EP0234066A1 - Vorrichtung zum Bohren von Hand - Google Patents

Vorrichtung zum Bohren von Hand Download PDF

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Publication number
EP0234066A1
EP0234066A1 EP86300361A EP86300361A EP0234066A1 EP 0234066 A1 EP0234066 A1 EP 0234066A1 EP 86300361 A EP86300361 A EP 86300361A EP 86300361 A EP86300361 A EP 86300361A EP 0234066 A1 EP0234066 A1 EP 0234066A1
Authority
EP
European Patent Office
Prior art keywords
workpiece
transfer member
load transfer
drill
holder
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.)
Granted
Application number
EP86300361A
Other languages
English (en)
French (fr)
Other versions
EP0234066B1 (de
Inventor
Karl Arne Karlsson
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.)
Karlsson Karl Arne
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
Priority to US06/397,537 priority Critical patent/US4565470A/en
Application filed by Individual filed Critical Individual
Priority to EP19860300361 priority patent/EP0234066B1/de
Priority to DE8686300361T priority patent/DE3667034D1/de
Publication of EP0234066A1 publication Critical patent/EP0234066A1/de
Application granted granted Critical
Publication of EP0234066B1 publication Critical patent/EP0234066B1/de
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B25F5/026—Construction of casings, bodies or handles with torque reaction bars for rotary tools in the form of an auxiliary handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25F—COMBINATION OR MULTI-PURPOSE TOOLS NOT OTHERWISE PROVIDED FOR; DETAILS OR COMPONENTS OF PORTABLE POWER-DRIVEN TOOLS NOT PARTICULARLY RELATED TO THE OPERATIONS PERFORMED AND NOT OTHERWISE PROVIDED FOR
    • B25F5/00—Details or components of portable power-driven tools not particularly related to the operations performed and not otherwise provided for
    • B25F5/02—Construction of casings, bodies or handles
    • B25F5/025—Construction of casings, bodies or handles with torque reaction bars for rotary tools
    • B25F5/028—Construction of casings, bodies or handles with torque reaction bars for rotary tools to be supported by a fixed object

