EP3302892B1 - Hand-held tool and method for producing such a hand-held tool - Google Patents
Hand-held tool and method for producing such a hand-held tool Download PDFInfo
- 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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- 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.)
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- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 239000004033 plastic Substances 0.000 claims description 54
- 229920003023 plastic Polymers 0.000 claims description 54
- 239000000463 material Substances 0.000 claims description 15
- 238000000465 moulding Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 12
- 238000005266 casting Methods 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 2
- 238000000576 coating method Methods 0.000 claims description 2
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- 238000013461 design Methods 0.000 description 15
- 150000001875 compounds Chemical class 0.000 description 9
- 230000005540 biological transmission Effects 0.000 description 5
- 235000019589 hardness Nutrition 0.000 description 5
- 238000004382 potting Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000001746 injection moulding Methods 0.000 description 4
- 230000000295 complement effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000011265 semifinished product Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
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Images
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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Description
Die Erfindung betrifft ein Handwerkzeug mit einem Werkzeugteil und mit einem einen Abschnitt des Werkzeugteils einfassenden und drehmomentschlüssig an diesen angeschlossenen Griff. Die Erfindung betrifft ferner ein Verfahren zum Herstellen eines solchen Handwerkzeuges.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.
Bei derartigen Handwerkzeugen handelt es sich beispielsweise um Schraubendreher. Das Werkzeugteil bei einem solchen als Schraubendreher konzipierten Handwerkzeug ist die Klinge, die an ihrem betätigungsseitigen Ende eine Drehmomentübertragungskontur aufweist. Die Drehmomentübertragungskontur kann unterschiedlich ausgebildet sein, beispielsweise als Schlitzkontur, als Kreuzkontur oder als jede andere Kontur, die angepasst ist, ein Drehmoment auf eine eine entsprechende Gegenkontur aufweisende Schraube zu übertragen. Das dem betätigungsseitigen Ende der Klinge mit seiner Drehmomentübertragungskontur gegenüberliegende Ende ist spatelartig abgeplattet. Dieses Ende dient zum drehmomentschlüssigen Anschließen eines Griffes. Bei einem solchen Griff handelt es sich typischerweise um ein Kunststoffteil. Dieser wird um den spatelartig abgeplatteten Endabschnitt der Klinge in einem Kunststoffurformwerkzeug geformt. Dabei kann vorgesehen sein, dass der Griff selbst aus zwei unterschiedlichen Kunststoffkomponenten hergestellt wird, wobei der Unterschied in den beiden Kunststoffkomponenten durch eine unterschiedliche Farbgebung und/oder durch eine unterschiedliche Härte bedingt sein kann. Unterschiedliche Farben werden eingesetzt, um dem Griff eines solchen Handwerkzeuges in seiner Mantelfläche ein bestimmtes Design zu verleihen. Unterschiedliche Härten werden eingesetzt, um eine bestimmte Haptik beim Ergreifen und bei einer Benutzung des Griffes zu erzeugen. Werden unterschiedliche Kunststoffe für die Ausbildung eines solchen Griffes eingesetzt, wobei in aller Regel nur zwei unterschiedliche Kunststoffe verwendet werden, erfolgt dieses im Wege eines so genannten Zweikomponenten-Spritzgussverfahrens. Dieses bedeutet, dass in einem ersten Schritt zum Erstellen des Griffes die Kunststoffurformwerkzeuggeometrie auf die Geometrie der ersten Kunststoffkomponente eingerichtet wird. Anschließend wird die Werkzeuggeometrie geändert, damit in demselben Werkzeug in einem zweiten Schritt die zweite Kunststoffkomponente urgeformt werden kann. Ebenfalls ist ein Umlegen des Schraubendrehergriffhalbzeuges in eine andere Werkzeugform möglich. Die zweite Kunststoffkomponente füllt die verbleibenden Hohlräume in der Werkzeugkavität. Bei der Erstellung eines Handwerkzeuggriffes mit mehreren Kunststoffkomponenten ist in aller Regel vorgesehen, dass zumindest bereichsweise die erste Kunststoffkomponente oberflächlich frei liegt. Bei dieser handelt es sich typischerweise um einen Kunststoff höherer Härte, während es sich bei der zweiten Kunststoffkomponente um eine so genannte Weichkomponente handelt.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. Such 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. It can be provided that 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. It is also possible to move the screwdriver grip semi-finished product into another tool shape. The second plastic component fills the remaining cavities in the mold cavity. When creating a hand tool handle with a plurality of plastic components is usually provided that at least partially the 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.
Der Herstellungsprozess zum Herstellen eines Handwerkzeuges mit einem solchermaßen erstellten Griff aus zwei Kunststoffkomponenten ist aufgrund der notwendigen Werkzeugumrüstung zum Umrüsten des Werkzeuges von der für die Urformung der ersten Kunststoffkomponente benötigten Geometrie der Kavität in die Geometrie der Kavität, die zum Urformen der zweiten Kunststoffkomponente benötigt wird, auch zeitaufwendig. Entsprechend lang sind die mit einem solchen Verfahren zu realisierenden Taktzeiten. Soll eine Form- oder Designänderung hinsichtlich des Griffes vorgenommen werden, hat dies zur Folge, dass neue Werkzeuge hergestellt werden müssen.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.
Vor dem Hintergrund dieses diskutierten Standes der Technik liegt der Erfindung daher die Aufgabe zugrunde, ein Handwerkzeug mit einem aus mehreren Komponenten bestehenden Griff sowie ein Verfahren zum Herstellen eines solchen Handwerkzeuges vorzuschlagen, der sich nicht nur in kürzeren Taktzeiten herstellen lässt, sondern bei dem mit einem nicht unerheblich reduzierten Aufwand Form- und/oder Designänderungen in der Auslegung des Griffes vorgenommen werden können.Against the background of this discussed prior art, 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.
Gelöst wird die vorrichtungsbezogene Aufgabe erfindungsgemäß durch ein Handwerkzeug der eingangs genannten Art, bei dem das Werkzeugteil zumindest bereichsweise in einem von dem Griff eingefassten Abschnitt eine zum drehmomentschlüssigen Anschließen des Griffes dienende Anschlusskontur aufweist und bei dem der Griff ein an die Anschlusskontur anschließbares und diese drehmomentschlüssig einfassendes inneres Griffstück, wobei bei auf die Anschlusskontur aufgeschobenem innerem Griffstück zwischen beiden Teilen ein oder mehrere, nach außen hin offene Vergusskanäle vorgesehen sind, sowie ein äußeres Griffstück aus Kunststoff aufweist, das im Wege eines Kunststoffurformprozesses um die Einheit aus Werkzeugteil mit an seine Anschlusskontur angeschlossenem innerem Griffstück geformt und der wenigstens eine Vergusskanal zumindest teilweise mit dem das äußere Griffstück bildenden Kunststoffmaterial verfüllt ist.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 Kunststoffurformprozesses 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.
