EP0597216A1 - Tournevis - Google Patents

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Publication number
EP0597216A1
EP0597216A1 EP93115064A EP93115064A EP0597216A1 EP 0597216 A1 EP0597216 A1 EP 0597216A1 EP 93115064 A EP93115064 A EP 93115064A EP 93115064 A EP93115064 A EP 93115064A EP 0597216 A1 EP0597216 A1 EP 0597216A1
Authority
EP
European Patent Office
Prior art keywords
handle
screwing tool
sharp
edged
tips
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Withdrawn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
EP93115064A
Other languages
German (de)
English (en)
Inventor
Hardy Haberstroh
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.)
Willi Hahn GmbH and Co KG
Original Assignee
Willi Hahn GmbH and Co KG
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 claimed from DE9214998U external-priority patent/DE9214998U1/de
Application filed by Willi Hahn GmbH and Co KG filed Critical Willi Hahn GmbH and Co KG
Publication of EP0597216A1 publication Critical patent/EP0597216A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/10—Handle constructions characterised by material or shape
    • B25G1/105—Handle constructions characterised by material or shape for screwdrivers, wrenches or spanners
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C1/00—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods
    • B24C1/06—Methods for use of abrasive blasting for producing particular effects; Use of auxiliary equipment in connection with such methods for producing matt surfaces, e.g. on plastic materials, on glass

