EP3302892B1 - Outil à main et procédé de fabrication dudit outil à main - Google Patents

Outil à main et procédé de fabrication dudit outil à main Download PDF

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Publication number
EP3302892B1
EP3302892B1 EP16727428.1A EP16727428A EP3302892B1 EP 3302892 B1 EP3302892 B1 EP 3302892B1 EP 16727428 A EP16727428 A EP 16727428A EP 3302892 B1 EP3302892 B1 EP 3302892B1
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EP
European Patent Office
Prior art keywords
handle
tool
handle piece
hand
contour
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.)
Active
Application number
EP16727428.1A
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German (de)
English (en)
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EP3302892A1 (fr
Inventor
Frank Rohlfs
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.)
Kirchhoff Witte GmbH
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Kirchhoff Witte GmbH
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Publication date
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Publication of EP3302892A1 publication Critical patent/EP3302892A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G3/00—Attaching handles to the implements
    • B25G3/34—Attaching handles to the implements by pressing the handle on the implements; using cement or molten metal, e.g. casting, moulding, by welding or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
    • B25B15/00—Screwdrivers
    • B25B15/02—Screwdrivers operated by rotating the handle
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G3/00—Attaching handles to the implements
    • B25G3/02—Socket, tang, or like fixings
    • B25G3/12—Locking and securing devices
    • B25G3/14—Locking and securing devices comprising barbs or teeth

Definitions

  • the invention relates to a hand tool with a tool part and with a portion of the tool part enclosing and torque-connected to this handle.
  • the invention further relates to a method for producing such a hand tool.
  • Such hand tools are, for example, screwdrivers.
  • the tool part in such a hand tool designed as a screwdriver is the blade which has a torque transmission contour on its actuation-side end.
  • the torque transmission contour can be designed differently, for example as a slot contour, as a cross contour or as any other contour which is adapted to transmit a torque to a corresponding counter-contour having screw.
  • the operating end of the blade with its torque transmission contour opposite end is flattened spatula-like. This end is used for the torque-locking connection of a handle.
  • a handle is typically a plastic part. This is molded around the spatula-like flattened end portion of the blade in a plastic molding tool.
  • the handle itself is made of two different plastic components, wherein the difference in the two plastic components may be due to a different color and / or by a different hardness. Different colors are used to give the handle of such a hand tool in its outer surface a specific design. Different hardnesses are used to create a certain feel when gripped and when using the handle. If different plastics are used for the formation of such a handle, with usually only two different plastics being used, this takes place by way of a so-called two-component injection molding process. This means that in a first step to create the handle, the plastic tool geometry is set to the geometry of the first plastic component. Then the tool geometry is changed, so that in the same tool in a second step, the second plastic component can be urgeformt.
  • the second plastic component fills the remaining cavities in the mold cavity.
  • first plastic component is superficially exposed. This is typically a plastic of higher hardness, while the second plastic component is a so-called soft component.
  • the manufacturing process for producing a hand tool with a thus created handle made of two plastic components is due to the necessary tool conversion for retooling the tool from the geometry required for the Urformung the first plastic component geometry of the cavity in the geometry of the cavity, which is required for prototyping the second plastic component also time consuming. Correspondingly long are the cycle times to be realized with such a method. If a change in shape or design is made with respect to the handle, this means that new tools must be produced.
  • EP 2 407 280 A1 discloses a hand tool with a tool part and with a portion of the tool part enclosing and torque-locking connected to this handle.
  • the tool part has, in regions in a section enclosed by the handle, a connection contour serving for the torque-locking connection of the handle.
  • the handle comprises a connectable to the terminal contour and this torque-locking enclosing inner handle and an outer handle made of plastic.
  • the invention is therefore the object of proposing a hand tool with a multi-component handle and a method for producing such a hand tool that can be produced not only in shorter cycle times, but in the one not insignificantly reduced effort shape and / or design changes in the interpretation of the handle can be made.