Gelöst wird die verfahrensbezogene Aufgabe durch ein Verfahren mit den Merkmalen des Anspruchs 14.The method-related object is achieved by a method having the features of
Bei der Konzeption des Griffes dieses Handwerkzeuges steht die Gestaltung und Auslegung des inneren Griffstückes im Vordergrund. Dieses spiegelt sich sowohl in dem beanspruchten Handwerkzeug als auch in dem beanspruchten Verfahren wieder. Das innere Griffstück bildet das Kupplungsstück zwischen dem Werkzeugteil mit seiner Anschlusskontur und dem äußeren Griffstück. Dieses innere Griffstück, welches typischerweise einstückig ist, jedoch ohne weiteres auch aus mehreren Einzelteilen bestehen kann, ist an die Anschlusskontur des Werkzeugteils anschließbar. In einer bevorzugten Ausgestaltung ist das innere Griffstück auf die Anschlusskontur in längsaxialer Richtung des Werkzeugteils auf diese aufschiebbar. Gleichermaßen sind auch Ausgestaltungen möglich, bei denen das innere Griffstück, wenn mehrteilig ausgebildet, aus zwei Schalen zusammengesetzt ist, die, wenn zusammengesetzt, die Anschlusskontur des Werkzeugteils drehmomentschlüssig einfassen. Die Anschließbarkeit des inneren Griffstückes an die Anschlusskontur des Werkzeugteils bedingt, dass das innere Griffstück nicht um die Anschlusskontur des Werkzeugteils umspritzt, sondern unabhängig von der Anschlusskontur hergestellt ist. Vorzugsweise handelt es sich bei dem inneren Griffstück um ein Kunststoffteil. Gleichermaßen sind auch innere Griffstücke aus anderen Materialien einsetzbar. Innere Griffstücke aus Kunststoff wird man in aller Regel aufgrund der kostengünstigen Herstellung und der größeren Variabilität in dem eingesetzten Material, vor allem auch in der Ausbildung unterschiedlichster Geometrien bevorzugen.When designing the handle of this hand tool, the design and design of the inner handle is in the foreground. This is reflected both in the claimed hand tool and in the claimed method. 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. In a preferred embodiment, the inner handle on the connection contour in the longitudinal axial direction of the tool part can be pushed onto this. Equally, embodiments are also possible in which 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. Preferably, the inner handle is a plastic part. Similarly, 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.
Die Anschlusskontur des Werkzeugteils ist ausgelegt, damit das innere Griffstück drehmomentschlüssig daran anschließbar ist. Vorzugsweise ist die Anschlusskontur ein um einen Abschnitt des Werkzeugteils, beispielsweise der Schraubendreherklinge umspritzter Kunststoffkörper, ausgebildet als Vielkant, damit das innere Griffstück mit einer inneren komplementären Vielkantkontur drehmomentschlüssig an die Anschlusskontur angeschlossen werden kann. Die beiden Vielkantkonturen sind dergestalt zueinander angepasst, dass eine Drehmomentübertragung von dem inneren Griffstück auf die Anschlusskontur gegeben ist. Dieses hat nicht zur notwendigen Voraussetzung, dass die innere Anschlusskontur des inneren Griffstückes und die Vielkantkontur des Anschlussstückes dieselbe Geometrie aufweisen müssen. Eine solche Vielkantkontur kann beispielsweise als Sechskant ausgebildet sein. Diese Kontur erstreckt sich in Längserstreckung des Werkzeugteils. Dabei ist vorgesehen, dass die Innenkontur des Griffstückes und/oder die Außenkontur der Anschlusskontur so aufeinander abgestimmt sind, dass zwischen diesen ein oder mehrere Vergusskanäle frei bleiben. Die Vergusskanäle dienen zum Verbinden des inneren Griffstückes mit der Anschlusskontur des Werkzeugteils, so dass beide Teile dauerhaft miteinander verbunden sind. Letztendlich können diese beiden Teile dann nicht mehr zerstörungsfrei voneinander getrennt werden. Zu diesem Zweck werden die Vergusskanäle mit einer für die Verbindung vorgesehenen Masse vergossen.The connection contour of the tool part is designed so that the inner handle is torque-tight connected thereto. Preferably, 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. It is provided that 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. For this purpose, the potting channels are potted with a compound intended for the compound.
Der Griff dieses Handwerkzeuges verfügt neben dem inneren Griffstück über ein äußeres Griffstück, bei dem es sich um ein Kunststoffteil handelt und welches um das innere Griffstück urgeformt ist. Dieser Prozess wird vorgenommen, nachdem das innere Griffstück an die Anschlusskontur angeschlossen ist. Bei dem Prozess des Urformens des äußeren Griffstückes werden der oder die nach außen hin offenen Vergusskanäle verfüllt, so dass bei dem Urformen des äußeren Griffstückes gleichzeitig das innere Griffstück mit der Anschlusskontur des Werkzeugteils verbunden wird. Daher wird grundsätzlich für das Verbinden des inneren Griffstückes an die Anschlusskontur kein separater Fertigungsschritt und auch nicht der Einsatz eines weiteren Materials benötigt. Das auf die Anschlusskontur des Werkzeugteils aufgesetzte innere Griffstück die bei diesem Prozess somit als verlorenes inneres Kunststoffurformwerkzeug anzusprechen.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. In the process of forming 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 Kunststoffurformwerkzeug.
Typischerweise werden die Anschlusskontur und das äußere Griffstück in einem Kunststoffspritzgussfolgewerkzeug in aufeinanderfolgenden Schritten hergestellt. Aufgrund der relativ einfachen auszubildenden Geometrien kann es sich hierbei um ein so genanntes Auf-Zu-Werkzeug handeln, also ein Werkzeug, welches grundsätzlich ohne Schieber oder dergleichen auskommt. Das in einem separaten Werkzeug hergestellte innere Griffstück, typischerweise in einem separaten Kunststoffspritzgusswerkzeug hergestellt, kann hingegen eine auch komplizierte Oberflächengeometrie aufweisen, ebenso wie Durchbrechungen, Kanäle, Hinterschnitte oder dergleichen. Aufgrund der Herstellung des inneren Griffstückes in einem separaten Kunststoffspritzgusswerkzeug kann das für die Fertigung ansonsten verwendete Auf-Zu-Werkzeug mit einer höheren Taktfrequenz gefahren werden. In dieses Werkzeug werden die Halbzeuge umfassend das Werkzeugteil und das auf die Anschlusskontur des Werkzeugteils aufgesetzte innere Griffstück eingelegt.Typically, 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.
