EP3208047B1 - Absorbent striking tool and method for manufacturing such a tool - Google Patents

Absorbent striking tool and method for manufacturing such a tool 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
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EP
European Patent Office
Prior art keywords
tool
handle
active part
accordance
shock absorption
Prior art date
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Application number
EP16207256.5A
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German (de)
French (fr)
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EP3208047A1 (en
Inventor
Bruno Racodon
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Racodon Outillage
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Racodon Outillage
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Publication of EP3208047A1 publication Critical patent/EP3208047A1/en
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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)

Description

La présente invention concerne un outil de frappe d'après le préambule de la revendication 1, ainsi qu'un procédé de fabrication d'un tel outil. Un tel outil de frappe est connu du document US 1 604 007 A . L'outil est par exemple un pointeau, un burin, un chasse-goupille, etc. Le domaine de l'invention est celui des outils à main permettant à un opérateur d'exercer une frappe sur un élément cible. En fonction du type d'outil, cet élément cible peut être une surface au sol, un mur, une bavure, un joint, une goupille, etc.The present invention relates to a striking tool according to the preamble of claim 1, and a method of manufacturing such a tool. Such 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.

Classiquement, un outil de frappe comprend un manche et une partie active. L'opérateur tient le manche dans sa main et positionne la partie active contre l'élément cible. Puis l'opérateur frappe l'extrémité arrière du manche, par exemple avec un marteau, de sorte que l'extrémité avant de la partie active frappe l'élément cible.Typically, a typing tool 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.

Le manche et la partie active sont généralement réalisés en matériaux métalliques, notamment en alliages d'acier. Ces matériaux peuvent être distincts pour s'adapter aux contraintes différentes subies par le manche et la partie active lors de l'utilisation de l'outil.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.

En réaction à l'opération de frappe, une onde de choc remonte le long de l'outil, depuis la partie active vers le manche. Cette onde de choc se propage dans la main, le poignet et le bras de l'opérateur, jusqu'au coude. Ainsi, la manipulation d'un outil de frappe sur une période de temps prolongée peut causer une certaine fatigue, voire des lésions sérieuses, chez l'opérateur.In response to the striking operation, 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. Thus, the manipulation of a striking tool over a prolonged period of time can cause some fatigue, even serious injury, in the operator.

De manière connue, le manche de l'outil peut comporter une enveloppe en matériau élastomère prévue pour amortir le choc. Toutefois, l'onde de choc se propage à l'interface de contact entre la partie active et le manche, suivant l'axe longitudinal de l'outil, de sorte que l'enveloppe ne protège que partiellement l'opérateur.In known manner, the handle of the tool may comprise a casing made of elastomeric material designed to dampen the impact. However, 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.

Le document US1604007 décrit un outil de frappe, comprenant : un manche allongé suivant une direction longitudinale et prévu pour tenir l'outil, une partie active prévue pour frapper un élément cible, une pièce intermédiaire permettant d'assembler le manche et la partie active, et des moyens d'absorption de choc, sous forme d'un disque et un anneau en caoutchouc logés entre le manche et la pièce intermédiaire. Lors d'une frappe, l'onde de choc se propage de la partie active à la pièce intermédiaire, puis au manche en étant amortie par le disque et l'anneau.The document US1604007 discloses 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. During a strike, the shock wave propagates from the active part to the intermediate piece, then to the handle being damped by the disc and the ring.

Le but de la présente invention est de proposer un outil de frappe amélioré.The object of the present invention is to provide an improved typing tool.

A cet effet, l'invention a pour objet un outil de frappe tel que défini à la revendication 1.For this purpose, the subject of the invention is a striking tool as defined in claim 1.

L'outil comprend : un manche allongé suivant une direction longitudinale et prévu pour tenir l'outil, une partie active assemblée avec le manche et prévue pour frapper un élément cible, et des moyens d'absorption de choc interposés entre le manche et la partie active suivant la direction longitudinale de l'outil.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.