  • the device-related object is achieved according to the invention by a hand tool of the type mentioned, in which the tool part at least partially in a bordered by the handle portion serving for torque-locking connection of the handle terminal contour and wherein the handle is a connectable to the terminal contour and this torque-locking bordering inner gripping piece, wherein one or more, outwardly open Vergusskanäle are provided with slid on the terminal contour inner handle between two parts, and an outer handle made of plastic, in the way of Kunststoffurformreaes to the unit of tool part with connected to its connection contour inner Molded handle and the at least one casting channel is at least partially filled with the outer handle forming plastic material.
  • the method-related object is achieved by a method having the features of claim 14.
  • the inner handle forms the coupling piece between the tool part with its connection contour and the outer handle.
  • This inner handle which is typically in one piece, but can easily consist of several individual parts, can be connected to the terminal contour of the tool part.
  • the inner handle on the connection contour in the longitudinal axial direction of the tool part can be pushed onto this.
  • the inner handle, if designed in several parts is composed of two shells which, when assembled, surround the connection contour of the tool part in a torque-locking manner.
  • the connectability of the inner handle to the connection contour of the tool part requires that the inner handle is not molded around the terminal contour of the tool part, but made independently of the connection contour is.
  • the inner handle is a plastic part.
  • inner grips made of other materials can be used. Inner grips made of plastic will usually prefer due to the cost-effective production and greater variability in the material used, especially in the training of different geometries.
  • connection contour of the tool part is designed so that the inner handle is torque-tight connected thereto.
  • the connection contour is a plastic body encapsulated around a section of the tool part, for example the screwdriver blade, designed as a polygon, so that the inner grip element can be connected in a torque-locking manner to the connection contour with an inner complementary polygonal contour.
  • the two polygonal contours are adapted to each other in such a way that a torque transmission from the inner handle is given to the connection contour. This does not have the necessary condition that the inner connection contour of the inner handle and the polygonal contour of the connector must have the same geometry.
  • Such a polygonal contour may be formed, for example, as a hexagon. This contour extends in the longitudinal extension of the tool part.
  • the inner contour of the handle and / or the outer contour of the connection contour are coordinated with each other so that one or more Vergusskanäle remain free between them.
  • the potting channels are used to connect the inner handle with the connection contour of the tool part, so that both parts are permanently connected to each other. Ultimately, these two parts can then no longer be separated from each other without destroying each other.
  • the potting channels are potted with a compound intended for the compound.
  • the handle of this hand tool has in addition to the inner handle on an outer handle, which is a plastic part and which is urgeformt to the inner handle.
  • This process is performed after the inner handle is connected to the terminal contour.
  • the outer handle of the outside or the outside open Vergusskanäle be filled, so that in the prototypes of the outer handle at the same time the inner Handle is connected to the connection contour of the tool part. Therefore, in principle for the connection of the inner handle to the terminal contour no separate manufacturing step and not the use of another material is needed.
  • the patch on the contour of the tool part inner handle which thus addressed in this process as a lost inner Kunststoffurformwerkmaschinegne.
  • the terminal contour and the outer handle are manufactured in a plastic injection molding tool in successive steps. Due to the relatively simple geometries to be formed, this can be a so-called open-close tool, ie a tool which basically works without a slide or the like.
  • the inner handle produced in a separate tool typically produced in a separate plastic injection molding tool, however, may also have a complicated surface geometry, as well as apertures, channels, undercuts or the like. Due to the production of the inner handle in a separate plastic injection molding tool, the on-off tool otherwise used for production can be driven at a higher clock frequency. In this tool, the semi-finished products comprising the tool part and placed on the connection contour of the tool part inner handle are inserted.
  • one and the same master mold can be used to form the outer handle to also in terms of their diameter to mold different tool parts therein.
  • the connection contour of the tool part under some circumstances it may be necessary to use different inner grips for different diameters of the tool parts.
  • the inner handle which then represents the inner handle surface for the outer handle, without having to make changes to the open-end tool
  • the inner handle which then represents the inner handle surface for the outer handle
  • the cavities remaining in the mold cavity are filled with the plastic material used to create the outer handle, including the already mentioned casting channels.
