2-Wegeventil betätigt, das die Druckbeaufschlagung des Kolbens 20 bewirkt. (Bei Verwendung eines Elektro-Drehschraubers erfolgt dies über ein elektrisches Signal). Hierbei wird das Stellteil 105 nach unten und über den Bowdenzug 8 das Mundstück 3 gegen die Feder bis gegen den Anschlag der Mundstückführung 2 nach oben bewegt, wie in Figur 4 dargestellt. Bei Erreichen des Drehmomentes und damit Abschalten des Drehschraubers wird das Signal unterbrochen, wobei die Rückführungen des Kolbens 20, des Stellteiles 105 und des Mundstückes 3 erfolgen.The functions according to FIGS. 1 to 3 can be expanded by the function according to FIG. 4: If the compressed air screwdriver 1 is pressed against the screwdriver blade 6 starts, a 3/2-way valve, also not shown, is actuated via a flow monitor, not shown, which causes the piston 20 to be pressurized. (When using an electric screwdriver, this is done via an electrical signal). Here, the actuating part 105 is moved downward and, via the Bowden cable 8, the mouthpiece 3 is moved upward against the spring until the stop of the mouthpiece guide 2, as shown in FIG. When the torque is reached and the rotary screwdriver is thus switched off, the signal is interrupted, the pistons 20, the actuating part 105 and the mouthpiece 3 being returned.

Die Funktionen nach Figur 4 können auch als Einzelfunktion durch Tastendruck um Tableau der elektronischen Steuerung gewählt werden. Mit der aus der Spannzange 5 oder Kugelarretierhülse 5a herausragenden Schraubendreherklinge 6 können gegebenenfalls Schrauben 101 nachgezogen oder gelöst werden. Die Schraubenzuführung ist hierbei unterbrochen. Die einzelnen Versionen sind am Tableau der elektronischen Steuerung wählbar.The functions according to FIG. 4 can also be selected as individual functions by pressing a button on the electronic control panel. With the screwdriver blade 6 protruding from the collet 5 or ball locking sleeve 5a, screws 101 can optionally be retightened or loosened. The screw feed is interrupted. The individual versions can be selected on the electronic control panel.

Im Sinne der vorbeschriebenen Ausführungsform können fast alle handelsüblichen Drehschrauber mit Selbststart bei Andruck (Rechtslauf oder umsteuerbar) sowie wahlweise pneumatische Einschlaghämmer oder Niethämmer mit Selbststart bei Andruck ohne jegliche Veränderungen mittels Adapter am Mundststück angeordnet werden. Je nach Einsatzfall können die einzelnen Funktionsprogramme am Tableau der elektronischen Steuerung eingestellt werden. Die jeweiligen Hubschritte erfolgen automatisch, womit das zusätzliche Betätigen eines Einschalthebels, -knopf oder -leiste entfällt. Der Bowdenzug ist sowohl Steuerelement als auch Kraftelement, das heißt, er vereinigt Sensorik und Aktorik in sich.In the sense of the above-described embodiment, almost all commercially available screwdrivers with self-start when pressed (clockwise rotation or reversible) as well as optionally pneumatic impact hammers or rivet hammers with self-start when pressed without any changes using an adapter on the mouthpiece. Depending on the application, the individual function programs can be set on the electronic control panel. The respective lifting steps take place automatically, which means that there is no additional actuation of a switch, button or bar. The Bowden cable is both a control element and a force element, which means that it combines sensors and actuators.

Bezüglich der in den Figuren 5 bis 7 gezeigten, zweiten grundsätzlichen Gestaltung des Eintreibgerätes mit der Variante nach den Figuren 1 bis 4 übereinstimmende Bauteile sind der Einfachheit halber mit gleichen Bezugsziffern bezeichnet.With regard to the second basic design of the driving tool shown in FIGS. 5 to 7, components which correspond to the variant according to FIGS. 1 to 4 are denoted by the same reference numerals for the sake of simplicity.

