EP2361169B1 - Multipurpose striking device with a mechanism for absorbing the energy transmitted to the gripping means - Google Patents

Description

The invention relates to the technical sector of hand-held tools that can be used for various purposes. They are single-handed tools for driving any product into a support of various materials. It can be marking tools on a product. It can be tools for cutting type cookie cutters.

It is also known in other features for example clamping-loosening to have hand keys and specifically socket wrenches receiving ranges of sockets shapes, dimensions and various impressions likely to provide the clamping function -drawing in good conditions.

The invention is specifically aimed at hand-held tools for which many problems remain.

First of all, there is a safety problem when striking so as not to injure the operator's hand, for example by using a guard for a hand-held tool made of elastomeric material as described in FIG. FR 2431352 . This type of guard is common and gives protection in case of shifting of the head of the striking tool. This type of care is interesting, but is limited to a specific job.

We know by the US Patent 6,928,899 a tool for multi-purpose typing according to the preamble of claim 1. The US Patent 6128 977 is quoted for information.

Another problem lies in the deterioration of the striking head of these types of hand-held tools, and this in different applications mentioned above without limitation, requiring a complete change of tool.

Despite some surface treatments, the striking heads of the tools are deteriorated, which facilitates the effects of shifting and thus injuries. Therefore, in case of deterioration too strong, the only solution is to change the tool as a whole, which entails consequent costs.

Another problem lies in the effect of .rebondissement and vibratory effect of the tool after hit by the counter-thrust reaction following the force of striking, which can generate inaccuracies during the striking and the accidents. This phenomenon can be inconvenient for the user, and in particular at the muscular level.

Faced with this diversity of problems, which are all closely combined with penalizing cumulative effects, the applicant's approach has been to find a new type of hand-held tool that is more secure for the operator, which is adaptable according to needs and applications with a removable impact head to be replaced and / or thrown according to the impactor, the deterioration of the striking area.

Another goal sought was to improve the physical safety of the operator by moving his grip away from the body of the tool away from the striking zone.

After various research works taking into account all the aforementioned constraints, a solution has been provided that responds to the various problems raised.

According to the invention, a multi-purpose typing tool is provided with the features of claim 1.

Thus, the multi-purpose striking tool is remarkable in that it comprises a mechanism absorbing energy transmitted to the gripping means, said mechanism comprising an elastic return means, which is assembled with the support body, the handle, and the head interchangeable to form a common base and then being able to receive complementary means integrating with this base according to the applications concerned, and in that the handle is arranged with a stepped inner portion whose upper face constitutes the support an elastic means having an energy absorbing function transmitted to the handle and thereby limiting the vibrations and in that the interchangeable impact head comprises a portion centered in the ring and an appendage engaging in an internal bore of the body.

These and other characteristics will be apparent from the rest of the description.

• la figure 1 est une vue éclatée en perspective avant montage des éléments constitutifs de l'outil de frappe comprenant le mécanisme absorbant d'énergie avec ses éléments constitutifs essentiels avant réception de l'outil selon les applications considérées, un mandrin pour emporte-pièce étant représenté à titre d'exemple.
• la figure 2 est une vue en perspective de l'outil de frappe selon l'invention dans son application emporte-pièces.
• la figure 3 est une vue en plan de l'outil selon la figure 2.
• la figure 4 est une vue en coupe transversale selon la ligne A-A de la figure 3 de l'outil de frappe à main dans sa version montée, avec emporte pièce.
• la figure 5 est une vue en coupe selon la ligne F-F de la figure 4.
• La figure 6 est une vue en coupe selon la ligne H-H de la figure 4
• la figure 7 est une vue en perspective éclatée de l'outil de frappe selon l'invention dans son application de marquage.
• La figure 8 est une vue en plan de l'outil selon la figure 7.
• la figure 9 est une vue en coupe transversale selon la ligne B-B de la figure 8 de l'outil de frappe à main dans sa version montée.
• la figure 10 est une vue en perspective éclatée et de dessus montrant l'outil de frappe à main dans sa version emporte-pièce à titre d'exemple pour en illustrer les caractéristiques de montage.

For fixing the object of the invention illustrated in a nonlimiting manner to the figures of the drawings where:

• the figure 1 is an exploded view in perspective before mounting of the constituent elements of the striking tool comprising the energy absorbing mechanism with its essential components before receiving the tool according to the applications in question, a die for mandrel being represented as example.
• the figure 2 is a perspective view of the striking tool according to the invention in its punching application.
• the figure 3 is a plan view of the tool according to the figure 2 .
• the figure 4 is a cross-sectional view along line AA of the figure 3 of the hand-held tool in its assembled version, with die cutter.
• the figure 5 is a sectional view along the line FF of the figure 4 .
• The figure 6 is a sectional view along line HH of the figure 4
• the figure 7 is an exploded perspective view of the striking tool according to the invention in its marking application.
• The figure 8 is a plan view of the tool according to the figure 7 .
• the figure 9 is a cross-sectional view along line BB of the figure 8 of the hand-held tool in its mounted version.
• the figure 10 is an exploded perspective view from above showing the hand-knocking tool in its punch-out version as an example to illustrate the mounting characteristics.