  • the design of the tool handle can be varied. Such a variation is possible, for example, with regard to the geometry of surface portions of the inner handle, which also represent a portion of its outer surface in the finished tool handle.
  • the inner handle preferably has a greater hardness (Shore) than the outer handle. In this way, such a handle can be equipped with a special grip. In another embodiment, it is provided that the inner handle has a lower hardness than the outer handle. In such an embodiment, the inner handle acts like a pillow that conforms to the hand of a person using the handle. In such an embodiment, the inner handle is typically generally enclosed by the outer handle, which is also compliant enough for the yielding cushion effect of the inner handle to take effect can. Nevertheless, on the harder outer and with respect to the softer inner handle a shell forming outer handle high torque can be introduced into the handle and thus in the tool.
  • the inner handle is pushed onto the connection contour of the tool part, in a translatory Aufschiebeddling in the longitudinal extent of the tool part.
  • the inner handle is fixed on the connection contour by a detent.
  • the connecting contour carries two diametrically opposite, arranged on the outside latches, which are elastically adjustable in the radial direction.
  • the inner handle carries at a respective location in each case a latching recess, in each of which a catch engages when the inner handle is in its intended position on the connection contour. The remaining between the terminal contour and the inner handle game and the actual connection between these two parts is done by the later filling the potting channels provided.
  • this handle concept is especially suitable for the fact that in some areas the outer surface of the inner handle also represents the surface of the tool handle.
  • these surface areas which are not to be coated by the further plastic component for creating the outer handle, it is provided in a preferred embodiment that these areas of the inner handle are limited by a circumferential sealing lip.
  • This sealing lip acts against the inner wall of the cavity for molding the outer handle and lies under a certain bias on the inner wall of the plastic forming tool.
  • Such a sealing lip can be provided by a corresponding material thinning of the inner grip.
  • the outer surface of the handle is provided by parts of the inner handle, it may be provided that these areas have a special design and / or geometry.
  • a tool handle is provided as a screwdriver handle that a plurality of circumferentially distributed outside arranged rotational drive bead are arranged in those areas of the inner handle, which form the outer surface of the screwdriver handle.
  • Such a configuration is not limited to the described embodiment of this tool handle as a screwdriver handle, but can also be used in other tool handles. At least some of these rotational drive beads are at least partially inclined relative to the handle longitudinal axis in its extension in the direction of the blade of the screwdriver handle against the screwing.
  • rotational driving beads on their side facing away from the screwing-in direction at a low angle with respect to the envelope surface enveloping the handle inclined footprint.
  • rotational driving beads are present, which are inclined with their longitudinal extent relative to the longitudinal extent of the handle and thus, in contrast to Drehit Vietnamesesicken from the prior art are not parallel to the longitudinal extent of the handle.
  • the inclination of the longitudinal extension of these rotational drive beads is directed against the screwing when viewed from its rear end towards the blade.
  • These rotational driving beads have at their side facing the direction of screwing a footprint, which is inclined at a slight angle to the lateral surface of the handle or the handle enveloping the lateral surface.
  • Such a conceived rotational drive bead ensures in addition to an introduction of torque in the screwdriver handle for screwing a screw due to the inclined design of such a rotary driving bead with respect to the longitudinal extent of the screwdriver handle at the same time also providing a force acting in the longitudinal axial direction of the screwdriver handle in the direction of the torque transmission contour of the blade moment. This moment serves to maintain engagement of the blade of the screwdriver with the rotary driving contour of the screw head when torque is applied.
  • a portion of the torque introduced is used for the required engagement torque. In this respect, it is not absolutely necessary in such a screwdriver handle to spend an additional pressing force. For particularly stiff screws, this may also be useful.
  • this provided for the engagement position torque is coupled to the coupled torque. This means that with a high applied torque, the moment to be maintained between the blade and the screw is correspondingly higher. Thus, only by the special screwdriver grip design care is taken that even with a high applied torque on the screwdriver handle, the blade is not levered out of the rotary driving contour of the screw.
