EP3208047B1 - Absorbierendes schlagwerkzeug und herstellungsverfahren eines solchen werkzeugs - Google Patents

Absorbierendes schlagwerkzeug und herstellungsverfahren eines solchen werkzeugs Download PDF

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Publication number
EP3208047B1
EP3208047B1 EP16207256.5A EP16207256A EP3208047B1 EP 3208047 B1 EP3208047 B1 EP 3208047B1 EP 16207256 A EP16207256 A EP 16207256A EP 3208047 B1 EP3208047 B1 EP 3208047B1
Authority
EP
European Patent Office
Prior art keywords
tool
handle
active part
accordance
shock absorption
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP16207256.5A
Other languages
English (en)
French (fr)
Other versions
EP3208047A1 (de
Inventor
Bruno Racodon
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Racodon Outillage
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Racodon Outillage
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Filing date
Publication date
Application filed by Racodon Outillage filed Critical Racodon Outillage
Publication of EP3208047A1 publication Critical patent/EP3208047A1/de
Application granted granted Critical
Publication of EP3208047B1 publication Critical patent/EP3208047B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D3/00—Hand chisels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25G—HANDLES FOR HAND IMPLEMENTS
    • B25G1/00—Handle constructions
    • B25G1/01—Shock-absorbing means
    • 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
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • B25D2222/57—Elastomers, e.g. rubber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/54—Plastics
    • B25D2222/66—Polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/105—Exchangeable tool components
    • B25D2250/111—Bits, i.e. inserts or attachments for hammer, chisel, pick
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2250/00—General details of portable percussive tools; Components used in portable percussive tools
    • B25D2250/371—Use of springs
    • B25D2250/375—Fluid springs