Definitions

  • the present invention relates to a method and apparatus for use with a portable hand-drill.
  • Portable hand-drilling operations in the field have been known to suffer certain drawbacks stemming from difficulty in controlling the drill, particularly heavy drills, and difficulty in holding the workpieces. These problems not only can affect accuracy, quality and rate of production but they also seriously risk the safety of the drill operator.
  • vices To avoid the problem caused by a rotating workpiece, vices have been used. However, the problem of torque stress exerted on the operator's body still persists which can cause serious injury. Moreover, the use of vices seriously slows operations because for each drilling operation, the vice must be loosened, relocated and reset.
  • Another object of the present invention is to provide novel apparatus for holding a hand drill during a drilling operation to remove stress from the drill operator.
  • a further object of the present invention is to provide novel apparatus for preventing rotation of a workpiece being hand-drilled.
  • Another object of the present invention is to provide novel apparatus for holding a hand drill while preventing movement of the workpiece being drilled during a drilling operation.
  • a still further object of the present invention is to provide novel method and apparatus of the type described which may be applied to conventional hand drills or newly designed hand drills and which are easy and safe to operate.
  • a still further object of the present invention is to provide such an apparatus as described above and which is also portable and easily assembled or disassembled.
  • Yet a further object of the present invention is to provide such apparatus that may be manufactured either as a portable attachment for conventional or new hand drills of various designs or as part of the hand drill itself. Included herein is the provision of such apparatus that possesses relatively few parts that may be economically mass produced for retail at relatively low cost and yet will be reliable over long periods of repeated use without breakdown to improve hand drillling performance and safety.
  • apparatus for use with a portable hand drill having a body, characterised in that the apparatus comprises an elongate rigid load transfer member having a free end, and means, affixable to the body of the hand drill for mounting the hand drill on said load transfer member such that the free end of the load transfer member may be placed against a workpiece to be drilled during a drilling operation to transfer torque through the load transfer member and into the workpiece, thereby diverting torque from the user's body while securing the hand drill relative to the workpiece without attaching the load transfer member to the workpiece.
  • apparatus comprising a portable hand drill having a body and a chuck mounted to the body for rotation, at least one handle projecting from the body above the chuck for manipulating the drill, characterised in that said apparatus further comprises a yoke positioned between the handle and chuck and securable to the body against rotation, said yoke having an arm projecting laterally therefrom, an elongate rigid load transfer member having a free end adapted to be freely engaged against a workpiece to be drilled, means mounting the arm to the load transfer member against rotation relative thereto, such that during a drilling operation the free end of the load transfer member is placed against the workpiece to transfer torque through the load transfer member and onto the workpiece, to divert torque stress from the user's body, while securing the hand drill to the workpiece without attaching the load transfer member to the workpiece, said means comprising a holder receiving said arm for slidable movement of said arm, relative to the holder, into one of a plurality of selectable positions, said
  • a hand drill is held in a holder which may be mounted for movement along a load transfer member which may be termed a "jack".
  • a load transfer member which may be termed a "jack”.
  • the jack is located to extend alongside of the workpiece so that the torque generated in the workpiece will tend to cause the workpiece to rotate against the jack while the equal but oppositely directed reaction torque will be transferred from the drill through the jack and into the workpiece, thus tending to rotate the jack against the workpiece. Since these torques are equal in magnitude but oppositely directed, the result will be that the workpiece is held stationary against the jack and vice versa.
  • the reaction torque is diverted from the operator's body and transferred back to the workpiece.
  • the jack may be anchored against another object or against the foot of the operator to divert stress from the upper part of the operator's body.
  • the holder may be tightly fastened to the jack so that they move together as a unit with advancement of the drill.
  • the holder may be made as a portable attachment to the hand drill or as a part of the body of the hand drill.
  • two holders and jacks may be employed respectively on diametrically opposite sides of the hand drill.
  • Hand drill 10 itself may be any conventional hand drill for drilling holes in a workpiece W as shown in Fig.1 resting on a surface 11.
  • Hand drill 10 typically includes a chuck 14 for holding a rotary cutting tool or bit 12.
  • the chuck 14 is rotatable by a motor in the drill housing, driven by power fed through a power cord 16 and controlled by a trigger 17 lying below a handle 18.
  • Additional handles 20 and 22 are also incorporated. In conventional drilling operations the operator grasps handles 18 and 20.
  • the apparatus includes at least one load transfer member designated 30, and means for mounting or connecting the hand drill 10 to the load transfer member 30 as will be described in greater detail below.
  • load transfer members 30 which may also be termed "jacks" each in the form of a sturdy, rigid pipe or rod of steel or other suitable material located laterally of the drill 10 at diametrically opposed locations.
  • the means for mounting the drill 10 to each jack 30 in the specific embodiment shown in Fig.1 comprises a holder designated 40, and an arm 50 fixed to the hand drill 10 and received by the holder 40.
  • the arm 50 is formed as an inseparable part of the drill 10 itself, it is preferred to form the arm 50 as part of a yoke 52 or other similar means that may be releasably secured to the body of drill 10 as shown in Fig.1.
  • holder 40 is formed by a tubular steel member having a rectangular cross section and having a through passage 46 extending to opposite, open ends of the holder 40.
  • Arm 50 is formed by a steel bar of rectangular cross section, corresponding to that of the internal passage 46 of holder 40, to be slidable therein into any desired position.