  • the footprint provided counter to the screwing-in direction is inclined at only a slight angle relative to the lateral surface of the handle or the lateral surface enveloping the handle. This prevents that in case of possible slippage between the hand of a person using the screwdriver and the screwdriver handle skin of the palm is clamped.
  • inclined rotational driving beads can be provided in addition to already existing rotary driving beads, which follow with respect to their longitudinal extent of the longitudinal extension of the screwdriver handle. Likewise, it is possible that the screwdriver handle has only in the aforementioned manner inclined rotational driving beads.
  • rotational driving beads are curved with respect to their longitudinal extent, wherein the angle between the respective portion of the rotary driving bead and the handle longitudinal axis increases in the direction of the blade.
  • a particularly preferred embodiment of such a screwdriver handle is seen in that the screwdriver handle has a circumferentially roundish surface, in particular a cross-sectional geometry in which a plurality, typically three cycloidal arc sections are provided, which are interconnected by sections having a significantly smaller radius of curvature.
  • the rotational driving beads worked out by introduced into the outer surface depressions, in the field of Zykloidbögen.
  • the lateral surface enveloping the tool handle is preferably not changed in terms of its geometry, so that the rotational driving beads are no ribs, beads or the like projecting beyond the jacket surface otherwise used in such a handle.
  • a recess is typically made V-shaped, wherein the opening width of the flanks is relatively large and typically exceeds an angle of 160 °. This implies that the depth of the recesses for working out the setting bevel for the rotational driving beads need not be particularly deep in order to provide a sufficiently large footprint. It is considered sufficient if the maximum depth of such recess for forming such a footprint is 0.5 mm is.
  • the footprint Due to the low inclination of the footprint this is despite the small depth of the footprint working out recess sufficiently large, ie the footprint has a sufficient extent from the depth line of the recess to the upper end of the rotary driving bead to one of an applied torque the desired acting in the longitudinal direction Derive moment.
  • the extent of that footprint of the rotary driving bead, which points against the screwing, from its pointing to the rear end of the screwdriver handle end to its other end in the extension of the depth line of this footprint forming depression to the upper Conclusion gradually increases. This is the largest height of the footprint of the rotary driving bead, especially when the longitudinal axis of the rotary driving bead is curved in the manner described above, in that portion in which the torque derived from the coupled torque in the longitudinal axial direction is greatest.
  • a screwdriver 1 as a hand tool comprises a tool part 2 and a handle 3.
  • the tool part 2 is the blade of the screwdriver 1, which carries a rotational drive contour 4 at its free end.
  • the rotary driving contour 4 is designed as a cross contour, so that with the screwdriver 1, a cross-slot screw can be operated.
  • the handle 3 of the screwdriver 1 is composed of several components.
  • the Handle 3 of two components namely an inner handle 5 and an outer handle 6. Since the inner handle 5 is in the illustrated embodiment, in part, the outer surface of the handle 3 of the screwdriver 1, this component is in FIG. 1 visible, noticeable.
  • the inner handle 5 is made in the illustrated embodiment of a plastic harder to Shore than the outer handle. 6
  • FIG. 2 shows the tool part 2 of the screwdriver 1.
  • the rotary drive 4 opposite end portion of the tool part 2 is equipped with a connection contour 7.
  • the connection contour 7 is encapsulated around the relevant end of the tool part 2, which is flattened spatula-shaped for this purpose.
  • the connection contour 7 is designed as a polygon, which is designed so that at this the inner handle 5 can be connected torque-locking.
  • the connection contour 7 comprises a plurality of the longitudinal extent of the tool part 2 following ribs.
  • the detents 8 are made of the same plastic material as the remaining components of the connection contour 7.
  • the perspective view of the rear side of the connection contour 7 in FIG FIG. 3 clearly shows the cross-sectional geometry of the connection contour 7.