L'outil est caractérisé en ce que les moyens d'absorption de choc comprennent à la fois :

  • une pièce en matériau polymère disposée en contact direct avec la partie active, et
  • un fluide, tel que de l'air ou de l'huile, qui est contenu entre la pièce en matériau polymère et le manche suivant la direction longitudinale de l'outil.
The tool is characterized in that the shock absorbing means comprise at the same time:
  • a piece of polymer material arranged in direct contact with the active part, and
  • a fluid, such as air or oil, which is contained between the piece of polymer material and the handle in the longitudinal direction of the tool.

Ainsi, l'invention permet d'améliorer le confort d'utilisation de l'opérateur, et réduire les risques de blessures sur le long terme.Thus, the invention improves operator comfort of use, and reduce the risk of injury in the long term.

Lors d'une frappe, l'onde de choc se propageant suivant la direction longitudinale de l'outil est amortie et absorbée par les moyens d'absorption. Plus précisément, l'onde de choc est amortie et absorbée par la pièce en matériau élastomère, puis se dissipe dans le fluide.During a strike, 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.

En comparaison, les dispositifs connus amortissent l'onde de choc sans l'absorber puis la dissiper, de sorte qu'elle est en partie transmise à l'opérateur.In comparison, the known devices damp the shock wave without absorbing and then dissipating it, so that it is partly transmitted to the operator.

D'autres caractéristiques avantageuses de l'invention sont détaillées ci-après.Other advantageous features of the invention are detailed below.

De préférence, la pièce en matériau polymère est une bille sphérique. Une telle pièce est très facile à fabriquer, puis à intégrer à l'outil. Son positionnement est correct peu importe son orientation, ce qui n'est pas le cas d'un disque par exemple.Preferably, the piece of polymer material is a spherical ball. Such 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.

Selon un mode de réalisation préféré, le fluide est de l'air.According to a preferred embodiment, the fluid is air.

Selon un autre mode de réalisation, le fluide est de l'huile.According to another embodiment, the fluid is oil.

D'autres fluides peuvent être mis en oeuvre, en alternative à l'air et à l'huile, sans sortir du cadre de l'invention.Other fluids can be used, as an alternative to air and oil, without departing from the scope of the invention.

Selon une caractéristique avantageuse, le manche et la partie active sont emmanchés, délimitant entre eux un espace de réception des moyens d'absorption de choc. Lorsque l'outil est en service, cet espace présente un volume substantiellement stable et les moyens d'absorption de choc restent substantiellement immobiles, contrairement à certains outils existants, équipés de ressorts ou autres pièces compression.According to an advantageous characteristic, the handle and the active part are fitted together, delimiting between them a reception space of the shock absorption means. When the tool is in use, 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.

Plus précisément, l'espace de réception des moyens d'absorption de choc comprend un orifice recevant le fluide, et une chambre recevant la pièce en matériau polymère qui pénètre partiellement dans l'orifice.More specifically, 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.

Selon une autre caractéristique avantageuse, le manche et la partie active sont tous deux monoblocs. Autrement dit, l'outil est uniquement constitué de trois composants : le manche monobloc, la partie active monobloc, et les moyens d'absorption de choc.According to another advantageous characteristic, the handle and the active part are both monoblocs. In other words, the tool consists solely of three components: the one-piece handle, the one-piece active part, and the shock absorption means.

Selon une autre caractéristique avantageuse, le manche présentant une extrémité arrière prévue pour être frappée par un opérateur, la partie active présentant une extrémité avant prévue pour exercer un impact, alors les moyens d'absorption de choc sont plus rapprochés de l'extrémité avant que de l'extrémité arrière.According to another advantageous characteristic, 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.

De préférence, la partie active est logée dans le manche.Preferably, the active part is housed in the handle.

En alternative, le manche est logé dans la partie active.Alternatively, the handle is housed in the active part.

L'invention a également pour objet un procédé de fabrication d'un outil tel que mentionné ci-dessus.The invention also relates to a method of manufacturing a tool as mentioned above.

Le procédé est caractérisé en ce qu'il comprend une étape consistant à positionner les moyens d'absorption de choc entre le manche et la partie active suivant la direction longitudinale de l'outil.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.

En outre, le procédé comprend une étape consistant à solidariser le manche et la partie active par emmanchement en force, alors que les moyens d'absorption de choc sont interposés entre le manche et la partie active.In addition, 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.