Der in der Figur 5 gezeigte Druckluft-Drehschrauber 1 ist mit seinem aufgeschraubten Führungskolben 113 und Vorschubkolben 114 in einem Vorschubgehäuse 115 und Schraubenführung 116 axial verschiebbar gelagert und durch eine im Führungskolben 113 angeordnete Paßfeder 117 auf Verdrehung gesichert. Zusätzlich ist das Vorschubgehäuse 115 mit einer Führungsnut 119 und der Vorschubkolben 114 mit einer Nutringmanschette 118 versehen. Der im Führungskolben 113 eingeschraubte Vorschubkolben 114 ist für die Druckmittelzuführung des Drehschraubers 1 durchbohrt. Mit der Bezugsziffer 120 ist ein Stützring für den Bowdenzug 8 bezeichnet.The pneumatic screwdriver 1 shown in FIG. 5 is mounted with its screwed-on guide piston 113 and feed piston 114 in a feed housing 115 and screw guide 116 so as to be axially displaceable and secured against rotation by a key 117 arranged in the guide piston 113. In addition, the feed housing 115 is provided with a guide groove 119 and the feed piston 114 with a grooved collar 118. The feed piston 114 screwed into the guide piston 113 is drilled through for the pressure medium supply of the screwdriver 1. The reference number 120 denotes a support ring for the Bowden cable 8.

Das Aggregat 104 weist auch bei der Ausführungsform nach den Figuren 5 bis 7 das in einem zylindrischen Gehäuse 13 verfahrbare Stellteil 105 auf, das als Kolbenstange eines Pneumatikzylinders 121 ausgebildet ist. Das Aggregat 104 dient dem Vorund Rückhub des Luftdruck-Drehschraubers 1 in der Schrauberführung 116 relativ zum Mundstück 3. Die Verbindung zwischen dem Bowdenzug 8 und der Kolbenstange 115 erfolgt mittels einer Bowdenzugeinhängung 122, die in Ausfahrrichtung der Kolbenstange 115 in Anlage an einen Hubbegrenzungskolben 123 bringbar ist. Mit der Bezugsziffer 124 ist eine Stellhülse bezeichnet, mit der der Hubweg des Hubbegrenzungskolbens 123 justierbar ist.In the embodiment according to FIGS. 5 to 7, the unit 104 also has the actuating part 105 which can be moved in a cylindrical housing 13 and which is designed as a piston rod of a pneumatic cylinder 121. The unit 104 is used for the forward and return stroke of the air pressure rotary screwdriver 1 in the screwdriver guide 116 relative to the mouthpiece 3. The connection between the Bowden cable 8 and the piston rod 115 is made by means of a Bowden cable attachment 122, which can be brought into contact with a stroke-limiting piston 123 in the extension direction of the piston rod 115 is. Reference number 124 denotes an adjusting sleeve with which the stroke of the stroke-limiting piston 123 can be adjusted.