  • connection contour 7 is a polygonal contour enclosing the individual ribs, which is shown in dash-dot lines in this figure to emphasize the geometry.
  • the virtually enveloping the connecting contour 7 lateral surface is designed as a regular six-corner.
  • the ribs 8 carrying ribs 9 each have a flat side to carry the notches 8.
  • From the hexagonal surface 10 of the connection contour 7 springing back the longitudinal extent of the connection contour 7 Vergusskanäle 11 are provided, of which only some in FIG. 3 indicated by this reference numeral.
  • the potting channels 11 are located between the ribs. The potting channels 11 are open at the end, even if the inner handle 5 is pushed onto the connection contour 7.
  • connection contour 7 ends in the direction of the rotational engagement contour 4 of the tool part 2 in a plate 12.
  • the tool part 2 ultimately comprises the blade made of a tool part with the rotary driving contour 4 and the urgeformte connecting contour 7th
  • FIG. 5 shows in a perspective somewhat distorted representation of an insight into the terminal contour 7 complementary formed as a sleeve rotational drive contour 12 of the inner handle 5. This is how out FIG. 5 clearly recognizable, also hexagonal.
  • openings 14 are introduced at the corresponding positions of the notches 8 (see also FIG. 4 ). In this snap the notches 8, when the inner handle 5 is pushed far enough on the connection contour 7. This is the case when the front end face of the inner handle 5 bears against the side of the plate 12 facing the connection contour 7.
  • parts of the outer surface of the inner handle 5 at the same time form the outer surface of the handle 3 of the screwdriver 1.
  • the relevant sections of the inner handle 5 form a certain fields on the outside of the handle 3.
  • the fields of the inner handle which form these fields of the handle 3 are separated from one another so that the outer handle can be formed between these fields.
  • the recesses located in the inner handle 5 are filled with a plastic compound with respect to the outside of the areas forming the fields.
  • the fields forming the fields are, as seen from the view on the back of the inner handle 5 of FIG. 6 seen, designed as a hollow body.
  • the hollow body recognizable in this figure is provided with apertures to represent the word "WITTE" and a logo. These openings are also filled in the subsequent step of forming the outer handle 6 with the relevant plastic compound. Because these differs in color from the color of the inner handle 5, the lettering and the logo appear clearly.
  • FIG. 4a shows in an enlarged view an edge formation in the transition from a surface of the handle 3 forming surface portion of the inner handle 5 to an adjacent region which is covered by the outer handle 6.
  • the sealing lip 16 is located at the boundary between these two areas.
  • the sealing lip 16 is a thin material extension which extends over the surface 15 by a few tenths of a millimeter.
  • the sealing lip 16 acts in the preparation of the outer handle 6 against the inner wall of the mold cavity in which the outer handle 6 is urgeformt.
  • FIG. 6 Part of the inner handle 5 is as out FIG. 6 can be seen, also a symbol 17, through which the nature of the rotary driving contour 4 is symbolized. Since the rotational engagement contour 4 is a cross contour, the symbol 17 is also executed as a cross.
  • outer surface of the symbolism 17 is not over-molded by the plastic compound used to create the outer handle 6.
  • the outer surface of the symbol 17 is also equipped with a circumferential sealing lip, as previously described at the radially facing surface portions of the inner handle 5, equipped.
  • the tool part 2 is inserted with the pushed onto its connection contour 7 inner handle 5 in a Kunststoffurformwerkmaschinemaschine. Since circumferentially distributed at the same angular distance to each other in the illustrated embodiment, three surface portions 15 of the inner handle 5 are provided circumferentially, which are not to be coated by the plastic material to form the outer handle 6 and these three radially outwardly facing surface regions 15 are each bounded by a circumferential sealing lip 16, they act against the inner wall of the mold cavity, under a certain bias. As a result, the arrangement of the inner handle 5 is centered with the attached tool part 2 within the mold cavity. Additional centering measures are therefore generally not required in such an embodiment.
  • the plastic compound for forming the outer handle 6 is also used to connect the inner handle 5 with the connection contour 7 of the tool part 2.