Egalement, le procédé comprend une étape consistant à former un espace de réception des moyens d'absorption de choc, au moins en partie par perçage dans le manche ou dans la partie active suivant la direction longitudinale de l'outil, avant de positionner les moyens d'absorption de choc.Also, 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.

L'invention sera mieux comprise à la lecture de la description qui va suivre, donnée uniquement à titre d'exemple non limitatif et faite en référence aux dessins annexés sur lesquels :

  • la figure 1 est une vue de côté d'un outil de frappe conforme à l'invention ;
  • la figure 2 est une coupe selon la ligne II-II à la figure 1, montrant l'outil avant assemblage ;
  • la figure 3 est une coupe analogue à la figure 2, montrant l'outil assemblé ;
  • la figure 4 est une vue à plus grande échelle d'une partie de la figure 3 ;
  • la figure 5 est une coupe analogue à la figure 4, montrant un outil conforme à un deuxième mode de réalisation de l'invention ; et
  • la figure 6 est une coupe analogue à la figure 4, montrant un outil conforme à un troisième mode de réalisation de l'invention.
The invention will be better understood on reading the description which follows, given solely by way of nonlimiting example and with reference to the appended drawings in which:
  • the figure 1 is a side view of a striking tool according to the invention;
  • the figure 2 is a section along the line II-II to the figure 1 , showing the tool before assembly;
  • the figure 3 is a cut similar to the figure 2 , showing the assembled tool;
  • the figure 4 is a larger-scale view of some of the figure 3 ;
  • the figure 5 is a cut similar to the figure 4 , showing a tool according to a second embodiment of the invention; and
  • the figure 6 is a cut similar to the figure 4 , showing a tool according to a third embodiment of the invention.

Sur les figures 1 à 4 est représenté un outil de frappe absorbant 1 conforme à l'invention. L'outil 1 est conçu pour exercer une frappe sur un élément cible 2, représenté schématiquement à la figure 1 seulement dans un but de simplification.On the Figures 1 to 4 is shown an absorbent striking tool 1 according to the invention. Tool 1 is designed to strike a target element 2, shown schematically in FIG. figure 1 only for the sake of simplification.

L'outil 1 présente une forme allongée suivant un axe longitudinal X1. L'outil 1 comprend un manche 10 et une partie active 20 centrés sur l'axe X1.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.

Selon l'invention, l'outil 1 comprend des moyens d'absorption de choc 30 interposés entre le manche 10 et la partie active 20, suivant la direction longitudinale de l'outil 1 définie par l'axe X1.According to the invention, 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.

Le manche 10 est réalisé en métal, de préférence en acier. En pratique, le matériau du manche 10 est choisi en fonction du type d'outil 1 et des normes. Le manche 10 est allongé entre une extrémité arrière 11 et une extrémité avant 12. Le manche 10 est tenu à la main par l'opérateur, entre les extrémités 11 et 12. L'extrémité 11 est prévue pour être frappée par l'opérateur, généralement à l'aide d'un marteau ou d'une masse. L'extrémité 12 est prévue pour recevoir la partie active 20. Le manche 10 comporte une cavité 13 ménagée à son extrémité 12. La cavité 13 est centrée sur l'axe X1 et débouche à l'extrémité 12.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.

Comme montré plus en détail aux figures 3 et 4, la cavité 13 comporte une embouchure 14 de forme tronconique, deux alésages cylindriques 15 et 16 délimités par un décrochement 17, et un épaulement radial 18 en son fond. L'embouchure 14 est évasée vers l'extérieur, de manière à faciliter l'introduction de la partie active 20 dans la cavité 13. L'alésage 16 présente un diamètre inférieur à l'alésage 15, de manière à recevoir la partie active 20 par emmanchement en force. L'épaulement 18 fait face à l'embouchure 14.As shown in more detail in Figures 3 and 4 , 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.

La cavité 13 est en communication avec un orifice cylindrique 19, pourvu d'un fond 19a de forme tronconique. L'orifice 19 et son fond 19a sont formés lors du perçage d'un premier alésage permettant de réaliser la cavité 13 dans le manche 10. L'épaulement 18 sépare la cavité 13 et l'orifice 19.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.

