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EP0747180A1 - Drilling support with feeding arrangement for hand-held drilling machine - Google Patents

Drilling support with feeding arrangement for hand-held drilling machine Download PDF

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Publication number
EP0747180A1
EP0747180A1 EP95630053A EP95630053A EP0747180A1 EP 0747180 A1 EP0747180 A1 EP 0747180A1 EP 95630053 A EP95630053 A EP 95630053A EP 95630053 A EP95630053 A EP 95630053A EP 0747180 A1 EP0747180 A1 EP 0747180A1
Authority
EP
European Patent Office
Prior art keywords
rod
support
spring
friction roller
drill
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.)
Withdrawn
Application number
EP95630053A
Other languages
German (de)
French (fr)
Inventor
Armand Lang
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.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to EP95630053A priority Critical patent/EP0747180A1/en
Priority to US08/650,617 priority patent/US5676503A/en
Priority to JP8150236A priority patent/JPH08332628A/en
Priority to AU52436/96A priority patent/AU5243696A/en
Priority to CA002177202A priority patent/CA2177202A1/en
Publication of EP0747180A1 publication Critical patent/EP0747180A1/en
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H1/00—Work benches; Portable stands or supports for positioning portable tools or work to be operated on thereby
    • B25H1/0021—Stands, supports or guiding devices for positioning portable tools or for securing them to the work
    • B25H1/0035—Extensible supports, e.g. telescopic
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S408/00—Cutting by use of rotating axially moving tool
    • Y10S408/712—Drill press adapted to use portable hand drill
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/65—Means to drive tool
    • Y10T408/675—Means to drive tool including means to move Tool along tool-axis
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/91—Machine frame