  • an insulation is provided to the connection contour of the tool part, extending to the rotary driving contour of the same.
  • the formed by the inner handle 5 and in FIG. 1 recognizable and in FIG. 7 Surface area 15 shown enlarged carries a rotational driving bead 18, the longitudinal extent, indicated by the words "WITTE", inclined to the longitudinal axis of the handle 3 extends.
  • the inclination takes place in a direction in which the end facing the tool part 2 is inclined counter to the screwing-in direction (turning to the right).
  • the longitudinal axis L is in FIG. 7 dash-dotted lines in the handle 3 of the drawn.
  • the rotary driving bead 18 in the illustrated embodiment is created by a first recess 19 and a second recess 20, introduced into the outer circumferential surface of the screwdriver handle 3.
  • the outer flat side 21 of the rotary driving bead 18 corresponds in its course to the outer enveloping lateral surface of the handle 3.
  • the rotary driving bead 18 in the illustrated embodiment does not protrude beyond the usual lateral surface of the handle 3.
  • the handle 3 is barrel-shaped.
  • the rotary driving bead 18 is located in the region of the largest bulge this barrel shape.
  • the lateral surface of the handle 3 in the region of the rotary driving bead 18 comprises in the circumferential direction three cycloidal arcs with a larger radius of curvature, which are each connected by a section with a smaller radius of curvature.
  • the crests with the smaller radii of curvature are provided by the outer handle 6.
  • a counter to the direction of screw-facing footprint 23 is provided. If a torque is exerted on the handle 3 by a hand which surrounds the handle 3, a part of the torque acting on it is brought into a direction directed towards the rotational engagement contour 4 due to the orientation of the positioning surface 23 inclined relative to the longitudinal axis L.
  • the depth line 24 of the recess 19 merges to both ends in the adjacent grip surface. This has the consequence that the footprint 23 successively increases from its pointing away from the tool part 2 end to its other end.
  • the depression 19 itself is V-shaped in its cross-sectional geometry, as shown schematically in FIG FIG. 3 is shown. The opening angle of the flanks of the recess 19 is slightly more than 160 °.
  • the torque bead 18 is limited in the screwing through the recess 20. Through the recess 20, a second footprint 25 is formed, which points opposite to the screwing.
  • a torque on the handle 3 by the hand of a user is thus transmitted through the recesses 19, 20 and the shelves 23, 25 formed thereby not only a rotational movement on the handle 3, including the previously described longitudinal axial rotational driving beads serve, but about Both shelves 23, 25, a proportion of the introduced torque in the longitudinal axial direction to the rotary driving contour 4 is derived through which moment the screwdriver 1 follows the successive feed of a screw actuated quasi automatically, at least as long as a torque is applied.

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  • Mechanical Engineering (AREA)
  • Details Of Spanners, Wrenches, And Screw Drivers And Accessories (AREA)

Claims (15)

  1. Outil à main comportant un élément d'outil (2) et une poignée (3) enfermant une partie de l'élément d'outil (2) et reliée solidairement en rotation à celui-ci, caractérisé en ce que
    - l'élément d'outil (2) présente au moins partiellement dans une partie enfermée par la poignée (3) un contour de raccordement (7) servant à raccorder solidairement en rotation la poignée (3), et
    - la poignée (3) comporte une pièce de poignée intérieure (5) pouvant être raccordée au contour de raccordement (7) et enfermant celui-ci solidairement en rotation, au moins un canal de remplissage (11) ouvert vers l'extérieur étant prévu entre les deux éléments (5, 7) lorsque la pièce de poignée intérieure (5) est poussée sur le contour de raccordement (7), et une pièce de poignée extérieure (6) en matière plastique qui est formée autour de l'unité constituée de l'élément d'outil (2) pourvu d'une pièce de poignée intérieure (5) raccordée à son contour de raccordement (7) au cours d'un processus de moulage de matière plastique et l'au moins un canal de remplissage (11) est rempli au moins partiellement de la matière plastique formant la pièce de poignée extérieure (6).