La partie active 20 est réalisée en métal, de préférence en acier. En pratique, le matériau et la forme de la partie active 20 sont choisis en fonction du type d'outil 1 et des normes. Dans le mode de réalisation des figures 1 à 4, la partie active 20 est un pointeau de forme cylindrique. La partie active 20 est allongée entre une extrémité arrière 21 et une extrémité avant 22.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.

L'extrémité 21 est prévue pour être emmanchée dans la cavité 13 du manche 10. L'extrémité 21 comporte une surface d'appui 23, radiale de forme circulaire plane. Avantageusement, l'extrémité 21 comporte également une portion tronconique 25 facilitant l'introduction de la partie active 20 dans la cavité 13.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. Advantageously, the end 21 also comprises a frustoconical portion 25 facilitating the introduction of the active portion 20 into the cavity 13.

L'extrémité 22 est prévue pour exercer un impact sur l'élément cible 2, lorsque l'opérateur exerce un impact sur l'extrémité 11 du manche 10. L'extrémité 22 comporte une surface de frappe 24 radiale, de forme circulaire plane.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.

Les moyens d'absorption 30 comprennent une bille 31 en matériau polymère, notamment en matériau élastomère ou thermoplastique, par exemple en polychloroprène (CR), polypropylène (PP) ou polychlorure de vinyle (PVC). La bille 31 présente une forme sphérique. En alternative, les moyens d'absorption 30 peuvent comprendre une pièce en matériau polymère de toute forme adaptée, par exemple cylindrique ou parallélépipédique. De préférence, les moyens d'absorption 30 comprennent une unique pièce monobloc en matériau polymère, et non plusieurs pièces, ce qui simplifie la fabrication de l'outil 1.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. Alternatively, the absorption means 30 may comprise a piece of polymer material of any suitable shape, for example cylindrical or parallelepipedal. Preferably, the absorption means 30 comprise a single piece of polymer material, not several pieces, which simplifies the manufacture of the tool 1.

La bille 31 est logée dans une chambre 39 délimitée au fond de la cavité 13, entre l'alésage 16, l'épaulement 18 et la surface 23. Lorsque la partie active 20 est emmanchée dans la cavité 13, la bille 31 est comprimée contre l'épaulement 18 et pénètre partiellement dans l'orifice 19.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.

Ainsi, les moyens d'absorption 30 comprennent également de l'air 32, qui est contenu entre la bille 31 et le manche 10, dans l'orifice 19.Thus, the absorption means 30 also comprise air 32, which is contained between the ball 31 and the handle 10, in the orifice 19.

En pratique, les moyens d'absorption 30 sont conçus et agencés de manière à absorber l'onde choc se propageant suivant la direction longitudinale de l'outil 1, sans la transmettre à l'opérateur. Son confort de travail est amélioré, et son risque de blessure est réduit.In practice, 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.

Le procédé de fabrication de l'outil 1 est détaillé ci-après.The manufacturing method of the tool 1 is detailed below.

Le procédé comprend une étape de fabrication du manche 10, par exemple par forgeage ou coulée en fonderie, puis usinage du profil externe et de la cavité 13.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.

Le procédé comprend une étape de fabrication de la partie active 20, par exemple par forgeage ou coulée en fonderie, puis usinage du profil externe.The method comprises a step of manufacturing the active part 20, for example by forging or casting, and then machining the external profile.

Le procédé comprend une étape consistant à former l'espace 19+39 de réception des moyens d'absorption de choc 30 avant de les positionner dans l'outil 1. Cet espace 19+39 est formé au moins en partie par perçage dans le manche 10 suivant la direction longitudinale de l'outil 1.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.

Le procédé comprend une étape de fabrication de la bille 31 en matériau polymère, par exemple par injection. Une telle bille 31 est simple et peu coûteuse à fabriquer, en grande quantité.The method comprises a step of manufacturing the ball 31 of polymer material, for example by injection. Such a ball 31 is simple and inexpensive to manufacture in large quantities.