  • Arm 50 may be formed as an integral part of yoke 52 or may be welded thereto so that it rigidly projects laterally therefrom.
  • Yoke 50 may take any desired form that will enable fixation to the body of the drill 10.
  • yoke 52 is in the nature of a C clamp or shackle which is dimensioned to encircle the pertinent portion of the body of the drill 10 which portion is shown as cylindrical in shape and located in the region above the chuck 14.
  • Yoke 52 terminates in apertured flanges 56 secured together by a nut and bolt assembly 57,58. It will be obvious that other yokes and yoke shapes may be employed depending on the size and shape of the associated drill body. Moreover, other types of methods and means may be employed to interconnect the drill body to the associated jacks 30.
  • any suitable releasable fastening device or means may be employed.
  • One simple method is to utilize a thumb screw or set screw such as 60 (Fig.3) threaded through the wall of holder 40 so that its internal extremity engages against the arm 50.
  • a wrench may be applied to the head of screw 60 to sufficiently tighten it against arm 50.
  • the preferred embodiment includes a sleeve-like member 42 fixed, such as by welding to one side of the holder 40.
  • Sleeve-like member 42 has a vertical through passage for slidably receiving jack 30 to permit the holder 40 to slide downwardly along the jack 30 as the drill 10 advances during a drilling operation, in cases where the lower end of the jack 30 is engaged or grounded against a surface such as 11.
  • a releasable fastening device is employed to exert a desired degree of pressure against the jack 30.
  • a simple set screw or thumb screw 44 is utilized in the wall of the sleeve-like member 44 to be engageable with jack 30 to control the movement of holder 40 along jack 30 during a drilling operation where the end of the jack 30 is grounded against a support surface.
  • the extremity of jack 30 adjacent of the workpiece W will not be grounded on a support surface such as 11 in which case the screw 44 may be tightly fastened against the jack 30 so that the holder 40 and jack 30 will move together as a unit with the drill 10 as the latter advances during drilling.
  • the jack 30 is provided with a cap 32 larger in diameter or cross dimension than that of the internal passage of sleeve member 42.
  • Both of the jacks 30 and holders 40 utilized in the embodiment of Fig.1 are identical. Moreover, their positions may be changed, for example, from that of Fig.1 to that of Fig.2, in order to reduce the distance between the jacks 30 and so to accommodate workpieces of smaller length such as W1 shown in Fig.2.
  • the open opposite ends of the holders 40 allow the arms 50 to be inserted through either end of the holder as may be required.
  • the dotted lines in Fig. 1 illustrate a position of jacks 30 that may be used for a larger workpiece.
  • the holders 40 with their jacks 30, are positioned on the arms 50 with jacks 30 located on opposite sides of arms 50. Holders 40 are then slid along arms 50 into the desired position depending on the length of the workpiece W and with jacks 30 equidistant from the centre of the drill or bit 12. Once the holders are adjusted into proper position, screws 60 are then fastened against arms 50 to secure the latter in holders 40.
  • the drill 10 may then be positioned to place the jacks 30 on opposite sides of the workpiece W as shown in Fig.3. The operator may then grasp handles 18 and 20 or 18 and 22 and commence drilling.
  • arrow 70 illustrates the direction of rotation of drill bit 12.
  • a torque will be generated in the workpiece W in a direction indicated by arrows T1.
  • a reaction torque will be generated in drill 10 but this torque will be transferred from drill 10 through jacks 30 and into the workpiece.
  • the reaction torque is indicated by the arrow T2 in Fig.4.
  • the torques T1 and T2 are equal and oppositely directed, the workpiece will be held stationary against the sides of jacks 30 and vice versa.
  • the torque generated in drill 10 will be diverted away from the operator and back into the workpiece W. The result is a smooth and efficient drilling operation with no harmful torque stress received by the operator.
  • FIG. 5 to 7 there is illustrated another preferred embodiment of apparatus of the invention which may be applied to a conventional hand drill 80 that is of a smaller size than hand drill 10 of Figs. 1 to 4.
  • Hand drill 80 itself may be conventional and includes a handle 81 and a control button or trigger 83 for controlling the motor which is housed within the drill 80.
  • the apparatus of the present invention in the embodiment of Figs. 5 to 7 includes a holder 82 similar to holder 40 described above and including a through passage 84 and a sleeve 86 for receiving a jack 30.
  • sleeve 80 is fixed to the side wall of holder 82 by a bracket 87 which may be welded to holder 82.
  • a thumb screw 88 is provided through the bracket 87 and sleeve 86 to be engageable with jack 30 to fix or control its position.
  • holder 82 Slidably recieved in holder 82 is an arm 90 which is held in any desired position by thumb screw 91.
  • holder 82 is provided with another threaded opening at 92 (see Fig.5) for receiving thumb screw 91.
  • Arm 90 is fixed to a yoke 94 which in the specific form includes a continuous polygonal enclosure made from any suitable sturdy material and shaped to correspond to the external shape of the drill 80 above the chuck 79.
  • yoke 94 includes a front wall 95, a rear wall 96 generally parallel to the front wall 95 and opposite side walls 97 defining a cavity for receiving the drill 80.
  • Arm 90 projects laterally from front wall 95 at the centre thereof where it may be integrally joined or welded.
  • the front wall 95 has a flange 98 projecting upwardly therefrom to extend along the casing of the drill 80 as shown in Fig. 5.
  • a bolt 99 is received through a threaded aperture in flange 98 for engagement against the housing of the drill 80 as shown in Fig.5.
  • Advancement of bolt 99 will secure the drill 80 within the yoke 94.
  • another support (not shown) may be used to anchor the jack 30 to transmit reaction torque to the support.
  • the operator may take place the jack 30 against his foot to steady the drill and divert stress away from his arms.
  • the jacks 30 are secured within the sleeves 42 so that they will advance with the drill as the drilling proceeds.
  • the presnt invention may be used in drilling large or small workpieces without subjecting the operator to harmful torque stress.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Drilling And Boring (AREA)
EP19860300361 1982-07-12 1986-01-20 Vorrichtung zum Bohren von Hand Expired EP0234066B1 (de)

