EP0100421A2 - Bohrständer - Google Patents

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Publication number
EP0100421A2
EP0100421A2 EP83106007A EP83106007A EP0100421A2 EP 0100421 A2 EP0100421 A2 EP 0100421A2 EP 83106007 A EP83106007 A EP 83106007A EP 83106007 A EP83106007 A EP 83106007A EP 0100421 A2 EP0100421 A2 EP 0100421A2
Authority
EP
European Patent Office
Prior art keywords
drill
base
rods
drill stand
stand 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.)
Withdrawn
Application number
EP83106007A
Other languages
English (en)
French (fr)
Other versions
EP0100421A3 (de
Inventor
Peter W. Charnley
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.)
GENERAL HARDWARE Mfg CO Inc
Original Assignee
GENERAL HARDWARE Mfg CO Inc
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 GENERAL HARDWARE Mfg CO Inc filed Critical GENERAL HARDWARE Mfg CO Inc
Publication of EP0100421A2 publication Critical patent/EP0100421A2/de
Publication of EP0100421A3 publication Critical patent/EP0100421A3/de
Withdrawn legal-status Critical Current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
    • B25H1/0042—Stands
    • 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
    • B25H1/0057—Devices for securing hand tools to the work
    • B25H1/0064—Stands attached to the workpiece