Suite aux étapes ci-dessus, le procédé comprend une étape consistant à positionner la bille 31 au fond de la cavité 13, entre le manche 10 et la partie active 20 suivant la direction longitudinale de l'outil 1. Grâce à sa forme sphérique, il suffit de laisser glisser ou de pousser la bille 31 au fond de la cavité 13, sans se préoccuper de respecter une orientation particulière, comme ce serait le cas par exemple avec un disque.Following the steps above, 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.

Enfin, le procédé comprend une étape consistant à solidariser le manche 10 et la partie active 20 par emmanchement en force, alors que la bille 31 est positionnée au fond de la cavité 13. Lorsque l'extrémité 21 de la partie active 20 est introduite dans la cavité 13 du manche 10, la pression relative entre le manche 10 et la partie active 20 fait que la portion tronconique 25 vient écraser le décrochement 17 et en partie l'alésage 16. L'extrémité 21 est ainsi bloquée dans la cavité 13. Par la suite, chaque utilisation de l'outil 1 renforce cette liaison.Finally, 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. When the end 21 of the active part 20 is introduced into the cavity 13 of the handle 10, 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.

Lorsque l'outil 1 est assemblé, la bille 31 est comprimée contre l'épaulement 18 et pénètre partiellement dans l'orifice 19, tandis qu'un volume d'air 32 est comprimé dans l'orifice 19. La bille 31 et l'air 32 sont positionnés suivant l'axe X1, entre l'extrémité 21 de la partie active 20 et le manche 10, assurant ainsi leur fonction d'absorption.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.

D'autres modes de réalisation d'un outil 1 conforme à l'invention sont montrés aux figures 5 et 6. Certains éléments constitutifs de l'outil 1 sont comparables à ceux du premier mode de réalisation décrit plus haut et, dans un but de simplification, portent les mêmes références numériques.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.

Sur la figure 5, l'outil 1 comprend une partie active 120 différente du premier mode de réalisation.On the figure 5 , the tool 1 comprises an active portion 120 different from the first embodiment.

La partie active 120 a une extrémité de frappe 122 comportant une protubérance 126 formée en saillie sur la surface 124. Cette protubérance 126 est utilisée pour frapper l'élément cible 2.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.

Sur la figure 6, l'outil 1 comprend une partie active 220 et des moyens d'absorption 230 différents du premier mode de réalisation.On the figure 6 the tool 1 comprises an active part 220 and different absorption means 230 of the first embodiment.

La partie active 220 a une extrémité de frappe 222 configurée en pointe, comportant une portion tronconique 224 présentant un sommet 226. Cette pointe 222 est utilisée pour frapper l'élément cible 2.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.

Les moyens d'absorption 230 comprennent à la fois une bille 31 logée au fond de la cavité 13 et de l'huile 233 contenue entre la bille 31 et le manche 10. La bille 31 et l'huile 233 sont positionnées suivant l'axe X1, entre l'extrémité 21 de la partie active 20 et le manche 10, assurant ainsi leur fonction d'absorption.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.

En pratique, l'outil 1 peut être conformé différemment des figures 1 à 6 sans sortir du cadre de l'invention telle que définie par les revendications.In practice, tool 1 can be shaped differently from Figures 1 to 6 without departing from the scope of the invention as defined by the claims.

En particulier, l'extrémité de frappe 22 / 122 / 222 de la partie active 20 peut présenter toute configuration adaptée à l'application visée, tandis que les moyens d'absorption 30 / 230 peuvent présenter toute configuration selon la revendication 1 et permettant d'absorber l'onde de choc se propageant suivant l'axe longitudinal X1 de l'outil 1.In particular, 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.

Par ailleurs, les caractéristiques techniques des différents modes de réalisation et variantes mentionnés ci-dessus peuvent être, en totalité ou pour certaines d'entre elles, combinées entre elles, dans le cadre des revendications.Furthermore, the technical features of the various embodiments and variants mentioned above may be, in whole or in part, in combination with each other within the scope of the claims.

Ainsi, l'outil 1 peut être adapté en termes de coût, d'ergonomie, de fonctionnalités et de performance.Thus, the tool 1 can be adapted in terms of cost, ergonomics, functionality and performance.