Definitions

  • the invention relates to a drill stand with an automatic feed device for a drilling machine, in particular for producing boreholes in concrete ceilings or the like.
  • Concrete ceilings are usually drilled from the bottom up so that the drilling dust can fall freely out of the borehole due to gravity.
  • the drilling work requires a lot of effort, since the drilling machine has to be pushed upwards manually. At the same time, the worker is exposed to the drilling dust falling out of the borehole. The work is not harmless as a result of the long drill tending to vibrate and damage to health through inhalation of the dust can also occur.
  • Drilling stands with automatic, hydraulic feed devices are already known to press the drilling machine against the concrete ceiling. Such hydraulic feed devices are structurally complex and accordingly expensive to buy. They are therefore only suitable for relatively large, heavy drilling machines for the production of large diameter concrete openings. Hydraulic feed devices have not previously been used in connection with hand drills for drilling smaller holes in concrete ceilings.
  • the object of the invention is to provide a portable, simple and light drill stand with an automatic feed device for a hand drill, so that concrete breakthroughs can be made without manual effort and without dust pollution while avoiding the disadvantages mentioned above.
  • the invention provides a drill stand with a length-adjustable support consisting of two telescopically adjustable rods, with a support device for a drill, which is axially displaceably guided on one of the two rods, and an axially movable, lockable adjustment unit for advancing the support device in Direction to the drilling point via a feed pressure spring arranged between the support device and the adjustment unit, wherein when a drill clamped in the drilling machine is applied to the drilling point, a feed force is to be exerted on the support device by compressing the feed pressure spring via the adjustment unit.
  • the drill stand To drill a concrete hole, the drill stand is set up between the floor and the concrete ceiling and adjusted to the height of the room by changing the length and finally firmly clamped between the floor and the ceiling. Then, by actuating the adjustment unit, the carrying device with the drill is moved upwards via the feed pressure spring until the drill touches the ceiling. The adjustment unit is then moved further upwards, which compresses the spring until it presses the drill against the ceiling with the required feed force. The drill stand is now set up and the drill can be switched on via a remote control. After the ceiling has been pierced, the drill is switched off again via the remote control and the adjusting unit is moved down again to relax the feed spring and remove the drill from the drilling point. Concrete piercing can therefore be done without manual effort and free of Dust pollution can be carried out with a simple drill stand.
  • length-adjustable supports can be used as drill stands, such as those used to set up formwork. These supports usually consist of a lower standpipe or a lower rod in which an upper rod is slidably received. In addition, these known supports have a device for changing the length of the support. It is only necessary to provide the support device for the drilling machine, the adjustment unit and the feed compression spring on the upper rod.
  • the feed compression spring can be a helical spring which is arranged around the boring bar.
  • the adjusting unit can have a threaded ring on the upper rod, which is seated on a threaded section of the upper rod.
  • the threaded ring can be locked on the upper rod after lifting the carrying device with the drill and compressing the feed pressure spring.
  • the adjustment unit preferably has a first adjustment head which can be displaced on the rod and in which a rotatable friction roller is mounted, which can be wedged self-locking between a running surface of the rod and inclined surfaces of the adjustment head under the load of the feed compression spring and is spring-loaded in the direction of the wedge point is, by driving the friction roller from the outside to move the adjustment head on the rod to advance the support device to the drilling point and to compress the feed compression spring and the friction roller against the spring load is movable away from the wedge point to the feed compression spring by displacement to relax on the rod in the opposite direction of the adjustment head and to move the carrying device away from the drilling point.
  • the friction roller can be mounted in longitudinal holes arranged obliquely to the longitudinal axis of the support and can be gripped on both sides of the adjustment head by a guide element which is provided with a handle, the inclined surfaces being formed by side surfaces of the longitudinal holes which converge in the feed direction towards the running surface of the rod and a spring is arranged between the guide member and the adjustment head, which presses the friction roller towards the wedge point.
  • the device for changing the length of the support can consist of a friction drive with a second adjustment head which is integrally formed on the lower rod.
  • An adjustment head with a friction drive for a length-adjustable support is described for example in DE-PS 26 30 446.
  • a rotatable friction roller is mounted which, under the action of the load through the upper rod, can be locked in a self-locking manner between a running surface of the upper rod and inclined surfaces of the adjustment head and is spring-loaded in the direction of the wedge point.
  • the support is extended by driving the friction roller by extending the upper rod from the lower rod and to shorten the length of the support, the friction roller is moved away from the wedge point against the spring load, after which the upper rod can simply be pushed back into the lower rod .
  • this second adjustment head with friction drive
  • the first adjustment head for the support device of the drilling machine and the second adjustment head for changing the length of the support are essentially identical in construction, with the exception that the first adjustment head can be moved on one rod (the inner, upper rod) and the second adjustment head on the other rod (the outer, lower rod) molded, z. B. is welded.
  • the oblique wedge surfaces of the first adjustment head converge towards the tread of the inner rod in the upward direction toward the feed compression spring, while the oblique wedge surfaces of the second adjustment head converge in the opposite direction towards the tread of the inner rod.
  • the two adjustment heads are thus rotated by 180 ° with respect to one another.
  • the drill stand has a lower outer hollow rod 2 and an upper inner hollow rod 4, which is received telescopically in the lower inner rod 2.
  • the rods 2 and 4 are displaced in the longitudinal direction relative to one another.
  • the lower rod 2 has on her lower end a widened foot part 2a and the upper rod has a widened head part 4a at its upper end.
  • a support device 10 with a chuck 20 for a drilling machine 30 is slidably arranged on the upper rod 4.
  • the carrying device 10 has a sleeve 12 which is adapted in its cross-sectional shape to the cross-sectional shape of the rod 4.
  • both rods 2, 4 have a square shape, other shapes, such as. B. circular rods are also conceivable.
  • the chuck 20 can be adjustable in the radial and circumferential directions with respect to the support.
  • An adjustment unit 40 is provided below the support device 10 on the upper rod 4 and can be blocked on the rod 4.
  • a feed compression spring 50 is arranged on the upper rod 4 between the adjustment unit 40 and the carrying device 10.
  • a first spring seat ring 52 is located between the upper end of the spring 50 and the support device 10 and a second spring seat ring 54 is located between the lower end of the spring 50 and the adjustment unit 40.
  • the adjustment unit 40 has a first adjustment head 100 with a friction drive.
  • the friction drive has a friction roller 102, which in longitudinal holes 104 in the front wall 106 and in the rear wall 108 of the adjustment head 100 is stored.
  • the longitudinal holes 104 are arranged at an acute angle ⁇ to the longitudinal axis xx of the support, the angular tip being directed towards the head part 4a of the upper inner rod 4.
  • the friction roller 102 has a central part 102a which bears against the tread 4 'of the inner upper rod 4.
  • the friction roller 102 has end parts 102b of larger diameter on both sides of the central part 102a, which overlap opposite side surfaces of the upper inner rod 4 and are slidably received and guided in the longitudinal holes 104.
  • the adjustment head 100 is pressed down and over the oblique wedge surfaces 104 'of the longitudinal holes 104, which converge upwards towards the tread 4' of the upper rod 4, the friction roller 102 between the tread 4 'of the upper inner Rod 4 and the wedge surfaces 104 'of the longitudinal holes 104 facing and opposing the tread 4' are wedged or blocked.
  • a guide member 130 is mounted on the adjustment head 100 by means of a pivot pin 132 on lugs 134 about a horizontal axis y-y.
  • the guide member 130 is U-shaped with two legs 130a, 130b, which overlap the front wall 106 and the rear wall 108 of the adjusting head 100 and are provided at their free end with semicircular cutouts 134a, in which the end parts 102b of the friction roller 102 are received are.
  • the front leg 130a is shown broken or broken away.
  • a handle 136 is provided on the web 130c of the U-shaped guide member 130.
  • a coil spring 138 sits on the pivot pin 132 and presses the guide member 130 clockwise and accordingly the friction roller 102 in the longitudinal holes 104 upwards towards the wedge point between the tread 4 'and the wedge surfaces 104'.
  • a hand crank 140 is pivotally received in a transverse bore of the friction roller 102.
  • the adjustment head 100 on the inner rod 4 moves upwards to raise the drilling machine 30 and compress the feed spring 50.
  • the friction roller 102 in the longitudinal holes 104 is moved downward away from the wedge point moved and the adjusting head 100 can be freely moved down on the upper rod to relax the feed spring 50 and lower the drilling machine 30.
  • the adjusting head 100 has an extension sleeve 142 which is adapted in its cross-sectional shape to the upper rod 4 and is non-rotatably guided thereon.
  • the lower spring seat ring 54 lies on the upper end of the extension sleeve 142.
  • a second adjustment head 100 ' is provided with a friction drive, which essentially corresponds to the first adjustment head 100 for lifting the carrying device 10 and compressing the spring 50, with the exception that the second adjustment head 100' is rotated by 180 degrees with respect to the first adjustment head 100, i. H. the apex of the angle ⁇ 'between the longitudinal axis x-x of the support and the longitudinal axis of the longitudinal holes 104' is directed towards the lower end of the lower rod 2.
  • the second adjustment head 100 ' cannot be moved on the upper rod 4, but is welded to the lower rod 2. All other components of the second adjustment head 100 'are identical to the components of the first adjustment head 100, so that a further description of these components is unnecessary here.
  • the friction roller 102 'of the second lower adjustment head 100' is self-lockingly wedged between the tread 4 'of the upper rod 4 and opposite wedge surfaces of the longitudinal holes 104'.
  • the helical spring 138 ' presses the friction roller 102' downward towards the clamping point via the guide member 130 '.
  • the friction roller 102 ' is turned clockwise by means of the hand lever 140 'rotated.
  • the friction roller 102 ' By pressing the hand lever 136 'in the direction of the lower rod 2 against the spring 138', the friction roller 102 'is moved upward away from the clamping point, so that the upper rod 4 can be pushed into the lower rod 2 to shorten the strut .
  • the stand can also be used to drill holes down into the floor and can also be used horizontally to drill holes in vertical walls.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)

Abstract

The stand has a length-adjustable support of two telescopic bars (2,4), and a carrier (10) for a drill (30), which is axially moveable on one bar towards the drilling location, via a lockable adjusting device (40). An advance pressure spring (50) is located between carrier and adjuster. An advance pressure spring is located between carrier and adjuster. When a drill clamped in the carrier comes into contact with the drilling point, the spring is compressed and an advance force is applied to the carrier via the adjusting device. The spring is a helical spring arranged around the bar. The adjusting device has a threaded ring, which is adjustable on a threaded section of the bar.

Description

Die Erfindung bezieht sich auf einen Bohrständer mit automatischer Vorschubeinrichtung für eine Bohrmaschine, insbesondere zum Herstellen von Bohrlöchern in Betondecken oder dergleichen.The invention relates to a drill stand with an automatic feed device for a drilling machine, in particular for producing boreholes in concrete ceilings or the like.