Wie in Figur 5 dargestellt, ist in der Ausgangsstellung der Pneumatikzylinder 121 kolbenstangenseitig über ein Ventil 125 mit Luft beaufschlagt und zieht über den Bowdenzug 8 den Drehschrauber 1 am Führungskolben 113 gegen den anstehenden Druck auf den Vorschubkolben 114 nach hinten. Hierbei wird über den Signalgeber 25 ein Impuls ausgelöst, der mittels Blasluft eine Schraube 101 aus der Vereinzelungsvorrichtung 21 durch den Zuführschlauch 9 in die Spannzange 5 oder die 3-Punkt-Kugelarretierhülse 5a fördert. Nach der Positionierung der Schraube 101 im Mundstück 3 wird, wie in Figur 6 dargestellt, der Pneumatikzylinder 121 über das Ventil 125 entlüftet, wobei durch den Vorschubdruck des Vorschubkolbens 114 über den Bowdenzug 8 die Kolbenstange 105 des Pneumatikzylinders 121 bis gegen den Hubbegrenzungskolben 123 ausgezogen wird. Der hierbei bedingte Hub des Drehschraubers 1 bewirkt ein Anliegen der Schraubendreherklinge 6 am Kopf 111 der Schraube 101. Mit der Bezugsziffer 126 ist ein regelbares Drosselventil bezeichnet, das dem kolbenseitigen Ende des Pneumatikzylinders 121 zugeordnet ist.As shown in FIG. 5, in the initial position the pneumatic cylinder 121 is pressurized with air via a valve 125 on the piston rod side and pulls the rotary screwdriver 1 on the guide piston 113 against the pressure present on the feed piston 114 to the rear via the Bowden cable 8. In this case, an impulse is triggered via the signal generator 25, which, by means of blown air, conveys a screw 101 from the separating device 21 through the feed hose 9 into the collet 5 or the 3-point ball locking sleeve 5a. After the screw 101 has been positioned in the mouthpiece 3, the pneumatic cylinder 121 is vented via the valve 125, as shown in FIG. 6, the piston rod 105 of the pneumatic cylinder 121 being pulled out against the stroke-limiting piston 123 by the feed pressure of the feed piston 114 via the Bowden cable 8 . The conditional here Stroke of the screwdriver 1 causes the screwdriver blade 6 to bear against the head 111 of the screw 101. The reference number 126 denotes an adjustable throttle valve which is assigned to the end of the pneumatic cylinder 121 on the piston side.

Durch die Stellhülse 124 ist der Hubweg justierbar. Beim Ansetzen der fixierten Schraube 101 auf die Schraubstelle wird durch Andruck der Drehschrauber 1 gestartet und die Schraube 101 in das Werkstück eingedreht. Wenn der Drehschrauber 1 startet, wird über einen Strömungswächter ein 3/2-Wegeventil 127 so betätigt, daß der Hubbegrenzungskolben 123 druckentlastet wird und hierdurch der Drehschrauber 1 den maximalen Hub erreicht, wie es in der Figur 7 dargestellt ist. Bei Erreichen des eingestellten Drehmomentes schaltet der Drehschrauber 1 ab. Über ein Signal vom Strömungswächter und Signalgeber 24 erfolgt die Rückstellung des Aggregates 104, wie in Figur 5 dargestellt, das heißt, es wird das Stellteil 105, das heißt, die Kolbenstange des Pneumatikzylinders 121 eingezogen und der Drehschrauber 1 damit wieder zurückgezogen.The stroke can be adjusted by the adjusting sleeve 124. When the fixed screw 101 is placed on the screwing point, the screwdriver 1 is started by pressing and the screw 101 is screwed into the workpiece. When the screwdriver 1 starts, a 3/2-way valve 127 is actuated via a flow monitor in such a way that the stroke-limiting piston 123 is relieved of pressure and the screwdriver 1 thereby reaches the maximum stroke, as shown in FIG. When the set torque is reached, the screwdriver 1 switches off. The unit 104 is reset via a signal from the flow monitor and signal transmitter 24, as shown in FIG. 5, that is to say the actuating part 105, that is to say the piston rod of the pneumatic cylinder 121 is drawn in and the screwdriver 1 is thus withdrawn again.