Definitions

  • This invention relates to machine tools and is concerned with an improved drill stand.
  • Drill stands are known in the art which serve to support both a drill and a workpiece in their desired relative operating positions. Consequently, the drill stand serves not only as a support for the drill but as a centering guide.
  • Such drill stands generally comprise a base with a pair of upstanding rods extending upwardly from the base in spaced relation.
  • a brace interconnects the rods and is longitudinally slidable thereon.
  • the brace serves as a support for a hand drill and provides means whereby a drill bit can be accommodated in a chuck drivable by the hand drill.
  • a workpiece to be drilled is supported by the base at a location below and aligned with a drill bit accommodated in the chuck. In this manner a drilling operation may be performed by advancing the brace, together with the supported drill assembly, along the rods in the direction towards the workpiece.
  • the brace is removed by movement along the supports in the opposite direction.
  • U.S. Patent 1,895,990 to Harcharick discloses a rudimentary support for a hand drill in which the brace is spring loaded to bias the supported hand drill away from the drilling position.
  • U.S. Patent 2,454,372 to Billeter shows a more elaborate arrangement of a drill and drill jig bushing carrier attachment intended primarily for use in multiple spindle drill presses.
  • U.S. Patent 2,997,900 to Pugsley again shows a portable drill stand in which a drill supporting brace extending between rods is spring loaded to bias the supported drill away from the workpiece. In the Pugsley disclosure the workpiece is clamped between two collars, one of which provides an abutment for the biasing springs.
  • the support rods extend upwardly from the base at right angles thereto. No provision is made for orienting the support rods in parallel relation with respect to the base and, consequently, such drill stands only permit drilling normal to the workpiece.
  • U.S. Patent 3,874,810 to Russell permits drilling the workpiece in directions other than normal thereto. Russell achieves this by extending the support rods through the base by adjustable amounts. By making the support rods project, by adjustable amounts, through the base, the drill stand may also be positioned on uneven workpieces or mounts.
  • the present invention provides an improvement over and above the teaching of the prior art drill stands by permitting drilling to be accomplished at readily adjustable angles with respect to the workpiece.
  • a drill stand comprising a base, a drill support upstanding from said base and supports for locating a workpiece on said base, characterized in that the drill support includes a pair of spaced rods pivotally mounted on said base and interconnected by a bridge member adapted to receive a hand drill and to retain said rods in substantially parallel relationship for pivotal movement in unison with respect to said base.
  • a drill stand comprising a base, a drill support upstanding from said base and supports for locating a workpiece on said base, characterized by a pair of lugs integral with said base and upstanding therefrom in spaced relationship, a pair of spaced support rods pivotally mounted one on each of said lugs cooperating rib and groove clutch components provided on at least one of said rods and the associated mounting lug and clamps adapted to cooperate with said clutch components securely to clamp said rod in a desired angular position with respect to said base, a bridge having a sleeve at each end, said sleeves being slidable on said rods with a relatively close fit whereby said bridge extends between the rods, is slidable longitudinally thereon and retains said rods in substantially parallel alignment for movement about a common pivotal axis, and a spindle mounted on said bridge intermediate the ends thereof and lying substantially parallel to the support rods, said spindle having a drill bit receiving chuck at the end thereof
  • a base 10 is provided with spaced upstanding flanges 11, 12 for supporting a workpiece (not shown). As shown in the drawings, each flange 11, 12 has an upwardly directed surface which defines a V-shaped notch. In the operative drilling position the workpiece spans the flanges 11, 12 and is seated in the V-shaped notches.
  • the base 10 is preferably generally in the form of an annulus defining a central well 13. As most clearly shown in Figure 4 of the drawings, the flanges 11, 12 upstand on opposite sides of the well 13.
  • two lugs 14, 15 also extend upwardly from the base 10. These lugs are located on opposite sides of the well 13 and are in alignment with each other. The axis extending between the lugs 14, 15 extends substantially at right angles to the axis of alignment of the flanges 11, 12.
  • leveling screws 16, 17 may extend through the base. These leveling screws are seated in threaded bores extending through the base and in this manner any irregularity in the surface on which the base is stood may be compensated for by appropriate adjustment of the leveling screws.
  • Twin guide posts or rods 18, 19 are pivotally mounted on the lugs 14, 15 and may be adjusted to extend above the base an any predetermined angle.
  • the lugs 14, 15 have aligned apertures 20, 21 extending therethrough respectively to accommodate bolts 22, 23. These bolts extend also through mating apertures 24, 25 in flanges 26, 27 integral with rod supporting collars 28, 29.
  • the collar 28 is mounted on the lower end of the rod 18 and is secured thereto by any suitable means such as, for example, a grub screw 30.
  • the collar 29 is securely attached to the lower end of the rod 19.
  • the rods 18, 19 are free to pivot through an arc about the axis defined by the aligned bolts.
  • the rods are mounted in parallel and pivot in unison.
  • a brace or bridge 32 which extends between the rods 18, 19 and is longitudinally slidable thereon.
  • the brace or bridge 32 has upper and lower flanges 33, 34 which impart rigidity to the bridge.
  • the bridge also comprises three sleeves 35, 36, 37, one
  • the sleeve 35 is slidably mounted on the rod 18 whilst the sleeve 36 is slidably mounted on the rod 19.
  • the position of the bridge 33 at desired locations along the length of the rods 18, 19 may be controlled by adjustable stops.
  • a collar 38 is shown slidably mounted on the rod 18 and a tightening or set screw 39 extends through the collar.
  • a tightening or set screw may extend through one of the sleeves 35, 36.
  • Figure 4 shows a tightening screw 40 extending through the sleeve 36.
  • Such a tightening screw 40 serves to locate the position of the bridge 33 along the length of the rods 18, 19 but does not define a limiting abutment for restricting movement of the bridge.
  • the third sleeve 37 is located in the center of the bridge 32 and has a spindle 41 extending therethrough.
  • the spindle end which is directed downwardly towards the base 10 receives a chuck 42.
  • the chuck is a conventional drill chuck and has jaws which may be expanded and contracted respectively to release and to grasp a drill bit. As the chuck is of well known and conventional construction, its component parts and operation will not be described in detail.
  • the opposite end of the spindle 41 is drivable by an electric hand drill, not shown.
  • the spindle 41 may be directly attached to the drill motor or, alternatively, may be grasped by a further chuck which is part of the electric drill. In any event, the electric drill rotates the spindle 41 and the chuck 42.
  • leveling screws 16, 17 serve more than one purpose.
  • the screws may be advanced through the base 10 to present sharp points depending from the underside of the base. These points will then serve to anchor or restrain movement of the drill stand either by impinging a relatively soft bench or table or by resisting movement on a relatively hard surface by increasing the friction between the underside of the base and such surface.
  • the drill stand Whilst the foregoing description describes the drill stand as supporting a workpiece to be drilled on the flanges 11, 12, the stand may also seat over the workpiece. In this case the well 13 permits the drill bit to pass through the base to engage the workpiece. When drilling in this manner the screws 16, 17 may be used to straddle and center a workpiece lying under the base 10.
  • a drilling operation in which a workpiece is seated on the V-shaped flanges 11 and 12 and extends across the well 13 will now be described.
  • a drill bit, not shown, having the desired diameter is clamped in the chuck 42 and the drill is secured to the opposite end of the spindle 41.
  • the screw 39 is loosened and the collar 38 is downwardly displaced to form an abutment at which the clamped drill bit extends to its predetermined maximum depth.
  • the screw 40 is loosened to permit movement of the bridge along the rods 18 and 19 and the drill is activated. It is then merely a matter of advancing the drill, by sliding the bridge 32 downwardly towards the base 10, to cause the rotating drill bit to drill the seated workpiece.
  • the drill, bridge 32, chuck 42 and drill bit are retracted at which point the screw 40 may again be tightened to hold the drilling apparatus in the raised inoperative position.
  • Drilling in a direction normal to the workpiece is accomplished when the guide posts or rods 18, 19 extend perpendicularly upwardly from the base 10 as shown in Figures 1, 2 and 4 of the drawings.
  • Figure 3 of the drawings shows the posts firmly clamped at an angle with respect to the base whereby the drill bit will drill at an angle.
  • each of the bolt and nut assemblies 22, 30 and 23, 31 is associated with such a clamp.
  • the clamp is best shown in the exploded perspective view shown in Figure 5 of the drawings. That figure shows how the outwardly directed face of the lug 15 is provided with two annular grooves 43, 44 disposed concentrically around the aperture 21. The figure also shows how the inwardly directed face of the juxtaposed flange 27 has two annular ribs 45, 46 disposed concentrically around the aperture 25. r:- the assembled position the ribs 45, 46 seat in the grooves 43, 44 respectively.
  • the walls of the grooves flare outwardly from the base to the inwardly directed surface of the lug 15 and the grooves correspondingly taper from their base to their apex.
  • This jamming interference serves securely to hold the flange 27 and hence the rod 19 in the desired position.
  • a similar configuration is provided at the base of the rod 18.
  • Figure 5 also shows most clearly a calibrated angular scale provided around the hemispherical upper surface of the lug 15 and a pointer 47 provided on the underside of the collar 29 to indicate the angle of tilt before the nut 31 is tightened on the bolt 23.
  • a similar angular scale is provided on the lug 14 to facilitate appropriate orientation of the drill.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
EP83106007A 1982-07-12 1983-06-20 Bohrständer Withdrawn EP0100421A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US39729382A 1982-07-12 1982-07-12
US397293 1982-07-12