In order to make the object of the invention more concrete, it is now described in a nonlimiting manner illustrated in the figures of the drawings.

The multi-purpose punching tool according to the invention is referenced as a whole by (O) and it comprises a mechanism absorbing the energy transmitted to the gripping means. This mechanism comprises four main elements, namely a support body (1), a handle (2), an elastic return means (3) and an interchangeable head (4), these four elements being assembled to constitute a common base and being may then receive additional resources integrating this base according to the applications concerned. The figure 1 thus illustrates the aforementioned common base, with the implementation by way of example of a die chuck.

The striking tool comprises a cylindrical body (1) with in its lower part a shouldered portion (1a) of larger diameter than the upper part (1b) so as to allow the positioning and support of a ring (2a). ) associated and shaped with the handle part. The cylindrical body (1) has a bore (1c) therethrough, the shoulder portion (1a) being of a diameter substantially greater than the underlying portion (1c1). In addition, the body (1) has a groove (1d) over the entire height of the portion (1b) having an anti-rotation function, as will be explained later. This body is made of any suitable material.

The handle portion (2) comprises a ring (2a) for centering and fixing on the body and is arranged internally with an inner shoulder (2b) and a notch (2c), the latter being capable of penetrating into the groove (1d ) formed on the body. The stepped inner part (2b) therefore surrounds the upper part (1b) of the body (1), and defines on its upper horizontal face (2d) a bearing plane of an elastic means (3) having an absorbing function of energy, transmitted to the handle and limiting the vibrations.

The handle (2) is extended at the rear by an arm (2e) including if necessary a support zone (5) of flexible material, adapted to the comfort of the hand of the operator, in a manual version. This handle therefore creates a part depréhension deported relative to the body (1) and the striking head (4) avoiding or significantly limiting the vibratory effects when typing. In a robotic use version of the striking tool, the arm portion (2e) can be grasped by any gripping means. The handle (2) is for example monobloc and is made of any suitable material generating flexibility, comfort and ergonomics. In its length, the arm (2e) of the handle may have one or two housings (2f) for receiving an angled wrench (6) with the sides of the type known under the trademark ALEN with hexagon socket cooperate with screwing and connecting means (7) which will be exposed thereafter.

The resilient means (3) is for example of the wave spring type, helical type compression spring or any equivalent means of the elastomeric ring type or the like providing the same compression function. The resilient means (3) bears on the bearing surface (2d) of the handle ring. The striking head (4), which is intended to be interchangeable to take into account its deterioration, comprises a central portion (4a) centered in the ring (2a) bearing and in compression on the elastic means (3). The striking head (4) further comprises a cylindrical appendix (4b) engageable in the internal bore (1c) of the body (1). Said head therefore comes into elastic support on the means (3) energy absorber and its face (4e) on the upper face (1f) of the body. Thus the striking head is in direct support on the body for the full transmission of the striking power. The upper part (4d) of the head undergoes for example a surface treatment that allows it to receive the blows given by a mass or the like. Thus, the concept of interchangeable head allows for a range of heads with different technical characteristics.

To avoid any unexpected escape of the striking head, it can be maintained in the ring (2a) of the handle with a certain freedom of movement by pressing on the elastic means, while being retained at the top by a clipping of detention. The striking head may nevertheless be removed depending on the need for change.

It is emphasized that during the striking, the vertical acceleration experienced by the whole body (1) and head (4) causes compression of the medium elastic (3) and therefore a relative movement relative to the ring (2a) of the handle (2).

The striking tool having been described in its basic basic means, it is now appropriate with reference to the figures of the drawings to describe non-limiting two examples of application of the invention.

The first application of the invention is aimed at punching cutters for cutting discs, pellets, washers for example on metal material supports or the like.

The striking tool then includes three complementary parts, namely a mandrel (8) that fits and attach around the shoulder portion (1a) formed on the body, one or more screws (7) connecting radially the tightening of the whole. The mandrel is of the type known in the FR 2807692 owned by the applicant. The mandrel comprises a plurality of steps (8a) of progressive diameter with complementary shapes described in this patent to allow the attachment of cutting tool (9) known per se.

In an implementation, for example, the mandrel (8) is screwed onto the body, allowing on the one hand its engagement by its upper recessed central part (8b) around the cylindrical seat (1a) with a connecting screw (7). and secondly for the screwing of the profiled end (1h) in the tapping (8c) provided for this purpose in the mandrel.

Due to the nature of the application, it is provided both on the body (1) and on the ring (2a) of the handle openings (1n) and (2m) for the disposal of cutting waste. materials. They go up in the body of the tool and are evacuated radially. The orientation of these openings (1n) and (2m) will depend on the application of the striking tool.