Definitions

  • the present invention relates to a striking tool according to the preamble of claim 1, and a method of manufacturing such a tool.
  • a typing tool is known from the document US 1 604 007 A .
  • the tool is for example a punch, a chisel, a pin punch, etc.
  • the field of the invention is that of hand tools allowing an operator to strike on a target element. Depending on the type of tool, this target element may be a floor surface, a wall, a burr, a seal, a pin, etc.
  • a typing tool typically includes a handle and an active part.
  • the operator holds the handle in his hand and positions the active part against the target element. Then the operator hits the rear end of the handle, for example with a hammer, so that the front end of the active part strikes the target element.
  • the handle and the active part are generally made of metal materials, especially steel alloys. These materials can be distinct to accommodate the different stresses experienced by the handle and the active part when using the tool.
  • a shock wave rises along the tool, from the active portion to the handle. This shock wave is propagated in the hand, wrist and arm of the operator, to the elbow.
  • the manipulation of a striking tool over a prolonged period of time can cause some fatigue, even serious injury, in the operator.
  • the handle of the tool may comprise a casing made of elastomeric material designed to dampen the impact.
  • the shock wave propagates to the contact interface between the active part and the handle, along the longitudinal axis of the tool, so that the envelope only partially protects the operator.
  • a striking tool comprising: an elongate handle in a longitudinal direction and adapted to hold the tool, an active part intended to strike a target element, an intermediate piece for assembling the handle and the active part, and means shock absorber, in the form of a disc and a rubber ring housed between the handle and the intermediate piece.
  • the shock wave propagates from the active part to the intermediate piece, then to the handle being damped by the disc and the ring.
  • the object of the present invention is to provide an improved typing tool.
  • the subject of the invention is a striking tool as defined in claim 1.
  • the tool comprises: an elongated handle in a longitudinal direction and adapted to hold the tool, an active part assembled with the handle and intended to strike a target element, and shock absorption means interposed between the handle and the part active in the longitudinal direction of the tool.
  • the invention improves operator comfort of use, and reduce the risk of injury in the long term.
  • the shock wave propagating along the longitudinal direction of the tool is damped and absorbed by the absorption means. More specifically, the shock wave is damped and absorbed by the piece of elastomeric material, then dissipates in the fluid.
  • the known devices damp the shock wave without absorbing and then dissipating it, so that it is partly transmitted to the operator.
  • the piece of polymer material is a spherical ball.
  • a piece is very easy to manufacture and then to integrate with the tool. Its positioning is correct regardless of its orientation, which is not the case of a record for example.
  • the fluid is air.
  • the fluid is oil
  • the handle and the active part are fitted together, delimiting between them a reception space of the shock absorption means.
  • this space has a substantially stable volume and shock absorption means remain substantially immobile, unlike some existing tools, equipped with springs or other compression parts.
  • the reception space of the shock absorbing means comprises a fluid receiving orifice, and a chamber receiving the piece of polymer material which partially penetrates into the orifice.
  • the handle and the active part are both monoblocs.
  • the tool consists solely of three components: the one-piece handle, the one-piece active part, and the shock absorption means.
  • the handle having a rear end intended to be struck by an operator, the active part having a front end intended to exert an impact, then the shock absorption means are closer to the front end than to from the back end.
  • the active part is housed in the handle.
  • the handle is housed in the active part.
  • the invention also relates to a method of manufacturing a tool as mentioned above.
  • the method is characterized in that it comprises a step of positioning the shock absorption means between the handle and the active portion in the longitudinal direction of the tool.
  • the method comprises a step of securing the handle and the active part by press fit, while the shock absorbing means are interposed between the handle and the active part.
  • the method comprises a step of forming a reception space of the shock absorbing means, at least in part by drilling in the handle or in the active part in the longitudinal direction of the tool, before positioning the means. shock absorption.
  • Tool 1 is designed to strike a target element 2, shown schematically in FIG. figure 1 only for the sake of simplification.
  • the tool 1 has an elongate shape along a longitudinal axis X1.
  • the tool 1 comprises a handle 10 and an active part 20 centered on the axis X1.
  • the tool 1 comprises shock absorption means 30 interposed between the handle 10 and the active part 20, in the longitudinal direction of the tool 1 defined by the axis X1.
  • the handle 10 is made of metal, preferably steel. In practice, the material of the handle 10 is chosen according to the type of tool 1 and standards.
  • the handle 10 is elongated between a rear end 11 and a front end 12.
  • the handle 10 is hand-held by the operator, between the ends 11 and 12.
  • the end 11 is intended to be struck by the operator, usually using a hammer or a hammer.
  • the end 12 is provided to receive the active portion 20.
  • the handle 10 has a cavity 13 formed at its end 12. The cavity 13 is centered on the axis X1 and opens at the end 12.
  • the cavity 13 comprises a frustoconical mouth 14, two cylindrical bores 15 and 16 delimited by a recess 17, and a radial shoulder 18 at its bottom.