Publications (2)

Publication Number Publication Date
EP0100421A2 true EP0100421A2 (de) 1984-02-15
EP0100421A3 EP0100421A3 (de) 1985-12-04

Family

ID=23570612

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83106007A Withdrawn EP0100421A3 (de) 1982-07-12 1983-06-20 Bohrständer

Country Status (1)

Country Link
EP (1) EP0100421A3 (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT384976B (de) * 1985-11-20 1988-02-10 Pfohl Hans Vorrichtung zur halterung eines bohrgeraetes
EP0392390A2 (de) * 1989-04-13 1990-10-17 Hans Grafl Verfahren zum Ausbessern von Astlöchern bei Schnittholz
US5150993A (en) * 1992-01-30 1992-09-29 Bernard Miller Pivot assembly for tool guide
US7607870B2 (en) * 2006-11-02 2009-10-27 Hughes Jr Robert K Rotary tube notching apparatus
US8734066B2 (en) 2011-03-23 2014-05-27 Christopher J. Rusch Hole saw tube notcher
CN112658741A (zh) * 2021-01-08 2021-04-16 全茂林 一种五金件辅助钻孔装置
US20210276108A1 (en) * 2020-03-03 2021-09-09 Välinge Innovation AB Machine

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE360021C (de) * 1922-09-29 Paul Hoffmann Bohrgestell fuer Handbohrmaschinen mit einer oder zwei Saeulen
CH241795A (de) * 1945-03-19 1946-03-31 Studer Henri Gelenk für Tragvorrichtungen.
US2909083A (en) * 1958-06-13 1959-10-20 Isaac O Chestnut Drill press stand attachment
FR2106757A5 (de) * 1970-09-25 1972-05-05 Tubauto
US3874810A (en) * 1973-06-21 1975-04-01 Portalign Tool Company Drill guide
DE2812296A1 (de) * 1978-03-21 1979-10-04 Karl Klein Stativ fuer eine heimwerker-kombinationsmaschine

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE360021C (de) * 1922-09-29 Paul Hoffmann Bohrgestell fuer Handbohrmaschinen mit einer oder zwei Saeulen
CH241795A (de) * 1945-03-19 1946-03-31 Studer Henri Gelenk für Tragvorrichtungen.
US2909083A (en) * 1958-06-13 1959-10-20 Isaac O Chestnut Drill press stand attachment
FR2106757A5 (de) * 1970-09-25 1972-05-05 Tubauto
US3874810A (en) * 1973-06-21 1975-04-01 Portalign Tool Company Drill guide
DE2812296A1 (de) * 1978-03-21 1979-10-04 Karl Klein Stativ fuer eine heimwerker-kombinationsmaschine

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT384976B (de) * 1985-11-20 1988-02-10 Pfohl Hans Vorrichtung zur halterung eines bohrgeraetes
EP0392390A2 (de) * 1989-04-13 1990-10-17 Hans Grafl Verfahren zum Ausbessern von Astlöchern bei Schnittholz
EP0392390A3 (de) * 1989-04-13 1992-02-26 Hans Grafl Verfahren zum Ausbessern von Astlöchern bei Schnittholz
US5150993A (en) * 1992-01-30 1992-09-29 Bernard Miller Pivot assembly for tool guide
US7607870B2 (en) * 2006-11-02 2009-10-27 Hughes Jr Robert K Rotary tube notching apparatus
US8734066B2 (en) 2011-03-23 2014-05-27 Christopher J. Rusch Hole saw tube notcher
US20210276108A1 (en) * 2020-03-03 2021-09-09 Välinge Innovation AB Machine
CN112658741A (zh) * 2021-01-08 2021-04-16 全茂林 一种五金件辅助钻孔装置

Also Published As

Publication number Publication date
EP0100421A3 (de) 1985-12-04

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

PUAL Search report despatched

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18D Application deemed to be withdrawn

Effective date: 19860103

RIN1 Information on inventor provided before grant (corrected)

Inventor name: CHARNLEY, PETER W.