Bei einem solchen Verfahren kann ein und dasselbe Urformwerkzeug zum Formen des äußeren Griffstückes genutzt werden, um auch bezüglich ihres Durchmessers unterschiedliche Werkzeugteile darin zu umspritzen. In Abhängigkeit von der Dimensionierung der Anschlusskontur des Werkzeugteils kann es unter Umständen erforderlich sein, bei unterschiedlichen Durchmessern der Werkzeugteile unterschiedliche innere Griffstücke einzusetzen. Insofern kann zur Ausbildung ein und derselben Griffgröße trotz im Durchmesser unterschiedlicher Werkzeugteile, also: unterschiedlicher Klingengrößen bei Schraubendrehern dieselbe Formkavität, in der das äußere Griffstück urgeformt wird, verwendet werden.In one such method, 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. Depending on the dimensioning of 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. In this respect, can be used to form one and the same grip size despite the diameter of different tool parts, ie: different blade sizes screwdrivers in the same mold cavity in which the outer handle is urgeformt.
Zudem können durch das innere Griffstück, welches sodann für das äußere Griffstück die innere Werkzeugoberfläche darstellt, ohne an dem Auf-Zu-Werkzeug Änderungen vornehmen zu müssen, auch unterschiedliche Griffauslegungen realisiert werden. Bei dem Urformen des äußeren Griffstückes werden die in der Formkavität verbleibenden Hohlräume mit dem zur Erstellung des äußeren Griffstückes verwendeten Kunststoffmaterial ausgefüllt, so auch die bereits genannten Vergusskanäle. In Abhängigkeit von der Auslegung des inneren Griffstückes kann somit die Auslegung des Werkzeuggriffes variiert werden. Eine solche Variation ist beispielsweise hinsichtlich der Geometrie von Oberflächenabschnitten des inneren Griffstückes möglich, die auch bei dem fertigen Werkzeuggriff einen Bereich seiner äußeren Oberfläche darstellen. Ohne weiteres ist es bei diesem Konzept möglich, in dem inneren Griffstück auch hinterschnittene Bereiche auszubilden, in die von einer offenen Seite die Kunststoffmasse zur Ausbildung des äußeren Griffstückes eindringt, welche hinterschnittenen Bereiche zumindest eine zu einem nicht mit dieser Kunststoffkomponente zu beschichtenden Oberflächenbereich Durchbrechungen aufweisen. Auf diese Weise können mit der zur Ausbildung des äußeren Griffstückes eingesetzten Kunststoffkomponente auch Logos, Schriftzüge oder dergleichen in Form von ausgefüllten Durchbrechungen an der äußeren Oberfläche des Griffes bereitgestellt werden. Änderungen in der Auslegung des Werkzeuggriffes können somit alleinig durch eine Änderung in der Auslegung des inneren Griffstückes vorgenommen werden. Änderungen des zur Ausbildung der Anschlusskontur und des äußeren Griffstückes verwendeten Auf-Zu-Werkzeuges sind nicht erforderlich.In addition, by the inner handle, which then represents the inner handle surface for the outer handle, without having to make changes to the open-end tool, also different Handle designs are realized. In the original molding of 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. Depending on the design of the inner handle thus 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. It is readily possible with this concept to also form undercut areas in the inner grip piece, into which the plastic mass for forming the outer grip piece penetrates from an open side, which undercut areas have at least one perforations that are not to be coated with this plastic component. In this way, with the plastic component used to form the outer handle also logos, logos or the like can be provided in the form of filled openings on the outer surface of the handle. Changes in the design of the tool handle can thus be made solely by a change in the design of the inner handle. Changes to the used for the formation of the connection contour and the outer handle on-to-tool are not required.
Bei der Herstellung eines solchen Handwerkzeuges können auch Werkzeuggriffe in Kleinserien realisiert werden, was mit herkömmlichen Technologien aus Kostengründen nicht möglich war.In the production of such a hand tool tool handles can be realized in small batches, which was not possible with conventional technologies for cost reasons.
Das innere Griffstück weist vorzugsweise eine größere Härte (nach Shore) auf als das äußere Griffstück. Auf diese Weise kann ein solcher Griff mit einer besonderen Griffigkeit ausgerüstet werden. In einer anderen Ausgestaltung ist vorgesehen, dass das innere Griffstück eine geringere Härte als das äußere Griffstück aufweist. Bei einer solchen Ausgestaltung wirkt das innere Griffstück nach Art eines Kissens, das sich an die Hand einer den Griff benutzenden Person anpasst. Bei einer solchen Ausgestaltung ist das innere Griffstück typischerweise insgesamt von dem äußeren Griffstück umschlossen, welches ebenfalls nachgiebig genug ist, damit der nachgiebige Kisseneffekt des inneren Griffstücks zur Wirkung kommen kann. Dennoch kann über das härtere äußere und bezüglich des weicheren inneren Griffstückes eine Schale bildenden äußeren Griffstückes ein hohes Drehmoment in den Griff und damit in das Werkzeug eingebracht werden.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.
Gemäß einem bevorzugten Ausführungsbeispiel ist das innere Griffstück auf die Anschlusskontur des Werkzeugteils aufschiebbar, und zwar in einer translatorischen Aufschiebebewegung in Längserstreckung des Werkzeugteils. Um das innere Griffstück auf der Anschlusskontur des Werkzeugteils in seiner bestimmungsgemäßen Position zu halten, bis die zum Ausbilden des äußeren Griffstückes verwendete Kunststoffmasse in dem Kunststoffurformwerkzeug erhärtet ist, ist in einer Ausgestaltung vorgesehen, dass das innere Griffstück auf der Anschlusskontur durch eine Rastung fixiert ist. Hierzu kann vorgesehen sein, dass die Anschlusskontur zwei einander diametral gegenüberliegend außenseitig angeordnete Rasten trägt, die in radialer Richtung elastisch verstellbar sind. Das innere Griffstück trägt an entsprechender Stelle jeweils eine Rastausnehmung, in die jeweils eine Raste eingreift, wenn sich das innere Griffstück in seiner bestimmungsgemäßen Position auf der Anschlusskontur befindet. Das zwischen der Anschlusskontur und dem inneren Griffstück verbleibende Spiel und die eigentliche Verbindung zwischen diesen beiden Teilen erfolgt durch das spätere Verfüllen der bereitgestellten Vergusskanäle.According to a preferred embodiment, the inner handle is pushed onto the connection contour of the tool part, in a translatory Aufschiebebewegung in the longitudinal extent of the tool part. In order to hold the inner handle on the connecting contour of the tool part in its intended position until the used for forming the outer handle plastic compound is hardened in the Kunststoffurformwerkzeug, is provided in one embodiment that the inner handle is fixed on the connection contour by a detent. For this purpose, it may be provided that 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.