  • the mouth 14 is flared outwards, so as to facilitate the introduction of the active part 20 into the cavity 13.
  • the bore 16 has a diameter smaller than the bore 15, so as to receive the active part 20 by press fit.
  • the shoulder 18 faces the mouth 14.
  • the cavity 13 is in communication with a cylindrical orifice 19 provided with a frustoconical bottom 19a.
  • the orifice 19 and its bottom 19a are formed during the drilling of a first bore for making the cavity 13 in the handle 10.
  • the shoulder 18 separates the cavity 13 and the orifice 19.
  • the active part 20 is made of metal, preferably steel. In practice, the material and the shape of the active part 20 are chosen according to the type of tool 1 and standards. In the embodiment of Figures 1 to 4 the active part 20 is a cylindrical needle. The active part 20 is elongated between a rear end 21 and a front end 22.
  • the end 21 is provided to be fitted into the cavity 13 of the handle 10.
  • the end 21 has a bearing surface 23, radial flat circular shape.
  • the end 21 also comprises a frustoconical portion 25 facilitating the introduction of the active portion 20 into the cavity 13.
  • the end 22 is provided to exert an impact on the target element 2, when the operator exerts an impact on the end 11 of the handle 10.
  • the end 22 has a striking surface 24 radial, flat circular shape.
  • the absorption means 30 comprise a ball 31 made of a polymeric material, especially an elastomer or thermoplastic material, for example polychloroprene (CR), polypropylene (PP) or polyvinyl chloride (PVC).
  • the ball 31 has a spherical shape.
  • the absorption means 30 may comprise a piece of polymer material of any suitable shape, for example cylindrical or parallelepipedal.
  • the absorption means 30 comprise a single piece of polymer material, not several pieces, which simplifies the manufacture of the tool 1.
  • the ball 31 is housed in a chamber 39 delimited at the bottom of the cavity 13, between the bore 16, the shoulder 18 and the surface 23. When the active portion 20 is fitted into the cavity 13, the ball 31 is compressed against the shoulder 18 and partially penetrates into the orifice 19.
  • the absorption means 30 also comprise air 32, which is contained between the ball 31 and the handle 10, in the orifice 19.
  • the absorption means 30 are designed and arranged to absorb the shock wave propagating in the longitudinal direction of the tool 1, without the transmit to the operator. His working comfort is improved, and his risk of injury is reduced.
  • the manufacturing method of the tool 1 is detailed below.
  • the method comprises a step of manufacturing the handle 10, for example by forging or casting, then machining the external profile and the cavity 13.
  • the method comprises a step of manufacturing the active part 20, for example by forging or casting, and then machining the external profile.
  • the method comprises a step of forming the receiving space 19 + 39 of the shock absorption means 30 before positioning them in the tool 1.
  • This space 19 + 39 is formed at least in part by drilling in the handle 10 in the longitudinal direction of the tool 1.
  • the method comprises a step of manufacturing the ball 31 of polymer material, for example by injection.
  • a ball 31 is simple and inexpensive to manufacture in large quantities.
  • the method comprises a step of positioning the ball 31 at the bottom of the cavity 13, between the handle 10 and the active portion 20 in the longitudinal direction of the tool 1. Due to its spherical shape, it suffices to let slide or push the ball 31 at the bottom of the cavity 13, without worrying to respect a particular orientation, as would be the case for example with a disk.
  • the method comprises a step of joining the handle 10 and the active part 20 by force fitting, while the ball 31 is positioned at the bottom of the cavity 13.
  • the relative pressure between the handle 10 and the active portion 20 causes the frustoconical portion 25 to crush the recess 17 and partly the bore 16. The end 21 is thus locked in the cavity 13. Subsequently, each use of the tool 1 strengthens this link.
  • the ball 31 When the tool 1 is assembled, the ball 31 is pressed against the shoulder 18 and partially penetrates into the orifice 19, while a volume of air 32 is compressed in the orifice 19.
  • the ball 31 and the air 32 are positioned along the axis X1, between the end 21 of the active portion 20 and the handle 10, thus ensuring their absorption function.
  • FIGS. Figures 5 and 6 Other embodiments of a tool 1 according to the invention are shown in FIGS. Figures 5 and 6 . Some constituent elements of the tool 1 are comparable to those of the first embodiment described above and, for the sake of simplification, bear the same numerical references.
  • the tool 1 comprises an active portion 120 different from the first embodiment.
  • the active portion 120 has a striking end 122 having a protrusion 126 projecting from the surface 124. This protrusion 126 is used to strike the target element 2.
  • the tool 1 comprises an active part 220 and different absorption means 230 of the first embodiment.
  • the active portion 220 has a strike end 222 configured in a point, comprising a frustoconical portion 224 having an apex 226. This tip 222 is used to strike the target element 2.
  • the absorption means 230 comprise both a ball 31 housed at the bottom of the cavity 13 and oil 233 contained between the ball 31 and the handle 10.
  • the ball 31 and the oil 233 are positioned along the axis X1, between the end 21 of the active portion 20 and the handle 10, thus ensuring their absorption function.
  • tool 1 can be shaped differently from Figures 1 to 6 without departing from the scope of the invention as defined by the claims.
  • the striking end 22/122/222 of the active part 20 may have any configuration adapted to the intended application, while the absorption means 30/230 may have any configuration according to claim 1 and allowing absorb the shock wave propagating along the longitudinal axis X1 of the tool 1.
  • the tool 1 can be adapted in terms of cost, ergonomics, functionality and performance.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Percussive Tools And Related Accessories (AREA)

