EP1464450A1 - Mécanisme de guidage angulaire pour outils - Google Patents

Mécanisme de guidage angulaire pour outils Download PDF

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Publication number
EP1464450A1
EP1464450A1 EP04445041A EP04445041A EP1464450A1 EP 1464450 A1 EP1464450 A1 EP 1464450A1 EP 04445041 A EP04445041 A EP 04445041A EP 04445041 A EP04445041 A EP 04445041A EP 1464450 A1 EP1464450 A1 EP 1464450A1
Authority
EP
European Patent Office
Prior art keywords
hinges
enclosing
support assembly
enclosed
arm
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Withdrawn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
EP04445041A
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German (de)
English (en)
Inventor
Stefan Svensson
Henrik Odén
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.)
Techneo AB
Original Assignee
Techneo AB
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 Techneo AB filed Critical Techneo AB
Publication of EP1464450A1 publication Critical patent/EP1464450A1/fr
Withdrawn legal-status Critical Current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

Definitions

  • the present invention relates to a mechanism for angular guiding of tools, in particular electrically powered portable tools and tools powered by compressed air such as screw-drivers and hand boring and drilling machines.
  • devices for fixing, supporting or guiding hand tools and portable tools require mechanisms allowing that the angular positions of the tools in relation to a reference or base are maintained or are controlled in a an intended way.
  • a mechanism can include at least two mechanically stiff elements such as connection arms or bars. They are at one end articulated at hinges of the reference or base and at the other, opposite end articulated at hinges of a support for a tool.
  • the distance between the hinges of each element can e.g. be identical, this allowing the tool support and thereby a tool attached to the support to always have the same angular position in relation to the reference or base and hence, in the case where the reference or base is stationary, also to a vertical or horizontal line.
  • portions of the body, such as fingers, of an operator or another person staying in the vicinity of the guiding mechanism can be pinched or squeezed between the connection arms of the mechanism and cause damage to said body portions.
  • a mechanism or device for guiding a tool includes two stiff elements, herein called arms, a first arm and a second arm.
  • the first and second arms are connected by hinges at first ends to a first support assembly, that is intended to be stationarily mounted such as attached to a stationary reference or base and is called a wall support assembly.
  • the arms are at second, opposite ends connected by hinges to a second support assembly, which is intended to carry a tool that is rigidly mounted thereto and which is called a tool support assembly.
  • the axes of the all the hinges are parallel to each other. Hence, the hinges allow the second support assembly to move in a single plane that is fixed in relation to the first support assembly.
  • the second arm includes a portion that at least partly encloses a portion of the first arm.
  • the enclosed portion of the first arm moves some small distance along the first arm and also a small distance in a perpendicular direction.
  • the enclosing portion can be easily gripped by an operator for moving the tool and making the arms swing.
  • a line between the hinges of the second arm can pass outside the enclosing portion of the second arm and/or this line can be located at a distance of a plane that is parallel to the axes of the hinges and passes through the outmost portion of the enclosing portion taken in a direction from the hinges of the first arm to the hinges of the second arm and/or a plane through the hinges of the second arm can pass outside the enclosing portion, at some distance thereof, either of these conditions being valid at least in middle swinging positions where the first or second arm takes positions in which a line between its hinges is substantially perpendicular to the line connecting the hinges at the first or second support assemblies.
  • the enclosed portion of the first arm has an outer shape corresponding to that of a bar or rod that preferably is straight.
  • the enclosing portion is preferably a middle portion of the second arm and it can also have an outer shape corresponding to that of a bar or rod that preferably is straight or at least is similar to the shape of the enclosed portion.
  • the outer dimension of the enclosing portion, taken in a direction perpendicular to the axes of the hinges, can be smaller than the distance between the hinges at first support assembly and/or at the second assembly, at least when the first or second arm takes said middle positions.
  • the outer dimension of the enclosing portion taken in a direction perpendicular to the axes of the hinges, can e.g. be at most three times the outer dimension of the enclosed portion taken in the same direction, such between two and three times said outer dimension. It can in a practical embodiment be about 2.5 times said outer dimension.
  • the second arm can include end portions that also have outer shapes corresponding to those of bars or rods that can be straight and then the hinges of the second arm are located at the end portions. Such end portions then extend in oblique angles to the enclosing middle portion of the second arm, and the oblique angles can e.g. be in the range of 15 - 75° and in particular in the range of 20 - 40°.
  • Figs. 1 and 2 are side views of a mechanism for guiding a portable tool, the mechanism including a first support assembly 1 for attachment to a reference or base such as a wall indicated at 2, the first support assembly herein called the wall support assembly, and a second support assembly 3, herein called the tool support assembly, to which the portable tool, indicated by the outline at 4, is intended to be mounted.
  • a stiff, first arm 5 is by hinges 6, 7 pivotably mounted to the wall and tool support assemblies, respectively, the hinges having parallel pivoting axes. Hence, if the wall support assembly 3 is assumed to be stationary, the tool support assembly 3 can only move in one plane.
  • the first arm 5 can be designed e.g. as a substantially straight bar, as illustrated, having a suitable cross-sectional shape.
  • a stiff, second arm 8 is by hinges 9, 10 pivotably mounted to the wall and tool support assemblies 1, 3, respectively, the hinges having pivoting axes parallel to each other and to those of the hinges 6, 7 of the first arm 5.
  • the distance between the pivoting axes of the hinges mounted to the first arm and the distance between the pivoting axes of the hinges mounted to the second arm are equal to each other and the distance between the pivoting axes of the hinges mounted to the wall support assembly 1 and the distance between the pivoting axes of the hinges mounted to the tool support assembly 3 are in the illustrated embodiment equal to each other.
  • a parallelogram is formed by the support assemblies and the two arms, the parallelogram having comers at the axes of the hinges.
  • the second arm 8 has a middle portion 11 that at least partly encloses or surrounds a middle portion of the first arm 5.
  • the enclosing middle portion 11 can be substantially straight and has a bore 12 or through-hole extending in its longitudinal direction, as seen in Fig. 3.