Wie bereits vorstehend angesprochen, eignet sich dieses Griffkonzept vor allem auch dazu, dass bereichsweise die äußere Oberfläche des inneren Griffstückes zugleich die Oberfläche des Werkzeuggriffes darstellt. Zum Abdichten dieser Oberflächenbereiche, die nicht durch die weitere Kunststoffkomponente zum Erstellen des äußeren Griffstückes beschichtet werden sollen, ist in einer bevorzugten Ausführung vorgesehen, dass diese Bereiche des inneren Griffstückes durch eine umlaufende Dichtlippe begrenzt sind. Diese Dichtlippe wirkt gegen die Innenwand der Kavität zum Formen des äußeren Griffstückes und liegt unter einer gewissen Vorspannung an der Innenwand des Kunststoffurformwerkzeuges an. Bereitgestellt werden kann eine solche Dichtlippe durch eine entsprechende Materialausdünnung des inneren Griffstückes. Da sich eine Felderung der Außenseite des Griffes über den Umfang des Werkzeuggriffes gesehen mehrfach wiederholt, ist durch diese Maßnahme zugleich gewährleistet, dass das innere Griffstück zentriert in dem Kunststoffurformwerkzeug gehalten ist, wenn die Kunststoffkomponente zur Ausbildung des äußeren Griffstückes urgeformt wird. Bei einer solchen Ausbildung des Werkzeuggriffes sind somit grundsätzlich keine weiteren Abstützmaßnahmen zum Halten des zu umspritzenden inneren Griffstückes in dem Kunststoffurformwerkzeug zum Formen des äußeren Griffstückes erforderlich.As already mentioned above, 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. For sealing 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. Since a fielding of the outside of the handle seen over the circumference of the tool handle several times, this measure ensures at the same time, that the inner handle is held centered in the Kunststoffurformwerkzeug when the plastic component is urgeformt to form the outer handle. With such a design of the tool handle, no further support measures for holding the inner handle to be encapsulated in the plastic forming tool for forming the outer grip are therefore fundamentally required.
Bei einer Ausgestaltung, bei der die äußere Oberfläche des Griffes von Teilen des inneren Griffstückes bereitgestellt wird, kann vorgesehen sein, dass diese Bereiche eine besondere Gestaltung und/oder Geometrie aufweisen. So ist in einem Ausführungsbeispiel eines solchen Werkzeuggriffes als Schraubendrehergriff vorgesehen, dass in denjenigen Bereichen des inneren Griffstückes, die die äußere Oberfläche des Schraubendrehergriffes bilden, mehrere umfängliche außenseitig verteilt angeordnete Drehmitnahmesicke angeordnet sind. Eine solche Ausgestaltung ist nicht auf das beschriebene Ausführungsbeispiel dieses Werkzeuggriffes als Schraubendrehergriff beschränkt, sondern kann auch bei anderweitigen Werkzeuggriffen eingesetzt werden. Wenigstens einige dieser Drehmitnahmesicken sind zumindest abschnittsweise gegenüber der Grifflängsachse in ihrer Erstreckung in Richtung zur Klinge des Schraubendrehergriffes entgegen der Einschraubrichtung geneigt. Zudem weisen diese Drehmitnahmesicken an ihrer entgegen der Einschraubrichtung weisenden Seite eine mit geringem Winkel gegenüber der den Griff einhüllenden Mantelfläche geneigte Stellfläche auf. Bei einem solchen Schraubendrehergriff sind Drehmitnahmesicken vorhanden, die mit ihrer Längserstreckung gegenüber der Längserstreckung des Griffes geneigt sind und somit im Unterschied zu Drehmitnahmesicken aus dem Stand der Technik nicht parallel zur Längserstreckung des Griffes verlaufen. Die Neigung der Längserstreckung dieser Drehmitnahmesicken ist entgegen der Einschraubrichtung gerichtet, wenn von ihrem rückwärtigen Ende in Richtung zur Klinge betrachtet. Diese Drehmitnahmesicken weisen an ihrer entgegen der Einschraubrichtung weisenden Seite eine Stellfläche auf, die mit einem nur geringen Winkel gegenüber der Mantelfläche des Griffes oder der den Griff einhüllenden Mantelfläche geneigt ist. Als geringe Winkel werden im Rahmen dieser Ausführungen Winkel angesehen, die kleiner als 25° sind. Eine solchermaßen konzipierte Drehmitnahmesicke gewährleistet neben einer Einleitung eines Drehmomentes in den Schraubendrehergriff zum Einschrauben einer Schraube aufgrund der geneigten Ausführung einer solchen Drehmitnahmesicke im Bezug auf die Längserstreckung des Schraubendrehergriffes zugleich auch die Bereitstellung eines in längsaxialer Richtung des Schraubendrehergriffes in Richtung zu der Drehmomentübertragungskontur der Klinge hin wirkenden Momentes. Dieses Moment dient zum Beibehalten einer Ineingriffstellung der Klinge des Schraubendrehers mit der Drehmitnahmekontur des Schraubenkopfes bei Anlegen eines Drehmomentes. Infolge dieser Drehmitnahmesicken wird ein Teil des eingebrachten Drehmomentes für das benötigte Ineingriffstellungsmoment genutzt. Insofern ist es bei einem solchen Schraubendrehergriff nicht unbedingt notwendig, eine zusätzliche Andrückkraft aufzuwenden. Bei besonders schwergängigen Schrauben kann dies noch zusätzlich sinnvoll sein.In an embodiment in which 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. Thus, in one embodiment of such 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. In addition, these 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. In such a screwdriver handle 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 Drehitnahmesicken 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. As a low angle are considered in the context of these designs angle, which are smaller than 25 °. 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. As a result of these rotational driving beads, 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.