  2. Outil à main selon la revendication 1, caractérisé en ce que la pièce de poignée intérieure (5) est un élément en plastique fabriqué dans un outil séparé par rapport à la réalisation du contour de raccordement (7) et de la pièce de poignée extérieure (6).
  3. Outil à main selon la revendication 1 ou 2, caractérisé en ce que le contour de raccordement (7) est un élément en matière plastique moulé autour d'une partie de l'élément d'outil (2).
  4. Outil à main selon l'une des revendications 1 à 3, caractérisé en ce que le contour de raccordement (7) est réalisé en vue en coupe transversale sous la forme d'un contour quadrangulaire pourvu de zones saillantes de la surface d'enveloppe (10) enveloppant virtuellement le contour de raccordement (7), la pièce de poignée intérieure (5) ne s'engageant pas, ou que partiellement, dans les zones saillantes en vue en coupe transversale et les parties restantes formant chacune un canal de remplissage (11).
  5. Outil à main selon l'une des revendications 1 à 4, caractérisé en ce que la pièce de poignée intérieure (5) est fixée sur le contour de raccordement (7) au moyen d'un dispositif d'encliquetage (8, 14).
  6. Outil à main selon la revendication 5, caractérisé en ce que le contour de raccordement (7) porte sur son côté extérieur au moins un élément d'encliquetage (8) qui, lorsqu'une pièce de poignée intérieure (5) est poussée sur le contour de raccordement (7), s'engage dans un évidement d'encliquetage (14) de la pièce de poignée intérieure (5).
  7. Outil à main selon l'une des revendications 1 à 6, caractérisé en ce qu'au moins une partie de surface extérieure (15) de la pièce de poignée intérieure (5) constitue en même temps une zone de la surface extérieure de la poignée (3) de l'outil à main (1).
  8. Outil à main selon la revendication 7, caractérisé en ce que le bord d'une zone de la pièce de poignée intérieure (5) délimitant la surface extérieure (15) de la poignée (3), est formé par une lèvre d'étanchéité (16) qui prend appui sur la cavité intérieure de l'outil de moulage primitif lors du processus de moulage primitif de matière plastique pour réaliser la pièce de poignée extérieure (6).
  9. Outil à main selon la revendication 7 ou 8, caractérisé en ce qu'au moins une partie de surface (15) de la poignée intérieure (5), formant la surface extérieure de la poignée (3), est pourvue d'un revêtement souple.
  10. Outil à main selon l'une des revendications 7 à 9, caractérisé en ce qu'au moins une partie de surface (15) de la pièce de poignée intérieure (5), formant la surface extérieure de la poignée (3), comporte au moins un passage rempli de la matière de la pièce de poignée extérieure (6).
  11. Outil à main selon la revendication 10, caractérisé en ce que le passage ou les passages sont réalisés sous la forme de lettrage et/ou de logo.
  12. Outil à main selon l'une des revendications 1 à 11, caractérisé en ce que l'outil à main est un tournevis (1).
  13. Outil à main selon la revendication 12, caractérisé en ce que la poignée (3) du tournevis porte plusieurs moulures d'entraînement en rotation (18) réparties circonférentiellement à l'extérieur, au moins une partie des moulures d'entraînement en rotation (18) étant inclinées au moins par endroits par rapport à l'axe longitudinal (L) de la poignée dans leur extension en direction de la queue (2) du tournevis (1) à l'opposé du sens de vissage et ces moulures d'entraînement en rotation (18) comportant sur leur côté opposé au sens de vissage une surface de commande (23) inclinée avec un angle faible par rapport à la surface d'enveloppe enveloppant la poignée (3).