Betondecken werden üblicherweise von unten nach oben durchbohrt, damit der Bohrstaub durch Schwerkraft ständig frei aus dem Bohrloch herausfallen kann. Die Bohrarbeit erfordert einen hohen Kraftaufwand, da die Bohrmaschine manuell von unten nach oben gedrückt werden muss. Dabei ist der Arbeiter gleichzeitig dem aus dem Bohrloch herausfallenden Bohrstaub ausgesetzt. Die Arbeit ist nicht ungefährlich infolge des zu Schwingungen neigenden langen Bohrers und Gesundheitsschäden durch Einatmen des Staubes können ebenfalls auftreten.Concrete ceilings are usually drilled from the bottom up so that the drilling dust can fall freely out of the borehole due to gravity. The drilling work requires a lot of effort, since the drilling machine has to be pushed upwards manually. At the same time, the worker is exposed to the drilling dust falling out of the borehole. The work is not harmless as a result of the long drill tending to vibrate and damage to health through inhalation of the dust can also occur.

Es sind schon Bohrständer mit automatischer, hydraulischer Vorschubeinrichtung bekannt, um die Bohrmaschine gegen die Betondecke zu drücken. Solche hydraulische Vorschubeinrichtungen sind konstruktiv aufwendig und dementsprechend teuer in der Anschaffung. Sie eignen sich deshalb nur für verhältnismässig grosse, schwere Bohrmaschinen zur Herstellung von Betondurchbrüchen mit grossem Durchmesser. Hydraulische Vorschubeinrichtungen wurden bisher nicht im Zusammenhang mit Handbohrmaschinen zum Bohren von kleineren Löchern in Betondecken benützt.Drilling stands with automatic, hydraulic feed devices are already known to press the drilling machine against the concrete ceiling. Such hydraulic feed devices are structurally complex and accordingly expensive to buy. They are therefore only suitable for relatively large, heavy drilling machines for the production of large diameter concrete openings. Hydraulic feed devices have not previously been used in connection with hand drills for drilling smaller holes in concrete ceilings.

Es ist ebenfalls schon bekannt, einen Bohrständer mit einem schwenkbaren Hebel zu versehen, um eine Bohrmaschine von unten gegen eine Betondecke anzudrücken. Dies ermöglicht zwar ein einfacheres Arbeiten jedoch ist der Arbeiter noch immer dem aus dem Bohrloch herausfallenden Staub ausgesetzt.It is also already known to provide a drill stand with a pivotable lever in order to press a drill from below against a concrete ceiling. Although this allows easier work, the worker is still exposed to the dust falling out of the borehole.

Aufgabe der Erfindung ist es, einen tragbaren, einfachen und leichten Bohrständer mit automatischer Vorschubeinrichtung für eine Handbohrmaschine zu schaffen, damit Betondurchbrüche unter Vermeidung der oben erwähnten Nachteile ohne manuellen Kraftaufwand und ohne Staubbelästigung hergestellt werden können.The object of the invention is to provide a portable, simple and light drill stand with an automatic feed device for a hand drill, so that concrete breakthroughs can be made without manual effort and without dust pollution while avoiding the disadvantages mentioned above.

Zur Lösung dieser Aufgabe der Erfindung schafft die Erfindung einen Bohrständer mit einer längenveränderbaren Stütze bestehend aus zwei teleskopartig verstellbaren Stangen, mit einer auf einer der beiden Stangen axial verschiebbar geführten Trageinrichtung für eine Bohrmaschine und einer auf der Stange axial beweglichen blockierbaren Verstelleinheit zum Vorschieben der Trageinrichtung in Richtung zur Bohrstelle über eine zwischen der Trageinrichtung und der Verstelleinheit angeordnete Vorschub-Druckfeder, wobei bei Anlage eines in der Bohrmaschine eingespannten Bohrers an der Bohrstelle durch Zusammendrücken der Vorschub-Druckfeder über die Verstelleinheit eine Vorschubkraft auf die Trageinrichtung auszuüben ist.To achieve this object of the invention, the invention provides a drill stand with a length-adjustable support consisting of two telescopically adjustable rods, with a support device for a drill, which is axially displaceably guided on one of the two rods, and an axially movable, lockable adjustment unit for advancing the support device in Direction to the drilling point via a feed pressure spring arranged between the support device and the adjustment unit, wherein when a drill clamped in the drilling machine is applied to the drilling point, a feed force is to be exerted on the support device by compressing the feed pressure spring via the adjustment unit.

Zum Herstellen einer Betondurchbohrung wird der Bohrständer zwischen dem Fussboden und der Betondecke aufgestellt und dabei durch Längenveränderung an die Höhe des Raumes angepasst und schliesslich fest zwischen dem Fussboden und der Decke verspannt. Anschliessend wird durch Betätigung der Verstelleinheit die Trageinrichtung mit der Bohrmaschine über die Vorschub-Druckfeder nach oben verschoben bis der Bohrer die Decke berührt. Die Verstelleinheit wird dann weiter nach oben bewegt, wodurch die Feder zusammengedrückt wird bis diese den Bohrer mit der erforderlichen Vorschubkraft gegen die Decke anpresst. Der Bohrständer ist nun fertig aufgestellt und die Bohrmaschine kann über eine Fernsteuerung eingeschaltet werden. Nachdem die Decke durchbohrt ist, wird die Bohrmaschine über die Fernsteuerung wieder ausgeschaltet und die Verstelleinheit wird zum Entspannen der Vorschubfeder und Entfernen der Bohrmaschine von der Bohrstelle wieder nach unten bewegt. Betondurchbohrungen können also ohne manuellen Kraftaufwand und frei von Staubbelästigung mit einem einfachen Bohrständer durchgeführt werden.To drill a concrete hole, the drill stand is set up between the floor and the concrete ceiling and adjusted to the height of the room by changing the length and finally firmly clamped between the floor and the ceiling. Then, by actuating the adjustment unit, the carrying device with the drill is moved upwards via the feed pressure spring until the drill touches the ceiling. The adjustment unit is then moved further upwards, which compresses the spring until it presses the drill against the ceiling with the required feed force. The drill stand is now set up and the drill can be switched on via a remote control. After the ceiling has been pierced, the drill is switched off again via the remote control and the adjusting unit is moved down again to relax the feed spring and remove the drill from the drilling point. Concrete piercing can therefore be done without manual effort and free of Dust pollution can be carried out with a simple drill stand.