Definitions

  • the invention relates to a hand-operated screwing tool with a blade and a handle.
  • Tools of the type mentioned here are understood to mean screwdrivers, nut drivers, socket wrenches which have blades or plug-in or plug-in blades which are firmly connected to a handle.
  • a screwing tool is preferred in which the tips are formed on the surface in such a way that when the tool is handled they protrude at least with their head region from the liquid film. This means that a liquid film made of sweat or oil, for example, is penetrated by the tips. When handling the screwing tool, the liquid is displaced into the spaces or valleys between the tips, so that the latter enable the screwing tool to be handled in a non-slip manner.
  • An embodiment of the screwing tool is preferred in which sharp-edged material particles are allowed to act on the surface of the handle by means of a blasting process.
  • the material particles tear particles out of the surface of the handle so that the sharp-edged tips mentioned remain. The sharpness of the tips is ensured by the use of sharp-edged material particles.
  • a screwing tool is preferred in which the surface of the handle is processed with the aid of corundum, preferably cast steel corundum.
  • the material particles can be reused, if necessary after carrying out a cleaning process, and therefore enable particularly economical use.
  • a screwing tool in which approximately 80% of the handle surface is provided with tips is particularly preferred. It is possible that the tips are arranged in strip-like areas that span the handle in the longitudinal and / or transverse direction. Ultimately, this means that the grip of the screwing tool can be adapted to the desired application in a wide range.
  • the invention also relates to a method for producing a hand-operated screwing tool.
  • a method which is characterized by the features listed in claim 9.
  • the surface of the handle is subjected to a blasting process, at least in some areas, in order to form sharp-edged tips which are arranged so closely that injury to the user of the tool is excluded, but on the other hand a high grip is ensured.
  • a nozzle is used in the blasting method, which is guided over the surface of the handle in such a way that excessive heating of the surface is excluded.
  • the nozzle is preferably guided in an oscillating manner.
  • An embodiment of the method in which sharp-edged material is particularly preferred alparticles are used whose grain size is in the range from 0.8 mm to 1.25 mm. Sharp-edged particles of this size tear particles out of the surface of the handle when the blasting process is carried out, so that a desired roughness is achieved in that the sharp-edged tips remain. These ensure non-slip handling of the screwing tool, even if the user has wet or oil-soiled hands.
  • the hand-operated screwdriver described below is designed as a conventional screwdriver.
  • the invention relates to all types of hand-operated screwing tools, in addition to screwdrivers, nut drivers, socket wrenches, tools with fixed blades and those with reversible blades are equally covered.
  • so-called clamp lifters, scrapers, rolling tools, reamers and pre-cutters are also recorded.
  • the tool shown in the figures is designed for Phillips screws. Of course, normal screwdrivers can also be implemented here.
  • the screwing tool 1 has a fixed blade 3 and a handle 5, which has a voluminous, essentially spherical base body for the fatigue-free transmission of larger torques.
  • the surface of the handle has been subjected to a blasting process in an area hatched for clarity, as a result of which sharp-edged tips are formed which, when handling the screwing tool, shear or pierce a liquid film of water or oil present between the hand and handle surface.
  • the surface structure of the area 7 is designed in such a way that the tips are very close together and therefore do not pose any risk of injury to the user. However, they are designed so that they protrude at least with their head area from the liquid film when handling the screwing tool and thus represent a good frictional connection between hand and handle.
  • the liquid film is displaced into the valleys lying between the peaks, so that water or oil can affect the grip of the screwing tool 1 very little.
  • the handle 5 of the screwing tool 1 is polygonal, the edges running essentially in the direction of the longitudinal axis of the tool being at different distances from one another, so that strips of different widths are formed.
  • FIG. 2 shows a further exemplary embodiment of the screwing tool 1 according to FIG. 1.
  • the same parts are provided with the same reference numbers, so that reference is made to the description of FIG. 1.
  • the screwing tool 1 in turn has a blade 3, which is designed to be stationary here, and a handle 5.
  • This has — shown here hatched — transverse strip-shaped regions 7 a, which are arranged at a distance from one another, transversely to the longitudinal direction of the tool.
  • the number, spacing and width of the strips can be varied as desired, so that the grip of the tool can be adapted to the application.
  • the regions 7a can in turn be produced by a blasting method already mentioned with reference to FIG. 1.
  • FIG. 3 shows a last exemplary embodiment of a screwing tool 1, which in turn has a fixed blade 3 and a handle 5.
  • This is again provided with, in turn, marked by hatching, essentially strip-shaped regions 7b, which here, however, extend practically parallel to the longitudinal direction of the tool.
  • the strip-shaped regions 7b are in turn produced by means of a blasting process.
  • the longitudinal extent of the strip-shaped regions 7b, their width and the spacing of the strips from one another can be adapted to the particular application of the tool.
  • the regions 7, 7a and 7b, as mentioned, are produced by means of a blasting method in which a gas, preferably air, which is under pressure is used as the carrier and / or transport medium.
  • the medium serves to blow sharp-edged material particles against the surface of the handle 5.
  • Corundum preferably cast steel corundum, but also glass splinters and / or glass shot are used as material particles.
  • the sharp-edged material particles blown against the surface of the handle 5 by the transport medium at high speed remove particles from the surface or tear them out of the handle surface.
  • tips remain on the handle surface, the size and spacing of which depends on the use of the size of the material particles which are blown against the surface by means of the carrier medium.
  • the material particles can be used several times, if necessary after a cleaning step. Finally, the material particles will wear out and lose their sharp edges, so that the tips formed on the grip surface in regions 7, 7a and 7b no longer have the necessary sharp edges.
  • the glass particles can also be used in pure form. However, it has been found that broken glass and broken glass can preferably only be used once. When used, the glass particles usually break down into such small particles that reuse is not possible.
  • a grain size of the sharp-edged material particles which is in the range from 0.4 mm to 1.6 mm is preferred. However, grain sizes of 0.8 mm to 1.25 mm are particularly preferred.
  • a continuous area 7 can be exposed to sharp-edged material particles, as shown in FIG. 1.
  • strip-shaped areas which are interrupted or continuous, and, as shown in FIG. 2, run around the handle 5 transversely to the longitudinal direction of the screwing tool.
  • the strips, as shown in FIG. 3 can run in the longitudinal direction over the handle surface and to be at a distance from one another.
  • An interrupted embodiment of the strip-shaped regions 7b is also conceivable here.
  • more or less punctiform areas that are subjected to a blasting process can be distributed over the surface of the handle 5.
  • the handle surface is subjected to a blasting process.
  • embodiments are preferred in which approximately 80% of the handle surface is treated with a blasting process and is therefore provided with tips. This results in an optimal grip of the tool.
  • Screwing tools 1 are preferred, the handle of which is made of an impact-resistant plastic.
  • a nozzle is used which is guided over the surface of the handle 5.
  • the nozzle is preferably moved in an oscillating manner over the surface, that is to say the surface is processed in quasi-linear fashion in adjacent strips.
  • the nozzle is preferably guided so that the small sharp-edged material particles used in the blasting process strike the surface of the handle 5 approximately perpendicularly. This results in particularly sharp-edged tips on the handle surface.
  • the blasting process itself is particularly easy to implement since it only requires the use of a pressurized gaseous transport or carrier medium.
  • Compressed air is preferably used which flows out through a nozzle and entrains the sharp-edged material particles.
  • the gas jet emerging from the nozzle is guided together with the entrained material particles onto the surface of the handle 5 of the screwing tool 1, the outflow rate being adaptable to the base material of the handle. It must be ensured that particles are torn out of the handle surface by the impacting material particles, so that sharp-edged tips remain there that are so close together that on the one hand injury to the user is excluded, but on the other hand it is ensured that a liquid film of water remains or oil is penetrated by the tips when the screwing tool is used.
  • the maximum roughness R max is 34.17 ⁇ m (0.96 ⁇ m), the average roughness depth R z is 29.87 ⁇ m (0.74 ⁇ m), the arithmetic mean roughness value R a is 5.66 ⁇ m (0.11 ⁇ m) , the roughness depth R T , that is, the distance between the bottom profile and a reference profile given in one measurement is 39.59 ⁇ m (1.06 ⁇ m). Furthermore, the profile depth P T measured between the top of a peak and the bottom of a valley is 48.40 ⁇ m (2.64 ⁇ m). Finally, the mean Rp is used to denote the mean smoothing depth, i.e. the distance between the highest point of the profile and the reference profile, for which a value of 11.26 ⁇ m (0.41 ⁇ m) was achieved. The values for conventional tools manufactured under the same conditions are given in brackets.
  • the maximum roughness R max is 55.40 ⁇ m (1.31 ⁇ m), the average roughness R z is 41.32 ⁇ m (1.15 ⁇ m), the arithmetic mean roughness value R a is 8.63 ⁇ m (0.19 ⁇ m) , the roughness depth R T , that is to say the distance between the basic profile and a reference profile given during a measurement, is 59.60 ⁇ m (1.41 ⁇ m). Furthermore, the profile depth P T measured between the top of a peak and the bottom of a valley is 70.18 ⁇ m (10.76 ⁇ m). Finally, the mean Rp is used to denote the mean smoothing depth, i.e. the distance between the highest point of the profile and the reference profile, for which a value of 17.71 ⁇ m (0.58 ⁇ m) was achieved. The values for conventional tools manufactured under the same conditions are given in brackets.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Scissors And Nippers (AREA)
EP93115064A 1992-11-04 1993-09-20 Tournevis Withdrawn EP0597216A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE9214998U DE9214998U1 (de) 1992-11-04 1992-11-04 Griff für Schraubwerkzeuge
DE9214998U 1992-11-04
DE4300688A DE4300688A1 (de) 1992-11-04 1993-01-13 Handbetriebenes Schraubwerkzeug
DE4300688 1993-01-13