Von besonderem Vorteil ist, dass dieses für die Eingriffstellung bereitgestellte Moment an das eingekoppelte Drehmoment gekoppelt ist. Dies bedeutet, dass bei einem hohen angelegten Drehmoment auch das die Ineingriffstellung zwischen Klinge und Schraube beizubehaltende Moment entsprechend höher ist. Damit ist allein durch die spezielle Schraubendrehergriffauslegung Sorge dafür getragen, dass auch bei einem hohen angelegten Drehmoment auf den Schraubendrehergriff die Klinge nicht aus der Drehmitnahmekontur der Schraube herausgehebelt wird.It is particularly advantageous that 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.
Die entgegen der Einschraubrichtung bereitgestellte Stellfläche ist mit nur einem geringen Winkel gegenüber der Mantelfläche des Griffes oder der den Griff einhüllenden Mantelfläche geneigt. Hierdurch ist verhindert, dass bei einem möglichen Schlupf zwischen der Hand einer den Schraubendreher benutzenden Person und dem Schraubendrehergriff Haut der Handinnenseite geklemmt wird.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.
Diese geneigten Drehmitnahmesicken können zusätzlich zu ohnehin vorhandenen Drehmitnahmesicken, die bezüglich ihrer Längserstreckung der Längserstreckung des Schraubendrehergriffes folgen, vorgesehen sein. Gleichfalls ist es möglich, dass der Schraubendrehergriff nur in der vorstehend genannten Art und Weise geneigt ausgeführte Drehmitnahmesicken aufweist.These 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.
In einer Ausgestaltung eines solchen Schraubendrehergriffes ist vorgesehen, dass die Drehmitnahmesicken bezüglich ihrer Längserstreckung gekrümmt sind, wobei sich der Winkel zwischen dem jeweiligen Abschnitt der Drehmitnahmesicke und der Grifflängsachse in Richtung zur Klinge hin vergrößert.In one embodiment of such a screwdriver handle is provided that the 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.
Untersuchungen haben gezeigt, dass es ausreichend ist, wenn sich diese gegenüber der Längsachse geneigt ausgelegten Drehmitnahmesicken auf einen mittleren Abschnitt des Schraubendrehergriffes in Bezug auf seine Längserstreckung begrenzt sind. Damit befinden sich diese Drehmitnahmesicken typischerweise in dem Bereich des Schraubendrehergriffes, in dem dieser im Bezug auf seine typische Tonnenform seinen größten Durchmesser aufweist, in welchem Abschnitt des Schraubendrehergriffes das größte Drehmoment angelegt wird.Investigations have shown that it is sufficient if these spaced apart from the longitudinal axis of rotary driving beads are limited to a central portion of the screwdriver handle with respect to its longitudinal extent. Thus, these rotational driving beads are typically in the area of the screwdriver handle in which this has its largest diameter in relation to its typical barrel shape, in which portion of the screwdriver handle the maximum torque is applied.
Eine besonders bevorzugte Ausgestaltung eines solchen Schraubendrehergriffes wird darin gesehen, dass der Schraubendrehergriff eine in Umfang gesehen rundliche Mantelfläche aufweist, insbesondere eine Querschnittsgeometrie, bei der mehrere, typischerweise drei Zykloidbogen-Abschnitte vorgesehen sind, die durch Abschnitte mit einem deutlich kleineren Krümmungsradius miteinander verbunden sind. In eine solche typischerweise glatte Mantelfläche des Schraubendrehergriffes sind bei dieser bevorzugten Ausführungsform, wobei die nachstehende Ausgestaltung sich ebenfalls bei anderen Griffformen einsetzen lässt, die Drehmitnahmesicken durch in die äußere Oberfläche eingebrachte Vertiefungen herausgearbeitet, und zwar im Bereich der Zykloidbögen. Bei einer solchen Ausgestaltung wird die den Werkzeuggriff einhüllende Mantelfläche hinsichtlich ihrer Geometrie vorzugsweise nicht geändert, so dass die Drehmitnahmesicken keine über die ansonsten bei einem solchen Griff gewohnte Mantelfläche hervorstehende Rippen, Wülste oder dergleichen sind. Eine derartige Vertiefung ist typischerweise V-förmig ausgeführt, wobei die Öffnungsweite der Flanken relativ groß ist und typischerweise einen Winkel von 160° überschreitet. Dies impliziert, dass die Tiefe der Vertiefungen zum Herausarbeiten der Stellschräge für die Drehmitnahmesicken nicht besonders tief sein muss, um eine hinreichend große Stellfläche bereitzustellen. Es wird als ausreichend angesehen, wenn die maximale Tiefe einer solchen Vertiefung zum Ausbilden einer solchen Stellfläche 0,5 mm beträgt. Durch die geringe Neigung der Stellfläche ist diese trotz der geringen Tiefe einer die Stellfläche herausarbeitenden Vertiefung hinreichend groß, d.h. die Stellfläche hat eine hinreichende Erstreckung von der Tiefenlinie der Vertiefung bis zum oberen Abschluss der Drehmitnahmesicke, um eine aus einem angelegten Drehmoment das gewünschte in Längsrichtung wirkende Moment abzuleiten.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. In such a typical smooth surface of the screwdriver handle, in this preferred embodiment, wherein the following embodiment can also be used in other handle shapes, the rotational driving beads worked out by introduced into the outer surface depressions, in the field of Zykloidbögen. In such an embodiment, 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. Such 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. 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.
In einer vorteilhaften Ausgestaltung ist vorgesehen, dass die Erstreckung derjenigen Stellfläche der Drehmitnahmesicke, die entgegen der Einschraubrichtung weist, von ihrem zum rückseitigen Abschluss des Schraubendrehergriffes weisenden Ende bis zu ihrem anderen Ende hin in der Erstreckung von der Tiefenlinie der diese Stellfläche bildenden Vertiefung bis zum oberen Abschluss hin sukzessive zunimmt. Damit befindet sich die größte Höhe der Stellfläche der Drehmitnahmesicke, vor allem, wenn die Längsachse der Drehmitnahmesicke in der vorbeschriebenen Weise gekrümmt ist, in demjenigen Abschnitt, in dem das aus dem eingekoppelten Drehmoment abgeleitete Moment in längsaxialer Richtung am größten ist.In an advantageous embodiment, it is provided that 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.