Als Bohrständer können handelsübliche längenveränderbare Stützen benutzt werden, wie sie zum Aufstellen von Verschalungen gebraucht werden. Diese Stützen bestehen üblicherweise aus einem unteren Standrohr oder einer unteren Stange, in der eine obere Stange verschiebbar aufgenommen ist. Ausserdem haben diese bekannten Stützen eine Einrichtung zur Längenveränderung der Stütze. Es ist lediglich erforderlich auf der oberen Stange die Trageinrichtung für die Bohrmaschine, die Verstelleinheit sowie die Vorschub-Druckfeder vorzusehen. Dabei kann die Vorschub-Druckfeder eine Schraubenfeder sein, welche um die Bohrstange herum angeordnet ist.Commercially available, length-adjustable supports can be used as drill stands, such as those used to set up formwork. These supports usually consist of a lower standpipe or a lower rod in which an upper rod is slidably received. In addition, these known supports have a device for changing the length of the support. It is only necessary to provide the support device for the drilling machine, the adjustment unit and the feed compression spring on the upper rod. The feed compression spring can be a helical spring which is arranged around the boring bar.

Zum Anheben der Trageinrichtung mit der Bohrmaschine und zum Zusammendrücken der Vorschub-Druckfeder kann die Verstelleinheit auf der oberen Stange einen Gewindering aufweisen, der auf einem Gewindeabschnitt der oberen Stange sitzt. Der Gewindering kann nach dem Anheben der Trageinrichtung mit der Bohrmaschine und dem Zusammendrücken der Vorschub-Druckfeder auf der oberen Stange verriegelt werden.In order to lift the carrying device with the drilling machine and to compress the feed compression spring, the adjusting unit can have a threaded ring on the upper rod, which is seated on a threaded section of the upper rod. The threaded ring can be locked on the upper rod after lifting the carrying device with the drill and compressing the feed pressure spring.

Vorzugsweise hat die Verstelleinheit aber einen auf der Stange verschiebbaren, ersten Verstellkopf, in dem eine drehbare Friktionsrolle gelagert ist, die unter der Belastung durch die Vorschub-Druckfeder selbsthemmend zwischen einer Lauffläche der Stange und schrägen Flächen des Verstellkopfes verkeilbar und in Richtung auf die Keilstelle federbelastet ist, wobei durch Antrieb der Friktionsrolle von aussen der Verstellkopf auf die Stange zu verschieben ist zum Vorschieben der Trageinrichtung zur Bohrstelle und zum Zusammendrücken der Vorschub-Druckfeder und die Friktionsrolle entgegen der Federbelastung von der Keilstelle weg beweglich ist, um die Vorschub-Druckfeder durch Verlagerung in entgegengesetzter Richtung des Verstellkopfes auf der Stange zu entspannen und die Trageinrichtung von der Bohrstelle weg zu bewegen. Dabei kann die Friktionsrolle in schräg zur Längsachse der Stütze angeordneten Längslöchern gelagert sein und beidseitig des Verstellkopfes von einem Führungsorgan erfasst sein, das mit einem Handgriff versehen ist, wobei die schrägen Flächen durch Seitenflächen der Längslöcher gebildet sind, die in Vorschubrichtung zur Lauffläche der Stange hin konvergieren und eine Feder zwischen dem Führungsglied und dem Verstellkopf angeordnet ist, welche die Friktionsrolle zur Keilstelle hin drückt.However, the adjustment unit preferably has a first adjustment head which can be displaced on the rod and in which a rotatable friction roller is mounted, which can be wedged self-locking between a running surface of the rod and inclined surfaces of the adjustment head under the load of the feed compression spring and is spring-loaded in the direction of the wedge point is, by driving the friction roller from the outside to move the adjustment head on the rod to advance the support device to the drilling point and to compress the feed compression spring and the friction roller against the spring load is movable away from the wedge point to the feed compression spring by displacement to relax on the rod in the opposite direction of the adjustment head and to move the carrying device away from the drilling point. Here The friction roller can be mounted in longitudinal holes arranged obliquely to the longitudinal axis of the support and can be gripped on both sides of the adjustment head by a guide element which is provided with a handle, the inclined surfaces being formed by side surfaces of the longitudinal holes which converge in the feed direction towards the running surface of the rod and a spring is arranged between the guide member and the adjustment head, which presses the friction roller towards the wedge point.

Die Einrichtung zur Längenveränderung der Stütze kann aus einem Friktionsantrieb bestehen, mit einem zweiten Verstellkopf, der an der unteren Stange angeformt ist. Ein Verstellkopf mit Friktionsantrieb für eine längenveränderbare Stütze ist zum Beispiel in der DE-PS 26 30 446 beschrieben. In dem zweiten Verstellkopf ist eine drehbare Friktionsrolle gelagert, die unter der Wirkung der Last durch die obere Stange selbsthemmend zwischen einer Lauffläche der oberen Stange und schrägen Flächen des Verstellkopfes verkeilbar und in Richtung auf die Keilstelle federbelastet ist. Die Stütze wird dabei durch Antrieb der Friktionsrolle verlängert durch Ausfahren der oberen Stange aus der unteren Stange und zum Verkürzen der Länge der Stütze wird die Friktionsrolle von der Keilstelle weg entgegen der Federbelastung bewegt, wonach die obere Stange einfach wieder in die untere Stange hineinverschoben werden kann.The device for changing the length of the support can consist of a friction drive with a second adjustment head which is integrally formed on the lower rod. An adjustment head with a friction drive for a length-adjustable support is described for example in DE-PS 26 30 446. In the second adjustment head, a rotatable friction roller is mounted which, under the action of the load through the upper rod, can be locked in a self-locking manner between a running surface of the upper rod and inclined surfaces of the adjustment head and is spring-loaded in the direction of the wedge point. The support is extended by driving the friction roller by extending the upper rod from the lower rod and to shorten the length of the support, the friction roller is moved away from the wedge point against the spring load, after which the upper rod can simply be pushed back into the lower rod .