Priority Applications (3)

Application Number Priority Date Filing Date Title
US06/397,537 US4565470A (en) 1982-07-12 1982-07-12 Apparatus for hand drilling
EP19860300361 EP0234066B1 (de) 1986-01-20 1986-01-20 Vorrichtung zum Bohren von Hand
DE8686300361T DE3667034D1 (en) 1986-01-20 1986-01-20 Apparatus for hand drilling

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19860300361 EP0234066B1 (de) 1986-01-20 1986-01-20 Vorrichtung zum Bohren von Hand

Publications (2)

Publication Number Publication Date
EP0234066A1 true EP0234066A1 (de) 1987-09-02
EP0234066B1 EP0234066B1 (de) 1989-11-23

Family

ID=8195858

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860300361 Expired EP0234066B1 (de) 1982-07-12 1986-01-20 Vorrichtung zum Bohren von Hand

Country Status (2)

Country Link
EP (1) EP0234066B1 (de)
DE (1) DE3667034D1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10163684A1 (de) * 2001-12-21 2003-07-10 Hytec Gmbh Hydraulikwerkzeuge Schrauber
EP2020279A1 (de) 2007-07-31 2009-02-04 HILTI Aktiengesellschaft Momenthebel

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE202023100468U1 (de) 2023-01-31 2024-02-23 Techtronic Cordless Gp Werkzeug zum Befestigen eines Schraubverbinders

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2849900A (en) * 1954-11-02 1958-09-02 Jr Martin C Heidtman Portable frame for power hand drills
US2990732A (en) * 1959-06-24 1961-07-04 William J S Ide Hand drill gauge and hole setter
US2997900A (en) * 1959-11-09 1961-08-29 Lawrence E Pugsley Multipurpose tool fixture
US3362447A (en) * 1965-04-22 1968-01-09 Walter Elder Jr. Dowel hole drilling device
US3874810A (en) * 1973-06-21 1975-04-01 Portalign Tool Company Drill guide
US4082474A (en) * 1977-01-07 1978-04-04 Stiger Darrel E Drill attachment
WO1981000369A1 (en) * 1979-08-06 1981-02-19 Black & Decker Inc Tool guide

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2849900A (en) * 1954-11-02 1958-09-02 Jr Martin C Heidtman Portable frame for power hand drills
US2990732A (en) * 1959-06-24 1961-07-04 William J S Ide Hand drill gauge and hole setter
US2997900A (en) * 1959-11-09 1961-08-29 Lawrence E Pugsley Multipurpose tool fixture
US3362447A (en) * 1965-04-22 1968-01-09 Walter Elder Jr. Dowel hole drilling device
US3874810A (en) * 1973-06-21 1975-04-01 Portalign Tool Company Drill guide
US4082474A (en) * 1977-01-07 1978-04-04 Stiger Darrel E Drill attachment
WO1981000369A1 (en) * 1979-08-06 1981-02-19 Black & Decker Inc Tool guide

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10163684A1 (de) * 2001-12-21 2003-07-10 Hytec Gmbh Hydraulikwerkzeuge Schrauber
DE10163684B4 (de) * 2001-12-21 2006-05-04 Hytec Gmbh Hydraulikwerkzeuge Und Antriebstechnik Schrauber
EP2020279A1 (de) 2007-07-31 2009-02-04 HILTI Aktiengesellschaft Momenthebel
DE102007000417A1 (de) 2007-07-31 2009-02-05 Hilti Aktiengesellschaft Momenthebel

Also Published As

Publication number Publication date
EP0234066B1 (de) 1989-11-23
DE3667034D1 (en) 1989-12-28

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