Auch wenn es für das Einschrauben einer Schraube ausreichend ist, einen solchen Schraubendrehergriff mit nur einer entgegen der Einschraubrichtung aufweisenden Stellfläche auszurüsten, ist in einer Weiterbildung vorgesehen, die Drehmitnahmesicke auch an ihrer in Einschraubrichtung weisenden Seite durch eine Vertiefung zu begrenzen. Diese Vertiefung ist analog der vorbeschriebenen Vertiefung zum Ausbilden der entgegen der Einschraubrichtung weisenden Stellfläche konzipiert. Durch eine solche weitere Vertiefung, die vorzugsweise ebenfalls asymmetrisch ausgebildet ist, sind für den Einschraubvorgang zwei in Einschraubrichtung aufeinanderfolgende Stellflächen gebildet, was die Bereitstellung des gewünschten Ineingriffstellungsmomentes unterstützt.Even if it is sufficient for screwing a screw to equip such a screwdriver handle with only one counter to the screwing having footprint, is provided in a development to limit the rotational driving bead also at its pointing in the screwing direction by a recess. This recess is designed analogously to the above-described recess for forming the counter to the direction of insertion facing footprint. By such a further recess, which is preferably also formed asymmetrically, two successive in the screwing direction shelves are formed for the screwing, which supports the provision of the desired Ineingriffstellungsmomentes.
Die Erfindung ist nachfolgend anhand eines Ausführungsbeispiels unter Bezugnahme auf die beigefügten Figuren beschrieben. Es zeigen:
Nachfolgend ist die Erfindung anhand eines Ausführungsbeispiels unter Bezugnahme auf die beigefügten Figuren beschrieben. Es zeigen:
- Fig. 1:
- einen Schraubendreher, umfassend ein Werkzeugteil und einen Griff in einer perspektivischen Darstellung,
- Fig. 2:
- das Werkzeugteil des Schraubendrehers der
Figur 1 mit einer daran angeordneten Anschlusskontur, - Fig. 3:
- eine Stirnseitenansicht auf die Anschlusskontur des Werkzeugteils der
Figur 2 , - Fig. 4:
- eine perspektivische Darstellung eines zur Ausbildung des Griffes des Schraubendrehers der
Figur 1 verwendetes inneres Griffstück, - Fig. 4a:
- eine vergrößerte Teilschnittdarstellung des inneren Griffstückes der
Figur 4 , - Fig. 5:
- eine Ansicht in eine innere Drehmitnahmekontur des inneren Griffstückes der
Figur 4 , - Fig. 6:
- eine Rückseitenansicht auf das in
der Figur 4 gezeigte innere Griffstück, - Fig. 7:
- eine vergrößerte Darstellung eines Ausschnittes aus dem Griff des Schraubendrehers der
Figur 1 und - Fig. 8:
- einen schematisierten Schnitt durch den Griff entlang der Linie A-B der
.Figur 7
The invention is described below with reference to an embodiment with reference to the accompanying figures. Show it:
- Fig. 1:
- a screwdriver comprising a tool part and a handle in a perspective view,
- Fig. 2:
- the tool part of the screwdriver
FIG. 1 with a connection contour arranged thereon, - 3:
- an end view of the connection contour of the tool part of
FIG. 2 . - 4:
- a perspective view of one for forming the handle of the screwdriver
FIG. 1 used inner handle, - Fig. 4a:
- an enlarged partial sectional view of the inner handle of the
FIG. 4 . - Fig. 5:
- a view into an inner rotary driving contour of the inner handle of the
FIG. 4 . - Fig. 6:
- a backside view of that in the
FIG. 4 shown inner handle, - Fig. 7:
- an enlarged view of a section of the handle of the screwdriver
FIG. 1 and - Fig. 8:
- a schematic section through the handle along the line AB of
FIG. 7 ,
Ein Schraubendreher 1 als Handwerkzeug umfasst ein Werkzeugteil 2 und einen Griff 3. Bei dem Werkzeugteil 2 handelt es sich um die Klinge des Schraubendrehers 1, die an ihrem freien Ende eine Drehmitnahmekontur 4 trägt. Bei dem dargestellten Ausführungsbeispiel ist die Drehmitnahmekontur 4 als Kreuzkontur ausgeführt, damit mit dem Schraubendreher 1 eine Kreuz-Schlitz-Schraube betätigt werden kann.A screwdriver 1 as a hand tool comprises a
Der Griff 3 des Schraubendrehers 1 ist aus mehreren Komponenten zusammengesetzt. Bei dem dargestellten Ausführungsbeispiel besteht der Griff 3 aus zwei Komponenten, und zwar einem inneren Griffstück 5 und einem äußeren Griffstück 6. Da das innere Griffstück 5 bei dem dargestellten Ausführungsbeispiel zum Teil die äußere Oberfläche des Griffes 3 des Schraubendrehers 1 darstellt, ist diese Komponente in
Die Anschlusskontur 7 endet in Richtung zu der Drehmitnahmekontur 4 des Werkzeugteils 2 in einem Teller 12.The
Bei dem dargestellten Ausführungsbeispiel umfasst das Werkzeugteil 2 letztendlich die aus einem Werkzeugteil hergestellte Klinge mit der Drehmitnahmekontur 4 und die daran urgeformte Anschlusskontur 7.In the illustrated embodiment, the
Zum Herstellen des Griffes 3 wird das innere Griffstück 5, welches in
Bei dem dargestellten Ausführungsbeispiel bilden Teile der äußeren Oberfläche des inneren Griffstückes 5 zugleich die äußere Oberfläche des Griffes 3 des Schraubendrehers 1. Die diesbezüglichen Abschnitte des inneren Griffstückes 5 bilden eine gewisse Felderung an der Außenseite des Griffes 3 aus. Die diese Felderung des Griffes 3 bildenden Bereiche des inneren Griffstückes sind voneinander getrennt, damit zwischen diesen Feldern das äußere Griffstück ausgebildet werden kann. Bei der späteren Ausbildung des äußeren Griffstückes 6 werden die in dem inneren Griffstück 5 befindlichen Vertiefungen gegenüber der Außenseite der die Felderung bildenden Bereiche mit einer Kunststoffmasse verfüllt. Die die Felderung ausbildenden Bereiche sind, wie aus der Ansicht auf die Rückseite des inneren Griffstückes 5 der
Um eine Beschichtung der äußeren Oberfläche 15 derjenigen Bereiche des inneren Griffstückes 5 mit der für die Erstellung des äußeren Griffstückes 6 verwendeten Kunststoffmasse zu verhindern, sind die diesbezüglichen Bereiche des inneren Griffstückes 5 umlaufend durch eine Dichtlippe 16 begrenzt.