Anstelle dieses zweiten Verstellkopfes mit Friktionsantrieb ist es aber auch möglich, eine Schraubverbindung zwischen den beiden Stangen vorzusehen und die Stangen durch Rotation in bezug aufeinander auf die erforderliche Länge einzustellen und anschliessend durch einen Stift oder dergleichen zu verriegeln. Schliesslich wäre es auch denkbar, eine Stange mit zwei gegenüberliegenden diametralen Bohrungen vorzusehen und in der anderen Stange eine Reihe von axial beabstandeten Bohrlöchern anzubringen und zum Einstellen der Stütze auf die erforderliche Länge einen Stift durch miteinander ausgerichtete Bohrungen der beiden Stangen hindurchzustecken. In diesem Falle muss die Stütze durch Unterlegkeile oder dergleichen zwischen dem Boden und der Decke verspannt werden.Instead of this second adjustment head with friction drive, it is also possible to provide a screw connection between the two rods and to adjust the rods to the required length by rotation with respect to one another and then to lock them with a pin or the like. Finally, it would also be conceivable to provide a rod with two diametrically opposite bores and to install a row of axially spaced boreholes in the other rod and to set the support to the required length by a pin through one another through the aligned holes of the two rods. In this case, the support must be clamped between the floor and the ceiling using wheel chocks or the like.

Der erste Verstellkopf für die Trageinrichtung der Bohrmaschine und der zweite Verstellkopf zur Längenveränderung der Stütze sind im wesentlichen baugleich, mit der Ausnahme, dass der erste Verstellkopf auf der einen Stange (die innere, obere Stange) verschiebbar ist und der zweite Verstellkopf an der anderen Stange (die äussere, untere Stange) angeformt, z. B. angeschweisst ist. Ausserdem konvergieren die schrägen Keilflächen des ersten Verstellkopfes zur Lauffläche der inneren Stange in Richtung nach oben zur Vorschub-Druckfeder, während die schrägen Keilflächen des zweiten Verstellkopfes in entgegengesetzter Richtung zur Lauffläche der inneren Stange hin konvergieren. Die beiden Verstellköpfe sind also in bezug aufeinander um 180° gedreht angeordnet.The first adjustment head for the support device of the drilling machine and the second adjustment head for changing the length of the support are essentially identical in construction, with the exception that the first adjustment head can be moved on one rod (the inner, upper rod) and the second adjustment head on the other rod (the outer, lower rod) molded, z. B. is welded. In addition, the oblique wedge surfaces of the first adjustment head converge towards the tread of the inner rod in the upward direction toward the feed compression spring, while the oblique wedge surfaces of the second adjustment head converge in the opposite direction towards the tread of the inner rod. The two adjustment heads are thus rotated by 180 ° with respect to one another.

Ein Ausführungsbeispiel der Erfindung ist in den Zeichnungen dargestellt und wird im folgenden ausführlicher beschrieben, es zeigen:

  • Figur 1 eine Darstellung des Bohrständers gemäss der Erfindung mit einer in der Trageinrichtung eingespannten Bohrmaschine.
  • Figur 2 eine vergrösserte Darstellung der Verstellköpfe zur Längenveränderung der Stütze und zum Anheben der Trageinrichtung und Vorspannen der Vorschub-Druckfeder.
  • Figur 3 eine Schnittdarstellung längs der Linie 3-3 nach Figur 2.
An embodiment of the invention is shown in the drawings and is described in more detail below, showing:
  • Figure 1 is an illustration of the drill stand according to the invention with a drill clamped in the support device.
  • Figure 2 is an enlarged view of the adjustment heads for changing the length of the support and for lifting the support device and biasing the feed compression spring.
  • Figure 3 is a sectional view taken along line 3-3 of Figure 2.

Der Bohrständer hat, wie in Figur 1 dargestellt, eine untere äussere Hohlstange 2 und eine obere innere Hohlstange 4, die teleskopisch in der unteren inneren Stange 2 aufgenommen ist. Zur Längenveränderung der Stütze werden die Stangen 2 und 4 in Längsrichtung relativ zueinander verschoben. Die untere Stange 2 hat an ihrem unteren Ende einen verbreiterten Fussteil 2a und die obere Stange hat an ihrem oberen Ende einen verbreiterten Kopfteil 4a.As shown in FIG. 1, the drill stand has a lower outer hollow rod 2 and an upper inner hollow rod 4, which is received telescopically in the lower inner rod 2. To change the length of the support, the rods 2 and 4 are displaced in the longitudinal direction relative to one another. The lower rod 2 has on her lower end a widened foot part 2a and the upper rod has a widened head part 4a at its upper end.

Auf der oberen Stange 4 ist eine Trageinrichtung 10 mit einem Einspannfutter 20 für eine Bohrmaschine 30 verschiebbar angeordnet. Die Trageinrichtung 10 hat eine Hülse 12, die in ihrer Querschnittsform der Querschnittsform der Stange 4 angepasst ist. Vorzugsweise haben beide Stangen 2, 4 eine quadratische Form, andere Formen, wie z. B. kreisförmige Stangen sind ebenfalls denkbar. Zur genauen Einstellung der Bohrmaschine 30 kann das Einspannfutter 20 in Radial- und Umfangsrichtung in bezug auf die Stütze einstellbar sein. Unterhalb der Trageinrichtung 10 ist eine Verstelleinheit 40 auf der oberen Stange 4 vorgesehen, welche auf der Stange 4 blockierbar ist. Zwischen der Verstelleinheit 40 und der Trageinrichtung 10 ist eine Vorschub-Druckfeder 50 auf der oberen Stange 4 angeordnet. Ein erster Federsitzring 52 befindet sich zwischen dem oberen Ende der Feder 50 und der Trageinrichtung 10 und ein zweiter Federsitzring 54 befindet sich zwischen dem unteren Ende der Feder 50 und der Verstelleinheit 40. Durch Verschieben der Verstelleinheit 40 nach oben auf der Stange 4 wird die Feder 50 mitsamt der Trageinrichtung 10 und der Bohrmaschine 30 angehoben, bis ein in der Bohrmaschine eingespannter Bohrer 22 die Decke D an der zu durchbohrenden Stelle berührt und dann wird durch weiteres nach oben Drücken des unteren Endes der Feder 50 über die Verstelleinheit 40 die Feder 50 zusammengedrückt, um den Bohrer mit der erforderlichen Vorschubkraft gegen die Decke D zu pressen.A support device 10 with a chuck 20 for a drilling machine 30 is slidably arranged on the upper rod 4. The carrying device 10 has a sleeve 12 which is adapted in its cross-sectional shape to the cross-sectional shape of the rod 4. Preferably, both rods 2, 4 have a square shape, other shapes, such as. B. circular rods are also conceivable. For precise adjustment of the drilling machine 30, the chuck 20 can be adjustable in the radial and circumferential directions with respect to the support. An adjustment unit 40 is provided below the support device 10 on the upper rod 4 and can be blocked on the rod 4. A feed compression spring 50 is arranged on the upper rod 4 between the adjustment unit 40 and the carrying device 10. A first spring seat ring 52 is located between the upper end of the spring 50 and the support device 10 and a second spring seat ring 54 is located between the lower end of the spring 50 and the adjustment unit 40. By moving the adjustment unit 40 upwards on the rod 4, the spring becomes 50 together with the carrying device 10 and the drilling machine 30 are raised until a drill 22 clamped in the drilling machine touches the ceiling D at the point to be drilled and then the spring 50 is compressed by further pressing the lower end of the spring 50 via the adjustment unit 40 to press the drill against the ceiling D with the required feed force.