  • the bore or longitudinal hole 12 has a size allowing the enclosed portion of the first arm 5 to be displaced therein, when swinging the arms, the enclosed portion then moving inside and in relation to the enclosing portion 11 both in a direction along the first arm and in directions perpendicular to this direction and also to that of the axes of the hinges 6, 7, 9, 10.
  • the middle portion 11 can for instance include a circular tube or pipe.
  • the bore or longitudinal hole 12 can be circular and have a diameter that is significantly larger than the largest dimension, such as the diameter, of the cross-section of the first arm 5.
  • the longitudinal hole 12 is a rectangular, it can have a width substantially agreeing with or being only somewhat larger than the width of the first arm 5, in particular than the width of the enclosed portion. This will give the mechanism an enhanced stability, especially if the first arm has a square or rectangular shape.
  • the width is herein taken in directions parallel to the hinge axes.
  • the rectangle profile of the longitudinal hole must then be given a height allowing the movement of the enclosed portion of the first arm when operating the guiding mechanism to the various positions for which it is intended.
  • the height of the rectangular hole must e.g. be about the sum of the diameter of of the enclosed portion and 0.6 of the distance between the hinges at one of the support assemblies for allowing a movement of the mechanism to positions of ⁇ 45° from the perpendicular position of Fig. 2.
  • the first arm 5 and the enclosing portion 11 of the second arm 8 can be pieces of pipes, such as pipes having a uniform wall thickness and cross-sections which have outer and inner profiles that are circular, square or rectangular.
  • the second arm 8 has end portions 13 connected to the middle portion 11 at their one ends and mounted to the respective hinges 9, 10 at their other ends. These end portions can as illustrated extend in oblique directions from the middle portion, the middle and end portions having generally outer shapes corresponding to that of elongated bodies of constant cross-sections such as those of bars or rods.
  • the oblique angles can e.g. be in the range of 15 - 75° such as in the range of 20 - 40° and about 30° in relation to the longitudinal direction of the middle portion 11.
  • the middle portion 11 and the first arm 5 can e.g. as illustrated be circular pipes having substantially the same wall thickness, the inner diameter of the middle portion being e.g. about 2.5 times that of the first arm or at least the diameter of the portion of the first arm that is enclosed by the second arm when the mechanism is allowed to swing.
  • the enclosing portion 11 is a rectangular pipe.
  • the enclosing portion 11 can be easily gripped or operated by an operator of the hand tool 4 with a small risk of having fingers or other body parts squeezed or pinched by portions of the first and second arms.
  • the enclosing portion also protects the enclosed portion from mechanical damage.
  • the tool 4 carried by the mechanism can put a too strong mechanical stress on the mechanism and then, if the enclosed portion would be bent, the bending will be stopped by the enclosing portion, in particular if the longitudinal through-hole 12 in the enclosing portion 11 is designed to have a minimum diameter or a minimum width, still allowing the normal movement of the first arm 5 when the mechanism is operated.
  • the guiding mechanism is most often operated by moving the tool 4 or the tool support assembly 4, but it can also be operated at the enclosing portion.
  • the enclosing portion 11 has a small extension as seen in directions between the two arms 5, 8. Also, in the positions of the mechanism illustrated in Figs. 1 and 2 it is observed that a line between and a plane through the hinges 9, 10 of the second arm 8 are located completely outside the enclosing portion 11 of the second arm.
  • the total outer dimension of the enclosing portion 11, as seen in a direction between the axes of the hinges of one of the support assemblies 1, 3 is suitably also smaller than the distance between the hinges 6, 9 and 7, 10 at the first support assembly and/or at the second assembly, at least when the first or second arm take the positions of Figs. 1 and 2.
  • the outer dimension of the enclosing portion 11, seen in said direction can e.g. be at most three times the outer dimension of the enclosed portion taken in the same direction, such between two and three times said outer dimension.
  • the outer surfaces of the enclosing portion 11 has advantageously a smooth shape without any sharp edges, e.g. having upper and lower surfaces that are rounded or curved, these being the surfaces of the enclosing portion that are located in directions parallel to a line between the hinges at either support assembly when the mechanism has the perpendicular position of Fig. 2.
  • the second arm 8 takes most of the mechanical stress imposed to the mechanism when using it for guiding a tool 4 that can be quite heavy.
  • the first arm 5 then acts only for maintaining the angular position of the tool and is primarily subjected to buckling stress.
  • the wall support assembly 1 can include a wall support part 14 intended to be rigidly mounted to e.g. a wall 2 and triangular side plates 15, rigidly attached to the wall support part.
  • the wall support 14 then includes parts of the wall side hinge 6 for the first arm and at the free comers of the triangular plates is the wall side hinge 9 for the second arm mounted.
  • the wall support 14 can have a free end, opposite an end at which the triangular plates are attached, at which a hinge 16 for an inner end of a balancing device 17 is mounted.
  • the balancing device 17 can have an elongated, tubular shape and include some elastic and mechanically attenuating means, not shown.
  • the tool support assembly 3 can include a tool support part 20 intended to carry the tool 4 and triangular side plates 21, rigidly attached to the tool support part.
  • the tool support 20 then includes parts of the tool side hinge 7 for the first arm 5 and at the free comers of the triangular side plates is the tool side hinge 10 for the second arm mounted.
  • the enclosing portion can only surround the enclosed portion at two or three sides, the space in which the first arm is located then being only a longitudinal recess.
  • the oblique portions of the second arm can have a more triangular shape as seen from the side.
  • a line between the hinges at the wall support can be parallel to the wall or form an angle therewith.
  • the hinge axes can form a geometrical figure that is not a perfect parallelogram, such an arrangement allowing a more complicated guiding movement of the tool.
  • More than two swingable arms can be arranged, e.g. for giving the tool an enhanced stability, a more accurate angle and a more accurate position.
  • At least one arm can then have portion at least partly enclosing another arm, e.g. in a manner to reduce the total size of the mechanism or for providing a shielding to part of the mechanism.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Manipulator (AREA)
EP04445041A 2003-04-03 2004-04-02 Mécanisme de guidage angulaire pour outils Withdrawn EP1464450A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0300978A SE0300978D0 (sv) 2003-04-03 2003-04-03 Mekanism för vinkelstyrning av verktyg
SE0300978 2003-04-03