Bei der zuletzt beschriebenen Ausführungsform können die Hubschritte jeweils automatisch erfolgen, womit eine zusätzliche Betätigung eines Einschalthebels, -knopf oder -leiste entfällt. Gegenüber der Bauform der Mundstück-Hubvorrichtung kann der Hub-Drehschrauber am unteren Ende, näher der Schraubstelle, gegriffen werden. Allerdings müssen bei der zuletzt beschriebenen Ausführungsform die Schrauberführung 116, die gegebenenfalls mit einem Handgriff in Art eines Schrumpfschlauches 128 versehen ist, sowie das Vorschubgehäuse 115 je nach Schraubertype und Schraubergröße gesondert gefertigt werden. Bedingt durch die Schrauberführung und das Vorschubgehäuse ist die Bauform länger und im Durchmesser größer, es besteht keine Möglichkeit variabler Steuerfunktionen und keine Möglichkeit, umsteuerbare Drehschrauber einzubauen.In the embodiment described last, the lifting steps can each take place automatically, with the result that an additional actuation of a switch-on lever, button or bar is omitted. Compared to the design of the mouthpiece lifting device, the helicopter screwdriver can be gripped at the lower end, closer to the screwing point. However, in the last-described embodiment, the screwdriver guide 116, which is optionally provided with a handle in the manner of a shrink tube 128, and the feed housing 115 must be manufactured separately, depending on the screwdriver type and screwdriver size. Due to the screwdriver guide and the feed housing, the design is longer and larger in diameter, there is no possibility of variable control functions and no possibility of installing reversible screwdrivers.

Claims (12)

  1. Powered driving-in tool for fasteners (101) which has in a hand-guided construction unit (100) a drive part (1), having an application means (6) for the fasteners (101) which is drivable by the drive part (1), as well as a mouthpiece (3), in which arrangement the application means (6), which passes through the mouthpiece (3), is displaceable relative to the latter, and the fasteners (101) can be fed to the mouthpiece (3) from a separating device (11), and having a control means (105, 24, 25) for controlling the feeding of the fasteners (101) into the mouthpiece (3), characterized in that the control means (105, 24, 25) is arranged outside the construction unit (100), and a motional connection (8) is provided between an actuating part (105) of the control means (105, 24, 25) and the mouthpiece (3) or the drive part (1), and a further drive part (12, 19, 20; 121) for displacing the application means (6) and the mouthpiece (3) relative to one another is provided outside the construction unit (100), and the further drive part (12, 19, 20; 121) is connected to the mouthpiece (3) or the one drive part (1) in such a way as to transmit a pulling and/or a pushing force.
  2. Driving-in tool according to Claim 1, in which positions of the mouthpiece (3) relative to the application means (6) can be preset by means of the further drive part (12, 19, 20; 121).
  3. Driving-in tool according to Claim 2, in which the control means (105, 24, 25) and the further drive part (12, 19, 20; 121) form a further construction unit (104).
  4. Driving-in tool according to Claim 2 or 3, in which the control means (105, 24, 25) and the further drive part (12, 19, 20; 121) are connected to the mouth-piece (3) or one drive part (1) by means of a common Bowden cable (8).
  5. Driving-in tool according to Claim 4, in which the length of displacement of the Bowden cable (8) can be varied via an adjusting device (16, 17; 16, 122).
  6. Driving-in tool according to Claim 4 or 5, in which the actuating part (105) is displaceably guided in a housing (13) of the further construction unit (104), at least two signal transmitters (24, 25) for detecting different positions of the actuating part (105) being mounted in the housing (13), via which signal transmitters (24, 25) the separating device (11) can be activated.
  7. Driving-in tool according to one of Claims 2 to 6, in which the further drive part (12, 19, 20; 121) has at least one plunger (12), movable in a powered manner, for acting upon the actuating part (105), or the actuating part (105) itself is designed as a plunger.
  8. Driving-in tool according to Claim 7, in which the plunger or plungers (12; 105) can be actuated pneumatically.
  9. Driving-in tool according to Claim 7 or 8, in which two plungers (12) are provided with different actuating-travel end positions on the actuating-part side.
  10. Driving-in tool according to one of Claims 7 to 9, in which stops (23, 123) are provided for limiting the actuating movement of the actuating part (105) or plunger (12).
  11. Driving-in tool according to one of Claims 4 to 10, in which the mouthpiece (3) is displaceably mounted in a mouthpiece guide (2) of the one drive part (1), the Bowden cable (8) being mounted with one end of the Bowden-cable sheathing (108) in the one drive part (1) or the mouthpiece guide (2) and with the other end of the sheathing (108) in a housing (13) of the further construction unit (104), and the Bowden-cable wire (110) acting with one end on the mouthpiece (3) and with the other end on the actuating part (105) of the further construction unit (104).
  12. Driving-in tool according to one of Claims 4 to 10, in which the one drive part (1) is displaceable in a guide housing (116) by means of an advancement element (114) mounted in the latter, and the mouthpiece (3) is also mounted in the guide housing (116), the Bowden cable (8) being mounted with one end of the Bowden-cable sheathing (108) in the guide housing (116) and with the other end of the sheathing (108) in a housing (13) of the further construction unit (104), and the Bowden-cable wire (110) acting with one end on the one drive part (1) and with the other end on the actuating part (105) of the further construction unit (104).
EP94100868A 1993-01-25 1994-01-21 Powered handtool for applying fasteners Expired - Lifetime EP0608782B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4301858A DE4301858A1 (en) 1993-01-25 1993-01-25 Power driven fastener driving tool
DE4301858 1993-01-25