Teil des inneren Griffstückes 5 ist, wie aus
Zur Ausbildung des äußeren Griffstückes 6 wird das Werkzeugteil 2 mit dem auf seine Anschlusskontur 7 aufgeschobenen inneren Griffstück 5 in ein Kunststoffurformwerkzeug eingelegt. Die Formkavität dieses Werkzeuges entspricht der zu erstellenden äußeren Form des äußeren Griffstückes 6. Da umfänglich verteilt mit gleichem Winkelabstand zueinander bei dem dargestellten Ausführungsbeispiel drei Oberflächenbereiche 15 des inneren Griffstücks 5 vorgesehen sind, die nicht durch die Kunststoffmasse zur Ausbildung des äußeren Griffstückes 6 beschichtet werden sollen und diese drei in radialer Richtung nach außen weisenden Oberflächenbereiche 15 jeweils durch eine umlaufende Dichtlippe 16 begrenzt sind, wirken diese gegen die Innenwandung der Formkavität, und zwar unter einer gewissen Vorspannung. Hierdurch wird die Anordnung des inneren Griffstückes 5 mit dem daran angeschlossenen Werkzeugteil 2 innerhalb der Formkavität zentriert. Zusätzliche Zentriermaßnahmen sind bei einer solchen Ausgestaltung somit grundsätzlich nicht erforderlich.To form the
Die in der Werkzeugkavität verbliebenen Hohlräume, wozu auch die Hohlräume innerhalb des inneren Griffstückes 5 und die Vergusskanäle 11 zwischen dem inneren Griffstück 5 und der Anschlusskontur 7 zählen, werden durch die zum Urformen des äußeren Griffstückes 6 in das Formwerkzeug eingebrachte Kunststoffmasse vollständig ausgefüllt. Somit wird die Kunststoffmasse zur Ausbildung der äußeren Griffschale 6 ebenfalls zur Verbindung des inneren Griffstückes 5 mit der Anschlusskontur 7 des Werkzeugteils 2 verwendet.The remaining in the mold cavity cavities, including the cavities within the
In einem in den Figuren nicht dargestellten Ausführungsbeispiel ist an die Anschlusskontur des Werkzeugteils, sich bis zur Drehmitnahmekontur desselben erstreckend, eine Isolierung vorgesehen.In an embodiment, not shown in the figures, an insulation is provided to the connection contour of the tool part, extending to the rotary driving contour of the same.
Der durch das innere Griffstück 5 gebildete und in
Durch die Vertiefung 19 ist eine entgegen der Einschraubrichtung weisende Stellfläche 23 bereitgestellt. Wird auf den Griff 3 durch eine den Griff 3 umfassende Hand ein Drehmoment ausgeübt, wird ein Teil des darauf einwirkenden Drehmomentes aufgrund der gegenüber der Längsachse L geneigten Ausrichtung der Stellfläche 23 in ein in Richtung zu der Drehmitnahmekontur 4 gerichtetes Moment gebracht. Die Tiefenlinie 24 der Vertiefung 19 geht zu beiden Enden in die angrenzende Griffoberfläche über. Dies hat zur Folge, dass die Stellfläche 23 von ihrem von dem Werkzeugteil 2 wegweisenden Ende zu ihrem anderen Ende hin sukzessive zunimmt. Die Vertiefung 19 selbst ist in ihrer Querschnittsgeometrie V-förmig, wie dieses schematisiert in
Die Drehmomentsicke 18 ist in Einschraubrichtung durch die Vertiefung 20 begrenzt. Durch die Vertiefung 20 ist eine zweite Stellfläche 25 gebildet, die entgegen die Einschraubrichtung weist. Bei Anlegen eines Drehmomentes auf den Griff 3 durch die Hand eines Benutzers wird somit durch die Vertiefungen 19, 20 und die dadurch gebildeten Stellflächen 23, 25 nicht nur eine Drehbewegung auf den Griff 3 übertragen, wozu auch die zuvor beschriebenen längsaxialen Drehmitnahmesicken dienen, sondern über beide Stellflächen 23, 25 wird ein Anteil des eingeleiteten Momentes in längsaxialer Richtung zu der Drehmitnahmekontur 4 hin abgeleitet, durch welches Moment der Schraubendreher 1 dem sukzessiven Vorschub einer damit betätigten Schraube quasi selbsttätig folgt, jedenfalls solange ein Drehmoment angelegt ist.The
In einer in den Figuren nicht dargestellten Ausgestaltung ist vorgesehen, dass nur eine der beiden in
Ohne den Umfang der geltenden Ansprüche zu verlassen, ergeben sich für einen Fachmann zahlreiche weitere Möglichkeiten, die Erfindung auszuführen.Without departing from the scope of the present claims, numerous other ways for the skilled person to carry out the invention will be apparent to those skilled in the art.
- 11
- Schraubendreherscrewdriver
- 22
- Werkzeugteiltool part
- 33
- GriffHandle
- 44
- DrehmitnahmekonturRotary entrainment contour
- 55
- inneres Griffstückinner handle
- 66
- äußeres Griffstückouter handle
- 77
- Anschlusskonturconnecting contour
- 88th
- Rastenotch
- 99
- Ripperib
- 1010
- Mantelflächelateral surface
- 1111
- Vergusskanalcasting channel
- 1212
- DrehmitnahmekonturRotary entrainment contour
- 1313
- Seitenflächeside surface
- 1414
- Durchbrechungperforation
- 1515
- äußere Oberflächeouter surface
- 1616
- Dichtlippesealing lip
- 1717
- Symboliksymbolism
- 1818
- DrehmitnahmesickeRotationally driving bead
- 1919
- Vertiefungdeepening
- 2020
- Vertiefungdeepening
- 2121
- Flachseiteflat side
- 2222
- Scheitelvertex
- 2323
- Stellflächefootprint
- 2424
- Tiefenliniedepth line
- 2525
- Stellflächefootprint
- LL
- Längsachselongitudinal axis
Claims (15)
- A hand-held tool comprising a tool part (2) and a handle (3) surrounding a portion of the tool part (2) and connected to same in a torque-transmitting manner, characterized in that- the tool part (2) comprises, at least in some regions of a portion surrounded by the handle (3), a connection contour (7) used to connect the handle (3) in a torque-transmitting manner, and- the handle (3) comprises an inner handle piece (5) which can be connected to the connection contour (7) and surrounds same in a torque-transmitting manner, one or more outwardly open casting channels (11) being provided between both parts (5, 7) when the inner handle piece (5) is slid onto the connection contour (7), as well as an outer handle piece (6) made of plastics material, which during a plastics molding process is molded around the unit comprising the tool part (2) and inner handle piece (5) connected to the connection contour (7) thereof and the at least one casting channel (11) being at least partially filled with the plastics material which forms the outer handle piece (6).