Publications (1)

Publication Number Publication Date
EP1464450A1 true EP1464450A1 (fr) 2004-10-06

Family

ID=20290917

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04445041A Withdrawn EP1464450A1 (fr) 2003-04-03 2004-04-02 Mécanisme de guidage angulaire pour outils

Country Status (2)

Country Link
EP (1) EP1464450A1 (fr)
SE (1) SE0300978D0 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2033733A1 (fr) * 2007-09-10 2009-03-11 Peugeot Citroen Automobiles SA Dispositif de vissage d'éléments de fixation disposés au-dessous d'une structure

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0534643A1 (fr) * 1991-09-24 1993-03-31 Mitsui Engineering and Shipbuilding Co, Ltd. Manipulateur
DE20004882U1 (de) * 2000-03-17 2000-05-31 Wienaeber Schweistechnik Ohg Manipulator

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0534643A1 (fr) * 1991-09-24 1993-03-31 Mitsui Engineering and Shipbuilding Co, Ltd. Manipulateur
DE20004882U1 (de) * 2000-03-17 2000-05-31 Wienaeber Schweistechnik Ohg Manipulator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2033733A1 (fr) * 2007-09-10 2009-03-11 Peugeot Citroen Automobiles SA Dispositif de vissage d'éléments de fixation disposés au-dessous d'une structure
FR2920682A1 (fr) * 2007-09-10 2009-03-13 Peugeot Citroen Automobiles Sa Dispositif de vissage d'elements de fixation disposes au-dessous d'une structure

Also Published As

Publication number Publication date
SE0300978D0 (sv) 2003-04-03

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