Referring to the second marking application, the cylindrical body internally receives the marking tool (10) whose end has the mark. One or more screws (7) arranged in shapes on the stepped shoulder portion (1a) of the body provide clamping in position.

Without departing from the scope of the invention, the body can be arranged in a complementary manner depending on the applications. For example, the body may be arranged to allow the passage of a rod in the use of a cutting compass (patent FR 2788459 ).

The advantages are apparent from the invention. It emphasizes the multi-purpose capacity of the striking tool comprising a mechanism absorbing the energy transmitted to the gripping means, its adaptability to meet the needs, the best safety for the operator for which his grip and his grip in general is deported by the handle out of the striking field. It also emphasizes the interchangeability of the impact head according to needs and its surface condition.

It also emphasizes the virtual elimination of absorbed vibrations transmitted to the hand of the operator, since it is far from the strike zone.

Another important advantage of the invention in particular in the die-cutter application lies in the fact that the mass has been reduced in movement thanks to the offset of the grip of the tool. As a result, the power transmitted to the tool is greater thanks to this arrangement.

Moreover, the suppression or quasi-suppression of the vibrations also makes it possible to obtain a cutting or a marking according to the applications, of better quality, because of the limitation of the rebound of the bearing surface of the punch or the marking means on the worked support. The effectiveness of the damping is not related to the manual holding force of the tool.

We also get a better hold of the set when typing. The constitutive materials used for the components are chosen according to the applications.

Finally, there is an indirect but practical advantage which is the storage of the bent-wrench (6) for tightening and loosening of the connecting screws inside the arm of the handle, partially projecting by its short side (6a) and embedded in the back of the handle.

Claims (9)

1. Multipurpose striking tool that incorporates a mounting body (1), a handle (2), and an interchangeable head (4), of which the cylindrical body (1) has, at its bottom part, a shouldered part (1a) of greater diameter than its upper part (1b), so as to enable the positioning and bearing of a ring (2a) associated and shaped with the handle (2), with the said striking head (4) bearing directly on the body (1) to transmit it all the power of the strike, and of which the handle (2) is extended at the rear by an arm, characterized by the fact that the striking tool includes a mechanism absorbing energy transmitted via the gripping system; the said mechanism incorporates an elastic return system (3) that is assembled on the mounting body (1), the handle (2) and the interchangeable head (4) to constitute a common base, and can subsequently accommodate additional systems that integrate with this base, according to the applications concerned, and by the fact that the handle is fitted with an interior shouldered part (1a) having the function of absorbing energy transmitted to the handle, thereby reducing vibrations, and by the fact that the interchangeable striking head includes a part centered in the ring and an auxiliary part that engages within an interior bore in the body.
2. Striking tool according to claim 1, characterized by the fact that the cylindrical body (1) has a bore (1c) traversing with the shouldered part (1a), being of diameter greater than the subadjacent part of (1cl), the body having grooving (1d) over the entire height of the part (1b) having an anti-rotation function.
3. Striking tool according to claim 2, characterized by the fact that the handle part (2) includes a ring (2a) for centering and securing on the body, and is fitted internally with an inner shouldering (2b) and a notch (2c), the which can enter the groove (1d) formed on the body, and by the fact that the interior shouldered part (2b) surrounds the upper part of the body (1); on its horizontal upper face (2d) has a surface for the bearing of an elastic system (3) having a function of absorbing energy transmitted to the handle, reducing the vibrations.
4. Striking tool according to claim 1, characterized by the fact that, within its length, the arm of the handle (2e) can have one or more housings (2f) for the accommodation of an Allen wrench (6).
5. Striking tool according to claim 1, characterized by the fact that the elastic system (3) is of wave spring type, or of any type that implements the compression function.
6. Striking tool according to claim 1, characterized by the fact that the striking head (4), which is designed to be interchangeable to take account of damage, includes a central part (4a) centered within the ring (2a) that bears against and is in compression against the elastic system, and by the fact that the auxiliary part (4b) is cylindrical, and by the fact that the said head bears elastically on the system (3) and, via its face (4e), on the upper part (1f) of the body (1).
7. Striking tool according to claim 1, characterized by the fact that in the part-carrying application, there are three complementary parts, namely a chuck (8) that fits and attaches around the span (1a) formed on the body, one or more connecting screws (7) that secure the assembly radially, and a cutting tool (9).
8. Striking tool according to claim 7, characterized by the fact that, on the body (1) and on the ring (2a) of the handle, there are openings (1n) and (2m) for discarding cut material waste.
9. Striking tool according to claim 1, characterized by the fact that, in its application for marking, the cylindrical body internally accommodates a marking tool (10) of which the end presents the mark; one or more screws (7) located in forms in the end collar of the body ensure tightening in position.

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