Publications (2)

Publication Number Publication Date
EP0608782A1 EP0608782A1 (en) 1994-08-03
EP0608782B1 true EP0608782B1 (en) 1997-05-07

Family

ID=6478831

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94100868A Expired - Lifetime EP0608782B1 (en) 1993-01-25 1994-01-21 Powered handtool for applying fasteners

Country Status (4)

Country Link
EP (1) EP0608782B1 (en)
AT (1) ATE152658T1 (en)
DE (2) DE4301858A1 (en)
ES (1) ES2103091T3 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5890405A (en) * 1996-09-11 1999-04-06 Becker; Burkhard Automated screw driving device
DK180108B1 (en) * 2018-11-19 2020-05-05 Atg Snappex Aps A device and a method for inserting a mounting screw in floor insulation, and the use thereof
DE102020126189A1 (en) * 2020-10-07 2022-04-07 HELLA GmbH & Co. KGaA Device for the automated production of screw connections

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1499887A (en) * 1919-08-25 1924-07-01 Reynolds Machine Company Screw-driving machine
US2973021A (en) * 1957-08-12 1961-02-28 United Shoe Machinery Corp Power operated fastener feeding and applying devices
DE1478906B2 (en) * 1963-10-28 1976-07-15 Uniquick GietzeltKG, 4831 Marienfeld AIR-OPERATED HANDHELD SCREWDRIVER WITH AUTOMATIC SCREW FEEDING
GB1224780A (en) * 1968-06-26 1971-03-10 Churchill Charles Ltd Improvements in apparatus for positioning articles for application to objects
US3648744A (en) * 1970-02-17 1972-03-14 Ingersoll Rand Co Flow sensing valve
DE2415241C2 (en) * 1974-03-29 1983-12-08 Herbert 6228 Eltville Fehlings Power-operated driving tool, in particular screwdriver, in which the fastening means can be fed to the driving tool by a separator
DE3403961A1 (en) * 1984-02-04 1985-08-14 Josef-Gerhard 4030 Ratingen Tünkers Pneumatically or hydraulically operatable toggle clamping device for the clamping of body components
IT1216607B (en) * 1988-04-20 1990-03-08 Mario Zucchelli AUTOMATIC SELF-ADVANCING MACHINE FOR THE APPLICATION OF INSERTS.
DE3916626A1 (en) * 1989-05-22 1990-11-29 Hohe Kg Automatic screwdriver with partially conductive screw-holder - performs DC continuity check in switching circuit completed by correct positioning of screw under tool bit

Also Published As

Publication number Publication date
ATE152658T1 (en) 1997-05-15
DE59402622D1 (en) 1997-06-12
EP0608782A1 (en) 1994-08-03
ES2103091T3 (en) 1997-08-16
DE4301858A1 (en) 1994-07-28

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