Die Verstelleinheit 40 wird nun mit Bezug auf die Figuren 2 und 3 ausführlicher beschrieben. Die Verstelleinneit 40 hat einen ersten Verstellkopf 100 mit Friktionsantrieb. Der Friktionsantrieb hat eine Friktionsrolle 102, die in Längslöchern 104 in der vorderen Wand 106 und in der hinteren Wand 108 des Verstellkopfes 100 gelagert ist. Die Längslöcher 104 sind in einem spitzen Winkel α zur Längsachse x-x der Stütze angeordnet, wobei die Winkelspitze in Richtung zu dem Kopfteil 4a der oberen inneren Stange 4 gerichtet ist. Die Friktionsrolle 102 hat einen mittleren Teil 102a, der an der Lauffläche 4' der inneren oberen Stange 4 anliegt. Beidseitig des mittleren Teiles 102a hat die Friktionsrolle 102 Endteile 102b mit grösserem Durchmesser, die gegenüberliegende Seitenflächen der oberen inneren Stange 4 überlappen und in den Längslöchern 104 verschiebbar aufgenommen und geführt sind. Durch die Vorschub-Druckfeder 50 wird der Verstellkopf 100 nach unten gedrückt und über die schrägen Keilflächen 104' der Längslöcher 104, welche nach oben zur Lauffläche 4' der oberen Stange 4 hin konvergieren, wird die Friktionsrolle 102 zwischen der Lauffläche 4' der oberen inneren Stange 4 sowie den der Lauffläche 4' zugewandten und gegenüberliegenden Keilflächen 104' der Längslöcher 104 verkeilt oder blockiert.The adjustment unit 40 will now be described in more detail with reference to FIGS. 2 and 3. The adjustment unit 40 has a first adjustment head 100 with a friction drive. The friction drive has a friction roller 102, which in longitudinal holes 104 in the front wall 106 and in the rear wall 108 of the adjustment head 100 is stored. The longitudinal holes 104 are arranged at an acute angle α to the longitudinal axis xx of the support, the angular tip being directed towards the head part 4a of the upper inner rod 4. The friction roller 102 has a central part 102a which bears against the tread 4 'of the inner upper rod 4. The friction roller 102 has end parts 102b of larger diameter on both sides of the central part 102a, which overlap opposite side surfaces of the upper inner rod 4 and are slidably received and guided in the longitudinal holes 104. By the feed compression spring 50, the adjustment head 100 is pressed down and over the oblique wedge surfaces 104 'of the longitudinal holes 104, which converge upwards towards the tread 4' of the upper rod 4, the friction roller 102 between the tread 4 'of the upper inner Rod 4 and the wedge surfaces 104 'of the longitudinal holes 104 facing and opposing the tread 4' are wedged or blocked.

Ein Führungsorgan 130 ist am Verstellkopf 100 mittels einem Schwenkstift 132 an Ansätzen 134 um eine horizontale Achse y-y schwenkbar gelagert. Das Führungsorgan 130 ist U-förmig ausgebildet mit zwei Schenkeln 130a, 130b, die die vordere Wand 106 bzw. die Rückwand 108 des Verstellkopfes 100 übergreifen und an ihrem freien Ende mit halbkreisförmigen Ausschnitten 134a versehen sind, in welchen die Endteile 102b der Friktionsrolle 102 aufgenommen sind. In den Figuren 1 und 2 ist der vordere Schenkel 130a auf- oder weggebrochen dargestellt. Am Steg 130c des U-förmigen Führungsorgans 130 ist ein Handgriff 136 vorgesehen. Eine Schraubenfeder 138 sitzt auf dem Schwenkstift 132 und drückt das Führungsorgan 130 im Uhrzeigersinn und dementsprechend die Friktionsrolle 102 in den Längslöchern 104 zur Keilstelle hin nach oben zwischen die Lauffläche 4' und die Keilflächen 104'.A guide member 130 is mounted on the adjustment head 100 by means of a pivot pin 132 on lugs 134 about a horizontal axis y-y. The guide member 130 is U-shaped with two legs 130a, 130b, which overlap the front wall 106 and the rear wall 108 of the adjusting head 100 and are provided at their free end with semicircular cutouts 134a, in which the end parts 102b of the friction roller 102 are received are. In Figures 1 and 2, the front leg 130a is shown broken or broken away. A handle 136 is provided on the web 130c of the U-shaped guide member 130. A coil spring 138 sits on the pivot pin 132 and presses the guide member 130 clockwise and accordingly the friction roller 102 in the longitudinal holes 104 upwards towards the wedge point between the tread 4 'and the wedge surfaces 104'.