Publications (1)

Publication Number Publication Date
EP0597216A1 true EP0597216A1 (fr) 1994-05-18

Family

ID=25922235

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93115064A Withdrawn EP0597216A1 (fr) 1992-11-04 1993-09-20 Tournevis

Country Status (1)

Country Link
EP (1) EP0597216A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2328394A (en) * 1997-08-23 1999-02-24 Liu Tasi Fa Handle for a hand tool
EP0976659A1 (fr) * 1998-07-25 2000-02-02 Meto International GmbH Etiqueteuse à main
EP1101572A1 (fr) * 1999-11-15 2001-05-23 Bobby Hu Procédé de traitement d' un outil à main
WO2006097181A1 (fr) 2005-03-18 2006-09-21 Carl Freudenberg Kg Element de manipulation pour un appareil de nettoyage

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1979460A (en) * 1932-01-29 1934-11-06 Harold S Forsberg Screw driver
US3093172A (en) * 1961-11-29 1963-06-11 Reed Edgar Anti-slip handle for manually operated tools
CH410819A (de) * 1963-10-09 1966-03-31 Reed & Prince Manufacturing Co Verfahren zur Herstellung eines Schraubenziehers
US4960430A (en) * 1987-05-13 1990-10-02 Veb Greika Greiz Weberei Und Veredlung Method for manufacturing of mat and rough, laminar, ribbon-shaped or fibrous polymeric products with a stream of particles
DE9013362U1 (de) * 1990-06-13 1991-10-10 Hans Grimberg Edelstahl GmbH, 4300 Essen Beschlag, wie Türgriff, Fenstergriff, und dgl. aus rostfreiem Edelstahl
DE9302036U1 (de) * 1993-02-15 1993-04-01 Stephan Witte GmbH & Co KG, 5800 Hagen Handgriff für ein Werkzeug

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1979460A (en) * 1932-01-29 1934-11-06 Harold S Forsberg Screw driver
US3093172A (en) * 1961-11-29 1963-06-11 Reed Edgar Anti-slip handle for manually operated tools
CH410819A (de) * 1963-10-09 1966-03-31 Reed & Prince Manufacturing Co Verfahren zur Herstellung eines Schraubenziehers
US4960430A (en) * 1987-05-13 1990-10-02 Veb Greika Greiz Weberei Und Veredlung Method for manufacturing of mat and rough, laminar, ribbon-shaped or fibrous polymeric products with a stream of particles
DE9013362U1 (de) * 1990-06-13 1991-10-10 Hans Grimberg Edelstahl GmbH, 4300 Essen Beschlag, wie Türgriff, Fenstergriff, und dgl. aus rostfreiem Edelstahl
DE9302036U1 (de) * 1993-02-15 1993-04-01 Stephan Witte GmbH & Co KG, 5800 Hagen Handgriff für ein Werkzeug

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2328394A (en) * 1997-08-23 1999-02-24 Liu Tasi Fa Handle for a hand tool
EP0976659A1 (fr) * 1998-07-25 2000-02-02 Meto International GmbH Etiqueteuse à main
EP1101572A1 (fr) * 1999-11-15 2001-05-23 Bobby Hu Procédé de traitement d' un outil à main
WO2006097181A1 (fr) 2005-03-18 2006-09-21 Carl Freudenberg Kg Element de manipulation pour un appareil de nettoyage

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