  14. Procédé de fabrication d'un outil à main pourvu d'une poignée d'outil (3) raccordée à un élément d'outil (2), le procédé comprenant les étapes suivantes :
    - fournir un élément d'outil (2),
    - effectuer un moulage primaire d'un contour de raccordement (7) en matière plastique comportant un contour d'entraînement en rotation côté extérieur (12) et des canaux de remplissage (11) ouverts vers l'extérieur autour d'une partie de l'élément d'outil (2),
    - fournir une pièce de poignée intérieure (5) enfermant le contour de raccordement (7) solidairement en rotation et raccordé celle-ci au contour de raccordement (7), et
    - effectuer un moulage primaire d'une pièce de poignée extérieure (6) en matière plastique sur la pièce de poignée intérieure (5), se trouvant dans le premier outil de moulage primaire et raccordée au contour de raccordement (7), dans un outil de moulage primaire, processus de moulage primaire dans lequel des espaces creux entre la pièce de poignée intérieure (5) et le contour de raccordement (7), comme par exemple les canaux de remplissage (11), sont également remplis au moins partiellement avec la matière plastique prévue pour former la pièce de poignée extérieure (6) et donc la pièce de poignée intérieure (5) est reliée au contour de raccordement (7).
  15. Procédé selon la revendication 14, caractérisé en ce que le contour de raccordement (7) et la pièce de poignée extérieure (6) sont réalisées dans un outil progressif de moulage primaire de matière plastique dans des étapes successives, tandis que la pièce de poignée intérieure (5) est fabriquée dans un outil de moulage primaire séparé et est raccordée au contour de raccordement (7), obtenu par moulage primaire et durci, avant l'étape de moulage primaire de la pièce de poignée extérieure (6).
EP16727428.1A 2015-06-01 2016-05-31 Outil à main et procédé de fabrication dudit outil à main Active EP3302892B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202015102811.3U DE202015102811U1 (de) 2015-06-01 2015-06-01 Handwerkzeug
PCT/EP2016/062280 WO2016193266A1 (fr) 2015-06-01 2016-05-31 Outil à main et procédé de fabrication dudit outil à main

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EP3302892A1 EP3302892A1 (fr) 2018-04-11
EP3302892B1 true EP3302892B1 (fr) 2018-09-26

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US (1) US10857662B2 (fr)
EP (1) EP3302892B1 (fr)
DE (1) DE202015102811U1 (fr)
ES (1) ES2702557T3 (fr)
WO (1) WO2016193266A1 (fr)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11260520B2 (en) * 2017-03-17 2022-03-01 United States Pumice Company Pumice device and handle

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5390572A (en) * 1993-07-27 1995-02-21 Vermont American Corporation Tool with immproved impact and torque capabilities and having ergonomic handle
DE19606366C1 (de) 1996-02-21 1997-07-17 Hahn Willi Gmbh Schraubwerkzeug
US6655240B1 (en) 1997-06-02 2003-12-02 Snap-On Tools Company Insulating driver with injection molded shank and fluted working tip
US20050115023A1 (en) * 2003-12-01 2005-06-02 Jack Lin Tricolored handle structure for screwdriver
DE102005037504B3 (de) * 2004-12-23 2006-08-24 Felo-Werkzeugfabrik Holland-Letz Gmbh Verwendung eines Handgriffes für einen Schraubendreher
DE102006061068A1 (de) * 2006-03-03 2007-09-06 Felo-Werkzeugfabrik Holland-Letz Gmbh Verfahren zur Herstellung eines Griffes
US20070290399A1 (en) * 2006-06-20 2007-12-20 Bradshaw Medical, Inc. Handle and method of making thereof
US8641955B2 (en) * 2008-08-08 2014-02-04 Gauthier Biomedical Inc. Method for forming a molded component for an item
JP4440327B1 (ja) 2009-03-13 2010-03-24 株式会社ベッセル工業 グリップ、工具及びグリップの製造方法

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US10857662B2 (en) 2020-12-08
EP3302892A1 (fr) 2018-04-11
ES2702557T3 (es) 2019-03-01
WO2016193266A1 (fr) 2016-12-08
DE202015102811U1 (de) 2016-09-06
US20180290287A1 (en) 2018-10-11

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