Claims (13)

  1. Schlagwerkzeug (1), umfassend:
    - einen Griff (10), länglich entlang einer Längsrichtung und vorgesehen zum Halten des Werkzeugs (1),
    - einen aktiven Teil (20; 120; 220) zusammengebaut mit dem Griff (10), vorgesehen
    zum Schlagen eines Zielelementes (2), und
    - Stoßdämpferelemente (30; 230), angeordnet zwischen dem Griff (10) und dem aktiven Teil (20; 120; 220) in der Längsrichtung des Werkzeugs (1),
    wobei die Stoßdämpferelemente (30; 230) umfassen:
    - ein Teil aus Polymermaterial (31), angeordnet in direktem Kontakt mit dem aktiven
    Teil (20; 120; 220)
    dadurch gekennzeichnet, dass die Stoßdämpferelemente auch umfassen:
    - ein Medium (32; 233), wie Luft (32) oder Öl (233), enthalten zwischen dem Teil aus Polymermaterial (31) und dem Griff (10) in der Längsrichtung des Werkzeugs (1).
  2. Werkzeug (1) gemäß Anspruch 1, dadurch gekennzeichnet, dass das Teil aus Polymermaterial (31) eine sphärische Kugel ist.
  3. Werkzeug (1) nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das Medium Luft (32) ist.
  4. Werkzeug (1) nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass das Medium Öl (233) ist.
  5. Werkzeug (1) nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass der Griff (10) und der aktive Teil (20; 120; 220) ineinander gesteckt sind, und zwischen sich einen Raum (19, 29) zur Aufnahme der Stoßdämpferelemente (30; 230) bilden, und dadurch, dass wenn das Werkzeug (1) in Betrieb ist, dieser Raum (19, 29) ein substantielles Volumen weist und die Stoßdämpferelemente (30; 230) im Wesentlichen immobil sind.
  6. Werkzeug (1) gemäß Anspruch 5, dadurch gekennzeichnet, dass der Raum (19, 29) zur Aufnahme der Stoßdämpferelemente (30; 230) eine Öffnung (19) umfasst, die das Medium (32; 233) aufnimmt und eine Kammer (39), die den Teil aus Polymermaterial (31) aufnimmt, der teilweise in die Öffnung (19) eindringt.
  7. Werkzeug (1) nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Griff (10) und der aktive Teil (20; 120; 220) beide einteilig sind.
  8. Werkzeug (1) nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass der Griff (10) ein hinteres Endstück (11) aufweist, dass dazu vorgesehen ist, von einer Bedienperson geschlagen zu werden, der aktive Teil (20; 120; 220) weist ein vorderes Endstück (22) auf, vorgesehen um einen Schlag auszuüben, und die Stoßdämpferelemente (30; 230) sind mehr in Nähe des vorderen Endstücks (22) als zum hinteren Endstück (11) hin angeordnet.
  9. Werkzeug (1) nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass der aktive Teil (20; 120; 220) im Griff (10) untergebracht ist.
  10. Werkzeug (1) nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass der Griff (10) im aktiven Teil (20; 120; 220) untergebracht ist.
  11. Verfahren zur Herstellung eines Werkzeugs (1), nach einem der Ansprüche 1 bis 10, dadurch gekennzeichnet, dass es einen Schritt umfasst, der darin besteht, die Stoßdämpferelemente (30; 230) zwischen dem Griff (10) und dem aktiven Teil (20; 120; 220) in der Längsrichtung des Werkzeugs (1) zu positionieren.
  12. Verfahren nach Anspruch 11, dadurch gekennzeichnet, dass es einen Schritt umfasst, der darin besteht, den Griff (10) mit dem aktiven Teil (20; 120; 220) durch Aufpressen fest zu verbinden, während die Stoßdämpferelemente (30; 230) zwischen dem Griff (10) und dem aktiven Teil (20; 120; 220) angeordnet sind.
  13. Verfahren nach einem der Ansprüche 11 oder 12, dadurch gekennzeichnet, dass es einen Schritt umfasst, der darin besteht, einen Raum (19, 29) zur Aufnahme der Stoßdämpferelemente (30; 230) zu bilden, zumindest zum Teil durch Durchbohrung des Griffs (10) oder des aktiven Teils (20; 120; 220) in der Längsrichtung des Werkzeugs (1), bevor die Stoßdämpferelemente (30; 230) positioniert werden.
EP16207256.5A 2016-02-18 2016-12-29 Absorbierendes schlagwerkzeug und herstellungsverfahren eines solchen werkzeugs Active EP3208047B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1651308A FR3047917B1 (fr) 2016-02-18 2016-02-18 Outil de frappe absorbant et procede de fabrication d'un tel outil

Publications (2)

Publication Number Publication Date
EP3208047A1 EP3208047A1 (de) 2017-08-23
EP3208047B1 true EP3208047B1 (de) 2018-10-03

Family

ID=55542998

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16207256.5A Active EP3208047B1 (de) 2016-02-18 2016-12-29 Absorbierendes schlagwerkzeug und herstellungsverfahren eines solchen werkzeugs

Country Status (3)

Country Link
EP (1) EP3208047B1 (de)
ES (1) ES2702935T3 (de)
FR (1) FR3047917B1 (de)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1604007A (en) * 1926-03-10 1926-10-19 Wigren Frank Jones Tool
AU682632B2 (en) * 1995-07-14 1997-10-09 Houghton, Keith Cushioning mechanism
GB2362123B (en) * 2000-05-08 2003-11-12 Hwei-Rung Chou An impact handle for a hand tool
DE60210104T2 (de) * 2001-07-23 2007-03-29 Hard Hat Technology, Llc Schlagwerkzeug mit abplatzschutz
WO2004010765A1 (en) * 2002-07-30 2004-02-05 Roy Russell Non shock shovel
GB2472045A (en) * 2009-07-22 2011-01-26 Markus Graf Tool with shock-absorbing means
DE202009013744U1 (de) * 2009-11-17 2010-03-11 Lin, Chia-Yun Schlagwerkzeug mit Stoßdämpfung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
ES2702935T3 (es) 2019-03-06
FR3047917B1 (fr) 2018-07-13
EP3208047A1 (de) 2017-08-23
FR3047917A1 (fr) 2017-08-25

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