- The hand-held tool of claim 1, characterized in that the inner handle piece (5) is a plastics part which is manufactured in a tool that is separate with respect to the production of the connection contour (7) and of the outer handle piece (6).
- The hand-held tool of claim 1 or claim 2, characterized in that the connection contour (7) is a plastics part which is injection-molded around a portion of the tool part (2).
- The hand-held tool of any of claims 1 to 3, characterized in that the connection contour (7) is designed in cross-section as a polygonal contour having regions that are recessed from the lateral surface (10) which virtually envelopes the connection contour (7), the inner handle piece (5) not or only partially engaging in the recessed regions of the cross-section and the portions which remain free forming a respective casting channel (11).
- The hand-held tool of any of claims 1 to 4, characterized in that the inner handle piece (5) is fixed by means of a detent arrangement (8, 14) on the connection contour (7).
- The hand-held tool of claim 5, characterized in that the connection contour (7) carries at least one detent (8) on the outer side thereof which, when the inner handle piece (5) is slid over the connection contour (7), engages in a detent recess (14) of the inner handle piece (5).
- The hand-held tool of any of claims 1 to 6, characterized in that at least one outer surface portion (15) of the inner handle piece (5) also forms a region of the outer surface of the handle (3) of the hand-held tool (1).
- The hand-held tool of claim 7, characterized in that the edge of a region of the inner handle piece (5) that delimits the outer surface (15) of the handle (3) is formed by a sealing lip (16), which, during the plastics molding process for creating the outer handle piece (6), abuts against the inner mold cavity of the molding tool.
- The hand-held tool of claim 7 or claim 8, characterized in that at least one surface portion (15) of the inner handle piece (5) forming the outer surface of the handle (3) is provided with a soft coating.
- The hand-held tool of any of claims 7 to 9, characterized in that at least one surface portion (15) of the inner handle piece (5) forming the outer surface of the handle (3) has one or more apertures, which are filled with the material of the outer handle piece (6).
- The hand-held tool of claim 10, characterized in that the aperture or the apertures are designed as text and/or a logo.
- The hand-held tool of any of claims 1 to 11, characterized in that the hand-held tool is a screwdriver (1).
- The hand-held tool of claim 12, characterized in that the handle (3) of the screwdriver carries a plurality of rotary entrainment corrugations (18), which are arranged in a circumferentially distributed manner on the outer side, at least some of the rotary entrainment corrugations (18) being inclined, at least in portions, with respect to the handle longitudinal axis (L), over their extension towards the blade (2) of the screwdriver (1), against the screwing-in direction, and said rotary entrainment corrugations (18) being provided, on the side thereof directed against the screwing-in direction, with an adjustment surface (23) which is inclined at a slight angle with respect to the lateral surface enveloping the handle (3).
- A method for producing a hand-held tool, provided with a tool handle (3) connected to a tool part (2), comprising the following steps:- providing a tool part (2),- molding a connection contour (7) from plastics material, having an outer rotary entrainment contour (12) and outwardly open casting channels (11) around a portion of the tool part (2),- providing an inner handle piece (5) surrounding the connection contour (7) in a torque-transmitting manner and connecting same to the connection contour (7), and- molding an outer handle piece 6 from plastics material in a molding tool on the inner handle piece (5) positioned in the molding tool and connected to the connection contour (7), during which molding process cavities between the inner handle piece (5) and the connection contour (7), such as the casting channels (11), are also at least partially filled with the plastics material provided for forming the outer handle piece (6) and thus the inner handle piece (5) is connected to the connection contour (7).
- The method of claim 14, characterized in that the connection contour (7) and the outer handle piece (6) are produced in a plastics molding follow-on tool, in the course of successive steps, whereas the inner handle piece (5) is produced in a separate molding tool and is connected, before the step of molding the outer handle piece (6), to the molded and hardened connection contour (7).
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE202015102811.3U DE202015102811U1 (en) | 2015-06-01 | 2015-06-01 | hand tool |
PCT/EP2016/062280 WO2016193266A1 (en) | 2015-06-01 | 2016-05-31 | Hand-held tool and method for producing such a hand-held tool |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3302892A1 EP3302892A1 (en) | 2018-04-11 |
EP3302892B1 true EP3302892B1 (en) | 2018-09-26 |
Family
ID=56108629
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16727428.1A Active EP3302892B1 (en) | 2015-06-01 | 2016-05-31 | Hand-held tool and method for producing such a hand-held tool |
Country Status (5)
Country | Link |
---|---|
US (1) | US10857662B2 (en) |
EP (1) | EP3302892B1 (en) |
DE (1) | DE202015102811U1 (en) |
ES (1) | ES2702557T3 (en) |
WO (1) | WO2016193266A1 (en) |
Families Citing this family (1)
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)
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 (en) * | 1996-02-21 | 1997-07-17 | Hahn Willi Gmbh | Screwing tool with grip |
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 (en) * | 2004-12-23 | 2006-08-24 | Felo-Werkzeugfabrik Holland-Letz Gmbh | Use of a handle for a screwdriver |
DE102006061068A1 (en) * | 2006-03-03 | 2007-09-06 | Felo-Werkzeugfabrik Holland-Letz Gmbh | Method for fabricating grip-handle e.g. for screw driver, involves providing second material, later forming inner layer, with foaming agent |
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 (en) * | 2009-03-13 | 2010-03-24 | 株式会社ベッセル工業 | Grip, tool, and grip manufacturing method |
-
2015
- 2015-06-01 DE DE202015102811.3U patent/DE202015102811U1/en not_active Expired - Lifetime
-
2016
- 2016-05-31 EP EP16727428.1A patent/EP3302892B1/en active Active
- 2016-05-31 US US15/578,026 patent/US10857662B2/en active Active
- 2016-05-31 ES ES16727428T patent/ES2702557T3/en active Active
- 2016-05-31 WO PCT/EP2016/062280 patent/WO2016193266A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
US20180290287A1 (en) | 2018-10-11 |
ES2702557T3 (en) | 2019-03-01 |
EP3302892A1 (en) | 2018-04-11 |
US10857662B2 (en) | 2020-12-08 |
DE202015102811U1 (en) | 2016-09-06 |
WO2016193266A1 (en) | 2016-12-08 |
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