Eine Handkurbel 140 ist schwenkbar in einer Querbohrung der Friktionsrolle 102 aufgenommen. Durch Rotation der Handkurbel 140 im Uhrzeigersinn wird über die Friktionsrolle 102 der Verstellkopf 100 auf der inneren Stange 4 nach oben bewegt zum Anheben der Bohrmaschine 30 und Zusammendrücken der Vorschubfeder 50. Durch Drücken des Handgriffes 136 in Richtung zu der oberen Stange 4 wird die Friktionsrolle 102 in den Längslöchern 104 nach unten von der Keilstelle weg bewegt und der Verstellkopf 100 kann auf der oberen Stange frei nach unten bewegt werden zum Entspannen der Vorschubfeder 50 und Absenken der Bohrmaschine 30. Der Verstellkopf 100 hat eine Verlängerungshülse 142, die in ihrer Querschnittsform der oberen Stange 4 angepasst und unverdrehbar auf dieser geführt ist. Der untere Federsitzring 54 liegt auf dem oberen Ende der Verlängerungshülse 142.A hand crank 140 is pivotally received in a transverse bore of the friction roller 102. By rotating the hand crank 140 clockwise over the Friction roller 102, the adjustment head 100 on the inner rod 4 moves upwards to raise the drilling machine 30 and compress the feed spring 50. By pressing the handle 136 in the direction of the upper rod 4, the friction roller 102 in the longitudinal holes 104 is moved downward away from the wedge point moved and the adjusting head 100 can be freely moved down on the upper rod to relax the feed spring 50 and lower the drilling machine 30. The adjusting head 100 has an extension sleeve 142 which is adapted in its cross-sectional shape to the upper rod 4 and is non-rotatably guided thereon. The lower spring seat ring 54 lies on the upper end of the extension sleeve 142.

Zur Längenveränderung der Stütze ist ein zweiter Verstellkopf 100', siehe Figuren 1 und 2, mit Friktionsantrieb vorgesehen, der im wesentlichen dem ersten Verstellkopf 100 zum Anheben der Trageinrichtung 10 und Zusammendrücken der Feder 50 entspricht, mit der Ausnahme, dass der zweite Verstellkopf 100' um 180 Grad gedreht in bezug auf den ersten Verstellkopf 100 angeordnet ist, d. h. die Spitze des Winkels α' zwischen der Längsachse x-x der Stütze und der Längsachse der Längslöcher 104' ist zum unteren Ende der unteren Stange 2 hin gerichtet. Ausserdem ist der zweite Verstellkopf 100' nicht auf der oberen Stange 4 verschiebbar, sondern er ist an der unteren Stange 2 festgeschweisst. Alle anderen Bauteile des zweiten Verstellkopfes 100' sind den Bauteilen des ersten Verstellkopfes 100 identisch, so dass eine weitere Beschreibung dieser Bauteile sich hier erübrigt.To change the length of the support, a second adjustment head 100 ', see FIGS. 1 and 2, is provided with a friction drive, which essentially corresponds to the first adjustment head 100 for lifting the carrying device 10 and compressing the spring 50, with the exception that the second adjustment head 100' is rotated by 180 degrees with respect to the first adjustment head 100, i. H. the apex of the angle α 'between the longitudinal axis x-x of the support and the longitudinal axis of the longitudinal holes 104' is directed towards the lower end of the lower rod 2. In addition, the second adjustment head 100 'cannot be moved on the upper rod 4, but is welded to the lower rod 2. All other components of the second adjustment head 100 'are identical to the components of the first adjustment head 100, so that a further description of these components is unnecessary here.

Es sei bloss erwähnt, dass unter der Last die Friktionsrolle 102' des zweiten unteren Verstellkopfes 100' selbsthemmend zwischen der Lauffläche 4' der oberen Stange 4 und gegenüberliegenden Keilflächen der Längslöcher 104' verkeilt wird. Die Schraubenfeder 138' drückt über das Führungsorgan 130' die Friktionsrolle 102' nach unten zur Klemmstelle hin. Zum Verlängern der Stütze wird die Friktionsrolle 102' im Uhrzeigersinn mittels des Handhebels 140' gedreht. Durch Drücken des Handhebels 136' in Richtung zu der unteren Stange 2 gegen die Feder 138' wird die Friktionsrolle 102' von der Klemmstelle nach oben weg bewegt, so dass die obere Stange 4 zum Verkürzen der Strebe in die untere Stange 2 hinein geschoben werden kann.It should only be mentioned that under the load the friction roller 102 'of the second lower adjustment head 100' is self-lockingly wedged between the tread 4 'of the upper rod 4 and opposite wedge surfaces of the longitudinal holes 104'. The helical spring 138 'presses the friction roller 102' downward towards the clamping point via the guide member 130 '. To extend the support, the friction roller 102 'is turned clockwise by means of the hand lever 140 'rotated. By pressing the hand lever 136 'in the direction of the lower rod 2 against the spring 138', the friction roller 102 'is moved upward away from the clamping point, so that the upper rod 4 can be pushed into the lower rod 2 to shorten the strut .

Der Ständer kann auch benutzt werden zum Bohren von Löchern nach unten in den Fussboden und kann auch horizontal angebracht werden zum Bohren von Löchern in senkrechten Wänden.The stand can also be used to drill holes down into the floor and can also be used horizontally to drill holes in vertical walls.

Claims (8)