Claims (13)

  1. Striking tool (1) incorporating:
    - a handle (10) extended in a longitudinal direction and designed to hold the tool (1);
    - an active part (20; 120; 220) assembled with the handle (10) and designed for striking a target item (2); and
    - a means of shock absorption (30; 230) positioned between the handle (10) and the active part (20; 120; 220) in the longitudinal direction of the tool (1);
    with the means of shock absorption (30; 230) incorporating:
    - a part made of a polymer material (31), positioned in direct contact with the active part (20; 120; 220);
    characterized in that the means of shock absorption also incorporates:
    - a fluid (32; 233) such as air (32) or oil (233), that is contained between the part made of polymer material (31) and the handle (10), in the longitudinal direction of the tool (1).
  2. Tool (1) in accordance with claim 1, characterized in that the part made of polymer material (31) is a spherical ball.
  3. Tool (1) in accordance with one of claims 1 or 2, characterized in that the fluid is air (32).
  4. Tool (1) in accordance with one of claims 1 or 2, characterized in that the fluid is oil (233).
  5. Tool (1) in accordance with one of claims 1 to 4, characterized in that the handle (10) and the active part (20; 120; 220) are force-fitted together, creating a space (19; 29) between them to accommodate a means of shock absorption (30; 230), and in that when the tool (1) is working, this space (19; 29) has a substantially-stable volume and the means of shock absorption (30; 230) remains substantially immobile.
  6. Tool (1) in accordance with claim 5, characterized in that the space (19; 29) for accommodating the means of shock absorption (30; 230) incorporates an aperture (19) accommodating the fluid (32; 233) and a chamber (39) accommodating the part made of polymer material (31), which partially protrudes into the aperture (19).
  7. Tool (1) in accordance with one of claims 1 to 6, characterized in that the handle (10) and the active part (20; 120; 220) are both one-piece.
  8. Tool (1) in accordance with one of claims 1 to 7, characterized in that the handle (10) has a rear extremity (11) designed to be struck by an operator, with the active part (20; 120; 220) having a front extremity (22) designed to apply an impact, and the means of shock absorption (30; 230) is closer to the front extremity (22) than the rear extremity (11).
  9. Tool (1) in accordance with one of claims 1 to 8, characterized in that the active part (20; 120; 220) is housed within the handle (10).
  10. Tool (1) in accordance with one of claims 1 to 9, characterized in that the handle (10) is housed in the active part (20; 120; 220).
  11. Process for manufacturing a tool (1) in accordance with one of claims 1 to 10, characterized in that it includes a stage consisting in positioning the means of shock absorption (30; 230) between the handle (10) and the active part (20; 120; 220), in the longitudinal direction of the tool (1).
  12. Process in accordance with claim 11, characterized in that it includes a stage consisting in rendering the handle (10) and the active part (20; 120; 220) integral through force-fitting together, while the means of shock absorption (30; 230) is positioned between the handle (10) and the active part (20; 120; 220).
  13. Process in accordance with one of claims 11 or 12, characterized in that it includes a stage consisting in forming a space (19; 29) to accommodate a means of shock absorption (30; 230), at least partly by drilling into the handle (10) or into the active part (20; 120; 220) in the longitudinal direction of the tool (1), before positioning the means of shock absorption (30; 230).
EP16207256.5A 2016-02-18 2016-12-29 Absorbent striking tool and method for manufacturing such a tool Active EP3208047B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1651308A FR3047917B1 (en) 2016-02-18 2016-02-18 ABSORBENT STRIKING TOOL AND METHOD OF MANUFACTURING SUCH TOOL

Publications (2)

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

Family

ID=55542998

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16207256.5A Active EP3208047B1 (en) 2016-02-18 2016-12-29 Absorbent striking tool and method for manufacturing such a tool

Country Status (3)

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

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 (en) * 2001-07-23 2007-03-29 Hard Hat Technology, Llc IMPACT TOOL WITH PLASTER PROTECTION
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 (en) * 2009-11-17 2010-03-11 Lin, Chia-Yun Impact tool with shock absorption

Non-Patent Citations (1)

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

Also Published As

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

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