Bohrständer mit einer längenveränderbaren Stütze bestehend aus zwei teleskopartig verstellbaren Stangen, mit einer auf einer der beiden Stangen axial verschiebbar geführten Trageinrichtung für eine Bohrmaschine und einer auf der Stange axial beweglichen und blockierbaren Verstelleinheit zum Vorschieben der Trageinrichtung in Richtung zur Bohrstelle über eine zwischen der Trageinrichtung und der Verstelleinneit angeordnete Vorschub-Druckfeder, wobei bei Anlage eines in der Bohrmaschine eingespannten Bohrers an der Bohrstelle durch Zusammendrücken der Vorschub-Druckfeder über die Verstelleinheit eine Vorschubkraft auf die Trageinrichtung auszuüben ist.Drill stand with a length-adjustable support consisting of two telescopically adjustable rods, with a support device for a drill, which is axially displaceably guided on one of the two rods, and an adjustment unit which can be axially moved and locked on the rod for advancing the support device in the direction of the drilling point via a between the support device and the feed compression spring arranged in the adjustment, a feed force being exerted on the support device when a drill clamped in the drilling machine is in contact with the drilling point by compressing the feed compression spring via the adjustment unit. Bohrständer nach Anspruch 1, wobei die Vorschub-Druckfeder eine um die Stange angeordnete Schraubenfeder ist.The drill stand according to claim 1, wherein the feed compression spring is a coil spring arranged around the rod. Bohrständer nach Anspruch 1 oder 2, wobei die Verstelleinheit einen Gewindering umfasst, der auf einem Gewindeabschnitt der Stange verstellbar ist.Drill stand according to claim 1 or 2, wherein the adjusting unit comprises a threaded ring which is adjustable on a threaded portion of the rod. Bohrständer nach Anspruch 1 oder 2, wobei die Verstelleinheit einen auf der Stange verschiebbaren Verstellkopf aufweist, in dem eine drebbare Friktionsrolle gelagert ist, die unter der Belastung durch die Vorschub-Druckfeder selbsthemmend zwischen einer Lauffläche der Stange und schrägen Flächen des Verstellkopfes verkeilbar und in Richtung auf die Keilstelle federbelastet ist, wobei durch Antrieb der Friktionsrolle von aussen der Verstellkopf auf die Stange zu verschieben ist zum Vorschieben der Trageinrichtung zur Bohrstelle und zum Zusammendrücken der Vorschub-Druckfeder und die Friktionsrolle entgegen der Federbelastung von der Keilstelle weg beweglich ist, um die Vorschub-Druckfeder durch Verlagerung in entgegengesetzter Richtung des Verstellkopfes auf der Stange zu entspannen und die Trageinrichtung von der Bohrstelle weg zu bewegen.Drill stand according to claim 1 or 2, wherein the adjusting unit has an adjusting head which is displaceable on the rod, in which a rotatable friction roller is mounted, which can be wedged under the load by the feed compression spring between a running surface of the rod and inclined surfaces of the adjusting head and in the direction is spring-loaded on the wedge point, the adjustment head being moved from the outside to the rod by driving the friction roller for advancing the carrying device to the drilling point and for compressing the feed compression spring and the friction roller being movable away from the wedge point counter to the spring load in order to advance the feed - compression spring by displacement in the opposite direction of the Relax the adjustment head on the rod and move the support device away from the drilling point. Bohrständer nach Anspruch 4, wobei die Friktionsrolle in schräg zur Längsachse der Stütze angeordneten Längslöchern gelagert ist und beidseitig des Verstellkopfes von einem Führungsorgan erfasst ist, das mit einem Handgriff versehen ist, wobei die schrägen Flächen durch Seitenflächen der Längslöcher gebildet sind, die in Vorschubrichtung zur Lauffläche der Stange hin konvergieren und eine Feder zwischen dem Führungsglied und dem Verstellkopf angeordnet ist, die die Friktionsrolle zur Keilstelle hin drückt.A drill stand according to claim 4, wherein the friction roller is mounted in longitudinal holes arranged obliquely to the longitudinal axis of the support and is gripped on both sides of the adjustment head by a guide element which is provided with a handle, the inclined surfaces being formed by side surfaces of the longitudinal holes which extend in the feed direction Converge tread of the rod and a spring is arranged between the guide member and the adjustment head, which presses the friction roller towards the wedge point. Bohrständer nach einem der Ansprüche 1 bis 5, mit einer einstellbaren Verschraubung zwischen den Stangen zur Längenveränderung der Stütze.Drill stand according to one of claims 1 to 5, with an adjustable screw connection between the rods for changing the length of the support. Bohrständer nach einem der Ansprüche 1 bis 5, wobei eine der Stangen miteinander ausgerichtete Querbohrungen und die andere Stange eine Reihe von axialbeabstandeten Bohrungen aufweist und zur Einstellung der Länge der Stütze ein Stift vorgesehen ist, der durch die Querbohrungen der einen Stange und eine damit fluchtend eingestellte Bohrung der anderen Stange einzustecken ist.Drill stand according to one of claims 1 to 5, wherein one of the rods aligned cross bores and the other rod has a series of axially spaced bores and a pin is provided for adjusting the length of the support, which is aligned by the cross bores of the one rod and one Hole in the other rod. Bohrständer nach einem der Ansprüche 1 bis 5, wobei zur Längenveränderung die Stütze eine der Stangen mit einem Verstellkopf versehen ist, in dem eine drehbare Friktionsrolle gelagert ist, die unter der Wirkung der Last durch die andere Stange selbsthemmend zwischen einer Lauffläche der anderen Stange und schrägen Flächen des Verstellkopfes verkeilbar und in Richtung auf die Keilstelle federbelastet ist, wobei die Stütze durch Antrieb der Friktionsrolle von aussen zu verlängern ist und zum Verkürzen der Länge der Stütze die Friktionsrolle von der Keilstelle weg entgegen der Federbelastung beweglich ist.Drill stand according to one of claims 1 to 5, wherein for changing the length of the support one of the rods is provided with an adjustment head in which a rotatable friction roller is mounted, which is self-locking under the action of the load by the other rod between a tread of the other rod and inclined Surfaces of the adjustment head can be wedged and is spring-loaded in the direction of the wedge point, the support being extendable from the outside by driving the friction roller and the friction roller being movable away from the wedge point against the spring load to shorten the length of the support.
EP95630053A 1995-05-24 1995-05-24 Drilling support with feeding arrangement for hand-held drilling machine Withdrawn EP0747180A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
EP95630053A EP0747180A1 (en) 1995-05-24 1995-05-24 Drilling support with feeding arrangement for hand-held drilling machine
US08/650,617 US5676503A (en) 1995-05-24 1996-05-20 Drill stand with an automatic advancement device for a drilling machine
JP8150236A JPH08332628A (en) 1995-05-24 1996-05-22 Punching stand equipped with automatic forward space device for punching machine
AU52436/96A AU5243696A (en) 1995-05-24 1996-05-23 Drill stand with an automatic feeder for a drilling machine
CA002177202A CA2177202A1 (en) 1995-05-24 1996-05-23 Drill stand with an automatic feeder for a drilling machine

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EP95630053A EP0747180A1 (en) 1995-05-24 1995-05-24 Drilling support with feeding arrangement for hand-held drilling machine
US08/650,617 US5676503A (en) 1995-05-24 1996-05-20 Drill stand with an automatic advancement device for a drilling machine

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EP0747180A1 true EP0747180A1 (en) 1996-12-11

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EP (1) EP0747180A1 (en)
JP (1) JPH08332628A (en)
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Also Published As

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US5676503A (en) 1997-10-14
AU5243696A (en) 1996-12-05
JPH08332628A (en) 1996-12-17
CA2177202A1 (en) 1996-11-25

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